JP2602594B2 - Tightening device for bolts and nuts for segment fastening - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tightening device for tightening bolts and nuts of a primary lining segment assembled in an excavated tunnel in a shield method.

[0002]

2. Description of the Related Art Conventionally, a segment assembled by an erector device at the rear of a shield machine is used as a reaction force receiver of a propulsion jack of the shield machine.
The bolts and nuts that fasten the segments are loosened due to compression of the sealing material or other vibrations, resulting in incomplete sealing between the segments. As a measure to ensure the water stopping performance of the segment, bolts and nuts were tightened manually using a hand-held nut runner behind the shield machine. However, an automatic bolt / nut tightening device has been proposed in Japanese Unexamined Patent Publication No. Hei 2-38699 because of its low work efficiency.

[0003]

However, in the above conventional tightening device, the tightening device main body is provided on a beam provided at the rear portion of the shield main body. Therefore, immediately after assembling the segments with the erector, the bolts and nuts for tightening must be tightened. After the tightening, loosening progresses due to vibration, etc., and it is necessary to retighten again at the rear. Was. In particular, the effect of looseness is greater in a large-diameter tunnel than in a small-diameter tunnel.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide a segment tightening bolt / nut tightening device capable of efficiently tightening a segment tightening bolt / nut.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a tightening device for a bolt and nut for segment fastening according to the present invention uses a bolt and nut to divide a segment piece divided in a tunnel circumferential direction and an axial direction. A tightening device for fastening bolts and nuts for a cylindrically assembled segment, comprising a plurality of support legs which are arranged so as to be able to approach and separate from each other along an axial direction, and which are capable of coming into contact with and separating from the inner surface of the segment. configure mobile at the front frame and the rear frame having a gas to one of the front frame and the rear frame
The guide part is provided integrally, and the other part is
Guided part guided and supported movably in the center direction
The front frame and the rear frame
A propulsion cylinder device to be interposed is provided, and a multi-joint arm whose tip is movable along the inner peripheral surface of the segment is provided on the movable body, and a bolt and nut for fastening a segment can be fastened to the tip of the multi-joint arm. A bolt / nut tightening machine having a bolt chucker and a nut runner is provided.

[0006]

According to the above construction, the moving body is provided separately from the shield machine, and the moving body is advanced by the extension and contraction of the legs provided on the front and rear frames, and the approach and separation of the front and rear frames. Because of this configuration, the effect of the propulsion reaction force and vibration of the shield machine can be reduced, so that the tightening work can be performed a predetermined distance behind the shield machine, and the tightening work can be performed more effectively. it can. In addition, since the bolt and nut tightening machine is provided at the tip of the articulated arm, it can be used for bolts and nuts for segment fastening mounted at all angles and mounting positions. The inter-piece bolts and nuts that fasten the segment pieces divided in the circumferential direction by the tightening machine in a ring shape and the inter-ring bolts and nuts that fasten the segment rings in a tubular shape can be increased and tightened, respectively, and the ability is high. . Further, the articulated arm can cope with segments having different inner diameters and segments of various shapes, and can be easily reused for other tunnel segments after the completion of the retightening work, and the versatility is high.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a tightening device for a bolt and nut for fastening a segment according to the present invention will be described below with reference to FIGS.

[0008] As shown in FIG.
It is composed of a plurality of segment pieces 2 divided in a circumferential direction, and the segment pieces 2 are fastened by a plurality of inter-piece bolts / nuts 3 to form a ring-shaped segment ring 4. The cylindrical segment 1 fastened by the bolts and nuts 5 and fitted in the tunnel is assembled.

As shown in FIG. 1 to FIG. 3, this segment tightening bolt / nut tightening device is a moving body 11 capable of repeatedly moving in and out of the segment 1 to advance like a worm.
A multi-joint arm 12 having a distal end movable along the inner peripheral surface of the segment 1, and a bolt capable of tightening the bolt-nut 3 between pieces and the bolt-nut 5 between rings at the distal end of the articulated arm 12. A bolt / nut tightener 15 having a chucker 13 and a nut runner 14 is provided.

