JPH092783A - Outrigger device of track traveling crane - Google Patents

Abstract

PURPOSE: To enable tracts traveling front and rear wheels to match a track without performing the longitudinal-steering by tires, by adding a function for freely moving the track traveling crane in the floating state in the width direction to an outrigger device of the track traveling crane. CONSTITUTION: When a track traveling crane in the floating state is moved to the left, opening and closing valves 24a, 24a are closed, an opening and closing valve 27 is opened, and pressure chambers on rod sides of horizontal cylinders 15a, 15b provided on right and left outrigger devices are communicated with each other through a second communication pipe 28. Next, when solenoid valves 22 are switched to the right side, operating oil is allowed to flow into the pressure chamber on the head side of the right side horizontal cylinder 15b through first and second branched supplying pipes 21a, 21b so as to move the rod to the right, and operating oil in the pressure chamber on the rod side is allowed to flow into the pressure chamber on the rod side of the left side horizontal cylinder 15a, so as to contract the rod. As a result, the track traveling crane in the floating state is moved to the right side direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of an orbiting crane, and more particularly, to an outrigger of an orbiting crane capable of horizontally moving a levitated orbiting crane horizontally. Regarding the device.

[0002]

2. Description of the Related Art As is well known, in the railroad industry, in order to carry out crane work on a track, in addition to a mobile crane that can travel only on a normal road, a track that can travel on a road and on a track. A traveling crane is used. An outline of such an orbital traveling crane is shown in FIG. 4 which is a side view showing a traveling state on the road, and in FIG. 5 which is a side view showing the traveling state on the orbit.
Describing with reference to
Is a traveling carriage described later, and above this traveling carriage 1,
A swivel frame 2 is mounted which is rotatable about a vertical axis, has a driver's cab 2a, and supports a multistage telescopic boom 3 having a hook 3a for suspending a suspended load at its tip end so as to be capable of undulating.

Next, a schematic structure of the traveling vehicle 1 will be described.
Although the traveling carriage 1 is substantially bilaterally symmetrical, only one side surface (left side surface) is shown in these drawings, and therefore only the portion shown on this one side surface will be described below. That is, the front tire 4 and the rear tire 5 for traveling on the road or the like are provided below the front and rear of the traveling vehicle 1. Further, front track running wheels 6 rolling on the track L are provided on the front side of the front tire 4, and track running rear wheels 7 rolling on the track L are provided on the rear side of the rear tire 5. The orbital front wheel 6 is supported by the tip of the repellant front leg 8, and the orbital rear wheel 7 is supported by the tip of the repellant rear leg 9.

That is, when such an orbital traveling crane travels on the orbit L, as shown in FIG. 5, the repelling front leg 8 and the repelling rear leg 9 are swung downwards to move the orbiting front wheels. 6 and the rear wheel 7 running on the track are brought into contact with the track L, and the repelling front leg 8 and the repelling rear leg 9 are fixed by a fixing device (not shown) to travel on the track L. Further, when traveling on a road or the like, as shown in FIG. 4, the repelling front leg 8 and the repelling rear leg 9 are swung upward to float the orbiting front wheel 6 and the orbiting rear wheel 7. At the same time, the repelling front leg 8 and the repelling rear leg 9 are fixed by a fixing device (not shown), and the front tire 4 and the rear tire 5 travel on the road or the like.

Incidentally, the front track running wheels 6 are for driving, and the front track running wheels 6 are configured to be braked by a brake 6a. Outrigger devices 10, 10 having a configuration described later are provided in front of and behind the traveling carriage 1 in the vicinity of the lift-up front leg 8 and the lift-up rear leg 9.

The structure of such an outrigger device will be described below. However, since the front outrigger device 10 and the rear outrigger device 10 have exactly the same configuration,
The one-sided outrigger device 10 will be described. That is, the outrigger box 11 is attached to the chassis of the traveling carriage 1.
Is provided, and the outrigger beam 12 is telescopically fitted therein. The outrigger beam 12 is provided in the outrigger box 11 and is expanded and contracted by expansion and contraction of a rod of a horizontal cylinder (not shown) by supplying and discharging hydraulic oil from a hydraulic circuit (not shown). At the tip of the outrigger beam 12, a jack cylinder 13 having a float 14 that contacts the roadbed is vertically fixed to the lower end of the rod.

