JP2808521B2 - Shield excavator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shield excavator having slide spokes.

[0002]

2. Description of the Related Art FIG. 3 is a schematic side view showing a shield excavator having slide spokes.

[0003] As shown in the figure, a shield excavator for excavating the ground has a cutter head 12 rotatably mounted in front of a cylindrical excavator body 11. The cutter head 12 has a cut-spoke 13 and a cut-spoke 13.
A large number of cutter bits 14 for excavating the ground are fixed to the front surface. A slide spoke 15 is supported by the cutter spoke 13 so as to be able to freely expand and contract (extend and move) in the digging radial direction, and the cutter head 12 is configured by the cutter spoke 13 and the slide spoke 15. Cutter head 12
Is turned by a cutter turning drive unit 16.

A plurality of shield jacks 17 are arranged in a circumferential direction at a rear portion of the excavator body 11, and the shield jacks 17 extend rearward in the excavation direction of the shield excavator. When the shield jack 17 extends rearward in the excavation direction, the existing segment 10a constructed on the inner peripheral surface of the tunnel is formed.
, And the excavator body 11 is moved forward by the reaction force. In the figure, reference numeral 18 denotes a segment elector device,
Excavator body 11 advanced by shield jack 16
A tunnel is constructed by mounting a new segment 10b in a space between the existing segment 10a and the existing segment 10a.

On the other hand, a spoke slide jack (slide jack) 19 is provided on the cut spoke 13.
The slide jack 19 is connected to the slide spoke 15 through a cut-spoke slide device (slide device) 20. That is, by driving the slide jack 19, the slide spokes 1
5 expands and contracts in the excavation radial direction, and the outer peripheral ring 21 is positioned at a predetermined position. Since the extension movement of the slide spokes 15 is started after the excavator body 11 reaches the excavation position, until the excavator body 11 reaches the excavation position,
The cutter spoke 13 and the slide spoke 15 are connected by a fixing pin (not shown). As a result, even if a hydraulic leak or the like occurs until the excavator body 11 reaches the excavation position and the slide jack 19 shrinks, the slide spoke 15 shrinks, the outer peripheral ring 21 comes off, and the cutter head 12 cannot rotate. Is prevented.

In order to excavate and form a tunnel with the above-mentioned shield excavator, first, the excavator body 11 is made to reach the excavation position while the cut-spoke 13 and the slide spoke 15 are connected by a fixing pin (not shown). Since the cutter spokes 13 and the slide spokes 15 are connected by fixing pins (not shown), the slide spokes 15 do not shrink until the excavator body 11 reaches the excavation position, and the cutter head 12 cannot rotate. It will not be.

After the excavator body 11 reaches the excavation position,
A drilling machine (not shown) is mounted inside the excavator body 11, and a fixing pin (not shown) connecting the cutter spoke 13 and the slide spoke 15 is cut by the drilling machine (not shown). After cutting the fixing pin (not shown),
The slide jack 19 is driven to extend the slide spokes 15 with respect to the cut spokes 13, and the diameter of the cutter head 12 is adjusted to the width of the section required for excavation.

In this state, the plurality of shield jacks 17 are operated, and the shield excavator body 11 is advanced by the reaction force against the existing segment 10a. At the same time, the cutter head 12 is turned by the cutter turning drive device 16, and the ground is excavated by the cutter bit 14.
Next, one of the shield jacks 17 is operated in the contracting direction to form a space between the shield jack 17 and the existing segment 10a,
A new segment 10b is mounted in this space by the segment erector device 18. By repeating this operation, a tunnel of a predetermined length is excavated and formed.

[0009]

In the conventional shield excavator, the cut spokes 13 and the slide spokes 15 are connected by fixing pins (not shown) in order to prevent the slide spokes 15 from shrinking. Therefore, when the slide spokes 15 are extended to use the shield excavator, it is necessary to cut a fixing pin (not shown) by a drilling machine (not shown). Therefore, much work and time is required for attaching the drilling machine (not shown) to the shield excavator body 11 and cutting the fixing pin (not shown), and the extension work of the slide spokes 15 is not performed. It was inefficient work.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a shield excavator which can easily extend a slide spoke.

[0011]

In order to achieve the above object, a shield excavator according to the present invention is provided with a cut-spoke that is rotatably mounted on a front surface thereof, and a slide-spoke is freely movable on the cut-spoke in the excavation radial direction. The shield excavator supported by the cutter excavator and having a cutter head is provided with a holding jack for restricting the movement of the slide spoke with respect to the cut spoke.

According to another aspect of the present invention, there is provided a shield excavator in which the holding jack is housed in a beam connecting a cutter head and a cutter head driving unit.

[0013]

[Function] By driving the holding jack to one side, the movement of the slide spoke with respect to the cut spoke is restricted to prevent the expansion and contraction of the slide spoke, and by driving the holding jack to the other side, the movement of the slide spoke is prevented. to enable. In addition, since the holding jack is housed in the beam, the size of the apparatus is prevented from being increased.

[0014]

1 is a schematic side view of a cutter head of a shield excavator according to one embodiment of the present invention, and FIG. 2 is a view taken along the line II-II in FIG. Since the configuration other than the cutter head is the same as that shown in FIG. 3, the description and illustration are omitted.

