JPH0819156A - Cable winding apparatus - Google Patents

Abstract

PURPOSE:To eliminate damage of cable and cable reel and associated dangerous works in regard to a cable winding apparatus which is used as a working vehicle such as concrete blowing vehicle. CONSTITUTION:A cable winding apparatus comprises a running vehicle, a cable reel, a cable, a hydraulic motor 5, an electromagnetic proportional control valve 6, a vehicle speed detector 7 and a controller 8. The apparatus particularly comprises an electromagnetic proportional control valve 6 for controlling an oil pressure tol a hydraulic motor 5, a vehicle speed detector 7 for detecting the speed of running vehicle and a controller 8 for controlling the electromagnetic proportional control valve 6 based on an electric signal from the vehicle speed detector 7 in order to automatically wind and feed he cable depending on the vehicle speed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a cable winding device applied to a work vehicle such as a concrete spray vehicle.

[0002]

2. Description of the Related Art Conventionally, as this type of cable winding device, for example, those shown in FIGS. 2 and 4 are known.
The cable winding device 50 is basically the traveling vehicle 5
1 and a cable reel 52 rotatably provided on the 1
A cable 53 wound around it, a hydraulic motor 54 for rotating the cable reel 52, a manual switching valve 55 for switching the pressure oil to the hydraulic motor 54, and a variable throttle for adjusting the flow rate of the pressure oil to the hydraulic motor 54. And a valve 56. The traveling vehicle 51 is a working vehicle such as a concrete spray vehicle used in a tunnel, and the cable reel 52
Is provided on the rear side of the traveling vehicle 51, and the tip of the cable 53 wound around the vehicle is connected to the power receiving panel on the power supply side. Thus, in such a device, after the initial flow rate is adjusted by the variable throttle valve, the manual switching valve is operated to drive the hydraulic motor to rotate, and the cable reel is rotated to wind or repeat the cable. When the operator operates the accelerator lever and the speed stage while watching the movement of the cable, the vehicle speed of the traveling vehicle is adjusted to the winding or unwinding speed of the cable. And the traveling vehicle is
The cable is fed out (about 100 m) while moving forward, and the spraying work is performed at the tip of the tunnel. After the work, the cable is wound while moving backward. However, in such a thing, since the vehicle speed is adjusted by the manual operation of the operator to match the winding or unwinding speed of the cable, it is difficult to match the vehicle speed and the winding or unwinding speed of the cable,
Since the cable was loose and stepped on the wheel of the traveling vehicle or the cable was pulled too much, damage to the cable and the cable reel and accompanying dangerous work were likely to occur.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems and was devised in order to solve the problems. The purpose of the present invention is to damage cables and cable reels and the associated risks. (EN) Provided is a cable winding device which eliminates the work.

[0004]

The cable winding device of the present invention basically comprises a traveling vehicle, a cable reel rotatably provided on the traveling vehicle, and a cable wound around the cable reel. The hydraulic motor that rotates the cable reel, the electromagnetic proportional control valve that controls the pressure oil to the hydraulic motor, the vehicle speed detector that detects the vehicle speed of the traveling vehicle, and the electromagnetic proportional control valve based on the electrical signal from the vehicle speed detector are installed. The feature is that it is composed of a controller that controls.

[0005]

[Operation] The vehicle speed of the traveling vehicle is detected by the vehicle speed detector,
The controller controls the electromagnetic proportional control valve based on the electric signal from the vehicle speed detector, which controls the pressure oil to the hydraulic motor, and the hydraulic motor rotates the cable reel to wind or unwind the cable. To be done. When the traveling vehicle is stopped, the controller stops the rotation of the cable reel,
When the traveling vehicle moves forward, the cable reel rotates in the payout direction in proportion to the vehicle speed, and when the traveling vehicle moves backward, the cable reel rotates in the winding direction in proportion to the vehicle speed. To control.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a hydraulic circuit diagram showing a cable winding device according to an embodiment of the present invention. FIG. 2 is a side view showing a work vehicle equipped with the cable winding device. FIG. 3 is a graph showing the relationship between current and flow rate. The cable winding device 1 includes a traveling vehicle 2, a cable reel 3, a cable 4, a hydraulic motor 5,
The electromagnetic proportional control valve 6, the vehicle speed detector 7, and the controller 8 constitute the main part. The traveling vehicle 2 is a basic part of the cable winding device 1. In this example, the traveling vehicle 2 is a working vehicle such as a concrete spray vehicle used in a tunnel. The vehicle body 9 is provided with the engine and wheels. And the like, and the front side of the vehicle body 9 (left side in FIG. 2).
Work equipment 11 such as concrete spraying equipment
And a driver's seat 12 and the like provided near the front of the vehicle body 9. The cable reel 3 is rotatably provided on the traveling vehicle 2. In this example, the cable reel 3 is provided on the rear left side of the vehicle body 9 of the traveling vehicle 2 so as to be rotatable around the horizontal axis. The cable 4 is wound around the cable reel 3, and in this example, it is an electric cable, and although not shown,
The base end is connected to an electric load such as an electric motor mounted on the traveling vehicle 2 through a rotating brush provided on the rotating portion of the cable reel 3, and the tip is connected to a power receiving panel installed on the power supply side. The cable reel 3 is wound halfway. The hydraulic motor 5 rotates the cable reel 3. In this example, the hydraulic motor 5 is a constant displacement type that is rotated by pressure oil from the hydraulic pump P, and includes two check valves and two relief valves. Overload relief valve 1
Is connected to the solenoid proportional control valve 6 via 3 and
A stop valve 14 is connected so that it can be bypassed. The electromagnetic proportional control valve 6 controls the flow rate to the hydraulic motor 5. In this example, it is a solenoid operated 6-port 3-position type, and changes in current based on the relationship between the current and the flow rate shown in FIG. The one that adjusts the flow rate is used, and the pressure compensation valve 15 composed of two relief valves and a throttle valve,
It is connected to the hydraulic pump P and the tank T via a manually operated 4-port 2-position switching valve 16. The vehicle speed detector 7
The vehicle speed of the traveling vehicle 2 is detected, and in this example, a rotary encoder that picks up the number of rotations of a transmission or a wheel that constitutes the traveling device 10 of the traveling vehicle 2 is used. The controller 8 controls the electromagnetic proportional control valve 6 based on the electric signal from the vehicle speed detector 7. In this example,
Electromagnetic proportional control valve 6 based on electric signal from vehicle speed detector 7
It is designed to control both solenoids of
When the traveling vehicle 2 moves forward, the cable reel 3 rotates in the feeding direction in proportion to the vehicle speed of the traveling vehicle 2, and when the traveling vehicle 2 moves backward, the cable reel 3 rotates in proportion to the vehicle speed of the traveling vehicle 2. The reel 3 is adapted to be rotated in the winding direction.

