JP3135807B2 - Launching equipment for shaft excavators - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the starting of an excavator for digging a diagonal shaft diagonally upward from a horizontal shaft already constructed.
The present invention relates to a device for use .

[0002]

2. Description of the Related Art Conventionally, in order to excavate an inclined shaft such as a hydraulic pipeline of a hydroelectric power plant in a mountainous ground, for example, as shown in FIGS. (Referred to as an existing horizontal shaft), the truck 21 carrying the shaft excavator C is transported by traveling on the rail R laid on the bottom surface of the horizontal shaft A, and the shaft excavator C is moved obliquely upward. The tilting excavator C is started. At this time, it is necessary to tilt the inclined shaft excavator C in the inclined shaft excavation direction.

For this reason, in the conventional method, a starting inclined shaft portion D having a certain depth is excavated diagonally upward from a horizontal shaft A toward a shaft shaft B to be excavated, and a pulley block 22 is provided on the inner bottom surface of the starting inclined shaft portion D. And pulleys 23, and pulleys 24 and 25 are attached to the front end face of the inclined shaft excavator C and the bottom of the horizontal shaft A,
In addition, a winch 26 is installed on the rear side,
The pulleys 23 and 25 are connected to the pulley 24 of the excavator C which has been transported up to and to the pulley block 12 on the side of the starting inclined shaft D by pulleys 27 and 25.
Shaft excavator C
Is lifted obliquely upward, and the front end thereof is inserted into the starting inclined shaft part D, and thereafter the inclined shaft excavator C is started.

[0004]

However, according to the method and means for starting the inclined shaft excavator C as described above, the work of attaching the pulley block 22 and the pulley 23 to the starting inclined shaft portion D, the inclined shaft excavator C and the horizontal shaft Not only does the work of attaching the pulleys 24 and 25 to A take considerable labor and labor, but also the inclination of the excavator C becomes destabilized during the pulling operation with a rope, and the posture becomes unstable. Problems such as a decrease in Further, after the preparation for starting the inclined shaft excavator C toward the starting inclined shaft section D is completed, it is necessary to remove the pulleys 23 to 25 and the like, and there is a problem that the operation is inevitably complicated.

The present invention has been made in view of such a problem, and it is an object of the present invention to automatically start an inclined shaft excavator from an existing horizontal shaft with an efficient and stable posture at an accurate angle at a predetermined angle. It is an object of the present invention to provide a starting device for an inclined shaft excavator.

[0006]

To achieve the above object, according to the solution to ## for startup device inclined shaft drilling machine of the present invention, as described in claim 1, and horizontal underframe which is fixed to the bottom surface of the horizontal mine,
A tilting gantry which is superimposed on the horizontal underframe, and a rear end of which is pivotally attached to the rear end of the horizontal underframe so as to be able to swing up and down, and on which the inclined shaft excavator is mounted and installed; and A telescopic means such as a jack forcibly raising and lowering the horizontal underframe, a propulsion reaction receiving pedestal for supporting the rear end face of the inclined shaft excavator on the tilting gantry at the time of starting, a propulsion reaction receiving pedestal and an inclined shaft excavator And a propulsion means such as a jack interposed between the rear end portion and the rear end portion. In this device, as described in claim 2 , it is possible to provide an overturn prevention frame that is interposed between the bottom surface of the horizontal shaft and the tilting stand that stands up to a predetermined angle and supports the bottom surface of the tilting stand. desirable.

[0007]

[Function] An inclined shaft excavator is fixedly installed on a tilting gantry such that the rear end side is the side of a pivotal connection between the horizontal underframe and the tilting gantry. After fixing the horizontal underframe at the inclined shaft digging position in the horizontal mine, When the telescopic means such as a jack is extended, the tilting gantry starts to rise upward with respect to the horizontal frame around the pivotal connection with the horizontal frame. Then, the tilting stand is raised up to a predetermined angle oriented in the direction of excavation of the shaft. In this way, the rear end surface of the inclined shaft excavator on the tilting gantry standing up to the predetermined angle is received by the propulsion reaction force receiving base via a propulsion means such as a jack.

