JP2010095237A - Bumper retainer and vehicle rear part structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bumper retainer capable of preventing a flaw from being given to an article and the article from being damaged even if the article is clamped between a lid distal end part and an upper end part of a bumper when a trunk lid is over-stroked to a lower side. <P>SOLUTION: The retainer 40 mounted to a lower back panel 30 and retaining the bumper 10 includes a mounting part 70 for retaining an upper part of the bumper such that the upper part of the bumper 10 approaches to a lid distal end part 20A below the lid distal end part 20A at closure of the trunk lid, and the mounting part 70 has cushion function. The mounting part 70 has: a lower plate part 71; an upper plate part 72 arranged on an upper side of the lower plate part 71 so as to be opposed to the lower plate part 71; and a plurality of ribs 73 provided between the lower plate part 71 and the upper plate part 72 with a distance in a vehicle width direction. The ribs 73 are formed deflectably relative to load from the upper side. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a structure of a rear part of an automobile, and more particularly to a structure of a retainer that supports a bumper.

FIG. 5 is a cross-sectional view of a conventional vehicle rear structure 100, where 101 is a bumper, 102 is a trunk lid, and 103 is a lower back panel.
The bumper 101 is attached to the lower back panel 103 via the attachment bracket 104. The upper portion of the bumper 101 is attached to the mounting bracket 104 so that the upper portion of the bumper 101 is close to the lid distal end portion 102A below the lid distal end portion 102A when the trunk lid is closed.

  The mounting bracket 104 has an L-shaped cross section as shown in the figure, and the upper portion of the bumper 101 is fixed to the horizontal portion 104A with bolts, nut fastening means (not shown) or an adhesive. Further, the vertical wall portion 104B constituting the mounting bracket 104 is also fixed to the lower back panel 103 by bolts and nuts fastening means or the like (not shown).

  In order to increase the rigidity of the lower back panel 103, a reinforcement 105 is joined to the lower back panel 103. A weather strip 106 is attached to the flange where the lower back panel 103 and the reinforcement 105 are joined.

When the trunk lid is closed, the weather strip 106 elastically contacts the inner panel 102 </ b> B constituting the trunk lid 102. The lower edge portion of the outer panel 102C is hemmed to the lower edge portion of the inner panel 102B to form a flange portion. This flange portion forms the above-described lid tip portion 102A.
When the trunk lid is closed, the gap between the lid tip 102A and the upper part of the bumper 101 is set to be a predetermined distance D [mm].

Patent Document 1 discloses a vehicle rear structure in which a bumper is fixed to a lower back panel via a retainer.
JP 09-011823 (paragraph [0002], FIG. 5)

  In the conventional vehicle rear structure, as shown by a chain line in FIG. 5, when the trunk lid 102 overstrokes downward, if an object is sandwiched between the lid tip 102A and the upper portion of the bumper 101, the trunk lid 102 is Since the object is pressed against the bracket 104, the object may be damaged or the object may be damaged if the load is very large.

  The present invention has been created in view of the above points, and when the trunk lid overstrokes downward, even if an object is sandwiched between the top end of the lid and the upper end of the bumper, the object is damaged. It is an object of the present invention to provide a bumper retainer and a vehicle rear structure including the bumper retainer, which can prevent an object from being damaged.

In order to achieve the above object, the present invention is a retainer that is attached to a lower back panel and supports a bumper, and when the trunk lid is closed, the upper portion of the bumper is close to the lid tip portion below the lid tip portion. The upper part of a bumper has an attachment part to which it is attached, and this attachment part consists of the structure which has a cushion function.
The bumper retainer of the present invention has, for example, a lower plate portion, an upper plate portion disposed on the upper side of the lower plate portion so as to face the lower plate portion, a lower plate portion, and an upper plate portion. And a plurality of ribs provided at a distance in the vehicle width direction, and these ribs are formed so as to be capable of bending with respect to a load from above.
In the bumper retainer of the present invention, preferably, the rib is formed in a rectangular shape with an intermediate portion shifted from the upper and lower ends in the vehicle width direction. In the present invention, the “shaped shape” is used in a concept including both the “shaped” shape and the reversed “shaped” shape. However, the number of the bent portions is not limited to one, but a zigzag shape. You may have a some bending part.

