Vehicle interior member

Abstract

To simplify the processing of the ends of a skin material at the corners of a base material.SOLUTION: A vehicle interior member 10 includes: a base material 12; and a skin material 14 disposed on a front surface side of the base material 12. The skin material 14 has: first folded portions 18 folded back onto a back surface side of the base material 12 at one of two sides forming corners 16A, 16B, and 16C of the base material 12; second folded portions 20 folded back onto the back surface side of the base material 12 at the other of the two sides forming the corners 16A, 16B, and 16C; and third folded portions 22 folded back onto the back surface side of the base material 12 at the corners 16A, 16B, and 16C and secured to the first folded portion 18 and the second folded portion 20.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an interior member for a vehicle. [Background technology]

[0002] Various interior components, such as instrument panels, floor consoles, door trims, and pillar garnishes, are arranged in the passenger compartment of a vehicle such as an automobile. These interior components significantly contribute to the texture and atmosphere of the passenger compartment, and therefore some interior components are made of synthetic resin base material molded into a desired shape and then covered with a skin material to enhance the texture. Various materials have been put into practical use as such skin materials, including, for example, woven fabrics, knitted fabrics, synthetic resins, and genuine leather.

[0003] When attaching a skin material to a substrate, the skin material is shaped to be appropriately larger than the entire surface area of ​​the substrate and attached to the surface of the substrate. Next, the remaining end of the skin material, extending beyond the edge of the substrate, is wrapped around the back side of the substrate and fixed to the back side of the substrate using adhesive, a tacker, ultrasonic welding, or the like. At linear edges of the substrate, mechanized end processing of the skin material has been attempted, for example, as shown in Patent Document 1, where processing equipment is used to automatically perform this process. However, at corners of the substrate, simply bending the skin material around the corner creates wrinkles, making it difficult to mechanize end processing of the skin material. Therefore, in reality, end processing of the skin material at corner edges of the substrate is performed manually. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 6-23841 Summary of the Invention [Problem to be solved by the invention]

[0005] The end treatment of the skin material at the corner of the substrate involves folding the end of the skin material at one side of the corner of the substrate, pulling the end toward the back, and welding it to the substrate at multiple locations. Then, the end of the skin material folded at the other side of the corner of the substrate is welded to the substrate at multiple locations while being pulled toward the back. Finally, the end of the skin material folded at the corner of the substrate is welded to the substrate at multiple locations while being pulled toward the back. This process of welding the end of the skin material at the corner of the substrate requires a large number of welding steps, which is extremely time-consuming and reduces manufacturing efficiency.

[0006] The present invention has been proposed in view of the above-mentioned problems associated with the conventional technology in order to solve these problems in an advantageous manner, and aims to provide an interior component for a vehicle that allows for easy terminal processing of a skin material at corners of a base material. [Means for solving the problem]

[0007] A first aspect of the vehicle interior member according to the present invention is as follows: An interior member for a vehicle comprising a substrate and a skin material disposed on a surface side of the substrate, The skin material is a first folded portion folded back onto the back surface side of the base material at one of two sides forming a corner of the base material; a first engagement portion formed on the first folded portion and engaging with a first engagement receiving portion protruding from the rear surface of the base material; a second folded portion folded back onto the back surface side of the base material at the other of the two sides forming the corner portion; a second engagement portion formed on the second folded portion and engaging with a second engagement receiving portion protruding from the rear surface of the base material; The present invention is characterized in that it has a third folded portion that is folded back to the back side of the base material at the corner portion and is overlapped and fixed to the first folded portion and the second folded portion.

[0008] A second aspect of the vehicle interior member according to the present invention is the same as the first aspect, In a state before the first folded portion, the second folded portion, and the third folded portion are folded back, There may be a recess extending toward the edge of the substrate between the third folded portion and the first folded portion, and there may be a recess extending toward the edge of the substrate between the third folded portion and the second folded portion.

[0009] A third aspect of the vehicle interior member according to the present invention is the same as the second aspect, The third folded portion may have a base width narrower than a tip width.

[0010] A fourth aspect of the vehicle interior member according to the present invention is any one of the first aspect, the second aspect, and the third aspect, The dimension from the base to the tip of the third folded portion may be longer than the dimension from the base to the tip of the first folded portion and the dimension from the base to the tip of the second folded portion.

[0011] A fifth aspect of the vehicle interior member according to the present invention is any one of the first aspect, the second aspect, the third aspect, and the fourth aspect, The third folded portion may have a third engagement portion that engages with a third engagement receiving portion that protrudes from the rear surface of the base material.

