JP3457496B2 - Chair back structure - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a back structure of a chair, and more particularly to a back structure capable of exchanging upholstery.

[0002]

2. Description of the Related Art Conventionally, as a back structure of a chair in which the upholstery material can be replaced, a slide fastener (zipper) or a surface fastener (trade name "Velcro (registered trademark)" is provided in an opening of the upholstery material formed in a bag shape. Etc.), snaps, etc., which can be attached and detached, and the bag-shaped upholstery is put on the frame material with the pad material on the front surface to attach the frame material and the pad material to the upholstery. Wrap-in, the opening of the upholstery is hooked to the lower part of the frame material by the above-mentioned hooking member, or only the both side parts and the central part of the lower end of the frame material that is connected to the leg are external from the opening of the upholstery. There is generally known a structure in which the opening is closed by the hooking member while being exposed to the outside.

However, in such a structure, since almost the entire frame material is wrapped in the bag-shaped upholstery, it is troublesome to attach and detach the upholstery and the upholstery is easily soiled or damaged. was there.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a back structure that advantageously solves the above problems. The chair back structure of the present invention is a frame member. And the pad material provided on the front surface of the frame material and the upholstery material covering the front surface of the pad material, the frame material is detachably attached to the back plate and the front surface of the back plate. And a core plate for supporting the pad material, and engaging portions are provided at upper and lower end portions and both side portions of the upholstery fabric, and upper and lower end portions and both side portions of the core plate of the frame material are provided. , A hooking portion that is separably hooked onto the hooking portion is provided at a position corresponding to each hooking portion of the upholstery, and the hooking portion of the upholstery has hooking holes that are fixed to the upholstery. It shall consist of one piece and the front The engaging portion of the frame material comprises an engaging projection provided on the core plate of the frame material and engaging with the engaging hole of the engaging piece, and the upholstery is formed of the core plate of the frame material and the pad material. It is characterized in that the respective engaging pieces of the upholstery and the engaging protrusions of the core plate of the frame material are engaged with each other by covering them from the front side thereof.

According to such a back structure of the chair, the upper and lower end portions of the upholstery material and the respective engaging portions of both side portions are separated from the upper and lower end portions of the frame material and the respective engaging portions of both side portions so that the upholstery material is in front of the frame material. The upholstery can be removed from the frame material by removing it in the direction of the frame material. Since the upholstery can be attached to the frame material by engaging with the respective engaging portions of the section and both side portions, the upholstery can be easily attached and detached in a short time.

Further, according to the back structure of the chair, since the upholstery material hardly covers the rear surface side of the frame material, it is possible to reduce the chance that the upholstery material is soiled or damaged.

Further, in the chair back structure of the present invention, as described above, the frame member is provided with a back plate and a core plate detachably mounted on the front surface of the back plate to support the pad member. The engaging portions of the frame member are provided on the upper and lower end portions and both side portions of the core plate.

According to the frame member including the back plate and the core plate, since the back plate and the core plate are both plate materials, the core plate can be easily attached to and detached from the back plate. Can be removed in the front direction and moved to a place where it is easy to work, and the upholstery can be removed from the core plate there. Conversely, after attaching the upholstery to the core plate at a place where it is easy to work, attach the core plate to the back plate Therefore, the upholstery can be easily attached and detached in a shorter time.

Further, in the back structure of the chair of the present invention, as described above, the engaging portion of the upholstery comprises an engaging piece having an engaging hole fixed to the upholstery, and the engaging portion of the frame member comprises: The frame member is composed of a hooking protrusion that is hooked with the hooking hole of the hooking piece.

According to the engaging portion including the engaging piece and the protrusion, the engaging separation can be easily performed, and the engaging material and the frame material can be easily provided.

In the back structure of the chair of the present invention, the engaging piece of the upholstery material may be made of soft synthetic resin and have constricted portions on the left and right.

According to the engaging piece made of such a soft synthetic resin,
Since it fits easily in the shape of a finger, it can be easily grasped and pulled by hand, so that the frame material can be easily separated from the engagement part, and since the sewing machine needle passes through, it can be sewn on upholstery. Therefore, it can be easily provided on the upholstery.

