Ceiling interior material for vehicle

Abstract

To provide a ceiling interior material for a vehicle capable of restraining a situation of causing wrinkles on a board member.SOLUTION: A ceiling interior material for a vehicle comprises a plate-shaped board member 30 constituting a ceiling of a cabin, and a longitudinal reinforcement member 40 disposed on a cabin outside surface 30A of the board member 30 and composed of a material having a linear expansion coefficient larger than that of a material constituting the board member 30. The reinforcement member 40 comprises a pair of adhesion parts 41 and 42 adhered to the cabin outside surface 30A and arranged along a longitudinal direction of the reinforcement member 40, and a connection part 51 that connects the pair of adhesion parts 41 and 42 with each other. The connection part 51 is not adhered to the cabin outside surface 30A, and an intermediate part 51A of the connection part 51 in the longitudinal direction of the reinforcement member 40 has a shape that bends away from the cabin outside surface 30A with respect to both end parts 51B and 51B.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The technology disclosed in this specification relates to a vehicle ceiling interior material. [Background technology]

[0002] Conventionally, a vehicle ceiling interior material is known that is described in the following Patent Document 1. The vehicle ceiling interior material described in Patent Document 1 includes a plate-shaped board member and a reinforcing member (a resin foam) bonded to the upper surface of the board member. By including the reinforcing member, the rigidity of the board member can be increased. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 60-87744 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-mentioned configuration in which the reinforcing member is bonded to the board member, the material of the board member and the material of the reinforcing member may be different. If the linear expansion coefficient of the reinforcing member is large compared to that of the board member, when the temperature of the board member and the reinforcing member is lowered by using a vehicle in a cold region, the reinforcing member may shrink more than the board member, causing stress to act on the board member, and there is a concern that wrinkles may occur in the board member. In order to prevent such a situation, it is possible to change the material of the board member to one with a large linear expansion coefficient or to increase the basis weight to increase the rigidity. However, such a configuration causes problems such as restrictions on the selection of the material of the board member and an increase in the weight of the board member.

[0005] The technology disclosed in this specification was developed based on the above-mentioned circumstances, and aims to provide a vehicle ceiling interior material that can prevent wrinkles from occurring in the board component. [Means for solving the problem]

[0006] As a means for solving the above-mentioned problems, the vehicle ceiling interior material disclosed in this specification comprises: a plate-shaped board member that covers a vehicle panel from the inside of the vehicle cabin and constitutes the ceiling of the vehicle cabin; and a longitudinal reinforcing member that is arranged on the surface of the board member facing the outside of the vehicle cabin and is made of a material having a larger linear expansion coefficient than the material constituting the board member, wherein the reinforcing member is adhered to the surface of the board member facing the outside of the vehicle cabin and comprises a pair of adhesive portions aligned along the longitudinal direction of the reinforcing member and a connecting portion that connects the pair of adhesive portions together, the connecting portion being not adhered to the surface of the board member facing the outside of the vehicle cabin, and a middle portion of the connecting portion in the longitudinal direction of the reinforcing member is bent so as to move away from the surface of the board member facing the outside of the vehicle cabin relative to both end portions.

[0007] In the above configuration, the portion of the reinforcing member that is bonded to the board member is a pair of adhesive portions, and the connecting portion that connects the pair of adhesive portions is not bonded to the surface of the board member on the outside of the vehicle cabin, and the intermediate portion of the connecting portion in the longitudinal direction of the reinforcing member is bent so as to move away from the surface on the outside of the vehicle cabin relative to both ends. In this way, when the temperature of the reinforcing member decreases and the reinforcing member shrinks, the connecting portion expands and contracts in the longitudinal direction of the reinforcing member, absorbing the thermal contraction, and as a result, the pair of adhesive portions can be contracted. By distributing the shrinking portions of the reinforcing member to two locations, it is possible to prevent a situation in which a large stress acts locally on the board member due to the shrinkage of the reinforcing member, and to prevent the board member from being wrinkled. In addition, since the pair of adhesive portions are connected by the connecting portion, it is easier to handle and the rigidity of the reinforcing member can be increased compared to a configuration in which the pair of adhesive portions are separated.

