JP7381291B2 - Chair - Google Patents

Description

The present invention relates to a chair.

Conventionally, in a chair, a seat component in the form of an elastically deformable sheet having a seating surface on which a seated person can sit, a pair of rod members spaced apart in the width direction of the chair and on which the seat component is constructed, A support structure is known that includes a seat having a width direction, and a support structure including a pair of seat support portions that are spaced apart in the width direction and support the seat rotatably about an axis along the width direction.
For example, in Patent Document 1, the seat body includes a pair of seat-side fixing pieces that correspond to a pair of back-side connecting pieces of the backrest. The seat body is rotatable around the shaft body by being connected to the back side connecting piece through the seat side fixing piece through a shaft body extending in the left-right direction. The seat body has a sheet-like member serving as a seating surface stretched over an area surrounded by a rectangular frame body in plan view. The frame is made up of a front side frame body and a back side frame body stacked on top of each other in the front and back direction. The sheet-like member is stretched over the front frame.
In a seat constructed by stretching a sheet-like seat component on a frame, the seat component can be fixed by engaging the peripheral edge of the seat component with the engagement groove of the frame. It is common to attach it to the frame.

Japanese Patent Application Publication No. 2015-198901

However, if the direction in which the mold is removed for opening the engagement groove and the direction in which the mold is removed for opening the insertion hole of the shaft body are different, it may not be possible to perform molding at the same time using the same mold. In this case, there is room for improvement in easily molding the seat because one additional molding step is required.

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

A chair according to one aspect of the present invention includes a seat component in the form of an elastically deformable sheet having a seating surface on which a seated person can sit, and the seat component being spaced apart in the width direction of the chair. a support structure having a pair of seat supports that are spaced apart in the width direction and rotatably support the seat around an axis along the width direction, The seat includes a supported part that protrudes from the rod material toward the seat support part and is rotatably supported around the shaft, and the supported part is arranged in the width direction so that the shaft can be inserted therethrough. The rod material has an insertion hole that opens outward, and the rod material has an engagement groove that opens outward in the width direction and is capable of engaging the seat component, and the rod material is made of one member. It constitutes a seat frame, and the engagement groove is characterized in that it is formed in the rod material itself .
A chair according to one aspect of the present invention includes a seat component in the form of an elastically deformable sheet having a seating surface on which a seated person can sit, and the seat component being spaced apart in the width direction of the chair. a support structure having a pair of seat supports that are spaced apart in the width direction and rotatably support the seat around an axis along the width direction, The seat includes a supported part that protrudes from the rod material toward the seat support part and is rotatably supported around the shaft, and the supported part is arranged in the width direction so that the shaft can be inserted therethrough. The rod material has an insertion hole that opens outward, and the rod material has an engagement groove that opens outward in the width direction and is capable of engaging the seat component, and the rod material has an engagement groove that opens outward in the width direction, and the rod material An engaging claw protrudes outward in the width direction so as to apply tension outward in the width direction to the member, and the rod has an end opposite to a protruding end of the engaging claw. further comprising a reinforcing portion connected to the rod member and having a larger cross-sectional area than the engaging pawl in a cross-sectional view perpendicular to the direction in which the rod material extends, the seat being disposed inside the rod member in the width direction; The vehicle may further include a cover that covers the reinforcing portion from the inner side in the width direction and from the seating surface side.

According to this configuration, the insertion hole and the engagement groove open outward in the same width direction, and by sliding the mold in the same direction, the insertion hole and the engagement groove can be molded at once with the same mold. be able to. Therefore, the seat can be easily formed.

In one aspect of the present invention, the rod material may extend in a direction intersecting the width direction, and the engagement groove may be formed in the direction in which the rod material extends.
According to this configuration, by engaging the edge of the seat component with the engagement groove extending in the direction in which the rod material extends, there is no need to provide a mounting hole etc. in the seat component, so the seat The strength of the constituent members can be maintained and the appearance can be improved.

