chair

Abstract

To provide a chair which has such a structure that an end edge of an inner cover provided on a seat body is suitably covered by a seat cover so as to be hardly seen.SOLUTION: There is provided a chair whose seat is supported by a support frame. The seat includes a seat body D and a seat cover which covers the upper part and outer part of the seat body D. The seat body D includes a seat base 4, a seat cushion which is supported by the seat base 4 and an inner cover 6 which covers the upper part and outer part of the seat cushion. Positioning means I which positions an end edge 6e of the inner cover 6 is provided in a periphery of the seat base 4. The seat cover may cover the positioning means I and the end edge 6e of the inner cover 6 so as not to be seen from the outside.SELECTED DRAWING: Figure 15

Description

[Technical Field]

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

[0002] BACKGROUND ART Conventionally, various chairs have been known that include a seat having a seat body with a seat cushion disposed therein and a seat cover that covers the seat body (see, for example, Patent Document 1).

[0003] The seat cushion is the main part that bears the weight of the seated person, and so attempts have been made to improve the strength and durability of the seat cushion by covering the seat cushion with a cover material in addition to the seat cover that forms the outer surface of the seat.

[0004] However, when a user or the like looks at the bottom side of conventional seats, it is easy to see that another cover covering the seat cushion protrudes from the edge of the seat cover, which is one of the factors that mars the appearance of the seat. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2010-046496 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 that is configured so that at least the edge portion of the inner cover provided on the seat body is suitably covered by a seat cover so that it is difficult to see. [Means for solving the problem]

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

[0008] The invention described in claim 1 is a chair having a seat supported on a support frame, the seat comprising a seat body and a seat cover covering the upper and outer parts of the seat body, the seat body comprising a seat base formed of synthetic resin, a seat cushion supported on the seat base, and an inner cover covering the upper and outer parts of the seat cushion, and a positioning means for positioning the edge of the inner cover is provided on the peripheral part of the seat base, and the seat cover can cover the positioning means and the edge of the inner cover so that they cannot be seen from the outside.

[0009] The invention described in claim 2 is the chair described in claim 1, wherein the positioning means can position the edge portion of the inner cover by restricting inward and downward movement of the edge portion.

[0010] The invention described in claim 3 is the chair described in claim 2, wherein the positioning means is an upright wall disposed on the peripheral edge and a plurality of protrusions protruding outward from the upright wall.

[0011] The invention described in claim 4 is a chair described in claim 3, in which the upright wall is arranged over the entire peripheral portion, and the multiple protrusions are arranged on the upright wall at regular intervals.

[0012] The invention described in claim 5 is a chair described in claim 4, wherein the seat base has a flange-like portion extending outward from the upper edge of the upright wall and supporting the peripheral end of the seat cushion.

[0013] The invention described in claim 6 is a chair described in claim 5, wherein the inner cover is arranged to wrap around the underside of the seat cushion and the flange-shaped portion of the seat base, and the edge portion of the inner cover is tightened by a string member and positioned by the upright wall and the protrusion.

[0014] The invention described in claim 7 is the chair described in claim 1, wherein the inner cover is mainly made of nonwoven fabric. [Effects of the Invention]

[0015] As described above, according to the present invention, it is possible to provide a chair having a configuration in which at least the edge portion of the inner cover provided on the seat body is suitably covered by the seat cover so that it is difficult to see. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a perspective view showing an embodiment of the present invention; [Figure 2] FIG. [Figure 3] FIG. [Figure 4] FIG. [Figure 5] FIG. [Figure 6] FIG. [Figure 7] FIG. [Figure 8] FIG. [Figure 9] XX line cross section in FIG. 5. [Figure 10] Cross-sectional view taken along line YY in FIG. 5. [Figure 11] FIG. [Figure 12] FIG. [Figure 13] FIG. [Figure 14] FIG. [Figure 15] FIG. [Figure 16] FIG. [Figure 17] FIG. [Figure 18] FIG. 4 is a right side view showing the stacked state in the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, one embodiment of the present invention will be described with reference to FIGS.

