JPH0765470B2 - Attitude control device for shield machine - Google Patents

Description

TECHNICAL FIELD The present invention relates to a posture control device for a shield machine.

<< Prior Art >> In the construction of a tunnel by a shield machine, rolling of the shield machine occurs due to factors such as changes in the properties of the ground and uneven thrust of the shield jack.

Even if a tunnel with a shield machine is constructed, the rolling of the shield machine affects the slipping work and the driving operation of the shield machine, and when constructing an elliptical or spectacle-shaped tunnel, it is used for assembling a segment. Cause great trouble.

Therefore, conventionally, when rolling occurred in the shield machine, it was corrected by rotating the cutter in reverse, but with such a correction means, there is a problem that it is difficult to correct when the excavated soil is cohesive soil. there were.

To solve such a problem, Japanese Utility Model Publication No. Sho 61-31102 proposes a rolling correction device for a shield machine, which is provided with a resistance plate that can project and retract toward the front ground of the cutter.

However, the rolling correction device shown in this publication has the technical problems described below.

<< Problems to be Solved by the Invention >> That is, since the rolling correction device disclosed in the above publication is performed in a state where the cutter rotation of the shield machine is stopped, the excavation efficiency is reduced accordingly.

Further, the resistance plate is housed inside a box provided with a box inside the earth pressure chamber separated by the partition wall installed on the back side of the cutter, and the front surface of the cutter is installed by the rod of the driving means installed outside the partition wall. Since it is operated in and out of the ground, if there is no need to correct the rolling, leaving it as it is will hinder the rotation of the cutter. Had to be closed, which made the correction device cumbersome to handle.

The present invention has been made in view of such conventional problems, and an object thereof is to correct rolling without stopping rotation of the cutter, and further,
An object of the present invention is to provide an attitude control device for a shield machine, which can easily perform the correction operation.

<Means for Solving the Problem> In order to achieve the above-mentioned object, the present invention provides a posture control device for a shield machine, comprising a face plate or a spoke-shaped cutter on the front side of a machine body, in the cutter. And a resistance plate projecting from the front of the cutter as needed.

<Operation> According to the attitude control device of the shield machine of the above configuration, the resistance plate that corrects the rolling is built in the inside of the cutter, so that the resistance plate that protrudes without stopping the rotation of the cutter is used. You can correct the rolling of the machine body.

Further, since the protrusion / retraction of the resistance plate is controlled by, for example, a hydraulic or electrically driven jack, it can be controlled by a simple on / off operation.

<Example> Hereinafter, a preferred example of the present invention will be described in detail with reference to the accompanying drawings.

1 to 3 show an embodiment of an attitude control device for a shield machine according to the present invention.

The attitude control device shown in the figure is an application of the present invention to an earth pressure type shield excavator.
Is the excavator body 10 with both ends open, and the excavator body 10
And a cutter 12 for excavating a circular section rotatably arranged on the tip side of the.

The excavator main body 10 has a substantially 8-shaped cross section in which circles having substantially the same diameter are partially overlapped with each other on the central axis. A plurality of shield jacks 16 that provide a reaction force to a segment 14 that is sequentially assembled and installed on the rear end side of the excavator body 10 are provided at intervals in the circumferential direction.

In addition, inside the excavator body 10, an erector 18 for assembling the segment 14 and a segment push-up device that pushes up the segment 14 received from this erector 18 to the shield tail portion and widens the interval to facilitate assembly. 20 and are installed.

The cutter 12 has a pair of face plates whose center of rotation is located at a predetermined interval on the central axis of the excavator body 10 in the horizontal direction, and excavable rotational ranges partially overlap on the central axis. It is composed of cutter discs 12a, 12b in the shape of one, and one of the cutter discs 12b is slid backward because it is characterized by interfering with each other during rotation.

Each of the cutter discs 12a, 12b, a plurality of slit openings 12c for radially extending earth and sand are provided at intervals in the circumferential direction, and at the periphery of each slit opening 12c,
A lot of cutter bits 12d for excavating earth and sand are planted.

A rotary shaft 22 is fixedly provided at the center of the rear surface side of each of the cutter discs 12a and 12b.

The rotating shaft 22 extends rearward through a partition wall 26 fixed to the excavator body 10 at a predetermined distance from the back surfaces of the cutter discs 12a, 12b, and has bearings 27 at the respective penetrating portions.
The rotary shaft 22 is rotatably supported and is connected to the rear end of the rotary shaft 22 with a rotation driving motor 28.

The partition wall 26 defines an earth pressure chamber 32 that is filled with the earth and sand excavated by the cutter 12 to fill the earth and face the face.
Two openings are provided in 26, and a pair of screw conveyors 34 for removing the excavated earth and sand filled in the earth pressure chamber 32 while preventing the collapse of the cutting face are installed in the openings, respectively. There is.

The member 36 shown in FIG. 1 is a tail seal fixed to the rear end of the excavator body 10.

On the other hand, the posture control device B of the present invention is installed every other space between the slit openings 12c of the cutter discs 12a and 12b.

As shown in FIG. 3, the attitude control device B includes a resistance plate 40 having a plurality of protrusions 38 on its front surface, a wedge-shaped slide member 42 that abuts the lower surface of the resistance plate 40, and a slide member.
It is composed of a telescopic jack 44 for moving 42 in the radial direction of the cutter discs 12a, 12b.

The jack 44 has a hydraulic hose that controls the expansion and contraction operation.
46 is connected, and the hydraulic hose 46 passes through the inside of the rotary shaft 22 and is separated by a swivel provided on the rotary shaft portion.
Extends to the rear of 26 and has hydraulic equipment (not shown) at one end
Are connected.

The attitude control device B having such a configuration is built in each of the cutter discs 12a and 12b, and when the jack 44 is driven by the oil sent through the hydraulic hose 46,
The resistance plate 40 is configured to be pushed by the inclined surface of the slide member 42 and project from the hole portion 12e formed in the cutter disk disks 12a and 12b toward the natural ground side (see FIG. 3 (B)). .

The member indicated by reference numeral 12f in FIG. 3 is a guide piece that is fixed to the peripheral edge of the hole 12e and guides the withdrawal movement of the resistance plate 40.

In the shield machine A having the above structure, the cutter disk 12a, 12b is rotationally driven by the drive motor 28, and the excavated earth and sand taken into the earth pressure chamber 32 is gradually secured while ensuring the stability of the cutting face. If the soil is expelled and propelled by the screw conveyor 34, excavation of a section corresponding to the section of the excavator body 10 is performed.

At this time, when the rolling occurs in the shield machine A, the attitude control device B is driven and the rolling is corrected.

In the rolling correction, the jack 44 of the attitude control device B located in the front in the rolling direction is driven, and the resistance plate 40 is projected to the natural side, as shown in FIG. 3 (B).

When the resistance plate 40 projects, the projection 38 on the front side and the resistance plate 40
Bites into the ground, and the rotation resistance of the cutter disk machines 12a and 12b increases, whereby the rolling of the shield machine A is corrected.

In this case, what is particularly noteworthy is that the rolling correction described above can be performed without stopping the rotation of the cutter disk discs 12a and 12b, which enables the correction without lowering the excavation efficiency.

Further, in the device B of the present embodiment, for example, when rolling occurs only on one cutter disc board and the other does not, the resistance plate on the rolling side is used.
The rotation axis of the rolling can also be changed by adjusting the position (angle) of 40.

Furthermore, for example, even when both the cutter discs 12a, 12b are displaced downward, by protruding the resistance plate 40, by rotating one of the cutter discs 12a clockwise, the other in the counterclockwise direction, It is also possible to correct the gap.

In addition, the attitude control device B uses the cutter discs 12a, 12
It is carried out by driving the jack 44 via the hydraulic hose 46 which is built in the inside of b and which is inserted through the inside of the rotary shaft 22, so that it does not hinder the rotation of the cutter discs 12a, 12b, and is simple. It can be done by operation.

In addition, in the said Example, although the case where this invention was applied to the excavator which construct | assembles a shield tunnel of a substantially 8-shaped type was illustrated, implementation of this invention is not limited to this, and it is not limited to this. It can also be applied to things.

Further, the jack 44 for retracting the resistance plate 40 may be an electric type other than the hydraulic type.

Further, the embodiment of the present invention is not limited to the face plate type cutter 12, but may be a spoke type cutter.

<< Advantages of the Invention >> As described in detail in the above, according to the attitude control device of the shield machine according to the present invention, rolling correction can be performed without stopping the rotational drive of the cutter, so that the shield machine The reduction of excavation efficiency by the machine is avoided.

Further, since the resistance plate of the attitude control device is built in the cutter, it does not affect the rotation of the cutter and the protruding operation thereof can be easily performed.

Further, in the case of the multiple shield shield machine, it is possible to easily change the rolling rotation axis and correct the pitching according to the planned route.

[Brief description of drawings]

FIG. 1 is an overall view of a shield machine to which the attitude control device according to the present invention is applied, FIG. 2 is a front view of the cutter of FIG. 1, and FIG. 3 is a sectional view of an essential part showing an example of the attitude control device. Is. 10 …… excavator body 12 …… Cutter B …… Attitude control device 40 …… Resistance plate 42 …… Slide member 44 …… Jack

Claims (1)

[Claims] 1. A posture control device for a shield machine, wherein a face plate or a spoke cutter is provided on the front side of a machine body, which is incorporated in the cutter and protrudes to the front surface of the cutter as necessary. An attitude control device for a shield machine, which is provided with a resistance plate.