JPH0532052U - Canopy opening / closing device for packing boxes - Google Patents

Abstract

(57) [Summary] [Purpose] When the canopy cannot be opened or closed due to a power unit failure, etc., the canopy is opened and closed temporarily. A loading box provided with a canopy openably and closably supported by actuators 6 and 15 linked to the rotation shaft on a rotation shaft rotatably supported along upper and left side wall upper edges of the load box. In the canopy opening / closing device, an accumulator 22 is provided in a pressure oil supply circuit that drives the actuators 6 and 15 via an opening / closing valve.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a canopy opening / closing device for a canopy that prevents scattering of loads loaded in a packing box.

[0002]

[Prior Art]

 Conventionally, a canopy opening / closing device for a luggage box is provided with a canopy which is rotatably supported along upper and left side wall upper edges of the luggage box, and a canopy which is openable / closable about the rotation axis. A hydraulic cylinder is connected to the rotating shaft, and the canopy is opened and closed by expanding and contracting the hydraulic cylinder by supplying pressure oil from a power unit such as a hydraulic pump.

[0003]

[Problems to be solved by the device]

 However, in the above-mentioned conventional one, when there is a failure in the power unit, there is no other means for expanding and contracting the hydraulic cylinder, so the opening and closing operation of the canopy cannot be performed, and a quick response cannot be taken. was there.

Further, when the load box is tilted and the load is discharged while the canopy is closed, a negative pressure is generated in the load box, which causes a problem that the load cannot be discharged smoothly. In such cases, it was necessary to open the canopy immediately.

[0005]

[Means for Solving the Problems]

 The canopy opening / closing device for a packing box according to the present invention is capable of opening and closing on a rotary shaft rotatably supported along the upper and left edges of the left and right side walls of the packing box by an actuator linked to the rotary shaft. In the provided canopy opening / closing device for a cargo box, an accumulator is provided in a pressure oil supply circuit for driving the actuator via an opening / closing valve.

[0006]

[Operation] By installing an accumulator in the pressure oil supply circuit that drives the actuator through an on-off valve, pressure oil can be supplied from the accumulator to the actuator when the power unit fails, etc. Corresponding to.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a canopy opening / closing device provided in a packing box.

In FIG. 1, reference numeral 1 denotes a luggage box mounted on a vehicle body (not shown) of a freight vehicle. A pair of left and right canopies 2 and 2 are provided on a side wall 1 a of the luggage box 1 by a canopy opening / closing device 10. It is openable and closable so as to have a closed position that closes the upper opening of 1 and an open position that opens the upper opening.

Rotating shafts 11 rotatably supported by bearings (not shown) are provided on upper portions of the left and right side walls 1 a of the luggage box 1. The left and right rotating shafts 11, 11 The base end portion of the canopy 2 is rotatably supported.

The canopy 2 has a rotating frame 3 whose base end is pivotally supported by the rotating shaft 11, and a main frame whose base end is rotatably supported by the tip of the rotating frame 3. 4, a seat 5 stretched between the rotating frame 3 and the main frame 4, a base end portion of which is pivotally supported by the rotating shaft 11 via a bracket 7, and a rod end of which is a main frame 4. And a canopy refraction cylinder 6 pivotally supported by an arm 8 at its base end.

The canopy 2 extends from the side wall 1 a to the central portion in the width direction of the luggage box 1 in the closed position shown by the solid line in FIG. It is arranged so as to cover the upper opening of the luggage box 1.

In this example, four canopy refracting cylinders 2 are provided on each of the canopies 2 and 2, and the rotating frame 3 and the main frame 4 are formed in a substantially straight line by the degeneration of the rods. The main frame 4 is arranged so as to be bent with respect to the rotating frame 3 by the extension of the rod.

Next, the canopy opening / closing device 10 will be described with reference to FIGS. 1 and 2.

A small-diameter gear 12 is integrally provided at one end portion on the front side of the rotating shafts 11, 11, and a large-diameter gear 12 and a large-diameter gear 12 which are rotatably provided at the front part of the luggage box 1 are provided. The radial gears 13, 13 are arranged in mesh with each other.

One of the large-diameter gears 13 (the large-diameter gear 13 on the right side in the illustrated example) is integrally provided with a vertically protruding link 14, and a lower end of the link 14 has a canopy opening / closing cylinder. The rod end of 15 is pivotally supported, and one end of the connecting rod 16 is pivotally supported at the upper end of the link 14.

The connecting rod 16 is arranged in the front part of the luggage box 1 and inclined in the width direction, and the other end of the connecting rod 16 is a link arm 17 provided integrally with the other large-diameter gear 13. Is pivoted to.

FIG. 3 shows a hydraulic circuit of the canopy opening / closing device 10.

In FIG. 3, P is a hydraulic pump, and the pressure oil supply side of the hydraulic pump P is connected to the canopy opening / closing cylinder 15 and each canopy bending cylinder 6 via a switching valve 21.

The switching valve 21 is switched from the center position to the right position and the left position by exciting the solenoids SOL1 and SOL2, and the switching operation causes the canopy opening / closing cylinder 15 and the canopy bending cylinders 6 to expand and contract. .

