JPH07304593A - Crane car and operation method therefor - Google Patents

Abstract

PURPOSE:To keep a car body vertical by a part having a cant by securing the head on the overhang boom tip in a crane car to hang up a cargo. CONSTITUTION:A hydraulic jack 7 is arranged between a carriage 3 and a car body 4, and is received by a spherical surface-shaped upper slide plate 8 and a lower slide plate 9. A pair of both rod type hydraulic cylinders 10a and 10b are rotatably installed on both sides. Piping is laid so that the hydraulic cylinders 10a and 10b cross with each other, and a three-way directional control solenoid valve is arranged so that oil pressure is applied to either of them or it is sealed. When oil pressure is applied to the boom projecting side hydraulic jack 7, since the car body 4 and a boom rise, a descent of the boom by hanging up a cargo is compensated. When the hydraulic cylinders 10a and 10b are operated, since the car body 4 tilts, the car body 4 can be kept vertical by a part having a cant.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steerable vehicle that travels on a track and hoists heavy objects.

[0002]

2. Description of the Related Art A heavy duty vehicle of this type includes a plurality of trucks traveling on tracks, a vehicle body mounted on the trucks, a boom provided on the vehicle body so as to be capable of extending and contracting in the horizontal direction, and a hanging tool provided at the tip of the boom. And consists of. With the load hoisted, the boom is extended and retracted horizontally or a heavy vehicle is run to transfer the load. In this type of crane, the hoisting height cannot be secured because the boom bends downward when hoisting a load. Therefore, the boom is provided rotatably in the vertical direction, and the amount of flexure of the boom is detected to lower the other end of the boom, whereby the boom is tilted upward to ensure the lift. . (JP-A-57-151586
In a railroad vehicle for work, spherical bearings are used at the connecting portion between the vehicle body and the bogie, and hydraulic cylinders are arranged on both sides of the rolling bearing. Is known to keep horizontal. (Japanese Patent Publication No. 61-19470)

[0003]

Problems to be Solved by the Invention JP-A-57-1515
In Japanese Patent Publication No. 86, the lifting height of the load can be secured, but since the other end side of the boom is lowered toward the vehicle body to incline the boom, the boom can be turned to lift the load at the other end side of the vehicle body. You can't.

SUMMARY OF THE INVENTION An object of the present invention is to ensure a specified lifting height in a steerable vehicle capable of hoisting a load on both ends of a vehicle body.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to equip the vehicle body with a boom that can selectively project from both ends in the longitudinal direction of the vehicle body and that can lift a load, and the vehicle body and a plurality of bogies are spherical bearings. And expansion / contraction means for connecting the respective bogies and the vehicle body are installed on both sides of the respective spherical bearings in the width direction of the vehicle body, and the respective spherical bearings and the vehicle body or the bogie are connected. And a jack that raises the vehicle body is installed between and.

[0006]

When the load is lifted from the boom, the jack between the bogie on the side projecting the boom and the vehicle body is operated to raise the vehicle body on the side projecting the boom. The jack between the trolley on the other side and the car body is not activated. For this reason, the boom rises obliquely upward to the protruding side, the tip of the boom rises more than when both jacks are operated, and it is possible to further compensate for the boom lowering due to hanging of the load.

[0007]

EXAMPLE An example of the present invention will be described with reference to FIGS.
In FIG. 1, a steered vehicle is a bogie 3, 3 traveling on a rail 1 by wheels 2, a car body 4 mounted on the car 3, swivels 6, 6 installed at both longitudinal ends of the car body 4, Stand 6
And a boom 5 that is horizontally extendable and retractable. The boom 5 is provided with a hoisting device, and raises and lowers a suspender at the tip.

A rack (not shown) is provided along the longitudinal direction of the boom 5, and gears (not shown) meshing with the rack are installed on the swivel bases 6 and 6. The boom 5 expands and contracts by rotating the gear with a motor.

In FIG. 1, the boom 5 is a swivel base 6 on the right side.
However, in order to set this on the left swivel base 6, the boom 5 is retracted while the right swivel base 6 is horizontally swung, and the tip of the boom 5 is inserted into the boom insertion hole of the left swivel base 6. Turn. The hoisting gear of the boom 5 is raised. Then, the boom 5 is projected and inserted into the swivel base 6 insertion hole on the left side. Further, the motor of the left swivel base 6 is driven to move the boom 5 to the left swivel base 6. As a result, the boom 5 can be selectively projected to both ends of the vehicle body 4 in the longitudinal direction. Lifting of the load is mainly performed in a state where it is projected to one side in the longitudinal direction of the vehicle body. The insertion hole may be open at the upper side as long as the boom 5 can be pointed up, down, left and right. The connecting portion between the bogies 3 and 3 and the vehicle body 4 is provided with a spherical bearing or the like, and has the configuration shown in FIG.