First, the moving body 11 will be described. The moving body 11 includes a front frame 21 and a rear frame 22 which are movable toward and away from each other in the axial direction of the segment 1.
The front frame 21 and the rear frame 22 each formed in a cross-shape in front view are provided with four pairs of support cylinder devices 23 and 24 which can move up and down in the vertical and horizontal directions, respectively. , 24 are provided with segment pressing members 25, 26, respectively, to form support legs. By extending the support cylinder devices 23, 24, the segment pressing members 25, 26 are connected to the inner peripheral surface of the segment 1. To fix the front frame 21 and the rear frame 22 in the segment 1. The front frame 21 has a rear frame 2
A guide recess 27 that extends to the second side and is a guide portion in the front-rear direction.
A support frame 28 is formed on the front frame 21. A slide frame 29, which is a guided portion that is slidably fitted into the guide recess 27 of the support frame 28, is provided on the rear frame 22. And
A propulsion cylinder device 30 is provided between the front frame 21 and the rear frame 22 for moving the moving body 11 forward by moving the front frame 21 and the rear frame 22 closer to and away from each other.

Next, a pair of left and right articulated arms 12 and a bolt / nut tightener 15 provided on both side surfaces of the support frame 28 will be described. A pair of front and rear elevating rails 31 is disposed on a side surface of the support frame 28, and an elevating base 32 is arranged on the elevating rail 31 so as to be able to move up and down.
An elevating female screw member 35 provided on the elevating base 32 is screwed to an elevating ball screw shaft 34 that is disposed on the support frame 28 in parallel with the elevating rail 31 and connected to the elevating motor 33, The lifting base 32 can be moved up and down along the lifting rail 31 by rotating the lifting ball screw shaft 34 by the lifting motor 33.

On the elevating base 32, a pair of upper and lower forward / reverse rails 36 is disposed in the front / rear direction.
6, an arm base 37 for supporting the articulated arm 12 is movably supported. The arm base 3 is mounted on a forward / backward movement ball screw shaft 39 which is disposed on the elevating base 32 in parallel with the forward / backward moving rail 36 and to which a forward / backward moving motor 38 is connected.
7 is screwed with the forward / backward moving female screw member 40. The forward / backward moving motor 38 drives the forward / backward moving ball screw shaft 39 to rotate the arm base 37 along the forward / backward moving rail 36. To move it back and forth.

On the arm base 37, the first arm motor 41 is provided with imaginary lines a to b in the directions of arrows A and B around a first support shaft 42 parallel to the segment axis direction.
The first arm 43 rotatable in the range b is attached,
A second arm motor 44 is provided at the tip of the first arm 43.
Thus, the second arm 46 is attached, which is rotatable around the second support shaft 45 parallel to the first support shaft 42 in the directions of arrows C and D in the range of c to d indicated by the virtual line. Further, a third arm motor 4 is provided at the distal end of the second arm 46.
7, the arm bracket 4 is rotatable in the directions of arrows E and F around a third support shaft 48 parallel to the first support shaft 42.
9 is provided, and a bolt / nut tightener 15 that is rotatable in the directions of arrows G and H by a fourth arm motor 50 around a rotation axis orthogonal to the third support shaft 47 is provided on the arm bracket 49. I have.

The bolt chucker 13 and the nut runner 14 provided on the bolt / nut tightener 15 are attached to the tightener main body 51 so that they can be approached and separated from each other, and the distal end thereof is mounted with the bolt / nut of the segment piece 2. Work arms 52 and 53 which can be inserted into the recesses 6 for use, and chucks which can hold the heads of bolts and nuts at positions facing the distal ends of the work arms 52 and 53, and the nut runner 14 side is a tightening machine. The inter-piece bolts / nuts 3 and the inter-ring bolts / nuts 5 can be further tightened with a predetermined torque by being rotationally driven by a tightening motor 55 provided on the main body 51 side.