[0008] If a tilt-prevention mount is interposed between the bottom surface of the tilt mount standing upright and the horizontal shaft, an accidental fall of the tilt mount on which the inclined excavator is mounted can be prevented, and the tilt mount can be set at a predetermined angle. It can be supported more stably in the state where it is oriented. When the propulsion means is extended in this state, the shaft excavator starts at the above-mentioned set angle while sliding on the tilting base with the tilting base as a guide, and can start excavation of the shaft.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
In FIG. 1, A is an existing horizontal shaft, and B is an oblique shaft to be excavated by an oblique shaft excavator C. The inclined shaft excavator C is erected from the horizontal shaft A toward the inclined shaft B to be excavated by the starting device. First, a specific structure of the starting device will be described with reference to FIGS. explain.

Reference numeral 1 denotes a horizontal rectangular frame having, on both front and rear sides thereof, wheels 1a running on rails R laid in a horizontal shaft B rotatably supported, and the horizontal frame 1 is provided.
A tilting gantry 2, which is also a flat rectangular frame, is disposed on top of it. The tilting gantry 2 has a width substantially equal to the outer diameter (lateral width) of the shaft excavator C and a length slightly longer than the length of the shaft excavator C. The camber 2a whose upper surface is formed on the concave arc surface 2b along the lower peripheral surface of the shaft excavator C is integrally fixed at appropriate intervals, and the shaft shaft excavator C is longitudinally mounted on these cambers 2a. It is configured to be slidably mounted.

Further, the lower ends of posture holding frames 3, 3 each having a laterally long rectangular shape and having an appropriate height are fixed to both side ends of the front half of the tilting base 2, and project upward from both side ends of the tilting base 2. Opposing inner surfaces of these attitude holding frames 3 are formed as concave arc surfaces 3a, 3a which are received from the peripheral surfaces on both sides to the lower peripheral surface of the first half of the shaft excavator C. The rear end of the tilting base 2 is pivotally connected to the rear end of the horizontal frame 1 so as to be rotatable in the up-and-down direction. That is, a bracket 2c protruding from the lower surface of the rear end of the tilting gantry 2 and a bracket 1b protruding from the rear end of the horizontal underframe 1 are rotatably connected by a pivot 4.

The horizontal underframe 1 is formed wider than the tilting gantry 2 and, when viewed from a plane, as shown in FIG.
3 is projected by a width substantially equal to the thickness of the posture holding frame 3 and the posture holding frames 3 and 3 integrated with the tilting base 2.
Are connected via a link mechanism 5, and the link mechanism 5 and both side ends of the horizontal underframe 2 are connected by jacks 6. That is, the link mechanisms 5 are pivotally connected to each other so that they can be freely bent.
5c, a pair of links 5a and 5b, and one end of one link 5a is pivotally connected to the rear end face of the posture holding frame 3 so as to be rotatable 5d, and the other link 5b is a front side end of the horizontal underframe 1. Is pivotally mounted 5e on the upper surface. Further, the outer bottom portion of the jack 6 is pivotally connected to the pivot portion 5e, and the piston rod 6a of the jack 6 is pivotally connected to the central portion of the one link 5a.

It is to be noted that, instead of the jack 6, an expansion / contraction means, such as a screw mechanism, for raising and lowering the tilting base 2 by screw feed by rotation may be employed. Further, the extension mechanism such as the jack 6 may be directly connected between the horizontal underframe 1 and the tilting gantry 2 without employing the link mechanism 5. Further, a locking member (not shown) for preventing the inclined shaft excavator C from slipping down when the tilting gantry 2 stands up may be provided at an appropriate position of the tilting gantry 2 or the posture holding frame 3.

