JPH0214970Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a labor-saving cargo handling vehicle useful for transporting medium-weight vehicles such as forklifts and road paving machines.

(Prior Art) A labor-saving cargo handling vehicle (for example, Utility Model Publication No. 55-101761) has been proposed, in which the loading platform is tilted and moved backward to load and unload from the installed rear end.

In this labor-saving cargo handling vehicle, the rearward tilting and backward movement of the loading platform are guided by a guide rail provided on the chassis side using a single cylinder. Additionally, the surrounding areas are mechanically and structurally unable to withstand medium-weight vehicles. Therefore, the load is 5t
There is a problem with the carrying capacity, which is limited to lighter vehicles.

Moreover, in order to ensure the stability of the loading platform when moving backwards, priority is given to the landing of the foot on the rear end of the slide guiding element of the loading platform, which increases the maximum height of the loading platform's center of gravity when tilting backwards. There are issues that leave concerns about cargo stability.

(Problem to be solved by the invention) The problem to be solved by the invention is to create a labor-saving cargo handling vehicle that has double the carrying capacity, has a low center of gravity on the loading platform when tilting backwards, and has excellent load stability. It is on offer.

(Means for Solving the Problems) The means taken by the present invention to achieve the above-mentioned problems is to arrange sliding guiding elements for the loading platform in the front and rear parts of the chassis behind the cabin, respectively. At the same time, the slide guide element of the rear half is pivoted so that it can tilt backwards by receiving the driving force of the left and right lifting cylinders attached to the middle part of the chassis, and the slide guide element of the front half is placed on the slide guide element of the rear half. The loading platform mounted across the top is supported so as to be slidable in the longitudinal direction by receiving the driving force of the sliding cylinder on the guiding element side of the rear half, and the loading platform is moved from its normal position so that its center of gravity is on the axis of the rear wheels. Reverse position where the rear end of the slide guiding element on the rear half side is tilted backward from the same retract position until the rear end of the slide guide element touches the ground; The present invention is characterized by a configuration including a control element that adjusts the timing of the lifting cylinder and the sliding cylinder so that they sequentially move to the grounded cargo handling position and move back.

(Function) The control element, the slide cylinders controlled by the same element, and the left and right lifting cylinders move the loading platform.
First, the slide is moved backward from the normal position to the reverse position along the front and rear slide guiding elements, and the center of gravity of the loading platform is moved to near the axis of the rear wheels to lower the center of gravity of the loading platform at the dump-up position. The weight ratio of the front half of the loading platform bordering on the shaft support of the slide guiding element is lightened to reduce the load on the lifting cylinder, and then the weight is adjusted backward from the retracted position to the dump-up position, and then , slide backward from the dump-up position where the center of gravity is lowered to the cargo handling position, control the operation so that it is ready to load and unload the load, and then return to the original normal position through the dump-up position where the center of gravity is lowered and the weight is adjusted. Control double action.

(Example) An example of implementation of the present invention will be described in detail below based on the drawings.

A in the figure is a labor-saving cargo handling vehicle, and this labor-saving vehicle A
The slide guide elements 4 and 5 of the loading platform 3 are arranged in the front and rear parts of the chassis 2 behind the cabin 1, respectively, and the slide guide elements 5 of the rear part are arranged.
The slide guide element 4 is supported on the slide guide element 5 so that it can be tilted backwards by receiving the driving force of the left and right lifting cylinders 6, 6 attached to the middle part of the chassis 2.
The loading platform 3 mounted across the top is supported so as to be slidable in the front and rear direction by receiving the driving force of the sliding cylinder 7 on the guiding element 5 side, and the loading platform 3 is moved from a normal position so that its center of gravity is aligned with the rear wheel 8. A backward position in which the rearward movement is made within a range that does not exceed the rearward position on the axis; a dump-up position in which the installation leg 9 of the rear end of the slide guide element 5 is tilted backward from the same backward position; A control element 10 is provided for timing the lifting cylinders 6, 6 and the sliding cylinder 7 so that the lifting cylinder 3a sequentially moves to the cargo handling position where it touches the ground and moves back.

The slide guide element 4 is installed and fixed on the front half of the chassis 2, and has guide rollers 11, 11 pivotally supported on the upper surface thereof.
A loading platform 3 is supported on the top so that it can slide only forward and backward. Furthermore, the slide guiding element 4 is provided with a joint 12 at the center of its front end, and a joint 13 on the loading platform 3 side is connected to this connecting portion 12 with a connecting pin 14, so that the loading platform 3 can be locked in a normal position. In addition, the shaft-like protrusions 16, 16 on the loading platform 3 side are loosely fitted into the connecting holes 15, 15 on the left and right sides of the front end in the same normal position, so that the left and right movement of the loading platform 3 is regulated. .

The slide guiding element 5 is installed on the rear half of the chassis 2 so as to be able to tilt backwards using a shaft support 17 as a fulcrum until the grounding foot 9 at the rear end touches the ground, and a guide roller 19 is provided on the upper surface portion. It is supported so that it can only be slid forward and backward.

