Vehicle trunk door

Abstract

The trunk door for a vehicle has a first cord member (50) provided on a door body (1) constituted by resin panel members (10, 30). The first cord member (50) has: a wire (51) routed in the panel members (10, 30); a first mounting member (52) for fixing the wire (51) to the panel members (10, 30); a second mounting member (52) for fixing the wire (51) to the panel members (10, 30); and a bracket (56) for holding an intermediate portion of the wire (51) between the first mounting member (52) and the second mounting member (52) so as to be freely movable.

Description

Technical Field

[0001] The present invention relates to a rear trunk door for a vehicle. Background Art

[0002] In Patent Documents 1 - 3, there is disclosed a rear trunk door for a vehicle that can prevent a resin panel member constituting a door main body from scattering even if a relatively large hole is formed in the panel member. In this rear trunk door for a vehicle, a reinforcing piece having extensibility is provided on the door main body.

[0003] Prior Art Documents

[0004] Patent Documents

[0005] Patent Document 1: Japanese Patent No. 6166670

[0006] Patent Document 2: Japanese Patent No. 6166673

[0007] Patent Document 3: Japanese Patent No. 6488186 Summary of the Invention

[0008] Problems to be Solved by the Invention

[0009] However, in the methods disclosed in Patent Documents 1 - 3, since the reinforcing piece is firmly fixed to the fixing portion of the door main body, there is a possibility that stress concentration occurs at the fixing portion, inducing fracture of the door main body.

[0010] The present invention has been made in view of this problem, and an object thereof is to provide a rear trunk door for a vehicle that can alleviate stress concentration and suppress fracture of the door main body.

[0011] Means for Solving the Problems

[0012] A rear trunk door for a vehicle according to one aspect of the present invention has a cord-like member provided on a door main body composed of a resin panel member. The cord-like member has: a cord-like main body portion that is routed from a first fixing point of the door main body to a second fixing point; a first mounting member that fixes the cord-like main body portion to the first fixing point; a second mounting member that fixes the cord-like main body portion to the second fixing point; and a holding member that holds the intermediate portion of the cord-like main body portion between the first mounting member and the second mounting member so as to be freely movable.

[0013] Effects of the Invention

[0014] According to the present invention, it is possible to alleviate stress concentration and suppress fracture of the door main body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an explanatory diagram showing the structure of the rear trunk door for a vehicle according to the present embodiment.

[0016] Figure 2 It is a diagram showing the detailed structure of the first cable member.

[0017] Figure 3 It is an explanatory diagram showing the structure of the bracket.

[0018] Figure 4 It is along Figure 3 The cross-sectional view taken along the line AA shown.

[0019] Figure 5 It is an explanatory diagram showing a modified example of the bracket.

[0020] Figure 6 It is an explanatory diagram showing a modified example of the bracket.

[0021] Figure 7 It is an explanatory diagram showing the structure of a modified example of a vehicle trunk lid.

[0022] Figure 8 It is an explanatory diagram showing the structure of a modified example of a vehicle trunk lid.

[0023] Figure 9 It is a diagram showing the structure of a modified example of the cable member. Detailed implementation mode

[0024] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the description of the drawings, the same reference numerals are assigned to the same parts and the description thereof is omitted.

[0025] The vehicle trunk lid of the present embodiment will be described. This vehicle trunk lid is applicable to a hatchback car and opens and closes the opening at the rear of the vehicle body. The upper end of the vehicle trunk lid is connected to the rear end of the vehicle body roof by a hinge mechanism (not shown), and the vehicle trunk lid rotates in the vertical direction around the hinge mechanism.

[0026] In Figure 1 , the vehicle trunk lid is mainly composed of the following components: a door main body 1 made of a resin panel member; and a first cable member 50 and a second cable member 60 provided on the door main body 1.