In one aspect of the present invention, the rod material may include an engaging pawl that protrudes outward in the width direction so as to apply tension outward in the width direction to the seat component. .
According to this configuration, elastic deformation of the engaging pawl in the height direction of the seat can be caused by the tension of the seat component (inward tension in the width direction), so that It can provide a soft seating feeling.

In one aspect of the present invention, the rod material is connected to an end opposite to the protruding end of the engaging claw, and has a cross-sectional area larger than that of the engaging claw in a cross-sectional view perpendicular to the direction in which the rod material extends. It may further include a reinforcing portion with a large value.
According to this configuration, the rod material is required to have great rigidity due to the function of constructing the seat component, but the reinforcing portion is engaged with the engagement claw in a cross-sectional view perpendicular to the extending direction of the rod material. By having a larger cross-sectional area than the above, it is possible to ensure the rigidity of the rod material. In addition, since the reinforcing portion has higher rigidity than the engaging pawl, it becomes easier to cause the engaging pawl to elastically deform in the height direction of the seat, giving the seated person a soft seating feeling when sitting. Cheap.

In one aspect of the present invention, the seat may further include a cover that is disposed inside the rod material in the width direction and covers the reinforcing portion from the inside in the width direction and from the seating surface side.
According to this configuration, since the reinforcing portion is hidden by the cover, the appearance can be improved. In addition, by making the cover function as a reinforcing member for the rods, the rigidity of the rods can be ensured.

In one aspect of the present invention, the cover has an outer surface that is continuous with a surface on the seating surface side of the rod material, and in a cross-sectional view perpendicular to the direction in which the rod material extends, the outer surface of the cover includes: The seat plate may be inclined so as to be located on a side opposite to the seating surface as it goes inward in the width direction.
According to this configuration, when the seated person is seated, the outer part in the width direction of the seat component member can be easily displaced along the slope of the outer surface of the cover to the side opposite to the seating surface. Easy to give a comfortable sitting feeling.

In one aspect of the present invention, the engagement groove of the rod material is provided in a range that does not overlap with the supported part when viewed from the width direction, and the seat is arranged in a range that does not overlap with the supported part when viewed from the width direction. A groove forming member that is attached to the rod material and has a second engagement groove that is provided on the inner side in the width direction with respect to the supported part and that is continuous with the engagement groove of the rod material in an overlapping range. It may further include.
According to this configuration, the engaging groove of the rod material is opened at a position that does not overlap with the supported part when viewed from the width direction, so that the engaging groove of the rod material is opened in the cutting direction of the mold for opening the engaging groove of the rod material. The support part is not located. Therefore, by sliding the molds in the same direction, the engaging groove and the supported portion of the rod material can be molded at the same time using the same mold. Therefore, the seat can be easily formed.
In addition, the groove forming member attached to the rod has a second engagement groove that is continuous with the engaging groove of the rod, so that the peripheral edge of the seat component can be connected to the engaging groove of the rod and the groove forming member. Since the seat member can be engaged along the second engagement groove, the seat component can be quickly tensioned.

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

FIG. 1 is a perspective view of a chair according to an embodiment. FIG. 2 is a front view of the chair according to the embodiment. FIG. 2 is a left side view of the chair according to the embodiment. FIG. 2 is a top view of the chair according to the embodiment. FIG. 2 is a bottom view of the chair according to the embodiment. FIG. 3 is a left side view of the seat in the stored state according to the embodiment. FIG. 3 is a top view of the right rear corner of the seat according to the embodiment. FIG. 8 is a top view of FIG. 7 with the arm cover removed. FIG. 9 is a top view of FIG. 8 with the groove forming member removed. FIG. 8 is a front view including a cross section taken along line XX in FIG. 7; 8 is a front view including a cross section taken along the line XI-XI in FIG. 7. FIG. 8 is a front view including a cross section taken along line XII-XII in FIG. 7. FIG. The left side view including the XIII-XIII cross section of FIG. FIG. 4 is an explanatory diagram of the action of the engaging claw according to the embodiment.

