JP2024063694A - sofa - Google Patents

Abstract

To provide a sofa with a backrest and an arm rest that facilitates maintenance.SOLUTION: A sofa S includes: a seat 1; and a backrest 4 including a back plate 41 installed upward of a rear part of the seat 1 and a cushion body 42 detachably attached to an outside surface of the back plate 41.SELECTED DRAWING: Figure 4

Description

The present invention relates to a sofa that can be used conveniently in offices, homes, etc.

Traditionally, various sofas with backrests and armrests have been used in offices and other places (see, for example, Patent Document 1 and Non-Patent Document 1).

Conventional sofas generally have a structure in which cushioning material is glued around the back and armrests, which are the core materials, and then covered with upholstery.

As a result, maintenance such as washing the upholstery surface if it becomes soiled is extremely difficult.

"JP 2022-26201 A

"GAISS", KOKUYO General Catalog 2022 Furniture Edition, KOKUYO Co., Ltd., December 2021, p. 612

The present invention was made with the above in mind, and aims to make it easier to perform maintenance on sofas that have backrests and armrests.

The sofa according to the invention described in claim 1 is provided with a back panel that is disposed behind the seat and serves as a core material, and a backrest that has a cushion body that is removably attached to the outer surface of the back panel.

The sofa according to the invention described in claim 2 comprises a seat, an armrest that is provided on the side of the seat and serves as a core, and an armrest that has a cushion body that can be detachably attached to the outer surface of the armrest.

The sofa according to the invention described in claim 3 is the sofa described in claim 1 or 2, which is hung from above the backboard or armrests so as to cover the front and back of the backboard or both sides of the armrests.

The sofa according to the invention described in claim 4 is the sofa described in claim 3, in which the cushion body is fixed to the back panel or armrests at least at one point by a fastener.

The sofa according to the invention described in claim 5 is the sofa described in claim 4, in which the fastener is a wire fastener that connects the back panel or armrests to the cushioning material.

According to the present invention, the cushion body is removably attached to the outer surface of the backrest or armrest, making maintenance easy.

FIG. 1 is a front view showing a sofa according to an embodiment of the present invention. FIG. FIG. FIG. FIG. FIG. 2 is an exploded perspective view showing the support structure according to the embodiment. FIG. 4 is an exploded perspective view showing a manner in which the legs are attached according to the embodiment. FIG. 4 is an exploded perspective view showing a manner in which the legs are attached according to the embodiment. FIG. 4 is an exploded perspective view showing a mounting manner of the backrest according to the embodiment. FIG. 2 is a cross-sectional view taken along line AA in FIG. 5 is a cross-sectional view taken along line BB in FIG. 4. FIG. FIG. 13 is a cross-sectional view taken along line CC in FIG. 12. 14 is a cross-sectional view taken along line XX in FIG. 13. FIG. 4 is an explanatory diagram showing a state in which the cushion member according to the embodiment is deployed. FIG. 4 is an explanatory diagram showing a back plate and a cushion member according to the embodiment. FIG. 4 is a front view of a main part of the sofa provided with armrests according to the embodiment. FIG. 4 is a right side view of a main part of the sofa provided with an armrest according to the embodiment.

The following describes a sofa S according to one embodiment of the present invention with reference to the drawings.

As shown in Figs. 1 to 5, the sofa S of this embodiment comprises a seat 1, a support structure 2 which is a strength member that supports the seat 1 from below and provides the strength of the sofa S, and legs 3 which are attached to the support structure 2 and support the support structure 2 and the seat 1 from below. The sofa S of this embodiment can also have one or more optional members, specifically a backrest 4 or armrests P3, attached to the support structure 2. The sofa of the present invention is one with the backrest 4 or armrests P3 attached. In addition, a cushion body 42 can be removably attached to the outer surface of the back panel 41 of the backrest 4 or the armrests P31 of the armrests P3.

The following describes each part of the sofa S.

