Covering material attachment fixture

Abstract

To provide a skin material fitting tool that can improve workability at the time of assembly.SOLUTION: A skin material fitting tool 1 is fitted to a skin material 8 and engaged with a clip 9 installed in a groove 71 of a cushion material 7, and comprises: a first side wall part 20A and a second side wall part 20B opposed to each other while extending in an insertion direction with respect to the clip 9, and forming a skin material arrangement space in which the skin material 8 is arranged, between them; and a clip insertion part 30 connected to respective tip parts of the first side wall part 20A and the second side wall part 20B in the insertion direction, and connecting the first side wall part 20A and the second side wall part 20B.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a cover material attachment tool. [Background technology]

[0002] Conventionally, seats and chairs have often been equipped with cushioning materials or flexible pads on the seat surface, backrest, and other areas that come into contact with the human body, and the surfaces of these are covered with a covering material, and various structures have been used to secure such covering materials. For example, Patent Document 1 discloses a cover material attachment tool that is attached to a cover material and latches onto a clip installed in a groove in a cushion material. This cover material attachment tool includes a nonwoven fabric sewn to an end of the cover material and an anchor-shaped clip insertion part that is attached to the nonwoven fabric. When assembling this cover material attachment tool to the clip, a worker or a jig applies force to push the cover material attachment tool into the groove in the cushion material, and inserts the clip insertion part into the clip in the groove. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] US Patent Application Publication No. 2002 / 0101109 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the upholstery material attachment tool of Patent Document 1, the nonwoven fabric is easily bent, making it difficult to stabilize the posture and position of the clip insertion part when pushing the upholstery material attachment tool into the groove of the cushion material. This makes it difficult to smoothly insert the clip insertion part into the clip, making it difficult to improve workability.

[0005] An object of the present invention is to provide a skin material attaching tool that can improve workability during assembly. [Means for solving the problem]

[0006] The present invention provides a cover material attachment device that is attached to a cover material and engages with a clip installed in a groove of a cushion material, and includes a first side wall portion and a second side wall portion that face each other while extending in an insertion direction relative to the clip and that form between them a cover material placement space in which the cover material is placed, and a clip insertion portion that is connected to each of the leading ends of the first side wall portion and the second side wall portion in the insertion direction and that connects the first side wall portion and the second side wall portion.

[0007] In the present invention, the first and second side walls are attached to the cover material by sewing or the like, eliminating the need for nonwoven fabric as in the past. Furthermore, by sandwiching the cover material between the first and second side walls in a direction intersecting the insertion direction, the first and second side walls are less likely to bend in response to a force in the insertion direction. Therefore, when the cover material attachment tool is pushed into the groove of the cushion material, the posture and position of the clip insertion portion can be easily stabilized, allowing the clip insertion portion to be smoothly inserted into the clip. This improves the ease of assembly.

[0008] Preferably, the present invention further comprises a first inclined wall portion extending from a rear end portion in the insertion direction of the first side wall portion and inclined with respect to the insertion direction so as to move away from the second side wall portion in the direction opposite to the insertion direction, and a second inclined wall portion extending from a rear end portion in the insertion direction of the second side wall portion and inclined with respect to the insertion direction so as to move away from the first side wall portion in the direction opposite to the insertion direction. In this configuration, the first inclined wall portion and the second inclined wall portion each have a surface (hereinafter, "pressing surface") facing in the opposite direction to the insertion direction, making it easy to apply force in the insertion direction to the pressing surfaces of the first inclined wall portion and the second inclined wall portion. Furthermore, the pressing surfaces of the first inclined wall portion and the second inclined wall portion have a shape that makes it relatively difficult to feel uneven, even when they are located near the opening of the groove, reducing the foreign body sensation of the upholstery material attaching tool.

[0009] In the present invention, it is preferable that the first inclined wall portion is inclined while curving at a connecting portion with the first side wall portion, and the second inclined wall portion is inclined while curving at a connecting portion with the second side wall portion. In this configuration, the foreign body sensation of the cover material attachment tool can be more suitably reduced.