Next, the operation will be described based on such a configuration. First, the switching valve 16 is switched to the lower position shown in FIG. 1 so that the cable winding device 1 can be operated. In such a state, the vehicle speed of the traveling vehicle 2 is detected by the vehicle speed detector 7, and the vehicle speed detector 7 is detected by the controller 8.
The electromagnetic proportional control valve 6 is controlled based on the electric signal from
By this, the pressure oil to the hydraulic motor 5 is controlled, the cable reel 3 is rotated by the hydraulic motor 5, and the cable 4 is wound or unwound. The controller 8 stops the rotation of the cable reel 3 when the traveling vehicle 2 is stopped, and when the traveling vehicle 2 moves forward, the controller 8 is proportional to the vehicle speed.
Is rotated in the feeding direction, and when the traveling vehicle 2 is moving backward, the electromagnetic proportional control valve 6 is controlled so that the cable reel 3 is rotated in the winding direction in proportion to the vehicle speed. In other words, the vehicle speed of the traveling vehicle 2 is changed by changing the current by picking up the number of rotations of the transmission or wheels, and the change in the current is converted into the flow rate (see FIG. 3). Then, the electromagnetic proportional control valve 6 is used, and the current is set to the rotation speed of the hydraulic motor 5 of the cable reel 3 in accordance with the vehicle speed, whereby the so-called vehicle speed-sensitive type cable winding device 1 is obtained. .

Although the electromagnetic proportional control valve 6 adjusts the flow rate by changing the current in the above embodiment, the present invention is not limited to this, and the flow rate may be adjusted by changing the voltage, for example. In the above-described embodiment, the electromagnetic proportional control valve 6 has an overlap in the relationship between the current and the flow rate as shown in FIG. 3 and the linearity of the current value and the flow rate value is not sufficient, but the present invention is not limited to this. There is nothing to do.

[0009]

As described above, according to the present invention,
The following excellent effects can be achieved. (1) An electromagnetic proportional control valve that is composed of a traveling vehicle, a cable reel, a cable, a hydraulic motor, an electromagnetic proportional control valve, a vehicle speed detector, and a controller, and in particular, an electromagnetic proportional control valve that controls pressure oil to the hydraulic motor, and a vehicle speed of the traveling vehicle A vehicle speed detector that detects the speed and a controller that controls the electromagnetic proportional control valve based on an electric signal from the vehicle speed detector are provided so that the cable can be automatically wound or unwound according to the so-called vehicle speed. Therefore, it is possible to eliminate the damage to the cable and the cable reel and the dangerous work associated therewith. (2) Since the cable can be automatically wound or unwound according to the vehicle speed, the driving operation of the traveling vehicle is facilitated and the operator's fatigue can be reduced.

[Brief description of drawings]

FIG. 1 is a hydraulic circuit diagram showing a cable winding device according to an embodiment of the present invention.

FIG. 2 is a side view showing a work vehicle equipped with a cable winding device.

FIG. 3 is a graph showing the relationship between current and flow rate.

FIG. 4 is a hydraulic circuit diagram showing a conventional cable winding device.

[Explanation of symbols]

1, 50 ... Cable winding device, 2, 51 ... Traveling vehicle,
3, 52 ... Cable reel, 4, 53 ... Cable, 5,
54 ... Hydraulic motor, 6 ... Electromagnetic proportional control valve, 7 ... Vehicle speed detector, 8 ... Controller, 9 ... Car body, 10 ... Traveling device, 11 ... Working device, 12 ... Driver's seat, 13 ... Overload relief valve, 14 … Stop valve, 15… Pressure compensation valve, 16
... switching valve, P ... pump, T ... tank, 55 ... manual switching valve, 56 ... variable throttle valve.

Claims (1)

[Claims] 1. A traveling vehicle, a cable reel rotatably provided on the traveling vehicle, a cable wound around the cable reel, a hydraulic motor for rotating the cable reel, and pressure oil to the hydraulic motor. An electromagnetic proportional control valve,
A cable winding device comprising a vehicle speed detector for detecting a vehicle speed of a traveling vehicle and a controller for controlling an electromagnetic proportional control valve based on an electric signal from the vehicle speed detector.