[0027] The door main body 1 includes: an inner door panel 10 that forms a half-door inside the vehicle compartment; and an outer door panel 30 that forms a half-door outside the vehicle compartment (refer to Figure 6 ). The inner door panel 10 and the outer door panel 30 are formed products made of a resin material such as glass fiber reinforced resin, and are each formed as a single panel. The peripheral edge of the inner door panel 10 and the peripheral edge of the outer door panel 30 are joined by an adhesive, and the door main body 1 is configured to have a closed cross-section with a space formed inside. In Figure 1In the figure, a state of looking at the door body 1 from the rear of the vehicle is shown. The outer door panel 30 is omitted, and only the inner door panel 10 is shown.

[0028] The inner door panel 10 has the required shaping such as concavities, convexities, and openings necessary for the appearance and function of the rear trunk door of the vehicle, but is formed into a flat shape as a whole. In Figure 1 the figure, the detailed shaping such as concavities and openings formed in the inner door panel 10 is omitted (the same applies to Figure 7 , 8 described later).

[0029] An opening 15 corresponding to the rear window is formed in the approximate center of the inner door panel 10. The inner door panel 10 is composed of an upper part 11 located above the opening 15, side parts 12 and 13 respectively located on the left and right of the opening 15, and a lower part 14 located below the opening 15.

[0030] A plurality of reinforcing members 20, 21, and 22 for compensating for the rigidity of the inner door panel 10 are provided on the inner door panel 10. Each of the reinforcing members 20, 21, and 22 is formed of a material with relatively high rigidity such as metal.

[0031] The first reinforcing member 20 is provided in such a way as to straddle between the upper part 11 and the left side part 12 and in such a way as to straddle between the upper part 11 and the right side part 13 respectively. The first reinforcing member 20 strengthens the mounting part where the hinge mechanism connecting the door body 1 and the rear end of the roof panel is installed. The second reinforcing member 21 is provided in such a way as to straddle between the left side part 12 and the lower part 14 and in such a way as to straddle between the right side part 13 and the lower part 14 respectively. The third reinforcing member 22 is provided on the lower side of the center of the lower part 14. The third reinforcing member 22 strengthens the mounting part where the latch unit for mounting the locking mechanism for locking the door body 1 to the vehicle body is installed.

[0032] The first cable member 50 and the second cable member 60 are laid between the respective reinforcing members 20, 21, and 22 and are routed around the opening 15 of the inner door panel 10 for one week. The first cable member 50 and the second cable member 60 serve the following functions: when a relatively large load such as a rear collision acts on the door body 1, they suppress the respective separated door bodies 1 from flying apart.

[0033] The first cable member 50 is provided on the right side and the left side of the door body 1 respectively with the center of the door body 1 as the boundary. The first cable member 50 on the right side and the first cable member 50 on the left side are symmetrically formed with the center of the door body 1 as the boundary. The first cable member 50 is routed from the first reinforcing member 20 as the first fixed point, respectively via the second reinforcing member 21 and a predetermined part of the lower part 14 as relay points, to the third reinforcing member 22 as the second fixed point.

[0034] The first cable member 50 is routed not along the shortest path but along a predetermined path, which is the path that passes through the shortest distance between the wiring points including the first fixing point, the second fixing point, and the two relay points. From the viewpoints of making the overall length of the first cable member 50 sufficiently longer than the overall length of the shortest path and avoiding interference between the door components constituting the vehicle trunk lid and the first cable member 50, a path for routing the first cable member 50 is preset in advance.

[0035] As Figure 1 and Figure 2 shown, the first cable member 50 includes a wire 51, a mounting member 52, and a bracket 56.

[0036] The wire 51 is a cable-shaped main body portion constituting the first cable member 50. The wire 51 has sufficient strength so that it will not break easily even when the door main body 1 breaks and a large tensile load acts on the wire 51. For example, the wire 51 is formed by twisting a plurality of metal core wires. However, as long as the wire 51 has the above-mentioned strength, it may also be a structure formed by twisting carbon fibers or the like. In addition, the wire 51 may be formed of a strip-shaped member having a certain width.

