JPH10266760A - Device for controlling rising of bolter head of rock bolt-driving machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To control the rising of a bolter head to prevent a truck from being inverted. SOLUTION: This rock bolt driving machine is equipped with a tilting mast mounting on a truck, a rock bolt driving bolter head capable of being raised and lowered by a lift motor 24 mounted on the mast and a mast support expanded to a slope side with a mast support cylinder 20 and bearing the inclined mast from the slope. In that case, a position sensor for detecting that the height of the bolter head is within the limits of stability and a pressure switch 44 for detecting a bearing state of the mast with the mast support are provided, and an electromagnetic selector valve 36 switched so as to rise beyond the limits of the bolter head only in a bearing state of the mast with the mast support based on detection signals of the position sensor and pressure switch 44 is provided to a pilot pipe line 28 of a lift motor control valve 26.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rock bolt driving machine used for driving a rock bolt on a slope such as a side wall of a road or the like. The present invention relates to a device for regulating a mast and a bolt head of a rock bolt driving machine.

[0002]

2. Description of the Related Art When a slope such as a side wall of a road or the like is formed, in order to prevent the slope from collapsing, a lock bolt is cast and reinforced.

In order to place a lock bolt on a slope, a work scaffold must be provided along the slope to perform operations such as drilling, injecting cement milk, and inserting a lock bolt.
However, the construction of the work scaffold is troublesome, time-consuming and costly, and the worker works at a high place on the work scaffold.

[0004] Therefore, in order to increase the efficiency of lock bolt installation work and improve safety, in recent years, a tiltable mast has been provided on a self-propelled trolley, and a bolter head for rock bolt installation has been mounted on this mast. Rock bolt driving machines have been developed.

In this lock bolt setting machine, the mast is tilted so as to be parallel to the slope, and the voltaic head is moved up and down along the mast so that the lock bolt is set at a predetermined position on the slope. I have.

[0006] For this reason, a long mast is required in order to drive a rock bolt on a high slope. However, if the long mast is supported in an inclined state, the stability of the bogie is deteriorated. In the state of being on the upper part of the mast, there is a high possibility that the bogie will fall. Therefore, in order to secure the stability of the rock bolt driving machine using only the bogie, a large bogie is required.

Therefore, in order to reduce the size of the bogie, a mast support is provided on the mast so as to protrude to the side of the slope, and the inclined mast is supported from the slope.

[0008]

In such a lock bolt driving machine, when the mast is tilted with the volta head in the upper part of the mast, the bogie falls down. After the mast is tilted so that it is parallel to the slope with the volta head in the lower stability range, the mast support is extended to the slope and the mast is supported from the slope to secure stability. Must be raised to the casting position.

However, in the field work, the operator inclines the mast in a state where the voltaic head is erroneously raised to a position outside the stable range, or extends the mast support after tilting the mast before the mast is supported from the slope. There is a possibility that the voltaic head may be raised in the state.

SUMMARY OF THE INVENTION The present invention solves such a problem in a lock bolt driving machine, and restricts the volta head from rising above a stable range when the mast is not supported by the mast support. It is an object of the present invention to provide an apparatus for restricting the elevation of a voltaic head of a rock bolt driving machine which prevents the bogie from tipping over by allowing the voltaic head to rise out of a stable range only when the mast is supported.

[0011]

SUMMARY OF THE INVENTION According to the present invention, there is provided an apparatus for restricting the elevation of a voltaic head of a rock bolt driving machine, comprising a movable truck, a tiltable mast provided on the truck, and a lifting motor mounted on the mast. A rock bolt driving machine having a rocker head for rock bolt driving that can be raised and lowered and a mast support fixed to the mast and extended to the side of the slope by a mast support cylinder to support the inclined mast from the side of the slope. , A position sensor for detecting that the height of the volta head is within the stable range is provided on the mast,
A pressure switch for detecting the mast support state of the mast support is provided in the extension pipe of the mast support cylinder, and the pilot pipe of the lifting / lowering motor control valve is provided with a mast support based on the detection signals of the position sensor and pressure switch. The above-mentioned problem is solved by providing an electromagnetic switching valve which is switched so that the volta head can be raised out of the stable range only when the mast is supported.

When driving a rock bolt on a slope,
With the bogie running near the slope, the mast is tilted so that it is parallel to the slope with the voltaic head in the lower stable range, and the mast support is extended toward the slope to remove the inclined mast from the slope. To support. Then, the voltaic head is raised along the mast, and a lock bolt is driven into a predetermined position on the slope.

In the above operation, when the mast is not supported by the mast support, the position sensor detects whether or not the voltaic head is within the stable range.
The switching of the electromagnetic switching valve is controlled by the detection signal, and the voltaic head is regulated so as not to rise above the stable range. When the mast support is extended to support the mast, the pressure switch sends a detection signal to switch the electromagnetic switching valve, so that the volta head can be raised outside the stable range.

As described above, the volta head can be raised out of the stable range only when the mast is supported by the mast support, so that the work can be performed safely without the risk of the lock bolt driving machine falling over.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a front view of a lock bolt driving machine provided with a volta head lifting control device according to an embodiment of the present invention, FIG. 2 is a side view of the lock bolt driving machine, and FIG. FIG. 4 is a front view of a lock bolt driving machine showing a state in which a volta head is in a lower stable range. FIG. 4 is a front view of a lock bolt driving machine showing a state where an inclined mast is supported from a slope by a mast support. FIG. 5 is a hydraulic circuit diagram of the lifting control device for the voltaic head.

The rock bolt driving machine 1 includes a bogie 2, a mast 3 provided on the bogie 2, a bolt bolting head 4 mounted on the mast, and a mast support 5 provided on the mast 3. And

The bogie 2 has a horizontally rotatable revolving body 7 provided on a traveling crawler 6, and a mount body 8 is fixed to a front portion of the revolving body 7. A tilt body 9 is supported on the mount body 8 by a tilt shaft 10. A tilt cylinder 11 is provided between the mount body 8 and the tilt body 9, and the tilt body 9 is tilted forward and backward by the expansion and contraction of the tilt cylinder 11.

The lower end of the mast 3 has a tilt body 9.
A pair of left and right mast swing cylinders 13 (13L, 13R) are provided between the tilt body 9 and the mast 3 at the front end of the mast swing cylinder 13. FIG.
As shown in FIG.
When L extends and the right mast swing cylinder 13R shortens, the mast 3 tilts toward the right slope 14 (clockwise in the figure), the right mast swing cylinder 13R extends, and the left mast swing cylinder 13L becomes When reduced, the mast 3 returns to an upright state.

The mast 3 is provided with two mast supports 5 facing rightward. The mast support 5 is protruded toward the slope 14 by the extension of the built-in mast support cylinder 20, and the inclined mast 3 is
4 can be supported. A lower support 22 for supporting the mast 3 from the ground 21 is provided on the lower right side of the lower end of the mast 3. Further, the mast 3 is provided with a position sensor 50 for detecting whether or not the height of the voltaic head 4 is within a stable range.

The volta head 4 is a rock bolt driving device that includes a rock drill 18 for drilling a bolt hole in the slope 14 and a bolt insertion mechanism 19 for inserting a lock bolt into the bolt hole. Rock drill 18 and bolt insertion mechanism 19
A guide shell 17 that guides the movement of the head in the direction of the slope 14 is supported by the carriage 16. The carriage 16 is provided with a hydraulically driven lifting / lowering motor 23 equipped with a sprocket. When the lifting / lowering motor 23 rotates, the sprocket meshes with the chain 15 stretched on the mast 3 and
Up and down along

