JP2645967B2 - Segment assembly equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a segment assembling apparatus for tunnel excavation by a shield method.

[0002]

2. Description of the Related Art Conventionally, in assembling segments in shield tunnel construction, a segment to be assembled is supported by an erector, turned to move to an assembling position, and connection bolt holes provided in segments joined to each other are formed. Aligned, inserted into connecting bolts, and fastened.

[0003] Positioning of the segments at the time of assembling the segments is conventionally automatically performed using a non-contact type sensor such as a television camera, an optical sensor, or an ultrasonic sensor.

[0004]

In the conventional apparatus as described above, a fine adjustment time for the final positioning is required, and the working environment is poor, so that it is difficult to maintain a high accuracy by the fine adjustment using the sensor. However, since a large number of sensors are used, there is a problem in that maintenance for maintaining proper operation requires much trouble.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has as its object to provide a segment assembling apparatus capable of appropriately performing final positioning at the time of joining in segment assembling in a short time.

[0006]

SUMMARY OF THE INVENTION The features of the present invention for solving the conventional problems as described above and achieving the initial object are as follows.
The erector that holds the segment and moves it to the assembling position includes a plurality of segment support arms whose tips are inserted into recesses communicating with the connection bolt holes in the joint end surfaces of the segments. A segment engaging pin having a tapered tip inserted into the connecting bolt hole, and pin driving means for moving the pin in and out; the segment engaging pin is protruded to hold the segment; There is a segment assembling apparatus in which an engagement pin is inserted into a connection bolt hole of an existing segment.

[0007]

According to the segment assembling apparatus of the present invention, the segment to be fed into the tunnel is inserted into the recess for the connecting bolt on the inner peripheral surface thereof by inserting the tip of the segment support arm and slightly pushing out the segment engaging pin. The tip is inserted into the connection bolt hole to prevent the segment support arm from falling off. Next, the erector is operated to move the segment to the assembling position and approach the existing segment in a rough positioning state. Then, the segment engaging pin is swung while being pressed against the joint surface of the other segment. As a result, the tip of the pin falls into the connecting bolt hole of the other party, the segment engaging pin is pushed out, and the connecting bolt holes are aligned using the taper of the tip as a guide.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

FIG. 3 schematically shows a segment assembling portion of the shield machine, in which 10 is a skin plate of the shield machine, and 11 is a segment 1 of the shield machine.
This is an erector for assembling 2.

As shown in FIGS. 1 and 4, two connecting bolt holes 13 are provided in each of the two joining surfaces 12a and 12b in the width direction, and three connecting bolt holes 13 are provided in each of the joining surfaces 12b and 12b in the axial direction. Each of the connection bolt holes 13 communicates with each of the recesses 14 formed on the inner surface of the segment.

The erector 11 has a horizontal moving part 16 protruding horizontally from the turning part 15 and a radial moving part 1 supported by the horizontal moving part 16 and operating in a direction substantially orthogonal to the horizontal moving part 16.
The segment holding unit 20 is supported by the radial moving unit 17.

As shown in FIGS. 1 and 2, the segment holding section 20 has four segment supporting arms 22, 22,... The tip of each of the segment support arms 22, 22... Is inserted into a total of four of the two recessed portions 14 provided along the joint surfaces 12b on the axial direction of the segment 12 described above. , And each of the support arms 22, 22,... Is integrally protruded from one frame body 23. The frame 23 is supported by a support shaft 24 so as to be swingable with respect to the support base 21, and is always elastically pressed against the support base 21 by a coil spring 25.

At the tip of each support arm 22, each recess 14
, The segment engaging pin 30 is supported so that the tip faces the connecting bolt hole 13 side. The pin 30 is connected to the hydraulic jack 3 supported by the support arm 22.
As shown in FIG. 5, it comprises a cylindrical body portion 30a and a tapered tapered portion 30b at the tip end thereof. This trunk 3
0a is formed to have substantially the same diameter as the connecting bolt hole 13, so that the fitting can be performed without leaving a large gap.

The segment holding parts 20 are provided with segment pressing members 32, 3 in four directions arranged on respective sides of the rectangular shape at positions surrounded by the segment supporting arms 22, 22,...
2 ... are provided. Each of the pressing members 32 is moved in and out with a hydraulic jack 33.

Next, the operation of the segment assembling apparatus thus configured will be described.

The segment holding portion 20 is made to approach the segment 12 carried into the tunnel, and the tip of each segment support arm 22 is inserted into the concave portion 14 on the inner peripheral surface of the segment with the pin 30 retracted. . After insertion,
The pin 30 is slightly pushed out and inserted into the connection bolt hole 13 of the segment 12 as shown in FIGS. In this state, each pressing tool 32, 32,.
2 is pressed.

The erector is operated while holding the segment 12 in this manner, and is moved to a position near a predetermined joining position while detecting the position with a conventionally used non-contact type sensor. Then, after approaching the approximate joining position, each pressing tool 32, 32,.
The segment engaging pin 30 is pushed out while changing the posture of No. 2, and the tip is brought into contact with the joint surface of the other segment as shown in FIG. This extrusion is performed while vibrating in the axial direction. In this manner, by bringing the segment 12 close to the joining position while swinging, the tip of the segment engaging pin 30 is inserted into the connection bolt hole 13 of the other segment as shown in FIG. )
As shown in (2), it is guided by the taper of the tapered portion 30b and aligned at a predetermined position.

[0018]

The segment assembling apparatus of the present invention has the following effects.

Since the final positioning of the segment is performed by the tapered portion of the segment engaging pin,
There is no need for a positioning step based on a very low speed operation as in the case of using a conventional non-contact type sensor, so that the assembling time of each segment is remarkably shortened, and moreover, mechanically reliable positioning is performed.

Since no optical or electrical sensor for fine adjustment is required, maintenance of the sensor and the like can be reduced even in a tunnel where environmental conditions are poor.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a main part of a segment assembling apparatus of the present invention.

FIG. 2 is a longitudinal sectional view of the same.

FIG. 3 is a longitudinal sectional view showing an outline of the entire segment assembling apparatus of the present invention.

FIG. 4 is a plan view showing a joined state of segments assembled using the apparatus of the present invention.

5A to 5C are cross-sectional views showing a final positioning step.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Skin plate 11 Elector 12 Segment 12a, 12b Joining surface 13 Connecting bolt hole 14 Depression 16 Horizontal moving part 17 Radial moving part 20 Segment holding part 21 Support base 22 Support arm 23 Frame 24 Support shaft 25 Coil spring 30 Engagement Pin 30a Body 30b Taper 31, 33 Jack 32 Pressing tool

Claims (1)

(57) [Claims] An erector for holding and moving a segment to an assembly position includes a plurality of segment support arms each having a tip portion inserted into a concave portion communicating with a connection bolt hole in a joint end surface of the segment. At the end, a segment engaging pin having a tapered tip inserted into the connection bolt hole, and pin driving means for moving the pin in and out are provided.
Hold the segment and engage the segment in the assembly position.
A segment assembling apparatus in which a pin is inserted into a connection bolt hole of an existing segment.