[0037] The mounting members 52 are provided at both ends of the wire 51. The mounting member 52 corresponding to one end of the wire 51 (hereinafter, referred to as the "first mounting member 52" as needed) fixes one end of the wire 51 to the first reinforcing member 20. The mounting member 52 corresponding to the other end of the wire 51 (hereinafter, referred to as the "second mounting member 52" as needed) fixes the other end of the wire 51 to the third reinforcing member 22.

[0038] The mounting member 52 is firmly fixed to the end of the wire 51 so that the end of the wire 51 will not easily fall off. For example, the mounting member 52 is a crimp terminal that is crimped to the end of the wire 51. An opening through which a fastening member 54 such as a bolt passes is formed in the mounting member 52. The mounting member 52 is mounted on the first reinforcing member 20 and the third reinforcing member 22 in a fixed state by the fastening member 54.

[0039] The bracket 56 is provided at one or more positions in the middle portion of the wire 51 between the first mounting member 52 and the second mounting member 52. Specifically, the brackets 56 are respectively provided between the central portion of the wire 51 and the first mounting member 52 and between the central portion of the wire 51 and the second mounting member 52. The bracket 56 on the first mounting member 52 side (hereinafter, referred to as the "first bracket 56" as needed) holds the wire 51 on the second reinforcing member 20. The bracket 56 on the second mounting member 52 side (hereinafter, referred to as the "second bracket 56" as needed) holds the wire 51 on the lower portion 14.

[0040] In Figure 3 and Figure 4 the bracket 56 includes: an annular portion 56c formed by bending a flat plate into a ring shape; and a pair of mounting pieces 56a and 56b connected to the annular portion 56c.

[0041] A space is formed inside the annular portion 56c for the wire 51 to pass through. The inner diameter of the annular portion 56c is set larger than the outer diameter of the wire 51, and the annular portion 56c surrounds the outer periphery of the wire 51 in a ring shape. With this structure, the bracket 56 holds the wire 51 so that it can move freely.

[0042] The pair of mounting pieces 56a and 56b are the parts for mounting the annular portion 56c to the door main body 10, and openings 56d are formed through which fastening members 58 such as bolts pass. The bracket 56 is mounted to the second reinforcing member 21 and the lower part 14 in a fixed state by the fastening members 58.

[0043] As Figure 1 shown, a second cable member 60 is provided in the upper part 11. The second cable member 60 is routed horizontally from the first reinforcing member 20 on the left side to the first reinforcing member 20 on the right side. The second cable member 60 includes a wire 61 and a mounting member 62.

[0044] The structures of the wire 61 and the mounting member 62 respectively correspond to the structures of the wire 51 and the mounting member 52 of the first cable member 50. That is, the mounting member 62 corresponding to one end of the wire 61 fixes one end of the wire 61 to the first reinforcing member 20 on the left side. The mounting member 62 corresponding to the other end of the wire 61 fixes the other end of the wire 61 to the first reinforcing member 20 on the right side. The mounting member 62 is mounted to the first reinforcing members 20 on the left and right in a fixed state by the fastening members 64.

[0045] The first cable member 50 and the second cable member 60 are continuously routed from the first reinforcing member 20 in the upper left via the second reinforcing member 21 in the left center, the third reinforcing member 22 in the lower center, the second reinforcing member 21 in the right center, and the first reinforcing member 20 in the upper right to return to the first reinforcing member 20 in the upper left. Thus, like the upper part 11, the left side part 12, the lower part 14, and the right side part 13 located around the opening 15, the three cable members 50 and 60 are connected in a closed loop by the five reinforcing members 20, 21, and 22.

