JP2021065605A - Chair - Google Patents

Abstract

To easily form a seat.SOLUTION: A chair 1 according to an embodiment includes: a seat 2 having an elastically-deformable sheet-like fabric with a seating surface on which a user can be seated, and a pair of rods 15 spaced apart in a right-left direction and between which the fabric is attached; and a support structure 3 having a pair of seat support parts 37 spaced apart in a right-left direction and rotationally supporting the seat 2 about a shaft along the right-left direction. The seat 2 includes supported parts 13 each projecting from the rod 15 toward each seat support part 37 and rotationally supported about the shaft. The rod 15 includes a first engagement groove 15a that is open outward in the right-left direction such as to be engageable with the fabric and in a range not overlapping with the supported part 13. The seat 2 includes groove forming members 70 each of which is attached to a position facing the supported part 13 in the rod 15, and provided in an inner side in the right-left direction with respect to the supported part 13 in a range including the range overlapping with the supported part 13 when viewed in the right-left direction, and each of which has a second engagement groove 70a that is continuous with the first engagement groove 15a.SELECTED DRAWING: Figure 3

Description

The present invention relates to a chair.

Conventionally, in a chair, a seat-like seat surface component having a seating surface on which a seater can sit and elastically deformable, and a pair of rod members on which the seat surface component is erected separated in the width direction of the chair. Is known to include a seat having a seat and a support structure having a pair of seat support portions that are separated in the width direction and rotatably support the seat around an axis along the width direction.
For example, in Patent Document 1, the seat body includes a pair of seat-side fixing pieces corresponding to a pair of dorsal-side connecting pieces of the backrest. The seat body is made rotatable around the shaft body by being connected to the dorsal side connecting piece through a shaft body extending in the left-right direction through the seat side fixing piece. The seat body is a region in which a sheet-like member serving as a seating surface is attached to a region surrounded by a quadrangular frame body in a plan view. The frame body is a stack of a front side frame body and a back side frame body in the front and back directions. The sheet-shaped member is attached to the front frame.
In the seat formed by stretching the seat-shaped seat surface constituent member on the frame body in this way, the seat surface constituent member is formed by engaging the peripheral edge portion of the seat surface constituent member with the engaging groove of the frame body. Is generally stretched on the frame.

Japanese Unexamined Patent Publication No. 2015-1989901

However, since the seat-side fixing piece stands above the seat-shaped member, a method of providing an engaging groove on the outer periphery of the frame body and engaging the peripheral edge portion of the seat-shaped member with the engaging groove of the frame body is used. It is not easy to adopt. On the other hand, if an engagement groove is to be provided in a portion inside the seat side fixing piece of the frame body, the seat side fixing piece is located in the drawing direction of the mold for opening the engagement groove, so that the same mold is used. Depending on the case, it may not be possible to mold at once. In this case, since the molding process is increased by one step, there is room for improvement in easily molding the seat.

In view of the above circumstances, an object of the present invention is to provide a chair in which a seat can be easily formed.

In the chair according to one aspect of the present invention, a seat-shaped seating surface component having a seating surface on which a seater can be seated and elastically deformable, and the seating surface component member separated in the width direction of the chair are erected. A seat having a pair of members and a support structure having a pair of seat support portions that are separated from each other in the width direction and rotatably support the seat around an axis along the width direction. The seat includes a supported portion that projects from the chair member toward the seat support portion and is rotatably supported around the shaft, and the chair member is capable of engaging the seat surface constituent member. It has a first engaging groove that opens outward in the width direction within a range that does not overlap with the supported portion when viewed from the width direction, and the seat is attached to a portion of the chair material facing the supported portion. It has a second engaging groove that is provided inside the supported portion in the width direction and is continuous with the first engaging groove in a range including a range that overlaps with the supported portion when viewed from the width direction. It is characterized by including a groove forming member.

According to this configuration, the first engaging groove is opened in a range that does not overlap with the supported portion when viewed from the width direction, so that the supported portion is opened in the die drawing direction for opening the first engaging groove. Is not located. Therefore, by sliding the mold in the same direction, the supported portion and the first engaging groove can be molded at the same time by the same mold. Therefore, the seat can be easily formed.
In addition, since the groove forming member attached to the rod material has the second engaging groove continuous with the first engaging groove, the peripheral edge portion of the seat surface constituent member is formed into the first engaging groove and the second engaging groove. Since it can be engaged along the above, the seat surface component can be quickly stretched.

In one aspect of the present invention, a gap equal to or greater than the thickness of the seat surface constituent member may be formed between the supported portion and the groove forming member.
According to this configuration, the gap between the supported portion and the groove forming member can be used as a work space when the peripheral edge portion of the seat surface constituent member is engaged with the second engaging groove. The seat surface component can be quickly stretched.

