JPS6033151A - Bumper stay - Google Patents

Abstract

PURPOSE:To make a stay lightweight as well as to reduce the number of manufacturing processes, by making up a symmetrical-form member in a way of cutting in halves a light alloy-make shape material whose hollow part is divided into sections with each partition wall, while utilizing this partition wall for setting to a car frame. CONSTITUTION:A stay 5 is manufactured with a lightweight alloy-make shape material 8, while this shape material 8 is formed into a square section and provided with each partition wall 10 which divides its hollow part 8 into several chambers. In addition, at angular parts of both side walls 11 and the square part of the shape material 8, each screw groove 12 extending in a longitudinal direction is formed. The shape material 8 is cut off as long as length of the stay 5 at a right angle to the longitudinal direction. This cut shape material is cut in halves so as to become oblique and symmetrical form and therefore two stays 5 are obtained from each shape material being cut. With a top wall 5' of a car frame 15 and the stay 5 both clamped with a bolt 16 and a nut 17, the stay 5 is set to the car frame 15. At this time the bolt 16 is made to be screwed in the partition wall 10 whereby setting strength is improved.

Description

[Detailed description of the invention] The present invention relates to a bumper stay.

The bumper stay is interposed between a reinforcing member and a vehicle frame in order to fix the reinforcing member provided with a bumper such as urethane foam to the vehicle frame.

As shown in FIG. 1, in the conventional stay, a mounting piece 2 for attaching to a reinforcing member is provided in front of a reverse channel-shaped base 1, and a reinforcing body 3 of approximately the same shape that closes the lower opening of the base 1 is welded. The structure is as follows. Plate 4 is attached to the mounting surface to the vehicle frame.
are welded to provide surface reinforcement. The conventional stay is manufactured using a process in which a steel plate is pressed and then attached by welding.

The stay made in this manner is heavy because it is made of steel, and requires press working and welding, which requires a large number of man-hours. In addition, press molds for steel are expensive, and stays become expensive when manufactured in small quantities.

This invention aims to solve the above-mentioned problems of the conventional technology by focusing on the good extrusion and drawing process of light alloys such as aluminum alloy materials and providing a lightweight stay.
Basically, a technical means is used in which a light alloy molded material whose hollow part is partitioned by partition walls is divided in the longitudinal direction to create symmetrical members, which are then used as stays. According to this invention, a symmetrical stay can be manufactured by cutting a light alloy shape material that is easy to extrude or draw at right angles to the longitudinal direction and then dividing it in the longitudinal direction. Since it can be used for installation, sufficient installation strength can be ensured.

Embodiments of the invention will be described with reference to the accompanying drawings.

The stay 5 includes a bumper body 6 made of urethane foam or the like.
It is bolted to a reinforcing member 7 fixed to the vehicle frame, and is also bolted to the vehicle frame (see FIG. 2 β).

The stay 5 is manufactured from a molded material 8 that is extruded or drawn from a light alloy such as an aluminum alloy. As shown in FIG. 3, the molded material 8 has a rectangular cross section and has partition walls 10 that partition the hollow portion 9 into several sections. Screw grooves 12 extending in the longitudinal direction are provided in both side walls 11 and the corners of the rectangular portion. Such a shape material 8 is cut at right angles to its longitudinal direction to the length of the stay. Each cut shape material is divided diagonally and symmetrically, and two stays 5 are taken from each cut shape material.

Attachment of the thus formed stay 5 to the reinforcing member 7 is as follows:
As shown in FIG. 4, from the front of the reinforcing member 8, the reinforcing member 8 is
This is accomplished by screwing the bolt 13 into the thread groove 12 of the stay 5 through the screw. When the side surface of the reinforcing member 8 on the stay side is a curved surface, it is preferable to use a spacer 14 having a shape that matches the side surface and the end surface of the stay 5.

The spacer 14 can also be easily manufactured like the stay 5 by extrusion or drawing.

The stay 50 is attached to the vehicle frame 15 by tightening the vehicle frame 15 and the top wall of the stay 5 with bolts 16 and nuts 17, as shown in FIG.

The strength of the stay is improved by threading the threaded portion of the bolt 16 into the partition wall 10 of the stay 5. As shown in Figure 6,
It is preferable to form an upward protrusion 1B on the partition wall 10 to prevent the nut 17 from turning.

The profile shown in FIG. 3 has two partition walls 10 spaced apart from each other, but three partition walls 10 may be used as shown in FIG. 7, and the number can be arbitrarily selected. The shape material is also cut diagonally in the longitudinal direction to form two symmetrical stays 5.

As shown in FIG. 8, a screw groove 19 is provided on the side wall of the mold material,
You can also cut and remove the center part and use it for wiring or piping.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a conventional stay, Fig. 2 is a perspective view showing how the stay of the present invention is attached, Fig. 3 is a perspective view of a mold material for making the stay, and Fig. 4 is another example of how the stay is attached. FIG. 5 is a cross-sectional view showing an example of how the stay and the vehicle frame are attached, FIG. 6 is a cross-sectional view of the stay provided with a nut rotation stopper, and FIG. 7 is a perspective view of a different shaped member. FIG. 8 is a perspective view of another example of the mold material. In the figure: 5... Stay, 8... Shape material, 10... Partition wall, 12... Screw groove. Agent Patent Attorney Hideaki Kuwahara

Claims (1)

[Claims] A bumper stay characterized in that a profiled material having a partition wall that partitions a hollow part into a classroom is cut in the longitudinal direction to form symmetrical wings, and the partition wall is used for attachment to a vehicle frame.