[0018] The chair comprises a support frame A, a seat B supported by the support frame A, armrests G supported by the support frame A, and a backrest H supported by the support frame A via the armrests G.

[0019] As shown in FIG. 18, the chair is configured so that it can be stacked vertically with other chairs of the same structure.

[0020] <<Support frame A>> The support frame A is made of metal pipe material.

[0021] The support frame A comprises a pair of front leg frame parts 1 on the left and right, a pair of rear leg frame parts 2 on the left and right, and a seat support frame part 3 connected to the front and rear leg frame parts 1 and 2.

[0022] <Front leg frame part 1> The front leg frame 1 extends in a substantially straight line in the vertical direction. The front leg frame 1 is tilted backward in a side view. That is, the front leg frame 1 is configured to be positioned gradually rearward as it goes upward in a side view.

[0023] The front leg frame portion 1 is disposed inside the rear leg frame portion 2 in front and rear views.

[0024] A caster C is provided at the lower end of the front leg frame portion 1. The chair may be configured so that the caster C is not provided at the lower end of the front leg frame portion 1.

[0025] <Rear leg frame part 2> The rear leg frame 2 extends in a substantially straight line in the vertical direction. The rear leg frame 2 is tilted forward in side view. That is, the rear leg frame 2 is configured to be positioned gradually forward as it goes upward in side view.

[0026] The rear leg frame portion 2 is disposed outward of the front leg frame portion 1 in front and rear views.

[0027] A caster C is provided at the lower end of the rear leg frame portion 2. The chair may be configured so that the caster C is not provided at the lower end of the rear leg frame portion 2.

[0028] The rear leg frame part 2 extends higher than the front leg frame part 1, and its upper end part 2t is located above the seat B. A frame connection part g1 provided at the front end part of the armrest G is fitted onto the upper end part 2t of the rear leg frame part 2 and fixed by a screw v1.

[0029] <Seat frame part 3> The seat support frame portion 3 connects the front and rear leg frame portions 1 and 2, and is disposed under the seat B, forming a generally H-shape as a whole.

[0030] The seat support frame part 3 comprises a front seat support frame part 31 connected to the front leg frame part 1 and extending in the left-right direction, a rear seat support frame part 32 connected to the rear leg frame part 2 and extending in the left-right direction, and a central seat support frame part 33 disposed in the center in the left-right direction, extending in the front-rear direction, and connecting the front seat support frame part 31 and the rear seat support frame part 32.

[0031] In this embodiment, the seat support frame portion 3 is formed by welding a pair of left and right frame members F each having a substantially outward U-shape.

[0032] The front leg frame portion 1 is integrally connected to the front outer end portions of the left and right frame members F. The rear outer end portions of the left and right frame members F are welded to the inside of the vertically middle portion of the rear leg frame portion 2. The inner end portions of the left and right frame members F, i.e., the inner end portions of the portions extending longitudinally in the front-to-rear direction, are rigidly connected to each other by welding.

[0033] [Front seat frame part 31] The front seat support frame portion 31 extends substantially horizontally in the left-right direction and is disposed in front of the left and right bulging portions 42 of the seat base 4.

[0034] The front seat support frame portion 31 engages with a movement restricting portion 43 provided at the front of the seat base 4, so that downward movement thereof relative to the seat base 4 is restricted.

[0035] It should be noted that no screw insertion holes are provided in the front seat support frame portion 31. In this embodiment, the front seat support frame portion 31 is configured so that it does not need to be fastened to the seat base 4 with screws.

[0036] [Rear seat frame part 32] The rear seat support frame portion 32 extends substantially horizontally in the left-right direction and is disposed behind the left and right bulging portions 42 of the seat base 4.

[0037] The rear seat support frame portion 32 is disposed in front of an outer wall portion 44 provided at the rear of the seat base 4.

[0038] The rear seat support frame portion 32 has two screw insertion holes h that penetrate vertically at the left and right. The rear seat support frame portion 32 is fastened to a nut portion n provided on the seat base 4 by a screw v2 inserted into the screw insertion hole h.

[0039] [Central seat frame part 33] The central seat support frame portion 33 extends substantially horizontally in the front-rear direction and is disposed between the left and right bulging portions 42 of the seat base 4 .