In one aspect of the present invention, the rod member extends in a direction intersecting the width direction, and the seat is an end portion of the pair of rod members on the side of the seat support portion in the direction in which the rod member extends. A widthwise extending portion that connects the two to each other and extends in the width direction may be further provided, and the supported portion may be provided at a connecting portion between the rod member and the widthwise extending portion.
According to this configuration, the supported portion is rotatably supported around an axis along the width direction, so that the supported portion is required to have a large rigidity. By being provided at the connecting portion with the directional extending portion, the rigidity of the supported portion can be ensured.

In one aspect of the present invention, the groove forming member is a portion of the rod member on the side of the seat support portion, a connecting portion between the rod member and the widthwise extending portion, and the widthwise extending portion. It may be provided over the end portion in the width direction.
According to this configuration, since the connecting portion between the rod member and the extending portion in the width direction is provided with a supported portion, a large rigidity is required in the peripheral portion of the connecting portion, but the groove forming member is a rod. By providing the material over the end portion on the side of the seat support portion, the connecting portion, and the end portion in the width direction of the extending portion in the width direction, the rigidity of the peripheral portion of the connecting portion can be ensured.

In one aspect of the present invention, the groove forming member is a portion of the rod member on the side of the seat support portion, a connecting portion between the rod member and the widthwise extending portion, and the widthwise extending portion. It may be fixed by a fastening member to each of the end portions in the width direction.
According to this configuration, the groove forming member can be firmly fixed.

In one aspect of the present invention, the groove forming member has a plurality of insertion holes for inserting the fastening member, and the plurality of insertion holes may be opened in the same direction.
According to this configuration, by sliding the mold in the same direction, a plurality of insertion holes can be molded at once by the same mold. Therefore, the groove forming member can be easily formed.

In one aspect of the present invention, the seat further includes a cover that covers the rod member and the widthwise extending portion from the side of the seating surface, and the groove forming member is the rod member and the widthwise extending portion. And may have an outer surface continuous with the surface of the cover on the side of the seating surface.
According to this configuration, when the peripheral edge portion of the seat surface constituent member is engaged with the second engaging groove, the seat surface constituent member can be pulled along the outer surface of the groove forming member, so that the seat surface constituent member can be pulled. It can be installed quickly.

According to the present invention, the seat can be easily formed.

The perspective view of the chair which concerns on embodiment. The front view of the chair which concerns on embodiment. The left side view of the chair according to the embodiment. Top view of the chair according to the embodiment. The bottom view of the chair according to the embodiment. The left side view of the stored state of the seat which concerns on embodiment. Top view of the right rear corner of the seat according to the embodiment. Top view of FIG. 7 with the arm cover removed. FIG. 8 is a top view of a state in which the groove forming member is removed. The front view including the XX cross section of FIG. The front view including the XI-XI cross section of FIG. Front view including a cross section of XII-XII of FIG. Left side view including XIII-XIII cross section of FIG. 7. The operation explanatory view of the engaging claw which concerns on embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each figure, the same reference numerals are given to the same configurations. In the embodiment, as an example of the chair, the width of the chair is between a seat having a seating surface on which the seated person can be seated and a used state in which the seated person can be seated and a stored state in which the seat is raised with respect to the used state. A chair provided with a support structure that rotatably supports around an axis along a direction will be described. In the embodiment, the installation surface on which the chair is installed is a horizontal surface.

[Chair]
As shown in FIG. 1, the chair 1 includes a seat 2, a support structure 3, a backrest 4, and an armrest 5. The seat 2, the backrest 4, and the armrest 5 are supported by the support structure 3. 1 to 5 show a usage state of the seat 2. FIG. 6 shows the stored state of the seat 2.

In the following description, unless otherwise specified, the orientations such as front-back, up-down, left-right, etc. are defined as "front" on the front side of the seated person seated in the normal posture on the seat 2 in the used state of the chair 1 installed on the horizontal plane. The other side will be described as "after". That is, the direction orthogonal to the paper surface shown in FIG. 2 is defined as the "front-back direction (depth direction of the chair 1)". Further, the normal direction (vertical direction) of the horizontal plane is defined as the "vertical direction (height direction of the chair 1)". Further, the direction orthogonal to each of the front-rear direction and the up-down direction is defined as the "left-right direction (width direction of the chair 1)". In the figure, the front is indicated by an arrow FR, the upper part is indicated by an arrow UP, and the left side is indicated by an arrow LH.

[seat]
As shown in FIG. 1, the seat 2 includes an upholstery 10 (seat surface constituent member) having a seating surface 10a on which a seater can sit, a rectangular frame-shaped seat frame 11 on which the upholstery 10 is stretched, and the like. A seat-side connecting member 12 extending in the left-right direction, a supported portion 13 rotatably supported around a shaft 9 (see FIG. 12), and an inner peripheral cover 50 (cover, FIG. 4), an arm cover 60 that covers the supported portion 13, and a groove forming member 70 (see FIG. 4) arranged in a range facing the supported portion 13. In the seat 2, the seat side connecting member 12 is in contact with the leg side connecting member 31 in the used state. For example, the seat frame 11 and the seat side connecting member 12 are integrally formed of the same member (for example, a resin member).

[Zhangji]
The upholstery 10 has a stretchable (elastically deformable) sheet shape. The outer peripheral portion of the upholstery 10 is supported by the seat frame 11 in a state where the upholstery 10 is pulled in the front-rear direction and the left-right direction. The portion of the upholstery 10 inside the seat frame 11 (seat surface 10a) is elastically deformable in the vertical direction.

For example, the upholstery 10 is stretchably formed by a mesh material. As shown in FIG. 14, the peripheral edge portion 10b of the upholstery 10 is formed in a bag shape. An edge member 14 is inserted and sewn inside the peripheral edge portion 10b of the upholstery 10. The edge member 14 is formed in an elongated flat plate shape made of an elastic synthetic resin. The upholstery 10 extends outward in the left-right direction, and the peripheral edge portion 10b is folded downward by the engaging claw 20. The peripheral edge portion 10b folded downward by the engaging claw 20 extends inward in the left-right direction, is inserted into the engaging groove 15a, and is engaged in the engaging groove 15a.

[Seat frame]
As shown in FIG. 4, the seat frame 11 includes a pair of rod members 15 that are separated from each other in the left-right direction and a pair of horizontal rods 16A and 16B that are separated from each other in the front-rear direction. At the corners of the seat frame 11, a mounted portion 17 to which the groove forming member 70 is mounted is formed (see FIG. 9).

The attached portion 17 is recessed lower than the upper surface of the engaging claw 20 at the corner portion of the seat frame 11 (see FIG. 12). As shown in FIG. 12, the mounted portion 17 has substantially the same height as the installation surface of the supported portion 13 (the lower end position of the supported portion 13). Female screw portions 18A to 18C to which bolts 73 (fastening members, see FIG. 13) can be screwed are formed in the attached portion 17 (see FIG. 9). As shown in FIG. 9, a plurality of female screw portions 18A to 18C (for example, three in the present embodiment) are arranged at intervals in the front-rear direction. The female threaded portions 18A to 18C are opened upward, respectively.

As shown in FIG. 4, the rod material 15 extends in the front-rear direction. The pair of left and right rod members 15 are connected to each other by the seat side connecting member 12. The left and right pair of rods 15 support the left and right ends of the upholstery 10 (see FIG. 1). The stretched ground 10 is stretched between the pair of rods 15 by the end portion of the stretched ground 10 being supported by the rod 15 so as not to fall off (see FIG. 14).
The horizontal rods 16A and 16B extend in the left-right direction. The pair of front and rear horizontal rods 16A and 16B are a first horizontal rod 16A that connects the front ends of the pair of left and right rod members 15, and a second horizontal rod 16B that connects the rear ends of the pair of left and right rod members 15. (Extended part in the width direction). A pair of front and rear horizontal rods 16A and 16B support the ends of the upholstery 10 (see FIG. 1) in the front-rear direction.

As shown in FIG. 10, the rod member 15 has an engaging groove (hereinafter, also referred to as “first engaging groove 15a”) that opens the upholstery 10 outward in the left-right direction so as to be engaged. As shown in FIG. 3, the first engaging groove 15a is formed in the direction in which the rod member 15 extends. The first engaging groove 15a is formed over the entire range in which the peripheral edge portion 10b of the upholstery 10 is arranged along the front-rear direction (the direction in which the rod member 15 extends). The first engaging groove 15a is open to the outside in the left-right direction within a range that does not overlap with the supported portion 13 when viewed from the left-right direction. That is, the rod material 15 does not have the first engaging groove 15a at the portion overlapping the supported portion 13 when viewed from the left-right direction.

As shown in FIG. 10, the rod member 15 has a larger cross-sectional area than the engaging claw 20 that engages the end portion of the upholstery 10 and the engaging claw 20 in a cross-sectional view orthogonal to the direction in which the rod member 15 extends. A reinforcing portion 21 and a reinforcing portion 21 are provided. For example, the engaging claw 20 and the reinforcing portion 21 are integrally formed of the same member (for example, a resin member).

