JPH0318252Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an openable and closable hood for a freight vehicle.

[Prior Art] Conventionally, as an openable and closable canopy, gate-shaped columns or front and rear walls are fixedly installed at the front and rear of the loading platform, and a frame called a center frame is provided at the top between these columns. Some are constructed by rotatably supporting a canopy frame on the left and right sides of this center frame. Fig. 4 is a diagram of such a conventional canopy seen from the rear, where 2 is a rear wall fixed to the truck bed 1, 3 is a center frame, and 4 is a roof on both sides of the center frame 3. The hood frame 5 is rotatably supported by a shaft, and 5 is a hood sheet stretched over the hood frame 4. The hood frame 4 opens and closes in the direction of the arrow in the figure. Moreover, 6 is the fan of the loading platform 1. 5A and 5B are a front view and a side view of the hood frame 4, in which the frame pipe 4a,
4b, 4c, intermediate pipe 4d and thin pipe 4e~
4g, and the frame pipe 4a portion is rotatably supported on both sides of the center frame 3. The hood frame 4 is integrated with the operation bar 7, and can be opened and closed independently on the left and right by manual operation around the axis of the frame pipe 4a on the center frame 3 side. 8 is a rope connected to one end of the operating bar 7 for opening/closing operation. 9 is a gas damper for providing auxiliary force during opening/closing operations.

Now, in the above-mentioned truck hood, the weight of the hood frame 4 including the hood seat 5 is approximately 200 kg on each side for a large vehicle, and the weight excluding the front and rear supports 2 of the loading platform 1 is It will be around 500Kg. By simply supporting this weight with the front and rear columns 2,
Since there is no support at all between the supports 2 of the loading platform 1,
Vibrations during driving have a large effect on the hood frame 4 and the like. When the center frame 3 vibrates vertically while the vehicle is running, the hood frame 4 vibrates vertically and horizontally. This displacement is particularly large in the case of a two-axle rear-wheel vehicle with a long loading platform and in the case of a four-axle vehicle with a low chassis rigidity.
Here, naturally, larger vibrations are applied to the hood frame 4 at locations farther away from the frame pipe 4a than at the frame pipe 4a. Therefore, stress is intensively applied to the joints of the frame pipes 4b, 4c, intermediate pipe 4d, and thin pipe 4e near the lower end of the canopy frame 4, indicated by arrows in FIG. There was a problem that could easily cause

[Purpose of the invention] The present invention was made to solve the above-mentioned conventional problems, and its purpose is to create a truck hood that minimizes the occurrence of cracks in the hood frame due to vibrations during driving. The aim is to propose the following.

[Summary of the invention] This invention is a canopy that supports the canopy in an openable and closable manner, and a part of the canopy skeleton is formed by a skeleton member that is slidable in the length direction. This is designed to keep stress low and prevent cracks from occurring in the canopy frame.

[Example] Hereinafter, the present invention will be explained in detail using drawings showing a preferred embodiment. The overall structure of the hood of a freight vehicle according to an embodiment of the present invention is the same as that shown in FIG. 3, so a description thereof will be omitted.

FIG. 1 is a front view of a top frame 10 constituting the top of a truck according to an embodiment of the present invention, and FIG. 2 is a partial perspective view of the top frame 10. This hood skeleton 10
is formed by multiple skeletal members such as pipes. 1
0a is a frame pipe serving as the center of rotation of the canopy frame 10, 1
0b is the both sides L whose one end is joined to the frame pipe 10a.
10c is a frame pipe joined between the lower ends of frame pipe 10b, 10d is frame pipe 10
It is an L-shaped intermediate pipe similar to the frame pipe 10b connected between a and 10c. And frame pipe 1
Between 0b and intermediate pipe 10d and between intermediate pipe 10d
As shown in the figure, four thin pipes 10f are connected between them, and an L-shaped thin pipe 10g is connected approximately at the center between the frame pipe 10a and the thin pipe 10f.

The structure up to this point is the same as the conventional canopy frame 4 shown in FIG. Easy frame pipe 10b
As shown in the figure, a joint between a thin pipe 10e and a receiving pipe 10h is provided near the joint between the intermediate pipe 10d and the frame pipe 10c. As shown in FIG. 3, the thin pipe 10e is slightly shorter than the interval between the frame pipe 10b and the intermediate pipe 10d, and its left end is fixed near the lower ends of the frame pipe 10b and the intermediate pipe 10d. Also,
The receiving pipe 10h has an inner diameter into which the thin pipe 10e is inserted and taken out, and the thin pipe 10h is inserted into the receiving pipe 10h from one end.
0e is inserted, the right end is fixed to the intermediate pipe 10d and the frame pipe 10b.

As described above, the thin pipe 10e and the receiving pipe 10h, which are slidable with respect to each other, are installed near the lower end of the hood frame 10.
Since a joint consisting of
Dispersed by the 0h slide. Therefore, the magnitude of stress applied to the joint portion near the lower end of the canopy frame 10 is reduced, and it is possible to prevent cracks from occurring in the joint portion.

Next, the frame pipe 10, which is also prone to cracking, is
As shown in the figure, triangular gusset plates 11 are fixed to the joints between the intermediate pipe 10d and the frame pipe 10c for reinforcement. If such a gusset plate 11 is provided at the joint, stress caused by vibration will be dispersed and cracks will be prevented.

In addition, in the embodiment, a case is shown in which the joint portion of the thin pipe 10e and the receiving pipe 10h is provided as a partner of the gusset plate 11, but the gusset plate 1
1 is optional and may be selected depending on the size of the hood frame 10. Canopy skeleton 1
If the pipe 0 is small, cracks can be sufficiently prevented by the distribution of stress by the thin pipe 10b and the receiving pipe 10h, so it is not necessary to provide a gusset plate.

[Effects of the invention] As described above, according to the invention, since the slidable frame member is joined to the portion of the canopy frame away from the rotating shaft where cracks are likely to occur, stress caused by vibration is dispersed and cracks are prevented. can be effectively prevented.

[Brief explanation of the drawing]

FIG. 1 is a front view of the top frame of a truck top according to an embodiment of the present invention, FIG. 2 is a partial perspective view of the top frame of FIG. 1, and FIG. FIG. 4 is a partially enlarged view showing an example of a conventional hood of a freight vehicle that can be opened and closed, and FIGS. 5A and 5B are front views of the hood frame of the conventional hood shown in FIG. 4. Here, 10... hood skeleton, 10a to 10c...
Frame pipe, 10e... thin pipe, 10h... receiving pipe, 11... gusset plate.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In an openable truck canopy comprising a top frame rotatably supported between pillars erected at the front and rear of a loading platform, It is characterized by being constituted by a slidable skeleton member in which one end of a thin pipe, which is a skeleton member constituting the canopy skeleton, is fixed to a part remote from the supporting part, and the other end is inserted in a free state. The hood of a lorry. (2) The hood of a truck according to claim 1 of the utility model registration claim, characterized in that a reinforcing cassette plate is fixed to the joint portion of the frame members of the hood frame.