JP3636538B2 - Leading cutter device for backfilling agent injection pipe in shield machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a leading cutter device for a backfilling agent injection pipe in a shield machine capable of cutting a portion facing the backfilling agent injection pipe on the inner peripheral surface of the tunnel excavated at the same time.
[0002]
[Prior art]
Conventionally, an example of this type of shield machine is shown in FIG. This is one in which a plurality of backing agent injection pipes 3 project from the rear part of the outer peripheral surface of the excavator main body 2 rotatably provided with the cutter head 1 at a predetermined interval along the circumferential direction. (See FIG. 7), the cutting head 4 is cut by rotating the cutter head 1 and the tunnel 5 is excavated. A back-filling agent such as mortar is ejected rearward from the rear end opening 3 a of the agent injection pipe 3, and the ejected back-filling agent is located between the segment 6 continuing behind the excavator main body 2 and the inner peripheral surface of the tunnel 5. The gap is filled.
[0003]
According to the above configuration, since the backing agent injection tube 3 protrudes outward from the outer peripheral surface of the excavator main body 2, if the ground is soft, the soft ground can be pushed forward, but the ground is If it is hard, the backing agent injection tube 3 is damaged by the hard ground.
[0004]
Therefore, as shown in FIGS. 8 and 9, a plurality of fixed bits 7 protrude from the back-filling agent injection pipe 3 on the outer peripheral surface of the excavator main body 2 at an appropriate position in front of the excavator main body 2. Along with this, the inner peripheral surface of the tunnel 5 is cut with a plurality of fixed bits 7 so that the backfilling agent injection tube 3 is not damaged.
[0005]
[Problems to be solved by the invention]
In the above-described conventional configuration, the cutting ability of the fixed bit 7 is low, so that it is difficult to cut the fixed bit 7 when it hits a strong ground or a retaining wall. Cannot be taken into the excavator main body 2, and the cut earth and sand are non-uniformly interposed between the inner peripheral surface of the tunnel 5 and the excavator main body 2 and the segment 6, thereby adversely affecting the natural ground and the excavator main body 2. There is a risk of giving.
[0006]
Therefore, as shown in FIG. 10, a recess 9 is formed at an appropriate position in front of the backing agent injection pipe 3 on the outer peripheral surface of the engraving machine body 2, and a cutter device 10 having the same function as the shield machine is disposed in the recess 9. In addition, the upper portion of the cutter device 10 is protruded to the outside from the outer peripheral surface of the excavator body 2, and the cutter head 10a of the cutter device 10 is rotationally driven to cut the inner peripheral surface of the tunnel 5, and the cutting It is conceivable to take the earth and sand that has passed through the recess 9 into the excavator main body 2, but this requires a large space for mounting the cutter device 10 on the excavator main body 2. It is extremely difficult to mount the cutter device 10.
[0007]
In view of the above problems, the present invention can cut the portion facing the backfilling agent injection pipe on the inner peripheral surface of the tunnel with high efficiency, and can take the cut earth and sand into the excavator body, And it aims at providing the shield machine which requires the space required for the cutting small.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 is a shield machine in which a backing agent injection pipe protrudes from the rear part of the outer peripheral surface of the machine main body provided with a cutter head rotatably at the front part. A through-hole is formed at an appropriate position in front of the backing agent injection pipe on the outer peripheral surface of the excavator main body, and a movable cylinder with a soil removal device is inserted into the through-hole so as to be movable along the radial direction of the excavator main body. A cutting cutter that is driven to rotate about the axis of the movable cylinder is disposed in the movable cylinder, and the tip of the cutting cutter is advanced by moving the movable cylinder in the radially outward direction. It is characterized by being configured to protrude outward from the outer peripheral surface of the machine body.
[0009]
In the above configuration, when excavating the tunnel, rotate the cutter head while moving the movable cylinder in the radially outward direction so that the tip of the cutting cutter protrudes outside the outer peripheral surface of the machine body. By driving, the face is cut to excavate the tunnel, and at the same time, the cutting cutter is rotationally driven to cut the portion of the inner peripheral surface of the tunnel facing the back-filling agent injection pipe, and the cut earth and sand are transferred to the moving cylinder. A segment and a tunnel that are taken into the excavator body through the earthing device provided, and a back agent such as mortar is ejected backward from the back agent injection pipe, and the back agent is connected to the rear of the excavator body. It fills the gap between the inner peripheral surface.