[Engagement claw]
The engaging claw 20 projects outward in the left-right direction so as to apply tension to the outside in the left-right direction with respect to the upholstery 10 (see FIG. 14). The engaging claw 20 includes a standing portion 20a that stands upward from the upper surface of the reinforcing portion 21, and a protruding portion 20b that protrudes outward in the left-right direction from the upper end of the standing portion 20a. In a cross-sectional view in the direction in which the rod member 15 extends, the upper surface of the protruding portion 20b is inclined so as to be located on the lower side toward the inside in the left-right direction. For example, as shown in FIG. 14, the engaging claw 20 is elastically deformed in the arrow direction due to the inward tension of the upholstery 10 in the left-right direction.

[Reinforcement part]
The reinforcing portion 21 is connected to an end portion of the engaging claw 20 opposite to the protruding end. The reinforcing portion 21 is connected to the lower end portion of the standing portion 20a of the engaging claw 20. The length of the reinforcing portion 21 in the left-right direction is larger than the length of the engaging claw 20 in the left-right direction in the cross-sectional view in the direction in which the rod member 15 extends. The vertical length of the reinforcing portion 21 is larger than the vertical length of the engaging claw 20 in the cross-sectional view in the direction in which the rod member 15 extends.

The left-right outer end of the upper surface of the reinforcing portion 21 is located outside the left-right end of the engaging claw 20. The left-right side surface of the reinforcing portion 21 is inclined so as to be located inside in the left-right direction toward the lower side in a cross-sectional view.

The reinforcing portion 21 has a thick portion 22 having a thickness larger than the engaging claw 20 in the vertical direction, a plate-shaped portion 23 having a thickness smaller than the thick portion 22 in the vertical direction, and an upward portion from the plate-shaped portion 23. It includes protruding ribs 24A and 24B.
The thick portion 22 constitutes an outer portion in the left-right direction of the reinforcing portion 21.
The plate-shaped portion 23 extends inward in the left-right direction from the lower end portion of the thick portion 22.

The ribs 24A and 24B are a first rib 24A having a thickness in the left-right direction and a second rib 24B having a thickness in the front-rear direction. The thickness of the first rib 24A and the second rib 24B is preferably substantially the same as the thickness of the plate-shaped portion 23.

The first rib 24A stands upward from the central portion in the left-right direction of the plate-shaped portion 23. The first rib 24A is formed in the direction in which the rod member 15 extends. The height of the first rib 24A is substantially the same in the direction in which the rod member 15 extends.
The second rib 24B is formed between the thick portion 22 and the first rib 24A. A plurality of the second ribs 24B are arranged at intervals in the direction in which the rod member 15 extends. The heights of the plurality of second ribs 24B are substantially the same. A recess 25 corresponding to the downward protrusions 53A and 53B of the inner peripheral cover 50 is formed on the upper portion of the second rib 24B.

[Supported part]
As shown in FIG. 12, the supported portion 13 projects from the rod member 15 toward the seat supporting portion 37. The supported portion 13 is provided at a corner portion of the seat frame 11 (see FIG. 9). The supported portion 13 is provided at a connecting portion between the pair of left and right rod members 15 and the second horizontal rod 16B (see FIG. 4). The supported portion 13 stands upward in the used state of the seat 2. In the side view of FIG. 3, the length of the supported portion 13 in the front-rear direction gradually increases toward the lower side. In the top view of FIG. 9, the length of the supported portion 13 in the left-right direction gradually increases toward the rear side. The supported portion 13 has an insertion hole 13a that opens outward in the left-right direction so that the shaft 9 can be inserted (see FIG. 12).

As shown in FIG. 12, the supported portion 13 has an engaging recess 13b that opens inward in the left-right direction so that the engaging convex portion 63 of the arm cover 60 can be engaged. The engaging recess 13b is recessed from the lower portion of the inner side surface of the supported portion 13 in the left-right direction to the outside in the left-right direction. The inner side surface of the supported portion 13 (the portion above the engaging recess 13b) in the left-right direction is inclined so as to be located inward in the left-right direction toward the lower side.

[Inner circumference cover]
As shown in FIG. 10, the inner peripheral cover 50 is detachably attached to the seat frame 11. In the top view of FIG. 4, the inner peripheral cover 50 has a frame shape along the inner circumference of the seat frame 11. The inner peripheral cover 50 is arranged inside the rod material 15 in the left-right direction. As shown in FIG. 10, the inner peripheral cover 50 covers the reinforcing portion 21 of the rod member 15 from the inside and the upper side in the left-right direction. The inner peripheral cover 50 covers the rod material 15 so that the ribs 24A and 24B of the reinforcing portion 21 are not exposed to the outside. The inner peripheral cover 50 has an outer surface 50f continuous with the upper surface of the rod member 15 (engagement claw 20). In the cross-sectional view of FIG. 10, the outer surface 50f of the inner peripheral cover 50 is inclined so as to be located on the lower side toward the inside in the left-right direction.