In the above construction, when the tunnel is excavated by the shield machine and the segment 1 is assembled by the erector at the rear part of the shield body with the bolt-nut 3 between pieces and the bolt-nut 5 between the rings, a predetermined distance of the shield machine is obtained. This bolt / nut tightening device is used at the rear, that is, at a position, for example, approximately 20 m behind where the influence of the propulsion reaction force or vibration of the shield machine is small and the bolts and nuts 3 and 5 for segment fastening are not easily loosened.

The moving body 11 includes a front and rear frame 2.
First, the support cylinder devices 23 of the front frame 21 are contracted from the state where the support cylinder devices 23 and 24 are extended and the segment pressing members 25 and 26 are pressed and fixed to the inner peripheral surface of the segment 1. To separate the segment pressing member 25 from the inner peripheral surface of the segment 1,
Next, the propulsion cylinder device 30 is advanced to slide the slide frame 29 along the guide recess 28, and the front frame 21 is advanced by a predetermined distance. Then, the support cylinder device 23 is extended and the segment pressing member 25 is pressed against the inner peripheral surface of the segment 1 to fix the front frame 21 to the segment 1. Next, the support cylinder device 24 of the rear frame 22 is contracted to separate the segment pressing member 26 from the inner peripheral surface of the segment 1, and the propulsion cylinder device 30 is further contracted to advance the rear frame 22. Then, the support cylinder device 24 is extended, and the segment pressing member 26 is pressed against the inner peripheral surface of the segment 1 to fix the rear frame 22 to the segment 1. In this manner, the moving body 11 is sequentially advanced, and the retightening operation is performed.

When the movable body 11 is stopped at a predetermined position, for example, the motor 33 is moved up and down to the upper limit by driving the motor 33 and the motor 38 is driven forward and backward to position the arm base 37. 1 and the first to fourth arm motors 41, 44, 47, and 50 are driven to rotate the first and second arms 43 and 46, respectively.
As shown by the imaginary line on the right side, the tightening work is started from the bolt / nut 5 between the top rings of the segment 1.

In this tightening operation, the bolt / nut tightening machine 15 is stopped facing the concave portion 6 for mounting the bolt / nut, and the working arms 52, 53 of the bolt chucker 13 and the nut runner 14 are moved in the radial direction of the segment 1. Then, the chucks at the tips are moved to face the bolts and nuts 5 between the rings. Then, the work arms 52 and 53 are brought close to each other, the heads of the bolts and the nuts are gripped by the respective chucks, and the chucks on the nut runner 14 side are rotationally driven by the tightening motor 55 and tightened with an appropriate torque. Then, the chucks are released and the working arms 52 and 53 are opened.
And move on to the next operation.

Next, in order to retighten the bolts and nuts 3 between the adjacent pieces, the main body 51 of the tightener may be turned by the fourth arm motor 50 by 90 degrees. Then, the work is performed by appropriately moving the elevating base 32 and the arm base 37,
One bolt / nut tightener 15 is moved from the top to the bottom, and the other bolt / nut tightener 15 is moved from the bottom to the top, so that the bolts and nuts 3, 3 Re-tighten 5.

Next, a second embodiment will be described with reference to FIG. The same members as in the first embodiment are denoted by the same reference numerals,
Description is omitted. This tightening device is provided with a ring rail 61 concentric with the segment 1 in place of the lifting rail,
The ring rail 61 is provided with a plurality of (two in the drawing) self-propelled revolving gantry 62, and the arm base 37 is provided on the revolving gantry 62. As a result, the operations of the arms 43 and 46 can be reduced and simplified as compared with the first embodiment, and the lengths of the arms 43 and 46 can be sufficiently reduced.

Next, a third embodiment will be described with reference to FIG. The same members as in the first embodiment are denoted by the same reference numerals,
Description is omitted. Instead of the rail for guiding the arm base, a rotating frame 71 that can be moved back and forth
8 are provided on the upper side and on both sides, and the rotating base 71 is provided with an arm base 37. The articulated arm 12 having the bolt / nut tightener 15 is provided.
By turning and rotating the rotary base 71 forward and backward, the retightening work range can be covered, and the work time can be shortened by the three bolt / nut tighteners 15.