As shown in FIG. 5, the ascending conduit 24 and the descending conduit 25 of the elevating motor 23 are connected to a service port of an elevating motor control valve 26. Lifting motor control valve 2
Reference numeral 6 denotes a center bypass type hydraulic pilot switching valve having three positions.
7 is connected to pilot lines 28 and 29. The pilot valve 27 operates the lever 30 to move up or down, thereby sending the pressure oil discharged from the pilot hydraulic pump 31 to the ascending pilot line 28 or the descending pilot line 29, and The control valve 26 is switched. When the lift motor control valve 26 is switched by the operation of the pilot valve 27, the ascending pipeline 24 and the descending pipeline 25 communicate with the discharge pipeline 33 of the driving hydraulic pump 32 and the return pipeline 35 to the tank 34. .

Further, the ascending pilot line 28 is electromagnetically connected to the ascending pilot port of the elevating motor control valve 26 with the return line 37 to the tank 34 by shutting off the pilot line 28 at the normal position. A switching valve 36 is provided. When the solenoid is switched by excitation of the solenoid, the electromagnetic switching valve 36 connects the pilot valve 27 with the pilot port on the upside of the lifting / lowering motor control valve 26.

An extension pipe 40 is connected to the head side oil chamber of the mast support cylinder 20, and a reduction pipe 41 is connected to the rod side oil chamber of the mast support cylinder 20. The extension pipe 40 and the reduction pipe 41 are connected to a cylinder port of a mast support control valve 42. The mast support control valve 42 is a center bypass type hydraulic pilot switching valve at three positions.
Is switched by the operation of a pilot valve (not shown), so that the expansion pipeline 40 and the reduction pipeline 41 communicate with the discharge pipeline 33 of the driving hydraulic pump 32 and the return pipeline 43 to the tank 34.

The extension line 40 has a pressure switch 4
4 are provided. The pressure switch 44 is turned ON when the mast support 5 is extended and the mast 3 is supported and the pressure in the head side oil chamber of the mast support cylinder 20 increases.

When the height of the voltaic head 4 is within the stable range, the solenoid is excited by the detection signal of the position sensor 50, and the pressure switch is provided when the mast support 5 is extended and the mast 3 is supported. The solenoid is excited and switched by the detection signal of 44.

When a lock bolt is to be driven on the slope 14, the carriage 2 is moved to the vicinity of the slope 14, the tilt cylinder 11 is extended, and the mast 3 is erected. Next, as shown in FIG. 3, in a state where the voltaic head 4 is within a stable range below a predetermined height H, the left mast swing cylinder 13
L is extended, the mast swing cylinder 13R on the right side is contracted, and the mast 3 is tilted toward the right slope 14 to make the mast 3 parallel to the slope 14 as shown in FIG.

Then, the mast support cylinder 20 is extended, the mast support 5 is extended toward the slope 14 to support the inclined mast 3 from the slope 14, and the lower support 22 is extended so that the mast 3 is moved to the ground 21. Support from.

After that, the voltaic head 4 is raised along the mast 3, a bolt hole is drilled at a predetermined position on the slope 14 by a rock drill 18, cement milk is injected, and then the bolt insertion mechanism 19 is bolted. To the position and insert the lock bolt. When the installation of one lock bolt is completed, the bolter head 4 is moved along the mast 3 to the next installation position, and the installation of the lock bolt is performed again at this position.

When a predetermined number of lock bolts have been driven along the mast 3, the mast support cylinder 20 is contracted by lowering the voltaic head 4 to a lower stable range, and then the mast support 5 is contracted. The left mast swing cylinder 13L is reduced, and the right mast swing cylinder 13R is extended to return the mast 3 to an upright state.
The carriage 2 is moved to the next work position.

In the above operation, when the mast 3 is not supported by the mast support 5, the electromagnetic switching valve 36 is not switched by the pressure switch 44. In this case, if the voltaic head 4 is within the stable range,
Since the electromagnetic switching valve 36 is switched by the detection signal of the position sensor 50, the operation of the pilot valve 27 allows the voltaic head 4 to move up and down. However, when trying to raise the voltaic head 4 out of the stable range, the electromagnetic switching valve 36 returns to the normal position according to the detection signal of the position sensor 50, so that the lifting / lowering motor control valve 26 also returns to the neutral position and the voltaic head 4 does not rise. Will be possible.