The inner peripheral cover 50 includes a first cover portion 51 having a thickness in the vertical direction, a second cover portion 52 having a thickness in the left-right direction, and downward projecting portions 53A and 53B protruding downward from the first cover portion 51. To be equipped. For example, the first covering portion 51, the second covering portion 52, and the downward projecting portions 53A and 53B are integrally formed of the same member (for example, a resin member).

The first cover portion 51 forms the upper surface of the inner peripheral cover 50. The upper surface of the first covering portion 51 is continuous with the upper surface of the engaging claw 20. The first covering portion 51 is inclined so as to be located on the lower side toward the inside in the left-right direction in a cross-sectional view.
The second covering portion 52 forms an inner side surface of the inner peripheral cover 50 in the left-right direction. The second covering portion 52 projects downward from the inner end in the left-right direction of the first covering portion 51 toward the inner end in the left-right direction of the plate-shaped portion 23.

The downward protrusions 53A and 53B are arranged in pairs at intervals in the left-right direction. The pair of downward projecting portions 53A and 53B project downward from the first projecting portion 53A protruding downward from the lateral outer end portion of the first covering portion 51 and the lateral inner end portion of the first covering portion 51. The second protruding portion 53B and the like.

The first protruding portion 53A has a thickness in the left-right direction. The first protruding portion 53A is formed in the direction in which the rod member 15 extends. The protruding height of the first protruding portion 53A is substantially the same in the direction in which the rod member 15 extends.
The second protruding portion 53B is arranged inside the first rib 24A in the left-right direction. A plurality of the second projecting portions 53B are arranged at intervals in the direction in which the rod member 15 extends. The protruding height of the second protruding portion 53B is larger than the protruding height of the first protruding portion 53A. The second protruding portion 53B has a recess 54 to which the convex portion 19 of the rod member 15 can engage.

[Arm cover]
As shown in FIG. 12, the arm cover 60 is detachably attached to the supported portion 13. The arm cover 60 covers the supported portion 13 so as not to overlap with the insertion hole 13a of the shaft 9. The arm cover 60 includes a first cover portion 61 that is continuous from the front surface of the supported portion 13 to the rear surface of the supported portion 13, and a second cover portion 62 that covers the supported portion 13 from the inside in the left-right direction. (See FIG. 7). For example, the first cover portion 61 and the second cover portion 62 are integrally formed of the same member (for example, a resin member).

As shown in FIG. 3, the front portion of the first cover portion 61 covers the supported portion 13 from the front. The lower end of the front portion of the first cover portion 61 is located near the center of the supported portion 13 in the vertical direction. The rear portion of the first cover portion 61 covers the supported portion 13 from the rear. The lower end of the rear portion of the first cover portion 61 is located below the lower end of the front portion of the first cover portion 61. The lower end of the rear portion of the first cover portion 61 is located near the lower end of the supported portion 13.

As shown in FIG. 12, the second cover portion 62 is connected to the inner end of the first cover portion 61 in the left-right direction. The second cover portion 62 has a thickness in the left-right direction. In the top view of FIG. 7, the second cover portion 62 is inclined so as to be located inward in the left-right direction toward the rear side.

As shown in FIG. 12, the second cover portion 62 has an engaging convex portion 63 that can be engaged with the engaging concave portion 13b of the supported portion 13. The engaging convex portion 63 projects from the lower portion of the lateral outer surface (back surface) of the second cover portion 62 in the left-right direction toward the outside in the left-right direction. The protrusion height of the engaging convex portion 63 in the left-right direction is smaller than the distance W1 between the second cover 62 portion and the groove forming member 70.

[Groove forming member]
As shown in FIG. 4, the groove forming member 70 is attached to a portion of the rod member 15 facing the supported portion 13. The groove forming member 70 is arranged inside the supported portion 13 in the left-right direction. As shown in FIG. 3, the groove forming member 70 forms a second engaging groove 70a continuous with the first engaging groove 15a by the upper surface of the attached portion 17 (see FIG. 11). The second engaging groove 70a is provided inside the supported portion 13 in the left-right direction within a range including a range overlapping the supported portion 13 when viewed from the left-right direction, and is continuous with the first engaging groove 15a ( (See FIG. 3).

In the top view of FIG. 8, a gap S1 having a thickness equal to or larger than that of the upholstery 10 is formed between the supported portion 13 and the groove forming member 70. For example, the size of the gap S1 is set to be equal to or larger than the thickness of the peripheral edge portion 10b of the upholstery 10 (see FIG. 14 including the edge member 14 sewn inside the peripheral edge portion 10b).