[0010] The upholstery material attachment tool of the present invention further comprises a first hook portion extending from the first side wall portion toward the second side wall portion and facing the upholstery material arrangement space, and a second hook portion extending from the second side wall portion toward the first side wall portion and facing the first hook portion, and it is preferable that the first hook portion and the second hook portion have claw portions that engage with each other. In this configuration, the engagement between the first hook portion and the second hook portion maintains the distance between the first side wall portion and the second side wall portion, which makes it easier to maintain the shape of the upholstery material attachment tool when sewing the upholstery material and improves the strength of the upholstery material attachment tool 1 when in use. In addition, by placing the upholstery material between the first side wall portion and the second side wall portion and butting it against the first hook portion, the upholstery material can be positioned in the insertion direction.

[0011] In the present invention, it is preferable that the clip insertion portion, the first side wall portion and the second side wall portion have one or more slits formed in the first side wall portion and the second side wall portion, the slits being cut into the first side wall portion and the second side wall portion in a direction opposite to the insertion direction from the clip insertion portion. In this configuration, the slits provide flexibility to the cover material attachment tool. For example, each of the portions of the clip insertion section divided by the slits can be engaged with a plurality of clips arranged along the curve.

[0012] In the present invention, it is preferable that the clip insertion portion comprises a first engagement portion connected to the tip portion of the first side wall portion, a second engagement portion connected to the tip portion of the second side wall portion, and a bottom wall portion whose both ends are connected to the first engagement portion and the second engagement portion and whose at least a portion is curved so as to protrude in the insertion direction. In this configuration, the bottom wall portion is easily elastically deformed, which improves the ease of inserting the clip insertion portion into the clip.

[0013] In the present invention, it is preferable that the bottom wall portion includes a thin portion having a thickness smaller than each of the first side wall portion and the second side wall portion. In this configuration, the upholstery material attachment tool can be manufactured by molding a sheet body that will become the upholstery material attachment tool and folding the thin-walled portion. This allows for the optimal use of extrusion molding to form the sheet body, and simplifies the manufacturing process of the upholstery material attachment tool. [Effects of the Invention]

[0014] According to the present invention, it is possible to provide a skin material attaching tool that can improve workability during assembly. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a schematic diagram showing an example of use of a skin material attaching tool according to a first embodiment of the present invention. [Figure 2] 3A and 3B are perspective views showing the upholstery material attachment tool, the clip, and the upholstery material of the first embodiment. [Figure 3] FIG. 3 is a side view showing the upholstery material attachment tool of the first embodiment. [Figure 4] 5A to 5C are diagrams illustrating a manufacturing process of the upholstery material attachment tool of the first embodiment. [Figure 5] 5A to 5C are diagrams illustrating a method of using the upholstery material attachment tool of the first embodiment. [Figure 6] FIG. 10 is a perspective view showing a skin material attaching tool according to a second embodiment of the present invention. [Figure 7] FIG. 10 is a front view showing the upholstery material attaching tool of the second embodiment. [Figure 8] 6A to 6C are diagrams illustrating a manufacturing process of the upholstery material attachment tool of the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0016] [First embodiment] A first embodiment of the present invention will be described with reference to the drawings. 1 and 2, a cover material attaching device 1 according to this embodiment attaches a cover material 8 to a cushion material 7 that constitutes a seat or the like. This cover material attaching device 1 is attached to one end of the cover material 8, and attaches the cover material 8 to the cushion material 7 by engaging with a clip 9 that is installed in a groove 71 of the cushion material 7. In the following description, the insertion direction of the upholstery material fastener 1 into the clip 9 (the height direction of the upholstery material fastener 1) is defined as the Z direction, the width direction of the upholstery material fastener 1 is defined as the Y direction, and the length direction of the upholstery material fastener 1 is defined as the X direction. The X, Y, and Z directions are perpendicular to each other.

[0017] The cushion material 7 is a synthetic resin urethane foam material such as polyurethane foam, etc. The cushion material 7 is shaped to fit any part of the seat (for example, the seat surface or the back), and has grooves 71 formed therein that extend in any direction. The cover material 8 is a synthetic resin fabric sheet or the like that covers the surface of the cushion material 7.

