chair

Abstract

A chair having a configuration that allows suitable provision of recessed grooves that contribute to the formation of a good appearance of the chair is provided. [Solution] The chair has a backrest D, which is a support part that supports a seated person, and is equipped with a first internal cushion material 1, a second internal cushion material 2, and a bag-shaped cover material 6 that covers the first and second internal cushion materials 1 and 2. The cover material 6 has one tooth f1 that constitutes a zipper F arranged on its inner surface and has a tooth holding mechanism 4 for the other tooth provided inside, and by using a slider S that constitutes the zipper F to connect the one and the other teeth f1 and f2 together, a recessed groove W is formed in the cover material 6 between the first and second internal cushion materials 1 and 2.

Description

[Technical Field]

[0001] The present invention relates to a chair. [Background technology]

[0002] Conventionally, massage chairs have been known that have a mat with cushioning material between upper and lower cloths, with a bent portion on the mat, and the upper cloth of the bent portion on the mat is pulled toward the mat base located on the opposite side (see, for example, Patent Document 1).

[0003] In this massage chair, a mat is prepared in advance, with the cushion material wrapped between upper and lower cloths, and the outer side of the mat is pulled toward the mat base located on the opposite side.

[0004] However, with such a structure, the shape of the bent portion is entirely dependent on the basic structure of the mat, which makes it difficult to design a suitable appearance. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2000-350759 Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention has been made in light of the above circumstances, and aims to provide a chair having a configuration that allows for the appropriate provision of groove portions that contribute to at least creating a good appearance for the chair. [Means for solving the problem]

[0007] That is, the present invention has the following configuration.

[0008] The invention described in claim 1 is a floor-standing chair equipped with a support part for supporting a seated person, the support part being either a seat or a backrest, the support part comprising a first internal cushion material, a second internal cushion material provided adjacent to the first internal cushion material, and a bag-shaped cover material covering the first and second internal cushion materials, the cover material having one of the teeth constituting a zipper arranged on an inner surface portion corresponding to the boundary between the first internal cushion material and the second internal cushion material, the cover material having a second tooth holding mechanism whose base end is supported by the cover material or another member provided inside the cover material and whose tip end is provided with the other tooth constituting the fastener, and a slider constituting the fastener is used to connect the one and the other teeth together, thereby forming a recessed groove in the cover material between the first and second internal cushion materials.

[0009] The invention described in claim 2 is the chair described in claim 1, wherein the other tooth holding mechanism is disposed between the first inner cushion material and the second inner cushion material.

[0010] The invention described in claim 3 is a chair described in claim 2, in which the other tooth holding mechanism comprises a sheet-shaped intermediate base material and the other tooth provided at the tip of this intermediate base material.

[0011] The invention described in claim 4 is the chair described in claim 3, wherein the other member is a plate-like member, and the base end of the intermediate base material is attached to this plate-like member.

[0012] The invention described in claim 5 is a chair described in claim 3, which is provided with an undercoat material arranged inside the covering material and covering the first and second internal cushion materials, and the other component is the undercoat material, and the base end of the intermediate base material is attached to this undercoat material.

[0013] The invention described in claim 6 is the chair described in claim 4, wherein the support part is the backrest, the one of the teeth is arranged on the inner side of the front part of the cover material arranged in front of the first and second internal cushion materials, and the plate-like member is attached to the back of the first and second internal cushion materials.

[0014] The invention described in claim 7 is the chair described in claim 6, wherein the first and second internal cushion materials each have approximately the same width dimension extending in the left-right direction, the second internal cushion material is arranged below the first internal cushion material, and the groove portion extends in an approximately horizontal straight line between both side ends of the front portion of the backrest.

