WO2004037047A1 - Structure of chair backrest - Google Patents

Structure of chair backrest Download PDF

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Publication number
WO2004037047A1
WO2004037047A1 PCT/JP2003/012919 JP0312919W WO2004037047A1 WO 2004037047 A1 WO2004037047 A1 WO 2004037047A1 JP 0312919 W JP0312919 W JP 0312919W WO 2004037047 A1 WO2004037047 A1 WO 2004037047A1
Authority
WO
WIPO (PCT)
Prior art keywords
back plate
back frame
frame
plate
bending
Prior art date
Application number
PCT/JP2003/012919
Other languages
French (fr)
Japanese (ja)
Inventor
Takashi Nakamura
Original Assignee
Kokuyo Furniture Co.,Ltd.
Takano Co., Ltd.
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
Priority claimed from JP2002299716A external-priority patent/JP2004129966A/en
Priority claimed from JP2002299697A external-priority patent/JP4185754B2/en
Application filed by Kokuyo Furniture Co.,Ltd., Takano Co., Ltd. filed Critical Kokuyo Furniture Co.,Ltd.
Priority to AU2003272952A priority Critical patent/AU2003272952A1/en
Publication of WO2004037047A1 publication Critical patent/WO2004037047A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/46—Support for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs
    • A47C7/462—Support for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs adjustable by mechanical means

Definitions

  • the present invention relates to a chair backrest structure. More specifically, the present invention relates to an improvement in a back plate supporting structure that allows the shape of the backrest to be deformable.
  • this backrest structure has a back support rod 101, which is elastically deformable in the front-rear direction and is supported by a shaft 103. 0 4 is provided, and the lower end of the back plate 102 is displaced to the back support rod 101 by inserting the pin 105 attached to the lower end of the back plate 102 into the long hole 104. It is connected as much as possible.
  • a spring 106 for urging the back plate 102 forward is provided between the back support rod 101 and the back plate 102.
  • the back plate 102 cannot be bent significantly. For this reason, the back support rod 101 could not be tilted backwards slightly while the back plate 102 was largely bent. Further, unless the seated person leans on the backrest, the backboard 102 cannot be bent and maintained in that state. In other words, the chair could not be used with the bending angle of the back plate 102 set to the desired angle.
  • this backrest support structure is designed so that The back plate 206 is made of a flexible material such as resin, or a slit is formed in the middle of the back plate 206 because it is rigidly supported at both ends of the back plate 206. Even if the back plate 206 is easily deformable, it can be deformed in the front-back direction (the depth direction of the chair), but the center of the backrest is centered on the axis passing in the longitudinal direction (mainly the vertical direction) It is impossible to impart torsion or deformation to the backboard 206, and it is difficult to deform the backboard 206 according to the posture of the seated person with the torsion.
  • An object of the present invention is to provide a chair backrest structure that can use a chair in a state where a bending angle of a backboard is set to a desired angle. Further, an object of the present invention is to provide a backrest structure of a chair capable of satisfactorily deforming a backboard according to a posture of a seated person.
  • the backrest structure of the present invention includes a lower back plate fixed to the first back frame, an upper back plate tiltable in the front-rear direction, a bending angle adjustment mechanism, and a lower end of the first back frame.
  • a second back frame the upper end of which can be tilted in the front-rear direction around the connection point, and a connection connecting the upper end of the second back frame to the upper part of the back plate while absorbing these relative displacements Means, a connecting point force between the first back frame and the second back frame, and a displacement means provided at a remote position to change a distance between the first back frame and the second back frame. It is provided with.
  • the bending angle of the backboard can be adjusted by operating the displacement means, and the bending angle of the backboard can be adjusted to a desired angle by a simple adjustment operation.
  • the mechanism since the relative displacement generated between the upper end of the second back frame and the second back frame connecting portion of the back plate can be absorbed by the connecting means, the mechanism can be established.
  • the backrest structure of a chair according to the present invention includes a deformable backplate and at least one back support member at least a portion connected to the backplate is formed of a flexible resin. is there. Therefore, when the occupant leans on the back plate, the back support member flexes according to the magnitude, direction, and position of the applied load, and the back plate is easily deformed. The back plate is deformed, so that the leaning comfort can be improved.
  • the backboard By deforming and tilting the upper part of the backboard in the front-back direction with respect to the lower part of the backboard, the backboard can be bent as a whole, and at least the upper part of the backboard can be deformed, and the second back frame can be used. It is made of flexible resin It is.
  • the second back frame tilts the upper part of the backboard, so that the backboard can be bent in the front-rear direction around the backboard bending area.
  • the back plate is easily deformed with a radius depending on the magnitude, direction, and position of the load applied to the second back frame, and the back plate follows the posture of the seated person and is deformed with twisting or locally. Easy to deform. Therefore, the leaning comfort can be improved.
  • the second back frame bends easily according to the magnitude, direction, and position of the applied load, so that the deformable back plate is easily deformed.
  • the bending angle adjusting mechanism by operating the bending angle adjusting mechanism, the bending angle in the front-rear direction around the bending region of the backboard can be adjusted to a desired angle. If the bending angle of the backboard is adjusted to the desired angle and the bending angle is fixed, the bending angle of the backboard is maintained by the bending angle adjustment mechanism even if the occupant leans strongly against the backboard.
  • the bending angle of the back plate can be adjusted by operating the displacement means, and the bending angle of the back plate can be adjusted to a desired angle by a simple adjustment operation.
  • the mechanism can be established.
  • the displacement means includes a first back frame and a second back frame. An adjusting screw provided on one of the back frames, a female screw member provided on one of the other sides and having a screw hole into which the adjusting screw is inserted, and an angle of at least one of the adjusting screw and the female screw member in a vertical direction. It is provided with angle changing means for changing.
  • the screwing amount of the female screw member into the screw hole changes. Therefore, the distance between the first back frame and the second back frame at a position apart from the connection point between the first back frame and the second back frame changes, and the tilt angle of the second back frame changes. And the bending angle of the backboard changes. That is, the bending angle of the back plate can be adjusted by rotating the adjusting screw.
  • the opposing angle between the adjusting screw of the displacement means and the screw hole also changes, but this change is absorbed by the angle change means, so the displacement No excessive force is generated in the means, light! / Can be operated by force.
  • the connecting means includes a shaft portion having a circular contour formed at least at an upper end of the second back frame; A shaft receiver having an inlet formed therein, and a member provided above the shaft receiver and defining a space for allowing movement of the tip of the shaft portion. Things.
  • the second back frame is moved. Absorbs relative displacement in the axial direction of one meter.
  • the shaft portion makes a razor movement with respect to the entrance, thereby absorbing a vertical angle change and a horizontal angle change between the second back frame and the back plate. Further, the rotation of the shaft with respect to the shaft receiver absorbs a change in the horizontal angle between the second back frame and the back plate. As a result, the degree of freedom of movement of the connecting portion between the second back frame and the back plate can be improved. In addition, the number of components is reduced, and the number of manufacturing processes is accordingly reduced, so that manufacturing costs can be reduced.
  • the shape of the slit is at least a shape protruding in one direction, for example, a U-shape
  • a part of the back plate can be protruded to form the support portion.
  • the back plate bending area is intentionally formed to enable bending of the back plate at an arbitrary position.However, in some cases, a region where the back plate is bent and deformed is also included, and the back plate is fixed. It is formed between the portion and the connecting portion.
  • the backrest structure of the chair according to the present invention is further characterized in that a support member for assisting the backrest is rotatably attached to the upper end of the backboard, and the support member and the first back frame are connected by a link, thereby bending the backboard.
  • the support member is rotated in conjunction with. Therefore, even if the occupant leans against the backboard and takes a posture in which the head is raised, the head and the like can be supported by the support member. For this reason, the usability of the chair can be improved.
  • the resin is glass-filled nylon.
  • FIG. 1 is a sectional view showing an embodiment of a backrest structure of a chair according to the present invention.
  • Fig. 2 is a cross-sectional view showing the backrest structure of the chair, with the backboard bent significantly.
  • Fig. 3 is a rear view showing the back plate of the backrest structure of the chair.
  • Fig. 4 shows the connecting means of the backrest structure of the chair, and is a cross-sectional view seen from above.
  • Fig. 5 shows the connecting means and is a cross-sectional view from the side.
  • Fig. 6 is a cross-sectional view showing a first example of a displacement means of the backrest structure of the chair.
  • Fig. 7 shows the same displacement means, and is a cross-sectional view of the back plate with the back plate bent significantly.
  • FIG. 16 is a sectional view showing a third example of the displacement means of the backrest structure of the chair.
  • Fig. 17 shows a third example of the displacement means, and is a cross-sectional view of the state where the back plate is greatly bent.
  • Fig. 18 is a sectional view showing a fourth example of the displacement means of the backrest structure of the chair.
  • Fig. 19 shows a fourth example of the displacement means, and is a cross-sectional view of the back plate with the back plate largely bent.
  • FIG. 20 is a side view showing a first modification of the backrest structure of the chair of the present invention.
  • Fig. 20 is a side view showing a first modification of the backrest structure of the chair of the present invention.
  • FIG. 27 shows the use state of the chair to which the backrest structure of Fig. 26 is applied, and shows how the chair is used by children.
  • Fig. 28 shows the use of the chair to which the backrest structure of Fig. 26 is applied, showing how an adult uses it.
  • Fig. 29 shows a fifth embodiment of the backrest structure of the chair to which the present invention is applied, and is a cross-sectional view showing a state where the headrest is moved rearward.
  • Fig. 30 shows a fifth embodiment of the backrest structure of the chair, in which the headrest is moved forward.
  • FIG. Fig. 31 shows the use state of the chair to which the backrest structure of Fig. 29 is applied, in which the headrest is moved backward.
  • Fig. 32 shows the use state of the chair to which the backrest structure is applied, in which the headrest is moved forward and the entire backrest is reclined.
  • Fig. 33 is a rear view showing the slits on the back plate with steps.
  • Fig. 34 is a rear view showing the appearance of two slits on the back plate.
  • Fig. 35 is a rear view showing a single slit in the back plate.
  • Fig. 36 is a cross-sectional view showing another embodiment of the connecting means constituting the backrest structure of the chair to which the present invention is applied.
  • Fig. 37 is a conceptual diagram for explaining the shape of the insertion port and the movement of the projection.
  • FIG. 38 is a sectional view showing still another embodiment of the connecting means constituting the backrest structure of the chair to which the present invention is applied.
  • Fig. 39 shows a sixth embodiment of the backrest structure of the chair according to the present invention, which is provided with a support member for supporting from the scapula portion of the seated person to the head as a support member. It is a figure of the state where it is moving back.
  • FIG. 40 shows a sixth embodiment of the backrest structure, in which the support body is moved forward and the entire backrest is reclined.
  • Fig. 41 is a perspective view showing how the upper part of the backboard is twisted and deformed.
  • Fig. 42 is a perspective view showing how the center of the back plate is deformed so as to protrude backward.
  • Fig. 41 is a perspective view showing how the upper part of the backboard is twisted and deformed.
  • Fig. 42 is a perspective view showing how the center of the back plate is deformed so as to protrude backward
  • FIG. 43 is a perspective view showing how the back plate is deformed so that one side protrudes backward.
  • FIG. 44 is a schematic configuration diagram of a first back frame, a back plate, and a second back frame showing a seventh embodiment of the backrest structure of the chair of the present invention.
  • Fig. 45 shows a seventh embodiment of the backrest structure of the chair of the present invention, and is a schematic configuration diagram of the first back frame, the back plate, and the second back frame with the back plate reclining. is there.
  • Fig. 46 is a side view showing the backrest structure of a conventional chair.
  • Fig. 47 is a side view showing the backrest structure of another conventional chair.
  • One of the upper back plate 2a and the lower back plate 2b is fixed to the first back frame 1, and the other is supported by the second back frame 5, and the back plate bending area 2e
  • the back plate 2 By tilting the upper back 2a or the lower back 2b in the front-back direction with respect to the lower back 2b or the upper back 2a, the back plate 2 can be bent as a whole. I have.
  • the back plate lower portion 2b is fixed to the first back frame 1, and the back plate upper portion 2a is connected to the second back frame 5 so as to be able to be linked in the front-rear direction.
  • the back plate bending region 2e is deformed so that the back plate 2 can be bent around the bending region 2e.
  • the mounting relationship of the back plate 2 to the back support member 61 is not limited to the above embodiment, and the upper portion 2a of the back plate is fixed to the first back frame 1 and the lower portion 2b of the back plate 2
  • the support frame 2 may be supported by the back frame 5.
  • the back support member 61 for supporting the backrest in the backrest structure of the present embodiment is composed of two side plates 1 d swingably mounted on the seat member 8 and a back plate mounting wall 1 f and a reinforcing plate 1.
  • One first back frame 1 connected and integrated with g, etc., and two rigid rod-like rods such as steel pipes that are attached to the side plate 1 d of the first back frame 1 so as to be tiltable.
  • It is composed of one second back frame 5 in which objects are connected by connecting plates 11 and 12 and integrated.
  • This second back frame 5 , connecting means 6 for connecting the upper end of the second back frame 5 to the upper part 2a of the back plate, and a position away from the connecting pin 4 And a displacement means 7 for connecting the first back frame 1 and the second back frame 5 to change the distance between the first back frame 1 and the second back frame 5 in the first embodiment. 3 are configured.
  • the first back frame 1 is attached to the seat receiving member 8 so as to be tiltable.
  • the lower back 2b of the back plate 2 is fixed to the first back frame 1.
  • the first back frame 1 is swingably attached to the seat receiving member 8 by a connecting pin 8 1 so that the back plate 2 is always erected by a reaction force unit 8 3 mounted on the seat receiving member 8.
  • the seat receiving member 8 has a long hole 85 at the distal end side, and a shaft 84 is passed through the long hole 85 to support the seat 9 so as to be able to move back and forth.
  • the rear end of the seat 9 is hooked on a shaft 82 penetrating the back support member 61 and is supported by the back support member 61. Therefore, the seat 9 moves back and forth with the tilt of the back support member 61, and sinks or lifts the rear side.
  • the back plate 2 is made of, for example, a flexible material.
  • the back plate 2 is formed of, for example, a resin such as polypropylene or nylon.
  • the resin used as the material of the back plate 2 is not limited to these, and the back plate 2 may be formed of a material other than the resin.
  • the back plate 2 is made to be bendable by being made of a flexible material such as resin, but the back plate upper portion 2a and the back plate lower portion 2b of the back plate 2 are formed as separate members.
  • the back plate 2 may be bendable by connecting the back plate upper portion 2a and the back plate lower portion 2b with a hinge or the like. In this case, the hinge is the back plate bending area 2 e.
  • the hinge is, for example, integrally formed with the upper back plate 2a and the lower back plate 2b of the back plate 2, and is more flexible than the resin used as the material of the upper back plate 2a and the lower back plate 2b. It is possible to apply a resin hinge formed by using a certain resin, and it is formed integrally with the back plate upper part 2a and the back plate lower part 2b of the back plate 2, and the back plate upper part 2a and the back plate lower part 2b It is possible to apply a hinge that has flexibility by making it thinner.
  • the slit 10 is formed to be easily deformed, and the upper part 2a of the backboard above the bending area 2e or the lower part 2b of the lower backboard is tilted in the front-back direction about the bending area 2e.
  • the bending region 2 e is a region between a portion where the back plate 2 is fixed to the first back frame 1 and a portion where the back plate 2 is connected to the second back frame 5. More specifically, the bending region 2 e is a region near the hinge that functions similarly to the slit 10 ⁇ slit 10, and is generally represented by Figs. 3, 33, and 3. 4. In the range indicated by the imaginary line in Fig. 35, it is the area where positive elastic deformation is presumed.
  • the bent region 2e is intentionally formed to allow the back plate 2 to bend at an arbitrary position, but may include a region which is bent as a result in some cases.
  • the shape of the slit 10 when the shape of the slit 10 is U-shaped and the tongue piece 2c is formed, that is, when the tongue piece 2c is projected downward, When the upper part of the plate 2 is inclined backward and bent, the tongue piece 2c can be projected forward, and the protruded tongue piece 2c can support the waist of the occupant.
  • the shape of the slit 10 may be linear, or the bent area 2e may be continuous. It is composed of typical resin hinges. That is, by making the shape of the slit 10 linear, it is possible to prevent a part of the back plate 2 from projecting even if the back plate 2 is bent.
  • the second back frame 5 is fixed to the first back frame 1 with the bending area 2 e as a boundary.
  • the back plate portion 2a above the bending region 2e is rotatably and slidably connected to the back plate 2 at the back plate portion opposite to the side of the back plate. It supports 2a.
  • a circular pipe is employed as the second back frame 5, and two second back frames 5 are provided on the left and right sides, for example, so as to support both ends in the width direction (horizontal direction) of the back plate 2. .
  • the second back frame 5 is connected by two connecting plates 11 and 12.
  • the number of the second back frames 5 is not limited to two, but may be one or three or more.
  • the center of the back plate 2 may be supported, or a T-shape may be used to support both ends of the back plate 2.
  • the left and right pipe second back frames 5 are connected by two connecting plates 11 and 12.
  • one connecting plate requires at least rigidity as the second back frame 5. May be connected.
  • the second back frame 5 is formed of a circular pipe material, but may be a solid rod material or, in some cases, a square pipe or a square material.
  • the connecting means 6 includes a shaft 13 having a circular contour formed at least at the upper end of the second back frame 5, and a shaft rotatable relative to the shaft 13.
  • a connecting part 14 slidable in the direction is provided, and a shaft support means 15 for rotatably attaching the connecting part 14 to the back plate 2 around a horizontal axis.
  • the second back frame 5 is a pipe having a circular cross section
  • the upper end of the second back frame 5 forms the shaft portion 13.
  • the connecting portion 14 is a cap (hereinafter, referred to as a cap 14) having a circular inner peripheral surface that is fitted into the shaft portion 13 with a slight gap.
  • the connecting portion 14 is not limited to the cap, and may be, for example, a ring or the like. It may be.
  • the outer peripheral shape of the shaft portion 13 and the inner peripheral surface shape of the connecting portion 14 do not have to be circular in a strict sense, and rotation can be allowed in a movable range required between them. Any shape is sufficient.
  • the shaft support means 15 is rotatably connected to a bracket 14a fixed to the cap 14 and a bracket 2d fixed to the back plate 2 through these brackets 2d and 14a. This is a hinge joint composed of a shaft 16 to be mounted.
  • the cap 14 is fitted into the shaft 13 from above.
  • the cap 14 is rotatable with respect to the shaft 13 and slidable in the axial direction.
  • the cap 14 has such a length that it does not fall off the shaft portion 13 within the range of movement of the second back frame 5. That is, even if the cap 14 slides with respect to the shaft portion 13 due to the tilting of the second back frame 5 and the bending of the back plate 2, the cap 14 does not come off from the shaft portion 13.
  • the displacement means 7 includes an adjusting screw 17 provided on one of the first back frame 1 and the second back frame 5, and a female screw member 21 provided on the other.
  • the female screw member 21 has a rod shape, has a screw hole 18 into which an adjusting screw 17 penetrating in the radial direction is screwed, and is disposed so as to be orthogonal to the adjusting screw 17.
  • the female screw member 21 and the adjusting screw 17 are attached to the first back frame 1 and the second back frame 5 so as to be adjustable in angle.
  • an adjusting screw 17 is attached to the connection plate 12 that connects the second back frame 5, and a female screw member 21 is provided on the first back frame 1.
  • the adjusting screw 17 is opened to the connection plate 12 having a slightly larger diameter or a longer hole (longer in the height direction of the backrest) than the adjusting screw 17 via the thrust bearing 20. It is attached to the connecting plate 12 so as to be rotatable, tiltable and adjustable in position, and not fall off by passing through a hole (not shown). Further, the female screw member 21 is disposed between the side plates I d and 1 d protruding from the back plate mounting wall 1 f of the first back frame 1, and both ends thereof are connected to the side plates 1 d of the first back frame 1. , Id and are screwed and supported on coaxial screws 22 and 22.
  • the screws 22 pass through through holes 1 e formed in the side plate 1 d of the first back frame 1 and are screwed into screw holes formed at both ends of the female screw member 21. Therefore, the female screw member 21 is
  • the first back frame 1 is rotatably supported on the screw 22 by angle changing means 19 rotatably supported by the screw 22 and the side plate 1d.
  • the screw hole 18 penetrates the center of the female screw member rod 21 in the radial direction.
  • a stop disk 23 is attached at the tip of the adjusting screw 17 screwed into the screw hole 18, so that the adjusting screw 17 does not come out of the screw hole 18.
  • An operating lip 43 is fixed to an end of the adjusting screw 17, and is provided so as to rotate the adjusting screw 17 using the grip 43.
  • the bending angle of the back plate 2 can be adjusted to a desired angle as described below.
  • the backrest structure of the present invention when the occupant leans against the backboard 2 and tilts the backboard 2 with respect to the seat receiving member 8, that is, a force for rotating the adjustment screw 17 even during reclining. Since the bending does not occur, the bending angle of the back plate 2 does not change during use.
  • the occupant can adjust the bending angle of the backboard 2 to a desired angle by operating the adjustment screw 17, and can use the chair with the backboard 2 bent at the desired angle.
  • the usability of the chair can be improved.
  • it is easy to rotate the adjusting screw 17 and the adjusting work is also simple. This also improves the usability of the chair.
  • the chair with the bending angle of the backboard 2 increased for example, when the first back frame 1 is tilted and the entire backrest is reclined, the back muscles can be further extended, A better stretching effect can be obtained.
  • the length of the gas spring 24 is fixed or released by opening and closing a release valve that prevents the flow of the working gas by operating the lever 25.
  • This lever 25 is located in the space below the side edge of the backboard 2 so that the occupant does not bend forward, and can be grasped simply by lowering his hand with his back on the backboard 2. It can be operated as it is. Therefore, it is easy to perform the lever operation, and it is also easy to perform the operation of pushing the back plate 2 with the back while operating the lever 25.
  • the gas spring 24 is linked from the valve operation part to the left and right direction of the chair. By extending 26, the lever 25 can be directly attached to the link 26, and a reasonable arrangement can be adopted. In other words, the gas spring 24, the link 26, the wrapper 25, and the like can be assembled to the chair in a previously assembled state, and the chair can be easily assembled.
  • the relative displacement generated between the upper end of the second back frame 5 and the link connecting portion of the back plate 2 can be absorbed by the connecting means 6, so that the second back frame 5 is A mechanism for bending the back plate 2 by tilting can be established. Also, since no excessive force acts on the connection between the second back frame 5 and the back plate 2, the back plate 2 can be moved smoothly, and the back plate 2 can be bent with a light force. And the feel is better. Furthermore, since an excessive force is prevented from acting on the connecting portion between the second back frame 5 and the back plate 2, it is possible to prevent damage and wear of members and components due to stress concentration, and to prolong the product life. it can. In addition, the degree of freedom in the selection of materials for each member and part, and the degree of freedom in the combination of materials between sliding and contacting parts and parts are improved. Can be
  • the back plate 2 of the present embodiment made of a flexible material has a structure in which the cap 14 rotates with respect to the shaft portion 13 so that, as viewed from above, as shown in FIG. It becomes easy to curve the back plate 2 so that the center of the back plate 2 projects rearward. That is, when the occupant leans on the back plate 2, the back plate 2 is easily curved in accordance with the shape of the back. Therefore, the sitting comfort can be further improved.
  • cover 28 To attach the cushioning material 27 covered with the force par 28 to the back plate 2, first, pass the cover 28 to the tongue piece of the back plate 2 through the slit 10 of the back plate 2. After covering over 2c from below, it is sufficient to cover the upper edge of the back plate 2 while turning over the upper folded portion 28a. At this time, cover 28 covers pocket 28b on tongue 2c of backboard 2 so that it can be hooked, and then extends upward while pulling back folded part 28a of backboard 2. It can be attached by putting it on the upper end. Also, since the folded part 28a of the force par 28 is placed on the upper edge of the back plate 2 and the bocket 28b is placed on the tongue piece 2c, the cover 28 is left and right with respect to the back plate 2. There is no deviation in the direction.
  • the cover 28 for storing the cushioning material 27 when the cover 28 for storing the cushioning material 27 is attached to the back plate 2, the cover 28 is fixed to the back plate 2 with a pin or a hook-and-loop fastener. (The so-called magic tape).
  • a folded part 28 a was provided on the upper edge of the cover 28 to cover the upper edge of the back plate 2, but even in this case, the lower part of the cover 28 was pinched using pins or hook-and-loop fasteners. It was stopped on board 2. Therefore, in the conventional method, it was troublesome to attach the force par 28 containing the cushioning material 27 to the back plate 2, and the workability was poor.
  • the color of the back plate 2 and the color of the cover 28 can be different so that the folded part 28
  • the a and the boket part 28b become components on the design, making it a design that has never existed before, and can be differentiated from other types of chairs.
  • the pocket 28b can be used as a pocket for storing small items such as a mobile phone.
  • the back plate 2 is formed of a material or a structure that can be deformed in any direction, and the second back frame 5 is formed as a flexible structure. May be.
  • the back plate 2 is made of a resin such as polypropylene or nylon similarly to the above-described embodiment. Further, at least a portion of the second back frame 5 connected to the back plate 2 is formed of a flexible resin.
  • the resin forming the second back frame 5 is preferably a resin filled with a reinforcing material such as glass fiber or carbon fiber, but the back plate 2 is satisfactorily deformed according to the posture of the occupant.
  • a reinforcing material such as glass fiber or carbon fiber
  • the back plate 2 is satisfactorily deformed according to the posture of the occupant.
  • the back plate 2 is satisfactorily deformed according to the posture of the occupant.
  • the back plate 2 is preferably a resin filled with a reinforcing material such as glass fiber or carbon fiber, but the back plate 2 is satisfactorily deformed according to the posture of the occupant.
  • a reinforcing material such as glass fiber or carbon fiber
  • the fork branches above the connection point of the second back frame 5 by the connection plate 11.
  • the arm with the stronger weight of the occupant has a larger radius, and the arm with no weight acts on the back plate 2 due to the deformation of the back plate 2. Is pulled forward. That is, as shown in Fig. 41, the back plate 2 is deformed so that the upper end of the back plate 2 is twisted about the center line 59 of the back plate 2.
  • the arm portion of the second back frame 5 bends, it is difficult to hinder the deformation of the back plate 2, and the back plate 2 can be largely deformed into a shape that follows the posture of the seated person.
  • the two arms of the second back frame 5 bend inward.
  • the center of the back plate 2 is greatly curved so as to protrude backward. That is, since the arm portion of the second back frame 5 bends, it becomes difficult to hinder the deformation of the back plate 2, and the back plate 2 can be largely deformed into a shape that follows the posture of the seated person. Furthermore, as shown in Fig.
  • the first back frame 1 in addition to the second back frame 5 may be formed of a flexible resin such as nylon reinforced with glass fiber or the like.
  • the back plate 2 is more easily deformed than when only the second back frame 5 is formed of a flexible resin, and in particular, as shown in FIG. This is effective when the plate 2 is torsionally deformed.
  • at least a portion connecting the back plate 2 of the second back frame 5 is formed of a flexible resin so that the deformation of the back plate 2 is not hindered. Therefore, the degree of freedom of deformation of the back plate 2 can be increased with a simple structure, and the number of parts does not increase.
  • the mounting structure of the cushion material 27 can be applied to the back plate 2 provided with the slit 10 and forming the tongue piece portion 2c irrespective of the structure of the back support member 61. .
  • the pocket portion 28b may be opened downward.
  • the slit 10 is formed in an inverted U shape so that the tongue piece 2c is formed upward.
  • the connecting means 6 includes the shaft portion 13, the cap 14, and the shaft supporting means 15, but the configuration is not necessarily limited to this.
  • the link bracket is attached to the upper end of the second back frame 5.
  • a slot 31 is provided along the axial direction of the second back frame 5
  • a back plate side bracket 32 is fixed to the back plate 2, and a long A pin 33 passing through the hole 31 may be attached.
  • the connecting means 6 includes a shaft portion 51 having a circular contour formed at least at an upper end of the second back frame 5 and a back surface of the back plate 2.
  • a member 55 that defines a space 54 that allows the movement of the tip of 51 may be provided.
  • a box (hereinafter referred to as a box 55) is formed on the back of the back plate 2 as the member 55, and the bottom wall of the box 55 is a bearing 53, a box.
  • the interior space of 55 is defined as space 54.
  • the structure for forming the bearing 53 and the space 54 is not limited to the box 55.
  • Fig. 37 shows the concept of the insertion port 52.
  • the opening of the insertion opening 52 is formed with a conical surface extending toward the inside of the shaft portion bearing 53 and to both surfaces on the front side. For this reason, it is easy for the shaft 51 inserted into the inlet 52 to make a razor movement with respect to the shaft bearing 53, and the relative position between the back plate 2 and the second back frame 5 is increased. The degree of freedom of movement is improved as compared with the combination of the cap 14 and the shaft 13 of FIG.
  • the shaft supporting means that is, the hinge 15 required for the connecting means 6 shown in FIG. 5 can be omitted.
  • the structure is simpler than that shown in Fig. 5, and the number of parts can be reduced, and the number of manufacturing processes can be reduced. Can be lowered.
  • the box part 55 of the connecting means 6 is connected to the back plate 2 by the pin 56, and the box part 55 is attached to the back plate 2 so as to be rotatable vertically. You may do it.
  • the displacement means 7 may have a cam structure.
  • Fig. 16 and Fig. 17 show an example where the displacement means 7 has a cam structure.
  • a cam plate 38 is rotatably attached to a flange 12b provided so as to protrude from the back plate 2 side of the connection plate 12 by a pin 46.
  • a long hole 38a is formed in the cam plate 38, and the rotation angle of the cam plate 38 is limited to a certain range by passing the fixing pin 39 through the long hole 38a. I have.
  • the cam plate 38 can be rotated to change the distance between the second back frame 5 and the back plate 2.
  • the back plate 2 does not separate from the cam plate 38 because the back plate 2 tries to return to the original shape by its own elastic force and tries to reduce the bending angle. That is, when the pushing force by the cam plate 38 is released, the back plate 2 reduces the bending angle due to its own natural force.
  • the cam plate 38 itself may be directly driven, or the pin 46 may be rotated.
  • the rotation angle of the cam plate 38 can be fixed to an arbitrary angle, so that the bending angle of the back plate 2 can be adjusted steplessly.
  • the tilt angle of the second back frame 5 can be changed stepwise, and the bending angle of the back plate 2 can be changed in multiple steps. Can be adjusted.
  • the bending angle of the back plate 2 can be adjusted by changing the bending angle of the two links 40 and 41 by operating means (not shown) and fixing the bending angle.
  • the bending angle of the back plate 2 can be adjusted steplessly by fixing the two links 40 and 41 at an arbitrary bending angle.
  • the bending angle of the back plate 2 is increased by tilting the upper end of the second back frame 5 rearward, so that, for example, during reclining, the back of the occupant can be stretched more. Although it was possible to obtain the better stretching effect, it is not always necessary to use this configuration.
  • the lower back 2b of the back plate 2 may support the buttocks of the seated person.
  • the first back frame 1 is extended upward, and the back plate upper portion 2 a of the back plate 2 is fixed to the first back frame 1.
  • the lower portion 2b of the back plate 2 can be tilted in the front-rear direction.
  • the upper end of the second back frame 5 is rotatably attached to the first back frame 1 so as to be suspended.
  • the lower end of the second back frame 5 is connected to the lower back plate 2 of the back plate 2.
  • the lower back plate 2b of the back plate 2 becomes a buttocks support for supporting the buttocks of the occupant, and a feeling of support when sitting can be obtained.
  • a bent region 2e is formed at the boundary between the upper portion 2a of the back plate 2 and the lower portion 2b of the back plate 2 by a resin hinge or the like.
  • the second back frame 5 is omitted, and a displacement means 7 is provided between the first back frame 1 and the lower portion 2b of the back plate 2.
  • the displacement of the displacement means 7 may be directly transmitted to the lower portion 2b of the back plate.
  • the lower part 2b of the back plate, that is, the buttocks support can be tilted back and forth by changing the bending angle of the back plate 2 by operating the displacement means 7.
  • the height of the back plate 2 may be adjustable.
  • the first back frame 1 is further divided into a lower frame 1a and an upper frame 1b, and a vertically-opening cylindrical portion 1c provided at a tip of the lower frame 1a is formed into an upper frame. 1b is inserted, and the height of the back plate 2 is adjusted by sliding the upper frame 1b with respect to the cylindrical portion 1c.
  • the connection between the upper frame 1b and the cylindrical portion 1c is performed, for example, by connecting the plurality of holes 47 provided in the upper frame 1b with the holes 48 of the cylindrical portion 1c in a state where the connecting pins 49 are aligned. This is performed by penetrating through.
  • the back plate 2 By locking the upper frame 1b to the cylindrical portion 1c, the back plate 2 can be fixed at the adjusted height. By adjusting the height of the back plate 2, the height of the bent portion of the back plate 2 can be changed. As shown in Fig. 27 and Fig. 28, adjusting the height of the back plate 2 according to the physique of the occupant improves the sitting comfort. Fig. 27 shows a child sitting, and Fig. 28 shows an adult sitting.
  • a support member for assisting the backrest may be provided in addition to the backrest. That is, the support member 44 is attached to the upper end of the back plate 2 so as to be rotatable in the front-rear direction, and the support member 44 and the first back frame 1 are connected by the link 45 so as to interlock with the bending of the back plate 2. Alternatively, the support member 44 may be tilted. As the support member 44, for example, a headrest 44 can be cited. The usage conditions are shown in Fig. 31 and Fig. 32. The lower end of the headrest 44 is rotatably attached to the upper end of the back plate 2, and the upper end of the head rest 44 is connected to the first back frame 1 by a link 45.
  • the link 45 is rotatably connected to the headrest 44 and the first back frame 1. As shown in Fig. 29 and Fig. 31, when the back plate 2 is not bent so much, the headrest 44 moves backward and does not obstruct the occupant. When the backboard 2 is bent from this state, the headrest 44 moves forward as shown in FIGS. 30 and 32, and can support the head of the seated person.
  • the support member 44 is not limited to a headrest that supports the head of a seated person.
  • a headrest that supports the head of a seated person.
  • the support members 44 of Fig. 39 and Fig. 40 are, for example, if the user leans on the backboard 2 while operating the personal computer, the occupant raises the upper back slightly to see the monitor. It looks like this. Even in such a case, the upper body of the seated person can be lifted by the support body 57.
  • the link member 45 is provided to operate the servo member 44 in conjunction with the bending of the back plate 2.
  • the movement of the support member 44 is controlled by the bending of the back plate 2. It does not need to be linked to.
  • the support member 44 may be fixed to the back plate 2 or, in some cases, an operation means for operating the support member 44 independently of the bending of the back plate 2 is provided. May be tilted.
  • an operation lever or the like is provided at a position where the occupant can easily operate, and displacement means 7 such as an adjusting screw 17, a cam plate 38, and links 40 and 41 use the operation lever or the like. It is also possible to operate it.
  • an electric motor for rotating the adjusting screw 17, the cam plate 38, the link 40, 41, etc. is adopted, and the electric motor is started and stopped by a switch operation.
  • the displacement means 7 may be operated electrically.
  • a bag that expands and contracts with a fluid is provided as the displacement means 7, and the bag is connected to the second back frame 5 and the back plate 2, and a fluid such as air is injected or sucked into the bag.
  • the bag may be expanded or contracted to tilt the second back frame 5, that is, to change the bending angle of the back plate 2.
  • the seat structure of the chair includes a seat plate having a front portion fixed to the seat frame and a rear portion capable of bending vertically, and a bending angle adjusting mechanism for changing a bending angle of the seat plate and fixing the bending angle.
  • a bending angle adjusting mechanism for changing a bending angle of the seat plate and fixing the bending angle.
  • the flexible back plate 2 and the back support structure that supports the back support member 61 with at least a portion connected to the back plate 2 with flexibility are shown in Fig. l to Fig. 12 have already been described as being practicable in the embodiment shown in FIGS. 13 to 45.
  • the embodiment can be also performed in the embodiments shown in FIGS. That is, the backrest structure in which the backboard 2 is deformed in accordance with the posture when the seated person leans on the backboard 2 can be implemented alone, or the backboard 2 can be bent back and forth in the bending area 2 e. It can be carried out simultaneously with the leaning structure.
  • one set of resin back support members 61 in which the amount of a reinforcing agent such as glass fiber is adjusted so that only the portion connected to the upper portion of the back plate 2 exhibits flexibility is prepared.
  • the lower part of the back plate 2 is fixed and supported at the relatively rigid part of the member 61, while the upper part of the back plate 2 is rotatable and slidable on the tip of the flexible back support member 61.
  • the left and right back support members 61 may be separately tilted to deform the backrest according to the posture of the seated person leaning on the back.
  • first back frame 1 tiltably attached to the seat receiving member 8 with the displacement means 7 omitted, and the second back frame 5 tiltably attached to the first back frame 1 A back support member 61 having a back plate bending region 2 e, a back plate upper portion 2 a positioned above the back plate bending region 2 e, and a lower position positioned below the back plate bending region 2 e And a back plate 2 having a back plate lower portion 2b fixed to the first back frame 1 and an upper end of the second back frame 5 connected to the back plate upper portion 2a while absorbing these relative displacements.
  • the connecting means 6 may be provided.
  • the backboard bending area 2e is deformed, and the backboard upper section 2a is tilted in the front-back direction with respect to the backboard lower section 2b. 2 can be bent, and at least the upper portion 2a of the backboard 2 can be deformed.
  • the back plate 2 can be further deformed so as to be twisted in a horizontal plane. This example is shown in Fig. 44 and Fig. 45. When the occupant leans on the backboard 2, the second back frame 5 bends the upper part 2 a of the backboard 2.
  • the second back frame 5 bends following the posture of the seated person, so that the upper portion 2a of the back plate 2 can easily be deformed following the posture of the seated person. That is, also in this case, the deformation of the back plate 2 is easy, the deformation is easy to follow the movement of the occupant, and the sitting comfort is improved, and the degree of freedom of the deformation of the back plate 2 is simple.
  • This is similar to the above-described backrest structure in that the number of parts can be increased and the number of parts is not increased.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)

Abstract

A structure of a chair backrest that can be used with a back board set at a preferred angle of bend. The structure comprises a back support member (61) having a first back frame (1) tiltably attached to a seat-receiving member (8) and a second back frame (5) tiltably attached to the first back frame (1), and comprises a back board (2) having a back board-bending region (2e), a back board upper portion (2a) positioned more upward than the back board-bending region (2e), and a back board lower portion (2b) positioned more downward than the back board-bending region (2e). The back board lower portion (2b) is fixed to the first back frame (1), and the back board upper portion (2a) is supported by the second back frame (5). The back board (2) is bendable forward by deforming the back board-bending region (2e). A bending angle-adjusting mechanism (3) is provided in the structure, and the mechanism makes it possible that an angle of bend of the back board is varied and fixed by adjusting the tilt angle of the second back frame (5) with respect to the first back frame (1).

Description

明 細 書  Specification
椅子の背凭れ構造 技術分野  Chair backrest structure
本発明は、 椅子の背凭れ構造に関する。 更に詳述すると、 本発明は背凭れの形 状を変形可能とする背板の支持構造の改良に関する。  The present invention relates to a chair backrest structure. More specifically, the present invention relates to an improvement in a back plate supporting structure that allows the shape of the backrest to be deformable.
背景技術  Background art
従来、 着座者の体重の掛け方に応じて背板を屈曲させる椅子の背凭れ構造が知 られている （E P 0 5 9 1 9 3 3 A 1 ) 。 この背凭れ構造は、 Fig. 4 6に示すよ うに、 前後方向に弾性変形可能な背板 1 0 2がシャフト 1 0 3によつて軸支され ている背支桿 1 0 1に長孔 1 0 4が設けられ、 背板 1 0 2の下端に取り付けられ たピン 1 0 5を長孔 1 0 4に揷入することで、 背板 1 0 2の下端を背支桿 1 0 1 に変位可能に連結されたものとなっている。 また、 背支桿 1 0 1と背板 1 0 2の 間には背板 1 0 2を前方へ付勢するスプリング 1 0 6が設けられている。  2. Description of the Related Art Conventionally, a backrest structure of a chair in which a backboard is bent in accordance with the weight of a seated person has been known (EP 0 519 933 A1). As shown in Fig. 46, this backrest structure has a back support rod 101, which is elastically deformable in the front-rear direction and is supported by a shaft 103. 0 4 is provided, and the lower end of the back plate 102 is displaced to the back support rod 101 by inserting the pin 105 attached to the lower end of the back plate 102 into the long hole 104. It is connected as much as possible. A spring 106 for urging the back plate 102 forward is provided between the back support rod 101 and the back plate 102.
背支桿 1 0 1は座板 1 0 7に傾動可能に取り付けられており、 図示しないスプ リング機構によって常に起立する方向に付勢されている。 スプリング機構の付勢 力に抗して背支桿 1 0 1を傾動させるので、 着座者が背板 1 0 2に軽く寄り掛か る場合には背支桿 1 0 1は小さく後方へ傾く。 一方、 着座者が背板 1 0 2に強く 寄り掛かった場合には、 背支桿 1 0 1は大きく後方へ傾く。  The back support rod 101 is attached to the seat plate 107 so as to be tiltable, and is constantly urged by a spring mechanism (not shown) in a direction in which it is erected. Since the back support rod 101 is tilted against the urging force of the spring mechanism, when the occupant leans lightly on the back plate 102, the back support rod 101 tilts slightly backward. On the other hand, when the occupant leans strongly against the back plate 102, the back support rod 101 is greatly inclined backward.
着座者が背板 1 0 2に寄り掛かると、 背板 1 0 2の上部と下部とでは上部の方 がより強く押されるので、 Fig. 4 6に二点鎖線で示すように、 背板 1 0 2はシャ フト 1 0 3を中心に上部側を後方に倒すように傾動する。 このとき、 背板 1 0 2 の下端はピン 1 0 5によって背支捍 1 0 1に連結されているので、 前方には移動 することができず、 長孔 1 0 4内を上方に移動する。 このため、 シャフト 1 0 3 より下において背板 1 0 2の下部の中央寄り部分が前方に突出し、 背板 1 0 2全 体が屈曲したような形状に変形する。  When the occupant leans on the backboard 102, the upper part of the backboard 102 is pushed more strongly at the top and bottom, and as shown by the two-dot chain line in Fig. 46, the backboard 1 02 tilts around the shaft 103 so that the upper side is tilted backward. At this time, since the lower end of the back plate 102 is connected to the dorsal support 101 by the pin 105, it cannot move forward, but moves upward in the elongated hole 104. . Therefore, the lower portion of the back plate 102 near the center protrudes forward below the shaft 103, and the entire back plate 102 is deformed into a bent shape.
着座者が背板 1 0 2に軽く寄り掛かると背板 1 0 2は小さく屈曲し、 強く寄り 掛かると背板 1 0 2は大きく屈曲する。 即ち、 着座者が背板 1 0 2に寄り掛かる 強さに応じて背板 1 0 2の屈曲角度が変化する。 しかしながら、 上述の背凭れ構造では、 着座者が寄り掛かる強さに応じて背板 1 0 2の屈曲角度が変化するため、 着座者が強く寄り掛かって背支桿 1 0 1を大 きく後方へ傾けさせると、 背板 1 0 2が大きく屈曲してしまう。 このため、 背板 1 0 2を小さく屈曲させた状態で背支桿 1 0 1を後方へ大きく傾けさせることが できなかった。 When the occupant leans lightly on the back plate 102, the back plate 102 bends slightly, and when leaning strongly, the back plate 102 bends greatly. That is, the bending angle of the back plate 102 changes according to the strength with which the seated person leans on the back plate 102. However, in the above-described backrest structure, since the bending angle of the back plate 102 changes according to the strength with which the occupant leans, the occupant leans strongly and pushes the back support rod 101 back largely. If it is tilted, the back plate 102 will bend significantly. For this reason, the back support rod 101 could not be largely tilted backward with the back plate 102 bent slightly.
また、 着座者が軽く寄り掛かって背支桿 1 0 1を後方へ小さく傾けるときには、 背板 1 0 2を大きく屈曲させることができない。 このため、 背板 1 0 2を大きく 屈曲させた状態で背支桿 1 0 1を小さく後方へ傾けさせることができなかった。 更に、 着座者が背凭れに寄り掛からない限り、 背板 1 0 2を屈曲させ、 その状 態を維持することはできない。 つまり、 背板 1 0 2の屈曲角度を好みの角度に設 定した状態で椅子を使用することができなかった。  Also, when the seated person leans lightly and tilts the back support rod 101 backward slightly, the back plate 102 cannot be bent significantly. For this reason, the back support rod 101 could not be tilted backwards slightly while the back plate 102 was largely bent. Further, unless the seated person leans on the backrest, the backboard 102 cannot be bent and maintained in that state. In other words, the chair could not be used with the bending angle of the back plate 102 set to the desired angle.
また、 背凭れの形状を変形可能な従来の背凭れ構造として、 例えば、 特開 2 0 0 0— 2 3 7 7 8号に開示されている椅子がある。 この椅子は、 Fig. 4 7に示す ように、 左右に配置される 1組の背支桿を変形しにくい剛体の上部フレーム 2 0 1と下部フレーム 2 0 2とでそれぞれ構成している。 そして、 上部フレーム 2 0 1と下部フレーム 2 0 2は枢支部材 2 0 3によって連結されており、 角度可変と なっている。 また、 上部フレーム 2 0 1の上端近傍には変形しにくい剛体のブラ ケット 2 0 4が角度可変に取り付けられており、 ブラケット 2 0 4と下部フレー ム 2 0 2との間には、 樹脂等の弾性を有する材料で形成された屈撓可能な補強材 としてのベルト 2 0 5が取り付けられている。 そして、 背板 2 0 6は、 左右のベ ルト 2 0 5を挟むようにしてブラケット 2 0 4と下部フレーム 2 0 2に取り付け られている。  Further, as a conventional backrest structure capable of changing the shape of the backrest, for example, there is a chair disclosed in Japanese Patent Application Laid-Open No. 2000-237778. In this chair, as shown in Fig. 47, a pair of back support rods arranged on the left and right are composed of a rigid upper frame 201 and a lower frame 202, which are hard to deform. The upper frame 201 and the lower frame 202 are connected by a pivotal member 203 so that the angle is variable. In addition, a rigid bracket 204 that is hard to deform is mounted near the upper end of the upper frame 201 so as to be variable in angle, and a resin or the like is provided between the bracket 204 and the lower frame 202. A belt 205 is attached as a bendable reinforcing member formed of a material having the above elasticity. The back plate 206 is attached to the bracket 204 and the lower frame 202 so as to sandwich the left and right belts 205.
背板 2 0 6は下部シェル 2 0 6 bと上部シェル 2 0 6 cとからなり、 折れ曲が り部 2 0 6 aを境に屈曲可能に連結されている。 着座者が背凭れに寄り掛かると、 下部シェル 2 0 6 bが後方に移動するので、 ベルト 2 0 5の張力と背板 2 0 6の 弾性によって上部シヱル 2 0 6 cが前方に回動する。 このため、 例えば、 背凭れ に寄り掛かりながらパソコンのモニタ画面を見る場合等にも着座者の背中を背凭 れでサポートすることができる。  The back plate 206 includes a lower shell 206 b and an upper shell 206 c, and is connected to bend at a bent portion 206 a. When the occupant leans against the backrest, the lower shell 206b moves rearward, and the tension of the belt 205 and the elasticity of the backplate 206 causes the upper seal 206c to rotate forward. . For this reason, the back of the seated occupant can be supported by the backrest, for example, when looking at the monitor screen of the personal computer while leaning on the backrest.
しかしながら、 この背凭れ支持構造は、 背板 2 0 6を左右方向 （椅子の幅方 向） の両端で剛的に支持することになるため、 背板 2 0 6を樹脂等の可撓性の材 料で形成したり、 あるいは背板 2 0 6の途中にスリットを入れる等して背板 2 0 6を変形しやすいものにしても、 前後方向 （椅子の奥行き方向） には変形可能で あるが、 背凭れの中心を長手方向 （主に上下方向） に通る軸を中心とした捩れや 変形を背板 2 0 6に与えることはできず、 着座者の体の捩れを伴う姿勢に応じて 背板 2 0 6を変形させることが困難である。 例えば、 着座者が体を捻って背凭れ の右側に寄り掛かった場合に、 着座者の背中に沿って背板 2 0 6を右側後方に捻 るように変形させながらリクライニング姿勢をとること等は困難であった。 更には、 この背凭れ支持構造は、 背凭れを後方へ傾けたときに腰部あたりを前 方へ押し出すように背板を変形させることはできない。 However, this backrest support structure is designed so that The back plate 206 is made of a flexible material such as resin, or a slit is formed in the middle of the back plate 206 because it is rigidly supported at both ends of the back plate 206. Even if the back plate 206 is easily deformable, it can be deformed in the front-back direction (the depth direction of the chair), but the center of the backrest is centered on the axis passing in the longitudinal direction (mainly the vertical direction) It is impossible to impart torsion or deformation to the backboard 206, and it is difficult to deform the backboard 206 according to the posture of the seated person with the torsion. For example, if the occupant twists his body and leans on the right side of the backrest, taking a reclining posture while deforming the back plate 206 along the occupant's back so as to twist it to the right rear side, etc. It was difficult. Furthermore, the backrest support structure cannot deform the backboard so that the waist portion is pushed forward when the backrest is tilted backward.
本発明の目的は、 背板の屈曲角度を好みの角度に設定した状態で椅子を使用で きる椅子の背凭れ構造を提供することにある。 また、 本発明の目的は、 着座者の 姿勢に応じて背板を良好に変形させることができる椅子の背凭れ構造を提供する ことにめる。  An object of the present invention is to provide a chair backrest structure that can use a chair in a state where a bending angle of a backboard is set to a desired angle. Further, an object of the present invention is to provide a backrest structure of a chair capable of satisfactorily deforming a backboard according to a posture of a seated person.
発明の開示  Disclosure of the invention
かかる目的を達成するため、 本発明の椅子の背凭れ構造は、 座受け部材に傾動 可能に取り付けられた少なくとも 1つの第 1の背フレームと、 当該第 1の背フレ 一ムに傾動可能に取り付けられた少なくとも 1つの第 2の背フレームとを有する 背支持部材と、 背板屈曲領域と、 当該背板屈曲領域よりも上側に位置する背板上 部と、 背板屈曲領域よりも下側に位置する背板下部とを有する背板を備え、 背板 上部と背板下部のうちいずれか一方が第 1の背フレームに固定されると共に、 い ずれか他方が第 2の背フレームに支持されており、 背板屈曲領域を変形させて一 方に対して他方を前後方向に倒すことで背板は全体として屈曲可能であり、 第 1 の背フレームに対する第 2の背フレームの傾動角度を調整することで背板の屈曲 角度を変化させ且つ屈曲角度を固定する屈曲角度調整機構を備えるものである。  In order to achieve the object, a chair backrest structure of the present invention includes at least one first back frame tiltably attached to a seat receiving member, and a tiltably attached to the first back frame. A back support member having at least one second back frame, a back plate bending region, a back plate upper portion located above the back plate bending region, and a lower side of the back plate bending region. A back plate having a lower back plate positioned thereon, and one of the upper back plate and the lower back plate is fixed to the first back frame, and one of the other is supported by the second back frame. The backboard can be bent as a whole by deforming the backboard bending area and tilting the other back and forth with respect to one side, and adjusts the tilt angle of the second backframe with respect to the first backframe. To change the bending angle of the backboard And a bending angle adjusting mechanism for fixing the bending angle.
したがって、 屈曲角度調整機構を操作して背板の屈曲角度を好みの角度に調整 することができる。 背板の屈曲角度を好みの角度に調整した後、 屈曲角度調整機 構を操作して屈曲角度を固定、 即ち屈曲角度が変化しないようにする。 着座者が 背板に強く寄り掛かつても、 屈曲角度調整機構によつて背板の屈曲角度が維持さ れる。 このように、 背板の屈曲角度を好みの角度に調整した状態で使用すること ができるので、 椅子の座り心地ゃ使レ、勝手を向上させることができる。 Therefore, the bending angle of the backboard can be adjusted to a desired angle by operating the bending angle adjusting mechanism. After adjusting the bending angle of the backboard to the desired angle, operate the bending angle adjustment mechanism to fix the bending angle, that is, to prevent the bending angle from changing. Even if the occupant leans strongly against the back plate, the bending angle of the back plate is maintained by the bending angle adjustment mechanism. It is. As described above, the back plate can be used in a state where the bending angle is adjusted to a desired angle, so that it is possible to improve the sitting comfort, use, and operability of the chair.
また、 本発明の背凭れ構造は、 背板下部を第 1の背フレームに固定すると共に、 背板上部を前後方向に傾動可能にし、 屈曲角度調整機構を、 下端が第 1の背フレ ームに連結されて当該連結点を中心に上端が前後方向に傾動可能とされた第 2の 背フレームと、 第 2の背フレームの上端を背板上部にこれらの相対変位を吸収し ながら連結する連結手段と、 第 1の背フレームと第 2の背フレームの間の連結点 力、ら離れた位置に設けられて第 1の背フレームと第 2の背フレームとの間の距離 を変化させる変位手段を備えるものである。  In addition, the backrest structure of the present invention includes a lower back plate fixed to the first back frame, an upper back plate tiltable in the front-rear direction, a bending angle adjustment mechanism, and a lower end of the first back frame. A second back frame, the upper end of which can be tilted in the front-rear direction around the connection point, and a connection connecting the upper end of the second back frame to the upper part of the back plate while absorbing these relative displacements Means, a connecting point force between the first back frame and the second back frame, and a displacement means provided at a remote position to change a distance between the first back frame and the second back frame. It is provided with.
したがって、 変位手段を操作して第 1の背フレームと第 2の背フレームの距離 を変化させると、 第 1の背フレームに対して第 2の背フレームが傾動する。 第 2 の背フレームの上端は背板上部に連結されているので、 第 2の背フレームの傾動 によって背板の屈曲角度が変化する。 このとき、 第 2の背フレームの上端の移動 量と背板の第 2の背フレーム連結部分の移動量が相違するため、 第 2の背フレー ムの上端と背板の第 2の背フレーム連結部分との間に相対変位が生じるが、 この 相対変位を連結部分が吸収し、 第 2の背フレームの傾動と背板の屈曲をスムーズ にする。 つまり、 変位手段の操作によって背板の屈曲角度を調整することができ、 簡単な調整操作で背板の屈曲角度を好みの角度に調整することができる。 また、 第 2の背フレームの上端と背板の第 2の背フレーム連結部分との間に生じる相対 変位を連結手段によって吸収することができるので、 機構を成立させることがで さる。  Therefore, when the distance between the first back frame and the second back frame is changed by operating the displacement means, the second back frame tilts with respect to the first back frame. Since the upper end of the second back frame is connected to the upper portion of the back plate, the tilt angle of the second back frame changes the bending angle of the back plate. At this time, since the amount of movement of the upper end of the second back frame is different from the amount of movement of the second back frame connecting portion of the back plate, the upper end of the second back frame is connected to the second back frame of the back plate. Although the relative displacement occurs between the first and second portions, the connecting portion absorbs the relative displacement, and makes the tilting of the second back frame and the bending of the back plate smooth. That is, the bending angle of the backboard can be adjusted by operating the displacement means, and the bending angle of the backboard can be adjusted to a desired angle by a simple adjustment operation. In addition, since the relative displacement generated between the upper end of the second back frame and the second back frame connecting portion of the back plate can be absorbed by the connecting means, the mechanism can be established.
また、 本発明の椅子の背凭れ構造は、 変形可能な背板と、 少なくとも背板に連 結される部分が可撓性を有する樹脂によって形成された少なくとも 1つの背支持 部材とを備えるものである。 したがって、 着座者が背板に寄り掛かると、 加わる 荷重の大きさ、 方向並びに位置に応じて背支持部材が撓むと共に背板を変形し易 くするため、 着座者の姿勢や動きに追従して背板が変形し、 凭れ心地を向上させ ることができる。  The backrest structure of a chair according to the present invention includes a deformable backplate and at least one back support member at least a portion connected to the backplate is formed of a flexible resin. is there. Therefore, when the occupant leans on the back plate, the back support member flexes according to the magnitude, direction, and position of the applied load, and the back plate is easily deformed. The back plate is deformed, so that the leaning comfort can be improved.
また、 本発明の椅子の背凭れ構造は、 背支持部材の上端を背板の上部にこれら の相対変位を吸収しながら連結する連結手段を備えるものである。 この場合、 背 板を変形させると、 背支持部材の上端と背板の背支持部材連結部分との間に相対 変位が生じるが、 この相対変位を連結部分が吸収し、 背板をより大きく且つより スムーズに変形させる。 つまり、 背支持部材と背板の相対変位を連結手段によつ て吸収することができる。 このため、 背支持部材と背板の連結部分に無理な力が かかるのを防止することができ、 背板をより一層変形しやすくすることができて 凭れ心地をより一層向上させることができる。 Further, the backrest structure of the chair according to the present invention includes a connecting means for connecting the upper end of the back support member to the upper part of the back plate while absorbing these relative displacements. In this case, When the plate is deformed, a relative displacement occurs between the upper end of the back support member and the connecting portion of the back support member of the back plate, but the connection portion absorbs the relative displacement, and the back plate is deformed larger and more smoothly. Let it. That is, the relative displacement between the back support member and the back plate can be absorbed by the connecting means. For this reason, it is possible to prevent an excessive force from being applied to the connecting portion between the back support member and the back plate, and it is possible to further easily deform the back plate, thereby further improving the reclining comfort.
また、 本発明の椅子の背凭れ構造は、 座受け部材に傾動可能に取り付けられた 少なくとも 1つの第 1の背フレームと、 当該第 1の背フレームに傾動可能に取り 付けられた少なくとも 1つの第 2の背フレームとを有する背支持部材と、 背板屈 曲領域と、 当該背板屈曲領域よりも上側に位置する背板上部と、 背板屈曲領域よ りも下側に位置し且つ第 1の背フレームに固定された背板下部とを有する背板と、 第 2の背フレームの上端を背板上部にこれらの相対変位を吸収しながら連結する 連結手段とを備え、 背板屈曲領域を変形させて背板下部に対して背板上部を前後 方向に倒すことで背板は全体として屈曲可能であり、 背板の少なくとも背板上部 は変形可能であると共に、 第 2の背フレームは可撓性を有する樹脂によって形成 されているものである。  Further, the backrest structure of the chair according to the present invention includes: at least one first back frame tiltably attached to the seat receiving member; and at least one first back frame tiltably attached to the first back frame. A back support member having a second back frame, a back plate bending region, an upper portion of the back plate positioned above the back plate bending region, and a first position positioned below the back plate bending region and And a connecting means for connecting the upper end of the second back frame to the upper part of the backboard while absorbing these relative displacements. By deforming and tilting the upper part of the backboard in the front-back direction with respect to the lower part of the backboard, the backboard can be bent as a whole, and at least the upper part of the backboard can be deformed, and the second back frame can be used. It is made of flexible resin It is.
したがって、 着座者が背板に寄り掛かると、 第 2の背フレームが背板上部を傾 動させるので背板を背板屈曲領域を中心に前後方向に屈曲させることができる。 同時に、 第 2の背フレームが加わる荷重の大きさ、 方向並びに位置に応じて橈ん で背板を変形し易くし、 背板を着座者の姿勢に追従して捻りを伴つた変形や局部 的変形をし易くする。 このため、 凭れ心地を向上させることができる。  Therefore, when the seated person leans on the backboard, the second back frame tilts the upper part of the backboard, so that the backboard can be bent in the front-rear direction around the backboard bending area. At the same time, the back plate is easily deformed with a radius depending on the magnitude, direction, and position of the load applied to the second back frame, and the back plate follows the posture of the seated person and is deformed with twisting or locally. Easy to deform. Therefore, the leaning comfort can be improved.