[0012] A sixth aspect of the vehicle interior member according to the present invention is the same as the fifth aspect, the first engagement receiving portion has a first extending piece extending in a direction intersecting a protruding direction of the first engagement receiving portion, the second engagement receiving portion has a second extending piece extending in a direction intersecting a protruding direction of the second engagement receiving portion, the third engagement receiving portion has a third extending piece extending in a direction intersecting a protruding direction of the third engagement receiving portion, The first extension piece, the second extension piece, and the third extension piece may have different distances from the rear surface of the base material. [Effects of the Invention]

[0013] According to the vehicle interior member of the present invention, the edge treatment of the skin material at the corners of the base material can be simplified. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a perspective view showing a vehicle interior member according to an embodiment of the present invention; [Figure 2] FIG. 2 is a rear view showing the vehicle interior member according to the embodiment. [Figure 3] 1 is a rear view showing a vehicle interior member according to an embodiment with a skin material unfolded. FIG. [Figure 4] FIG. 3 is a cross-sectional view taken along line AA in FIG. 2. [Figure 5] FIG. 3 is an end view taken along line BB in FIG. 2. [Figure 6] FIG. 3 is an end view taken along line CC in FIG. 2. [Figure 7] FIG. 3 is an end view taken along line DD in FIG. 2. [Figure 8A] FIG. 10 is an explanatory diagram showing the skin material before the start of end treatment. [Figure 8B] FIG. 10 is an explanatory diagram showing the first stage of edge treatment of the skin material. [Figure 8C] FIG. 10 is an explanatory view showing a second stage of the end treatment of the skin material. [Figure 8D] FIG. 10 is an explanatory diagram showing a third stage of the end treatment of the skin material. [Figure 9] FIG. 10 is a rear view showing a main part of a vehicle interior member according to another embodiment. [Figure 10] FIG. 10 is a cross-sectional view taken along the line EE in FIG. 9. DETAILED DESCRIPTION OF THE INVENTION

[0015] Next, a preferred embodiment of a vehicle interior member according to the present invention will be described below with reference to the accompanying drawings. Note that the embodiments and drawings described below are intended to exemplify a portion of the embodiment of the present invention, and are not intended to limit the scope of the present invention to these configurations, and can be modified as appropriate within the scope of the gist of the present invention.

[0016] As shown in Fig. 1, a vehicle interior member 10 according to the embodiment includes a base material 12 and a skin material 14 disposed on the front side of the base material 12. In the vehicle interior member 10, the skin material 14 is formed to be slightly larger than the base material 12, and an end of the skin material 14 that extends outward from the edge of the base material 12 is folded back and fixed to the back side of the base material 12. Note that the front side of the vehicle interior member 10 is the side that faces the vehicle interior and is visible to occupants when the vehicle interior member 10 is installed, while the back side of the vehicle interior member 10 is the side that faces the vehicle body and is not visible to occupants when the vehicle interior member 10 is installed.

[0017] The substrate 12 is a hard, plate-like member that defines the shape of the vehicle interior member 10 and ensures the rigidity of the vehicle interior member 10. The substrate 12 is typically a resin molded product formed into a desired shape by injection molding or other methods using a synthetic resin such as polypropylene (PP). The substrate 12 is a polygon, such as a square, having outwardly protruding corners 16A, 16B, and 16C. The substrate 12 of this embodiment has a first corner 16A where the extensions of two sides of the substrate 12 form an acute angle, a second corner 16B where the extensions of the two sides of the substrate 12 form a right angle, and a third corner 16C where the extensions of the two sides of the substrate 12 form an obtuse angle. The surface of the substrate 12 is flat. Furthermore, a mounting portion (not shown) for mounting the vehicle interior member 10 to an attachment target, such as a vehicle body, is formed on the back surface of the substrate 12, on the inside away from the edge of the substrate 12. In the present embodiment, the corners 16A, 16B, and 16C refer to curved areas between two sides of the base material 12 that extend in different directions.

[0018] The skin material 14 is a component that forms the surface of the vehicle interior member 10. The skin material 14 is flexible and stretchable, and may have a grained finish or pseudo-stitching on the surface to create a genuine leather texture, for example. The skin material 14 is not limited to a single-layer structure, but may also have a multi-layer structure having a flexible surface layer that forms the surface of the skin material 14 and a back layer that is provided on the back side of the surface layer and is made of an elastic foam or the like. The surface layer may be made of, for example, polyurethane, olefin-based (TPO), vinyl chloride-based, or styrene-based elastomer, or polyurethane or vinyl chloride-based synthetic leather. The back layer may be made of, for example, polyurethane foam, foam made of an olefin-based material such as polyethylene or polypropylene, or styrene foam. The back layer may also be made of a nonwoven fabric or woven fabric. The surface layer and back layer of the skin material 14 are integrated by bonding the foam that forms the back layer to the surface layer by foam molding, or by bonding with an adhesive, frame lamination, or the like.

