JP3631892B2 - Drilling rig - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a drilling device that excavates the ground in front, and is suitable for use in shield excavators, shaft excavators, continuous wall excavators, and the like.
[0002]
[Prior art]
FIG. 6 shows a side cross-sectional view of a conventional drum cutter excavator, and FIG. 7 shows a partially cutaway plan view of the conventional drum cutter excavator.
[0003]
In the conventional drum cutter excavator, as shown in FIGS. 6 and 7, the skin plate 101 has a hollow cross section and has a rectangular shape, and the center of the front portion of the skin plate 101 extends along the vertical direction. A support plate 102 is fixed. Cylindrical drum cutters 103 and 104 are disposed on both sides of the support plate 102, and a large number of cutter bits 105 and 106 are fixed to the outer peripheral surfaces of the drum cutters 103 and 104. Drive motors 107 and 108 are mounted in the drum cutters 103 and 104, and the tip ends of the drive shafts 109 and 110 of the drive motors 107 and 108 are fixed to the support plate 102.
[0004]
In addition, a chamber chamber 112 is formed by fixing the bulkhead 111 to the front portion of the skin plate 101. A mud pipe 113 and a mud pipe 114 are connected to the chamber chamber 112. Further, a plurality of shield jacks 115 are arranged in the circumferential direction at the rear part of the skin plate 101, and the extension of the shield jack 115 causes the skin plate 101 to advance by the reaction force from the existing segment S. Can do.
[0005]
Therefore, in order to excavate and form a tunnel, first, the drum cutters 103 and 104 are rotated by the drive motors 107 and 108, respectively, and the plurality of shield jacks 115 are extended and pressed against the existing segment S by the skin reaction force. Advance 101. Then, a large number of cutter bits 105 and 106 of the drum cutters 103 and 104 excavate the ground in front and excavate and form a tunnel. Then, the excavated sediment is taken into the chamber chamber 112, and the mud mixed with water supplied from the mud pipe 113 is discharged to the outside through the mud pipe 114. Next, any one of the shield jacks 115 is operated in the contracting direction to form a space with the existing segment S, and a new segment S is mounted in this space by an unillustrated erector device. By repeating this operation, a tunnel having a predetermined length can be formed by excavation.
[0006]
[Problems to be solved by the invention]
By the way, in an urban area where structures, roads, and railways are mixed in the underground part, there is a demand for excavation work with variable tunnel widths at tunnel branching and joining points. In recent years, the range of use of tunnels has expanded, and it is necessary to install various equipment and facilities such as cables and pipes related to power, communications, and water in the tunnel. In addition, there is a desire to excavate the part that accommodates them.
[0007]
However, in the conventional drum cutter excavator described above, the widths of the drum cutters 103 and 104 for excavating the ground are constant, and the tunnel width cannot be made variable.
[0008]
The present invention solves such problems, and an object of the present invention is to provide a highly versatile excavator by making it possible to easily change the excavation width.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, an excavation apparatus according to the first aspect of the present invention is an excavation apparatus comprising left and right drum cutters that are mounted on a front portion of an excavator body and have a horizontal rotation axis in a direction substantially perpendicular to the excavation direction. in the apparatus, provided with a closable widening drum haunt rotation axis direction of the drum cutter outward of the right and left drum cutter, fitted with a telescopic cutter to be projectable radially outwardly to the outer peripheral portion of the enlarged width drum It is characterized by this.
[0010]
The excavator of the invention of claim 2 is characterized in that the excavator body is provided with a widening portion that widens with the movement of the widening drum relative to the drum cutter.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0012]
One flat section of the drum cutter in a drum cutter excavator as drilling apparatus according to the embodiment, II-II line cross section of FIG. 1 in FIG. 2, a perspective schematic of the drum cutter in Figure 3 of the present invention in FIG. 1, FIG. 4 shows a flat section of the drum cutter drilling width is changed, the partially cutaway plan view of the drum cutter excavator of the present embodiment in FIG. 5.
