JPH04201621A - Load carrying platform opening/closing device for truck, and so on - Google Patents

Abstract

PURPOSE:To close left and right side doors in single form by pivotally installing one edge of a lower cam and one edge of an extension body with a gate shaped frame, installing the other edge of the extension body and one edge of an upper cam with the other edge of the lower cam coaxially and pivotally, and pivotally installing the other edge of the upper cam, side door, and each edge part of a ceiling plate, in superposed state, and connecting the left and right side doors by a joint stripe through a pulley. CONSTITUTION:When a left side rope 15 is pulled, a left side door 8 turns downward, and cams 2 and 4 are pushed rightward, and compress an extension body 6. The whole of a ceiling plate 9 is pushed leftward around the pivotal installation part 3 of the lower cam 2 on the left side by the compression repulsive force. Accordingly, the ceiling plate 9 is shifted leftward, and the upper part pivotal installation part 10 of the right side upper cam 4 is pulling-shifted leftward. Accordingly, the right side upper and lower cams 4 and 2 turn around a pivotal installation part 7, and the right side door 8 tends to turn in the right direction, and a joint stripe 13 is tightened by the turn of the left door 8, and the movement of the right side door 8 is suppressed. Accordingly, the left and right doors can be solely closed smoothly.

Description

[Detailed description of the invention] [Industrial application field] Opening/closing device for cargo boxes of vehicles such as trucks.

[Conventional technology]

As conventional technology, Japanese Utility Model Publication No. 54-51712,
Publication No. 57-32022, Publication No. 57-3290
There are publications such as No. 8.

[Problem to be solved by the invention]

With conventional models, when closing the left and right side doors from the open state,
This was very inconvenient because the left and right side doors had to be set at roughly the same angle and closed at the same time.

[Means to solve the problem]

Therefore, one end of the lower cam was pivotally attached to both ends of the gate-shaped frame,
The other end of the lower cam is coaxially connected to the upper cam and the other end of the telescopic body whose one end is pivotally connected to the portal frame, and the other end of the upper cam is pivotally connected to the side door and the end of the ceiling board. One end of each of the left and right side doors is fixed to the other end of a connecting strip, such as a wire lobe, which is fixed to the portal frame via a guide part such as a pulley.

[For production]

In the configuration on the ridge, when the rope or other strip 15 on the left side is pulled, the state does not start from the state shown in FIG. 1, but becomes the intermediate state shown in FIG. 6 is compressed in the shrinking direction. When the expandable body 6 is compressed, a repulsive force is generated, and this repulsive force becomes a force that pushes the entire ceiling panel 9 to the left around the lower pivot 3 part of the lower cam 2 on the left side, and the entire heavenly valve moves to the left. move towards Also, the pin at the upper pivot point 10 of the upper cam 4 on the right side is also pulled and moves to the left.
The upper cam 4 and the lower cam 2 rotate around the pivot joint 7, and the right door 8 rotates upward, so it collapses into the right door 8.
The right side door 8 is provided with a connecting bundle 13, 13 of a wire rope or the like in order to eliminate the drawback that it cannot be closed. Therefore, due to the tension of the connecting bundle 13 such as a wire rope, the repulsive force of the elastic body 6 such as a spring is generated. This produces a remarkable effect of preventing the ceiling panel 9 from moving to the other side and preventing trash from falling onto the other side door.

〔Example〕

Further, to explain this with reference to an example of the embodiment shown in the drawings, one end of the lower cam 2.2 is pivotally attached 3.3 to both ends of a gate-shaped frame 1 provided in a cargo box of a desired vehicle such as a truck, and cam 2
．． 2 and the upper cam 4.4 and one end of the gate-shaped frame 1.
The other end of a telescoping body 6.6 such as a coil spring or hydraulic cylinder which is pivotally mounted on the upper cam 4.
The other end of 4 is pivoted to the end of the side doors 8, 8 and the ceiling plate 9 using a shaft common to the front and rear, and each of the left and right side doors 8, 8 is connected via a guide part 11.11 such as a pulley. One end 12.12 is attached to the gate-shaped frame 1 as a bonded bundle 13 of wire rope or the like.
．． The other ends 14, 14 of the side doors 8, 8 are fixed, and tensioners 15, 15, such as ropes, are provided at the ends of the side doors 8, 8.

Next, we will explain the effect when the elastic body 6 is constructed of a coil spring. When the tension 15 of the rope or the like on the left side is pulled, the state shown in FIG. 1 first changes to the intermediate state shown in FIG. , the coil spring extensible body 6 is compressed in the direction of contraction. When the coil spring 6 is compressed, a repulsive force is generated, and this repulsive force is applied to the left lower cam 2.
A force is generated that pushes the entire ceiling board 9 to the left around the lower pivot joint 3, and the entire ceiling moves to the left. In addition, the shaft of the upper pivot joint 10 of the upper cam 4 on the right side is also pulled and moves to the left, causing rotation around the pivot joint 7 of the upper cam 4 and lower cam 2, and the right door 8 is moved upward. In order to eliminate the drawback that the right side door 8 cannot be closed because of the rotation, a connecting bundle 13.13 of wire rope etc. is provided, so that the tension of the connecting bundle 13 of wire rope etc. is provided. According to
The repulsive force of the spring 6 can produce a remarkable effect that can prevent the ceiling plate 9 from moving to the other side and the door on the other side from falling down.

In addition, when the extensible body 6 is a hydraulic cylinder, the left door is pulled in the closing direction as the left cylinder expands and contracts, and the second door is pulled in the closing direction.
It will be in the state shown in the figure. The rotational moment is larger on the left side around the pivot joint 7 that connects the upper cam 4 and the lower cam 2 on the left side, and a force that tends to rotate the cam to the left side is generated. This force is transmitted to the ceiling plate 9, as in the case of using a coil spring, and becomes a force that moves the ceiling plate 9 to the left. The right side door is pulled by the ceiling plate 9 around the pivot point 7 between the right side upper cam 4 and the lower cam 2, and is pulled by the front and rear penetrating shafts 10 at the top of the right side upper cam 4, and the right side door 8 is pulled upward. A connecting bundle 13 such as a wire rope prevents the right side door 8 from falling onto the ceiling due to rotation, and each of the side doors 8 can be smoothly closed independently.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention. Figure 1 is a front view of the main parts with the left and right doors open, Figure 2 is an explanatory diagram of the intermediate state, and Figure 3 is with both doors closed. It is a front view in a state. l...Portal frame, 2.2...Lower cam, 3.3.
... Pivot joint, 4.4... Upper cam, 6,6... Telescopic body,
7... Pivot, 8.8... Side door, 9... Ceiling board, 1
0... Pivot joint, 11... Guide part for pulleys, etc., 12.12
... One end, 13° 13 ... Bonded bundle of wire rope, etc., 14.14 ... Other end, 15.15 ... Tension

Claims (1)

[Claims] One end of the lower cam is pivotally connected to both ends of the gate-shaped frame, and the other end of the lower cam is coaxially connected to the upper cam and the other end of the telescopic body whose one end is pivotally connected to the gate-shaped frame. The other end is pivotally attached to the side door and the end of the ceiling board, and each side door on the left and right is fixed to the other end of a connecting strip such as a wire rope with one end fixed to the portal frame via a guide such as a pulley. A cargo box opening/closing device for a vehicle such as a truck, which is characterized by: