JP2661833B2 - Erector for rectangular section tunnel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an erector apparatus for assembling segments along a tunnel inner surface in a tunnel having a rectangular cross section excavated by a rectangular section shield excavator.

[0002]

2. Description of the Related Art In a conventional shield excavator for excavating a circular tunnel, an erector device (segment assembling device) provided at a rear portion of a shield main body has a circular guide rail centered on a shield axis at a rear portion of the shield main body. And an erector frame movable along this guide rail, or an erector frame provided on a circular rail movably guided in the circumferential direction, and a segment supporting member capable of holding a segment is provided on the erector frame. Some are provided so that they can move back and forth in the radial direction.

[0003]

In the conventional shield method, it is common to excavate a tunnel having a circular cross section.
2. Description of the Related Art In recent years, many shield excavators for excavating a cocoon-shaped or rectangular-shaped tunnel have been proposed in order to excavate an efficient tunnel according to a purpose of use.

[0004] When an erector device for a circular shield machine is applied to a shield machine for excavating a tunnel with a rectangular cross section, the diameter of a guide rail corresponds to the shorter side of the tunnel cross section. Therefore, the elongation stroke on the long side is required to be large, and the mechanism for increasing the evacuation stroke further increases the size of the erector device, making the space at the rear of the shield main body accommodating the earth removal device extremely large. It will be narrower.
In addition, complicated operations are required for assembling the corner segments.

The present invention solves the above-mentioned problems, and provides an erector device for a rectangular cross-section tunnel in which a rectangular cross-section segment can be assembled with a small stroke and simple operation, and the space at the rear of the shield body can be effectively used. The purpose is to do.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an erector device for a tunnel with a rectangular cross section according to the present invention is provided with a circular section having a shape similar to the cross section of the shield main body at a rear portion of the shield body of the shield excavator having a rectangular cross section. An arc-shaped rectangular guide rail is provided on the shield axis in a plane orthogonal to the shield axis, and a movable erector frame guided by the rectangular guide rail is provided. A traveling frame that is rotatably connected to the frame via a connecting rod and that can be driven to travel along the rectangular guide rail is provided, and the erector frame is movable in a shield axial direction and is normal to the rectangular guide rail. And a holding frame movable in a tangential direction, and a segment holding device provided on the holding frame. A.

[0007]

According to the above construction, since the erector frame moves along the rectangular guide rails, the movement stroke of the support frame at the time of segment assembly can be made substantially constant at any position, and the space in the shield body can be reduced. It can be used effectively, and the structure and control of the erector device can be simplified. In addition, since the erector frame is configured to be moved via the connecting rod by the running frames arranged on the left and right sides of the erector frame, the erector frame is moved smoothly by effectively transmitting the driving force irrespective of the straight portion or the curved portion. Can be
The movement of the erector frame does not become unstable particularly at the corners of the rectangular guide rail.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the erector apparatus according to the present invention will be described below with reference to FIGS.

In FIG. 1, reference numeral 1 denotes a rectangular segment ring assembled by an erector device 3 in a shield body 2 having a rectangular cross section, which is assembled by a plurality of segments 4.

In the erector device 3, a rectangular guide rail 5 having substantially the same shape as the shield main body 2 (tunnel) and four corner corners 5a formed in an arc shape is provided in a rear portion of the shield main body 2 with a mounting member 6 ( It is disposed on the shield axis O via a plane perpendicular to the shield axis O via FIG. 2). An erector frame 7 is movably disposed on the rectangular guide rail 5, and a traveling frame 8 is disposed on each of the left and right sides of the erector frame 7. Reference numeral 9 denotes a discharge device of the shield machine.

As shown in FIG. 2, the erector frame 7 is provided with two outer guide rollers 11A abutting on the outer peripheral surface of the rectangular guide rail 5 at positions on both left and right sides at least separated from the length of the corner portion 5a. A guide roller 11B abutting on the inner peripheral surface at a symmetrical position of the intermediate portion of the outer guide roller 11A is rotatably supported by a roller support plate 12, and these two sets of roller support plates 12 project in parallel with the shield axis O. The supported shaft 13 is rotatably supported by a bearing 14 of the erector frame body 7a, and is configured to smoothly move along the corner portion 5a and the linear portion 5b of the rectangular guide rail 5. Note that these guide rollers 11A and 11B are rectangular guide rails 5.
The gap is set in the linear portion 5b, and a gap is formed between the guide rollers 11A and 11B in the arc-shaped corner portion 5a. Therefore, the width of the rectangular guide rail 5 of the corner portion 5a is made large so that no gap is formed. doing.

As shown in FIG. 3, the running frame 8 has two rectangular outer guide rollers 15A abutting on the outer peripheral surface of the rectangular guide rail 5 on the running frame main body 8a, and a rectangular shape at an intermediate symmetrical position between the outer guide rollers 15A. Guide rail 5
An inner guide roller 15B abutting on the inner peripheral surface of the drive frame 16 is movably supported by being provided in the same manner as the roller support plate 12, and the output shaft of the travel drive motor 16 provided on the travel frame body 8a is connected to the inner guide roller 15B. A running sprocket 17 is attached to the tip end portion through the axial center position, and the running sprocket 17 is engaged with a chain rack 18 disposed along the rectangular guide rail 5. The traveling frame 8 and the erector frame 7 are rotatably pin-connected to each other via a connecting rod 19, and the erector frame 7 can be driven to travel along the rectangular guide rail 5 by the two traveling frames 8. .

The erector frame 7 has a slide frame 21 slidable in the front-rear direction, and a push frame provided on the slide frame 21 via a push device 22 so as to be able to move back and forth in the normal direction of the rectangular guide rail 5. 2
A holding frame 25 having a segment holding device 24 slidably provided in the pushing frame 23 in a direction perpendicular to the extending / retracting direction (a tangential direction of the rectangular guide rail 5) in a plane orthogonal to the shield axis O. It has.

That is, the erector frame body 7
a, two slide shafts 31 are protrudingly provided at a predetermined interval in the direction of the shield axis O on the back side of the slide shaft 3a.
1, a slide bearing 32 of the slide frame 21 is slidably fitted. The output rods of the front and rear slide jacks 33 provided on both sides of the slide frame are connected to the erector frame body 7a, and the slide frame 21 can be moved in the shield axis O direction.

Between the slide frame 21 and the pushing frame 23, there are two pairs of front and rear link arms 34, 34 having an intermediate portion formed in an X-shape via a pin.
A push jack 35 for moving the base ends of the link arms 34, 34 toward and away from each other in the slide frame 21.
Is mounted. The pushing device 22 includes a slide frame 21 in which the base end of one link arm 34 is slidable in a tangential direction.
And the output rod of the pushing jack 35 is connected to the pushing frame 23. The tip end of one link arm 34 is slidably attached to the pushing frame 23 in the tangential direction. It can be translated in the normal direction.

The holding frame 25 is a pressing frame 23
Is supported movably in the tangential direction via a linear bearing 36, and the holding frame 25 and the left and right slide jacks 37 provided at the front of the pushing frame 23 are connected to move the holding frame 25 in the tangential direction. .
The segment holding device 24 has a conventionally known structure for holding the segment 4 by screwing a holding screw shaft into a screw hole provided in the segment 4.

In the above structure, when the segment 4 is mounted on the rectangular segment ring 1, the segment 4 carried in by the segment carrying conveyor device (not shown) is used.
Is held by the segment holding device 24, and the traveling frame 8 is moved in the predetermined direction by the traveling driving motor 16 to move the erector frame 7 along the rectangular guide rail 5, and is stopped at the predetermined position. Then, the slide frame 21 is moved to the front and rear target positions by the front and rear slide jacks 33, and the holding frame 25 is moved in the left and right directions or the up and down directions by the left and right slide jacks 37 to finely adjust the assembling position of the segments 4 and push in. The pushing frame 23 is moved outward by the jack 35 to fit the segment 4 to the mounting position.

FIG. 4 shows a second embodiment, in which the right and left slide mechanism comprises a pushing device 22 and a slide frame 21 of the first embodiment.
It is provided between. That is, slide frame 4
0 to the shield axis O via the linear bearing 41
In the plane perpendicular to
Is provided with a slidable support frame 42, and a pushing device 44 is provided on the support frame 42 via a support arm 43.
The fixed side frame 44a is provided. The pushing device 44 is a pantograph type having a pair of link arms 44b, and a pushing jack 45 is connected diagonally between the frames. A holding frame 46 having the segment holding device 24 is provided directly on the pushing device 44. Have been.

According to the above embodiment, the rectangular guide rail 5
Since the erector frame 7 is provided so that it can run freely, the distance from the erector frame 7 to the assembling position of the segments 4 becomes uniform, and the operation control during assembling of the segments 4 by making the strokes of the pushing devices 22, 44 constant. Can be simplified, and the mechanisms of the pushing devices 22, 44 can be simplified.
The guide roller 1 is located on the left and right sides of the erector frame 7 at least apart from the length of the corner portion 5a.
1A and 11B, and the guide rollers 1111A,
Since the roller support plate 12 of 11B is rotatably provided via the support shaft 13, only one of the left and right guide rollers 11A and 11B engages with the corner portion 5a even if the corner portion 5a has a small radius of curvature. The other is in the linear portion 5b, which realizes smooth movement, and furthermore, the driving force to the erector frame 7 is applied from both the left and right sides by the traveling frame 8 connected via the connecting rod 19, so that the driving force is transmitted reliably. Thus, the corner portion 5a and the straight portion 5b of the rectangular guide rail 5 can be moved stably.

[0020]

As described above, according to the erector device for a rectangular section tunnel of the present invention, since the erector frame moves along the rectangular guide rail, the moving stroke of the support frame during segment assembly can be reduced at any position. It can be made substantially constant, the space in the shield main body can be effectively used, and the structure and control of the erector device can be simplified. Moreover,
Since the erector frame is configured to move via the connecting rod by the running frames arranged on both the left and right sides, the erector frame can be moved smoothly by effectively transmitting the driving force regardless of the linear part or the curvature. Therefore, the movement of the erector frame does not become unstable particularly at the corners of the rectangular guide rail.

[Brief description of the drawings]

FIG. 1 is a rear view showing a first embodiment of an erector device according to the present invention.

FIG. 2 is a sectional view taken along line AA shown in FIG.

FIG. 3 is a sectional view taken along line BB shown in FIG.

FIG. 4 is a central longitudinal sectional view showing a second embodiment.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 rectangular segment ring 2 shield body 3 erector device 4 segment 5 rectangular guide rail 5 a corner 7 erector frame 8 traveling frame 11 guide roller 12 roller support plate 13 support shaft 15A, 15B guide roller 16 traveling drive motor 17 traveling sprocket 18 chain rack 19 Connecting rod 21,40 Slide frame 22,44 Pushing device 23 Pushing frame 24 Segment holding device 25,46 Holding frame

Claims (1)

(57) [Claims] 1. A rectangular guide rail having a shape similar to the cross section of a shield body and having a corner portion formed in an arc shape is provided on a rear portion of the shield main body of the shield machine having a rectangular cross section on a shield axis in a plane orthogonal to the shield axis. Providing a movable erector frame guided by the rectangular guide rail,
On the left and right sides of the erector frame, a traveling frame is provided that is rotatably connected to the erector frame via a connecting rod and that can be driven to travel along the rectangular guide rail, and the erector frame is movable in the shield axis direction. An erector device for a tunnel having a rectangular cross section, wherein a holding frame movable in a normal direction and a tangential direction of a rectangular guide rail is provided, and a segment holding device is provided on the holding frame.