Decorative sheet attaching method, decorative sheet molding method, and decorative sheet processing device, and pre-molding jig

Abstract

To improve a designability of a decorative sheet attached to an adherend having a three-dimensional shape.SOLUTION: An attaching method of a decorative sheet 20 includes a molding step of pre-molding the decorative sheet 20 by using a jig 30, and an attaching step of attaching the pre-molded decorative sheet 20 to an adherend AB. The jig 30 includes a first bending part 41 and a second bending part 42 that extends in a direction non-parallel to the direction in which the first bending part 41 extends. In the molding step, the decorative sheet 20 is molded so as to include: a base part 25 extending over a base surface 40 defined by the first bending part 41 and the second bending part 42 by pulling the decorative sheet 20 and bending it at the first bending part 41 and the second bending part 42; a first side part 26 that is connected to the base part 25 at the first bending part 41 and is bent relative to the base part 25 at the first bending part 41; and a second side part 27 that is connected to the base part 25 at a second bending part 42 and is bent relative to the base part 25 at the second bending part 42.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a decorative sheet attachment method, a decorative sheet forming method, a decorative sheet processing device, and a preforming jig. [Background technology]

[0002] A decorative sheet for application to a moving body is known, as shown in Patent Document 1. By attaching the decorative sheet to an adherend, the design of the moving body is improved. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2021-160220 A Summary of the Invention [Problem to be solved by the invention]

[0004] There is a demand for attaching a decorative sheet to an adherend having a three-dimensional shape. However, the decorative sheet attached to such an adherend generates wrinkles and sagging. When the wrinkles and sagging of the decorative sheet are observed, the design of the decorative sheet is deteriorated. The present disclosure aims to improve the design of the decorative sheet attached to an adherend having a three-dimensional shape. [Means for solving the problem]

[0005] A decorative sheet attachment method according to one embodiment of the present disclosure includes: A molding step of preforming a decorative sheet using a jig; and a bonding step of bonding the preformed decorative sheet to an adherend, The jig includes a first bent portion and a second bent portion extending in a direction non-parallel to a direction in which the first bent portion extends, In the forming step, the decorative sheet is pulled and bent at the first curved portion and the second curved portion to form the decorative sheet to include a base portion extending on a base surface defined by the first curved portion and the second curved portion, a first side portion connected to the base portion on the first curved portion and bent relative to the base portion on the first curved portion, and a second side portion connected to the base portion on the second curved portion and bent relative to the base portion on the second curved portion, the adherend includes a main adhesion portion, a first side adhesion portion connected to the main adhesion portion and extending along a first direction, and a second side adhesion portion connected to the main adhesion portion and extending along a second direction non-parallel to the first direction; The attachment process includes a positioning process of positioning the decorative sheet on the substrate so that the base portion is located on the main attachment portion, the first side portion faces the first side attachment portion, and the second side portion faces the second side attachment portion, and a joining process of joining the decorative sheet to the substrate.

[0006] A decorative sheet forming method according to one embodiment of the present disclosure includes: A molding step of preforming a decorative sheet using a jig is provided, The jig includes a first bent portion and a second bent portion extending in a direction non-parallel to a direction in which the first bent portion extends, In the forming step, the decorative sheet is formed by pulling the decorative sheet and bending it at the first bent portion and the second bent portion.

[0007] A decorative sheet processing apparatus according to an embodiment of the present disclosure includes: A molding device for preforming a decorative sheet is provided, The molding device includes a jig, the jig including a first bent portion and a second bent portion extending in a direction non-parallel to a direction in which the first bent portion extends; The forming device forms the decorative sheet by pulling it and bending it at the first bent portion and the second bent portion.

[0008] A preforming jig according to one embodiment of the present disclosure includes: A preforming jig for preforming a decorative sheet having a shape with a first edge, a second edge, and a corner located between the first edge and the second edge, A first curved portion and a second curved portion extending in a direction non-parallel to the direction in which the first curved portion extends, The first curved edge portion extends along the first edge of the decorative sheet, The second curved edge portion extends along the second edge of the decorative sheet. Effect of the Invention

[0009] According to the present disclosure, it is possible to improve the design of a decorative sheet that is attached to an adherend having a three-dimensional shape. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a diagram for explaining an embodiment of the present invention, and is an exploded perspective view of a decoration moving body. [Diagram 2] FIG. 2 is a cross-sectional view of a decoration member in the decoration moving body of FIG. [Diagram 3] FIG. 3 is a diagram for explaining a method of attaching a decorative sheet to the decorative mobile body of FIG. [Figure 4] FIG. 4 is a diagram for explaining a method of attaching a decorative sheet to the decorative mobile body of FIG. [Diagram 5] FIG. 5 is an enlarged perspective view of the jig shown in FIG. [Figure 6] FIG. 6 is a diagram for explaining a method of attaching a decorative sheet to the decorative mobile body of FIG. [Figure 7] FIG. 7 is a cross-sectional view showing an adherend, a jig, and a decorative sheet including a base portion and a first side portion. [Figure 8] FIG. 8 is a diagram for explaining a method of attaching a decorative sheet to the decorative mobile body of FIG. [Figure 9] FIG. 9 is a perspective view showing a modification of the jig shown in FIG. [Figure 10] FIG. 10 is a perspective view showing another modified example of the jig shown in FIG. [Figure 11] FIG. 11 is a perspective view showing still another modified example of the jig shown in FIG. [Figure 12] FIG. 12 is a plan view that illustrates a schematic diagram of a decorative sheet processing device. [Figure 13] FIG. 13 is a side view of the forming device in the decorative sheet processing apparatus of FIG. [Figure 14] FIG. 14 is a perspective view showing a jig and a decorative sheet of the molding device of FIG. [Figure 15] FIG. 15 is a perspective view showing the decorative sheet bent by the jig of FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] One embodiment of the present disclosure relates to the following [1] to

[18] .

[0012] [1] A molding step of preforming a decorative sheet using a jig; and a bonding step of bonding the preformed decorative sheet to an adherend, The jig includes a first bent portion and a second bent portion extending in a direction non-parallel to a direction in which the first bent portion extends, In the forming step, the decorative sheet is pulled and bent at the first curved portion and the second curved portion to form the decorative sheet to include a base portion extending on a base surface defined by the first curved portion and the second curved portion, a first side portion connected to the base portion on the first curved portion and bent relative to the base portion on the first curved portion, and a second side portion connected to the base portion on the second curved portion and bent relative to the base portion on the second curved portion, the adherend includes a main adhesion portion, a first side adhesion portion connected to the main adhesion portion and extending along a first direction, and a second side adhesion portion connected to the main adhesion portion and extending along a second direction non-parallel to the first direction; The attachment step includes a placement step of placing the decorative sheet on the substrate so that the base portion is located on the main attachment portion, the first side portion faces the first side attachment portion, and the second side portion faces the second side attachment portion, and a joining step of joining the decorative sheet to the substrate.

[0013] [2] The decorative sheet attachment method according to [1], wherein in the forming step, the heated decorative sheet is bent at the first bent portion and the second bent portion.

[0014] [3] The decorative sheet attachment method according to [1] or [2], wherein in the bonding step, the decorative sheet is bonded to the adherend while being shrunk.

[0015] [4] The decorative sheet attachment method according to [3], wherein in the bonding step, the decorative sheet is heated to cause the decorative sheet to shrink.

[0016] [5] In the molding step, the first side portion and the second side portion are bent toward a first side in a thickness direction of the base portion with respect to the base portion, The decorative sheet attachment method according to any one of [1] to [4], wherein in the attachment step, the first side portion and the second side portion are bent relative to the base portion toward a second side opposite the first side in the thickness direction of the base portion.

[0017] [6] The preformed decorative sheet includes a first extending portion extending from the first side portion and a second extending portion extending from the second side portion, The decorative sheet attachment method according to any one of [1] to [5], wherein the preformed decorative sheet has a first extension portion protruding at a portion where the first extension portion connects to the first side portion, and a second extension portion protruding at a portion where the second extension portion connects to the second side portion.

[0018] [7] The decorative sheet attachment method of any of [1] to [6], wherein the jig includes a first side extending in one direction from the first curved portion, a second side extending in the one direction from the second curved portion, a first edge contact portion extending from the first side and contacting an edge of the decorative sheet, and a second edge contact portion extending from the second side and contacting the edge of the decorative sheet.

[0019] [8] The jig includes a first plate-shaped portion and a second plate-shaped portion connected to each other, the fixture includes a support surface extending over the base surface; The support surface is constituted by a side end surface of the first plate-shaped portion and a side end surface of the second plate-shaped portion, a first side surface extending in one direction from the first curved portion is configured by a main surface of the first plate-shaped portion, The first curved portion is formed between the main surface of the first plate-shaped portion and the side end surface of the first plate-shaped portion, A second side surface extending in the one direction from the second curved portion is configured by a main surface of the second plate-shaped portion, The decorative sheet attachment method according to any one of [1] to [7], wherein the second curved portion is formed between the main surface of the second plate-shaped portion and the side end surface of the second plate-shaped portion.

[0020] [9] The jig includes a third plate-shaped portion connected to the first plate-shaped portion and the second plate-shaped portion, The third plate-shaped portion includes a main surface connected to the side end surface of the first plate-shaped portion that forms the support surface and the side end surface of the second plate-shaped portion that forms the support surface.

