JPH0591999U - Resin molded products for vehicles - Google Patents

Abstract

(57) [Summary] [Purpose] When a fastening portion to the vehicle body is provided at a vehicle body facing portion that extends by bending from the tip of the edge portion of the molded article body, between the edge portion and the vehicle body facing portion. The sink mark generated in the formed bending portion prevents the sense of continuity between the vehicle resin molded product and the vehicle from being impaired. [Structure] A rib 16 is provided on the back surface of the rounded portion 14 in the molded product body 10 in which the upper end portion 12 is bent at the rounded portion 14 so as to face the vehicle body side so as to project toward the vehicle body. At the tip of the rib 16, the vehicle body facing portion 1 extends so as to extend to the vicinity of the back surface of the upper end edge portion 12 of the molded product body 10.
8 are provided. The main body 1 of the molded product is provided in the body facing portion 18.
A mounting hole 26 for inserting a fastening bolt for fastening 0 to the vehicle body is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a resin molded product for a vehicle, such as a bumper for a vehicle, which is mounted on a vehicle body.

[0002]

[Prior Art]

 As the above-mentioned resin molded article for a vehicle, as disclosed in Japanese Utility Model Laid-Open No. 2-54755, the molded article body is bent at the rounded portion so that the edge portion faces the vehicle body, and It is known that a body facing portion that is bent and extends inward of a molded body is provided, and a fastening portion for fastening the molded body to the vehicle body is provided at the body facing portion.

[0003]

[Problems to be solved by the device]

 By the way, in the above-mentioned resin molded article for vehicle, since the vehicle body facing portion that extends by being bent inward of the molded article body is provided at the tip of the edge portion of the molded article body, the edge portion and the vehicle body facing portion are opposed to each other. A refraction part will be formed between the parts. Since the refraction part in a resin molded product for vehicles is usually thicker than other parts, for example, the vehicle body facing part, the cooling speed is slower than that of the vehicle body facing part. A sink mark may be generated in the vicinity of the bent portion.

In the above resin molded article for vehicle, a fastening portion for fastening the molded article body to the vehicle body is formed at a vehicle body facing portion that extends by bending from the tip of the edge portion of the molded article body. However, since the vehicle resin molded product is incorporated in the vehicle body with the refraction portion being close to the vehicle body, there is a problem that the sink mark generated in the refraction portion impairs the continuity between the vehicle resin molded product and the vehicle. is there.

In view of the above, the present invention provides a resin molding for a vehicle due to a sink generated in a bending portion formed between a tip of an edge portion of a molded article body and a vehicle body facing portion that extends by bending from the tip. The purpose is to prevent a situation in which the sense of continuity between the product and the vehicle is impaired.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention makes the rib protrude toward the vehicle body from the rounded portion which is less likely to cause a sink mark and is less noticeable even if the sink mark occurs because the bend is gentler than the bending portion. The vehicle body facing portion is provided so as to extend from the tip of the rib to the vicinity of the end edge portion of the molded article body, and the vehicle body facing portion is formed with a fastening portion to the vehicle body.

Specifically, a solution means taken by the present invention is a molded resin body for a vehicle, the molded resin body being bent at a rounded portion so that an edge portion thereof faces the vehicle body, and the rounded portion in the molded body. A rib provided so as to project to the vehicle body side on the back surface of the molded article, and a vehicle body facing portion provided at the tip of the rib so as to extend to the vicinity of the back surface of the end edge portion of the molded article body facing the vehicle body. A fastening portion for fastening the molded article body to the vehicle body is formed in the vehicle body facing portion.

[0008]

[Action]

 With the above configuration, the rounded portion of the molded product body is not so thick as to other portions, for example, ribs protruding from the rounded portion, so that the cooling rate of the rounded portion is not slower than that of the rib. .. Therefore, even if contraction stress occurs in the ribs during cooling, the rounded portion is almost cooled by the time the contraction stress occurs in the ribs. I do not receive much.

Further, even if a sink mark occurs in the rounded portion, it is inconspicuous and the sense of continuity between the vehicle resin molded product and the vehicle body is not impaired.

[0010]

【Example】

 The resin molded article for a vehicle according to the present invention is not limited to the vehicle bumper, but the vehicle bumper will be described in the following embodiments.

FIG. 1 is a perspective view of a part of the rear surface of a vehicle bumper A according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line II-II in FIG. 1, and FIG. 3 is a sectional view taken along line III-III in FIG. 4 and 5 are perspective views of a front portion of a vehicle body B to which the vehicle bumper A is attached.

As shown in FIGS. 1 to 3, a molded product body 10 composed of a bumper face body of a vehicle bumper A is bent at a rounded portion 14 so that an upper end edge portion 12 thereof faces the vehicle body side. There is.

Plate-shaped ribs 16, 16 are integrally provided on the rear surface of the rounded portion 14 with the molded product main body 10 so as to project toward the vehicle body B side at appropriate intervals. Plate-shaped vehicle body facing portions 18 and 18 are integrally provided with the rib 16 so as to bend upward from the tips of the ribs 16 and extend to the vicinity of the rear surface of the upper end edge portion 12 of the molded product body 10. A slight gap 20 or 20 is formed between the tip portion 18a of the portion 18 and the upper end edge portion 12.

A strip-shaped vertical wall 22 that curves in the up-down direction along the upper end edge portion 12 is provided between the front end portions 18 a of the vehicle body facing portion 18, and the vertical wall 22 and the upper end edge portion are provided. 12 are connected to each other by a connecting portion 24 provided at a location where the vehicle body facing portion 18 is not provided.

Mounting holes 26, 26 serving as fastening portions for fastening the molded product body 10 to the vehicle body B are provided at substantially the center of each vehicle body facing portion 18, and the molded product body 10 is attached to the mounting hole 26. It is assembled to the vehicle body B by the fastening bolts 28 that have been inserted and the nuts 30 that are previously attached to the back surface of the vehicle body facing portion 18.

As described above, since the gap 20 is formed between the tip end portion 18 a of the vehicle body facing portion 18 and the upper end edge portion 12, the contracting stress generated in the vehicle body facing portion 18 causes the upper end edge portion 18 a. No twelve.

Further, since the rounded portion 14 provided with the plate-shaped rib 16 does not have a thickness much larger than other portions of the molded product body 10, for example, the rib 16, the cooling rate of the rounded portion 14 is different. Not too slow compared to the cooling rate of the part. Therefore, the rounded portion 14 is substantially cooled when the contraction stress is generated in the rib 16. For this reason, the shrinkage stress generated in the ribs 16 is difficult to be transmitted to the rounded portions 14, so sink marks are unlikely to occur in the rounded portions 16, and even if sink marks occur, the depth of the sink marks is shallow.

Further, even if a shallow sink mark is generated in the rounded portion 16, the sinker is hardly noticeable in the rounded portion and the sense of continuity between the vehicle bumper A and the vehicle body B is not impaired.

Further, when an external force as shown by the arrow in FIG. 2 is applied to the upper end edge portion 12, a gap 20 exists between the upper end edge portion 12 and the tip end portion 18 a of the vehicle body facing portion 18. Therefore, the upper edge 12 bends toward the vehicle body-facing portion 18, but the gap 20 is not so large that the back surface of the upper edge 12 is the tip of the vehicle body-facing portion 18, as indicated by the chain double-dashed line. Deflection of the upper edge portion 12 stops in the state of contacting the portion 18a. Therefore, the deformation of the upper edge portion 12 is small.

Further, although there is a gap 20 between the upper edge portion 12 and the vehicle body facing portion 18 as described above, the vertical wall 22 and the upper edge portion that are provided between the vehicle body facing portions 18 are provided. Since it is connected to 12 by the connecting portion 24, the rigidity of the vehicle body facing portion 18 does not decrease.

[0021]

[Effect of the device]

 As described above, according to the resin molded article for a vehicle of the present invention, the vehicle body side is projected to the rear surface of the rounded portion of the molded article body in which the edge portion is bent at the rounded portion so as to face the vehicle side. Since the ribs are provided and the cooling rate of the rounded portion is not slower than the cooling rate of other parts, for example, the ribs, even if shrinkage stress occurs during cooling of the ribs, the rounded portion shrinks in the ribs. Since it is hardly affected by stress, sink marks are unlikely to occur in the arm part.

Further, a vehicle body facing portion is provided at the tip of the rib protruding from the back surface of the rounded portion so as to extend to the vicinity of the back surface of the end edge portion of the molded product body, and the molded product body is fastened to the vehicle body at the vehicle body facing portion. Since the fastening portion is provided, even if a sink mark occurs in the rounded portion, it is not noticeable, and the sense of continuity between the vehicle resin molded product and the vehicle body is not impaired.

[Brief description of drawings]

FIG. 1 is a perspective view of a part of a back surface of a vehicle bumper according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a perspective view of a front portion of a vehicle body to which a vehicle bumper according to an embodiment of the present invention is attached.

[Explanation of symbols]

 A vehicle bumper B vehicle body 10 molded article body 12 upper end edge portion (end edge portion) 14 round portion 16 rib 18 vehicle body facing portion 26 mounting hole (fastening portion)

Claims (1)

[Scope of utility model registration request] 1. A molded article body having an end portion bent at a rounded portion so as to face the vehicle body side, a rib provided on the back surface of the rounded portion of the molded article body so as to project toward the vehicle body side, The ribs are provided with a vehicle body facing portion that faces the vehicle body and extends to near the back surface of the end edge portion of the molded product body, and the fastening for fastening the molded product body to the vehicle body at the vehicle body facing portion. A molded resin product for vehicles, characterized in that a portion is formed.