Covering material attachment fixture

Abstract

To provide a skin material attachment tool for surely attaching a skin material with the use of pressing means.SOLUTION: A skin material attachment tool 5 includes: an attachment part 51 to be attached to a skin material; and an inserted part 52 to be inserted by an insertion part 42 of a lock member 4 attached to a groove 21 of a cushion material 2. The inserted part 52 includes: a connection part 53 to be connected to the attachment part 51; a first leg part 521 and a second leg part 522 extending from the connection part 53 and opposing each other by sandwiching a space; a main engagement part 54 projected from the first leg part 521 toward the second leg part 522 so as to be engaged with the insertion part 42; and a temporary engagement part 55 projected from the first leg part 521 toward the second leg part 522 at a position closer to a distal end of the first leg part 521 than the main engagement part 54 so as to be engaged with the insertion part 42.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a cover material attaching tool for attaching a cover material to a cushion material. [Background technology]

[0002] Conventionally, vehicle seats and chairs have often been fitted with cushioning material on the seat surface, backrest, and other areas that come into contact with the human body, and the surface of these cushioning materials is covered with a covering material. Covering material attachment devices are known as a means for attaching the covering material to the cushioning material. For example, the upholstery attachment device in Patent Document 1 is attached to one of the grooves of the upholstery or cushioning material, and is locked to a locking member attached to the other groove of the upholstery or cushioning material. This upholstery attachment device has a pair of legs, and the insertion portion of the locking member is inserted between the pair of legs to lock the upholstery attachment device to the locking member. As a result, the upholstery material is attached to the cushioning material. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2008 / 050393 Summary of the Invention [Problem to be solved by the invention]

[0004] Generally, at the site where the covering material is attached, there is a demand for the use of pressing means such as an automatic machine to reduce the burden on the worker. However, with the technology disclosed in Patent Document 1, when inserting the upholstery material attachment tool (or locking member) attached to the upholstery material into the groove of the cushion material, the upholstery material attachment tool (or locking member) is prone to tilting due to the influence of the shape of the cushion material and the tension applied to the upholstery material. When using a pressing means such as an automatic machine, if the upholstery material attachment tool (or locking member) attached to the upholstery material is pressed while in a tilted position, the insertion portion of the locking member may not be inserted between the pair of legs of the upholstery material attachment tool, and the upholstery material may not be attached successfully.

[0005] An object of the present invention is to provide a skin material attaching tool that can reliably attach a skin material using a pressing means. [Means for solving the problem]

[0006] (First aspect) A cover material attachment device according to a first aspect of the present invention is a cover material attachment device for attaching a cover material to a cushion material, and comprises: an attachment portion attached to one of the grooves of the cover material or the cushion material; and an insertion portion inserted by an insertion portion of a locking member attached to the other of the grooves of the cover material or the cushion material, the insertion portion comprising: a first leg portion and a second leg portion extending in one direction and facing each other; a connecting portion connecting base ends of the first leg portion and the second leg portion and connected to the attachment portion; a main engagement portion protruding from the first leg toward the second leg and engageable with the insertion portion; and a provisional engagement portion protruding from the first leg toward the second leg at a position closer to the tip of the first leg than the main engagement portion and engageable with the insertion portion. In this configuration, the temporary engagement portion of the upholstery material attaching tool engages with the locking member, temporarily maintaining the insertion portion of the locking member shallowly inserted between the first leg and the second leg. Then, by applying pressure to the upholstery material attaching tool or the locking member using a pressing means such as an automatic machine, the insertion portion is inserted deeper between the first leg and the second leg, and the full engagement portion of the upholstery material attaching tool can be engaged with the locking member. According to the upholstery material attaching tool of the first aspect of the present invention, the pressing means can be used to reliably attach the upholstery material.

[0007] (Second aspect) In the upholstery material attachment tool according to the first aspect of the present invention, the main engagement portion preferably has a main engagement guide surface that is inclined with respect to the extension direction of the first leg so as to face the tip side of the first leg, and a main engagement surface that faces the base end side of the first leg and is capable of engaging with the insertion portion, and the main engagement surface preferably forms a storage space between the main engagement surface and the connecting portion in which the insertion portion is disposed. In this configuration, the main engagement guide surface can guide the provisionally engaged insertion portion into the accommodation space, and the main engagement surface can abut against the insertion portion accommodated in the accommodation space, thereby enabling main engagement to be performed in a suitable manner.

