JPH0288893A - Tunnel excavator - Google Patents

Abstract

PURPOSE:To exchange a tail seal easily by arranging an erector to a drum installed to a guide beam while mounting a moving mechanism capable of moving the whole erector in the axial direction of a tunnel excavator. CONSTITUTION:When a tail seal Ts is abraded, a moving jack 8 is extended, and a drum 5 is shifted backward. A segment gripper 17 is moved to a section just above an existing segment S', an expansion jack is stretched and a lifting beam 14 is shifted in the radial direction, and the segment S' is sucked and gripped by a sound-absorbing pad installed to a segment holding plate 19. The mutual clamping of the segments S' is released, the expansion jack is shortened, and the segments S' are lifted. Other segments S' are also removed similarly, and the worn tail seal Ts is exchanged. Erectors 6, 6A are operated again, and a segment ring is lined.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention provides an erector for constructing a segment ring in a tunnel excavated by a tunnel excavator (for example, a shield excavator). The present invention relates to a tunnel excavator configured to be movable in the axial direction of the excavator (hereinafter simply referred to as axial direction J).

[Prior Art] A tail seal is installed on the inner surface of the tail frame of a shield excavator, which is one type of tunnel excavator, in the axial direction in order to seal between the segment ring constructed by the erector (segment assembly device). (See Figure 2). This tail seal performs a sealing function to prevent water and dirt from entering the shield frame, and is always in sliding contact with the segment ring as the tunnel excavator excavates. As a result, during the excavation period, the tail seal may wear out and its sealing function deteriorates, or foreign matter may become trapped between the segment and tail sill, preventing the sealing function from sweating in that area, allowing water and dirt to enter the tunnel excavator. It may invade. Therefore, in such a case, it is necessary to remove the existing segment at the relevant location and replace the tail seal, or remove the foreign object to restore the sealing function.

However, conventional shield tunneling machines, for example, JP-A-60
In the shield tunneling machines disclosed in Publication No. 261897 (see Figures 6 and 7) and Japanese Utility Model Publication No. 61-11.356 (see Figure 8), the chill seal T on the device is
No special considerations have been made to facilitate the exchange of s.

[Problem to be solved by the invention]

That is, in the case of i1, in order to move the segment gripping device 38, which is one component of the erector 30, in the axial direction, the turning wheel 3 that turns around the inner circumferential wall of the shield frame 31 is used.
A support arm 33 is provided protruding from 2, and a hanging beam 34 is attached to this.
A groove-shaped balancer 36 and a sliding cylinder 35 are provided, which are slidably provided through a guide bar 37 inserted through the central portion of the balancer 36.However,
The amount of movement of the segment gripping device 38 stops at the groove range of the balancer (36 (approximately the length range of the guide bar 37)), and it is not possible to move the segment gripping device 38 to the point where it can grip the existing segment S'.Of course, the entire erector 30 cannot be moved.

On the other hand, in the latter case, a guide rod 45 is provided at the center of the lower end of the hanging beam 43 attached to a support arm 43 protruding from the swing ring 42, and a jack slides on this guide rod 45 (following the path shown in the figure). Segment gripping device 47 that can be slid by
A sliding frame 46 having a diameter is provided. In this configuration, the segment gripping device 47 can only move within the length range of the guide rod 45, and cannot be moved to a position where it can grip the existing segment S'. If an attempt is made to increase this amount of movement, the guide rod 45 must be lengthened, which increases the length of the lower end of the suspension beam 44, which is undesirable because the portion that can be turned (vJ) becomes too large. Even in this prior art, the entire erector 110 is not movable in the axial direction.

Therefore, when replacing the tail knoll Ts, for example, the turning wheel 32 (42) and the support arm 33 (43)
By inserting a spacer (as shown in the diagram) between the segment I and the gripping device 38 (47), the existing segment S
It is necessary to bring the spacer to a position where it can be grasped. However, the work of removing the spacer is extremely difficult and time-consuming because it is performed within the narrow spacer frame 31 (41).

Therefore, in view of the problems of the prior art, the present invention has been developed so that the entire erector for constructing the segment ring is movable in the axial direction of the tunnel excavation machine via a tram in order to facilitate the replacement of the tail seal. The purpose is to provide a ton λ, le excavation chamber.

[Means for Solving the Problem] In order to achieve the above object, a tunnel excavation machine according to the present invention has the following features:
A guide beam held on the tunnel excavating machine side is provided in the axial direction of the tunnel excavating machine, a drum is provided on the guide beam, an erector is disposed on the drum, and the entire erector together with the tram is used for the tunnel excavation. The machine is characterized by being equipped with a mechanism that allows it to move in the axial direction of the machine.

Furthermore, a guide beam having one end fixed to the tunnel excavating machine side is provided in the axial direction of the tunnel excavating machine, and a drum supported by the guide beam via a guide arm is provided,
An erector is installed in front of and/or behind this drum, and a J jack is connected between the drum and the guide beam to move the entire erector together with the ram into the tunnel excavation. [Function] In the above configuration, when the moving mechanism moves the drum in the axial direction of the tunnel excavating machine, the entire erector installed on the tram also moves in the axial direction. to B'P)J.

Furthermore, as an aspect, by the expansion and contraction of the moving jack,
The drum moves along the guide beam in the axial direction of the tunnel excavator while being supported by the guide beam, and as a result, the entire erector (single erector) installed at the front or rear of the drum, or the entire erector (single erector) installed at the front or rear of the drum. The entire erector (double erector) also moves in the axial direction. This amount of movement can be appropriately set as required. For example, it is possible to make the tail seal replacement work easier by providing a movement amount greater than the (segment) ring width.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

1 to 3 are diagrams in which the present invention is applied to a double erector, and FIG. 5 is a diagram in which the present invention is applied to a single erector.

That is, FIG. 1 is a perspective view of the entire double erector, FIG. 2 is a side sectional view of the tunnel excavator equipped with the double erector, and FIG. 3 is a rear view thereof.

FIG. 5 is a side sectional view of a tunnel boring machine equipped with a single erector.

In FIGS. 1 to 3, a support ring 2 is provided inside a shield frame l of a tunnel excavating machine along its inner circumferential wall, which also serves to reinforce the shield frame l. A pair of left and right columns 3.3 are provided on the inner circumferential wall of the support ring 2, and a cantilevered guide beam 4.4, one end of which is fixed to each column 3.3, extends approximately horizontally in the tunnel axis direction. This is an extension. Each guide beam 4.4 has a box-shaped cross section, and guide grooves 4a', 4a are cut in the axial direction on the upper and lower surfaces thereof.

A ring-shaped drum 5 supported by the guide beam 4.4 is provided concentrically with the shield frame 1. That is, a pair of upper and lower guide arms 5a and 5b having convex portions that engage with the guide grooves 4a and 4a of the guide beam 4.4 are attached to both left and right sides and front and rear of the drum 5. These guide beams 5a, 5b are provided on the inner peripheral wall of the drum 5, and are integrated with a mounting bracket for a drive motor 9.9A, which will be described later. The guide arms before and after the drum 5 may be integrated. In this way, the guide beam 4.
The guide arms 5a, 5
By providing b, the rotational reaction force of the turning wheel 7.7A, which will be described later, is supported.

Between the lower guide arms 5b, 5b and the guide beam 4.4, there is a movable jack 8.8 that allows the drum 5 to move freely in the tunnel axis direction along the guide beam 4.4. .4. Therefore, in the above case, the movement mechanism for the drum 5 is constituted by the guide arms 5a and 5b that slide on the guide beam 4 and the movement jack 8.

