JPH02274998A - Segment roundness measuring device for shield excavator - Google Patents

Abstract

PURPOSE:To improve assembly precision of a segment by providing distance sensors to measure a distance in the direction of diameter of the inner peripheral surface of the segment and a computing processing device to input signals from the sensors and compute roundness. CONSTITUTION:Guide cylinders 8 and 9 are secured through support arms 6 and 7 on both sides of an elector ring 1, and distance sensors 24 and 25 are mounted to the cylinders 8 and 9 in a manner to be positioned facing the inner peripheral surface of a shield body 2. The sensors 24 and 25 are positioned in the central position of the axis of the shield body 2 and in a center in the direction of width within the inner diameter of an annular segment 30. Detecting signals from the sensors 24 and 25 are transmitted toward the inner peripheral surface of the segment 30, and inputted to a computing device 27 through a transmission cable 26, and after the signals are computed and processed, a measuring result is displayed and recorded on a display device 28. This constitution improves assembly precision through continuous and accurate measurement.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a device for measuring the roundness of assembled segments of a shield tunneling machine.

Conventional technology When a shield tunneling machine assembles and lays segments in a tunnel while digging, it is necessary to measure the assembly error of the segments and increase accuracy in order to ensure the assembly of the next segment. A measurement device is provided at the center of the tail portion of the shield tunneling machine body and immediately after assembly, and the roundness of the segment is measured by, for example, manually moving the contactor in the radial direction.

Problems to be Solved by the Invention Due to the above-mentioned measurements, measurement points are limited, measurement accuracy varies, and errors accumulate in the next segment assembly.
There is a risk of expansion, and the measurement work requires a long time.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a segment roundness measuring device for a shield tunneling machine that can solve the above problems.

Means for Solving the Problems In order to solve the above problems, the segment roundness measuring device of the present invention is provided in a segment erector device that is rotatably supported within a shield body, and measures the inside of the assembled segment. A distance sensor that measures distance in the radial direction of the circumferential surface,
It is composed of an arithmetic processing device that inputs the signal from this distance sensor and calculates the roundness after assembly.

Function: In the above structure, by rotating the erector device to an arbitrary position and inputting the signal from the distance sensor to the arithmetic processing device, the roundness of the segment after assembly is automatically measured accurately. be able to.

EXAMPLE Hereinafter, an example of the present invention will be explained based on FIGS. 1 to 4.

In Figs. 1 and 2, 1 is a lower erector ring rotatably supported via a guide roller 3 disposed on a ring girder within the shield main body 2, and a large gear 4 is provided on its outer periphery. The rotary drive device (through the pinion (51)
(not shown). Support arms 6. ,
L7. A guide cylinder 8I (9) is fixed to the guide cylinders 8 and 9, and guide rods 11 and 12 with an erector arm 10 fixed to their lower ends are held movably up and down. a vertical slide jack 1 for raising and lowering the erector arm 10 via brackets 13 and 14;
5 and 16 are attached, and one end of each of the rods 17 and 18 of these vertical slide jacks 15 and 16 is connected to a bracket 19 protruding from the erector arm 10.
, 20, and a segment gripper 22 connected to the front and rear slide jacks 21 is protruded from the outside of the central portion of the erector arm 10, forming an erector mount 23.

Further, in the guide tube 8.9, there are distance sensors 24 and 25 that receive and transmit distance measuring laser or ultrasonic waves so as to face the inner circumferential surface of the shield body 2, and as shown in FIG. It is attached via 27.

Further, as shown in FIG. 3, distance sensors 24 and 25
The measurement signal sent from the sensor is input to the arithmetic processing unit 27 via the transmission cable 26, where it is subjected to arithmetic processing and the results are displayed on the display device 28 or recorded.

In the above configuration, the segment 29 is held by the segment gripper 22 and the vertical slide jack 15
, 16, and then the erector ring 1 is rotated to move the segment 29 to a position close to assembly. Further, the front and rear slide jacks 21 are used to position the segment 29 in the front and back direction, and then the vertical slide jacks 15 and 16 are moved. The segment 29 is pushed out and installed at a predetermined position, and the segment 29 is separated from the erector device 23. While repeating the above operations, the segments 29 are assembled and laid in a ring shape.

After assembly, the roundness of the ring segment 30 is measured. That is, as shown in FIG.
is positioned at the axial center position and at the center in the width direction within the inner diameter of the ring-shaped segment 30, and transmits a detection signal from the distance sensor 24 to 25 to the inner peripheral surface of the ring-shaped segment 30, and transmits the reflected detection signal. The measurement result is inputted to the arithmetic device 27 via the cable 26, subjected to arithmetic processing, and then displayed or recorded on the display device 28.

Note that the distance sensors 24 and 25 measure distance A.
Between B (I!,) and between CD (12) are performed, and the results are sent to two preset distance sensors 24 and 25.
This is done by adding it to the mounting position distance #IBC(/,). That is, l! , +1! , ten/, are calculated.

Further, when continuously measuring the inner diameter of the ring-shaped segment 30, the erector device 23 is rotated, so that the distance sensors 24 and 25 move in the direction of the arrow E as shown in FIG. A deviation in the distance ma (which can be regarded as a straight-line distance) occurs. Therefore, in the calculation process, each distance sensor 24, 2
51ζ is corrected and the correct distance X'
is calculated.

xt=rf ■ X: Distance measured by each distance sensor By the way,
In the above embodiment, the circularity measurement of one ring-shaped segment 30 was explained, but as shown in FIG. By protruding the rods 31 and 32 and attaching another distance sensor 33, 34 to their tips, it is also possible to measure the roundness of the rear ring-shaped segment 35, which is adjacent and directly exposed to the ground. can do.

Effects of the Invention As described above, according to the configuration of the present invention, by providing the distance sensor in the erector device, the roundness of the assembled ring segment can be accurately determined at any position, in a stationary state, or continuously. Therefore, there is no variation in measurement, and the accuracy of segment assembly can be improved.

[Brief explanation of drawings]

Figures 1 to 4 show an embodiment of the segment roundness measuring device according to the present invention, in which Figure 1 is a side view, Figure 2 is a front view, and Figure 3 is a roundness measuring section. FIG. 4 is a front view for explaining the operation during continuous measurement, and FIG. 5 is a side view of another embodiment. 1...Erector ring, 2...Shield body, 6゜7...Support arm, 23...Erector device, 24
, 25... distance sensor, 27... arithmetic processing unit, 28... display device, 29... segment, 30...
...Ring segment, 31°32...Connecting rod, 3
3, 34... Distance sensor, 35... Rear ring-shaped segment.

Claims (1)

[Claims] 1. A distance sensor is installed in the segment erector device that is rotatably supported within the shield body and measures the distance in the diametrical direction on the inner peripheral surface of the segment after assembly, and a signal from this distance sensor is input and the assembly is performed. 1. A segment roundness measuring device for a shield excavator, comprising a calculation processing device for calculating subsequent roundness.