JPH0227482B2 - NORIMENSHORYOSAGYOSHANOMAKIAGESOCHI - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention is applied to asphalt fibers used for paving when treating slopes, for example, when paving slopes for construction of dams, waterways, roads, seawalls, etc. This invention relates to a hoisting device consisting of a winch for hoisting up and lowering a work vehicle such as a snowcutter along a slope.

(Conventional technology) For example, when constructing a dam by paving a slope, a self-propelled hoist is placed on a path provided across the slope, and a winch mounted on the hoist is used to asphalt finishers, etc. Paving the slope while hoisting the work vehicle, and when paving one row is completed, move the hoist to lower the work vehicle to the lowest position on the slope to be paved, and repeat the process of paving while hoisting the work vehicle up again. It is necessary to pave the area by using In this case, the boundary line between the paved surface and the unpaved surface is not necessarily a straight line, but may be a curved line, so as described in Japanese Patent Publication No. 49-21932, it is necessary to simply use a winch. It is difficult to hoist the work vehicle along the boundary line by simply hoisting it up and lowering it, resulting in overlapping paved surfaces or areas where the paving material cannot be paved.

(Problems to be Solved by the Invention) When the working vehicle is hoisted up and lowered by a winch on a hoisting machine, the present invention provides for hoisting the working vehicle along the boundary line between the treated surface and the untreated surface. It is an object of the present invention to provide a hoisting device for a work vehicle for slope treatment, which is configured to be able to be lowered, and to be able to be lowered straight to a target value when lowering the work vehicle to a processing start point. It is something to do.

(Means for Solving the Problems) The hoisting device for a slope treatment vehicle of the present invention has two methods for hoisting and lowering a slope treatment vehicle along a slope.
The winches of the same type are mounted on the left and right sides of the hoisting machine,
A wire rope wound around each winch is connected to the left and right ends of the traction frame at the front of the work vehicle, and the hydraulic circuit of the drive hydraulic motor of each winch is connected to the hydraulic oil supplied to both hydraulic motors. It is characterized by providing a flow dividing device that makes the flow rate equal, and also providing a two-position switching valve between the circuits corresponding to each hydraulic motor between the flow dividing device and the hydraulic motor for communicating and cutting off both circuits. shall be. That is, in the hoisting device of the present invention, when operating the left and right winches in the hoisting direction, the two-position switching valve is placed in a position where the circuits to the left and right winch motors communicate with each other, thereby making it easier for the operator of the work vehicle to operate the winches. The direction of the working vehicle can be changed by operating the handle, so that the working vehicle can move along the boundary line, while the two-position switching valve is set to the cutoff position when lowering the vehicle. Therefore, the same flow rate of hydraulic oil is supplied to the two winch motors of the same type, and the wire ropes wound around the left and right winches are paid out in equal lengths, so that the work vehicle can be lowered while traveling in a straight line. This is what I did.

(Example) The details of the present invention will be explained below using examples shown in the drawings. Figures 2 and 3 show a state in which slope paving is being performed using a hoist equipped with the hoisting device of the present invention, where 1 indicates the slope to be paved, 2
is a path for a hoist formed on a part of a slope; in this example, one side of the path 2 is also formed as a slope 3, but the path 2 may be the top of a bank. 4
1 is a winding machine for treating sloped surfaces, and the winding machine 4 has a winding machine main body 7 mounted on a crawler-type traveling body 5 via a swing device 6 so as to be rotatable. An asphalt finisher 8 having a steering means is mounted on the main body 7.
winches 9A and 9B that wind up and lower the buggy truck 10 along the slope 1 via ropes 19a and 19b, a winch 11 that raises and lowers the buggy truck 10 via ropes 21a and 21b, an asphalt finisher 8, and a buggy truck. loading platform 12 on which 10 are placed, respectively;
It is equipped with 13. The loading platform 12 of the asphalt finisher 8 is attached to the main body 7 so as to be rotatable in the vertical direction around a pin 14 by a hydraulic cylinder 15.
is installed so that it can move up and down via a link mechanism 16,
When the hydraulic cylinder 17 is contracted, the tip of the loading platform 13 is placed on the loading platform 12, and when the hydraulic cylinder 17 is extended, it can rise and assume a substantially horizontal position. ing. Reference numeral 18 denotes a driver's cab attached to the side of the mounting portion of the loading platform 12 of the main body 7.