If the engaging piece made of soft synthetic resin has constricted portions on the left and right, it can be pulled by twisting and twisting by hand, so that the engaging piece can be more easily pulled from the engaging portion of the frame material. It can be separated.

Further, in the back structure of the chair of the present invention, a protrusion which is adjacent to the engaging projection of the frame member and allows the engaging piece to slightly float from the frame member by contact with the engaging piece of the upholstery material. May be provided.

If such a protrusion is provided and the engaging piece of the upholstery material is slightly floated from the frame material, the engaging piece of the upholstery material can be easily picked up by hand and pulled. The hooking piece can be more easily separated from the part.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will now be described in detail with reference to the drawings by way of examples. Figure 1
FIG. 2 is an exploded perspective view showing an embodiment of a back structure of a chair of the present invention, FIG. 2 is a perspective view showing an entire chair having the back structure of the embodiment, and FIG. 3 is a back structure of the embodiment. 4 is a plan view showing a hooking piece forming a part of FIG. 4, FIG. 4 is a longitudinal sectional view taken along the line IV-IV of FIG. 2, showing a part of the back structure of the embodiment, and FIG. 2 shows a portion of the back structure of FIG.
FIG. 6 is a cross-sectional view taken along line VV of FIG. 6 and FIG. 6 is a rear view showing a core plate to which upholstery is attached, which constitutes a part of the back structure of the embodiment.

The chair shown in FIG. 2 constitutes one seat of a seat stand upright connecting chair for a theater, and is arranged between two legs 1 and those legs 1. A seat portion 2 whose both sides are rotatably supported by the leg portion 1, and a back portion 3 which is arranged between the two leg portions 1 and whose both side portions are fixedly supported by the leg portions 1. , An elbow rest 4 fixed to the upper end of each of the two leg portions 1, and the seat portion 2 here is always standing up by a spring (not shown) arranged inside the seat portion 2. (However, in order to make the shape of the chair easy to see, the chair is shown in the lowered position).

As shown in FIG. 1, the back portion 3 here is a frame member having a back plate 8 made of a hard synthetic resin and a core plate 9 also made of a hard synthetic resin which is detachably mounted on the front surface thereof. 5, a pad material 6 (partially cut away in FIG. 1) made of a soft urethane resin that is fixed to and supported by the front surface of the core plate 9 of the frame material 5, and the front surface of the pad material 6. And a sewn upholstery 7 covering the sewn tail, and the upper and lower ends and both sides of the upholstery 7 are
An engaging piece 10 made of soft synthetic resin is provided as an engaging portion. In this embodiment, two engaging pieces 10 are provided on the upper and lower ends of the upholstery 7, and five engaging pieces 10 are provided on both left and right sides of the upholstery 7, as shown in FIG.

As shown in FIG. 3, the engaging piece 10 has constricted portions 10a formed on the left and right side portions thereof, and the constricted portion 10a.
From a, one side (upper side in the figure) is formed into a substantially circular shape, and the other side (lower side in the figure) is formed into a substantially rectangular shape. Hanging hole 10
b is formed. And, here, the engaging piece 10 is provided on the upholstery fabric 7 by sewing the end portion of the rectangular portion to the upholstery fabric 7 with the sewing thread 10c.

Further, at the positions corresponding to the respective engaging pieces 10 of the upholstery 7 on the upper and lower end portions of the core plate 9 of the frame member 5 and on the back side of both sides thereof, as shown in FIG. 1 and FIG. 4 and FIG. As shown, an L-shaped engaging protrusion 9a as an engaging portion that is inserted into the engaging hole 10b of the engaging piece 10 and is detachably engaged therewith.
Is integrally formed with the plate-shaped portion of the core plate 9 so as to project inward in the back direction (however, in FIG. 1, as a representative, the lower end portion of the core plate 9 and the engaging projections 9a on one side thereof are shown. Only shown).

In addition, at the position of the core plate 9 corresponding to the circular portion of the engaging piece 10 engaged with each engaging protrusion 9a, as shown in FIGS. A protrusion 9b that abuts and floats the circular portion slightly from the flat plate-shaped portion of the core plate 9 is formed integrally with the plate-shaped portion of the core plate 9 so as to project in the rear direction.

