WO2024095482A1 - Slide fastener - Google Patents

Slide fastener Download PDF

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Publication number
WO2024095482A1
WO2024095482A1 PCT/JP2022/041244 JP2022041244W WO2024095482A1 WO 2024095482 A1 WO2024095482 A1 WO 2024095482A1 JP 2022041244 W JP2022041244 W JP 2022041244W WO 2024095482 A1 WO2024095482 A1 WO 2024095482A1
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WO
WIPO (PCT)
Prior art keywords
fastener
slide fastener
tape
slide
center line
Prior art date
Application number
PCT/JP2022/041244
Other languages
French (fr)
Japanese (ja)
Inventor
耕平 川原田
久知 杉田
潤 志鷹
Original Assignee
Ykk株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ykk株式会社 filed Critical Ykk株式会社
Priority to PCT/JP2022/041244 priority Critical patent/WO2024095482A1/en
Priority to CN202310620911.3A priority patent/CN117981952A/en
Priority to CN202321335939.4U priority patent/CN220236213U/en
Publication of WO2024095482A1 publication Critical patent/WO2024095482A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B19/00—Slide fasteners
    • A44B19/02—Slide fasteners with a series of separate interlocking members secured to each stringer tape
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B19/00—Slide fasteners
    • A44B19/02—Slide fasteners with a series of separate interlocking members secured to each stringer tape
    • A44B19/04—Stringers arranged edge-to-edge when fastened, e.g. abutting stringers
    • A44B19/06—Stringers arranged edge-to-edge when fastened, e.g. abutting stringers with substantially rectangular members having interlocking projections and pieces
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B19/00—Slide fasteners
    • A44B19/24—Details
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B19/00—Slide fasteners
    • A44B19/24—Details
    • A44B19/34—Stringer tapes; Flaps secured to stringers for covering the interlocking members

Definitions

  • This disclosure relates to a slide fastener.
  • Metal elements and resin elements are known as fastener elements for slide fasteners; the former are attached to the side edge of the fastener tape by tightening (i.e., through plastic deformation of the metal), while the latter are attached to the side edge of the fastener tape by injection molding.
  • Metal elements have a higher gloss than resin elements, and this appearance is often preferred. Of course, there are also cases where a matte, non-glossy appearance is preferred even for metal elements.
  • Patent Document 1 discloses a resin element that looks similar to a metal element. Metal elements have sufficient attachment strength even though they are narrow because they are clamped against the fastener tape. On the other hand, resin elements do not. Therefore, Patent Document 1 achieves both sufficient attachment strength and a narrow element width by providing a relatively thick portion (see reference 12 in Figure 1 of Patent Document 1) and a tapered portion (see reference 13 in Figure 1 of Patent Document 1).
  • Patent Document 2 also discloses a similar resin element.
  • a quadrilateral surface see reference 24a in FIG. 2 of Patent Document 2
  • a tapered surface see reference 24b in FIG. 2 of Patent Document 2
  • Known metal elements include the one shown in FIG. 19 of Patent Document 2 (called a single-sided metal element in Patent Document 2) and the one shown in FIG. 20 and FIG. 21 of Patent Document 2 (called a double-sided metal element in Patent Document 2).
  • Patent document 3 discloses that a single fastener element is provided with two divided sections to make the fastener element appear narrower.
  • the resin element can be made to have a similar appearance to the metal element by narrowing the width, and the sliding resistance of the slider can be reduced by the narrowing.
  • the resin element can be made to have a similar appearance to the metal element by narrowing the width, and the sliding resistance of the slider can be reduced by the narrowing.
  • the resin element can be made to have a similar appearance to the metal element by narrowing the width, and the sliding resistance of the slider can be reduced by the narrowing.
  • the resin element can be made to have a similar appearance to the metal element by narrowing the width, and the sliding resistance of the slider can be reduced by the narrowing.
  • the method of Patent Document 3 can make the fastener element look narrow, but does not achieve narrowing of the fastener element itself, and as a result, it is not possible to reduce the sliding resistance of the slider.
  • the inventors of the present application have discovered a new problem: how to further reduce the sliding resistance of the slider by further reducing the width of the fastener element.
  • a slide fastener includes a pair of left and right fastener stringers, each of which includes a fastener tape and a plurality of fastener elements attached to the side edge of the fastener tape at a predetermined pitch, each of which includes a lower element portion and an upper element portion provided below and above the plane on which the fastener tape exists, and the lower element portion includes at least one engaging portion and at least one engaged portion, and a slider that advances along the center line of the slide fastener to alternately engage the individual fastener elements included in one of the pair of left and right fastener stringers with the individual fastener elements included in the other of the pair of left and right fastener stringers, and that moves backward along the center line of the slide fastener to disengage them.
  • each fastener element includes a single elongated portion including an upper surface extending along the width direction of the slide fastener perpendicular to the center line of the slide fastener, a front side surface extending along the width direction of the slide fastener, and a rear side surface extending along the width direction of the slide fastener.
  • the upper part of each fastener element is shaped so as not to straddle the center line of the slide fastener.
  • a slide fastener comprises a pair of left and right fastener stringers, each of which includes a fastener tape and a plurality of fastener elements attached to the side edge of the fastener tape at a predetermined pitch, each of which includes a lower element portion and an upper element portion respectively provided below and above the plane in which the fastener tape exists, the lower element portion having at least one engaging portion and at least one engaged portion, and a slider which moves forward on the center line of the slide fastener to alternately engage the individual fastener elements included in one of the pair of left and right fastener stringers with the individual fastener elements included in the other of the pair of left and right fastener stringers, and which moves backward on the center line of the slide fastener to disengage them.
  • each fastener element includes an upper surface extending along the width direction of the slide fastener perpendicular to the center line of the slide fastener, a front side surface extending along the width direction of the slide fastener, a rear side surface extending along the width direction of the slide fastener, a first intermediate surface extending along the width direction of the slide fastener between the upper surface and the front side surface, and a second intermediate surface extending along the width direction of the slide fastener between the upper surface and the rear side surface, and a first boundary line is defined between the upper surface and the first intermediate surface, and a second boundary line is defined between the upper surface and the second intermediate surface.
  • the upper surface, the front side surface, and the rear side surface of the element upper part of each fastener element are shaped so as not to straddle the center line of the slide fastener.
  • the closed state of the slide fastener in each of the front and rear fastener elements provided on different fastener stringers of a pair of left and right fastener stringers and adjacently engaged on the center line of the slide fastener, when a first virtual line is set that is tangent to a first boundary line at least on the core string provided on the side edge of the fastener tape and extends parallel to the width direction of the slide fastener, and a second virtual line is set that is tangent to a second boundary line at least on the core string provided on the side edge of the fastener tape and extends parallel to the width direction of the slide fastener, the upper part of the fastener element is shaped so that the first virtual line of the rear fastener element and the second virtual line of the front fastener element
  • a slide fastener comprises a pair of left and right fastener stringers, each of which includes a fastener tape and a plurality of fastener elements attached to a side edge of the fastener tape at a predetermined pitch, each of which includes a lower element portion and an upper element portion respectively provided below and above the plane in which the fastener tape exists, the lower element portion having at least one engaging portion and at least one engaged portion, and a slider which moves forward on the center line of the slide fastener to alternately engage the individual fastener elements included in one of the pair of left and right fastener stringers with the individual fastener elements included in the other of the pair of left and right fastener stringers, and which moves backward on the center line of the slide fastener to disengage them.
  • each fastener element includes an upper surface extending along the width direction of the slide fastener perpendicular to the center line of the slide fastener, a front side surface extending along the width direction of the slide fastener, a rear side surface extending along the width direction of the slide fastener, a first intermediate surface extending along the width direction of the slide fastener between the upper surface and the front side surface, and a second intermediate surface extending along the width direction of the slide fastener between the upper surface and the rear side surface, and a first boundary line is defined between the upper surface and the first intermediate surface, and a second boundary line is defined between the upper surface and the second intermediate surface.
  • the element upper part of the fastener element has an upper base end surface located on the tape surface of the fastener tape, and an upper tip surface located outside the tape surface of the fastener tape.
  • the upper tip surface of each fastener element included in one of the pair of left and right fastener stringers and the upper tip surface of each fastener element included in the other of the pair of left and right fastener stringers are alternately arranged on both sides of the center line of the slide fastener.
  • any of the above-mentioned aspects may further include one or more of the following features or any combination thereof. Needless to say, it is also possible to grasp a new embodiment by replacing some features of any of the above-mentioned aspects with any of the following features. [1] In the closed state of the slide fastener, the second imaginary line of the front fastener element extends coincident with or adjacent to a third boundary line between the front side surface of the rear fastener element and the first intermediate surface.
  • the width of the upper surface of the element upper part of the fastener element determined between the first virtual line and the second virtual line falls within a range determined by a lower limit value obtained by multiplying 1/2 of the width of the element upper part determined from the lower edge of the front side surface that is in contact with the fastener tape and extends along the width direction of the slide fastener and the lower edge of the rear side surface that is in contact with the fastener tape and extends along the width direction of the slide fastener, by 0.8 and an upper limit value obtained by multiplying 1/2 of that value by 1.2.
  • a third boundary line is defined between the front side surface and the first intermediate surface, and a fourth boundary line is defined between the rear side surface and the second intermediate surface, and the first to fourth boundary lines are oriented approximately parallel to each other at least across the entire width of the core cord provided at the side edge portion of the fastener tape.
  • the gap is less than 1/3 of the distance between the first imaginary line and the second imaginary line in one of the front and rear fastener elements, and/or the gap is more than 1/5 of the distance between the first imaginary line and the second imaginary line.
  • each fastener element further includes a first intermediate surface extending along the width direction of the slide fastener between the upper surface and the front side surface, and a second intermediate surface extending along the width direction of the slide fastener between the upper surface and the rear side surface, the first intermediate surface being a curved surface extending downward while curving from a first boundary line between the upper surface and the first intermediate surface to a third boundary line between the first intermediate surface and the front side surface, and the second intermediate surface being a curved surface extending downward while curving from a second boundary line between the upper surface and the second intermediate surface to a fourth boundary line between the second intermediate surface and the rear side surface.
  • each fastener element may be wider away from the top surface due to the slope of the front and rear sides, for example resulting in a tapered shape.
  • the front and rear sides each form an angle within the range of 75° to 85° with respect to the upper tape surface of the fastener tape.
  • each fastener element has an upper base end surface located on the tape surface of the fastener tape and an upper tip surface located outside the tape surface of the fastener tape, and when the slide fastener is in a closed state, the upper tip surfaces of each fastener element included in one of the pair of left and right fastener stringers and the upper tip surfaces of each fastener element included in the other of the pair of left and right fastener stringers are alternately arranged on both sides of the center line of the slide fastener.
  • each fastener element has an upper base end surface located on the tape surface of the fastener tape and an upper tip surface located outside the tape surface of the fastener tape, and when the upper tip surface of the front fastener element of the front and rear fastener elements and the upper tip surface of the rear fastener element of the front and rear fastener elements are moved parallel to a common plane along the center line of the slide fastener in a closed state, the upper tip surface of the front fastener element and the upper tip surface of the rear fastener element form at least a part of the equal sides of an isosceles triangle with an acute apex angle.
  • Each fastener element has an element center line parallel to the width direction of the slide fastener, and the element upper and element lower portions of each fastener element are provided on the element center line and are shaped symmetrically with respect to the element center line.
  • the upper surface of the upper portion of each fastener element has an elongated rectangular contour along an element center line parallel to the width direction of the slide fastener.
  • the upper part of the element is a generally rectangular parallelepiped portion that is elongated between the upper base end face and the upper tip face along the element center line that is parallel to the width direction of the slide fastener, and the lower part of the element is elongated between the lower base end face and the lower tip face along the element center line.
  • the upper part of the element further includes a first intermediate surface extending along the width direction of the slide fastener between the upper surface and the front side surface, and a second intermediate surface extending along the width direction of the slide fastener between the upper surface and the rear side surface, and in each fastener stringer of the pair of left and right fastener stringers, the upper tip surface of the upper part of the fastener element is offset closer to the side edge of the fastener tape than the lower tip surface, and an intermediate surface is formed between the lower tip surface and the upper tip surface.
  • the angle between the upper tip surface and the intermediate surface is equal to an angle in the range between 90° and 100°.
  • the lower element portion includes a base portion having a lower proximal surface, a head portion having a lower distal surface, and a neck portion narrowed to provide a minimum element width between the base portion and the head portion.
  • the upper tip surface is positioned outward of the fastener tape along the element center line from the position of the minimum element width at the neck portion; and/or in each fastener element of each fastener stringer of a pair of left and right fastener stringers, the upper tip surface is positioned closer to the position of the minimum element width at the neck portion than the lower tip surface or its most distal end position in the direction along the element center line.
  • each fastener element has an upper base end surface located on the tape surface of the fastener tape and an upper tip surface located opposite the upper base end surface, and the upper surface of the upper portion of the element is composed of a total of three regions: a main region, a first inclined region that gradually inclines at a first predetermined angle between the main region and the upper end of the upper base end surface, and a second inclined region that gradually inclines at a second predetermined angle between the main region and the upper end of the upper tip surface.
  • FIG. 1 is a schematic top view of a slide fastener according to one embodiment of the present disclosure.
  • FIG. 2 is a schematic partial perspective view of a slide fastener, with the slider not shown.
  • FIG. 2 is a schematic top view of a slide fastener, showing a schematic state in which left and right fastener elements are engaged with each other.
  • FIG. 2 is a left side view of the slide fastener when the slide fastener is in a closed state, with the positions of a first imaginary line DL1 and a second imaginary line DL2 indicated by arrows.
  • 4 is a schematic partial cross-sectional view of the slide fastener taken along the dashed line IV-IV in FIG. 3.
  • FIG. 3 is a schematic partial cross-sectional view of the slide fastener taken along the dashed line IV-IV in FIG. 3.
  • FIG. 2 is a schematic perspective view of a fastener element attached to a side edge of a fastener tape.
  • 1 is a schematic top view of two adjacent fastener elements attached to a side edge of a fastener tape.
  • FIG. 2 is a schematic bottom view of two adjacent fastener elements attached to a side edge of a fastener tape.
  • FIG. 1 is a schematic side view of two adjacent fastener elements attached to the side edges of a fastener tape, showing the upper tip surface of the upper element and the lower tip surface of the lower element above and below the mid-plane.
  • the terms used to indicate the slide fastener reference directions are the front-rear direction, the left-right direction, and the up-down direction, which are mutually orthogonal.
  • the terms used to indicate the fastener tape reference directions are the tape width direction, the tape length direction, and the tape thickness direction, which are mutually orthogonal.
  • the terms used to indicate the fastener element reference directions are the element centerline, the element width direction, and the element thickness direction, which are mutually orthogonal.
  • the front-rear direction, the tape length direction, and the element width direction mean the same direction or are parallel to each other.
  • the left-right direction, the tape width direction, and the element centerline mean the same direction or are parallel to each other.
  • the up-down direction, the tape thickness direction, and the element thickness direction mean the same direction or are parallel to each other.
  • the front-to-rear direction corresponds to the direction of movement of the slider 9 for opening and closing the slide fastener 1, and coincides with the longitudinal direction of the slide fastener 1.
  • the left-to-right direction is a direction perpendicular to the front-to-rear direction, and corresponds to the width direction of the slide fastener 1.
  • the up-to-down direction is a direction perpendicular to the front-to-rear and left-to-right directions. Of course, the up-to-down direction does not have to correspond to the vertical direction (direction of gravity). In other words, the terms indicating directions referred to in this specification are unrelated to the vertical direction (direction of gravity).
  • Figure 1 is a schematic top view of the slide fastener 1.
  • Figure 2 is a schematic partial perspective view of the slide fastener 1, with the slider 9 omitted.
  • Figure 3 is a schematic top view of the slide fastener 1, and shows the engagement state of the left and right fastener elements 4, 4'.
  • Figure 4 is a left side view of the slide fastener 1 when the slide fastener 1 is in a closed state.
  • each fastener element 4 included in one of the pair of left and right fastener stringers 2, 2' and the upper end surface 65' of each fastener element 4' included in the other of the pair of left and right fastener stringers 2, 2' are alternately arranged on both sides of the center line CL of the slide fastener 1.
  • Figure 5 is a schematic partial cross-sectional view of the slide fastener 1 along the dashed line IV-IV in Figure 3.
  • Figure 6 is a schematic perspective view of the fastener element 4 attached to the side edge portion 31 of the fastener tape 3, 3'.
  • FIG. 7 is a schematic top view of two adjacent fastener elements attached to the side edge 31 of the fastener tape 3, 3'.
  • FIG. 8 is a schematic bottom view of two adjacent fastener elements 4 attached to the side edge 31 of the fastener tape 3, 3'.
  • FIG. 9 is a schematic side view of two adjacent fastener elements 4 attached to the side edge 31 of the fastener tape 3, 3', showing the upper tip surface 65 of the element upper part 6 and the lower tip surface 55 of the element lower part 5 above and below the intermediate surface 7, 7' described below.
  • FIG. 10 is a schematic side view of two adjacent fastener elements 4 attached to the side edge 31 of the fastener tape 3, 3' (however, the right element is a cross-sectional view), showing the upper base end surface 64 of the element upper part 6 and the lower base end surfaces 54, 54' of the element lower part 5 above and below the fastener tape 3, 3'.
  • the slide fastener 1 is typically a flexible, elongated member that extends in the front-rear direction with a substantially constant left-right width.
  • the slide fastener 1 has a pair of left and right fastener stringers 2, 2' and a slider 9.
  • the slider 9 advances on the center line CL of the slide fastener 1 to alternately engage the individual fastener elements 4 included in one of the pair of left and right fastener stringers 2, 2' with the individual fastener elements 4' included in the other of the pair of left and right fastener stringers 2, 2', and moves backward on the center line CL of the slide fastener 1 to disengage them.
  • a slider of a general structure can be used as the slider 9.
  • the slider 9 has upper wing plates on the element upper part 6, 6' side of the fastener elements 4, 4' described below, lower wing plates on the element lower part 5, 5' side, and connecting columns that connect the upper wing plates and the lower wing plates.
  • the connecting columns disengage the engaged left and right fastener elements 4, 4'.
  • the connecting posts of the slider 9 are provided to guide the movement of the lower element parts 5, 5' during both the engagement and disengagement processes of the fastener elements 4, 4'. During both the engagement and disengagement processes of the fastener elements 4, 4', it is optional whether the upper element parts 6, 6' contact the connecting posts of the slider 9 or not, and there may be a gap between them.
  • the left and right fastener stringers 2, 2' are identical in configuration (or are mirror images except for the fact that the arrangement of the fastener elements 4, 4' is offset in the front-to-rear direction by half a pitch (Pi/2) for the engagement between the fastener elements 4, 4'). Therefore, the explanation given for the left fastener stringer 2 also applies to the right fastener stringer 2'. Elements of the right fastener stringer 2' that correspond to elements of the left fastener stringer 2 are referred to by the same Arabic numerals as those assigned to the elements of the left fastener stringer 2, followed by a colon.
  • the fastener stringer 2, 2' includes a fastener tape 3, 3' and a plurality of fastener elements 4, 4' attached to the side edge portion 31, 31' of the fastener tape 3, 3' (typically, a core string 33, 33' provided thereon) at a predetermined pitch Pi.
  • the fastener tape 3, 3' has a tape length LN3 larger than the tape width W3.
  • the fastener elements 4, 4' are individually attached to the side edge portion 31, 31' of the fastener tape 3, 3' at a predetermined pitch Pi along the tape length direction of the fastener tape 3, 3'.
  • the fastener tape 3, 3' is a woven fabric, a knitted fabric, or a mixture of these, and has high flexibility.
  • the fastener elements 4, 4' are resin elements attached to the side edge portion 31, 31' of the fastener tape 3, 3' by injection molding.
  • Examples of materials for the fastener elements 4, 4' include nylon, polyacetal, polyamide, polypropylene, polybutylene terephthalate, polycarbonate, etc., but other materials can also be used.
  • the fastener tape 3, 3' has an upper tape surface 36, 36' and a lower tape surface 37, 37' as tape surfaces, and has a substantially constant tape thickness defined by these.
  • the upper tape surface 36, 36' and the lower tape surface 37, 37' of the fastener tape 3, 3' are non-flat surfaces having irregularities according to the tape weaving or knitting structure, but can be considered as two-dimensional planes.
  • the fastener tape 3, 3' can be divided into side edge portions 31, 31' to which the fastener elements 4, 4' are attached, and the remaining tape main body portion 32, 32'.
  • a core string 33, 33' can be provided on the side edge portions 31, 31'.
  • the core string 33, 33' extends in a long length along the side edge portions 31, 31'.
  • the core cord 33, 33' includes an upper core cord portion that protrudes upward from the upper tape surface 36, 36' of the fastener tape 3, 3', and a lower core cord portion that protrudes downward from the lower tape surface 37, 37' of the fastener tape 3, 3'. It is also possible to omit one of the upper core cord portion and the lower core cord portion.
  • the fastener element 4, 4' includes a lower element portion 5, 5' and an upper element portion 6, 6'.
  • the lower element portion 5, 5' and the upper element portion 6, 6' are respectively provided below and above the plane on which the fastener tape 3, 3' exists.
  • the upper element portion 6, 6' may be a substantially rectangular parallelepiped portion.
  • the lower element portion 5, 5' may have at least one engaging portion 58 and at least one engaged portion 59.
  • the side edge portion 31, 31' and/or the core string 33, 33' of the fastener tape 3, 3' are sandwiched between the lower element portion 5, 5' and the upper element portion 6, 6' in the element thickness direction.
  • the lower element portion 5, 5' includes a portion that contacts and adheres to the tape lower surface 37, 37' of the fastener tape 3, 3'.
  • the upper element portion 6, 6' includes a portion that contacts and adheres to the tape upper surface 36, 36' of the fastener tape 3, 3'. Outside the tape surface of the fastener tapes 3, 3', the lower element parts 5, 5' and the upper element parts 6, 6' are directly bonded and laminated.
  • the fastener elements 4, 4' have an element center line CX that is parallel to the tape width of the fastener tapes 3, 3'.
  • the element center line CX is parallel to the width direction of the slide fastener 1 and is positioned at the center of the fastener elements 4, 4' in the width direction.
  • the element upper parts 6, 6' are shorter than the element lower parts 5, 5'.
  • the length L6 of the element upper parts 6, 6' is greater than 2/3 of the length L5 of the element lower parts 5, 5' and less than 4/5 of the length L5 of the element lower parts 5, 5'.
  • the upper element portion 6, 6' may be a substantially rectangular parallelepiped portion elongated (the element width is smaller than the element length) between the upper base end surface 64, 64' and the upper tip surface 65, 65' along the element center line CX.
  • the lower element portion 5, 5' may be elongated between the lower base end surface 54, 54' and the lower tip surface 55, 55' along the element center line CX. This allows the fastener element 4, 4' to be elongated as a whole, and to have an appearance similar to that of a metal element.
  • the upper base end surface 64, 64' is located on the tape upper surface 36, 36' of the fastener tape 3, 3'.
  • the upper tip surface 65, 65' is located outside the tape surface of the fastener tape 3, 3'.
  • the lower base end surface 54, 54' is located on the tape lower surface 37, 37' of the fastener tape 3, 3'.
  • the lower tip surface 55, 55' is located outside the tape surface of the fastener tape 3, 3'.
  • Each element upper portion 6, 6' includes a single elongated portion including an upper surface 61, 61' extending along the width direction of the slide fastener 1 (e.g., the element center line CX) perpendicular to the center line CL of the slide fastener 1, a front side surface 62, 62' extending along the width direction of the slide fastener 1 (e.g., the element center line CX), and a rear side surface 63, 63' extending along the width direction of the slide fastener 1 (e.g., the element center line CX) (in an exemplary embodiment, it is made up of the single elongated portion).
  • each element upper portion 6, 6' is provided on the element center line CX and extends along the element center line CX, and this point is also the same for the single elongated portion.
  • each element upper portion 6, 6' further includes a first intermediate surface 66, 66' extending along the width direction of the slide fastener 1 (e.g., element center line CX) between the upper surface 61, 61' and the front side surface 62, 62', and a second intermediate surface 67, 67' extending along the width direction of the slide fastener 1 (e.g., element center line CX) between the upper surface 61, 61' and the rear side surface 63, 63'.
  • first intermediate surface 66, 66' extending along the width direction of the slide fastener 1 (e.g., element center line CX) between the upper surface 61, 61' and the front side surface 62, 62'
  • a second intermediate surface 67, 67' extending along the width direction of the slide fastener 1
  • the fastener elements 4, 4' can be made to appear thinner when viewed from above (e.g., see Figures 1 and 3).