[0015] The invention described in claim 8 is the chair described in claim 1, 2, 3, 4, 5, 6 or 7, wherein the floor-standing chair is a sofa-type chair that extends laterally so that multiple people can sit side by side at the same time. [Effects of the Invention]

[0016] As described above, according to the present invention, it is possible to provide a chair having a configuration that allows suitable provision of recessed grooves that contribute to at least forming a good appearance of the chair. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is an overall perspective view for explaining an embodiment of the present invention; [Figure 2] FIG. 2 is a schematic end view of the support portion (backrest) in the same embodiment, cut at a middle portion in the left-right direction. [Figure 3] FIG. 3 is a schematic end view illustrating a skin material in the same embodiment, cut at a middle portion in the left-right direction. [Figure 4] FIG. 1 is a schematic end view cut at the middle portion in the left-right direction to explain the internal structure (the internal structure consisting of the first internal cushion material, the second internal cushion material, the plate-shaped member, the other tooth holding mechanism, and the undercoat material) housed inside the covering material in this embodiment. [Figure 5] FIG. 6 is a schematic end view illustrating a step of forming a recessed groove portion in the skin material in the embodiment. [Figure 6] FIG. 6 is a schematic end view illustrating a step of forming a recessed groove portion in the skin material in the embodiment. [Figure 7] FIG. 6 is a schematic end view illustrating a step of forming a recessed groove portion in the skin material in the embodiment. [Figure 8] FIG. 3 is a schematic end view corresponding to FIG. 2 in another embodiment. [Figure 9] FIG. 3 is a schematic end view corresponding to FIG. 2 in another embodiment. [Figure 10] FIG. 10 is an overall perspective view for explaining another embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0018] Hereinafter, one embodiment of the present invention will be described with reference to FIGS.

[0019] 2 to 7 are schematic end views for explaining the structure of the backrest D, which is the support portion, and the process of forming the recessed groove portion W in the backrest D. As shown in FIG.

[0020] In this embodiment, the present invention is applied to a sofa-type chair (hereinafter simply referred to as a "chair"), which is a floor-standing chair. A sofa-type chair extends horizontally so that multiple people can sit side by side at the same time.

[0021] The chair has legs A, a support structure B supported by the legs A, multiple or three seats C supported by the support structure B, and multiple or three backrests D, which are supports arranged at the rear of each seat C.

[0022] <<Legs A>> The legs A are arranged at four locations in total, at least on the left and right sides of the front and on the left and right sides of the rear. The legs A extend in the vertical direction. The lower ends of the legs A are in contact with the floor. The legs A are made, for example, from cylindrical metal pipe material.

[0023] <<Support structure B>> The support structure B is composed of multiple metal frames to provide the rigidity necessary to support the seat C and backrest D. The support structure B is horizontally oriented and has a horizontally elongated rectangular shape. The support structure B includes a pair of front and rear horizontal frames b1 extending in the width direction, left and right vertical frames b2 connecting the left and right end portions of the front and rear horizontal frames b1, and a reinforcing frame (not shown) connecting the longitudinal middle portions of the front and rear horizontal frames.

[0024] <<Location C>> The seat C is mainly composed of a rectangular block-shaped internal cushion body (not shown) wrapped in a seat covering material c1. Three seats C are arranged side by side in the left-right direction on the support structure B.

[0025] <<Backrest D>> The backrests D are arranged in an upright position at the rear of each of the three seats C. Each of the three backrests D has a substantially identical structure. Although not shown in detail, the three backrests D are supported by a support structure D.

[0026] The backrest D comprises a first internal cushion material 1, a second internal cushion material 2 placed adjacent to and below the first internal cushion material 1, a plate-like member 3 in an upright position attached to the back side of each of the first and second internal cushion materials 1, 2, the other tooth holding mechanism 4 having its base end attached to the front side of the plate-like member 3, an underlayment material 5 covering the plate-like member 3 and the first and second internal cushion materials 1, 2, and a skin material 6 covering the internal structure da including the first and second internal cushion materials 1, 2.

[0027] Each component of the backrest D will be described below.

[0028] <First internal cushioning material 1> The first internal cushion material 1 is a block made of a material capable of exhibiting cushioning properties. The first internal cushion material 1 extends in the left-right direction as a whole. The first internal cushion material 1 is generally trapezoidal in side view. The first internal cushion material 1 has a front surface that slopes upward so that it is gradually positioned rearward, and a back surface that extends generally vertically upward. The first internal cushion material 1 has a bottom surface that extends generally horizontally, and an upper surface that is generally horizontal or curved so as to be convex upward in side view.

[0029] <Second internal cushioning material 2> The second internal cushion material 2 is a block made of a material that can exhibit cushioning properties. The second internal cushion material 2 extends in the left-right direction. The second internal cushion material 2 is generally trapezoidal in side view. The front surface of the second internal cushion material 2 is inclined so that it is positioned gradually rearward as it extends upward, and the back surface extends generally vertically as it extends upward. The bottom surface of the second internal cushion material 1 extends generally horizontally, and the top surface also extends generally horizontally.