[0008] (Third aspect) In the upholstery material attachment device according to the first or second aspect of the present invention, the temporary engagement portion preferably has a temporary engagement guide surface that is inclined with respect to the extension direction of the first leg so as to face the tip side of the first leg, and a temporary engagement surface that faces the base end side of the first leg and is capable of engaging with the insertion portion, and the temporary engagement surface preferably forms a space between itself and the main engagement portion into which a part of the insertion portion can fit. In this configuration, the provisional engagement guide surface can guide the insertion portion toward the gap between the first leg and the second leg, and the provisional engagement surface can abut against the insertion portion inserted into the gap between the first leg and the second leg, thereby enabling optimal provisional engagement.

[0009] (Fourth aspect) In the upholstery material attachment tool according to any one of the first to third aspects of the present invention, it is preferable that the tip of the first leg bends toward the opposite side to the second leg, and that the provisional engagement guide surface is formed at the tip of the first leg. According to this configuration, the provisional engagement guide surface for guiding the insertion portion can be secured widely in the width direction of the groove.

[0010] (Fifth aspect) In the upholstery material attachment tool according to any one of the first to fourth aspects of the present invention, it is preferable that the attachment portion is attached to the upholstery material, and the connecting portion has a flat surface facing in a direction opposite to the direction in which the first leg portion and the second leg portion extend from the connecting portion. In such a configuration, when the cover material attachment tool is positioned so that the flat surface faces the opening side of the groove in the cushion material, a pressing means such as an automatic machine can suitably apply pressure to the flat surface in the depth direction of the groove in the cushion material.

[0011] (Sixth aspect) In the upholstery material attachment tool according to the fifth aspect of the present invention, it is preferable that one of the first leg portion or the second leg portion and the attachment portion are both connected to an end portion of the connecting portion that is located on one side in the width direction of the groove. With this configuration, it is possible to ensure a larger flat surface of the connecting portion.

[0012] (Seventh aspect) In the upholstery material attachment tool according to any one of the first to sixth aspects of the present invention, it is preferable that the second leg portion has an inner surface facing the first leg portion and arranged along the extension direction of the second leg portion, and an inclined surface facing the first leg portion and the tip end side of the second leg portion and formed continuously with the inner surface. In this configuration, unlike the first leg, the second leg does not have a protruding shape such as a full engagement portion or a provisional engagement portion, which reduces unnecessary interference from the second leg with the locking member, particularly when the upholstery material attachment tool is tilted from its mating position with the locking member, ensuring reliable provisional engagement. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a cross-sectional view showing a state in which a cover material attachment tool according to an embodiment of the present invention is installed on a cushion material. [Figure 2] FIG. 3 is an enlarged view showing a part of FIG. 2. [Figure 3]10A and 10B are diagrams illustrating a method for attaching a cover material using the cover material attaching tool of the embodiment, showing how an inserting portion is inserted into a groove in a cushion material. [Figure 4] 10A and 10B are diagrams illustrating a method for attaching a skin material using the skin material attaching tool of the embodiment, showing a state of temporary engagement. [Figure 5] 10A and 10B are diagrams illustrating a method for attaching a skin material using the skin material attaching tool of the embodiment, showing a state of full engagement. [Figure 6] FIG. 10 is a cross-sectional view of a cushion material showing a cover material attachment tool according to a modified example of the embodiment. [Figure 7] FIG. 10 is a cross-sectional view of a cushion material showing a cover material attachment tool according to another modified example of the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0014] An embodiment of the present invention will be described with reference to the drawings. As shown in Figure 1, a cover material attaching tool 5 according to this embodiment constitutes a cover material attaching structure 1 for attaching a cover material 3 to a cushion material 2 that constitutes a vehicle seat or the like. That is, the cover material attaching structure 1 is composed of a locking member 4 that is attached to a groove 21 of the cushion material 2, and a cover material attaching tool 5 that is attached to the cover material 3. By locking the cover material attaching tool 5 to the locking member 4, the cover material 3 can be attached to the cushion material 2.

