Vehicle rear part structure

Abstract

To prevent a rear seat cushion from being detached from a rear floor panel in the event of a frontal collision.SOLUTION: A vehicle rear part structure 100 includes: a rear seat cushion 11; a wire member 20 having a downward protruding portion 25 protruding downward at a front part of the rear seat cushion 11; and a clip 50 which is mounted on a rear floor panel 40, the rear seat cushion 11 being mounted on the rear floor panel 40 by means of the clip 50. The rear floor panel 40 has, at a front part thereof, a closed cross-sectional portion 42 extending in a vehicle widthwise direction. The clip 50 is mounted on an upper plate 42A constituting the closed cross-sectional portion 42, and a distal end part 52 of the clip extends into the closed cross-sectional portion 42. The closed cross-sectional portion 42 includes a surface 45A which is disposed on a vehicle rear-side of the clip 50 in the closed cross-sectional portion 42 and with which a side surface of the clip 50 comes into contact.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a rear structure of a vehicle including a rear seat cushion and a rear floor panel. [Background technology]

[0002] Patent Document 1 discloses a structure for a rear seat for a vehicle, in which a part of a wire member arranged inside the rear seat cushion is formed into a downward protrusion that protrudes downward from the underside of the rear seat cushion, and the rear seat cushion is attached to the rear floor panel by inserting this downward protrusion into a resin clip attached to the rear floor panel. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-296903 Summary of the Invention [Problem to be solved by the invention]

[0004] When a vehicle crashes head-on, the rear seat cushion tends to rotate and move toward the front of the vehicle, causing the rear portion to lift up. This causes a rotational moment to act on the resin clip, causing it to rotate relative to the rear floor panel (see Figure 6). In the rear seat structure described in Patent Document 1, this rotational moment could cause the resin clip to come off the rear floor panel, resulting in the rear seat cushion coming off the rear floor panel.

[0005] Therefore, an object of the present disclosure is to prevent a rear seat cushion from coming off a rear floor panel during a frontal collision. [Means for solving the problem]

[0006] The vehicle rear structure disclosed herein comprises a rear seat cushion, a wire member disposed inside the rear seat cushion and having a downward protruding portion that protrudes downward from the underside of the rear seat cushion at the front of the rear seat cushion, and a clip attached to a rear floor panel to hold the downward protruding portion, wherein the rear seat cushion is attached to the rear floor panel by inserting the downward protruding portion into the clip, and is characterized in that the rear floor panel is disposed forward and has a square closed cross-sectional portion extending in the vehicle width direction, the clip has a head attached to an upper plate that constitutes the closed cross-sectional portion and a tip extending into the closed cross-sectional portion, the closed cross-sectional portion is disposed within the closed cross-sectional portion on the vehicle rear side of the clip and has a contact surface with which the side of the tip of the clip contacts.

[0007] This allows the contact surface to receive the rotational moment applied from the rear seat cushion in the event of a frontal collision, thereby suppressing rotation of the clip and preventing the clip from coming off the rear floor panel, thereby preventing the rear seat cushion from coming off the rear floor panel in the event of a frontal collision.

[0008] In the vehicle rear structure of the present disclosure, the contact surface may be a surface of a bracket attached to a rear plate that constitutes the closed cross-sectional portion.

[0009] In this way, by adding a bracket to the rear floor panel, rotation of the clip can be easily suppressed, and the rear seat cushion can be prevented from coming off the rear floor panel in the event of a frontal collision.

[0010] In the vehicle rear structure of the present disclosure, the closed cross-sectional portion may include a rear plate provided with a convex portion that protrudes toward the front of the vehicle, and the contact surface may be a front surface of the convex portion.

[0011] This makes it possible to suppress rotation of the clip with a small number of parts. [Effects of the Invention]

[0012] The present disclosure can prevent the rear seat cushion from coming off the rear floor panel during a frontal collision. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a plan view showing a passenger compartment of a vehicle equipped with a vehicle rear structure according to an embodiment. [Figure 2] 4 is a plan view showing a wire member disposed inside a rear seat cushion of the vehicle rear structure according to the embodiment; FIG. [Figure 3] 3 is a perspective view showing a downward protruding portion of the wire member shown in FIG. 2, and is a detailed perspective view of part B shown in FIG. 2. FIG. [Figure 4] 2 is a cross-sectional view showing the vehicle rear structure of the embodiment, taken along the line AA shown in FIG. 1. [Figure 5] FIG. 5 is a detailed cross-sectional view of part C shown in FIG. [Figure 6] 1 is an explanatory diagram showing the movement of a rear seat cushion when a vehicle having a conventional vehicle rear structure is involved in a frontal collision; DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, a vehicle rear structure 100 according to an embodiment will be described with reference to the drawings. First, the configuration of a vehicle 200 equipped with the vehicle rear structure 100 will be described with reference to FIG. 1. Note that FR, UP, and RH shown in each drawing respectively indicate the front side, upper side, and right side of the vehicle 200 equipped with the vehicle rear structure 100. Also, the opposite directions of FR, UP, and RH indicate the rear side, lower side, and left side. Hereinafter, when the directions of front-rear, left-right, and up-down are simply used in the description, they refer to front-rear in the front-rear direction of the vehicle 200, left-right in the left-right direction, and up-down in the up-down direction, unless otherwise specified.

[0015] As shown in FIG. 1, vehicle 200 includes a floor panel 60, a rear floor panel 40, and a rear seat 10. Floor panel 60 forms the front portion of the floor of the vehicle interior. A front seat (not shown) is attached on top of floor panel 60. Rear floor panel 40 forms the rear portion of the floor of the vehicle interior. Rear seat 10 is attached on top of rear floor panel 40. Rear seat 10 includes a rear seat cushion 11 on which an occupant sits, and a rear seat back 12 that supports the occupant's back.

[0016] The vehicle rear structure 100 is composed of a rear seat cushion 11, a wire member 20, a clip 50, a rear floor panel 40, and a bracket 45.

[0017] 2, the rear seat cushion 11 is provided with a foamed resin pad 15 that forms the seat portion. A wire member 20 that reinforces the seat portion is disposed within the pad 15.

[0018] The wire member 20 is made up of a front upper wire 21, a front lower wire 22, a front fixed wire 23, a rear upper wire 31, a rear lower wire 32, a rear fixed wire 33, a rear cross wire 34, and a center wire 35. The front fixed wire 23 fixes the front portion of the rear seat cushion 11 to the rear floor panel 40. The rear fixed wire 33 fixes the rear portion of the rear seat cushion 11 to the body.

[0019] The front upper wire 21 is a generally U-shaped wire having a central portion extending in the vehicle width direction, left and right ends curved toward the rear of the vehicle, and left and right leg portions 21A extending toward the rear of the vehicle. The front lower wire 22 is disposed below the front upper wire 21 and is a generally U-shaped wire having leg portions 22A extending toward the rear of the vehicle. The rear upper wire 31 is a generally U-shaped wire having two leg portions 31A extending from the rear of the vehicle toward the front of the vehicle. The rear lower wire 32 is disposed below the rear upper wire 31 and is a generally U-shaped wire having two leg portions 32A extending from the rear of the vehicle toward the front of the vehicle. The rear end of the leg portion 21A of the front upper wire 21 and the rear end of the leg portion 22A of the front lower wire 22 are connected to the front end of the leg portion 32A of the rear lower wire 32. The left and right rear lower wires 32 are connected by a rear cross wire 34. The center wire 35 is a generally U-shaped wire that extends in the vehicle width direction behind the center of the rear seat cushion 11 and has two legs 35A that extend toward the front of the vehicle at positions slightly offset to the left and right from the center in the vehicle width direction. A front end of the center wire 35 is connected to the front upper wire 21. An end of the rear upper wire 31 at the center in the vehicle width direction is connected to the center wire 35.

