WO2019043785A1 - ミシン針クランプ装置 - Google Patents
ミシン針クランプ装置 Download PDFInfo
- Publication number
- WO2019043785A1 WO2019043785A1 PCT/JP2017/030923 JP2017030923W WO2019043785A1 WO 2019043785 A1 WO2019043785 A1 WO 2019043785A1 JP 2017030923 W JP2017030923 W JP 2017030923W WO 2019043785 A1 WO2019043785 A1 WO 2019043785A1
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- WIPO (PCT)
- Prior art keywords
- needle
- clamp
- sewing machine
- sewing
- clamp lever
- Prior art date
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B55/00—Needle holders; Needle bars
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B55/00—Needle holders; Needle bars
- D05B55/02—Devices for fastening needles to needle bars
Definitions
- the present invention relates to a sewing machine needle clamp device, and more particularly, a sewing machine needle for securely and easily attaching, fixing or replacing a sewing machine needle such as a lock sewing machine, an overedging machine, a double ring sewing machine or a flat sewing machine.
- the present invention relates to a clamp device.
- the hook and looper as the loop capture device and the feed tooth mechanism are driven by the respective drive mechanisms from the lower shaft which is the drive shaft.
- the sewing needle is screwed with a needle holder attached to a needle bar driven by the upper shaft, which is transmitted from the lower shaft by the lower shaft pulley, the timing belt, and the upper shaft pulley. reference).
- An object of the present invention is to provide a sewing needle clamp device for securely and easily attaching and fixing a sewing needle of a sewing machine to a needle holder by one-touch operation.
- the needle holder is An accommodation recess in which a needle handle of a sewing machine needle is attached and a flat surface is joined to the bottom to be accommodated;
- a swingable clamp lever fixed to a clamp lever shaft which has a clamp arm engaged with the needle handle of a sewing machine needle and is openably and closable with respect to the accommodation recess and loosely fitted in an elongated hole drilled in the needle holder;
- the clamp lever is provided with a needle clamp spring which is spouted outward in a straight line connecting the center point of the needle handle of the sewing machine needle and the center point of the clamp lever shaft, When the clamp lever is swung in the clamp direction with the needle handle of the sewing machine needle engaged with the accommodation recess and abutted in the vertical mounting position, the clamp arm resists the elasticity of the needle clamp spring and the needle handle of the sewing machine needle And
- the needle holder is provided with a lock piece stopper which can move the lock piece in a direction perpendicular to the axial direction of the needle and can guide the lock piece in the direction perpendicular to the axial direction of the needle.
- the clamp lever is provided with a clamp stopper that is locked to the lock piece to prevent the clamp lever from opening when the clamp lever is closed.
- the clamp lever is provided with a lock release button for releasing the locking of the lock piece and the clamp stopper when the clamp lever is opened.
- the staple is An accommodation recess which accommodates the flat surface of the needle handle of the sewing machine needle attached to the bottom and accommodates;
- a swingable clamp lever fixed to a clamp lever shaft which has a clamp arm engaged with the needle handle of a sewing machine needle and is openably and closable with respect to the accommodation recess and loosely fitted in an elongated hole drilled in the needle holder;
- the clamp lever is provided with a needle clamp spring which is spouted outward in a straight line connecting the center point of the needle handle of the sewing machine needle and the center point of the clamp lever shaft, When the clamp lever is swung in the clamp direction with the needle handle of the sewing machine needle engaged with the accommodation recess and abutted in the vertical mounting position, the clamp arm resists the elasticity of the needle clamp spring and the needle handle of the sewing machine needle And a force application locking portion for holding a stable clamp state by the elasticity
- the needle holder for attaching the sewing machine needle is provided with a needle clamp forgetting prevention spring for springing the needle in a direction in which the needle separates from the recess when the clamp lever is opened.
- the needle holder for attaching the sewing machine needle has a cantilever attachment hole having a shape that matches the D-shaped sectional shape including the attachment flat surface of the upper end of the needle handle of the sewing machine needle.
- the mounting flat surface is configured to be attachable to the sewing needle when the mounting orientation of the needle is in contact with the mounting flat surface of the receiving recess.
- the mechanism is simplified, and the sewing needle such as a lock stitch sewing machine, an overturn sewing machine, a double ring sewing machine, a flat stitch sewing machine, etc. Retaining can provide the basic benefits of securing, easily attaching, securing or replacing.
- the needle name surface portion on which the maker name and the count of the sewing machine needle are engraved at the time of sewing needle clamping This eliminates wear due to multiple engagements with the needle and secures clamping of the sewing needle on the needle.