Embodiments of the present invention will be described below with reference to the drawings. In each figure, the same components are given the same reference numerals. In the embodiment, as an example of a chair, a seat having a seating surface on which a seated person can sit, and a width of the chair between a used state where the seated person can sit and a stored state in which the seat is erected with respect to the used state. A chair including a support structure rotatably supported 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 armrests 5. The seat 2, backrest 4 and armrests 5 are supported by a support structure 3. 1 to 5 show the seat 2 in use. FIG. 6 shows the seat 2 in its stored state.

In the following explanation, unless otherwise specified, the front, back, top, bottom, left, right, etc. directions of a seated person who is seated in a normal posture on the seat 2 of the chair 1 installed on a horizontal surface in the used state are "front", The opposite side will be described as the "back". In other words, the direction perpendicular to the plane of the paper shown in FIG. 2 is defined as the "back-and-forth direction (the 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 a "left-right direction (width direction of the chair 1)". In the figure, the forward direction is indicated by an arrow FR, the upward direction is indicated by an arrow UP, and the left direction is indicated by an arrow LH.

[seat]
As shown in FIG. 1, the seat 2 includes an upholstery 10 (seat surface component) having a seating surface 10a on which a person can sit, a rectangular seat frame 11 on which the upholstery 10 is stretched. A seat-side connecting member 12 extending in the left-right direction, a supported portion 13 rotatably supported around the shaft 9 (see FIG. 12), and an inner circumferential cover 50 (cover, 4), an arm cover 60 that covers the supported part 13, and a groove forming member 70 (see FIG. 4) disposed in a range facing the supported part 13. When the seat 2 is in use, the seat-side connecting member 12 is in contact with the leg-side connecting member 31. 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).

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

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

[Seat frame]
As shown in FIG. 4, the seat frame 11 includes a pair of rod members 15 that are spaced apart in the left-right direction, and a pair of horizontal rods 16A and 16B that are spaced apart in the front-rear direction. An attached portion 17 to which the groove forming member 70 is attached is formed at a corner of the seat frame 11 (see FIG. 9).

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

As shown in FIG. 4, the rod material 15 extends in the front-rear direction. A pair of left and right rod members 15 are connected to each other by a seat side connecting member 12. The left and right ends of the upholstery 10 (see FIG. 1) are supported by a pair of left and right rod members 15. The ends of the upholstery 10 in the stretched state are supported by the rods 15 so that they cannot fall off, so that the upholstery 10 is stretched between the pair of rods 15 (see FIG. 14).
The horizontal rods 16A, 16B extend in the left-right direction. The pair of front and rear horizontal rods 16A, 16B includes a first horizontal rod 16A that connects the front ends of the left and right pairs of rod members 15, and a second horizontal rod 16B (that connects the rear ends of the left and right pairs of rod members 15). widthwise extending portion). The front and rear ends of the upholstery 10 (see FIG. 1) are supported by the front and rear pair of horizontal bars 16A, 16B.

As shown in FIG. 10, the rod material 15 has an engagement groove (hereinafter also referred to as "first engagement groove 15a") that opens outward in the left-right direction so that the upholstery 10 can be engaged with it. As shown in FIG. 3, the first engagement groove 15a is formed in the direction in which the rod material 15 extends. The first engagement groove 15a is formed over the entire range in which the peripheral edge 10b of the upholstery 10 is arranged along the front-rear direction (the direction in which the rod material 15 extends). The first engagement groove 15a 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. That is, the rod material 15 does not have the first engagement groove 15a in a portion that overlaps the supported portion 13 when viewed from the left and right direction.

As shown in FIG. 10, the rod material 15 has a larger cross-sectional area than the engaging claw 20 that engages the end of the upholstery 10 in a cross-sectional view perpendicular to the direction in which the rod material 15 extends. A reinforcing portion 21 is 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 protrudes outward in the left-right direction so as to apply tension outward in the left-right direction to the upholstery 10 (see FIG. 14). The engagement 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 projects 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 material 15 extends, the upper surface of the protruding portion 20b is inclined so as to be located on the lower side as it goes inward in the left-right direction. For example, as shown in FIG. 14, the engaging claw 20 is elastically deformed in the direction of the arrow due to the tension applied to the upholstery 10 inward in the left-right direction.