Reference numeral 7 denotes a propulsion reaction force receiving base for supporting the rear end face of the inclined shaft excavator C on the tilting base 2 when the tilting base 2 is raised, tilted, and started. Stop frame
The inclined receiving frame 7b is formed of a surface substantially orthogonal to the center line of the shaft B to be excavated. Reference numeral 8 denotes a plurality of propulsion jacks fixed to the inner peripheral surface of the rear end of the shaft excavator C, which receives the spreader 8a attached to the rod end thereof on the inclined receiving frame portion 7b of the propulsion reaction force receiving base 7. It is configured to be. Note that the propulsion jack 8 is not attached to the shaft excavator C,
May be interposed between the rear end face and the inclined receiving frame 7b of the propulsion reaction force receiving stand 7. Further, instead of the propulsion jack 8, propulsion means such as a screw mechanism may be employed.

Reference numeral 9 denotes an overturn prevention base which is interposed between the bottom of the tilting base 2 and the bottom of the horizontal shaft A when the tilting base 2 is raised to a predetermined angle, as shown in FIGS. The width of both side frames is made larger than the width of the horizontal underframe 1 so that the lower end is placed on the bottom surface of the horizontal well A so as to straddle the horizontal underframe 1, and the rear face of the horizontal well B is It is formed on an inclined frame 9a inclined at substantially the same angle as the excavation angle, and the inclined frame 9a is configured to receive the bottom surface (lower surface) of the tilting gantry 2 standing up to a predetermined angle.

Further, the inclined frame portion 9a of the fall prevention gantry 9
While a plurality of bolt holes 9b are drilled on both sides of
A plurality of bolt holes 2d facing these bolt holes 9b are also formed at both end portions of the tilting base 2, and the bolt holes 2d are formed.
It is configured such that d and 9b are connected by bolts and nuts 10. 11 is a shaft excavation position and the horizontal underframe 1 of the starting device.
The lower end of the fixing hardware 13 pivotally connected to the front end of the horizontal underframe 1 by the pin 12
14 connects to the anchor 11.

Next, a description will be given of a method of starting the inclined shaft excavator C obliquely toward the inclined shaft B to be excavated by using the inclined shaft excavator starting apparatus configured as described above. First,
The horizontal underframe 1 provided with the tilting gantry 2 is caused to travel on a rail R laid on the bottom surface of the existing horizontal shaft A, and is stopped at the inclined shaft excavation position. At this time, the inclined shaft excavator C may be placed on the tilting gantry 2 previously folded horizontally on the horizontal underframe 1 and transported to the inclined shaft digging position. The shaft excavator C may be mounted on the top. Alternatively, the shaft excavator C may be fixed to the tilting gantry 2 with a wire or the like, and the fixing may be released when the vehicle starts moving.

The excavation position of the inclined shaft in the existing horizontal shaft A is:
A horizontal well A ′ having a length that allows the horizontal underframe 1 to be temporarily installed is provided from the intersection of the horizontal well A and the inclined shaft B to be excavated in the forward extension direction of the horizontal well A, and a horizontal well A is provided. An inclined shaft starting port D having a depth and a diameter into which the front end of the inclined shaft excavator C can be inserted is digged and formed diagonally forward on the upper wall surface in the inclined shaft excavation direction. Further, a crossing wall portion between the horizontal shaft portion A ′ and the inclined shaft start port D is cut obliquely to form a space d where the tilting gantry 2 can stand. In addition, when excavating the inclined shaft D from the middle part of the horizontal shaft A, the front extension of the horizontal shaft A can be used for the horizontal shaft A ′, and when the extension of the horizontal shaft A does not exist, the horizontal underframe 1 is used. Horizontal pit approximately equal in length to
Excavate A '. Also, on the bottom of the horizontal shaft A on the extension line below the inclined shaft starting port D, a pit for installing the
15 have been drilled.

The horizontal frame 1 of the starting device which has traveled to the shaft excavation position is fixed at that position by connecting the front end of the horizontal frame 1 to the fixed anchor 11 with the pin 14 through the fixing hardware 13. A liner 16 is interposed between the lower surface of the rear end portion 1 and the bottom surface of the horizontal shaft A to prevent the horizontal frame 1 from tilting in the horizontal direction. Before fixing the horizontal frame 1 at the inclined shaft excavation position, the horizontal frame 1 is inserted into the horizontal well A ′, and in this state, the propulsion reaction force receiver 7 is moved to the pit 15.
The horizontal frame 1 is retracted to the excavation position of the shaft and fixed.