[0022]

As described above, according to the present invention, a moving body is provided separately from the shield machine and the front part of the moving body is provided.
The extension and contraction of the legs provided on the frame and the rear frame, and the propulsion cylinder device causes the front frame and the rear
The frame is guided and supported by the guide section and the guided section.
The shield excavator is configured so that it can move forward and independently , so that the effect of propulsion reaction force and vibration of the shield excavator can be reduced. It is possible to perform the retightening work more effectively. In addition, since the bolt and nut tightening machine is provided via an articulated arm, segment fastening bolts and nuts mounted at all angles and mounting positions,
For example, bolts and nuts between pieces that connect segment pieces in a ring shape, and bolts and nuts between rings that connect ring-shaped segments and assemble into a cylindrical shape, and segments attached at different angles can be used. The present invention can easily cope with fastening bolts and nuts and fastening bolts and nuts of segments having deformed cross sections. Further, the articulated arm can cope with segments having different inner diameters and segments of various shapes, and can be easily reused for other tunnel segments after the completion of the retightening work, and the versatility is high.

[Brief description of the drawings]

FIG. 1 is a front sectional view showing a first embodiment of a segment tightening bolt / nut tightening device according to the present invention.

FIG. 2 is a side view of the tightening device.

FIG. 3 is an enlarged front view of the articulated arm of the tightening device.

FIG. 4 is a cutaway perspective view illustrating a segment.

FIG. 5 is a front sectional view showing a second embodiment of the tightening device for bolts and nuts for segment fastening.

FIG. 6 is a front sectional view showing a third embodiment of a tightening device for a segment fastening bolt / nut.

[Explanation of symbols]

 1 segment 2 segment piece 3 bolt and nut between pieces 4 segment ring 5 bolt and nut between rings 11 moving body 12 articulated arm 13 bolt chucker 14 nut runner 15 bolt and nut tightener 21 front frame 22 rear frame 22,23 Support cylinder device 25,26 Segment pressing member 27 Guide recess 28 Support frame 29 Slide frame 30 Propulsion cylinder device 32 Elevating base 34 Ball screw shaft for elevating 37 Arm base 43 First arm 46 Second arm 61 Ring rail 62 Rotating movement Stand 71 Rotating stand

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Akihiro Higashide 2-3 Kandajicho, Chiyoda-ku, Tokyo Obayashi Corporation Tokyo Head Office (72) Inventor Susumu Numura 5-3-1 Nishikujo, Konohana-ku, Osaka-shi, Osaka No. 28 Inside Hitachi Zosen Corporation (72) Inventor Taiji Hanaoka 5-28 Nishikujo, Konohana-ku, Osaka-shi, Osaka Inside Hitachi Zosen Corporation (56) References JP-A-2-171499 (JP, A) JP-A-1-118413 (JP, A) JP-A-2-38699 (JP, A)

Claims (1)

(57) [Claims] An apparatus for tightening a bolt and nut for fastening a segment piece, which is obtained by cylindrically assembling segment pieces divided into a tunnel circumferential direction and an axial direction by bolts and nuts, comprising: A moving body is constituted by a front frame and a rear frame which are arranged so as to be able to approach and separate from each other, and each have a plurality of support legs which can be abutted and separated on the inner side of the segment, and a guide is provided on one of the front frame and the rear frame Part one
On the other hand, and to the other side in the axial direction
A guided portion movably guided and supported is provided integrally, and the front frame and the rear frame are moved toward and away from each other.
A propulsion cylinder device is provided, and a multi-joint arm is provided on the movable body, the tip of which is movable along the inner peripheral surface of the segment. A bolt capable of tightening a segment fastening bolt / nut is provided at the tip of the multi-joint arm. A bolt and nut tightening device for segment fastening, comprising a bolt and nut tightening machine having a chucker and a nut runner.