  • the single elongated portion may be the above-mentioned substantially rectangular parallelepiped portion.
  • a first boundary line L1 is defined between the upper surface 61, 61' and the first intermediate surface 66, 66'
  • a second boundary line L2 is defined between the upper surface 61, 61' and the second intermediate surface 67, 67'
  • a third boundary line L3 is defined between the front side surface 62, 62' and the first intermediate surface 66, 66'
  • a fourth boundary line L4 is defined between the rear side surface 63, 63' and the second intermediate surface 67, 67' (see FIG. 3).
  • the first intermediate surface 66, 66' may be a curved surface that extends downward while curving (e.g., with a constant or changing curvature and/or in an arc) from the first boundary line L1 between the upper surface 61, 61' and the first intermediate surface 66, 66' to the third boundary line L3 between the first intermediate surface 66, 66' and the front side surface 62, 62', but is not limited thereto and may be a flat inclined surface.
  • the second intermediate surface 67, 67' is a curved surface that extends downward while curving (e.g., with a constant or varying curvature and/or in an arc) from the second boundary line L2 between the upper surface 61, 61' and the second intermediate surface 67, 67' to the fourth boundary line L4 between the second intermediate surface 67, 67' and the rear side surface 63, 63', but is not limited to this and may be a flat inclined surface.
  • the first and second intermediate surfaces 66, 66', 67, 67' are curved surfaces with a constant curvature and can be easily distinguished from the upper surface 61, 61', which is observed to be substantially flat.
  • the upper surface 61, 61' is not a completely flat surface, and may curve slightly as it moves away from the element center line CX, but the curvature is extremely small compared to the curvature of the first intermediate surface 66 (for example, 1/10 or less). In this way, a first boundary line L1 can be defined between the first intermediate surface 66 and the upper surface 61, 61'.
  • the front side surface 62 and the rear side surface 63 are inclined surfaces with a constant inclination, i.e., non-curved surfaces, as shown in FIG. 4. Therefore, the boundary between the first intermediate surface 66 and the front side surface 62 can be set at the curvature start point of the first intermediate surface 66. Similarly, the boundary between the second intermediate surface 67 and the rear side surface 63 can be set at the curvature start point of the second intermediate surface 67.
  • the first to fourth boundary lines L1, L2, L3, and L4 are oriented approximately parallel to each other at least across the entire width of the core cord 33 provided on the side edge portions 31, 31' of the fastener tapes 3, 3' (or across the main region 61a of the upper surface 61 of the element upper portion 6 described below). This may be a consequence of the upper surfaces 61, 61', the front side surfaces 62, 62', the rear side surfaces 63, 63', and the first and second intermediate surfaces 66, 66', 67, 67' extending parallel to each other in the same direction.
  • the distance between the first boundary line L1 and the second boundary line L2 may increase slightly as it approaches the upper base end surface 64.
  • the distance between the third boundary line L3 and the fourth boundary line L4 may increase slightly as it approaches the upper base end surface 64, 64'.
  • the distance between the first boundary line L1 and the second boundary line L2 may increase slightly as it approaches the upper tip surface 65, 65'.
  • the second boundary line L2 and/or the fourth boundary line L4 may each include a slanted line that slopes rearward as it approaches the upper base end surface 64, 64' or the upper tip surface 65, 65'.
  • the element upper part 6 has an elongated rectangular outline along the element center line CX (when viewed from above).
  • the upper surface 61 of the element upper part 6 also has an elongated rectangular outline along the element center line CX (when viewed from above). Due to the elongated shape of the element upper part 6 and upper surface 61, the fastener element 4 appears to be a metal element, even though it is actually a plastic element.
  • the element upper parts 6, 6' of the fastener elements 4, 4' are shaped so as not to straddle (in other words, not to cross) the center line CL of the slide fastener 1.
  • the element upper parts 6, 6' of the fastener elements 4, 4' are shaped so that the upper surfaces 61, 61', the front side surfaces 62, 62', the rear side surfaces 63, 63', and the upper tip surfaces 65, 65' do not straddle (in other words, not to cross) the center line CL of the slide fastener 1.
  • the appearance of the fastener elements 4, 4' can be made to resemble a metal element using a motif of a metal element, although it has a different shape from the metal element, rather than being faithful to the shape of the metal element.
  • narrowing the fastener elements 4, 4' reduces the pitch Pi of the fastener elements 4, 4', and can also reduce the sliding resistance of the slider 9 for opening and closing the slide fastener 1. In other words, it is easier to open and close the slide fastener 1 by moving the slider 9 with less force.
  • the element upper parts 6, 6' are arranged in a zigzag pattern on both sides of the center line CL of the slide fastener 1.
  • the upper surface 61 of the element upper part 6 of the left fastener element 4 and the upper surface 61 of the element upper part 6' of the right fastener element 4' are arranged in a zigzag pattern on both sides of the center line CL of the slide fastener 1.
  • the element upper parts 6, 6' have portions that face each other in the width direction of the slide fastener 1, so that even if the slide fastener 1 is twisted, interference between the element upper parts 6, 6' prevents the fastener elements 4, 4' from becoming disengaged.
  • the first virtual line DL1 is located at a position where a line parallel to the width direction of the slide fastener 1 is in contact with the first boundary line L1 (inscribed with respect to the fastener elements 4, 4') when moved forward in parallel from the element center line CX.
  • the second virtual line DL2 is located at a position where a line parallel to the width direction of the slide fastener 1 is in contact with the second boundary line L2 (inscribed with respect to the fastener elements 4, 4') when moved backward in parallel from the element center line CX.
  • the third and fourth virtual lines can be set in the same manner for the third and fourth boundary lines L3, L4.
  • the second imaginary line DL2 of the front fastener element E1 extends coincident with or adjacent to the third boundary line L3, L3' between the front side surface 62, 62' and the first intermediate surface 66, 66' of the rear fastener element E2. This ensures an appropriate width for the upper surfaces 61, 61' of the left and right element upper parts 6, 6'.
  • the width W61 of the upper surface 61, 61' of the element upper portion 6, 6' of the fastener element 4, 4' determined between the first virtual line DL1 and the second virtual line DL2 falls within a range determined by a lower limit value obtained by multiplying 1/2 the width W6 of the element upper portion 6, 6' determined by the lower side of the front side surface 62, 62' that contacts the fastener tape 3, 3' and extends along the width direction of the slide fastener 1 and the lower side of the rear side surface 63, 63' that contacts the fastener tape 3, 3' and extends along the width direction of the slide fastener 1, by 0.8, and an upper limit value obtained by multiplying 1/2 the width W6 by 1.2.
  • the widths of the upper surfaces 61, 61' of the left and right element upper portions 6, 6' are made extremely small, the appearance of the fastener element 4, 4' will become far removed from and will no longer resemble a metal element.
  • the width W6 of the element upper portion 6 is 1.3 mm or more.
  • the length L6 of the upper part 6 of the element is 2.9 mm or more.
  • the width of the top surface 61 of the element upper portion 6 of the left fastener element 4 can be understood to be defined by the first imaginary line DL1 and the second imaginary line DL2, but can also be understood to be defined between the first boundary line L1 and the second boundary line L2. Note that due to the inclination of the front side surface 62 and the rear side surface 63 of each element upper portion 6, the width of the top surface 61 of the element upper portion 6 is smaller than the width of the element upper portion 6 in the same direction.
  • the above-mentioned gap SP may be 1/3 or less of the distance between the first virtual line DL1 and the second virtual line DL2 in one fastener element of the front and rear fastener elements E1, E2, and/or may be 1/5 or more of the distance between the first virtual line DL1 and the second virtual line DL2.
  • the upper surfaces 61, 61' can be made to an appropriate width.
  • the width W6 of the element upper portion 6 and the height H6 of the element upper portion 6 can satisfy 0.8 ⁇ (H6/W6) ⁇ 0.95.
  • the attachment strength of the fastener element 4 to the fastener tapes 3, 3' may be reduced by narrowing the width of the element upper portion 6, the reduction in attachment strength can be compensated for by increasing the height H6 relative to the width W6.
  • the height H6 is equal to the distance from the tape upper surface 36, 36' of the fastener tapes 3, 3' or a plane including this to the upper surface 61 of the element upper portion 6 (for example, the main region 61a described below).
  • the fastener element disclosed in Patent Document 1 is designed under the condition of (H6/W6) ⁇ 0.8 in order to suppress the degree of its protrusion.
  • the above-mentioned front side surface 62, 62' and rear side surface 63, 63' are preferably inclined surfaces rather than perpendicular to the tape upper surface 36, 36' of the fastener tape 3, 3'.
  • the front side surface 62, 62' is a downwardly inclined surface that approaches the tape upper surface 36, 36' of the fastener tape 3, 3' as it extends forward from the upper surface 61, 61'.
  • the rear side surface 63, 63' is a downwardly inclined surface that approaches the tape upper surface 36, 36' of the fastener tape 3, 3' as it extends rearward from the upper surface 61, 61'.
  • the front side surface 62, 62' and rear side surface 63, 63' each form an angle within the range of 75° to 85° with respect to the tape upper surface 36, 36' of the fastener tape 3, 3'.
  • the upper portion 6, 6' of each fastener element 4, 4' becomes wider as it moves away from the upper surface 61, 61'.
  • each upper portion 6, 6' of the element has a tapered shape.
  • the rear side 63 of the front fastener element 4 and the front side 62' of the rear fastener element 4 form at least a part of the equilateral sides of an isosceles triangle RC with an acute apex angle.
  • the oblique line including the rear side 63 of the front fastener element 4 and the oblique line including the front side 62' of the rear fastener element 4' moved parallel to a common plane form the equilateral sides of an isosceles triangle RC with an acute apex angle.
  • the symmetry of the left and right fastener elements 4, 4' (with respect to the center line CL of the slide fastener 1) is enhanced.
  • the oblique line including the upper end surface 65 of the front fastener element 4 moved parallel to a common plane and the oblique line including the upper end surface 65' of the rear fastener element 4' form the equilateral sides of an isosceles triangle RC1 with an acute apex angle.
  • the symmetry of the left and right fastener elements 4, 4' (with respect to the center line CL of the slide fastener 1) is enhanced.
  • the isosceles triangle RC shown in FIG. 4 and the isosceles triangle RC1 shown in FIG. 5 have an apex angle that faces upwards, while the apex angle of the isosceles triangle RC faces downwards.
  • the apex angle of the isosceles triangle RC is preferably in the range of 10° to 40°, and more preferably in the range of 15° to 30°.
  • the apex angle of the isosceles triangle RC1 is preferably in the range of 5° to 20°, and more preferably in the range of 7° to 13°.
  • the element upper part 6, 6' is a block-shaped part provided above the fastener tapes 3, 3', and has an upper surface 61, 61', a front side surface 62, 62', a rear side surface 63, 63', an upper base end surface 64, 64', and an upper tip surface 65, 65'.
  • the element upper part 6, 6' is typically configured not to engage with the element upper part 6, 6' of the fastener element 4, 4' that is the engaging partner of the fastener element 4, 4' including this element upper part 6, 6' (i.e., it does not include an engaging structure (e.g., a pair of one or more engaging parts and one or more engaged parts)).
  • the engaging function of the fastener element 4, 4' can be ensured solely by the element lower part 5, 5'.
  • the front side 62, 62', rear side 63, 63', upper base end surface 64, 64', and upper tip surface 65, 65' are each one of the side surfaces of the element upper portion 6, 6'.
  • the front side 62, 62' and rear side 63, 63' extend parallel to the side edge portion 31, 31' of the fastener tape 3, 3' so as to be perpendicular or nearly perpendicular to the side edge portion 31, 31' of the fastener tape 3, 3'. More specifically, the front side 62, 62' and rear side 63, 63' extend between the upper base end surface 64, 64' and the upper tip surface 65, 65' along the element center line CX.
  • the upper base end surface 64, 64' is on the tape surface of the fastener tape 3, 3', and more specifically, stands upward from the tape upper surface 36, 36' of the fastener tape 3, 3'.
  • the upper tip surface 65, 65' is outside the tape surface of the fastener tape 3, 3', and specifically, it stands upward from the intermediate surface 7, 7' described below.
  • the upper tip surface 65, 65' is located outside the tape surface of the fastener tape 3, 3' when viewed from the upper base end surface 64, 64', and specifically, it is located away from the upper base end surface 64, 64' beyond the side edge portion 31 of the fastener tape 3, 3' and outside the tape surface of the fastener tape 3, 3'.
  • the corners of the joining points of each side surface are chamfered and rounded.
  • the tape outside means, for a certain fastener stringer, the direction from a position on the tape surface of the fastener tape to a position outside the tape surface, and typically perpendicular to the side edge portion (or core string) of the fastener tape.
  • the upper surface 61, 61' may have an elongated rectangular contour along the element center line CX as described above. Additionally or alternatively, when the width of the upper surface 61, 61' is W61 and the length of the upper surface 61, 61' is L61 (see FIG. 7), 1.7 ⁇ L61/W61 ⁇ 2.3 may be satisfied.
  • the first intermediate surface 66, 66' and the second intermediate surface 67, 67' (if these are omitted, the front side surface 62, 62' and the rear side surface 63, 63') are individually connected to the two long sides included in the rectangular contour of the upper surface 61, 61'.
  • the upper base end surface 64, 64' and the upper tip surface 65, 65' are individually connected to the two short sides included in the rectangular contour of the upper surface 61, 61'.
  • the corners of the connection points between the upper surface 61, 61' and each of the above-mentioned surfaces are chamfered and rounded. Due to the inclination of the front side surface 62, the rear side surfaces 63, 63', the upper base end surface 64, and the upper tip surface 65, the upper surface 61 can be an area that is smaller than the top view shape (contour) of the upper element surface 6.
  • the front side surfaces 62, 62' and the rear side surfaces 63, 63' are inclined away from the element center line CX as they extend downward from the top surfaces 61, 61' (or the first intermediate surfaces 66, 66'), and the rear side surfaces 63, 63' are inclined away from the element center line CX as they extend downward from the top surfaces 61, 61' (or the second intermediate surfaces 67, 67') (see Figures 9 and 10).
  • the element upper portions 6, 6' are shaped like a trapezoid when viewed in a direction along the element center line CX.
  • the top surfaces 61, 61' coincide with the upper base of the trapezoid.
  • the upper base end surface 64, 64' may be inclined away from the upper tip surface 65, 65' as it extends downward from the upper surface 61, 61', and the upper tip surface 65, 65' may be inclined away from the upper base end surface 64, 64' as it extends downward from the upper surface 61, 61' (see FIG. 5).
  • the angle ⁇ 64 (see FIG. 5) between the plane and the upper base end surface 64 is preferably larger than the angle ⁇ 62 (see FIG. 10) between the plane and the front side surface 62 and larger than the angle ⁇ 63 (see FIG. 10) between the plane and the rear side surface 63, 63'.
  • the upper surface 61, 61' of the element upper portion 6, 6' may be composed of a two-dimensional single surface or two-dimensionally continuous multiple surfaces.
  • the upper surface 61, 61' may be composed of a total of three regions, a main region 61a, a first inclined region 61b, and a second inclined region 61c, as shown in Fig. 4 (see Fig. 5).
  • the first inclined region 61b is gently inclined at a first predetermined angle ⁇ 61b between the main region 61a and the upper end of the upper base end surface 64.
  • the second inclined region 61c is gently inclined at a second predetermined angle ⁇ 61c between the main region 61a and the upper end of the upper tip surface 65.
  • the main region 61a may be a flat surface oriented parallel to the tape upper surface 36, 36' of the fastener tape 3, 3' or a plane including the tape upper surface 36, 36'.
  • the first predetermined angle ⁇ 61b may be an angle between the plane on which the main region 61a exists and the first inclined region 61b.
  • the second predetermined angle ⁇ 61c may be an angle between the plane on which the main region 61a exists and the second inclined region 61c.
  • the second predetermined angle ⁇ 61c is smaller than the first predetermined angle ⁇ 61b . This makes it easier to provide the upper end surface 65 with a sufficient height, and for example, when the slide fastener 1 is twisted, the element upper portions 6, 6' interfere with each other, suppressing the disengagement of the fastener elements 4, 4'.
  • the upper base end surface 64 extends steeply upward between positions P1 and P2.
  • the upper surface 61 extends between positions P2 and P5.
  • the first inclined region 61b slopes gently upward from position P2 to position P3.
  • the main region 61a extends horizontally between positions P3 and P4.
  • the second inclined region 61c slopes gently downward from position P4 to position P5.
  • the upper tip surface 65 extends steeply downward between positions P5 and P6.
  • the distance between positions P1 and P2 and the distance between positions P5 and P6 are both sufficiently smaller than the distance between positions P2 and P5.
  • the element lower portion 5, 5' is shaped to be elongated between the lower base end surface 54, 54' and the lower tip surface 55, 55' along the element center line CX, and to have at least one engaging portion 58 and at least one engaged portion 59 between the lower base end surface 54, 54' and the lower tip surface 55, 55'.
  • the element lower portion 5 is typically configured to engage with each of the element lower portions 5', 5' of the two fastener elements 4', 4' that are engaged with the fastener element 4 including this element lower portion 5.
  • the engaging portion 58 and the engaged portion 59 are appropriately shaped.
  • the engaging portion 58 typically protrudes along the center line CL of the slide fastener 1 or an axis parallel thereto.
  • the engaged portion 59 is typically recessed along the center line CL of the slide fastener 1 or an axis parallel thereto.
  • the lower base end surface 54, 54' rises downward from the tape underside surface 37 of the fastener tape 3, 3'.
  • the lower tip surface 55, 55' is located beyond the side edge portion 31 of the fastener tape 3, 3' and away from the lower base end surface 54, 54' toward the outside of the fastener tape 3, 3' (i.e., outside the tape surface of the fastener tape 3, 3').
  • the lower tip surface 55, 55' may be the curved surface that protrudes most on the element center axis CX of the fastener element 4.
  • the lower tip surface 55, 55' slopes steeply downward from position P8 toward position P7 as shown in FIG. 5.
  • the lower tip surface 55, 55' may include a gently curved surface in the vicinity of position P7.
  • the upper end surface 65 is offset closer to the side edge 31 (or core string 33) of the fastener tape 3, 3' than the lower end surface 55, 55', and an intermediate surface 7, 7' is formed between the lower end surface 55, 55' and the upper end surface 65.
  • the narrow width of the element upper portion 6, 6' ensures that the appearance of the fastener element 4 resembles a metallic element. In this way, it is possible to provide a narrow fastener element 4 similar to a metallic element, with a metallic element motif.
  • the intermediate surfaces 7, 7' may be flat surfaces perpendicular to the element thickness direction, and may be, but are not limited to, flush with the fastener tapes 3, 3'.
  • the intermediate surfaces 7, 7' are flush with the tape upper surfaces 36, 36' of the fastener tapes 3, 3', or are in a plane closer to the tape upper surfaces 36, 36' than the tape lower surfaces 37 of the fastener tapes 3, 3'.
  • the thickness of the element lower parts 5, 5' below the intermediate surfaces 7, 7' can be sufficiently secured, and the engagement strength between the fastener elements 4, 4' can be increased.
  • the angle ⁇ 1 between the upper tip surface 65 and the intermediate surfaces 7, 7' is equal to an angle in the range between 90° and 100° (see FIG. 5).
  • the angle ⁇ 55 between the lower tip surface 55, 55' and the intermediate surfaces 7, 7' is equal to an angle in the range between 80° and 90° (see FIG. 5).
  • the intermediate surfaces 7, 7' can also be inclined or non-flat.
  • the top view shape of the intermediate surfaces 7, 7' may depend on the engagement structure of the lower element portions 5, 5'.
  • the width of the intermediate surfaces 7, 7' increases and then decreases as they move away from the upper end surface 65 along the element centerline CX; and/or the intermediate surfaces 7, 7' have a circular contour with an arc cut off by the upper end surface 65.
  • the intermediate surface 7 of the fastener element 4 may include two mounting areas 71 on which the upper element portions 6', 6' (e.g., shoulder portions 8 described below) of the two mating fastener elements 4', 4' are individually mounted, and an intermediate area 72 between these two mounting areas 71.
  • the area of the intermediate area 72 may be within a range of 0.5 to 1.5 times the total area of the two mounting areas 71. The same applies to the fastener element 4'.
  • their intermediate areas 72, 72' are visible (when viewed from above). At this time, the intermediate areas 72, 72' are located at the back between the element upper portions 6, 6' (and between their upper surfaces 61, 61') and are not noticeable.
  • the element lower part 5 includes a base part 51 having a lower base end surface 54, a head part 53 having a lower tip end surface 55, and a neck part 52 that is narrowed so as to have a minimum element width between the base part 51 and the head part 53.
  • the head part 53 includes at least one engaging part 58, which are two engaging parts 58 that protrude on opposite sides in the tape length direction (see FIG. 6).
  • the neck part 52 includes at least one engaged part 59, which are two engaged parts 59 that are recessed so as to form a narrowing of the neck part 52. The same is true for the element lower part 5'.
  • the base 51 is formed to have approximately the same width as the upper element parts 6, 6'. That is, the width W51 of the base 51 is equal to the width W6 of the upper element parts 6, 6'. Therefore, the pitch Pi of the fastener element 4 can be determined based on the structure of the lower element parts 5, 5'.
  • the length of the base 51 along the element center line CX is shorter than the length L6 of the upper element parts 6, 6'.
  • the lower base end faces 54, 54' are located on the opposite side of the upper base end faces 64, 64' of the upper element parts 6, 6' across the fastener tapes 3, 3'.
  • the base 51 has two side faces 512, 513 that are arranged perpendicular to the element width direction, and both extend along the element center line CX and straddle the core string 33 (see Figure 8).
  • the neck 52 has a width W52 that is the narrowest in the lower element portion 5, 5' (see FIG. 8).
  • the head 53 has a width W53 that is the widest in the lower element portion 5, 5' other than the base 51.
  • the lower element portion 5, 5' has a width that gradually decreases from the intermediate position between the base 51 and the neck 52 (i.e., the neck start position) to the width W52 as it extends outward from the tape, and after passing the width W52, has a width that gradually increases to the width W53.
  • the neck 52 is shaped to have a constriction
  • each engaged portion 59 is shaped to have a semi-cylindrical receiving space.
  • the width of the head 53 gradually decreases from the width W53 to the width W53.
  • the lower surfaces of the base 51, neck 52, and head 53 are formed in the same plane, forming one lower surface 56 of the lower element portion 5, 5'.
  • the side surfaces of the base 51, neck 52, and head 53 are continuous to form one contour.
  • the base 51 is fixed to the core cord 33, which has a width defined between positions P11 and P12, and to a portion of the fastener tape 3, 3' adjacent to the core cord 33.
  • the two engaging portions 58 may each be separated by the element center line CX of the fastener element 4 and/or may be mirror-symmetrical about the element center line CX (i.e., each is a semi-cylindrical portion).
  • the two engaged portions 59 may each be separated by the element center line CX of the fastener element 4 and/or may be mirror-symmetrical about the element center line CX (i.e., each is a portion having a semi-cylindrical receiving space).
  • the two engaged portions 59 are at least partially closed from above by the two shoulders 8 of the upper element portions 6, 6' (see FIG. 6).
  • the shoulders 8 are arranged on both sides of the neck portion 52 when the fastener element 4 is viewed from below (see FIG. 8).
  • the left and right fastener elements 4, 4' are engaged, the head portion 53 of the fastener element 4 on one side is inserted and held between the neck portions 52' of the adjacent fastener element 4' on the other side.
  • the head portion 53 is arranged directly below the shoulder portions 8' of the fastener elements 4', and its upward displacement is restricted.
  • the shoulder portions of the fastener element 4 function as portions that restrict the displacement of the fastener element 4' that is engaged with it.
  • the shoulder portions 8 form part of the block-shaped upper element portions 6, 6' of the elements, and do not have a shape that can be distinguished as a shoulder portion (when the upper element portions 6, 6' of the elements are viewed from above).
  • the upper end surface 65 is positioned outside the fastener tape 3, 3' in the direction along the element center line CX relative to the position of the minimum element width W52 in the neck portion 52 (see Figures 5 to 8). This allows the element upper portion 6, 6' to be formed longer and/or allows the shoulder portion 8 to have a sufficient area. Additionally or alternatively, the upper end surface 65 is positioned closer to the position of the minimum element width W52 in the neck portion 52 compared to the lower end surface 55, 55' or its most distal end position in the direction along the element center line CX. That is, the length L8 shown in Figure 8 is smaller than the length L9. In this case, the length L7 of the intermediate surface 7, 7' can be sufficiently secured (see Figure 7). By increasing the length L7 of the intermediate surface 7, 7', the stability when the left and right fastener elements 4, 4' are engaged is improved.