[0040] The central seat support frame portion 33 is made up of two pipes extending in the front-rear direction and aligned side by side.

[0041] It should be noted that no screw insertion holes are provided in the central seat support frame portion 33. In this embodiment, the central seat support frame portion 33 is configured so that it does not need to be fastened to the seat base 4 with screws.

[0042] <<Location B>> Seat B has a generally rectangular shape in a plan view. The rear end of seat B has a gently curved shape that convexly extends rearward. Seat B includes a seat body D and a seat cover E attached to seat body D.

[0043] <Seat body D> The seat body D comprises a seat base 4 made of synthetic resin, a seat cushion 5 supported by the seat base 4, and an inner cover 6 covering the upper and outer parts of the seat cushion 5.

[0044] [Seat base 4] The seat base 4 is a synthetic resin molded product supported by the seat support frame part 3. The seat base 4 has a recessed portion J on its underside that is open downward and recessed upward so that the seat support frame part 3 can be accommodated therein.

[0045] The seat base 4 is provided with a mounting portion R at a position corresponding to the connecting device 8 of the seat cover E, to which the connecting device 8 can be attached.

[0046] The seat base 4 comprises a base main body 41 having a mounting portion on the upper surface on which the seat cushion 5 is placed and a downward portion 41s on the lower surface that can engage with the seat support frame portion 3, left and right bulging portions 42 that are provided in pairs on the left and right and bulge downward below the base main body 41, a movement restriction portion 43 that is arranged forward of the left and right bulging portions 42 and can engage with the front seat support frame portion 31 that constitutes the seat support frame portion 3 to restrict the relative downward movement of the front seat support frame portion 31, and an outer wall portion 44 that is arranged rearward of the left and right bulging portions 42.

[0047] The base main body 41 serves as a base. The seat cushion 5 is placed on the upper surface of the base main body 41. The base main body 41 has downward portions 41s that are arranged above the lower surfaces 42s of the left and right bulging portions 42 and have a downward surface shape. The seat support frame 3 engages with the downward portions 41s of the base main body 41.

[0048] The downward portion 41s of the base main body 41 is substantially H-shaped in bottom view to correspond to the shape of the seat-receiving frame 3. Nut portions n are provided at two locations on the left and right of the downward portion 41s of the base main body 41, located rearward of the left and right bulging portions 42.

[0049] The nut portion n includes a metal plate nut (not shown). The nut portion n is provided at only two locations behind the left and right bulging portions 42. That is, the nut portion n is provided only on the downward portion 41s, which is located behind the left and right bulging portions 42 and in front of the outer wall portion 44. A screw v2 is threadedly fastened to the nut portion n through a screw insertion hole h provided in the rear seat-receiving frame portion 32.

[0050] A flange-shaped portion 41t is provided on the peripheral edge of the base main body 41 to support the peripheral edge of the seat cushion 5. The flange-shaped portion 41t extends outward from the upper edge of the standing wall i1 that positions the edge portion 6e of the inner cover 6. A support wall 41h that can engage with the seat cushion 5 is provided on the edge of the flange-shaped portion 41t.

[0051] Positioning means I for positioning the edge portion 6e of the inner cover 6 is provided on the periphery of the base main body 41, inside the flange-shaped portion 41t. The positioning means I can position the edge portion 6e of the inner cover 6 by restricting the inward and downward movement of the string-fastened edge portion 6e provided on the inner cover 6.

[0052] The positioning means I includes an upright wall i1 having an upright surface m facing outward, and a plurality of protrusions i2 protruding outward from the upright wall i1.

[0053] The upright wall i1 is disposed over the entire peripheral edge of the base main body 41. The upright wall i1 is provided outside the left and right bulging portions 42, the movement restricting portion 43, and the outer wall portion 44.

[0054] The multiple protrusions i2 are arranged at regular intervals on the upright wall i1. In this embodiment, the protrusions i2 each having a substantially rectangular shape are arranged at three locations on the periphery of the base main body 41, i.e., at both left and right ends of the center in the front-rear direction of the base main body 41 and at the rear end of the center in the left-right direction. Separation prevention protrusions p are erected upward from the protruding ends of the three rectangular protrusions i2 to prevent the edge portion 6e of the inner cover 6 from separating.