[0015] The cushion material 2 is a synthetic resin urethane foam material such as polyurethane foam molded into the shape of a seat. A groove 21 is formed in the cushion material 2, in which the upholstery material mounting structure 1 is disposed. The groove 21 has a first groove wall surface 211 and a second groove wall surface 212 that face each other, and extends along any direction on the surface of the cushion material 2 while forming an opening 21A on one side of the cushion material 2 in the up-down direction.

[0016] The covering material 3 is a sheet that covers the surface of the cushion material 2, and is, for example, a synthetic resin fabric sheet. Edge portions 31 of the covering material 3 are attached to the covering material attaching tool 5 by sewing or the like. In FIG. 1, the edge portions 31 of two covering materials 3 are attached to the covering material attaching tool 5.

[0017] In the following description of the configuration of the upholstery material mounting structure 1, three axial directions, X, Y, and Z, are used based on the state in which the upholstery material mounting fixture 5 is locked to the locking member 4 (fully engaged state) (see FIGS. 1 and 5). For example, the length direction of the upholstery material mounting structure 1 is defined as the X direction, the left-right direction of the upholstery material mounting structure 1 as the Y direction, and the up-down direction of the upholstery material mounting structure 1 as the Z direction. Note that when the upholstery material 3 is installed on the cushion material 2 by the upholstery material mounting structure 1 (see FIG. 1), the X direction corresponds to the length direction of the groove 21 in the cushion material 2, the Y direction corresponds to the width direction of the groove 21, and the Z direction corresponds to the depth direction of the groove 21. For convenience of explanation, the direction toward one side (upward) in the Z direction is defined as the +Z direction, and the direction toward the other side (downward) in the Z direction is defined as the -Z direction, and the groove 21 is assumed to open in the cushion material 2 in the +Z direction.

[0018] The locking member 4 is a molded product made of a thermoplastic resin such as polypropylene. The locking member 4 includes a base 41 embedded in the bottom of the groove 21 of the cushion material 2, and an insertion portion 42 standing on the base 41. The base 41 has, for example, a plate shape. The base 41 is attached to the groove 21 of the cushion material 2 by being embedded in the bottom of the groove 21 of the cushion material 2 at the same time as the cushion material 2 is formed.

[0019] The insertion portion 42 includes a wall portion 421 that extends in the +Z direction from the base portion 41 and is disposed along the XZ plane, and a swelling portion 422 that is provided at the tip of the wall portion 421 on the +Z side. On each side of the wall portion 421, a recessed portion 423 is formed in the region adjacent to the expanded portion 422, extending in the X direction. The swelling portion 422 has an upward anchor shape that protrudes from the wall portion 421 on both sides in the Y direction. Specifically, the swelling portion 422 has a pair of engaged surfaces 424 facing in the -Z direction, a pair of inclined surfaces 425 facing in the +Z direction, and a pair of end surfaces 426 connecting the engaged surfaces 424 and the inclined surfaces 425. The pair of inclined surfaces 425 are inclined with respect to the Z direction so as to face outward in the Y direction and toward the +Z side.

[0020] The skin material fastener 5 is a molded product made of a thermoplastic resin such as polypropylene. The skin material fastener 5 includes an attachment portion 51 that is attached to the skin material 3, and an insertion portion 52 into which the insertion portion 42 of the locking member 4 is inserted.

[0021] The mounting portion 51 has a plate shape that is disposed along, for example, the XZ plane. In this embodiment, the edge portions 31 of two sheets of skin material 3 are overlapped on a mounting surface 511 that faces the -Y side of the mounting portion 51, and the mounting portion 51 and the edge portions 31 of the skin material 3 are sewn together.

[0022] The inserted portion 52 comprises a first leg portion 521 and a second leg portion 522 facing each other in the Y direction with a gap between them, a connecting portion 53 connecting the base ends 521R, 522R of the first leg portion 521 and the second leg portion 522 and connected to the mounting portion 51, and a main engagement portion 54 and a temporary engagement portion 55 provided on the first leg portion 521.

[0023] The first leg 521 and the second leg 522 each extend in the −Z direction from the connecting portion 53. That is, the base ends 521R and 522R of the first leg 521 and the second leg 522 are connected to the connecting portion 53.