- the clamp lever opens due to an unintended motion in the lateral and longitudinal directions of the needle when the clamp lever is closed.
- the sewing machine needle clamp device of the present invention in addition to the above-mentioned basic merits, when the sewing machine needle penetrates through a cloth with poor needle stabbing, in other words, with a large frictional force, The friction force of the needle can prevent the needle of the sewing machine from falling out of the staple.
- a safety device is provided to prevent the sewing machine needle from dropping when the needle is attached to the needle holder. By dropping the clamp, it is possible to prevent the clamp from being forgotten.
- the sewing machine needle is accommodated only when the mounting flat surface of the needle handle is in the mounting orientation of the sewing machine needle joined to the mounting flat surface of the accommodation recess. It can be attached to the recess and the attachment can be carried out reliably.
- FIG. 1 is a front view of a sewing needle clamping device in which a sewing needle of the present invention is clamped to a needle holder. It is a bottom view of the sewing-machine needle clamp apparatus which clamped the sewing-machine needle by the needle
- 1 is a perspective view of a sewing needle clamping device in which a sewing needle according to the present invention is clamped to a needle holder.
- FIG. 5 is a bottom view of the sewing needle clamping device in a state before clamping the sewing needle according to the present invention to a needle holder. It is a bottom view of the sewing machine needle clamp device in the state immediately after clamping operation of the sewing machine needle by this invention to a needle holder. It is a bottom view of the sewing machine needle clamp device in the state after continuing clamping operation further in the sewing machine needle by this invention needle needle.
- FIG. 1 It is explanatory drawing which shows the moving path
- FIG. 1 is a partially enlarged front view of a sewing needle clamp device that securely clamps a sewing needle of the present invention in a needle holder and prevents needle removal. It is a front view of a sewing needle clamp device which performs sewing needle clamp forgetting prevention of the present invention. It is a perspective view of a sewing needle clamp device which performs sewing needle clamp forgetting prevention of the present invention.
- FIG. 7 is a bottom view of the sewing needle clamp device for reliably orienting the sewing needle when securely clamping the sewing needle of the present invention in the needle holder.
- FIG. 7 is a bottom view of the sewing needle clamp device for reliably orienting the sewing needle when securely clamping the sewing needle of the present invention in the needle holder.
- FIG. 7 is a bottom view of the sewing needle clamp device for reliably orienting the sewing needle when securely clamping the sewing needle of the present invention in the needle holder.
- FIG. 7 is a bottom view of the sewing needle clamp device for reliably orienting the sewing needle when securely clamping the sewing needle of the present invention in the needle holder.
- FIG. 8 is a perspective view of a sewing needle clamp device for reliably performing an operation of orienting the sewing needle when securely clamping the sewing needle of the present invention in a needle holder.
- FIG. 8 is a perspective view of a sewing needle clamp device for reliably performing an operation of orienting the sewing needle when securely clamping the sewing needle of the present invention in a needle holder.
- FIG. 7 is a bottom view of the sewing needle clamp device for reliably orienting the sewing needle when securely clamping the sewing needle of the present invention in the needle holder.
- this two-needle, four-thread edge overlock sewing machine 40 holds the cloth to be sewn between the needle plate 42 and the presser foot pressed by the presser bar, every one eye.
- the feed mechanism is advanced to form stitches on the cloth with the sewing needle 3 and a looper 44 as a loop capture device.
- the looper 44 and the feed mechanism as this loop capture device are driven by the respective drive mechanisms from the lower shaft 46 which is a drive shaft.
- the needle 3 is driven by the needle shaft drive mechanism 56 by the upper shaft 54 which is transmitted from the lower shaft 46 at a rotation ratio of 1: 1 by the lower shaft pulley 48, the timing belt 50 and the upper shaft pulley 52. It is fixed to the staple 5 attached to 58.
- the upper shaft 54 and the needle bar drive mechanism 56 are mounted on the sewing machine arm.
- the needle plate 42 and the looper 44 as a loop capture device and the feed mechanism are mounted on the sewing machine bed.
- the cloth to be sewn is held between the needle plate 42 and the presser foot pressed by the presser bar, and the feed mechanism is set for each one.
- the stitches are formed on the cloth by the sewing needle 3 and the looper 44 as a loop capturing device.
- the number of needle plates 42 for forming the stitches and the number of loopers 44 as loop capture devices and the specific structure and operation thereof are known or known, the details will not be described.
- the feature of the present invention is a sewing needle It exists in the sewing needle clamp device 1 which attaches 3 to the accommodation recessed part 7 of the staple 5.
- the needle holder 5 has a fixing cylindrical portion 11 which fits the needle holder 5 to the needle bar 58 and is attached with a screw 9 and a mounting base 13 integrally extending therefrom.