また、 本発明の椅子の背凭れ構造は、 座受け部材に傾動可能に取り付けられた 少なくとも 1つの第 1の背フレームと、 当該第 1の背フレームに傾動可能に取り 付けられた少なくとも 1つの第 2の背フレームとを有する背支持部材と、 背板屈 曲領域と、 当該背板屈曲領域よりも上側に位置する背板上部と、 背板屈曲領域よ りも下側に位置し且つ第 1の背フレームに固定された背板下部とを有する背板を 備え、 背板屈曲領域を変形させて背板下部に対して背板上部を前後方向に倒すこ とで背板は全体として屈曲可能であり、 第 1の背フレームに対する第 2の背フレ 一ムの傾動角度を調整することで背板の屈曲角度を変化させ且つ屈曲角度を固定 する屈曲角度調整機構を備えると共に、 屈曲角度調整機構は、 下端が第 1の背フ レームに連結されて当該連結点を中心に上端が前後方向に傾動可能とされた第 2 の背フレームと、 第 2の背フレームの上端を背板上部にこれらの相対変位を吸収 しながら連結する連結手段と、 第 1の背フレームと第 2の背フレームの間の連結 点から離れた位置に設けられて第 1の背フレームと第 2の背フレームとの間の距 離を変化させる変位手段を有し、 背板の少なくとも背板上部は変形可能であると 共に、 第 2の背フレームは可撓性を有する樹脂によって形成されているものであ る。 Further, the backrest structure of the chair according to the present invention includes: at least one first back frame tiltably attached to the seat receiving member; and at least one first back frame tiltably attached to the first back frame. A back support member having a second back frame, a back plate bending region, an upper portion of the back plate positioned above the back plate bending region, and a first position positioned below the back plate bending region and The backboard has a backboard fixed to the back frame of the backboard, and the backboard can be bent as a whole by deforming the bending area of the backboard and tilting the top of the backboard forward and backward with respect to the lower backboard The bending angle of the back plate is changed and the bending angle is fixed by adjusting the tilt angle of the second back frame with respect to the first back frame. A second back frame having a lower end connected to the first back frame and an upper end capable of tilting in the front-rear direction about the connection point; Connecting means for connecting the upper end of the second back frame to the upper part of the back plate while absorbing these relative displacements, and provided at a position distant from a connection point between the first back frame and the second back frame. Displacement means for changing the distance between the first back frame and the second back frame, wherein at least the upper part of the back plate is deformable, and the second back frame is flexible It is formed of a resin having
この場合、 着座者が背板に寄り掛かると、 加わる荷重の大きさ、 方向並びに位 置に応じて第 2の背フレームが撓み変形可能な背板を変形し易くする。 つまり、 背板の変形が第 2の背フレームによって妨げられることを抑制することができる ので、 着座者の姿勢や動きに追従して背板が局部的にあるいは捻りを伴って変形 しゃすくなり、 凭れ心地を向上させることができる。 また、 屈曲角度調整機構を 操作して背板の屈曲領域を中心とした前後方向屈曲角度を好みの角度に調整する ことができる。 背板の屈曲角度を好みの角度に調整した後、 その屈曲角度を固定 すれば、 着座者が背板に強く寄り掛かっても、 屈曲角度調整機構によって背板の 屈曲角度が維持される。  In this case, when the occupant leans on the back plate, the second back frame bends easily according to the magnitude, direction, and position of the applied load, so that the deformable back plate is easily deformed. In other words, it is possible to suppress the deformation of the back plate from being hindered by the second back frame, so that the back plate deforms locally or with a twist according to the posture and movement of the seated person, The leaning comfort can be improved. In addition, by operating the bending angle adjusting mechanism, the bending angle in the front-rear direction around the bending region of the backboard can be adjusted to a desired angle. If the bending angle of the backboard is adjusted to the desired angle and the bending angle is fixed, the bending angle of the backboard is maintained by the bending angle adjustment mechanism even if the occupant leans strongly against the backboard.
即ち、 変位手段を操作して第 1の背フレームと第 2の背フレームの距離を変化 させると、 第 1の背フレームに対して第 2の背フレームが傾動する。 第 2の背フ レームの上端は背板上部に連結されているので、 第 2の背フレームの傾動によつ て背板の屈曲角度が変化する。 このとき、 第 2の背フレームの上端の移動量と背 板の第 2の背フレーム連結部分の移動量が相違するため、 第 2の背フレームの上 端と背板の第 2の背フレーム連結部分との間に相対変位が生じるが、 この相対変 位を連結部分が吸収し、 第 2の背フレームの傾動と背板の屈曲をスムーズにする。 つまり、 変位手段の操作によって背板の屈曲角度を調整することができ、 簡単 な調整操作で背板の屈曲角度を好みの角度に調整することができる。 また、 第 2 の背フレームの上端と背板の第 2の背フレーム連結部分との間に生じる相対変位 を連結手段によって吸収することができるので、 機構を成立させることができる。 また、 本発明の椅子の背凭れ構造は、 変位手段は、 第 1の背フレームと第 2の 背フレームのいずれか一方に設けられた調整ねじと、 いずれか他方に設けられ調 整ねじが挿入されるねじ孔を有する雌ねじ部材と、 調整ねじと雌ねじ部材のうち 少なくとも一方の角度を上下方向に変化させる角度変化手段を備えたものである。 That is, when the distance between the first back frame and the second back frame is changed by operating the displacement means, the second back frame tilts with respect to the first back frame. Since the upper end of the second back frame is connected to the upper part of the back plate, the tilt angle of the second back frame changes the bending angle of the back plate. At this time, since the amount of movement of the upper end of the second back frame is different from the amount of movement of the second back frame connecting portion of the back plate, the upper end of the second back frame is connected to the second back frame of the back plate. Although the relative displacement occurs between the first and second portions, the connecting portion absorbs the relative displacement, and makes the tilting of the second back frame and the bending of the back plate smooth. That is, the bending angle of the back plate can be adjusted by operating the displacement means, and the bending angle of the back plate can be adjusted to a desired angle by a simple adjustment operation. In addition, since the relative displacement generated between the upper end of the second back frame and the second back frame connecting portion of the back plate can be absorbed by the connecting means, the mechanism can be established. Further, in the backrest structure of the chair according to the present invention, the displacement means includes a first back frame and a second back frame. An adjusting screw provided on one of the back frames, a female screw member provided on one of the other sides and having a screw hole into which the adjusting screw is inserted, and an angle of at least one of the adjusting screw and the female screw member in a vertical direction. It is provided with angle changing means for changing.
したがって、 調整ねじを回転操作すると、 雌ねじ部材のねじ孔へのねじ込み量 が変化する。 このため、 第 1の背フレームと第 2の背フレームの連結点から離れ た位置における第 1の背フレームと第 2の背フレームの間の距離が変化し、 第 2 の背フレームの傾動角度が変化して背板の屈曲角度が変化する。 即ち、 調整ねじ の回転操作によって背板の屈曲角度を調整することができる。 また、 第 2の背フ レームの傾動角度と背板の屈曲角度の変化に伴い、 変位手段の調整ねじとねじ孔 の対向角度も変化するが、 この変化を角度変化手段が吸収するので、 変位手段に 無理な力が発生することがなく、 軽！/、力で操作することができる。  Therefore, when the adjusting screw is rotated, the screwing amount of the female screw member into the screw hole changes. Therefore, the distance between the first back frame and the second back frame at a position apart from the connection point between the first back frame and the second back frame changes, and the tilt angle of the second back frame changes. And the bending angle of the backboard changes. That is, the bending angle of the back plate can be adjusted by rotating the adjusting screw. In addition, with the change in the tilt angle of the second back frame and the bending angle of the back plate, the opposing angle between the adjusting screw of the displacement means and the screw hole also changes, but this change is absorbed by the angle change means, so the displacement No excessive force is generated in the means, light! / Can be operated by force.
また、 本発明の椅子の背凭れ構造において、 連結手段は、 第 2の背フレームの 少なくとも上端に形成された円形の輪郭を有する軸部と、 軸部に相対回転自在且 つ軸方向に摺動自在な連結部と、 連結部を背板に上下方向に回転自在に取りつけ る軸支手段を備え、 連結部は軸部から脱落しない程度の長さを有している。  In the backrest structure for a chair according to the present invention, the connecting means includes a shaft portion having a circular contour formed at least at an upper end of the second back frame, and is relatively rotatable relative to the shaft portion and slidable in the axial direction. It has a flexible connecting portion and a shaft supporting means for attaching the connecting portion to the back plate so as to be rotatable in a vertical direction, and the connecting portion has a length that does not fall off the shaft portion.
したがって、 軸部に対して例えばキャップ状の連結部が軸方向に摺動すること で、 第 2の背フレームの軸方向の相対変位を吸収する。 また、 背板に対して連結 部が上下方向に回転、 即ち角度変化することで、 第 2の背フレームと背板の上下 方向の角度変化を吸収する。 さらに、 軸部に対して連結部が回転することで、 第 2の背フレームと背板の水平方向の角度変化を吸収する。 つまり、 第 2の背フレ 一ムの軸方向の相対変位、 第 2の背フレームと背板の上下方向の角度変化、 第 2 の背フレームと背板の水平方向の角度変化をそれぞれ良好に吸収することができ る。  Therefore, the relative displacement of the second back frame in the axial direction is absorbed by, for example, the cap-shaped connecting portion sliding in the axial direction with respect to the shaft portion. In addition, the vertical rotation of the connecting portion with respect to the back plate, that is, the angle change, absorbs the change in the vertical angle between the second back frame and the back plate. Further, the rotation of the connecting portion with respect to the shaft portion absorbs a change in the horizontal angle between the second back frame and the back plate. In other words, the relative displacement in the axial direction of the second back frame, the change in the vertical angle between the second back frame and the back plate, and the change in the horizontal angle between the second back frame and the back plate are well absorbed. can do.
また、 本発明の椅子の背凭れ構造において、 連結手段は、 第 2の背フレームの 少なくとも上端に形成された円形の輪郭を有する軸部と、 背板の背面に設けられ 且つ軸部が下方から揷入され該軸部の傾斜を許容する揷入口が形成された軸部受 けと、 軸部受けの上方に設けられ、 軸部の先端の動きを許容する空間を画する部 材を備えたものである。  Further, in the backrest structure of the chair of the present invention, the connecting means includes a shaft portion having a circular contour formed at least at an upper end of the second back frame; A shaft receiver having an inlet formed therein, and a member provided above the shaft receiver and defining a space for allowing movement of the tip of the shaft portion. Things.
したがって、 軸部受けに対して軸部が軸方向に移動することで、 第 2の背フレ 一ムの軸方向の相対変位を吸収する。 また、 揷入口に対して軸部がみそすり運動 をすることで、 第 2の背フレームと背板の上下方向の角度変化及び左右方向の角 度変化を吸収する。 さらに、 軸部受けに対して軸部が回転することで、 第 2の背 フレームと背板の水平方向の角度変化を吸収する。 これらの結果、 第 2の背フレ 一ムと背板の連結部分の動きの自由度を向上させることができる。 また、 構成部 品の点数が減少し、 これに伴い製造工程も減少するので、 製造コストを下げるこ とができる。 Therefore, when the shaft moves in the axial direction with respect to the shaft receiver, the second back frame is moved. Absorbs relative displacement in the axial direction of one meter. (4) The shaft portion makes a razor movement with respect to the entrance, thereby absorbing a vertical angle change and a horizontal angle change between the second back frame and the back plate. Further, the rotation of the shaft with respect to the shaft receiver absorbs a change in the horizontal angle between the second back frame and the back plate. As a result, the degree of freedom of movement of the connecting portion between the second back frame and the back plate can be improved. In addition, the number of components is reduced, and the number of manufacturing processes is accordingly reduced, so that manufacturing costs can be reduced.
また、 本発明の椅子の背凭れ構造は、 背板屈曲領域に少なくとも 1つのスリ ッ トを形成することで背板上部又は背板下部を前後方向に傾動可能にしたものであ る。 この場合、 背板は、 スリッ トの存在により剛性が局部的に低下し、 この意図 的に剛性を低下させた部分即ち背板屈曲領域で変形し易くなり、 背板上部又は背 板下部を前後方向に容易に傾動させ得る。 つまり、 簡単な構成で背板を前後方向 に屈曲させることができる。 この場合、 スリ ッ トの形状を少なくと一方向に突出 する形状例えば U字形状にすれば背板の一部を突出させてサポート部を形成する ことができる。 また、 スリ ッ トの形状を直線形状にすることで、 背板の一部が突 出するのを防止することができる。 尚、 背板屈曲領域は任意の位置での背板の屈 曲を可能とするため意図的に形成されているが、 場合によっては結果的に屈曲変 形する領域も含まれ、 背板の固定部分と連結部分の間に形成されるものである。 ： また、 本発明の椅子の背凭れ構造は、 背板の上端に背凭れを補助するサポート 部材を回転可能に取り付けると共に、 サポート部材と第 1の背フレームをリンク によって連結し、 背板の屈曲に連動してサポート部材を回転させるものである。 したがつて、 着座者が背板に寄り掛かりながら頭部等を起こす姿勢をとっても、 頭部等をサポート部材でサポートすることができる。 このため、 椅子の使い勝手 を向上させることができる。  Further, in the backrest structure of the chair of the present invention, at least one slit is formed in the backboard bending region so that the upper portion or the lower portion of the backboard can be tilted in the front-rear direction. In this case, the rigidity of the back plate is locally reduced due to the presence of the slit, and the back plate is easily deformed in the portion where the rigidity is intentionally reduced, that is, in the bent region of the back plate. It can be easily tilted in any direction. That is, the back plate can be bent in the front-rear direction with a simple configuration. In this case, if the shape of the slit is at least a shape protruding in one direction, for example, a U-shape, a part of the back plate can be protruded to form the support portion. Further, by making the shape of the slit linear, it is possible to prevent a part of the back plate from protruding. The back plate bending area is intentionally formed to enable bending of the back plate at an arbitrary position.However, in some cases, a region where the back plate is bent and deformed is also included, and the back plate is fixed. It is formed between the portion and the connecting portion. The backrest structure of the chair according to the present invention is further characterized in that a support member for assisting the backrest is rotatably attached to the upper end of the backboard, and the support member and the first back frame are connected by a link, thereby bending the backboard. The support member is rotated in conjunction with. Therefore, even if the occupant leans against the backboard and takes a posture in which the head is raised, the head and the like can be supported by the support member. For this reason, the usability of the chair can be improved.
さらに、 本発明の椅子の背凭れ構造は、 樹脂は、 ガラス入りナイロンであって い。  Further, in the backrest structure of the chair of the present invention, the resin is glass-filled nylon.
図面の簡単な説明  BRIEF DESCRIPTION OF THE FIGURES
Fig. 1は本発明の椅子の背凭れ構造の一実施形態を示す断面図である。 Fig. 2 は同椅子の背凭れ構造を示し、 背板を大きく屈曲させた状態を示す断面図である。 Fig. 3は同椅子の背凭れ構造の背板を示す背面図である。 Fig. 4は同椅子の背凭 れ構造の連結手段を示し、 その上方からみた断面図である。 Fig. 5は同連結手段 を示し、 その側方からみた断面図である。 Fig. 6は同椅子の背凭れ構造の変位手 段の第 1の例を示す断面図である。 Fig. 7は同変位手段を示し、 背板を大きく屈 曲させた状態の断面図である。 Fig. 8は同変位手段の角度変化手段を示す斜視図 である。 Fig. 9は同背凭れ構造に取りつけられているガススプリングを示す平面 図である。 Fig. 1 0は同ガススプリングを示す側面図である。 Fig. 1 1は同椅子 の背凭れ構造のカバーを示す背面図である。 Fig. 1 2は同カバーを背板に取り付 けた様子を示す背面図である。 Fig. 1 3は本発明の椅子の背凭れ構造を構成する 連結手段の他の実施形態を示す側面図である。 Fig. 1 4は同椅子の背凭れ構造の 変位手段の第 2の例を示す断面図である。 Fig. 1 5は同変位手段の第 2の例を示 し、 背板を大きく屈曲させた状態の断面図である。 Fig. 1 6は同椅子の背凭れ構 造の変位手段の第 3の例を示す断面図である。 Fig. 1 7は同変位手段の第 3の例 を示し、 背板を大きく屈曲させた状態の断面図である。 Fig. 1 8は同椅子の背凭 れ構造の変位手段の第 4の例を示す断面図である。 Fig. 1 9は同変位手段の第 4 の例を示し、 背板を大きく屈曲させた状態の断面図である。 Fig. 2 0は本発明の 椅子の背凭れ構造の第 1の変形例を示す側面図である。 Fig. 2 1は本発明の椅子 の背凭れ構造の第 2の実施形態を示し、 背板の下部を前方に傾動させた様子を示 す側面図である。 Fig. 2 2は Fig. 2 0の椅子の使用状態を示す図である。 Fig. 2 3は同椅子の使用状態を示す図で、 背板の下部を前方に傾動させた様子を示す図 である。 Fig. 2 4は本発明の椅子の背凭れ構造の第 3の実施形態を示す側面図で ある。 Fig. 2 5は本発明の椅子の背凭れ構造の第 2の変形例を示し、 背板の下部 を前方に傾動させた様子を示す側面図である。 Fig. 2 6は本発明の椅子の背凭れ 構造の第 4の実施形態を示す断面図である。 Fig, 2 7は Fig. 2 6の背凭れ構造を 適用した椅子の使用状態を示し、 子供が使用する様子を示す図である。 Fig. 2 8 は Fig. 2 6の背凭れ構造を適用した椅子の使用状態を示し、 大人が使用する様子 を示す図である。 Fig. 2 9は本発明を適用した椅子の背凭れ構造の第 5の実施形 態を示し、 へッドレストを後方に移動させている状態の断面図である。 Fig. 3 0 は同椅子の背凭れ構造の第 5の実施形態を示し、 へッドレストを前方に移動させ ている状態の断面図である。 Fig. 3 1は Fig. 2 9の背凭れ構造を適用した椅子の 使用状態を示し、 へッドレストを後方に移動させている状態の図である。 Fig. 3 2は同背凭れ構造を適用した椅子の使用状態を示し、 へッドレストを前方に移動 させ、 背凭れ全体をリクライニングさせている状態の図である。 Fig. 3 3は背板 のスリツトに段部を設けた様子を示す背面図である。 Fig. 3 4は背板に 2本のス リットを設けた様子を示す背面図である。 Fig. 3 5は背板に 1本のスリットを設 けた様子を示す背面図である。 Fig. 3 6は本発明を適用した椅子の背凭れ構造を 構成する連結手段の別の実施形態を示す断面図である。 Fig. 3 7は挿入口の形状 と凸部の動きを説明するための概念図である。 Fig. 3 8は本発明を適用した椅子 の背凭れ構造を構成する連結手段の更に別の実施形態を示す断面図である。 Fig. 3 9は本発明の椅子の背凭れ構造の第 6の実施形態を示し、 サポート部材として 着座者の肩甲骨の部分から頭部までをサポートするサポート体を備え、 このサボ 一ト体を後方に移動させている状態の図である。 Fig. 4 0は同背凭れ構造の第 6 の実施形態を示し、 サポート体を前方に移動させ、 背凭れ全体をリクライニング させている状態の図である。 Fig. 4 1は背板の上部が捩れるようにして変形する 様子を示す斜視図である。 Fig. 4 2は背板の中央が後方に突出するように変形す る様子を示す斜視図である。 Fig. 4 3は背板の片側が後方に突出するように変形 する様子を示す斜視図である。 Fig. 4 4は本発明の椅子の背凭れ構造の第 7の実 施形態を示す第 1の背フレームと背板と第 2の背フレームの概略構成図である。 Fig. 4 5は本発明の椅子の背凭れ構造の第 7の実施形態を示し、 背板をリクライ ユングさせた状態の第 1の背フレームと背板と第 2の背フレームの概略構成図で ある。 Fig. 4 6は従来の椅子の背凭れ構造を示す側面図である。 Fig. 4 7は従来 の他の椅子の背凭れ構造を示す側面図である。 FIG. 1 is a sectional view showing an embodiment of a backrest structure of a chair according to the present invention. Fig. 2 is a cross-sectional view showing the backrest structure of the chair, with the backboard bent significantly. Fig. 3 is a rear view showing the back plate of the backrest structure of the chair. Fig. 4 shows the connecting means of the backrest structure of the chair, and is a cross-sectional view seen from above. Fig. 5 shows the connecting means and is a cross-sectional view from the side. Fig. 6 is a cross-sectional view showing a first example of a displacement means of the backrest structure of the chair. Fig. 7 shows the same displacement means, and is a cross-sectional view of the back plate with the back plate bent significantly. Fig. 8 is a perspective view showing the angle changing means of the displacement means. Fig. 9 is a plan view showing the gas spring attached to the backrest structure. Fig. 10 is a side view showing the gas spring. Fig. 11 is a rear view showing the cover of the backrest structure of the chair. Fig. 12 is a rear view showing the cover attached to the back plate. Fig. 13 is a side view showing another embodiment of the connecting means constituting the backrest structure of the chair of the present invention. Fig. 14 is a sectional view showing a second example of the displacement means of the backrest structure of the chair. Fig. 15 shows a second example of the displacement means, and is a cross-sectional view in a state where the back plate is greatly bent. Fig. 16 is a sectional view showing a third example of the displacement means of the backrest structure of the chair. Fig. 17 shows a third example of the displacement means, and is a cross-sectional view of the state where the back plate is greatly bent. Fig. 18 is a sectional view showing a fourth example of the displacement means of the backrest structure of the chair. Fig. 19 shows a fourth example of the displacement means, and is a cross-sectional view of the back plate with the back plate largely bent. FIG. 20 is a side view showing a first modification of the backrest structure of the chair of the present invention. Fig. 21 is a side view showing a second embodiment of the backrest structure of the chair of the present invention, showing a state where the lower portion of the backboard is tilted forward. Fig. 22 is a diagram showing the use state of the chair of Fig. 20. Fig. 23 shows the chair in use, showing the lower part of the backboard tilted forward. Fig. 24 is a side view showing a third embodiment of the backrest structure of the chair of the present invention. Fig. 25 is a side view showing a second modification of the backrest structure of the chair of the present invention, and showing a state where the lower portion of the backboard is tilted forward. Fig. 26 is a sectional view showing a fourth embodiment of the backrest structure of the chair according to the present invention. Fig. 27 shows the use state of the chair to which the backrest structure of Fig. 26 is applied, and shows how the chair is used by children. Fig. 28 shows the use of the chair to which the backrest structure of Fig. 26 is applied, showing how an adult uses it. Fig. 29 shows a fifth embodiment of the backrest structure of the chair to which the present invention is applied, and is a cross-sectional view showing a state where the headrest is moved rearward. Fig. 30 shows a fifth embodiment of the backrest structure of the chair, in which the headrest is moved forward. FIG. Fig. 31 shows the use state of the chair to which the backrest structure of Fig. 29 is applied, in which the headrest is moved backward. Fig. 32 shows the use state of the chair to which the backrest structure is applied, in which the headrest is moved forward and the entire backrest is reclined. Fig. 33 is a rear view showing the slits on the back plate with steps. Fig. 34 is a rear view showing the appearance of two slits on the back plate. Fig. 35 is a rear view showing a single slit in the back plate. Fig. 36 is a cross-sectional view showing another embodiment of the connecting means constituting the backrest structure of the chair to which the present invention is applied. Fig. 37 is a conceptual diagram for explaining the shape of the insertion port and the movement of the projection. Fig. 38 is a sectional view showing still another embodiment of the connecting means constituting the backrest structure of the chair to which the present invention is applied. Fig. 39 shows a sixth embodiment of the backrest structure of the chair according to the present invention, which is provided with a support member for supporting from the scapula portion of the seated person to the head as a support member. It is a figure of the state where it is moving back. FIG. 40 shows a sixth embodiment of the backrest structure, in which the support body is moved forward and the entire backrest is reclined. Fig. 41 is a perspective view showing how the upper part of the backboard is twisted and deformed. Fig. 42 is a perspective view showing how the center of the back plate is deformed so as to protrude backward. Fig. 43 is a perspective view showing how the back plate is deformed so that one side protrudes backward. FIG. 44 is a schematic configuration diagram of a first back frame, a back plate, and a second back frame showing a seventh embodiment of the backrest structure of the chair of the present invention. Fig. 45 shows a seventh embodiment of the backrest structure of the chair of the present invention, and is a schematic configuration diagram of the first back frame, the back plate, and the second back frame with the back plate reclining. is there. Fig. 46 is a side view showing the backrest structure of a conventional chair. Fig. 47 is a side view showing the backrest structure of another conventional chair.