[0024] The first leg portion 521 has an inner surface 521A that faces inward in the Y direction on the +Z side of the main engagement portion 54. The inner surface 521A has a planar shape that is disposed along the Z direction. The main engagement portion 54 and the temporary engagement portion 55 each protrude inward in the Y direction from the inner surface 521A.

[0025] The second leg portion 522 has an inner surface 522A facing inward in the Y direction. This inner surface 522A has a planar shape that is disposed along the Z direction. The inner surface 522A of the second leg portion 522 faces the inner surface 521A of the first leg portion 521 in the Y direction. Second leg 522 also has inclined surface 523 formed continuously with inner surface 522A at tip 522F of second leg 522. Inclined surface 523 is inclined with respect to the Z direction so as to face the -Z side and inward in the Y direction.

[0026] The connecting portion 53 extends along the Y direction. An end 531 on the +Y side of the connecting portion 53 is connected to the mounting portion 51 and also to the first leg portion 521. As a result, in this embodiment, the mounting portion 51 and the first leg portion 521 are formed to be continuous in the Z direction. On the other hand, an end 532 on the -Y side of the connecting portion 53 is connected to the second leg portion 522. The connecting portion 53 also has a flat surface 533 that faces the direction opposite to the direction in which the first leg portion 521 and the second leg portion 522 extend from the connecting portion 53, i.e., that faces the -Z side.

[0027] FIG. 2 is an enlarged view of the full engagement portion 54 and the temporary engagement portion 55. As shown in FIG. 2, main engagement portion 54 protrudes from a portion of first leg 521 on the +Z side of temporary engagement portion 55 toward second leg 522. Specifically, main engagement portion 54 has main engagement guide surfaces 541 facing the tip side (-Z direction) of first leg 521 and the second leg 522 side (-Y direction), and main engagement surface 542 facing the base end side (+Z direction) of first leg 521. Main engagement surface 542 is preferably arranged along the XY plane.

[0028] The temporary engagement portion 55 protrudes from the tip end 521F of the first leg portion 521 toward the second leg portion 522. Specifically, the temporary engagement portion 55 has temporary engagement guide surfaces 551 facing the tip side (-Z direction) of the first leg portion 521 and the second leg portion 522 side (-Y direction), and a temporary engagement surface 552 facing the base end side (+Z direction) of the first leg portion 521. The temporary engagement surface 552 is inclined with respect to the XY plane so that it is positioned lower as it moves inward in the Y direction.

[0029] In this embodiment, an accommodation space S1 capable of accommodating the swelling portion 422 of the locking member 4 is formed between the main engagement portion 54 and the connecting portion 53 and between the first leg portion 521 and the second leg portion 522. Here, it is preferable that the Z-direction dimension H1 of the accommodation space S1 is equal to or greater than the Z-direction dimension H2 of the swelling portion 422. It is also preferable that the Y-direction dimension D1 of the gap between the first leg portion 521 and the second leg portion 522 that sandwich the accommodation space S1 is equal to the maximum Y-direction dimension D2 of the swelling portion 422 (see FIG. 1). As shown in FIG. 2, a space S2 is formed between the provisional engagement surface 552 and the full engagement guide surface 541 so that a portion of one side of the enlarged portion 422 in the Y direction can enter therein.

[0030] In this embodiment, the protruding tip of the full engagement portion 54 is located closer to the second leg portion 522 (more inward in the Y direction) than the protruding tip of the temporary engagement portion 55. This ensures a large dimension in the Y direction of the full engagement surface 542. Specifically, the dimension D3 in the Y direction of the full engagement surface 542 is larger than the dimension D4 in the Y direction of the temporary engagement surface 552.

[0031] In the present embodiment, the arrangement angles of full-engagement guide surface 541 and temporary-engagement guide surface 551 are different from each other. Specifically, inclination angle θ1 of full-engagement guide surface 541 with respect to the XZ plane is smaller than inclination angle θ2 of temporary-engagement guide surface 551 with respect to the XZ plane. Here, tip end 521F of first leg portion 521 is bent outward in the Y direction, thereby ensuring a large dimension of temporary-engagement guide surface 551 in the Y direction.