[0055] In addition, protrusions i2 each having an approximately triangular shape are arranged at five locations on the peripheral edge of the base main body 41, i.e., at the four corners of the base main body 41 which is rectangular overall, and at the front end of the center in the left-right direction.

[0056] The left and right bulging portions 42 are provided symmetrically. Each of the left and right bulging portions 42 has a generally rectangular shape that is elongated in the front-to-rear direction when viewed from the bottom. The inner edges of the left and right bulging portions 42 are aligned with the central seat-receiving frame portion 33 that constitutes the seat-receiving frame portion 3, the front edges of the left and right bulging portions 42 are aligned with the front seat-receiving frame portion 31 that constitutes the seat-receiving frame portion 3, and the rear edges of the left and right bulging portions 42 are aligned with the rear seat-receiving frame portion 32 that constitutes the seat-receiving frame portion 3.

[0057] The movement restricting portion 43 is disposed forward of the left and right bulging portions 42. The movement restricting portion 43 includes an upright wall portion 43a protruding downward from the base main body portion 41, and an extension wall 43b extending in a cantilevered manner from the lower end of the upright wall portion 43a in the direction of the left and right bulging portions 42, i.e., rearward.

[0058] The extension wall 43b is engaged with the underside of the front seat support frame portion 31, thereby restricting the relative movement of the front seat support frame portion 31 and the seat base 4 in directions away from each other.

[0059] The outer wall portion 44 is disposed outside, i.e., rearward of, the downward portion 41s on which the nut portion n is provided. The rear portion of the outer wall portion 44 has a curved shape that is convex rearward in bottom view.

[0060] The outer wall portion 44 protrudes downward from the base main body portion 41 so as to fit along the outside of the rear seat-receiving frame portion 32 that constitutes the seat-receiving frame portion 3. The outer wall portion 44 disposed at the rear of the seat base 4 is provided with an attachment portion R to which a connector 8 provided on the seat cover E is attached.

[0061] The mounting portions R are provided in pairs on the left and right to correspond to the pair of left and right connectors 8 provided on the seat cover E. In other words, the two mounting portions R are arranged on the outer wall portion 44 with a gap between them on the left and right.

[0062] The mounting portion R has a recessed portion r1 in which a recessed space rs is formed, and an engaging portion r2 extending in the left-right direction and bridged over the recessed portion r1 so as to face the recessed space rs. An annular portion 81c formed on the main body 81 of the connector 8 is adapted to engage with the engaging portion r2.

[0063] In addition, the left and right bulges 42, the movement restricting portion 43, and the outer surfaces near each base end of the outer wall portion 44 on the seat base 4 are in contact with or close to the edge portion 7e of the seat cover main body 7 attached to the seat main body D.

[0064] The seat base 4 having the above-described configuration has a recessed portion J formed therein that is approximately H-shaped when viewed from the bottom and that can accommodate the seat support frame portion 3. The recessed portion J is open downward and has a shape that is recessed upward to form an H shape.

[0065] The recessed portion J includes a first recessed portion j1 ​​extending in the front-to-rear direction, which is provided between the left and right bulging portions 42 and can accommodate the central seat-support frame portion 33, which is part of the seat-support frame portion 3; a second recessed portion j2 extending in the left-to-right direction, which is provided between the left and right bulging portions 42 and the movement restricting portion 43 and can accommodate the front seat-support frame portion 31, which is part of the seat-support frame portion 3; and a third recessed portion j3 extending in the left-to-right direction, which is provided between the left and right bulging portions 42 and the outer wall portion 44 and can accommodate the rear seat-support frame portion 32, which is part of the seat-support frame portion 3.

[0066] The recessed portion J is designed to accommodate the seat support frame portion 3 within the recessed space so that the seat support frame portion 3 does not protrude below the lower ends of the left and right bulging portions 42, the movement restricting portion 43, and the outer wall portion 44.

