JP2001058549A - Bumper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent fillers from falling off an aperture in the hollow part of stay, by occluding at least one part of the first aperture at the first occlusion part. SOLUTION: In a bumper 1 for a vehicle, a part nearer to a front end part of the first aperture at a filled hollow part 24 and a non-filled hollow part of stay 20 is occluded at the first occlusion part 15 of bumper main body 10, and by this impact-absorbing member 29 is prevented from falling off the first aperture. In case of travel of an automobile, the impact-absorbing member 29 tends to move downward due to vibration during the travel, but its movement is regulated by the first occlusion part 15. And as filler filled up in the hollow part of stay 20, an impact-absorbing member made from synthetic resin with a constant shape is used. In this way, a defect of falling down of the impact- absorbing member 29 from the aperture of the frilled hollow part 24 is prevented, and for that reason, the impact at the time of collision is surely absorbed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bumper which is used for automobiles and vehicles and has a stay attached to a bumper body such as a bumper reinforcement.

[0002]

2. Description of the Related Art In automobiles and vehicles, bumpers are provided at the front and rear of the vehicle body for the purpose of absorbing the impact at the time of collision.

FIGS. 6A and 6B show a bumper (100) disposed at the front of a vehicle body (130). The bumper (100) is provided on a rod-shaped bumper body (110) disposed substantially horizontally at a predetermined height at the front of the vehicle body (130), and at the front end of the bumper body (110) and the vehicle body (130). Left and right side members (13
1) Left and right stays interposed between (131) and (120)
(120). The stay (120) is fixed to the rear wall surface (114) at the left and right ends of the bumper body (110) by welding (welded portion W '). The stay (120) is fixed to the side members (131) and (131) by welding (W '), so that the bumper (100) is disposed at the front of the vehicle body (130).

As shown in FIG. 7, the bumper main body (110) is made of a metal extruded shape having a substantially square cross section and has three hollow portions (111), (112) and (113). One of the hollow portions (112) is filled with a shock absorbing member (119) made of synthetic resin as a filler.

On the other hand, the stay (120) is shown in FIG.
As shown in the figure, three hollow portions (124) (125) (126)
It has. Each of the hollow portions (124) penetrates in the vertical direction, and has an opening (124a) directed downward and an opening (124b) directed upward as shown in FIG. I have. In this stay (120), one of these three hollow portions (124) (125) (126) is used.
Each hollow portion (124) is filled with a shock absorbing member (129) made of synthetic resin as a filler.

[0006]

In the conventional bumper (100), as shown in FIG. 7, the hollow portion (124) of the stay (120) is caused by the vibration of the automobile during running.
The filler (129) filled therein moves downward (in the direction of arrow A), and the filler (129) falls off from the downwardly directed opening (124a) in the hollow portion (124). There was a drawback of doing it. Alternatively, if the vibration during driving of the automobile is large, the filler (129)
There is a possibility that the water may jump up and fall off from the upwardly directed opening (124b) in the hollow part (124).

The present invention has been made in view of such a technical background, and an object thereof is to provide a bumper in which a filler filled in a hollow portion of a stay is prevented from dropping from an opening. It is in.

[0008]

According to a first aspect of the present invention, a stay having at least one hollow portion in a bumper body is provided such that an opening of the hollow portion is formed in an upper portion and a lower portion. A bumper having at least one of the hollow portions of the stay filled with a filler, wherein the filler is filled in the bumper body. A first opening corresponding to a first opening directed downward in the filled hollow portion provided, and at least a portion of the first opening in a state where the stay is attached to the bumper main body. Are closed by the first closing portion.

According to this, since at least a part of the first opening is closed by the first closing part, the filler is prevented from falling off from the first opening.

According to a second aspect of the present invention, in the bumper according to the first aspect, the filling hollow portion has a second opening directed upward, and the bumper main body has:
A second closing portion corresponding to the second opening is provided, and in a state where the stay is attached to the bumper main body, at least a part of the second opening is closed by the second closing portion. Is what it is.

[0011] According to this, at least a part of the second opening is closed by the second closing part, so that the second filler is filled.
Dropping from the opening is prevented.

According to a third aspect of the present invention, in the bumper according to the first or second aspect, the stay is made of an extruded profile having at least one hollow portion penetrating in the extrusion axis direction. The openings on both sides in the extrusion axis direction of the portion correspond to the openings.

[0013] According to this, since the stay is manufactured from an extruded section having at least one hollow portion penetrating in the direction of the extrusion axis, the stay is efficiently and cost-effectively manufactured. You.