  • the manufacturing method of the slide fastener 1 is omitted because it is obvious to those skilled in the art from the above description.
  • the cavity shape of the mold for injection molding the fastener element 4 is simplified thanks to the relatively simple shape of the upper element parts 6, 6'.
  • the inclination of the side surfaces (e.g., the front side surface 62 and the rear side surface 63) of the upper element parts 6, 6' serves as the draft angle of the fastener element 4 from the mold cavity.
  • the lower end surface 55, 55' may have a gate mark.
  • the cavity surface of the mold also has high smoothness so that the outer surface of the fastener element 4 has high smoothness.
  • Metal foil can be applied to the upper surfaces 61, 61' to increase the glossiness.
  • the first inclined region 61b and the second inclined region 61c can ensure light reflection over a wider range of angles. Please note that this also applies when no metal foil is provided.
  • Slide fastener 2 Fastener stringer 3: Fastener tape 4: Fastener element 5: Lower element 6: Upper element 7: Middle surface 8: Shoulder 9: Slider 51: Base 52: Neck 53: Head 54: Lower base end surface 55: Lower tip surface 58: Engagement portion 59: Engaged portion 61: Upper surface 61a: Main region 61b: First inclined region 61c: Second inclined region 62: Front side 63: Rear side 64: Upper base end surface 65: Upper tip surface 71: Placement region 72: Middle region

Landscapes

  • Slide Fasteners (AREA)

Abstract

A fastener element (4, 4') includes an element lower part (5, 5') and an element upper part (6, 6') respectively provided below and above a plane in which a fastener tape (3, 3') is present. The element upper part (6, 6') includes a single elongate-shaped portion that includes an upper surface (61, 61') extending along a width direction of the slide fastener (1) orthogonal to a center line (CL) of the slide fastener (1), a front side surface (62, 62') extending in the same direction, and a rear side surface (63, 63') extending in the same direction. In a closed state of the slide fastener (1), the element upper part (6, 6') of the fastener element (4, 4') is shaped so a not to straddle the center line (CL) of the slide fastener (1).

Description

スライドファスナーSlide fastener
　本開示は、スライドファスナーに関する。 This disclosure relates to a slide fastener.
　スライドファスナーのファスナーエレメントとしては金属製エレメントと樹脂製エレメントが知られており、前者は、加締め付けにより（即ち、金属の塑性変形を介して）ファスナーテープの側縁部に取り付けられ、後者は、射出成形によってファスナーテープの側縁部に取り付けられる。金属製エレメントは樹脂製エレメントと比べて高い光沢を有し、そのような外観が好まれることも多い。勿論、金属製エレメントであっても光沢がないマット調の外観が好まれる場合もある。 　Metal elements and resin elements are known as fastener elements for slide fasteners; the former are attached to the side edge of the fastener tape by tightening (i.e., through plastic deformation of the metal), while the latter are attached to the side edge of the fastener tape by injection molding. Metal elements have a higher gloss than resin elements, and this appearance is often preferred. Of course, there are also cases where a matte, non-glossy appearance is preferred even for metal elements.
　上述の点に関して、特許文献１には、金属製エレメントに似た外観の樹脂製エレメントが開示されている。金属製エレメントは、ファスナーテープに対して加締め付けられるために細幅であっても十分な取付強度を有する。他方、樹脂製エレメントは、そうではない。従って、特許文献１では、相対的に太い部分（特許文献１の図１の符号１２参照）と、先細りの部分（特許文献１の図１の符号１３参照）を設けて十分な取付強度とエレメント細幅を両立している。 In regard to the above point, Patent Document 1 discloses a resin element that looks similar to a metal element. Metal elements have sufficient attachment strength even though they are narrow because they are clamped against the fastener tape. On the other hand, resin elements do not. Therefore, Patent Document 1 achieves both sufficient attachment strength and a narrow element width by providing a relatively thick portion (see reference 12 in Figure 1 of Patent Document 1) and a tapered portion (see reference 13 in Figure 1 of Patent Document 1).
　特許文献２においても同様の樹脂製エレメントが開示されている。特許文献２では、四辺形状の面（特許文献２の図２の符号２４ａ参照）と先細りの面（特許文献２の図２の符号２４ｂ参照）が設けられている。なお、金属製エレメントとしては、特許文献２の図１９に示すもの（特許文献２では、片面金属エレメントと呼んでいる）と、特許文献２の図２０及び図２１に示すもの（特許文献２では両面金属エレメントと呼んでいる）が知られている。 Patent Document 2 also discloses a similar resin element. In Patent Document 2, a quadrilateral surface (see reference 24a in FIG. 2 of Patent Document 2) and a tapered surface (see reference 24b in FIG. 2 of Patent Document 2) are provided. Known metal elements include the one shown in FIG. 19 of Patent Document 2 (called a single-sided metal element in Patent Document 2) and the one shown in FIG. 20 and FIG. 21 of Patent Document 2 (called a double-sided metal element in Patent Document 2).
　特許文献３には、一つのファスナーエレメントに２つの分割部を設けてファスナーエレメントを細幅に見せることが開示されている。 Patent document 3 discloses that a single fastener element is provided with two divided sections to make the fastener element appear narrower.
国際公開第２０１０／０８２２９４号International Publication No. 2010/082294 国際公開第２０１６／０４６９１５号International Publication No. 2016/046915 国際公開第２０１９／２１６２５６号International Publication No. 2019/216256
　ファスナーテープに対する所望の取付強度を確保するという制約の下、樹脂製エレメントを細幅化することで金属製エレメントの外観により似せることができ、かつその細幅化に伴ってスライダーの摺動抵抗を低減することができる。しかしながら、金属製エレメントとの外観一致に拘ると１以上の問題が発生し得る。例えば、特許文献１の場合、樹脂製エレメントを細幅化すると、これに伴ってその先細り部分（同文献の図２の符号１３ａ，１３ｂ参照）も更に細幅になってしまう。その先細り部分の機械的強度の低下、或いは、射出成形金型の微細化及び／又は高コスト化といった１以上の問題が発生するおそれがある。また、特許文献３の方法では、ファスナーエレメントを細幅に見せることはできるが、ファスナーエレメント自体の細幅化を達成しておらず、この結果、スライダーの摺動抵抗を低減することができない。 Under the constraint of ensuring the desired attachment strength to the fastener tape, the resin element can be made to have a similar appearance to the metal element by narrowing the width, and the sliding resistance of the slider can be reduced by the narrowing. However, insisting on matching the appearance with the metal element can cause one or more problems. For example, in the case of Patent Document 1, narrowing the resin element also makes the tapered portion (see references 13a and 13b in Figure 2 of the same document) even narrower. This may cause one or more problems, such as a decrease in the mechanical strength of the tapered portion, or the need to make the injection molding die finer and/or more expensive. In addition, the method of Patent Document 3 can make the fastener element look narrow, but does not achieve narrowing of the fastener element itself, and as a result, it is not possible to reduce the sliding resistance of the slider.
　本願発明者は、上述の非限定の例示の検討を踏まえ、ファスナーエレメントの細幅化を更に促進してスライダーの摺動抵抗を更に低減させるという新たな課題を見出した。 　Based on the consideration of the above non-limiting examples, the inventors of the present application have discovered a new problem: how to further reduce the sliding resistance of the slider by further reducing the width of the fastener element.
　本開示の一態様に係るスライドファスナーは、左右一対のファスナーストリンガーにして、各ファスナーストリンガーは、ファスナーテープと、ファスナーテープの側縁部に所定ピッチで取り付けられた複数のファスナーエレメントを含み、各ファスナーエレメントは、ファスナーテープが存在する平面に関して下方及び上方に各々が設けられたエレメント下部及びエレメント上部を含み、エレメント下部が、少なくとも一つの係合部及び少なくとも一つの被係合部を有する、左右一対のファスナーストリンガーと、左右一対のファスナーストリンガーの一方に含まれる個々のファスナーエレメントと左右一対のファスナーストリンガーの他方に含まれる個々のファスナーエレメントを互い違いに係合させるべくスライドファスナーの中心線上を前進し、かつそれらの係合解除のためにスライドファスナーの中心線上を後進するスライダーを含む。各ファスナーエレメントのエレメント上部は、スライドファスナーの中心線に直交するスライドファスナーの幅方向に沿って延びる上面と、スライドファスナーの幅方向に沿って延びる前側面と、スライドファスナーの幅方向に沿って延びる後側面を含む単一の細長形状の部分を含む。左右一対のファスナーストリンガーの一方に含まれる個々のファスナーエレメントと左右一対のファスナーストリンガーの他方に含まれる個々のファスナーエレメントが係合したスライドファスナーの閉状態で、各ファスナーエレメントのエレメント上部は、スライドファスナーの中心線を跨がないように形状付けられる。 A slide fastener according to one embodiment of the present disclosure includes a pair of left and right fastener stringers, each of which includes a fastener tape and a plurality of fastener elements attached to the side edge of the fastener tape at a predetermined pitch, each of which includes a lower element portion and an upper element portion provided below and above the plane on which the fastener tape exists, and the lower element portion includes at least one engaging portion and at least one engaged portion, and a slider that advances along the center line of the slide fastener to alternately engage the individual fastener elements included in one of the pair of left and right fastener stringers with the individual fastener elements included in the other of the pair of left and right fastener stringers, and that moves backward along the center line of the slide fastener to disengage them. The upper element portion of each fastener element includes a single elongated portion including an upper surface extending along the width direction of the slide fastener perpendicular to the center line of the slide fastener, a front side surface extending along the width direction of the slide fastener, and a rear side surface extending along the width direction of the slide fastener. In the closed state of the slide fastener, in which an individual fastener element included in one of a pair of left and right fastener stringers is engaged with an individual fastener element included in the other of the pair of left and right fastener stringers, the upper part of each fastener element is shaped so as not to straddle the center line of the slide fastener.
　本開示の別態様に係るスライドファスナーは、左右一対のファスナーストリンガーにして、各ファスナーストリンガーは、ファスナーテープと、ファスナーテープの側縁部に所定ピッチで取り付けられた複数のファスナーエレメントを含み、各ファスナーエレメントは、ファスナーテープが存在する平面に関して下方及び上方に各々が設けられたエレメント下部及びエレメント上部を含み、エレメント下部が、少なくとも一つの係合部及び少なくとも一つの被係合部を有する、左右一対のファスナーストリンガーと、左右一対のファスナーストリンガーの一方に含まれる個々のファスナーエレメントと左右一対のファスナーストリンガーの他方に含まれる個々のファスナーエレメントを互い違いに係合させるべくスライドファスナーの中心線上を前進し、かつそれらの係合解除のためにスライドファスナーの中心線上を後進するスライダーを含む。各ファスナーエレメントのエレメント上部は、スライドファスナーの中心線に直交するスライドファスナーの幅方向に沿って延びる上面と、スライドファスナーの幅方向に沿って延びる前側面と、スライドファスナーの幅方向に沿って延びる後側面と、上面と前側面の間でスライドファスナーの幅方向に沿って延びる第１中間面と、上面と後側面の間でスライドファスナーの幅方向に沿って延びる第２中間面を含み、上面と第１中間面の間に第１境界線が画定され、上面と第２中間面の間に第２境界線が画定される。スライドファスナーの閉状態で、各ファスナーエレメントのエレメント上部の上面、前側面、及び後側面は、スライドファスナーの中心線を跨がないように形状付けられる。スライドファスナーの閉状態で、左右一対のファスナーストリンガーの異なるファスナーストリンガーに設けられ、かつスライドファスナーの中心線上で隣接して係合する前側及び後側のファスナーエレメントそれぞれにおいて、少なくともファスナーテープの側縁部に設けられた芯紐上で第１境界線に接すると共にスライドファスナーの幅方向に平行に延びる第１仮想線と、少なくともファスナーテープの側縁部に設けられた芯紐上で第２境界線に接すると共にスライドファスナーの幅方向に平行に延びる第２仮想線を設定する時、後側のファスナーエレメントの第１仮想線と前側のファスナーエレメントの第２仮想線が両者の間に隙間を空けて交差することなく延びるようにファスナーエレメントのエレメント上部が形状付けられる。 A slide fastener according to another aspect of the present disclosure comprises a pair of left and right fastener stringers, each of which includes a fastener tape and a plurality of fastener elements attached to the side edge of the fastener tape at a predetermined pitch, each of which includes a lower element portion and an upper element portion respectively provided below and above the plane in which the fastener tape exists, the lower element portion having at least one engaging portion and at least one engaged portion, and a slider which moves forward on the center line of the slide fastener to alternately engage the individual fastener elements included in one of the pair of left and right fastener stringers with the individual fastener elements included in the other of the pair of left and right fastener stringers, and which moves backward on the center line of the slide fastener to disengage them. The element upper part of each fastener element includes an upper surface extending along the width direction of the slide fastener perpendicular to the center line of the slide fastener, a front side surface extending along the width direction of the slide fastener, a rear side surface extending along the width direction of the slide fastener, a first intermediate surface extending along the width direction of the slide fastener between the upper surface and the front side surface, and a second intermediate surface extending along the width direction of the slide fastener between the upper surface and the rear side surface, and a first boundary line is defined between the upper surface and the first intermediate surface, and a second boundary line is defined between the upper surface and the second intermediate surface. When the slide fastener is in a closed state, the upper surface, the front side surface, and the rear side surface of the element upper part of each fastener element are shaped so as not to straddle the center line of the slide fastener. In the closed state of the slide fastener, in each of the front and rear fastener elements provided on different fastener stringers of a pair of left and right fastener stringers and adjacently engaged on the center line of the slide fastener, when a first virtual line is set that is tangent to a first boundary line at least on the core string provided on the side edge of the fastener tape and extends parallel to the width direction of the slide fastener, and a second virtual line is set that is tangent to a second boundary line at least on the core string provided on the side edge of the fastener tape and extends parallel to the width direction of the slide fastener, the upper part of the fastener element is shaped so that the first virtual line of the rear fastener element and the second virtual line of the front fastener element extend with a gap between them without crossing.
　本開示の更なる別態様に係るスライドファスナーは、左右一対のファスナーストリンガーにして、各ファスナーストリンガーは、ファスナーテープと、ファスナーテープの側縁部に所定ピッチで取り付けられた複数のファスナーエレメントを含み、各ファスナーエレメントは、ファスナーテープが存在する平面に関して下方及び上方に各々が設けられたエレメント下部及びエレメント上部を含み、エレメント下部が、少なくとも一つの係合部及び少なくとも一つの被係合部を有する、左右一対のファスナーストリンガーと、左右一対のファスナーストリンガーの一方に含まれる個々のファスナーエレメントと左右一対のファスナーストリンガーの他方に含まれる個々のファスナーエレメントを互い違いに係合させるべくスライドファスナーの中心線上を前進し、かつそれらの係合解除のためにスライドファスナーの中心線上を後進するスライダーを含む。各ファスナーエレメントのエレメント上部は、スライドファスナーの中心線に直交するスライドファスナーの幅方向に沿って延びる上面と、スライドファスナーの幅方向に沿って延びる前側面と、スライドファスナーの幅方向に沿って延びる後側面と、上面と前側面の間でスライドファスナーの幅方向に沿って延びる第１中間面と、上面と後側面の間でスライドファスナーの幅方向に沿って延びる第２中間面を含み、上面と第１中間面の間に第１境界線が画定され、上面と第２中間面の間に第２境界線が画定される。ファスナーエレメントのエレメント上部は、ファスナーテープのテープ面上に位置する上部基端面と、ファスナーテープのテープ面外に位置する上部先端面を有する。スライドファスナーの閉状態で、左右一対のファスナーストリンガーの一方に含まれる個々のファスナーエレメントの上部先端面と左右一対のファスナーストリンガーの他方に含まれる個々のファスナーエレメントの上部先端面が、スライドファスナーの中心線の両側に交互に配置される。スライドファスナーの閉状態で、左右一対のファスナーストリンガーの異なるファスナーストリンガーに設けられ、かつスライドファスナーの中心線上で隣接して係合する前側及び後側のファスナーエレメントそれぞれにおいて、少なくともファスナーテープの側縁部に設けられた芯紐上で第１境界線に接すると共にスライドファスナーの幅方向に平行に延びる第１仮想線と、少なくともファスナーテープの側縁部に設けられた芯紐上で第２境界線に接すると共にスライドファスナーの幅方向に平行に延びる第２仮想線を設定する時、後側のファスナーエレメントの第１仮想線と前側のファスナーエレメントの第２仮想線が両者の間に隙間を空けて交差することなく延びるようにファスナーエレメントのエレメント上部が形状付けられる。 A slide fastener according to a further aspect of the present disclosure comprises a pair of left and right fastener stringers, each of which includes a fastener tape and a plurality of fastener elements attached to a side edge of the fastener tape at a predetermined pitch, each of which includes a lower element portion and an upper element portion respectively provided below and above the plane in which the fastener tape exists, the lower element portion having at least one engaging portion and at least one engaged portion, and a slider which moves forward on the center line of the slide fastener to alternately engage the individual fastener elements included in one of the pair of left and right fastener stringers with the individual fastener elements included in the other of the pair of left and right fastener stringers, and which moves backward on the center line of the slide fastener to disengage them. The element upper part of each fastener element includes an upper surface extending along the width direction of the slide fastener perpendicular to the center line of the slide fastener, a front side surface extending along the width direction of the slide fastener, a rear side surface extending along the width direction of the slide fastener, a first intermediate surface extending along the width direction of the slide fastener between the upper surface and the front side surface, and a second intermediate surface extending along the width direction of the slide fastener between the upper surface and the rear side surface, and a first boundary line is defined between the upper surface and the first intermediate surface, and a second boundary line is defined between the upper surface and the second intermediate surface. The element upper part of the fastener element has an upper base end surface located on the tape surface of the fastener tape, and an upper tip surface located outside the tape surface of the fastener tape. In the closed state of the slide fastener, the upper tip surface of each fastener element included in one of the pair of left and right fastener stringers and the upper tip surface of each fastener element included in the other of the pair of left and right fastener stringers are alternately arranged on both sides of the center line of the slide fastener. In the closed state of the slide fastener, in each of the front and rear fastener elements provided on different fastener stringers of a pair of left and right fastener stringers and adjacently engaged on the center line of the slide fastener, when a first virtual line is set that is tangent to a first boundary line at least on the core string provided on the side edge of the fastener tape and extends parallel to the width direction of the slide fastener, and a second virtual line is set that is tangent to a second boundary line at least on the core string provided on the side edge of the fastener tape and extends parallel to the width direction of the slide fastener, the upper part of the fastener element is shaped so that the first virtual line of the rear fastener element and the second virtual line of the front fastener element extend with a gap between them without crossing.
　上述のいずれかの形態は、以下の１以上の特徴又はこれらの任意の組み合わせを更に含むことができる。言うまでも無く、上述のいずれかの形態の一部の特徴を以下のいずれかの特徴で置換して新たに別形態を把握することも可能である。
［１］スライドファスナーの閉状態で、前側のファスナーエレメントの第２仮想線は、後側のファスナーエレメントの前側面と第１中間面の間の第３境界線に一致又は近接して延びる。
［２］前側及び後側のファスナーエレメントそれぞれにおいて、第１仮想線と第２仮想線の間で定まるファスナーエレメントのエレメント上部の上面の幅は、ファスナーテープに接し、かつスライドファスナーの幅方向に沿って延びる前側面の下辺と、ファスナーテープに接し、かつスライドファスナーの幅方向に沿って延びる後側面の下辺から定まるエレメント上部の幅の１／２値に０．８を乗算した下限値と１／２値に１．２を乗算した上限値から定まる範囲内に属する。
［３］前側面と第１中間面の間の第３境界線が画定され、後側面と第２中間面の間の第４境界線が画定され、第１乃至第４境界線が、少なくともファスナーテープの側縁部に設けられた芯紐の全幅に亘ってお互いに略平行に配向される。
［４］隙間は、前側及び後側のファスナーエレメントの一つのファスナーエレメントにおける第１仮想線と第２仮想線の間隔の１／３以下である、及び／又は、隙間は、第１仮想線と第２仮想線の間隔の１／５以上である。
［５］各ファスナーエレメントのエレメント上部は、上面と前側面の間でスライドファスナーの幅方向に沿って延びる第１中間面と、上面と後側面の間でスライドファスナーの幅方向に沿って延びる第２中間面を更に含み、第１中間面は、上面と第１中間面の間の第１境界線から第１中間面と前側面の間の第３境界線まで湾曲しながら下方に延びる湾曲面であり、第２中間面は、上面と第２中間面の間の第２境界線から第２中間面と後側面の間の第４境界線まで湾曲しながら下方に延びる湾曲面である。
［６］各ファスナーエレメントのエレメント上部は、前側面及び後側面の傾斜によって上面から離れるに応じて幅広になる。例えば、この結果、テーパー形状を有し得る。
［７］前側面及び後側面は、各々、ファスナーテープのテープ上面に対して７５°～８５°の範囲内の角度を成す。
［８］スライドファスナーの閉状態で、前側及び後側のファスナーエレメントの前側のファスナーエレメントの後側面と、前側及び後側のファスナーエレメントの後側のファスナーエレメントの前側面をスライドファスナーの幅方向に沿って共通の平面まで平行移動する時、前側のファスナーエレメントの後側面と後側のファスナーエレメントの前側面は、頂角が鋭角な二等辺三角形の等辺の少なくとも一部を形成する。
［９］各ファスナーエレメントのエレメント上部は、ファスナーテープのテープ面上に位置する上部基端面と、ファスナーテープのテープ面外に位置する上部先端面を有し、スライドファスナーの閉状態で、左右一対のファスナーストリンガーの一方に含まれる個々のファスナーエレメントの上部先端面と左右一対のファスナーストリンガーの他方に含まれる個々のファスナーエレメントの上部先端面が、スライドファスナーの中心線の両側に交互に配置される。
［１０］各ファスナーエレメントのエレメント上部は、ファスナーテープのテープ面上に位置する上部基端面と、ファスナーテープのテープ面外に位置する上部先端面を有し、スライドファスナーの閉状態で、前側及び後側のファスナーエレメントの前側のファスナーエレメントの上部先端面と、前側及び後側のファスナーエレメントの後側のファスナーエレメントの上部先端面をスライドファスナーの中心線に沿って共通の平面まで平行移動する時、前側のファスナーエレメントの上部先端面と後側のファスナーエレメントの上部先端面は、頂角が鋭角な二等辺三角形の等辺の少なくとも一部を形成する。
［１１］各ファスナーエレメントは、スライドファスナーの幅方向に平行なエレメント中心線を有し、各ファスナーエレメントのエレメント上部及びエレメント下部がエレメント中心線上に設けられ、かつエレメント中心線に関して対称に形状付けられる。
［１２］各ファスナーエレメントのエレメント上部の上面は、スライドファスナーの幅方向に平行なエレメント中心線に沿って細長い矩形状の輪郭を有する。
［１３］エレメント上部は、スライドファスナーの幅方向に平行なエレメント中心線に沿って上部基端面と上部先端面の間で細長く形状付けられた略直方体状部分であり、エレメント下部は、エレメント中心線に沿って下部基端面と下部先端面の間で細長く形状付けられる。
［１４］エレメント上部は、上面と前側面の間でスライドファスナーの幅方向に沿って延びる第１中間面と、上面と後側面の間でスライドファスナーの幅方向に沿って延びる第２中間面を更に含み、左右一対のファスナーストリンガーの各ファスナーストリンガーにおいて、ファスナーエレメントのエレメント上部の上部先端面が下部先端面よりもファスナーテープの側縁部寄りにオフセットして設けられ、下部先端面と上部先端面の間に中間面が形成される。
［１５］上部先端面と中間面のなす角が、９０°と１００°の間の範囲内の角度に等しい。
［１６］次の（ｉ）及び（ｉｉ）の少なくとも一つの条件を満足する：（ｉ）中間面の幅は、エレメント中心線沿いに上部先端面から離れるに応じて漸増し、続いて漸減する；及び（ｉｉ）中間面は、上部先端面により円弧が切除された正円形状の輪郭を有する。
［１７］エレメント下部は、下部基端面を有する基部、下部先端面を有する頭部、及び基部と頭部の間で最小のエレメント幅を有するように括れた形状の首部を含む。
［１８］左右一対のファスナーストリンガーの各ファスナーストリンガーにおいて、上部先端面は、エレメント中心線沿いにおいて首部における最小のエレメント幅の位置よりもファスナーテープのテープ外方に位置付けられる；及び／又は左右一対のファスナーストリンガーの各ファスナーストリンガーの各ファスナーエレメントにおいて、上部先端面は、エレメント中心線に沿う方向において下部先端面又はその最先端位置と比較して首部における最小のエレメント幅の位置寄りに位置付けられる。
［１９］各ファスナーエレメントの各エレメント上部は、ファスナーテープのテープ面上に位置する上部基端面と、上部基端面の反対側に位置する上部先端面を有し、エレメント上部の上面は、主領域と、主領域と上部基端面の上端の間において第１所定角度で緩慢に傾斜する第１傾斜領域と、主領域と上部先端面の上端の間において第２所定角度で緩慢に傾斜する第２傾斜領域の合計３つの領域から成る。 Any of the above-mentioned aspects may further include one or more of the following features or any combination thereof. Needless to say, it is also possible to grasp a new embodiment by replacing some features of any of the above-mentioned aspects with any of the following features.
