JP2019064384A - Vehicular protector member - Google Patents

Abstract

To provide a vehicular protector member that, while maintaining the strength thereof, can suppress manufacturing costs and contribute to weight reduction of the protector member.SOLUTION: A protector member 7 is made of a single metal plate 13 that is bent multiple times. The protector member has: a hollow member 15 having a first surface 17a that faces a longitudinal end of a vehicle, a second surface 17b that is opposite to the first surface, a third surface 17c that connects the first surface and the second surface on the upper side, and a fourth surface 17d that connects the first surface and the second surface on the lower side; and an intermediate plate 17e that is made of an end part of the metal plate, is provided between the first surface and the second surface and extends in the vehicle width direction. The first surface or the second surface of the hollow member is connected to the vehicle. In end part regions β of the hollow member, no opening part is formed in the third surface, and the hollow member has opening parts 27 in the fourth surface.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vehicle protector member disposed at the front-rear direction end of a vehicle.

In vehicles with a large height, such as large buses and truck vehicles, protector members (underrun protectors) are attached to the front and rear ends of the chassis frame to prevent the passenger car from getting into the space between the chassis frame and the road surface. .
A hollow member is used for such a protector member. Recently, as disclosed in Patent Document 1, in order to improve the strength of the hollow member, reinforcement is performed by a method of providing an intermediate plate inside the hollow member.

JP 2003-276535 A

Not only the strength but also the manufacturing cost and weight reduction of the protector member are regarded as important.
However, the hollow member provided with the above-described midplate is generally manufactured by casting, which increases the manufacturing cost. Moreover, because the weight of the hollow member itself is increased, there is a risk that the fuel efficiency of the vehicle may deteriorate and the loadable amount of the truck may decrease.

  Therefore, an object of the present invention is to provide a vehicle protector member that can suppress the manufacturing cost and contribute to the weight reduction of the protector member while maintaining the strength of the protector member.

  An aspect of the present invention is a protector member consisting of a single metal plate which is disposed along the vehicle width direction at the front end or rear end of the vehicle and is bent a plurality of times, and is made of a metal plate on the center side of the vehicle A first surface facing the first surface, a second surface facing the first surface, a third surface connecting the first surface and the second surface at the upper side in the vehicle height direction, and the first surface A hollow member extending in the vehicle width direction, having a fourth surface connecting the second surface on the lower side in the vehicle height direction, and an end of a metal plate, and between the first surface and the second surface And an intermediate plate extending in the vehicle width direction, wherein the first or third surface of the hollow member is connected to the vehicle, and in the end region of the hollow member, the third surface is an opening Were not formed and had an opening in the fourth surface.

  As described above, since the hollow member is formed by bending a single metal plate a plurality of times and is provided with an intermediate plate in the inside and a cylindrical shape extending in the vehicle width direction, the required strength, that is, the strength when using the intermediate plate Can be maintained. In addition, the hollow member made of a metal plate is cheaper and lighter in manufacturing cost than the cast manufacturing.

  In addition, the end of the protector member is reduced in weight in consideration of being used as a step for raising and lowering to the loading box or the like with the driver's foot. That is, the end region of the hollow member in the vehicle width direction does not form an opening in the third surface used as a step, and forms an opening in a fourth surface not used as a step. Therefore, the protector member can be further reduced in weight while securing the vertical convenience of the driver.

BRIEF DESCRIPTION OF THE DRAWINGS The perspective view which shows the protector for vehicles attached to the vehicle used as the aspect which concerns on the 1st Embodiment of this invention. The perspective view which partially cut out which shows the hollow member which comprises the protector for the vehicles. Sectional drawing in the intermediate region of the hollow member in alignment with the AA in FIG. The perspective view which shows the single metal plate which comprises a hollow member. Sectional drawing explaining the process in which a hollow member is formed by several bending | flexion of the single metal plate. Sectional drawing which shows the aspect which concerns on the 2nd Embodiment of this invention.

