JP2000213297A - Roundness maintaining device of segment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To appropriately maintain a segment of a steeply curved tunnel. SOLUTION: In this roundness maintaining device of segments, a device body 20 having a forward moving frame 23 and a backward moving frame 26 is independently arranged between a shield machine 11 and a rear truck, an upper support frame 29A and a lower support frame 29B abutting on an inner surface of a segment 6 advanced/retracted to/from a holding expansion device within a plane orthogonal to the axis of a shield are provided on the forward moving frame 23 and the backward moving frame 26, and a propelling means to advance the device body 20 by alternately advancing/retracting the forward moving frame 23 and the backward moving frame 26 to/from each other by a propulsion jack 31R is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for holding a segment in a round shape, which holds an assembled segment in a tunnel where a shield excavator is used, in particular, a sharp curve.

[0002]

2. Description of the Related Art As shown in FIG. 3, a conventional perfect circle holding device 1 is provided on a segment assembling device at the rear of a shield machine or an erection frame 2 connected to a rear bogie. A pair of right and left support carts 4R and 4L are respectively movably arranged via wheels 3 and a tuning cylinder device 5 arranged on the erection frame 2.
R and 5L are extended and contracted in accordance with the excavation of the shield excavator, so that the perfect circle holding device 1 can be stopped at a fixed position of the segment 6 with respect to the moving erection frame 2.
In addition, telescoping columns 7R and 7L each composed of a slide post 7b which is fitted to the guide cylinder 7a so as to be able to move up and down are arranged on these support carts 4R and 4L, respectively, and arc-shaped between the upper ends of the slide posts 7b and 7b. The holding frame 8 is stretched over the holding frame 8 by the telescopic cylinders 9R and 9L via the telescopic columns 7R and 7L, and is applied to the inner surface of the segment 6.

[0003]

FIGS. 4 and 5 show an embodiment of the present invention.
As shown in FIG.
The rear part 1 is disposed on the axis O1 of the segment assembling apparatus, or is disposed on the axis O2 of the rear bogie 12. By the way, when the sharp curve construction is performed, a deviation toward the curved outer periphery side occurs between the center of the perfect circle holding device 1 on the axis O1 of the shield machine or the axis O2 of the rear bogie 12 and the shield axis O. δ occurs.

Therefore, in the above-mentioned conventional configuration, as shown in FIG. 3, when the true holding device 1 is displaced from the segment 6, even if the holding frame 8 is pushed up with respect to the tunnel segment 6, the holding frame 8 does not match the inner surface of the segment 6 and the segment 6 cannot be held properly.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problem and to provide a segment circularity holding device which can appropriately hold a segment of a tunnel with a sharp curve.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is to dispose an apparatus main body having a front moving frame and a rear moving frame independently between a shield machine and a rear bogie. The front moving frame and the rear moving frame are provided with an upper support frame and a lower support frame which are respectively retracted and retracted by the holding telescopic device in a plane orthogonal to the shield axis, and which can be applied to the inner surface of the segment. Self-propelled propulsion means for advancing along the shield axis is provided.

[0007] According to the above configuration, since the apparatus main body is disposed independently of the shield excavator and the rear bogie, the shield excavator and the rear bogie bend along the tunnel axis in a sharply constructed tunnel. Even if there is, the apparatus main body is not affected. Therefore, even in a tunnel with a sharp curve, the front and rear moving frames can be positioned on an appropriate shield axis by applying the upper support frame and the lower support frame to the inner surface of the segment, and the segment can be positioned by the upper and lower holding frames. Can be properly maintained.

According to a second aspect of the present invention, in the above construction, the propulsion means comprises a plurality of propulsion expansion / contraction devices capable of freely moving the front moving frame and the rear moving frame toward and away from each other in the shield axial direction. The propulsion telescopic device alternately advances the front moving frame or the rear moving frame in a state in which the upper and lower supporting frames are retracted by contracting the telescopic device for self-running.