[0008] In addition, a groove portion is formed on the outer surface of the board member facing the vehicle cabin, extending along an airbag arranged adjacent to the reinforcing member on the outer surface of the board member, a portion of the groove portion is arranged so as to overlap with the connecting portion, and a notch portion is formed in the connecting portion at a location where it overlaps with the groove portion.

[0009] When the airbag deploys, the board member pressed by the airbag bends from the groove, allowing the airbag to be deployed more quickly inside the vehicle cabin. In addition, because the connecting portion has a notch at the location where it overlaps with the groove, it is possible to prevent the connecting portion from interfering with the folding of the board member.

[0010] In addition, a plurality of the connecting parts may be arranged in a line along the longitudinal direction of the reinforcing member. By setting the arrangement of the plurality of connecting parts, it is possible to set the degree of contraction of the adhesive part arranged between the adjacent connecting parts.

[0011] Furthermore, a protruding portion protruding toward the vehicle panel may be provided on the surface of one of the pair of adhesive portions facing the vehicle cabin, and a pair of connecting portions may be provided on either side of the protruding portion. When the board member is displaced toward the vehicle panel, the protruding end of the protruding portion abuts against the vehicle panel, thereby restricting the subsequent displacement of the board member. This can further increase the rigidity of the board member. Effect of the Invention

[0012] According to the present invention, it is possible to provide a vehicle ceiling interior material that is capable of suppressing the occurrence of wrinkles in a board member. [Brief description of the drawings]

[0013] [Figure 1] FIG. 1 is a diagram showing a vehicle interior provided with a ceiling interior material according to an embodiment of the present invention. [Diagram 2]A perspective view of the interior ceiling material as seen from the outside of the vehicle (a view of the reinforcing member from the side) [Diagram 3] A perspective view of the interior ceiling material as seen from the outside of the vehicle (a view of the reinforcing member as seen from the side opposite to that of FIG. 2). [Figure 4] FIG. 3 is a perspective view of the reinforcing member as viewed from the inside of the vehicle interior; [Diagram 5] A diagram of the interior ceiling material as seen from outside the vehicle (a plan view of the reinforcing member) [Figure 6] A cross-sectional view of a part of the reinforcing member (corresponding to the cross-sectional view taken along line VI-VI in Figure 5) [Figure 7] A cross-sectional view of a part of the reinforcing member (corresponding to the cross-sectional view taken along line VII-VII in Figure 5) [Figure 8] FIG. 2 is a perspective view of the reinforcing member and the roof panel viewed from inside the vehicle interior; [Figure 9] A cross-sectional view of a part of the reinforcing member (corresponding to the cross-sectional view taken along line IX-IX in Figure 5) [Figure 10] A cross-sectional view of a part of the reinforcing member (corresponding to the cut view along line XX in Figure 5) DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] An embodiment of the present invention will be described with reference to Fig. 1 to Fig. 10. In this embodiment, a vehicle ceiling interior material 20 is exemplified as a vehicle ceiling interior material. As shown in Fig. 1, the ceiling interior material 20 includes a plate-shaped board member 30 (interior material main body) and a reinforcing member 40 (indicated by a broken line in Fig. 1) arranged on the surface of the board member 30 on the outside of the vehicle compartment (outside the vehicle compartment).

[0015] 9, the board member 30 covers the roof panel 10 (vehicle panel) from the inside of the vehicle compartment and constitutes the ceiling of the vehicle compartment. The material of the board member 30 is, for example, a synthetic resin material such as urethane foam, but is not limited to this.