As shown in the figure, a cutter head 31 is rotatably mounted at the front of a cylindrical excavator body 11, and a cutter spoke 32 of the cutter head 31 is provided.
Is fixed to a cutter bit 33 for excavating the ground. A slide spoke 34 is supported on the cutter spoke 32 so as to be able to expand and contract in the direction of the digging radius, and the slide spoke 34 is provided with an outer ring 21. A spoke slide jack (slide jack) 35 is provided on the cutter spoke 32, and the slide jack 35 is connected to a slide spoke 34 via a cut-spoke spoke slide device (slide device) 36. That is, the driving of the slide jack 35 causes the slide spokes 34 to expand and contract in the excavation radial direction with respect to the cut spokes 32, and the outer peripheral ring 21 is positioned at a predetermined position. The cutter head 31 is driven to turn by the cutter turning drive device 16 (cutter head driving unit).

The cutter turning drive 16 and the cutter head 3
A holding jack 38 is mounted in the intermediate beam 37 connecting the first and the second jacks 1. The driving of the holding jack 38 causes the stopper 39 to move up and down in the digging direction (the direction of the arrow A in the figure). When the stopper 39 projects by driving the holding jack 38,
The stopper 39 is locked to the slide spoke 34 to prevent the slide spoke 34 from contracting. That is, the movement of the slide spokes 34 with respect to the cut spokes 32 is restricted by the holding jacks 38. Holding jack 38
When the stopper 39 is retracted by the drive, the engagement of the stopper 39 with the slide spoke 34 is released, and the slide spoke 34 can be contracted.

In order to excavate and form a tunnel with the above-mentioned shield excavator, first, the excavator body 11 reaches the excavation position while the movement of the slide spokes 34 with respect to the cut spokes 32 is restricted by the holding jack 38. That is, the stopper 39 is projected by the driving of the holding jack 38, and the stopper 39 is attached to the slide spoke 34.
And the contraction of the slide spoke 34 is prevented. Thereby, even if a hydraulic leak or the like occurs in the slide jack 35 until the excavator body 11 reaches the excavation position,
The slide spokes 34 do not shrink, and the cutter head 31 does not become unrotatable.

After the excavator body 11 reaches the excavation position,
The stopper 39 is retracted by driving the holding jack 38, and the engagement of the stopper 39 with the slide spoke 34 is released to allow the slide spoke 34 to contract. In this state, the slide jack 35 is driven to extend the slide spokes 34 with respect to the cut spokes 32, and the diameter of the cutter head 31 is adjusted to the width of the section required for excavation.

As shown in FIG. 3, a plurality of shield jacks 17 are operated in this state, and the existing segment 10a is
The shield excavator main body 11 is moved forward by the reaction force against pressing. At the same time, the cutter head 31 is turned by the cutter turning drive device 16, and the ground is excavated by the cutter bit 33. Next, one of the shield jacks 17 is operated in the contracting direction to form a space between the shield jack 17 and the existing segment 10a, and a new segment 10b is mounted in the space by the segment elector device 18. By repeating this operation, a tunnel of a predetermined length is excavated and formed.

In the above-described shield excavator, the stopper 39 is engaged with the slide spoke 34 by driving the holding jack 38 so that the slide spoke 34 is prevented from contracting. Therefore, the slide spokes 34 do not shrink before the excavator body 11 reaches the excavation position. Further, the stopper 39 is disengaged from the slide spoke 34 by retracting the stopper 39 by driving the holding jack 38. For this reason, the expansion and contraction of the slide spokes 34 becomes possible. Accordingly, the driving of the holding jack 38 can easily prevent the slide spokes 34 from contracting and cancel the contraction prevention. In addition, since the holding jack 38 is mounted in the intermediate beam 37 that connects the cutter turning drive device 16 and the cutter head 31, the size of the device is prevented from being increased.

The holding jack 38 is driven to move the stopper 39 out and out to prevent the slide spokes 34 from contracting and canceling the contraction. However, the holding jacks 38 directly contact the slide spokes 34. Then, the contraction may be stopped and the contraction may be released. Further, the driving of the holding jack 38 causes the slide spoke 3
Although the contraction of the slide spokes 4 is prevented, the extension and contraction of the slide spokes 34 may be blocked.

[0022]

The shield excavator of the present invention is provided with a holding jack for restricting the movement of the slide spokes with respect to the cut spokes, and by driving the holding jack to one side, the movement of the slide spokes relative to the cut spokes is restricted. The slide spokes are prevented from extending and retracting, and the holding jack is driven to the other side, thereby enabling the movement of the slide spokes. Release can be performed. As a result, the extension work of the slide spoke can be easily performed, and the operation can be simplified and the operation time can be reduced. In addition, since the holding jack was stored in the beam connecting the cutter head and the cutter head drive unit,
There is no danger of the device becoming larger.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a cutter head of a shield excavator according to one embodiment of the present invention.

FIG. 2 is a view taken along line II-II in FIG.

FIG. 3 is a schematic side view of a conventional shielded excavator having slide spokes.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Shield excavator main body 16 Cutter turning drive device 21 Outer ring 31 Cutter head 32 Cutter spoke 33 Cutter bit 34 Slide spoke 35 Spoke slide jack (slide jack) 36 Cutter spoke slide device (slide device) 37 Intermediate beam 38 Holding jack 39 Stopper

Claims (2)

(57) [Claims] 1. A shield spoke excavator in which a cutter spoke is mounted on a front surface of the cutter excavator so that the cutter spoke is freely rotatably mounted on the front surface of the cutter spoke, and a slide spoke is supported on the cutter spoke so as to be able to expand and contract in the excavation radial direction. A shielded excavator comprising a holding jack for restricting movement with respect to the excavator. 2. The shield excavator according to claim 1, wherein the holding jack is housed in a beam connecting the cutter head and a cutter head driving unit.