In this embodiment, three seats 1 are arranged in parallel in the width direction, and as shown in Figs. 4 and 13, each seat has a rectangular seat plate 11 and a seat cushion body 12 having a seating surface arranged above the seat plate 11. In this embodiment, the left and right sides of the seat plate 11 are supported from below by reinforcing members 7 of the support structure 2, which will be described later.

As shown in Figures 1 and 3 to 6, the support structure 2 comprises a pair of front and rear horizontal frames 5 extending in the width direction, left and right vertical frames 6 connecting the left and right ends of the front and rear horizontal frames 5, reinforcing members 7 connecting the middle parts of the front and rear horizontal frames 5, and corner members 8 interposed between the horizontal frames 5 and the vertical frames 6 to connect them. The support structure 2 also comprises a first support portion 2a that supports the seat 1, and a second support portion 2b that can support and detachably attach optional members such as a backrest 4.

In more detail, as shown in Figures 5, 6, and 8 to 11, the horizontal frame 5 is formed using a metal square pipe-shaped member, and includes a top plate 51 forming the upper surface, an outer plate 52 hanging down from the outer end of the top plate 51, i.e., the end away from the other horizontal frame 5, an inner plate 53 hanging down from the inner end of the top plate 51, i.e., the end facing the other horizontal frame 5, and a bottom plate 54 connecting the lower ends of the outer plate 52 and the inner plate 53. The top plate 51 is provided with a reinforcing material mounting hole 5a for mounting the reinforcing material 7, and a long hole 5b for supporting and removably mounting the backrest 4 and multiple other optional members. The inner plate 53 is provided with a fastener insertion hole 5c for inserting a turn fastener TF, which is a fastener for mounting optional members such as the backrest 4. The bottom plate 54 is provided with a long hole 5b that is aligned with the long hole 5b in the top plate 51 in plan view. The reinforcing material mounting hole 5a is for mounting the reinforcing material 7 via a push rivet (not shown) that passes through the reinforcing material mounting hole 5a and the screw insertion hole 72a in a state where the reinforcing material mounting hole 5a is aligned with the screw insertion hole 72a in the reinforcing material 7 as described later. The reinforcing material mounting holes 5a are provided at a plurality of pitches, and the mounting position of the reinforcing material 7 is appropriately selected according to the number and size of the seat 1. The long hole 5b is an ellipse extending in the left-right direction, and in this embodiment, a sleeve 9 can be attached. The sleeve 9 includes a flange portion 91 having a locking claw 93 for locking with the opening edge of the long hole 5b, and a sleeve body 92 that extends downward from the flange portion 91 and has an option mounting hole 9a inside. In this embodiment, the long hole 5b and the sleeve 9 form the second support portion 2b. In this embodiment, the front and rear horizontal frames 5 are connected at both ends by the vertical frames 6 via corner members 8.

As shown in Figures 5 to 9, the vertical frame 6 is formed using a metal square pipe-shaped member, and includes a top plate 61 forming the upper surface, an outer plate 62 hanging down from the outer end of the top plate 51, i.e., the end away from the other vertical frame 5, an inner plate 63 hanging down from the inner end of the top plate 61, i.e., the end facing the other vertical frame 6, and a bottom plate 64 connecting the lower ends of the outer plate 62 and the inner plate 63. The top plate 61 is provided with a long hole 6a provided to support and detachably attach a backrest 4 and multiple other optional components. The inner plate 63 is provided with a fastener insertion hole 6b for inserting a turn fastener TF, which is a fastener for attaching the backrest 4 and other optional components. The bottom plate 64 is provided with a long hole 6b that is aligned with the long hole 6b provided in the top plate 61 when viewed in a plane. The long holes 6b of the vertical frame 6 can also be fitted with sleeves 9 in the same way as the long holes 5b of the horizontal frame 5, and these long holes 6b and sleeves 9 form the second support part 2b. In this embodiment, the front and rear horizontal frames 5 can be connected not only by the vertical frames 6 but also by the reinforcing material 7.