[0016] 2, the reinforcing member 40 has a longitudinal shape extending along the front-rear direction of the vehicle, and is disposed at a location corresponding to a side end of the vehicle rear end of the board member 30. The material of the reinforcing member 40 is a synthetic resin material such as polypropylene or polyethylene, and is configured from a material having a higher linear expansion coefficient than the material constituting the board member 30. The reinforcing member 40 includes three adhesive parts 41, 42, 43 that are adhered to the surface 30A of the board member 30 facing the passenger compartment outside by an adhesive 31 (e.g., hot melt, etc.), and two connecting parts 51, 52 that connect adjacent adhesive parts 41, 42, 43 to each other.

[0017] The adhesive portions 41, 42 (a pair of adhesive portions) are aligned along the longitudinal direction of the reinforcing member 40, and the adhesive portions 41, 42 are connected to each other by a connecting portion 51. The adhesive portions 42, 43 (a pair of adhesive portions) are aligned along the longitudinal direction of the reinforcing member 40, and the adhesive portions 42, 43 are connected to each other by a connecting portion 52. As shown in Figs. 6 and 7, the connecting portions 51, 52 are not adhered to the surface 30A on the outer side of the vehicle interior.

[0018] As shown in Fig. 6, the connecting portion 51 has a U-shape in which an intermediate portion 51A in the longitudinal direction of the reinforcing member 40 (left-right direction in Fig. 6) is bent so as to move away from the surface 30A on the outer side of the vehicle cabin relative to both end portions 51B, 51B. As shown in Fig. 7, the connecting portion 52 has a U-shape in which an intermediate portion 52A in the longitudinal direction of the reinforcing member 40 (left-right direction in Fig. 7) is bent so as to move away from the surface 30A on the outer side of the vehicle cabin relative to both end portions 52B, 52B.

[0019] As shown in Fig. 2, an airbag 11 (curtain shield airbag) is disposed adjacent to the reinforcing member 40 on the outer side of the vehicle compartment of the board member 30. As shown by the dashed line in Fig. 1, the airbag 11 extends in the vehicle front-rear direction and is disposed in front of the reinforcing member 40 (left side in Fig. 1). The space in the vehicle compartment corresponding to the airbag 11 is defined as a passenger compartment, and the space in the vehicle compartment corresponding to the reinforcing member 40 is defined as a luggage compartment. The portion of the board member 30 corresponding to the passenger compartment is provided with components of the airbag 11, so that rigidity is ensured. On the other hand, the portion of the board member 30 corresponding to the luggage compartment is not provided with the airbag 11, so that the reinforcing member 40 is provided to ensure rigidity.

[0020] 2 and 3, grooves 32, 33 extending along the airbag 11 are formed on the surface 30A of the board member 30 facing the exterior of the vehicle compartment. As shown in Fig. 5, one end (part) of the groove 32 is disposed so as to overlap the connecting portion 51, and a notch 51D is formed in the connecting portion 51 at a location where the groove 32 overlaps. Furthermore, a groove 41A is formed on the surface of the adhesive portion 41 facing the exterior of the vehicle compartment at a location where the groove 32 overlaps.

[0021] Groove portion 33 extends so as to branch into two branches near reinforcing member 40, with one end 33A of groove portion 33 being arranged to overlap adhesive portion 41 and the other end 33B being arranged to overlap adhesive portion 42. Groove portion 41B is formed on the surface of adhesive portion 41 facing the cabin exterior at a location overlapping end 33A of groove portion 33. Groove portion 42A is formed on the surface of adhesive portion 42 facing the cabin exterior at a location overlapping end 33B of groove portion 33.

[0022] As shown in FIG. 3, the two connecting parts 51, 52 are arranged in a line along the longitudinal direction of the reinforcing member 40, and a protruding part 62 protruding toward the roof panel 10 (vehicle panel) is provided on the surface of the adhesive part 42 (one of the pair of adhesive parts) facing the vehicle interior. The pair of connecting parts 51, 52 are provided in a manner sandwiching the protruding part 62. The protruding part 62 is substantially box-shaped and open toward the vehicle interior and downward as shown in FIG. 4. As shown in FIG. 8, the protruding end surface of the protruding part 62 is disposed opposite the roof panel 10 via a buffer material 72. In addition, a protruding part 61 protruding toward the roof panel 10 is provided on the surface of the adhesive part 41 facing the vehicle interior. The protruding part 61 is substantially box-shaped and open toward the vehicle interior, and the protruding end surface of the protruding part 61 is disposed opposite the roof panel 10 via the buffer material 71.