[1] In the closed state of the slide fastener, the second imaginary line of the front fastener element extends coincident with or adjacent to a third boundary line between the front side surface of the rear fastener element and the first intermediate surface.
[2] In each of the front and rear fastener elements, the width of the upper surface of the element upper part of the fastener element determined between the first virtual line and the second virtual line falls within a range determined by a lower limit value obtained by multiplying 1/2 of the width of the element upper part determined from the lower edge of the front side surface that is in contact with the fastener tape and extends along the width direction of the slide fastener and the lower edge of the rear side surface that is in contact with the fastener tape and extends along the width direction of the slide fastener, by 0.8 and an upper limit value obtained by multiplying 1/2 of that value by 1.2.
[3] A third boundary line is defined between the front side surface and the first intermediate surface, and a fourth boundary line is defined between the rear side surface and the second intermediate surface, and the first to fourth boundary lines are oriented approximately parallel to each other at least across the entire width of the core cord provided at the side edge portion of the fastener tape.
[4] The gap is less than 1/3 of the distance between the first imaginary line and the second imaginary line in one of the front and rear fastener elements, and/or the gap is more than 1/5 of the distance between the first imaginary line and the second imaginary line.
[5] The upper element portion of each fastener element further includes a first intermediate surface extending along the width direction of the slide fastener between the upper surface and the front side surface, and a second intermediate surface extending along the width direction of the slide fastener between the upper surface and the rear side surface, the first intermediate surface being a curved surface extending downward while curving from a first boundary line between the upper surface and the first intermediate surface to a third boundary line between the first intermediate surface and the front side surface, and the second intermediate surface being a curved surface extending downward while curving from a second boundary line between the upper surface and the second intermediate surface to a fourth boundary line between the second intermediate surface and the rear side surface.
[6] The upper portion of each fastener element may be wider away from the top surface due to the slope of the front and rear sides, for example resulting in a tapered shape.
[7] The front and rear sides each form an angle within the range of 75° to 85° with respect to the upper tape surface of the fastener tape.
[8] When the slide fastener is in a closed state, when the rear side surface of the front fastener element of the front and rear fastener elements and the front side surface of the rear fastener element of the front and rear fastener elements are moved parallel to a common plane along the width direction of the slide fastener, the rear side surface of the front fastener element and the front side surface of the rear fastener element form at least a part of the equal sides of an isosceles triangle with an acute apex angle.
[9] The upper element surface of each fastener element has an upper base end surface located on the tape surface of the fastener tape and an upper tip surface located outside the tape surface of the fastener tape, and when the slide fastener is in a closed state, the upper tip surfaces of each fastener element included in one of the pair of left and right fastener stringers and the upper tip surfaces of each fastener element included in the other of the pair of left and right fastener stringers are alternately arranged on both sides of the center line of the slide fastener.
[10] The element upper part of each fastener element has an upper base end surface located on the tape surface of the fastener tape and an upper tip surface located outside the tape surface of the fastener tape, and when the upper tip surface of the front fastener element of the front and rear fastener elements and the upper tip surface of the rear fastener element of the front and rear fastener elements are moved parallel to a common plane along the center line of the slide fastener in a closed state, the upper tip surface of the front fastener element and the upper tip surface of the rear fastener element form at least a part of the equal sides of an isosceles triangle with an acute apex angle.
[11] Each fastener element has an element center line parallel to the width direction of the slide fastener, and the element upper and element lower portions of each fastener element are provided on the element center line and are shaped symmetrically with respect to the element center line.
[12] The upper surface of the upper portion of each fastener element has an elongated rectangular contour along an element center line parallel to the width direction of the slide fastener.
[13] The upper part of the element is a generally rectangular parallelepiped portion that is elongated between the upper base end face and the upper tip face along the element center line that is parallel to the width direction of the slide fastener, and the lower part of the element is elongated between the lower base end face and the lower tip face along the element center line.
[14] The upper part of the element further includes a first intermediate surface extending along the width direction of the slide fastener between the upper surface and the front side surface, and a second intermediate surface extending along the width direction of the slide fastener between the upper surface and the rear side surface, and in each fastener stringer of the pair of left and right fastener stringers, the upper tip surface of the upper part of the fastener element is offset closer to the side edge of the fastener tape than the lower tip surface, and an intermediate surface is formed between the lower tip surface and the upper tip surface.
[15] The angle between the upper tip surface and the intermediate surface is equal to an angle in the range between 90° and 100°.
[16] At least one of the following conditions (i) and (ii) is satisfied: (i) the width of the intermediate surface gradually increases and then gradually decreases with distance from the upper tip surface along the element centerline; and (ii) the intermediate surface has a contour that is a perfect circle with an arc cut off by the upper tip surface.
[17] The lower element portion includes a base portion having a lower proximal surface, a head portion having a lower distal surface, and a neck portion narrowed to provide a minimum element width between the base portion and the head portion.
[18] In each fastener stringer of a pair of left and right fastener stringers, the upper tip surface is positioned outward of the fastener tape along the element center line from the position of the minimum element width at the neck portion; and/or in each fastener element of each fastener stringer of a pair of left and right fastener stringers, the upper tip surface is positioned closer to the position of the minimum element width at the neck portion than the lower tip surface or its most distal end position in the direction along the element center line.
[19] An upper portion of each fastener element has an upper base end surface located on the tape surface of the fastener tape and an upper tip surface located opposite the upper base end surface, and the upper surface of the upper portion of the element is composed of a total of three regions: a main region, a first inclined region that gradually inclines at a first predetermined angle between the main region and the upper end of the upper base end surface, and a second inclined region that gradually inclines at a second predetermined angle between the main region and the upper end of the upper tip surface.
　本開示の一態様によれば、ファスナーエレメントの細幅化を更に促進してスライダーの摺動抵抗を更に低下させることを促進可能である。 According to one aspect of the present disclosure, it is possible to further promote narrowing of the fastener element and further reduce the sliding resistance of the slider.
本開示の一態様に係るスライドファスナーの概略的な上面図である。1 is a schematic top view of a slide fastener according to one embodiment of the present disclosure. スライドファスナーの概略的な部分斜視図であり、スライダーの図示は省略している。FIG. 2 is a schematic partial perspective view of a slide fastener, with the slider not shown. スライドファスナーの概略的な上面模式図であり、左右のファスナーエレメント同士の係合状態を模式的に示す。FIG. 2 is a schematic top view of a slide fastener, showing a schematic state in which left and right fastener elements are engaged with each other. スライドファスナーが閉状態の時のスライドファスナーの左側面図であり、第１仮想線ＤＬ１と第２仮想線ＤＬ２の位置を矢印にて指し示す。FIG. 2 is a left side view of the slide fastener when the slide fastener is in a closed state, with the positions of a first imaginary line DL1 and a second imaginary line DL2 indicated by arrows. 図３の一点鎖線ＩＶ－ＩＶに沿うスライドファスナーの概略的な部分断面模式図である。4 is a schematic partial cross-sectional view of the slide fastener taken along the dashed line IV-IV in FIG. 3. ファスナーテープの側縁部に取り付けられたファスナーエレメントの概略的な斜視図である。FIG. 2 is a schematic perspective view of a fastener element attached to a side edge of a fastener tape. ファスナーテープの側縁部に取り付けられた隣接する二つのファスナーエレメントの概略的な上面図である。1 is a schematic top view of two adjacent fastener elements attached to a side edge of a fastener tape. FIG. ファスナーテープの側縁部に取り付けられた隣接する二つのファスナーエレメントの概略的な下面図である。2 is a schematic bottom view of two adjacent fastener elements attached to a side edge of a fastener tape. FIG. ファスナーテープの側縁部に取り付けられた隣接する二つのファスナーエレメントの概略的な側面図であり、中間面の上下にエレメント上部の上部先端面及びエレメント下部の下部先端面を示す。1 is a schematic side view of two adjacent fastener elements attached to the side edges of a fastener tape, showing the upper tip surface of the upper element and the lower tip surface of the lower element above and below the mid-plane. ファスナーテープの側縁部に取り付けられた隣接する二つのファスナーエレメントの概略的な側面図であり（但し、右側エレメントは断面図）、ファスナーテープの上下にエレメント上部の上部基端面及びエレメント下部の下部基端面を示す。This is a schematic side view of two adjacent fastener elements attached to the side edge portions of a fastener tape (however, the right-hand element is a cross-sectional view), showing the upper base end surface of the upper element and the lower base end surface of the lower element above and below the fastener tape.
　以下、図面を参照しつつ、様々な実施形態及び特徴について説明する。当業者は、過剰説明を要せず、各実施形態及び／又は各特徴を組み合わせることができ、この組み合わせによる相乗効果も理解可能である。実施形態間の重複説明は、原則的に省略する。参照図面は、発明の記述を主たる目的とするものであり、作図の便宜のために簡略化されている。各特徴は、本願に図示されたスライドファスナーにのみ有効であるものではなく、本明細書に図示されていない他の様々なスライドファスナーにも通用する普遍的な特徴として理解される。 Various embodiments and features will be described below with reference to the drawings. Those skilled in the art will be able to combine the various embodiments and/or features without the need for excessive explanation, and will also be able to understand the synergistic effects of such combinations. In principle, overlapping explanations between embodiments will be omitted. The reference drawings are primarily intended to describe the invention, and have been simplified for the convenience of drawing. Each feature is not only effective for the slide fastener illustrated in this application, but is understood to be a universal feature that is also applicable to various other slide fasteners not illustrated in this specification.
　本願明細書では、スライドファスナー基準の方向を示す用語として、お互いに直交関係にある前後方向、左右方向、及び上下方向が参照される。ファスナーテープ基準の方向を示す用語として、お互いに直交関係にあるテープ幅方向、テープ長さ方向、及びテープ厚み方向が参照される。ファスナーエレメント基準の方向を示す用語として、お互いに直交関係にあるエレメント中心線、エレメント幅方向、及びエレメント厚み方向が参照される。必ずしもこの限りではないが、前後方向、テープ長さ方向、及びエレメント幅方向が同一の方向を意味し、又はお互いに平行である。同様、左右方向、テープ幅方向、及びエレメント中心線が同一の方向を意味し、又はお互いに平行である。同様、上下方向、テープ厚み方向、及びエレメント厚み方向が同一の方向を意味し、又はお互いに平行である。 In this specification, the terms used to indicate the slide fastener reference directions are the front-rear direction, the left-right direction, and the up-down direction, which are mutually orthogonal. The terms used to indicate the fastener tape reference directions are the tape width direction, the tape length direction, and the tape thickness direction, which are mutually orthogonal. The terms used to indicate the fastener element reference directions are the element centerline, the element width direction, and the element thickness direction, which are mutually orthogonal. Although not necessarily so, the front-rear direction, the tape length direction, and the element width direction mean the same direction or are parallel to each other. Similarly, the left-right direction, the tape width direction, and the element centerline mean the same direction or are parallel to each other. Similarly, the up-down direction, the tape thickness direction, and the element thickness direction mean the same direction or are parallel to each other.
　前後方向は、スライドファスナー１の開閉のためのスライダー９の移動方向に合致し、スライドファスナー１の長手方向に一致する。左右方向は、前後方向に直交する方向であって、スライドファスナー１の幅方向に一致する。上下方向は、前後及び左右方向に直交する方向である。勿論、上下方向が鉛直方向（重力方向）に一致する必要はない。即ち、本願明細書で参照される方向を示す用語は、鉛直方向（重力方向）とは無関係である。 The front-to-rear direction corresponds to the direction of movement of the slider 9 for opening and closing the slide fastener 1, and coincides with the longitudinal direction of the slide fastener 1. The left-to-right direction is a direction perpendicular to the front-to-rear direction, and corresponds to the width direction of the slide fastener 1. The up-to-down direction is a direction perpendicular to the front-to-rear and left-to-right directions. Of course, the up-to-down direction does not have to correspond to the vertical direction (direction of gravity). In other words, the terms indicating directions referred to in this specification are unrelated to the vertical direction (direction of gravity).
　図１乃至図１０を参照してスライドファスナー１について説明する。図１は、スライドファスナー１の概略的な上面図である。図２は、スライドファスナー１の概略的な部分斜視図であり、スライダー９の図示は省略している。図３は、スライドファスナー１の概略的な上面模式図であり、左右のファスナーエレメント４，４’同士の係合状態を模式的に示す。図４は、スライドファスナー１が閉状態の時のスライドファスナー１の左側面図である。この時、左右一対のファスナーストリンガー２，２’の一方に含まれる個々のファスナーエレメント４の上部先端面６５と左右一対のファスナーストリンガー２，２’の他方に含まれる個々のファスナーエレメント４’の上部先端面６５’が、スライドファスナー１の中心線ＣＬの両側に交互に配置される。図５は、図３の一点鎖線ＩＶ－ＩＶに沿うスライドファスナー１の概略的な部分断面模式図である。図６は、ファスナーテープ３，３’の側縁部３１に取り付けられたファスナーエレメント４の概略的な斜視図である。図７は、ファスナーテープ３，３’の側縁部３１に取り付けられた隣接する二つのファスナーエレメントの概略的な上面図である。図８は、ファスナーテープ３，３’の側縁部３１に取り付けられた隣接する二つのファスナーエレメント４の概略的な下面図である。図９は、ファスナーテープ３，３’の側縁部３１に取り付けられた隣接する二つのファスナーエレメント４の概略的な側面図であり、後述の中間面７，７’の上下にエレメント上部６の上部先端面６５及びエレメント下部５の下部先端面５５を示す。図１０は、ファスナーテープ３，３’の側縁部３１に取り付けられた隣接する二つのファスナーエレメント４の概略的な側面図（但し、右側エレメントは断面図）であり、ファスナーテープ３，３’の上下にエレメント上部６の上部基端面６４及びエレメント下部５の下部基端面５４，５４’を示す。 The slide fastener 1 will be described with reference to Figures 1 to 10. Figure 1 is a schematic top view of the slide fastener 1. Figure 2 is a schematic partial perspective view of the slide fastener 1, with the slider 9 omitted. Figure 3 is a schematic top view of the slide fastener 1, and shows the engagement state of the left and right fastener elements 4, 4'. Figure 4 is a left side view of the slide fastener 1 when the slide fastener 1 is in a closed state. At this time, the upper end surface 65 of each fastener element 4 included in one of the pair of left and right fastener stringers 2, 2' and the upper end surface 65' of each fastener element 4' included in the other of the pair of left and right fastener stringers 2, 2' are alternately arranged on both sides of the center line CL of the slide fastener 1. Figure 5 is a schematic partial cross-sectional view of the slide fastener 1 along the dashed line IV-IV in Figure 3. Figure 6 is a schematic perspective view of the fastener element 4 attached to the side edge portion 31 of the fastener tape 3, 3'. FIG. 7 is a schematic top view of two adjacent fastener elements attached to the side edge 31 of the fastener tape 3, 3'. FIG. 8 is a schematic bottom view of two adjacent fastener elements 4 attached to the side edge 31 of the fastener tape 3, 3'. FIG. 9 is a schematic side view of two adjacent fastener elements 4 attached to the side edge 31 of the fastener tape 3, 3', showing the upper tip surface 65 of the element upper part 6 and the lower tip surface 55 of the element lower part 5 above and below the intermediate surface 7, 7' described below. FIG. 10 is a schematic side view of two adjacent fastener elements 4 attached to the side edge 31 of the fastener tape 3, 3' (however, the right element is a cross-sectional view), showing the upper base end surface 64 of the element upper part 6 and the lower base end surfaces 54, 54' of the element lower part 5 above and below the fastener tape 3, 3'.
　スライドファスナー１は、典型的には、略一定の左右幅で前後方向に長尺に延びる可撓性の長尺部材である。スライドファスナー１は、左右一対のファスナーストリンガー２，２’と、スライダー９を有する。スライダー９は、左右一対のファスナーストリンガー２，２’の一方に含まれる個々のファスナーエレメント４と左右一対のファスナーストリンガー２，２’の他方に含まれる個々のファスナーエレメント４’を互い違いに係合させるべくスライドファスナー１の中心線ＣＬ上を前進し、かつそれらの係合解除のためにスライドファスナー１の中心線ＣＬ上を後進する。スライダー９としては一般的な構造のスライダーを採用することができる。スライダー９は、後述のファスナーエレメント４，４’のエレメント上部６，６’側の上翼板、エレメント下部５，５’側の下翼板、上翼板と下翼板を連結する連結柱を有する。連結柱により係合状態の左右のファスナーエレメント４，４’の係合が解除される。スライダー９の連結柱は、ファスナーエレメント４，４’の係合及び係合解除の両過程においてエレメント下部５，５’の移動を案内するように設けられる。ファスナーエレメント４，４’の係合及び係合解除の両過程において、エレメント上部６，６’がスライダー９の連結柱に接触するか否かは任意であり、両者の間に隙間があっても構わない。 The slide fastener 1 is typically a flexible, elongated member that extends in the front-rear direction with a substantially constant left-right width. The slide fastener 1 has a pair of left and right fastener stringers 2, 2' and a slider 9. The slider 9 advances on the center line CL of the slide fastener 1 to alternately engage the individual fastener elements 4 included in one of the pair of left and right fastener stringers 2, 2' with the individual fastener elements 4' included in the other of the pair of left and right fastener stringers 2, 2', and moves backward on the center line CL of the slide fastener 1 to disengage them. A slider of a general structure can be used as the slider 9. The slider 9 has upper wing plates on the element upper part 6, 6' side of the fastener elements 4, 4' described below, lower wing plates on the element lower part 5, 5' side, and connecting columns that connect the upper wing plates and the lower wing plates. The connecting columns disengage the engaged left and right fastener elements 4, 4'. The connecting posts of the slider 9 are provided to guide the movement of the lower element parts 5, 5' during both the engagement and disengagement processes of the fastener elements 4, 4'. During both the engagement and disengagement processes of the fastener elements 4, 4', it is optional whether the upper element parts 6, 6' contact the connecting posts of the slider 9 or not, and there may be a gap between them.
　左右のファスナーストリンガー２，２’は、ファスナーエレメント４，４’同士の係合のためにファスナーエレメントの配列が前後方向に半ピッチ（Ｐｉ／２）だけオフセットして設けられる点を除いて構成が同一である（或いはその点を除いて鏡像対称の関係にある）。従って、左側のファスナーストリンガー２についてした説明は、右側のファスナーストリンガー２’にも同様に当てはまる。左側のファスナーストリンガー２の要素に対応する右側のファスナーストリンガー２’の要素には、左側のファスナーストリンガー２の要素に割り当てた算用数字と同一の算用数字にコロンを付して示して参照する。 The left and right fastener stringers 2, 2' are identical in configuration (or are mirror images except for the fact that the arrangement of the fastener elements 4, 4' is offset in the front-to-rear direction by half a pitch (Pi/2) for the engagement between the fastener elements 4, 4'). Therefore, the explanation given for the left fastener stringer 2 also applies to the right fastener stringer 2'. Elements of the right fastener stringer 2' that correspond to elements of the left fastener stringer 2 are referred to by the same Arabic numerals as those assigned to the elements of the left fastener stringer 2, followed by a colon.
　ファスナーストリンガー２，２’は、ファスナーテープ３，３’と、ファスナーテープ３，３’の側縁部３１，３１’（典型的には、そこに設けられた芯紐３３，３３’）に所定ピッチＰｉで取り付けられた複数のファスナーエレメント４，４’を含む。ファスナーテープ３，３’は、テープ幅Ｗ３に比べてテープ長ＬＮ３が大きい。ファスナーエレメント４，４’は、ファスナーテープ３，３’のテープ長さ方向に沿ってファスナーテープ３，３’の側縁部３１，３１’に対して所定のピッチＰｉで個別に取り付けられる。ファスナーテープ３，３’は、織物又は編物又はこれらの混在物であり、高い可撓性を有する。ファスナーエレメント４，４’は、射出成形によってファスナーテープ３，３’の側縁部３１，３１’に取り付けられた樹脂製エレメントである。ファスナーエレメント４，４’の材料として、ナイロン、ポリアセタール、ポリアミド、ポリプロピレン、ポリブチレンテレフタレート、ポリカーボネート等が例示できるが、他の材料も使用可能である。 The fastener stringer 2, 2' includes a fastener tape 3, 3' and a plurality of fastener elements 4, 4' attached to the side edge portion 31, 31' of the fastener tape 3, 3' (typically, a core string 33, 33' provided thereon) at a predetermined pitch Pi. The fastener tape 3, 3' has a tape length LN3 larger than the tape width W3. The fastener elements 4, 4' are individually attached to the side edge portion 31, 31' of the fastener tape 3, 3' at a predetermined pitch Pi along the tape length direction of the fastener tape 3, 3'. The fastener tape 3, 3' is a woven fabric, a knitted fabric, or a mixture of these, and has high flexibility. The fastener elements 4, 4' are resin elements attached to the side edge portion 31, 31' of the fastener tape 3, 3' by injection molding. Examples of materials for the fastener elements 4, 4' include nylon, polyacetal, polyamide, polypropylene, polybutylene terephthalate, polycarbonate, etc., but other materials can also be used.
　ファスナーテープ３，３’は、テープ面としてテープ上面３６，３６’とテープ下面３７，３７’を有し、これらにより画定される略一定のテープ厚を有する。ファスナーテープ３，３’のテープ上面３６，３６’及びテープ下面３７，３７’は、テープ織又は編組織に応じた凹凸を有する非平坦面であるが、２次元的な平面と見なすことができる。更に、ファスナーテープ３，３’は、ファスナーエレメント４，４’が取り付けられる側縁部３１，３１’と、これ以外の残部のテープ主体部３２，３２’に区分可能である。側縁部３１，３１’に芯紐３３，３３’を設けることができる。芯紐３３，３３’は、側縁部３１，３１’に沿って長尺に延びる。芯紐３３，３３’は、ファスナーテープ３，３’のテープ上面３６，３６’から上方に突出する芯紐上部と、ファスナーテープ３，３’のテープ下面３７，３７’から下方に突出する芯紐下部を含む。芯紐上部と芯紐下部の一方を省略することも可能である。 The fastener tape 3, 3' has an upper tape surface 36, 36' and a lower tape surface 37, 37' as tape surfaces, and has a substantially constant tape thickness defined by these. The upper tape surface 36, 36' and the lower tape surface 37, 37' of the fastener tape 3, 3' are non-flat surfaces having irregularities according to the tape weaving or knitting structure, but can be considered as two-dimensional planes. Furthermore, the fastener tape 3, 3' can be divided into side edge portions 31, 31' to which the fastener elements 4, 4' are attached, and the remaining tape main body portion 32, 32'. A core string 33, 33' can be provided on the side edge portions 31, 31'. The core string 33, 33' extends in a long length along the side edge portions 31, 31'. The core cord 33, 33' includes an upper core cord portion that protrudes upward from the upper tape surface 36, 36' of the fastener tape 3, 3', and a lower core cord portion that protrudes downward from the lower tape surface 37, 37' of the fastener tape 3, 3'. It is also possible to omit one of the upper core cord portion and the lower core cord portion.