In the above embodiment, the guide arms 5a, 5b are fixedly installed on the drum 5 side, but the left and right guide arms 5a, 5b are provided to protrude rearward from the support column 3.3 side, and the guide beam 4.4 is attached to the drum 5 side. It may be provided integrally on the side. In this case, the drum 5 is integrated with the guide beam 4.4,
Since it is configured to be movable in the axial direction, there is no need for the guide beam 4.4 to protrude behind the drum 5 as in the above embodiment.

A tail seal Ts is attached to the tail frame 1A of the shield frame 1 of the tunnel excavator, and the tail seal Ts comes into contact with the existing segment S' to seal it from water, dirt, etc.

The drum 5 has two erectors (double erector).
) 6A, 6 are equipped. In the figure, front erector-6
Those corresponding to A are indicated by adding the suffix "A" to the reference numeral.

Front erector 6A symmetrically provided before and after the drum 5
, and the rear erector 6 each have a turning wheel 7A.

7, Support arm IIA, 11, Hanging beam 14A,
14, segment gripping devices 17A, 17, etc.

Hereinafter, for convenience, the configuration of the rear erector 6 will be described in detail, but the configuration of the front erector 6A is also the same except as specified.

A turning ring 7 provided at the rear end of the drum 5 is rotatably supported by the drum 5 via a bearing 10.

The drive motors 9 serving as the rotation means are provided at four locations for each erector. Although not shown, the swing wheel 7 is driven by a rack and pinion system as in the conventional case.

A pair of left and right support arms 11.
11 is formed to protrude in the radial direction, and an arch-shaped suspension beam 14 is installed on the outer peripheral surface of the swing ring 7 between the tops of both support arms 11.11. Telescopic rods 12 (FIG. 3) are protruded from both ends of the suspension beam 14, and are slidably fitted into the support arm 11. That is, a telescoping jack 13 is provided between the suspension beam 14 and the support arm 11, and as the telescoping jack 13 expands and contracts, the suspension beam 14 is moved in the radial direction while the telescoping rod 12 is guided by the support arm 11. It has become.

A pair of sliding rods 15, 15 are provided on the suspension beam 14, overhanging the outer peripheral surface of the tram 5 and protruding toward the front of the tunnel. On the other hand, the hanging beam 14A to the front erector 6 also has a pair of sliding irons 15A,
15A protrudes above the drum 5 and at the rear of the tunnel, so the sliding rods 15A, 15A of the front erector 6A
and rear erector 6 sliding rond 15.15.
As shown in FIG. 3, they are arranged to rotate in the same rotation range on the circumferential surface of the drum 5 while facing each other.

Therefore, when performing segment assembly work using both erectors 6 and 6A at the same time, an interference prevention device is formed by a proximity switch and a striker (not shown) to prevent the segments gripped by the segment gripping device from colliding with each other. They are mounted on the mount of cable/hose reel 25.25A (FIG. 3).

The sliding lot 15.15 has a segment gripping device 1.
A sliding member 18 provided with 7 is slidably fitted.

That is, a sliding jack 16.16 is provided between the hanging beam 14 and the sliding member 18, and the sliding member 18, that is, the segment gripping device 17, is moved along the sliding opening and the door by the expansion and contraction thereof. It can be moved in the direction of the spear axis. Further, the segment gripping device 17 has a sliding member 18
Spherical bearing 1 is used to facilitate posture control of segment s.
8a.

FIG. 4 is a perspective view of essential parts of this segment gripping device 17. On the back (inside) side of the segment holding plate 19 for gripping the segment S, there are a positioning jack 20 that is operated to control the posture of the segment when assembling the segment, a low grip jack 21, a jack 22 for the key segment, and a segment. Bins 23 and the like are installed to prevent skidding. Although not particularly shown, the segments S are gripped by suction with a suction band provided on the outer surface of the segment holding plate 19.

In addition, in FIG. 2, 24 is a wheel for making the tunnel excavator dig.

