JP2876099B2 - Fixing device for punch guide - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing device for a guide of a drilling machine for drilling a face of a tunnel at the time of tunnel excavation.

[0002]

2. Description of the Related Art Conventionally, a large number of holes having appropriate depths are formed in the length direction of a tunnel along the outer peripheral edge of a face of a planned tunnel, and a face ground surrounded by these holes is removed. As such a drilling device, a drilling machine guide is attached to the tip of a turning boom of a traveling vehicle body, and the drilling machine is disposed on the upper surface of the drilling machine guide so that it can slide back and forth and can be fixed freely. In addition, there is known a structure in which a fixing shaft is provided on a front end face of a drilling machine guide, and a fixing member is mounted on a spherical body formed at the front end so as to be rotatable vertically and horizontally. And, at the time of perforation, the perforator guide is fixed by pressing the fixing member against the face ground,
In this state, the drilling machine is advanced to form a hole reaching a desired depth at a predetermined portion of the face.

[0003]

However, according to such a conventional punching device, the fixing member is pivotally attached to the spherical body formed at the front end of the support shaft so as to be rotatable vertically and horizontally. Therefore, in a normal state, the fixing member maintains a configuration in which the fixing member is inclined downward by its own weight, and the fixing surface is inclined. After abutting on the ground, the lower end portion pivots forward with the abutting portion as a fulcrum, so that the entire surface comes into contact with the face ground.

Accordingly, not only is there a possibility that the pressing force acts intensively on the upper end side of the fixing member and there is a risk that the fixing member will be damaged, but also that the fixing rod is fixed so that the drilling rod of the drilling machine matches a predetermined drilling site on the face ground. Even when the member is to be brought into contact with the face ground, the fixing member comes into contact with the lower end portion rotating forward with the upper end portion as a fulcrum as described above, so that the axis of the support shaft of the fixing member is lowered. There is a problem in that the drilling machine is displaced, and the drilling machine cannot be directly opposed to the accurate drilling position.

Further, when the face ground is pierced by a piercing rod of a punch while the fixing member is pressed against the face ground,
Due to the resistance at the time of punching, the punch guide receives a reaction force in the retreating direction, and the reaction force reduces the pressing force of the fixing member, causing a deviation in the punching position and the punching direction, so that accurate drilling work cannot be performed. In addition, there is a problem that the rod being drilled is bent and cannot be drilled. An object of the present invention is to provide a fixing device for a punching machine guide which can solve such a problem.

[0006]

In order to achieve the above object, a fixing device for a drilling machine guide according to the present invention is provided in parallel with a drilling machine guide for guiding a drilling machine so as to be able to move forward and backward. A fixing device for fixing a drilling machine guide to the ground at the time of drilling, a shaft body protruding from a front end surface of a support member attached to the drilling machine guide, and a spherical body formed at a front end of the shaft body. The fixing member has a structure in which a fixing member is pivotally mounted so as to be rotatable vertically and horizontally, and a spring for pressing the fixing member forward is press-fitted between the fixing member and the support member.

A fixing device for a drilling machine guide according to a second aspect of the present invention is provided in parallel with a drilling machine guide for guiding a drilling machine so as to be able to move forward and backward so that the drilling machine guide is fixed to the ground at the time of drilling. The fixing device, wherein the supporting member attached to the drilling machine guide supports the shaft so as to be able to move back and forth in the axial direction, and a spherical body formed at the front end of the shaft protruding from the front surface of the supporting member. The fixing member has a structure in which a fixing member is pivotally mounted so as to be rotatable vertically and horizontally, and a spring for pressing the fixing member forward is press-fitted between the fixing member and the support member.

Further, the fixing device for a drilling machine guide according to the third aspect of the present invention is provided in parallel with a drilling machine guide for guiding the drilling machine so as to be able to move forward and backward so that the drilling machine guide is fixed to the ground at the time of drilling. The fixing device, wherein the supporting member attached to the drilling machine guide supports the shaft so as to be able to move back and forth in the axial direction, and a spherical body formed at the front end of the shaft protruding from the front surface of the supporting member. The fixing member is pivotally attached to the portion so as to be rotatable up and down, left and right, and a spring for constantly pressing the fixing member toward the front is provided on the rear side of the fixing member. The end is connected to the shaft.

[0009]

According to the first aspect of the present invention, the fixing member is held in a state where the fixing member always faces the front by the spring force, so that the fixing member can be accurately and smoothly placed on the predetermined portion of the face without shifting the punched portion by the punch. Even if the fixing is performed and the fixing member is tilted up and down and left and right in accordance with the unevenness and the inclined portion generated on the face, the fixing member is reliably fixed by being elastically pressed by the spring.

Further, as described in claim 2,
If the shaft of the fixing member is supported so as to be able to move back and forth in the axial direction with respect to the supporting member, when the fixing member is pressed against the face, the fixing member retracts while compressing the spring, and When the drilling machine is pressed against the face ground with a certain pressing force, the drilling machine is advanced along the drilling machine guide in this state, and the face is drilled by the drilling rod, the drilling machine guide is formed by resistance from the ground side at the time of drilling. Receives a reaction force in the direction to retreat, but the reaction force is elastically absorbed by the spring, and the fixing member is securely fixed to the face ground while maintaining the predetermined pressing force, and the fixing member is displaced in the drilling direction. Accurate perforation can be efficiently performed without causing the like.

Further, when the shaft of the fixing member can be advanced and retracted in the axial direction by the jack, the tip bit of the piercing rod is pressed against a predetermined piercing portion to perform positioning. After that, the jack can be extended to fix the fixing member to the face, so that the drilling operation can be performed with high precision.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. In FIG.
A guide 20 is mounted on the lower surface of the front part of the guide 20 in parallel with the guide 20, and a punch 30 is disposed on the upper surface of the guide 20 so as to be slidable back and forth and fixed. Further, the boring machine guide 20 is mounted via a support member 60 to a distal end of a boom 50 provided on the traveling vehicle body 40 so as to be able to move up, down, left and right. The support member
The hydraulic jack 60 is connected to and supported by the hydraulic jack 70 so as to be freely refracted in the vertical direction with respect to the boom 50.

As shown in FIGS. 2 and 3, the fixing device 1 slides back and forth on rectangular support frames 21 and 22 fixed at appropriate intervals in the front-rear direction on the lower surface of the front end portion of the punching machine guide 20. A rectangular cylindrical support member 2 freely inserted and supported, a shaft body 3 having a shaft portion fixedly attached to the center of a front end wall plate 2a of the support member 2 and projecting forward; A fixing member 4 rotatably and vertically rotatably fitted on a spherical portion 3a formed at the tip of the body 3, and a hydraulic jack 5 for moving the support member 2 forward and backward;
The hydraulic jack 5 has a front portion inserted into a rear portion of the cylindrical support member 2 and a rear end connected to and supported by a fixing member 23 fixed to the punch guide 20.
The fixing member 4 is provided with claw portions 4a projecting from four sides of the front surface thereof so as to press against the face.

Numeral 6 denotes a coil spring disposed around the shaft body 3, which is a rear surface of the fixing member 4 and a front end wall plate of the supporting member 2.
The fixing member 4 is always pressed toward the front by press-fitting between the front surfaces of the fixing member 2a. Further, as shown in FIGS. 4 and 5, a short shaft cylinder 7a projecting rearward is fixed to four corners of the inner surface of the front end wall plate 2a in the support member 2 of the fixing device 1, and the inner surface is fixed. A spring support shaft 8a protrudes from the center, and the front end of a guide rod 9 disposed along the four corners of the support member 2 is inserted and fixed to the four fixed short shaft cylinders 7a. These guide rods 9 include the fixed short shaft cylinder 7a.
A movable short shaft cylinder 7b protruding from the four corners of a rectangular support plate 7c is slidably inserted and opposed to the spring support shaft 8a at the front center of the support plate 7c. The spring support shaft 8b protrudes.