[0018] The clip 9 is a molded product made of a thermoplastic resin such as polypropylene. The clip 9 has a flat base 91 embedded in the bottom of the groove 71 of the cushion material 7, a pair of legs 92 standing on the base 91, and claws 93 extending from the tip of each of the pair of legs 92 toward the other leg 92. The gap between the pair of claws 93 is set narrower than the width in the Y direction of a clip insertion portion 30, which will be described later.

[0019] The structure of the upholstery material attaching tool 1 will be described below with reference to FIG. The upholstery material fastener 1 is a molded product made of thermoplastic resin such as polypropylene. The upholstery material fastener 1 includes a first side wall portion 20A and a second side wall portion 20B that extend in the Z direction and face each other, a clip insertion portion 30 that is connected to a leading end portion 21A of the first side wall portion 20A and a leading end portion 21B of the second side wall portion 20B, respectively, and that connects the first side wall portion 20A and the second side wall portion 20B, a first hook portion 40A that extends from the first side wall portion 20A toward the second side wall portion 20B, a second hook portion 40B that extends from the second side wall portion 20B toward the first side wall portion 20A, a first inclined wall portion 50A that extends from a rear end portion 22A of the first side wall portion 20A, and a second inclined wall portion 50B that extends from a rear end portion 22B of the second side wall portion 20B. The skin material attachment tool 1 has a structure that is almost plane-symmetrical with respect to the XZ plane that passes through the center in the Y direction.

[0020] The first side wall 20A and the second side wall 20B each have a plate shape disposed along the XZ plane and are disposed opposite each other with a gap in the Y direction between them. The first side wall 20A has a leading end 21A that is one end in the Z direction and a trailing end 22A that is the other end in the Z direction, and the second side wall 20B has a leading end 21B that is one end in the Z direction and a trailing end 22B that is the other end in the Z direction. A skin arrangement space S1 in which a skin 8 is disposed is formed between the first side wall 20A and the second side wall 20B, on the -Z direction side of a first hook portion 40A (described later).

[0021] The clip insertion portion 30 has a curved or bent plate shape with both ends connected to the first side wall portion 20A and the second side wall portion 20B. The clip insertion portion 30 includes a first engagement portion 32A that extends outward in the Y direction (the opposite side from the second side wall portion 20B) from the tip portion 21A of the first side wall portion 20A and forms a first engagement surface 31A, a second engagement portion 32B that extends outward in the Y direction (the opposite side from the first side wall portion 20A) from the tip portion 21B of the second side wall portion 20B and forms a second engagement surface 31B, and a bottom wall portion 33 whose both ends are connected to the first engagement portion 32A and the second engagement portion 32B. The first engagement surface 31A and the second engagement surface 31B each face in the -Z direction.

[0022] The bottom wall 33 has a curved central portion in the Y direction so as to protrude in the Z direction. Specifically, the bottom wall 33 has a first guide wall 331A extending from the tip of the first engagement portion 32A and inclined inward in the Y direction with respect to the Z direction, a second guide wall 331B extending from the tip of the second engagement portion 32B and inclined inward in the Y direction with respect to the Z direction, and a curved portion 332 connecting the first guide wall 331A and the second guide wall 331B. The bottom wall 33 forms a gap space S2 inside the clip insertion portion 30.

[0023] In this embodiment, the thickness of the bottom wall 33 gradually decreases from each of the first guide wall 331A and the second guide wall 331B to the curved portion 332, and the thickness of the curved portion 332 is thinner than the thicknesses of the first side wall 20A and the second side wall 20B. Therefore, the curved portion 332 corresponds to the thin portion of the present invention. For example, the thickness of the curved portion 332 is approximately half the thickness (e.g., 0.5 to 2.0 mm) of each of the first side wall 20A and the second side wall 20B.