Therefore, when performing crane work with the orbital traveling crane having the above-mentioned configuration, the front and rear wheels 7,
When the vehicle travels on the track L at 8 and arrives at the work site, the outrigger beams 12 of the front and rear outrigger devices 10, 10 are extended outward in the width direction of the traveling carriage 1. Next, by extending the rod of the jack cylinder 13 downward, the float 14 is grounded and the orbital traveling crane is levitated and supported, thereby ensuring the stability of the orbital traveling crane and performing a predetermined crane operation. When the crane work is completed, the rod of the jack cylinder 13 is contracted and the track traveling crane is lowered to bring the front and rear wheels 7 and 8 of the track into contact with the track L. Next, the outrigger beam 12 is stored in the outrigger box 11, and the pre-raceway / rear wheels 7 and 8 travel along the raceway L to return to a predetermined place.

[0008]

When the orbital traveling crane is levitated on the track to perform crane work, a guard tree or the like is laid on the roadbed where the float of the outrigger device is in contact with the ground, and the float is placed on the guard tree or the like. By contacting them, the orbiting crane is stabilized by preventing subsidence and tilting, but it is still 10 times before and after the orbiting crane.
A displacement of about 0 mm may occur. When such a positional deviation occurs, if the rod of the jack cylinder is reduced after the crane work is completed, one or both of the pre-raceway and rear wheels will be disengaged from the raceway.

In such a case, the position of the orbiting crane is adjusted so that the front wheels and the rear wheels are directly above the track by the front and rear operation by the tires. Plates such as iron plates must be laid in the moving range of the crane so as to be flush with the track. Such extra work is required even when there is a rush to remove a capsized vehicle.Therefore, it is desired to develop a track traveling crane that does not require such extra work and has excellent crane work efficiency. It was

Therefore, an object of the present invention is to provide an outrigger for an orbital traveling crane that enables the front wheels and the rear wheels to be aligned with the orbit before and after the traveling of the crane is not performed before and after the operation of the crane is completed. To provide the equipment.

[0011]

In view of the above-mentioned circumstances, the present invention provides an outrigger device for an orbiting crane by adding a function of freely moving a floating orbiting crane in the width direction thereof by using tires. This was done with the thought that it would be possible to match the front and rear wheels to the track without having to carry out front-rear operation.

Therefore, in order to solve the above-mentioned problems, the main means adopted by the outrigger device for an orbital traveling crane according to the present invention are characterized in that a swing frame for supporting the boom to be lifted is mounted on a road or the like. Equipped with horizontal cylinders provided at the front and rear in the traveling direction of a track traveling crane that includes tires that travel along the track and wheels that travel on the track, and that expands and contracts each of the left and right outrigger beams by supplying and discharging hydraulic oil by a hydraulic circuit. Along with, the orbital traveling crane comprising a telescopic jack cylinder that floats and supports the orbital traveling crane by extending the rod, in the hydraulic circuit, of the left and right horizontal cylinders that extend and retract each of the front and rear outrigger beams, Supply hydraulic oil to the head side of one of the horizontal cylinders, and The hydraulic oil flowing out flows into the rod side of the other horizontal cylinder, and the hydraulic oil flowing out from the head side of the other horizontal cylinder is returned to the hydraulic oil tank to extend the rod of the one horizontal cylinder and the other side. The horizontal movement hydraulic circuit that reduces the rod of the horizontal cylinder is added.

[0013]

According to the outrigger device for an orbital traveling crane according to the present invention, hydraulic oil is supplied to the head side of one horizontal cylinder by the hydraulic circuit, and the hydraulic oil flowing out from the rod side of the one horizontal cylinder is transferred to the other side. The hydraulic oil that flows into the rod side of the horizontal cylinder and flows out from the head side of the other horizontal cylinder is returned to the hydraulic oil tank, so that the rod of one horizontal cylinder extends and the rod of the other horizontal cylinder contracts. To do.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An outrigger device for an orbital traveling crane according to an embodiment of the present invention will be described below with reference to FIG. 1 of its hydraulic circuit diagram (for explaining the normal expansion and contraction operation of an outrigger beam) and its hydraulic circuit diagram (in a floating state). 2 for explaining the outrigger beam extension / contraction operation for horizontally moving the orbit traveling crane to the left side) and its hydraulic circuit diagram (for explaining the outrigger beam extension / contraction operation for horizontally moving the floating orbit traveling crane to the right side). 3) of FIG. 3). However,
The configuration of the orbiting crane and its outrigger device itself is
Since the structure is the same as that of the conventional example, only the description of the hydraulic circuit will be given.

Reference numerals 15a and 15a shown in FIGS.
Is a left-side horizontal cylinder of the outrigger device 10, 10 provided before and after the orbiting crane, and is denoted by reference numerals 15b, 15
Reference numeral b is a right horizontal cylinder of the front and rear outrigger devices 10, 10. Pipe lines, which will be described later, communicate with the pressure chambers on the head side and the rod side of each of these cylinders.