発明を実施するための最良の形態  BEST MODE FOR CARRYING OUT THE INVENTION
以下、 本発明の構成を図面に示す最良の形態に基づいて詳細に説明する。 なお、 各実施形態について同一の部材には同一の符号を付し、 重複する説明は省略する。  Hereinafter, the configuration of the present invention will be described in detail based on the best mode shown in the drawings. In each of the embodiments, the same members are denoted by the same reference numerals, and redundant description will be omitted.
Fig. l〜Fig. 1 2に、 本発明の椅子の背凭れ構造の第 1の実施形態を示す。 こ の椅子の背凭れ構造 （以下、 単に背凭れ構造という） は、 座受け部材 8に傾動可 能に取り付けられた少なくとも 1つの第 1の背フレーム 1と該第 1の背フレーム 1に傾動可能に取り付けられた少なくとも 1つの第 2の背フレーム 5とを有する 背支持部材 6 1と、 背板屈曲領域 2 eを有し該背板屈曲領域 2 eよりも上側の背 板上部 2 aと背板屈曲領域 2 eよりも下側の背板下部 2 bとを有する背板 2とが 備えられている。 背板上部 2 aと背板下部 2 bのうちのいずれか一方が第 1の背 フレーム 1に固定されると共に、 他方が第 2の背フレーム 5に支持されており、 背板屈曲領域 2 eを中心に変形させて背板下部 2 b若しくは背板上部 2 aに対し て背板上部 2 a若しくは背板下部 2 bを前後方向に傾けることで、 背板 2は全体 として屈曲可能となっている。 1 to 12 show a first embodiment of a backrest structure for a chair according to the present invention. The backrest structure of the chair (hereinafter, simply referred to as a backrest structure) includes at least one first back frame 1 that is tiltably attached to the seat receiving member 8 and the first back frame. A back support member 61 having at least one second back frame 5 tiltably attached to 1; and a back plate upper portion having a back plate bending region 2 e and being higher than the back plate bending region 2 e. A back plate 2 having a back plate 2a and a back plate lower portion 2b below the back plate bending region 2e is provided. One of the upper back plate 2a and the lower back plate 2b is fixed to the first back frame 1, and the other is supported by the second back frame 5, and the back plate bending area 2e By tilting the upper back 2a or the lower back 2b in the front-back direction with respect to the lower back 2b or the upper back 2a, the back plate 2 can be bent as a whole. I have.
本実施形態の背凭れ構造は、 背板下部 2 bが第 1の背フレーム 1に固定される と共に、 背板上部 2 aが第 2の背フレーム 5に前後方向に連繋可能に連結されて 支持されており、 背板下部 2 bに対して背板上部 2 aを前後方向に傾けることで 背板屈曲領域 2 eを変形させて背板 2が屈曲領域 2 eを中心に屈曲可能に設けら れている。 ただし、 背板 2の背支持部材 6 1に対する取り付け関係は、 上述の実 施形態に限られず、 背板上部 2 aが第 1の背フレーム 1に固定されると共に、 背 板下部 2 bが第 2の背フレーム 5に支持されるようにしても良い。  In the backrest structure of the present embodiment, the back plate lower portion 2b is fixed to the first back frame 1, and the back plate upper portion 2a is connected to the second back frame 5 so as to be able to be linked in the front-rear direction. By tilting the upper back plate 2a in the front-rear direction with respect to the lower back plate 2b, the back plate bending region 2e is deformed so that the back plate 2 can be bent around the bending region 2e. Have been. However, the mounting relationship of the back plate 2 to the back support member 61 is not limited to the above embodiment, and the upper portion 2a of the back plate is fixed to the first back frame 1 and the lower portion 2b of the back plate 2 The support frame 2 may be supported by the back frame 5.
なお、 本実施形態の背凭れ構造における背凭れを支える背支持部材 6 1は、 座 受け部材 8に揺動可能に取り付けられた 2枚の側板 1 dが背板取付壁 1 f と補強 板 1 g等で連結されて一体化された 1つの第 1の背フレーム 1と、 この第 1の背 フレーム 1の側板 1 dに対しそれぞれ傾動可能に取り付けられた 2本のスチール パイプ等の剛体の棒状物を接続板 1 1， 1 2で連結して一体化した 1つの第 2の 背フレーム 5とで構成されている。  The back support member 61 for supporting the backrest in the backrest structure of the present embodiment is composed of two side plates 1 d swingably mounted on the seat member 8 and a back plate mounting wall 1 f and a reinforcing plate 1. One first back frame 1 connected and integrated with g, etc., and two rigid rod-like rods such as steel pipes that are attached to the side plate 1 d of the first back frame 1 so as to be tiltable. It is composed of one second back frame 5 in which objects are connected by connecting plates 11 and 12 and integrated.
また、 背凭れ構造は、 第 1の背フレーム 1に対する第 2の背フレーム 5の傾動 角度を調整かつ固定することで背板 2の屈曲角度を変化させ且つ屈曲角度を固定 する屈曲角度調整機構 3が備えられている。 本実施形態の屈曲角度調整機構 3は、 送りねじ機構を利用したもので、 第 1の背フレーム 1と第 2の背フレーム 5との 間の間隔を可変としたものである。 即ち、 第 2の背フレーム 5は、 その下端が第 1の背フレーム 1の後端にピン 4で連結されて当該連結ピン 4を中心に前後方向 に傾動可能に設けられている。 この第 2の背フレーム5と、 第 2の背フレーム5 の上端を背板上部 2 aに連結する連結手段 6と、 連結するピン 4から離れた位置 において第 1の背フレーム 1と第 2の背フレーム 5とを連結し第 1の背フレーム 1と第 2の背フレーム 5との間の距離間隔を変化させる変位手段 7とから屈曲角 度調整機構 3が構成されている。 Further, the backrest structure includes a bending angle adjusting mechanism 3 that changes the bending angle of the back plate 2 and fixes the bending angle by adjusting and fixing the tilt angle of the second back frame 5 with respect to the first back frame 1. Is provided. The bending angle adjusting mechanism 3 of the present embodiment utilizes a feed screw mechanism, and has a variable distance between the first back frame 1 and the second back frame 5. That is, the lower end of the second back frame 5 is connected to the rear end of the first back frame 1 by the pin 4, and is provided so as to be tiltable in the front-rear direction about the connection pin 4. This second back frame 5 , connecting means 6 for connecting the upper end of the second back frame 5 to the upper part 2a of the back plate, and a position away from the connecting pin 4 And a displacement means 7 for connecting the first back frame 1 and the second back frame 5 to change the distance between the first back frame 1 and the second back frame 5 in the first embodiment. 3 are configured.
第 1の背フレーム 1は、 座受け部材 8に傾動可能に取り付けられている。 第 1 の背フレーム 1には背板 2の背板下部 2 bが固定されている。 第 1の背フレーム 1は、 違結ピン 8 1によって座受け部材 8に対し揺動可能に取り付けられ、 座受 け部材 8に装備された反力ュニット 8 3によって背板 2を常時起立させるように 付勢力が付与されている。 座受け部材 8は、 先端側に長孔 8 5を有し、 該長孔 8 5にシャフト 8 4を貫通させて座 9を前後動可能に支持している。 座 9の後端側 は背支持部材 6 1を貫通するシャフト 8 2に引っ掛けられて背支持部材 6 1に支 持されている。 したがって、 座 9は、 背支持部材 6 1の傾動に伴って前後動する と共に、 後方側を沈めたり持ち上げたりする。  The first back frame 1 is attached to the seat receiving member 8 so as to be tiltable. The lower back 2b of the back plate 2 is fixed to the first back frame 1. The first back frame 1 is swingably attached to the seat receiving member 8 by a connecting pin 8 1 so that the back plate 2 is always erected by a reaction force unit 8 3 mounted on the seat receiving member 8. Has been biased. The seat receiving member 8 has a long hole 85 at the distal end side, and a shaft 84 is passed through the long hole 85 to support the seat 9 so as to be able to move back and forth. The rear end of the seat 9 is hooked on a shaft 82 penetrating the back support member 61 and is supported by the back support member 61. Therefore, the seat 9 moves back and forth with the tilt of the back support member 61, and sinks or lifts the rear side.
尚、 背板取付壁 1 f を利用して背板下部 2 bがねじ止めやビス止めなどによつ て固定されている。 また、 なお、 図中符号 1 gを付して示す部材は、 左右の第 1 の背フレーム 1を連結する連結部材である。  The lower part 2b of the back plate is fixed by screws or screws using the back plate mounting wall 1f. In addition, a member denoted by reference numeral 1 g in the figure is a connecting member that connects the left and right first back frames 1.
背板 2は、 例えば可撓性の材料で構成されている。 本実施形態では、 例えばポ リプロピレン、 ナイロン等の樹脂によって背板 2を成形している。 ただし、 背板 2の材料となる樹脂はこれらに限るものではなく、 また、 樹脂以外の材料によつ て背板 2を成形しても良い。 本実施形態では、 背板 2を可撓性のある材料例えば 樹脂などで構成することで屈曲可能にしていたが、 背板 2の背板上部 2 aと背板 下部 2 bを別部材にし、 ヒンジ等によつて背板上部 2 aと背板下部 2 bを接続す ることで背板 2を屈曲可能にしても良い。 この場合、 ヒンジが背板屈曲領域 2 e である。 なお、 ヒンジとしては、 例えば、 背板 2の背板上部 2 aや背板下部 2 b と一体成形され、 且つ背板上部 2 aや背板下部 2 bの材料となる樹脂よりも柔軟 性がある樹脂を使用して形成した樹脂ヒンジの適用が可能であり、 また、 背板 2 の背板上部 2 aや背板下部 2 bと一体成形され、 背板上部 2 aや背板下部 2 bよ りも肉厚を薄くすることで柔軟性を持たせたヒンジの適用が可能である。  The back plate 2 is made of, for example, a flexible material. In the present embodiment, the back plate 2 is formed of, for example, a resin such as polypropylene or nylon. However, the resin used as the material of the back plate 2 is not limited to these, and the back plate 2 may be formed of a material other than the resin. In the present embodiment, the back plate 2 is made to be bendable by being made of a flexible material such as resin, but the back plate upper portion 2a and the back plate lower portion 2b of the back plate 2 are formed as separate members. The back plate 2 may be bendable by connecting the back plate upper portion 2a and the back plate lower portion 2b with a hinge or the like. In this case, the hinge is the back plate bending area 2 e. The hinge is, for example, integrally formed with the upper back plate 2a and the lower back plate 2b of the back plate 2, and is more flexible than the resin used as the material of the upper back plate 2a and the lower back plate 2b. It is possible to apply a resin hinge formed by using a certain resin, and it is formed integrally with the back plate upper part 2a and the back plate lower part 2b of the back plate 2, and the back plate upper part 2a and the back plate lower part 2b It is possible to apply a hinge that has flexibility by making it thinner.
なお、 本実施形態の場合、 背板 2はその両側縁部が前方に向けて湾曲させられ ているが、 スリット 1 0を形成することで、 前後方向に屈曲し易い屈曲領域 2 e を形成するようにしている。 本実施形態では、 少なくとも一方向に突出する形状 のスリ ッ ト例えば U字形状のスリ ッ ト 1 0を採用しているが、 スリッ ト 1 0の形 状はこれに限るものではなく、 例えば上下が逆の U字形状や、 H字形状、 V字形 状ないし逆 V字形状、 W形状若しくはそれらに近似したスぺードのマークのよう な形状にしても良く、 あるいはその他の形状でも良い。 なお、 背板 2のスリッ ト 1 0の突出した部分、 本実施例では上側部分は、 舌片部 2 cとなっている。 また、 スリ ット 1 0の形状は、 図示の U字形に限られず、 直線形状にしても良 い。 この場合、 スリッ ト 1 0は少なくとも 1本存在すれば足り、 例えば Fig. 3 4 に示すように 2本のスリット 1◦を設けても良く、 または、 Fig. 3 5に示すよう に 1本のスリ ット 1 0を設けても良く、 さらには、 3本以上のスリ ッ ト 1 0を設 けても良い。 このように、 スリット 1 0を形成して変形しやすくなり、 屈曲領域 2 eよりも上の背板上部 2 a又は下の背板下部 2 bを屈曲領域 2 eを中心に前後 方向に傾動させることを可能にする。 ここで、 屈曲領域 2 eとは、 背板 2が第 1 の背フレーム 1に固定されている部位と第 2の背フレーム 5に連結されている部 位との間の領域である。 より具体的には、 屈曲領域 2 eとは、 スリ ッ ト 1 0ゃス リット 1 0と同様に機能するヒンジの近傍の領域であり、 概ね、 Fig. 3、 Fig. 3 3、 Fig. 3 4、 Fig. 3 5に仮想線で示される範囲において積極的に弾性変形する と推定される領域である。 尚、 この屈曲領域 2 eは、 任意の位置での背板 2の屈 曲を可能とするため意図的に形成されているが、 場合によっては結果的に屈曲変 形する領域も含まれる。 In the present embodiment, the back plate 2 has both side edges curved forward. However, by forming the slit 10, a bending region 2 e that is easily bent in the front-rear direction is formed. Is formed. In the present embodiment, a slit having a shape protruding at least in one direction, for example, a U-shaped slit 10 is employed, but the shape of the slit 10 is not limited to this, and for example, However, the shape may be an inverted U-shape, H-shape, V-shape or inverted V-shape, W-shape, or a shape similar to a pseudo-mark, or other shapes. The protruding portion of the slit 10 of the back plate 2, in this embodiment, the upper portion is a tongue piece 2c. Further, the shape of the slit 10 is not limited to the U-shape shown in the figure, and may be a linear shape. In this case, it is sufficient that at least one slit 10 exists, for example, two slits 1 ° may be provided as shown in Fig. 34, or one slit 10 as shown in Fig. 35. A slit 10 may be provided, and three or more slits 10 may be provided. In this manner, the slit 10 is formed to be easily deformed, and the upper part 2a of the backboard above the bending area 2e or the lower part 2b of the lower backboard is tilted in the front-back direction about the bending area 2e. Make it possible. Here, the bending region 2 e is a region between a portion where the back plate 2 is fixed to the first back frame 1 and a portion where the back plate 2 is connected to the second back frame 5. More specifically, the bending region 2 e is a region near the hinge that functions similarly to the slit 10 ゃ slit 10, and is generally represented by Figs. 3, 33, and 3. 4. In the range indicated by the imaginary line in Fig. 35, it is the area where positive elastic deformation is presumed. The bent region 2e is intentionally formed to allow the back plate 2 to bend at an arbitrary position, but may include a region which is bent as a result in some cases.
なお、 Fig. 3等に示すように、 スリ ッ ト 1 0の形状を U字形状にして舌片部 2 cを形成した場合、 即ち下向きに舌片部 2 cを突出させた場合には背板 2の上部 を後方へ傾けて屈曲させたときに舌片部 2 cを前方へ突出させることができ、 突 出させた舌片部 2 cで着座者の腰部等をサポートすることができる。 また、 舌片 部 2 cを突出させる必要がない場合や舌片部 2 cを突出させることが好ましくな い場合には、 スリッ ト 1 0の形状を直線形状にしたり、 屈曲領域 2 eを連続的な 樹脂ヒンジで構成する。 即ち、 スリ ッ ト 1 0の形状を直線形状にすることで、 背 板 2を屈曲させても背板 2の一部が突出することを防止することができる。 第 2の背フレーム 5は、 屈曲領域 2 eを境界に第 1の背フレーム 1に固定され ている側とは反対側の背板部分、 即ち本実施形態の場合には屈曲領域 2 eよりも 上方の背板上部 2 aで背板 2に回転かつ摺動自在に連結され、 背板上部 2 aを支 持するものである。 本実施形態の場合、 第 2の背フレーム 5は、 例えば円形パイ プが採用され、 背板 2の幅方向 （水平方向） の両端を支持するように、 例えば左 右に 2本設けられている。 第 2の背フレーム 5は 2枚の接続板 1 1， 1 2によつ て連結されている。 下側の接続板 1 2の下端には、 第 1の背フレーム 1を両側か ら挟むように配置される一対のブラケット 1 2 aが固着されている。 各ブラケッ ト 1 2 aと第 1の背フレーム 1に、 連結シャフト （以下、 単にシャフト 4とい う） を貫通させることで、 接続板 1 2即ち第 2の背フレーム 5の下端は第 1の背 フレーム 1に対してシャフト 4を中心に回転自在に連結され、 上端を前後方向に 摇動させることができる。 第 2の背フレーム 5は 2本のパイプを接続板 1 1 , 1 2で連結してほぼ Y形に形成されており、 接続板 1 1よりも上のアーム部分が、 それらの間の間隔が広げられて上端が背板 2の上側の角部近傍に連結手段 6によ つて連結されている。 なお、 第 2の背フレーム 5の本数は 2本に限るものではな く、 1本でも良く、 又は 3本以上であっても良い。 例えば 1本の第 2の背フレー ム 5の場合、 背板 2の中央を支えるようにしても良いし、 T形にして背板 2の両 端を支持するようにしても良い。 尚、 左右のパイプ製第 2背フレーム 5は、 2枚 の接続板 1 1， 1 2によって連結されているが、 場合によっては 1枚の接続板で 第 2の背フレーム 5として少なくとも剛性が必要な範囲を連結するようにしても 良い。 また、 第 2の背フレーム 5は円形パイプ材によって構成されているが、 無 垢の棒材でも、 場合によっては角パイプゃ角材等であっても良い。 As shown in Fig. 3 etc., when the shape of the slit 10 is U-shaped and the tongue piece 2c is formed, that is, when the tongue piece 2c is projected downward, When the upper part of the plate 2 is inclined backward and bent, the tongue piece 2c can be projected forward, and the protruded tongue piece 2c can support the waist of the occupant. When it is not necessary to protrude the tongue piece 2c or when it is not preferable to protrude the tongue piece 2c, the shape of the slit 10 may be linear, or the bent area 2e may be continuous. It is composed of typical resin hinges. That is, by making the shape of the slit 10 linear, it is possible to prevent a part of the back plate 2 from projecting even if the back plate 2 is bent. The second back frame 5 is fixed to the first back frame 1 with the bending area 2 e as a boundary. In the case of the present embodiment, the back plate portion 2a above the bending region 2e is rotatably and slidably connected to the back plate 2 at the back plate portion opposite to the side of the back plate. It supports 2a. In the case of the present embodiment, for example, a circular pipe is employed as the second back frame 5, and two second back frames 5 are provided on the left and right sides, for example, so as to support both ends in the width direction (horizontal direction) of the back plate 2. . The second back frame 5 is connected by two connecting plates 11 and 12. At a lower end of the lower connection plate 12, a pair of brackets 12 a arranged to sandwich the first back frame 1 from both sides are fixed. By connecting a connecting shaft (hereinafter simply referred to as shaft 4) to each bracket 12 a and the first back frame 1, the lower end of the connection plate 12, that is, the second back frame 5 is attached to the first back frame 1. It is rotatably connected to the frame 1 around the shaft 4, and the upper end can be moved in the front-rear direction. The second back frame 5 is formed in a substantially Y-shape by connecting the two pipes with the connecting plates 11 1 and 12, and the arm portion above the connecting plate 11 has a gap between them. It is spread and the upper end is connected to the vicinity of the upper corner of the back plate 2 by connecting means 6. The number of the second back frames 5 is not limited to two, but may be one or three or more. For example, in the case of one second back frame 5, the center of the back plate 2 may be supported, or a T-shape may be used to support both ends of the back plate 2. The left and right pipe second back frames 5 are connected by two connecting plates 11 and 12. However, in some cases, one connecting plate requires at least rigidity as the second back frame 5. May be connected. Further, the second back frame 5 is formed of a circular pipe material, but may be a solid rod material or, in some cases, a square pipe or a square material.
連結手段 6は、 例えば Fig. 5に示すように、 第 2の背フレーム 5の少なくとも 上端に形成された円形の輪郭を有する軸部 1 3と、 該軸部 1 3に相対回転自在且 つ軸方向に摺動自在な連結部 1 4と、 連結部 1 4を背板 2に対し水平軸周りに回 転自在に取りつける軸支手段 1 5を備えている。 本実施形態では、 第 2の背フレ ーム 5は横断面形状が円形のパイプであるので、 第 2の背フレーム 5の上端部が 軸部 1 3を構成している。 また、 連結部 1 4は、 軸部 1 3に若干の隙間をあけて 嵌め込まれる円形の内周面を有するキャップ （以下、 キャップ 1 4という） であ る。 ただし、 連結部 1 4としてはキャップに限るものではなく、 例えばリング等 であっても良い。 また、 軸部 1 3の外周面形状並びに連結部 1 4の内周面形状は 厳密な意味での円形である必要はなく、 これらの間で必要とされる可動範囲にお いて回転を許容できる形状であれば足りる。 For example, as shown in FIG. 5, the connecting means 6 includes a shaft 13 having a circular contour formed at least at the upper end of the second back frame 5, and a shaft rotatable relative to the shaft 13. A connecting part 14 slidable in the direction is provided, and a shaft support means 15 for rotatably attaching the connecting part 14 to the back plate 2 around a horizontal axis. In the present embodiment, since the second back frame 5 is a pipe having a circular cross section, the upper end of the second back frame 5 forms the shaft portion 13. The connecting portion 14 is a cap (hereinafter, referred to as a cap 14) having a circular inner peripheral surface that is fitted into the shaft portion 13 with a slight gap. However, the connecting portion 14 is not limited to the cap, and may be, for example, a ring or the like. It may be. In addition, the outer peripheral shape of the shaft portion 13 and the inner peripheral surface shape of the connecting portion 14 do not have to be circular in a strict sense, and rotation can be allowed in a movable range required between them. Any shape is sufficient.
軸支手段 1 5は、 キャップ 1 4に固着されたブラケット 1 4 aと、 背板 2に固 着されているブラケット 2 dと、 これらブラケット 2 d、 1 4 aを貫通して回転 自在に連結する軸 1 6より構成されるヒンジ継手である。  The shaft support means 15 is rotatably connected to a bracket 14a fixed to the cap 14 and a bracket 2d fixed to the back plate 2 through these brackets 2d and 14a. This is a hinge joint composed of a shaft 16 to be mounted.
キャップ 1 4は軸部 1 3に上から嵌め込まれている。 キャップ 1 4の内径を軸 部 1 3の外径よりも僅かに大きくすることで、 軸部 1 3に対して回転自在且つ軸 方向に摺動自在になっている。 キャップ 1 4は第 2の背フレーム 5の動きの範囲 内で軸部 1 3から脱落しない程度の長さを有している。 即ち、 第 2の背フレーム 5の傾動と背板 2の屈曲によってキャップ 1 4が軸部 1 3に対して摺動しても、 キャップ 1 4が軸部 1 3から外れることはなレ、。  The cap 14 is fitted into the shaft 13 from above. By making the inner diameter of the cap 14 slightly larger than the outer diameter of the shaft 13, the cap 14 is rotatable with respect to the shaft 13 and slidable in the axial direction. The cap 14 has such a length that it does not fall off the shaft portion 13 within the range of movement of the second back frame 5. That is, even if the cap 14 slides with respect to the shaft portion 13 due to the tilting of the second back frame 5 and the bending of the back plate 2, the cap 14 does not come off from the shaft portion 13.