[0032] The locking members 4 and upholstery material attaching fixtures 5 described above are each formed continuously along the X direction, and the length dimensions of the locking members 4 and upholstery material attaching fixtures 5 in the X direction are set appropriately. Furthermore, although not shown, a plurality of upholstery material attachment devices 5 may be attached at predetermined intervals to the edge portion 31 of the upholstery material 3. In this case, a plurality of locking members 4 may be provided in the groove 21 of the cushion material 2 at predetermined intervals along the length of the groove 21, and corresponding locking members 4 and upholstery material attachment devices 5 may engage with each other.

[0033] (How to attach the skin) A method for attaching the upholstery material 3 using the upholstery material attachment structure 1 of this embodiment will be described with reference to Figures 3 to 5. In Figures 3 to 5, for the sake of simplicity, the upholstery material 3 is omitted, and the basic outline of the groove 21 of the cushion material 2 is shown by a two-dot chain line.

[0034] First, the worker prepares the upholstery material attachment tool 5 to which the upholstery material 3 is attached and the cushion material 2 to which the locking member 4 is attached in the groove 21, and places the upholstery material 3 so as to cover the cushion material 2. Then, the worker inserts the upholstery material attachment tool 5 into the groove 21 of the cushion material 2, as shown in FIG.

[0035] When the upholstery material attaching tool 5 is inserted into the groove 21, the upholstery material attaching tool 5 approaches the locking member 4 in a state tilted from the locked position with the locking member 4 due to the shape of the cushion material 2, the tension applied to the upholstery material 3, and the like. Specifically, the upholstery material attaching tool 5 approaches the locking member 4 in a state where the extension directions of the first leg portion 521 and the second leg portion 522 are tilted with respect to the depth direction of the groove 21. When the upholstery material attaching tool 5 approaches the locking member 4 in this way, the temporary engagement guide surface 551 of the first leg portion 521 and the inclined surface 523 of the second leg portion 522 each press against the inclined surface 425 of the locking member 4. Then, the bulging portion 422 of the locking member 4 is guided toward the gap between the first leg portion 521 and the second leg portion 522. At this time, any portion of first leg portion 521 or connecting portion 53 elastically deforms, causing bulging portion 422 to climb over temporary engagement portion 55. As a result, as shown in FIG. 4, a part of the +Y side of bulging portion 422 enters space S2 between main engagement guide surface 541 and temporary engagement surface 552.

[0036] 4, the temporary engagement surface 552 of the upholstery material attaching tool 5 abuts against the swollen portion 422 (specifically, the edge of the engaged surface 424) of the locking member 4, thereby temporarily engaging the upholstery material attaching tool 5 with the locking member 4. This makes it possible to temporarily maintain the state in which the insertion portion 42 of the locking member 4 is shallowly inserted between the first leg portion 521 and the second leg portion 522. During the provisional engagement, the worker may adjust the posture of the upholstery material fastener 5 as shown by the imaginary lines in Figure 5. This positions the flat surface 533 of the upholstery material fastener 5 along the ZY plane.

[0037] Next, a pressing portion (not shown) of the automatic machine is placed above the groove 21 of the cushion material 2. Then, the automatic machine lowers the pressing portion toward the groove 21, thereby applying pressure to the cover material attaching tool 5. The automatic machine may lower the pressing portion using any driving mechanism such as a cylinder.

[0038] 4 or the virtual line in FIG. 5, when pressure is applied to the upholstery material attaching device 5, the inclined surface 425 of the locking member 4 presses against the full-engagement guide surface 541 of the first leg portion 521, and the bulging portion 422 of the locking member 4 is guided toward the accommodation space S1 of the inserted portion 52. At this time, any portion of the first leg portion 521 or the connecting portion 53 elastically deforms, causing the bulging portion 422 to climb over the full-engagement portion 54. As a result, as shown by the solid line in FIG. 5, the bulging portion 422 enters the accommodation space S1, and the full-engagement portion 54 enters the recess 423 of the locking member 4.

[0039] 5, the insertion portion 42 is inserted deeper between the first leg portion 521 and the second leg portion 522, and the main engagement surface 542 abuts against the expanded portion 422 (specifically, the engaged surface 424). As a result, the upholstery material attaching tool 5 is main engaged with the locking member 4, i.e., is locked by the locking member 4. In the final engagement, the contact area of ​​the final engagement surface 542 with the engaged surface 424 is larger than the contact area of ​​the temporary engagement surface 552 with the engaged surface 424 during the temporary engagement. This allows the upholstery material attaching tool 5 to be securely held by the locking member 4.