According to the above construction, the upper support frame and the lower support frame can be retracted, and the front and rear moving frames can be extended and contracted by the propulsion expansion / contraction device so as to move forward in the shape of a worm. The vehicle can travel independently without being affected by the bogie, and the front moving frame and the rear moving frame can always be arranged at optimal positions.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a segment perfection holding device according to the present invention will be described with reference to FIGS.

This roundness holding device is a shield machine 11
It is arranged independently between the rear segment assembling device and the rear bogie behind it, and is equipped with self-propelled propulsion means.

That is, the device body 20 of the perfect circle holding device
Is a front moving frame 23 formed by a pair of left and right front vertical columns 21 and 21 and a front horizontal beam 22 connecting the front vertical columns 21 and 21; a pair of right and left rear vertical columns 24 and 24; A rear moving frame 26 composed of a horizontal beam 25 connecting the columns 24, 24.
A pair of right and left propulsion guide devices 27 connected between both ends of the front and rear horizontal beams 22 and 25 to connect the front moving frame 23 and the rear moving frame 26 so as to approach and separate from each other along the shield axis O. It consists of.

The front and rear vertical columns 21 and 24 have built-in holding telescopic devices 28. Therefore, the holding telescopic devices 28 are fitted to the upper and lower portions of the vertical columns 21 and 24 so as to be able to move back and forth. Between the output cylinders 28a and 28b, which can be extended and retracted (a hydraulic cylinder may be used) 28c
Are connected, and the left and right output cylinders 28a and 2
Arc-shaped upper and lower segment support frames 29A and 29B are connected between 8a, 28b and 28b, and extend and contract the holding jack 28c to vertically move the upper and lower segment support frames 29A and 29B via the output cylinders 28a and 28b. Each can leave.

The propulsion guide device 27 comprises a slide cylinder 27a attached to the front horizontal beam 22, and a guide rod 27b attached to the rear horizontal beam 25 and slidably fitted to the slide cylinder 27a. Have been. The slide cylinder 27a and the guide rod 27b are
Each is connected to the front and rear horizontal beams 22 and 25 to be able to swing right and left within a predetermined small range.

Propelling jacks (hydraulic cylinders) 31R and 31L, which are telescopic devices for propulsion, are connected to the upper and lower portions of the front and rear vertical columns 21 and 24 along the shield axis O via vertical pins, respectively. By slightly changing the amount of expansion and contraction of the left and right propulsion jacks 31R and 31L, the front and rear segment support frames 29A and 29B which are parallel to each other can be slightly angled, and a sharp curve is constructed. The segment 6 can be easily handled. And these propulsion jacks 31
R, 31L and upper and lower segment support frames 29A, 29
A self-propelled propulsion unit is configured by the holding telescopic device 28 that moves out of B.

In the above configuration, the front and rear vertical columns 21,
24 is extended and the upper and lower segment supporting frames 29A and 29B are applied to the inner surface of the segment 6, so that the segment 6 immediately after being assembled by the segment assembling device at the rear of the shield machine 11 is a perfect circle. Is held. Also, if necessary, the left and right propulsion jacks 31R, 31L are slightly different in the amount of expansion and contraction so that the front and rear segment support frames 29A, 29B are slightly angled, so that the sharply curved segment 6 can be more easily formed. It can be held properly.

When the tunnel 6 is dug and the assembly of the segment 6 proceeds, the holding jack 28c of the rear vertical column 24 is contracted from the imaginary line position in FIG. 1 and the upper and lower segment support frames 29A and 29B at the rear are retracted. It is separated from the inner surface of the segment 6. Next, the propulsion jack 31
By contracting the R and 31L, the moving frame 26 is thereafter pulled forward, and assumes the posture shown by the solid line in FIG. Furthermore, a jack 28c for holding the rear vertical column 24
Is extended to support the upper and lower segment support frames 29A, 29
B is applied to the inner surface of the segment 6.

Next, the holding jack 28c of the front vertical column 21 is contracted and the upper and lower segment supporting frames 29
A and 29B are retracted and separated from the inner surface of the segment 6. Next, as the propulsion jacks 31R and 31L are extended, the front moving frame 23 is pushed forward, and the holding jack 28c of the front vertical column 21 is extended and the upper and lower segment supporting frames 29A and 29B are extended.
Is applied to the inner surface of the segment 6. This allows
The roundness holding device is moved forward.

According to the above embodiment, the roundness holding device is arranged independently of the shield machine 11 and the rear bogie, and the front upper and lower segment support frames 29 are provided.
A, 29B is applied to the inner surface of the segment 6 so that the apparatus main body 20 is always disposed at an appropriate position, and the upper and lower segment support frames 29A, 29B are applied to the inner surface of the segment 6 in an appropriate posture to attach the segment 6 to the inner surface. It can be held well. Therefore, even if the tunnel has a sharp curve, the upper and lower segment support frames 2
The segments 6 can be properly held by 9A and 29B. If necessary, left and right propulsion jacks 3
By making the amounts of expansion and contraction of the 1R and 31L slightly different to give the front and rear segment support frames 29A and 29B a slight angle, it is possible to more appropriately hold the tunnel segment 6 on which the sharply curved construction is performed.

[0020]

As described above, according to the present invention, since the apparatus body is disposed independently of the shield machine and the rear bogie, the shield machine and the rear bogie can be tunneled in a tunnel with a sharp curve. Even if it bends along the axis, the device body is not affected. Therefore, even in a tunnel with a sharp curve, the front and rear moving frames can be positioned on an appropriate shield axis by applying the upper support frame and the lower support frame to the inner surface of the segment, and the segment can be positioned by the upper and lower holding frames. Can be properly maintained.

According to the second aspect of the present invention, the upper support frame and the lower support frame can be retracted, and the front and rear moving frames can be extended and retracted by the propulsion telescopic device so as to move forward in the shape of a worm. The vehicle can travel independently without being affected by the shield excavator and the rear bogie, and the front moving frame and the rear moving frame can always be arranged at optimal positions.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing an embodiment of a segment perfection holding device according to the present invention.

FIG. 2 is a front view of the perfect circle holding device.

FIG. 3 is a front view showing a conventional perfect circle holding device.

FIG. 4 is a plan view illustrating a state in which a perfect circle holding device provided in a conventional shield machine is constructed at a sharp curve.

FIG. 5 is a plan view illustrating a state in which a perfect circle holding device provided on a conventional rear bogie is constructed with a sharp curve.

[Explanation of symbols]

 6 segment 11 shield excavator 20 main body 21,24 vertical column 22,25 horizontal beam 23,26 moving frame 27 propulsion guide device 28 holding telescopic device 29A, 29B segment support frame 31R, 31L propulsive telescopic jack

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Yuichi Nakamura 1-7-89 Minami Kohoku, Suminoe-ku, Osaka City, Osaka Prefecture F-term in Hitachi Zosen Corporation (reference) 2D055 BA01 LA11

Claims (2)

[Claims] An apparatus body having a front moving frame and a rear moving frame is independently disposed between a shield excavator and a rear bogie, and the front moving frame and the rear moving frame are orthogonal to the shield axis. A self-propelled propulsion means is provided with an upper support frame and a lower support frame which are respectively moved in and out of the plane by the holding telescopic device and can be applied to the inner surface of the segment, and advance the device body along the shield axis. A perfect circle holding device for a segment, which is provided. 2. The propulsion means comprises a plurality of propulsion telescopic devices capable of moving the front moving frame and the rear moving frame toward and away from each other in the axial direction of the shield. 2. The device for maintaining a perfect circle of a segment according to claim 1, wherein the front moving frame and the rear moving frame are alternately advanced by the propulsion telescopic device in a state where the lower support frame and the lower support frame are retracted. .