When the mast support 5 is extended to support the mast 3, the solenoid-operated directional control valve 36 switches the pressure switch 44
The solenoid is excited and switched by the detection signal, so that the voltaic head 4 can rise out of the stable range.

As described above, the voltaic head 4 can be lifted out of the stable range only when the mast 3 is supported by the mast support 5, so that the lock bolt driving machine 1 does not fall over and can safely work. be able to.

[0033]

As described above, according to the apparatus for restricting the rise of the volta head of the rock bolt driving machine according to the present invention, the volta head does not rise above the stable range when the mast is not supported by the mast support. It is possible to raise the bolt out of the stable range only when the mast is supported by the mast support, so that the lock bolt driving machine can be prevented from tipping over and work can be performed safely.

[Brief description of the drawings]

FIG. 1 is a front view of a lock bolt driving machine provided with a volta head elevation control device according to an embodiment of the present invention.

FIG. 2 is a side view of the lock bolt driving machine.

FIG. 3 is a front view of the lock bolt driving machine showing a state in which a voltaic head is in a lower stable range.

FIG. 4 is a front view of the lock bolt driving machine showing a state in which the inclined mast is supported from a slope by a mast support.

FIG. 5 is a hydraulic circuit diagram of the lifting control device of the voltaic head.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rock bolt setting machine 2 Cart 3 Mast 4 Volta head 5 Mast support 6 Crawler 7 Revolving unit 12 Swing axis 13 Mast swing cylinder 14 Slope 15 Chain 16 Carriage 17 Guide shell 18 Rock drill 19 Bolt insertion mechanism 20 Mast support cylinder 23 Elevating motor 24 Ascending pipeline 25 Descending pipeline 26 Elevating motor control valve 27 Pilot valve 28 Pilot pipeline 29 Pilot pipeline 31 Pilot hydraulic pump 32 Driving hydraulic pump 36 Electromagnetic switching valve 40 Extension pipeline 41 Reduction pipeline 42 Mast Support control valve 44 Pressure switch 50 Position sensor

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroki Kawasaki 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation (72) Inventor Shinichi Nishimura 1-2-3 Shibaura, Minato-ku, Tokyo Shimizu Construction Co., Ltd. (72) Inventor Takayuki Otomo 1-2-7 Koraku, Bunkyo-ku, Tokyo Sanshin-ken Construction Industrial Co., Ltd. (72) Inventor Hiroshi Kagiya 1-2-7 Koraku, Bunkyo-ku, Tokyo Sanshin-ken (72) Kazumi Osawa, Inventor Kazumi Osawa 1-2-7 Koraku, Bunkyo-ku, Tokyo Sanshin Ken Construction Industry Co., Ltd. (72) Kazuya Kobayashi 1058 Yoshii, Yoshii-cho, Tano-gun, Gunma Furukawa Inside the Yoshii Factory of Metals Co., Ltd. 1058 Yoshii, Yoshii-cho, Tano-gun, Ma, Japan Furukawa Machinery & Metal Co., Ltd.

Claims (1)

[Claims] 1. A movable cart, a tiltable mast provided on the cart, a rocker head for mounting a lock bolt mounted on the mast and movable up and down by an elevating motor,
The height of the bolt head is within a stable range in a rock bolt driving machine equipped with a mast support fixed to the mast and extended to the slope by the mast support cylinder to support the inclined mast from the slope. The mast support is provided with a position sensor for detecting the mast support state, and a pressure switch for detecting the mast support state of the mast support is provided in the extension line of the mast support cylinder. An electromagnetic switching valve that is switched based on the detection signal of the mast support to allow the mast support to move out of the stable range only when the mast is supported is provided. Ascent control device.