JP6092539B2 - Method of attaching skin material to chair substrate and chair - Google Patents

Description

  The present invention relates to a method of attaching a skin material to be mounted so as to cover a surface of a backrest of a chair, a seat plate of a seat, and the like, and a chair to which the skin material is attached.

  As a chair in which a skin material is attached to a board such as a back plate or a seat board of a chair, as described in Patent Document 1, for example, a cushion material attached to the surface of the board is covered with the skin material, On the back side, there is one in which the tightening string inserted through the peripheral edge of the skin material is tensioned to narrow the peripheral edge. Such a method of attaching the skin material is generally applied to a substrate having a substantially flat plate shape. If the substrate is bent to the surface side near the center, a fastening string is used. When the periphery of the skin material is shrunk by tensioning, the periphery of the tightening string that opposes in the vicinity of the bent portion is largely separated from the back surface of the substrate, so that the skin material is loosened in the vicinity of the bent portion and the surface is likely to be wrinkled. .

In order to solve this problem, for example, in Patent Document 2, a cushion material provided on the surface of a substrate whose middle portion is bent in a letter-like shape in a side view is covered with a skin material, and the periphery of the skin material is covered. By locking the attached tightening string to the locking portions provided on the back surfaces of both sides near the bent portion of the substrate, the peripheral edge of the skin material is separated from the back surface of the substrate in the vicinity of the bent portion of the substrate. There is something to prevent.
Further, for example, in Patent Document 3, the surface of a substrate (back plate) whose middle portion in the vertical direction is bent in the shape of a side view is covered with a skin material, and the synthetic resin is fixed to both sides of the skin material. When the tape-shaped side edge member is fitted to the upper and lower bosses projecting from the back surface of both side portions on the back surface side of the back plate, both side portions of the skin material are detached from the substrate or loosened. A chair that can prevent this is disclosed.

Japanese Patent Laid-Open No. 9-10450 JP 2005-160894 A Japanese Patent Laying-Open No. 2011-92544 (FIG. 13 etc.)

  In the chair described in Patent Document 2, since the peripheral edges of both side portions of the skin material are locked to the locking portions only in the vicinity of the bent portion of the substrate, the tightening string is loosened or the skin material is left and right. When it is pulled strongly in the direction, both sides of the skin material may move toward the surface side of the substrate in a portion that is not locked by the locking portion, and the surface of the skin material may be loosened.

  Also in the chair described in Patent Document 3, both sides of the skin material are partially fitted in a discontinuous manner to a plurality of bosses that project apart from each other, so that the skin material is left and right. When pulled strongly in the direction, the portion of the skin material that is not fitted to the boss may move to the surface side of the substrate. Also, since both sides of the skin material are partially fitted to the boss, and the attachment strength of both sides of the skin material to the back plate is based only on the fitting between the boss and the mounting hole, the skin material When is pulled strongly in the left-right direction, a large pulling force is locally applied to the mounting hole, and the mounting hole may be torn.

Furthermore, since it is necessary to fix a side edge member made of synthetic resin, which is a separate member, on both sides of the skin material, or to make a mounting hole in this edge material, the cost of the skin material increases. There's a problem.
To attach and detach the skin material, the substrate must be completely removed from the back frame, and then the edge member must be detached from the boss. Therefore, the work of attaching and detaching the skin material is troublesome.

  The present invention has been made in view of the above-described problems, and the skin material covering the surface of the substrate is free from slack and wrinkles without performing any processing on the substrate or using special attachment means. An object of the present invention is to provide a method of attaching a skin material to a board of a chair, and a chair, which can prevent the lateral displacement and can be attached tightly and easily.

According to the method of attaching the skin material to the board of the chair of the present invention, the above problems are solved as described in the following items.
(1) a substrate support frame supported by a leg or a support provided thereon, and a substrate attached to the surface side of the substrate support frame and having an intermediate portion bent convexly toward the surface side in a side view The board in a chair provided with a skin material having a folded portion folded back on the back surface side, covering the outer periphery of the substrate and a part of the back surface continuous with the periphery of the planar portion covering the surface of the substrate. A method of attaching a skin material, wherein the folded portions on both left and right side portions of the skin material can be expanded and contracted in the longitudinal direction, and by extending the folded portions on the left and right sides, the skin material is placed on the substrate, and the folded portions around it. fitted from the surface side to cover the rear surface outer peripheral portion of the substrate by, then the back surface of the portion opposed spaced apart at least the bent portion of the substrate in the folded portion of the left and right side portions, the substrate supporting frame The protrusion protruding surface side of the left and right side portions, and pressed toward the surface side, attaching said substrate to the substrate support frame.

According to such a configuration, when the back surface of the folded portion on both the left and right sides facing away from the bent portion of the substrate is pressed to the surface side by the protrusions on both the left and right sides of the substrate support frame, Since the tension is applied to the part and the surface part of the skin material is pulled to the left and right sides, the skin material is applied to the substrate without any processing or using special attachment means. It can be tightened tightly to prevent slack and wrinkles.
Further, when the folded portions on both sides are pressed to the surface side, both sides of the skin material are in close contact with both sides of the substrate and the frictional resistance is increased, so that the possibility of the skin material being shifted outward is reduced. Therefore, it is not necessary to use a skin tightening string or fixing means.
Furthermore, since the folded portions on both sides can be expanded and contracted in the longitudinal direction, the skin material can be easily attached to or removed from the substrate.

(2) In the above item (1), the folded portion of the skin material excluding the folded portions on both the left and right sides is made inextensible.

  According to such a configuration, the tension when pressing the folded portions on both sides is transmitted to the folded portions other than the both sides, and they are prevented from extending at the same time. It is possible to prevent the portion from sagging over the entire circumference and prevent the surface portion from being slackened or wrinkled.

(3) In the above item (2), the stretch preventing member is attached to the folded portion of the skin material excluding the folded portions on the left and right side portions, thereby making the portion non-stretchable.

  According to such a structure, the folding | returning part of the general skin material used for a chair can be easily made into an expansion-contraction simply by attaching an expansion | extension stop member.