[Reinforcement part]
The reinforcing portion 21 is connected to an end of the engagement claw 20 opposite to the protruding end. The reinforcing portion 21 is connected to the lower end of the upright portion 20a of the engagement 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 when viewed in cross section in the direction in which the rod material 15 extends. The length of the reinforcing portion 21 in the vertical direction is larger than the length of the engagement claw 20 in the vertical direction when viewed in cross section in the direction in which the rod material 15 extends.

The outer end of the upper surface of the reinforcing portion 21 in the left-right direction is located on the outer side of the protruding end of the engagement claw 20 in the left-right direction. The side surfaces of the reinforcing portion 21 in the left-right direction are inclined so as to be located inward in the left-right direction as they go downward in cross-sectional view.

The reinforcing portion 21 includes a thick portion 22 having a thickness greater than the engaging claw 20 in the vertical direction, a plate portion 23 having a thickness smaller than the thick portion 22 in the vertical direction, and a portion extending upward from the plate portion 23. It includes protruding ribs 24A and 24B.
The thick portion 22 constitutes the outer side of the reinforcing portion 21 in the left-right direction.
The plate-like portion 23 extends from the lower end of the thick portion 22 toward the inside in the left-right direction.

The ribs 24A, 24B are a first rib 24A that is thick in the left-right direction, and a second rib 24B that is thick in the front-rear direction. It is preferable that the thickness of the first rib 24A and the second rib 24B be approximately the same as the thickness of the plate-like portion 23.

The first rib 24A stands upward from the center portion of the plate-like portion 23 in the left-right direction. The first rib 24A is formed across the direction in which the rod material 15 extends. The height of the first rib 24A is substantially the same in the direction in which the rod material 15 extends.
The second rib 24B is formed between the thick portion 22 and the first rib 24A. A plurality of second ribs 24B are arranged at intervals in the direction in which the rod material 15 extends. The heights of the plurality of second ribs 24B are approximately the same. A recess 25 is formed in the upper part of the second rib 24B to correspond to the lower protrusions 53A and 53B of the inner cover 50.

[Supported part]
As shown in FIG. 12, the supported portion 13 protrudes from the rod material 15 toward the seat support portion 37. As shown in FIG. The supported portion 13 is provided at a corner of the seat frame 11 (see FIG. 9). The supported portion 13 is provided at a connecting portion between the left and right pair of rod members 15 and the second horizontal rod 16B (see FIG. 4). The supported portion 13 stands upward when the seat 2 is in use. In the side view of FIG. 3, the length of the supported portion 13 in the front-rear direction gradually increases toward the bottom. In a 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 therethrough (see FIG. 12).

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

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

The inner cover 50 includes a first cover part 51 that is thick in the vertical direction, a second cover part 52 that is thick in the left-right direction, and downward protrusions 53A and 53B that protrude downward from the first cover part 51. Equipped with For example, the first cover part 51, the second cover part 52, and the downward protrusions 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 circumferential cover 50. The upper surface of the first cover portion 51 is continuous with the upper surface of the engaging claw 20. The first cover portion 51 is inclined so as to be located on the lower side as it goes inward in the left-right direction in a cross-sectional view.
The second cover portion 52 forms the inner surface of the inner circumferential cover 50 in the left-right direction. The second cover portion 52 protrudes downward from the inner end of the first cover portion 51 in the left-right direction toward the inner end of the plate-shaped portion 23 in the left-right direction.

A pair of lower protrusions 53A and 53B are arranged at intervals in the left-right direction. The pair of downward protrusions 53A and 53B includes a first protrusion 53A that protrudes downward from the outer end of the first cover part 51 in the left-right direction, and a first protrusion 53A that protrudes downward from the inner end of the first cover part 51 in the left-right direction. and a second protrusion 53B.