Further, as shown in FIGS. 1 and 4, a U-shaped projection 9c extends horizontally on the rear side of the upper end of the core plate 9 of the frame member 5 so as to project rearward. Is integrally formed with the plate-shaped portion of the core plate 9 and
An L-shaped engaging projection 9d is integrally formed with the plate-shaped portion of the core plate 9 so as to project upward in the front direction on the front side of the lower end of the frame member 5 On the front side of the upper end of the back plate 8 of the above, a hooking alloy tool 11 having an L-shaped cross section that engages with the above-mentioned U-shaped projection 9c is fixed so that one side thereof projects upward and extends horizontally. On the front side of the lower end of the back plate 8, a U-shaped metal fitting 12a that engages with the L-shaped engagement projection 9d is pulled by a lever 12b via a toggle mechanism and a coil spring (latch).
12 is installed.

When removing the upholstery material 7 in such a back structure, first put a hand on the lower side of the back part 3 and raise the lever 12b of the latch 12 forward so that the latch 12 has a U-shaped metal fitting.
By removing 12a from the engaging projection 9c at the lower end of the core plate 9 and lifting the core plate 9 upward to the front side, the U-shaped projection 9c of the core plate 9 is made into the L-shaped hooking alloy tool 11 of the back plate 8. And the core plate 9 is removed from the back plate 8. As a result, the core plate 9 can be moved to a place where it is easy to work, and the upholstery material 7 can be removed from the core plate 9 there. Next, as shown in FIG. 6, the core plate 9 is placed with the back side facing upward, and the engaging pieces 10 are removed from the upper and lower end portions of the core plate 9 and the engaging protrusions 9a on the left and right side portions.

At this time, since the circular portion of the engaging piece 10 is slightly floated by the protrusion 9b provided on the core plate 9,
By pulling the engaging piece 10 in the rear direction while pinching the circular portion with a finger and twisting it, the rectangular portion of the engaging piece 10 is floated from the plate-like portion of the core plate 9 and the engaging piece 10 can be easily removed from the engaging protrusion 9a. You can After that, by pulling out the core plate 9 while expanding the end portion of the upholstery material 7 surrounding the end portion of the core plate 9, the upholstery material 7 can be removed from the core plate 9.

When the upholstery material 7 is attached, contrary to the above, first, the upholstery material 7 is covered from the front side of the core plate 9 provided with the pad material 6 on the front surface, and each engaging piece 10 is attached. By attaching the upholstery 7 to the core plate 9 by engaging each of the engagement protrusions 9a with each other, and then applying the core plate 9 to the back plate 8 from the front side thereof to form a U-shaped protrusion of the core plate 9. 9c is engaged with the L-shaped hooking alloy tool 11 of the back plate 8 from above, and then a hand is put on the lower side of the back part 3 to attach the U-shaped metal fitting 12a of the latch 12 to the hooking projection 9c of the lower end of the core plate 9. The lower end of the core plate 9 is fixed to the back plate 8 by the latch 12 by lowering the lever 12b of the latch 12 downward.

Therefore, according to the back structure of this embodiment, the upholstery material 7 can be easily attached and detached in a short time, and since the upholstery material 7 does not cover the back side of the back plate 8 at all, It is possible to reduce the chance that the ground 7 gets dirty or damaged.

Further, according to the back structure of this embodiment, the frame member 5 is provided with the back plate 8 and the core plate 9 which is detachably mounted on the front surface thereof and supports the pad member 6. Since both 8 and the core plate 9 are plate materials, the core plate 9 can be easily attached to and detached from the back plate 8. Therefore, as described above, the core plate 9 is removed from the back plate 8 and moved to a place where it is easy to work. Therefore, since the upholstery material 7 can be attached to and detached from the core plate 9,
The upholstery material 7 can be easily attached and detached in a shorter time.

Further, according to the back structure of this embodiment, the engaging portion of the upholstery material 7 is fixed to the upholstery material 7, and the engaging hole is formed.
It is composed of a hooking piece 10 having 10a, and the hooking portion of the core plate 9 is formed by a hooking protrusion 9a provided in the hooking hole 10a of the hooking piece 10 so that the hooking separation between them is easy. In addition to the above, the engaging portions thereof can be easily provided on the upholstery material 7 and the core plate 9.