[0020] As shown in FIG. 3, the front fixed wire 23 includes an upper connection portion 24 connected to the front upper wire 21, a lower connection portion 26 connected to the front lower wire 22, and a U-shaped downward protrusion 25 disposed between the upper connection portion 24 and the lower connection portion 26. The downward protrusion 25 is composed of two legs 25A and a curved lower end portion 25B connecting the two legs 25A. As shown in FIG. 4, the downward protrusion 25 protrudes downward from the underside of the rear seat cushion 11. The downward protrusion 25 is inserted into a clip 50 attached to the rear floor panel 40 and fixed to the rear floor panel 40.

[0021] 1 and 4, the rear floor panel 40 includes a flat plate portion 41 disposed at the rear and a closed cross-sectional portion 42 disposed at the front. The rear seat cushion 11 is placed on the upper surface of the flat plate portion 41.

[0022] The closed cross-sectional portion 42 is a rectangular closed cross-sectional portion composed of an upper plate 42A, a lower plate 42B, a front plate 42C, and a rear plate 42D. The closed cross-sectional portion 42 extends in the vehicle width direction and constitutes a frame member of the body. The lower end of the front plate 42C of the closed cross-sectional portion 42 is connected to the floor panel 60. A hole 42E is formed in the upper plate 42A of the closed cross-sectional portion 42. A clip 50 is attached to the hole 42E.

[0023] As shown in FIG. 5 , the clip 50 includes a head 51, a tip 52, an engagement claw 53, a wire hole 54, and a wire lock portion 55. The head 51 is larger than the hole 42E and is fixed to the upper plate 42A. The tip 52 extends downward from the head 51. The outer dimensions of the tip 52 are slightly smaller than the inner dimensions of the hole 42E and are inserted from the hole 42E into the closed cross-sectional portion 42. The tip 52 is inserted from the hole 42E into the closed cross-sectional portion 42 and extends toward the inside of the closed cross-sectional portion 42. The engagement claw 53 is formed between the tip 52 and the head 51. The outer dimensions of the engagement claw 53 are slightly larger than the inner dimensions of the hole 42E. An engagement groove 53A is formed between the engagement claw 53 and the head 51. The engagement groove 53A engages with the periphery of the hole 42E to fix the head 51 of the clip 50 to the closed cross-sectional portion 42.

[0024] Head portion 51 and tip portion 52 are provided with wire holes 54 into which downward protrusion 25 is inserted. A wire lock portion 55 protruding from the inner surface of wire hole 54 is provided at the bottom of wire hole 54 so as to lock lower end portion 25B of downward protrusion 25. When downward protrusion 25 is inserted into wire hole 54 of clip 50 and lower end portion 25B is inserted beyond wire lock portion 55, lower end portion 25B is held by clip 50.

[0025] A bracket 45 is attached to the rear plate 42D of the closed cross-sectional portion 42. A surface 45A on the vehicle front side of the bracket 45 is disposed within the closed cross-sectional portion 42, rearward of the tip portion 52, and extends along the side surface of the tip portion 52. As will be described later, the surface 45A forms a contact surface with which the side surface of the tip portion 52 comes into contact when the vehicle 200 crashes head-on and the rear end 51A of the head portion 51 of the clip 50 rotates so as to be lifted.

[0026] Next, with reference to Figures 4 and 5, the movement of the rear seat cushion 11 when a vehicle 200 equipped with the vehicle rear structure 100 of this embodiment experiences a frontal collision will be described. As indicated by arrow 91 in Figure 4, when the vehicle 200 experiences a frontal collision, the rear seat cushion 11 attempts to move toward the front of the vehicle while rotating counterclockwise so that the rear portion is lifted. Therefore, as indicated by arrow 92 in Figure 5, a rotational moment is applied to the clip 50, which attempts to rotate counterclockwise relative to the rear floor panel 40. This rotational moment causes the rear end 51A of the head 51 to lift, and the tip 52 to rotate counterclockwise toward the rear of the vehicle. However, as indicated by outline arrow 93 in Figure 5, when the clip 50 rotates counterclockwise, the rear side of the tip 52 comes into contact with the surface 45A. As a result, the rotational moment applied to the clip 50 is absorbed by the rear panel 42D. Therefore, the clip 50 does not rotate relative to the rear floor panel 40, and the rear end of the engagement claw 53 of the clip 50 is prevented from coming out of the hole 42E. Therefore, the rear seat cushion 11 is prevented from coming off the rear floor panel 40.