　ファスナーエレメント４，４’は、エレメント下部５，５’とエレメント上部６，６’を含む。エレメント下部５，５’及びエレメント上部６，６’は、各々、ファスナーテープ３，３’が存在する平面に関して下方及び上方に設けられる。エレメント上部６，６’が略直方体状部分であり得る。エレメント下部５，５’は、少なくとも一つの係合部５８及び少なくとも一つの被係合部５９を有し得る。エレメント厚み方向においてエレメント下部５，５’とエレメント上部６，６’の間でファスナーテープ３，３’の側縁部３１，３１’及び／又は芯紐３３，３３’が挟まれる。エレメント下部５，５’は、ファスナーテープ３，３’のテープ下面３７，３７’に接触及び固着する部分を含む。エレメント上部６，６’は、ファスナーテープ３，３’のテープ上面３６，３６’に接触及び固着する部分を含む。ファスナーテープ３，３’のテープ面外ではエレメント下部５，５’とエレメント上部６，６’が直に結合して積層される。 The fastener element 4, 4' includes a lower element portion 5, 5' and an upper element portion 6, 6'. The lower element portion 5, 5' and the upper element portion 6, 6' are respectively provided below and above the plane on which the fastener tape 3, 3' exists. The upper element portion 6, 6' may be a substantially rectangular parallelepiped portion. The lower element portion 5, 5' may have at least one engaging portion 58 and at least one engaged portion 59. The side edge portion 31, 31' and/or the core string 33, 33' of the fastener tape 3, 3' are sandwiched between the lower element portion 5, 5' and the upper element portion 6, 6' in the element thickness direction. The lower element portion 5, 5' includes a portion that contacts and adheres to the tape lower surface 37, 37' of the fastener tape 3, 3'. The upper element portion 6, 6' includes a portion that contacts and adheres to the tape upper surface 36, 36' of the fastener tape 3, 3'. Outside the tape surface of the fastener tapes 3, 3', the lower element parts 5, 5' and the upper element parts 6, 6' are directly bonded and laminated.
　ファスナーエレメント４，４’は、ファスナーテープ３，３’のテープ幅に平行なエレメント中心線ＣＸを有する。エレメント中心線ＣＸは、スライドファスナー１の幅方向に平行で、かつファスナーエレメント４，４’の幅方向中心に位置付けられる。エレメント中心線ＣＸ上において、エレメント上部６，６’がエレメント下部５，５’よりも短い。例えば、エレメント上部６，６’の長さＬ６は、エレメント下部５，５’の長さＬ５の２／３よりも大きく、エレメント下部５，５’の長さＬ５の４／５よりも小さい。 The fastener elements 4, 4' have an element center line CX that is parallel to the tape width of the fastener tapes 3, 3'. The element center line CX is parallel to the width direction of the slide fastener 1 and is positioned at the center of the fastener elements 4, 4' in the width direction. On the element center line CX, the element upper parts 6, 6' are shorter than the element lower parts 5, 5'. For example, the length L6 of the element upper parts 6, 6' is greater than 2/3 of the length L5 of the element lower parts 5, 5' and less than 4/5 of the length L5 of the element lower parts 5, 5'.
　エレメント上部６，６’は、エレメント中心線ＣＸ上においてそれに沿って上部基端面６４，６４’と上部先端面６５，６５’の間で細長く形状付けられた（エレメント幅がエレメント長さよりも小さい）略直方体状部分であり得る。また、エレメント下部５，５’は、エレメント中心線ＣＸ上においてそれに沿って下部基端面５４，５４’と下部先端面５５，５５’の間で細長く形状付けられ得る。これによりファスナーエレメント４，４’が全体としても細長に形状付けられ、金属エレメント調の外観に似せることができる。尚、上部基端面６４，６４’は、ファスナーテープ３，３’のテープ上面３６，３６’上に位置する。上部先端面６５，６５’ は、ファスナーテープ３，３’のテープ面外に位置する。下部基端面５４，５４’は、ファスナーテープ３，３’のテープ下面３７，３７’上に位置する。下部先端面５５，５５’は、ファスナーテープ３，３’のテープ面外に位置する。 The upper element portion 6, 6' may be a substantially rectangular parallelepiped portion elongated (the element width is smaller than the element length) between the upper base end surface 64, 64' and the upper tip surface 65, 65' along the element center line CX. The lower element portion 5, 5' may be elongated between the lower base end surface 54, 54' and the lower tip surface 55, 55' along the element center line CX. This allows the fastener element 4, 4' to be elongated as a whole, and to have an appearance similar to that of a metal element. The upper base end surface 64, 64' is located on the tape upper surface 36, 36' of the fastener tape 3, 3'. The upper tip surface 65, 65' is located outside the tape surface of the fastener tape 3, 3'. The lower base end surface 54, 54' is located on the tape lower surface 37, 37' of the fastener tape 3, 3'. The lower tip surface 55, 55' is located outside the tape surface of the fastener tape 3, 3'.
　各エレメント上部６，６’は、スライドファスナー１の中心線ＣＬに直交するスライドファスナー１の幅方向（例えば、エレメント中心線ＣＸ）に沿って延びる上面６１，６１’と、スライドファスナー１の幅方向（例えば、エレメント中心線ＣＸ）に沿って延びる前側面６２，６２’と、スライドファスナー１の幅方向（例えば、エレメント中心線ＣＸ）に沿って延びる後側面６３，６３’を含む単一の細長形状の部分を含む（模範的な実施形態では、その単一の細長形状の部分から成る）。エレメント上部６，６’は、エレメント中心線ＣＸ上に設けられ、かつエレメント中心線ＣＸに沿って延び、この点は、その単一の細長形状の部分についても同様である。オプションとしては、各エレメント上部６，６’は、上面６１，６１’と前側面６２，６２’の間でスライドファスナー１の幅方向（例えば、エレメント中心線ＣＸ）に沿って延びる第１中間面６６，６６’と、上面６１，６１’と後側面６３，６３’の間でスライドファスナー１の幅方向（例えば、エレメント中心線ＣＸ）に沿って延びる第２中間面６７，６７’を更に含む。第１及び第２中間面６６，６６’，６７，６７’を設けることによりファスナーエレメント４，４’を上面視する時（例えば、図１，３参照）、ファスナーエレメント４，４’をより細幅に見せることができる。尚、単一の細長形状の部分は、上述の略直方体状部分であり得る。 Each element upper portion 6, 6' includes a single elongated portion including an upper surface 61, 61' extending along the width direction of the slide fastener 1 (e.g., the element center line CX) perpendicular to the center line CL of the slide fastener 1, a front side surface 62, 62' extending along the width direction of the slide fastener 1 (e.g., the element center line CX), and a rear side surface 63, 63' extending along the width direction of the slide fastener 1 (e.g., the element center line CX) (in an exemplary embodiment, it is made up of the single elongated portion). The element upper portion 6, 6' is provided on the element center line CX and extends along the element center line CX, and this point is also the same for the single elongated portion. Optionally, each element upper portion 6, 6' further includes a first intermediate surface 66, 66' extending along the width direction of the slide fastener 1 (e.g., element center line CX) between the upper surface 61, 61' and the front side surface 62, 62', and a second intermediate surface 67, 67' extending along the width direction of the slide fastener 1 (e.g., element center line CX) between the upper surface 61, 61' and the rear side surface 63, 63'. By providing the first and second intermediate surfaces 66, 66', 67, 67', the fastener elements 4, 4' can be made to appear thinner when viewed from above (e.g., see Figures 1 and 3). The single elongated portion may be the above-mentioned substantially rectangular parallelepiped portion.
　上面６１，６１’と第１中間面６６，６６’の間に第１境界線Ｌ１が画定され、上面６１，６１’と第２中間面６７，６７’の間に第２境界線Ｌ２が画定され、前側面６２，６２’と第１中間面６６，６６’の間の第３境界線Ｌ３が画定され、後側面６３，６３’と第２中間面６７，６７’の間の第４境界線Ｌ４が画定される（図３参照）。第１中間面６６，６６’は、上面６１，６１’と第１中間面６６，６６’の間の第１境界線Ｌ１から第１中間面６６，６６’と前側面６２，６２’の間の第３境界線Ｌ３まで（例えば、一定又は変化する曲率で及び／又は弧状に）湾曲しながら下方に延びる湾曲面であり得るが、これに限らず、平坦な傾斜面であっても良い。第２中間面６７，６７’は、上面６１，６１’と第２中間面６７，６７’の間の第２境界線Ｌ２から第２中間面６７，６７’と後側面６３，６３’の間の第４境界線Ｌ４まで（例えば、一定又は変化する曲率で及び／又は弧状に）湾曲しながら下方に延びる湾曲面であるが、これに限らず、平坦な傾斜面であっても良い。 A first boundary line L1 is defined between the upper surface 61, 61' and the first intermediate surface 66, 66', a second boundary line L2 is defined between the upper surface 61, 61' and the second intermediate surface 67, 67', a third boundary line L3 is defined between the front side surface 62, 62' and the first intermediate surface 66, 66', and a fourth boundary line L4 is defined between the rear side surface 63, 63' and the second intermediate surface 67, 67' (see FIG. 3). The first intermediate surface 66, 66' may be a curved surface that extends downward while curving (e.g., with a constant or changing curvature and/or in an arc) from the first boundary line L1 between the upper surface 61, 61' and the first intermediate surface 66, 66' to the third boundary line L3 between the first intermediate surface 66, 66' and the front side surface 62, 62', but is not limited thereto and may be a flat inclined surface. The second intermediate surface 67, 67' is a curved surface that extends downward while curving (e.g., with a constant or varying curvature and/or in an arc) from the second boundary line L2 between the upper surface 61, 61' and the second intermediate surface 67, 67' to the fourth boundary line L4 between the second intermediate surface 67, 67' and the rear side surface 63, 63', but is not limited to this and may be a flat inclined surface.
　模範的な形態では、スライドファスナー１の幅方向から観察されるように（例えば、図４参照）、第１及び第２中間面６６，６６’，６７，６７’が一定の曲率の湾曲面であり、実質的に平坦に観察される上面６１，６１’と容易に区別可能である。上面６１，６１’は、完全な平坦面ではなく、エレメント中心線ＣＸから離れるに応じて僅かに湾曲し得るが、その曲率は、第１中間面６６の曲率と比較して極めて小さい（例えば、その１／１０以下）。このようにして第１中間面６６と上面６１，６１’の間に第１境界線Ｌ１を画定することができる。上面６１，６１’と第２中間面６７，６７’の間の第２境界線Ｌ２についても同様である。模範的な形態では、前側面６２及び後側面６３は、図４に示すように一定の斜度の傾斜面、即ち、非湾曲面である。従って、第１中間面６６と前側面６２の境界は、第１中間面６６の湾曲開始点に設定することができる。同様、第２中間面６７と後側面６３の境界は、第２中間面６７の湾曲開始点に設定することができる。 In an exemplary embodiment, as observed in the width direction of the slide fastener 1 (see, for example, FIG. 4), the first and second intermediate surfaces 66, 66', 67, 67' are curved surfaces with a constant curvature and can be easily distinguished from the upper surface 61, 61', which is observed to be substantially flat. The upper surface 61, 61' is not a completely flat surface, and may curve slightly as it moves away from the element center line CX, but the curvature is extremely small compared to the curvature of the first intermediate surface 66 (for example, 1/10 or less). In this way, a first boundary line L1 can be defined between the first intermediate surface 66 and the upper surface 61, 61'. The same is true for the second boundary line L2 between the upper surface 61, 61' and the second intermediate surface 67, 67'. In an exemplary embodiment, the front side surface 62 and the rear side surface 63 are inclined surfaces with a constant inclination, i.e., non-curved surfaces, as shown in FIG. 4. Therefore, the boundary between the first intermediate surface 66 and the front side surface 62 can be set at the curvature start point of the first intermediate surface 66. Similarly, the boundary between the second intermediate surface 67 and the rear side surface 63 can be set at the curvature start point of the second intermediate surface 67.
　ある場合、第１乃至第４境界線Ｌ１，Ｌ２，Ｌ３，Ｌ４が、少なくともファスナーテープ３，３’の側縁部３１，３１’に設けられた芯紐３３の全幅（或いは、後述のエレメント上部６の上面６１の主領域６１ａ）に亘ってお互いに略平行に配向される。これは、上面６１，６１’、前側面６２，６２’、後側面６３，６３’、及び第１及び第２中間面６６，６６’，６７，６７’が同一の方向に平行に延びていることの帰結であり得る。 In some cases, the first to fourth boundary lines L1, L2, L3, and L4 are oriented approximately parallel to each other at least across the entire width of the core cord 33 provided on the side edge portions 31, 31' of the fastener tapes 3, 3' (or across the main region 61a of the upper surface 61 of the element upper portion 6 described below). This may be a consequence of the upper surfaces 61, 61', the front side surfaces 62, 62', the rear side surfaces 63, 63', and the first and second intermediate surfaces 66, 66', 67, 67' extending parallel to each other in the same direction.
　第１境界線Ｌ１と第２境界線Ｌ２の間の間隔は、上部基端面６４に接近するに従って僅かに増加し得る。第３境界線Ｌ３と第４境界線Ｌ４の間の間隔は、上部基端面６４，６４’に接近するに従って僅かに増加し得る。第１境界線Ｌ１と第２境界線Ｌ２の間の間隔は、上部先端面６５，６５’に接近するに従って僅かに増加し得る。第３境界線Ｌ３と第４境界線Ｌ４の間の間隔は、上部先端面６５，６５’に接近するに従って僅かに増加し得る。即ち、第１境界線Ｌ１及び／又は第３境界線Ｌ３は、各々、上部基端面６４，６４’又は上部先端面６５，６５’に接近するに従って前方に傾斜する傾斜線を含むことができる。同様、第２境界線Ｌ２及び／又は第４境界線Ｌ４は、各々、上部基端面６４，６４’又は上部先端面６５，６５’に接近するに従って後方に傾斜する傾斜線を含むことができる。 The distance between the first boundary line L1 and the second boundary line L2 may increase slightly as it approaches the upper base end surface 64. The distance between the third boundary line L3 and the fourth boundary line L4 may increase slightly as it approaches the upper base end surface 64, 64'. The distance between the first boundary line L1 and the second boundary line L2 may increase slightly as it approaches the upper tip surface 65, 65'. The distance between the third boundary line L3 and the fourth boundary line L4 may increase slightly as it approaches the upper tip surface 65, 65'. That is, the first boundary line L1 and/or the third boundary line L3 may each include a slanted line that slopes forward as it approaches the upper base end surface 64, 64' or the upper tip surface 65, 65'. Similarly, the second boundary line L2 and/or the fourth boundary line L4 may each include a slanted line that slopes rearward as it approaches the upper base end surface 64, 64' or the upper tip surface 65, 65'.
　エレメント上部６は、（上面視して）エレメント中心線ＣＸに沿って細長い矩形状の輪郭を有する。エレメント上部６の上面６１も同様、（上面視して）エレメント中心線ＣＸに沿って細長い矩形状の輪郭を有する。エレメント上部６及び上面６１の細長形状のため、ファスナーエレメント４は、実際には樹脂製エレメントであるが金属製エレメントの如く見える。 The element upper part 6 has an elongated rectangular outline along the element center line CX (when viewed from above). The upper surface 61 of the element upper part 6 also has an elongated rectangular outline along the element center line CX (when viewed from above). Due to the elongated shape of the element upper part 6 and upper surface 61, the fastener element 4 appears to be a metal element, even though it is actually a plastic element.
　本実施形態では、左右一対のファスナーストリンガー２，２’の一方に含まれる個々のファスナーエレメント４と左右一対のファスナーストリンガー２，２’の他方に含まれる個々のファスナーエレメント４’が係合したスライドファスナー１の閉状態で、ファスナーエレメント４，４’のエレメント上部６，６’は、スライドファスナー１の中心線ＣＬを跨がないように（換言すれば、交差しないように）形状付けられる。換言すれば、ファスナーエレメント４，４’のエレメント上部６，６’は、上面６１，６１’、前側面６２，６２’、後側面６３，６３’、及び上部先端面６５，６５’のいずれも、スライドファスナー１の中心線ＣＬを跨がないように（換言すれば、交差しないように）形状付けられる。この場合、ファスナーエレメントの細幅化を更に促進してスライダーの摺動抵抗を更に低下させることを促進可能である。より具体的には、ファスナーエレメント４，４’の外観は、金属製エレメントの形状に忠実に似せるよりは、むしろ金属製エレメントとは異なる形状であるが、金属製エレメントをモチーフとしてそれに似せることができる。この結果、個々のファスナーエレメント４，４’の細幅化が促進可能となり、これと同時にファスナーエレメント４，４’の狭ピッチ化が促進されてスライダー９の摺動抵抗が低下する（即ち、より小さい力でスライダー９を動かしてスライドファスナー１を開閉することができる）。場合によっては、ファスナーエレメント４，４’の機械的強度が高められ、及び／又はファスナーエレメント４，４’の射出成形用の金型の簡素化も促進され得る。 In this embodiment, in the closed state of the slide fastener 1 in which the individual fastener elements 4 included in one of the pair of left and right fastener stringers 2, 2' and the individual fastener elements 4' included in the other of the pair of left and right fastener stringers 2, 2' are engaged, the element upper parts 6, 6' of the fastener elements 4, 4' are shaped so as not to straddle (in other words, not to cross) the center line CL of the slide fastener 1. In other words, the element upper parts 6, 6' of the fastener elements 4, 4' are shaped so that the upper surfaces 61, 61', the front side surfaces 62, 62', the rear side surfaces 63, 63', and the upper tip surfaces 65, 65' do not straddle (in other words, not to cross) the center line CL of the slide fastener 1. In this case, it is possible to further promote the narrowing of the fastener elements and further promote the reduction of the sliding resistance of the slider. More specifically, the appearance of the fastener elements 4, 4' can be made to resemble a metal element using a motif of a metal element, although it has a different shape from the metal element, rather than being faithful to the shape of the metal element. As a result, it is possible to promote the narrowing of the individual fastener elements 4, 4', and at the same time promote the narrowing of the pitch of the fastener elements 4, 4', thereby reducing the sliding resistance of the slider 9 (i.e., the slider 9 can be moved with less force to open and close the slide fastener 1). In some cases, the mechanical strength of the fastener elements 4, 4' can be increased, and/or the mold for injection molding the fastener elements 4, 4' can be simplified.
　念のため述べれば、ファスナーエレメント４，４’の細幅化は、ファスナーエレメント４，４’のピッチＰｉを低減させ、スライドファスナー１の開閉のためのスライダー９の摺動抵抗も低減させ得る。即ち、より軽い力でスライダー９を動かしてスライドファスナー１を開閉することが促進される。 Just to be clear, narrowing the fastener elements 4, 4' reduces the pitch Pi of the fastener elements 4, 4', and can also reduce the sliding resistance of the slider 9 for opening and closing the slide fastener 1. In other words, it is easier to open and close the slide fastener 1 by moving the slider 9 with less force.
　図１に示すように、ファスナーエレメント４，４’が係合する時、これらのエレメント上部６，６’がスライドファスナー１の中心線ＣＬの両側でジグザグ態様に配置される。同様、ファスナーエレメント４，４’が係合する時、左側のファスナーエレメント４のエレメント上部６の上面６１と右側のファスナーエレメント４’のエレメント上部６’の上面６１が、スライドファスナー１の中心線ＣＬの両側でジグザグ態様に配置される。エレメント上部６，６’がスライドファスナー１の幅方向でお互いに対向する部分を有し、従って、スライドファスナー１が捻れてもエレメント上部６，６’の干渉によってファスナーエレメント４，４’の係合が外れてしまうことが抑制される。 As shown in FIG. 1, when the fastener elements 4, 4' are engaged, the element upper parts 6, 6' are arranged in a zigzag pattern on both sides of the center line CL of the slide fastener 1. Similarly, when the fastener elements 4, 4' are engaged, the upper surface 61 of the element upper part 6 of the left fastener element 4 and the upper surface 61 of the element upper part 6' of the right fastener element 4' are arranged in a zigzag pattern on both sides of the center line CL of the slide fastener 1. The element upper parts 6, 6' have portions that face each other in the width direction of the slide fastener 1, so that even if the slide fastener 1 is twisted, interference between the element upper parts 6, 6' prevents the fastener elements 4, 4' from becoming disengaged.
　図３を参照して述べると、スライドファスナー１の閉状態で、左右一対のファスナーストリンガー２，２’の異なるファスナーストリンガー２，２’に設けられ、かつスライドファスナー１の中心線ＣＬ上で隣接して係合する前側及び後側のファスナーエレメントＥ１，Ｅ２それぞれにおいて、少なくともファスナーテープ３，３’の側縁部３１，３１’に設けられた芯紐３３，３３’上で第１境界線Ｌ１に接すると共にスライドファスナー１の幅方向に平行に延びる第１仮想線ＤＬ１と、少なくともファスナーテープ３，３’の側縁部３１，３１’に設けられた芯紐３３，３３’上で第２境界線Ｌ２に接すると共にスライドファスナー１の幅方向に平行に延びる第２仮想線ＤＬ２を設定する時、後側のファスナーエレメントＥ２の第１仮想線ＤＬ１と前側のファスナーエレメントＥ１の第２仮想線ＤＬ２が両者の間に隙間ＳＰを空けて交差することなく延びるようにファスナーエレメント４，４’のエレメント上部６，６’が形状付けられる。これによりエレメント上部６，６’の上面６１，６１’を十分に細幅化することができる。第１仮想線ＤＬ１は、スライドファスナー１の幅方向に平行な線をエレメント中心線ＣＸから前方に平行移動した時に第１境界線Ｌ１に接した（ファスナーエレメント４，４’に関して内接した）時の位置にある。同様、第２仮想線ＤＬ２は、スライドファスナー１の幅方向に平行な線をエレメント中心線ＣＸから後方に平行移動した時に第２境界線Ｌ２に接した（ファスナーエレメント４，４’に関して内接した）時の位置にある。第３及び第４境界線Ｌ３，Ｌ４についても第３及び第４仮想線を同様に設定することができる。 Referring to Figure 3, when the slide fastener 1 is in a closed state, in each of the front and rear fastener elements E1, E2 provided on different fastener stringers 2, 2' of a pair of left and right fastener stringers 2, 2' and adjacently engaged on the center line CL of the slide fastener 1, when a first imaginary line DL1 is set which is tangent to the first boundary line L1 at least on the core strings 33, 33' provided on the side edges 31, 31' of the fastener tapes 3, 3' and extends parallel to the width direction of the slide fastener 1, and a second imaginary line DL2 is set which is tangent to the second boundary line L2 at least on the core strings 33, 33' provided on the side edges 31, 31' of the fastener tapes 3, 3' and extends parallel to the width direction of the slide fastener 1, the element upper parts 6, 6' of the fastener elements 4, 4' are shaped so that the first imaginary line DL1 of the rear fastener element E2 and the second imaginary line DL2 of the front fastener element E1 extend without intersecting with a gap SP between them. This allows the upper surfaces 61, 61' of the element upper portions 6, 6' to be sufficiently narrowed. The first virtual line DL1 is located at a position where a line parallel to the width direction of the slide fastener 1 is in contact with the first boundary line L1 (inscribed with respect to the fastener elements 4, 4') when moved forward in parallel from the element center line CX. Similarly, the second virtual line DL2 is located at a position where a line parallel to the width direction of the slide fastener 1 is in contact with the second boundary line L2 (inscribed with respect to the fastener elements 4, 4') when moved backward in parallel from the element center line CX. The third and fourth virtual lines can be set in the same manner for the third and fourth boundary lines L3, L4.