[0067] As shown in Figure 18, when the chair of this embodiment is stacked vertically on another chair of the same structure, the left and right bulges 42, movement restricting portion 43, and outer wall portion 44 that constitute the seat base 4 are designed to abut against the upper surface of the seat B of the other chair in preference to the seat support frame portion 3.

[0068] [Seat cushion 5] The seat cushion 5 is made mainly of urethane foam, which is a foam material. The underside of the seat cushion 5 is attached to the upper surface of the seat base 4, on which multiple ribs rb are exposed.

[0069] [Inner cover 6] The inner cover 6 is mainly intended to protect the seat cushion 5. The inner cover 6 is provided so as to cover the upper and side surfaces of the seat cushion 5 and the lower surface side of the flange-shaped portion 41t of the seat base 4.

[0070] The inner cover 6 is mainly made of nonwoven fabric, which has a certain degree of rigidity and contributes to weight reduction. The inner cover 6 is bag-shaped with an open bottom.

[0071] The inner cover 6 is located on the underside of the seat body D and has a continuous edge portion 6e that forms a substantially annular shape. The substantially annular edge portion 6e is configured to be narrowed in the direction of decreasing diameter by a string member (not shown). The edge portion 6e is positioned by engaging with an upright wall i1 and a protrusion i2 provided on the seat base 4.

[0072] <Seat cover E> The seat cover E is intended to create a suitable appearance for the seat B. The seat cover E is attached to the outside of the seat body D.

[0073] The seat cover E can cover the seat cushion 5 covered by the inner cover 6, and can also cover the positioning means I provided on the seat base 4 and the edge portion 6e of the inner cover 6 positioned by the positioning means I so that it cannot be seen from the outside.

[0074] The seat cover E comprises a seat cover main body 7 that covers the upper and outer parts of the seat main body D, i.e., the upper surface, sides, and lower surface of the peripheral part of the seat main body D, and a connecting device 8 having a main body part 81 that is a belt-shaped member attached to one end, i.e., the rear, of the seat cover main body 7.

[0075] [Seat cover body 7] The seat cover body 7 is mainly made of fabric. The seat cover body 7 is bag-shaped with an open bottom side. The seat cover body 7 is located on the underside of the seat body D and has a continuous edge portion 7e that forms a substantially ring shape. At least a portion of the edge portion 7e of the seat cover body 7 is provided with a rubber member that is an elastic member that can expand and contract the edge portion 7e.

[0076] The edge portion 7e of the seat cover main body 7 is located on the underside of the peripheral edge of the seat main body D. When attached to the seat main body D, the edge portion 7e of the seat cover main body 7 is biased in the direction of reducing its diameter by a rubber member 71, which is an elastic member.

[0077] In this embodiment, the elastic rubber members 71 are provided only on the other end of the seat body D, that is, only on parts of the edge portions 7e corresponding to the left and right corners of the front end.

[0078] [Connector 8] The connector 8 has a belt-shaped main body 81 that can form a ring-shaped portion 81c that engages with an engaging portion r2 provided on the mounting portion R of the seat base 4, and a snap button 82 that is a fastening means for fastening predetermined portions of the main body 81 together to form the ring-shaped portion 81c on the main body 81.

[0079] The main body 81 is a strip-shaped piece of fabric. The main body 81 has a length dimension that allows it to engage with the engaging portion r2 of the mounting portion R, and a width dimension that allows it to be inserted into the recessed portion r1 of the mounting portion R.

[0080] The snap button 82 has a known configuration using a pair of snap button components that can be engaged and disengaged. The snap button 82 can hold an annular portion 81c formed by wrapping a part of the main body 81 around the engagement portion r2.

[0081] <<Attaching the seat cover E to the seat body D>> The procedure for attaching the seat cover E to the seat body D is, for example, as follows.

[0082] First, prepare the seat body D. At this time, the seat cushion 5 is covered with the inner cover 6, and the edge portion 6e of the inner cover 6 is positioned by the positioning means I provided on the seat base 4 so as not to move toward the center of the seat base 4.