- the needle holder 5 may be separately attached to the needle bar 58 as in this embodiment, but may be integrally formed on the needle bar 58 and attached.
- the needle holder 5 is provided with the above-mentioned accommodation recess 7 for accommodating the needle stem 15 of the sewing needle 3 in the central attachment portion 13 c of the mounting base 13.
- the accommodation recess 7 of the staple 5 and the mounting base 13 are disposed symmetrically with respect to the central longitudinal cross section of the staple 5 one by one.
- the two sewing needles 3 abut the handle end face of the needle handle 15 at different vertical mounting positions in the needle holder 5, and the mounting flat surface 15a provided on the circumferential surface of the needle handle 15 of the sewing needle 3 , And is attached to the mounting flat surface 7 a of the accommodation recess 7 in the staple holder 5.
- the staple 5 is openable and closable with respect to the accommodation recess 7 and is attached to a clamp lever shaft 17 pivotally attached to a long hole 13b which is bored in attachment portions 13a provided vertically on the attachment base 13 of the staple 5
- the clamp lever 19 fixed is provided.
- the longitudinal direction of the long hole 13b is the same direction as a straight line L2 connecting the central point N of the needle handle 15 of the sewing machine needle 3 accommodated in the accommodation recess 7 of the staple 5 and the central point P of the clamp lever shaft 17 (FIG. 5) (A).
- the clamp lever 19 has a clamp arm 21 that moves in a circumferential direction without contacting the circumferential surface of the needle handle 15 of the sewing needle 3.
- the long hole 13b is formed in a deformed long hole, and the cam follower 70 moves over the cam 71 and moves as a movement path of the clamp lever shaft 17 which becomes the rotation center point P of the clamp lever 19 13d, 13e, 13f (FIG. 5 (e)).
- the center point P of the clamp lever shaft 17 follows the center points P1, P2 and P3 in the deformed elongated hole 13b.
- the three surfaces 13 d, 13 e, 13 f are interposed between arc surfaces 13 g, 13 h, 13 i formed to have the same diameter as the radius r of the clamp lever shaft 17. The details of the configuration of the long holes 13b will be described later.
- the needle holder 5 further includes a plate-like needle clamp spring 23 that spouts outward in a straight line connecting the center point N of the needle handle 15 of the sewing machine needle 3 and the center point P of the clamp lever shaft 17 .
- the clamp arm 21 clamps the clamp lever 19 in a state in which the needle handle 15 of the sewing machine needle 3 is engaged with the accommodation recess 7 and abuts against the vertical mounting position 7b (FIG. 2A).
- the needle clamp spring 23 resists the elasticity of the needle clamp spring 23 A force acting lock for maintaining a stable clamp state by the elastic force of the needle clamp spring 23 passing through the branch point position tp (FIG. 5 (c)) where the elastic force of the needle clamp spring 23 is maximized. It has a section 22.
- the needle handle 15 of the sewing machine needle 3 and the clamp lever shaft 17 of the staple 5 are in a state before clamping the sewing machine needle 3 to the staple 5.
- the clamp arm 21 of the clamp lever 19 is in the positional relationship shown in FIG. 4 (a).
- the left end face of the handle of the needle handle 15 of the sewing machine needle 3 is abutted with the vertical attachment position in the needle holder 5 with the left hand and the circumferential surface of the needle stem 15 of the sewing machine needle 3
- the clamp lever shaft 17 is a needle in the state immediately after the mounting flat surface 15a provided on the mounting flat surface 15a is joined to the mounting flat surface 7a of the accommodation recess 7 in the needle holder 5 and the clamp lever 19 is clamped in the clamp direction a with the right hand.
- the clamp spring 23 elastically presses the outer hole surface of the long hole 13b in a linear direction connecting the center point N of the needle handle 15 of the sewing machine needle 3 and the center point P of the clamp lever shaft 17 (FIG. 5 (b)) .
- the end face of the handle of the needle handle 15 of the sewing machine needle 3 is abutted to the vertical direction attachment position in the staple 5 and is provided on the circumferential surface of the needle handle 15 of the sewing machine needle 3 Of the clamp arm 21 of the clamp lever 19 in a state after further joining the clamp lever 19 in the arrow direction a by joining the mounting flat surface 15a to the mounting flat surface 7a of the accommodation recess 7 in the needle holder 5;
- the tip end 21a that is, the force action locking portion 22 moves in the direction of the needle handle 15 of the sewing needle 3 in the long hole 13b against the spring of the needle clamp spring 23 in order to get over the needle handle 15 of the sewing needle 3. (FIG. 5 (b)).