変位手段 7は、 本実施形態の場合、 第 1の背フレーム 1と第 2の背フレーム 5 のいずれか一方に設けられた調整ねじ 1 7と、 他方に設けられる雌ねじ部材 2 1 とから構成されている。 雌ねじ部材 2 1は、 棒状を成し、 その径方向に貫通する 調整ねじ 1 7が螺合されるねじ孔 1 8を有し、 調整ねじ 1 7と直交するように配 置されている。 雌ねじ部材 2 1と調整ねじ 1 7は、 それぞれ第 1の背フレーム 1 並びに第 2の背フレーム 5に対して角度調整可能に取り付けられている。 尚、 本 実施形態では、 第 2の背フレーム 5を連結する接続板 1 2に調整ねじ 1 7を取り 付け、 第 1の背フレーム 1に雌ねじ部材 2 1が設けられている。  In the case of the present embodiment, the displacement means 7 includes an adjusting screw 17 provided on one of the first back frame 1 and the second back frame 5, and a female screw member 21 provided on the other. ing. The female screw member 21 has a rod shape, has a screw hole 18 into which an adjusting screw 17 penetrating in the radial direction is screwed, and is disposed so as to be orthogonal to the adjusting screw 17. The female screw member 21 and the adjusting screw 17 are attached to the first back frame 1 and the second back frame 5 so as to be adjustable in angle. In the present embodiment, an adjusting screw 17 is attached to the connection plate 12 that connects the second back frame 5, and a female screw member 21 is provided on the first back frame 1.
より詳細に説明すると、 調整ねじ 1 7はスラストベアリング 2 0を介して当該 調整ねじ 1 7よりも僅かに大径あるいは長孔 （背凭れの高さ方向に長い） の接続 板 1 2にあけられた穴 （図示省略） に通すことによって、 接続板 1 2に対し回転 自在でかつ傾き並びに位置が調整可能に且つ脱落不能に取り付けられている。 ま た、 雌ねじ部材 2 1は、 第 1の背フレーム 1の背板取付壁 1 f から突出する側板 I d , 1 dの間に配置されてその両端を第 1の背フレーム 1の側板 1 d， I dを 貫通する同一軸上のねじ 2 2， 2 2に螺合されて支持されている。 ねじ 2 2は、 第 1の背フレーム 1の側板 1 dに形成された通孔 1 eを貫通して雌ねじ部材 2 1 の両端に形成されたねじ孔にねじ込まれている。 したがって、 雌ねじ部材 2 1は、 ねじ 2 2と側板 1 dとによって回転自在に支持される角度変化手段 1 9によって ねじ 2 2を中心に回転可能に第 1の背フレーム 1に支持されている。 More specifically, the adjusting screw 17 is opened to the connection plate 12 having a slightly larger diameter or a longer hole (longer in the height direction of the backrest) than the adjusting screw 17 via the thrust bearing 20. It is attached to the connecting plate 12 so as to be rotatable, tiltable and adjustable in position, and not fall off by passing through a hole (not shown). Further, the female screw member 21 is disposed between the side plates I d and 1 d protruding from the back plate mounting wall 1 f of the first back frame 1, and both ends thereof are connected to the side plates 1 d of the first back frame 1. , Id and are screwed and supported on coaxial screws 22 and 22. The screws 22 pass through through holes 1 e formed in the side plate 1 d of the first back frame 1 and are screwed into screw holes formed at both ends of the female screw member 21. Therefore, the female screw member 21 is The first back frame 1 is rotatably supported on the screw 22 by angle changing means 19 rotatably supported by the screw 22 and the side plate 1d.
ねじ孔 1 8は、 雌ねじ部材棒 2 1の中央を径方向に貫通している。 ねじ孔 1 8 にねじ込まれた調整ねじ 1 7の先端には止め円板 2 3が取り付けられており、 調 整ねじ 1 7がねじ孔 1 8から抜けないようになつている。 尚、 調整ねじ 1 7の端 部には操作用のダリップ 4 3が固定され、 該グリップ 4 3を用いて該調整ねじ 1 7を回転させるように設けられている。  The screw hole 18 penetrates the center of the female screw member rod 21 in the radial direction. At the tip of the adjusting screw 17 screwed into the screw hole 18, a stop disk 23 is attached so that the adjusting screw 17 does not come out of the screw hole 18. An operating lip 43 is fixed to an end of the adjusting screw 17, and is provided so as to rotate the adjusting screw 17 using the grip 43.
この背凭れ構造では、 以下の通り、 背板 2の屈曲角度を好みの角度に調整する ことができる。  In this backrest structure, the bending angle of the back plate 2 can be adjusted to a desired angle as described below.
Fig. 1及ぴ Fig. 6に示す状態において、 調整ねじ 1 7を回転させて第 1の背フ レーム 1と第 2の背フレーム 5との間隔を広げると、 第 2の背フレーム 5はシャ フト 4を中心に後方に向けて倒れる。 このとき、 第 1の背フレーム 1に固定され ている背板下部 2 bに対し、 第 2の背フレーム 5の上端が背板 2の背板上部 2 a を後方に引っ張るので、 背板 2を屈曲領域 2 eで弾性変形させて屈曲させる （Fi g. 2 , Fig. 7 ) 。  In the state shown in Fig. 1 and Fig. 6, if the distance between the first back frame 1 and the second back frame 5 is increased by turning the adjusting screw 17, the second back frame 5 It falls backwards centering on ft4. At this time, the upper end of the second back frame 5 pulls the upper back plate 2a of the back plate 2 backward against the lower back plate 2b fixed to the first back frame 1, so that the back plate 2 is It bends by elastic deformation in the bending area 2e (Fig. 2, Fig. 7).
調整ねじ 1 7の回転操作を止めると、 第 1の背フレーム 1と第 2の背フレーム 5の間隔は変化しなくなるので、 第 2の背フレーム 5の傾動角度は一定に維持さ れ、 したがって、 背板 2の屈曲角度を一定に維持することができ、 この状態で椅 子を使用することができる。  When the rotation operation of the adjusting screw 17 is stopped, the interval between the first back frame 1 and the second back frame 5 does not change, so that the tilt angle of the second back frame 5 is kept constant, and therefore, The bending angle of the back plate 2 can be kept constant, and the chair can be used in this state.
また、 調整ねじ 1 7を上述の操作と反対側に回転させると、 第 1の背フレーム 1と第 2の背フレーム 5との間隔が狭くなり、 第 2の背フレーム 5がシャフト 4 を中心に前方に向けて回転して背板 2を起こす。 これにより、 第 2の背フレーム 5による背板 2の方向への引っ張り力が減少するので、 背板 2の屈曲角度が減少 する。 即ち、 Fig. 1及び Fig. 6に示すように、 背板 2の屈曲角度を元に戻すこと ができる。  When the adjustment screw 17 is rotated in the opposite direction to the above operation, the distance between the first back frame 1 and the second back frame 5 is reduced, and the second back frame 5 is moved around the shaft 4. Rotate forward to raise backboard 2. As a result, the pulling force of the second back frame 5 in the direction of the back plate 2 is reduced, and the bending angle of the back plate 2 is reduced. That is, as shown in FIGS. 1 and 6, the bending angle of the back plate 2 can be returned to the original.
このように、 第 1の背フレーム 1に対する第 2の背フレーム 5の傾動角度を調 整することで、 背板 2の屈曲角度を変化させ、 且つ屈曲角度を固定することがで きる。 ここで、 第 1の背フレーム 1に対して第 2の背フレーム 5を大きく傾動さ せると背板 2を大きく屈曲させることができ、 第 1の背フレーム 1に対して第 2 の背フレーム 5を小さく傾動させると背板 2を小さく屈曲させることができる。 即ち、 背板 2の屈曲角度を調整することができる。 As described above, by adjusting the tilt angle of the second back frame 5 with respect to the first back frame 1, the bending angle of the back plate 2 can be changed and the bending angle can be fixed. Here, when the second back frame 5 is largely tilted with respect to the first back frame 1, the back plate 2 can be greatly bent, and the second By tilting the back frame 5 slightly, the back plate 2 can be bent slightly. That is, the bending angle of the back plate 2 can be adjusted.
本発明の背凭れ構造では、 着座者が背板 2に寄り掛かり、 背板 2を座受け部材 8に対して傾動させた場合、 即ちリクライニング時でも、 調整ねじ 1 7を回転さ せるような力は発生しないので、 使用中に背板 2の屈曲角度が変化してしまうこ とはない。  According to the backrest structure of the present invention, when the occupant leans against the backboard 2 and tilts the backboard 2 with respect to the seat receiving member 8, that is, a force for rotating the adjustment screw 17 even during reclining. Since the bending does not occur, the bending angle of the back plate 2 does not change during use.
つまり、 着座者は調整ねじ 1 7の操作によって背板 2の屈曲角度を好みの角度 に調整することができ、 背板 2を好みの角度に屈曲させた状態で椅子を使用する ことができる。 この結果、 椅子の使い勝手を良くすることができる。 また、 調整 ねじ 1 7を回転させることは容易であり、 調整作業も簡単である。 このことから も、 椅子の使い勝手を良くすることができる。  That is, the occupant can adjust the bending angle of the backboard 2 to a desired angle by operating the adjustment screw 17, and can use the chair with the backboard 2 bent at the desired angle. As a result, the usability of the chair can be improved. Further, it is easy to rotate the adjusting screw 17 and the adjusting work is also simple. This also improves the usability of the chair.
背板 2の屈曲角度を大きくした状態で椅子を使用することで、 例えば第 1の背 フレーム 1を傾動させて背凭れ全体をリクライニングさせた際、 背筋をより伸ば すことができ、 背のストレッチ効果をより良好に得ることができる。  By using the chair with the bending angle of the backboard 2 increased, for example, when the first back frame 1 is tilted and the entire backrest is reclined, the back muscles can be further extended, A better stretching effect can be obtained.
なお、 座受け部材 8の後端と第 1の背フレーム 1の途中を連結するロック機構 付きガススプリング 2 4を伸縮させることで、 第 1の背フレーム 1を座受け部材 8に対して傾動することが可能になる。 即ち、 伸縮動作を任意位置で拘束可能な ロック機構付きガススプリング 2 4は、 座受け部材 8及び第 1の背フレーム 1と 共に三角形状のリンク機構を構成しており、 ガススプリング 2 4のロック機構を 解除して伸縮可能な場合には第 1の背フレーム 1は傾動可能であるが、 ロック機 構、 例えば作動ガスの流動を阻止する口ック機構を作動させることによってガス スプリング 2 4の長さを固定した場合には第 1の背フレーム 1を傾動させること ができなくなる。 ガススプリング 2 4の長さ固定やその解除は、 レバー 2 5の操 作によって作動ガスの流動を阻止するリリースバルブを開閉させることによって 行われる。 このレバー 2 5は背板 2の側縁の下方空間に配置されており、 着座者 が前方にかがむことがなく、 背中を背板 2に着けたままの状態で手を下ろすだけ で掴むことができ、 そのまま操作することができる。 このため、 レバー操作を行 いやすく、 しかもレバー 2 5を操作しながら背中で背板 2を押す動作を行いやす くなる。 また、 ガススプリング 2 4のバルブ操作部から椅子の左右方向にリンク 2 6を伸ばせば当該リンク 2 6に直接レバー 2 5を取り付けることができ、 合理 的な配置を採用することができる。 即ち、 ガススプリング 2 4やリンク 2 6ゃレ パー 2 5等を予め組み付けてュニット化した状態で、 椅子に組み付けることが可 能になり、 椅子の組み付け作業を容易にすることができる。 The first back frame 1 is tilted with respect to the seat receiving member 8 by expanding and contracting a gas spring 24 with a lock mechanism that connects the rear end of the seat receiving member 8 and the middle of the first back frame 1. It becomes possible. That is, the gas spring 24 with the lock mechanism capable of restricting the expansion and contraction operation at an arbitrary position constitutes a triangular link mechanism together with the seat receiving member 8 and the first back frame 1 and locks the gas spring 24. When the mechanism can be released and extended, the first back frame 1 can be tilted, but the locking mechanism, for example, the locking mechanism that prevents the flow of the working gas, activates the gas spring 24. If the length is fixed, the first back frame 1 cannot be tilted. The length of the gas spring 24 is fixed or released by opening and closing a release valve that prevents the flow of the working gas by operating the lever 25. This lever 25 is located in the space below the side edge of the backboard 2 so that the occupant does not bend forward, and can be grasped simply by lowering his hand with his back on the backboard 2. It can be operated as it is. Therefore, it is easy to perform the lever operation, and it is also easy to perform the operation of pushing the back plate 2 with the back while operating the lever 25. Also, the gas spring 24 is linked from the valve operation part to the left and right direction of the chair. By extending 26, the lever 25 can be directly attached to the link 26, and a reasonable arrangement can be adopted. In other words, the gas spring 24, the link 26, the wrapper 25, and the like can be assembled to the chair in a previously assembled state, and the chair can be easily assembled.
第 2の背フレーム 5の傾き角度が変化すると、 これに伴って調整ねじ 1 7の高 さ並びに傾きが変化するので、 雌ねじ部材 2 1と調整ねじ 1 7の交差角度が変化 するが、 調整ねじ 1 7の接続板 1 2に対する微調整手段と角度変化手段 1 9によ る雌ねじ部材 2 1の回転によって、 調整ねじ 1 7とねじ孔 1 8が常に一直線上に 配置され、 調整ねじ 1 7を常にスムーズに回転させることができる。 このため、 調整ねじ 1 7を軽い力で操作することができ、 使い勝手に優れている。  When the inclination angle of the second back frame 5 changes, the height and inclination of the adjusting screw 17 change accordingly, so that the intersection angle between the female screw member 21 and the adjusting screw 17 changes, but the adjusting screw By rotating the female screw member 21 by the fine adjustment means and the angle changing means 19 with respect to the connection plate 12 of 17, the adjustment screw 17 and the screw hole 18 are always arranged in a straight line, and the adjustment screw 17 is It can always rotate smoothly. For this reason, the adjusting screw 17 can be operated with a light force, and is excellent in usability.
第 2の背フレーム 5を傾動させて背板 2の屈曲角度を調整する際、 第 2の背フ レーム 5の上端の移動量と背板 2の第 2の背フレーム 5を連結している部分、 即 ちリンク連結部分の移動量が相違するため、 第 2の背フレーム 5の上端と背板 2 のリンク連結部分との間に相対変位が生じる。 しかし、 この相対変位は連結手段 6によって吸収される。 即ち、 第 2の背フレーム 5の軸方向の相対変位は、 軸部 1 3に対してキャップ 1 4が軸方向に摺動することで吸収することができる。 ま た、 第 2の背フレーム 5と背板 2の上下方向の角度変化は、 軸支手段 1 5の支軸 1 6を中心に背板 2とキャップ 1 4の相対角度を変化させることで吸収すること ができる。 さらに、 第 2の背フレーム 5と背板 2の水平方向の角度変化は、 軸部 1 3に対してキャップ 1 4が回転することで吸収することができる。  When adjusting the bending angle of the back plate 2 by tilting the second back frame 5, a portion connecting the movement amount of the upper end of the second back frame 5 and the second back frame 5 of the back plate 2. That is, since the movement amount of the link connecting portion is different, a relative displacement occurs between the upper end of the second back frame 5 and the link connecting portion of the back plate 2. However, this relative displacement is absorbed by the connecting means 6. That is, the relative displacement of the second back frame 5 in the axial direction can be absorbed by sliding the cap 14 in the axial direction with respect to the shaft portion 13. The change in the vertical angle between the second back frame 5 and the back plate 2 is absorbed by changing the relative angle between the back plate 2 and the cap 14 around the support shaft 16 of the shaft support means 15. can do. Further, a change in the horizontal angle between the second back frame 5 and the back plate 2 can be absorbed by the rotation of the cap 14 with respect to the shaft portion 13.
このように、 第 2の背フレーム 5の上端と背板 2のリンク連結部分との間に発 生する相対変位を連結手段 6によって吸収することができるので、 第 2の背フレ ーム 5を傾動させて背板 2を屈曲させる機構を成立させることができる。 また、 第 2の背フレーム 5と背板 2の連結部分に無理な力が作用することもないので、 スムーズに動かすことができ、 軽い力で背板 2を屈曲させることができ、 使い勝 手や使い心地が良くなる。 さらに、 第 2の背フレーム 5と背板 2の連結部分に無 理な力が作用するのを防止できるので、 応力集中による部材、 部品の破損や摩耗 を防いで、 製品寿命を長くすることができる。 また、 各部材 ·部品の材料の選択 の自由度や、 摺動 ·接触する部材 ·部品間での材料の組合せの自由度を向上させ ることができる。 In this manner, the relative displacement generated between the upper end of the second back frame 5 and the link connecting portion of the back plate 2 can be absorbed by the connecting means 6, so that the second back frame 5 is A mechanism for bending the back plate 2 by tilting can be established. Also, since no excessive force acts on the connection between the second back frame 5 and the back plate 2, the back plate 2 can be moved smoothly, and the back plate 2 can be bent with a light force. And the feel is better. Furthermore, since an excessive force is prevented from acting on the connecting portion between the second back frame 5 and the back plate 2, it is possible to prevent damage and wear of members and components due to stress concentration, and to prolong the product life. it can. In addition, the degree of freedom in the selection of materials for each member and part, and the degree of freedom in the combination of materials between sliding and contacting parts and parts are improved. Can be
また、 可撓性材料で構成されている本実施形態の背板 2は、 軸部 1 3に対して キャップ 1 4が回転することで、 上から見て、 Fig. 4 1に示すように、 背板 2の 中央を後方に突出させるように背板 2を湾曲させることが容易になる。 即ち、 着 座者が背板 2に寄り掛かると、 背中の形状にあわせて背板 2を湾曲させやすくな る。 このため、 座り心地を更に良くすることができる。  In addition, the back plate 2 of the present embodiment made of a flexible material has a structure in which the cap 14 rotates with respect to the shaft portion 13 so that, as viewed from above, as shown in FIG. It becomes easy to curve the back plate 2 so that the center of the back plate 2 projects rearward. That is, when the occupant leans on the back plate 2, the back plate 2 is easily curved in accordance with the shape of the back. Therefore, the sitting comfort can be further improved.
なお、 Fig. l〜Fig. 3 , Fig. 6， Fig. 7には図示を省略しているが、 背板 2の 前面には袋状のカバー 2 8に収納されているクッション材 2 7が取り付けられて いる。 カバー 2 8は、 図 1 1に示すように、 裏面の上端縁にポケット状の折返し 部 2 8 aが、 また背板 2のスリット 1 0に対向する位置には、 上方に開口するポ ケット部 2 8 bがそれぞれ設けられている。 尚、 ポケット部 2 8 bの形状は、 ス リット 1 0及び舌片部 2 cの形状に対応する様な形状となっている。 折返し部 2 8 a内には、 弾性変形可能な中敷きプレート 2 9が入れられており、 カバー 2 8 の上端縁の形状を整えると共に、 折返し部 2 8 aがしわになつたり折れ曲がるの を防止して折返し部 2 8 aをめくりやすくしている。  Although not shown in Figs. L to 3, 6, and 7, the cushioning material 27 stored in the bag-like cover 28 is provided on the front of the back plate 2. Installed. As shown in Fig. 11, the cover 28 has a pocket-shaped folded portion 28a at the upper edge of the back surface and a pocket portion opening upward at a position facing the slit 10 of the back plate 2. 28 b are provided respectively. Incidentally, the shape of the pocket portion 28b is a shape corresponding to the shape of the slit 10 and the tongue piece portion 2c. An elastically deformable insole plate 29 is placed in the folded portion 28a to adjust the shape of the upper edge of the cover 28 and to prevent the folded portion 28a from wrinkling or bending. To make it easy to turn over the folded part 28a.
力パー 2 8で覆われたクッシヨン材 2 7を背板 2に取り付けるには、 まずカバ 一 2 8のボケット部 2 8 bを背板 2のスリット 1 0に通して背板 2の舌片部 2 c に下から被せた後、 上方の折返し部 2 8 aをめくりながら背板 2の上端縁に被せ れば良い。 このとき、 カバー 2 8はポケット部 2 8 bを背板 2の舌片部 2 cに引 つ掛けるように被せてから上に引っ張るように広げながら上端の折返し部 2 8 a を背板 2の上端部に被せることによって取り付けることができる。 また、 力パー 2 8の折返し部 2 8 aを背板 2の上端縁に被せ、 ボケット部 2 8 bを舌片部 2 c に被せているので、 カバー 2 8が背板 2に対して左右方向にずれることもない。 このように、 カバー 2 8の折返し部 2 8 aを上から被せ、 ポケット部 2 8 bを スリット 1 0に通して下から被せるだけで、 クッション材 2 7を背板 2に取り付 けることができるので、 取付作業が大変簡単である。 しかも、 上下方向にも左右 方向にも正確な位置にクッション材 2 7を取り付けることができる。  To attach the cushioning material 27 covered with the force par 28 to the back plate 2, first, pass the cover 28 to the tongue piece of the back plate 2 through the slit 10 of the back plate 2. After covering over 2c from below, it is sufficient to cover the upper edge of the back plate 2 while turning over the upper folded portion 28a. At this time, cover 28 covers pocket 28b on tongue 2c of backboard 2 so that it can be hooked, and then extends upward while pulling back folded part 28a of backboard 2. It can be attached by putting it on the upper end. Also, since the folded part 28a of the force par 28 is placed on the upper edge of the back plate 2 and the bocket 28b is placed on the tongue piece 2c, the cover 28 is left and right with respect to the back plate 2. There is no deviation in the direction. In this way, the cushioning material 27 can be attached to the back plate 2 simply by covering the folded portion 28a of the cover 28 from above and covering the pocket portion 28b from the bottom through the slit 10. Installation work is very easy. In addition, the cushion material 27 can be attached at an accurate position both vertically and horizontally.
即ち、 従来の方法では、 クッション材 2 7を収納するカバー 2 8を背板 2に取 り付ける場合、 カバー 2 8を背板 2にピンによって止めていたり、 面ファスナ (所謂マジックテープ） によって止めていた。 また、 カバー 2 8の上端縁に折返 し部 2 8 aを設けて背板 2の上端縁に被せる例はあったが、 この場合でもカバー 2 8の下部はピンや面ファスナを使用して背板 2に止めていた。 したがって、 従 来の方法では、 クッション材 2 7を収納した力パー 2 8を背板 2に取り付けるの に手間が掛かっており、 作業性に劣っていた。 これらに対し、 本実施形態のカバ 一取付法によると、 ピンや面ファスナを使用して止めるという煩わしい作業をす る必要がなく、 また、 ピンや面ファスナを位置決めしたり、 カバー 2 8自体を背 板に位置決めするような作業を行う必要もないので、 作業性に大変優れており、 製造コストを下げることができる。 That is, in the conventional method, when the cover 28 for storing the cushioning material 27 is attached to the back plate 2, the cover 28 is fixed to the back plate 2 with a pin or a hook-and-loop fastener. (The so-called magic tape). In some cases, a folded part 28 a was provided on the upper edge of the cover 28 to cover the upper edge of the back plate 2, but even in this case, the lower part of the cover 28 was pinched using pins or hook-and-loop fasteners. It was stopped on board 2. Therefore, in the conventional method, it was troublesome to attach the force par 28 containing the cushioning material 27 to the back plate 2, and the workability was poor. On the other hand, according to the cover-mounting method of the present embodiment, there is no need to perform a troublesome work of stopping using pins or hook-and-loop fasteners. Since there is no need to perform work such as positioning on the back plate, workability is extremely excellent, and manufacturing costs can be reduced.
また、 椅子の後方から力パー 2 8の折返し部 2 8 aとポケット部 2 8 bが見え るので、 背板 2の色とカバー 2 8の色を相違させておくことで、 折返し部 2 8 a とボケット部 2 8 bがデザィン上のヮンポィントとなり、 従来にないデザィンに することができ、 他の種類の椅子との差別化を図ることができる。  Also, since the folded part 28 a and the pocket part 28 b of the force par 28 can be seen from the back of the chair, the color of the back plate 2 and the color of the cover 28 can be different so that the folded part 28 The a and the boket part 28b become components on the design, making it a design that has never existed before, and can be differentiated from other types of chairs.