[0083] Next, the connectors 8 of the seat cover E are attached to the left and right mounting portions R provided on the outer wall portion 44 of the seat base 4. More specifically, the main body portion 81 of the connector 8 is surrounded by the engagement portion r2 of the mounting portion R, and then predetermined locations of the main body portion 81 are connected together using snap buttons 82 to hold the annular portion 81c formed on the main body portion 81.

[0084] Next, the rear part of the seat cover main body 7 is fitted over the rear part of the seat main body D. Note that the rubber member 71 is not provided on the rear edge portion 7e of the seat cover main body 7.

[0085] Thereafter, the front part of the seat cover main body 7 is fitted over the front part of the seat main body D. Rubber members 71 are arranged on the edge portion 7e located at the front part of the cover main body 7, corresponding to both front corners of the seat main body D. Therefore, the work of attaching the front part of the cover main body 7 to the seat main body D is carried out by temporarily stretching the edge portion 7e located at the front part of the cover main body 7 and on which the rubber members 71 are arranged.

[0086] Through the above steps, the seat cover E is attached to the seat body D.

[0087] <<Attaching seat B to seat support frame part 3>> The procedure for attaching the seat B to the seat receiving frame portion 3 of the support frame A is, for example, as follows.

[0088] First, the seat B is moved so that the front seat support frame portion 3 is disposed in the second recessed portion j2 provided in the seat base 4.

[0089] Next, the front end of the front seat support frame part 3 arranged in the second recess j2 is engaged with the movement restricting part 43, and the seat B is rotated around the front seat support frame part 3 so that the central seat support frame part 33 and the rear seat support frame part 32 are accommodated in the first recess j1 and the third recess j3.

[0090] As a result, the entire seat support frame part 3 is fitted into the recessed part J, restricting the relative movement in the front-to-back and left-to-right directions between the seat B and the seat support frame part 3. At this time, the movement restricting part 43 also restricts the downward movement of the front seat support frame part 31.

[0091] Finally, the rear seat support frame portion 32 is screwed with the screw v2 into the nut portion n provided on the base main body portion 41. In this embodiment, the downward movement of the front seat support frame portion 31 is restricted by the movement restricting portion 43, so that the seat B can be fixed to the seat support frame portion 3 simply by screwing the rear seat support frame portion 32 to the seat base 4.

[0092] Through the above steps, the seat B is attached to the seat receiving frame portion 3 of the support frame A.

[0093] <<Armrest G>> The armrest G comprises a cylindrical frame connection part g1 arranged at the front end and open downward, a wall-like part g2 in the form of an upright wall extending rearward from the rear end of the frame connection part g1, and an elbow rest part g3 having an elbow rest surface extending in the front-to-rear direction and connected to the upper ends of the frame connection part g1 and the wall-like part g2.

[0094] The armrest G has a relatively short dimension in the front-to-rear direction. The chair has a frame connection part g1, which is the front part of the armrest G, connected to the upper end parts 2t of the left and right rear legs of the support frame A.

[0095] <<Backrest H>> The backrest H is connected to the rear end of the armrest G. The backrest H is indirectly supported by the support frame A via the armrest G.

[0096] As explained above, the chair according to this embodiment has a seat B supported by a support frame A. The seat B is provided with a seat body D and a seat cover E that covers the upper and outer parts of the seat body D.

[0097] The seat body D comprises a seat base 4 made of synthetic resin, a seat cushion 5 supported by the seat base 4, and an inner cover 6 covering the upper and outer parts of the seat cushion 5.

[0098] A positioning means I for positioning the edge portion 6e of the inner cover 6 is provided on the peripheral portion of the seat base 4, and the seat cover E can cover the positioning means I and the edge portion 6e of the inner cover 6 so that they cannot be seen from the outside.

[0099] Therefore, it is possible to provide a chair having a configuration in which at least the edge portion 6e of the inner cover 6 provided on the seat body D is suitably covered by the seat cover E so as to be difficult to see.

[0100] That is, in this embodiment, a configuration is provided for positioning the edge portion 6e of the inner cover 6 on the seat base 4. Therefore, the edge portion 6e of the inner cover 6 is unlikely to slip inward from the positioning means I. As a result, the seat cover E can suitably cover the edge portion 6e of the inner cover 6 so that it is difficult to see from the outside.

