JPH0633708B2 - Guide shell angle adjustment device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a boring device that supports a guide shell of a rock drill so that it can be translated by a boom equipped with a tuning cylinder mechanism. The present invention relates to a guide shell angle adjusting device that allows the inclination of the guide shell to be changed.

[Conventional technology]

Generally, in excavating a tunnel or the like, a blast hole is formed at a predetermined angle on the outer peripheral portion and is drilled in parallel with the center line of the tunnel except the outer peripheral portion. Depending on the working conditions such as the drilling hole length and the presence or absence of support on the face, the angle of inclination is 3 ° to 1
It is set between 5 °. Recently, due to the widespread use of the NATM method, rock bolt holes are often drilled, and in this case, they are drilled at right angles to the center line of the tunnel.

Thus, conventionally, when performing parallel drilling, the guide shell is translated in parallel with a boom equipped with a tuning cylinder mechanism.
In the case of setting the tilt angle or in the case of the lock bolt drilling hole, the operator used the intuition to operate the tilt cylinder. However, setting the angle of inclination depending on intuition is difficult and requires skill, and the shape of the outer peripheral wall tends to be uneven due to setting error,
Rework and shoring increase in concrete usage. Therefore, by inserting a tilt angle control cylinder in series with the tilt master cylinder provided at the base end of the boom, and setting the stroke of this tilt angle control cylinder appropriately and operating it independently, the tilt cylinder can be moved through the tilt master cylinder. One that expands and contracts to set a predetermined tilt angle (see Japanese Patent Publication No. 57-20478), or an oil outflow conduit for a hydraulic circuit that operates a tilt angle adjustment cylinder by connecting a lift cylinder and a tilt angle adjustment cylinder in series. An insert angle adjuster with a piston is installed on the shaft, and a stopper that regulates the stroke of the piston is attached so that it can be adjusted (Shokai Sho 60-45795
No.) is proposed.

[Problems to be solved by the invention]

However, in the conventional tilt angle adjusting cylinder system as described above, only a tilt angle of 10 ° or less can be set, and it is necessary for the operator to operate the tilt cylinder when the lock bolt is drilled. Such operation of the tilt cylinder not only makes the setting of the tilt angle of the guide shell inaccurate, but also breaks the parallel tuning of the tuning cylinder mechanism.Therefore, the tuning cylinder mechanism must be readjusted when returning to the parallel drilling state. Had to do. In addition, since the stroke adjustment of the tilt angle adjustment cylinder used means such as replacement of the stroke control pin and tightening of the adjustment bolt,
It takes a lot of time and labor, and it is difficult to change the tilt angle quickly according to the drilling conditions.

The present invention solves such a problem in adjusting the angle of the guide shell of the punching device.

Thus, the present invention is a guide shell capable of setting the tilt angle of the guide shell and the direction of the lock bolt drilling independently of the tuning cylinder mechanism while maintaining the parallel tuning state by the tuning cylinder mechanism. It is an object of the present invention to provide an angle adjusting device.

[Means for solving problems]

According to the present invention, in order to solve the above-mentioned problems, in a drilling device for supporting a guide shell on which a rock drill is mounted so that the guide shell can move in parallel with a boom equipped with a tuning cylinder mechanism, the inclination of the guide shell is parallel to the drilling direction. To the lock bolt drilling direction, a guide-up cylinder that can be changed is installed between the guide shell and the boom independently of the tuning cylinder mechanism.
In the middle of the main pipeline for actuation of this guide-up cylinder, the lock bolt drilling direction setting pipeline and the tilt angle control pipeline in which the tilt angle control device is installed should be connected in parallel via a switching valve. This constitutes a guide shell angle adjusting device.

[Action]

In the case of making the insert hole or the lock bolt hole after the parallel drilling, the guide cylinder is operated to set the angle of the guide shell while the tuning cylinder mechanism is held in the parallel drilling state. At this time, if the tilt angle control device is adjusted to a predetermined tilt angle, and the main valve for actuation of the guide-up cylinder is switched to the tilt angle control conduit side by the switching valve to operate the guide-up cylinder, The working pressure liquid corresponding to the tilt angle is supplied, the guide shell is tilted, and the predetermined tilt angle is set. Further, when the switching valve is switched to the lock bolt drilling hole direction setting pipeline side, the working fluid which moves to the lock bolt drilling hole direction is supplied to the guide up cylinder, and the guide shell is set in the lock bolt drilling hole direction. . When the parallel drilling is restarted, the guide shell is returned to the initial state, and then the guide shell is translated by the tuning cylinder mechanism, and it is not necessary to readjust the parallel tuning.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory view of a hydraulic circuit of a guide shell angle adjusting device according to an embodiment of the present invention, FIG. 2 is an elevational view of a perforating device having a guide shell angle adjusting device, and FIG. FIG. 4 is an enlarged view of the vicinity of the mounting portion of the guide-up cylinder, and FIGS. 4 and 5 are operation explanatory views.

A boom 2 is pivotally attached to the boring device 1 so that the boom 2 can be raised and lowered. A suspended guide shell 8 is supported. The boom 2 is provided with a boom lift cylinder 9 and a tilt master cylinder 10 at the base end thereof, and a tilt cylinder 11 between the tip end thereof and the tilt body 3, and the cylinder groups 9, 10, Reference numeral 11 constitutes a known tuning cylinder mechanism, which allows the guide shell 8 to move in parallel when the boom 2 is raised or lowered. The boom swing cylinder 12, the swing master cylinder 13, and the guide swing cylinder 14 provided between the tilt body 3 and the swing body 4 at the base end portion of the boom 2 similarly constitute a tuning cylinder mechanism, and a guide shell for turning the boom 2 is provided. It is possible to move in parallel. The guide rotary 5 rotates the guide shell 8 360 ° around the axis of the swing body 4 by an oil motor installed in the swing body 4.

A guide mounting 6 is pivotally attached to a guide up shaft 15 fixed to the guide rotary 5.
Between the clevis 16 protruding obliquely downward and forward from the guide-up shaft 15 and the rear portion of the guide mounting 6,
A guide up cylinder 17 is provided. The guide-up cylinder 17 has a direction in which the guide shell 8 is parallel to the hole when it is extended, and the guide shell 8 is shortened as the guide shell 8 is shortened.
When the inclination of becomes large and shortens to the stroke end,
The guide shell 8 is attached so as to be in the direction of the lock bolt drilling hole.

On the rod side and the head side of the guide-up cylinder 17, from the guide-up control valve 18 to the operation main pipeline 19
And a return pipe 20 are connected to each other, and a double pilot operated check valve 21 is provided in both the pipes 19 and 20. Further, in the middle of the main operation pipe line 19, a lock bolt drilling direction setting pipe line 22 and a tilt angle control pipe line 23 are provided with a switching valve 24.
Are connected in parallel via. A tilt angle control device 25 is provided in the tilt angle control conduit 23.

The tilt angle control device 25 includes a cylinder pump 26 and a tilt angle adjusting handle 27. The tilt angle adjusting handle 27 rotatably supports a spiral cam, and the stroke of the cylinder pump 26 can be set by rotating the spiral cam by an arbitrary angle.

The guide-up control valve 18 has its P port and T port connected to a drive pump and a tank (not shown), respectively. When setting the tilt angle, turn the tilt angle adjustment handle 27 to determine the stroke of the cylinder pump 26,
When the switching valve 24 is switched to the angle control line 23 side and the guide-up control valve 18 is pushed to the right in the drawing, the working pressure liquid flows into the cylinder pump 26 and moves the piston by a preset stroke. By this movement, a predetermined amount of working pressure liquid flows into the rod side of the guide-up cylinder 17 and the guide-up cylinder 17 is shortened, and the guide shell is inclined and the tilt angle is set as shown in FIG.

When setting the direction of the lock bolt drilling hole, switch valve 2
By switching 4 to the side of the lock bolt drilling direction setting pipe line 22, the working pressure liquid flows into the rod side of the guide up cylinder 17, and the guide up cylinder 17 is shortened to the stroke end. Tilt and set in the direction of the rock bolt drilling hole.

When returning to the parallel drilling hole, press the guide-up control valve 18 to the left in the drawing to move the working pressure liquid to the guide-up cylinder 17
Of the pressure liquid on the rod side,
The guide-up cylinder 17 extends and returns to the direction of the first parallel punch. After that, the guide shell 8 can be moved in parallel by the tuning cylinder mechanism.

The lock bolt drilling direction is often perpendicular to the center line of the tunnel. Therefore, in this embodiment, when setting the lock bolt drilling direction, the guide-up cylinder 17 is used.
Is designed to be shortened to the stroke end, but when it is necessary to change the direction of the lock bolt drilling hole, an angle adjustment device is installed in the lock bolt drilling hole direction setting pipe to regulate the flow rate of the pressure liquid. By doing so, the direction of the lock bolt drilling can be set arbitrarily.

〔The invention's effect〕

Since the guide shell angle adjusting device of the present invention is configured as described above, the tilt angle setting of the guide shell and the lock bolt are performed independently of the tuning cylinder mechanism while maintaining the parallel tuning state by the tuning cylinder mechanism. The direction of drilling can be set, and the setting of the tilt angle can be changed easily and accurately.

[Brief description of drawings]

FIG. 1 is an explanatory view of a hydraulic circuit according to an embodiment of the present invention, FIG. 2 is an elevational view of a punching device, and FIG. 3 is an enlarged view near a mounting portion of a guide-up cylinder, and FIG. , FIG. 5 is a diagram for explaining the operation. In the figure, 1 is a boring device, 2 is a boom, 6 is a guide mounting, 7 is a rock drill, 8 is a guide shell, 9 is a boom lift cylinder, 10 is a tilt master cylinder, 11 is a tilt cylinder, and 12 is a boom swing. Cylinder, 13 is a swing master cylinder, 14 is a guide swing cylinder, 17 is a guide-up cylinder, 18 is a guide-up control valve, 19 is a main operation line, 22 is a lock bolt drilling direction setting circuit, and 23 is an angle control. Pipe, 24 switching valve, 25 tilt angle control device, 26 cylinder pump, 2
Reference numeral 7 is an angle adjustment handle.

Claims (2)

[Claims] 1. A drilling device for supporting a guide shell on which a rock drill is mounted so as to be able to move in parallel by a boom equipped with a tuning cylinder mechanism, wherein the inclination of the guide shell is from the parallel drilling direction to the lock bolt drilling direction. A changeable guide-up cylinder is provided between the guide shell and the boom independently of the synchronizing cylinder mechanism, and a lock bolt drilling direction setting pipe line and tilt angle control are provided in the middle of the main pipe line for operation of the guide-up cylinder. An angle adjusting device for a guide shell, characterized in that a tilt angle control pipe line provided with the device is connected in parallel via a switching valve. 2. The angle adjusting device for a guide shell according to claim 1, wherein the tilt angle control device comprises a cylinder pump and a tilt angle adjusting handle for setting a stroke of the cylinder pump.