[0010]
In this case, since the cutting cutter is driven to rotate, the cutting ability is high, and even a solid ground or retaining wall can be cut reliably, and there is no possibility that the backing agent injection pipe is damaged by the ground. . In addition, the cut soil is taken into the excavator main body from the movable cylinder through the earth removing device, and the cut earth and sand is cut between the inner peripheral surface of the tunnel and the excavator main body and the segment. Therefore, the ground and the excavator body are not adversely affected by the cut earth and sand. Furthermore, the space required for the cutting is small, and the movable cylinder and the cutting cutter can be easily incorporated into the excavator body.
[0011]
The invention according to claim 2 is provided such that a multi-face type cutter head comprising a plurality of cutter heads is rotatably provided at a front portion of the excavator main body, and an outer periphery of the excavator main body is opposed to an intersection of the plurality of cutter heads. In a shield machine with a back-filling agent injection pipe projecting at the rear of the surface, a through hole is formed in an appropriate position in front of the back-filling agent injection pipe on the outer peripheral surface of the machine, and a soil removal device is provided in the through hole A movable cylinder is inserted so as to be movable along the radial direction of the main body of the excavator, and a cutting cutter that is driven to rotate about the axis of the movable cylinder is disposed in the movable cylinder. By moving the body in the radially outward direction, the tip of the cutting cutter is configured to protrude outward from the outer peripheral surface of the machine body.
[0012]
According to the above configuration, the tunnel is excavated by the multi-face type cutter head composed of a plurality of cutter heads, and at the same time, the cutting cutter is driven to rotate and the portion facing the backing agent injection pipe on the inner peripheral surface of the tunnel is cut. Therefore, there is no possibility that the back-filling agent injection tube is damaged, and the same effect as that of the first aspect of the invention can be obtained.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 3 show a backing agent injection pipe preceding cutter device of a shield machine that is an embodiment of the present invention, and is based on the backing agent injection pipe 3 on the outer peripheral surface of the machine 2. A through-hole 12 is formed at a location facing the atmospheric chamber of the excavator main body 2 forward, and a movable cylinder 14 with a soil removal device 13 moves in the through-hole 12 along the radial direction of the excavator main body 2. A movable cylinder that is inserted in the movable cylinder 14 and is rotationally driven around the axis of the movable cylinder 14 and moves the movable cylinder 14 back and forth in the radial direction. A driving device 16 is provided.
[0014]
As shown in FIG. 1, the movable cylinder 14 is movably inserted through a seal member 18 into a guide cylinder 17 concentrically fixed to the back surface of the outer wall 2a of the excavator main body 2 in a concentric manner with the through hole 12. Has been.
[0015]
As shown in FIGS. 1 to 3, the cutting cutter 15 is set to have substantially the same diameter as the width of the backing agent injection tube 3, and is rotatably disposed in the movable cylinder 14 via a bearing bush 19. A rotating cylinder 15a, a cross frame 15b laid in a cross shape in the rotating cylinder 15a, and a cutter bit 15c fixed to a tip portion 15A protruding above the rotating cylinder 15a of the cross frame 15b. The tip portion 15A is formed in a dome shape in accordance with the cross-sectional shape of the backfilling agent injection tube 3, and the cutter shaft 15d is a sealed box fixed to the bottom wall portion 14a of the movable cylinder 14 20 is connected to a drive shaft of a hydraulic motor 22 fixed to the bottom wall portion 14 a via a support frame 21 via a coupling 23, and is driven by driving the hydraulic motor 22. Cutting cutter It can rotate 15.
