JPS6335451B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cargo platform opening/closing mechanism that divides the cargo platform of a truck into upper and lower halves and facilitates opening and closing of the cargo platform.

For example, the bed plates such as the side plates and rear plate that make up the bed of a truck are manufactured as one piece regardless of the loading capacity, and are opened and closed by connecting the lower end of the bed plate to the bed floor with a hinge. It was hot.

These cargo platform plates are intended for transporting heavy objects, and need to have a sturdy structure to withstand shocks during loading and unloading.

With a loading platform constructed as one piece in this way, when unloading a loaded object, the loading platform is heavy and the burden of opening/closing work is heavy, and the loading platform is burdened by its own weight when opened. Because the cargo was suspended perpendicular to the platform floor, it was not possible to unload the cargo to a position farther from the vehicle body.

This invention was made in view of the above points,
This was devised with the intention of reducing the workload by facilitating the opening and closing operations of the cargo bed plate.

Hereinafter, an embodiment of the present invention implemented on a side plate will be described with reference to the drawings. Reference numeral 1 denotes a loading bed floor of a truck, and a support 2 is erected on this loading bed floor 1.

The side plate 3 is divided into an upper side plate 3a and a lower side plate 3b, and the upper side plate 3a is supported by a fixing bracket 4 provided on the pillar 2 by a mounting pin 5.

When the loading platform floor 1 is laterally tilted by a dump cylinder (not shown), the upper plate 3a opens under its own weight around the mounting pin 5, and closes under its own weight when the loading platform floor 1 returns to a horizontal position.

The opening and closing of this upper side plate 3a will be explained below using the lower side plate 3b.
This is done under open conditions.

The lower end of the lower plate 3b is connected to the loading platform floor 1 by a pin 6.
A lock pin 7 is provided on the upper part of the lower plate 3b.

The lower plate 3b can be secured to the support column 2 by hooking this lock pin 7 into a fitting recess of a locking member 8 rotatably pivoted to the substantially middle portion of the support column 2.

Reference numeral 9 denotes a hydraulic cylinder disposed between the column 2 and the lower part of the lower plate 3b, and the column 2 and the hydraulic cylinder 9 are connected to a bracket 10 fixed to the column 2 so that the hydraulic cylinder 9 can be moved up and down. The long holes are connected.

A protruding member 1 is provided in the middle part of the hydraulic cylinder 9.
1 is fixed, and a portion of the protruding member 11 is in contact with the locking member 8.

Note that 12 is an elastic member that always urges the locking member 8 in the locking direction.

Next, to explain the operation of the present invention, the side plate 3
In the closed position, the hydraulic cylinder 9 is retracted, and the lower plate 3b is rotated to a position perpendicular to the platform floor 1 as shown, and at the same time, the lock member 8 engages with the lock pin 7 fixed to the lower plate 3b. and lower plate 3
b is secured to the post 2.

At this time, the lower side of the upper plate 3a engages with the upper end of the lower plate 3b, and is prevented from rotating counterclockwise about the pin 5.

Next, the operation of opening the side plate 3 from this closed state will be explained. When the hydraulic cylinder 9 is extended, the barrel side of the hydraulic cylinder 9 first moves along the elongated hole provided in the bracket 10, and this As a result of the movement, the protruding member 11 fixed to the intermediate portion of the hydraulic cylinder 9 rotates the locking member 8 counterclockwise against the biasing force of the elastic member 12, thereby releasing the engagement with the locking pin 7.

After that, when the hydraulic cylinder 9 is further extended,
The lower plate 3b rotates counterclockwise around the pin 6, and rotates to the position indicated by the two-dot chain line in the drawing.

At this position, further clockwise rotation between the lower plate 3b and the column 2 is prevented by a conventionally known restriction chain (not shown) or the like.

When the loading platform floor 1 is laterally tilted from this state, the upper plate 3a is opened around the mounting pin 5 by its own weight or by the pressure of the load discharged from above the loading platform floor 1.

At this time, the lower plate 3b is fixed at a position parallel to the platform floor 1 and serves as a discharge chute, allowing the cargo to be discharged to a position away from the vehicle body.

In this embodiment, the explanation has been made regarding opening and closing of the side plates, but the opening and closing of the side plates may also be applied to the rear plate.

As described above, according to the present invention, the lock release between the lower plate and the column and the forced opening and closing of the lower plate can be performed by a series of expansion and contraction operations of the same hydraulic cylinder, and the opening and closing operations can be performed with a simple device. can.

Furthermore, if the hydraulic cylinder is remotely controlled from the driver's seat, the cargo can be unloaded from the driver's seat, making the work easier.

[Brief explanation of drawings]

The drawings illustrate embodiments of the invention.
The figure is a longitudinal cross-sectional view of the loading platform floor, and FIG. 2 is a partial cross-sectional side view with some parts omitted. 1... Loading platform floor, 2... Support column, 3... Side plate, 3a
...Upper side plate, 3b...Lower side plate, 7...Lock pin, 8...Lock member, 9...Hydraulic cylinder, 1
1...Protruding member.

Claims (1)

[Claims] 1. The side plate or rear plate constituting the loading platform is divided into upper and lower halves by an upper plate and a lower plate, and the upper end of the upper plate is pivotally connected to a column erected on the loading platform floor so that it can be opened and closed, On the other hand, the lower end of the lower plate is pivotally connected to the platform floor so as to be openable and closable, and a hydraulic cylinder is disposed between the support and the lower plate via a long hole,
Further, the lock member rotatably connected to the support column is provided to be able to engage and disengage from a lock pin fixed to the lower plate, and the hydraulic cylinder is provided with a protruding member that can come into contact with the lock member. The lower plate is forcibly opened and closed by the expansion and contraction operation of the hydraulic cylinder, and the locking member is disengaged from the locking pin at the beginning of the operation. Truck bed plate opening/closing mechanism.