- the end face of the handle of the needle handle 15 of the sewing machine needle 3 is abutted to the vertical direction attachment position in the staple 5 and is provided on the circumferential surface of the needle handle 15 of the sewing machine needle 3
- the clamp arm of the clamp lever 19 is in a state where the clamp operation is completed in the arrow direction a by joining the mounting flat surface 15a to the mounting flat surface 7a of the housing recess 7 in the needle holder 5.
- the curvature of the needle handle 15 of the sewing needle 3 and the curvature of the clamp arm 21 of the clamp lever 19 are obtained if the tip 21a 21, ie, the force application locking portion 22 passes over the branch point position tp where the elasticity of the needle clamp spring 23 is maximum.
- the clamp lever shaft 17 connects the center point N of the needle handle 15 of the sewing machine needle 3 and the center point P of the clamp lever shaft 17 in a straight line direction.
- the center point N of the needle handle 15 of the center point C and the needle 3 of the engaging surface 21b of the clamp arm 21 coincides (FIG 5 (d)).
- the needle clamp spring 23 exerts a force F to resiliently press the clamp lever shaft 17 in the direction of the center point N of the needle handle 15 and the center point P of the clamp lever shaft 17 and the sewing needle 3 is stably fixed. .
- the stable clamp state is held in this positional relationship. As shown in FIG.
- the sewing machine needle 3, the staple 5 and the clamp lever 19 are straight lines connecting the center point C of the engagement surface 21b of the clamp arm 21 and the center point P of the clamp lever shaft 17.
- L1 is configured to be dimensioned to coincide with a straight line L2 connecting the center point N of the needle handle 15 of the sewing needle 3 and the center point P of the clamp lever shaft 17.
- the needle handle 15 of the sewing machine needle 3, the clamp lever shaft 17 of the needle holder 5 and the clamp arm 21 of the clamp lever 19 are the center point C of the engagement surface 21b of the clamp arm 21 and the clamp lever shaft
- the needle name 15 on which the manufacturer name and the count of the sewing machine needle 3 are engraved at the time of sewing machine needle clamping and the convex portion of the force acting locking portion 22 of the clamp arm 21 There is a possibility that mutual surface wear may occur due to the difference in the engagement and the material of the two during the engagement, and thus the sewing needle 3 can not be reliably clamped to the staple 5.
- the sewing needle clamp device 1 has the needle holder 5 openable and closable with respect to the accommodation recess 7 as described above as the premise thereof in order to solve the above-mentioned problems.
- the clamp lever 19 has a clamp arm 21 that moves in a circumferential direction without contacting the circumferential surface of the needle handle 15 of the sewing needle 3.
- the clamp arm 21 clamps the clamp lever 19 in the clamp direction a (FIG. 4 (b) with the needle handle 15 of the sewing machine needle 3 engaged with the accommodation recess 7 and abutting against the vertical mounting position 7b (FIG. 2 (a)).
- the needle clamp spring 23 resists the elastic force of the needle clamp spring 23 and moves around without touching the needle handle 15 of the sewing machine needle 3).
- the force clamp portion 22 passes the branch point position tp (FIG. 5C) at which the elastic force of the needle clamp spring 23 is maximum and holds the stable clamp state by the elastic force of the needle clamp spring 23.
- the clamp arm 21 is provided with a cam follower 70 engaged with the cam 71, and the elongated hole 13b is formed in a deformed elongated hole, and the cam follower 70 serves as a moving path of the clamp lever shaft 17 which becomes the rotation center P of the clamp lever 19.
- the center point P of the clamp lever shaft 17 follows the center points P1, P2 and P3 in the deformed elongated hole 13b.
- the three surfaces 13 d, 13 e, 13 f are interposed between arc surfaces 13 g, 13 h, 13 i formed to have the same diameter as the radius r of the clamp lever shaft 17.
- the deformed elongated holes 13b are formed by the inner peripheral surfaces of the three surfaces 13d, 13e, 13f and the arc surfaces 13g, 13h, 13i.
- the center point P of the clamp lever shaft 17 passes through the center points P1 and P2 in the deformed elongated hole 13b by the engagement of the cam follower 70 and the cam 71 according to the closing of the clamp lever 19 and the repulsion of the needle clamp spring 23.
- the center point P3 is reached, while the clamp lever shaft 17 has three surfaces as its movement path It is designed to follow 13d, 13e and 13f.
- the center point P of the clamp lever shaft 17 moves the center points P3, P2 and P1 in the opposite direction in the deformed elongated hole 13b in accordance with the opening of the clamp lever 19.