[0019] 2, the skin material 14 has a first folded portion 18 folded back onto the back surface of the base material 12 at one of the two sides that form the corners 16A, 16B, and 16C of the base material 12, a second folded portion 20 folded back onto the back surface of the base material 12 at the other of the two sides that form the corners 16A, 16B, and 16C, and a third folded portion 22 folded back onto the back surface of the base material 12 at the corners 16A, 16B, and 16C and fixed to overlap the first folded portion 18 and the second folded portion 20. In the termination process of the corners 16A, 16B, and 16C of the skin material 14, the first folded portion 18 and the second folded portion 20 are arranged to partially overlap each other. When the first fold portion 18 and the second fold portion 20 overlap, in this embodiment, the first fold portion 18 is positioned closer to the substrate 12 (front side) than the second fold portion 20, and the third fold portion 22 is positioned farther from the substrate 12 (back side) than the second fold portion 20 (see Figures 4 to 7).

[0020] 3, before the folded portions 18, 20, and 22 are folded back onto the back surface of the base material 12, the skin 14 has a notch 24 between the third folded portion 22 and the first folded portion 18 that faces the edge of the base material 12. Similarly, the skin 14 has a notch 24 between the third folded portion 22 and the first folded portion 18 that faces the edge of the base material 12. The skin 14 is separated into the third folded portion 22 and the first folded portion 18 by the notch 24 that is recessed from the tip side of the third folded portion 22 and the first folded portion 18 (the end side of the skin 14) toward the base side of the third folded portion 22 and the first folded portion 18 (the side that is folded back at the edge of the base material 12). The skin material 14 is separated into the third folded portion 22 and the second folded portion 20 by a recess 24 that is recessed from the tip side of the third folded portion 22 and the second folded portion 20 (the end side of the skin material 14) toward the base side of the third folded portion 22 and the second folded portion 20 (the side folded back at the edge of the base material 12). The recess 24 narrows from the side that opens outward toward the bottom side.

[0021] 2 and 3, the width of the base of the third folded portion 22 is narrower than the width of the tip of the third folded portion 22. In this way, the third folded portion 22 preferably has a narrowed base. The width of the base of the third folded portion 22 is set according to the circumferential lengths of the corners 16A, 16B, and 16C of the base material 12, and is preferably the same as or slightly larger than the circumferential lengths of the corners 16A, 16B, and 16C.

[0022] As shown in FIGS. 2 and 3 , in this embodiment, the first folded portion 18 between the first corner 16A and the third corner 16C has a first extension piece 18a at an edge adjacent to the third folded portion 22 folded back at the third corner 16C. The first extension piece 18a is formed to be longer from its base to its tip than the general portion of the first folded portion 18 away from the third corner 16C. In this way, the first extension piece 18a provides a longer folding margin in a portion of the first folded portion 18 near the third corner 16C. Similarly, the first folded portion 18 between the upper and lower second corners 16B has a first extension piece 18a at an edge adjacent to the third folded portion 22 folded back at the second corner 16B. The first extension piece 18a is formed to be longer from its base to its tip than the general portion of the first folded portion 18 away from the second corner 16B. In this way, the first folded portion 18 has a long folded margin in a partial area close to the second corner 16B due to the first extension piece 18a.

[0023] As shown in FIGS. 2 and 3 , in this embodiment, the second folded portion 20 between the upper second corner 16B and the third corner 16C has a second extension piece 20a at an edge adjacent to the third folded portion 22 folded at the upper second corner 16B and an edge adjacent to the third folded portion 22 folded at the third corner 16C. The second extension piece 20a is formed to have a longer dimension from its base to its tip than a general portion of the second folded portion 20 away from the second corner 16B and the third corner 16C. Thus, a portion of the second folded portion 20 near the second corner 16B and the third corner 16C has a longer folding margin due to the second extension piece 20a. Similarly, the second folded portion 20 between the lower second corner 16B and the first corner 16A has a second extension piece 20a at an edge adjacent to the third folded portion 22 folded at the lower second corner 16B. The second extension piece 20a is formed so that the dimension from the base to the tip is longer than the general portion away from the second corner 16B in the second folded portion 20. In this way, the folding margin is long in a part of the second folded portion 20 near the second corner 16B due to the second extension piece 20a.