The reinforcing member 7 has a channel shape that opens downward, and as shown in Figs. 6 and 9, it has a reinforcing member main body 71 having a top plate 73 and side plates 74 that hang down from both the left and right edges of the top plate 73, and a connecting portion 72 that protrudes outward from both the front and rear ends of the top plate 73 of the reinforcing member main body 71 and is connected to the horizontal frame 5. The reinforcing member 7 is attached to the horizontal frame 5 by a push rivet (not shown) that passes through the reinforcing member mounting hole 5a and the screw insertion hole 72a, as described above, with the screw insertion hole 72a provided in the connecting portion 72 aligned with the reinforcing member mounting hole 5a of the horizontal frame 5. Here, in this embodiment, the reinforcing member 7 supports the left and right halves of the seat 1 from below. That is, the reinforcing member mounting hole 5a of the horizontal frame 5 and the reinforcing member 7 form the first support portion 2a that supports the seat 1. As mentioned above, the front and rear horizontal frames 5 are connected using vertical frames 6 and reinforcing members 7, and corner members 8 are interposed between the horizontal frames 5 and the vertical frames 6.

As shown in Figs. 6 to 8, the corner member 8 is a corner member body 81 having a top plate 83, a bottom plate 84, and an upright plate 85 connecting the front-rear end of the top plate 83 and the bottom plate 84, and a mounting fixture 82 connecting the other front-rear end of the top plate 83 and the bottom plate 84 of the corner member body 81, which are integrally constructed by welding or the like, and is welded to the vertical frame 6. The corner member 8 is connected to the horizontal frame 5 by threading a male screw 87 passed through a screw insertion hole 5d provided in the horizontal frame 5 into a female screw hole (not shown) provided in the mounting fixture 82. During normal use, the corner member 8 is concealed by a corner cover 88. The corner member body 81 has first and second leg mounting parts 8a and 8b on the lower and upper surfaces, respectively, which are at different heights from each other. Both the first and second leg attachment parts 8a, 8b have female threaded holes 8a1, 8b1 for fastening the bracket 31 provided at the base end of the leg 3 via a screw 89. In addition, the first and second leg attachment parts 8a, 8b have leg insertion holes 8a2, 8b2 in their centers through which the leg 3 attached to the second leg attachment part 8b can pass. The manner in which the leg 3 is attached will be described later.

In this embodiment, the leg 3 is formed using a cylindrical metal pipe-shaped member, and as shown in Figs. 6 to 8, a rectangular bracket 31 is provided at the base end, and an adjuster 32 is attached to the tip end. This leg 3 can be selectively attached to the first or second leg attachment parts 8a, 8b of the corner member 8 of the support structure 2. More specifically, a first attachment mode in which the bracket 31 is screwed from below with a screw 89 while abutting against the lower surface of the first leg attachment part 8a, and a second attachment mode in which the bracket 31 is screwed from above with a screw 89 while abutting against the upper surface of the second leg attachment part 8b, can be selected. 31a is a screw insertion hole for inserting the screw 89 into the bracket 31. Here, in the second attachment mode, this leg 3 passes through the leg insertion holes 8a2, 8b2 of the first and second leg attachment parts 8a, 8b. In addition, when the leg 3 is attached to the second leg attachment portion 8b, the height position of the support structure 2 when the leg 3 is grounded differs by the thickness of the support structure 2 compared to when the leg 3 is attached to the first leg attachment portion 8a. In FIG. 1, the position of the adjuster 32 of the leg 3 when the leg 3 is attached to the first leg attachment portion 8a is shown by a solid line, and the position of the adjuster 32 of the leg 3 when the leg 3 is attached to the second leg attachment portion 8b is shown by an imaginary line.

As described above, the backrest 4 can be attached to the support structure 2 of the sofa S as an optional component. The backrest 4 has a back panel 41 that is provided behind the seat 1 and serves as a core material, and a cushion body 42 that is removably attached to the outer surface of the back panel 41.