As shown in FIG. 7, the groove forming member 70 is provided over the rear end portion of the rod member 15, the connecting portion between the rod member 15 and the second horizontal rod 16B, and the left-right end portion of the second horizontal rod 16B. ing. The groove forming member 70 extends across the rear end portion of the rod member 15 and the left-right end portion of the second horizontal rod 16B with the connecting portion between the rod member 15 and the second horizontal rod 16B interposed therebetween. The groove forming member 70 has an outer surface 70f continuous with the upper surface of the rod member 15, the second horizontal rod 16B, and the inner peripheral cover 50.

As shown in FIG. 11, the groove forming member 70 includes an engaging collar 71 that engages the end portion of the upholstery 10. The engaging collar 71 projects outward in the left-right direction so as to apply tension to the outside in the left-right direction with respect to the upholstery 10. The engaging collar 71 is continuous with the engaging claw 20 in the front-rear direction (see FIG. 3). A second engaging groove 70a continuous with the first engaging groove 15a is formed by the lower surface of the engaging collar 71 and the upper surface of the mounted portion 17. In the cross-sectional view of FIG. 11, the upper surface of the engaging collar 71 is inclined so as to be located downward toward the inside in the left-right direction.

As shown in FIG. 13, the groove forming member 70 is provided at the rear end portion of the rod member 15, the connecting portion between the rod member 15 and the second horizontal rod 16B, and the left and right end portions of the second horizontal rod 16B. It is fixed with a bolt 73. The groove forming member 70 has a plurality of (for example, three in this embodiment) insertion holes 72A to 72C for inserting the shaft portion of the bolt 73 (see FIG. 7).

As shown in FIG. 7, the three insertion holes 72A to 72C are opened in the same direction. The insertion holes 72A to 72C open the upper surface of the groove forming member 70 in the vertical direction. The three insertion holes 72A to 72C are arranged at substantially the same distance in the front-rear direction (the direction in which the groove forming member 70 extends).

For example, after attaching the inner peripheral cover 50 to the seat frame 11, the groove forming member 70 is placed on the attached portion 17. After that, the shaft portion of the bolt 73 is inserted into each insertion hole 13a of the groove forming member 70, and is screwed into the female thread portions 18A to 18C (see FIG. 9) of the attached portion 17. As a result, the groove forming member 70 can be attached to the attached portion 17.

[Support structure]
As shown in FIG. 1, the support structure 3 includes a pair of left and right leg constituent members 30, and a leg-side connecting member 31 that connects the pair of left and right leg constituent members 30 to each other.
The leg component 30 includes a front leg portion 35, a rear leg portion 36 located behind the front leg portion 35, a seat support portion 37 that pivotally supports both left and right side portions behind the seat 2, and left and right end portions of the backrest 4. It is provided with a back support portion 38 for supporting the above.

In the side view of FIG. 3, the front leg portion 35 extends so as to be positioned forward toward the lower side.
The hind legs 36 extend so as to be located rearward toward the lower side. The rear end of the front leg 35 is connected to the vicinity of the center of the rear leg 36 in the vertical direction.
Caster 39s are attached to the lower ends of the front leg portion 35 and the rear leg portion 36.

The seat support portion 37 is provided above the connecting position of the front leg portion 35 on the rear leg portion 36. The seat support portion 37 extends forward from the rear leg portion 36.
As shown in FIG. 1, the back support portion 38 extends upward from the upper end of the rear leg portion 36. The back support portion 38 is inserted into openings (not shown) at both left and right ends of the backrest 4. The back support portion 38 is screwed to the backrest 4 from the side together with the armrest 5.

[Action effect]
As described above, in the chair 1 according to the above embodiment, a seat-shaped upholstery 10 having a seating surface 10a on which a seater can be seated and elastically deformable, and an upholstery 10 separated in the left-right direction are erected. A seat 2 having a pair of elastic members 15 and a support structure 3 having a pair of seat support portions 37 that are separated in the left-right direction and rotatably support the seat 2 around an axis 9 along the left-right direction. The seat 2 includes a supported portion 13 that projects from the rod member 15 toward the seat support portion 37 and is rotatably supported around the shaft 9, and the rod member 15 engages the upholstery 10. The seat 2 has a first engaging groove 15a that opens outward in the left-right direction within a range that does not overlap with the supported portion 13 when viewed from the left-right direction, and the seat 2 is a portion of the rod material 15 that faces the supported portion 13. A second engaging groove 70a that is attached to the inside of the supported portion 13 in the left-right direction and is continuous with the first engaging groove 15a within a range that includes a range that overlaps with the supported portion 13 when viewed from the left-right direction. The groove forming member 70 is provided.