(4) In the above item (3), the stretch preventing member is made of a synthetic resin stretch preventing tape or a stretch preventing plate.

  According to such a configuration, the folded portion of the skin material can be reinforced.

(5) In any one of the above items (1) to (4), ribs facing the longitudinal direction and projecting to the front surface side as projections are provided on the left and right sides of the substrate support frame. The folded portions on both the left and right sides are clamped by the back surface of the substrate.

  According to such a configuration, it is possible to prevent the folded portions on both the left and right sides from coming off the outside of the substrate and the occurrence of slack in the surface portion of the skin material.

(6) In the above item (5), on the inner side of the ribs of the substrate support frame, longitudinal protrusions projecting toward the rear surface are provided on the back surfaces of the left and right sides of the substrate. The folded portions on the left and right sides are clamped by the surface of the support frame.

  According to such a configuration, the folded portions on the left and right side portions are sandwiched between the inner side and the outer side, so that the folded portions on the left and right side portions can be disengaged to the outer side of the substrate. It is surely prevented that slack is generated.

According to the chair of the present invention, the above problems are solved as follows.
(7) A substrate support frame that is supported by a leg or a support provided thereon and has protrusions projecting to the surface side on both sides, and is attached to the surface side of the substrate support frame, and the intermediate portion is the surface in a side view A substrate bent in a convex shape toward the side, a planar portion covering the surface of the substrate, a peripheral portion thereof, and folded back to the back surface side so as to cover the back surface outer peripheral portion of the substrate, and at least left and right and a both side portions stretchable and the folded portion, at least the back surface of the portion facing apart from the bent portion of the substrate in the left and right side portions of the folded portion, projections of the substrate supporting frame in a state where elongated And a skin material pressed toward the surface side.

According to such a configuration, the back surface of the portion facing away from the bent portion of the substrate at the folded portion on both the left and right sides is pressed to the front side by the protrusions on the left and right sides of the substrate support frame in an expanded state. Since the tension is applied to the folded parts on both sides and the surface of the skin material is pulled to the left and right sides, the substrate can be processed without any processing or using special attachment means. In addition, the skin material can be tightly stretched by preventing the occurrence of slack and wrinkles.
Also, if the folded portions on both sides in the stretched state are pressed to the front side, both sides of the skin material will be in close contact with both sides of the substrate and the frictional resistance will increase, so the skin material may shift outward. Becomes smaller. Therefore, it is not necessary to use a skin tightening string or fixing means.
Furthermore, since the folded portions on both sides can be expanded and contracted in the longitudinal direction, the skin material can be easily attached to or removed from the substrate.

(8) In the above item (7), the stretch preventing member is attached to the folded portion of the skin material except for the folded portions on both the left and right sides, thereby making the portion non-stretchable.

  According to such a configuration, it is possible to provide a chair in which the stretchable member cannot be easily expanded and contracted simply by attaching the stretch preventing member to the folded portion of a general skin material.

(9) In the above item (8), the stretch preventing member is made of a synthetic resin stretch preventing tape or a stretch preventing plate.

  According to such a configuration, a chair in which the folded portion of the skin material is reinforced can be provided.

(10) In any one of the above (7) to (9), the folded portions on the left and right side portions are provided on the left and right side portions of the substrate support frame so as to face the longitudinal direction and protrude to the surface side. A pressure is applied between the tip of the rib as the protrusion and the back surface of the substrate.

  According to such a configuration, it is possible to provide a chair in which the folded portions on both the left and right side portions are prevented from coming off the outside of the substrate or the surface portion of the skin material being slackened.

(11) In the above item (10), the folded portions of the left and right side portions are provided on the back side of the left and right side portions of the substrate on the inner side of the ribs of the substrate support frame so as to protrude to the back surface side. The tip of the ridge is clamped by the surface of the substrate support frame.

  According to such a configuration, the folded portions on the left and right side portions are sandwiched between the inner side and the outer side, so that the folded portions on the left and right side portions can be disengaged to the outer side of the substrate. Thus, it is possible to provide a chair that is reliably prevented from being slackened.

  According to the present invention, without subjecting the substrate to any processing or the use of special attachment means, the skin material covering the surface is prevented from being loosened and wrinkled, and laterally displaced. It is possible to provide a method of attaching a skin material to a base plate of a chair and a chair that can be attached tightly and easily while preventing the problem.

It is a front view of a chair provided with one Embodiment of the attachment method of the skin material concerning this invention. It is the disassembled perspective view which looked at a part of the backrest and the backrest support ridge from diagonally forward. It is the disassembled perspective view which looked at the backrest from diagonally backward. It is a rear view of the backrest when the rear cover is removed. FIG. 5 is an enlarged vertical side view of the VV line in FIG. 4 with a rear cover and a backrest support rod attached. FIG. 6 is an enlarged vertical side view taken along the line VI-VI in FIG. 4 in a state in which a rear cover and a backrest support rod are attached. It is the VII-VII line expanded sectional view of Drawing 4 in the state where the back cover was attached. FIG. 5 is an enlarged cross-sectional plan view taken along line VIII-VIII of FIG. 4 with a rear cover attached. FIG. 5 is an enlarged cross-sectional plan view taken along the line IX-IX in FIG. 4 with a rear cover attached. FIG. 5 is an enlarged cross-sectional plan view taken along line XX of FIG. 4 with a rear cover attached. FIG. 5 is an enlarged cross-sectional plan view taken along the line XI-XI in FIG. 4 with a rear cover attached. It is the XII-XII line expanded sectional view of FIG. It is the perspective view when the point which attaches | subjects a skin material to a back support board | substrate is shown, and the skin material is mounted to the middle. Similarly, it is a perspective view after mounting | wearing a skin material to a backrest board | substrate.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, in this chair, the upper end of the column 3 in a leg 4 in which a column 3 is erected in the center of five radially extending legs 2 each having a caster 1 at the tip. Further, a support body 7 that supports the seat 5 and the backrest 6 is provided.