According to a fourth aspect of the present invention, in the bumper according to any one of the first to third aspects, the bumper main body is made of an extruded shape, and the closing portion is formed by the stay. The protrusion is formed on the side of the vehicle body beyond the attached mounting surface and is formed integrally with the extruded profile of the bumper body at the time of extrusion production and is formed with a ridge extending in the extrusion axis direction.

According to this, the bumper main body is made of an extruded profile, and the closed portion is formed of the above-mentioned ridge, so that the bumper main body having the closed portion is formed. It is manufactured efficiently and cost-effectively. Further, since the ridge protrudes toward the vehicle body, the bending rigidity of the bumper body is improved by the amount of the ridge, and as a result, the shock absorbing characteristics are improved.

In the bumper according to the present invention, the filler filled in the hollow portion of the stay is, for example, a shock absorber made of a synthetic resin having a predetermined shape for absorbing the shock at the time of collision. The members suitably correspond.

The bumper body corresponds to, for example, a rod-shaped bumper reinforcement.

Means for attaching the stay to the bumper body include, for example, fusion welding (MIG, TI
G, laser welding, spot welding, etc.), welding such as friction stir welding, which is a kind of solid-phase welding, or fastening members (rivets, bolts, etc.) are used.

[0019]

Next, embodiments of the present invention will be specifically described with reference to the drawings.

In FIG. 1, (1) is a bumper of this embodiment (first embodiment), which is disposed at the front of a vehicle body (30). (31) (31)
Left and right side members as a vehicle body frame to which the bumper (1) is attached, and are provided at a front end of the vehicle body (30).

As shown in FIG. 1, the bumper (1) has a length substantially equal to the width of the vehicle body, and
A rod-shaped bumper main body (10) disposed substantially horizontally at a predetermined height position of the front of the front member, and the bumper main body (10) when attaching the bumper main body (10) to the side members (31) (31). There are left and right stays (20) (20) interposed between the side members (31) and (31). As shown in FIG. 2, the stays (20) and (20) are fixedly attached to the vehicle body-side wall surfaces at the right and left ends of the bumper body (10), that is, the rear wall surface (14). And this stay (20) (20) is the side member (31) (3
As shown in FIG. 1, the bumper (1) is disposed at the front of the vehicle body (30) by being fixedly attached to (1).

The bumper main body (10) is a rod-shaped bumper reinforcement that is entirely bent in a substantially arc shape, and is covered with an exterior cover (not shown) when attached to the side members (31) and (31). Things.

This bumper main body (10) is made of a metal extruded profile, which is specifically shown in FIG.
As shown in FIG. 4, three hollow portions (11) made of an extruded shape made of aluminum (including the alloy thereof, the same applies hereinafter) having a substantially square cross section and extending in the extrusion axis direction.
It has (12) and (13). In the middle hollow portion (12) of the three hollow portions (11), (12), and (13), a shock absorbing member (19) made of urethane for absorbing a shock at the time of a collision is provided. , And is filled over substantially the entire length of the hollow portion (12). And this bumper body (10)
The three hollow portions (11), (12), and (13) are fixedly attached to the side members (31) and (31) via the stays (20) and (20) in such a manner that they are lined up and down. ing.

As shown in FIG. 4, each of the stays (20) includes a first mounting plate portion (21), a second mounting plate portion (22) substantially opposed to and separated from the first mounting plate portion (21), and both of them. Two ribs (23), (23), (23), (23) connecting the mounting plate portions (21), (22) and arranged at a predetermined interval from each other,
Three ribs (23) (23) and two hollow parts (24) (2
5) and (26).

The stay (20) is made of a metal extruded profile, and more specifically, is made of an aluminum extruded profile. Therefore,
Each of the hollow portions (24), (25), (26) penetrates in the extrusion axis direction, and has openings (24a) (24b) on both sides in the extrusion axis direction, as shown in FIG. Is what it is. In the stay (20), as shown in FIG. 2, the first mounting plate (21) is attached to the rear wall surface (10) of the bumper body (10) so that the direction of the extrusion axis is parallel to the vertical direction. 14) is fixed by welding (welded portion W), and the second mounting plate portion (22) is fixed to the side member (31) by welding (welded portion W). Therefore, when the stay (20) is attached to the bumper body (10), the two openings (24a) (24) of each hollow portion (24) are provided.
One opening (24a) of b) will be directed downward, and the other opening (24b) will be directed upward. Then, as shown in FIG. 4, a block-shaped one for absorbing the impact at the time of collision is provided in one hollow part (24) of the three hollow parts (24), (25) and (26). A shock absorbing member (29) made of urethane is filled.