[0030] The second internal cushion material 2 is disposed below the first internal cushion material 1. The dimension of the second internal cushion material 2 in the front-to-rear direction is set to be larger than the dimension of the first internal cushion material 1 in the front-to-rear direction. The dimension of the second internal cushion material 2 in the up-to-down direction is set to be larger than the dimension of the first internal cushion material 1 in the up-to-down direction.

[0031] The first and second internal cushion materials 1 and 2 extend in the left-right direction and have approximately the same width.

[0032] <Plate-shaped member 3> The plate-like member 3 serves to position the first and second internal cushion materials 1, 2. The plate-like member 3 is a single, approximately rectangular member that stands upright. The plate-like member 3 is attached to the back surfaces of the first and second internal cushion materials 1, 2 to position them.

[0033] The base end of an intermediate base material 41 constituting the other coupling tooth holding mechanism 4 is attached to the front surface of the plate-like member 3 at the vertically intermediate portion thereof by an appropriate method.

[0034] <Other tooth holding mechanism 4> The other tooth holding mechanism 4 extends in the front-to-rear direction. The other tooth holding mechanism 4 has the other tooth f2 constituting the zipper F at its tip (front end) so as to extend in the left-to-right direction. The other tooth f2 constitutes the zipper F together with one tooth f1 and a slider S, which will be described later.

[0035] The other tooth holding mechanism 4 has its base end (rear end) supported on the front side of the plate-shaped member 3. The other tooth holding mechanism 4 is disposed so as to extend forward from the plate-shaped member 3. The other tooth holding mechanism 4 is disposed between the first and second internal cushion materials 1 and 2, which are wrapped in an underlayment material 5.

[0036] The other tooth holding mechanism 4 comprises an intermediate base material 41 made of a sheet-like cloth material extending in the front-to-back and left-to-right directions, and the other tooth f2 arranged at the tip of the intermediate base material 41 so as to extend in the left-to-right direction.

[0037] The other tooth holding mechanism 4 is disposed between the first inner cushion material 1 located above and the second inner cushion material 2 located below.

[0038] <Underlay material 5> The underlayment material 5 is used to position the first and second inner cushion materials 1 and 2 relative to the plate-like member 3.

[0039] The undercovering material 5 is arranged to cover the plate-like member 3, the first internal cushion material 1, and the second internal cushion material 2, but not to cover the other tooth holding mechanism 4 arranged between the first internal cushion material 1 and the second internal cushion material 2. In other words, the undercovering material 5 is arranged so that it covers the first and second internal cushion materials 1 while exposing the other tooth f2.

[0040] The edge portions (upper and lower edge portions) of the undercoat material 5 are fastened to the front surface of the plate-like member 3 at the vertical middle portion using a hook-and-loop fastener M as a connecting means.

[0041] <Skin material 6> The skin material 6 is made of fabric and can cover from the outside the internal structure da, which is made up of the first and second internal cushion materials 1 and 2, the plate-like member 3, the other tooth holding mechanism 4, and the underlayment material 5, so that it cannot be seen from the outside. The skin material 6 has one tooth f1 that constitutes the zipper F disposed inside.

[0042] The covering material 6 is bag-shaped and has an opening 6k formed at the bottom for inserting the internal structure da. The covering material 6 can accommodate the internal structure da, i.e., the first and second internal cushion materials 1 and 2, the plate-like member 3, the other tooth holding mechanism 4, and the underlay material 5, through the opening 6k.

[0043] The skin material 6 has one tooth f1 of the zipper F disposed on an inner surface portion corresponding to the boundary between the first inner cushion material 1 and the second inner cushion material 2 in the vertical direction at the front portion.

[0044] One of the teeth f1 is disposed so as to extend horizontally in the left-right direction on the inner surface of the front part of the skin material 6. One of the teeth f1 is disposed on the inner surface side of the front part of the skin material 6 located in front of the first and second internal cushion materials 1, 2.