[0046] When a large load such as a rear collision is input to the trunk door for a vehicle, there is a possibility that the door main body 1 breaks and scatters. However, since the cable-like members 50 and 60 are routed through the main parts of the door main body 1, the door main bodies 1 separated due to breakage can be tied to each other by the cable-like members 50 and 60. Thereby, scattering of the door main body 1 can be suppressed.

[0047] In addition, in the trunk door for a vehicle according to the present embodiment, a bracket 56 for holding the wire material 51 to the door main body 1 is provided at an intermediate portion of the wire material 51 routed from the first reinforcing member 20 to the third reinforcing member 22. The bracket 56 is configured to allow movement of the wire material 51. Since the mounting member 52 is fixed to the wire material 51, when the mounting member 52 moves as the door main body 1 is damaged, a situation where the wire material 51 is stretched occurs. Even in such a situation, the intermediate portion of the wire material 51 can move relative to the bracket 56, so that a large load can be suppressed from acting on the bracket 56 mounted on the door main body 1. As a result, stress concentration at the mounting point (relay point) of the bracket 56 in the door main body 1 can be alleviated, and thus breakage of the door main body 1 can be suppressed.

[0048] Compared with the first cable-like member 50 of the present embodiment, a structure in which a plurality of wire materials, for example, three wire materials, the first wire material to the third wire material, are continuously routed can be considered. That is, one end of the first wire material is fixed to the first reinforcing member 20 (first fixing point), and the other end thereof is fixed to the second reinforcing member 21 (relay point). One end of the second wire material is fixed to the second reinforcing member 21 (relay point), and the other end thereof is fixed to the lower portion 14 (relay point). Similarly, one end of the third wire material is fixed to the lower portion 14 (relay point), and the other end thereof is fixed to the third reinforcing member (second fixing point). Even in such a structure, like the first cable-like member 50, the three wire materials are continuously routed from the first reinforcing member 20 via the second reinforcing member 21 and the lower portion 14 to the third reinforcing member 22.

[0049] However, in the case of a structure in which a plurality of such wire materials fixed at both ends are connected, the wire materials are also firmly fixed at the relay points. Therefore, when the wire materials are stretched by being dragged by the fixed points, a large load acts on the relay points. As a result, stress concentration occurs at the relay points of the door main body 1, and the door main body 1 may break. In this regard, according to the first cable-like member 50 of the present embodiment, as described above, the bracket 56 is applied to the relay points of the door main body 1, so that stress concentration at the relay points can be alleviated. Thereby, breakage of the door main body 1 can be suppressed.

[0050] In addition, in order to suppress excessive tensile force generated in the wire, the length of the wire needs to have sufficient margin with respect to the length of the shortest path between the wiring points. In the case of a structure in which a plurality of wires fixed at both ends are connected, it is necessary to set a margin for each wire. On the other hand, according to the structure of the present embodiment, movement of the wire 51 is allowed in the bracket 56 that holds the middle portion of the wire 51. Therefore, as long as the entire length of the wire 51 has a surplus length (room) corresponding to a predetermined margin, by the movement of the wire 51, the surplus length of the margin can be utilized between the respective wiring points. Thus, compared with the case of arranging a plurality of wires, the entire length of the wire 51 can be shortened. Therefore, an increase in weight and cost caused by the wire 51 can be suppressed.

[0051] According to the first cable member 50 of the present embodiment, both ends of the wire 51 are fixed, and the middle portion of the wire 51 is held by the bracket 56. Since both ends of the wire 51 are fixed, a situation occurs in which the end portion of the wire 51 is stretched due to breakage of the door main body 1 or the like. Even in such a case where the end portion of the wire 51 is stretched, a large load can be suppressed from acting on the bracket 56 that holds the middle of the wire 51. As a result, stress concentration on the door main body 1 can be alleviated, and thus breakage of the door main body 1 can be suppressed.

[0052] In addition, according to the vehicle trunk lid of the present embodiment, the annular portion 56c of the bracket 56 is configured to surround the outer periphery of the wire 51 in a ring shape. Therefore, the outer periphery of the wire 51 is not tightly clamped by the bracket 56, and a gap is ensured between the outer periphery of the wire 51 and the bracket 56. The bracket 56 can allow the movement of the wire 51 using this gap.