After the horizontal frame 1 is fixed in this way, when the rod of the jack 6 connecting the horizontal frame 1 and the tilting gantry 2 folded thereon is extended, the link mechanism 5 is used. The tilting gantry 2 pivots upward about the rear end pivot portion 4 and stands up. The inclined shaft excavator C mounted on the camber 2a of the tilting gantry 2 slides rearward by this standing up, but the locking member (not shown) provided on the tilting gantry 2 causes the tilting excavator C to move backward. Sliding (the front side can be freely slid away from the locking member) can be prevented, or the spreader 8a of the propulsion jack 8 abuts the inclined receiving frame 7a of the propulsion reaction force receiving base 7. Block by letting them do.

When the tilting gantry 2 stands up to a certain angle and the inclined shaft excavator C is directed in the direction of the inclined shaft B to be excavated, the operation of the jack 6 is stopped, and the bottom surface of the inclined tilting gantry 2 and the horizontal shaft A A tilt prevention frame 9 is interposed between the tilt frame 9a and the bottom surface of the tilt frame 2. The tilt frame 9a receives the bottom surface of the tilt frame 2 and the tilt frame 9a and the tilt frame 2 are integrally fixed by bolts and nuts 10. At the same time, the lower end of the fall prevention frame 9 is fixed by driving an anchor 18 into the bottom surface of the horizontal shaft A. In this state, the tilting gantry 2 reliably maintains the above-described tilt angle and prevents the tilting gantry 2 from falling in the front-rear, left-right direction.

Then, when the propulsion jack 8 is extended by receiving the reaction force from the propulsion reaction force receiving stand 7, the inclined shaft excavator C slides on the concave arc surface of the camber 2 a of the tilting base 2, The vehicle starts to start port D. At this time, the tilting excavator C has a posture holding frame 3 protruding from both end portions of the first half of the tilting gantry 2.
Departure entrance D while restricted by left and right delusions
Propelling exactly towards.

When the propulsion jack 8 performs propulsion for one stroke, the propulsion jack 8 is sequentially contracted, and a spacer member is interposed between the spreader 8a and the inclined receiving frame portion 7b of the propulsion reaction force receiving base 7. Then, the propulsion jack 8 is extended again to advance the inclined shaft excavator C, and further, the face ground of the inclined shaft starting port D is excavated by the front end excavation part C1 of the inclined shaft excavator C. In this case, when the cutter of the inclined shaft excavator C is rotated and excavated, the inclined shaft excavator C rolls due to the rotation reaction force. Keep it fixed. In this way, when the entire length of the shaft excavator C is immersed in the shaft B from the start port 9 while excavating the shaft B, the horizontal underframe 1 having the starting device, that is, the tilting base 2, The propulsion reaction receiving stand 7, the fall prevention stand 9, etc. are removed.

As is well known, the shaft excavator C has a front body C2, a middle body C3 and a rear body C4 having a digging part C1 such as a cutter at the front end, and the front and rear bodies C2 and C4 are connected via the middle body C3. A front gripper C5 and a rear gripper C6 are connected to each other so as to be able to expand and contract and are removably press-fitted to the wall surface of the shaft B excavated on the front and rear shells C2 and C4. Then, with the rear gripper C6 pressed against the excavation wall surface and supporting the entire excavator, the forebody C2 is excavated while extending the front body C2 forward, and after excavating the inclined shaft B with a certain length, the front gripper C5 is excavated. While the rear gripper C6 is released from the excavated ground, and the rear trunk C4 is pulled toward the front trunk C2 side, and the shaft B is excavated while repeating the operation. If the length of the inclined shaft starting port D is set to be longer than the length of the inclined shaft excavator C, when the inclined shaft excavator C is on the starting device, rolling does not occur. No need to fix, front gripper from excavation start
Rolling can be prevented by pressing C5 and the rear gripper C6 against the wall surface of the shaft entrance D.