[0027] Next, with reference to Figure 6, we will explain the movement of the rear seat cushion 11 when a vehicle 210 equipped with a conventional vehicle rear structure 110 that does not have the bracket 45 is involved in a frontal collision. The vehicle rear structure 110 has the same structure as the vehicle rear structure 100 described above, except that it does not have the bracket 45.

[0028] When the vehicle 210 is involved in a frontal collision, the rear seat cushion 11 rotates counterclockwise so that the rear portion is lifted, and moves toward the front of the vehicle, as indicated by arrow 94 in FIG. 6. At this time, a counterclockwise rotational moment is applied to the clip 50. Note that the chain line in FIG. 6 indicates the rear seat cushion 11 when it rotates. As a result, the rear end of the engaging claw 53 of the clip 50 disengages from the hole 42E, and the clip 50 comes off the rear floor panel 40. Then, the rear seat cushion 11 comes off the rear floor panel 40 together with the clip 50.

[0029] On the other hand, in the vehicle rear structure 100 of the embodiment, as described with reference to Figures 4 and 5, the bracket 45 suppresses rotation of the clip 50 and prevents the clip 50 from coming off the rear floor panel 40, thereby preventing the rear seat cushion 11 from coming off the rear floor panel 40.

[0030] In the above description, the bracket 45 is provided on the rear plate 42D of the closed cross-sectional portion 42, but this is not limiting. For example, the rear plate 42D may be provided with a protrusion that protrudes toward the front of the vehicle, and the side of the tip portion 52 may be configured to abut against the front surface of the protrusion. In this case, the front surface of the protrusion forms the abutting surface. [Explanation of symbols]

[0031] 10 rear seat, 11 rear seat cushion, 12 rear seat back, 15 pad, 20 wire member, 21 front upper wire, 21A, 22A, 25A, 31A, 32A, 35A leg portion, 22 front lower wire, 23 front fixed wire, 24 upper connection portion, 25 downward protrusion portion, 25B lower end portion, 26 lower connection portion, 31 rear upper wire, 32 rear lower wire, 33 rear fixed wire, 34 rear cross wire, 35 center wire, 40 rear floor panel, 41 flat plate portion, 42 closed cross section portion, 42A upper plate, 42B lower plate, 42C front plate, 42D rear plate, 42E hole, 45 bracket, 45A surface (contact surface), 50 clip, 51 head portion, 52 tip portion, 53 engagement claw, 53A engagement groove, 54 wire hole, 55 Wire lock section, 60 floor panel, 100, 110 vehicle rear structure, 200, 210 vehicle.

Claims

1. Rear seat cushions and a wire member disposed inside the rear seat cushion and having a downward protruding portion that protrudes downward from a lower surface of the rear seat cushion at a front portion of the rear seat cushion; a clip attached to the rear floor panel to hold the downward protrusion, a rear structure for a vehicle in which the rear seat cushion is attached to the rear floor panel by inserting the downward protrusion into the clip, the rear floor panel is disposed forward and has a rectangular closed cross-section portion extending in the vehicle width direction, The clip has a head attached to the upper plate that forms the closed cross-sectional portion and a tip extending into the closed cross-sectional portion, the closed cross-sectional portion is disposed on a vehicle rear side of the clip within the closed cross-sectional portion and includes a contact surface with which a side surface of the tip end of the clip comes into contact; A vehicle rear structure characterized by:

2. 2. The vehicle rear structure according to claim 1, the contact surface is a surface of a bracket attached to a rear plate that constitutes the closed cross-sectional portion; A vehicle rear structure characterized by:

3. 2. The vehicle rear structure according to claim 1, the closed cross-sectional portion includes a rear plate provided with a convex portion that protrudes toward the front of the vehicle, the contact surface is a front surface of the protrusion; A vehicle rear structure characterized by:

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