[0016]
As shown in FIGS. 1 and 2, the movable cylinder driving device 16 has a hydraulic jack 16a. The upper end of the hydraulic jack 16a is fixed to the reinforcing frame 2b of the outer wall 2a. To the lower bracket 26 fixed to the support frame 21 via a connection pin 27, and at a plurality of positions on the lower outer peripheral surface of the movable cylinder 14. A pair of guide rails 28 extending in the vertical direction protrude in parallel at a predetermined interval, and a detent key 29 inserted between the pair of guide rails 28 is fixed to the reinforcing frame 2b. By reducing the hydraulic jack 16a from the state shown in FIG. 2, the movable cylinder 14 is moved in the radially outward direction as shown by the solid line in FIG. It can be protruded outward from the outer peripheral surface of the main body 2.
[0017]
As shown in FIGS. 2 and 3, the earth discharging device 13 includes a mud feed pipe 32 with an on / off valve 31 and a mud pipe 33 with an on / off valve 31 communicating with the mud chamber 30 in the movable cylinder 14. The mud water in the mud chamber 30 is supplied from the mud pipe 32, and the mixture of the mud water and the earth and sand cut by the cutting cutter 15 is passed from the mud chamber 30 through the mud pipe 33 to the atmospheric chamber of the excavator main body 2. It is supposed to be taken in.
[0018]
In the above configuration, when excavating the tunnel 5, the movable cylinder driving device 16 moves the movable cylinder 14 in the radially outward direction so that the dome-shaped tip 15 </ b> A of the cutting cutter 15 is the outer peripheral surface of the excavator main body 2. The cutting cutter 15 is cut by the cutter head 1 to excavate the tunnel 5 (see FIG. 6), and at the same time, the cutting cutter 15 is driven to rotate by the hydraulic motor 22. Then, the portion of the inner peripheral surface of the tunnel 5 facing the backing agent injection pipe 3 is cut, the cut earth and sand are collected in the mud chamber 30, and the collected earth and mud water is discharged from the earth removing device 13. It is taken into the atmospheric chamber of the excavator main body 2 through the pipe 33, and at the same time, a back-filling agent such as mortar is ejected rearward from the backfilling agent injection pipe 3, and the backfilling agent is continued to the rear of the excavator main body 2. Of segment 6 and tunnel 5 It is adapted to fill the gap between the circumferential surface.
[0019]
In this case, since the cutting cutter 15 is driven to rotate, the cutting ability is high, and even a solid ground or retaining wall can be cut reliably, and the backing agent injection tube 3 may be damaged by the ground. There is no. Moreover, since the cut earth and sand are taken into the atmospheric chamber of the excavator main body 2 through the earth removing device 13 from the movable cylinder 14, the earth and sand cut as in the past is taken into contact with the inner peripheral surface of the tunnel 5. The backing agent is placed in the gap between the inner peripheral surface of the tunnel 5 and the segment 6 without interfering between the excavator body 2 and the segment 6 in a non-uniform manner and adversely affecting the ground and the excavator body. It can be filled reliably. Furthermore, the space required for the cutting is small, and the movable cylinder 14 and the cutting cutter 15 can be easily incorporated into the excavator main body 2.
[0020]
When the ground is soft and there is no possibility that the backing agent injection tube 3 is damaged by the soft ground, the movable cylinder driving device 16 is driven to extend, and the dome-shaped tip 15A of the cutting cutter 15 is driven. May be immersed inside the outer peripheral surface of the excavator main body 2 (see the phantom line in FIG. 1).
[0021]
In the above-described embodiment, the mud pipe shield machine 32 and the mud pipe pipe 32 and the mud pipe pipe 33 are used as the earth removing device 13 in the case of the muddy water type shield machine, but instead of this, as shown in FIG. In the case of an excavator, a screw conveyor 35 may be used.
[0022]
FIG. 5 shows a preceding cutter device for a backfilling agent injection pipe in a shield machine according to another embodiment of the present invention, which is a multi-face type comprising a plurality of cutter heads 1 at the front part of the machine 2. A cutter head is rotatably provided, and a backing agent injection pipe 3 (not shown) projects from the rear surface of the outer peripheral surface of the excavator main body 2 so as to face the intersection D of the plurality of cutter heads 1. A through hole 12 is formed at an appropriate position in front of the backing agent injection pipe 3 on the outer peripheral surface of the excavator main body 2, and the movable cylinder 14 with the earth removing device 13, the cutting cutter 15, and the movable cylinder are formed in the through hole 12. Since the body driving device 16 and the like are provided and the specific configuration is as described above, the description thereof is omitted.