A fixed guide block 10 is fixed inside the center of the tubular support member 2. Four guides inserted from the movable short shaft cylinder 7 b to the support plate 7 c at four corners of the fixed guide block 10 are provided. The rear end of the rod 9 is inserted, and the rod end protruding from the rear end surface of the guide block 10 is fixed to the guide block 10 by a nut 11 or the like. Reference numeral 12 denotes a large-diameter coil spring, and 13 denotes a small-diameter coil spring inserted into the large-diameter coil spring 12. Both front and rear ends of these springs 12, 13 are connected to the opposed spring support shafts 8a, 8b. It is press-fitted between the inner surface of the front end wall plate 2a of the support member 2 and the support plate 7c of the movable short shaft cylinder 7b while being fitted and supported.

On the other hand, a guide hole 10a is formed through the center of the guide block 10, and a rod-shaped pressing member 14 connected to the tip of the piston rod 5a of the hydraulic jack 5 is slidably moved in the guide hole 10a. The pressing member 14 is movably inserted.
Is integrally fixed to the center of the support plate 7c.

The drilling machine 30, which is disposed on the upper surface of the drilling machine guide 20, has its movable base plate 31 mounted on the guide 20 so as to be slidable back and forth. The movable base plate 31 is connected to an endless chain or a rotary screw bar provided in the guide 20, and the endless chain or the screw bar is driven by a motor so as to be movable back and forth. Further, on the movable base plate 31, a rotary drive mechanism for the drilling rod 32 of the drilling machine 30 and a striking mechanism 33 are provided.

The operation of the fixing device for the drilling machine guide in the embodiment configured as described above will be described. The traveling body 40 is moved in the tunnel T and the drilling machine guide 20 in which the drilling machine 30 is disposed is connected to the tunnel. After facing the position close to the face ground and operating the boom 50, and adjusting the level of the guide support member 60 with respect to the boom 50, the drilling machine 30 is advanced to move the tip bit 34 of the drilling rod 32. It is brought into contact with a predetermined drilling position on the cutting ground at a predetermined insertion angle.

In this state, when pressure oil is supplied to the hydraulic jack 5 to extend the rod 5a, the pressing member 14 connected to the rod 5a moves forward, and the movable short shaft cylinder 7b is projected. The supporting plate 7c is pressed forward along the guide rod 9.
This pressing force is transmitted to the cylindrical support member 2 via the large and small diameter coil springs 12 and 13, and the support member 2 extends along the inner surfaces of the support frames 21 and 22 fixed to the lower surface of the drilling machine guide 20. Move forward. As the support member 2 advances, the four-sided claw portion 4a of the fixing member 4 projecting from the front end of the support member 2 abuts on a predetermined position on the face ground.

At this time, the fixing member 4 is attached to the spherical portion 3a of the shaft 3 projecting from the front surface of the support member 2 so as to be rotatable up and down and left and right, and the rear surface of the fixing member 4 and the support member 2 Since the coil spring 6 is press-fitted between the front end wall plates 2a, the fixing member 4 is accurately brought into contact with a predetermined portion of the face surface in a state where the fixing member 4 is directed forward, and the face surface is uneven. In the case where the coil spring 6 is deformed in an inclined manner, the coil spring 6 is tilted while being compressed in accordance with the deformed surface, and the four claw portions 4a are fixed to the face with a uniform contact force.