[0013]
In the drum cutter excavator of the present embodiment, as shown in FIG. 5, the skin plate 11 has a hollow cross section and has a rectangular shape, and is supported along the vertical direction at the center of the front portion of the skin plate 11. The plate 12 is fixed. A pair of left and right drum cutters 13 and 14 having horizontal rotation axes that are substantially orthogonal to the excavation direction are mounted on both sides of the support plate 12. Each of the drum cutters 13 and 14 has a cylindrical shape, and the excavation width can be changed by the widening drums 15 and 16 protruding and protruding from the outer end portions. The pair of left and right drum cutters 13 and 14 and the widening drums 15 and 16 have substantially the same structure. Only one drum cutter 13 and the widening drum 15 will be described, and the other drum cutter 14 and the widening drum 15 will be described. 16 will be assigned the same reference numerals and detailed description thereof will be omitted.
[0014]
That is, as shown in FIGS. 1 to 3, the drum cutter 13 has a large number of cutter bits 17 fixed to the outer peripheral surface thereof, and when the drum cutter 13 rotates, a large number of cutter bits 17 excavate the front ground. be able to. The drum cutter 13 includes a drive motor 18, and a mounting flange 18 a is fixed by a bolt 19. In the drive motor 18, the drive shaft 20 extends to the support plate 12 side and is fixed to a connecting portion 21 of the support plate 12. Therefore, by rotating the drive shaft 20 by the drive motor 18, the drum cutter 13 to which the drive motor 17 is attached can be rotated with respect to the support plate 12.
[0015]
The outer end of the drum cutter 13 in the axial direction is opened in a hexagonal shape, and the widening drum 15 having the same hollow hexagonal shape is axially movable to the hexagonal opening of the drum cutter 13 via the seal member 22 and is circumferential. It is fitted so that it can rotate in one direction. A plurality of widening jacks 23 are attached to the widening drum 15, and the distal end portion of the drive rod 24 is connected to the flange portion 25 of the drum cutter 13. Therefore, the widening drum 15 can be moved relative to the drum cutter 13 by moving the widening jack 23 and extending and retracting the drive rod 24 so as to appear and disappear.
[0016]
A plurality of cutter bits 26 are fixed to the outer peripheral portion of the widening drum 15 at the end in the axial direction, and a plurality of extendable cutters 27 that can protrude and retract at the center in the axial direction are mounted. The telescopic cutter 27 can be moved by a cutter jack 28. When the widening drum 15 is in the drum cutter 13, the cutter jack 28 is contracted so that the telescopic cutter 27 is positioned in the widening drum 15, and the widening drum 15 is When in the position protruding from the drum cutter 13, the cutter jack 28 can be extended to allow the telescopic cutter 27 to project outward from the widening drum 15. Reference numeral 29 denotes a fixing plate which is fixed to the widening drum 15 and conceals the inside.
[0017]
As shown in FIG. 5, widening plates 31 and 32 are mounted on both sides of the skin plate 11 and can be moved by moving jacks 33 and 34. Accordingly, the widening plates 31 and 32 are moved by expanding and contracting the movable jacks 33 and 34 in accordance with the change of the excavation width due to the expansion and contraction of the widening drums 15 and 16 from the drum cutters 13 and 14, respectively. Can be.
[0018]
Further, a bulk head 35 is fixed to the front portion of the skin plate 11 to form a chamber chamber 36, and a mud feeding pipe and a mud discharging pipe (not shown) are connected to the chamber chamber 36. A plurality of shield jacks 37 are juxtaposed in the circumferential direction at the rear part of the skin plate 11, and the skin plate 11 moves forward due to the reaction force from the existing segment S by extending the shield jack 37. Can do.
[0019]
Therefore, in order to excavate the tunnel, as shown in FIGS. 1 and 5, the plurality of shield jacks 37 are extended to the existing segment S while rotating the drum cutters 13 and 14 by the drive motors 18 respectively. The skin plate 11 is moved forward by the pressing reaction force. Then, a number of cutter bits 17 of the drum cutters 13 and 14 excavate the ground in front and excavate and form a tunnel. The excavated sediment is taken into the chamber chamber 36, and the mixed mud supplied from the mud pipe is discharged to the outside through the mud pipe. Next, any one of the shield jacks 37 is operated in the contracting direction to form a space with the existing segment S, and a new segment S is mounted in this space by an unillustrated erector device. By repeating this operation, a tunnel having a predetermined length can be formed by excavation.