First, the first branch supply pipes 21a, 21a are branched from the middle of the hydraulic oil supply pipe 21 for supplying the hydraulic oil in the hydraulic oil tank 29 by driving the hydraulic pump 20, and the second branch supply is provided at the tip. The tubes 21b and 21b are branched. The first branch supply pipes 21a, 21a and the second branch supply pipes 21b, 21b of the hydraulic oil supply pipe 21 are electromagnetic switching valves 22, 22, at four ports and three positions, respectively.
22 and 22 communicate with the pump ports P. Further, from the tank port T of each electromagnetic switching valve 22, 22, 22, 22, the hydraulic oil return pipe 23 having the first branch return pipes 23 a, 23 a and the second branch return pipes 23 b, 23 b is connected to the hydraulic oil tank 29. Is in communication with.

From the pump ports P of the electromagnetic switching valves 22, 22, 22, 22 and the two actuator ports A, A on the opposite side of the tank port T, the head side and the bottom side of each horizontal cylinder are supplied. The exhaust pipes 24, 24 communicate with each other. The left and right horizontal cylinders 15a, 15a of the front and rear outrigger devices 10, 10 and the right horizontal cylinder 1
Supply and discharge pipe 2 communicating with the pressure chamber on the head side with 5b and 15b
4 and 24 are manually switched, and a three-way switching valve 25 for returning the hydraulic oil on the head side of the left horizontal cylinders 15a, 15a or the hydraulic oil on the head side of the right horizontal cylinders 15b, 15b to the hydraulic oil tank 29 is provided. The first communication pipes 26, 26 that are interposed are connected to each other.

Among the supply / discharge pipes 24, 24, the supply / discharge pipes 24, 2 communicating with the rod-side pressure chamber of the horizontal cylinder.
An opening / closing valve 24a which is opened by a manual operation when the outrigger beam is normally expanded and contracted and is closed by a manual operation when horizontally moving the floating orbit traveling crane is interposed in each of the four. There is. In this case, the manually operated on-off valve 24a is used, but this can be replaced with, for example, a pilot check valve having a known structure.

Further, the left horizontal cylinders 15a, 15a
And the pressure chambers on the rod side of the right horizontal cylinders 15b, 15b are connected to each other by second communication pipes 28, 28 in which an on-off valve 27 that is opened and closed by a manual operation is interposed. Has become. The reason why the three-way switching valve 25 and the on-off valve 27 are manually operated is only to avoid the cost increase of the orbital traveling crane, and the three-way switching valve 25 and the on-off valve 27 are electromagnetically switched type. It can be replaced with the open / close valve.

First, the normal operation of the outrigger device for expanding and contracting the outrigger beam will be described with reference to FIG. In this case, first, the left horizontal cylinders 15a, 15
a so that the hydraulic oil does not return to the hydraulic oil tank 29 from the rod side pressure chambers of the horizontal cylinders 15b and 15b.
The one-way switching valve 25 is set to neutral, the opening / closing valve 24a is opened, and the opening / closing valve 27 is set to neutral to shut off the second communication pipe 28.

Next, the left horizontal cylinders 15a, 15a
The electromagnetic switching valves 22 and 22 for controlling the hydraulic pressure are switched to the right side to supply hydraulic oil to the pressure chambers on the head side of the left side horizontal cylinders 15a and 15a via the first and second branch supply pipes 21a and 21b, and The hydraulic oil in the pressure chamber is returned to the hydraulic oil tank 29 via the first and second branch return pipes 23a and 23b, and at the same time, the electromagnetic switching valves 22 and 22 for controlling the right horizontal cylinders 15b and 15b are switched to the right side. Horizontal cylinder 1
Hydraulic oil is supplied to the head-side pressure chambers 5b and 15b through the first and second branch supply pipes 21a and 21b, and the hydraulic oil in the rod-side pressure chambers is supplied to the first and second branch return pipes 23a and 23b.
Return to the hydraulic oil tank 29 via. As a result, the rod of each horizontal cylinder extends, so that the outrigger beam in which the tip of this rod is pivotally attached is projected.