The lifting cylinders 6, 6 are connected to their rods 6a, 6a.
are connected to the front end portions of the slide guide elements 5, respectively, and the driving force thereof allows the loading platform 3 together with the slide guide elements 5 to be moved from the retreat position to the dump-up position and back.

The slide cylinder 7 has its rod 7a connected to the front part of the bottom surface of the loading platform 3, and its driving force moves the loading platform 3 from the normal position to a retracted position, for example, approximately 1 meter behind, and from the dump-up position to the tailgate-shaped rear end 3a. It is designed to be able to operate and return to the cargo handling position where it is lowered flush with the loading surface and touches the ground.

The control element 10 is in communication with the lifting cylinders 6, 6 and the slide cylinder 7 via a hydraulic line, and in the automatic control mode (FIG. 3), the main operating lever 20 in the cabin 1 is turned on and the pump 21 is turned on. By rotating the operating lever 23 of the relay box 22 from the OFF state to the indicated (not shown) push side, each cylinder 6, 6, and 7 is activated as appropriate to move the loading platform 3 from its normal position. The operation is automatically controlled sequentially to the reverse position and then to the cargo handling position, and by turning the operating lever 23 to the front side of the display (not shown), the loading platform 3 is sequentially returned to the original normal position. Automatic double-motion control is possible.

This control element 10 is operated in a manually controlled manner (fourth
(Fig.) is optional, and in this case, the dedicated operation levers 24 and 25 are operated at the appropriate time to control the loading platform.
It is possible to operate and double-move from the normal position to the retreat position and then to the cargo handling position. In such a manual control mode, alignment marks (not shown) indicating the retracted position are displayed on the chassis 2 or the slide guiding element 4 and the loading platform 3.

In addition, a winch 26 installed at the front end of the loading platform 3 is connected to the control element 10 via a hydraulic line, and by operating a dedicated operating lever 27, it is possible to load and unload even loads that are not capable of self-propulsion. There is.

As a result, the lifting cylinders 6, 6 and the sliding cylinder 7 are automatically or manually controlled by the control element 10, and the loading platform 3 is moved from the normal position to the weight-adjusted retreat position and from the same retreat position to the dump-up position with a lower center of gravity. position, and the operation can be controlled from the dump-up position to the cargo handling position, and the return movement can be controlled to the normal position.

Moreover, in the normal position, the loading platform 3 has joint parts 12 and 13.
are connected by a connecting pin 14, and shaft-shaped protrusions 16, 16 are loosely fitted into the connection holes 15, 15 to lock the front part of the loading platform, and shaft-shaped protrusions 28 on the left and right sides of the bottom of the loading platform 3 are connected to the chassis. It loosely fits into the connection hole 29 on the second side to lock the side of the loading platform, and furthermore, the stopper claws 30, 30 on the rear bottom surface of the loading platform 3 are engaged with the rear end of the slide guiding element 5 to lock the rear of the loading platform. The chassis 2 is locked with no play in moving forward, backward, left, right, or up and down. Therefore, not only is there no rattling of the loading platform 3 during transportation (while driving), but also
Able to transport loads stably.

(Effect of idea) Therefore, the present invention has the following advantages.

It is possible to smoothly load, unload, and transport loads of about 10 tons, which is the loading weight of a triaxial vehicle, while taking advantage of the advantage of cargo handling by sliding and raising and lowering the loading platform with the front and rear wheels in contact with the ground. .

The center of gravity of the loading platform at the dump-up position is low, providing good load stability during loading and unloading.

The center of gravity of the loading platform in the reverse position and dump-up position has been moved closer to the rear wheels, reducing the burden on the lifting cylinder and increasing durability.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an embodiment of the labor-saving cargo handling vehicle of the present invention. FIG. 2 is a plan view with a portion cut away. 3 and 4 are circuit diagrams showing the hydraulic configuration of the control elements and each cylinder, with FIG. 3 showing the automatic type and FIG. 4 showing the manual type. Figures 5 to 8 are reduced side views showing the operating order of the loading platform, with Figure 5 in the normal position, Figure 6 in the reverse position, Figure 7 in the dump-up position, and Figure 8 in the cargo handling position. It shows. In the figure, 1 is a cabin, 2 is a chassis, 3 is a loading platform, 3a is a rear end, 4 and 5 are slide guide elements,
6 is a lifting cylinder, 7 is a sliding cylinder,
8 is the rear wheel, 9 is the ground foot, and 10 is the control element.

Claims (1)

[Scope of utility model registration request] Left and right lifting cylinders in which slide guiding elements 4 and 5 for the loading platform 3 are arranged in the front and rear parts of the chassis 2 behind the cabin 1, respectively, and the slide guiding element 5 of the rear part is attached to the middle part of the chassis 2. Drive of the slide cylinder 7 on the side of the guide element 5 of the loading platform 3 which is pivotably supported so as to be tiltable backward in response to the driving force of the slide guide elements 5 and 4. The loading platform 3 is supported so as to be slidable in the front and rear directions in response to a force, and is moved backward from the normal position within a range in which its center of gravity does not exceed the axis of the rear wheel 8 rearwardly. The lifting cylinders 6, 6 and A labor-saving cargo handling vehicle equipped with a control element 10 for timing a slide cylinder 7.