In FIG. 2, a hydraulic jack 7 is fixed downward at the center of the vehicle body 4 in the width direction, and an upper slide plate 8 having a spherical surface having a convex shape at the lower end is provided at the lower end which is the tip thereof. On the other hand, on the other hand, on the upper surface of the carriage 3 arranged on the lower side,
The lower slide plate 9 having a concave spherical surface with the same radius as the upper slide plate 8 is attached. This hydraulic jack 7
A pair of double rod-shaped hydraulic cylinders 10a and 10b are arranged at symmetrical positions on both sides (both sides in the width direction of the vehicle body). The tips of the hydraulic cylinders 10a and 10b are rotatably fixed to the carriage 3 via spherical bushes 11a and 11b. Also, the hydraulic cylinders 10a and 10b
The trunnions 12a and 12b protruding from are rotatably attached to rotation blocks 15a and 15b rotatably attached to the vehicle body 4. Rotating block 15
a and 15b are rotatable by their trunnions 14a and 14b. The trunnions 12a and 12b are orthogonal to the trunnions 14a and 14b. This allows the hydraulic cylinders 10a and 10b to rotate in all directions.

Double rod type hydraulic cylinders 10a and 1
0b is connected as shown in the hydraulic circuit diagram of FIG. That is, a pipe 16a connecting the upper chamber of one hydraulic cylinder 10a and the lower chamber of the other hydraulic cylinder 10b,
On the contrary, the lower chamber of the hydraulic cylinder 10a and the hydraulic cylinder 10b
Piping 16b for connecting the upper chambers is provided, and each piping 1
6a and 16b are connected to a hydraulic device 18 via a three-way switching solenoid valve 17. One of the two pipes 19 a and 19 b from the hydraulic device 18 is connected to the hydraulic pump 20, and the other is connected to the tank 21. The three-way switching solenoid valve 17 has a central seal, one parallel circuit and the other cross circuit. Of the pair of pipes 22a and 22b extending from the solenoid valve 17, the pipe 22a is the pipe 16a.
And the pipe 22b is connected to the pipe 16b.

The hydraulic jack 7 is a three-way switching solenoid valve 1
It is connected to another high-voltage device 23 via 7. The three-way switching solenoid valve 17 has a central seal, one parallel circuit and the other cross circuit.

In such a structure, when the boom 5 is projected to one side in the longitudinal direction of the vehicle body 4 for cargo handling, the high pressure hydraulic device 23 on the side where the boom 5 is projected is operated to operate the hydraulic jack 7. . The rod of the hydraulic jack 7 is projected to a predetermined position. The other hydraulic jack 7 is not operated.

When the hydraulic jack 7 is operated, the upper slide plate 8 attached to the tip of the rod pushes down the lower slide plate 9 attached to the carriage 3. By the reaction, the car body 4
Can be lifted. Since the hydraulic jack 7 between the vehicle body 4 on the side opposite to the boom 5 and the bogie 3 is not used, the vehicle body 4 on the side opposite to the boom 5 cannot be lifted up. Therefore, the vehicle body 4 tilts in the longitudinal direction thereof and the boom 5 protruding from here. The tip of is further lifted. At this time, if the three-way switching solenoid valve 17 is left at the central sealing position, even if the vehicle body 4 is lifted and the pair of hydraulic cylinders 10a and 10b is forcibly extended,
Oil in the lower chamber of one hydraulic cylinder 10a flows into the upper chamber of the other hydraulic cylinder 10b, and on the contrary,
The oil in the lower chamber of b flows into the upper chamber of the hydraulic cylinder 10a.
Since the hydraulic cylinders 10a and 10b are of the double rod type, the amount of the moving oil is the same, and the strokes do not change and move in parallel.

At any position of the hydraulic jack 5, 3
When the one-way switching solenoid valve 17 is switched to a parallel circuit to apply hydraulic pressure to the pipe 22a, oil is sent to the upper chamber of the hydraulic cylinder 10a and the lower chamber of the hydraulic cylinder 10b. Therefore, the hydraulic cylinder 10a extends downward and the hydraulic cylinder 1
0b shrinks. As a result, the vehicle body 4 tilts to the right with respect to the carriage 3 as shown in FIG. When the three-way electromagnetic switching valve 17 is switched to the crossover circuit, the vehicle body 4 tilts to the left due to the opposite movement. This allows the vehicle body 4 to be horizontal in the width direction when the heavy duty vehicle is located in the cant of the rail 1.

Further, since the upper slide plate 8 and the lower slide plate 9 are engaged with each other on the spherical surface, the curve of the rail 1 in the vertical direction can be followed, and the carriage 3 is supported by the curved portion of the rail 1. Is allowed to turn.

According to the above embodiment, the vehicle body 4 can be moved up and down in parallel by moving only the hydraulic jack 7, and the tip of the boom 5 can be easily lifted. As a result, the amount of downward bending of the boom can be compensated even if the load is suspended from the boom 5, and the cargo can be easily handled.

By switching the three-way switching solenoid valve 17, the vehicle body 4 can be tilted with respect to the carriage 3.
Even if the rail 1 is provided with a cant, the vehicle body 4 can be stood vertically, and safe work can be secured.

[0019]

According to the present invention, the combination of the hydraulic jack and the hydraulic cylinder allows the vehicle body to be pushed up by the hydraulic jack while suppressing the inclination by the hydraulic cylinder.
You can easily lift the car body and boom. As a result, the bending of the boom caused by suspending the load at the tip can be corrected, and safe cargo handling can be performed.

[Brief description of drawings]

FIG. 1 is a perspective view of a heavy duty vehicle according to an embodiment of the present invention.

FIG. 2 is a sectional view of an essential part of an embodiment of the present invention.

FIG. 3 shows a state where a lifting and tilting device is operated in FIG.

FIG. 4 is a hydraulic circuit diagram of an embodiment of the present invention.

[Explanation of symbols]

3 ... Bogie, 4 ... Car body, 5 ... Boom, 6 ... Revolving base, 7 ... Hydraulic jack, 8 ... Upper slide plate, 9 ... Lower slide plate, 1
0a, 10b ... Hydraulic cylinders, 15a, 15b ... Rotation blocks.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Ichiro Nakajima 794 Azuma Higashitoyo, Shimomatsu, Yamaguchi Prefecture Inside the Kasado Plant, Hitachi Ltd. (72) Inventor Tsuyoshi Yoshimoto 2-6 Yoyogi, Shibuya-ku, Tokyo Tohnichi Honsen Railway Co., Ltd. Tokyo Construction Office (72) Inventor Tetsuo Omori 1-8-2 Marunouchi, Chiyoda-ku, Tokyo Japan Railway Vehicle Industry Association

Claims (4)

[Claims] 1. A boom for hoisting a load, which can selectively project from both longitudinal ends of a vehicle body, is provided on the vehicle body, and the vehicle body and a plurality of bogies are connected by spherical bearings. The expansion and contraction means for connecting the respective bogies and the vehicle body are installed on both sides of the respective spherical bearings in the direction, and the jack for raising the vehicle body is provided between the respective spherical bearings and the vehicle body or the bogie. A heavy-duty vehicle characterized by having a. 2. The vehicle according to claim 1, wherein the expanding / contracting means is a double rod type hydraulic cylinder, and an upper chamber of one hydraulic cylinder and a lower chamber of the other hydraulic cylinder are connected by a first pipe. The lower chamber of the one hydraulic cylinder and the upper chamber of the other hydraulic cylinder are connected by a second pipe, and the hydraulic pressure of the hydraulic device is controlled by the three-way switching solenoid valve. And the second pipe, and the sealing is made possible. 3. The vehicle according to claim 1, wherein the expanding / contracting means is a hydraulic cylinder, and the hydraulic cylinder has a rod end connected to the trolley via a spherical bush.
The hydraulic cylinder has a trunnion of its cylinder part rotatably attached to a rotating block rotatably installed on the vehicle body, and the rotating block is rotatably installed on the vehicle body through the trunnion. A steerable vehicle, wherein the trunnion of the block and the trunnion of the cylinder section are orthogonal to each other. 4. A boom for hoisting a load, which can selectively project from both ends in the longitudinal direction of the vehicle body, is provided on the vehicle body, and the vehicle body and a plurality of bogies are connected by spherical bearings. The expansion and contraction means for connecting the respective bogies and the vehicle body are installed on both sides of the respective spherical bearings in the direction, and the jack for raising the vehicle body is provided between the respective spherical bearings and the vehicle body or the bogie. When hoisting a load, the jack located on the truck on the side where the boom is projected is operated to raise the vehicle body, and then the cargo is loaded by the boom. How to drive a heavy duty vehicle.