On the other hand, when the outrigger beam is reduced and stored in the outrigger box, the left horizontal cylinder 1
The electromagnetic switching valves 22 and 22 for controlling 5a and 15a are switched to the left side to supply hydraulic oil to the rod side pressure chambers of the left horizontal cylinders 15a and 15a via the first and second branch supply pipes 21a and 21b. The hydraulic oil in the pressure chamber on the head side is transferred to the hydraulic oil tank 29 via the first and second branch return pipes 23a and 23b.
At the same time, the electromagnetic switching valves 22 and 22 for controlling the right horizontal cylinders 15b and 15b are switched to the right side to connect the first and second branch supply pipes 21a and 21b to the pressure chambers on the head side of the right horizontal cylinders 15b and 15b. Supply hydraulic fluid via
The hydraulic oil in the pressure chamber on the rod side is supplied to the first and second branch return pipes 23.
Return to the hydraulic oil tank 29 via a and 23b. This causes the rod of each horizontal cylinder to contract, so that the outrigger beam is stored in the outrigger box.

Next, referring to FIG. 2, a case where the orbiting crane in the floating state is moved to the left will be described. First, the on-off valves 24a, 24a are closed, and the on-off valve 2
7 is opened to communicate the rod side pressure chambers of the left horizontal cylinders 15a, 15a and the right horizontal cylinders 15b, 15b via the second communication pipe 28, and the three-way switching valve 25 is switched to switch the left horizontal cylinder. The head side pressure chambers of 15a, 15a communicate with the hydraulic oil tank 29 via the first communication pipe 26 so that the hydraulic oil does not return to the hydraulic oil tank 29 from the head side pressure chambers of the right horizontal cylinders 15b, 15b. The first communication pipe 26 is shut off and the left horizontal cylinder 15
The solenoid operated directional control valves 22 and 22 for controlling a and 15a are kept in neutral.

Then, the right horizontal cylinders 15b, 15b
When the electromagnetic switching valves 22 and 22 for controlling the
Hydraulic oil supply pipe 21, first and second branch supply pipes 21a, 21
The hydraulic oil flows into the pressure chambers on the head side of the right horizontal cylinders 15b and 15b via b, and these right horizontal cylinders 1b
The rods 5b and 15b extend to the right. As a result, the hydraulic oil discharged from the rod-side pressure chamber is supplied to the second communication pipe 28,
The hydraulic fluid flowing from the pressure chambers on the head side of the left horizontal cylinders 15a, 15a into the pressure chambers on the rod side of the left horizontal cylinders 15a, 15a via the first communication pipe It is returned to the hydraulic oil tank 29 via 26. In this way, the left horizontal cylinder 15
Since the rods of a and 15a shrink and the rods of the right horizontal cylinders 15b and 15b extend, the orbiting crane in the floating state moves to the left.

In the operation of the normal outrigger device 10, 10 described with reference to FIG. 1, all four electromagnetic switching valves 22, 22, 22, 22 are simultaneously operated, but in this case, the left horizontal Solenoid switching valves 22, 22 for controlling the cylinders 15a, 15a or the right horizontal cylinder 15b,
Since it is necessary to operate either one of the solenoid operated directional control valves 22 and 22 for controlling 15b,
A changeover switch is provided in the electric system for controlling 22, 22, 22.

Referring to FIG. 3, description will be given of a case where the orbital traveling crane in the floating state is moved rightward. FIG.
As is well understood from the above, this figure is the opposite of the left and right of FIG. Therefore, the left horizontal cylinders 15a, 15a
And the right side horizontal cylinders 15b, 15b are communicated with each other through rod-side pressure chambers, and the three-way switching valve 25 is switched to move the head side pressure chambers of the right side horizontal cylinders 15b, 15b through the first communication pipe 26. The first communication pipe 26 is connected to the tank 29 so that the hydraulic oil does not return to the hydraulic oil tank 29 from the pressure chamber on the head side of the left horizontal cylinders 15a, 15a.
And the electromagnetic switching valves 22 and 22 for controlling the right horizontal cylinders 15b and 15b are held in the neutral state.

The left horizontal cylinders 15a, 15a
By switching the electromagnetic switching valves 22 and 22 to the right side to supply the hydraulic oil to the pressure chamber on the head side of the left horizontal cylinders 15a and 15a via the hydraulic oil supply pipe 21 and the first and second branch supply pipes 21a and 21b. When inflowing, the rods of these left horizontal cylinders 15a, 15a extend leftward. As a result, the hydraulic oil coming out of the pressure chamber on the rod side will not flow into the second communication pipe 2
The hydraulic oil flowing from the pressure chambers on the head side of the right horizontal cylinders 15b and 15b into the first pressure chambers while flowing into the pressure chambers on the rod side of the right horizontal cylinders 15b and 15b via 8 and 28. Since it is returned to the hydraulic oil tank 29 via the communication pipe 26, the left horizontal cylinders 15 a, 1
The rod 5a extends and the right horizontal cylinder 15
Since the rods b and 15b contract, the orbiting crane in the floating state moves to the right.