[0024] In this embodiment, the length of the first extension piece 18a adjacent to the third corner 16C is set to a length that extends from one of the two sides forming the third corner 16C to the bisector L passing through the third corner 16C. The tip of the first extension piece 18a is located closer to the other of the two sides forming the third corner 16C than the bisector L passing through the third corner 16C. The length of the second extension piece 20a adjacent to the third corner 16C is set to a length that extends from the other of the two sides forming the third corner 16C to the bisector L passing through the third corner 16C. The tip of the second extension piece 20a is located closer to one of the two sides forming the third corner 16C than the bisector L passing through the third corner 16C. The length of the first extension piece 18a adjacent to the second corner 16B is set similarly to the length of the first extension piece 18a adjacent to the third corner 16C described above. The length of the second extension piece 20a adjacent to the second corner 16B is set to be the same as that of the second extension piece 20a adjacent to the third corner 16C described above.

[0025] In this embodiment, the first folded portion 18 does not have an extension portion such as the first extension piece 18a at the edge adjacent to the third folded portion 22 folded back at the first corner 16A. Similarly, the second folded portion 20 does not have an extension portion such as the second extension piece 20a at the edge adjacent to the third folded portion 22 folded back at the first corner 16A. The lengths of the first folded portion 18 and the second folded portion 20 may be appropriately set depending on the space on the back surface of the substrate 12. In this embodiment, because the space between the two sides forming the acute-angled first corner 16A is narrow, the lengths of the edges of the first folded portion 18 and the second folded portion 20 adjacent to the first corner 16A are set to be the same as those of a general portion.

[0026] 2 and 3, the dimension from the base to the tip of the third folded portion 22 folded back at the first corner 16A is longer than the dimension from the base to the tip of the first folded portion 18 and the dimension from the base to the tip of the second folded portion 20. Thus, the folding length of the third folded portion 22 folded back at the first corner 16A is longer than the folding lengths of the first folded portion 18 and the second folded portion 20 at their edges adjacent to the first corner 16A.

[0027] 2 and 3, in this embodiment, the dimension from the base to the tip of third folded portion 22 folded back at second corner 16B is the same as or approximately the same as the dimension from the base to the tip of first extension piece 18a of first folded portion 18 and the dimension from the base to the tip of second extension piece 20a of second folded portion 20. The dimension from the base to the tip of third folded portion 22 folded back at second corner 16B is longer than the dimension from the base to the tip of the general portion of first folded portion 18 and the dimension from the base to the tip of the general portion of second folded portion 20. In this way, the folding length of the third folding portion 22 that is folded back at the second corner 16B is the same as or approximately the same as the folding length of the first extension piece 18a (second extension piece 20a) adjacent to the second corner 16B in the first folding portion 18 (second folding portion 20), but is longer than the folding length of the general portion of the first folding portion 18 (second folding portion 20).

[0028] 2 and 3, the dimension from the base to the tip of the third folded portion 22 folded back at the third corner 16C is longer than the dimension from the base to the tip of the general portion of the first folded portion 18 and the dimension from the base to the tip of the general portion of the second folded portion 20. On the other hand, the dimension from the base to the tip of the third folded portion 22 folded back at the third corner 16C is shorter than the dimension from the base to the tip of the first extension piece 18a of the first folded portion 18 and the dimension from the base to the tip of the second extension piece 20a of the second folded portion 20. Thus, the folding length of the third folded portion 22 folded back at the third corner 16C is shorter than the folding length of the edge of the first folded portion 18 (second folded portion 20) adjacent to the third corner 16C.

[0029] 2 and 3, the skin 14 has a first engagement portion 28 formed in the first folded portion 18 that engages with a first engagement receiving portion 26 protruding from the back surface of the base material 12, and a second engagement portion 32 formed in the second folded portion 20 that engages with a second engagement receiving portion 30 protruding from the back surface of the base material 12. The skin 14 also has a third engagement portion 36 formed in the third folded portion 22 that engages with a third engagement receiving portion 34 protruding from the back surface of the base material 12. The skin 14 also has general engagement portions 40 formed in the first folded portion 18 and the second folded portion 20 that engage with a general engagement receiving portion 38 protruding from the back surface of the base material 12. The first engagement portions 28 refer to those formed in the first folded portion 18 at positions adjacent to the corners 16A, 16B, and 16C. Similarly, second engagement portions 32 refer to those formed at locations adjacent to corners 16A, 16B, 16C in second folded portion 20. The engagement portions 28, 32, 36, 40 may have any shape as long as they can be fixed to the corresponding engagement receiving portions 26, 30, 34, 38, and are preferably, for example, slits (in this embodiment) or openings that penetrate folded portions 18, 20, 22, because these can be formed together when punching out skin material 14 with a Thomson die or the like.