The first protrusion 53A has a thickness in the left-right direction. The first protrusion 53A is formed across the direction in which the rod material 15 extends. The protruding height of the first protruding portion 53A is substantially the same in the direction in which the rod material 15 extends.
The second protrusion 53B is arranged inside the first rib 24A in the left-right direction. A plurality of second protrusions 53B are arranged at intervals in the direction in which the rod material 15 extends. The protrusion height of the second protrusion 53B is greater than the protrusion height of the first protrusion 53A. The second protrusion 53B has a recess 54 in which the projection 19 of the rod material 15 can engage.

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

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

As shown in FIG. 12, the second cover part 62 is connected to the inner end of the first cover part 61 in the left-right direction. The second cover portion 62 has a thickness in the left-right direction. In a 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 part 62 has an engagement protrusion 63 that can engage with the engagement recess 13b of the supported part 13. The engagement convex portion 63 protrudes outward in the left-right direction from the lower part of the outer surface (back surface) in the left-right direction of the second cover portion 62. The protruding height of the engagement protrusion 63 in the left-right direction is smaller than the distance W1 between the second cover 62 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 that faces the supported portion 13. As shown in FIG. The groove forming member 70 is arranged inside the supported part 13 in the left-right direction. As shown in FIG. 3, the groove forming member 70 forms a second engagement groove 70a continuous with the first engagement groove 15a by the upper surface of the attached portion 17 (see FIG. 11). The second engagement groove 70a is provided inside the supported part 13 in the left-right direction in a range including an area overlapping with the supported part 13 when viewed from the left-right direction, and is continuous with the first engagement groove 15a ( (See Figure 3).

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

As shown in FIG. 7, the groove forming member 70 is provided across the rear end of the rod 15, the connecting portion between the rod 15 and the second horizontal rod 16B, and the left and right ends of the second horizontal rod 16B. ing. The groove forming member 70 extends across the rear end of the rod 15 and the left-right end of the second horizontal rod 16B, with the connecting portion between the rod 15 and the second horizontal rod 16B interposed therebetween. The groove forming member 70 has an outer surface 70f that is continuous with the upper surface of the rod material 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 of the upholstery 10. The engagement collar 71 protrudes outward in the left-right direction so as to apply tension outward in the left-right direction to the upholstery 10. The engagement collar 71 is continuous with the engagement claw 20 in the front-rear direction (see FIG. 3). A second engagement groove 70a continuous with the first engagement groove 15a is formed by the lower surface of the engagement collar 71 and the upper surface of the attached portion 17. In the cross-sectional view of FIG. 11, the upper surface of the engagement collar 71 is inclined so as to be located on the lower side as it goes inward in the left-right direction.

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

As shown in FIG. 7, the three insertion holes 72A to 72C open 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 approximately the same intervals in the front-rear direction (the direction in which the groove forming member 70 extends).

For example, after attaching the inner cover 50 to the seat frame 11, the groove forming member 70 is placed on the attached portion 17. Thereafter, the shaft portion of the bolt 73 is inserted into each insertion hole 13a of the groove forming member 70, and screwed into the female thread portions 18A to 18C (see FIG. 9) of the attached portion 17. Thereby, 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 components 30 and a leg-side connecting member 31 that connects the pair of left and right leg components 30 to each other.
The leg component 30 includes a front leg part 35, a rear leg part 36 located behind the front leg part 35, a seat support part 37 that pivotally supports both left and right sides of the rear of the seat 2, and both left and right ends of the backrest 4. A back support part 38 that supports the.

In the side view of FIG. 3, the front leg portion 35 extends at an angle so as to be located forward as it goes downward.
The rear leg portion 36 extends in an inclined manner so as to be positioned rearward toward the lower side. The rear end of the front leg portion 35 is connected to the vicinity of the center of the rear leg portion 36 in the vertical direction.
Casters 39 are attached to the lower ends of the front leg section 35 and the rear leg section 36.

The seat support portion 37 is provided above the position where the front leg portion 35 is connected to 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 part 38 extends upward from the upper end of the rear leg part 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 part 38 is screwed to the backrest 4 together with the armrest 5 from the side.

[Effect]
As explained above, the chair 1 according to the above embodiment has a seating surface 10a on which a seated person can sit and an elastically deformable sheet-like upholstery 10, and the upholstery 10 is installed spaced apart in the left-right direction. a pair of rod members 15; , the seat 2 includes a supported portion 13 that protrudes from the rod material 15 toward the seat support portion 37 and is rotatably supported around the shaft 9, and the supported portion 13 allows the shaft 9 to be inserted. The rod member 15 has an insertion hole 13a that opens outward in the left-right direction, and the rod material 15 has an engagement groove 15a that opens outward in the left-right direction and can engage the upholstery 10.

According to this configuration, the insertion hole 13a and the engagement groove 15a open outward in the same left-right direction, and by sliding the mold in the same direction, the insertion hole 13a and the engagement groove 15a can be formed by the same mold. Can be molded at once. Therefore, the seat 2 can be easily formed.

In the embodiment described above, the rod material 15 extends in a direction perpendicular to the left-right direction, and the engagement groove 15a is formed across the direction in which the rod material 15 extends.
According to this configuration, by engaging the edge of the upholstery 10 with the engagement groove 15a extending in the direction in which the rod members 15 extend, there is no need to provide holes for attachment in the upholstery 10, so that the upholstery While maintaining the strength of 10, it is possible to improve the appearance.

In the embodiment described above, the rod material 15 includes engagement claws 20 that protrude outward in the left-right direction so as to apply tension outward in the left-right direction to the upholstery 10.
According to this configuration, elastic deformation of the engagement claws 20 in the vertical direction can be caused by the tension of the upholstery 10 (inward tension in the left-right direction), so that the seated person can have a soft seating position when seated. It can give a feeling.

In the embodiment described above, the rod material 15 is connected to the end of the engaging claw 20 opposite to the protruding end, and has a larger cross-sectional area than the engaging claw 20 in a cross-sectional view perpendicular to the direction in which the rod material 15 extends. A reinforcing portion 21 is provided.
According to this configuration, the rod members 15 are required to have high rigidity due to the function of constructing the upholstery 10, but the reinforcing portions 21 are By having a larger cross-sectional area than the engaging pawl 20, the rigidity of the rod material 15 can be ensured. In addition, since the reinforcing portion 21 has higher rigidity than the engaging claw 20, it becomes easier to cause elastic deformation of the engaging claw 20 in the vertical direction, thereby giving the seated person a soft seating feeling when sitting. Cheap.

In the embodiment described above, the seat 2 includes an inner circumferential cover 50 that is disposed inside the rod material 15 in the left-right direction and covers the reinforcing portion 21 from the inside in the left-right direction and from the side of the seating surface 10a.
According to this configuration, since the reinforcing portion 21 is hidden by the inner circumferential cover 50, the appearance can be improved. In addition, by making the inner circumferential cover 50 function as a reinforcing member for the rod material 15, the rigidity of the rod material 15 can be ensured.

In the embodiment described above, the inner circumferential cover 50 has an outer surface 50f that is continuous with the surface on the seating surface 10a side of the rod material 15, and the outer surface of the inner circumferential cover 50 is 50f is inclined so as to be located on the opposite side from the seating surface 10a as it goes inward in the left-right direction.
According to this configuration, when the seated person is seated, the outer portion of the upholstery 10 in the left-right direction can be easily displaced along the inclination of the outer surface 50f of the inner circumferential cover 50 to the side opposite to the seating surface 10a. Easy to give a soft seating feeling when sitting.

In the embodiment described above, the first engagement groove 15a is provided in a range that does not overlap with the supported part 13 when viewed from the left and right, and the seat 2 is provided in a range that includes a range that overlaps with the supported part 13 when viewed from the left and right. A groove forming member 70 is provided, which has a second engagement groove 70a that is provided inside the supported part 13 in the left-right direction and is continuous with the first engagement groove 15a, and is attached to the rod material 15.
According to this configuration, by opening the first engagement groove 15a at a position that does not overlap with the supported part 13 when viewed from the left and right direction, the first engagement groove 15a is opened at a position that does not overlap with the supported part 13, so that the first engagement groove 15a is opened in a direction in which the mold is removed. The supported part 13 is not located. Therefore, by sliding the molds in the same direction, the supported portion 13 and the first engagement groove 15a can be molded at the same time using the same mold. Therefore, the seat 2 can be easily formed.
In addition, since the groove forming member 70 attached to the rod material 15 has the second engagement groove 70a that is continuous with the first engagement groove 15a, the peripheral edge 10b of the upholstery 10 can be connected to the first engagement groove 15a and the second engagement groove 70a. Since the engagement can be performed along the second engagement groove 70a, the upholstery 10 can be quickly tensioned.

[Modified example]
Although preferred embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited to the above embodiments. The various shapes and combinations of the constituent members shown in the above-described embodiments are merely examples, and can be variously changed based on design requirements and the like without departing from the gist of the present invention.

Although the above embodiment has been described using an example in which the surface on which the chair 1 is installed is a horizontal surface, the present invention is not limited to this. For example, the chair may be placed on an inclined or vertical surface that is inclined relative to a horizontal surface.

In the embodiment described above, the rod material 15 extends in a direction perpendicular to the left-right direction, and the engagement groove 15a is formed over the direction in which the rod material 15 extends. However, the invention is not limited to this. . For example, the rod material 15 may extend in a direction diagonally intersecting the left-right direction. For example, the engagement groove 15a may be formed only in a part of the direction in which the rod material 15 extends. For example, the upholstery 10 may be provided with holes for attachment.

In the above embodiment, the rod material 15 has been described using an example including the engagement claws 20 that protrude outward in the left-right direction so as to apply tension outward in the left-right direction to the upholstery 10. It is not limited to this. For example, the engaging claw 20 does not need to protrude outward in the left-right direction. For example, the engaging claw 20 may protrude toward one side in the up-down direction so as to apply tension outward in the left-right direction to the upholstery 10.

In the embodiment described above, the rod material 15 is connected to the end of the engaging claw 20 opposite to the protruding end, and has a larger cross-sectional area than the engaging claw 20 in a cross-sectional view orthogonal to the direction in which the rod material 15 extends. Although the explanation has been given using an example including the reinforcing portion 21, the present invention is not limited to this. For example, the rod material 15 does not need to have the reinforcing portion 21. For example, the reinforcing portion 21 may be formed of a member having higher rigidity than the engaging claw 20. For example, the rod material 15 is not limited to being molded from a single material, and may be a two-color molded product in which the reinforcing portion 21 is molded from a resin with higher rigidity than the engaging claw 20. For example, the rod material 15 may be formed of a synthetic resin containing reinforcing fibers such as glass fibers, and the reinforcing portion 21 may contain more reinforcing fibers than the engaging claws 20.

In the above embodiment, the seat 2 has been described using an example in which the inner cover 50 is arranged inside the rod material 15 in the left-right direction and covers the reinforcing part 21 from the inside in the left-right direction and from the side of the seating surface 10a. , but not limited to this. For example, the seat 2 may not include the inner circumferential cover 50. For example, the reinforcing portion 21 may be exposed to the outside.

In the embodiment described above, the inner circumferential cover 50 has an outer surface that is continuous with the surface on the seating surface 10a side of the rod material 15, and the outer surface 50f of the inner circumferential cover 50 in a cross-sectional view perpendicular to the direction in which the rod material 15 extends. has been described using an example in which the seat is inclined so as to be located on the side opposite to the seating surface 10a as it goes inward in the left-right direction, but the present invention is not limited to this. For example, in a cross-sectional view perpendicular to the direction in which the rod members 15 extend, the outer surface 50f of the inner circumferential cover 50 may be inclined so as to be located closer to the seating surface 10a as it goes inward in the left-right direction. For example, in a cross-sectional view perpendicular to the direction in which the rod members 15 extend, the outer surface 50f of the inner circumferential cover 50 may have a plane extending in the left-right direction.