[0024] The first hook portion 40A extends from any position on the first side wall portion 20A in the Z direction toward the second side wall portion 20B. The position of the first hook portion 40A in the Z direction is preferably a position where the desired upholstery material arrangement space S1 can be formed. The tip of the first hook portion 40A is provided with a claw portion 41A that protrudes in the Z direction. The second hook portion 40B is positioned on the +Z direction side of the first hook portion 40A and faces the first hook portion 40A. A claw portion 41B that protrudes in the -Z direction is provided at the tip of the second hook portion 40B. The claw portion 41A of the first hook portion 40A and the claw portion 41B of the second hook portion 40B engage with each other in the Y direction.

[0025] The first inclined wall portion 50A has a plate shape that continues from the rear end portion 22A of the first side wall portion 20A and is inclined with respect to the Z direction so that it moves away from the second side wall portion 20B in the -Z direction (the direction opposite to the insertion direction) from the rear end portion 22A. The first inclined wall portion 50A is inclined and curved at the connection portion with the first side wall portion 20A, forming an R-shape 51A that convex inward in the Y direction. The first inclined wall portion 50A also forms a pressing surface portion 52A that faces in the -Z direction. The second inclined wall portion 50B has a plate shape continuing from the rear end portion 22B of the second side wall portion 20B, and is inclined with respect to the Z direction so as to extend from the rear end portion 22B and move away from the first side wall portion 20A in the -Z direction. The second inclined wall portion 50B is inclined and curved at the connection portion with the second side wall portion 20B, forming an R-shape 51B that is convex inward in the Y direction. The second inclined wall portion 50B also forms a pressing surface portion 52B facing in the -Z direction.

[0026] An example of a method for manufacturing the upholstery material attachment tool 1 according to this embodiment will be described. First, as shown in Fig. 4, a sheet member 10 corresponding to the upholstery material attachment tool 1 is manufactured by extrusion molding, with the first side wall portion 20A and the second side wall portion 20B being opened from each other by a predetermined angle θ. Here, the predetermined angle θ is, for example, 180°. Next, the thin portion 332P is bent around the imaginary line C in Figure 4, so that the first side wall portion 20A and the second side wall portion 20B face each other. Here, the thin portion 332P functions as a hinge, and is bent to form the curved portion 332. Then, the claw portion 41A of the first hook portion 40A and the claw portion 41B of the second hook portion 40B are engaged with each other. In this way, the upholstery material attaching tool 1 is manufactured. Thereafter, the end 81 of the skin 8 is inserted between the first side wall 20A and the second side wall 20B in the Z direction and brought into contact with the first hook 40A, thereby placing the skin 8 in the skin placement space S1 (see FIG. 2).Then, the first side wall 20A and the second side wall 20B are sewn together in the X direction at a predetermined position in the Z direction (for example, position P in FIG. 1), thereby attaching the skin 8 to the first side wall 20A and the second side wall 20B.

[0027] Next, an example of how to use the upholstery material attaching tool 1 according to this embodiment will be described. As described above, the upholstery material attaching tool 1 with the upholstery material 8 attached is prepared, and as shown in Fig. 5, the upholstery material attaching tool 1 is pressed in the Z direction into the groove 71 of the cushion material 7. At this time, an operating object T, which may be a jig or the operator's finger, applies pressure in the Z direction to the pressing surfaces 52A and 52B of the upholstery material attaching tool 1 via the upholstery material 8. The force applied to the pressing surfaces 52A and 52B is transmitted to the clip insertion part 30 via the first side wall part 20A and the second side wall part 20B. When the upholstery material attaching device 1 is pushed into the groove 71 and the first guide wall portion 331A and the second guide wall portion 331B abut against the pair of claw portions 93 of the clip 9, the clip inserting portion 30 is inserted between the pair of legs 92 while bending the pair of legs 92 outward in the Y direction. At this time, the clip inserting portion 30 receives a load acting inward in the Y direction from the pair of legs 92, bending inward in the Y direction, facilitating insertion between the pair of legs 92. When the first guide wall portion 331A and the second guide wall portion 331B pass between the pair of legs 92, the first engaging surface 31A and the second engaging surface 31B engage with the pair of claw portions 93, preventing the upholstery material attaching device 1 from slipping out of the clip 9. This allows the upholstery material 8 to be attached to the cushion material 7.