[0045] <Regarding the pull-in structure of the front part of the cover material 6 for forming the recessed groove portion W in the cover material 6 using the fastener F> The process of forming the grooves W in the cover material 6 of the backrest D will be described with particular reference to FIGS.

[0046] First, as shown in FIG. 5, an internal structure da to be disposed inside and a skin material 6 with the lower opening 6k open are prepared.

[0047] Next, as shown in FIG. 6, the upper part of the internal structure da is inserted so that it is positioned deep inside the skin material 6, and the internal structure da and the skin material 6 are aligned so that one tooth f1 and the other tooth f2 that constitute the fastener F are close to each other.

[0048] 7, the user inserts his / her hand inside through the opening 6k and slides the slider S that constitutes the fastener F to connect (engage) the adjacent teeth f1 and f2. As a result of using the slider S that constitutes the fastener F to connect one tooth f1 provided on the cover material 6 and the other tooth f2 provided on the other tooth holding mechanism 4, the front part of the cover material 6 to which one tooth f1 is attached is pulled backward, i.e., into the gap between the first internal cushion material 1 and the second internal cushion material 2.

[0049] In other words, after the slider S of the zipper F is slid to complete the connection (engagement) of the teeth f1, f2 with each other, a groove W extending in the left-right direction and recessed rearward is formed in the front part of the cover material 6 at a position corresponding to the space between the first and second internal cushion materials 1, 2. The groove W extends in a substantially horizontal straight line between both side ends of the front part of the backrest D, and plays a role in creating a favorable appearance.

[0050] After the coupling step of the coupling teeth f1 and f2 by the slider S shown in FIG. 7 is completed, the opening 6k is closed, resulting in the configuration shown in FIG.

[0051] As described above, the chair according to this embodiment is a floor-standing type chair that includes a backrest D that is a support portion that supports a seated person.

[0052] The backrest D comprises a first internal cushion material 1, a second internal cushion material 2 disposed adjacent to the first internal cushion material 1, and a bag-shaped covering material 6 that covers the first and second internal cushion materials 1 and 2.

[0053] The skin material 6 has one tooth f1 that constitutes a zipper F disposed on an inner surface portion corresponding to the boundary between the first internal cushion material 1 and the second internal cushion material 2, and is provided with a second tooth holding mechanism 4 whose base end is supported by a plate-like member 3, which is another member, and whose tip end is provided with the other tooth f2 that constitutes the fastener F. A slider S that constitutes the fastener F is used to connect the one and the other teeth f1, f2 together, thereby forming a groove portion W in the skin material 6 between the first and second internal cushion materials 1, 2.

[0054] Therefore, this embodiment can provide a chair having a configuration that can suitably provide the recessed groove portion W that contributes to forming a good appearance of the chair.

[0055] The other tooth holding mechanism 4 is disposed between the first inner cushion material 1 and the second inner cushion material 2 .

[0056] Therefore, by utilizing the configuration of the fastener F, that is, the mechanism of connecting one tooth f1 and the other tooth f2 by sliding the slider S, one tooth f1 can be suitably drawn between the first internal cushion material 1 and the second internal cushion material 2.

[0057] The other tooth holding mechanism 4 includes a sheet-shaped intermediate base material 41 and the other tooth f2 provided at the tip of the intermediate base material 41.

[0058] Therefore, the other tooth holding mechanism 4 has a suitable configuration that allows it to be easily disposed between the first inner cushion material 1 and the second inner cushion material 2.

[0059] The base end of the other tooth holding mechanism 4 is supported by a plate-like member 3 which is another member, and the base end of an intermediate base material 41 is attached to the plate-like member 3 .

[0060] Therefore, the base end of the intermediate base material 41 , which is the base end of the other tooth holding mechanism 4 , is configured to be stably supported by the plate-like member 3 .

[0061] One of the teeth f1 is disposed on the inner side of the front portion of the skin material 6 disposed in front of the first and second internal cushion materials 1 and 2, and the plate-like member 3 is attached to the back surfaces of the first and second internal cushion materials 1 and 2.

[0062] For this reason, one coupling tooth f1 is disposed in a suitable location so that it can be connected to the other coupling tooth f2 provided on the other coupling tooth holding mechanism 4. In addition, the plate-like member 3 is attached to the back surfaces of the first and second internal cushion materials 1, 2, so that the first and second internal cushion materials 1, 2 can be positioned in a suitable manner.

[0063] The first and second internal cushion materials 1, 2 each have approximately the same width dimension extending in the left-right direction, the second internal cushion material 2 is arranged below the first internal cushion material 1, and the groove portion W extends in an approximately horizontal straight line between both side ends of the front portion of the backrest D.

[0064] Therefore, the recessed groove portion W appears suitably on the front side of the backrest D in a manner that provides an excellent appearance.

[0065] The floor-standing chair is a sofa-type chair that extends horizontally so that multiple people can sit side by side at the same time.

[0066] For this reason, the sofa-type chair has a recessed groove W with excellent design.

[0067] The present invention is not limited to the above-described embodiment.

[0068] The other tooth holding mechanism may have a base end supported by the covering material, or may be supported by another member disposed inside the covering material. The other member is not limited to a plate-like member, but may be, for example, an internal cushioning material, an underlayment material, or any other member disposed inside the covering material.

[0069] Here, Figures 8 and 9 are schematic diagrams showing a backrest D, which is a support part of another embodiment, in the same manner as Figure 2. These will be described in order below.

[0070] <Regarding the embodiment of FIG. 8> FIG. 8 shows an embodiment in which the base end of the other tooth holding mechanism 4 is supported by the underlayment material 5.

[0071] This embodiment differs from the embodiment shown in Fig. 2 in the covering manner of the undercoat material 5 over the first internal cushion material 1 and the second internal cushion material 2. In addition, the backrest D shown in Fig. 8 differs from that shown in Fig. 2 in the arrangement of the other tooth holding mechanism 4 for forming the recessed groove portion W due to the difference in the covering manner of the undercoat material 5.

[0072] More specifically, the underupholstery material 5 of the backrest D is configured to continuously cover with a continuous piece of fabric the front side of the first internal cushion material 1 and the front side of the second internal cushion material 2. The underupholstery material 5 of this embodiment is provided with an intermediate portion 51 that is positioned between the first internal cushion material 1 and the second internal cushion material 2 and is arranged to span the first and second internal cushion materials 1 and 2 in the vertical direction. The other tooth holding mechanism 4 having the other tooth f2 is arranged on the front side (surface side) of the intermediate portion 51.

[0073] The other tooth f2 is adapted to be engaged with one tooth f1 provided on the back side of the covering material f1 by a slider (not shown).

[0074] In addition, the backrest D of this embodiment is provided with a position retaining means K for retaining the middle portion 51 of the undercoat material 5 provided between the first internal cushion material 1 and the second internal cushion material 2 so that it does not move forward from a predetermined position.

[0075] The position holding means K includes one tooth f3 constituting another fastener F2 provided on the rear side (back side) of the middle portion 51 of the undercoat material 5, and the other tooth holding mechanism 7 whose base end is supported by the plate-shaped member 3 and whose tip end is provided with the other tooth f4 constituting another fastener F2.

[0076] The other tooth holding mechanism 7 constituting the position holding means K includes a retraction cloth 71 which is a sheet-shaped intermediate substrate, and the other tooth f4 provided at the tip end of the retraction cloth 71. The base end of the retraction cloth 71 is attached to the plate-like member 3 by an appropriate method.

[0077] One engaging tooth f3 and the other engaging tooth f4 provided as the position holding means K are engaged by a slider (not shown) that constitutes the other fastener F2.

[0078] In this embodiment, the formation of the groove portion W in the upholstery material 6 of the backrest 5 is carried out by the following procedure: first, one of the teeth f3 arranged on the back side of the lower upholstery material 5 constituting the position holding means K and the other tooth f4 held by the other tooth holding mechanism 7 are connected by a slider not shown to set the middle part 51 of the lower upholstery material 5 in a predetermined position, and then one of the teeth f1 arranged on the back side of the upholstery material 6 and the other tooth f2 held by the other tooth holding mechanism 4 arranged on the front side of the middle part 51 of the lower upholstery material 5 are connected by a slider not shown.

[0079] Even with the configuration described above, the desired object of being able to suitably provide the recessed groove portion W that contributes to forming a good appearance for the chair can be achieved.

[0080] <Regarding the embodiment of FIG. 9> 9 shows an embodiment in which the base end of the other tooth holding mechanism 4 is supported by the underlay material 5, similar to the embodiment shown in FIG.