When the pressure oil is further supplied to the hydraulic jack 5 from this state to extend the rod 5a, the support member 2 having the fixing member 4 protruding cannot be further advanced.
The pressing member 14 connected to the rod end moves forward through the guide hole 10a of the guide block 10 fixed in the supporting member 2 to move the supporting plate 7c integral with the pressing member 14 along the guide rod 9. Large and small diameter coil spring
Compress 12 and 13. These coil springs 12, 13
The compressive force acts as a pressing force of the fixing member 4 against the face ground, and the fixing member 4 is firmly fixed to the face ground with a predetermined pressing force corresponding to the compressive force.

After the fixing member 4 is fixed to the face ground with a predetermined pressing force by the operation of the hydraulic jack 5,
The drilling machine 30 is advanced, and the tip bit 33 of the drilling rod 32 is moved.
While pressing against a predetermined portion of the face ground,
Is rotated and hit to form a hole 80 as shown in FIG. At the time of drilling, the drilling machine guide 20 receives a reaction force in the backward direction through the drilling machine 30 due to resistance from the ground side due to the propulsion excavation of the drilling rod 32, and the reaction force is applied to the hydraulic jack connected to the drilling machine guide 20. 5 is absorbed by the large and small diameter double coil springs 13 and 14 so that the fixing member 4 is always
The fixing can be performed on the face while maintaining a predetermined pressing force.

Next, FIG. 7 shows another embodiment of the fixing device of the present invention, in which a short supporting member 2A is integrally fixed to the lower surface of the tip of a punching machine guide 20, and the fixing supporting member 2A is fixed. A shaft member 3A of the fixing member 4 which is formed relatively long between the front and rear center portions is movably inserted in the axial direction and supported, and a supporting member is provided.
The fixing member 4 is pivotally attached to a spherical body 3a formed at the front end of the shaft 3A protruding from the front surface of the shaft 2A so as to be rotatable vertically and horizontally.
Further, the coil spring 6 is press-fitted and arranged on the surface of the fixing member 4 and the support member 2A facing each other, and the shaft 3A protruding from the rear end of the support member 2A is prevented from coming off by the stopper 15. Note that the shaft 3A may be supported in the support member 2A in a retaining state without penetrating the support member 2A.

According to the fixing device constructed as described above, the fixing member 4 is always oriented in the front direction by the coil spring 6 press-fitted between the fixing member 4 and the support member 2A, so that the fixing member 4 can be accurately positioned at a predetermined position on the face. Of course, the supporting member 2A
Although the shaft 3A of the fixing member 4 is freely movable in the axial direction despite the fact that the fixing member 4 is integrally fixed to the punch guide 20, when the fixing member 4 is pressed against the face, The coil spring 6 is compressed according to the pressing force, and the fixing member 4 is firmly fixed to the face ground by the restoring force due to the compression. Further, even when drilling by the drilling machine 30,
Although the resistive force is received from the ground side as described above, the fixing member 4 can be always fixed to the face while maintaining the predetermined pressing force while absorbing the resistive force by the coil spring 6. .

FIG. 8 shows another embodiment of the fixing device of the present invention. A relatively long cylindrical support member 2B is integrally fixed to the lower surface of the tip of a punch guide 20, and this support member is fixed to the fixing device. The shaft 3B of the fixing member 4 is movably inserted in the center of the front wall surface of the fixing member 4 in the axial direction and supported, and a spring receiver 16 is fixed to an appropriate position of the shaft 3B protruding from the front surface of the support member 2B. A coil spring 6 is press-fitted and arranged between the spring receiver 16 and the rear surface of the fixing member 4 which is pivotally attached to the front end spherical body portion 3a of the shaft body 3B so as to be vertically and horizontally rotatable. A hydraulic jack 17 is fixed to the shaft body 3 and a rod 18 thereof is connected to a rear end of the shaft body 3B.

According to the fixing device constructed as described above, the fixing member 4 is always oriented in the front direction by the coil spring 6 so that the fixing member 4 is accurately brought into contact with a predetermined portion of the face. After contacting the tip bit 33 of the
The fixing member 4 can be fixed to the face by extending the rod 18 of the fixing member 17, and the fixing member 4 can be pressed against the face with a constant pressure even during the perforation.