Therefore, according to the outrigger device for an orbital traveling crane according to the present invention, before or after the jack cylinder is contracted, the orbital traveling crane is freely moved to the left and right in the width direction of the vehicle body so that the front and rear wheels can be moved. Since the vehicle can be located right above the track, it is not necessary to perform front-rear operation with tires so that the front wheels and the rear wheels are directly above the track as in the conventional case. Therefore, it is not necessary to carry out the plate laying work of laying plates such as iron plates so as to be flush with the track in the moving range of the orbital traveling crane on the roadbed, and the crane work efficiency can be improved.

[0029]

As described above in detail, according to the outrigger device for a track traveling crane according to the present invention, the rod of one horizontal cylinder extends and the rod of the other horizontal cylinder contracts. By extending one outrigger beam and contracting the other outrigger beam, it is possible to freely move the floating orbiting crane horizontally to the left and right, so that the front and rear wheels can be positioned right above the track. Unlike the conventional case, it is not necessary to carry out the front-rear operation with the tires so that the front wheels and the rear wheels are directly above the track. Therefore, unlike the conventional method, the extra work of laying down plates such as iron plates so as to be flush with the track in the movement range of the orbital traveling crane on the roadbed is not necessary, and the crane work efficiency is greatly improved. To do.

[Brief description of drawings]

FIG. 1 is a hydraulic circuit diagram for explaining a normal expansion / contraction operation of an outrigger beam of an outrigger device for a track traveling crane according to an embodiment of the present invention.

FIG. 2 is a hydraulic circuit diagram for explaining an outrigger beam expansion / contraction operation for horizontally moving the floating orbit traveling crane of the outrigger device for the orbit traveling crane according to the embodiment of the present invention to the left.

FIG. 3 is a hydraulic circuit diagram for explaining an outrigger beam extension / contraction operation for horizontally moving the floating orbiting crane of the outrigger device for the orbiting crane according to the embodiment of the present invention to the right.

FIG. 4 is a side view showing a road traveling state of a track traveling crane according to a conventional example.

FIG. 5 is a side view showing an on-orbit traveling state of the orbit traveling crane according to the conventional example.

[Explanation of symbols]

1 ... Traveling vehicle, 2 ... Revolving frame, 2a ... Driver's cab, 3 ...
Multi-stage telescopic boom, 3a ... Hook, 4 ... Front tire, 5
... rear tires, 6 ... front wheels on track running, 6a ... brakes, 7
… Rail running rear wheels, 8… Repelling front legs, 9… Releasing rear legs, 1
0 ... Outrigger device, 11 ... Outrigger box, 12
… Outrigger beam, 13… Jack cylinder, 14…
Float, 15a ... left side horizontal cylinder, 15b ... right side horizontal cylinder, 20 ... hydraulic pump, 21 ... hydraulic oil supply pipe,
21a ... 1st branch supply pipe, 21b ... 2nd branch supply pipe, 2
2 ... Electromagnetic switching valve, 23 ... Hydraulic oil return pipe, 23a ... First branch return pipe, 23b ... Second branch return pipe, 24 ... Supply / discharge pipe, 2
4a ... on-off valve, 25 ... 3-way switching valve, 26 ... first communication pipe,
27 ... On-off valve, 28 ... Second communication pipe, 29 ... Hydraulic oil tank, A ... Actuator port, L ... Orbit, P ... Pump port, T ... Tank port.

Claims (1)

[Claims] 1. A orbiting crane equipped with a swing frame for supporting a boom so that the boom can be lifted up and down, and is provided in front of and behind in the traveling direction of a track traveling crane including tires traveling on the road and wheels traveling on a track, and is provided by a hydraulic circuit. In an outrigger device for an orbiting crane, which is equipped with a horizontal cylinder that expands and contracts the left and right outrigger beams in the front and rear by supplying and discharging hydraulic oil, and an expandable jack cylinder that floats and supports the orbiting crane by extending the rod. Of the left and right horizontal cylinders that expand and contract the front and rear outrigger beams, the hydraulic circuit supplies hydraulic oil to the head side of one horizontal cylinder, and hydraulic oil flows out from the rod side of the one horizontal cylinder. Flow into the rod side of the other horizontal cylinder and flow out from the head side of the other horizontal cylinder. A hydraulic circuit for horizontal movement is added to extend the rod of the one horizontal cylinder and reduce the rod of the other horizontal cylinder by returning the hydraulic oil to the hydraulic oil tank. .