JPS6231537A - Cargo bed elevating device in cargo handling vehicle - Google Patents

Abstract

PURPOSE:To prevent a cargo bed from hindering the opening of a door even in a ban type vehicle having a double-leafed hinged door by providing such an arrangement that the cargo bed may be stored in the lower section of a vehicle body in a folded condition. CONSTITUTION:A cargo bed 8 is folded into two parts, and is manually rotated toward the lower section of a vehicle body 1 while it is slightly raised from the ground surface. Thereby, the cargo bed 8 is held at a position where the weight of the cargo bed 8 and the spring force of a torsion bar 7 are balanced together. In this condition, when a support member 3 is elevated, the cargo bed 8 abuts against a guide member 14, and is successively rotated while it slides on the guide member 14 due to the further elevation of the support member 3, so that the cargo bed 8 takes a horizontal storage posture. Thereby, it is possible to store the cargo bed 8 into the lower section of the vehicle body.

Description

Detailed Description of the Invention A0 Object of the Invention (11 Industrial Application Fields) The present invention provides a structure in which a support member is disposed at the rear end of a vehicle body so as to be movable up and down, and the support member is capable of being folded into at least two parts. The present invention relates to a cargo platform elevating device for a cargo handling vehicle on which a cargo platform is supported.

(2) Prior Art Conventionally, in such a loading platform elevating device, when the loading platform is not in use, the loading platform is rotated 90 degrees from a horizontal position to a vertical position.

(3) Problems to be solved by the invention 5 However, when the above-mentioned conventional cargo platform elevating device is installed in a pan-type vehicle having double doors, the cargo platform in a vertical position is moved when the double doors are opened. It got in the way and made work difficult.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a loading platform elevating device for a cargo handling vehicle, which improves workability by allowing the loading platform to be stored below the vehicle body.

B0 Configuration of the Invention fII Means for Solving the Problems According to the present invention, the loading platform is located between the loading/unloading position in which it projects horizontally toward the rear of the vehicle body and the storage position in which it is stored below the vehicle body. It is supported by a support member so as to be rotatable over a range of at least 180 degrees, and is provided between the loading platform 3 and the supporting member so that when the loading platform is rotated over 90 degrees from the loading/unloading position to the storage position, the loading platform is rotated upwardly. A resilient member is provided on the lower surface of the rear end of the vehicle body, and a guide member is provided on the lower surface of the rear end of the vehicle body to rotate the cargo receiving platform to a storage position (a guide member is provided in sliding contact with a part of the cargo receiving platform). .

(2) Operation When storing the loading platform, the loading platform is folded and raised slightly above the lower limit position, and then rotated more than 90 degrees toward the storage position to raise the support member.
A portion 5 of the load receiving platform contacts the guide member and further raises the support member, whereby the load receiving platform rotates to the storage position while slidingly contacting the guide member.

(3) Embodiment Hereinafter, an embodiment of the present invention will be explained with reference to the drawings. First, as shown in FIG. The outer tubes 2 are each fixed. Cylindrical support members 3 each having a rectangular cross section are inserted into the outer cylinder 2, and a wire (not shown) is wound around a pulley 4.5 pivotally supported by these support members 3. Furthermore, the wires are connected to a hydraulic cylinder (not shown), and both support members 3 move up and down within the outer cylinder 2 in accordance with the operation of the hydraulic cylinder.

Support plates 6 that protrude rearward are fixed to the lower ends of both support members 3, and a hollow cylinder 15 of a loading platform 8 is rotatably supported between the surface support plates 6, and serves as a resilient member. A torsion bar 7 is provided between the support plate 6 and the loading platform 8. That is, the loading platform 8 is rotatable within a range of at least 180 degrees between a loading/unloading position in which it protrudes horizontally to the rear side of the vehicle body 1 and a storage position in which it is stored below the vehicle body 1. 6 is supported. In addition, the support member 6 is designed to raise and lower the loading platform 8, which is in the loading/unloading position as shown by the solid line in FIG. , can be moved up and down within the outer cylinder 2, and the outer cylinder 2 is provided with a slit for moving the support plate 6.

The torsion bar 7 provided between the loading platform 8 and the support plate 6 is arranged so that the loading platform 8 is approximately 45 mm from the horizontal as shown by the chain line.
It is arranged so that it does not exert a spring force in any direction when it is in the mid-chamber attitude N, and in the loading/unloading attitude shown in FIG.
This is obtained because the spring force is greater than the spring force due to the 45 degree twist. Moreover, in order to maintain the loading and unloading posture, a stopper 11 is provided at right angles on the base 8a of the loading platform 8, and the support plate 6 comes into contact with the stopper 11 to prevent rotation of the loading platform due to its own weight. A member 12 is provided as a receiver for regulating.