また、 カバー 2 8を背板 2に取りつけた状態で、 ボケット部 2 8 bを携帯電話 等の小物類を入れておくことのできるポケットとして使用することもできる。 なお、 上述の形態は本発明の好適な形態の一例ではあるがこれに限定されるも のではなく本発明の要旨を逸脱しない範囲において種々変形実施可能である。 例えば、 Fig. l〜Fig. 1 2の実施形態において、 背板 2があらゆる方向に変形 可能な素材または構造とし、 かつ第 2の背フレーム 5を可撓性を有する構造物と して形成しても良い。 具体的には、 背板 2は、 前述の実施形態と同様にポリプロ ピレン、 ナイロン等の樹脂製である。 また、 第 2の背フレーム 5は、 少なくとも 背板 2に連結される部分が可撓性を有する樹脂によつて形成されている。 ここで、 第 2の背フレーム 5を形成する榭脂としては、 ガラス繊維やカーボン繊維などの 強化材が充填されたものが好ましいが、 着座者の姿勢に追従して背板 2を良好に 変形させることができ且つ背凭れ構造を構成するうえで必要な剛性は有している ものであれば特に限定されるものではない。 本実施形態では、 例えばガラス入り のナイロンが使用される。 また、 第 2の背フレーム 5の全ての部分を同じ剛性に する必要はなく、 部分的に剛性を変えても良い。 例えば第 2の背フレーム 5の接 続板 1 1で連結されている部分よりもこのアーム部分の剛性を下部の剛性に比べ て小さくしても良い。 剛性を変える手段としては、 例えばナイロンに入れるガラ スの充填量を上側と下側とで異ならせたり、 場合によっては、 上半部をガラス繊 維入りナイロンで、 下半部を金属製とし接合することが考えられる。 このように、 背板 2を変形可能にし、 かつ少なくとも背板 2に連結される部分例えば第 2の背 フレーム 5を可撓性を有する樹脂によって形成した場合、 着座者の姿勢や動きに 追従して背板 2が変形しやすくなり、 凭れ心地を向上させることができる。 Further, with the cover 28 attached to the back plate 2, the pocket 28b can be used as a pocket for storing small items such as a mobile phone. The above-described embodiment is an example of a preferred embodiment of the present invention, but is not limited thereto, and various modifications can be made without departing from the gist of the present invention. For example, in the embodiment of FIGS. L to 12, the back plate 2 is formed of a material or a structure that can be deformed in any direction, and the second back frame 5 is formed as a flexible structure. May be. Specifically, the back plate 2 is made of a resin such as polypropylene or nylon similarly to the above-described embodiment. Further, at least a portion of the second back frame 5 connected to the back plate 2 is formed of a flexible resin. Here, the resin forming the second back frame 5 is preferably a resin filled with a reinforcing material such as glass fiber or carbon fiber, but the back plate 2 is satisfactorily deformed according to the posture of the occupant. There is no particular limitation as long as it has the required rigidity to form the backrest structure. In the present embodiment, for example, nylon containing glass is used. Further, it is not necessary to make all the portions of the second back frame 5 have the same rigidity, and the rigidity may be partially changed. For example, the rigidity of this arm portion is lower than the rigidity of the lower portion than the portion connected by the connection plate 11 of the second back frame 5. May be smaller. As a means of changing the rigidity, for example, the filling amount of glass in nylon is made different between the upper side and the lower side, and in some cases, the upper half is made of nylon with glass fiber and the lower half is made of metal and joined It is possible to do. In this manner, when the back plate 2 is made deformable and at least a portion connected to the back plate 2, for example, the second back frame 5 is formed of a flexible resin, the back plate 2 follows the posture and movement of the seated person. As a result, the back plate 2 is easily deformed, so that the leaning comfort can be improved.
例えば、 着座者が背板 2の片側 （背板 2の中心線 5 9から外れた位置） に寄り 掛かった場合には、 第 2の背フレーム 5の接続板 1 1による連結箇所より上方で 分岐している 2本のアーム部のうち、 着座者の体重がより強く作用した方のァー ム部がより大きく橈み、 体重が作用していない方のアーム部は背板 2の変形によ り前方へ引っ張られる。 即ち、 背板 2は、 Fig. 4 1に示すように、 背板 2の中心 線 5 9を中心にして背板 2の上端が捩れるように変形する。 即ち、 第 2の背フレ ーム 5のアーム部が橈むことで背板 2の変形を妨げにくくなり、 背板 2を着座者 の姿勢に追従する形状に大きく変形させることができる。 また、 着座者が背板 2 の中心 （中心線 5 9の線上） に寄り掛かった場合には、 第 2の背フレーム 5の 2 本のアーム部が内側に向けて橈み、 Fig. 4 2に示すように、 背板 2の中央が後方 に突出するように大きく湾曲する。 即ち、 第 2の背フレーム 5のアーム部が橈む ことで背板 2の変形を妨げにくくなり、 背板 2を着座者の姿勢に追従する形状に 大きく変形させることができる。 さらに、 Fig. 4 3に示すように、 背板 2の片側 のみを変形させることも可能である。 即ち、 第 2の背フレーム 5の 2本のアーム 部のうち片方のみを大きく橈ませて、 着座者の姿勢に追従する形状に背板 2を大 きく変形させることができる。 また、 背板 2の上側を後方に反らすように湾曲さ せることもできる。 また、 これらの場合、 連結手段 6が背板 2と第 2の背フレー ム 5との間の捩れゃ撓みの動きを抑制することなく、 その動きを円滑にしている。 なお、 第 2の背フレーム 5に加えて第 1の背フレーム 1を可撓性を有する樹脂 例えばガラス繊維などで強化されたナイロン等によつて形成しても良い。 この場 合、 第 2の背フレーム 5のみを可撓性を有する樹脂によつて形成した場合に比べ て、 背板 2が変形しやすいものになり、 特に、 Fig. 4 1に示すように背板 2を捩 れるように変形させる場合に有効である。 本発明では、 少なくとも第 2の背フレーム 5の背板 2を連結する部分を可撓性 を有する樹脂によって形成することで背板 2の変形を妨げないようにしている。 このため、 簡易な構造で背板 2の変形の自由度を高めることができると共に、 部 品点数を増加させることもない。 For example, if the occupant leans on one side of the backboard 2 (a position deviated from the centerline 59 of the backboard 2), the fork branches above the connection point of the second back frame 5 by the connection plate 11. Of the two arms, the arm with the stronger weight of the occupant has a larger radius, and the arm with no weight acts on the back plate 2 due to the deformation of the back plate 2. Is pulled forward. That is, as shown in Fig. 41, the back plate 2 is deformed so that the upper end of the back plate 2 is twisted about the center line 59 of the back plate 2. That is, since the arm portion of the second back frame 5 bends, it is difficult to hinder the deformation of the back plate 2, and the back plate 2 can be largely deformed into a shape that follows the posture of the seated person. When the occupant leans on the center of the backboard 2 (on the center line 59), the two arms of the second back frame 5 bend inward. As shown in Fig. 5, the center of the back plate 2 is greatly curved so as to protrude backward. That is, since the arm portion of the second back frame 5 bends, it becomes difficult to hinder the deformation of the back plate 2, and the back plate 2 can be largely deformed into a shape that follows the posture of the seated person. Furthermore, as shown in Fig. 43, it is possible to deform only one side of the backboard 2. In other words, only one of the two arm portions of the second back frame 5 is largely deflected, and the back plate 2 can be largely deformed into a shape that follows the posture of the seated person. Further, the upper side of the back plate 2 may be curved so as to be warped backward. In these cases, the connecting means 6 smoothes the movement of the back plate 2 and the second back frame 5 without suppressing the movement of twisting and bending. The first back frame 1 in addition to the second back frame 5 may be formed of a flexible resin such as nylon reinforced with glass fiber or the like. In this case, the back plate 2 is more easily deformed than when only the second back frame 5 is formed of a flexible resin, and in particular, as shown in FIG. This is effective when the plate 2 is torsionally deformed. In the present invention, at least a portion connecting the back plate 2 of the second back frame 5 is formed of a flexible resin so that the deformation of the back plate 2 is not hindered. Therefore, the degree of freedom of deformation of the back plate 2 can be increased with a simple structure, and the number of parts does not increase.
また、 背板 2と背支持部材 6 1の少なくとも背板 2の上部を支持する部分を変 形可能とする上述の背凭れ構造では、 座板 2を屈曲領域から前後方向へ屈曲させ る必要がない場合にも独自に実施でき、 この場合には別部材である金属製第 1の 背フレーム 1と強化樹脂製第 2の背フレーム 5とによって背支持部材 6 1を構成 せずに、 第 1の背フレーム 1と第 2の背フレーム 5とを一体成形したものでも良 い。 即ち、 背支持部材 6 1の少なくとも背板 2に連結されて背板 2を支持する部 分、 例えば上部を可撓性を有する樹脂によって形成し橈み易くすれば足りる。 即 ち、 背板 2を良好に変形させることができる範囲で、 背支持部材 6 1の少なくと も上部を可撓性を有する樹脂によって形成すれば良い。  Further, in the above-described backrest structure in which at least a portion of the back plate 2 and the back support member 61 that supports the upper portion of the back plate 2 can be deformed, it is necessary to bend the seat plate 2 from the bending region in the front-rear direction. In this case, the first support frame 61 made of metal and the second back frame 5 made of reinforced resin do not constitute the back support member 61, but the first The back frame 1 and the second back frame 5 may be integrally formed. That is, it is sufficient that at least a portion of the back support member 61 that is connected to the back plate 2 and supports the back plate 2, for example, the upper portion is formed of a flexible resin so as to be easily bent. That is, at least the upper portion of the back support member 61 may be formed of a flexible resin as long as the back plate 2 can be deformed favorably.
また、 クッション材 2 7の取り付け構造は、 背支持部材 6 1の構造とは無関係 に、 スリッ ト 1 0を設けて舌片部 2 cを形成している背板 2であれば適用可能で ある。  Further, the mounting structure of the cushion material 27 can be applied to the back plate 2 provided with the slit 10 and forming the tongue piece portion 2c irrespective of the structure of the back support member 61. .
また、 上述のポケット部 2 8 bは上方に開口していたが、 ポケット部 2 8 bを 下向きに開口するようにしても良い。 この場合には、 図 3 3に示すように、 スリ ット 1 0を上向きに舌片部 2 cが形成されるように逆 U字形状にする。  Further, although the above-described pocket portion 28b is opened upward, the pocket portion 28b may be opened downward. In this case, as shown in FIG. 33, the slit 10 is formed in an inverted U shape so that the tongue piece 2c is formed upward.
また、 ポケット部 2 8 bの代わりに、 舌片部 2 cに係止できる手段、 例えばバ ンド部等を設けても良いことは勿論である。 ポケット部 2 8 bの代わりに例えば パンド部を設けた場合には、 スリ ッ ト 1 0が U字形状である場合は勿論のこと、 スリ ッ ト 1 0を逆 U字形状にしてもバンド部を舌片部 2 cに係止してカバー 2 8 を背板 2に取り付けることができる。 また、 Fig. 3 3に示すように、 パンド部 2 8 cが舌片部 2 cから抜けるのを防止するために、 スリッ ト 1 0に段部 1 0 aを 設けても良い。  In addition, it is a matter of course that a means that can be engaged with the tongue piece 2c, for example, a band or the like may be provided instead of the pocket 28b. For example, when a band is provided instead of the pocket 28b, the band is formed even if the slit 10 is U-shaped, even if the slit 10 is inverted U-shaped. The cover 28 can be attached to the back plate 2 by locking the tongue piece 2 c. As shown in Fig. 33, the slit 10 may be provided with a step 10a to prevent the band 28c from coming off the tongue 2c.
また、 上述の各実施形態では、 連結手段 6は、 軸部 1 3と、 キャップ 1 4と、 軸支手段 1 5を備えていたが、 必ずしもこの構成でなくても良い。 例えば、 Fig. 1 3に示す連結手段 6のように、 第 2の背フレーム 5の上端にリンク側ブラケッ ト 3 0を固着して第 2の背フレーム 5の軸方向に沿って長孔 3 1を設けると共に、 背板 2に背板側ブラケット 3 2を固着してこの背板側ブラケット 3 2に長孔 3 1 内を貫通するピン 3 3を取り付けるようにしても良い。 ピン 3 3が長孔 3 1内を 移動することで、 第 2の背フレーム 5の軸方向の相対変位を吸収することができ る。 また、 長孔 3 1内でピン 3 3が回転することで、 第 2の背フレーム 5と背板 2の上下方向の角度変化を吸収することができる。 なお、 Fig. 1 3の例では、 第 2の背フレーム 5側に長孔 3 1を、 背板 2側にピン 3 3を設けているが、 第 2の 背フレーム 5側にピン 3 3を、 背板 2側に長孔 3 1を設けても良い。 Further, in each of the above-described embodiments, the connecting means 6 includes the shaft portion 13, the cap 14, and the shaft supporting means 15, but the configuration is not necessarily limited to this. For example, as shown in the connection means 6 shown in Fig. 13, the link bracket is attached to the upper end of the second back frame 5. Along the axial direction of the second back frame 5, a slot 31 is provided along the axial direction of the second back frame 5, and a back plate side bracket 32 is fixed to the back plate 2, and a long A pin 33 passing through the hole 31 may be attached. By moving the pin 33 in the elongated hole 31, the relative displacement of the second back frame 5 in the axial direction can be absorbed. In addition, the rotation of the pin 33 in the elongated hole 31 can absorb a change in the vertical angle between the second back frame 5 and the back plate 2. In the example of Fig. 13, the long hole 31 is provided on the second back frame 5 side and the pin 33 is provided on the back plate 2 side, but the pin 33 is provided on the second back frame 5 side. An elongated hole 31 may be provided on the back plate 2 side.
また、 連結手段 6は、 例えば Fig. 3 4〜 3 6に示すように、 第 2の背フレーム 5の少なくとも上端に形成された円形の輪郭を有する軸部 5 1と、 背板 2の背面 に設けられ且つ軸部 5 1が下方から挿入され該軸部 5 1の傾斜を許容する揷入口 5 2が形成された軸部受け 5 3と、 軸部受け 5 3の上方に設けられ、 軸部 5 1の 先端の動きを許容する空間 5 4を画する部材 5 5を備えたものとしても良い。 Fi g. 3 6の例では、 部材 5 5として背板 2の背面に箱部 （以下、 箱部 5 5という） を形成し、 箱部 5 5の底壁を軸部受け 5 3、 箱部 5 5の内部空間を空間 5 4とし ている。 ただし、 軸部受け 5 3と空間 5 4を形成するためのものとしては、 箱部 5 5に限るものではないことは勿論である。  Further, as shown in FIGS. 34 to 36, for example, the connecting means 6 includes a shaft portion 51 having a circular contour formed at least at an upper end of the second back frame 5 and a back surface of the back plate 2. A shaft portion 51 provided with the shaft portion 51 inserted from below to allow the shaft portion 51 to be tilted; a shaft portion bearing 53 formed with an inlet 52; and a shaft portion provided above the shaft portion bearing 53; A member 55 that defines a space 54 that allows the movement of the tip of 51 may be provided. In the example of Fig. 36, a box (hereinafter referred to as a box 55) is formed on the back of the back plate 2 as the member 55, and the bottom wall of the box 55 is a bearing 53, a box. The interior space of 55 is defined as space 54. However, it is a matter of course that the structure for forming the bearing 53 and the space 54 is not limited to the box 55.
挿入口 5 2の概念を Fig. 3 7に示す。 挿入口 5 2の開口は軸部受け 5 3の内側 並びに表側の両面に向けて広がる円錐面がそれぞれ形成されている。 このため、 揷入口 5 2に挿入された軸部 5 1が軸部受け 5 3に対してみそすり運動を行うの が容易であり、 背板 2と第 2の背フレーム 5との間の相対的な動きの自由度が Fi g. 5のキャップ 1 4と軸部 1 3の組合せの場合よりも向上する。  Fig. 37 shows the concept of the insertion port 52. The opening of the insertion opening 52 is formed with a conical surface extending toward the inside of the shaft portion bearing 53 and to both surfaces on the front side. For this reason, it is easy for the shaft 51 inserted into the inlet 52 to make a razor movement with respect to the shaft bearing 53, and the relative position between the back plate 2 and the second back frame 5 is increased. The degree of freedom of movement is improved as compared with the combination of the cap 14 and the shaft 13 of FIG.
第 2の背フレーム 5を傾動させて背板 2の屈曲角度を調整する際、 第 2の背フ レーム 5の上端の移動量と背板 2の第 2の背フレーム 5を連結している部分、 即 ちリンク連結部分の移動量が相違するため、 第 2の背フレーム 5の上端と背板 2 のリンク連結部分との間に相対変位が生じるが、 この相対変位を連結手段 6が吸 収する。 即ち、 第 2の背フレーム 5の軸方向の相対変位は、 軸部受け 5 3に対し て軸部 5 1が軸方向に移動することで吸収することができる。 また、 第 2の背フ レーム 5と背板 2の相対的な角度変化は、 軸部受け 5 3に対して軸部 5 1がみそ すり運動を行うことで吸収することができる。 さらに、 第 2の背フレーム 5と背 ,板 2の水平方向の角度変化は、 軸部受け 5 3に対し軸部 5 1が回転することで吸 収することができる。 ' When adjusting the bending angle of the back plate 2 by tilting the second back frame 5, a portion connecting the movement amount of the upper end of the second back frame 5 and the second back frame 5 of the back plate 2. In other words, since the movement amount of the link connecting portion is different, a relative displacement occurs between the upper end of the second back frame 5 and the link connecting portion of the back plate 2, and the connecting means 6 absorbs the relative displacement. I do. That is, the relative displacement of the second back frame 5 in the axial direction can be absorbed by moving the shaft portion 51 in the axial direction with respect to the shaft portion bearing 53. In addition, the relative angle change between the second back frame 5 and the back plate 2 is such that the shaft portion 51 is misaligned with the shaft portion bearing 53. It can be absorbed by rubbing. Further, a change in the horizontal angle between the second back frame 5 and the back plate 2 can be absorbed by the rotation of the shaft 51 with respect to the shaft bearing 53. '
かかるタイプの連結手段 6では、 Fig. 5に示す連結手段 6で必要であった軸支 手段即ちヒンジ 1 5を省略することができる。 このため、 Fig. 5に示すものより 構造が簡単になり、 部品点数を少なくすることができると共に、 製造工程を少な くすることができ、 動きの自由度が向上するにもかかわらず製造コストを下げる ことができる。  In this type of connecting means 6, the shaft supporting means, that is, the hinge 15 required for the connecting means 6 shown in FIG. 5 can be omitted. For this reason, the structure is simpler than that shown in Fig. 5, and the number of parts can be reduced, and the number of manufacturing processes can be reduced. Can be lowered.
しかしながら、 Fig. 3 8に示すように、 連結手段 6の箱部 5 5を背板 2にピン 5 6によって連結し、 箱部 5 5を背板 2に対して上下方向に回転自在に取り付け るようにしても良い。  However, as shown in Fig. 38, the box part 55 of the connecting means 6 is connected to the back plate 2 by the pin 56, and the box part 55 is attached to the back plate 2 so as to be rotatable vertically. You may do it.
また、 変位手段 7は、 Fig. 1 4及ぴ Fig. 1 5に示すような、 複数の凹部 3 4 a を有する長孔 3 4とこの長孔 3 4を貫通しているピン 3 6の組み合わせから成る 構造にしても良い。 この変位手段 7は、 第 2の背フレーム 5又は接続板 1 2に、 複数の凹部 3 4 aを有する長孔 3 4が形成されているプレート 3 5を取り付ける と共に、 第 1の背フレーム 1にピン 3 6を取り付け、 ピン 3 6を長孔 3 4に通す ようにしている。 また、 プレート 3 5の下端近傍は、 長孔 3 7を設けておき、 こ の長孔 3 7にシャフト 4を貫通させ第 2の背フレーム 5が全体的に上下動し得る ように設けられている。  The displacement means 7 is a combination of a long hole 34 having a plurality of concave portions 34 a and a pin 36 passing through the long hole 34, as shown in FIGS. 14 and 15. The structure may be composed of This displacement means 7 attaches a plate 35 on which a long hole 34 having a plurality of recesses 34 a is formed to the second back frame 5 or the connecting plate 12, and attaches the first back frame 1 to the first back frame 1. Pin 36 is attached so that pin 36 passes through slot 34. A long hole 37 is provided in the vicinity of the lower end of the plate 35, and the shaft 4 is passed through the long hole 37 so that the second back frame 5 can move up and down as a whole. I have.
この変位手段 7によれば、 第 2の背フレーム 5の傾動角度を変える場合には、 第 2の背フレーム 5を持ち上げて長孔 3 4の凹部 3 4 aからピン 3 6を外し、 第 2の背フレーム 5の傾動角度を変えてピン 3 6を隣あるいはその他の凹部 3 4 a に対向させ、 この状態で第 2の背フレーム 5を降ろすようにする。 即ち、 ピン 3 6が嵌合する凹部 3 4 aの位置を変えることで、 背板 2の屈曲角度を調整するこ とができる。 第 2の背フレーム 5等の重さによってピン 3 6が凹部 3 4 aから外 れるのを防止することができるので、 第 2の背フレーム 5の傾動角度を固定する ことができ、 使用中に背板 2の屈曲角度を固定することができる。  According to the displacement means 7, when changing the tilt angle of the second back frame 5, the second back frame 5 is lifted, and the pin 36 is removed from the concave portion 34a of the elongated hole 34, and the second back frame 5 is removed. The tilt angle of the back frame 5 is changed so that the pin 36 faces the adjacent or other concave portion 34a, and the second back frame 5 is lowered in this state. That is, the bending angle of the back plate 2 can be adjusted by changing the position of the concave portion 34 a into which the pin 36 is fitted. The weight of the second back frame 5 and the like can prevent the pins 36 from coming off the recesses 34a, so that the tilt angle of the second back frame 5 can be fixed, and during use, The bending angle of the back plate 2 can be fixed.
なお、 Fig. 1 4 , Fig. 1 5には 2箇所の凹部 3 4 aを設けた例を示している力 凹部 3 4 aの数は 2箇所に限るものではないことは勿論である。 凹部 3 4 aの数 を増やすことで、 選択できる第 2の背フレーム 5の傾動角度の数が増え、 背板 2 の屈曲角度を多段階調整することができる。 FIGS. 14 and 15 show an example in which two concave portions 34 a are provided. The number of the concave portions 34 a is not limited to two. Number of recesses 3 4 a By increasing the number, the number of tilt angles of the second back frame 5 that can be selected is increased, and the bending angle of the back plate 2 can be adjusted in multiple stages.
また、 変位手段 7をカム構造にしても良い。 Fig. 1 6及ぴ Fig. 1 7に、 変位手 段 7をカム構造にした一例を示す。 この変位手段 7では、 接続板 1 2の背板 2側 に突出するように設けられているフランジ 1 2 bにカムプレート 3 8をピン 4 6 で回転自在に取りつけている。 カムプレート 3 8には長孔 3 8 aが形成されてお り、 長孔 3 8 aに固定ピン 3 9を貫通させることでカムプレート 3 8の回転でき る角度を一定の範囲に制限している。 図示しない操作レバーを回転操作すること で、 カムプレート 3 8を回転させて第 2の背フレーム 5と背板 2の間隔を変化さ せることができる。 カムプレート 3 8を操作して第 2の背フレーム 5と背板 2の 間隔を狭めた場合、 即ち、 Fig. 1 7の状態から Fig. 1 6の状態にカムプレート 3 8を操作した場合には、 背板 2は自身の弾性力によって元の形状に戻ろうとして 屈曲角度を減少させようとするので、 カムプレート 3 8から背板 2が離れること はない。 即ち、 カムプレート 3 8による押し広げ力が解除されると、 背板 2は自 身の弹性力によって屈曲角度を減少させる。 尚、 カムプレート 3 8の回転操作は、 カムプレート 3 8自体を直接駆動しても良いし、 ピン 4 6を回転させても良い。 カム構造を利用した変位手段 7では、 カムプレート 3 8の回転角度を任意角度 に固定できるようにすることで、 背板 2の屈曲角度を無段階調整することができ る。 また、 カムプレート 3 8のカム部分の形状を多角形にすることで、 第 2の背 フレーム 5の傾動角度を段階的に変化させることができるようになり、 背板 2の 屈曲角度を多段階調整することができる。  Further, the displacement means 7 may have a cam structure. Fig. 16 and Fig. 17 show an example where the displacement means 7 has a cam structure. In this displacement means 7, a cam plate 38 is rotatably attached to a flange 12b provided so as to protrude from the back plate 2 side of the connection plate 12 by a pin 46. A long hole 38a is formed in the cam plate 38, and the rotation angle of the cam plate 38 is limited to a certain range by passing the fixing pin 39 through the long hole 38a. I have. By rotating an operation lever (not shown), the cam plate 38 can be rotated to change the distance between the second back frame 5 and the back plate 2. When the distance between the second back frame 5 and the back plate 2 is reduced by operating the cam plate 38, that is, when the cam plate 38 is operated from the state of Fig. 17 to the state of Fig. 16 In other words, the back plate 2 does not separate from the cam plate 38 because the back plate 2 tries to return to the original shape by its own elastic force and tries to reduce the bending angle. That is, when the pushing force by the cam plate 38 is released, the back plate 2 reduces the bending angle due to its own natural force. In the rotation operation of the cam plate 38, the cam plate 38 itself may be directly driven, or the pin 46 may be rotated. In the displacement means 7 using a cam structure, the rotation angle of the cam plate 38 can be fixed to an arbitrary angle, so that the bending angle of the back plate 2 can be adjusted steplessly. In addition, by making the shape of the cam portion of the cam plate 38 into a polygon, the tilt angle of the second back frame 5 can be changed stepwise, and the bending angle of the back plate 2 can be changed in multiple steps. Can be adjusted.