[0030] 2, the first engagement portion 28 formed on the first folded portion 18 extending from one of the two sides forming the first corner 16A is positioned closer to one of the two sides forming the first corner 16A than the bisector L passing through the first corner 16A. The second engagement portion 32 formed on the second folded portion 20 extending from the other of the two sides forming the first corner 16A is positioned closer to the other of the two sides forming the first corner 16A than the bisector L passing through the first corner 16A.

[0031] 2, the first engagement portion 28 formed on the first extension piece 18a extending from one of the two sides forming the second corner 16B is positioned closer to the other of the two sides forming the second corner 16B than the bisector L passing through the second corner 16B. The second engagement portion 32 formed on the second extension piece 20a extending from the other of the two sides forming the second corner 16B is positioned closer to one of the two sides forming the second corner 16B than the bisector L passing through the second corner 16B. The first engagement portion 28 of the first extension piece 18a and the second engagement portion 32 of the second extension piece 20a adjacent to the third corner 16C are the same as the first engagement portion 28 of the first extension piece 18a and the second engagement portion 32 of the second extension piece 20a adjacent to the second corner 16B.

[0032] 2 and 3, the first engagement receiving portion 26 adjacent to the first corner 16A is disposed on one side of the bisector L passing through the first corner 16A (the folded side of the first folded portion 18 of the base material 12). The second engagement receiving portion 30 adjacent to the first corner 16A is disposed on the other side of the bisector L passing through the second corner 16B (the folded side of the second folded portion 20 of the base material 12). The third engagement receiving portion 34 adjacent to the first corner 16A is disposed on the bisector L passing through the first corner 16A.

[0033] As shown in FIGS. 2 and 3 , the first engagement receiving portion 26 adjacent to the second corner 16B (third corner 16C) is disposed on the other side of the bisector L passing through the second corner 16B (third corner 16C) (the folded side of the second folded portion 20 of the base material 12). The second engagement receiving portion 30 adjacent to the second corner 16B (third corner 16C) is disposed on one side of the bisector L passing through the second corner 16B (third corner 16C) (the folded side of the first folded portion 18 of the base material 12). The third engagement receiving portion 34 adjacent to the second corner 16B (third corner 16C) is disposed on the bisector L passing through the second corner 16B (third corner 16C).

[0034] As shown in FIG. 5, the first engagement receiving portion 26 secures the folded-back portion of the first folded-back portion 18 adjacent to the corners 16A, 16B, and 16C. The first engagement receiving portion 26 protrudes from the back surface of the base material 12. The first engagement receiving portion 26 is formed in a hook shape having a first extending piece 26a extending in a direction intersecting the direction in which the first engagement receiving portion 26 protrudes from the base material 12. The first extending piece 26a extends, spaced apart from the back surface of the base material 12, in the opposite direction to one of the two sides that form the corners 16A, 16B, and 16C (the folded-back side of the first folded-back portion 18 of the base material 12).

[0035] As shown in FIG. 6 , the second engagement receiving portion 30 secures the folded portion of the second folded portion 20 adjacent to the corners 16A, 16B, and 16C. The second engagement receiving portion 30 protrudes from the back surface of the base material 12. The second engagement receiving portion 30 is formed in a hook shape having a second extending piece 30a extending in a direction intersecting the direction in which the second engagement receiving portion 30 protrudes from the base material 12. The second extending piece 30a extends away from the back surface of the base material 12 and in a direction opposite to the other of the two sides that form the corners 16A, 16B, and 16C (the folded side of the second folded portion 20 on the base material 12). In the second engagement receiving portion 30, the distance between the second extending piece 30a and the back surface of the base material 12 is set wider than the distance between the first extending piece 26a and the back surface of the base material 12, in accordance with the second folded portion 20 overlapping the first folded portion 18. The general engagement receiving portion 38 is formed in a hook shape similar to the first engagement receiving portion 26.