The feature of the present invention is the hoisting device of the asphalt finisher 8, and the winches 9A and 9B mounted on the left and right sides of the main body 7 have the same type of hydraulic motors 9a and 9b and drums 9c and 9d, respectively. Then, the wire ropes 19a and 19b that are wound and let out by the winches 9A and 9B, respectively, are
It is connected to the left and right ends of a traction frame 20 provided at the front of the asphalt finisher 8, respectively.
FIG. 1 shows a hydraulic circuit for variable displacement hydraulic motors 9a and 9b that operate winches 9A and 9B.
2A and 22B are control devices 23A and 23B, respectively.
The variable displacement hydraulic pump is a variable displacement hydraulic pump, both or one of which is activated by a control signal 24, and its discharge side pipes 27A, 27B are connected to a common pipe 28. Reference numeral 25 denotes a directional switching valve for switching the oil passages to the hydraulic motors 9a and 9b, its two primary ports are connected to the pipe line 28 and tank 29, respectively, and its two secondary ports are connected to the pipe line 3, respectively.
0, 31, of which one pipe 30
are connected to the inlet/outlet c, d of each of the hydraulic motors 9a, 9b via pipes 30A, 30B provided with a flow dividing device 26, and the other pipe 31 is connected to each check valve of the counterbalance valves 32A, 32B, respectively. The valves 34A, 34B and the relief valves 35A, 35B are connected to the other inlet/outlet e, f of the hydraulic motors 9a, 9b via a parallel circuit. The flow dividing device 26 includes hydraulic motors (or hydraulic pump motors) 26A and 26A inserted into the pipes 30A and 30B, respectively.
By directly connecting the shafts of 26B through a coupling 26C, the flow rates of the hydraulic oil flowing into the pipes 30A and 30B are made equal. Reference numeral 33 denotes a two-position switching valve that connects and disconnects the portions of these pipes 30A and 30B between the flow dividing device 26 and the hydraulic motors 9a and 9b.

In this device, when paving the slope 1, the operator in the cab 18 uses the winch 9A,
By driving 9B and 11, the asphalt finisher 8 is slowly rolled up and paved, and the buggy truck 10 is moved back and forth between the asphalt supply vehicle (not shown) and the asphalt finisher 8 to pave the asphalt finisher. The work is carried out while supplying asphalt to 8. In this case, the operator in the driver's cab 18
At the same time as operating one of the hydraulic motors 9a and 9b, the control section of the hydraulic motors 9a and 9b is switched to the low speed side, the directional switching valve 25 is switched to the right position, and the 2-position switching valve 3 is switched to the right position.
3 to position a (communication position). As a result, the hydraulic pressure discharged from either of the hydraulic pumps 22A, 22B passes through the pipe line 31, the pipe lines 31A, 31B, and the check valves 34A, 34B of the counterbalance valves 32A, 32B, respectively, to the hydraulic motor 9.
a, 9b, these hydraulic motors 9a,
The hydraulic oil that exits 9b passes through pipes 30A and 30B,
The oil in the pipe line 30A (or 30B) with a higher oil flow rate passes through the two-position switching valve 33 and is transferred to the other pipe line 30B.
(or 30A), and then returns to the tank 29 through the flow dividing device 26, the pipe line 30, and the directional switching valve 25. Therefore, the flow rate flowing to the hydraulic motors 9a, 9b can be changed, and the operator on the asphalt finisher 8 can change the direction of the asphalt finisher 8, thereby changing the direction between the paved area and the unpaved area of the asphalt. It can be moved in an upward direction along the boundary line between.