[0028] (Effects of the first embodiment) In the upholstery material attaching tool 1 described above, the first side wall 20A and the second side wall 20B are attached to the upholstery material 8 by sewing or the like, eliminating the need to use nonwoven fabric as in the past. Furthermore, by sandwiching the upholstery material 8 in the Y direction (a direction intersecting the insertion direction), the first side wall 20A and the second side wall 20B are less likely to bend due to a force in the Z direction (insertion direction). Therefore, when the upholstery material attaching tool 1 is pushed into the groove 71 of the cushion material 7, the posture and position of the clip insertion portion 30 can be easily stabilized, and the clip insertion portion 30 can be smoothly inserted into the clip 9. This improves the ease of assembly. Furthermore, in this embodiment, since the posture and position of the clip insertion portion 30 can be easily stabilized, automatic assembly using an assembly device can also be easily performed.

[0029] In this embodiment, the first inclined wall portion 50A and the second inclined wall portion 50B have pressing surface portions 52A and 52B, respectively, and it is easy to apply force in the insertion direction via the pressing surface portions 52A and 52B of the first side wall portion 20A and the second side wall portion 20B. Furthermore, the pressing surfaces 52A, 52B of the first inclined wall 50A and the second inclined wall 50B are shaped so that they are relatively hard to feel uneven, even when they are disposed near the opening of the groove 71. This reduces the feeling of a foreign body when using the upholstery material attaching tool 1. Furthermore, the first inclined wall portion 50A and the second inclined wall portion 50B are deflected in response to the load received by the pressing surface portions 52A, 52B, so that a user of the seat or the like is unlikely to feel a strong reaction force.

[0030] In this embodiment, the first inclined wall portion 50A is inclined and curved at the connection portion with the first side wall portion 20A, and the second inclined wall portion 50B is inclined and curved at the connection portion with the second side wall portion 20B, thereby more effectively reducing the foreign body sensation of the upholstery material attachment device 1.

[0031] The upholstery material attaching tool 1 of this embodiment has a first hook portion 40A and a second hook portion 40B that engage with each other, thereby maintaining a distance between the first side wall portion 20A and the second side wall portion 20B. This makes it easier to hold the upholstery material attaching tool 1 when sewing the upholstery material 8 and improves the strength of the upholstery material attaching tool 1 when in use. Furthermore, by placing the upholstery material 8 between the first side wall portion 20A and the second side wall portion 20B and butting it against the first hook portion 40A, the upholstery material 8 can be positioned in the insertion direction.

[0032] In this embodiment, the bottom wall 33 of the clip insertion portion 30 has both ends connected to the first engagement portion 32A and the second engagement portion 32B, and is partially curved so as to protrude in the Z direction, so that it is easily elastically deformed by an inward load in the Y direction. This improves the insertability of the clip insertion portion 30 into the clip 9.

[0033] In this embodiment, the sheet body 10 that will become the upholstery material fastener 1 is molded, and the thin-walled portion 332P is folded into a hinge shape, thereby manufacturing the upholstery material fastener 1. This makes it possible to suitably use extrusion molding to mold the sheet body 10, and makes the manufacturing process of the upholstery material fastener 1 easier. Furthermore, by constructing the upholstery material attachment tool 1 from an elastic material such as resin, the gap between the first side wall portion 20A and the second side wall portion 20B (i.e., the upholstery material placement space S1) can be adjusted to match the thickness of the upholstery material 8, and as a result, it can be attached to upholstery materials 8 of various thicknesses.

[0034] Second Embodiment Next, a skin material attaching tool 1A according to a second embodiment of the present invention will be described with reference to Figures 6 to 8. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and their description will be omitted or simplified.

[0035] 6 and 7, a plurality of slits 12 are formed in the upholstery material attachment tool 1A. The slits 12 are shaped by cutting into the first side wall portion 20A and the second side wall portion 20B from the clip insertion portion 30 toward the +Z direction. The plurality of slits 12 are arranged at predetermined intervals in the X direction. There are no particular limitations on the width dimension in the X direction or the cut length in the Z direction of the slit 12. However, as shown in Figure 7, it is preferable that the slit 12 does not reach the sewing position P of the skin material 8.