- the bifurcated point position tp at which the elastic force of the needle clamp spring 23 which holds the stable clamp state by the elastic force of the needle clamp spring 23 passing through the above-mentioned force acting locking portion 22 is maximum is the central point P3 in the long hole 13b.
- the contact point of the cam follower 70 and the cam 71 when the center point P of the clamp lever shaft 17 matches.
- the center point P3 is a center point P on a straight line L2 connecting the center point N of the needle handle 15 and the center point P of the clamp lever shaft 19. To the center point N, with some clearance L3 (FIG. 5 (c)).
- the cam follower 70 serves as the moving path of the clamp lever shaft 17 which becomes the rotation center P3 of the clamp lever 19 in the state where the sewing machine needle 3 is completely clamped to the staple 5 without contact with the pump arm 21
- the surfaces 13d, 13e, 13f (FIG. 5 (a), FIG. 5 (b), FIG. 5 (c), FIG. 5 (d)) are shown. Engage tightly.
- the mechanism is simplified, and the sewing needle such as a lock stitch sewing machine, an overedging sewing machine, a double ring sewing machine, a flat sewing machine, etc.
- the sewing needle such as a lock stitch sewing machine, an overedging sewing machine, a double ring sewing machine, a flat sewing machine, etc.
- the force of the needle pattern surface and the clamp arm on which the manufacturer's name and count of the sewing needle are engraved It is possible to eliminate the wear due to the multiple engagement with the action locking surface, and to clamp the sewing needle securely to the staple.
- the lock piece 72 is movable in the needle holder 5 in the direction orthogonal to the axial center direction of the needle 3. And a lock piece stopper 73 for guiding the lock piece 72 in the direction orthogonal to the axial direction of the sewing needle 3.
- the clamp lever 19 is provided with a clamp stopper 74 which is engaged with the lock piece 72 to prevent the clamp lever 19 from opening when the clamp lever 19 is closed, and the clamp lever 19 is clamped when the clamp lever 19 is opened.
- a lock release button 75 which is slidably accommodated in the lever 19 and releases the lock of the lock piece 72 and the clamp stopper 74 is provided.
- the lock piece 72 is pressed toward the clamp by a coil spring 72a.
- the clamp lever 19 caused by the unintended movement of the sewing machine needle 3 in the lateral direction and / or front and rear direction when the clamp lever 19 is closed. Can act as a safety device to prevent the sewing needle 3 from colliding with other parts and breaking or scattering.
- the needle holder 5 for attaching the sewing needle 3 is, for example, PVC
- the sewing needle 3 penetrates a cloth with poor needle penetration, in other words, with a large frictional force, used in a sports bag coated with PU on cloth or leather, and then the sewing needle 3 is removed from the cloth.
- it is formed in the outer shape of the needle handle 15 of the sewing machine needle, in particular, the inner shape 77 aligned with the handle taper 76.
- the sewing needle 3 penetrates through a cloth with poor needle stabbing, and next, when the sewing needle 3 is removed from the cloth, a force acts in the direction of coming out of the staple 5 due to the frictional force with the cloth.
- the inner shape 77 of the tapered groove similar to the handle taper 76 of the sewing needle 3 is provided on the outlet side of the needle attachment groove of the needle holder 5, the needle thread hole is formed even if the sewing needle 3 moves in the direction
- the position is a tapered shape with a clearance that does not affect the timing position at which the needle thread is wound at the lower looper point.
- the sewing machine needle clamp device 1 of the present invention in addition to the above-mentioned basic merits, when the needle penetrates through a cloth with poor needle stabbing, in other words, with a large frictional force, The frictional force can prevent the needle from falling out of the staple.
- the needle 5 for attaching the sewing needle 3 receives the sewing needle 3 when the clamp lever 19 is opened.
- An L-shaped needle clamp forgetful protection spring 78 is provided which urges the sewing needle 3 in a direction away from the recess 7.
- the needle taper of the sewing needle 3 and the inner shape 77 of the tapered groove similar to the handle taper 76 of the sewing needle 3 are provided on the outlet side of the needle attachment groove of the needle holder 5
- the sewing needle 3 does not fall when attached to the rod 5. Therefore, there is a possibility of forgetting the clamp operation.
- the clamping operation is not performed, since the sewing needle 3 is ejected from the back side of the sewing needle 3 in a direction in which the sewing needle 3 is removed from the tapered groove, the sewing needle 3 falls.
- a safety device is provided to prevent the sewing machine needle 3 from falling when the sewing machine needle 3 is attached to the staple 5, while the clamp lever 19 is opened. By causing the sewing needle 3 to drop from the accommodation recess 7, it is possible to prevent the clamp from being forgotten.