According to this configuration, the first engaging groove 15a is opened in a range that does not overlap with the supported portion 13 when viewed from the left-right direction, so that the first engaging groove 15a can be opened in the die drawing direction. The supported portion 13 is not located. Therefore, by sliding the mold in the same direction, the supported portion 13 and the first engaging groove 15a can be molded at once by the same mold. Therefore, the seat can be easily formed.
In addition, the groove forming member 70 attached to the rod material 15 forms a second engaging groove 70a continuous with the first engaging groove 15a, so that the peripheral edge portion 10b of the upholstery 10 is formed by the first engaging groove 15a. And since it can be engaged along the second engaging groove 70a, the upholstery 10 can be quickly stretched.

In the above embodiment, a gap S1 having a thickness equal to or larger than that of the upholstery 10 is formed between the supported portion 13 and the groove forming member 70.
According to this configuration, the gap S1 between the supported portion 13 and the groove forming member 70 is used as a work space when the peripheral edge portion 10b of the upholstery 10 is engaged with the second engaging groove 70a. Therefore, the upholstery 10 can be quickly stretched.

In the above embodiment, the rod member 15 extends in a direction orthogonal to the left-right direction, and the seat 2 connects the ends of the pair of rod members 15 on the seat support portion 37 side in the extending direction. A second horizontal rod 16B extending in the left-right direction is provided, and the supported portion 13 is provided at a connecting portion between the rod member 15 and the second horizontal rod 16B.
According to this configuration, the supported portion 13 is required to have a large rigidity due to the function of being rotatably supported around the shaft 9 along the left-right direction, but the supported portion 13 is supported. By being provided at the connecting portion between the rod member 15 and the second horizontal rod 16B, the rigidity of the supported portion 13 can be ensured.

In the above embodiment, the groove forming member 70 is the end portion of the rod member 15 on the seat support portion 37 side, the connecting portion between the rod member 15 and the second horizontal rod 16B, and the left-right end of the second horizontal rod 16B. It is provided over the department.
According to this configuration, since the connecting portion between the rod member 15 and the second horizontal rod 16B is provided with the supported portion 13, a large rigidity is required in the peripheral portion of the connecting portion, but the groove forming member The rigidity of the peripheral portion of the connecting portion is ensured by providing the 70 over the end portion of the rod member 15 on the side of the seat support portion 37, the connecting portion, and the lateral end portion of the second horizontal rod 16B. Can be done.

In the above embodiment, the groove forming member 70 is the end portion of the rod member 15 on the seat support portion 37 side, the connecting portion between the rod member 15 and the second horizontal rod 16B, and the left-right end of the second horizontal rod 16B. Each part is fixed with a bolt 73.
According to this configuration, the groove forming member 70 can be firmly fixed.

In the above embodiment, the groove forming member 70 has a plurality of insertion holes 72A to 72C for inserting the bolt 73, and the plurality of insertion holes 72A to 72C are opened in the same direction, respectively.
According to this configuration, by sliding the mold in the same direction, a plurality of insertion holes 72A to 72C can be molded at once by the same mold. Therefore, the groove forming member 70 can be easily formed.

In the above embodiment, the seat 2 includes an inner peripheral cover 50 that covers the rod member 15 and the second horizontal rod 16B from the side of the seating surface 10a, and the groove forming member 70 includes the rod member 15, the second horizontal rod 16B, and the inner portion. It has an outer surface 70f that is continuous with the surface of the peripheral cover 50 on the side of the seating surface 10a.
According to this configuration, when the peripheral edge portion 10b of the upholstery 10 is engaged with the second engaging groove 70a, the upholstery 10 can be pulled along the outer surface 70f of the groove forming member 70, so that the upholstery 10 can be pulled. Can be quickly installed.

[Modification example]
Although the preferred embodiment of the present invention has been described above with reference to the drawings, the present invention is not limited to the above embodiment. The various shapes and combinations of the constituent members shown in the above-described embodiment are examples, and can be variously changed based on design requirements and the like within a range that does not deviate from the gist of the present invention.

In the above embodiment, an example in which the surface on which the chair 1 is installed is a horizontal plane has been described, but the present invention is not limited to this. For example, the chair may be installed on an inclined surface or a vertical surface that is inclined with respect to a horizontal plane.

In the above embodiment, the rod member 15 extends in a direction orthogonal to the left-right direction, and the seat 2 connects the ends of the pair of rod members 15 on the seat support portion 37 side in the extending direction. A second horizontal rod 16B extending in the left-right direction is provided, and the supported portion 13 has been described with reference to an example provided at a connecting portion between the rod member 15 and the second horizontal rod 16B, but the present invention is not limited to this. For example, the rod material 15 may extend in a direction diagonally intersecting with the left-right direction. For example, the supported portion 13 may be provided only in a part in the direction in which the rod member 15 extends. For example, the supported portion 13 may be provided only in a part in the direction in which the second horizontal rod 16B extends.