[0021]

[10] In the first plate-shaped portion, an end portion remote from the second plate-shaped portion is chamfered, and an end portion of the side end surface remote from the second plate-shaped portion is curved, The decorative sheet attachment method of [8] or [9], wherein the end of the second plate-shaped portion away from the first plate-shaped portion is chamfered, and the end of the side end face away from the first plate-shaped portion is curved.

[0022]

[11] The decorative sheet attachment method according to any one of [1] to

[10] , wherein in the forming step, the decorative sheet is preformed under atmospheric pressure.

[0023]

[12] The decorative sheet attachment method according to any one of [1] to

[11] , wherein the adherend is an exterior member of an automobile.

[0024]

[13] A molding step of preforming a decorative sheet using a jig; The jig includes a first bent portion and a second bent portion extending in a direction non-parallel to a direction in which the first bent portion extends, The decorative sheet forming method includes, in the forming step, forming the decorative sheet by pulling the decorative sheet and bending it at the first bent portion and the second bent portion.

[0025]

[14] The decorative sheet molding method of

[13] , wherein in the molding step, the decorative sheet is molded to include a base portion extending on a base surface defined by the first curved portion and the second curved portion, a first side portion connected to the base portion on the first curved portion and bent relative to the base portion on the first curved portion, and a second side portion connected to the base portion on the second curved portion and bent relative to the base portion on the second curved portion.

[0026]

[15] A molding device for preforming a decorative sheet, The molding device includes a jig, the jig including a first bent portion and a second bent portion extending in a direction non-parallel to a direction in which the first bent portion extends; The forming device is a decorative sheet processing device that forms the decorative sheet by pulling it and bending it at the first bending portion and the second bending portion.

[0027]

[16] The decorative sheet processing device of

[15] , wherein the molding device molds the decorative sheet to include a base portion extending on a base surface defined by the first curved portion and the second curved portion, a first side portion connected to the base portion on the first curved portion and bent relative to the base portion on the first curved portion, and a second side portion connected to the base portion on the second curved portion and bent relative to the base portion on the second curved portion.

[0028]

[17] The decorative sheet processing apparatus according to

[15] or

[16] , further comprising an attachment device for attaching the preformed decorative sheet to an adherend.

[0029]

[18] A preforming tool for preforming a decorative sheet having a shape with a first edge, a second edge, and a corner located between the first edge and the second edge, A first curved portion and a second curved portion extending in a direction non-parallel to the direction in which the first curved portion extends, The first curved portion extends along the first edge of the decorative sheet, The second curved portion extends along the second edge of the decorative sheet.

[0030] Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings. In the drawings accompanying this specification, the scale and aspect ratios have been appropriately changed and exaggerated from those of the actual objects for the convenience of illustration and ease of understanding.

[0031] The terms "sheet," "film," and "plate" in this disclosure are not distinguished from one another solely on the basis of differences in name. For example, a "decorative sheet" is not distinguished from a member called a decorative film or a decorative plate in terms of name.

[0032] In some of the drawings, directions common to the drawings are indicated by arrows. In each direction, the tip of the arrow is the first side. In each direction, the side opposite the first side, i.e., the base of the arrow, is the second side. In some of the drawings, an arrow pointing from the front to the back of the paper in a direction perpendicular to the paper is indicated by an X in a circle, as shown in FIG. 2.

[0033] 1 to 8 are diagrams for explaining one embodiment. FIG. 1 is a perspective view showing a decorating mobile body 110. The decorating mobile body 110 includes a mobile body 100 and a decorating sheet 20 attached to the mobile body 100. The decorating sheet 20 is attached to an adherend AB included in the mobile body 100. The decorating sheet 20 and the adherend AB may form a decorating member 60. The decorating mobile body 110 may include the decorating member 60. The decorating mobile body 110 may include a plurality of decorating members 60.

[0034] The moving body 100 is a movable device or equipment. Examples of the moving body 100 include automobiles, motorcycles, bicycles, tricycles, trains, airplanes, ships, snowmobiles, industrial robots, drones, and the like. In the following, an embodiment will be described using an example in which the decorative sheet 20 is applied to an automobile 1, particularly a passenger car. In addition to passenger cars, examples of the automobile 1 include trucks, buses, taxis, ambulances, fire engines, police vehicles, and construction vehicles.

[0035] In the example shown in FIG. 1, the automobile 1 includes a plurality of exterior members 10. The exterior members 10 are members that form the outer surface of the automobile 1. The exterior members 10 form a part of the outer surface of a moving body 100. The automobile 1 includes a roof 11, a pillar 12, and a trunk lid 13 as the exterior members 10. The exterior members 10 may be an adherend AB. In the illustrated example, the adherend AB is the roof 11. That is, the decorative sheet 20 is attached to the roof 11. The decorative sheet 20 may be attached to an exterior member 10 other than the roof 11.

[0036] The exterior member 10 may be made of a metal such as aluminum or stainless steel. The exterior member 10 may be manufactured by processing a plate material. The exterior member 10 may be formed by various processing methods such as press processing. The formed exterior member 10 may have a three-dimensional shape.

[0037] In the example shown in Fig. 1, the roof 11 extends in the front-rear and left-right directions of the automobile 1. The roof 11 has a front edge portion and a rear edge portion which are edges in the front-rear direction, and a side edge portion which is an edge in the left-right direction. The front edge portion and the rear edge portion extend in the left-right direction. The side edge portion extends in the front-rear direction.

[0038] The "front-rear direction" used with respect to the automobile 1 and the exterior member 10 is based on the normal traveling direction of the automobile 1 on the driving surface. The "up-down direction" used with respect to the automobile 1 and the exterior member 10 means the direction perpendicular to the driving surface. The "left-right direction" used with respect to the automobile 1 and the exterior member 10 means the direction perpendicular to both the front-rear direction and the up-down direction. The "front" or "forward" used with respect to the automobile 1 and the exterior member 10 means the direction toward the traveling direction in the front-rear direction. The "rear" or "rearward" used with respect to the automobile 1 and the exterior member 10 means the direction opposite to the traveling direction in the front-rear direction.

[0039] In the examples shown in Fig. 1 and Fig. 3 to Fig. 6, the adherend AB is a member extending in a first direction D1 and a second direction D2 non-parallel to the first direction D1. In the illustrated example, the second direction D2 is a direction perpendicular to the first direction D1. The first direction D1 is a direction parallel to the front-rear direction of the automobile 1. The second direction D2 is a direction parallel to the left-right direction of the automobile 1. The adherend AB includes a main adherend portion AB0, and a first side adherend portion AB1 and a second side adherend portion AB2 connected to the main adherend portion AB0. The first side adherend portion AB1 extends along the first direction D1 in a third direction D3 perpendicular to both the first direction D1 and the second direction D2. The third direction D3 is a direction parallel to the up-down direction of the automobile 1. The second side adherend portion AB2 extends along the second direction D2 in the third direction D3. The first side attachment portion AB1 and the second side attachment portion AB2 may be connected to each other.

[0040] As shown in FIG. 3, main adhesion portion AB0 may be rounded at a portion where it connects to first side adhesion portion AB1. Main adhesion portion AB0 may be rounded at a portion where it connects to second side adhesion portion AB2. First side adhesion portion AB1 may be rounded at a portion where it connects to main adhesion portion AB0. First side adhesion portion AB1 may be rounded at a portion where it connects to second side adhesion portion AB2. Second side adhesion portion AB2 may be rounded at a portion where it connects to main adhesion portion AB0. Second side adhesion portion AB2 may be rounded at a portion where it connects to first side adhesion portion AB1.

[0041] 3, the adherend AB includes a corner ABR formed by a main adherend portion AB0, a first adherend portion AB1, and a second adherend portion AB2. The adherend AB forms a convex portion at the corner ABR.

[0042] The decorative sheet 20 displays a design on an object to which the decorative sheet 20 is applied. In the example shown in FIG. 1, the decorative sheet 20 improves the design of the moving body 100. The decorative sheet 20 partially covers the moving body 100. The decorative sheet 20 may display a design such as a color or a geometric pattern. The decorative sheet 20 may display a metallic or leather-like texture. The decorative sheet 20 may have a matte texture.

[0043] 1, the decorative sheet 20 has four corners 20R. The decorative sheet 20 has a first edge 21 and a second edge 22 connected to the first edge 21. The first edge 21 and the second edge 22 form one corner 20R of the decorative sheet 20 at a portion where they are connected to each other.

[0044] The decorative sheet 20 has a first surface 20a and a second surface 20b opposite to the first surface 20a. In the example shown in Fig. 2, the decorative sheet 20 is attached to an adherend AB from the first surface 20a. The decorative sheet 20 can be observed from the second surface 20b. The decorative sheet 20 may have a thickness of 0.1 mm or more. The decorative sheet 20 may have a thickness of 0.5 mm or less.

[0045] 1, a preformed decorative sheet 20 is attached to an adherend AB. The decorative sheet 20 is attached to the adherend AB with a portion along a first edge 21 and a portion along a second edge 22 bent. The portion of the decorative sheet 20 along the first edge 21 is attached to a first-side attachment portion AB1. The portion of the decorative sheet 20 along the second edge 22 is attached to a second-side attachment portion AB2.

[0046] The decorative sheet 20 may include a portion that is not preformed. The decorative sheet 20 may not be preformed in a portion away from the corner 20R. In the illustrated example, the decorative sheet 20 is not preformed in a central portion of the roof 11.

