JPH0434147Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field The present invention provides a truck loading platform comprising an outer panel constituting the side outer wall of the loading platform, an inner panel constituting the inner wall on the cargo loading space side, and a reinforcing top rail. Regarding side wall structure.

Prior Art The above-mentioned type of loading platform side wall structure has been known for a long time.Since this type of side wall structure has a double wall structure consisting of an inner panel and an outer panel, it is possible to more securely carry loaded cargo than a single wall side wall structure. can be protected. However, in a loading platform side wall structure having an inner panel and an outer panel, it is necessary to weld the upper parts of both panels to the top rail and assemble them together, so a large welding allowance must be provided on the top rail. For this reason, it is necessary to make the top rail large in consideration of the welding allowance, which not only increases the material cost but also increases the weight of the side wall structure.

On the other hand, when an instantaneous external force is applied to the truck bed from behind, if the rigidity of the side wall structure of the bed is too high, the bed will not deform and will collide with the rear of the cab, potentially deforming the cab. Therefore, it is desirable to deform the cargo platform by an external force from behind and thereby absorb the impact so that no large external force is applied to the cargo platform. However, it is difficult to construct a loading platform in such a way that it maintains a certain level of rigidity during normal times when no external force is applied, but deforms when external forces are applied.
It was common for the cab to be constructed so that it would not deform even if the loading platform bumped into it. However, the provision of such a reinforcing member increases the weight of the cab and increases the cost.

Purpose This invention was made based on the above recognition,
The object is to provide a loading platform side wall structure of the type described at the beginning, which provides a high impact absorption effect against external forces from the rear of the loading platform, while reducing weight and cost.

Configuration In order to achieve the above object, the present invention includes an outer panel that constitutes the side outer wall of the loading platform, an inner panel that constitutes the inner wall on the cargo loading space side, and a reinforcing top rail. The upper part of the outer panel is welded to the outside surface of the hanging part, and the upper part of the inner panel is welded to the surface of the hanging part facing the luggage loading space. Welded, a plurality of notches arranged in the longitudinal direction of the top plate are formed at the lower part of the hanging part, and these notches are covered by the inner panel and hidden between the inner panel and the outer panel. We propose a side wall structure for the loading platform of a truck.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows an example of a truck equipped with a loading platform side wall structure according to the present invention, in which 1 indicates a cab and 2 indicates a loading platform located behind the cab. Loading platform 2
The vehicle has a floor plate 3 on which cargo (not shown) is loaded, side walls 4 forming each side of the cargo platform 2, and a tailgate 5 pivotally connected to the rear so as to be openable and closable. The side wall 4 is constructed of a side wall structure according to the present invention as described below.

FIG. 2 is a cross-sectional view taken along the - line in FIG. 1, and as is clear from this figure, the side wall 4 constitutes an outer panel 6 that constitutes the side outer wall of the loading platform 2, and an inner wall on the side of the cargo loading space 8. It has an inner panel 7 and a top rail 9 that reinforces these panels 6 and 7, and the lower part of the inner panel 7 is fixed to the floor plate 3 mentioned above. The top rail 9 extending in the front-rear direction A (FIGS. 1 and 3) of the loading platform 2 has an approximately horizontal top portion 10 and a hanging portion 12 that hangs downward from an end portion 11 of the top portion 10 on the cargo loading space 8 side. Rope hooks 13 are fixed to the lower surface of the top rail 9 at appropriate intervals. By hanging ropes (not shown) on these hooks 13, the cargo loaded on the platform 2 can be secured.

The upper part of the outer panel 6 is overlapped with the outer side surface of the hanging part 12, and this overlapping part is fixed by spot welding as schematically indicated by the X mark. Further, the upper part of the inner panel 7 is overlapped with the surface of the hanging part 12 on the cargo loading space 8 side, and this overlapping part is also fixed by spot welding as shown by the X mark. In this way, the top rail 9, the outer panel 6, and the inner panel 7 are integrally fixed to each other.

As clearly shown in FIG. 3, a plurality of notches 14 are formed in the lower part of the hanging portion 12 of the top rail 9 and are arranged in the longitudinal direction A of the top rail 9.
4 and the inner panel 7 are spot welded together, as also indicated by the X in FIG. In other words, the notch 1 is formed in the hanging part excluding the welding allowance part 18 necessary for welding with the inner panel 7.
4 is formed. Although the side wall structure on one side of the loading platform is shown in FIGS. 2 and 3, the other side wall is constructed in exactly the same manner.

The illustrated loading platform 2 has a top rail 9 as described above.
Since a large number of notches 14 are formed in the hanging portion 12 of the top rail 9, the amount of material required for the top rail 9 can be reduced accordingly, and the material cost and weight can be reduced. Moreover, not only can the outer panel 6 and the top rail 9 be welded without any problem, but since there is a welding allowance 18 between each notch 14, the inner panel 7 can also be welded to the top rail 9 without any problem and assembled together. can.