[0081] This embodiment differs from the embodiment shown in Figure 8 in the configuration of the position retaining means K for retaining the middle portion 51 of the underlayment material 5 so that it does not move forward from a predetermined position.

[0082] That is, in the embodiment of FIG. 9, the position-maintaining means K is composed only of a pull-in cloth 71 which is an intermediate base material that connects the intermediate portion 51 of the undercovering material 5 and the plate-like member 3.

[0083] Even with the configuration described above, the desired object of being able to suitably provide the recessed groove portion W that contributes to forming a good appearance for the chair can be achieved.

[0084] In other respects, the present invention is not limited to the above-described embodiment.

[0085] It goes without saying that the basic form of the chair can be modified in various ways without departing from the spirit of the present invention. For example, as shown in the example of Figure 10, the chair may include legs A, a support structure B supported by the legs A, a single seat C supported by the support structure B and extending in the left-right direction, and a single backrest D disposed behind the single seat C.

[0086] The support part is not limited to a backrest, but may be a seat.

[0087] The first internal cushion material and the second internal cushion material may be disposed adjacent to each other in the front-rear direction or the left-right direction.

[0088] It goes without saying that any suitable material can be used for the skin.

[0089] The location of the opening in the skin material is not limited to the bottom, but may be located at any suitable location as long as it does not impair the design.

[0090] The other tooth holding mechanism may not be disposed between the first inner cushion material and the second inner cushion material.

[0091] The intermediate substrate constituting the other tooth holding mechanism may be any sheet-like material, and may be made of synthetic resin.

[0092] The recessed groove may extend linearly in the vertical direction.

[0093] The chair is not limited to a sofa type chair, but may be a single-person chair.

[0094] Furthermore, the specific configuration of each part is not limited to the above embodiment, and various modifications are possible within the scope of the present invention. [Explanation of symbols]

[0095] D...Backrest (support part) 1...First internal cushioning material 2...Second internal cushioning material 3...Plate-shaped member 4...Other tooth holding mechanism 5…Underlay material 6…Skin material F...Zipper f1...One of the teeth f2...the other tooth S...slider W...Groove

Claims

1. A floor-standing chair having a support part for supporting a seated person, The support portion is either a seat or a backrest, the support portion includes a first internal cushion material, a second internal cushion material provided adjacent to the first internal cushion material, and a bag-shaped skin material covering the first and second internal cushion materials, the surface material has one tooth constituting a fastener disposed on an inner surface portion corresponding to a boundary portion between the first inner cushion material and the second inner cushion material, The other engaging tooth holding mechanism is provided, the base end of which is supported by the skin material or another member disposed inside the skin material, and the other engaging tooth constituting the fastener is provided at the tip end thereof, A chair in which a recessed groove portion is formed between the first and second internal cushion materials in the cover material by connecting the one and the other teeth together using a slider that constitutes the fastener.

2. 2. The chair according to claim 1, wherein the other tooth holding mechanism is disposed between the first inner cushion material and the second inner cushion material.

3. 3. The chair according to claim 2, wherein the other tooth holding mechanism comprises a sheet-like intermediate base material and the other tooth provided at the tip of the intermediate base material.

4. 4. The chair according to claim 3, wherein the other member is a plate-like member, and the base end of the intermediate base member is attached to the plate-like member.

5. The cushion includes an underlayment material disposed inside the skin material and covering the first and second internal cushion materials, 4. The chair according to claim 3, wherein the other member is the undercover material, and the base end of the intermediate base material is attached to the undercover material.

6. The support portion is the backrest, the one engaging tooth is disposed on the inner surface side of the front portion of the skin material disposed in front of the first and second internal cushion materials, 5. The chair according to claim 4, wherein the plate-like member is attached to the back surfaces of the first and second inner cushion materials.

7. the first and second internal cushion materials extend in the left-right direction and have approximately the same width dimension, the second internal cushion material is disposed below the first internal cushion material, 7. The chair according to claim 6, wherein the groove extends in a substantially horizontal straight line between both end portions of the front surface of the backrest.

8. 8. The chair according to claim 1, wherein the floor-standing chair is a sofa-type chair extending laterally so that a plurality of people can be seated side by side at the same time.

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