In the above embodiment, the groove forming member 70 is the end portion of the rod member 15 on the seat support portion 37 side, the connecting portion between the rod member 15 and the second horizontal rod 16B, and the left-right end of the second horizontal rod 16B. Although the explanation has been given by giving an example provided over the parts, the present invention is not limited to this. For example, the groove forming member 70 may be provided only at the connecting portion between the rod member 15 and the second horizontal rod 16B. For example, the groove forming member 70 may be provided at a portion of the rod member 15 facing the supported portion 13.

In the above embodiment, the groove forming member 70 is the end portion of the rod member 15 on the seat support portion 37 side, the connecting portion between the rod member 15 and the second horizontal rod 16B, and the left-right end of the second horizontal rod 16B. Although the explanation has been given by giving an example in which each part is fixed with a bolt 73, the present invention is not limited to this. For example, the groove forming member 70 is not limited to being fixed by a plurality of bolts 73, and may be fixed by a single bolt 73. For example, the groove forming member 70 may be fixed by a fixing member other than the bolt 73.

In the above embodiment, the groove forming member 70 has a plurality of insertion holes 72A to 72C for inserting the bolt 73, and the plurality of insertion holes 72A to 72C are opened in the same direction, respectively. I explained, but it is not limited to this. For example, the plurality of insertion holes 72A to 72C may be opened in different directions.

In the above embodiment, the seat 2 includes an inner peripheral cover 50 that covers the rod member 15 and the second horizontal rod 16B from the side of the seating surface 10a, and the groove forming member 70 includes the rod member 15, the second horizontal rod 16B, and the inner portion. An example of having an outer surface 70f continuous with the surface of the peripheral cover 50 on the side of the seating surface 10a has been described, but the description is not limited to this. For example, the seat 2 does not have to have the inner peripheral cover 50. For example, the outer surface 70f of the groove forming member 70 does not have to be continuous with the surface of the rod member 15, the second horizontal rod 16B, and the inner peripheral cover 50 on the seating surface 10a side.

1 ... chair, 2 ... seat, 3 ... support structure, 9 ... shaft, 10 ... upholstery (seat surface component), 10a ... seating surface, 13 ... supported part, 15 ... rod material, 15a ... 1st section Joint groove, 16B ... 2nd horizontal rod (extending portion in the width direction), 37 ... seat support portion, 50 ... inner peripheral cover (cover), 70 ... groove forming member, 70f ... outer surface of groove forming member, 70a ... second Engagement groove, 72A to 72C ... Insertion hole, 73 ... Bolt (fastening member), S1 ... Gap

Claims (7)

A seat having a seat-like seat surface component having a seating surface on which a seater can be seated and elastically deformable, and a pair of rod members separated from each other in the width direction of the chair on which the seat surface component is erected. ,
A support structure having a pair of seat support portions that are separated in the width direction and rotatably support the seat around an axis along the width direction.
The seat comprises a supported portion that projects from the rod member toward the seat support portion and is rotatably supported around the shaft.
The rod member has a first engaging groove that opens outward in the width direction within a range that does not overlap with the supported portion when viewed from the width direction so that the seat surface constituent member can be engaged.
The seat is attached to a portion of the chair material that faces the supported portion, and is inside the supported portion in the width direction within a range including a range that overlaps the supported portion when viewed from the width direction. A chair provided with a groove forming member having a second engaging groove continuous with the first engaging groove. The chair according to claim 1, wherein a gap equal to or larger than the thickness of the seat surface constituent member is formed between the supported portion and the groove forming member. The rod material extends in a direction intersecting the width direction, and is
The seat further includes a widthwise extending portion extending in the width direction by connecting the ends of the pair of rod members on the side of the seat supporting portion in the direction in which the rod member extends.
The chair according to claim 1 or 2, wherein the supported portion is provided at a connecting portion between the rod member and the extending portion in the width direction. The groove forming member extends over the end portion of the chair member on the side of the seat support portion, the connecting portion between the chair member and the width direction extending portion, and the width direction end portion of the width direction extending portion. The chair according to claim 3, wherein the chair is provided. The groove forming member is an end portion of the chair member on the side of the seat support portion, a connecting portion between the chair member and the width direction extending portion, and the width direction end portion of the width direction extending portion. The chair according to claim 4, wherein each chair is fixed with a fastening member. The groove forming member has a plurality of insertion holes for inserting the fastening member.
The chair according to claim 5, wherein the plurality of insertion holes are opened in the same direction. The seat further includes a cover that covers the rod material and the widthwise extending portion from the side of the seating surface.
The groove-forming member according to any one of claims 3 to 6, wherein the groove-forming member has an outer surface continuous with the rod member, the widthwise extending portion, and the surface of the cover on the side of the seating surface. Chair.

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