JPH0352173Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a loading/unloading platform roof opening/closing device for a vehicle. The present invention relates to a loading platform roof opening/closing device for a vehicle having a structure that

(Prior art) Conventionally, a cover such as a canopy has been attached to the loading platform to protect the cargo from being affected by direct sunlight, wind and rain, or to prevent the cargo from collapsing, and for cargo where waterproofing is important. A van body was installed as a cargo platform.

By the way, when a top or a van body is installed, the cargo loading/unloading port is generally only at the rear, which has the disadvantage of reducing the efficiency of cargo handling operations.

In consideration of this point, a structure has been proposed (Utility Model Publication No. 17812/1983) in which the roof of the loading platform can be freely opened and closed and is directly driven by a hydraulic cylinder, as shown in FIG. In this figure, the loading platform 1 of a truck includes a side gate 7, a front frame 2, a rear frame 3, a support 4 that is supported and connected at the center of the upper side of both, and a support 4 that can be opened and closed. It integrally has roofs 5A and 5B that are pivotally connected, and the front frame 2 and the rear frame 3 and the roofs 5A and 5B.
Hydraulic cylinders 6 are directly connected between the two so as to be able to rise and fall freely. The roofs 5A, 5B are opened and closed by operating the hydraulic cylinder 6 to extend or retract its piston rod.

(Problem to be solved by the invention) By the way, in the structure shown in FIG. The stroke of the hydraulic cylinder must be long in order to open sufficiently without interfering with work. However, since the length of the cylinder that can be mounted is limited by the dimensions of the upper sides of the frames 2 and 3, there are cases where the roof cannot be opened sufficiently.

Furthermore, in order to enable cargo handling operations from above the roof using a crane, etc., it is necessary to be able to rotate the roof by more than 90 degrees and open the roof top.
In the structure shown in Figure 6 above, the rotation range of the roof is less than 90 degrees, making it impossible to suspend and load cargo using a crane or the like.

(Means for Solving the Problems) In view of the above points, the present invention uses a simple mechanism to open the loading platform roof of a vehicle by rotating it by more than 90 degrees to a maximum of about 135 degrees. It is an object of the present invention to provide a loading platform roof opening/closing device for a vehicle that allows loading and unloading not only from the side but also from above the loading platform.

The present invention is a vehicle loading platform roof opening/closing device that opens and closes a pair of roofs that are approximately L-shaped in cross section and cover the top and side surfaces of the vehicle loading platform, using the center side of the upper side of a frame erected at the front and rear of the loading platform as a fulcrum. A mounting bracket is integrated into the center of the upper side of the frame, one end of the rotating arm is pivotally connected to the upper part of the bracket, and the pivot point is further away from the pivot point of the rotating arm when viewed from the opening/closing fulcrum of the roof. A reciprocating cylinder is pivotally connected between the frame side pivot point and the tip of the rotating arm, and the cylinder has dimensions that are shorter than the rotating arm when retracted and longer than the rotating arm when extended. The above-mentioned problems are solved by means of rotating the rotating arm in accordance with the expansion and contraction of the cylinder, and having an extension link pivotally connected between the tip of the rotating arm and the roof.

(Function) The vehicle loading platform roof opening/closing device of the present invention can rotate the rotating arm by more than 90 degrees using a simple link mechanism consisting of a cylinder, a rotating arm, and an extension link. is transmitted to the roof of the loading platform via an extension link, allowing the roof to open up to a maximum of 135 degrees. Max out one roof
When opened approximately 135 degrees, approximately half of the top surface as well as the sides of the loading platform are open, making it possible to suspend or lift cargo using a crane or the like.

It can also be stopped with the roof of the loading platform open at about 90 degrees.

(Example) Hereinafter, an example of the vehicle loading platform roof opening/closing device according to the present invention will be described with reference to the drawings.

Figures 1 to 3 show the structure of the mechanical part of the vehicle loading platform roof opening/closing device, and Figure 4 shows the hydraulic circuit and the
The figure shows a sequence control circuit.

The mechanism shown in FIGS. 1 to 3 corresponds to a pair of roofs 5A and 5B on the upper sides of a front frame 2 and a rear frame 3, which are erected at the front and rear of the truck bed, respectively. It is arranged as follows.

In FIGS. 1 to 3, there is a mounting bracket 1 at the center of the upper side of the front frame 2 and the rear frame 3.
0 is integrated, and a support member 4 is spanned and fixed between the mounting bracket 10 on the front frame side and the mounting bracket 10 on the rear frame side. On both sides of the support member 4, there are roofs 5A, 5 that are symmetrical and have a substantially L-shaped cross section that covers the top and side surfaces of the loading platform.
B is pivotally attached via a hinge 11.

The roofs 5A and 5B are, for example, a frame having a substantially L-shaped cross section with a hood cloth or a metal panel attached thereto.

One end of a rotating arm 12 is pivotally attached to the upper position of the mounting bracket 10, and one end of the rotating arm 12 is pivotally attached to the lower position of the mounting bracket 10 (a pivot point farther from the hinge 11 than the pivot point of the rotating arm 12). One ends of the double-acting hydraulic cylinders 13A and 13B are pivotally connected. Then, the other end of the rotating arm 12 and the cylinder 1
3A and 13B are both pivotally connected to one end of the extension link 14, and the other end of the extension link 14 is attached to the roof 5.
It is pivoted to brackets 15 fixed to the A and 5B sides.

FIG. 4 shows a hydraulic circuit for double-acting hydraulic cylinders 13A and 13B that drive the pair of roofs 5A and 5B to open and close, including a pump P and a motor M that rotates the cylinders.
The oil from the power unit PU equipped with an oil tank, etc. is supplied to the cylinder 13A for the roof 5A (2 cylinders are installed on the front frame and rear frame sides, respectively).
The cylinder 13B for the roof 5B (also two in the front and rear) is supplied with a solenoid.
It is designed to be supplied via an electromagnetic switching valve 16B having SOL3 and SOL4. Note that MR is a relay contact for sequence control.

In the sequence control circuit shown in Fig. 5, MR1
2 and 3, MS1 to MS3 are micro switches for detecting the condition of the right roof 5A, and MS4 to MS6 are for detecting the condition of the left roof 5B.
It is installed on the side. Here, MS1 and
MS4 is a device that instantly activates (turns on) just before the roof rotates 90 degrees, and is similar to MS2.
MS5 is a device that operates (turns on) throughout the range where the roof rotates over 90 degrees. MS3 and
MS6 is activated at the safe position where the roofs are rotated 45 degrees (a position where the roofs will not collide even if either roof is rotated to the maximum of about 135 degrees) (from 0 degrees to the safe position, the ON position is (turns off in safe position).

Relay MR is for controlling motor M of the power unit. CR1 to CR4 are relays, TR1 and TR2 are delay relays and solenoids
SOL1 to SOL4 are the solenoids of the electromagnetic switching valves 16A and 16B of the hydraulic circuit shown in FIG.

Right open push button switch PB1 is for opening the right roof 5A, right close push button switch
PB2 is for closing the right side roof 5A, and the left open push button switch PB3 is for closing the left side roof 5B.
For opening, left close push button switch PB
4 is for closing the left roof 5B.
BT is the battery of the truck, and SW is the main switch.

Next, the operation of the embodiment will be explained. First, turn on the main switch SW shown in Figure 5, and
When right open push button switch PB1 is pressed and held while A and 5B are closed, relay CR1,
Relay MR is energized through the normally closed contact of CR4,
The power unit is connected through the contacts of this relay MR.
The motor M of the PU is activated. At this time, since the solenoid SOL1 of the electromagnetic switching valve 16A is excited at the same time, oil is supplied in the direction in which the piston rod of the double-acting hydraulic cylinder 13A extends, as is clear from FIG. 4, and as a result of this extension of the cylinder 13A, The rotating arm 12 rotates and the roof 5A begins to open. When the roof 5A rotates nearly 90 degrees, the micro switch MS1 is turned on and the delay relay TR1 is energized. Then, after a certain time delay, that TR
Contact No. 1 closes and relay CR1 is energized. Therefore, the normally closed contact of relay CR1 connected in series with relay MR is opened, the operation of power unit PU is stopped, and roof 5A is automatically stopped in the state of being opened approximately 90 degrees as shown in FIG. At this time of stop, MS1 has returned to off.

Further, when the right open push button switch PB1 is once released and then pressed again, the relay MR is energized through the normally closed contacts of the relays CR1 and CR4, and the motor M of the power unit PU is operated through the contacts of the relay MR. Again, since the solenoid SOL1 of the electromagnetic switching valve 16A is excited, oil is supplied in the direction in which the piston rod of the double-acting hydraulic cylinder 13A extends, and as a result of this extension of the cylinder 13A,
The rotating arm 12 rotates over 90 degrees, and the roof 5A opens up to about 135 degrees as shown in FIG.