The backrest 6 extends rearward from the support body 7 and is supported by the upper portion of the upright portion of the backrest support collar 8 (see FIG. 2) that stands in a side-view forward L-shape.
The front end portion of the backrest support rod 8 is pivotally attached to the support body 7 with an axis (not shown) whose front end portion faces in the left-right direction, and can be tilted backward with respect to the support body 7 together with the backrest 6. However, since the reclining mechanism for the subsequent tilt is not directly related to the present invention, illustration and detailed description thereof are omitted.
In some cases, the front end portion of the backrest support rod 8 is fixed to the support 7.

  As shown in FIGS. 2 and 3, the backrest 6 includes a substrate support frame 9 having a substantially rectangular frame shape made of a hard synthetic resin material, and a flexible material such as an elastomer or a soft synthetic resin material mounted on the front surface thereof. A back support substrate 10 made of a soft material having a property, a skin material 11 attached to the back support substrate 10 so as to cover the front surface and the rear surface (back surface) of the outer periphery of the back support substrate 10, and a hard synthetic resin The rear cover 12 is made of a material and is attached to the substrate support frame 9 so as to cover the rear surface of the substrate support frame 9. In addition, the detailed attachment method of the skin material 11 is mentioned later.

  The substrate support frame 9 is a pair of left and right longitudinally facing in the vertical direction, with a portion slightly below the central portion in the vertical direction in side view bent gently so as to protrude convexly toward the front which is the surface side. The upper connecting portion 14 that connects the flanges 13 and 13 and the upper end portions thereof, and is curved in a substantially arc shape so that the central portion in the left and right direction protrudes rearward in plan view, and the left and right vertical rods 13 and 13 A lower connecting portion 15 that connects the lower end portions with a vertical width larger than the vertical width of the upper connecting portion 14, and is curved in a substantially arc shape so that a central portion in the left-right direction protrudes backward in plan view; A pair of left and right inclined rods 16, 16 extending obliquely from the central portion in the left-right direction at the upper end of the lower connecting portion 15 toward the upper part of the left and right vertical rods 13, 13. I have. Note that the substrate support frame 9 and the backrest support rod 8 may be integrated into one member.

As shown in FIG. 5, a rectangular recess 17 whose only lower end is opened is provided in the central portion in the left-right direction of the lower connecting portion 15, and the upper end of the upright portion of the rear portion of the backrest support rod 8 is provided in this recess 17. The board support frame 9 is attached to the back support rod 8 by fastening the upper end portion thereof and the front wall 18 of the recess portion 17 in the lower connecting portion 15 with four bolts 19. It is firmly fixed to the upper end of the rear standing part.
As shown in FIG. 2, the upright portion of the backrest support rod 8 is a ridge 8a facing in the up-down direction projecting in a U-shape projecting in a plan view projecting forward on the left and right side portions of the metal plate facing in the left-right direction. 8a are bent and formed, and, as shown in FIG. 5, two bolts 19 are fastened to the front wall 18 at two upper portions of each protrusion 8a.

  As shown in FIG. 2 and FIGS. 6 to 11, front concave grooves 20 facing in the vertical direction are provided on the front surfaces of the left and right vertical rods 13 in the substrate support frame 9 so as to intersect with the concave grooves 20. In addition, each vertical rod 13 is provided with a plurality of pin insertion holes 21 facing in the left-right direction at appropriate intervals in the up-down direction.

As shown in FIGS. 3, 4, and 8, an arcuate guide groove 22 facing in the left-right direction for guiding the pin to each pin insertion hole 21 is provided on the outer side of the rear surface of each vertical rod 13. ing.
As shown in FIGS. 3, 4, and 6, a longitudinally long through hole penetrating in the front-rear direction is formed at the bottom of the concave groove 20 in each vertical rod 13 and corresponding to the pin insertion hole 21. 23 is provided.

  As shown in FIGS. 3, 4, and 10, a rectangular penetrating portion that penetrates in the front-rear direction, including a part of the concave groove 20, on both sides of the lower connecting portion 15 at the lower portion of each vertical shaft 13. A hole 24 is provided.

  As shown in FIGS. 3, 4, 9, and 11, stepped holes 25, 25 are provided in the upper and lower portions sandwiching the through hole 24 on the rear surface of each vertical rod 13.

  As shown in FIGS. 2, 4, and 6, engagement holes 26 having a substantially square shape in a plan view are provided at both ends of the upper connecting portion 14 at the upper end of each vertical shaft 13.

  As shown in FIG. 2 to FIG. 4 and FIG. 7, an oval shallow recessed step portion 27 facing in the left-right direction is provided at the center in the left-right direction on the rear surface of the upper connecting portion 14. A screw insertion hole 28 is provided at the center of the stepped portion 27, and option member attachment holes 29, 29 are provided at both sides thereof.

  Positioning holes 30 and 30 are provided on both sides of the recessed step portion 27 on the rear surface of the upper connecting portion 14, and stepped holes 31 and 31 are provided on both outer sides.

  The front and rear surfaces of the substrate support frame 9 are provided with a large number of ribs and lightening holes for the purpose of reinforcement and material reduction. Only those relevant to the present invention will be described, and the others Description of is omitted.

As shown in FIG. 2 and FIGS. 7 to 11, the substrate support frame 9 is formed with an inner edge of each vertical rod 13 and extended vertically from there to an upper connecting portion 14 and a lower connecting portion. Vertical ribs 32 forming ribs on the front surface of 15 are projected forward.
Inside the support means (described later) for supporting both sides of the back support board 10, the back support board 10 is provided on the inner front edge of the left and right vertical rods 13, that is, on the inner front edge of each vertical rib 32. A deformation-permitting portion 33 for the back support substrate 10 that forms a gentle arcuate curved surface in which the distance from the rear surface of the back support substrate 10 gradually increases from the front end surface in contact with the rear surface toward the inside. It is provided continuously in the vertical direction.

By making the radius of curvature of the deformation allowing portion 33 gradually smaller from the upper portion toward the lower portion, the distance between the rear surface of the back support substrate 10 and the facing surface of the deformation allowing portion 33 is gradually increased upward. (See FIGS. 7 to 11).
Although illustration is omitted, the radius of curvature of the deformation allowing portion 33 is gradually increased from the upper portion toward the lower portion, and the separation dimension of the facing surface of the back surface of the back substrate 10 and the deformation allowing portion 33 is directed downward. May be gradually increased. In addition to the arcuate curved surface, the deformation-permitting portion 33 may have, for example, a parabolic surface whose radius of curvature gradually decreases toward the inside, or a partly flat inclined surface.

  In this way, the distance from the rear surface of the back support substrate 10 gradually increases from the front end surface in contact with the rear surface of the back support substrate 10 to the inner front edge of the vertical rib 32 in the left and right vertical rods 13. When the deformation allowance portion 33 is increased, when the back support substrate 10 is pressed rearward by the seated person's back, the left and right sides of the back support substrate 10 are elastically deformed rearward. The portion is also easily elastically deformed rearward along the deformation-permitting portion 33 with the front edge inside the vertical rod 13 as a fulcrum. Accordingly, a large difference in deformation amount between the center portion and both side portions of the back support substrate 10 is less likely to occur, and the entire back support substrate 10 is effectively elastically deformed rearward so that the seated person's back is comfortably supported. Become so.

  Further, since the deformation-permitting portion 33 has a gently curved shape, the backrest substrate 10 is easily elastically deformed rearward along the deformation-permissible portion 33 and is greatly bent on both sides of the backrest substrate 10. Since no stress is applied, the risk of wear of the rear surface in contact with the vertical rod 13 is reduced.

  Further, the radius of curvature of the deformation allowing portion 33 is gradually decreased from the upper portion toward the lower portion, and the separation dimension of the opposing surface of the back surface of the back substrate 10 and the deformation allowing portion 33 is gradually increased upward. Then, since both sides of the upper part of the back support substrate 10 to which a large back load is applied are elastically deformed rearward, the feeling when the backrest 6 is reclined and drowned is improved.

  On the contrary, the radius of curvature of the deformation allowing portion 33 is gradually increased from the upper portion toward the lower portion, and the separation dimension of the facing surface between the rear surface of the back support substrate 10 and the deformation allowing portion 33 is directed downward. When gradually becoming larger, when the seat is deeply seated in the back of the seat 5 and the backrest 6 is reclined in this state, the both sides of the lower portion of the backrest substrate 10 are moved backward. Since it is easily elastically deformed greatly, the vicinity of the waist is comfortably supported.

  On the outer side of each vertical rod 13 that is separated from the vertical rib 32, vertical ribs 34 and 34 that form the outer surface of the vertical rod 13 project forward so as to be parallel to the inner vertical rib 32. In this way, the left and right vertical rods 13 are provided on the front surface between the left and right vertical ribs 32, 34, with the hollow groove 35 facing the vertical direction and the concave groove 20 provided in parallel with each other, It has a forward saddle-shaped cross section. When the back support substrate 10 is mounted on the substrate support frame 9, the rear surfaces of both side portions of the back support substrate 10 are brought close to or in contact with the front end surfaces of the vertical ribs 32 and 34.

  As shown in FIGS. 2 to 4, the back support substrate 10 is curved in a substantially arc shape so that the central portion in the left-right direction protrudes rearward in plan view, and slightly below the central portion in the vertical direction in side view. Is substantially square when viewed from the front with substantially the same curvature as the substrate support frame 9, and by providing a large number of small holes 36 in the inner part excluding the upper, lower, left and right edges, The part is made easy to bend, and plugs 37, 37 that face in the vertical direction of the length reaching the vicinity of the upper and lower end portions of the back support substrate 10 are integrally formed rearward on the rear surfaces (back surfaces) of the left and right side portions. Projected to

Each insertion piece 37 has a pin insertion hole 38 facing in the left-right direction at a portion corresponding to the plurality of pin insertion holes 21 in each vertical rod 13 of the substrate support frame 9, and the through hole 24 in each vertical rod 13. The elastic engagement piece 39 which has the inward engagement claw 39a in the rear-end part is provided in the part corresponding to each.
A protrusion 37a having an arc shape in a side view with the center of curvature at the center of each pin insertion hole 38 is formed at the rear portion of each pin insertion hole 38 at the rear edge of each insertion piece 37.

  A pair of left and right protrusions 40, 40 parallel to each insertion piece 37 and having substantially the same vertical dimension are provided on the outer side of the left and right insertion pieces 37, 37 on the rear surface (back side) of the back board 10. Projecting integrally. The protruding dimension of the protrusion 40 toward the rear is slightly smaller than that of the insertion piece 37. An arc-shaped notch 40a is provided in a portion corresponding to the upper three pin insertion holes 38 in each protrusion 40 so as not to hinder the insertion of the pins.

As shown in FIGS. 5 and 6, a bent portion 10a that is gently bent toward the rear upper side is formed on the upper portion of the back support substrate 10, and a portion below the upper end on the rear surface of the bent portion 10a is formed at the upper portion. In a plan view and a rear view, the crescent shape is formed, and the vertical cross-sectional shape of the central portion in the left-right direction is a forwardly convex arc shape, and the rear surface is directed downward with an acute angle with respect to the rear surface of the bent portion 10a. The facing piece 41, the rearward piece 42 that extends rearward from the lower edge of the facing piece 41, and the hanging piece 43 that hangs down from the connecting portion between the lowering piece 41 and the backward piece 42 are integrally formed. Is provided.
The downward piece 41 and the backward piece 42 extend rearward from the upper rear surface of the back support substrate 10 so as to be spaced apart upward from the upper end of the substrate support frame 9, and the back support substrate 10 and the substrate A rear cover that covers the space above the support frame 9 and the substrate support frame 9 is formed.
The rear piece 42 also extends on the outer side in the left-right direction of the lower piece 41, and the rear end of the outer portion is integrated with the rear surface of the bent portion 10a.

At the rear end of both sides of the backward piece 42 that is spaced apart from the hanging piece 43, there is a forward piece 44a at the lower end, and the side plate 10 is locked to the substrate support frame 9 at each side. A downward engaging piece 44 is provided (see FIG. 6).
As shown in FIG. 12, the cross-sectional shape of the engagement piece 44 has a wedge shape that expands inward.