[0023] 2, a protruding portion 63 that protrudes toward the roof panel 10 is provided on the surface of the adhesive portion 42 facing the outside of the vehicle compartment, at a location adjacent to the connecting portion 52. As shown in Fig. 9, the protruding portion 63 is generally box-shaped and opens toward the inside of the vehicle compartment (the lower side in Fig. 9), and the protruding end face of the protruding portion 63 is disposed opposite the roof panel 10 via a buffer material 73.

[0024] As shown in FIG. 2, a protruding portion 64 protruding toward the roof panel 10 is provided on the surface of the adhesive portion 43 facing the vehicle interior side. As shown in FIG. 10, the protruding portion 64 is substantially box-shaped and opens toward the vehicle interior side (the lower side of FIG. 10), and the protruding end surface of the protruding portion 64 is disposed opposite the roof panel 10 via the buffer material 74. By providing the protruding portions 61, 62, 63, 64, when the board member 30 is pressed toward the vehicle interior side (roof panel 10 side), the protruding end surfaces of the protruding portions 61, 62, 63, 64 abut against the roof panel 10 via the buffer materials 71, 72, 73, 74, respectively, thereby making it possible to restrict the board member 30 from being displaced toward the vehicle interior side. Note that the buffer materials 71, 72, 73, 74 are disposed opposite the roof panel 10 with a small gap therebetween, but may abut against the roof panel 10. Moreover, a configuration may be adopted in which the cushioning materials 71, 72, 73, and 74 are not provided, and the protruding end faces of the protruding portions 61, 62, 63, and 64 directly abut against the roof panel 10.

[0025] 3, a protrusion 45 protruding toward the roof panel 10 is provided on the surface of the adhesive portion 42 facing the passenger compartment outside, in a manner that connects with a protrusion 61. A through hole 45A is formed in the protruding end surface of the box-shaped protrusion 45 that opens to the passenger compartment side. In addition, a protrusion 46 protruding toward the roof panel 10 is provided on the surface of the adhesive portion 42 facing the passenger compartment outside, in a manner that connects with a protrusion 64. A through hole 46A is formed in the protruding end surface of the box-shaped protrusion 46 that opens to the passenger compartment side.

[0026] When bonding the reinforcing member 40 to the board member 30, the tip of the positioning pin 95 (see the dashed line in FIG. 10) is inserted into the through holes 45A, 46A from the opposite side of the board member 30, so that the reinforcing member 40 can be accurately positioned with respect to the board member 30, and then the positioning pin 95 is displaced toward the board member 30, so that the reinforcing member 40 can be bonded to the board member 30 at an accurate position. Note that the through holes 45A, 46A are formed on the protruding end faces of the protruding parts 45, 46, and are therefore disposed at a distance from the adhesive 31. Therefore, when the positioning pin 95 is inserted into the through holes 45A, 46A, it is possible to prevent the adhesive 31 from adhering to the tip of the positioning pin 95.

[0027] As shown in Fig. 9, ribs 81, 82 protruding toward the outside of the vehicle cabin are formed on the outer peripheral end of the surface of each of the adhesive parts 41, 42, 43 (adhesive part 42 is shown in Fig. 9) facing the vehicle cabin. Also, as shown in Fig. 4, lattice-shaped ribs 83, 84 are formed on the surface of adhesive part 42 facing the vehicle cabin. Also, as shown in Fig. 3, a lattice-shaped rib 85 protruding toward the outside of the vehicle cabin is formed on the surface of adhesive part 41 facing the vehicle cabin, connected to both protruding parts 45, 61. Also, as shown in Fig. 4, ribs 86, 87, 88, 89 are formed inside protruding parts 61, 62, 63, 64, respectively.