- the needle holder 5 for attaching the sewing machine needle 3 is flat at the upper end of the needle handle 15 of the sewing needle 3.
- the sewing machine needle 3 can be attached when it is in the direction of.
- the handle taper 76 of the sewing needle 3 can not be attached to the accommodation recess 7 at this point because it does not enter the part of the inner shape 77 of the stay 5 (Fig. 9 (e) to Fig. 9 (g)).
- the attachment hole 80 of the needle holder 5 has a D-shaped cross-sectional shape 79 in the portion where the upper end of the needle handle 15 enters, so when the needle handle 15 is not in the normal direction
- the force action locking portion (clamp distal end portion) 22 can not get over the needle handle 15, and the clamping operation can not be performed.
- the needle handle 15 of the sewing needle 3 is inserted into the cantilever mounting hole 80 when the orientation of the flat surface 15a of the needle handle 15 of the sewing needle 3 is the position shown in FIGS. Even if the mounting flat surface 7a of the accommodation recess 7 of the hook 5 does not fit into the mounting flat surface 7a and is lifted up, the tip 21a of the clamp arm passes over the needle handle 15 when the clearance L3 increases. Therefore, it is necessary to reduce the clearance L3.
- the sewing needle clamp device 1 of the present invention in addition to the above basic merits, the sewing needle is accommodated only when the mounting flat surface of the needle handle is in the mounting orientation of the needle joined to the mounting flat surface of the accommodation recess. It can be attached to the recess and the attachment can be carried out reliably.
- the sewing machine needle clamp device of the present invention the operation that the thin sewing machine must be firmly screwed with a screw into the small space of the needle holder is eliminated. Simplifying, it is possible to securely and easily attach, fix or replace sewing needles such as a lock stitch sewing machine, an overturn sewing machine, a double ring stitch sewing machine, a flat stitch sewing machine or the like with a small number of one-touch operations in operation. While the clamp lever is closed, the clamp lever is opened due to an unintended movement in the lateral and back-to-back direction of the needle, causing a malfunction such that the needle clamp is released and the sewing needle collides with other parts.
- It can function as a safety device that prevents breakage and scattering, and the needle penetrates a cloth with a poor needle stick, in other words, a large frictional force, and then the cloth
- the frictional force with the cloth can prevent the sewing machine needle from falling out of the needle holder, and when the sewing machine needle is attached to the needle holder, it has a safety device to prevent the sewing needle from falling.
- the sewing machine needle clamp device is suitably applied to various sewing machines such as lock sewing machines, overturn sewing machines, double ring sewing machines, flat stitch sewing machines and the like because the sewing machine needles are securely and easily attached and fixed to the staples. It is possible.
- Sewing machine (Belt sewing machine) 42: Needle plate 44: Looper 46 as a loop capturing device: Lower shaft 48: Lower shaft pulley 50: Timing belt 52: Upper shaft pulley 54: Upper shaft 56 ⁇ needle bar drive mechanism 58 ... needle bar 70 ... cam follower 71 ... cam 72 ... locking piece 73 ... locking piece stopper 74 ... clamp stoppers 75 ... lock release button 76 ... Outside shape (handle taper) 77: Inner shape 78: Needle clamp forget-preventing spring 79: D-shaped cross-sectional shape 80: Cantilever mounting hole a: Clamping direction L1: Center of engaging surface of clamp arm A linear distance L2 connecting the point and the center point of the clamp lever shaft ...