[0036] As shown in FIG. 7 , the third engagement receiving portion 34 secures the third folded portion 22 folded back at the corners 16A, 16B, and 16C. The third engagement receiving portion 34 protrudes from the back surface of the base material 12. The third engagement receiving portion 34 is formed in a hook shape with a third extending piece 34a extending in a direction intersecting the direction in which the third engagement receiving portion 34 protrudes from the base material 12. The third extending piece 34a extends away from the back surface of the base material 12 along a bisector L passing through the corners 16A, 16B, and 16C, leaving a gap between the third extending piece 34a and the back surface of the base material 12. In the third engagement receiving portion 34, the gap between the third extending piece 34a and the back surface of the base material 12 is set wider than the gap between the second extending piece 30a and the back surface of the base material 12 to match the third folded portion 22 overlapping the first folded portion 18 and the second folded portion 20. In this way, the first extending piece 26a, the second extending piece 30a, and the third extending piece 34a have different distances from the rear surface of the base material 12.

[0037] Next, the terminal treatment of the skin 14 will be described with reference to Figure 8. An adhesive or the like is applied to the back surface of the skin 14 and / or the front surface of the base material 12, and the skin 14 is placed on the front surface of the base material 12 and set in a jig (not shown) so that the back surface of the base material 12 is exposed to the outside (see Figure 8A). First, the first folded portion 18 extending from one side forming the corners 16A, 16B, and 16C is folded back at one side toward the back surface of the base material 12, and the first engagement portion 28 is hooked into the first engagement receptacle 26 and the general engagement portion 40 is hooked into the general engagement receptacle 38, thereby fixing the first folded portion 18 to the back surface of the base material 12 (see Figure 8B). At this time, when the first folded portion 18 is operated by holding the relatively long first extension piece 18a, it is easy to pull the first folded portion 18, and tension can be easily applied to the first folded portion 18 folded over on one side of the base material, thereby preventing wrinkles from occurring in the skin material 14 on one side of the base material 12.

[0038] Next, the second folded portion 20 extending from the other side forming the corners 16A, 16B, and 16C is folded back toward the back surface of the base material 12 at the other side, and the second folded portion 20 is overlapped on the first folded portion 18 that was previously folded back. Then, by hooking the second engagement portion 32 into the second engagement receiving portion 30 and the general engagement portion 40 into the general engagement receiving portion 38, the second folded portion 20 is overlapped on the first folded portion 18 and fixed to the back surface of the base material 12 (see FIG. 8C ). At this time, if the second folded portion 20 is manipulated by holding the relatively long second extension piece 20a, it is easy to pull the second folded portion 20 and apply tension to the second folded portion 20 folded back at the other side of the base material, which makes it possible to prevent wrinkles from occurring in the cover material 14 at one side of the base material 12.

[0039] Next, third folded portions 22 extending from corners 16A, 16B, and 16C are folded back toward the back surface of base material 12 at corners 16A, 16B, and 16C, so that third folded portion 22 overlaps first folded portion 18 and second folded portion 20 that were previously folded back. Then, third engaging portion 36 is hooked onto third engaging receptacle 34, so that third folded portion 22 overlaps first folded portion 18 and second folded portion 20 and is fixed to the back surface of base material 12 (see FIG. 8D ). Note that folded portions 18, 20, and 22 can be fixed simply by the engagement structure between engaging portions 28, 32, 36, and 40 and engaging receptacles 26, 30, 34, and 38. However, folded portions 18, 20, and 22 may also be welded to base material 12 by ultrasonic welding or the like, if necessary.

[0040] In the vehicle interior member 10, the first engagement portion 28 formed on the first folded portion 18 engages with the first engagement receiving portion 26 protruding from the back surface of the base material 12, thereby positioning the first folded portion 18, which is folded back at one side forming the corners 16A, 16B, and 16C, on the back surface side of the base material 12. In addition, the vehicle interior member 10, the second engagement portion 32 formed on the second folded portion 20 engages with the second engagement receiving portion 30 protruding from the back surface of the base material 12, thereby positioning the second folded portion 20, which is folded back at the other side forming the corners 16A, 16B, and 16C, on the back surface side of the base material 12. In this way, by fixing the first folded portion 18 by the engagement structure between the first engagement portion 28 and the first engagement receiving portion 26, the welding work for fixing the first folded portion 18 can be omitted or reduced. Furthermore, by fixing the second folded portion 20 by an engagement structure between the second engaging portion 32 and the second engagement receiving portion 30, the welding work for fixing the second folded portion 20 can be omitted or reduced. Furthermore, the third folded portion 22, which is folded back onto the back surface of the base material 12 at the corners 16A, 16B, and 16C of the base material 12, is fixed to overlap the first folded portion 18 and the second folded portion 20. Therefore, the first folded portion 18 and the second folded portion 20 are held by the third folded portion 22, so that the welding work for fixing the first folded portion 18 and the second folded portion 20 can be omitted or reduced. In this way, the vehicle interior member 10 described above reduces the effort required for edge treatment of the upholstery material 14 at the corners 16A, 16B, and 16C of the base material 12 and simplifies edge treatment of the upholstery material 14 at the corners 16A, 16B, and 16C.