Also, as shown in FIG. 4a, when manufacturing the top rail, a material 109 consisting of two top rails is
For example, by roll forming, and then cutting this material 109 along the cutting line indicated by the chain line, two top rails 9,9 each having a notch 14 as shown in FIG. 4b can be obtained. This makes it possible to effectively manufacture top rails while eliminating wasted materials. If two top rails 9a, 9a are manufactured using the same method from the material 209 without providing notches as shown in FIGS. The width d of the portion 12a must be increased, so the material 209
It is necessary to increase the width D of the portion corresponding to the hanging portion. If the notch 14 is formed as shown in FIG. 4b, the width W of the part corresponding to the drooping part of the material 109 can be made smaller than the width D, and the material cost can be reduced.

Further, as is clear from FIG. 2, the notch 14 of the hanging portion 12 is covered by the upper part of the inner panel 7 and hidden between the inner panel 7 and the outer panel 6. Therefore, the notch 14 is not visible from the side of the cargo loading space 8 or from the outside of the vehicle, and the appearance of the loading platform 2 is not impaired by the notch 14.

After each part of the loading platform 2 is assembled during the manufacturing of the loading platform 2, the entire body is painted for the purpose of improving the appearance and preventing rust, but the edge of the panel has a thin film of paint, so it cannot be completely prevented by painting alone. It is difficult to rust. For this reason, as shown in FIG. 2, sealers 15 and 16 are applied to the upper edges 6a and 7a of the outer and inner panels 6 and 7 before the final coating to prevent rust from forming. Similarly, the edge 14a of the portion 18 and the notch 14
(Figure 3) is also a place where rust is relatively likely to occur because the coating film is thin. However, since the notch 14 is shielded from the outside by the inner panel 7 and the outer panel 6, it is less likely to be exposed to rainwater, etc., and therefore rust is less likely to occur from here even if no sealer is applied to the edge 14a. Therefore, it usually does not become a problem. Further, even if rust occurs on the edge 14a, since this is a portion hidden by both panels 6 and 7, the rust will not be noticeable and will not cause a deterioration in appearance. To further ensure rust prevention, a rust preventive oil such as wax may be applied to the edge 14a, but in this case as well, the wax is covered by both panels 6 and 7, so the wax will not come into contact with people. There is no risk of damaging the appearance of the loading platform (see, for example, Japanese Utility Model Application Publication No. 11822/1983 for the method of applying rust preventive oil).

Moreover, the notch 14 also exhibits an excellent function related to shock absorption as described below. That is, when an impactful external force is applied from the rear of the loading platform 2 as shown by the arrow F in FIG.
Stress is concentrated on. Therefore, the top rail 9 is deformed from the portion of each notch 14, and the energy of the external force F is absorbed by the top rail 9. Therefore, it is possible to prevent the loading platform 2 from hitting the cab 1 with a large force, and it is possible to prevent the cab 1 from being deformed without providing a strong reinforcing member at the rear portion 1a (FIG. 1) of the cab 1. It is possible to reduce the cost.

Providing cutouts in the tailgate 5 and the top rail also has the advantage of reducing their weight and cost.

Effects According to the present invention, a high impact absorption effect can be obtained with the extremely simple structure of forming a notch in the top rail, and the weight and cost of the loading platform can be reduced. Furthermore, since the notch is hidden by the inner panel and the outer panel, deterioration in the appearance of the cargo platform can be prevented, and problems related to rusting from the edges of the notch can be avoided.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a truck equipped with a cargo bed side wall structure according to the present invention, Fig. 2 is a cross-sectional view taken along the - line in Fig. 1, and Fig. 3 is a portion of a single top rail as seen from the cargo loading space side. Perspective view, Figure 4a,
5b is a perspective view showing an example of the manufacturing process of a top rail, and FIGS. 5a and 5b are perspective views showing an example of the manufacturing process of a top rail without notches. 2... Loading platform, 4... Side wall, 6... Outer panel, 7... Inner panel, 8... Luggage loading space, 9... Top rail, 10... Top, 11...
...end, 12... hanging part, 14... notch, A...
Longitudinal direction.

Claims (1)

[Scope of utility model registration request] The loading platform includes an outer panel that constitutes the side outer wall of the cargo platform, an inner panel that constitutes the inner wall on the cargo loading space side, and a reinforcing top rail, which hangs downward from the top end of the cargo loading space side. The upper part of the outer panel is welded to the surface of the hanging part on the outside of the vehicle, the upper part of the inner panel is welded to the surface of the hanging part on the cargo loading space side, and the lower part of the hanging part has a top rail. A plurality of longitudinally arranged notches are formed,
A truck bed side wall structure characterized in that these cutouts are covered by an inner panel and hidden between the inner panel and the outer panel.