Here, in the stay (20), the opening (24a) directed downward of each hollow portion (24) is called a first opening, and the opening (24b) directed upward is the first opening. Let us call it two openings. Further, the shock absorbing member (29)
The hollow part (24) filled with is referred to as a filled hollow part, and the hollow part (25) not filled with the shock absorbing member (29)
(26) is called an unfilled hollow portion.

On the other hand, as shown in FIG. 4, the stay (20) is provided at the lower end of the rear wall surface (14) of the bumper body (10).
A closed portion (referred to as a first closed portion, 15) corresponding to the first opening (24a) of the filled hollow portion (24) is provided. Further, the upper end of the rear wall portion (14) of the bumper body (10) is provided with a second hollow portion (24) of the stay (20).
A closing portion (referred to as a second closing portion, 16) corresponding to the opening (24b) is provided.

As shown in the drawing, both the first and second closing portions (15) and (16) are provided on the mounting surface (14a) of the rear wall surface (14) of the bumper body (10) to which the stay (20) is mounted.
) And projecting toward the vehicle body (that is, the rear side) and extending in the extrusion axis direction of the extruded aluminum member constituting the bumper body (10).
These ridges are formed integrally with the aluminum extruded profile constituting the bumper body (10) at the time of extrusion production, and in this embodiment, are integrally formed over the entire length of the aluminum extruded profile. Is formed. The lower surface of the ridge that forms the first closing portion (15) is connected to the bumper body (1).
0) is flush with the lower wall, while the second blockage (1
The ridges constituting 6) are flush with the upper wall surface of the bumper body (10).

In this pumper (1),
The front end of the stay (20) is fitted almost exactly between the first closing part (15) and the second closing part (16) of the bumper body (10), and 1
The mounting plate (21) is the rear wall (14) of the bumper body (10)
Of the stay (2a).
0) is fixedly attached to the bumper body (10).

In this mounted state, as shown in FIG. 3, portions of the filled hollow portion (24) and the non-filled hollow portion of the stay (20) near the front end of the first opening (24a) are connected to the bumper body ( The first opening (24) of the shock absorbing member (29) is closed by the first closing portion (15) of the shock absorbing member (29).
a) is prevented from falling off. In addition, stay (2
0) The second in the filled hollow part (24) and the unfilled hollow part
The portion near the front end of the opening (24b) is closed by the second closing portion (16) of the bumper body (10), so that the second opening (24) of the shock absorbing member (29) is closed. Is prevented from falling off.

In the bumper (1) configured as described above, when the automobile is running, the shock absorbing member (29)
Receives the vibration during traveling and tries to move downward, but the movement is regulated by the first closing portion (15).
Furthermore, when the vibration during traveling is large, the shock absorbing member (29) jumps up and moves upward due to the vibration, but the movement is restricted by the second closing portion (16). . Therefore, in the bumper (1), there is no problem that the shock absorbing member (29) falls off from both the openings (24a) and (24b) of the filling hollow portion (24), and therefore, the impact at the time of the collision can be reduced. It can be reliably absorbed.

Further, according to this embodiment, since the bumper main body (10) is manufactured from an extruded member integrally formed with the ridges forming both the closed portions (15) and (16),
The bumper body (10) having the closing portions (15) and (16) can be manufactured efficiently and cost-effectively. Further, since the bumper body (10) has the two ridges, the bending rigidity is improved by the amount of the two ridges, so that the impact at the time of the collision can be reliably absorbed. I have. Further, since the stay (20) is manufactured from an extruded section, the stay (20) can be manufactured efficiently and cost-effectively. In addition, since both the bumper body (10) and the stay (20) are made of extruded aluminum members, the weight of the bumper (1) is reduced.

Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment.

For example, as shown in FIG.
Using one or more (two in the figure) metal plates, each plate is bent into a desired shape so that hollow portions (24) and (25) are formed, and these are bent as necessary. Welding (weld
W1) or integrated with a fastener (not shown). Further, such a plate material may be made of an iron-based material in addition to aluminum. In the figure, the same reference numerals are given to the same or similar elements as those in the above-described embodiment, and the duplicated description will be omitted.

Although not shown, the filler such as the shock absorbing member (29) is filled in all the hollow portions (2) of the stay (20).
4) (25) (26) may be filled.

Further, the bumper (1) may be provided at the rear of the vehicle body (30).