[0041] In the vehicle interior member 10, the third engagement portion 36 formed on the third folded portion 22 engages with the third engagement receiving portion 34 protruding from the back surface of the base material 12, thereby disposing the third folded portion 22 folded at the corners 16A, 16B, and 16C on the back surface of the base material 12. In this manner, not only the first folded portion 18 and the second folded portion 20 but also the third folded portion 22 are fixed by the engagement structure between the third engagement portion 36 and the third engagement receiving portion 34, so that the welding work for fixing the folded portions 18, 20, and 22 can be omitted or reduced. The vehicle interior member 10 described above reduces the effort required for processing the ends of the skin material 14 at the corners 16A, 16B, and 16C of the base material 12 and simplifies the processing of the ends of the skin material 14 at the corners 16A, 16B, and 16C.

[0042] Before the first folded portion 18, the second folded portion 20, and the third folded portion 22 are folded back, the skin material 14 has a notch 24 between the third folded portion 22 and the first folded portion 18, and also has a notch 24 between the third folded portion 22 and the second folded portion 20. Because the first folded portion 18 is separated by the notch 24 and is independent of the third folded portion 22, the first folded portion 18 is easy to fold back, and wrinkles are less likely to form between the first folded portion 18 and the third folded portion 22. Similarly, because the second folded portion 20 is separated by the notch 24 and is independent of the third folded portion 22, the second folded portion 20 is easy to fold back, and wrinkles are less likely to form between the second folded portion 20 and the third folded portion 22.

[0043] By making the width of the base of third folded portion 22 narrower than the width of the tip, wrinkles are less likely to occur in third folded portion 22 at corners 16A, 16B, and 16C. In addition, because the width of the tip of third folded portion 22 is relatively wide, third folded portion 22 is easily pulled, and wrinkles can be prevented from occurring at the base of third folded portion 22 at corners 16A, 16B, and 16C.

[0044] By making the dimension from the base to the tip of the third folded portion 22 longer than the dimension from the base to the tip of the first folded portion 18 and the dimension from the base to the tip of the second folded portion 20, the third folded portion 22 can be easily pulled, and wrinkles can be prevented from occurring at the base of the third folded portion 22 at the corners 16A, 16B, and 16C.

[0045] Because the third folded portion 22 overlaps the first folded portion 18 and the second folded portion 20, the distance between the third folded portion 22 and the base material 12 is different from that between the first folded portion 18 and the second folded portion 20. The first extending piece 26a of the first engagement receiving portion 26, the second extending piece 30a of the second engagement receiving portion 30, and the third extending piece 34a of the third engagement receiving portion 34 have different distances from the back surface of the base material 12, so that the engaging portions 28, 32, 36 of the folded portions 18, 20, 22 can be easily engaged with the corresponding engaging receiving portions 26, 30, 34, and the terminal processing of the covering material 14 at the corners 16A, 16B, 16C can be simplified.

[0046] The third folded portion 22 overlaps the second folded portion 20 which overlaps the first folded portion 18. Because the first folded portion 18 is held by the second folded portion 20 and the first folded portion 18 and the second folded portion 20 are held by the third folded portion 22, it is possible to omit or reduce the welding work for fixing the first folded portion 18 and the second folded portion 20. In this way, according to the vehicle interior member 10 described above, the effort required for processing the ends of the skin material 14 at the corners 16A, 16B, and 16C of the base material 12 is reduced, and the end processing of the skin material 14 at the corners 16A, 16B, and 16C can be simplified.

[0047] By arranging first engagement receiving portion 26 for fixing first folded portion 18 folded back at one side of base material 12 closer to the other side of base material 12 than bisector L passing through corners 16A, 16B, and 16C of base material 12, the dimension from the base to the tip of first folded portion 18 becomes longer, making it easier to fold back first folded portion 18. Furthermore, by arranging second engagement receiving portion 30 for fixing second folded portion 20 folded back at the other side of base material 12 closer to one side of base material 12 than bisector L passing through corners 16A, 16B, and 16C of base material 12, the dimension from the base to the tip of second folded portion 20 becomes longer, making it easier to fold back second folded portion 20. By positioning the third engagement receiving portion 34 for fixing the third folded portion 22 folded at the corners 16A, 16B, and 16C of the base material 12 on the bisector L passing through the corners 16A, 16B, and 16C of the base material 12, it is possible to prevent wrinkles from forming at the base of the third folded portion 22 at the corners 16A, 16B, and 16C.