[0047] In the example shown in FIG. 2, the decorative sheet 20 includes a thermoplastic resin layer 51. The thermoplastic resin layer 51 includes a thermoplastic resin. The thermoplastic resin included in the thermoplastic resin layer 51 may include one or more of acrylic, PET (polyethylene terephthalate), polyolefin resin such as polypropylene or polyethylene, polycarbonate, PVC (polyvinyl chloride), styrene, vinylidene chloride, thermoplastic urethane, and fluororesin. The thermoplastic resin layer 51 may be a film. The thermoplastic resin layer 51 may be a stretched film. The thermoplastic resin layer 51 may be a biaxially stretched film stretched in two directions that are not parallel to each other. The thermoplastic resin layer 51 may be colored. The colored thermoplastic resin layer 51 may display a design displayed by the decorative sheet 20. The thermoplastic resin layer 51 may have a thickness of 40 μm or more. The thermoplastic resin layer 51 may have a thickness of 300 μm or less.

[0048] The decorative sheet 20 may include layers other than the thermoplastic resin layer 51. In the example shown in Fig. 2, the decorative sheet 20 includes, from the first surface 20a to the second surface 20b, a bonding layer 52, a thermoplastic resin layer 51, a design layer 53, and a surface layer 54, in this order. In the illustrated decorative sheet 20, the bonding layer 52 forms the first surface 20a of the decorative sheet 20. In the illustrated decorative sheet 20, the surface layer 54 forms the second surface 20b of the decorative sheet 20.

[0049] In the example shown in FIG. 2, the bonding layer 52 is located between the thermoplastic resin layer 51 and the adherend AB. The bonding layer 52 improves the adhesion of the decorative sheet 20 to the adherend AB. The bonding layer 52 may include an adhesive or a pressure-sensitive adhesive. The adhesive contained in the bonding layer 52 may include one or more of an acrylic adhesive, a rubber adhesive, a urethane adhesive, and a silicone adhesive. The adhesive contained in the bonding layer 52 may include one or more of an acrylic adhesive, a rubber adhesive, a urethane adhesive, and a silicone adhesive. The bonding layer 52 may be omitted from the decorative sheet 20.

[0050] In the example shown in FIG. 2, the design layer 53 is located between the thermoplastic resin layer 51 and the surface layer 54. The design layer 53 displays the design displayed by the decorative sheet 20. The design displayed by the design layer 53 may include one or more images such as figures, patterns, designs, colors, pictures, photographs, characters, marks, pictograms, letters, and numbers. The design layer 53 may include a binder resin portion and a color material held by the binder resin portion. The binder resin portion may include a thermoplastic resin. The color material may be a dye, a pigment, or a combination of a dye and a pigment. The design layer 53 may be formed by printing. The design layer 53 may be formed by transfer. The design layer 53 may be omitted from the decorative sheet 20.

[0051] In the example shown in FIG. 2, the surface layer 54 forms the outer surface of the decorative sheet 20. The surface layer 54 may perform a function required for the outer surface of the decorative sheet 20. As an example, the surface layer 54 may be a hard coat layer having scratch resistance. The surface layer 54 may be an anti-stain layer that performs an anti-stain function. The surface layer 54 may be omitted from the decorative sheet 20.

[0052] The decorative sheet 20 having the above-mentioned configuration is attached to an adherend AB by an attachment method including a forming step of preforming the decorative sheet 20 using a jig 30 and an attachment step of attaching the preformed decorative sheet 20 to an adherend AB. Hereinafter, an example of a method of attaching the decorative sheet 20 shown in Fig. 1 and Fig. 2 to an adherend AB will be described mainly with reference to Fig. 3 to Fig. 8.

[0053] First, the decorative sheet 20 is placed on the adherend AB. In the example shown in FIG. 3, the decorative sheet 20 is placed on the main adherend portion AB0 of the adherend AB. The decorative sheet 20 may be positioned relative to the adherend AB. In the illustrated example, the decorative sheet 20 is positioned relative to the adherend AB such that the first edge 21 extends in the first direction D1 of the adherend AB. The decorative sheet 20 is positioned relative to the adherend AB such that the second edge 22 extends in the second direction D2 of the adherend AB. The decorative sheet 20 may be positioned relative to the adherend AB by being partially attached to the adherend AB. The decorative sheet 20 may be attached to the adherend AB in a portion that is not preformed.

[0054] Next, the decorative sheet 20 is preformed. In the examples shown in Fig. 4, Fig. 6 and Fig. 7, the decorative sheet 20 is preformed using a jig 30 and an operator's hand H. In the illustrated examples, the jig 30 is placed on the decorative sheet 20. In the portion where the jig 30 is placed, the decorative sheet 20 is located between the jig 30 and the adherend AB. Unlike the illustrated examples, the jig 30 may be placed between the decorative sheet 20 and the adherend AB.

[0055] In the example shown in FIG. 4 to FIG. 7, the jig 30 includes a first plate-shaped portion 31 extending in the X-direction DX and a second plate-shaped portion 32 connected to the first plate-shaped portion 31 and extending in the Y-direction DY non-parallel to the X-direction DX. In the illustrated example, the Y-direction DY is a direction perpendicular to the X-direction DX. The first plate-shaped portion 31 and the second plate-shaped portion 32 also extend in the Z-direction DZ perpendicular to both the X-direction DX and the Y-direction DY. In the X-direction DX, the Y-direction DY, and the Z-direction DZ, a side extending in a specific direction may be called a first side, and a side paired with the first side may be called a second side. The first plate-shaped portion 31 is connected to the second plate-shaped portion 32 at an end portion on the second side in the X-direction DX. The second plate-shaped portion 32 is connected to the first plate-shaped portion 31 at an end portion on the second side in the Y-direction DY.

[0056] In the example shown in FIG. 4 and FIG. 6, the jig 30 is placed on the adherend AB so that the first plate-shaped portion 31 extends in the first direction D1 of the adherend AB. The jig 30 is placed on the adherend AB so that the second plate-shaped portion 32 extends in the second direction D2 of the adherend AB. The jig 30 is placed on the decorative sheet 20 so that the first plate-shaped portion 31 is along the first edge 21 of the decorative sheet 20. The jig 30 is placed on the decorative sheet 20 so that the second plate-shaped portion 32 is along the second edge 22. In the example shown in FIG. 4 and FIG. 6, D1 and DX, D2 and DY, and D3 and DZ are approximately parallel to each other, but are not limited thereto. That is, D1 and DX may intersect, D2 and DY may intersect, or D3 and DZ may intersect. DX and DY may intersect at an acute angle or an obtuse angle.

[0057] In the example shown in Fig. 4 and Fig. 6, when the jig 30 is placed on the adherend AB, the first plate-shaped portion 31 approaches the corner ABR of the adherend AB at the end on the second side in the X-direction DX. When the jig 30 is placed on the adherend AB, the second plate-shaped portion 32 approaches the corner ABR of the adherend AB at the end on the second side in the Y-direction DY. When the jig 30 is placed on the decorative sheet 20, the first plate-shaped portion 31 approaches the corner 20R of the decorative sheet 20 at the end on the second side in the X-direction DX. When the jig 30 is placed on the decorative sheet 20, the second plate-shaped portion 32 approaches the corner 20R of the decorative sheet 20 at the end on the second side in the Y-direction DY.

[0058] In the example shown in FIG. 4, the first plate-shaped portion 31 includes a pair of main surfaces 31A and a side end surface 31B extending between the pair of main surfaces 31A. The pair of main surfaces 31A face a first side or a second side in the Y direction DY, respectively. The side end surface 31B includes a portion facing the first side in the Z direction DZ, a portion facing the first side in the X direction DX, and a portion facing the second side in the Z direction DZ. The portion of the side end surface 31B facing the first side in the Z direction DZ forms a top portion 34 of the first plate-shaped portion 31. The portion of the side end surface 31B facing the first side in the X direction DX forms a side portion 35 of the first plate-shaped portion 31. The portion of the side end surface 31B facing the second side in the Z direction DZ forms a bottom portion 36 of the first plate-shaped portion 31.

[0059] In the example shown in FIG. 4, the second plate-shaped portion 32 includes a pair of main surfaces 32A and a side end surface 32B extending between the pair of main surfaces 32A. The pair of main surfaces 32A face a first side or a second side in the X direction DX, respectively. The side end surface 32B includes a portion facing the first side in the Z direction DZ, a portion facing the first side in the Y direction DY, and a portion facing the second side in the Z direction DZ. The portion of the side end surface 32B facing the first side in the Z direction DZ forms a top portion 37 of the second plate-shaped portion 32. The portion of the side end surface 32B facing the first side in the Y direction DY forms a side portion 38 of the second plate-shaped portion 32. The portion of the side end surface 32B facing the second side in the Z direction DZ forms a bottom portion 39 of the second plate-shaped portion 32.

[0060] 4 and 5, the first plate-shaped portion 31 may include a chamfered portion. The second plate-shaped portion 32 may include a chamfered portion.

[0061] In the example shown in Fig. 4, the end of the first plate-shaped portion 31 remote from the second plate-shaped portion 32 is chamfered. The first plate-shaped portion 31 is chamfered at the side end surface 31B. The first plate-shaped portion 31 is curved at the end 36R of the bottom portion 36 remote from the second plate-shaped portion 32. The first plate-shaped portion 31 is rounded at the end 36R.

[0062] In the example shown in Fig. 4, the end of the second plate-shaped portion 32 remote from the first plate-shaped portion 31 is chamfered. The second plate-shaped portion 32 is chamfered at the side end surface 32B. The second plate-shaped portion 32 is curved at an end 39R of the bottom portion 39 remote from the first plate-shaped portion 31. The second plate-shaped portion 32 is rounded at the end 39R.