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Abstract
Description
ミシン針の針柄を取付け平坦面を底部に接合させて収容する収容凹部と、
ミシン針の針柄に係合するクランプ腕を有し、収容凹部に対して開閉自在で針留に穿孔される長孔に遊嵌されるクランプレバー軸に固定される揺動自在のクランプレバーと、
クランプレバーをミシン針の針柄の中心点及びクランプレバー軸の中心点を結ぶ直線の外方に弾発する針クランプバネとを備え、
クランプ腕は、ミシン針の針柄を収容凹部に係合して垂直方向取付け位置に突合せた状態でクランプレバーをクランプ方向に揺動すると針クランプバネの弾力に抗してミシン針の針柄上を周動し、針クランプバネの弾力が最大となる分岐点位置を通過して針クランプバネの弾力によって安定クランプ状態を保持する力作用係止部を有し、
針留にはカムを設け、クランプ腕にはカムに係合するカムフォロアーを設け、
長穴はクランプレバーの回転中心となるクランプレバー軸の移動経路としてカムフォロアーがカムを乗り越えて移動する3面を有する。
針留にはロック片を針の軸芯方向と直交する方向に可動自在に設けるとともに、ロック片を針の軸芯方向と直交する方向に案内するロック片ストッパーを設け、
クランプレバーには、クランプレバーの閉成時に、ロック片に係止してクランプレバーの開成を防止するクランプストッパーを設け、
クランプレバーには、クランプレバーの開成時に、ロック片及びクランプストッパーの係止を解除するロック解除ボタンを設けている。
ミシン針の針柄の取付け平坦面を底部に接合させて収容する収容凹部と、
ミシン針の針柄に係合するクランプ腕を有し、収容凹部に対して開閉自在で針留に穿孔される長孔に遊嵌されるクランプレバー軸に固定される揺動自在のクランプレバーと、
クランプレバーをミシン針の針柄の中心点及びクランプレバー軸の中心点を結ぶ直線の外方に弾発する針クランプバネとを備え、
クランプ腕は、ミシン針の針柄を収容凹部に係合して垂直方向取付け位置に突合せた状態でクランプレバーをクランプ方向に揺動すると針クランプバネの弾力に抗してミシン針の針柄上を周動し、針クランプバネの弾力が最大となる分岐点位置を通過して針クランプバネの弾力によって安定クランプ状態を保持する力作用係止部を有し、
ミシン針を取付ける針留には、ミシン針が布に貫通し、次いで布からミシン針が抜けるとき、ミシン針が針留から抜け落ちるのを防止するため針の針柄又は外側形状に整合する内側形状に形成される。
3・・・ミシン針
5・・・針留
7・・・収容凹部
7a・・・取付け平坦面
9・・・ネジ
11・・・固定用円筒部
13・・・取付用基台
13a・・・取付部
13b・・・長孔
13c・・・垂直方向取付部
13d、13e、13f・・・面
15・・・針柄
15a・・・取付け平坦面
17・・・クランプレバー軸
19・・・クランプレバー
21・・・クランプ腕
21a・・・クランプ腕の先端
21b・・・係合面
22・・・力作用係止部
23・・・針クランプバネ
27・・・ネジ
40・・・ミシン(縁かがりミシン)
42・・・針板
44・・・ループ捕捉装置としてのルーパ
46・・・下軸
48・・・下軸プーリ
50・・・タイミングベルト
52・・・上軸プーリ
54・・・上軸
56・・・針棒駆動機構
58・・・針棒
70・・・カムフォロアー
71・・・カム
72・・・ロック片
73・・・ロック片ストッパー
74・・・クランプストッパー
75・・・ロック解除ボタン
76・・・外側形状(柄テーパ)
77・・・内側形状
78・・・針クランプ忘れ防止バネ
79・・・D字状断面形状
80・・・片持ち取付け孔
a・・・クランプ方向
L1・・・クランプ腕の係合面の中心点とクランプレバー軸の中心点を結ぶ直線距離
L2・・・針柄の中心点及びクランプレバー軸の中心点を結ぶ直線距離
L3・・・P3とPとのクリアランス
C・・・クランプ腕の係合面の中心点
N・・・針柄の中心点
P・・・クランプレバー軸の中心点
P1、P2、P3・・・中心点
tp・・・分岐点位置
Claims (5)
- ミシン針を針留の収容凹部に取付けるミシン針クランプ装置において、前記針留は、
ミシン針の針柄を取付け平坦面を底部に接合させて収容する収容凹部と、
前記ミシン針の針柄に係合するクランプ腕を有し、前記収容凹部に対して開閉自在で前記針留に穿孔される長孔に遊嵌されるクランプレバー軸に固定される揺動自在のクランプレバーと、
前記クランプレバーを前記ミシン針の針柄の中心点及び前記クランプレバー軸の中心点を結ぶ直線の外方に弾発する針クランプバネとを備え、
前記クランプ腕は、前記ミシン針の針柄を前記収容凹部に係合して垂直方向取付け位置に突合せた状態で前記クランプレバーをクランプ方向に揺動すると前記針クランプバネの弾力に抗して前記ミシン針の針柄上を周動し、前記針クランプバネの弾力が最大となる分岐点位置を通過して前記針クランプバネの弾力によって安定クランプ状態を保持する力作用係止部を有し、
前記針留にはカムを設け、前記クランプ腕には前記カムに係合するカムフォロアーを設け、
前記長穴は前記クランプレバーの回転中心となる前記クランプレバー軸の移動経路として前記カムフォロアーが前記カムを乗り越えて移動する3面を有することを特徴とするミシン針クランプ装置。 - 前記針留にはロック片を前記針の軸芯方向と直交する方向に可動自在に設けるとともに、前記ロック片を前記ミシン針の軸芯方向と直交する方向に案内するロック片ストッパーを設け、
前記クランプレバーには、前記クランプレバーの閉成時に、前記ロック片に係止して前記クランプレバーの開成を防止するクランプストッパーを設け、