[0036] In this embodiment, most of the first side wall portion 20A and the second side wall portion 20B, the clip insertion portion 30, the first hook portion 40A, and the second hook portion 40B are divided by a plurality of slits 12. In other words, this embodiment can be said to have a plurality of upholstery material fasteners 1a that share a portion of the first side wall portion 20A and the second side wall portion 20B, and the first inclined wall portion 50A and the second inclined wall portion 50B, and are integrally formed. Note that, in Figures 6 to 8, for simplicity of illustration, reference numerals are used to represent the components corresponding to one upholstery material fastener 1a.

[0037] An example of a method for manufacturing the upholstery material attaching tool 1A according to this embodiment will be described. First, a sheet body corresponding to the upholstery material attachment tool 1A in a state in which the first side wall portion 20A and the second side wall portion 20B are opened from each other by a predetermined angle θ (for example, 180°) and in which the slit 12 has not been formed is manufactured by extrusion molding. Next, as shown in FIG. 8, the extrusion-molded sheet member 10A is intermittently cut to form a plurality of holes 12A corresponding to the plurality of slits 12. Thereafter, similarly to the first embodiment, the thin portion 332P is bent to place the first side wall portion 20A and the second side wall portion 20B opposite each other. Here, the thin portion 332P functions as a hinge, and forms the curved portion 332 by being bent. Then, the claw portion 41A of the first hook portion 40A and the claw portion 41B of the second hook portion 40B are engaged with each other, thereby completing the upholstery material attaching tool 1A.

[0038] In this embodiment, flexibility is imparted to the upholstery material attaching tool 1A by the slits 12. For example, each portion of the clip inserting section 30 divided by the slits 12 (each clip inserting section 30 of the multiple upholstery material attaching tools 1a) can be engaged with each of the multiple clips 9 arranged along the curve.

[0039] [Modification] In the above embodiments, the upholstery material attachment devices 1, 1A are described as being manufactured using a manufacturing method that includes extrusion molding, but the upholstery material attachment devices of the present invention may be manufactured using other methods. Also, the upholstery material attachment devices 1, 1A may not have the curved portion 332 as the thin-walled portion 332P, or the first hook portion 40A and the second hook portion 40B.

[0040] In each of the above embodiments, the clip insertion portion 30 has the bottom wall portion 33 including the curved portion 332, but the entire bottom wall portion 33 may be curved. Also, the clip insertion portion 30 may not have the clearance space S2 inside and may be formed in an anchor shape as a whole. In addition, in each of the above-described embodiments, the first inclined wall portion 50A is inclined and curved at the connection portion with the first side wall portion 20A, but the present invention is not limited to this, and it is sufficient that the first inclined wall portion 50A is at least inclined. The same applies to the second inclined wall portion 50B.

[0041] In the above-described embodiments, the first inclined wall portion 50A and the second inclined wall portion 50B extend from the rear end portions 22A, 22B of the first side wall portion 20A and the second side wall portion 20B, respectively. However, the present invention is not limited to this. For example, the rear end portions 22A, 22B of the first side wall portion 20A and the second side wall portion 20B may be used as the end portions of the upholstery material attaching fixture 1, 1A, or any cushioning material may be provided at the rear end portions 22A, 22B. [Explanation of symbols]

[0042] 1, 1A, 1a...cover material attachment tool, 10, 10A...sheet body, 12...slit, 12A...hole, 20A...first side wall portion, 21A...front end portion, 22A...rear end portion, 20B...second side wall portion, 21B...front end portion, 22B...rear end portion, 30...clip insertion portion, 31A...first engagement surface, 31B...second engagement surface, 32A...first engagement portion, 32B...second engagement portion, 33...bottom wall portion, 331A...first guide wall portion, 331B...second guide wall portion, 332...bay Curved portion, 332P...thin portion, 40A...first hook portion, 41A...claw portion, 40B...second hook portion, 41B...claw portion, 50A...first inclined wall portion, 50B...second inclined wall portion, 51A, 51B...R-shape, 52A, 52B...pressure surface portion, 7...cushion material, 71...groove, 8...cover material, 81...end portion, 9...clip, 91...base portion, 92...leg portion, 93...claw portion, P...sewing position, S1...cover material arrangement space, S2...gap space, T...operating body.

