JPH0234116Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a rear bumper arm device to which a tow hook (transport hook) of a vehicle, for example, an automobile, is attached.

[Conventional technology]

Conventionally, the bumper arm body was fixed to the body,
The rear bumper is attached to the bumper arm body, and if the transport hook is welded and fixed to the bumper arm body, the body tightening part of the bumper arm body is likely to deform when a large load is applied to the transport hook. Moreover, when a lateral load is applied to the transport hook, the hook itself is deformed significantly.

For example, when transporting a car, especially on a ship, the bumper arm body is secured with a transport hook, but if the bumper arm body deforms due to heavy loads caused by the shaking of the ship, the appearance quality will deteriorate significantly. .

Therefore, in order to suppress the deformation of the bumper arm main body tightening part, as in the first conventional example shown in the drawings from FIG. 4 to FIG. The bumper arm main body 3 has an arm lower 4a fixedly welded to it, and a transport hook 5 is welded to the bumper arm lower 4a.
There is one that is fixed to the body by passing bolts (not shown) through weld nuts 6, 6 that are welded to the bumper arm main body 3.

In addition, the reference numeral 2 in the figure indicated by a chain line in FIG.
is Bumpari Inforce.

In addition, as a device for suppressing the deformation of the transport hook 5, the second transport hook shown in FIGS.
There is a prior art example of
The illustrated reinforcing plate 9 is welded between the bumper arm body 3 and the transport hook 5 for reinforcement.

Furthermore, as a third conventional example, there is one shown in FIG.

This is a "traction and tie-down hook" disclosed in Japanese Utility Model Application Publication No. 56-155905, and is a reinforcing wall extending almost perpendicularly downward on one side of a board 11 having a mounting hole 10 to the frame. 12 and 13 in series, and a hook body 5a formed by bending the middle part of a rod-shaped body into an annular shape and bending both ends to form a letter shape toward the side. It is characterized in that both ends are fixed to the lower surface of the substrate 11, and the middle part of the annular part is fixed to the tips of the reinforcing walls 13, 13.

Furthermore, there is a fourth conventional example shown in FIG.

This is a "traction hook structure" disclosed in Japanese Utility Model Publication No. 58-33303, which includes a locking part 16 for hanging a traction rope on a bumper stay 15 that holds the bumper 1a, and This device is characterized in that a tow rope passage portion 17 is provided on the front surface corresponding to the locking portion 16.

[Problem that the invention attempts to solve]

However, in the first conventional example, since the closed cross section 7 of the bumper arm main body 3 shown in FIG. 6 is large, when a large load is applied downward to the bumper arm main body 3, The area around the weld nut 6 of the bumper arm body 3 is easily deformed, causing the bumper to lower.

Moreover, in order to prevent deformation of the transport hook 5, the dimension l (overhang amount) shown in FIG.
needs to be made smaller.

Further, in the second conventional example (FIGS. 7 and 8), it is necessary to add separate reinforcing plates 8 and 9 and welding, which is disadvantageous in terms of weight and cost.

Furthermore, in the third conventional example (Fig. 9), as in the first conventional example, when a large load is applied downward to the bumper arm main body, the area around the body attachment part of the bumper arm main body easily deforms. Bumper lowering occurs.

Therefore, the problem that this invention attempts to solve is to prevent deformation of the bumper arm body 3 by preventing the large load from being applied to the bumper arm body 3 even when a large load is applied to the transport hook 5. be.

[Means for solving problems]

Therefore, this invention attempts to solve the above-mentioned problems by forming the bumper arm body 3, to which the transport hook 5 is welded, into a chevron shape.

More specifically, referring to the reference numerals in FIG. 1, a bumper arm main body 3 having a cross-sectional shape formed to attach the rear bumper 1 is fixed to the body with bolts, and the shape of the bumper arm main body 3 is as follows. The top surface 40 of the bumper arm lower 4 formed in a chevron shape is located inside the cross section of the bumper arm lower 4.
A transport hook 5 is fixed to one foot-shaped portion 41 of a bumper arm lower 4 which overlaps the cross-sectional inner side of the top surface portion 30 of the bumper arm body 3 and extends toward the side adjacent to the rear bumper 1. , each hem end portion 4 of the one and the other hem portions 41 and 42 of this bumper arm lower 4.
a, 4a and 4b, 4b are fixed to the bumper arm main body 3, respectively.

[Effect]

According to the above-mentioned means, the transport hook 5
Even when a large load is applied to the bumper arm body 3, since the bumper arm lower 4 to which the transport hook 5 is fixed is formed in a chevron shape, the bumper arm body 3
A large load is not applied to the bumper arm body 3, and deformation of the bumper arm body 3 can be prevented.