[0040] As described above, the cover material mounting structure 1 can mount the cover material 3 to the cushion material 2. In addition, when multiple skin material fasteners 5 are attached to the edge portion 31 of the skin material 3, some of the multiple skin material fasteners 5 may be provisionally engaged before all of the skin material fasteners 5 are fully engaged.

[0041] (Effects of this embodiment) As described above, the upholstery material attaching tool 5 in this embodiment is provisionally engaged with the locking member 4, thereby temporarily maintaining a state in which the insertion portion 42 of the locking member 4 is shallowly inserted between the first leg portion 521 and the second leg portion 522. Thereafter, by applying pressure to the upholstery material attaching tool 5 using a pressing means such as an automatic machine, the insertion portion 42 is inserted more deeply between the first leg portion 521 and the second leg portion 522, and the upholstery material attaching tool 5 can be fully engaged with the locking member 4. Therefore, in this embodiment, the upholstery material 3 can be reliably attached using the pressing means. In this embodiment, the force required for temporary engagement is smaller than the force required for permanent engagement, because temporary engagement portion 55 is located closer to the tip of first leg portion 521 than permanent engagement portion 54. Therefore, the worker performs the temporary engagement and a pressing means such as an automatic machine performs the permanent engagement, thereby reducing the burden on the worker involved in attaching upholstery material 3.

[0042] In this embodiment, the main engagement portion 54 has a main engagement guide surface 541 that is inclined with respect to the extension direction (Z direction) of the first leg portion 521 so as to face the tip side (-Z side) of the first leg portion 521, and a main engagement surface 542 that faces the base side (+Z side) of the first leg portion 521 and can engage with the insertion portion 42, and the main engagement surface 542 forms a storage space S1 between the connecting portion 53 and the main engagement surface 542 in which the insertion portion 42 is arranged. In such a configuration, the main engagement guide surface 541 can guide the provisionally engaged insertion portion 42 into the accommodation space S1, and the main engagement surface 542 can abut against the insertion portion 42 accommodated in the accommodation space S1. This allows the main engagement to be performed suitably.

[0043] In this embodiment, the temporary engagement portion 55 has a temporary engagement guide surface 551 inclined with respect to the extension direction (Z direction) of the first leg portion 521 so as to face the tip side (-Z side) of the first leg portion 521, and a temporary engagement surface 552 facing the base side (+Z side) of the first leg portion 521 and capable of engaging with the insertion portion 42, and the temporary engagement surface 552 forms a space S2 between the temporary engagement surface 552 and the main engagement portion 54 into which part of the insertion portion 42 can enter. In such a configuration, the provisional engagement guide surface 551 can guide the insertion portion 42 toward the gap between the first leg portion 521 and the second leg portion 522, and the provisional engagement surface 552 can abut against the insertion portion 42 inserted into the gap between the first leg portion 521 and the second leg portion 522. This allows for suitable provisional engagement. In this embodiment, the full engagement guide surface 541 of the full engagement portion 54 can guide the insertion portion 42 disposed in the space S2, so that the transition from provisional engagement to full engagement can be made smoothly.

[0044] In this embodiment, the tip 521F of the first leg 521 is bent toward the opposite side to the second leg 522 (outward in the Y direction), and the provisional engagement guide surface 551 is formed on the tip 521F of the first leg 521. According to this configuration, the provisional engagement guide surface 551 for guiding the insertion portion 42 can be secured widely in the Y direction.

[0045] In this embodiment, the connecting portion 53 has a flat surface 533 that faces in the direction opposite to the direction in which the first leg portion 521 and the second leg portion 522 extend from the connecting portion 53 (the +Z side). In this configuration, when the upholstery material fitting device 5 is provisionally engaged, the flat surface 533 can be positioned so as to face the opening 21A of the groove 21, and therefore, pressure in the Z direction can be suitably applied to the flat surface 533 by a pressing means such as an automatic machine.

[0046] In this embodiment, the first leg portion 521 and the attachment portion 51 are both connected to an end portion 531 of the connecting portion 53 on the +Y side. According to this configuration, the flat surface 533 of the connecting portion 53 can be secured to be wider.