　追加又は代替として、スライドファスナー１の閉状態で、前側のファスナーエレメントＥ１の第２仮想線ＤＬ２は、後側のファスナーエレメントＥ２の前側面６２，６２’と第１中間面６６，６６’の間の第３境界線Ｌ３，Ｌ３’に一致又は近接して延びる。これにより、左右のエレメント上部６，６’の上面６１，６１’の適度な幅を確保することができる。追加又は代替として、前側及び後側のファスナーエレメントＥ１，Ｅ２それぞれにおいて、第１仮想線ＤＬ１と第２仮想線ＤＬ２の間で定まるファスナーエレメント４，４’のエレメント上部６，６’の上面６１，６１’の幅Ｗ６１は、ファスナーテープ３，３’に接し、かつスライドファスナー１の幅方向に沿って延びる前側面６２，６２’の下辺と、ファスナーテープ３，３’に接し、かつスライドファスナー１の幅方向に沿って延びる後側面６３，６３’の下辺から定まるエレメント上部６，６’の幅Ｗ６の１／２値に０．８を乗算した下限値と１／２値に１．２を乗算した上限値から定まる範囲内に属する。左右のエレメント上部６，６’の上面６１，６１’の幅を極端に小さくするとファスナーエレメント４，４’の外観が金属製エレメントから離れて似なくなることに留意されたい。一例としては、エレメント上部６の幅Ｗ６は、１．３ｍｍ以上である。エレメント上部６の長さＬ６は、２．９ｍｍ以上である。 Additionally or alternatively, when the slide fastener 1 is in the closed state, the second imaginary line DL2 of the front fastener element E1 extends coincident with or adjacent to the third boundary line L3, L3' between the front side surface 62, 62' and the first intermediate surface 66, 66' of the rear fastener element E2. This ensures an appropriate width for the upper surfaces 61, 61' of the left and right element upper parts 6, 6'. Additionally or alternatively, in each of the front and rear fastener elements E1 and E2, the width W61 of the upper surface 61, 61' of the element upper portion 6, 6' of the fastener element 4, 4' determined between the first virtual line DL1 and the second virtual line DL2 falls within a range determined by a lower limit value obtained by multiplying 1/2 the width W6 of the element upper portion 6, 6' determined by the lower side of the front side surface 62, 62' that contacts the fastener tape 3, 3' and extends along the width direction of the slide fastener 1 and the lower side of the rear side surface 63, 63' that contacts the fastener tape 3, 3' and extends along the width direction of the slide fastener 1, by 0.8, and an upper limit value obtained by multiplying 1/2 the width W6 by 1.2. Please note that if the widths of the upper surfaces 61, 61' of the left and right element upper portions 6, 6' are made extremely small, the appearance of the fastener element 4, 4' will become far removed from and will no longer resemble a metal element. As an example, the width W6 of the element upper portion 6 is 1.3 mm or more. The length L6 of the upper part 6 of the element is 2.9 mm or more.
　左側のファスナーエレメント４のエレメント上部６の上面６１の幅が第１仮想線ＤＬ１及び第２仮想線ＤＬ２により画定されると理解できるが、第１境界線Ｌ１と第２境界線Ｌ２の間で画定されると理解することもできる。なお、各エレメント上部６の前側面６２及び後側面６３の傾斜のため、エレメント上部６の上面６１の幅は、同じ方向でのエレメント上部６の幅よりも小さい。 The width of the top surface 61 of the element upper portion 6 of the left fastener element 4 can be understood to be defined by the first imaginary line DL1 and the second imaginary line DL2, but can also be understood to be defined between the first boundary line L1 and the second boundary line L2. Note that due to the inclination of the front side surface 62 and the rear side surface 63 of each element upper portion 6, the width of the top surface 61 of the element upper portion 6 is smaller than the width of the element upper portion 6 in the same direction.
　上述した隙間ＳＰは、前側及び後側のファスナーエレメントＥ１，Ｅ２の一つのファスナーエレメントにおける第１仮想線ＤＬ１と第２仮想線ＤＬ２の間隔の１／３以下であり得、及び／又は、第１仮想線ＤＬ１と第２仮想線ＤＬ２の間隔の１／５以上であり得る。隙間ＳＰのサイズを適切にすることで上面６１，６１’を適切な幅にすることができる。 The above-mentioned gap SP may be 1/3 or less of the distance between the first virtual line DL1 and the second virtual line DL2 in one fastener element of the front and rear fastener elements E1, E2, and/or may be 1/5 or more of the distance between the first virtual line DL1 and the second virtual line DL2. By setting the size of the gap SP appropriately, the upper surfaces 61, 61' can be made to an appropriate width.
　図２に示すように、各ファスナーエレメント４について、エレメント上部６の幅Ｗ６とエレメント上部６の高さＨ６は、０．８＜（Ｈ６／Ｗ６）＜０．９５を満足し得る。エレメント上部６を細幅にすることによりファスナーテープ３，３’に対するファスナーエレメント４の取付強度が低下してしまうおそれがあるが、幅Ｗ６に対して高さＨ６を相対的に増加することにより取付強度の低下を補うことができる。なお、高さＨ６は、ファスナーテープ３，３’のテープ上面３６，３６’又はこれが含まれる平面からエレメント上部６の上面６１（例えば、後述の主領域６１ａ）までの距離に等しい。尚、特許文献１に開示のファスナーエレメントは、その突出の程度を押さえるため、（Ｈ６／Ｗ６）＜０．８の条件にて設計されている。 As shown in FIG. 2, for each fastener element 4, the width W6 of the element upper portion 6 and the height H6 of the element upper portion 6 can satisfy 0.8<(H6/W6)<0.95. Although there is a risk that the attachment strength of the fastener element 4 to the fastener tapes 3, 3' may be reduced by narrowing the width of the element upper portion 6, the reduction in attachment strength can be compensated for by increasing the height H6 relative to the width W6. The height H6 is equal to the distance from the tape upper surface 36, 36' of the fastener tapes 3, 3' or a plane including this to the upper surface 61 of the element upper portion 6 (for example, the main region 61a described below). The fastener element disclosed in Patent Document 1 is designed under the condition of (H6/W6)<0.8 in order to suppress the degree of its protrusion.
　上述の前側面６２，６２’及び後側面６３，６３’は、ファスナーテープ３，３’のテープ上面３６，３６’に対して垂直な面ではなく、傾斜した面であると良い。具体的には、前側面６２，６２’は、上面６１，６１’から前方に延びるに応じて、ファスナーテープ３，３’のテープ上面３６，３６’に接近する下り傾斜面である。同様、後側面６３，６３’は、上面６１，６１’から後方に延びるに応じて、ファスナーテープ３，３’のテープ上面３６，３６’に接近する下り傾斜面である。ファスナーエレメント４，４’の細幅化を促進するため、前側面６２，６２’及び後側面６３，６３’は、各々、ファスナーテープ３，３’のテープ上面３６，３６’に対して７５°～８５°の範囲内の角度を成すことが望ましい。また、これらの前側面６２，６２’及び後側面６３，６３’の傾斜のため、各ファスナーエレメント４，４’の各エレメント上部６，６’は、上面６１，６１’から離れるに応じて幅広になる。例えば、この結果、各エレメント上部６，６’は、テーパー形状を有する。 The above-mentioned front side surface 62, 62' and rear side surface 63, 63' are preferably inclined surfaces rather than perpendicular to the tape upper surface 36, 36' of the fastener tape 3, 3'. Specifically, the front side surface 62, 62' is a downwardly inclined surface that approaches the tape upper surface 36, 36' of the fastener tape 3, 3' as it extends forward from the upper surface 61, 61'. Similarly, the rear side surface 63, 63' is a downwardly inclined surface that approaches the tape upper surface 36, 36' of the fastener tape 3, 3' as it extends rearward from the upper surface 61, 61'. In order to promote narrowing of the fastener element 4, 4', it is desirable that the front side surface 62, 62' and rear side surface 63, 63' each form an angle within the range of 75° to 85° with respect to the tape upper surface 36, 36' of the fastener tape 3, 3'. In addition, due to the inclination of the front side 62, 62' and the rear side 63, 63', the upper portion 6, 6' of each fastener element 4, 4' becomes wider as it moves away from the upper surface 61, 61'. For example, as a result, each upper portion 6, 6' of the element has a tapered shape.
　図４に示すように、幾つかの場合、スライドファスナー１の閉状態で、前側のファスナーエレメント４の後側面６３と、後側のファスナーエレメント４の前側面６２’をスライドファスナー１の幅方向に沿って共通の平面まで平行移動する時、前側のファスナーエレメント４の後側面６３と後側のファスナーエレメント４’の前側面６２’は、頂角が鋭角な二等辺三角形ＲＣの等辺の少なくとも一部を形成する。換言すれば、共通の平面上に平行移動した前側のファスナーエレメント４の後側面６３を含む斜線と後側のファスナーエレメント４’の前側面６２’を含む斜線が、頂角が鋭角な二等辺三角形ＲＣの等辺を形成する。このようにして左右のファスナーエレメント４，４’の（スライドファスナー１の中心線ＣＬに関する）対称性が高められる。 As shown in FIG. 4, in some cases, when the rear side 63 of the front fastener element 4 and the front side 62' of the rear fastener element 4 are moved parallel to a common plane along the width direction of the slide fastener 1 in the closed state of the slide fastener 1, the rear side 63 of the front fastener element 4 and the front side 62' of the rear fastener element 4' form at least a part of the equilateral sides of an isosceles triangle RC with an acute apex angle. In other words, the oblique line including the rear side 63 of the front fastener element 4 and the oblique line including the front side 62' of the rear fastener element 4' moved parallel to a common plane form the equilateral sides of an isosceles triangle RC with an acute apex angle. In this way, the symmetry of the left and right fastener elements 4, 4' (with respect to the center line CL of the slide fastener 1) is enhanced.
　図５の参照から理解できるように、スライドファスナー１の閉状態で、前側及び後側のファスナーエレメントＥ１，Ｅ２の前側のファスナーエレメント４の上部先端面６５と、前側及び後側のファスナーエレメントＥ１，Ｅ２の後側のファスナーエレメント４’の上部先端面６５’をスライドファスナー１の中心線ＣＬに沿って共通の平面まで平行移動する時、前側のファスナーエレメント４の上部先端面６５と後側のファスナーエレメント４’の上部先端面６５’は、頂角が鋭角な二等辺三角形の等辺の少なくとも一部を形成する。換言すれば、共通の平面上に平行移動した前側のファスナーエレメント４の上部先端面６５を含む斜線と後側のファスナーエレメント４’の上部先端面６５’を含む斜線が、頂角が鋭角な二等辺三角形ＲＣ１の等辺を形成する。このようにして左右のファスナーエレメント４，４’の（スライドファスナー１の中心線ＣＬに関する）対称性が高められる。なお、図４に示した二等辺三角形ＲＣと図５に示した二等辺三角形ＲＣ１は、前者が頂角が上向きであり、後者は頂角が下向きである。二等辺三角形ＲＣの頂角の角度は、好適には、１０°～４０°の範囲内、より好適には、１５°～３０°の範囲内である。二等辺三角形ＲＣ１の頂角の角度は、好適には、５°～２０°の範囲内、より好適には、７°～１３°の範囲内である。 As can be understood from FIG. 5, when the upper end surface 65 of the front fastener element 4 of the front and rear fastener elements E1, E2 and the upper end surface 65' of the rear fastener element 4' of the front and rear fastener elements E1, E2 are moved parallel to a common plane along the center line CL of the slide fastener 1, the upper end surface 65 of the front fastener element 4 and the upper end surface 65' of the rear fastener element 4' form at least a part of the equilateral sides of an isosceles triangle with an acute apex angle. In other words, the oblique line including the upper end surface 65 of the front fastener element 4 moved parallel to a common plane and the oblique line including the upper end surface 65' of the rear fastener element 4' form the equilateral sides of an isosceles triangle RC1 with an acute apex angle. In this way, the symmetry of the left and right fastener elements 4, 4' (with respect to the center line CL of the slide fastener 1) is enhanced. Note that the isosceles triangle RC shown in FIG. 4 and the isosceles triangle RC1 shown in FIG. 5 have an apex angle that faces upwards, while the apex angle of the isosceles triangle RC faces downwards. The apex angle of the isosceles triangle RC is preferably in the range of 10° to 40°, and more preferably in the range of 15° to 30°. The apex angle of the isosceles triangle RC1 is preferably in the range of 5° to 20°, and more preferably in the range of 7° to 13°.
　以下、ファスナーエレメント４，４’の形状について限定の意図なく詳細に説明する。エレメント上部６，６’は、ファスナーテープ３，３’に関して上方に設けられたブロック状部分であり、上面６１，６１’、前側面６２，６２’、後側面６３，６３’、上部基端面６４，６４’、及び上部先端面６５，６５’を有する。エレメント上部６，６’は、典型的には、このエレメント上部６，６’を含むファスナーエレメント４，４’の係合相手のファスナーエレメント４，４’のエレメント上部６，６’に係合しないように構成される（即ち、係合構造（例えば、１以上の係合部及び１以上の被係合部のペア）を含まない）。ファスナーエレメント４，４’の係合機能は、専らエレメント下部５，５’により確保され得る。 The shape of the fastener elements 4, 4' will be described in detail below without any intention of limitation. The element upper part 6, 6' is a block-shaped part provided above the fastener tapes 3, 3', and has an upper surface 61, 61', a front side surface 62, 62', a rear side surface 63, 63', an upper base end surface 64, 64', and an upper tip surface 65, 65'. The element upper part 6, 6' is typically configured not to engage with the element upper part 6, 6' of the fastener element 4, 4' that is the engaging partner of the fastener element 4, 4' including this element upper part 6, 6' (i.e., it does not include an engaging structure (e.g., a pair of one or more engaging parts and one or more engaged parts)). The engaging function of the fastener element 4, 4' can be ensured solely by the element lower part 5, 5'.
　前側面６２，６２’、後側面６３，６３’、上部基端面６４，６４’、及び上部先端面６５，６５’は、各々、エレメント上部６，６’の側面の一つである。前側面６２，６２’及び後側面６３，６３’は、ファスナーテープ３，３’の側縁部３１，３１’に直交又は略直交するように平行に延びる。より詳細には、前側面６２，６２’及び後側面６３，６３’は、エレメント中心線ＣＸに沿って上部基端面６４，６４’と上部先端面６５，６５’の間を延びる。上部基端面６４，６４’は、ファスナーテープ３，３’のテープ面上にあり、詳細には、ファスナーテープ３，３’のテープ上面３６，３６’から上方に起立する。上部先端面６５，６５’は、ファスナーテープ３，３’のテープ面外にあり、詳細には、後述の中間面７，７’から上方に起立する。尚、上部先端面６５，６５’は、上部基端面６４，６４’から見てファスナーテープ３，３’のテープ外方に位置し、詳細には、ファスナーテープ３，３’の側縁部３１を超えてファスナーテープ３，３’のテープ外方に上部基端面６４，６４’から離れて位置する。好適には、各側面の結合箇所の角部が面取りされて丸み付けられる。テープ外方は、あるファスナーストリンガーに関して、ファスナーテープのテープ面上の位置からテープ面外の位置に向かう方向を意味し、典型的には、ファスナーテープの側縁部（又は芯紐）に直交する。 The front side 62, 62', rear side 63, 63', upper base end surface 64, 64', and upper tip surface 65, 65' are each one of the side surfaces of the element upper portion 6, 6'. The front side 62, 62' and rear side 63, 63' extend parallel to the side edge portion 31, 31' of the fastener tape 3, 3' so as to be perpendicular or nearly perpendicular to the side edge portion 31, 31' of the fastener tape 3, 3'. More specifically, the front side 62, 62' and rear side 63, 63' extend between the upper base end surface 64, 64' and the upper tip surface 65, 65' along the element center line CX. The upper base end surface 64, 64' is on the tape surface of the fastener tape 3, 3', and more specifically, stands upward from the tape upper surface 36, 36' of the fastener tape 3, 3'. The upper tip surface 65, 65' is outside the tape surface of the fastener tape 3, 3', and specifically, it stands upward from the intermediate surface 7, 7' described below. The upper tip surface 65, 65' is located outside the tape surface of the fastener tape 3, 3' when viewed from the upper base end surface 64, 64', and specifically, it is located away from the upper base end surface 64, 64' beyond the side edge portion 31 of the fastener tape 3, 3' and outside the tape surface of the fastener tape 3, 3'. Preferably, the corners of the joining points of each side surface are chamfered and rounded. The tape outside means, for a certain fastener stringer, the direction from a position on the tape surface of the fastener tape to a position outside the tape surface, and typically perpendicular to the side edge portion (or core string) of the fastener tape.
　上面６１，６１’は、上述のようにエレメント中心線ＣＸに沿って細長い矩形状の輪郭を有し得る。追加又は代替として、上面６１，６１’の幅をＷ６１とし、上面６１，６１’の長さをＬ６１とする時（図７参照）、１．７＜Ｌ６１／Ｗ６１＜２．３を満足し得る。上面６１，６１’の矩形状の輪郭に含まれる２つの長辺に第１中間面６６，６６’及び第２中間面６７，６７’（これらが省略される場合には、前側面６２，６２’及び後側面６３，６３’）が個別に結合する。上面６１，６１’の矩形状の輪郭に含まれる２つの短辺に上部基端面６４，６４’及び上部先端面６５，６５’が個別に結合する。好適には、上面６１，６１’と上述の各面の結合箇所の角部が面取りされて丸み付けられる。前側面６２、後側面６３，６３’、上部基端面６４及び上部先端面６５の傾斜のため、上面６１は、エレメント上部６の上面視形状（輪郭）よりも縮小した領域となり得る。 The upper surface 61, 61' may have an elongated rectangular contour along the element center line CX as described above. Additionally or alternatively, when the width of the upper surface 61, 61' is W61 and the length of the upper surface 61, 61' is L61 (see FIG. 7), 1.7 < L61/W61 < 2.3 may be satisfied. The first intermediate surface 66, 66' and the second intermediate surface 67, 67' (if these are omitted, the front side surface 62, 62' and the rear side surface 63, 63') are individually connected to the two long sides included in the rectangular contour of the upper surface 61, 61'. The upper base end surface 64, 64' and the upper tip surface 65, 65' are individually connected to the two short sides included in the rectangular contour of the upper surface 61, 61'. Preferably, the corners of the connection points between the upper surface 61, 61' and each of the above-mentioned surfaces are chamfered and rounded. Due to the inclination of the front side surface 62, the rear side surfaces 63, 63', the upper base end surface 64, and the upper tip surface 65, the upper surface 61 can be an area that is smaller than the top view shape (contour) of the upper element surface 6.
　上面６１，６１’を細幅に見せるために前側面６２，６２’及び後側面６３，６３’を傾斜付けると良い。即ち、前側面６２，６２’は、上面６１，６１’（又は第１中間面６６，６６’）から下方に延びるに応じてエレメント中心線ＣＸから離れるように傾斜し、後側面６３，６３’は、上面６１，６１’（又は第２中間面６７，６７’）から下方に延びるに応じてエレメント中心線ＣＸから離れるように傾斜する（図９及び図１０参照）。この結果、エレメント上部６，６’は、エレメント中心線ＣＸに沿う方向から見て台形に形状付けられる。ここで、上面６１，６１’が台形の上底に一致する。 In order to make the top surfaces 61, 61' appear narrower, it is advisable to incline the front side surfaces 62, 62' and the rear side surfaces 63, 63'. That is, the front side surfaces 62, 62' are inclined away from the element center line CX as they extend downward from the top surfaces 61, 61' (or the first intermediate surfaces 66, 66'), and the rear side surfaces 63, 63' are inclined away from the element center line CX as they extend downward from the top surfaces 61, 61' (or the second intermediate surfaces 67, 67') (see Figures 9 and 10). As a result, the element upper portions 6, 6' are shaped like a trapezoid when viewed in a direction along the element center line CX. Here, the top surfaces 61, 61' coincide with the upper base of the trapezoid.
　上部基端面６４，６４’は、上面６１，６１’から下方に延びるに応じて上部先端面６５，６５’から離れるように傾斜し、上部先端面６５，６５’は、上面６１，６１’から下方に延びるに応じて上部基端面６４，６４’から離れるように傾斜し得る（図５参照）。ファスナーテープ３，３’のテープ上面３６，３６’が存在する平面を基準とする時、その平面と上部基端面６４のなす角θ64（図５参照）は、その平面と前側面６２のなす角θ62（図１０参照）よりも大きく、その平面と後側面６３，６３’のなす角θ63（図１０参照）よりも大きいと良い。その平面と上部先端面６５のなす角θ65についても同様である。なす角θ62となす角θ63の相対的に緩慢な傾斜により、エレメント上部６の細長形状の外観とファスナーエレメント４の取付強度が上手く両立される。 The upper base end surface 64, 64' may be inclined away from the upper tip surface 65, 65' as it extends downward from the upper surface 61, 61', and the upper tip surface 65, 65' may be inclined away from the upper base end surface 64, 64' as it extends downward from the upper surface 61, 61' (see FIG. 5). When the plane on which the tape upper surfaces 36, 36' of the fastener tapes 3, 3' are present is taken as a reference, the angle θ 64 (see FIG. 5) between the plane and the upper base end surface 64 is preferably larger than the angle θ 62 (see FIG. 10) between the plane and the front side surface 62 and larger than the angle θ 63 (see FIG. 10) between the plane and the rear side surface 63, 63'. The same is true for the angle θ 65 between the plane and the upper tip surface 65. The relatively gentle inclination of the angle θ 62 and the angle θ 63 satisfactorily achieves both the appearance of the elongated shape of the element upper portion 6 and the mounting strength of the fastener element 4 .
　エレメント上部６，６’の上面６１，６１’は、２次元的な単一面から成り、又は２次元的に連続した複数面から成り得る。後者の場合、上面６１，６１’は、図４に示すように、主領域６１ａと、第１傾斜領域６１ｂと、第２傾斜領域６１ｃの合計３つの領域から成り得る（図５参照）。第１傾斜領域６１ｂは、主領域６１ａと上部基端面６４の上端の間において第１所定角度θ61bで緩慢に傾斜する。第２傾斜領域６１ｃは、主領域６１ａと上部先端面６５の上端の間において第２所定角度θ61cで緩慢に傾斜する。 The upper surface 61, 61' of the element upper portion 6, 6' may be composed of a two-dimensional single surface or two-dimensionally continuous multiple surfaces. In the latter case, the upper surface 61, 61' may be composed of a total of three regions, a main region 61a, a first inclined region 61b, and a second inclined region 61c, as shown in Fig. 4 (see Fig. 5). The first inclined region 61b is gently inclined at a first predetermined angle θ 61b between the main region 61a and the upper end of the upper base end surface 64. The second inclined region 61c is gently inclined at a second predetermined angle θ 61c between the main region 61a and the upper end of the upper tip surface 65.
　主領域６１ａは、ファスナーテープ３，３’のテープ上面３６，３６’又はこれを含む平面に対して平行に配向された平坦面であり得る。第１所定角度θ61bは、主領域６１ａが存在する平面と第１傾斜領域６１ｂのなす角度であり得る。第２所定角度θ61cは、主領域６１ａが存在する平面と第２傾斜領域６１ｃのなす角度であり得る。有利には、第２所定角度θ61cは、第１所定角度θ61bよりも小さい。これにより上部先端面６５に十分な高さを持たせやすくなり、例えば、スライドファスナー１が捻られる時にエレメント上部６，６’同士が干渉してファスナーエレメント４，４’の係合が外れることが抑制される。 The main region 61a may be a flat surface oriented parallel to the tape upper surface 36, 36' of the fastener tape 3, 3' or a plane including the tape upper surface 36, 36'. The first predetermined angle θ 61b may be an angle between the plane on which the main region 61a exists and the first inclined region 61b. The second predetermined angle θ 61c may be an angle between the plane on which the main region 61a exists and the second inclined region 61c. Advantageously, the second predetermined angle θ 61c is smaller than the first predetermined angle θ 61b . This makes it easier to provide the upper end surface 65 with a sufficient height, and for example, when the slide fastener 1 is twisted, the element upper portions 6, 6' interfere with each other, suppressing the disengagement of the fastener elements 4, 4'.
　図５を参照して更に説明すると、上部基端面６４は、位置Ｐ１と位置Ｐ２の間で急峻に上方に延びる。上面６１は、位置Ｐ２と位置Ｐ５の間を延びる。詳細には、第１傾斜領域６１ｂは、位置Ｐ２から位置Ｐ３に向けて緩慢に上方に傾斜する。主領域６１ａは、位置Ｐ３と位置Ｐ４の間を水平に延びる。第２傾斜領域６１ｃは、位置Ｐ４から位置Ｐ５に向けて緩慢に下方に傾斜する。上部先端面６５は、位置Ｐ５と位置Ｐ６の間で急峻に下方に延びる。位置Ｐ１と位置Ｐ２の間の距離と位置Ｐ５と位置Ｐ６の間の距離は、いずれも位置Ｐ２と位置Ｐ５の間の距離に比べて十分に小さい。 Further explaining with reference to FIG. 5, the upper base end surface 64 extends steeply upward between positions P1 and P2. The upper surface 61 extends between positions P2 and P5. In detail, the first inclined region 61b slopes gently upward from position P2 to position P3. The main region 61a extends horizontally between positions P3 and P4. The second inclined region 61c slopes gently downward from position P4 to position P5. The upper tip surface 65 extends steeply downward between positions P5 and P6. The distance between positions P1 and P2 and the distance between positions P5 and P6 are both sufficiently smaller than the distance between positions P2 and P5.