[0048] This disclosure describes the following: A skin material for a vehicle interior member that is placed on the surface side of a substrate, a first folded portion folded back onto the back surface side of the base material at one of two sides forming a corner of the base material; a first engagement portion formed on the first folded portion and engaging with a first engagement receiving portion protruding from the rear surface of the base material; a second folded portion folded back onto the back surface side of the base material at the other of the two sides forming the corner portion of the base material; a second engagement portion formed on the second folded portion and engaging with a second engagement receiving portion protruding from the rear surface of the base material; a third folded portion that is folded back onto the back surface of the base material at a corner of the base material and is overlapped and fixed to the first folded portion and the second folded portion.

[0049] (Example of change) The present invention is not limited to the above-mentioned matters, but may be, for example, as follows: Note that the present invention is not limited to the specific descriptions of the embodiment and the following modified examples. (1) In the above-described embodiment, the third folded portion is fixed by engaging the third engaging portion with the third engagement receiving portion, but this is not limited to this. As shown in Figures 9 and 10, the third folded portion 22 may be disposed on the back surface side of the base material 12 by engaging the third engaging portion 36 formed on the third folded portion 22 with the first engagement receiving portion 26 and / or the second engagement receiving portion 30. As in another embodiment, by sharing the means for fixing the third folded portion 22 with the first folded portion 18 and / or the second folded portion 20, the space on the back surface side of the base material 12 can be effectively utilized. (2) The vehicle interior member can be applied to vehicles such as automobiles, railway vehicles such as electric trains and steam locomotives, ships, and aircraft. (3) In processing the ends of the corners of the skin material, the first folded portion 18 and the second folded portion 20 do not need to be arranged to overlap each other (see FIGS. 9 and 10). [Explanation of symbols]

[0050] 10 Vehicle interior member, 12 Base material, 14 Skin material, 16A First corner portion, 16B second corner portion, 16C third corner portion, 18 first folded portion, 20 second folded portion, 22 third folded portion, 24 recess, 26 first engagement receiving portion, 26a first extension piece, 28 first engaging portion, 30 second engaging receiving portion, 30a second extending piece, 32 second engaging portion, 34 third engagement receiving part, 34a third extension piece, 36 third engagement part

Claims

1. An interior member for a vehicle comprising a substrate and a skin material disposed on a surface side of the substrate, The skin material is a first folded portion folded back onto the back surface side of the base material at one of two sides forming a corner of the base material; a first engagement portion formed on the first folded portion and adapted to engage with a first engagement receiving portion protruding from a rear surface of the base material; a second folded portion folded back onto the back surface side of the base material at the other of the two sides forming the corner portion; a second engagement portion formed on the second folded portion and adapted to engage with a second engagement receiving portion protruding from the rear surface of the base material; a third folded portion folded back onto the back surface of the base material at the corner portion and secured to the first folded portion and the second folded portion.

2. In a state before the first folded portion, the second folded portion, and the third folded portion are folded back, 2. The vehicle interior member according to claim 1, wherein a recess extending toward an edge of the base material is formed between the third folded portion and the first folded portion, and a recess extending toward an edge of the base material is formed between the third folded portion and the second folded portion.

3. The vehicle interior member according to claim 2, wherein the third folded portion has a base width narrower than a tip width.

4. 2. The vehicle interior member according to claim 1, wherein a dimension from a base to a tip of the third folded portion is longer than a dimension from a base to a tip of the first folded portion and a dimension from a base to a tip of the second folded portion.

5. The vehicle interior member according to claim 1, wherein the third folded portion has a third engaging portion that engages with a third engaging receiving portion that protrudes from the back surface of the base material.

6. the first engagement receiving portion has a first extending piece extending in a direction intersecting a protruding direction of the first engagement receiving portion, the second engagement receiving portion has a second extending piece extending in a direction intersecting a protruding direction of the second engagement receiving portion, the third engagement receiving portion has a third extending piece extending in a direction intersecting a protruding direction of the third engagement receiving portion, The vehicle interior member according to claim 5, wherein the first extension piece, the second extension piece, and the third extension piece are spaced from the rear surface of the base material at different intervals.

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