As shown in Fig. 4 and Figs. 12 to 14, the back plate 41 includes a rectangular back plate body 43, a mounting member 44 protruding forward from the back plate 41, and a rod-shaped protrusion 45 protruding downward from the front of the mounting member 44 and engaging with the second support portion 5b of the horizontal frame 5. The mounting member 44 includes a horizontal portion 441 protruding forward from the back plate 41 and a hanging portion 442 hanging from the protruding end of the horizontal portion 441. The hanging portion 442 is provided with a fastener insertion hole 4a for inserting the turn fastener TF in alignment with the fastener insertion hole 5c of the horizontal frame 5. In this embodiment, the rod-shaped protrusion 45 is cylindrical and can engage with the second support portion 5b of the horizontal frame 5, more specifically, the option mounting hole 9a of the sleeve 9. Its diameter d0 is set to be equal to the minor diameter d1 of the option mounting hole 9a and shorter than the major diameter d2 of the option mounting hole 9a.

The procedure for attaching the back panel 41 to the horizontal frame 5 will now be described. First, the sleeve 9 is attached to the long hole 5b of the horizontal frame 5 to form the second support portion 5b. Next, the rod-shaped protrusion 45 of the backrest 4 is inserted into the option mounting hole 9a of the sleeve 9. Then, the fastener insertion holes 4a, 5c of the backrest 4 and horizontal frame 5 are aligned, the turn fastener TF is inserted into the fastener insertion holes 4a, 5c, and the turn fastener TF is rotated 90 degrees.

In this embodiment, as described above and as shown in Figures 12 to 15, the cushion body 42 is removably attached to the outer surface of the back plate 41.

As shown in Figures 14 and 15, the cushion body 42 includes a cushion body 421 having a cushion material 423 and an upholstery 424 that covers the cushion material 423, and a belt 422 that is connected to the upholstery P44 of the cushion body 421 and is attached so as to surround at least a portion of the backrest 4.

In this embodiment, as shown in Figs. 13 and 14, the cushion body 42 is folded at the upper edge of the backrest 4 from the inside to the outside, and the cushion body 42 is formed with an outer cushion 425, which is a portion located on the outside (back side) of the back panel 41, and an inner cushion 426, which is a portion located on the inside (front side) of the back panel 41.

In more detail, as described above and as shown in FIG. 15, the cushion body 421 includes a cushion material 423 made of, for example, urethane resin, and upholstery 424 made of fabric or the like arranged on the outside of both sides of the cushion material 423. Both upholstery 424 are sewn together near the outer periphery.

The cushion body 42 is also connected to the back plate 41 by a linear fastener F. More specifically, linear fasteners F are attached to the area where the forward surface of the back plate 41 faces the rearward surface of the inner cushion 426, and to the area where the rearward surface of the back plate 41 faces the forward surface of the outer cushion 425, and the linear fasteners F are used to connect the back plate 41 and the cushion body 42. F1 in Figure 14 is the tape of this linear fastener F.

In this embodiment, the belt 422 is made of leather or the like, and is connected to the upholstery 424 as described above. More specifically, as shown in Figures 15 to 17, one end of the belt 422 is sewn to the inner cushion 426, for example. The other end of the belt 422 is provided with a male hook member H1, which is shaped to connect the inward surface 425a of the outer cushion 425 and the outward surface 426a of the inner cushion 426 by engaging with a male hook member H2 provided on the upholstery 424 of the outer cushion 425.

The cushion body 42 can be removed from the back panel 41 by operating the line fastener F to release the connection between the back panel 41 and the cushion body 42, and then by lifting the cushion body 42 (the outer cushion 425 and the inner cushion 426).

In addition, in this embodiment, an armrest P3 can be attached to the vertical frame 6 of the support structure 2 as an optional component. This armrest P3 has an armrest board P31 that is provided on the side of the seat 1 and serves as a core material, and a cushion body P32 that is removably attached to the outer surface of this armrest board P31.

As shown in Figures 18 and 19, the armrest P31 has the same structure as the backrest 41 described above, except for the orientation and attachment target, so corresponding parts are given reference numbers with the leading 4 changed to P3 and their explanations are omitted. The cushion body P32 also has the same structure as the cushion body 42 of the backrest 4 described above, so corresponding parts are given reference numbers with the leading 4 changed to P3 and their explanations are omitted.