  A screw insertion hole 28 in the upper connecting portion 14 of the substrate support frame 9 and option member mounting holes 29 and 29 on both sides thereof, positioning holes 30 and 30, Boss insertion holes 45, 46, 46, 47, 47, 48, 48 corresponding to the stepped holes 31, 31 are provided.

  On the front surface of the hanging piece 43, a contact plate 49 serving as a reinforcing material made of a hard synthetic resin material is disposed. The rear surface of the abutting plate 49 corresponds to the boss insertion holes 45, 46, 46, 47, 47, 48, 48 in the hanging piece 43, and a plurality of bosses 50 facing rearward that can be fitted to them from the front, 51, 51, 52, 52, 53, 53 are provided integrally.

As shown in FIGS. 6 to 11, the left and right insertion pieces 37 are inserted into the left and right concave grooves 20 on the front surface of the substrate support frame 9 from the front, and the corresponding pin insertion holes 21 and pin insertion holes 38 are inserted. In a state of alignment, the pins 54 are inserted into the pin insertion holes 21 and the pin insertion holes 38 from both sides of the substrate support frame 9 (see FIG. 8), and the insertion pieces 37 are prevented from coming out of the concave grooves 20. Then, the elastic engagement piece 39 is fitted into the through hole 24, and the engagement claw 39a at the rear end is locked to the outer edge of the rear end of the through hole 24 (see FIG. 10). The bosses 50, 51, 51, 52, 52, 53, 53 of the contact plate 49 disposed on the front surface of the piece 43 are fitted into the boss insertion holes 45, 46, 46, 47, 47, 48, 48 in the hanging piece 43. And the bosses 52, 52, 53, 53 are connected to the upper connecting portion 14 of the substrate support frame 9. A set screw 55 that fits into the positioning holes 30 and 30 and the stepped holes 31 and 31 and is inserted through the stepped holes 31 from the rear is screwed into a female screw hole 56 provided in the boss 53 and tightened. (See FIG. 7), the back support substrate 10 is firmly and stably mounted on the front side of the substrate support frame 9.
The insertion piece 37, the pin 54, the elastic engagement piece 39, the projecting piece 24a, and the like constitute support means for supporting both side portions of the backrest board 10 on the left and right vertical rods 13 of the board support frame 9. doing.

  When each insertion piece 37 is inserted from the front into the left and right concave grooves 20 on the front surface of the substrate support frame 9, each arc-shaped protrusion 37 a at the rear end of the insertion piece 37 corresponds to the substrate support frame 9. By fitting into the through hole 23, each insertion piece 37 is positioned in the vertical direction with respect to the substrate support frame 9.

  As shown in FIGS. 2 and 3, the heads of the upper three pins 54 inserted into the pin insertion holes 21 from both sides of the substrate support frame 9 are connected to each other with a connecting rod 57 facing in the vertical direction, When each pin 54 is inserted into the pin insertion hole 21, the connecting rod 57 comes into contact with the outer surface of the substrate support frame 9 as shown in FIG. 8.

Although not shown, the two pins to be inserted into the lower pin insertion holes 21 on both sides of the substrate support frame 9 are also connected with the same connecting rod as the connecting rod 57, and the upper three pins 54 are connected. Similarly, it is preferable to insert into the pin insertion hole 21 below the substrate support frame 9.
Note that the lower portion of the back support substrate 10 can be securely attached to the substrate support frame 9 simply by locking the engagement claw 39a of the elastic engagement piece 39 to the outer edge of the rear end of the through hole 24. The insertion of the two lower pins into the pin insertion hole 21 may be omitted.

  As shown in FIGS. 4 and 10, the engagement claw 39 a of the elastic engagement piece 39 is provided with an engagement hole 39 b facing in the vertical direction, and the engagement claw 39 a is connected to the outer edge of the rear end of the through hole 24. When engaged with the engagement hole 39b, a rearward projecting piece 24a projecting from the outer edge of the rear end of the through hole 24 in the substrate support frame 9 is engaged, and the engagement claw 39a is It is desirable to be able to prevent the through hole 24 from coming inward from the outer edge of the rear end.

  As shown in FIGS. 2 to 4 and FIG. 6, downward engagement pieces 44 provided at the upper corners on the rear surface side of the back support substrate 10 are provided in the engagement holes 26 on both sides of the upper end of the substrate support frame 9. It is fitted from above and engaged with the front edge of the engagement hole 26, and the forward facing piece 44 a at the lower end of the engagement piece 44 can be engaged with the front edge of the lower end of the engagement hole 26. As a result, the left and right corners at the upper end of the back support substrate 10 can be prevented from peeling forward from the substrate support frame 9.

  Further, as shown in FIG. 5, when the back support substrate 10 is attached to the normal position of the substrate support frame 9, the backward piece 42 of the back support substrate 10 covers the upper end of the substrate support frame 9. To improve the appearance.

As shown in FIGS. 2 and 3, forward-facing pieces 59, 59 project from a portion slightly inward from both side ends of the front surface of the rear cover 12, and at a portion slightly below the upper end, A forward piece 60 that protrudes substantially horizontally toward the front and that has both end portions continuous with the upper ends of the left and right forward pieces 59 is provided. Dripping pieces 61 and 61 are provided on the front edges of the left and right sides of the forward piece 60.
As shown in FIG. 12, the front surface of the drooping piece 61 is inclined so that the outer side portion is located in front of the inner side in plan view so as to be parallel to the rear surface of the engagement piece 44, and has a cross-sectional shape. However, it has a backward U-shape that opens rearward.

On both sides of the lower portion of the front surface of the rear cover 12, a front-side fitting protrusion 62 corresponding to the through hole 24 in the substrate support frame 9 and a cylindrical shape corresponding to the upper and lower engagement holes 25, 25 are also provided. Engaging protrusions 63 and 63 are provided so as to protrude.
An outward locking claw 63 a is provided at the tip of each engagement protrusion 63.

  An oval shallow recessed step 64 that faces in the left-right direction is provided at the center of the upper portion of the rear surface of the rear cover 12 in the left-right direction. A screw insertion hole 65 is provided at the center of the recessed step 64. However, option member mounting holes 66, 66 are provided on both sides thereof.