Hereinafter, the present invention will be described based on a first embodiment shown in FIGS.
FIG. 1 shows a commercial vehicle (vehicle) such as a truck intended for transportation, for example, and 1 in FIG. 1 shows a chassis frame of the vehicle. The chassis frame 1 has a ladder structure in which a pair of side rails 3 extending in the longitudinal direction of the vehicle and a cross member (not shown) extending in the vehicle width direction are combined. A cabin and a power unit (both not shown) are mounted on the front of the vehicle of the chassis frame 1, and a packing box 5 is mounted on the rear of the vehicle.

The vehicle protector member 7 (underrun protector: at least one of the vehicle-direction end of the chassis frame 1, specifically at least one of the front end and the rear end of the side rail 3) is an end in the longitudinal direction of the vehicle. Hereinafter, only the protector is provided. Only the protector 7 at the rear end of the vehicle is shown in FIG. These protectors 7 are disposed along the vehicle width direction, and prevent a passenger car or the like from getting into between the chassis frame 1 and the road surface (not shown).
The same structure is adopted for these protectors 7 for the front and rear of the vehicle. For this reason, in the present embodiment, the protector 7 disposed at the rear end of the vehicle will be described.

  That is, as shown in FIGS. 1 and 2, the protector 7 is a component extending along the vehicle width direction of the vehicle. The protector 7 is fixed to the tips of a pair of stays 9 protruding downward from the rear end of the side rail 3. Incidentally, for the pair of stays 9, a component having a mounting seat 10 extending in the vehicle rear direction and extending in the vehicle height direction at the extension end is used. The protector 7 is assembled to a mounting surface of the mounting seat 10 facing the rear of the vehicle.

The protector 7 is required to properly maintain strength, to be inexpensive in manufacturing cost, to be lightweight, and the like.
Therefore, the protector 7 adopts the rectangular tubular hollow member 15 configured by a process in which a single metal plate 13 is bent a plurality of times as shown in FIG. 5 and FIG. Is planned.

  That is, the hollow member 15 which comprises the protector 7 is comprised, for example by roll forming process. For example, the hollow member 15 sets a plurality of longitudinally extending fold lines 13a at predetermined positions of a single rectangular metal plate 13 as shown in FIG. 4 and roll forming as shown in FIG. It is molded in a molding process by a processing machine (not shown). Specifically, for example, as shown in FIGS. 5A to 5E, for example, the hollow member 15 bends one end 14a of the metal plate 13 according to the bending line 13a and stands up. Then, from this state, the remaining metal plate 13 is bent a plurality of times while being rolled according to the bending line 13a, and finally, the other end portion 14b is erected and formed. In FIG. 5 (e), reference numerals indicating first to fourth surfaces 17a to 17d to be described later are attached.

  Thereby, the hollow member 15 can be disposed at the vehicle body end as shown in the perspective view of FIG. 2 and the cross sectional view of FIG. 3 (line AA in FIG. 2), and the end 14a of the metal plate 13 is It is configured in the form of a square tube disposed in the hollow portion. Specifically, as shown in FIGS. 2 and 3, the hollow member 15 has a left side wall facing the center of the vehicle as a first surface 17 a and an opposite right side wall facing the first surface 17 a. The second surface 17b, the upper wall is the third surface 17c connecting the first surface 17a and the second surface 17b at the upper side in the vehicle height direction, and the lower wall is the first surface 17a and the second surface The end surface 14a of the metal plate 13 is an intermediate plate 17e disposed between the first surface 17a and the second surface 17b. It is configured in a square tube shape. The intermediate plate 17e extends in the vehicle width direction at an intermediate position between the third surface 17c and the fourth surface 17d. Incidentally, the end 14a of the metal plate 13 forming the intermediate plate 17e is joined to the second surface 17b by welding, and the end 14b of the metal plate 13 forming the first surface 17a is at the corner of the intermediate plate 17e. It is joined. Reference numeral 18 in FIGS. 3 and 4 indicates the joint portion.