Claims

1. A cover material attachment (1) is attached to a cover material (8) and engages with a clip (9) installed in a groove (71) of a cushion material (7), a first side wall portion (20A) and a second side wall portion (20B) extending in an insertion direction of the clip (9) and facing each other, and forming a skin material arrangement space (S1) therebetween in which the skin material (8) is arranged; a clip insertion portion (30) connected to each of the leading ends (21A, 21B) of the first side wall portion (20A) and the second side wall portion (20B) in the insertion direction, and connecting the first side wall portion (20A) and the second side wall portion (20B); a first inclined wall portion (50A) extending from a rear end portion (22A) of the first side wall portion (20A) in the insertion direction and inclined with respect to the insertion direction so as to become more distant from the second side wall portion (20B) in a direction opposite to the insertion direction; a second inclined wall portion (50B) extending from a rear end portion (22B) in the insertion direction of the second side wall portion (20B) and inclined with respect to the insertion direction so as to move away from the first side wall portion (20A) in the direction opposite to the insertion direction.

2. The first inclined wall portion (50A) is inclined and curved at a connection portion with the first side wall portion (20A), 2. The upholstery material attaching tool according to claim 1, wherein the second inclined wall portion (50B) is inclined and curved at a connection portion with the second side wall portion (20B).

3. A skin material attachment device (1) that is attached to a skin material (8) and engages with a clip (9) installed in a groove (71) of a cushion material (7), a first side wall portion (20A) and a second side wall portion (20B) extending in an insertion direction of the clip (9) and facing each other, and forming a skin material arrangement space (S1) therebetween in which the skin material (8) is arranged; a clip insertion portion (30) connected to each of the leading ends (21A, 21B) of the first side wall portion (20A) and the second side wall portion (20B) in the insertion direction, and connecting the first side wall portion (20A) and the second side wall portion (20B); a first hook portion (40A) extending from the first side wall portion (20A) toward the second side wall portion (20B) and facing the skin material arrangement space (S1); a second hook portion (40B) extending from the second side wall portion (20B) toward the first side wall portion (20A) and facing the first hook portion (40A), The first hook portion (40A) and the second hook portion (40B) have claw portions (41A, 41B) that engage with each other.

4. 4. The upholstery material attaching tool according to claim 1, wherein one or more slits (12) are formed in the clip insertion portion (30), the first side wall portion (20A), and the second side wall portion (20B), the slits being shaped like cuts made in the first side wall portion (20A) and the second side wall portion (20B) from the clip insertion portion (30) along a direction opposite to the insertion direction.

5. The clip insert (30) a first engaging portion (32A) connected to the tip portion (21A) of the first side wall portion (20A); a second engaging portion (32B) connected to the tip portion (21B) of the second side wall portion (20B); a bottom wall portion (33) whose opposite ends are connected to the first engaging portion (32A) and the second engaging portion (32B), and whose at least a portion is curved so as to protrude in the insertion direction.

6. A skin material attachment device (1) that is attached to a skin material (8) and engages with a clip (9) installed in a groove (71) of a cushion material (7), a first side wall portion (20A) and a second side wall portion (20B) extending in an insertion direction of the clip (9) and facing each other, and forming a skin material arrangement space (S1) therebetween in which the skin material (8) is arranged; a clip insertion portion (30) connected to each of the leading ends (21A, 21B) of the first side wall portion (20A) and the second side wall portion (20B) in the insertion direction, and connecting the first side wall portion (20A) and the second side wall portion (20B), The clip insert (30) a first engaging portion (32A) connected to the tip portion (21A) of the first side wall portion (20A); a second engaging portion (32B) connected to the tip portion (21B) of the second side wall portion (20B); a bottom wall portion (33) whose both ends are connected to the first engaging portion (32A) and the second engaging portion (32B) and whose at least a portion is curved so as to protrude in the insertion direction, The bottom wall portion (33) includes a thin portion (332P) having a thickness smaller than each of the first side wall portion (20A) and the second side wall portion (20B).

Images