[0053] In addition, according to the vehicle trunk lid of the present embodiment, the holding member that holds the wire 51 so as to be freely movable is constituted by the bracket 56 attached to the door main body 1. According to this structure, by attaching the bracket 56 to the door main body, the wire 51 can be simply held.

[0054] On the other hand, since the bracket 56 of the present embodiment surrounds the outer periphery of the wire 51 in a ring shape, even when the wire 51 is stretched, the wire 51 is not detached from the bracket 56 and is held. However, the bracket 56 can allow the movement of the wire 51. Therefore, even when the wire 51 is stretched, the wire 51 can slide, so the bracket 56 is not stretched together with the wire 51, and a large load can be suppressed from acting on the bracket 56. Thereby, stress concentration on the door main body 1 can be alleviated, and thus breakage of the door main body 1 can be suppressed.

[0055] In addition, in the above-described embodiment, the bracket 56 having a structure formed by bending a flat plate is exemplified. However, the bracket 56 may be a structure that holds the outer periphery of the wire 51 in a state where a gap is maintained between it and the outer periphery of the wire 51. For example, asFigure 5 As shown, the bracket 56 can also be composed of an annular ring portion 56e formed as a closed loop and a mounting portion 56f for mounting the ring portion 56e to the door main body 1. By passing the wire 51 through the ring portion 56e, the wire 51 can be held by the ring portion 56e so as to be freely movable.

[0056] In the above-described embodiment, the bracket 56 is mounted on the door inner panel 10. However, the wire 51 is routed in the space between the mutually opposed door inner panel 10 and the door outer panel 30. Thus, as Figure 6 shown, the bracket 35 provided on the door outer panel 30 can also hold the wire 51 so as to be freely movable. Figure 6 The bracket 35 shown has a bracket main body 36 mounted on the door outer panel 30 and a through hole 37 formed in the bracket main body 36. The bracket 35 can hold the wire 51 so as to be freely movable by passing the wire 51 through the through hole 37.

[0057] In addition, in the above-described embodiment, the bracket 56 that holds the middle portion of the wire 51 is applied to the first cable member 50, but the bracket is not applied to the second cable member 60. However, a bracket that holds the middle portion of the wire 61 can also be applied to the second cable member 60.

[0058] In addition, in the above-described embodiment, the brackets 56 are set at two locations in the middle portion of the wire 51. However, the bracket 56 may be provided in such a manner that the wire 51 straddles the assumed fracture site in the door main body 1, and the number of brackets 56 can also be determined depending on the structure of the door main body 1.

[0059] For example, Figure 7 shows a door inner panel 70 as a modified example. The door inner panel 70 is composed of an upper portion 71, left and right side portions 72, 73, and a lower portion 74. The wire 51 of the first cable member 50 is routed from the reinforcing member 80 to the reinforcing member 81 of the reinforcing latch unit, and the reinforcing member 80 extends from the side portions 72, 73 to the lower portion 74. At one location in the middle portion of the wire 51, a bracket 56 is provided, and the middle portion of the wire 51 is held by the bracket 56 so as to be freely movable.

[0060] In the above-described embodiment, the bracket 56 is mounted on the door main body 1, and the wire 51 is held by the bracket 56 so as to be freely movable. However, instead of using a detachable and independent component such as the bracket 56, the wire 51 can be held by a door component that constitutes the door main body 1 so as to be freely movable.

[0061] For example, Figure 8The inner door panel 90 showing a modified example. The wire 51 of the first cord-like member 50 is routed from the reinforcing member 95 on the left side portion 92 to the reinforcing member 95 on the right side portion 93. The middle portion of the wire 51 passes through the through holes 101 and 102 formed in the reinforcing member 100 of the reinforcing latch unit. The middle portion of the wire 51 is held by the through holes 101 and 102 of the reinforcing member 81 so as to be freely movable.