  Further, as shown in FIG. 2, a plurality of, for example, four bolt insertion holes 19a are provided at the center in the vehicle width direction of the first surface 17a, that is, on the left side wall facing the mounting seat 10 of the stay 9 of the vehicle. Further, on the inner surface of the left side wall, a nut 19b (corresponding to a connecting member of the present application) is provided in communication with each bolt insertion hole 19a. That is, as shown in FIGS. 2 and 3, the first surface 17 a of the hollow member 15 is configured to be fastened (connected) to the stay 9 on the vehicle side by screwing the bolt 20. Thus, the hollow member 15 is assembled to the rear end of the vehicle along the vehicle width direction. The openings at both ends of the hollow member 15 are closed by the cover 21 (FIG. 1).

  The bending-molded cylindrical hollow member 15 of the single metal plate 13 is lightweight, and maintains the required strength, that is, the strength when reinforced with the intermediate plate 17e.

The hollow member 15 also adopts a structure for reducing the weight without losing convenience.
That is, it is known that the end of the protector 7 assembled to the end of the vehicle as shown in FIG. 1 is used as a step for lifting the driver's foot and moving it up and down to the cargo box 5 or the like. There is.

  Therefore, as shown in FIGS. 2 to 4, in the end region β of the hollow member 15 in the vehicle width direction, no opening is formed in the upper third surface 17 c used as a step, that is, the third The opening 27 is formed only in the fourth surface 17 d which is not used as a step, with the surface 17 c remaining unchanged. In the present embodiment, two large and small rectangular openings are used as the opening 27. In particular, the opening 27 is provided on the fourth surface 17 d in consideration of the appearance of the protector 7. Of course, the opening 27 is not limited to a square, but may have another shape. Also, the number may be one or three.

  That is, by providing the opening 27 only on the fourth surface 17 of the protector 7, the weight reduction can be promoted while maintaining good appearance without losing utilization as a step.

As described above, the protector 7 is lighter in weight and further reduced in manufacturing cost as compared to the case of manufacture by casting by the structure of the cylindrical hollow member 15 formed by bending the single metal plate 13 by bending. Can.
Moreover, by providing the opening 27 in the fourth surface 17 d disposed on the lower side of the end region β of the hollow member 15 to reduce the weight of the hollow member 15, the driver moves up and down using the protector 7. The weight saving of the protector 7 can be further achieved while securing the vertical convenience of doing as it is.

  Therefore, the protector 7 can maintain the strength appropriately, can suppress the manufacturing cost, and can contribute to weight reduction. In addition, the elevating convenience can be maintained.

FIG. 6 shows a second embodiment of the present invention.
This embodiment shows the case where the stay of a vehicle does not fix the side part of the protector 7, but fixes the upper part of the protector 7.
Specifically, in the present embodiment, as in the first embodiment, the nut 19 b (connection member) is provided on the first surface 17 a of the protector 7, and the stay 9 of the side fixing type using the first surface 17 a The nut 29b is provided on the third surface 17c of the protector 7 and fixed to the upper fixed stay 39 by the bolt 30 using the third surface 17c.
Even if such a structure is used, the protector 7 exhibits the same effect as that of the first embodiment.

However, in the second embodiment, the same parts as those of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
The present invention is not limited to the above-described first and second embodiments, and various changes may be made without departing from the scope of the present invention.

7 Protector (Protector member)
13 single metal plate 15 hollow member 17a first surface 17b second surface 17c third surface 17d fourth surface 17e middle plate 19b nut (connection member)
27 Opening β end area

Claims (1)

A protector member comprising a single metal plate which is disposed along the vehicle width direction at a front end or a rear end of a vehicle and which is bent a plurality of times,
The first surface formed of the metal plate and facing the center side of the vehicle, the second surface facing the first surface, the first surface, and the second surface in the vehicle height direction A hollow member extending in the vehicle width direction, comprising: a third surface connected on the upper side; and a fourth surface connecting the first surface and the second surface on the lower side in the vehicle height direction;
And an intermediate plate which is an end portion of the metal plate, is provided between the first surface and the second surface, and extends in the vehicle width direction,
The first or third surface of the hollow member is connected to the vehicle,
An opening part is not formed in the said 3rd surface in the end part area | region of the said hollow member, but it has an opening part in the said 4th surface. The vehicle protector member characterized by the above-mentioned.

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