[0047] In this embodiment, the second leg 522 has an inner surface 522A facing the first leg 521 and arranged along the extension direction (Z direction) of the second leg 522, and an inclined surface 523 facing the first leg 521 and the tip side of the second leg 522 and formed continuously with the inner surface 522A. In this configuration, the second leg 522, unlike the first leg 521, does not have a protruding shape such as the full engagement portion 54 or the provisional engagement portion 55. This reduces unnecessary interference from the second leg 522 to the locking member 4, particularly when the upholstery material attaching tool 5 is tilted from the locked position with the locking member 4, and provisional engagement can be performed reliably.

[0048] (Variation) The upholstery material mounting structure 1 of the embodiment includes the locking member 4 attached to the groove 21 of the cushion material 2 and the upholstery material mounting fixture 5 attached to the upholstery material 3, but the present invention is not limited to this. For example, as shown in Fig. 6, a modified upholstery material mounting structure 1A may include an upholstery material mount 5A mounted in a groove 21 of the cushion material 2, and a locking member 4A mounted to the upholstery material 3. In such a modified example, the locking member 4A may not include the base 41 of the first embodiment, and the edge portion 31 of the upholstery material 3 may be attached to the wall portion 421 by sewing or the like. Furthermore, the upholstery material mount 5A may include mounting portions 51A extending from the connecting portion 53 on both sides in the Y direction, instead of the mounting portions 51 of the first embodiment. Each mounting portion 51A may be attached to the cushion material 2 by being embedded in the bottom of the groove 21 of the cushion material 2. The method for attaching a skin material according to a modified example shown in Figure 6 is substantially the same as the method for attaching a skin material according to the above embodiment, except that the positional relationship between the locking member 4A and the skin material fastener 5A is reversed from that of the above embodiment. That is, the skin material fastener 5A according to the modified example can be provisionally and fully engaged with the locking member 4, as in the above embodiment. Note that Figure 6 shows the state in which the skin material fastener 5A is provisionally engaged with the locking member 4A.

[0049] In the embodiment described above, second leg 522 is not provided with final engagement portion 54 and provisional engagement portion 55, but the present invention is not limited to this. That is, first leg 521 and second leg 522 may be provided with final engagement portion 54 and provisional engagement portion 55, respectively. Note that final engagement portion 54 and provisional engagement portion 55 provided on second leg 522 may have left-right reversed configurations of final engagement portion 54 and provisional engagement portion 55 provided on first leg 521. When provisional engagement is performed in such a modified example, provisional engagement portion 55 on at least one of first leg 521 or second leg 522 may engage with insertion portion 42.

[0050] In the above embodiment, the attachment portion 51 and the first leg portion 521 are formed so as to be continuous in the Z direction, but the present invention is not limited to this. That is, in the above embodiment, the connection position of the attachment portion 51 with respect to the inserted portion 52 can be changed as desired. For example, as shown in FIG. 7, in a skin material mounting fixture 5B of a modified skin material mounting structure 1B, the mounting portion 51 may be connected to the -Y side end 532 of the connecting portion 53, so that the mounting portion 51 and the second leg portion 522 are continuous in the Z direction. Alternatively, the attachment portion 51 may be connected to the intermediate portion between the first leg portion 521 and the second leg portion 522, that is, the intermediate portion of the connecting portion 53 in the Y direction. In these modified examples, the same method of attaching the skin material as in the above embodiment can be carried out.

[0051] The detailed shape of the upholstery material attaching tool 5 in the above embodiment may be changed other than as described above. For example, the connecting portion 53 may not have the flat surface 533, the full-engagement portion 54 may not have the full-engagement guide surface 541, and the provisional engagement portion 55 may not have the provisional engagement surface 552.

[0052] In the above embodiment, a case where a plurality of skin material fasteners 5 are attached to the edge portion 31 of the skin material 3 has been described, but the skin material fasteners 5 are not limited to such an example of use. For example, a skin material fastener 5 having a certain degree of dimension in the X direction may be attached to the edge portion 31 of the skin material 3. In this case, a part of the X direction range of the skin material fastener 5 may be provisionally engaged. In this case, the part of the skin material fastener 5 between the provisionally engaged part and the non-provisionally engaged part may be elastically deformed. Alternatively, a slit may be formed in the relevant part of the skin material fastener 5.

