JPH0796222B2 - Wire saw drive - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire saw driving device, and more particularly to an engine driving type device.

[0002]

2. Description of the Related Art A wire saw method is disclosed, for example, in Japanese Examined Patent Publication No. 3-53426 as a method applied to the dismantling of concrete structures and the cutting of stone materials. The wire saw used in this type of construction has a structure in which a sintered body in which diamond particles are mixed is attached to the wire, and an endless wire saw is wrapped around the object to be cut and kept in a predetermined tension state. While running, cut the object.

As a basic structure of a wire saw driving device, there is provided a main sheave around which an endless wire saw is wound, and a drive device for rotationally driving the main sheave. The drive machine is an electric type such as an electric motor,
There are hydraulic type such as a hydraulic motor and engine driven type.The engine driven type varies depending on the size of the object to be cut and other conditions. It is used a lot. However, the conventional engine-driven wire saw driving device has been pointed out to have technical problems described below.

[0004]

That is, in the above-described conventional engine-driven wire saw driving device, the load applied to the wire saw at the initial stage of cutting becomes very large, so that the engine is started under a light or no load condition. However, a manual clutch is inserted between the engine and the main sheave so that the wire saw travels when it reaches a predetermined rotation state.

However, in such a method, the operator is in the vicinity of the drive device and operates the clutch, but in this type of construction method, especially when a load is applied to the wire saw at the start of cutting. , The wire saw is liable to be cut, and when the wire saw is cut, it jumps and is very dangerous, and the cutting chips are scattered due to the cutting of the wire saw, and the working environment near the drive device is bad The work below was strongly desired to be improved.

Further, in the wire saw method, the relative positional relationship between the object to be cut and the main sheave of the drive unit changes as the cutting progresses, and therefore the wires are usually changed a plurality of times during the cutting work. Although some work is required, the engine must be stopped and restarted at this time, and the above work must be done each time.

The present invention has been made in view of the above conventional problems, and an object thereof is a wire saw capable of eliminating work in a dangerous state or a deteriorated work environment as much as possible. It is to provide a drive device.

[0008]

In order to achieve the above object, the present invention provides a wire saw driving device having a main sheave around which an endless wire saw is wound, and an engine for rotationally driving the main sheave. A torque converter that causes a slip depending on a load is provided between the engine and the main sheave.

The engine is installed on a movable carriage, and can be controlled by a radio receiver installed on the carriage and a radio transmitter installed at a place distant from the carriage.

[0010]

According to the wire saw driving device having the above structure, the torque converter whose slip amount changes according to the load is provided between the engine and the main sheave around which the endless wire saw is wound. Therefore, when power is supplied to the engine to start the engine in a state where the engine speed is set to a predetermined value, a smooth start can be performed only by this operation. According to the second aspect of the invention, remote control such as engine start, stop, restart, and rotation speed adjustment can be performed.

[0011]

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. 1 and 2 show an embodiment of the wire saw driving device according to the present invention. The wire saw driving device shown in the figure includes a main sheave 10 around which an endless wire saw is wound, and an engine 12 that rotationally drives the main sheave 10.

The main sheave 10 is rotatably supported at one end of a carriage 16 having a plurality of wheels 14. The engine 12 is fixedly supported on the other end side of the bogie 16, and a torque converter 18 whose slip amount changes according to the load is attached to the rotation shaft of the engine 12.

The rotary shaft 10a of the main sheave 10
Between the pulley 18a of the torque converter 18 and
The power transmission mechanism 20 is interposed. The power transmission mechanism 20 of this embodiment includes a transmission 24, an intermediate pulley 26 and a plurality of belts 28. The input pulley 24a of the transmission 24 and the pulley 18 of the torque converter 18 are connected by the belt 28. The output pulley 24b of the transmission 24 and the intermediate pulley 26 are connected by a belt 28.

Although not shown in the figure, the power transmission mechanism 20 is connected by a belt so as to drive the wheels 14 of the carriage 16 to rotate. On the other hand, in front of the main sheave 10, a pair of tension pulleys 30 around which the wire saw is wound are provided on the same vertical surface. The tension pulley 30 is supported by a damper arm 32 whose one end is fixed to the carriage 16.

A receiver 34 is installed on the carriage 16 to control the engine 12 such as starting, stopping, restarting, and adjusting the rotation speed. The transmitter 36, which sends a signal to the receiver 32, is placed at a place away from the carriage 16 and
An N / OFF switch, a starter motor start switch of the engine 12, a rotation speed increase / decrease switch of the engine 12, an ON / OFF switch of the carriage 16, a traveling speed increase / decrease switch of the carriage 16 and the like are provided.

In the wire saw driving device constructed as described above, for example, an endless wire saw in which diamond beads are loosely fitted at a predetermined interval is wound between the object to be cut and the main sheave 10. When the transmitter 36 sends a signal to the receiver 34, the engine 12 is started.

At this time, according to the wire saw driving device having the above-described structure, the torque converter 18 in which the slip amount changes according to the load between the engine 12 and the main sheave 10 around which the endless wire saw is wound. Therefore, when power is supplied to the engine 12 to start the engine 12 in a state where the engine speed is set to a predetermined value, a smooth start can be performed only by this operation.

In the above embodiment, the case where the receiver 34 and the transmitter 36 for transmitting and receiving signals by radio are provided and the engine 12 is remotely controlled by radio is illustrated, but the implementation of the present invention is not limited to this. It is not done, and transceiver 3
Instead of using 4, 36, the operator may manually control only when the engine 12 is started or the rotation speed is changed.

[0019]

As described above in detail in the embodiments,
According to the wire saw driving device of the present invention, the following effects can be obtained.

Even if a load is applied to the main sheave when the engine is started, the torque converter changes the slip amount according to the load, so that the torque converter can be started easily and smoothly, and the clutch can be manually disengaged like a mechanical clutch. It is not necessary to start the engine, just start the engine starter motor to start the engine easily and smoothly, and it is possible to shorten the operation in a bad working environment where chips are scattered. Become.

When controlling the number of revolutions of the engine, since the torque converter rotates while slipping, the rotation of the main sheave can be gradually increased and decreased. Even if the wire saw catches on the reinforcing bars or corners of the object to be cut and the load fluctuates, the shock can be absorbed inside the torque converter and the torque fluctuation of the engine can be absorbed. The wire saw is prevented from being cut and the work safety is improved.

Since there is no friction portion unlike the mechanical clutch, maintenance such as replacement of the clutch plate can be reduced. Even if either the engine or the wire saw suddenly stops for some reason, the torque converter slips and responds to a sudden change in load.
It can protect the engine and prevent cutting of the wire saw.

According to the second aspect of the invention, the engine can be controlled by wireless remote control, so that the safety at the time of work such as starting and restarting is greatly improved.

[Brief description of drawings]

FIG. 1 is a top view showing an embodiment of a wire saw driving device according to the present invention.

FIG. 2 is a side view of the drive unit.

FIG. 3 is an explanatory diagram of a transmitter used for wireless control of the driving device.

[Explanation of symbols]

 10 Main Sheave 12 Engine 16 Bogie 18 Torque Converter 20 Power Transmission Mechanism 34 Receiver 36 Transmitter

Claims (2)

[Claims] 1. A wire saw drive device having a main sheave around which an endless wire saw is wound, and an engine for rotationally driving the main sheave, wherein a load is provided between the engine and the main sheave according to a load. The wire saw drive device is provided with a torque converter that changes the slip amount. 2. The engine is installed on a movable carriage, and is controlled by a wireless receiver installed on the carriage and a wireless transmitter installed at a location distant from the carriage. The wire saw driving device according to claim 1.