In the embodiment described above, the first engagement groove 15a is provided in a range that does not overlap with the supported part 13 when viewed from the left and right, and the seat 2 is provided in a range that includes a range that overlaps with the supported part 13 when viewed from the left and right. An example will be described in which a groove forming member 70 is provided on the inside of the supported part 13 in the left-right direction and has a second engagement groove 70a continuous with the first engagement groove 15a, and is attached to the rod material 15. However, it is not limited to this. For example, the seat 2 may not include the groove forming member 70. For example, the second engagement groove 70a of the groove forming member 70 does not need to be continuous with the first engagement groove 15a of the rod material 15.

DESCRIPTION OF SYMBOLS 1... Chair, 2... Seat, 3... Support structure, 9... Shaft, 10... Upholstery (seat surface component), 10a... Seating surface, 13... Supported part, 13a... Insertion hole, 15... Rod material, 15a...first engagement groove (engagement groove), 20...engagement claw, 21...reinforcement part, 37...seat support part, 50...inner circumference cover (cover), 50f...outer surface of inner circumference cover (outer surface of cover ), 70...Groove forming member, 70a...Second engagement groove

Claims (8)

A seat comprising: an elastically deformable sheet-like seat component having a seating surface on which a seated person can sit; and a pair of rod members spaced apart in the width direction of the chair and on which the seat component is constructed. ,
a support structure having a pair of seat support parts that are spaced apart in the width direction and rotatably support the seat around an axis along the width direction;
The seat includes a supported part that protrudes from the rod toward the seat support part and is rotatably supported around the axis,
The supported part has an insertion hole that opens outward in the width direction so that the shaft can be inserted therethrough;
The rod material has an engagement groove that opens outward in the width direction and is capable of engaging the seat component,
The chair is characterized in that the rod material constitutes a seat frame made of one member, and the engagement groove is formed in the rod material itself. A seat comprising: an elastically deformable sheet-like seat component having a seating surface on which a seated person can sit; and a pair of rod members spaced apart in the width direction of the chair and on which the seat component is constructed. ,
a support structure having a pair of seat support parts that are spaced apart in the width direction and rotatably support the seat around an axis along the width direction;
The seat includes a supported part that protrudes from the rod toward the seat support part and is rotatably supported around the axis,
The supported part has an insertion hole that opens outward in the width direction so that the shaft can be inserted therethrough;
The rod material has an engagement groove that opens outward in the width direction and is capable of engaging the seat component,
The rod material includes an engaging claw that protrudes outward in the width direction so as to apply tension outward in the width direction to the seat component,
The rod material further includes a reinforcing portion that is connected to an end opposite to the protruding end of the engaging pawl and has a larger cross-sectional area than the engaging pawl in a cross-sectional view perpendicular to the direction in which the rod material extends. ,
The chair is characterized in that the seat further includes a cover that is disposed inside the rod material in the width direction and covers the reinforcing portion from the inside in the width direction and from the side of the seating surface. The rod material extends in a direction intersecting the width direction,
The chair according to claim 1 or 2 , wherein the engagement groove is formed in a direction in which the rod material extends. 2. The rod material includes an engaging pawl that protrudes outward in the width direction so as to apply tension outward in the width direction to the seat component. chair. The rod material further includes a reinforcing portion that is connected to an end opposite to the protruding end of the engagement claw and has a larger cross-sectional area than the engagement claw in a cross-sectional view perpendicular to the direction in which the rod material extends. The chair according to claim 4 , characterized in that: The chair according to claim 5 , wherein the seat further includes a cover that is arranged inside the rod material in the width direction and covers the reinforcing part from the inside in the width direction and from the side of the seating surface. . The cover has an outer surface that is continuous with a surface on the seating surface side of the rod material,
In a cross-sectional view perpendicular to the direction in which the rods extend, the outer surface of the cover is inclined so as to be located on the opposite side from the seating surface as it goes inward in the width direction. The chair according to item 2 or 6 . The engagement groove of the rod material is provided in a range that does not overlap with the supported part when viewed from the width direction,
The seat is provided with a second engagement groove that is provided on the inner side in the width direction with respect to the supported part in a range that includes a range that overlaps with the supported part when viewed from the width direction, and that is continuous with the engagement groove of the rod material. The chair according to any one of claims 1 to 7 , further comprising a groove forming member having a matching groove and attached to the rod material.

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