[0053] In the above embodiment, the pressing unit of an automatic machine is used as the pressing means, and the case where the pressing unit is used to perform the final engagement of the cover material attaching tool 5 is described, but the present invention is not limited to this. The pressing means may be any means, such as a jig operated by an operator. [Explanation of symbols]

[0054] DESCRIPTION OF SYMBOLS 1, 1A...cover material mounting structure, 2...cushion material, 21...groove, 211...first groove wall surface, 212...second groove wall surface, 3...cover material, 31...edge portion, 4...locking member, 41...base portion, 42...insertion portion, 421...wall portion, 422...bulge portion, 423...recess, 424...engagement surface, 425...inclined surface, 426...end surface, 4A...locking member, 5, 5A...cover material mounting fixture, 51, 51A...mounting portion, 511... Mounting surface, 52...inserted portion, 521...first leg portion, 521A...inner surface, 521F...tip portion, 522...second leg portion, 522A...inner surface, 523...inclined surface, 53...connecting portion, 531, 532...end portion, 533...flat surface, 54...actual engagement portion, 541...actual engagement guide surface, 542...actual engagement surface, 55...provisional engagement portion, 551...provisional engagement guide surface, 552...provisional engagement surface, S1...accommodation space, S2...space.

Claims

1. A cover material attachment (5, 5A) for attaching a cover material (3) to a cushion material (2), an attachment portion (51, 51A) attached to one of the grooves (21) of the cover material (3) or the cushion material (2); an inserted portion (52) into which an inserting portion (42) of a locking member (4, 4A) attached to the other of the groove (21) of the cover material (3) or the cushion material (2) is inserted, The inserted portion (52) is a first leg portion (521) and a second leg portion (522) extending in one direction and facing each other; a connecting portion (53) that connects the base ends (521R, 522R) of the first leg portion (521) and the second leg portion (522) and is connected to the mounting portion (51, 51A); a main engagement portion (54) that protrudes from the first leg portion (521) toward the second leg portion (522) and is engageable with the insertion portion (42); a temporary engagement portion (55) that protrudes from the first leg portion (521) toward the second leg portion (522) at a position closer to the tip of the first leg portion (521) than the main engagement portion (54) and is engageable with the insertion portion (42).

2. The main engagement portion (54) is a main engagement guide surface (541) inclined with respect to the extension direction of the first leg portion (521) so as to face the tip side of the first leg portion (521); a main engagement surface (542) facing the base end side of the first leg portion (521) and capable of engaging with the insertion portion (42); 2. The upholstery material attaching tool according to claim 1, wherein the main engagement surface (542) forms a housing space (S1) between the main engagement surface (542) and the connecting portion (53) in which the insertion portion (42) is disposed.

3. The temporary engagement portion (55) is a provisional engagement guide surface (551) inclined with respect to the extension direction of the first leg portion (521) so as to face the tip side of the first leg portion (521); a temporary engagement surface (552) facing the base end side of the first leg portion (521) and capable of engaging with the insertion portion (42); 3. The upholstery material attaching tool according to claim 1, wherein the temporary engagement surface (552) forms a space (S2) between the temporary engagement surface (552) and the full engagement portion (54) into which a part of the insertion portion (42) can enter.

4. The tip end (521F) of the first leg (521) is bent toward the opposite side to the second leg (522), 4. The skin material attaching tool according to claim 3, wherein the provisional engagement guide surface (551) is formed on the tip end (521F) of the first leg portion (521).

5. The mounting portion (51) is attached to the skin material (3), 2. The upholstery material attachment tool according to claim 1, wherein the connecting portion (53) has a flat surface (533) facing in a direction opposite to a direction in which the first leg portion (521) and the second leg portion (522) extend from the connecting portion (53).

6. 6. The upholstery material attachment tool according to claim 5, wherein one of the first leg portion (521) or the second leg portion (522) and the attachment portion (51) are both connected to ends (531, 532) of the connecting portion (53) arranged on one side in the width direction of the groove (21).

7. The second leg (522) is An inner surface (522A) facing the first leg portion (521) and arranged along the extension direction of the second leg portion (522); 2. The upholstery material attaching tool according to claim 1, further comprising: an inclined surface (523) facing the first leg portion (521) and the tip end side of the second leg portion (522), and formed continuously with the inner surface (522A).

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