〔Example〕

Hereinafter, embodiments of this invention will be described based on the accompanying drawings.

The drawings from FIG. 1 to FIG. 3 show an embodiment of this invention, in which a bumper arm main body 3 having a cross-sectional shape formed to attach a bumper reinforcement 2 of a rear bumper 1 shown by a chain line in FIG. ,
It is fixed to a body (not shown) with bolts (not shown), and as can be seen from FIG. As can be clearly seen from FIG. 3, the top surface 40 of the bumper arm lower 4 is superimposed on the inside cross-section of the top surface portion 30 of the bumper arm body 3.

Both side surfaces 410, 4 of one foot-shaped portion 41 of the bumper arm lower 4 extending to the side adjacent to the bumper reinforcement 2 of the rear bumper 1
10, a transport hook 5 is fixed by welding to both side surfaces 410, 410 of one hem-shaped portion 41 of this bumper arm lower 4 and both side surfaces 420, 420 of the other hem-shaped portion 42.
The hem end portions 4a, 4a and 4b, 4b are each fixed to the inner side of the cross-sectional shape of the bumper arm body 3 by spot welding.

Furthermore, as can be seen from Figures 2 and 3,
A weld nut 6a for body tightening is welded to the back surface 400 of the top surface 40 of the bumper arm lower 4.
0 and a body (not shown), and the bumper arm main body 3 is attached to the body (not shown) by a bolt (not shown) screwed into the weld nut 5a. It is becoming fixed.

Note that the reference numeral 6b in FIGS. 1 and 2 is
This is a weld nut for body tightening that is welded to the bumper arm main body 3.

In this way, the bumper arm lower 4 is set to maintain the cross-sectional shape of the bumper arm main body 3.
A weld nut 6a for tightening the body is set, and the easily deformed part of the bumper arm body 3 is made into a double structure as shown in Fig. 3, so that the load applied to the transport hook 5 is directly transmitted to the body. At the same time, the transport hook 5 and the body are connected not only through the bumper arm main body 3 but also through the bumper arm lower 4. By extending the foot-shaped portion 42 diagonally downward and making it play the role of reinforcing the transport hook 5, the strength and rigidity of not only the transport hook 5 but also the bumper arm body 3 itself are greatly improved. Moreover, the bumper arm main body 3 becomes difficult to deform.

[Effect of idea]

As mentioned above, this design has a structure in which the large load applied to the transport hook is not directly received by the bumper arm body without increasing the number of parts, so even if a large load is applied to the transport hook, the bumper arm body does not receive the large load directly. Therefore, even if a large load is applied to the transport hook set on the bumper arm body during transport lashing or towing, the bumper arm body will not deform, so the strength and rigidity of the transport hook will be reduced. Along with this improvement, bumper lowering due to deformation extending to the bumper arm body does not occur.

[Brief explanation of the drawing]

The drawings from Fig. 1 to Fig. 3 show an embodiment of this invention, in which Fig. 1 is a perspective view showing the overall configuration, Fig. 2 is a sectional view taken along the line - - of Fig. 1, and Fig. 3 1 is a sectional view taken along the - line in FIG. 1, and the drawings from FIG. 4 to FIG. 6 show the first conventional example.
The figure is a perspective view, FIG. 5 is a sectional view taken along the - line in FIG. 4, FIG. 6 is a sectional view taken along the - line in FIG. Fig. 7 is a partial perspective view, Fig. 8 is a side view, and Fig. 9 is a partial perspective view.
FIG. 10 is a perspective view showing the third conventional example, and FIG. 10 is a perspective view showing the fourth conventional example. 1... Rear bumper, 3... Bumper arm body,
30...Top section, 4...Bumper arm lower, 40
...Top surface, 41...One mountain foot-shaped portion, 42...
Other hem-shaped portions, 4a, 4b... hem end portions, 5...
...Transportation.

Claims (1)

[Scope of utility model registration request] A bumper arm lower is welded to the inner side of the cross-sectional shape of the bumper arm main body, which is fixed to the body with bolts and formed to attach a rear bumper, and a transport hook is welded to this bumper arm lower. In the rear bumper arm equipped with a towing hook device, the bumper arm lower is formed into a chevron shape, and the top surface of the bumper arm lower overlaps the cross-sectional inner side of the top surface of the cross-sectional shape of the bumper arm body and is close to the rear bumper. A transport hook is fixed to one of the hem-shaped parts of the bumper arm lower extending to the side, and each hem end of the one and the other hem-shaped parts of the bumper arm lower is fixed to the bumper arm body, respectively. A rear bumper arm device featuring: