JP2001151049A - Bumper structure and its manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bumper structure and its manufacturing method for simply manufacturing bumpers for a wide-width cab and a normal-width cab without providing different parts. SOLUTION: A wide-width bumper is constituted by integral pressing, a joggle and a locating hole for normal-width assembly are provided on a center portion of this bumper, and it is cut by a cutting jig or a press die.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bumper structure for a vehicle having a plurality of types of width dimensions, for example, a bumper structure for a vehicle having two types of cabs, such as a wide width and a parallel width (for example, a truck), and a method of manufacturing the same. About.

[0002]

2. Description of the Related Art Conventionally, in a front bumper having two types of cab widths, press molding is performed integrally by using different molds, or a bumper for a parallel width is integrally formed, and a bumper for a wide width is used for a wide bumper. It is known that a bumper is cut, and an extension obtained by adding a welding allowance to a difference dimension is connected and used.

[0003] However, in the above-mentioned technology, it is good if the width is small, but if the width is increased, the extension is a separate part and the number of connection points becomes two. There is a problem that it becomes troublesome and troublesome work.

As other conventional techniques, for example, the techniques disclosed in JP-A-9-104298 and JP-A-11-1149 are disclosed, but none of them solves the problem of the present application.

[0005]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above-mentioned problems of the prior art, and has a simple structure, a plurality of types of bumpers which can be manufactured by one jig, and a manufacturing method thereof. It is intended to provide.

[0006]

SUMMARY OF THE INVENTION A bumper structure for a vehicle according to the present invention is a bumper structure for a vehicle having a plurality of types of width dimensions (for example, a bumper structure for a wide width of a vehicle such as a truck having two types, a wide width and a parallel width). ), The width of the bumper (for example, a so-called “wide bumper”), which is relatively large in width and is formed by pressing integrally, has a dimensional difference between the widths (for example, a dimensional difference between a wide width and a parallel width). A pair of jocks having equal intervals are provided at right angles to the longitudinal direction,
First and second locating holes are provided at predetermined positions corresponding to the dimensional difference from the center of the bumper toward both sides in the longitudinal direction (for example, の of the dimensional difference from the center of the bumper to both sides in the longitudinal direction). The third locator is provided at a position away from the second locating hole by a predetermined distance in proportion to the dimensional difference (for example, a position outside the second locating hole at a half of the dimensional difference). Holes are provided.

Alternatively, a bumper having a relatively large width (for example, a so-called “wide bumper”) is cut at a central portion (a central portion or a portion in the vicinity thereof) and a jockle base portion on a third locate hole side to form a first locate. Preferably, the holes and the third locate holes are connected so as to match.

On the other hand, the bumper manufacturing method of the present invention is applied to a bumper of an automobile having a plurality of types of width dimensions (for example, a bumper of an automobile such as a truck having two types, a wide width and a parallel width).
In the manufacturing method of (1), a pair of bumpers each having a distance equal to the dimensional difference of the width dimension (for example, the dimensional difference between the wide width and the parallel width) is provided at the center of a bumper having a relatively large width dimension (for example, a so-called “wide bumper”). A jockle is formed at a right angle to the longitudinal direction, and a predetermined position (for example, 1 of the dimensional difference) corresponding to the dimensional difference from the center of the bumper toward both sides in the longitudinal direction.
The first and second locating holes are formed at (/ 4) positions, and are separated from the outside of the second locating holes by a predetermined distance proportional to the dimensional difference (for example, 1/2 of the dimensional difference).
(A position) is press-molded integrally so as to form a third locate hole.

Alternatively, a bumper manufacturing process for press-forming a bumper having a relatively large width direction dimension (for example, a difference between a wide width and a parallel width), and a bumper manufactured by the manufacturing process is inserted into a center portion and a third locating hole. It is preferable to have a cutting step of cutting with the side jockle base, and an assembling step of spot welding with the first and third locate holes inserted into the assembling jig.

According to the present invention having such a configuration, a bumper having a relatively large width direction (a bumper for a wide width) is manufactured from a bumper having a relatively large width direction (a bumper for a wide width). However, even if the quantity increases, the problems of cost increase and man-hour increase do not occur. Further, when manufacturing a bumper for a wide width from a bumper for a wide width, separate parts such as an extension of the prior art are not required, and since only one connecting point is required, the number of parts management points does not increase, and The workability is greatly improved because the number is reduced, and in particular the welding work requiring a great deal of labor is reduced.

[0011]

FIG. 1 is a front view of a wide bumper 1 according to the present invention. A first locate hole 2 and a second locate hole 3 are provided on both sides of a center line 5 of the bumper. Are provided on a straight line in the longitudinal direction, and a third locating hole 4 is provided outside the second locating hole 3. Jockle 6 for the thickness of the bumper at intervals of 2a,
7 (see FIG. 2). In addition, the hatched part has shown the cut-off part at the time of manufacturing for a parallel width.

FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1, and a first locate hole 2 is provided on the right side of a line 5 at the center of the bumper 1 in parallel with the wide cab from the line 5 at the center. When the difference between the width and the width of the cab is 2a, the hole is pierced around a point separated by 1 / 2a, which is half of the dimension a, and similarly, the second locating is performed around a point separated by 1 / 2a to the left. Hole 3 is drilled. Further, a third locate hole 4 is formed at a position further leftward from the second locate hole 3 by a.

Hereinafter, a method of manufacturing the bumper 11 for a parallel width (see FIG. 3) using the bumper 1 for a wide width will be described. First, the center line 5 and the base 7a of the jock 7 on the side having the third locate hole are cut by attaching the third locate hole 4 to a cutting jig (not shown). Alternatively, it is cut by a press die.

Referring to FIG. 4 which is a cross-sectional view taken along the line BB of FIG. 3, first, the third locate hole 4 of the cut left bumper 1b is inserted into an assembling tool (not shown), and then the right bumper 1a is inserted. If the first locate hole 2 is overlapped and inserted and spot welding 12 is performed at a plurality of locations as shown in FIG.
Both ends are dimensional difference 2a between wide cab and normal cab respectively
The bumper 11 for a parallel width shorter by a, which is a half of the above, can be assembled.

The third locating hole 4 may be provided on the right outside of the first locating hole 2 and may be cut from the base of the right jogdle 6.

Although the illustrated embodiment has been described with reference to a truck, it is noted that the present invention can be similarly applied to a bus.

[0017]

The present invention is configured as described above,
The following excellent effects can be obtained. (1) Since the bumper for a wide cab having a large size is integrally formed, the strength is greater than that of a conventional bumper for a wide cab manufactured by welding. (2) Since the bumper for short parallel width is also manufactured by only one welding, it is advantageous in strength and has good productivity. (3) Since there are no special parts such as extensions,
The number of parts is reduced, and the manufacturing cost is low.

[Brief description of the drawings]

FIG. 1 is a front view of a wide bumper showing one embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a diagram illustrating a difference in length in a front view of the bumper for parallel width.

FIG. 4 is a sectional view taken along line BB of FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Wide bumper 2 ... 1st locate hole 3 ... 2nd locate hole 4 ... 3rd locate hole 5 ... Center line 11 ... Normal width bumper

Claims (4)

[Claims] 1. A bumper structure for an automobile having a plurality of types of width dimensions, wherein a pair of bumpers having a width dimension relatively large and having a distance equal to the dimension difference of the width dimensions are provided at a central portion of the bumper formed by integral press molding. Are provided at right angles to the longitudinal direction, and first and second locate holes are provided at predetermined positions corresponding to the dimensional difference from the center of the bumper toward both sides in the longitudinal direction, and outside the second locate hole. A third locating hole is provided at a position separated by a predetermined distance in proportion to the dimensional difference. 2. A bumper having a relatively large width is cut at a center portion of a bumper and a jockle base on a side of a third locate hole, and the first locate hole and the third locate hole are connected so as to coincide with each other. The structure of a bumper according to claim 1. 3. A method of manufacturing a bumper for an automobile having a plurality of types of width dimensions, wherein a pair of jocks having a distance equal to the dimension difference of the width dimension is provided in a central portion of the bumper having a relatively large width dimension in a longitudinal direction. First and second locating holes are formed at right angles to the center of the bumper toward both sides in the longitudinal direction at predetermined positions corresponding to the dimensional difference, and the dimensional difference is formed toward the outside of the second locating hole. 3. A method of manufacturing a bumper, comprising integrally press-forming so as to form a third locating hole at a position separated by a predetermined distance in proportion to. 4. A bumper manufacturing step of press-forming a bumper having a relatively large width direction dimension, and a cutting step of cutting the bumper manufactured by the manufacturing step at a central portion and a jockle base portion on a third locate hole side. And assembling the first and third locate holes by spot welding with the first and third locate holes inserted into an assembling jig.
Manufacturing method of bumper.