[0063] As shown in FIG. 5, a portion where the main surface 31A and the side end surface 31B of the first plate-shaped portion 31 are connected may be chamfered. The first plate-shaped portion 31 may include a curved surface 31C between the main surface 31A and the side end surface 31B by chamfering. In the illustrated example, the curved surface 31C is curved about an axis extending in the X-direction DX. As shown in FIG. 5, a portion where the main surface 32A and the side end surface 32B of the second plate-shaped portion 32 are connected may be chamfered. The second plate-shaped portion 32 may include a curved surface 32C between the main surface 32A and the side end surface 32B by chamfering. In the illustrated example, the curved surface 32C is curved about an axis extending in the Y-direction DY.

[0064] As shown in FIG. 5, the curved surface 31C may include a portion connected to the curved surface 32C. At the portion connected to the curved surface 32C, the curved surface 31C may bend about an axis extending in a direction non-parallel to the X-direction DX. That is, the curved surface 31C may include a portion having a three-dimensional shape. As shown in FIG. 5, the curved surface 32C may include a portion connected to the curved surface 31C. At the portion connected to the curved surface 31C, the curved surface 32C may bend about an axis extending in a direction non-parallel to the Y-direction DY. That is, the curved surface 32C may include a portion having a three-dimensional shape.

[0065] In the example shown in FIG. 4 to FIG. 6, the jig 30 has a first bending portion 41 and a second bending portion 42 extending in a direction non-parallel to the first bending portion 41. In the illustrated example, the first bending portion 41 extends in the X direction DX. The second bending portion 42 extends in the Y direction DY. The first bending portion 41 and the second bending portion 42 spread out in a planar shape. The first bending portion 41 is formed by the curved surface 31C of the first plate-shaped portion 31. That is, the first bending portion 41 is formed between the main surface 31A and the side end surface 31B. The second bending portion 42 is formed by the curved surface 32C of the second plate-shaped portion 32. That is, the second bending portion 42 is formed between the main surface 32A and the side end surface 32B. Unlike the illustrated example, the first bending portion 41 may extend linearly. Unlike the illustrated example, the second bending portion 42 may extend linearly.

[0066] In the example shown in FIG. 5, the first bending portion 41 has a first edge 41a and a second edge 41b. The first edge 41a and the second edge 41b include a portion extending in the X-direction DX. The first edge 41a is located on the first side in the X-direction DX from the second edge 41b. The second bending portion 42 has a first edge 42a and a second edge 42b. The first edge 42a and the second edge 42b include a portion extending in the Y-direction DY. As shown in FIG. 5, the first edge 41a of the first bending portion 41 and the first edge 42a of the second bending portion 42 may be connected to each other. The second edge 41b of the first bending portion 41 and the second edge 42b of the second bending portion 42 may be connected to each other.

[0067] The first curved portion 41 and the second curved portion 42 define a virtual base surface 40. In the example shown in Fig. 4 and Fig. 5, the base surface 40 is a plane extending in the X direction DX and the Y direction DY. An edge 40R of the base surface 40 extends in the X direction DX or the Y direction DY. In the example shown in Fig. 4, when the jig 30 is placed on the decorative sheet 20, the base surface 40 is located on the decorative sheet 20. Before preforming, the decorative sheet 20 faces the base surface 40 in the Z direction DZ.

[0068] The first curved portion 41 and the second curved portion 42 "define" the base surface 40 means that at least a portion of the first curved portion 41 forms the edge 40R of the base surface 40, and at least a portion of the second curved portion 42 forms the edge 40R of the base surface 40. The first curved portion 41 extending linearly may form the edge 40R of the base surface 40. The second curved portion 42 extending linearly may form the edge 40R of the base surface 40. The linear first curved portion 41 and the linear second curved portion 42 may be included in the base surface 40. In the example shown in FIG. 5, of the edges 41a and 41b of the first curved portion 41 extending in the X direction DX, the first edge 41a forms the edge 40R of the base surface 40. The first edge 41a of the first curved portion 41 may be included in the base surface 40. Of the edges 42a, 42b of the second curved portion 42 extending in the Y direction DY, the first edge 42a forms the edge 40R of the base surface 40. The first edge 41a of the second curved portion 42 may be included in the base surface 40.

[0069] The jig 30 may include a support surface 45 extending on the base surface 40. The jig 30 may directly or indirectly contact the decorative sheet 20 with the support surface 45 to define a surface on which the decorative sheet 20 extends. In the illustrated example, the jig 30 is disposed on the decorative sheet 20 so as to contact the decorative sheet 20 from the support surface 45. In the illustrated example, the support surface 45 includes a first support surface 451 included in the first plate-shaped portion 31 and a second support surface 452 included in the second plate-shaped portion 32. The first support surface 451 is formed by a portion of the side end surface 31B facing the second side in the Z direction DZ. The second support surface 452 is formed by a portion of the side end surface 32B facing the second side in the Z direction DZ. The first support surface 451 has two edges extending in the X direction DX. The second support surface 452 has two edges extending in the Y direction DY. The fixture 30 does not have to include the support surface 45 .

[0070] 4 and 6, the jig 30 has a first side surface 46 extending from the first curved portion 41 in the Z direction DZ, and a second side surface 47 extending from the second curved portion 42 in the Z direction DZ. The first side surface 46 is formed by one of the main surfaces 31A of the first plate-shaped portion 31. The second side surface 47 is formed by one of the main surfaces 32A of the second plate-shaped portion 32. The first side surface 46 is connected to the second side surface 47 at an end portion on the second side in the X direction DX. The second side surface 47 is connected to the first side surface 46 at an end portion on the second side in the Y direction DY.

[0071] As shown in FIGS. 4 to 7, the first side surface 46 may protrude at a portion connected to the first bending portion 41. In the illustrated example, the first side surface 46 includes a protruding portion 46C along the portion connected to the first bending portion 41. The protruding portion 46C protrudes toward the second side in the Y direction DY from the portion of the first side surface 46 other than the protruding portion 46C. The protruding portion 46C extends in the X direction DX. Similarly, the second side surface 47 may protrude at a portion connected to the second bending portion 42. In the illustrated example, the second side surface 47 includes a protruding portion 47C along the portion connected to the second bending portion 42. The protruding portion 47C protrudes toward the second side in the X direction DX from the portion of the second side surface 47 other than the protruding portion 47C. The protruding portion 47C extends in the Y direction DY.

[0072] From the state shown in FIG. 4, the decorative sheet 20 is pulled and bent at the first bent portion 41 and the second bent portion 42. As a result, the decorative sheet 20 is stretched three-dimensionally as shown in FIG. 6. The decorative sheet 20 is molded to include a base portion 25 located on the base surface 40, a first side portion 26 connected to the base portion 25 on the first bent portion 41, and a second side portion 27 connected to the base portion 25 on the second bent portion 42. The first side portion 26 is bent relative to the base portion 25 on the first bent portion 41. The second side portion 27 is bent relative to the base portion 25 on the second bent portion 42. In FIG. 7, the base portion 25 and the first side portion 26 of the molded decorative sheet 20 are shown together with the jig 30 (first plate-shaped portion 31) and the adherend AB. The first side portion 26 and the second side portion 27 may be connected to each other.

[0073] 6 and 7, the decorative sheet 20 is bent at a first curved portion 41 and a second curved portion 42 from a state facing the base surface 40. The decorative sheet 20 is bent from a first edge 41a of the first curved portion 41. The decorative sheet 20 is bent from a first edge 42a of the second curved portion 42. That is, the decorative sheet 20 is bent at the first curved portion 41 from the edge of the first curved portion 41 that forms the edge 40R of the base surface 40. The decorative sheet 20 is bent at the second curved portion 42 from the edge of the second curved portion 42 that forms the edge 40R of the base surface 40.

[0074] 6 and 7 , the decorative sheet 20 is bent at the first bending portion 41 and the second bending portion 42 while in contact with the support surface 45. The support surface 45 may support the decorative sheet 20 that is bent at the first bending portion 41 and the second bending portion 42. The decorative sheet 20 may be in contact with the support surface 45 at the base portion 25.

[0075] In the forming step, the decorative sheet 20 may be pulled after being bent at the first bending portion 41 and the second bending portion 42. For example, the decorative sheet 20 bent at the first bending portion 41 and the second bending portion 42 may be pulled together with the jig 30 so that the vicinity of the corner 20R of the decorative sheet 20 is most stretched. In addition, the decorative sheet 20 bent at the first bending portion 41 and the second bending portion 42 may be pulled together with the jig 30 so that the connection portion between the first side portion 26 and the second side portion 27 overlaps with the corner portion ABR of the adherend AB.

[0076] In the forming step, after the decorative sheet 20 is stretched, the decorative sheet 20 may be bent at the first bending portion 41 and the second bending portion 42. For example, in the forming step, the stretched decorative sheet 20 may be bent at the first bending portion 41 and the second bending portion 42.

[0077] In the molding step, the decorative sheet 20 may be stretched over a wider range than the range where it is attached to the adherend AB. The decorative sheet 20 stretched over a wider range may be shrunk in the bonding step described below.

[0078] In the forming step, the operation of pulling the decorative sheet 20 and the operation of bending the decorative sheet 20 at the first bending portion 41 and the second bending portion 42 may partially overlap in time.