Here, FIG. 1 is a front view of the sofa S according to this embodiment. FIG. 2 is a plan view of the sofa S. FIG. 3 is a bottom view of the sofa S. FIG. 4 is a right side view of the sofa S. FIG. 5 is an exploded perspective view of the sofa S. FIG. 6 is an exploded perspective view of the support structure 2 according to this embodiment. FIG. 7 is an exploded perspective view from the top side showing the mounting state of the legs 3 according to this embodiment. FIG. 8 is an exploded perspective view from the bottom side. FIG. 9 is an exploded perspective view showing the mounting state of the backrest 4 according to this embodiment. FIG. 10 is a cross-sectional view taken along line A-A in FIG. 1. FIG. 11 is a cross-sectional view taken along line B-B in FIG. 4. Note that in FIGS. 10 and 11, the vicinity of the joint portion of the back panel 41 to the support structure 2 is shown in an enlarged manner. FIG. 12 is a front view of the backrest 4 according to this embodiment. FIG. 13 is a right side view of the backrest 4. FIG. 14 is a cross-sectional view taken along line C-C in FIG. 12. FIG. 15 is a cut-away view taken along line X-X in FIG. 13. In FIG. 15, all parts except the back panel 41 and the cushion body 42 are omitted. FIG. 16 is an explanatory diagram showing the cushion member 42 according to this embodiment in an unfolded state. FIG. 17 is an explanatory diagram showing the cushion member 42 in a flipped state to expose the back panel 41. FIG. 18 is a front view of the sofa S with the armrest P3 according to this embodiment attached. FIG. 19 is a right side view of the sofa S with the armrest P3 attached.

As described above, according to the configuration of this embodiment, the cushion bodies 42, P32 are removably attached to the outer surfaces of the back panel 41 and armrest panel P31, so that if the surfaces of the cushion bodies 42, P32 become soiled, the cushion bodies 42, P32 can be easily replaced, cleaned, or otherwise maintained.

In addition, the cushion body 42, P32 is fixed to the back panel 41 or armrest P31 at at least one location by a wire fastener F as a fastener, so that the cushion body 42, P32 can be securely attached to the back panel 41 or armrest P31 when the sofa S is in use.

In addition, because the belt 422 and the cushion body 421 are wrapped around the back plate 41, the side edges of the cushion body 42 are less likely to slip off the back plate 41.

Note that the present invention is not limited to the embodiments described above.

For example, if the chair has a backrest behind the seat, the back panel may be fixed and non-detachable.

The back panel (or armrests) and the cushion body may also be connected using fasteners other than linear fasteners, such as hook-and-loop fasteners or elastic belts.

Furthermore, cushion bodies separated into front and rear parts may be attached to the front and rear of the back panel. In this case, the upper edges of the front and rear cushion bodies may be joined with a fastener and the fastener may be hung on the upper end of the back panel, or the back panel (or arm panel) and the cushion bodies may be connected with a wire fastener or hook-and-loop fastener. Furthermore, a cushion body formed in a bag shape may be placed over the back panel (or arm panel).

In addition, the belt in the above-mentioned embodiment does not necessarily have to be provided, and even if a belt is provided, any material and method of attachment to the cushion body may be used.

Various other modifications may be made without departing from the spirit of the present invention.

S...sofa 1...seat 4...backrest 41...backboard 42...cushion body P3...armrest P31...armboard P32...cushion body F...fastening device (wire fastener)

Claims (5)

A sofa that has a seat, a back panel that is located behind the seat and serves as a core, and a backrest that has a cushion body that can be detachably attached to the outer surface of the back panel. A sofa that has a seat, an armrest that is provided on the side of the seat and serves as a core, and an armrest that has a cushion body that can be detachably attached to the outer surface of the armrest. The sofa according to claim 1 or 2, wherein the cushion body is placed over the back panel or armrests so as to cover the front and back of the back panel or both sides of the armrests. The sofa according to claim 3, in which the cushion body is fixed to the back panel or armrests at least at one point by a fastener. The sofa according to claim 4, wherein the fastener is a wire fastener that connects the back panel or armrests to the cushioning material.

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