Further, according to the back structure of this embodiment, the engaging piece 10 of the upholstery material 7 is made of a soft synthetic resin having the constricted portions 10a on the left and right, and therefore, it is easy to adapt to the shape of the finger. Since it can be easily picked and pulled by hand, the engaging piece 10 can be easily separated from the engaging protrusion 9a of the core plate 9, and moreover, it can be pulled while twisting and twisting by hand. The separation of the engaging piece 10 can be performed more easily. Further, since the sewing machine needle is passed through, the sewing machine can be easily provided on the upholstery cloth 7 by sewing it.

According to the back structure of this embodiment, the engaging piece 10 of the upholstery material 7 is formed on the core plate 9 adjacent to the engaging projection 9a.
Since the projection 9b for slightly floating the engaging piece 10 from the core plate 9 by abutting against the
10 can be easily picked and pulled by hand, therefore
The engaging piece 10 can be more easily separated from the engaging protrusion 9a of the core plate 9.

Although the present invention has been described above based on the illustrated example, the present invention is not limited to the above-mentioned example. For example, the back center of the upholstery fabric 7 and the front center of the pad material 6 are hooked together. A hook-and-loop fastener may be further provided to prevent the center portion of the upholstery material 7 from being lifted up from the center portion of the pad material 6. Further, instead of the latch 12, another retaining member such as a rubber band may be provided to fix the lower end of the core plate 9 to the lower end of the back plate 8. Further, in the above embodiment, two engaging portions are provided at the upper and lower end portions, and five engaging portions are provided at the left and right end portions, but the number of engaging portions is not limited to this.
The back structure of the above embodiment is used for the connecting chair for the theater, but the back structure of the present invention can of course be used for other types of chairs. .

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a back structure of a chair according to the present invention.

FIG. 2 is a perspective view showing an entire chair including the back structure of the above embodiment.

FIG. 3 is a plan view showing a hooking piece which constitutes a part of the back structure of the embodiment.

4 is a part of the back structure of the above embodiment IV-of FIG.
FIG. 4 is a vertical sectional view taken along line IV.

FIG. 5 is a V- of FIG.
It is a cross-sectional view along the line V.

FIG. 6 is a rear view showing a core plate to which a upholstery material is attached, which constitutes a part of the back structure of the embodiment.

[Explanation of symbols]

1 leg 2 seats 3 back 4 Elbow pads 5 frame materials 6 pad material 7 upholstery 8 core plate 9 backboard 9a Hanging protrusion 9b protrusion 9c protrusion 9d hanging protrusion 10 hanging pieces 10a Constriction section 10b hanging hole 10c sewing thread 11 hanging alloy tool 12 stakes 12a metal fittings 12b lever

Claims (3)

(57) [Claims] 1. A back member of a chair, comprising: a frame member ; a pad member provided on a front surface of the frame member; and an upholstery cloth covering the front surface of the pad member . Removed on the front of its backboard
A core plate that is mounted so as to support the pad material.
Shall become Te, provided with a fitting part to the lower part and both sides on the upholstery, the upper and lower end and both sides of the core plate of said frame member, at a position corresponding to each engagement portion of the upholstery , A hooking portion that is separably hooked on the hooking portion, and the hooking portion of the upholstery is fixed to the upholstery.
Consisted of lock plate having a hole, the fitting part of said frame member, said core plate of the frame member
Is it a hooking protrusion that is provided on the hook and that engages with the hooking hole of the hooking piece?
And covering the core plate of the frame material and the pad material from the front side of the core plate and the pad material of the frame material to form the engaging pieces of the cloth and the core plate of the frame material. characterized in that by engagement with said respective engaging collision portion, a chair back structure. Lock plate according to claim 2, wherein said upholstery is characterized by having a constricted portion in the left and right be of made of soft synthetic resin, the back structure of claim 1, wherein the chair. 3. The core plate of the frame member is provided with a protrusion adjacent to the engaging protrusion, which allows the engaging member to slightly contact the engaging member to float the engaging member slightly from the frame member. Claim 1 or 2 characterized by the above.
Back structure of the stated chair.