[0079] As shown in Fig. 3, the decorative sheet 20 may be heated in a molding process. In the molding process, the heated decorative sheet 20 may be pulled and bent at the first bending portion 41 and the second bending portion 42. The decorative sheet 20 may be heated to a temperature between the glass transition point and the melting point of the resin contained in the thermoplastic resin layer 51 of the decorative sheet 20. The decorative sheet 20 may be heated by various heating devices 200 including a heat gun shown in Fig. 3. In the illustrated example, the decorative sheet 20 is heated from the first surface 20a side by hot air from the heat gun.

[0080] In the forming step, the decorative sheet 20 may be stretched after bending the decorative sheet 20 at the first bending portion 41 and the second bending portion 42. In this case, the decorative sheet 20 may be heated between the operation of bending the decorative sheet 20 and the operation of stretching the decorative sheet 20. The heating of the decorative sheet may partially overlap in time with the operation of bending the decorative sheet or the operation of stretching the decorative sheet 20.

[0081] In the example shown in Fig. 6 and Fig. 7, the base portion 25 has a certain thickness. The thickness direction DD of the base portion 25 is parallel to the direction in which the base surface 40 and the decorative sheet 20 face each other. In the state shown in Fig. 6 and Fig. 7, the base portion 25 is disposed on the main attachment portion AB0. The first side portion 26 extends along the first bent portion 41 of the jig 30. The first side portion 26 extends along the first edge 21 of the decorative sheet 20. The second side portion 27 extends along the second bent portion 42 of the jig 30. The second side portion 27 extends along the second edge 22 of the decorative sheet 20. In the molded decorative sheet 20, the first side portion 26 and the second side portion 27 are bent toward the first side in the thickness direction DD of the base portion 25 with respect to the base portion 25.

[0082] The first side portion 26 may have a shape corresponding to the shape of the first curved portion 41. The first side portion 26 may extend linearly. The first side portion 26 may expand in a planar shape. In the example shown in Figs. 6 to 8, the first side portion 26 has a curved shape. The first side portion 26 having a curved shape is curved about an axis extending in the first direction D1 when the decorative sheet 20 is positioned on the adherend AB.

[0083] The second side portion 27 may have a shape corresponding to the shape of the second curved portion 42. The second side portion 27 may extend linearly. The second side portion 27 may expand in a planar shape. In the example shown in Figs. 6 to 8, the second side portion 27 has a curved shape. The curved second side portion 27 is curved about an axis extending in the second direction D2 when the decorative sheet 20 is positioned on the adherend AB.

[0084] As shown in FIG. 6 and FIG. 7, the molded decorative sheet 20 may include a first extension portion 28 extending from the first side portion 26. The molded decorative sheet 20 may include a second extension portion 29 extending from the second side portion 27. The first extension portion 28, the second extension portion 29, and the base portion 25 may form a convex portion 20P of the decorative sheet 20. The first extension portion 28 extends from the first side portion 26 in the thickness direction DD of the base portion 25. The first extension portion 28 is bent toward the first side in the thickness direction DD of the base portion 25 with respect to the base portion 25. The first extension portion 28 extends between the first side portion 26 and the first edge 21. The second extension portion 29 extends from the second side portion 27 in the thickness direction DD of the base portion 25. The second extension portion 29 is bent toward the first side in the thickness direction DD of the base portion 25 with respect to the base portion 25. The second extending portion 29 extends between the second side portion 27 and the second edge 22. The decorative sheet 20 may face a first side surface 46 of the jig 30 at the first extending portion 28. The decorative sheet 20 may face a second side surface 47 of the jig 30 at the second extending portion 29.

[0085] As shown in Figs. 6 and 7, the decorative sheet 20 may be preformed such that the first extending portion 28 extends at a portion connected to the first side portion 26, and the second extending portion 29 extends at a portion connected to the second side portion 27. The first extending portion 28 includes a protruding portion 28C at a portion connected to the first side portion 26. In the state shown in Figs. 6 and 7, the protruding portion 28C protrudes toward the second side in the second direction D2 beyond the portion of the first extending portion 28 other than the protruding portion 28C. Similarly, the second extending portion 29 includes a protruding portion 29C at a portion connected to the second side portion 27. In the state shown in Fig. 6, the protruding portion 29C protrudes toward the second side in the first direction D1 beyond the portion of the second extending portion 29 other than the protruding portion 29C.

[0086] The protrusion 28C of the first extending portion 28 may be formed by pressing the first extending portion 28 against the protrusion 46C of the first side surface 46. The protrusion 29C of the second extending portion 29 may be formed by pressing the second extending portion 29 against the protrusion 47C of the second side surface 47.

[0087] 6 and 7, the first extending portion 28 and the second extending portion 29 may include portions bent at an acute angle with respect to the base portion 25. In the example shown in Fig. 6, the first extending portion 28 is bent at a protruding portion 28C with respect to the base portion 25 at an acute angle. The second extending portion 29 is bent at a protruding portion 29C with respect to the base portion 25 at an acute angle. The protruding portion 28C of the first extending portion 28, the protruding portion 29C of the second extending portion 29, and the base portion 25 may form a convex portion 20P of the decorative sheet 20.

[0088] In the manner described above, the decorative sheet 20 is preformed using the jig 30. The decorative sheet 20 may be preformed under atmospheric pressure. By preforming the decorative sheet 20 under atmospheric pressure, the decorative sheet 20 can be formed inexpensively without using a forming machine such as a vacuum forming machine.

[0089] Next, the preformed decorative sheet 20 is attached to the adherend AB. The attaching step includes a disposing step of disposing the preformed decorative sheet 20 on the adherend AB, and a joining step of joining the arranged decorative sheet 20 to the adherend AB.

[0090] 8 shows the decorative sheet 20 arranged on the adherend AB by the arrangement step. In the decorative sheet 20, the base portion 25 is located on the main adhesion portion AB0. The first side portion 26 faces the first side adhesion portion AB1. The second side portion 27 faces the second side adhesion portion AB2. The first extension portion 28 connected to the first side portion 26 faces the first side adhesion portion AB1. The second extension portion 29 connected to the second side portion 27 faces the second side adhesion portion AB2.

[0091] 8, the first side portion 26 and the second side portion 27 are bent from the base portion 25 to the second side in the thickness direction DD of the base portion 25. That is, the first side portion 26 and the second side portion 27 are bent in the opposite direction to the molding process in the arrangement process. The first side portion 26 and the second side portion 27 may be bent in the opposite direction to the molding process by an operator's hand H. The first side portion 26 and the second side portion 27 may be bent in the opposite direction to the molding process by a jig that is movable relatively to the decorative sheet 20 and the adherend AB.

[0092] The decorative sheet 20 placed on the adherend AB is joined to the adherend AB in the joining step. The decorative sheet 20 may be joined to the adherend AB by being pressed against the adherend AB. The decorative sheet 20 may be pressed against the adherend AB by an operator's hand. Fig. 8 shows the decorative sheet 20 being pressed by an operator's hand H at a portion overlapping the first-side adherend portion AB1.

[0093] In the bonding step, the decorative sheet 20 may be bonded to the adherend AB while shrinking the decorative sheet 20. In the bonding step, the portion of the decorative sheet 20 that has stretched relative to the adherend AB may be shrunk. In the bonding step, the portion of the decorative sheet 20 that overlaps the first side attachment portion AB1 may be shrunk. In the bonding step, the portion of the decorative sheet 20 that overlaps the second side attachment portion AB2 may be shrunk. The shrunk decorative sheet 20 may be bonded to the first side attachment portion AB1. The shrunk decorative sheet 20 may be bonded to the second side attachment portion AB2.

[0094] In the bonding process, the decorative sheet 20 may be heated to cause the decorative sheet 20 to shrink. The decorative sheet 20 may be heated by various heating devices 200 including a heat gun as shown in Fig. 8. Fig. 8 shows the decorative sheet 20 being pressed by the heating device 200 at the portion overlapping the second-side attachment portion AB2.

[0095] In this manner, the decorative sheet 20 is attached to the adherend AB. In the case of a decorative sheet that partially covers a moving body, the decorative sheet is attached across multiple adherend surfaces of an adherend having a three-dimensional shape. The decorative sheet is attached to an adherend having a three-dimensional shape including corners. In order for the decorative sheet to exhibit excellent design properties, it is preferable to attach the entire decorative sheet to such an adherend.

[0096] However, the decorative sheet attached to such an adherend is prone to wrinkles and sagging because it cannot follow the shape of the adherend. In addition, by stretching the decorative sheet in a plane, i.e., by stretching the decorative sheet on the surface on which the decorative sheet spreads, a wide range of surplus parts that cannot be attached to the adherend are generated, which is prone to wrinkles and sagging. The wrinkles and sagging of the decorative sheet can be observed from the outside, which can cause deterioration of the design displayed by the decorative sheet.