前記クランプレバーには、前記クランプレバーの開成時に、前記ロック片及び前記クランプストッパーの係止を解除するロック解除ボタンを設けることを特徴とする請求項1記載のミシン針クランプ装置。 - ミシン針を針留の収容凹部に取付けるミシン針クランプ装置において、前記針留は、
ミシン針の針柄を取付け平坦面を底部に接合させて収容する収容凹部と、
前記ミシン針の針柄に係合するクランプ腕を有し、前記収容凹部に対して開閉自在で前記針留に穿孔される長孔に遊嵌されるクランプレバー軸に固定される揺動自在のクランプレバーと、
前記クランプレバーを前記ミシン針の針柄の中心点及び前記クランプレバー軸の中心点を結ぶ直線の外方に弾発する針クランプバネとを備え、
前記クランプ腕は、前記ミシン針の針柄を前記収容凹部に係合して垂直方向取付け位置に突合せた状態で前記クランプレバーをクランプ方向に揺動すると前記針クランプバネの弾力に抗して前記ミシン針の針柄上を周動し、前記針クランプバネの弾力が最大となる分岐点位置を通過して前記針クランプバネの弾力によって安定クランプ状態を保持する力作用係止部を有し、
前記ミシン針を取付ける前記針留には、前記針が布に貫通し、次いで前記布から前記針が抜けるとき、前記針が前記針留から抜け落ちるのを防止するため前記針の前記針柄又は外側形状に整合する内側形状に形成されることを特徴とするミシン針クランプ装置。 - 前記ミシン針を取付ける前記針留には、前記クランプレバーの開成時に、前記針が前記収容凹部から離反する方向に前記針を弾発する針クランプ忘れ防止バネを設けることを特徴とする請求項3項記載のミシン針クランプ装置。
- 前記ミシン針を取付ける前記針留には、前記ミシン針の前記針柄の上端部の取付け平坦面を含むD字状断面形状に整合する形状の片持ち取付け孔を前記針柄の前記取付け平坦面が前記収容凹部の前記取付け平坦面に接合する前記針の取付けの向きのとき前記ミシン針を取付け可能となるように形成することを特徴とする請求項1又は請求項3記載のミシン針クランプ装置。
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JP2017565865A JP7089270B2 (ja) | 2017-08-29 | 2017-08-29 | ミシン針クランプ装置 |
US16/094,388 US10676848B1 (en) | 2017-08-29 | 2017-08-29 | Sewing machine needle clamping device |
CH01031/19A CH714898B1 (de) | 2017-08-29 | 2017-08-29 | Festklemmvorrichtung für eine Nähmaschinennadel. |
CN201780014549.8A CN109923255B (zh) | 2017-08-29 | 2017-08-29 | 缝纫针夹持装置 |
DE112017001950.8T DE112017001950T5 (de) | 2017-08-29 | 2017-08-29 | Festklemmvorrichtung für eine Nähmaschinennadel |
PCT/JP2017/030923 WO2019043785A1 (ja) | 2017-08-29 | 2017-08-29 | ミシン針クランプ装置 |
KR1020187021991A KR102245972B1 (ko) | 2017-08-29 | 2017-08-29 | 재봉틀 바늘 클램프 장치 |
AU2017430010A AU2017430010B2 (en) | 2017-08-29 | 2017-08-29 | Sewing machine needle clamp device |
TW107100646A TWI745524B (zh) | 2017-08-29 | 2018-01-08 | 縫紉針夾持裝置 |
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JP2018015171A (ja) * | 2016-07-27 | 2018-02-01 | ブラザー工業株式会社 | 針取付具及びミシン |
CN112760839A (zh) * | 2019-07-04 | 2021-05-07 | 莆田城厢晟铭网络有限公司 | 一种纺织机及操作方法 |
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KR102245972B1 (ko) | 2021-04-28 |
US10676848B1 (en) | 2020-06-09 |
TWI745524B (zh) | 2021-11-11 |
CN109923255B (zh) | 2021-05-25 |
KR20200042369A (ko) | 2020-04-23 |
TW201912872A (zh) | 2019-04-01 |
DE112017001950T5 (de) | 2019-04-18 |
CN109923255A (zh) | 2019-06-21 |
JPWO2019043785A1 (ja) | 2020-08-06 |
AU2017430010A1 (en) | 2019-08-29 |
CH714898B1 (de) | 2021-09-15 |
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US20200190716A1 (en) | 2020-06-18 |
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