[0101] The positioning means I is capable of positioning the edge portion 6e of the inner cover 6 by restricting the edge portion 6e from moving inward and downward.

[0102] Therefore, the positioning means I can suitably position the edge portion 6e of the inner cover 6 so that it does not protrude from the seat cover E and is not visible.

[0103] The positioning means I is an upright wall i1 disposed on the periphery and a plurality of protrusions i2 protruding outward from the upright wall i1.

[0104] Therefore, the upright wall i1 and the protrusion i2 cooperate to suitably restrict inward and downward movement of the edge portion 6e of the inner cover 6.

[0105] An upright wall i1 is provided over the entire peripheral edge, and a plurality of protrusions i2 are provided at regular intervals on the upright wall i1.

[0106] Therefore, with this configuration, the upright wall i1 can effectively restrict inward movement of the edge portion 6e of the inner cover 6, and the protrusion i2 can effectively restrict downward movement of the edge portion 6e of the inner cover 6.

[0107] The seat base 4 is provided with a flange-like portion 41t that extends outward from the upper edge of the upright wall i1 and supports the peripheral edge of the seat cushion 5.

[0108] Therefore, the brim-shaped portion 41t can suitably support the seat cushion 5 from below, and can suitably position the edge portion 6e of the inner cover 6 on the underside when attached, and can suitably guide it toward the positioning means I.

[0109] The inner cover 6 is arranged to wrap around the underside of the brim-shaped portion 41t of the seat cushion 5 and the seat base 4, and the edge portion 6e of the inner cover 6 is tightened by a string member and positioned by the upright wall i1 and the protrusion i2.

[0110] Therefore, the inner cover 6 covers the lower surface side of the flange-shaped portion 41t of the seat cushion 5 and the seat base 4 in an appropriate manner.

[0111] The inner cover 6 is mainly made of nonwoven fabric.

[0112] Therefore, the inner cover 6 is lightweight and has a certain degree of rigidity.

[0113] The present invention is not limited to the above-described embodiment.

[0114] The positioning means may be any means that is provided on the peripheral edge of the seat base and is capable of positioning the edge of the inner cover, and its specific configuration is not limited to that shown in the above-mentioned embodiment.

[0115] The inner cover may be made of various sheet materials and is not limited to those mainly made of nonwoven fabric.

[0116] The edge portion of the inner cover is not limited to a so-called string-fastening type, but may be configured to be biased in the direction of diameter contraction by rubber or the like, for example.

[0117] 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]

[0118] A...Support frame B…za D…Seat body E...Seat cover 3...Seat frame 4... Seat base 5... Seat cushion 6...Inner cover 7...Seat cover body 8...Connector

Claims

1. A chair having a seat supported by a support frame, The seat comprises a seat body and a seat cover that covers the upper and outer parts of the seat body, The seat body comprises a seat base made of synthetic resin, a seat cushion supported by the seat base, and an inner cover covering the upper and outer parts of the seat cushion, a positioning means for positioning an edge of the inner cover on a peripheral edge of the seat base; The seat cover can cover the positioning means and the edge of the inner cover so that they are not visible from the outside.

2. 2. The chair according to claim 1, wherein the positioning means is capable of positioning the edge portion of the inner cover by restricting inward and downward movement of the edge portion.

3. 3. The chair according to claim 2, wherein said positioning means comprises an upright wall disposed on said peripheral edge and a plurality of protrusions projecting outward from said upright wall.

4. The upright wall is disposed over the entire peripheral edge portion, 4. The chair according to claim 3, wherein the plurality of protrusions are arranged at regular intervals on the upright wall.

5. 5. The chair according to claim 4, wherein said seat base includes a flange-like portion extending outward from the upper edge of said upright wall and supporting the peripheral edge of said seat cushion.

6. The chair of claim 5, wherein the inner cover is arranged to wrap around the underside of the seat cushion and the flange-shaped portion of the seat base, and the edge portion of the inner cover is tightened by a string member and positioned by the upright wall and the protrusion.

7. 2. The chair according to claim 1, wherein the inner cover is mainly made of nonwoven fabric.

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