[0097] In contrast, the above-mentioned method for attaching a decorative sheet includes a forming step of preforming the decorative sheet 20 using a jig 30, and an attaching step of attaching the preformed decorative sheet 20 to an adherend AB. The jig 30 includes a first bent portion 41 and a second bent portion 42 extending in a direction non-parallel to the direction in which the first bent portion 41 extends. In the forming step, the decorative sheet 20 is pulled and bent at the first bent portion 41 and the second bent portion 42 to form the decorative sheet 20 so as to include a base portion 25 located on a base surface 40 defined by the first bent portion 41 and the second bent portion 42, a first side portion 26 connected to the base portion 25 on the first bent portion 41 and bent relative to the base portion 25 on the first bent portion 41, and a second side portion 27 connected to the base portion 25 on the second bent portion 42 and bent relative to the base portion 25 on the second bent portion 42. The adherend AB includes a main adhesion portion AB0, a first side adhesion portion AB1 connected to the main adhesion portion AB0 and extending along a first direction D1, and a second side adhesion portion AB2 connected to the main adhesion portion AB0 and extending along a second direction D2 non-parallel to the first direction D1. The attachment step includes an arrangement step of arranging the decorative sheet 20 on the adherend AB so that the base portion 25 is located on the main adhesion portion AB0, the first side portion 26 faces the first side adhesion portion AB1, and the second side portion 27 faces the second side adhesion portion AB2, and a joining step of joining the decorative sheet 20 to the adherend AB.

[0098] According to this specific example, the preformed decorative sheet 20 has a three-dimensional shape formed by a base portion 25, a first side portion 26, and a second side portion 27, as shown in FIG. 7. The decorative sheet 20 can be preformed to have a three-dimensional shape corresponding to the shape of the adherend AB by a molding process using a jig 30. This preformation allows the shape of the decorative sheet 20 to follow the shape of the adherend AB. In addition, excessive planar stretching of the decorative sheet 20 can be suppressed. This makes it possible to suppress the occurrence of wrinkles and sagging in the decorative sheet 20 attached to the adherend AB. Therefore, according to this specific example, the design of the decorative sheet 20 attached to the adherend AB having a three-dimensional shape can be improved.

[0099] In the above-mentioned method for attaching the decorative sheet 20, in the joining step, the heated decorative sheet 20 is bent at the first bent portion 41 and the second bent portion 42. According to this specific example, by softening the decorative sheet 20, the decorative sheet 20 can be easily bent at the first bent portion 41 and the second bent portion 42. This allows the shape of the decorative sheet 20 to easily follow the shape of the adherend AB.

[0100] In the above-mentioned method for attaching the decorative sheet 20, in the bonding step, the decorative sheet 20 is bonded to the adherend AB while shrinking the decorative sheet 20. According to this specific example, bonding of the decorative sheet 20 to the adherend AB in a sagging or wrinkled state can be prevented. This allows the shape of the decorative sheet 20 to easily follow the shape of the adherend AB.

[0101] In particular, in the above-mentioned method for attaching the decorative sheet 20, the decorative sheet 20 is shrunk by heating the decorative sheet 20. According to this specific example, the decorative sheet 20 can be quickly shrunk by softening the decorative sheet 20. This allows the decorative sheet 20 to be efficiently attached to the adherend AB.

[0102] In the above-mentioned method for attaching the decorative sheet 20, the first side 26 and the second side 27 of the preformed decorative sheet 20 are bent toward the first side in the thickness direction DD of the base 25 with respect to the base 25. On the other hand, the first side 26 and the second side 27 of the decorative sheet 20 arranged on the adherend AB are bent toward the second side in the thickness direction DD of the base 25 with respect to the base 25. That is, the first side 26 and the second side 27 are bent in the attachment step toward the opposite side to the molding step. According to this specific example, the preformed decorative sheet 20 extends from the first side 26 in a direction away from the first side attachment portion AB1 as shown in FIG. 6 and FIG. 7. The preformed decorative sheet 20 extends from the second side 27 in a direction away from the second side attachment portion AB2 as shown in FIG. 6. This makes it possible to prevent the decorative sheet 20 from being unintentionally joined to the first attachment portion AB1 or the second attachment portion AB2 in steps other than the attachment step, and therefore the decorative sheet 20 can be stably attached to the adherend AB.

[0103] In the above-mentioned method for attaching the decorative sheet 20, the preformed decorative sheet 20 includes a first extending portion 28 extending from the first side portion 26 and a second extending portion 29 extending from the second side portion 27. In the preformed decorative sheet 20, the first extending portion 28 protrudes at a portion where it is connected to the first side portion 26, and the second extending portion 29 protrudes at a portion where it is connected to the second side portion 27. According to this specific example, even if the three-dimensional shape of the decorative sheet 20 after preformation returns to a certain extent to the planar shape before preformation, the decorative sheet 20 can be easily attached to the adherend AB. That is, in the arranging step, the first side portion 26 and the first extending portion 28 can be easily arranged on the first side attachment portion AB1, and the second side portion 27 and the second extending portion 29 can be easily arranged on the second side attachment portion AB2.

[0104] In the above-mentioned method for attaching the decorative sheet 20, the jig 30 includes a first plate-shaped portion 31 and a second plate-shaped portion 32 that are connected to each other. The jig 30 includes a support surface 45 that spreads on the base surface 40. The support surface 45 is formed by the side end surface 31B of the first plate-shaped portion 31 and the side end surface 32B of the second plate-shaped portion 32. A first side surface 46 of the jig 30 is formed by the main surface 31A of the first plate-shaped portion 31. A first curved portion 41 is formed between the main surface 31A and the side end surface 31B. A second side surface 47 of the jig 30 is formed by the main surface 32A of the second plate-shaped portion 32. A second curved portion 42 is formed between the main surface 32A and the side end surface 32B.

[0105] According to this specific example, the decorative sheet 20 can be easily preformed by holding the decorative sheet 20 and the jig 30 as shown in FIG. 6. In the illustrated example, the decorative sheet 20 is bent on the first bent portion 41 with one hand. The decorative sheet 20 is bent on the second bent portion 42 with the other hand. The decorative sheet 20 and the main surface 31A of the first plate-shaped portion 31 that does not form the first side surface 46 are held with one hand. The decorative sheet 20 and the main surface 32A of the second plate-shaped portion 32 that does not form the second side surface 47 are held with the other hand. From the state in which the decorative sheet 20 and the jig 30 are held, the decorative sheet 20 can be easily preformed by bending the decorative sheet 20 toward the first side surface 46 and the second side surface 47 as shown in FIG. 6.

[0106] In the above-mentioned method for attaching the decorative sheet 20, the first plate-shaped portion 31 of the jig 30 is chamfered at an end portion remote from the second plate-shaped portion 32. The first plate-shaped portion 31 is chamfered at a side end surface 31B. The first plate-shaped portion 31 is bent at an end portion 36R of the bottom portion 36 remote from the second plate-shaped portion 32. The second plate-shaped portion 32 of the jig 30 is chamfered at an end portion remote from the first plate-shaped portion 31. The second plate-shaped portion 32 is chamfered at a side end surface 32B. The second plate-shaped portion 32 is bent at an end portion 39R of the bottom portion 39 remote from the first plate-shaped portion 31. According to this specific example, it is possible to prevent the jig 30 from coming into contact with the decorative sheet 20 at the corner. This makes it possible to protect the decorative sheet 20 even when the jig 30 is placed on the decorative sheet 20.

[0107] In the embodiment described above, the method for attaching the decorative sheet includes a forming step of preforming the decorative sheet 20 using the jig 30, and an attaching step of attaching the preformed decorative sheet 20 to the adherend AB. The jig 30 includes a first bent portion 41 and a second bent portion 42 extending in a direction non-parallel to the direction in which the first bent portion 41 extends. In the forming step, the decorative sheet 20 is pulled and bent at the first bent portion 41 and the second bent portion 42 to form the decorative sheet 20 so as to include a base portion 25 located on a base surface 40 defined by the first bent portion 41 and the second bent portion 42, a first side portion 26 connected to the base portion 25 on the first bent portion 41 and bent relative to the base portion 25 on the first bent portion 41, and a second side portion 27 connected to the base portion 25 on the second bent portion 42 and bent relative to the base portion 25 on the second bent portion 42. The adherend AB includes a main adhesion portion AB0, a first side adhesion portion AB1 connected to the main adhesion portion AB0 and extending along a first direction D1, and a second side adhesion portion AB2 connected to the main adhesion portion AB0 and extending along a second direction D2 non-parallel to the first direction D1. The attachment step includes an arrangement step of arranging the decorative sheet 20 on the adherend AB so that the base portion 25 is located on the main adhesion portion AB0, the first side portion 26 faces the first side adhesion portion AB1, and the second side portion 27 faces the second side adhesion portion AB2, and a joining step of joining the decorative sheet 20 to the adherend AB.

[0108] According to this embodiment, the decorative sheet 20 can be three-dimensionally shaped to fit the shape of the adherend AB by bending the decorative sheet 20 at the first bending portion 41 and the second bending portion 42 of the jig 30. This makes it possible to prevent the decorative sheet 20 from being excessively stretched, and to make the decorative sheet 20 conform to the shape of the adherend AB. This makes it possible to prevent sagging or wrinkles in the decorative sheet 20 attached to the adherend AB. As a result, it is possible to improve the design of the decorative sheet 20 attached to the adherend AB having a three-dimensional shape.

[0109] In the embodiment described above, the method for forming the decorative sheet 20 includes a forming step of preforming the decorative sheet 20 using a jig 30. The jig 30 includes a first bending portion 41 and a second bending portion 42 extending in a direction non-parallel to the direction in which the first bending portion 41 extends. In the forming step, the decorative sheet 20 is pulled and bent at the first bending portion 41 and the second bending portion 42 to form the decorative sheet 20. According to this embodiment, the decorative sheet 20 can be easily formed three-dimensionally using a simple tool. This allows a stable supply of the decorative sheet 20 that can improve the design when attached to the adherend AB having a three-dimensional shape.