  In order to achieve the above object, the present invention provides a vehicle rear portion in which a bumper is attached to a retainer fixed to a lower back panel so that an upper portion of the bumper is close to the lid tip portion below the lid tip portion when the trunk lid is closed. The structure is characterized by including the retainer described above.

  According to the present invention, when the trunk lid is closed, even if an object is sandwiched in the gap between the lid tip and the upper part of the bumper cover, the thickness of the mounting portion is deformed to act as a cushion, thereby acting on the object. The load can be absorbed. Thereby, the load added to a thing can be reduced and it can prevent getting a crack. In addition, when the load is large, it is possible to prevent the possibility of the object being damaged. Therefore, even if a finger or the like is caught, strong pressure is not received.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the figure, Fr indicates the front of the vehicle, Up indicates the upper side of the vehicle, and LH indicates the left side in the width direction of the vehicle.

  FIG. 1 is a cross-sectional view of a vehicle rear structure 1 according to an embodiment of the present invention, in which 10 is a bumper, 20 is a trunk lid, 30 is a lower back panel, and 40 is a retainer.

  The bumper 10 is made of, for example, urethane resin, and an upper portion thereof is, as illustrated, sequentially from the rear, the first inclined portion 11 and the upper end of the first inclined portion 11 from the first inclined portion toward the vehicle front side. The second inclined portion 12 that is gently inclined, the fixed portion 13 that extends horizontally from the upper end of the second inclined portion 12 toward the front of the vehicle, and the upper portion protrudes obliquely upward from the middle portion of the fixed portion 13. And a protrusion 14.

  The bumper 10 is attached to the lower back panel 30 via a retainer 40. As shown in FIG. 1, when the trunk lid is closed, the fixing portion 13 of the bumper 10 is held by the retainer 40 so that the upper portion of the bumper 10 below the lid tip portion 20A, particularly the fixing portion 13 is close to the lid tip portion 20A. Has been.

  The trunk lid 20 is configured by joining the peripheral edges of the inner panel 21 and the outer panel 22 with urethane-based adhesive. In the illustrated example, the lower edge of the outer panel 22 is hemmed to the lower edge of the inner panel 21. Connected to form a flange. This flange portion forms the lid tip portion 20A.

  The lower back panel 30 is disposed so as to extend in the vehicle width direction with its surface facing the rear of the vehicle, and the reinforcement 50 defines a closed cross section on the vehicle front side of the lower back panel 30 so as to increase rigidity. Are joined together. A vertical wall 41 of the retainer 40 is fixed to a surface of the lower back panel 30 facing the rear of the vehicle by fastening means such as bolts and nuts although not shown.

  A weather strip 60 is attached to the flange portion where the lower back panel 30 and the reinforcement 50 are joined. When the trunk lid is closed, the weather strip 60 elastically contacts the inner panel 21 constituting the trunk lid 20 as shown in the figure.

Furthermore, the vehicle rear portion structure 1 according to the present embodiment is characterized in that the retainer 40 is configured as follows.
The retainer 40 has an attachment portion 70 at the upper end portion of the vertical wall portion 41 attached to the lower back panel 30, and the attachment portion 70 has a cushion function.
The attachment portion 70 holds the upper portion of the bumper so that the upper portion of the bumper 10 is close to the lid distal end portion 20A below the lid distal end portion 20A when the trunk lid is closed. The thickness is reduced when a load greater than or equal to is applied from above, and when the load is released from the load, the thickness is restored to a predetermined thickness.

  FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1, and the attachment portion 70 is opposed to the lower plate portion 71 and a lower plate portion 71 that extends in a substantially horizontal shape with the vehicle width direction as a longitudinal direction. The upper plate portion 72 disposed on the upper side of the lower plate portion 71, and a plurality of ribs 73 provided at a distance in the vehicle width direction between the lower plate portion 71 and the upper plate portion 72. .

  As shown in FIG. 2, the plurality of ribs 73 have a shape obtained by bending a thin plate, and are formed in a square shape when viewed from the front. Specifically, focusing on the rib 73 surrounded by a chain line circle C in FIG. 2, the rib 73 is formed so that the intermediate portion in the height direction is formed to be shifted to the left in the vehicle width direction from the upper and lower ends. A thin lower piece 73A protruding obliquely upward from the upper surface of the plate portion 71, and a thin upper piece portion 73B protruding obliquely downward from the lower surface of the upper plate portion 72 toward the upper end of the lower piece portion 73A, The ends of both pieces are connected to form a “<” shape as a whole.

  In FIG. 2, an alternate long and short dash line X is an imaginary line extending in the vertical direction at an intermediate position in the vehicle width direction, and the rib 73 on the left side of the imaginary line is bent so that the intermediate portion protrudes to the left in the vehicle width direction. The rib 73 on the right side of the imaginary line is shaped like a letter, and the middle part is bent so that it protrudes to the right in the vehicle width direction. In other words, the letter "K" is symmetrical with respect to the vertical line. Presents a morphological form. In this specification, the character shape of “<” and the shape of “<” in the opposite direction is collectively referred to as “character shape”, but it is curved in an arc shape or has a plurality of bent portions. Also good.

As described above, the rib 73 is formed to be bent or curved into a square shape, so that when a desired force acts downward through the upper plate portion 72, the rib 73 can be bent due to elasticity. That is, in a normal time when a downward load is not applied to the mounting portion 70, if the angle formed by the lower piece 73A and the upper piece 73B is θ1 (see FIG. 2), a force greater than a predetermined magnitude When acted, the rib 73 bends so that the angle formed by the lower piece 73A and the upper piece 73B is θ2 (θ2 <θ1: see FIG. 4 described later).
Here, the load F when the rib 73 with the cushion function is deformed is, for example, a load acting on the mounting portion 70 due to the weight of the bumper 10, and an object is placed in the gap between the lid tip 20A and the upper portion of the bumper cover. It is desirable that F1 <F <F2 where F2 is a load that damages an object by weight when sandwiched.

  When the trunk lid is closed, the gap between the lid tip 20A and the upper end of the bumper 10 is set to a [mm], and when the trunk lid 20 is overstroked (the trunk lid 20 in FIG. The gap indicated by a chain line is set to b [mm] (where b <a).

  The fixing portion 13 of the bumper 10 is fixed to the upper surface of the mounting portion 70 configured as described above, specifically, to the upper surface of the upper plate portion 72 by fastening means of screws or nuts or an adhesive.

  The vehicle rear structure 1 according to the present embodiment is configured as described above, and when the trunk lid is closed, an object is sandwiched in the gap S between the lid tip 20A and the upper part of the bumper 10, for example, the thickness t of the object Is larger than the normal gap a [mm], the tip of the trunk lid 20 presses the object against the mounting portion 70. At that time, when the force F acting on the attachment portion 70 is larger than F1 <F <F2, the attachment portion 70 is deformed. That is, as shown in FIG. 3 and FIG. 4, the rib 73 constituting the attachment portion is bent so that the angle formed by the lower piece 73A and the upper piece 73B is θ2 (θ2 <θ1). . As a result, as shown in FIG. 3, the thickness of the attachment portion 70 changes from the normal thickness t1 to t2 (t2 <t1), and becomes thinner. After absorbing the load, the deformed rib 73 is restored to its original state, that is, from the form shown in FIG. 3 to the form shown in FIG. 2 by its elasticity.

