JP2895409B2 - Excavation equipment for rock drilling shield machines - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an excavation device for a rock excavation shield machine which can be excavated in the construction of a rock geological curve.

[0002]

2. Description of the Related Art Generally, a disk cutter is mounted on a cutter head of a rock drilling shield machine for the purpose of crushing rocks and gravel and for protecting a cutter bit. For example, as shown in a side view of FIG. 4 and a front view of FIG. 5, a cutter head 3 is rotatably supported at a front end of a shield machine main body 1 through a large-diameter bearing 2, and a cutter bit is provided on a front surface of the cutter head 3. 4 and a plurality of disk cutters 5 are mounted. When the cutter head 3 is rotated by the hydraulic motor 6 and at the same time the shield machine 7 takes a reaction force to the existing segment 8 by the extension operation of the shield jack 7, the cutter machine body 1 moves forward. A disk cutter 5 mounted on the head 3 is pressed against the face to crush rocks and gravel and protect the cutter bit 4.

[0003] However, when excavating a tunnel curved portion with the cutter head 3 of such a rock excavation shield machine, there are several places on the outer peripheral curved surface of the cutter head 3 as shown in FIGS. 6A and 6B. The outer disk cutter 5 of one pair of disk cutters 5 can be moved out of the pair of disk cutters 5. The shield machine is stopped at the time of constructing the curved portion of the tunnel, and the worker can remove the manhole of the bulkhead from the shield machine body. After entering the chamber 9, the disk cutter 5 outside the pair of disk cutters 5 is manually pushed out of the outer periphery, and the spacer 10 is inserted and fixed as shown in FIG. Have gone,
Also, after finishing the construction of the curved part, stop the shield machine again,
It is necessary for an operator to enter the chamber 9 and return the position of the outer disk cutter 5 to a position before the curved portion is constructed.
Therefore, the operator is required to carry out heavy manual work and dangerous work in the chamber 9 by hand, and to push out the disk cutter 5,
The stoppage of the shield machine for the retraction operation causes a reduction in work efficiency. Further, in order to push the disk cutter 5 in the outer circumferential direction by human power, a scissoring operation for shaving off the bedrock where the disk cutter 5 protrudes is necessary.

[0004]

DISCLOSURE OF THE INVENTION The present invention has been proposed in view of the above circumstances, and it is possible to continuously excavate a tunnel curve section without stopping a shield machine, thereby improving work efficiency. Provided is an excavation device for a rock excavation shield machine capable of improving construction and shortening a work process, thereby reducing construction costs, preventing a worker from entering a chamber behind a cutter head, preventing danger, and eliminating heavy strut work. With the goal.

[0005]

SUMMARY OF THE INVENTION For this purpose, the present invention relates to a disk cutter which is mounted on the front surface of a cutter head in front of a shield machine main body for performing rock mass geological tunneling work having a curved portion and which can perform excavation at a curved portion. The disk cutter is held on a holding frame by a disk mounting plate, the holding frame is rotatably supported on a cutter head by a fixed pin receiving plate on a side thereof, and a hydraulic cylinder is provided on the bottom of the holding frame. Is attached.

[0006]

According to the surveillance device of the rock excavation shield machine of the present invention, the disc cutter mounted on the front of the cutter head is pushed out by a hydraulic cylinder by remote control in the excavation at the time of constructing the curved part of the rock geological tunnel construction. This allows for excavation of the tunnel curve. As a result, it is possible to eliminate the heavy work and the dangerous work of the worker, and it is possible to continuously excavate without stopping the shield machine, thereby improving the work efficiency.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partial front view of the present invention, and FIG. 2 is a sectional view taken along the line II-II of FIG. 3 is a partial front view of the operating state. In FIGS. 1 and 2, a pair of disk cutters 5 are arranged at several places on the front surface of the cutter head 3 along the outer peripheral curved surface. Among the disk cutter pairs, one pair of disk cutters 5 Holding frame 11
And held by the disk cutter mounting plate 12. A fixing pin receiving plate 13 protruding from a base end portion of the holding frame 11 is provided with a fixing pin 14 fixed to the cutter head 3.
A hydraulic cylinder 15 is attached to the bottom of the holding frame 11 so as to be rotatable around the holding frame 11. As shown in FIG. 2, a chamber 9 is provided at the rear of the cutter head 3, a skin plate 16 is provided above the chamber 9, and a cutter head drive shaft 17 is provided below the chamber. In such an apparatus, as shown in FIG. 3, when the tunnel curved portion is constructed, the pair of disk cutters 5 is formed into an arc shape along the outer peripheral surface of the cutter head 3 with the fixing pin 14 as a base point by the operation of the hydraulic cylinder 15. It is extruded and can be dug.

Thus, according to this apparatus, the shield machine is stopped because the hydraulic cylinder 15 is used to protrude the disk cutter 5 on the outer peripheral curved surface of the cutter head 3 in the excavation of the curved part in the tunnel construction of the rocky geology. The work efficiency can be improved because the work can be continuously excavated without any work, and the work cost can be reduced by shortening the work process. In addition, since the excavation of the curved section of the tunnel can be performed by remote control, there is no need for the operator to enter the chamber 9 at the rear of the cutter head 3, thereby preventing danger and eliminating heavy muscle work.

[0009]

In summary, according to the present invention, there is provided a disk cutter which is mounted on the front surface of a cutter head in front of a shield machine main body for performing a rock geological tunnel construction having a curved portion and is capable of performing excavation on a curved portion. The cutter was held on the holding frame by the disk mounting plate, and the holding frame was rotatably supported on the cutter head by the fixing pin receiving plate on the side thereof around the fixing pin, and a hydraulic cylinder was mounted on the bottom of the holding frame. As a result, the excavation of the tunnel curve section can be continuously excavated without stopping the shield machine, the work efficiency is improved, the work process is reduced by shortening the work process, and the worker is placed in the chamber behind the cutter head. The present invention is industrially very useful because it is possible to obtain an over-drilling device for a rock excavation shield machine that eliminates the necessity of entry and can prevent danger and eliminate heavy strut work. It is such.

[Brief description of the drawings]

FIG. 1 is a partial front view of an embodiment of an after-digging device of a rock excavation shield machine of the present invention.

FIG. 2 is a sectional view taken along the line II-II of FIG.

FIG. 3 is a partial front view in an operating state.

FIG. 4 is a side view of a known rock drilling shield machine.

FIG. 5 is a front view of the same.

FIG. 6 is an explanatory view of a conventional excavation device for a rock excavation shield machine.

[Description of Signs] 3 Cutter head 5 Disc cutter 11 Holding frame 12 Disc cutter mounting plate 13 Fixing pin receiving plate 14 Fixing pin 15 Hydraulic cylinder

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E21D 9/08

Claims (1)

(57) [Claims] 1. A disk cutter which is mounted on a front surface of a cutter head at a front part of a shield machine body for performing a rock geological tunnel construction having a curved part and capable of performing an excavation on a curved part, wherein the disk cutter is held by a disk mounting plate. Rock excavation, wherein the rocker is held on a frame, the holding frame is rotatably supported on a cutter head around a fixing pin by a fixing pin receiving plate on a side thereof, and a hydraulic cylinder is mounted on the bottom of the holding frame. Excavation equipment for shield machines.