[0020]
By the way, in the drum cutter type excavator of this embodiment, as shown in FIG. 1, when the widening drums 15 and 16 are in the drum cutters 13 and 14, the excavation width is H1, but if necessary, The digging width of the lever can be changed. That is, as shown in FIG. 4, when the widening jack 23 is driven and the drive rod 24 is extended, the widening drum 15 (16) is moved outward in the axial direction with respect to the drum cutter 13 (14) and protrudes. At this time, the cutter jack 28 extends to cause the telescopic cutter 27 to protrude outward from the widening drum 15. Further, as shown in FIG. 5, as the excavation width is changed by moving the widening drums 15 and 16, the moving jacks 33 and 34 are extended, and the widening plates 31 and 32 are moved outward. Therefore, the excavation width by the drum cutter excavator can be changed from H1 to H2.
[0021]
In this state, when the drum cutters 13 and 14 are rotated while the skin plate 11 is advanced in the same manner as described above, the drum cutters 13 and 14 and the widening drums 15 and 16 in the fitted state rotate, and the cutter bit 17 , 26 and the telescopic cutter 27 can excavate a tunnel having an excavation width H2 by excavating the ground in front. At this time, the gap between the existing tunnel and the existing segment S is the backfill injection range C.
[0022]
As described above, in the drum cutter excavator of this embodiment, the widening drums 15 and 16 are fitted to the outer end portions in the axial direction of the drum cutters 13 and 14 so as to rotate integrally and freely move in the axial direction. By providing the telescopic cutter 27 that can protrude outward when the protrusions 15 and 16 are provided, the excavation width can be easily changed.
[0023]
In the above-described embodiment, the digging width is changed by projecting both of the widening drums 15 and 16 from the drum cutters 13 and 14, but only one of the widening drums 15 is projected to change the digging width. Also good. Moreover, the tunnel itself to be excavated can be enlarged by attaching the shield jack 37 to the widening plates 31 and 32.
[0024]
【The invention's effect】
As described above in detail in the embodiment, according to the excavator of the invention of claim 1, the left and right drums that are mounted on the front portion of the excavator main body and have a horizontal rotation axis in a direction substantially perpendicular to the excavation direction. in drilling device with a cutter, to be projectable provided with a closable widening drum haunt rotation axis direction of the drum cutter outward of the right and left drum cutter, radially outward to the outer peripheral portion of the enlarged width drum Since the telescopic cutter is installed, the excavation width can be easily changed by moving the widening drum with respect to the drum cutter and making the telescopic cutter appear and disappear as necessary. Can do.
[0025]
According to the excavating apparatus of the invention of claim 2, since the widening portion that widens with the movement of the widening drum with respect to the drum cutter is provided, By moving the widening section, it is possible to increase the strength of the excavation section and expand the excavation range.
[Brief description of the drawings]
FIG. 1 is a plan sectional view of a drum cutter in a drum cutter excavator as an excavator according to an embodiment of the present invention.
2 is a cross-sectional view taken along line II-II in FIG.
FIG. 3 is a schematic perspective view of a drum cutter.
4 is a plan sectional view of a drum cutter drilling width is changed.
FIG. 5 is a partially cutaway plan view of the drum cutter excavator of the present embodiment.
FIG. 6 is a side sectional view of a conventional drum cutter excavator.
FIG. 7 is a partially cutaway plan view of a conventional drum cutter excavator.
[Explanation of symbols]
11 Skin plate (excavator body)
12 support plates 13 and 14 drum cutters 15 and 16 widening drum 17 cutter bit 18 drive motor 23 widening jack 26 cutter bit 27 telescopic cutter 28 cutter jacks 31 and 32 widening plate (widening part)
33, 34 Moving jack 37 Shield jack

Claims (2)

An excavator provided with left and right drum cutters mounted on a front portion of an excavator body and having a horizontal rotation axis in a direction substantially perpendicular to the excavation direction, wherein the rotation shaft of the drum cutter is disposed outward of the left and right drum cutters. provided with a closable widening drum haunt center direction, the drilling apparatus being characterized in that fitted with extendable cutter to be projectable radially outwardly to the outer peripheral portion of the enlarged width drum. 2. The excavator according to claim 1, wherein the excavator body is provided with a widening portion that widens with the movement of the widening drum relative to the drum cutter.

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