[0027]

As described above, according to the fixing device for a drilling machine guide of the present invention, the fixing member is pivotally attached to the spherical body formed at the front end of the shaft so as to be rotatable up, down, left and right. Since a spring for pressing the fixing member toward the front is press-fitted between the supporting member and the fixing member, the fixing member can always be directed to the front side by the spring, and therefore,
When the fixing member is fixed to the face, the fixing member can be accurately and smoothly pressed to the predetermined portion of the face without shifting the position of the hole punched by the punch, so that the punching operation can be performed accurately and efficiently.

Further, according to the second aspect of the present invention, since the shaft of the fixing member is supported so as to be able to move back and forth in the axial direction with respect to the support member, the drilling machine guide is advanced during drilling. When the fixing member is pressed against the face ground, the fixing member can be retracted and fixed in a buffered manner while compressing the spring resiliently pressing the fixing member, and in a stable state with a constant pressing force by the spring. The fixing member can be fixed and the resistance from the ground side at the time of drilling can be absorbed by the spring.Therefore, the fixing member is always firmly fixed to the face ground and the deviation in the drilling direction is maintained. This allows smooth perforation without causing the perforation.

According to the third aspect of the present invention,
If the shaft of the fixing member is made advanceable / retractable in the axial direction by a jack, the tip bit of the piercing rod is pressed against a predetermined piercing portion to perform positioning, and then the jack is extended to fix the fixing member to the face. This makes it possible to perform an accurate drilling operation on a predetermined drilling site.

[Brief description of the drawings]

FIG. 1 is a simplified side view of a traveling vehicle body provided with a drilling machine,

FIG. 2 is a side view of a fixing guide including a fixing device.

FIG. 3 is a bottom view thereof,

FIG. 4 is a vertical side view of a fixing device.

FIG. 5 is a longitudinal front view thereof,

FIG. 6 is a simplified side view showing a perforated state;

FIG. 7 is a longitudinal sectional side view showing another embodiment of the fixing device of the present invention;

FIG. 8 is a vertical sectional side view showing still another embodiment of the fixing device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fixing device 2 Support member 3 Shaft 3a Spherical part 4 Fixing member 5 Hydraulic jack 6 Spring 17 Hydraulic jack 20 Punching machine guide 30 Punching machine

Claims (3)

(57) [Claims] 1. A fixing device for juxtaposing a drilling machine guide for guiding a drilling machine so as to be able to move forward and backward, and fixing the drilling machine guide to the ground at the time of drilling, wherein a front end of a support member attached to the drilling machine guide is provided. A fixing member is pivotally attached to a spherical body formed at the front end of the shaft so as to be rotatable up, down, left, and right. A fixing device for a drilling machine guide, characterized by press-fitting a spring that presses toward the surface. 2. A fixing device for fixing a drilling machine guide to a ground at the time of drilling by juxtaposing a drilling machine guide for guiding a drilling machine so that the drilling machine can move forward and backward. The fixing member is pivotally attached to the spherical body formed at the front end of the shaft protruding from the front surface of the supporting member so as to be able to move back and forth freely in the axial direction,
A fixing device for a drilling machine guide, wherein a spring for pressing the fixing member forward is press-fitted between the fixing member and the support member. 3. A fixing device for fixing a drilling machine guide to a ground at the time of drilling by juxtaposing a drilling machine guide for guiding a drilling machine so as to be able to move forward and backward, wherein a shaft is attached to a support member attached to the drilling machine guide. The fixing member is pivotally attached to the spherical body formed at the front end of the shaft protruding from the front surface of the supporting member so as to be able to move back and forth freely in the axial direction,
Further, a spring for constantly pressing the fixing member toward the front is provided on the rear surface side of the fixing member, and a jack is mounted on the support member, and the rod end thereof is connected to the shaft. Fixing device for punch guide.