[0028] 2, a rib 90 connecting the protruding portion 63 and the connecting portion 52 is formed on the surface of the adhesive portion 42 facing the exterior of the cabin, and a rib 91 connecting the protruding portion 64 and the connecting portion 52, and a rib 92 connecting the protruding portion 46 and the connecting portion 52 are formed on the surface of the adhesive portion 43 facing the exterior of the cabin. A rib 93 is formed on the surface of the adhesive portion 42 facing the exterior of the cabin at a location adjacent to the protruding portion 62 so as to connect to the protruding portion 62. By providing the ribs 81 to 93, the rigidity of the reinforcing member 40 can be increased.

[0029] Next, the effects of this embodiment will be described. In this embodiment, the portion of the reinforcing member 40 that is bonded to the board member 30 is a pair of bonding portions 41, 42, and the connecting portion 51 that connects the pair of bonding portions 41, 42 is not bonded to the surface 30A of the board member 30 facing the exterior of the vehicle cabin, and the intermediate portion 51A of the connecting portion 51 in the longitudinal direction of the reinforcing member 40 is bent relative to both end portions 51B, 51B so as to move away from the surface 30A facing the exterior of the vehicle cabin.

[0030] In this way, when the temperature of the reinforcing member 40 drops and the reinforcing member 40 shrinks, the connecting portion 51 expands and contracts in the longitudinal direction of the reinforcing member 40, absorbing the thermal contraction, and the pair of adhesive portions 41, 42 can be contracted. By distributing the shrinking portions of the reinforcing member 40 to two portions, it is possible to suppress a situation in which a large stress acts locally on the board member 30 due to the shrinkage of the reinforcing member 40, and it is possible to suppress a situation in which wrinkles occur in the board member 30. In addition, since the pair of adhesive portions 41, 42 are connected by the connecting portion 51, it is easier to handle and the rigidity of the reinforcing member 40 can be increased compared to a configuration in which the pair of adhesive portions 41, 42 are separated. The same effect is achieved for the pair of adhesive portions 42, 43 and the connecting portion 52.

[0031] In addition, a groove portion 32 is formed on the exterior surface 30A of the board member 30 facing the vehicle interior, extending along the airbag 11 arranged adjacent to the reinforcing member 40 on the exterior surface 30A of the vehicle interior, and a portion of the groove portion 32 is arranged so as to overlap with the connecting portion 51, and a cutout portion 51D is formed in the connecting portion 51 at the location where it overlaps with the groove portion 32.

[0032] When the airbag 11 is deployed, the board member 30 pressed by the airbag 11 bends from the groove 32, allowing the airbag 11 to be deployed more quickly inside the vehicle cabin. Since the cutout 51D is formed at the location where the connecting portion 51 overlaps with the groove 32, it is possible to prevent the connecting portion 51 from interfering with the folding of the board member 30.

[0033] Moreover, the connecting parts 51, 52 are arranged side by side along the longitudinal direction of the reinforcing member 40. By setting the arrangement of the connecting parts 51, 52, it is possible to set the degree of contraction of the adhesive part 42 arranged between the adjacent connecting parts 51, 52.

[0034] Furthermore, of the pair of adhesive parts 41, 42, a protruding part 62 that protrudes towards the roof panel 10 is provided on the surface of one adhesive part 42 facing the outside of the vehicle compartment, and the connecting parts 51, 52 are provided in a manner that sandwiches the protruding part 62. When the board member 30 is displaced towards the roof panel 10, the protruding end of the protruding part 62 abuts against the roof panel 10, thereby restricting the subsequent displacement of the board member 30. This makes it possible to further increase the rigidity of the board member 30.