　上述のように、エレメント下部５，５’は、エレメント中心線ＣＸに沿って下部基端面５４，５４’と下部先端面５５，５５’の間で細長く、かつ下部基端面５４，５４’と下部先端面５５，５５’の間で少なくとも一つの係合部５８及び少なくとも一つの被係合部５９を有するように形状付けられる。エレメント下部５は、典型的には、このエレメント下部５を含むファスナーエレメント４の係合相手の２つのファスナーエレメント４’，４’の各エレメント下部５’，５’に係合するように構成される。この目的のために係合部５８及び被係合部５９が適切に形状付けられる。係合部５８は、典型的には、スライドファスナー１の中心線ＣＬ又はこれに平行な軸線に沿って突出する。被係合部５９は、典型的には、スライドファスナー１の中心線ＣＬ又はこれに平行な軸線に沿って凹む。 As described above, the element lower portion 5, 5' is shaped to be elongated between the lower base end surface 54, 54' and the lower tip surface 55, 55' along the element center line CX, and to have at least one engaging portion 58 and at least one engaged portion 59 between the lower base end surface 54, 54' and the lower tip surface 55, 55'. The element lower portion 5 is typically configured to engage with each of the element lower portions 5', 5' of the two fastener elements 4', 4' that are engaged with the fastener element 4 including this element lower portion 5. For this purpose, the engaging portion 58 and the engaged portion 59 are appropriately shaped. The engaging portion 58 typically protrudes along the center line CL of the slide fastener 1 or an axis parallel thereto. The engaged portion 59 is typically recessed along the center line CL of the slide fastener 1 or an axis parallel thereto.
　下部基端面５４，５４’は、ファスナーテープ３，３’のテープ下面３７から下方に起立する。下部先端面５５，５５’は、ファスナーテープ３，３’の側縁部３１を超えてファスナーテープ３，３’のテープ外方に下部基端面５４，５４’から離れて（即ち、ファスナーテープ３，３’のテープ面外に）位置する。下部先端面５５，５５’は、ファスナーエレメント４のエレメント中心軸ＣＸ上で最も突出した湾曲面であり得る。下部先端面５５，５５’は、図５に示すように、位置Ｐ８から位置Ｐ７に向けて急峻に下方に傾斜する。下部先端面５５，５５’は、位置Ｐ７の近傍で緩慢な湾曲面を含むことができる。 The lower base end surface 54, 54' rises downward from the tape underside surface 37 of the fastener tape 3, 3'. The lower tip surface 55, 55' is located beyond the side edge portion 31 of the fastener tape 3, 3' and away from the lower base end surface 54, 54' toward the outside of the fastener tape 3, 3' (i.e., outside the tape surface of the fastener tape 3, 3'). The lower tip surface 55, 55' may be the curved surface that protrudes most on the element center axis CX of the fastener element 4. The lower tip surface 55, 55' slopes steeply downward from position P8 toward position P7 as shown in FIG. 5. The lower tip surface 55, 55' may include a gently curved surface in the vicinity of position P7.
　幾つかの場合、上部先端面６５が下部先端面５５，５５’よりもファスナーテープ３，３’の側縁部３１（又は芯紐３３）寄りにオフセットして設けられ、下部先端面５５，５５’と上部先端面６５の間に中間面７，７’が形成される。これによりエレメント上部６，６’の細幅化を優先し易くなる。これに際して、エレメント上部６，６’の細幅のおかげで金属製エレメント似のファスナーエレメント４の外観を確保することができる。斯くして、金属製エレメントをモチーフとした金属製エレメント似の細幅のファスナーエレメント４を提供することができる。 In some cases, the upper end surface 65 is offset closer to the side edge 31 (or core string 33) of the fastener tape 3, 3' than the lower end surface 55, 55', and an intermediate surface 7, 7' is formed between the lower end surface 55, 55' and the upper end surface 65. This makes it easier to prioritize narrowing the width of the element upper portion 6, 6'. In this case, the narrow width of the element upper portion 6, 6' ensures that the appearance of the fastener element 4 resembles a metallic element. In this way, it is possible to provide a narrow fastener element 4 similar to a metallic element, with a metallic element motif.
　中間面７，７’は、エレメント厚み方向に直交する平坦面であり得、必ずしもこの限りではないが、ファスナーテープ３，３’と同一平面に位置し得る。好適には、中間面７，７’は、ファスナーテープ３，３’のテープ上面３６，３６’と同一平面に位置し、又は、ファスナーテープ３，３’のテープ下面３７よりもテープ上面３６，３６’に近い平面に位置する。この場合、中間面７，７’の下方のエレメント下部５，５’の厚みを十分に確保することができ、ファスナーエレメント４，４’同士の係合強さを高めることができる。典型的には、上部先端面６５と中間面７，７’のなす角θ１は、９０°と１００°の間の範囲内の角度に等しい（図５参照）。下部先端面５５，５５’と中間面７，７’のなす角θ55は、８０°と９０°の間の範囲内の角度に等しい（図５参照）。中間面７，７’を傾斜面又は非平坦面とすることも可能である。 The intermediate surfaces 7, 7' may be flat surfaces perpendicular to the element thickness direction, and may be, but are not limited to, flush with the fastener tapes 3, 3'. Preferably, the intermediate surfaces 7, 7' are flush with the tape upper surfaces 36, 36' of the fastener tapes 3, 3', or are in a plane closer to the tape upper surfaces 36, 36' than the tape lower surfaces 37 of the fastener tapes 3, 3'. In this case, the thickness of the element lower parts 5, 5' below the intermediate surfaces 7, 7' can be sufficiently secured, and the engagement strength between the fastener elements 4, 4' can be increased. Typically, the angle θ1 between the upper tip surface 65 and the intermediate surfaces 7, 7' is equal to an angle in the range between 90° and 100° (see FIG. 5). The angle θ55 between the lower tip surface 55, 55' and the intermediate surfaces 7, 7' is equal to an angle in the range between 80° and 90° (see FIG. 5). The intermediate surfaces 7, 7' can also be inclined or non-flat.
　中間面７，７’の上面視形状（或いはファスナーエレメント４，４’が非係合時のその露出形状）は、エレメント下部５，５’の係合構造に依存し得る。典型的には、（ｉ）中間面７，７’の幅は、エレメント中心線ＣＸ沿いに上部先端面６５から離れるに応じて漸増し、続いて漸減する；及び／又は、中間面７，７’は、上部先端面６５により円弧が切除された正円形状の輪郭を有する。 The top view shape of the intermediate surfaces 7, 7' (or the exposed shape when the fastener elements 4, 4' are disengaged) may depend on the engagement structure of the lower element portions 5, 5'. Typically, (i) the width of the intermediate surfaces 7, 7' increases and then decreases as they move away from the upper end surface 65 along the element centerline CX; and/or the intermediate surfaces 7, 7' have a circular contour with an arc cut off by the upper end surface 65.
　図３から理解できるように、ファスナーエレメント４の中間面７は、係合相手の２つのファスナーエレメント４’，４’のエレメント上部６’，６’（例えば、後述の肩部８）が個別に載置される２つの載置領域７１と、これらの２つの載置領域７１の間の中間領域７２を含み得る。中間領域７２の面積は、２つの載置領域７１の面積の合計値の０．５倍～１．５倍の範囲内であり得る。ファスナーエレメント４’についても同様である。ファスナーエレメント４，４’が係合する時、それらの中間領域７２，７２’が（上面視して）視認可能である。この時、中間領域７２，７２’は、エレメント上部６，６’の間（及びそれらの上面６１，６１’の間）で奥側に位置し、目立たない。 As can be seen from FIG. 3, the intermediate surface 7 of the fastener element 4 may include two mounting areas 71 on which the upper element portions 6', 6' (e.g., shoulder portions 8 described below) of the two mating fastener elements 4', 4' are individually mounted, and an intermediate area 72 between these two mounting areas 71. The area of the intermediate area 72 may be within a range of 0.5 to 1.5 times the total area of the two mounting areas 71. The same applies to the fastener element 4'. When the fastener elements 4, 4' are engaged, their intermediate areas 72, 72' are visible (when viewed from above). At this time, the intermediate areas 72, 72' are located at the back between the element upper portions 6, 6' (and between their upper surfaces 61, 61') and are not noticeable.
　図示例を含む幾つかの場合、エレメント下部５は、下部基端面５４を有する基部５１、下部先端面５５を有する頭部５３、及び基部５１と頭部５３の間で最小のエレメント幅を有するように括れた形状の首部５２を含む。頭部５３は、少なくとも一つの係合部５８としてテープ長さ方向において反対側に突出する二つの係合部５８を含む（図６参照）。首部５２は、少なくとも一つの被係合部５９として首部５２の括れを形成するように凹設された二つの被係合部５９を含む。エレメント下部５’についても同様である。 In some cases, including the illustrated example, the element lower part 5 includes a base part 51 having a lower base end surface 54, a head part 53 having a lower tip end surface 55, and a neck part 52 that is narrowed so as to have a minimum element width between the base part 51 and the head part 53. The head part 53 includes at least one engaging part 58, which are two engaging parts 58 that protrude on opposite sides in the tape length direction (see FIG. 6). The neck part 52 includes at least one engaged part 59, which are two engaged parts 59 that are recessed so as to form a narrowing of the neck part 52. The same is true for the element lower part 5'.
　基部５１は、エレメント上部６，６’と略同幅に形成される。即ち、基部５１の幅Ｗ５１は、エレメント上部６，６’の幅Ｗ６と同等である。従って、エレメント下部５，５’の構造に基づいてファスナーエレメント４のピッチＰｉを決定することができる。尚、エレメント中心線ＣＸ沿いにおける基部５１の長さは、エレメント上部６，６’の長さＬ６よりも短い。下部基端面５４，５４’は、ファスナーテープ３，３’を挟んでエレメント上部６，６’の上部基端面６４，６４’の反対側に位置する。基部５１は、エレメント幅方向に直交するように設けられた二つの側面５１２，５１３を有し、いずれもエレメント中心線ＣＸに沿って延びて芯紐３３を跨ぐ（図８参照）。 The base 51 is formed to have approximately the same width as the upper element parts 6, 6'. That is, the width W51 of the base 51 is equal to the width W6 of the upper element parts 6, 6'. Therefore, the pitch Pi of the fastener element 4 can be determined based on the structure of the lower element parts 5, 5'. The length of the base 51 along the element center line CX is shorter than the length L6 of the upper element parts 6, 6'. The lower base end faces 54, 54' are located on the opposite side of the upper base end faces 64, 64' of the upper element parts 6, 6' across the fastener tapes 3, 3'. The base 51 has two side faces 512, 513 that are arranged perpendicular to the element width direction, and both extend along the element center line CX and straddle the core string 33 (see Figure 8).
　首部５２は、エレメント下部５，５’において最もエレメント幅が狭い幅Ｗ５２を有する（図８参照）。頭部５３は、基部５１以外のエレメント下部５，５’において最もエレメント幅が広い幅Ｗ５３を有する。エレメント下部５，５’は、基部５１と首部５２の中間位置（即ち、首部開始位置）からテープ外方に延びるに応じて幅Ｗ５２に到達するまで漸減する幅を有し、幅Ｗ５２を通過した後、幅Ｗ５３に到達するまで漸増する幅を有する。この結果、首部５２が括れを持つように形状付けられ、かつ各被係合部５９が半円柱状の受容空間を持つように形状付けられる。頭部５３の幅は、幅Ｗ５３からテープ外方に漸減する。基部５１、首部５２、及び頭部５３の各下面が同一平面に形成され、エレメント下部５，５’の一つの下面５６を形成する。基部５１、首部５２、及び頭部５３の各側面が連続して一つの輪郭を形成する。図５に示すように、基部５１は、位置Ｐ１１と位置Ｐ１２の間で規定される幅を持つ芯紐３３とこれに隣接するファスナーテープ３，３’の一部に固着する。 The neck 52 has a width W52 that is the narrowest in the lower element portion 5, 5' (see FIG. 8). The head 53 has a width W53 that is the widest in the lower element portion 5, 5' other than the base 51. The lower element portion 5, 5' has a width that gradually decreases from the intermediate position between the base 51 and the neck 52 (i.e., the neck start position) to the width W52 as it extends outward from the tape, and after passing the width W52, has a width that gradually increases to the width W53. As a result, the neck 52 is shaped to have a constriction, and each engaged portion 59 is shaped to have a semi-cylindrical receiving space. The width of the head 53 gradually decreases from the width W53 to the width W53. The lower surfaces of the base 51, neck 52, and head 53 are formed in the same plane, forming one lower surface 56 of the lower element portion 5, 5'. The side surfaces of the base 51, neck 52, and head 53 are continuous to form one contour. As shown in FIG. 5, the base 51 is fixed to the core cord 33, which has a width defined between positions P11 and P12, and to a portion of the fastener tape 3, 3' adjacent to the core cord 33.
　二つの係合部５８は、各々、ファスナーエレメント４のエレメント中心線ＣＸにより区分され、及び／又は、エレメント中心線ＣＸに関して鏡像対称であり得る（即ち、各々が半円柱状部分となる）。同様、二つの被係合部５９は、ファスナーエレメント４のエレメント中心線ＣＸにより区分され、及び／又は、エレメント中心線ＣＸに関して鏡像対称であり得る（即ち、各々が、半円柱状の受容空間を有する部分となる）。 The two engaging portions 58 may each be separated by the element center line CX of the fastener element 4 and/or may be mirror-symmetrical about the element center line CX (i.e., each is a semi-cylindrical portion). Similarly, the two engaged portions 59 may each be separated by the element center line CX of the fastener element 4 and/or may be mirror-symmetrical about the element center line CX (i.e., each is a portion having a semi-cylindrical receiving space).
　二つの被係合部５９は、各々、エレメント上部６，６’の二つの肩部８により少なくとも部分的に上方から閉鎖される（図６参照）。肩部８は、ファスナーエレメント４を下面視する時、首部５２の両側に配置される（図８参照）。左右のファスナーエレメント４，４’が係合する時、左右一方側のファスナーエレメント４の頭部５３が、左右他方側で隣接するファスナーエレメント４’の首部５２’の間に挿入されて保持される。この時、その頭部５３が、それらのファスナーエレメント４’の肩部８’の直下に配され、その上方変位が規制される。即ち、ファスナーエレメント４の肩部は、係合相手のファスナーエレメント４’の変位を規制する部分として機能する。有利にも、肩部８は、ブロック状のエレメント上部６，６’の一部分を形成し、（エレメント上部６，６’を上面視した時）肩部として区別可能な形状を有しない。 The two engaged portions 59 are at least partially closed from above by the two shoulders 8 of the upper element portions 6, 6' (see FIG. 6). The shoulders 8 are arranged on both sides of the neck portion 52 when the fastener element 4 is viewed from below (see FIG. 8). When the left and right fastener elements 4, 4' are engaged, the head portion 53 of the fastener element 4 on one side is inserted and held between the neck portions 52' of the adjacent fastener element 4' on the other side. At this time, the head portion 53 is arranged directly below the shoulder portions 8' of the fastener elements 4', and its upward displacement is restricted. In other words, the shoulder portions of the fastener element 4 function as portions that restrict the displacement of the fastener element 4' that is engaged with it. Advantageously, the shoulder portions 8 form part of the block-shaped upper element portions 6, 6' of the elements, and do not have a shape that can be distinguished as a shoulder portion (when the upper element portions 6, 6' of the elements are viewed from above).
　上部先端面６５は、エレメント中心線ＣＸに沿う方向において首部５２における最小のエレメント幅Ｗ５２の位置よりもファスナーテープ３，３’のテープ外方に位置付けられる（図５乃至図８参照）。これによりエレメント上部６，６’をより長く形成することができ、及び／又は、肩部８に十分な面積を持たせることができる。追加又は代替として、上部先端面６５は、エレメント中心線ＣＸに沿う方向において下部先端面５５，５５’又はその最先端位置と比較して首部５２における最小のエレメント幅Ｗ５２の位置寄りに位置付けられる。即ち、図８に示した長さＬ８は、長さＬ９よりも小さい。この場合、中間面７，７’の長さＬ７を十分に確保することができる（図７参照）。なお、中間面７，７’の長さＬ７を長くすることにより左右のファスナーエレメント４，４’が係合した時の安定性が高められる。 The upper end surface 65 is positioned outside the fastener tape 3, 3' in the direction along the element center line CX relative to the position of the minimum element width W52 in the neck portion 52 (see Figures 5 to 8). This allows the element upper portion 6, 6' to be formed longer and/or allows the shoulder portion 8 to have a sufficient area. Additionally or alternatively, the upper end surface 65 is positioned closer to the position of the minimum element width W52 in the neck portion 52 compared to the lower end surface 55, 55' or its most distal end position in the direction along the element center line CX. That is, the length L8 shown in Figure 8 is smaller than the length L9. In this case, the length L7 of the intermediate surface 7, 7' can be sufficiently secured (see Figure 7). By increasing the length L7 of the intermediate surface 7, 7', the stability when the left and right fastener elements 4, 4' are engaged is improved.
　スライドファスナー１の製造方法は、上述の説明から当業者には明らかであり省略する。ファスナーエレメント４の射出成形用の金型のキャビティー形状は、比較的シンプルな形状のエレメント上部６，６’のおかげで簡素化される。エレメント上部６，６’の側面（例えば、前側面６２及び後側面６３）の傾斜が金型キャビティーからのファスナーエレメント４の抜き勾配として働く。エレメント上部６，６’の上面６１，６１’の成形用のキャビティー面以外の場所（例えば、下部先端面５５，５５’）にゲート位置を設定すると良い。これにより上面６１，６１’の高い平坦度及び／又は平滑度を確保することができる。下部先端面５５，５５’は、ゲート痕を有し得る。ファスナーエレメント４の外面が高い平滑度を有するように金型のキャビティー面も高い平滑度を有すると良い。 The manufacturing method of the slide fastener 1 is omitted because it is obvious to those skilled in the art from the above description. The cavity shape of the mold for injection molding the fastener element 4 is simplified thanks to the relatively simple shape of the upper element parts 6, 6'. The inclination of the side surfaces (e.g., the front side surface 62 and the rear side surface 63) of the upper element parts 6, 6' serves as the draft angle of the fastener element 4 from the mold cavity. It is preferable to set the gate position at a location (e.g., the lower end surface 55, 55') other than the molding cavity surface of the upper surface 61, 61' of the upper element part 6, 6'. This ensures high flatness and/or smoothness of the upper surface 61, 61'. The lower end surface 55, 55' may have a gate mark. It is preferable that the cavity surface of the mold also has high smoothness so that the outer surface of the fastener element 4 has high smoothness.
　上面６１，６１’に金属箔を貼り付け、光沢度合いを高めることもできる。この場合、第１傾斜領域６１ｂ及び第２傾斜領域６１ｃのためにより広い角度範囲に亘って光の反射を確保することができる。この点は、金属箔を設けない場合にも同じく当てはまることに留意されたい。 Metal foil can be applied to the upper surfaces 61, 61' to increase the glossiness. In this case, the first inclined region 61b and the second inclined region 61c can ensure light reflection over a wider range of angles. Please note that this also applies when no metal foil is provided.
　上述の教示を踏まえ、当業者は、各実施形態に対して様々な変更を加えることができる。請求の範囲に盛り込まれた符号は、参考のためであり、請求の範囲を限定解釈する目的で参照されるべきものではない。 In light of the above teachings, those skilled in the art may make various modifications to each embodiment. The reference symbols included in the claims are for reference purposes only and should not be used to interpret the claims in a limited manner.
１　　　　　：スライドファスナー
２　　　　　：ファスナーストリンガー
３　　　　　：ファスナーテープ
４　　　　　：ファスナーエレメント
５　　　　　：エレメント下部
６　　　　　：エレメント上部
７　　　　　：中間面
８　　　　　：肩部
９　　　　　：スライダー
５１　　　　：基部
５２　　　　：首部
５３　　　　：頭部
５４　　　　：下部基端面
５５　　　　：下部先端面
５８　　　　：係合部
５９　　　　：被係合部
６１　　　　：上面
６１ａ　　　：主領域
６１ｂ　　　：第１傾斜領域
６１ｃ　　　：第２傾斜領域
６２　　　　：前側面
６３　　　　：後側面
６４　　　　：上部基端面
６５　　　　：上部先端面
７１　　　　：載置領域
７２　　　　：中間領域 1: Slide fastener 2: Fastener stringer 3: Fastener tape 4: Fastener element 5: Lower element 6: Upper element 7: Middle surface 8: Shoulder 9: Slider 51: Base 52: Neck 53: Head 54: Lower base end surface 55: Lower tip surface 58: Engagement portion 59: Engaged portion 61: Upper surface 61a: Main region 61b: First inclined region 61c: Second inclined region 62: Front side 63: Rear side 64: Upper base end surface 65: Upper tip surface 71: Placement region 72: Middle region

Claims (21)

  1. 　スライドファスナー（１）であって、
    　左右一対のファスナーストリンガー（２，２’）にして、各ファスナーストリンガー（２，２’）は、ファスナーテープ（３，３’）と、前記ファスナーテープ（３，３’）の側縁部（３１，３１’）に所定ピッチで取り付けられた複数のファスナーエレメント（４，４’）を含み、各ファスナーエレメント（４，４’）は、前記ファスナーテープ（３，３’）が存在する平面に関して下方及び上方に各々が設けられたエレメント下部（５，５’）及びエレメント上部（６，６’）を含み、前記エレメント下部（５，５’）が、少なくとも一つの係合部（５８）及び少なくとも一つの被係合部（５９）を有する、左右一対のファスナーストリンガー（２，２’）と、
    　前記左右一対のファスナーストリンガー（２，２’）の一方に含まれる個々のファスナーエレメント（４）と前記左右一対のファスナーストリンガー（２，２’）の他方に含まれる個々のファスナーエレメント（４’）を互い違いに係合させるべく前記スライドファスナー（１）の中心線（ＣＬ）上を前進し、かつそれらの係合解除のために前記スライドファスナー（１）の中心線（ＣＬ）上を後進するスライダー（９）を備え、
    　前記各ファスナーエレメント（４，４’）の前記エレメント上部（６，６’）は、前記スライドファスナー（１）の中心線（ＣＬ）に直交する前記スライドファスナー（１）の幅方向に沿って延びる上面（６１，６１’）と、前記スライドファスナー（１）の幅方向に沿って延びる前側面（６２，６２’）と、前記スライドファスナー（１）の幅方向に沿って延びる後側面（６３，６３’）を含む単一の細長形状の部分を含み、
    　前記左右一対のファスナーストリンガー（２，２’）の一方に含まれる個々のファスナーエレメント（４）と前記左右一対のファスナーストリンガー（２，２’）の他方に含まれる個々のファスナーエレメント（４’）が係合した前記スライドファスナー（１）の閉状態で、前記各ファスナーエレメント（４，４’）の前記エレメント上部（６，６’）は、前記スライドファスナー（１）の中心線（ＣＬ）を跨がないように形状付けられる、スライドファスナー。     A slide fastener (1),
    a pair of left and right fastener stringers (2, 2'), each of which includes a fastener tape (3, 3') and a plurality of fastener elements (4, 4') attached to a side edge portion (31, 31') of the fastener tape (3, 3') at a predetermined pitch, each fastener element (4, 4') including an element lower portion (5, 5') and an element upper portion (6, 6') respectively provided below and above a plane in which the fastener tape (3, 3') exists, each of the element lower portions (5, 5') having at least one engaging portion (58) and at least one engaged portion (59);
    a slider (9) which advances on a center line (CL) of the slide fastener (1) to alternately engage individual fastener elements (4) included in one of the pair of left and right fastener stringers (2, 2') with individual fastener elements (4') included in the other of the pair of left and right fastener stringers (2, 2'), and which moves backward on the center line (CL) of the slide fastener (1) to release the engagement between them;
    The element upper portion (6, 6') of each fastener element (4, 4') includes a single elongated portion including an upper surface (61, 61') extending along the width direction of the slide fastener (1) perpendicular to the center line (CL) of the slide fastener (1), a front side surface (62, 62') extending along the width direction of the slide fastener (1), and a rear side surface (63, 63') extending along the width direction of the slide fastener (1),
    a slide fastener in which, in a closed state of the slide fastener (1) in which an individual fastener element (4) included in one of the pair of left and right fastener stringers (2, 2') and an individual fastener element (4') included in the other of the pair of left and right fastener stringers (2, 2') are engaged, the element upper parts (6, 6') of the fastener elements (4, 4') are shaped so as not to straddle a center line (CL) of the slide fastener (1).