[0062] According to this structure, the reinforcing member 81 as a door component can be used as a holding member, so that an increase in the number of components and cost can be suppressed. In addition, by passing the wire 51 through the through holes 101 and 102 of the reinforcing member 81, the movement of the wire 51 can be allowed.

[0063] In addition, according to the present embodiment, the mounting members 52 for fixedly holding the wire 51 are provided only at both ends of the wire 51. However, as Figure 9 shown, depending on the entire length of the wire 51 or the like, the mounting members 52 for holding the wire 51 in a fixed state may be provided at one or more places in the middle portion of the wire 51.

[0064] In addition, it may be that the mounting members 52 are provided not only at both ends of the wire 51 but also near both ends, and the remaining portion including the end portions of the wire 51 is provided at a position outside the mounting members 52. That is, the wire 51 only needs to be routed from the first fixing point to the second fixing point.

[0065] In addition, in the present embodiment, the mounting members 52 are provided at both ends of the wire 51. However, it may be that both ends of the wire 51 are folded back into a loop, and the fastening members 54 are respectively inserted into the looped both ends to fix both ends of the wire 51 to the first fixing point and the second fixing point. In addition, both ends of the wire 51 may be fixed to the first fixing point and the second fixing point. The mounting member 52 does not need to be constituted by a member separate from the wire 51, and the wire 51 itself may function as a part of the mounting member 52.

[0066] As described above, the embodiments of the present invention have been described, but the discussions and drawings forming a part of this disclosure should not be construed as limiting the present invention. Various alternative embodiments, examples, and application techniques will be apparent to those skilled in the art from this disclosure.

[0067] Explanation of reference numerals

[0068] 1, door main body 1; 10, inner door panel; 20, 21, 22, reinforcing members; 30, outer door panel; 50, cord-like member; 51, wire; 52, mounting member; 56, bracket; 70, inner door panel; 80, 81, reinforcing members; 90, inner door panel; 95, 100, reinforcing members.

Claims

1. A rear trunk door for a vehicle, which opens and closes an opening at the rear of the vehicle body. Among them, This rear trunk door for a vehicle has: A door main body, which is composed of a resin panel member; and A cord-like member, which is provided on the door main body. The cord-like member has: A cord-like main body part, which is routed from a first fixed point of the door main body to a second fixed point; A first mounting member, which is mounted on the first fixed point and fixes the cord-like main body part to the first fixed point; A second mounting member, which is mounted on the second fixed point and fixes the cord-like main body part to the second fixed point; And A holding member, which is provided on the door main body and holds the middle part of the cord-like main body part between the first mounting member and the second mounting member so as to be freely movable. The door main body includes an inner door panel and an outer door panel, and a plurality of reinforcing members for compensating the rigidity of the inner door panel are provided on the inner door panel. The first mounting member and the second mounting member are respectively fixed to any two of the plurality of reinforcing members. The holding member is directly fixed to the panel member of the door main body by a fastening member at a position different from the plurality of reinforcing members.

2. The rear trunk door for a vehicle according to claim 1, wherein The first mounting member is provided at one end of the cord-like main body part and fixes the one end to the first fixed point. The second mounting member is provided at the other end of the cord-like main body part and fixes the other end to the second fixed point.

3. The rear trunk door for a vehicle according to claim 1 or 2, wherein The holding member holds the outer periphery of the cord-like main body part in a state where a gap is provided between the holding member and the outer periphery of the cord-like main body part.

4. The rear trunk door for a vehicle according to claim 1 or 2, wherein The holding member is a bracket that can be disassembled and assembled relative to the door main body. The bracket has: a ring-shaped part that surrounds the outer periphery of the cord-like main body part in a ring shape; and a mounting piece that mounts the ring-shaped part on the door main body.

Images