  Thus, according to the vehicle rear portion structure 1 according to the embodiment of the present invention, the thickness of the attachment portion 70 can be obtained even when an object is sandwiched in the gap between the lid tip portion 20A and the upper portion of the bumper cover when the trunk lid is closed. By deforming and acting as a cushion, a load acting on the object can be absorbed. Thereby, the load added to a thing can be reduced and it can prevent getting a crack. In addition, when the load is large, it is possible to prevent the possibility of the object being damaged.

  In the vehicle rear structure 1 of the present embodiment, the retainer 40 disposed in the gap between the trunk lid 20 and the bumper 10 can control the load from the trunk lid 20 while maintaining a good appearance.

  When the mounting portion 70 is deformed, the plurality of ribs 73 arranged on the mounting portion 70 are not only those of a “<” shape with the intermediate portion protruding to the left side of the vehicle width, but also the intermediate portion to the right side of the vehicle width. Since the protruding inverted “<” shape is combined and disposed, the upper plate portion 72 of the attachment portion 70 moves relative to the lower plate portion 71 to one side in the vehicle width direction. Can be regulated.

Although detailed above, the present invention can be implemented in various forms without departing from the spirit of the present invention.
The dimensions and angles of the ribs are not limited to those shown in the drawings, and it is a matter of course that the amount of deflection with respect to the load can be finely adjusted by changing the thickness, height, and angle. For example, each rib may have a lower side longer than the upper piece or vice versa.
In the above-described embodiment, the case where the retainer is made of resin is exemplified, but the material is not limited to resin, and elastic rubber may be used as the material.

It is sectional drawing of the vehicle rear part structure which concerns on embodiment of this invention. It is the sectional view on the AA line of FIG. It is sectional drawing at the time of a deformation | transformation of the vehicle rear part structure of FIG. It is the BB sectional view taken on the line of FIG. It is sectional drawing of the conventional vehicle rear part structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle rear part structure 10 Bumper 11 1st inclination part 12 2nd inclination part 13 Attachment part 14 Protrusion part 20 Trunk lid 20A Lid front-end | tip part 21 Inner panel 22 Outer panel 30 Lower back panel 40 Retainer 41 Vertical wall part 50 Reinforce 60 Weather strip 70 mounting portion 71 lower plate portion 72 upper plate portion 73 rib 73A lower piece portion 73B upper piece portion

Claims (6)

A retainer that is attached to the lower back panel and supports the bumper,
When the trunk lid is closed, it has a mounting part to which the upper part of the bumper is attached so that the upper part of the bumper is close to the leading end part of the lid below the leading end part of the lid,
A bumper retainer in which the mounting portion has a cushion function. The mounting portion includes a lower plate portion, an upper plate portion disposed on the upper side of the lower plate portion so as to face the lower plate portion, and a vehicle width direction between the lower plate portion and the upper plate portion. A plurality of ribs provided at a distance from each other,
The bumper retainer according to claim 1, wherein the rib is formed so as to be capable of bending with respect to a load from above.   The bumper retainer according to claim 2, wherein the rib is formed in a square shape with an intermediate portion shifted in the vehicle width direction from the upper and lower ends. The rear structure of the vehicle is supported by a retainer fixed to the lower back panel so that the upper part of the bumper is close to the front end of the lid below the front end of the lid when the trunk lid is closed,
The retainer has a mounting portion for attaching the upper portion of the bumper;
A vehicle rear structure in which the mounting portion has a cushion function. The mounting portion includes a lower plate portion, an upper plate portion disposed on the upper side of the lower plate portion so as to face the lower plate portion, and a vehicle width direction between the lower plate portion and the upper plate portion. A plurality of ribs provided at a distance from each other,
The vehicle rear portion structure according to claim 4, wherein the rib is formed so as to be capable of bending with respect to a load from above.   The vehicle rear structure according to claim 5, wherein the rib is formed in a square shape with an intermediate portion shifted in the vehicle width direction from the upper and lower ends.