[0110] Although one embodiment has been described with reference to a specific example, the above-mentioned specific example does not limit the embodiment. The above-mentioned embodiment can be embodied in various other specific examples, and various omissions, substitutions, changes, additions, etc. can be made without departing from the spirit of the embodiment.

[0111] An example of the modification will be described below with reference to the drawings. In the following description and the drawings used in the following description, parts that can be configured similarly to the above-mentioned specific example are designated by the same reference numerals as those used for the corresponding parts in the above-mentioned specific example, and duplicated descriptions will be omitted.

[0112] As shown in FIG. 9, the jig 30 may include a first edge contact portion 48 extending from the first side surface 46 and contacting the edge of the decorative sheet 20, and a second edge contact portion 49 extending from the second side surface 47 and contacting the edge of the decorative sheet 20. In the illustrated example, the decorative sheet 20 contacts the first edge contact portion 48 at the first edge 21. The decorative sheet 20 contacts the second edge contact portion 49 at the second edge 22. By contacting the edge of the decorative sheet 20 with the first edge contact portion 48, the length of the decorative sheet 20 extending from the first side portion 26 along the first side surface 46 to the edge of the decorative sheet 20 can be made uniform. By contacting the edge of the decorative sheet 20 with the second edge contact portion 49, the length of the decorative sheet 20 extending from the second side portion 27 along the second side surface 47 to the edge of the decorative sheet 20 can be made uniform. This makes it possible to stabilize the shape of the decorative sheet 20 after preforming.

[0113] 9, the first edge contact portion 48 includes a first protruding portion 481 protruding from a main surface 31A forming the first side surface 46 of the first plate-shaped portion 31 to a second side in the Y direction DY, and a second protruding portion 482 protruding from an end portion of the first protruding portion 481 to the second side in the Z direction DZ. The decorative sheet 20 contacts the first protruding portion 481 from the second side in the Z direction DZ at the first extending portion 28.

[0114] The second edge contact portion 49 includes a first protruding portion 491 protruding from the main surface 32A forming the second side surface 47 of the second plate-shaped portion 32 to a second side in the X direction DX, and a second protruding portion 492 protruding from an end of the first protruding portion 491 to the second side in the Z direction DZ. The decorative sheet 20 contacts the first protruding portion 491 at the second extending portion 29 from the second side in the Z direction DZ.

[0115] As another example of the jig 30, the jig 30 may include a third plate-shaped portion 33 connected to both the first plate-shaped portion 31 and the second plate-shaped portion 32 as shown in FIG. 10. The third plate-shaped portion 33 extends between a first main surface 31A of the first plate-shaped portion 31 in the Y direction DY and a first main surface 32A of the second plate-shaped portion 32 in the X direction DX. The third plate-shaped portion 33 extends between a first support surface 451 and a second support surface 452. The third plate-shaped portion 33 includes a main surface 33A connected to a side end surface 31B of the first plate-shaped portion 31 that forms the first support surface 451 and a side end surface 32B of the second plate-shaped portion 32 that forms the second support surface 452. The main surface 33A may be flush with these side end surfaces 31B, 32B. According to this specific example, it is possible to prevent the fingers gripping the first plate-shaped portion 31 and the second plate-shaped portion 32 from reaching the decorative sheet 20 and coming into contact with the decorative sheet 20. This makes it possible to prevent the decorative sheet 20 from being damaged during the molding process.

[0116] In one specific example of the above-mentioned method for attaching the decorative sheet 20, the decorative sheet 20 is preformed on the adherend AB. The decorative sheet 20 is preformed in a state where a part of the decorative sheet 20 is attached to the adherend AB. However, the present invention is not limited to this, and the decorative sheet 20 may be preformed at a location other than on the adherend AB. The preformed decorative sheet 20 may be brought onto the adherend AB.

[0117] In one specific example of the above-mentioned method of attaching the decorative sheet 20, the decorative sheet 20 is bent at the first bending portion 41 and the second bending portion 42 from a state facing the base surface 40. The decorative sheet 20 is bent at the first bending portion 41 and the second bending portion 42 without moving the jig 30. This is not limited to the above, and the decorative sheet 20 may be bent at the first bending portion 41 and the second bending portion 42 in a state where the decorative sheet 20 does not face the base surface 40. The decorative sheet 20 may be bent at the first bending portion 41 and the second bending portion 42 by moving the jig 30 together with the decorative sheet 20. In the illustrated jig 30, the decorative sheet 20 may be bent at the first bending portion 41 and the second bending portion 42 in a state where the first side surfaces 46 and 47 are in contact with the decorative sheet 20. The decorative sheet 20 bent at the first bending portion 41 and the second bending portion 42 may include a portion facing the base surface 40. By arranging the decorative sheet 20 in this manner, it is possible to expand the area where the decorative sheet 20 and the jig 30 contact each other. This makes it possible to suppress unintended movement of the decorative sheet 20 relative to the jig 30 when bending the decorative sheet 20 at the first bending portion 41 and the second bending portion 42. Therefore, the decorative sheet 20 can be stably preformed using the jig 30.

[0118] In one specific example of the method for attaching the decorative sheet 20 described above, the jig 30 includes the first plate-shaped portion 31 and the second plate-shaped portion 32 connected to the first plate-shaped portion 31. However, the jig 30 may include a first rod-shaped portion 61 and a second rod-shaped portion 62 connected to the first rod-shaped portion 61, as shown in FIG. 11. In the illustrated example, the first rod-shaped portion 61 extends in the X direction DX. The second rod-shaped portion 62 extends in the Y direction DY. The first rod-shaped portion 61 is connected to the second rod-shaped portion 62 at an end portion on the second side in the X direction DX. The second rod-shaped portion 62 is connected to the first rod-shaped portion 61 at an end portion on the second side in the Y direction DY.

[0119] 11, the first rod-shaped portion 61 has a shape of a revolution centered on an axis extending in the X-direction DX. The first curved portion 41 is formed by a part of a curved surface 61R centered on the axis extending in the X-direction DX of the first rod-shaped portion 61. The second rod-shaped portion 62 has a shape of a revolution centered on an axis extending in the Y-direction DY. The second curved portion 42 is formed by a part of a curved surface 62R centered on the axis extending in the Y-direction DY of the second rod-shaped portion 62.

[0120] 11, the first edge 41a of the first bending portion 41 is formed by the generatrix located on the second side in the Z direction DZ among the generatrix forming the curved surface 61R. The second edge 41b of the first bending portion 41 is formed by the generatrix located on the second side in the Y direction DY among the generatrix forming the curved surface 61R.

[0121] 11, the first edge 42a of the second bending portion 42 is formed by the generatrix located on the second side in the Z direction DZ among the generatrix forming the curved surface 62R. The second edge 42b of the second bending portion 42 is formed by the generatrix located on the second side in the X direction DX among the generatrix forming the curved surface 62R.

[0122] Unlike the example shown in Fig. 11, the first rod-shaped portion 61 and the second rod-shaped portion 62 do not have to have a solid of revolution shape. The cross-sectional shape of the first rod-shaped portion 61 and the cross-sectional shape of the second rod-shaped portion 62 may be a triangular shape, a rectangular shape, or a shape that combines these shapes with a solid of revolution shape.

[0123] In one specific example of the above-mentioned method for attaching the decorative sheet 20, the decorative sheet 20 is preformed using the jig 30 and the hand H of the worker. However, the present invention is not limited to this, and the decorative sheet 20 may be preformed by a processing device 400 as shown in Fig. 12 and Fig. 13. In the illustrated example, the processing device 400 includes a forming device 500 that preforms the decorative sheet 20. Fig. 12 shows an adherend AB, the decorative sheet 20 positioned on the adherend AB before attachment, and the forming device 500.

[0124] The molding apparatus 500 shown in FIG. 12 and FIG. 13 includes a jig 30. The molding apparatus 500 includes a first jig 301 and a second jig 302 facing the first jig 301 as the jig 30. Of the first jig 301 and the second jig 302, the first jig 301 includes a first bending portion 41 and a second bending portion 42. The first jig 301 includes a support surface 45 located on the base surface 40 defined by the first bending portion 41 and the second bending portion 42. In the illustrated example, the first bending portion 41 and the second bending portion 42 extend linearly. The first bending portion 41 and the second bending portion 42 are included in the edge 40R of the base surface 40. The first jig 301 includes a first side surface 46 extending from the first bending portion 41 and a second side surface 47 extending from the second bending portion 42. The second jig 302 includes a first surface 302a facing the first side surface 46 and a second surface 302b facing the second side surface 47.

[0125] The decorative sheet 20 may be fixed to the first jig 301 and the second jig 302 by being sandwiched between the two jigs 301, 302. In the example shown in Fig. 13, the decorative sheet 20 is sandwiched between the first side surface 46 of the first jig 301 and the first surface 302a of the second jig 302. The decorative sheet 20 is also sandwiched between the second side surface 47 of the first jig 301 and the second surface 302b of the second jig 302. By being sandwiched in this manner, the jig 30 is placed on the decorative sheet 20 by contacting the decorative sheet 20 from the first side surface 46 and the second side surface 47, as shown in Fig. 14.

[0126] The molding device 500 may bend the decorative sheet 20 at the first bending portion 41 and the second bending portion 42 by moving the jig 30 together with the decorative sheet 20. As shown in Figs. 12 and 13, the molding device 500 may include a driving device 710 that moves the jig 30. The first jig 301 and the second jig 302 are attached to the driving device 710 via arms 720 extending from the driving device 710. The first jig 301 may approach the decorative sheet 20 from below by the driving device 710. The second jig 302 may approach the decorative sheet 20 from above by the driving device 710. By moving the first jig 301 and the second jig 302 in this manner, the decorative sheet 20 may be sandwiched between the first jig 301 and the second jig 302 as shown in Fig. 14. The driving device 710 may be an air cylinder.