After paving the area (one row) that can be paved by the asphalt finisher 8 in this way, as shown in FIG.
is placed on the loading platform 13, and the hydraulic cylinder 17 is extended to raise the loading platform 13 to open a space for accommodating the asphalt finisher 8. Next, the winches 9A and 9B are used to wind the ropes 19a and 19b and raise the loading platform. An asphalt finisher 8 is placed on the platform 12, a hydraulic cylinder 15 is extended to float the tip of the loading platform 12, and a hydraulic motor for driving the traveling body 5 is operated to move the main body 7 by one row of paving work.

Next, the loading platform 12 is lowered by contracting the hydraulic cylinder 15, the directional switching valve 25 is switched to the left position, and the 2-position switching valve 33 is moved to the b position (blocking position).
Then, both the hydraulic pumps 22A and 22B are operated, and the control section of the hydraulic motors 9a and 9b is switched to the high speed side. As a result, the hydraulic pump 22
The hydraulic pressure discharged from A and 22B is supplied to the hydraulic motors 9a and 9b through the pipe line 30, the flow dividing device 26, and the pipe lines 30A and 30B, respectively, and the hydraulic oil discharged from these hydraulic motors 9a and 9b is supplied to the counter balance valve. It passes through the relief valves 35A, 35B of 32A, 32B and the pipes 31A, 31B, respectively, and then returns to the tank 29 through the pipe 31 and the directional switching valve 25. Therefore, the flow rates flowing to the hydraulic motors 9a, 9b are equal, and the winches 9A, 9B rotate at a constant speed, so the wire ropes 19a, 19b are let out at a constant speed and at a higher speed than when hoisting the asphalt finisher 8. descends linearly on slope 1,
It can be lowered to a precise position.

An operator is also on board the buggy truck 10 and can control the direction of travel, and by using radio signals, the operators of the asphalt finisher 8 and the buggy truck 10 can control the winch 9, respectively.
A, 9B and winch 11 can also be operated. Further, a vibrating roller for asphalt compaction may be installed behind the asphalt finisher 8.

In the above embodiment, the case where the work vehicle is an asphalt finisher is shown, but the present invention can also be applied to cases where the paving material is concrete or other processing work vehicles that process rows on slopes. can be applied.

(Effects of the Invention) According to the present invention, when a working vehicle is hoisted up and lowered by a winch on a hoisting machine, the working vehicle is hoisted up and lowered along the boundary line between the treated surface and the untreated surface. In addition, when lowering the work vehicle to the processing start point, it can be lowered straight to the target value. Therefore, unprocessed or duplicated processing can be avoided, and slope surface processing can be carried out efficiently and accurately. Further, as described in the embodiment, efficiency can be further improved by lowering the work vehicle at high speed when lowering it to the processing start point.

[Brief explanation of drawings]

FIG. 1 is a hydraulic circuit diagram of a hoisting winch motor showing an embodiment of the present invention, and FIG. 2 is a side view showing a state in which a hoisting machine to which the present invention is applied is performing paving work. FIG. 3 is a plan view thereof, and FIG. 4 is a side view showing its posture during movement.

Claims (1)

[Claims] 1. Two winches of the same type are mounted on the left and right sides of the hoist for hoisting and lowering a processing vehicle having a steering means along a slope, and wire ropes wound around each winch are mounted on the left and right sides of the hoist. A flow dividing device is connected to the left and right ends of the traction frame at the front of the work vehicle, and in the hydraulic circuit of the drive hydraulic motor of each winch, the flow rate of hydraulic oil supplied to both hydraulic motors is equalized. A working vehicle for slope treatment, characterized in that a two-position switching valve is provided between the circuits corresponding to each hydraulic motor between the flow dividing device and the hydraulic motor, for communicating and cutting off both circuits. hoisting device. 2. The hydraulic motor is a variable displacement motor,
The working vehicle for slope treatment according to claim 1, wherein a plurality of hydraulic pumps serving as a hydraulic pressure source for the hydraulic motor are installed in parallel so that the number of pumps to be driven can be selected. hoisting device.