  As shown in FIGS. 6 and 12, left and right hanging pieces 61 are inserted into the engagement holes 26 on both sides of the upper end of the substrate support frame 9 in which the engagement piece 44 of the back support substrate 10 is engaged with the front edge. As shown in FIG. 10, the engagement claw 39a of the elastic engagement piece 39 on the back support substrate 10 is located at the rear end, as shown in FIG. The left and right fitting protrusions 62 are fitted to the left and right through holes 24 of the board support frame 9 that are locked to the outer edge so that the outer surfaces of the fitting protrusions 62 are in contact with the inner surface of the elastic engagement piece 39. 9 and 11, each engagement protrusion 63 is fitted into the corresponding stepped hole 25 in the substrate support frame 9, and the locking claw 63 a is connected to the front end edge of the stepped hole 25. Further, as shown in FIGS. 5 and 7, from the rear of the rear cover 12, a screw insertion hole 65 and a base The rear cover 12 is attached to the board support frame 9 by screwing and tightening a set screw 67 through which the screw insertion holes 28 of the support frame 9 are sequentially inserted into a female screw hole 68 provided in the boss 50 of the contact plate 49. It is firmly and stably mounted on the rear surface.

  As shown in FIG. 8, in the state where the rear cover 12 is mounted on the substrate support frame 9, the connecting rods 57 that are integrated with the pins 54 are front and / or left and right forward pieces 59 on the left and right sides of the rear cover 12. And is prevented from falling off to the outside. Accordingly, the pin 54 is prevented from falling off and the back support substrate 10 is also prevented from falling off from the substrate support frame 9 without separately providing a dropping prevention means for preventing the pin 54 from dropping from the pin insertion hole 38. The In addition, the pins 54 can be used alone without connecting the plurality of pins 54 by the connecting rod 57, but in this case, each pin 54 is provided with an enlarged head, If the rear cover 12 can be pressed by the front surfaces on both sides, it can be prevented from falling off.

  Further, the left and right hanging pieces 61 are fitted into the engaging holes 26 on both sides of the upper end of the substrate support frame 9 in which the engaging piece 44 of the back support substrate 10 is engaged with the front edge as described above. As a result, the engagement piece 44 can be prevented from coming out of the engagement hole 26, and the left and right fitting protrusions 62 are connected to the engagement claws 39 a of the elastic engagement piece 39 on the back board 10. By fitting the left and right through holes 24 of the substrate support frame 9 locked to the outer edge as described above, the elastic engagement pieces 39 can be prevented from coming out of the through holes 24.

  A cap 69 that also serves as a name plate is detachably fitted to the recessed step 64 on the rear surface of the rear cover 12.

As shown in FIGS. 2, 3, 13, and 14, the above-described skin material 11 is formed of a woven fabric, a mesh fabric, or other upholstery material, and is a square that can cover the front surface (surface) of the back support substrate 10. An upper folded portion 11b formed by folding back to the rear side (back side) on the upper and lower edges and the left and right side edges of the planar portion 11a. The lower folded portion 11c and the left and right side folded portions 11d and 11d are configured to cover the outer peripheral end portion of the rear surface of the back support substrate 10 by these folded portions 11b, 11c and 11d.
The left and right dimensions of the skin material 11 before being attached to the back board 10 are substantially the same as or slightly smaller than the left and right dimensions of the back board 10, and the vertical dimension is smaller than the vertical dimension of the back board 10. is there.

  The upper folded portion 11b is made non-stretchable in the left-right direction by attaching an anti-stretch tape 70 made of synthetic resin, which is long in the left-right direction, to the back side thereof by sewing, bonding, welding, or the like. Further, on the back side of the lower folded portion 11c, a lower end portion of a strip-shaped stretch-preventing plate 71 that is made of a synthetic resin that cannot be expanded and contracted in the left and right direction is formed from an upper edge of the lower folded portion 11c. It is attached by sewing, adhesion, welding or the like so as to protrude upward. The stretch stopper tape 70 and the stretch stopper plate 71 also serve as reinforcing members that reinforce the upper folded portion 11b and the lower folded portion 11c, respectively.

  The left-right dimension of the stretch stop plate 71 is smaller than the separation dimension of the opposing surfaces of the left and right insertion pieces 37, 37 protruding from the rear surface of the back support substrate 10. Moreover, it is preferable that the stretch stop plate 71 has flexibility with a thickness of about 1 to 2 mm, for example. Contrary to the above, the stretch preventing tape 70 may be attached to the back side of the lower folded portion 11c, and the stretch stop plate 71 may be attached to the back side of the upper folded portion 11b.

  The side folded portions 11d, 11d are stretched and sewn so that they can be extended in the vertical direction, and a rubber band 72 that is long in the vertical direction is sewn on the back side of the portion. Thereby, the side part folding | returning parts 11d and 11d can be expanded-contracted to an up-down direction. In addition, it is preferable that the vertical dimension when the side folded portion 11d is extended to the maximum is substantially equal to or slightly larger than the vertical dimension of the back support substrate 10.

Next, how to attach the skin material 11 to the back support substrate 10 will be described.
As shown in FIG. 13, in the state where the planar portion 11 a of the skin material 11 is pressed against the front surface of the back support substrate 10, first, the upper folded portion 11 b of the skin material 11 is covered on the upper end portion of the back support substrate 10. The upper end portion and the rear surface above the rear piece 42 protruding from the rear surface of the substrate 10 are covered, and the upper side portions and the rear surface of the back substrate 10 are partially covered by the upper portions of the left and right side folded portions 11d and 11d. Cover.

  Next, as shown in FIG. 14, while extending the side folded portions 11 d and 11 d downward, the lower folded portion 11 c is placed on the lower end portion of the backrest member, covering the lower end portion and the rear surface of the backrest member, The side folded portions 11d and 11d cover both side portions of the back support substrate 10 and the rear surfaces of both side end portions that are continuous therewith. At this time, the ridges 40, 40 provided on both sides of the rear surface of the back support substrate 10 are also covered with the side folded portions 11d, 11d. Further, the stretch stop plate 71 attached to the lower folded portion 11 c is located between the insertion pieces 37, 37 on the rear surface of the back support substrate 10. Although the workability is slightly deteriorated, on the contrary, after the lower folded portion 11c is placed on the lower end portion of the back support substrate 10, the upper folded portion is extended while the side folded portions 11d and 11d are extended upward. You may make it cover 11b on the upper end part of the back support board | substrate 10. FIG.