The cross section of the bumper body (10) may be, for example, a U-shaped, Japanese-character, or K-shaped.

[0038]

As described above, according to the bumper according to the first aspect of the present invention, the stay provided with one or more hollow portions in the bumper main body has the opening portion of the hollow portion in the upper portion and the lower portion. At least one of the hollow portions of the stay is filled with a filler, and the filler is filled in the bumper body. A first opening corresponding to a first opening directed downward in the filled hollow portion, and at least a portion of the first opening is provided when the stay is attached to the bumper body. Since the filler is closed by the first closing portion, it is possible to prevent the filler from dropping out of the first opening.

According to the bumper of the second aspect,
The filling hollow portion has a second opening directed upward, and a second closing portion corresponding to the second opening is provided in the bumper main body, and the stay is provided in the bumper main body. In the attached state, since at least a part of the second opening is closed by the second closing part, it is possible to prevent the filler from dropping out of the second opening.

According to the bumper of the third aspect,
The stay is manufactured from an extruded member having at least one hollow portion penetrating in the extrusion axis direction, and openings on both sides in the extrusion axis direction of the hollow portion correspond to the openings. The stay can be manufactured efficiently and cost-effectively.

According to the bumper of the fourth aspect,
The bumper main body is manufactured from an extruded profile, and the closing portion projects to the vehicle body side from a mounting surface on which the stay is mounted, and is integrated with the extruded profile of the bumper main body at the time of extrusion production. Since it is composed of the formed ridges extending in the direction of the extrusion axis, the bumper main body having the closed portion can be manufactured efficiently and cost-effectively. Further, the bending rigidity of the bumper body is improved by the amount of the ridge, so that excellent shock absorbing characteristics can be exhibited.

[Brief description of the drawings]

FIG. 1 is a plan view of a bumper according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a main part of the bumper.

FIG. 3 is a sectional view taken along line III-III in FIG. 2;

FIG. 4 is an exploded perspective view of a main part of the bumper.

FIG. 5 is an exploded perspective view of a main part of a bumper according to a second embodiment of the present invention.

6A and 6B are explanatory views of a conventional bumper, wherein FIG. 6A is a plan view of the bumper, and FIG. 6B is a perspective view of a main part of the bumper.

FIG. 7 is a sectional view taken along line VII-VII in FIG. 6 (b).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Bumper 10 ... Bumper main body 14a ... Mounting surface 15 ... Closed part (first closed part) 16 ... Closed part (second closed part) 20 ... Stay 24 ... Hollow part (filled hollow part) 24a ... Opening part (first) Opening part) 24b ... Opening part (second opening part) 29 ... Shock absorbing member (filler) 31 ... Side member (body frame) W ... Welded part

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hajime Maeno 3600, Gezu, Kita-gaiyama, Komaki-shi, Aichi Prefecture Tokai Rubber Industries Co., Ltd. Incorporated (72) Inventor Naoki Nishikawa 6,224 Kaiyamacho, Sakai City Showa Aluminum Co., Ltd.

Claims (4)

[Claims] A hollow portion (24, 2) is provided in a bumper body (10).
A stay (20) provided with at least one of the stays (5, 26) is attached in such a manner that the opening of the hollow part is directed at least downward or upward or downward. Bumper (1) filled with filler (29) in at least one hollow portion (24)
In the bumper body (10), a first closing portion (15) corresponding to a first opening (24a) directed downward in the filling hollow portion (24) filled with the filler is provided. A bumper, wherein at least a part of the first opening (24a) is closed by the first closing portion (15) when the stay is attached to the bumper body. . 2. The filling hollow portion (24) has a second opening (24b) directed upward, and the bumper body (10) has a second block corresponding to the second opening. A second opening (24b) closed by the second closing portion (16) when the stay is attached to the bumper main body. Item 1. The bumper according to Item 1. 3. The stay (20) is manufactured from an extruded profile having at least one hollow portion penetrating in the extrusion axis direction, and the openings on both sides in the extrusion axis direction of the hollow portion are formed as follows.
3. The bumper according to claim 1, wherein said bumper corresponds to said opening. 4. The bumper body (10) is made of an extruded profile, and the closing portions (15, 16) are closer to the vehicle body than a mounting surface (14a) on which the stay is mounted. The bumper according to any one of claims 1 to 3, wherein the bumper comprises a ridge that protrudes and is formed integrally with the extruded profile of the bumper body during extrusion manufacturing thereof and extends in the extrusion axis direction.