[0023]
According to the above-described configuration, the tunnel 5 is excavated by the multi-face type cutter head including the plurality of cutter heads 1, and at the same time, the cutting cutter 15 is rotationally driven to face the backing agent injection pipe 3 on the inner peripheral surface of the tunnel 5. Since the portion is cut, there is no fear that the back-filling agent injection tube 3 is damaged, and substantially the same effect as that of the above-described embodiment can be obtained.
[0024]
【The invention's effect】
According to the first aspect of the present invention, since the cutting cutter is driven to rotate, the cutting ability is high, and even a solid ground or a retaining wall can be surely cut. There is no risk of damage. In addition, the cut soil is taken into the main body of the excavator from the movable cylinder through the earth removing device, and the cut earth and sand is cut between the inner peripheral surface of the tunnel and the main body of the excavator and the segment. Therefore, the ground and the excavator body are not adversely affected by the cut earth and sand. Furthermore, the space required for the cutting is small, and the movable cylinder and the cutting cutter can be easily incorporated into the excavator body.
[0025]
According to the second aspect of the present invention, the tunnel is excavated by the multi-face type cutter head composed of a plurality of cutter heads, and at the same time, the portion facing the backing agent injection pipe on the inner peripheral surface of the tunnel is rotated. Since it cuts, there is no possibility that the back-filling agent injection tube is damaged, and it is possible to obtain substantially the same effect as that of the first aspect of the invention.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a main part of a shield machine according to an embodiment of the present invention.
FIG. 2 is a longitudinal sectional view of the main part.
FIG. 3 is a plan view of the main part.
FIG. 4 is a longitudinal sectional view of a main part showing a modified example of the soil removal apparatus.
FIG. 5 is a schematic cross-sectional view of a shield machine according to another embodiment of the present invention.
FIG. 6 is a schematic plan view showing a state where excavation is performed by a conventional shield machine.
FIG. 7 is a schematic front view of the main part.
FIG. 8 is an enlarged cross-sectional view of the main part.
FIG. 9 is a side view of the main part.
FIG. 10 is a schematic side view showing another example of the prior art.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cutter head 2 Excavator main body 3 Backing agent injection pipe 12 Through-hole 13 Earth removal apparatus 14 Moving cylinder 15 Cutting cutter 15A Cutting cutter front-end | tip 16 Moving cylinder drive apparatus D Intersection of several cutter heads

Claims (2)

In a shield machine with a back-filling agent injection pipe projecting from the rear of the outer peripheral surface of the main body of the engraving machine with a cutter head rotatably provided at the front part, in front of the back-filling agent injection pipe on the outer peripheral surface of the main machine A through-hole is formed in the through-hole, and a movable cylinder with a soil removal device is inserted into the through-hole so as to be movable along a radial direction of the excavator main body, and the axis of the movable cylinder is centered in the movable cylinder. A cutting cutter that is rotationally driven is arranged, and the tip of the cutting cutter is configured to protrude outward from the outer peripheral surface of the machine body by moving the movable cylinder in the radially outward direction. The preceding cutter apparatus for the backfilling agent injection pipe in the shield machine characterized by the above-mentioned. A multi-face type cutter head composed of a plurality of cutter heads is rotatably provided at a front portion of the excavator main body, and a backing agent injection pipe is provided at the rear portion of the outer peripheral surface of the excavator main body so as to face the intersection of the plurality of cutter heads. In the shield machine, the through-hole is formed at a suitable position in front of the back-filling agent injection pipe on the outer peripheral surface of the machine body, and the movable cylinder with a soil removal device is placed in the through-hole. A cutting cutter is inserted in the movable cylinder so as to be movable along the radial direction, and is driven to rotate about the axis of the movable cylinder, and moves the movable cylinder in the radially outward direction. Thus, the leading cutter device for the backfilling agent injection pipe in the shield machine, wherein the tip of the cutting cutter is configured to protrude outward from the outer peripheral surface of the machine body.

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