[0035] Further, a groove portion 41A is formed on the surface of the adhesive portion 41 facing the exterior of the vehicle compartment at a location overlapping with the groove portion 32, and a groove portion 41B is formed on the surface of the adhesive portion 41 facing the exterior of the vehicle compartment at a location overlapping with the end portion 33A of the groove portion 33. Further, a groove portion 42A is formed on the surface of the adhesive portion 42 facing the exterior of the vehicle compartment at a location overlapping with the end portion 33B of the groove portion 33. Providing such groove portions 41A, 41B, 42A can prevent the reinforcing member 40 from interfering with the folding of the board member 30 when the airbag 11 is deployed.

[0036] <Other embodiments> The technology disclosed in this specification is not limited to the embodiments described above and illustrated in the drawings, and for example, the following embodiments are also included within the technical scope. (1) The ceiling interior materials exemplified in the above embodiment are not limited to those for vehicles. For example, the above ceiling interior materials can be applied to vehicles such as trains and recreational vehicles as ground vehicles, airplanes and helicopters as flying vehicles, and ships and submarines as marine and underwater vehicles. (2) In the above embodiment, the connecting portions 51 and 52 are U-shaped, but the shape of the connecting portions is not limited to this. For example, the connecting portions may be V-shaped. (3) In the above embodiment, the reinforcing member 40 is disposed adjacent to the airbag 11, and the cutout 51D is formed in the connecting portion 51 to facilitate deployment of the airbag 11. However, the cutout 51D may be provided in a configuration in which the airbag 11 is not disposed. Even in a case in which the airbag 11 is not disposed, the rigidity of the reinforcing member 40 can be set by appropriately setting the size of the cutout 51D in the connecting portion 51. (4) In the above embodiment, a roof panel is given as an example of a vehicle panel. However, the present invention is not limited to this, and can be applied to vehicle panels other than roof panels. (5) In the above embodiment, a configuration was illustrated in which two connecting parts are arranged side by side along the longitudinal direction of the reinforcing member, but three or more connecting parts may be arranged side by side along the longitudinal direction of the reinforcing member. [Explanation of symbols]

[0037] 10... roof panel (vehicle panel), 11... airbag, 30... board member, 30A... exterior surface of board member (exterior surface of vehicle), 32... groove portion, 40... reinforcing member, 41, 43... adhesive portion, 42... adhesive portion (one adhesive portion of a pair of adhesive portions), 51, 52... connecting portion, 51A, 52A... intermediate portion in longitudinal direction of reinforcing member, 51B, 52B... end portion in longitudinal direction of reinforcing member, 51D... notch portion, 62... protruding portion

Claims

1. a plate-shaped board member that covers the vehicle panel from the inside of the vehicle compartment and constitutes a ceiling of the vehicle compartment; a longitudinal reinforcing member disposed on a surface of the board member facing the outside of the vehicle cabin and made of a material having a linear expansion coefficient greater than that of a material constituting the board member; The reinforcing member is a pair of adhesive portions that are adhered to a surface of the board member on the vehicle exterior side and aligned along a longitudinal direction of the reinforcing member; A connecting portion that connects the pair of adhesive portions to each other, the connecting portion is not bonded to the surface of the board member facing the vehicle cabin exterior, and an intermediate portion of the connecting portion in the longitudinal direction of the reinforcing member is bent relative to both end portions so as to move away from the surface of the board member facing the vehicle cabin exterior.

2. a groove portion is formed on a surface of the board member facing the exterior of the vehicle cabin, the groove portion extending along an airbag disposed adjacent to the reinforcing member on the surface of the board member facing the exterior of the vehicle cabin; A part of the groove portion is arranged so as to overlap with the connecting portion, The vehicle ceiling interior material according to claim 1 , wherein a notch is formed in the connecting portion at a location where the connecting portion overlaps with the groove portion.

3. 3. The vehicle ceiling interior material according to claim 1, wherein the connecting portion comprises a plurality of connecting portions arranged in a line along a longitudinal direction of the reinforcing member.

4. a protruding portion protruding toward the vehicle panel is provided on a surface of one of the pair of adhesive portions facing the vehicle cabin outside; The vehicle ceiling interior material according to claim 3, wherein the connecting portion is provided in a pair on either side of the protruding portion.

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