Further, the torsion bar 7 rotates the loading platform 8 when the loading platform 8 is rotated by more than 45 degrees from the neutral attitude N toward the vehicle body, that is, by more than 90 degrees from the loading/unloading attitude toward the storage attitude. Hit to 8's own weight.

It is set so as to exert a spring force that can rotate the cargo receiving platform 8 upwardly, that is, toward the loading/unloading position.

In FIG. 2, the loading platform 8 has a hinge 13 at its intermediate portion.
By folding it in this way, it becomes possible to rotate the loading platform 8 slightly raised from the ground 9 to the lower side of the vehicle body 1.

A guide member 14 is fixed to the lower surface of the rear end of the vehicle body 1 to allow a portion of the cargo receiving platform 8 to come into sliding contact with the guide member 14 .

Next, the operation of this embodiment will be explained. When loading cargo onto the cargo platform 10 of a cargo handling vehicle, the cargo receiving platform 8 in the loading/unloading position is lowered to above the ground 9 as shown by the solid line in FIG. After the cargo is loaded onto the cargo receiving platform 8, the cargo receiving platform 8 is raised to a position corresponding to the cargo platform 10, as shown by the chain line, and the cargo is moved from the cargo receiving platform 8 onto the cargo platform 10. Further, when unloading the cargo from the loading platform 10, the operations described above can be performed in reverse, and the loading and unloading of the cargo can be easily carried out.

To store the cargo tray 8 after loading and unloading the cargo, fold the cargo tray 8 in two as shown in Fig. 2.
Furthermore, as shown in FIG. 3, the loading platform 8 is rotated by manual operation toward the lower side of the vehicle body 1 while being slightly raised from the ground 9.

Then, the loading platform 8 is held at a position where the weight of the loading platform 8 and the spring force of the torso bar 7 are balanced. Therefore, when the support member 3 is raised, the cargo receiving platform 8 is moved to the guide member 1.
4, and as the support member 3 further rises, the loading platform 8 sequentially moves as shown by the chain line in FIG. 3 while slidingly contacting the guide member 14, and finally, as shown in FIG.
The loading platform 8 assumes a substantially horizontal storage position.

In this storage position, the base 8a of the loading platform 80 is in a horizontal state across both support plates 6, and the base 8a can be used as a step.

In this way, the loading platform 8 can be stored below the vehicle body 1, so even if it is applied to a pan-type vehicle with double doors, the loading platform 8 will not get in the way when the double doors are opened.
Improves work efficiency.

As another embodiment of the present invention, rollers may be provided on the loading platform 8 at the portions that come into sliding contact with the guide member 13 (and the elastic member may be a torsion bar 7 or a coil spring, etc.). It is also possible to use

C0 Effects of the Invention As described above, according to the present invention, the loading platform has a range of at least 180 degrees between the loading/unloading position in which it projects horizontally toward the rear of the vehicle body and the storage position in which it is stored below the vehicle body. The loading platform is rotatably supported by the support member, and there is a space between the loading platform and the supporting member that can bias the loading platform upward when the loading platform is rotated by more than 90 degrees from the loading/unloading position to the storage position. A resilient member is provided on the lower surface of the rear end of the vehicle body, and a guide member is provided on the lower surface of the rear end of the vehicle body to rotate the cargo receiving platform to the storage position (a guide member that slides into a part of the cargo receiving platform is provided, so that the cargo receiving platform can be folded up). By rotating toward the vehicle body side and raising the support member, the loading platform can be stored below the vehicle body. By storing it below the vehicle body, it is possible to avoid any hindrance to the opening work and improve work efficiency.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a side view, FIG. 2 is a side view corresponding to FIG. 1 when the loading platform is folded, and FIG. FIG. 4 is a cutaway side view of the main part when it is rotated downward, and FIG. 4 is a cutaway side view of the main part when it is stored. DESCRIPTION OF SYMBOLS 1... Vehicle body, 3... Supporting member, T... Torsion bar as an elastic member, 8... Loading platform Patent applicant Kyokuto Kaihatsu Kogyo Co., Ltd. Figure 2

Claims (1)

[Claims] In a loading platform elevating device for a cargo handling vehicle, in which a support member is disposed at the rear end of the vehicle body so as to be movable up and down, and a loading platform that can be folded into at least two is supported on the support member. supported by a support member so as to be rotatable over a range of at least 180 degrees between a loading/unloading position protruding horizontally to the rear side and a storage position storing below the vehicle body;
A resilient member is provided between the cargo receiving platform and the support member, and is capable of biasing the cargo receiving platform upward when the cargo receiving platform is rotated by more than 90 degrees from the loading/unloading position to the storage position. A loading platform elevating device for a cargo handling vehicle, characterized in that a guide member is provided on the lower surface of the end of the loading platform, the guide member slidingly contacting a part of the loading platform in order to rotate the loading platform into a storage position.