When the right close push button switch PB2 is pressed, the relay MR is energized, and the motor M of the power unit PU is operated through the contacts of this relay MR.
At this time, at the same time, the solenoid valve 16A
Since SOL2 is excited, oil is supplied in the direction in which the piston rod of the double-acting hydraulic cylinder 13A contracts, as is clear from FIG.
As a result of the contraction, the rotating arm 12 rotates in the closing direction, and the roof 5A closes.

Similarly, if the left opening push button switch PB3 is pressed and held, the roof 5B will open approximately 90 degrees as shown in FIG. 2, and if it is released and then pressed again, it will open up to about 135 degrees. Further, if the left close push button switch PB4 is pressed, the roof 5B is closed.

In addition, if one roof rotates more than 90 degrees, the other roof will be controlled so that it will only rotate to a safe position of about 45 degrees to avoid collisions between the two roofs. For example, as shown in Figure 3, the roof 5A
is rotated approximately 135 degrees, micro switch MS2 is turned on and relay CR2 is energized, so left open push button switch PB3 is turned on.
Even if pressed and held, the power unit PU operates only in the on range of micro switch MS6 (roof 5B range of 0 to about 45 degrees), and roof 5B automatically stops at the safe position when MS6 turns off. It turns out.

Note that the roofs 5A, 5 are connected to the support member 4 via hinges.
Although the roofs 5A and 5B are pivotally connected to the front and rear mounting brackets 10 via hinges, the support member 4 may be omitted.

(Effect of the invention) As explained above, according to the vehicle loading platform roof opening/closing device of the present invention, a pair of roofs having a substantially L-shaped cross section covering the top and side surfaces of the loading platform of the vehicle are supported by the central side of the top surface of the loading platform. In the structure that opens and closes as A cylinder is pivotally attached to the cylinder so that the rotating arm rotates according to the expansion and contraction of the cylinder, and an extension link is pivotally attached between the tip of the rotating arm and the roof, so a simple link mechanism can be used. , the rotation arm can be rotated more than 90 degrees, and the movement of this rotation arm is transmitted to the roof of the loading platform via an extension link, and the roof can be rotated up to 135 degrees.
It can be opened to a certain degree, resulting in an extremely significant improvement in cargo handling operations. In this way, when one roof is opened at a maximum of 135 degrees, approximately half of the top surface as well as the sides of the loading platform are open, which has the advantage of allowing cargo to be lifted and lifted by a crane or the like.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional front view showing the main structure of an embodiment of a vehicle loading platform roof opening/closing device according to the present invention; FIGS. 2 and 3 are explanatory diagrams showing the operation of the embodiment, respectively; FIG. 4 is a hydraulic circuit diagram, FIG. 5 is a circuit diagram of a sequence control circuit, and FIG. 6 is a perspective view of a conventional vehicle loading platform roof opening/closing device. 1... Loading platform, 2... Rear frame, 3... Front frame, 4... Support material, 5A, 5B... Roof, 10,
15...Bracket, 12...Rotating arm, 13
A, 13B... Double-acting hydraulic cylinder, 14... Extension link, PU... Power unit.

Claims (1)

[Scope of Claim for Utility Model Registration] A vehicle that opens and closes a pair of roofs that are approximately L-shaped in cross section and cover the top and side surfaces of the vehicle's loading platform, with the central side of the upper side of a frame erected at the front and rear of the loading platform as a fulcrum. In the cargo platform roof opening/closing device, a mounting bracket 10 is installed at the center of the upper side of the frame.
One end of the rotating arm 12 is pivotally connected to the upper position of the bracket 10, and a pivot point on the frame side is located at a position farther from the pivot point of the rotating arm 12 when viewed from the opening/closing fulcrum of the roof. A reciprocating cylinder 13A is pivotally mounted between the tip of the rotating arm, and the cylinder 13
A is a dimension that is shorter than the rotating arm 12 when retracted and longer than the rotating arm when extended, so that the rotating arm rotates in accordance with the expansion and contraction of the cylinder, and the rotating arm A loading platform roof opening/closing device for a vehicle, characterized in that an extension link 14 is pivotally connected between the tip and the roof.