[0025]

As described above, the launching of the inclined shaft excavator of the present invention is started as described above.
According to the device for the horizontal underframe fixed to the bottom of the horizontal shaft,
Lay it on this horizontal underframe and attach the rear end of the horizontal underframe.
It is pivotally attached to the rear end so as to be able to swing up and down, and
Tilting stand to be mounted and installed, and this tilting stand
Such as a jack that forcibly raises and lowers the table with respect to the horizontal frame
Telescopic means and the rear end of the shaft excavator on the tilting platform when starting
Propulsion reaction pedestal that supports the
Propulsion means such as jacks interposed between the rear end of the milling machine
By arranging the gantry at the inclined shaft excavation position, preparation for starting the inclined shaft excavator can be easily completed, and furthermore, the inclined shaft excavator is installed on the gantry, and this gantry is mounted. Since the shaft excavator is raised up to a predetermined angle, the shaft excavator can be safely and accurately directed toward the shaft to be excavated.

Further, by extending the expansion / contraction means such as a jack while the horizontal underframe is fixed to the horizontal shaft,
The tilting gantry can be easily and accurately raised to a desired angle with respect to the horizontal underframe. In addition, the tilting excavator on the tilting gantry can be received by a propulsion reaction force receiving base via a jack or other propulsion means. In the stopped state, the propulsion means can be started in the direction of excavation of the shaft with a large propulsive force by using the tilting base as a guide by the operation of the propulsion means.

Further, by interposing a tipping prevention stand between the bottom surface of the tilting stand standing upright and the horizontal shaft, an accidental tipping of the tilting stand on which the inclined shaft excavator is mounted can be reliably prevented. In addition, the shaft excavator can be started while being more stably supported while being oriented at a predetermined angle. Furthermore, after the start of the inclined shaft excavator is completed, it is easy to remove the horizontal underframe equipped with the tilting gantry, the propulsion reaction receiving stand, and the like, so that the workability is remarkably improved.

[Brief description of the drawings]

FIG. 1 is a simplified longitudinal side view of a horizontal pit in which a starting device is arranged at an oblique digging position,

FIG. 2 is a side view of the starting device in a state where the shaft excavator is directed to the shaft excavation side,

FIG. 3 is a side view of the starting device in a state where the tilting base is folded,

FIG. 4 is a simplified plan view thereof,

FIG. 5 is a simplified front view thereof,

FIG. 6 is a simplified side view of a fall prevention base;

FIG. 7 is a simplified front view thereof,

FIG. 8 is a simplified longitudinal side view showing a conventional example,

FIG. 9 is a simplified plan view thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Horizontal underframe 2 Tilting stand 3 Attitude holding frame 4 Axis 5 Link mechanism 6 Jack 7 Propulsion reaction force receiving stand 8 Propulsion jack 9 Overturn prevention stand A Horizontal well B Slope C

Continuation of the front page (72) Inventor Tsutomu Mizobata 2-2-2 Matsuzaki-cho, Abeno-ku, Osaka-shi Okumura Gumi Co., Ltd. (56) References JP-A-2-269295 (JP, A) (58) Fields investigated Int.Cl. ⁷ , DB name) E21D 9/02 E21D 9/06 301

Claims (2)

(57) [Claims] 1. A horizontal underframe fixed to the bottom of a horizontal shaft,
A tilting gantry which is superimposed on the horizontal underframe, and a rear end of which is pivotally attached to the rear end of the horizontal underframe so as to be able to swing up and down, and on which the inclined shaft excavator is mounted and installed; and A telescopic means such as a jack forcibly raising and lowering the horizontal underframe, a propulsion reaction receiving pedestal for supporting the rear end face of the inclined shaft excavator on the tilting gantry at the time of starting, a propulsion reaction receiving pedestal and an inclined shaft excavator And a propulsion means such as a jack interposed between the rear end of the shaft excavator and the vehicle. 2. A method according to claim 1, characterized in that it comprises a fall prevention frame which is interposed to support the bottom of the tilting frame between the tilting frame standing upright to the bottom surface at a predetermined angle in the horizontal mine
A starting device for the inclined shaft excavator according to the above.