  2. 　前記各ファスナーエレメント（４，４’）の前記エレメント上部（６，６’）は、前記上面（６１，６１’）と前記前側面（６２，６２’）の間で前記スライドファスナー（１）の幅方向に沿って延びる第１中間面（６６，６６’）と、前記上面（６１，６１’）と前記後側面（６３，６３’）の間で前記スライドファスナー（１）の幅方向に沿って延びる第２中間面（６７，６７’）を更に含み、前記上面（６１，６１’）と前記第１中間面（６６，６６’）の間に第１境界線（Ｌ１）が画定され、前記上面（６１，６１’）と前記第２中間面（６７，６７’）の間に第２境界線（Ｌ２）が画定される請求項１に記載のスライドファスナーであって、
    　前記スライドファスナー（１）の前記閉状態で、前記左右一対のファスナーストリンガー（２，２’）の異なるファスナーストリンガー（２，２’）に設けられ、かつ前記スライドファスナー（１）の中心線（ＣＬ）上で隣接して係合する前側及び後側のファスナーエレメント（Ｅ１，Ｅ２）それぞれにおいて、少なくとも前記ファスナーテープ（３，３’）の側縁部（３１，３１’）に設けられた芯紐（３３，３３’）上で前記第１境界線（Ｌ１）に接すると共に前記スライドファスナー（１）の幅方向に平行に延びる第１仮想線（ＤＬ１）と、少なくとも前記ファスナーテープ（３，３’）の側縁部（３１，３１’）に設けられた芯紐（３３，３３’）上で前記第２境界線（Ｌ２）に接すると共に前記スライドファスナー（１）の幅方向に平行に延びる第２仮想線（ＤＬ２）を設定する時、前記後側のファスナーエレメント（Ｅ２）の前記第１仮想線（ＤＬ１）と前記前側のファスナーエレメント（Ｅ１）の前記第２仮想線（ＤＬ２）が両者の間に隙間（ＳＰ）を空けて交差することなく延びるように前記各ファスナーエレメント（４，４’）の前記エレメント上部（６，６’）が形状付けられる、スライドファスナー。     The element upper portion (6, 6') of each fastener element (4, 4') further includes a first intermediate surface (66, 66') extending along the width direction of the slide fastener (1) between the upper surface (61, 61') and the front side surface (62, 62') and a second intermediate surface (67, 67') extending along the width direction of the slide fastener (1) between the upper surface (61, 61') and the rear side surface (63, 63'), a first boundary line (L1) is defined between the upper surface (61, 61') and the first intermediate surface (66, 66'), and a second boundary line (L2) is defined between the upper surface (61, 61') and the second intermediate surface (67, 67'),
    In the closed state of the slide fastener (1), in each of the front and rear fastener elements (E1, E2) that are provided on different fastener stringers (2, 2') of the pair of left and right fastener stringers (2, 2') and that are adjacently engaged on the center line (CL) of the slide fastener (1), at least a first virtual line (DL1) that is in contact with the first boundary line (L1) on a core string (33, 33') provided on a side edge portion (31, 31') of the fastener tape (3, 3') and that extends parallel to the width direction of the slide fastener (1); When a second imaginary line (DL2) is set on a core string (33, 33') provided on a side edge portion (31, 31') of a fastener tape (3, 3') so as to be in contact with the second boundary line (L2) and extend parallel to the width direction of the slide fastener (1), the element upper portions (6, 6') of the fastener elements (4, 4') are shaped so that the first imaginary line (DL1) of the rear fastener element (E2) and the second imaginary line (DL2) of the front fastener element (E1) extend with a gap (SP) between them without intersecting.
  3. 　前記スライドファスナー（１）の前記閉状態で、前記前側のファスナーエレメント（Ｅ１）の前記第２仮想線（ＤＬ２）は、前記後側のファスナーエレメント（Ｅ２）の前記前側面（６２，６２’）と前記第１中間面（６６，６６’）の間の第３境界線（Ｌ３）に一致又は近接して延びる、請求項２に記載のスライドファスナー。 The slide fastener according to claim 2, wherein, in the closed state of the slide fastener (1), the second imaginary line (DL2) of the front fastener element (E1) coincides with or extends adjacent to a third boundary line (L3) between the front side surface (62, 62') and the first intermediate surface (66, 66') of the rear fastener element (E2).
  4. 　前記前側及び後側のファスナーエレメント（Ｅ１，Ｅ２）それぞれにおいて、
    　前記第１仮想線（ＤＬ１）と前記第２仮想線（ＤＬ２）の間で定まる前記ファスナーエレメント（４，４’）の前記エレメント上部（６，６’）の前記上面（６１，６１’）の幅（Ｗ６１）は、前記ファスナーテープ（３，３’）に接し、かつ前記スライドファスナー（１）の幅方向に沿って延びる前記前側面（６２，６２’）の下辺と、前記ファスナーテープ（３，３’）に接し、かつ前記スライドファスナー（１）の幅方向に沿って延びる前記後側面（６３，６３’）の下辺から定まる前記エレメント上部（６，６’）の幅（Ｗ６）の１／２値に０．８を乗算した下限値と前記１／２値に１．２を乗算した上限値から定まる範囲内に属する、請求項２又は３に記載のスライドファスナー。     In each of the front and rear fastener elements (E1, E2),
    4. The slide fastener according to claim 2 or 3, wherein a width (W61) of the upper surface (61, 61') of the element upper portion (6, 6') of the fastener element (4, 4') determined between the first virtual line (DL1) and the second virtual line (DL2) falls within a range determined by a lower limit value obtained by multiplying 1/2 of a width (W6) of the element upper portion (6, 6') determined by a lower side of the front side surface (62, 62') that contacts the fastener tape (3, 3') and extends along the width direction of the slide fastener (1) and a lower side of the rear side surface (63, 63') that contacts the fastener tape (3, 3') and extends along the width direction of the slide fastener (1) by 0.8 and an upper limit value obtained by multiplying the 1/2 value by 1.2.
  5. 　前記前側面（６２，６２’）と前記第１中間面（６６，６６’）の間の第３境界線（Ｌ３）が画定され、前記後側面（６３）と前記第２中間面（６７，６７’）の間の第４境界線（Ｌ４）が画定され、前記第１乃至第４境界線（Ｌ１，Ｌ２，Ｌ３，Ｌ４）が、少なくとも前記ファスナーテープ（３，３’）の側縁部（３１，３１’）に設けられた芯紐（３３，３３’）の全幅に亘ってお互いに略平行に配向される、請求項２乃至４のいずれか一項に記載のスライドファスナー。 A slide fastener according to any one of claims 2 to 4, wherein a third boundary line (L3) is defined between the front side surface (62, 62') and the first intermediate surface (66, 66'), a fourth boundary line (L4) is defined between the rear side surface (63) and the second intermediate surface (67, 67'), and the first to fourth boundary lines (L1, L2, L3, L4) are oriented approximately parallel to each other at least over the entire width of the core string (33, 33') provided on the side edge portion (31, 31') of the fastener tape (3, 3').
  6. 　前記隙間（ＳＰ）は、前記前側及び後側のファスナーエレメント（Ｅ１，Ｅ２）の一つのファスナーエレメントにおける前記第１仮想線（ＤＬ１）と前記第２仮想線（ＤＬ２）の間隔の１／３以下である、請求項２乃至５に記載のいずれか一項に記載のスライドファスナー。 The slide fastener according to any one of claims 2 to 5, wherein the gap (SP) is 1/3 or less of the distance between the first imaginary line (DL1) and the second imaginary line (DL2) in one of the front and rear fastener elements (E1, E2).
  7. 　前記隙間（ＳＰ）は、前記第１仮想線（ＤＬ１）と前記第２仮想線（ＤＬ２）の間隔の１／５以上である、請求項６に記載のスライドファスナー。 The slide fastener according to claim 6, wherein the gap (SP) is at least 1/5 of the distance between the first virtual line (DL1) and the second virtual line (DL2).
  8. 　前記各ファスナーエレメント（４，４’）の前記エレメント上部（６，６’）は、前記上面（６１，６１’）と前記前側面（６２，６２’）の間で前記スライドファスナー（１）の幅方向に沿って延びる第１中間面（６６，６６’）と、前記上面（６１，６１’）と前記後側面（６３，６３’）の間で前記スライドファスナー（１）の幅方向に沿って延びる第２中間面（６７，６７’）を更に含み、
    　前記第１中間面（６６，６６’）は、前記上面（６１，６１’）と前記第１中間面（６６，６６’）の間の第１境界線（Ｌ１）から前記第１中間面（６６，６６’）と前記前側面（６２，６２’）の間の第３境界線（Ｌ３）まで湾曲しながら下方に延びる湾曲面であり、
    　前記第２中間面（６７，６７’）は、前記上面（６１，６１’）と前記第２中間面（６７，６７’）の間の第２境界線（Ｌ２）から前記第２中間面（６７，６７’）と前記後側面（６３，６３’）の間の第４境界線（Ｌ４）まで湾曲しながら下方に延びる湾曲面である、請求項１乃至７のいずれか一項に記載のスライドファスナー。     The element upper portion (6, 6') of each fastener element (4, 4') further includes a first intermediate surface (66, 66') extending along the width direction of the slide fastener (1) between the upper surface (61, 61') and the front side surface (62, 62'), and a second intermediate surface (67, 67') extending along the width direction of the slide fastener (1) between the upper surface (61, 61') and the rear side surface (63, 63'),
    The first intermediate surface (66, 66') is a curved surface that extends downward while curving from a first boundary line (L1) between the upper surface (61, 61') and the first intermediate surface (66, 66') to a third boundary line (L3) between the first intermediate surface (66, 66') and the front side surface (62, 62'),
    A slide fastener according to any one of claims 1 to 7, wherein the second intermediate surface (67, 67') is a curved surface extending downwardly while curving from a second boundary line (L2) between the upper surface (61, 61') and the second intermediate surface (67, 67') to a fourth boundary line (L4) between the second intermediate surface (67, 67') and the rear side surface (63, 63').
  9. 　前記各ファスナーエレメント（４，４’）の前記エレメント上部（６，６’）は、前記前側面（６２，６２’）及び前記後側面（６３）の傾斜によって前記上面（６１，６１’）から離れるに応じて幅広になる、請求項１乃至８のいずれか一項に記載のスライドファスナー。 The slide fastener according to any one of claims 1 to 8, wherein the element upper portion (6, 6') of each fastener element (4, 4') becomes wider as it moves away from the upper surface (61, 61') due to the inclination of the front side surface (62, 62') and the rear side surface (63).
  10. 　前記前側面（６２，６２’）及び前記後側面（６３）は、各々、前記ファスナーテープ（３，３’）のテープ上面（３６）に対して７５°～８５°の範囲内の角度を成す、請求項１乃至９のいずれか一項に記載のスライドファスナー。 The slide fastener according to any one of claims 1 to 9, wherein the front side surface (62, 62') and the rear side surface (63) each form an angle within the range of 75° to 85° with respect to the tape upper surface (36) of the fastener tape (3, 3').
  11. 　前記スライドファスナー（１）の前記閉状態で、前記前側及び後側のファスナーエレメント（Ｅ１，Ｅ２）の前記前側のファスナーエレメント（Ｅ１）の前記後側面（６３）と、前記前側及び後側のファスナーエレメント（Ｅ１，Ｅ２）の前記後側のファスナーエレメント（Ｅ２）の前記前側面（６２’）を前記スライドファスナー（１）の幅方向に沿って共通の平面まで平行移動する時、前記前側のファスナーエレメント（Ｅ１）の前記後側面（６３）と前記後側のファスナーエレメント（Ｅ２）の前記前側面（６２’）は、頂角が鋭角な二等辺三角形の等辺の少なくとも一部を形成する、請求項１乃至１０のいずれか一項に記載のスライドファスナー。 The slide fastener according to any one of claims 1 to 10, wherein when the rear side surface (63) of the front fastener element (E1) of the front and rear fastener elements (E1, E2) and the front side surface (62') of the rear fastener element (E2) of the front and rear fastener elements (E1, E2) are moved parallel to a common plane along the width direction of the slide fastener (1) in the closed state of the slide fastener (1), the rear side surface (63) of the front fastener element (E1) and the front side surface (62') of the rear fastener element (E2) form at least a part of an equilateral side of an isosceles triangle with an acute apex angle.
  12. 　前記各ファスナーエレメント（４，４’）の前記エレメント上部（６，６’）は、前記ファスナーテープ（３，３’）のテープ面上に位置する上部基端面（６４，６４’）と、前記ファスナーテープ（３，３’）のテープ面外に位置する上部先端面（６５，６５’）を有し、
    　前記スライドファスナー（１）の前記閉状態で、前記左右一対のファスナーストリンガー（２，２’）の一方に含まれる個々のファスナーエレメント（４）の前記上部先端面（６５，６５’）と前記左右一対のファスナーストリンガー（２，２’）の他方に含まれる個々のファスナーエレメント（４’）の前記上部先端面（６５’）が、前記スライドファスナー（１）の中心線（ＣＬ）の両側に交互に配置される、請求項１乃至１１のいずれか一項に記載のスライドファスナー。     The element upper portion (6, 6') of each fastener element (4, 4') has an upper base end surface (64, 64') positioned on the tape surface of the fastener tape (3, 3') and an upper tip surface (65, 65') positioned outside the tape surface of the fastener tape (3, 3'),
    A slide fastener according to any one of claims 1 to 11, wherein, in the closed state of the slide fastener (1), the upper tip surfaces (65, 65') of the individual fastener elements (4) included in one of the pair of left and right fastener stringers (2, 2') and the upper tip surfaces (65') of the individual fastener elements (4') included in the other of the pair of left and right fastener stringers (2, 2') are alternately arranged on both sides of a center line (CL) of the slide fastener (1).
  13. 　前記各ファスナーエレメント（４，４’）の前記エレメント上部（６，６’）は、前記ファスナーテープ（３，３’）のテープ面上に位置する上部基端面（６４，６４’）と、前記ファスナーテープ（３，３’）のテープ面外に位置する上部先端面（６５，６５’）を有し、
    　前記スライドファスナー（１）の前記閉状態で、前記前側及び後側のファスナーエレメント（Ｅ１，Ｅ２）の前記前側のファスナーエレメント（Ｅ１）の前記上部先端面（６５）と、前記前側及び後側のファスナーエレメント（Ｅ１，Ｅ２）の前記後側のファスナーエレメント（Ｅ２）の前記上部先端面（６５’）を前記スライドファスナー（１）の中心線（ＣＬ）に沿って共通の平面まで平行移動する時、前記前側のファスナーエレメント（Ｅ１）の前記上部先端面（６５）と前記後側のファスナーエレメント（Ｅ２）の前記上部先端面（６５’）は、頂角が鋭角な二等辺三角形の等辺の少なくとも一部を形成する、請求項１乃至１２のいずれか一項に記載のスライドファスナー。     The element upper portion (6, 6') of each fastener element (4, 4') has an upper base end surface (64, 64') positioned on the tape surface of the fastener tape (3, 3') and an upper tip surface (65, 65') positioned outside the tape surface of the fastener tape (3, 3'),
    The slide fastener according to any one of claims 1 to 12, wherein when the slide fastener (1) is in the closed state, the upper tip surface (65) of the front fastener element (E1) of the front and rear fastener elements (E1, E2) and the upper tip surface (65') of the rear fastener element (E2) of the front and rear fastener elements (E1, E2) are moved parallel to a common plane along a center line (CL) of the slide fastener (1), the upper tip surface (65) of the front fastener element (E1) and the upper tip surface (65') of the rear fastener element (E2) form at least a part of an equal side of an isosceles triangle with an acute apex angle.
  14. 　前記各ファスナーエレメント（４，４’）は、前記スライドファスナー（１）の幅方向に平行なエレメント中心線（ＣＸ）を有し、各ファスナーエレメント（４，４’）の前記エレメント上部（６，６’）及び前記エレメント下部（５，５’）が前記エレメント中心線（ＣＸ）上に設けられ、かつ前記エレメント中心線（ＣＸ）に関して対称に形状付けられる、請求項１乃至１３のいずれか一項に記載のスライドファスナー。 The slide fastener according to any one of claims 1 to 13, wherein each fastener element (4, 4') has an element center line (CX) parallel to the width direction of the slide fastener (1), and the element upper part (6, 6') and the element lower part (5, 5') of each fastener element (4, 4') are provided on the element center line (CX) and are shaped symmetrically with respect to the element center line (CX).
  15. 　前記各ファスナーエレメント（４，４’）の前記エレメント上部（６，６’）の前記上面（６１，６１’）は、前記スライドファスナー（１）の幅方向に平行なエレメント中心線（ＣＸ）に沿って細長い矩形状の輪郭を有する、請求項１乃至１４のいずれか一項に記載のスライドファスナー。 The slide fastener according to any one of claims 1 to 14, wherein the upper surface (61, 61') of the element upper portion (6, 6') of each fastener element (4, 4') has an elongated rectangular contour along an element center line (CX) parallel to the width direction of the slide fastener (1).
  16. 　前記エレメント上部（６，６’）は、前記スライドファスナー（１）の幅方向に平行なエレメント中心線（ＣＸ）に沿って上部基端面（６４，６４’）と上部先端面（６５，６５’）の間で細長く形状付けられた略直方体状部分であり、
    　前記エレメント下部（５）は、前記エレメント中心線（ＣＸ）に沿って下部基端面（５４）と下部先端面（５５）の間で細長く形状付けられる、請求項１乃至１５のいずれか一項に記載のスライドファスナー。     The element upper portion (6, 6') is a substantially rectangular parallelepiped portion that is elongated between an upper base end surface (64, 64') and an upper tip end surface (65, 65') along an element center line (CX) that is parallel to the width direction of the slide fastener (1),
    A slide fastener according to any one of claims 1 to 15, wherein the element lower part (5) is shaped elongated along the element center line (CX) between a lower base end surface (54) and a lower tip surface (55).
  17. 　前記エレメント上部（６，６’）は、前記上面（６１，６１’）と前記前側面（６２，６２’）の間で前記スライドファスナー（１）の幅方向に沿って延びる第１中間面（６６，６６’）と、前記上面（６１，６１’）と前記後側面（６３，６３’）の間で前記スライドファスナー（１）の幅方向に沿って延びる第２中間面（６７，６７’）を更に含み、
    　前記左右一対のファスナーストリンガー（２，２’）の各ファスナーストリンガー（２，２’）において、前記ファスナーエレメント（４，４’）の前記エレメント上部（６，６’）の前記上部先端面（６５，６５’）が前記下部先端面（５５）よりも前記ファスナーテープ（３，３’）の前記側縁部（３１，３１’）寄りにオフセットして設けられ、前記下部先端面（５５）と前記上部先端面（６５，６５’）の間に中間面（７，７’）が形成される、請求項１６に記載のスライドファスナー。     The element upper portion (6, 6') further includes a first intermediate surface (66, 66') extending along the width direction of the slide fastener (1) between the upper surface (61, 61') and the front side surface (62, 62'), and a second intermediate surface (67, 67') extending along the width direction of the slide fastener (1) between the upper surface (61, 61') and the rear side surface (63, 63'),
    The slide fastener according to claim 16, wherein in each fastener stringer (2, 2') of the pair of left and right fastener stringers (2, 2'), the upper tip surface (65, 65') of the element upper portion (6, 6') of the fastener element (4, 4') is offset closer to the side edge portion (31, 31') of the fastener tape (3, 3') than the lower tip surface (55), and an intermediate surface (7, 7') is formed between the lower tip surface (55) and the upper tip surface (65, 65').
  18. 　前記上部先端面（６５，６５’）と前記中間面（７，７’）のなす角が、９０°と１００°の間の範囲内の角度に等しい、請求項１７に記載のスライドファスナー。 The slide fastener according to claim 17, wherein the angle between the upper end surface (65, 65') and the intermediate surface (7, 7') is equal to an angle within the range between 90° and 100°.
  19. 次の（ｉ）及び（ｉｉ）の少なくとも一つの条件を満足する：
    （ｉ）前記中間面（７，７’）の幅は、前記エレメント中心線（ＣＸ）沿いに前記上部先端面（６５，６５’）から離れるに応じて漸増し、続いて漸減する；及び
    （ｉｉ）前記中間面（７，７’）は、前記上部先端面（６５，６５’）により円弧が切除された正円形状の輪郭を有する、請求項１７又は１８に記載のスライドファスナー。     At least one of the following conditions (i) and (ii) is satisfied:
    19. A slide fastener according to claim 17 or 18, wherein: (i) the width of the intermediate surface (7, 7') gradually increases and then gradually decreases as it moves away from the upper tip surface (65, 65') along the element center line (CX); and (ii) the intermediate surface (7, 7') has a contour of a perfect circle with an arc cut off by the upper tip surface (65, 65').
  20. 　前記エレメント下部（５）は、前記下部基端面（５４）を有する基部（５１）、前記下部先端面（５５）を有する頭部（５３）、及び前記基部（５１）と前記頭部（５３）の間で最小のエレメント幅を有するように括れた形状の首部（５２）を含む、請求項１６乃至１９のいずれか一項に記載のスライドファスナーであって、
    　前記左右一対のファスナーストリンガー（２，２’）の各ファスナーストリンガー（２，２’）において、前記上部先端面（６５，６５’）は、前記エレメント中心線（ＣＸ）沿いにおいて前記首部（５２）における前記最小のエレメント幅の位置よりも前記ファスナーテープ（３，３’）のテープ外方に位置付けられる；及び／又は
    　前記左右一対のファスナーストリンガー（２，２’）の各ファスナーストリンガー（２，２’）の各ファスナーエレメント（４，４’）において、前記上部先端面（６５，６５’）は、前記エレメント中心線（ＣＸ）に沿う方向において前記下部先端面（５５）又はその最先端位置と比較して前記首部（５２）における前記最小のエレメント幅の位置寄りに位置付けられる、スライドファスナー。     20. A slide fastener according to any one of claims 16 to 19, wherein the element lower part (5) includes a base part (51) having the lower base end surface (54), a head part (53) having the lower tip surface (55), and a neck part (52) having a narrowed shape so as to have a minimum element width between the base part (51) and the head part (53),
    a slide fastener, in which, in each fastener stringer (2, 2') of the pair of left and right fastener stringers (2, 2'), the upper tip surface (65, 65') is positioned outer of the fastener tape (3, 3') than the position of the minimum element width at the neck portion (52) along the element center line (CX); and/or, in each fastener element (4, 4') of each fastener stringer (2, 2') of the pair of left and right fastener stringers (2, 2'), the upper tip surface (65, 65') is positioned closer to the position of the minimum element width at the neck portion (52) as compared with the lower tip surface (55) or its most distal end position in the direction along the element center line (CX).
  21. 　前記各ファスナーエレメント（４，４’）の各エレメント上部（６，６’）は、前記ファスナーテープ（３，３’）のテープ面上に位置する上部基端面（６４，６４’）と、前記上部基端面（６４，６４’）の反対側に位置する上部先端面（６５，６５’）を有し、
    　前記エレメント上部（６）の前記上面（６１，６１’）は、主領域（６１ａ）と、前記主領域（６１ａ）と前記上部基端面（６４）の上端の間において第１所定角度で緩慢に傾斜する第１傾斜領域（６１ｂ）と、前記主領域（６１ａ）と前記上部先端面（６５，６５’）の上端の間において第２所定角度で緩慢に傾斜する第２傾斜領域（６１ｃ）の合計３つの領域から成る、請求項１乃至２０のいずれか一項に記載のスライドファスナー。     Each element upper portion (6, 6') of each fastener element (4, 4') has an upper base end surface (64, 64') located on the tape surface of the fastener tape (3, 3') and an upper tip surface (65, 65') located on the opposite side of the upper base end surface (64, 64'),
    A slide fastener according to any one of claims 1 to 20, wherein the upper surface (61, 61') of the element upper portion (6) is composed of a total of three regions: a main region (61a), a first inclined region (61b) that gradually inclines at a first predetermined angle between the main region (61a) and the upper end of the upper base end surface (64), and a second inclined region (61c) that gradually inclines at a second predetermined angle between the main region (61a) and the upper end of the upper tip surface (65, 65').
PCT/JP2022/041244 2022-11-04 2022-11-04 Slide fastener WO2024095482A1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016046915A1 (en) * 2014-09-24 2016-03-31 Ykk株式会社 Fastener element, fastener stringer, and slide fastener
WO2018122914A1 (en) * 2016-12-26 2018-07-05 Ykk株式会社 Slide fastener
WO2019216256A1 (en) * 2018-05-10 2019-11-14 Ykk株式会社 Fastener stringer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016046915A1 (en) * 2014-09-24 2016-03-31 Ykk株式会社 Fastener element, fastener stringer, and slide fastener
WO2018122914A1 (en) * 2016-12-26 2018-07-05 Ykk株式会社 Slide fastener
WO2019216256A1 (en) * 2018-05-10 2019-11-14 Ykk株式会社 Fastener stringer

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