また、 変位手段 7を Fig. 1 8及ぴ Fig. 1 9に示すようなリンク構造にしても良 い。 この変位手段 7では、 第 2の背フレーム 5に固着された接続板 1 2と背板 2 とが屈曲可能に連結された 2本のリンク 4 0 , 4 1によって連結されると共に、 接続板 1 2と背板 2の間にリターンスプリング 4 2が圧縮された状態で取りつけ られている。 Fig. 1 9の状態では、 リターンスプリング 4 2の付勢力によって 2 本のリンク 4 0 , 4 1を伸ばしながら第 2の背フレーム 5が後方に倒され、 背板 2の屈曲角度を増加させている。 また、 リターンスプリング 4 2の付勢力に抗し て 2本のリンク 4 0 , 4 1を縮める、 即ち屈曲させると、 Fig. 1 8に示すように、 第 2の背フレーム 5が起立して背板 2の屈曲角度が減少する。 図示しない操作手 段によって 2本のリンク 4 0 , 4 1の屈曲角度を変化させてその角度に固定する ことで、 背板 2の屈曲角度を調整することができる。 リンク構造を利用した変位 手段 7では、 2本のリンク 4 0 , 4 1を任意の屈曲角度に固定できるようにする ことで、 背板 2の屈曲角度を無段階調整することができる。 Further, the displacement means 7 may have a link structure as shown in FIGS. In this displacement means 7, the connecting plate 12 fixed to the second back frame 5 and the back plate 2 are connected by two links 40, 41 which are flexibly connected to each other. A return spring 42 is mounted between the back plate 2 and the back plate 2 in a compressed state. In the state shown in Fig. 19, the second back frame 5 is tilted backward while the two links 40, 41 are extended by the urging force of the return spring 42, and the bending angle of the back plate 2 is increased. I have. Also, when the two links 40, 41 are contracted or bent against the urging force of the return spring 42, as shown in Fig. 18, The second back frame 5 stands and the bending angle of the back plate 2 decreases. The bending angle of the back plate 2 can be adjusted by changing the bending angle of the two links 40 and 41 by operating means (not shown) and fixing the bending angle. In the displacement means 7 using the link structure, the bending angle of the back plate 2 can be adjusted steplessly by fixing the two links 40 and 41 at an arbitrary bending angle.
また、 上述の説明では第 2の背フレーム 5の上端を後方に倒すことで背板 2の 屈曲角度を増加させ、 例えばリクライニングの際、 着座者の背筋をより伸ばすこ とができるようにして背のス トレツチ効果をより良好に得ることができるように していたが、 必ずしもこの構成でなくても良い。  In the above description, the bending angle of the back plate 2 is increased by tilting the upper end of the second back frame 5 rearward, so that, for example, during reclining, the back of the occupant can be stretched more. Although it was possible to obtain the better stretching effect, it is not always necessary to use this configuration.
例えば、 Fig. 2 0〜Fig. 2 3に示すように、 背板 2の背板下部 2 bによって着 座者の臀部をサポートするようにしても良い。 この例では、 第 1の背フレーム 1 を上方に延出させ、 第 1の背フレーム 1に背板 2の背板上部 2 aを固定している。 また、 背板 2の背板下部 2 bは前後方向に傾動可能になっている。 第 2の背フレ ーム 5の上端は第 1の背フレーム 1に吊り下げられるようにして回転自在に取り つけられている。 また、 第 2の背フレーム 5の下端は、 背板 2の背板下部 2 に 連結されている。 変位手段 7の操作によって第 2の背フレーム 5を前後に傾動さ せることで、 背板 2の屈曲角度を変化させて背板下部 2 bを前後傾動させること ができる。 例えば、 背板 2の背板下部 2 bを前方に向けて傾動させることで背板 下部 2 bが着座者の臀部を支える臀部サポートとなり、 着座時のサポート感を得 ることができる。 尚、 背板 2の背板上部 2 aと背板下部 2 bの境界部分には樹脂 ヒンジなどによって屈曲領域 2 eが形成されている。  For example, as shown in FIGS. 20 to 23, the lower back 2b of the back plate 2 may support the buttocks of the seated person. In this example, the first back frame 1 is extended upward, and the back plate upper portion 2 a of the back plate 2 is fixed to the first back frame 1. Also, the lower portion 2b of the back plate 2 can be tilted in the front-rear direction. The upper end of the second back frame 5 is rotatably attached to the first back frame 1 so as to be suspended. The lower end of the second back frame 5 is connected to the lower back plate 2 of the back plate 2. By tilting the second back frame 5 back and forth by operating the displacement means 7, it is possible to change the bending angle of the back plate 2 and tilt the back plate lower portion 2b back and forth. For example, by tilting the lower back plate 2b of the back plate 2 toward the front, the lower back plate 2b becomes a buttocks support for supporting the buttocks of the occupant, and a feeling of support when sitting can be obtained. A bent region 2e is formed at the boundary between the upper portion 2a of the back plate 2 and the lower portion 2b of the back plate 2 by a resin hinge or the like.
なお、 Fig. 2 4及ぴ Fig. 2 5に示すように、 第 2の背フレーム 5を省略し、 第 1の背フレーム 1と背板 2の下部 2 bとの間に変位手段 7を設け、 変位手段 7の 変位を直接背板下部 2 bに伝達するようにしても良い。 この場合にも、 変位手段 7の操作によって背板 2の屈曲角度を変化させて背板下部 2 b、 即ち臀部サポー トを前後傾動させることができる。  As shown in Figs. 24 and 25, the second back frame 5 is omitted, and a displacement means 7 is provided between the first back frame 1 and the lower portion 2b of the back plate 2. Alternatively, the displacement of the displacement means 7 may be directly transmitted to the lower portion 2b of the back plate. Also in this case, the lower part 2b of the back plate, that is, the buttocks support can be tilted back and forth by changing the bending angle of the back plate 2 by operating the displacement means 7.
また、 Fig. 2 6に示すように、 背板 2を高さ調整できるようにしても良い。 第 1の背フレーム 1を下側フレーム 1 aと上側フレーム 1 bに更に分割すると共に、 下側フレーム 1 aの先端に設けた鉛直方向に開口する円筒部 1 cに上側フレーム 1 bを揷入し、 円筒部 1 cに対して上側フレーム 1 bをスライドさせることで、 背板 2の高さを調整する。 上側フレーム 1 bと円筒部 1 cとの連結は、 例えば上 側フレーム 1 bに設けられた複数の穴 4 7と、 円筒部 1 cの穴 4 8とを一致させ た状態で連結ピン 4 9を貫通させることによって行われる。 上側フレーム 1 bを- 円筒部 1 cに係止することで、 背板 2を調整後の高さに固定することができる。 背板 2の高さ調整を行うことで、 背板 2の屈曲部分の高さを変えることができる。 Fig. 2 7及び Fig. 2 8に示すように、 着座者の体格に応じて背板 2の高さ調整を 行うことで、 座り心地が向上する。 なお、 Fig. 2 7は子供が座っている様子を、 Fig. 2 8は大人が座っている様子を示している。 Further, as shown in Fig. 26, the height of the back plate 2 may be adjustable. The first back frame 1 is further divided into a lower frame 1a and an upper frame 1b, and a vertically-opening cylindrical portion 1c provided at a tip of the lower frame 1a is formed into an upper frame. 1b is inserted, and the height of the back plate 2 is adjusted by sliding the upper frame 1b with respect to the cylindrical portion 1c. The connection between the upper frame 1b and the cylindrical portion 1c is performed, for example, by connecting the plurality of holes 47 provided in the upper frame 1b with the holes 48 of the cylindrical portion 1c in a state where the connecting pins 49 are aligned. This is performed by penetrating through. By locking the upper frame 1b to the cylindrical portion 1c, the back plate 2 can be fixed at the adjusted height. By adjusting the height of the back plate 2, the height of the bent portion of the back plate 2 can be changed. As shown in Fig. 27 and Fig. 28, adjusting the height of the back plate 2 according to the physique of the occupant improves the sitting comfort. Fig. 27 shows a child sitting, and Fig. 28 shows an adult sitting.
また、 Fig. 2 9〜Fig. 3 2に示すように、 背凭れの他に、 背凭れを補助するサ ポート部材を設けても良い。 即ち、 背板 2の上端にサポート部材 4 4を前後方向 に回転可能に取り付けると共に、 サポート部材 4 4と第 1の背フレーム 1をリン ク 4 5によって連結し、 背板 2の屈曲に連動してサポート部材 4 4を傾動させる ようにしても良い。 サポート部材 4 4として例えばへッドレスト 4 4を挙げるこ とができる。 また、 それらの使用状態を Fig. 3 1及ぴ Fig 3 2に示す。 へッドレス ト 4 4の下端を背板 2の上端に回転可能に取り付け、 リンク 4 5によってヘッド レス ト 4 4の上端を第 1の背フレーム 1に連結している。 リンク 4 5はへッドレ スト 4 4及び第 1の背フレーム 1に対して回転自在に連結されている。 Fig. 2 9 及ぴ Fig. 3 1に示すように、 背板 2をあまり屈曲させていない状態ではへッドレ スト 4 4は後方に移動しており、 着座者の邪魔にならない。 この状態から背板 2 を屈曲させると、 Fig. 3 0及ぴ Fig. 3 2に示すようにへッ ドレス ト 4 4が前方に 移動し、 着座者の頭を支えることができる。  As shown in FIGS. 29 to 32, a support member for assisting the backrest may be provided in addition to the backrest. That is, the support member 44 is attached to the upper end of the back plate 2 so as to be rotatable in the front-rear direction, and the support member 44 and the first back frame 1 are connected by the link 45 so as to interlock with the bending of the back plate 2. Alternatively, the support member 44 may be tilted. As the support member 44, for example, a headrest 44 can be cited. The usage conditions are shown in Fig. 31 and Fig. 32. The lower end of the headrest 44 is rotatably attached to the upper end of the back plate 2, and the upper end of the head rest 44 is connected to the first back frame 1 by a link 45. The link 45 is rotatably connected to the headrest 44 and the first back frame 1. As shown in Fig. 29 and Fig. 31, when the back plate 2 is not bent so much, the headrest 44 moves backward and does not obstruct the occupant. When the backboard 2 is bent from this state, the headrest 44 moves forward as shown in FIGS. 30 and 32, and can support the head of the seated person.
なお、 サポート部材 4 4としては、 着座者の頭部をサポートするへッドレスト に限るものではない。 例えば、 Fig. 3 9及び Fig. 4 0に示すように、 着座者の肩 甲骨の部分から頭部までを支持可能なものであっても良い。 この Fig. 3 9及び Fi. g. 4 0のサポート部材 4 4は、 例えば、 パソコンを操作しながら背板 2に寄り掛 かると、 着座者はモニタを見るために背中の上部を若干起き上がらせるような姿 勢になる。 このような場合にも、 サポート体 5 7によって着座者の上半身をサボ 一トすることができる。 なお、 上述の実施形態では、 リンク 4 5を設けて背板 2の屈曲に連動してサボ 一ト部材 4 4を作動させるようにしているが、 サポート部材 4 4の動きを背板 2 の屈曲に連動させなくても良い。 サポート部材 4 4を背板 2に固定しても良いし、 場合によっては、 背板 2の屈曲から独立してサポート部材 4 4を操作する操作手 段を設け、 この操作手段によってサポート部材 4 4を傾動操作するようにしても 良い。 Note that the support member 44 is not limited to a headrest that supports the head of a seated person. For example, as shown in Fig. 39 and Fig. 40, it may be possible to support the seated person from the scapula to the head. The support members 44 of Fig. 39 and Fig. 40 are, for example, if the user leans on the backboard 2 while operating the personal computer, the occupant raises the upper back slightly to see the monitor. It looks like this. Even in such a case, the upper body of the seated person can be lifted by the support body 57. In the above-described embodiment, the link member 45 is provided to operate the servo member 44 in conjunction with the bending of the back plate 2. However, the movement of the support member 44 is controlled by the bending of the back plate 2. It does not need to be linked to. The support member 44 may be fixed to the back plate 2 or, in some cases, an operation means for operating the support member 44 independently of the bending of the back plate 2 is provided. May be tilted.
また、 図示していないが着座者が容易に操作できる位置に操作レバー等を設け、 調整ねじ 1 7、 カムプレート 3 8、 リンク 4 0 , 4 1等の変位手段 7を前記操作 レバー等を用いて操作することも可能である。  Although not shown, an operation lever or the like is provided at a position where the occupant can easily operate, and displacement means 7 such as an adjusting screw 17, a cam plate 38, and links 40 and 41 use the operation lever or the like. It is also possible to operate it.
また、 変位手段 7の駆動手段として、 調整ねじ 1 7、 カムプレート 3 8、 リン ク 4 0， 4 1等を回転させる電動モータを採用し、 スィッチ操作によって電動モ ータを始動 ·停止させて電動で変位手段 7を操作するようにしても良い。  In addition, as a driving means of the displacement means 7, an electric motor for rotating the adjusting screw 17, the cam plate 38, the link 40, 41, etc. is adopted, and the electric motor is started and stopped by a switch operation. The displacement means 7 may be operated electrically.
また、 変位手段 7として流体によって膨張、 収縮する袋を設けると共に、 この 袋を第 2の背フレーム 5及ぴ背板 2に接続し、 袋に対して空気等の流体を注入又 は吸引することで袋を膨張又は収縮させて第 2の背フレーム 5を傾動、 即ち背板 2を屈曲角度を変化させるようにしても良い。  In addition, a bag that expands and contracts with a fluid is provided as the displacement means 7, and the bag is connected to the second back frame 5 and the back plate 2, and a fluid such as air is injected or sucked into the bag. The bag may be expanded or contracted to tilt the second back frame 5, that is, to change the bending angle of the back plate 2.
さらに、 本発明は座に適用し、 座板の屈曲角度を調整するようにしても良い。 即ち、 座フレームと、 座フレームに前部又は後部が固定され、 後部又は前部が上 下方向に屈曲可能な座板と、 座板の屈曲角度を変化させ且つ屈曲角度を固定する 屈曲角度調整機構を備える椅子の座構造であっても良い。  Further, the present invention may be applied to a seat, and the bending angle of the seat plate may be adjusted. A seat frame, a front portion or a rear portion fixed to the seat frame, and a rear portion or the front portion capable of bending upward and downward; and a bending angle adjustment for changing a bending angle of the seat plate and fixing the bending angle. It may be a seat structure of a chair provided with a mechanism.
また、 座フレームに前部が固定され、 後部が上下方向に屈曲可能な座板と、 座 板の屈曲角度を変化させ且つ屈曲角度を固定する屈曲角度調整機構を備える椅子 の座構造であって、 座板の後部に背板 2の下部を固定し、 座板の後部を下方に屈 曲させると、 これに追従して背板 2が後方に傾動するようにしても良い。  Further, the seat structure of the chair includes a seat plate having a front portion fixed to the seat frame and a rear portion capable of bending vertically, and a bending angle adjusting mechanism for changing a bending angle of the seat plate and fixing the bending angle. Alternatively, when the lower portion of the back plate 2 is fixed to the rear portion of the seat plate and the rear portion of the seat plate is bent downward, the back plate 2 may be tilted rearward following this.
さらに、 Fig. 1の背凭れ構造では、 2本のパイプを別部材の接続板 1 2にて溶 接着けなどで連結することによって第 2の背フレーム 5を形成しているが、 これ らを一体成形するようにしても良い。 即ち、 第 2の背フレーム 5と、 接続板 1 2 と、 ブラケット 1 2 aを例えばアルミダイキャスト等の金属ダイキャスト等によ つて一体成形しても良い。 また、 金属ダイキャス トによる一体成形品に限らず、 樹脂製の一体成形品や金属製プレスによる一体成形品としても良い。 Further, in the backrest structure of Fig. 1, the second back frame 5 is formed by connecting the two pipes by welding or the like with the connecting plate 12 of another member. It may be formed integrally. That is, the second back frame 5, the connection plate 12, and the bracket 12a may be integrally formed by, for example, metal die casting such as aluminum die casting. Also, it is not limited to one-piece molded products by metal die casting. It may be an integrally molded product made of resin or an integrally molded product made of a metal press.
また、 可撓性のある変形可能な背板 2と、 これを支持する背支持部材 6 1の少 なくとも背板 2に連結される部分を可撓性をもたせた背凭れ構造は、 Fig. l ~Fi g. 1 2に示す実施形態において実施できることは既に述べたが、 Fig. 1 3〜Fig. 4 5に示す各実施形態においても実施できることは言うまでもない。 即ち、 着座 者が凭れ掛かつたときにその姿勢に応じて背板 2が変形する背凭れ構造は、 それ だけでも単独実施できるし、 背板 2を屈曲領域 2 eで前後方向へ屈曲させる背凭 れ構造と同時に実施することもできる。  In addition, the flexible back plate 2 and the back support structure that supports the back support member 61 with at least a portion connected to the back plate 2 with flexibility are shown in Fig. l to Fig. 12 have already been described as being practicable in the embodiment shown in FIGS. 13 to 45. Needless to say, the embodiment can be also performed in the embodiments shown in FIGS. That is, the backrest structure in which the backboard 2 is deformed in accordance with the posture when the seated person leans on the backboard 2 can be implemented alone, or the backboard 2 can be bent back and forth in the bending area 2 e. It can be carried out simultaneously with the leaning structure.
例えば、 屈曲角度調整機構 3を備えていない椅子、 即ち、 背支持部材 6 1によ つて背板 2を直接支持する構造の椅子に適用することも可能である。 これらの場 合にも、 背板 2の変形が容易であり着座者の動きに追従して変形しゃすくなり、 凭れ心地が良い点、 簡易な構造で背板 2の変形の自由度を高めることができる点、 部品点数を増加させない点等は、 上述の背凭れ構造と同様である。  For example, the present invention can be applied to a chair without the bending angle adjusting mechanism 3, that is, a chair having a structure in which the back plate 2 is directly supported by the back support member 61. In these cases as well, the back plate 2 can be easily deformed and deformed and follow the movement of the occupant, making it easy to lean on.The simple structure increases the degree of freedom of deformation of the back plate 2. This is similar to the above-described backrest structure in that the number of parts can be reduced and the number of parts is not increased.
例えば、 背板 2の上部に連結される部分のみが可撓性を発揮するようにガラス 繊維などの補強剤の配合量を調整した樹脂製背支持部材 6 1を 1組用意し、 各背 支持部材 6 1の剛性が比較的高い部分で背板 2の下部を固定して支持する一方、 背板 2の上部を可撓性のある背支持部材 6 1の先端部分に回転かつ摺動自在に連 結させ、 着座者の凭れ掛かる姿勢に応じて左右の背支持部材 6 1が別々に傾動し て背凭れを変形させるようにしても良い。 ここで、 背支持部材 6 1は、 左右が独 立して傾動するようにしても良いし、 座部下部を固定する部位よりも座受け部材 8への取付け部位側において互いに横補強部材で連結して一体化させても良い。 例えば、 変位手段 7を省略して、 座受け部材 8に傾動可能に取り付けられた第 1の背フレーム 1と、 当該第 1の背フレーム 1に傾動可能に取り付けられた第 2 の背フレーム 5とを有する背支持部材 6 1と、 背板屈曲領域 2 eと、 当該背板屈 曲領域 2 eよりも上側に位置する背板上部 2 aと、 背板屈曲領域 2 eよりも下側 に位置し且つ第 1の背フレーム 1に固定された背板下部 2 bとを有する背板 2と、 第 2の背フレーム 5の上端を背板上部 2 aにこれらの相対変位を吸収しながら連 結する連結手段 6とを備えるようにしても良い。 この場合には、 背板屈曲領域 2 eを変形させて背板下部 2 bに対して背板上部 2 aを前後方向に倒すことで背板 2を屈曲可能とし、 背板 2の少なくとも背板上部 2 aが変形可能である。 ここで、 第 2の背フレーム 5を可撓性を有する樹脂によって形成することにより、 背板 2 を更に水平面内で捩れるように変形させるようにすることも可能である。 この例 を Fig. 4 4及び Fig. 4 5に示す。 着座者が背板 2に寄り掛かると、 第 2の背フレ ーム 5が背板 2の背板上部 2 aを屈曲させる。 また、 同時に第 2の背フレーム 5 が着座者の姿勢に追従して撓むので、 背板 2の背板上部 2 aを着座者の姿勢に追 従して変形しやすくすることができる。 即ち、 この場合にも、 背板 2の変形が容 易であり着座者の動きに追従して変形しやすくなり、 座り心地が向上する点、 簡 易な構造で背板 2の変形の自由度を高めることができる点、 部品点数を増加させ ない点等は、 上述の背凭れ構造と同様である。 For example, one set of resin back support members 61 in which the amount of a reinforcing agent such as glass fiber is adjusted so that only the portion connected to the upper portion of the back plate 2 exhibits flexibility is prepared. The lower part of the back plate 2 is fixed and supported at the relatively rigid part of the member 61, while the upper part of the back plate 2 is rotatable and slidable on the tip of the flexible back support member 61. The left and right back support members 61 may be separately tilted to deform the backrest according to the posture of the seated person leaning on the back. Here, the back support members 61 may be tilted independently on the left and right, or may be connected to each other by a lateral reinforcing member on the side of the mounting portion to the seat receiving member 8 rather than the portion for fixing the lower portion of the seat. And may be integrated. For example, the first back frame 1 tiltably attached to the seat receiving member 8 with the displacement means 7 omitted, and the second back frame 5 tiltably attached to the first back frame 1 A back support member 61 having a back plate bending region 2 e, a back plate upper portion 2 a positioned above the back plate bending region 2 e, and a lower position positioned below the back plate bending region 2 e And a back plate 2 having a back plate lower portion 2b fixed to the first back frame 1 and an upper end of the second back frame 5 connected to the back plate upper portion 2a while absorbing these relative displacements. The connecting means 6 may be provided. In this case, the backboard bending area 2e is deformed, and the backboard upper section 2a is tilted in the front-back direction with respect to the backboard lower section 2b. 2 can be bent, and at least the upper portion 2a of the backboard 2 can be deformed. Here, by forming the second back frame 5 from a flexible resin, the back plate 2 can be further deformed so as to be twisted in a horizontal plane. This example is shown in Fig. 44 and Fig. 45. When the occupant leans on the backboard 2, the second back frame 5 bends the upper part 2 a of the backboard 2. Also, at the same time, the second back frame 5 bends following the posture of the seated person, so that the upper portion 2a of the back plate 2 can easily be deformed following the posture of the seated person. That is, also in this case, the deformation of the back plate 2 is easy, the deformation is easy to follow the movement of the occupant, and the sitting comfort is improved, and the degree of freedom of the deformation of the back plate 2 is simple. This is similar to the above-described backrest structure in that the number of parts can be increased and the number of parts is not increased.

Claims

請 求 の 範 囲 The scope of the claims
1 . 座受け部材に傾動可能に取り付けられた少なくとも 1つの第 1の背フレー ムと、 当該第 1の背フ ームに傾動可能に取り付けられた少なくとも 1つの第 2 の背フレームとを有する背支持部材と、 背板屈曲領域と、 当該背板屈曲領域より も上側に位置する背板上部と、 前記背板屈曲領域よりも下側に位置する背板下部 とを有する背板を備え、 前記背板上部と前記背板下部のうちいずれか一方が前記 第 1の背フレームに固定されると共に、 いずれか他方が前記第 2の背フレームに 支持されており、 前記背板屈曲領域を変形させて前記一方に対して前記他方を前 後方向に倒すことで前記背板は全体として屈曲可能であり、 前記第 1の背フレー ムに対する前記第 2の背フレームの傾動角度を調整することで前記背板の屈曲角 度を変化させ且つ屈曲角度を固定する屈曲角度調整機構を備えることを特徴とす る椅子の背凭れ構造。  1. A back having at least one first back frame tiltably attached to the seat receiving member and at least one second back frame tiltably mounted to the first back frame. A back plate having a support member, a back plate bending region, a back plate upper portion located above the back plate bending region, and a back plate lower portion located below the back plate bending region; One of a back plate upper portion and the back plate lower portion is fixed to the first back frame, and one of the other is supported by the second back frame, thereby deforming the back plate bending region. By tilting the other in the front-to-rear direction with respect to the one, the back plate can be bent as a whole, and the tilt angle of the second back frame with respect to the first back frame is adjusted to adjust the tilt angle of the second back frame. Changing the bending angle of the back plate and bending A chair backrest structure comprising a bending angle adjusting mechanism for fixing a bending angle.
2 . 前記背板下部を前記第 1の背フレームに固定すると共に、 前記背板上部を 前後方向に傾動可能にし、 前記屈曲角度調整機構を、 下端が前記第 1の背フレー ムに連結されて当該連結点を中心に上端が前後方向に傾動可能とされた前記第 2 の背フレームと、 前記第 2の背フレームの上端を前記背板上部にこれらの相対変 位を吸収しながら連結する連結手段と、 前記第 1の背フレームと前記第 2の背フ レームの間の前記連結点から離れた位置に設けられて前記第 1の背フレームと前 記第 2の背フレームとの間の距離を変化させる変位手段を備えて構成したことを 特徴とする請求の範囲第 1項記載の椅子の背凭れ構造。  2. The lower part of the back plate is fixed to the first back frame, and the upper part of the back plate is tiltable in the front-rear direction. The lower end of the bending angle adjusting mechanism is connected to the first back frame. The second back frame, the upper end of which can be tilted in the front-rear direction around the connection point; and a connection for connecting the upper end of the second back frame to the upper part of the back plate while absorbing these relative displacements. Means, and a distance between the first back frame and the second back frame provided at a position away from the connection point between the first back frame and the second back frame. 2. The backrest structure for a chair according to claim 1, wherein the backrest structure is provided with a displacement means for changing the distance.
3 . 変形可能な背板と、 少なくとも前記背板に連結される部分が可撓性を有す る樹脂によって形成された少なくとも 1つの背支持部材とを備えることを特徴と する椅子の背凭れ構造。  3. A backrest structure for a chair, comprising: a deformable back plate; and at least one back support member having at least a portion connected to the back plate formed of a flexible resin. .
4 . 前記背支持部材の上端を前記背板の上部にこれらの相対変位を吸収しなが ら連結する連結手段を備えることを特徴とする請求の範囲第 3項記載の椅子の背 凭れ構造。  4. The backrest structure for a chair according to claim 3, further comprising a connecting means for connecting an upper end of the back support member to an upper portion of the back plate while absorbing these relative displacements.
5 . 座受け部材に傾動可能に取り付けられた少なくとも 1つの第 1の背フレー ムと、 当該第 1の背フレームに傾動可能に取り付けられた少なくとも 1つの第 2 の背フレームとを有する背支持部材と、 背板屈曲領域と、 当該背板屈曲領域より も上側に位置する背板上部と、 前記背板屈曲領域よりも下側に位置し且つ前記第 1の背フレームに固定された背板下部とを有する背板と、 前記第 2の背フレーム の上端を前記背板上部にこれらの相対変位を吸収しながら連結する連結手段とを 備え、 前記背板屈曲領域を変形させて前記背板下部に対して前記背板上部を前後 方向に倒すことで前記背板は全体として屈曲可能であり、 前記背板の少なくとも 前記背板上部は変形可能であると共に、 前記第 2の背フレームは可撓·生を有する 樹脂によつて形成されていることを特徴とする椅子の背凭れ構造。 5. A back support member having at least one first back frame tiltably attached to the seat receiving member and at least one second back frame tiltably mounted to the first back frame. And the backboard bending area, and from the backboard bending area A back plate having a back plate upper portion also located on the upper side, a back plate lower portion located below the back plate bending region and fixed to the first back frame, and a second back frame. Connecting means for connecting the upper end to the upper part of the backboard while absorbing these relative displacements, by deforming the bent area of the backboard and tilting the upper part of the backboard forward and backward with respect to the lower part of the backboard. The back plate is bendable as a whole, and at least the upper portion of the back plate is deformable, and the second back frame is formed of a flexible resin. Characterized chair backrest structure.
6 . 座受け部材に傾動可能に取り付けられた少なくとも 1つの第 1の背フレー ムと、 当該第 1の背フレームに傾動可能に取り付けられた少なくとも 1つの第 2 の背フレームとを有する背支持部材と、 背板屈曲領域と、 当該背板屈曲領域より も上側に位置する背板上部と、 前記背板屈曲領域よりも下側に位置し且つ前記第6. A back support member having at least one first back frame tiltably attached to the seat receiving member and at least one second back frame tiltably mounted to the first back frame. A back plate bending region; a back plate upper portion located above the back plate bending region; and a back plate bending region located below the back plate bending region and
1の背フレームに固定された背板下部とを有する背板を備え、 前記背板屈曲領域 を変形させて til記背板下部に対して前記背板上部を前後方向に倒すことで前記背 板は全体として屈曲可能であり、 前記第 1の背フレームに対する前記第 2の背フ レームの傾動角度を調整することで前記背板の屈曲角度を変化させ且つ屈曲角度 を固定する屈曲角度調整機構を備えると共に、 前記屈曲角度調整機構は、 下端が 前記第 1の背フレームに連結されて当該連結点を中心に上端が前後方向に傾動可 能とされた前記第 2の背フレームと、 前記第 2の背フレームの上端を前記背板上 部にこれらの相対変位を吸収しながら連結する連結手段と、 前記第 1の背フレー ムと前記第 2の背フレームの間の前記連結点から離れた位置に設けられて前記第 1の背フレームと前記第 2の背フレームとの間の距離を変化させる変位手段を有 し、 前記背板の少なくとも前記背板上部は変形可能であると共に、 前記第 2の背 フレームは可撓性を有する樹脂によって形成されていることを特徴とする椅子の 背凭れ構造。 A back plate having a back plate fixed to the back frame of the back plate, wherein the back plate bending region is deformed to tilt the upper portion of the back plate in the front-rear direction with respect to the lower portion of the back plate. A bending angle adjustment mechanism that changes the bending angle of the back plate and fixes the bending angle by adjusting the tilt angle of the second back frame with respect to the first back frame. The second back frame having a lower end connected to the first back frame, and an upper end capable of tilting in the front-rear direction about the connection point; Connecting means for connecting the upper end of the back frame to the upper portion of the back plate while absorbing these relative displacements; and a position separated from the connection point between the first back frame and the second back frame. The first back frame provided in the Displacement means for changing the distance from the second back frame is provided, and at least the upper part of the back plate is deformable, and the second back frame is made of a flexible resin. A chair backrest structure characterized by being formed.
7 . 前記変位手段は、 前記第 1の背フレームと前記第 2の背フレームのいずれ か一方に設けられた調整ねじと、 いずれか他方に設けられ前記調整ねじが揷入さ れるねじ孔を有する雌ねじ部材と、 前記調整ねじと前記雌ねじ孔部材のうち少な くとも一方の角度を上下方向に変化させる角度変化手段を備えたことを特徴とす る請求の範囲第 2項または第 6項記載の椅子の背凭れ構造。 7. The displacement means has an adjustment screw provided on one of the first back frame and the second back frame, and a screw hole provided on one of the other, and into which the adjustment screw is inserted. 7. The female screw member according to claim 2, further comprising: a female screw member; and angle changing means for changing at least one angle of the adjusting screw and the female screw hole member in a vertical direction. Chair backrest structure.
8 . 前記連結手段は、 前記第 2の背フレームの少なくとも上端に形成された円 形の輪郭を有する軸部と、 前記軸部に相対回転自在且つ軸方向に摺動自在な連結 部と、 前記連結部を前記背板に上下方向に回転自在に取りつける軸支手段を備え、 前記連結部は前記軸部から脱落しない程度の長さを有していることを特徴とする 請求の範囲第 2項、 第 4項、 第 5項、 第 6項のいずれかに記載の椅子の背凭れ構 造。 8. The connecting means includes a shaft portion having a circular contour formed at least at an upper end of the second back frame; a connecting portion rotatable relative to the shaft portion and slidable in the axial direction; 3. The vehicle according to claim 2, further comprising: a shaft supporting means for attaching a connecting portion to the back plate so as to be rotatable in a vertical direction, wherein the connecting portion has a length that does not drop off from the shaft portion. The chair backrest structure according to any one of paragraphs 4, 5, and 6.
9 . 前記連結手段は、 前記第 2の背フレームの少なくとも上端に形成された円 形の輪郭を有する軸部と、 前記背板の背面に設けられ且つ前記軸部が下方から挿 入され該軸部の傾斜を許容する揷入口が形成された軸部受けと、 前記軸部受けの 上方に設けられ、 前記軸部の先端の動きを許容する空間を画する部材を備えたこ とを特徴とする請求の範囲第 2項、 第 4項、 第 5項、 第 6項のいずれかに記載の 椅子の背凭れ構造。  9. The connecting means includes a shaft portion having a circular contour formed at least at an upper end of the second back frame, and a shaft portion provided on the back surface of the back plate, wherein the shaft portion is inserted from below and the shaft portion is provided. A shaft bearing having an inlet formed to allow inclination of the shaft portion, and a member provided above the shaft bearing and defining a space for allowing movement of a tip of the shaft portion. The chair backrest structure according to any one of claims 2, 4, 5, and 6.
1 0 . 前記背板屈曲領域に少なくとも 1つのスリットを形成することで前記背 板上部又は前記背板下部を前後方向に傾動可能にしたことを特徴とする請求の範 囲第 1項、 第 2項、 第 5項、 第 6項のいずれかに記載の椅子の背凭れ構造。  10. The range of claim 1, wherein at least one slit is formed in the bent region of the back plate so that the upper portion of the back plate or the lower portion of the back plate can be tilted in the front-rear direction. Item 7. The chair backrest structure according to any one of items 5, 5 and 6.
1 1 . 前記背板の上端に背凭れを補助するサポート部材を回転可能に取り付け ると共に、 前記サポート部材と前記第 1の背フレームをリンクによって連結し、 前記背板の屈曲に連動して前記サポート部材を回転させることを特徴とする請求 の範囲第 1項、 第 2項、 第 5項、 第 6項のいずれかに記載の椅子の背凭れ構造。  11. A support member for assisting a backrest is rotatably attached to an upper end of the back plate, and the support member and the first back frame are connected by a link, and the support member is interlocked with the bending of the back plate. The backrest structure for a chair according to any one of claims 1, 2, 5, and 6, wherein the support member is rotated.
1 2 . 前記樹脂は、 ガラス入りナイロンであることを特徴とする請求の範囲第 3項から第 6項のいずれかに記載の椅子の背凭れ構造。 12. The backrest structure for a chair according to any one of claims 3 to 6, wherein the resin is nylon with glass.
PCT/JP2003/012919 2002-10-11 2003-10-08 Structure of chair backrest WO2004037047A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012109710A1 (en) * 2012-10-11 2014-06-12 Grammer Ag Vehicle seat with changeable backrest shape

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008112918A1 (en) * 2007-03-13 2008-09-18 Hni Technologies Inc. Dynamic chair back lumbar support system
JP5524564B2 (en) * 2009-10-19 2014-06-18 株式会社岡村製作所 Chair back
JP5514509B2 (en) 2009-10-26 2014-06-04 株式会社イトーキ Rocking chair
CN101953592B (en) * 2010-04-16 2012-09-05 天津开发区奥金高新技术有限公司 Automatically adjustable back cushion
JP6135098B2 (en) * 2012-11-06 2017-05-31 コクヨ株式会社 Chair
CN106108442A (en) * 2016-08-22 2016-11-16 南宁曦聚绰新能源有限公司 A kind of Multi-purpose chair
KR101917582B1 (en) * 2018-08-17 2018-11-09 주식회사 대하정공 A chair including a backrest with tension

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04101652U (en) * 1991-01-31 1992-09-02 株式会社伊藤喜工作所 chair backrest device
JPH04118059U (en) * 1991-04-05 1992-10-22 デユポン・ジヤパン・リミテツド chair with backrest
EP0591933A1 (en) * 1992-10-06 1994-04-13 COMFORTO GmbH Chair with backrest
JP2000079034A (en) * 1998-07-09 2000-03-21 Okamura Corp Chair

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1330907A (en) * 2000-06-09 2002-01-16 普罗科德有限公司 Chair with synchronous swing seat and back

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04101652U (en) * 1991-01-31 1992-09-02 株式会社伊藤喜工作所 chair backrest device
JPH04118059U (en) * 1991-04-05 1992-10-22 デユポン・ジヤパン・リミテツド chair with backrest
EP0591933A1 (en) * 1992-10-06 1994-04-13 COMFORTO GmbH Chair with backrest
JP2000079034A (en) * 1998-07-09 2000-03-21 Okamura Corp Chair

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012109710A1 (en) * 2012-10-11 2014-06-12 Grammer Ag Vehicle seat with changeable backrest shape
US9079514B2 (en) 2012-10-11 2015-07-14 Grammer Ag Vehicle seat comprising an adjustable backrest shape

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