[0127] 12, the arm 720 may include a plurality of small arms 721 and a link 725 connecting adjacent small arms 721 to each other. The first jig 301 and the second jig 302 may be connected to the driving device 710 via such an arm 720, so that the molding device 500 may rotate the first jig 301 and the second jig 302 relative to the adherend AB. The molding device 500 may bend the decorative sheet 20 at the first bending portion 41 and the second bending portion 42 by rotating the first jig 301 and the second jig 302. The molding device 500 may pull the decorative sheet 20 in a state in which the decorative sheet 20 is bent at the first bending portion 41 and the second bending portion 42. By bending the decorative sheet 20 at the first bent portion 41 and the second bent portion 42 of the jig 30, the molding device 500 molds the decorative sheet 20 to include a base portion 25, a first side portion 26, and a second side portion 27, as shown in Fig. 14. When the molding device 500 rotates relative to the decorative sheet 20, the first jig 301 may contact the decorative sheet 20 at the support surface 45.

[0128] In the above-described method of attaching the decorative sheet 20, the preformed decorative sheet 20 is attached to the adherend AB by the hand H of an operator. However, the present invention is not limited to this, and the decorative sheet 20 may be attached to the adherend AB by an attachment device 600 as shown in FIG. 15. The attachment device 600 includes a joining device 601 that joins the preformed decorative sheet 20 to the adherend AB. In the illustrated example, the joining device 601 is a roller. However, the present invention is not limited to the illustrated example, and the joining device 601 may be a sponge.

[0129] As shown in FIG. 12, the bonding device 600 may include the driving device 710 and the arm 720 described above. The joining device 601 may be attached to the driving device 710 via the arm 720. The joining device 601 may be movable relative to the decorative sheet 20 and the adherend AB. The joining device 601 may be movable relative to the decorative sheet 20 and the adherend AB. The joining device 601 may join a portion of the decorative sheet 20 facing the main adhesion portion AB0. The joining device 601 may join a portion of the decorative sheet 20 facing the first side adhesion portion AB1. The joining device 602 may join a portion of the decorative sheet 20 facing the second side adhesion portion AB2.

[0130] As shown in Fig. 12, the processing device 400 may include the heating device 200 described above. The decorative sheet 20 heated by the heating device 200 may be preformed by a molding device 500. The molding device 500 may bend the decorative sheet 20 heated by the heating device 200 at the first bending portion 41 and the second bending portion 42. The heating device 200 may heat the decorative sheet 20 arranged on the adherend AB. The decorative sheet 20 on the adherend AB may shrink due to being heated by the heating device 200. In the illustrated example, the heating device 200 is a heater.

[0131] The heating device 200 may be attached to the driving device 710 described above via the arm 720 described above. The heating device 200, the arm 720, and the driving device 710 may constitute a heating device 800. In the heating device 800, the heating device 200 may be movable relative to the decorative sheet 20 and the adherend AB. [Explanation of symbols]

[0132] 1: automobile, 10: exterior member, 20: decorative sheet, 25: base portion, 26: first side portion, 27: second side portion, 30: jig, 31: first plate-shaped portion, 32: second plate-shaped portion, 40: base surface, 40R: edge portion, 41: first curved portion 41, 42: second curved portion, 45: support surface, 46: first side surface, 47: second side surface, 400: processing device, 500: molding device, 600: attachment device, AB: adherend, AB0: main adherend portion, AB1: first side adherend portion, AB2: second side adherend portion

Claims

1. A molding step of preforming a decorative sheet using a jig; and a bonding step of bonding the preformed decorative sheet to an adherend, The jig includes a first curved portion and a second curved portion extending in a direction non-parallel to a direction in which the first curved portion extends, In the forming step, the decorative sheet is pulled and bent at the first curved portion and the second curved portion to form the decorative sheet to include a base portion extending on a base surface defined by the first curved portion and the second curved portion, a first side portion connected to the base portion on the first curved portion and bent relative to the base portion on the first curved portion, and a second side portion connected to the base portion on the second curved portion and bent relative to the base portion on the second curved portion, the adherend includes a main adhesion portion, a first side adhesion portion connected to the main adhesion portion and extending along a first direction, and a second side adhesion portion connected to the main adhesion portion and extending along a second direction non-parallel to the first direction; The decorative sheet application method includes a placement step of placing the decorative sheet on the substrate so that the base portion is located on the main deposition portion, the first side portion faces the first side deposition portion, and the second side portion faces the second side deposition portion, and a joining step of joining the decorative sheet to the substrate.

2. The decorative sheet attaching method according to claim 1 , wherein in the forming step, the heated decorative sheet is bent at the first bent portion and the second bent portion.

3. The decorative sheet attachment method according to claim 1 , wherein in the bonding step, the decorative sheet is bonded to the adherend while being shrunk.

4. The decorative sheet attaching method according to claim 3 , wherein in the bonding step, the decorative sheet is shrunk by heating the decorative sheet.

5. In the molding step, the first side portion and the second side portion are bent toward a first side in a thickness direction of the base portion with respect to the base portion, The decorative sheet attaching method according to claim 1 , wherein in the attaching step, the first side portion and the second side portion are bent relative to the base portion toward a second side opposite the first side in the thickness direction of the base portion.

6. The preformed decorative sheet includes a first extending portion extending from the first side portion and a second extending portion extending from the second side portion, The decorative sheet application method according to claim 1 , wherein the preformed decorative sheet has a first extension portion protruding at a portion where the first extension portion is connected to the first side portion, and a second extension portion protruding at a portion where the second extension portion is connected to the second side portion.

7. 2. The decorative sheet application method of claim 1, wherein the jig includes a first side extending in one direction from the first curved portion, a second side extending in the one direction from the second curved portion, a first edge contact portion extending from the first side and contacting an edge of the decorative sheet, and a second edge contact portion extending from the second side and contacting the edge of the decorative sheet.

8. The jig includes a first plate-shaped portion and a second plate-shaped portion that are connected to each other, the fixture includes a support surface extending over the base surface; The support surface is constituted by a side end surface of the first plate-shaped portion and a side end surface of the second plate-shaped portion, A first side surface extending in one direction from the first curved portion is configured by a main surface of the first plate-shaped portion, The first curved portion is formed between the main surface of the first plate-shaped portion and the side end surface of the first plate-shaped portion, A second side surface extending in the one direction from the second curved portion is configured by a main surface of the second plate-shaped portion, The decorative sheet attaching method according to claim 1 , wherein the second curved portion is formed between the main surface of the second plate-shaped portion and the side end surface of the second plate-shaped portion.

9. The jig includes a third plate-shaped portion connected to the first plate-shaped portion and the second plate-shaped portion, The decorative sheet application method according to claim 8, wherein the third plate-shaped portion includes a main surface connected to the side end surface of the first plate-shaped portion that forms the support surface and the side end surface of the second plate-shaped portion that forms the support surface.

10. In the first plate-shaped portion, an end portion remote from the second plate-shaped portion is chamfered, and an end portion of the side end surface remote from the second plate-shaped portion is curved, The decorative sheet attaching method according to claim 8 , wherein an end of the second plate-shaped portion remote from the first plate-shaped portion is chamfered, and an end of the side end face remote from the first plate-shaped portion is curved.

11. The decorative sheet attachment method according to claim 1 , wherein in the forming step, the decorative sheet is preformed under atmospheric pressure.

12. The decorative sheet attachment method according to claim 1 , wherein the adherend is an exterior member of an automobile.

13. A molding step of preforming a decorative sheet using a jig is provided, The jig includes a first curved portion and a second curved portion extending in a direction non-parallel to a direction in which the first curved portion extends, In the forming step, the decorative sheet is formed by pulling the decorative sheet and bending it at the first bent portion and the second bent portion.

14. 14. The decorative sheet molding method according to claim 13, wherein in the molding step, the decorative sheet is molded to include a base portion extending on a base surface defined by the first curved portion and the second curved portion, a first side portion connected to the base portion on the first curved portion and bent relative to the base portion on the first curved portion, and a second side portion connected to the base portion on the second curved portion and bent relative to the base portion on the second curved portion.

15. A molding device for preforming a decorative sheet is provided, The molding device includes a jig, the jig including a first bent portion and a second bent portion extending in a direction non-parallel to a direction in which the first bent portion extends; The forming device is a decorative sheet processing device that forms the decorative sheet by pulling it and bending it at the first bending portion and the second bending portion.

16. The decorative sheet processing device of claim 15, wherein the molding device molds the decorative sheet to include a base portion extending on a base surface defined by the first curved portion and the second curved portion, a first side portion connected to the base portion on the first curved portion and bent relative to the base portion on the first curved portion, and a second side portion connected to the base portion on the second curved portion and bent relative to the base portion on the second curved portion.

17. The decorative sheet processing apparatus according to claim 15, further comprising an attachment device that attaches the preformed decorative sheet to an adherend.

18. A preforming jig for preforming a decorative sheet having a shape with a first edge, a second edge, and a corner located between the first edge and the second edge, A first curved portion and a second curved portion extending in a direction non-parallel to the direction in which the first curved portion extends, The first curved portion extends along the first edge of the decorative sheet, The second curved portion extends along the second edge of the decorative sheet.

Images