An accumulator 22 stores high-pressure oil, and is connected to the hydraulic pump P side via a valve 23 and to an oil reservoir 25 via a valve 24. The accumulator 22 is configured to store sufficient pressure oil for expanding and contracting the canopy opening / closing cylinder 15 and each canopy bending cylinder 6 when the hydraulic pump P fails.

Reference numeral 26 is a sequence valve, and 27 is a counter balance valve.

Next, the operation of the canopy opening / closing device 10 configured as described above will be described.

With the canopy 2 in the closed position as shown in FIG. 1, the solenoid SOL1 is excited by the operation of a switch or the like to switch the switching valve 21 to the right position, and the pressure oil of the hydraulic pump P is changed. Supply to the piston chambers of the canopy opening / closing cylinder 15 and each canopy bending cylinder 6.

As a result, each canopy refracting cylinder 6 designed to operate at a pressure lower than that of the canopy opening / closing cylinder 15 extends, and the main frame 4 portion of the canopy 2 is rotated upward, so that the rotation frame 3 is rotated. The main frame 4 is arranged in a bent state.

When the extension operation of each of the canopy bending cylinders 6 is finished, the canopy opening / closing cylinder 15 starts the extension operation this time. As the canopy opening / closing cylinder 15 extends, the link 14 provided on the one large-diameter gear 13 is rotated counterclockwise in FIG. As a result, the left and right large-diameter gears 13 and 13 connected to each other via the connecting rod 16 and the link arm 17 are tuned counterclockwise with respect to the right-side large-diameter gear 13 and clockwise. Rotate. As the left and right large-diameter gears 13 and 13 rotate, the small-diameter gears 12 and 12 rotate, whereby the canopies 2 and 2 in the bent state rotate to both the left and right sides of the luggage box 1 and the main frame 4 part. It is arranged in an open position that is substantially parallel to the side wall 1a of the packing box 1.

Further, in the operation of the canopy 2 from the open position to the closed position, the switching valve 21 is switched to the left position, so that the canopy opening / closing cylinder 15 is first retracted to keep the canopy 2 in the bent state. Rotate to the top of 1. When the canopy opening / closing cylinder 15 is completely retracted, the sequence valve 26 is opened, whereby the canopy refracting cylinders 6 are retracted to rotate the main frame 4 portion of the canopy 2 to the closed position shown in FIG.

That is, the operation from the open position to the closed position is performed in the reverse operation of the operation from the closed position to the open position.

Here, when the power unit such as the hydraulic pump P or the motor for driving the hydraulic pump P fails, the valve 23 shown in FIG. 3 is opened, and the pressure oil stored in the accumulator 22 is stored. Is supplied to the canopy opening / closing cylinder 15 and each canopy bending cylinder 6 to open / close the canopy 2 and quickly deal with a failure.

Further, even when the load box 1 is tilted and the load is discharged while the canopy is kept closed and the load cannot be discharged smoothly, the pressure oil accumulated in the accumulator 22 is also generated. Is supplied to each canopy refracting cylinder 6 and each canopy refracting cylinder 6 is extended, thereby refracting the main frame 4 portion of the canopy 2 and opening the upper surface opening of the packing box 1. deal with. If only the above problem of not being able to be smoothly discharged is eliminated, the accumulator 22 only needs to extend the canopy refracting cylinders 6, so that the canopy refracting cylinders 6 and the canopy opening / closing cylinders 15 are connected to each other. It can be made smaller than the one that expands and contracts.

Further, by using two large-diameter gears 13 and small-diameter gears 12 having different sizes as in this example, the stroke required for the canopy opening / closing cylinder 15 can be reduced, and the canopy opening / closing cylinder 15 Can be miniaturized.

Furthermore, since the left and right large-diameter gears 13, 13 are connected by the connecting rod 16 via the link 14 and the arm link 17, they can be smoothly synchronized and rotated without rattling.

[0033]

[Effect of the device]

 As described above, according to the present invention, the accumulator is provided in the pressure oil supply circuit for driving the actuator through the on-off valve, so that when the power unit fails, the accumulator is applied to the actuator. By supplying the can, the canopy can be opened and closed, and a failure or the like can be dealt with promptly.

[Brief description of drawings]

FIG. 1 is a rear view showing the overall structure of a canopy opening / closing device for a luggage box according to the present invention.

FIG. 2 is an enlarged rear view showing a canopy and a canopy opening / closing device.

FIG. 3 is a hydraulic circuit diagram of a canopy opening / closing device.

[Explanation of symbols]

 1 Packing Box 1a Side Wall 2 Canopy 6 Canopy Refracting Cylinder 10 Canopy Opening / Closing Device 11 Rotating Axis 15 Canopy Opening / Cylinder 22 Accumulator 23 Valve (Opening / Closing Valve)

Front page continuation (72) Hiroaki Nagauchi, 1-chome, Ichichome, Ageo-shi, Saitama, Nissan Daisel Industry Co., Ltd. Meiwa Kogyo Co., Ltd. Specially equipped vehicle division

Claims (1)

[Scope of utility model registration request] 1. A canopy of a luggage box, wherein a canopy is rotatably supported along upper and left side wall upper edges of the luggage box, and a canopy is openably and closably provided by an actuator linked to the pivot axis. In the opening / closing device, an accumulator is provided in a pressure oil supply circuit that drives the actuator via an opening / closing valve, and a canopy opening / closing device for a luggage box.