  In this way, when the skin material 11 is attached to the back support substrate 10, the vertical middle portion of the back support substrate 10 is bent forward and the maximum extension dimension of the side folded portion 11d is set to the back support substrate. 10 is substantially equal to or slightly larger than the vertical dimension of the side portion 10, and the side folded portions 11 d and 11 d are spaced apart from the rear surfaces of both side portions of the backing substrate 10 as the portion facing the bent portion increases. Is formed with a gap capable of pressing the side folded portions 11d and 11d forward.

  In this way, when the backrest substrate 10 is attached to the substrate support frame 9 in the above-described manner with the skin material 11 attached to the backrest substrate 10, the left and right side portions are shown in FIGS. The rear surface of the folded portion 11d (only one is shown for left-right symmetry) is pressed forward toward the rear surface of the back support substrate 10 by the front end (front end) of the outer vertical rib 34 of the substrate support frame 9, A gap formed between the rear surface of the substrate 10 and the side folded portion 11d is closed. As a result, tension is applied to the side folded portion 11 d, the planar portion 11 a is pulled to the left and right sides, and the skin material 11 is tightly stretched on the backrest substrate 10.

  Further, both side portions of the skin material 11 are in close contact with both side portions of the back support substrate 10 to increase the frictional resistance, and the side folded portions 11d are provided on the rear surface of the back support substrate 10 and the vertical ribs of the substrate support frame 9. Therefore, it is possible to reliably prevent the outer side of the back support substrate 10 from coming off the outer side and the slack in the planar portion 11a.

Further, when the back support substrate 10 is attached to the substrate support frame 9, the inner end portion of the side folded portion 11 d is also connected to the tip end (rear end) of the protrusion 40 projecting from the rear surface of the side end portion of the back support member 10. ) And the front surface of the vertical rod 13 in the substrate support frame 9, and the side folded portion 11 d is clamped at two locations, the inner side and the outer side, and is shifted outward by the vertical ribs 34. There of being prevented, even less likely to come off the outer side of the spine rest substrate 10.

The upper folded portion 11b and the lower folded portion 11c are prevented from extending in the left-right direction by the stretch preventing tape 70 and the stretch preventing plate 71 attached thereto, so that when the side folded portion 11d is pressed. There is no fear that the tension is transmitted to the upper folded portion 11b and the lower folded portion 11c, and they are stretched simultaneously. Therefore, since the surface portion 11a of the skin material 11 is prevented from being squeezed over the entire circumference, it is possible to prevent the surface portion 11a from being loosened or wrinkled.
Further, when the back support substrate 10 is formed in a shape that is curved in a substantially arc shape so that the central portion in the left-right direction protrudes rearward in plan view as in the embodiment, the planar portion 11a of the skin material 11 is It does not occur that the seating comfort is worsened by being excessively separated from the front surface of the back support substrate 10.
Further, when the upper folded portion 11b and the lower folded portion 11c are prevented from extending in the left-right direction, the upper and lower ends of the planar portion 11a of the skin material 11 are rearward by the seated person's back during use of the chair. When pressed, the portions do not bend backwards excessively, and the back is comfortably supported.

Since the upper end portion of the rear cover 12 is in contact with or close to the rear surface of the upper rear portion of the upper folded portion 11b (see FIG. 5), it is not separated rearward from the rear surface of the back support board 10.
Further, since the front surface of the lower connecting portion 15 of the substrate support frame 9 is close to the rear surface of the stretch stop plate 71 attached to the lower folded portion 11c, the stretch stop plate 71 is rearward from the rear surface of the back support substrate 10. There is no separation.

As explained above, in the method for attaching the skin material and the chair of the above embodiment, the side folded portion 11d can be expanded and contracted in the vertical direction, so that the skin material 11 can be easily attached to the backrest substrate 10. And can be removed.
Further, the skin material 11 can be tightly stretched on the back support substrate 10 only by pressing the rear surface of the side folded portion 11d forward by the front surfaces of both side portions of the substrate support frame 9, and the side folded portion can be provided. The portion 11d is pinched by the tips of the vertical ribs 34 of the substrate support frame 9 and the protrusions 40 of the back support substrate 10, and is prevented from being displaced outward or detached from the back support substrate 10. Therefore, it is not necessary to apply any processing or the like for locking the skin material 11 to the back support substrate 10 and the skin material 11, or to use a tightening string or a special attachment means.

The present invention is not limited only to the above-described embodiment, and can be implemented in various modified modes as described below, for example, without departing from the scope of the claims.
(1) The method of attaching the skin material 11 of the present invention is applied to the substrate of the seat 5 supported by the upper surface of the support 7 and the substrate such as a headrest attached to the upper part of the backrest (both not shown).
When applied to the substrate of the seat 5, the intermediate portion in the front-rear direction of the substrate of the seat 5 is bent in a convex shape toward the upper surface side (surface side) in a side view, and the surface (upper surface) of this substrate is In addition to covering with the planar portion 11a of the skin material 11 similar to the above, the outer peripheral edge of the back surface (lower surface) of the substrate is covered with the folded portions 11b, 11c, and 11d, and the side folded portions 11d located on the left and right sides of the substrate. The lower surface of 11d may be pressed upward by the upper surface of both sides of the support 7 or the upper surfaces of both sides of the substrate support frame provided between the substrate 7 and the substrate.
(2) A cushion material is provided on the surface of the back support substrate 10 and the seat substrate, and the skin material 11 is attached to the substrate so as to cover the cushion material.
(3) Only the rear surface of the side folded portion 11 d facing the bent portion of the back support substrate 10 is pressed forward by the front surfaces on both sides of the substrate support frame 9.
(4) The side folded portion 11d is discontinuously clamped in the vertical direction by the ribs 34 and the protrusions 40.
(5) The lower portion of the back support substrate 10 is attached to the lower portion of the substrate support frame 9, that is, the lower connecting portion 15 by fixing means such as screws.
At this time, it is preferable that the lower folded portion 11 c and the expansion stopper plate 71 attached thereto are sandwiched between the rear surface of the back support substrate 10 and the front surface of the lower connecting portion 15 of the substrate support frame 9.
(6) The vertical rod 13 of the substrate support frame 9 is made solid without the vertical ribs 32, 34 and the concave groove 20, and the rear surfaces of the side folded portions 11d, 11d are directly pressed forward by the front surfaces of the left and right vertical rods 13. To do.
(7) Another non-stretchable skin material is fixed to the upper and lower edges of the planar portion 11a, and the upper folded portion 11b and the lower folded portion 11c formed by folding this skin material to the back side cannot be stretched. As a result, the stretch stop tape 70 and the stretch stop plate 71 are omitted.

DESCRIPTION OF SYMBOLS 1 Caster 2 Leg 3 Post 4 Leg 5 Seat 6 Backrest 7 Support body 8 Backrest support rod 8a Projection 9 Substrate support frame 10 Back support substrate 10a Bending portion 11 Skin material 11a Planar portion 11b Upper folding portion 11c Lower folding portion 11d side turn-up portion 12 rear cover 13 vertical rod 14 upper coupling portion 15 lower coupling portion 16 inclined rod 17 concave portion 18 front wall 19 bolt 20 concave groove 21 pin insertion hole 22 guide groove 23 through hole 24 through hole 24a protruding piece 25 Stepped hole 26 Engagement hole 27 Recessed stepped portion 28 Screw insertion hole 29 Optional member mounting hole 30 Positioning hole 31 Stepped hole 32 Vertical rib 33 Deformable portion 34 Vertical rib 35 Thickened concave groove 36 Small hole 37 Insertion piece 37a protrusion 38 pin insertion hole 39 elastic engagement piece 39a engagement claw 39b engagement hole 40 protrusion 40a notch 41 downward piece 42 backward piece 43 hanging piece 44 engagement piece 44 Boss insertion hole 49 Abutting plate 50, 51, 52, 53 Boss 54 Pin 55 Set screw 56 Female screw hole 57 Connecting rod 59, 60 Forward piece 61 Drooping piece 62 Fitting protrusion 63 Engaging protrusion 63a Locking claw 64 Recessed stepped portion 65 Screw insertion hole 66 Optional member mounting hole 67 Set screw 68 Female screw hole 69 Cap 70 Extension stopper tape 71 Extension stopper 72 Rubber band

Claims (11)

A substrate support frame supported by a leg or a support provided thereon, a substrate attached to the surface side of the substrate support frame, and a middle portion bent in a convex shape toward the surface side in a side view, and the substrate Of the skin material to the substrate in a chair provided with a skin material having a folded portion folded back on the back surface side, covering the outer periphery of the substrate and a part of the back surface continuous with the periphery of the planar portion covering the surface of the substrate Mounting method,
The folded portions on both the left and right sides of the skin material can be expanded and contracted in the longitudinal direction, and by extending the folded portions on the left and right sides, the skin material is covered on the substrate by the folded portions around the substrate. Next, at least the back surface of the part facing away from the bent part of the substrate at the folded part of the left and right side parts is projected to the surface side of the left and right side parts of the substrate support frame by the protrusions. A method of attaching a skin material to a board of a chair, wherein the board is attached to a board support frame by pressing toward the surface side.   The attachment method of the skin material to the board | substrate of the chair of Claim 1 which makes the folding | returning part of the part except the folding | returning part of the left-right both sides in a skin material impossible.   The attachment method of the skin material to the board | substrate of the chair of Claim 2 which makes that part non-stretchable by attaching an expansion | extension stop member to the folding | returning part of the part except the folding | returning part of the right-and-left both sides part in a skin material.   The method of attaching a skin material to a board of a chair according to claim 3, wherein the stretch preventing member is made of a stretch stop tape or a stretch stop plate made of synthetic resin.   The left and right sides of the substrate support frame are provided with ribs facing the longitudinal direction and projecting to the front surface side as projections, and the folded portions of the left and right sides are sandwiched between the tip of the ribs and the back surface of the substrate. The attachment method of the skin material to the board | substrate of the chair in any one of Claims 1-4.   On the inner side of the ribs of the substrate support frame, on the back surfaces of the left and right side portions of the substrate, there are provided longitudinal ridges protruding to the back surface side, and the left and right side portions are formed by the tips of the ridges and the surface of the substrate support frame. The method for attaching the skin material to the board of the chair according to claim 5, wherein the folded portion is clamped. A substrate support frame supported by a leg body or a support body provided on the leg body and having protrusions projecting to the surface side on both sides; and
A substrate attached to the surface side of the substrate support frame, and a substrate whose intermediate portion is bent convexly toward the surface side in a side view;
A planar portion that covers the surface of the substrate; and a folded portion that is connected to the periphery of the substrate and is folded back to the back surface so as to cover the outer periphery of the back surface of the substrate, and at least the left and right sides can be expanded and contracted. A skin material that is pressed toward the front surface side by a protrusion of the substrate support frame in a state where at least the back surface of the folded portion of the left and right sides of the folded portion is spaced apart from and opposed to the bent portion of the substrate. A chair characterized by comprising.   The chair according to claim 7, wherein an extension preventing member is attached to a folded portion of the skin material excluding the folded portions on both the left and right side portions so that the portion cannot be stretched.   The chair according to claim 8, wherein the stretch preventing member is made of a stretch stop tape or a stretch stop plate made of synthetic resin.   The folded portions of the left and right side portions are sandwiched between the front ends of the ribs as the protrusions and the back surface of the substrate, which are provided in the left and right side portions of the substrate support frame so as to face the longitudinal direction and protrude to the front side. The chair according to any one of claims 7 to 9. The front ends of the longitudinal ridges and the front surface of the substrate support frame are provided so that the folded portions on both the left and right side portions protrude inward from the back surfaces of the left and right side portions of the substrate on the inner side of the ribs of the substrate support frame. The chair according to claim 10, which is sandwiched between the two.

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