FIG. 5 shows a case where the present invention is applied to a tunnel boring machine equipped with a single erector. As shown in the figure, the basic configuration is the same as that of the double erector, so
Components having the same configuration are indicated by the same reference numerals, and detailed description thereof will be omitted. In this embodiment, the erector 6 is attached only to the front of the drum 5.
The configuration of the means for moving the tram 5 in the axial direction of the tunnel excavator and the fact that the tail seal Ts is attached to the tail frame IA of the tunnel excavator are the same as in the case of the double erector. It is. Also in this example,
By expanding and contracting the movable oak tree 8, the drum 5 is moved to the guide beam 4.
By moving axially along
The whole can be moved in the axial direction.

In addition, since it is a single erector, the length of the drum 5 and the length of the guide beam 4 are formed to be correspondingly shorter.

Furthermore, instead of providing the erector 6 at the front of the drum 5, an erector may be provided at the rear.

Due to the axial movement function of the entire erector in the above embodiment, the tail seal Ts can be replaced easily and quickly. That is, when the tail seal Ts is worn out and the sealing function is deteriorated, the movable cylinder 8 is extended to move the drum 5 rearward, and the segment gripping device 17 (17A) is held directly above the existing segment l-5'. Then, the telescopic jaggery 13 (13A) is extended to move the suspension beam 14 (14A) in the radial direction, and the existing segment S' is suctioned and held by the suction pad provided on the segment holding plate 19 (19A). After the existing segment assembly work is released, the telescopic jack 13 (13A) is operated (shortened) again to lift and remove the existing segment S'. After removing the other existing segments S' in the same manner, the worn tail seal Ts is replaced. After this, Erecta-6 again (
6A) to line the segment ring.

Furthermore, the entire erector movement function can be used when inserting and assembling a key segment between other normal segments from the axial direction.

〔Effect of the invention〕

As explained above, according to the present invention, by utilizing the axial movement function of the entire erector, when replacing the tail seal, etc., there is no need to insert a spacer as in the past. Work can be done extremely easily and quickly.

Furthermore, since it can be used when incorporating a key segment, the sliding rod can be shortened accordingly, and the movable (swivel) part can be made more compact.

[Brief explanation of the drawing]

1 to 5 are drawings for explaining the present invention in detail. FIG. 1 is a perspective view of the present invention applied to a double erector, and FIG. 2 is a perspective view of the double erector. A side sectional view of the equipped shield excavator, and FIG. 3 shows a rear view of the same. FIG. 4 is a perspective view of essential parts of the segment gripping device, and FIG. 5 is a side sectional view when the present invention is applied to a tunnel excavator equipped with a single erector. FIG. 6, FIG. 7, and FIG. 8 are explanatory diagrams of a conventional tunnel boring machine. ■...Shield frame, LA...Tail frame, 2...Support ring, 3...Strut, 4...
・ Guide beam, 5... drum, 5a, 5b
...Guide arm, 6...Rear erector-6A...
Front erector 7, 7A...Swivel wheel, 8...Movement jack, 9.9A...Drive motor, 1O1IOA・
...Bearing, 11. IIA...Support arm, 1
4.14A... Hanging beam, 15.15A... Sliding rod, 17.17A... Segment gripping device, S.
...Segment, S'...Existing segment, T
s...Tail seal. $5 Figure 7 Figure 3 Volume 6 Figure

Claims (2)

[Claims] (1) A guide beam held on the tunnel excavating machine side is provided in the axial direction of the tunnel excavating machine, a drum is provided on the guide beam, an erector is disposed on this drum, and
A tunnel excavating machine characterized in that a moving mechanism is provided for making the entire erector movable together with the drum in the axial direction of the tunnel excavating machine. (2) A guide beam with one end fixed to the tunnel excavator side is provided in the axial direction of the tunnel excavator, and a drum supported via a guide arm is provided on the guide beam, and in front and/or behind the drum. A tunnel excavating machine, characterized in that an erector is installed, and a moving jack is connected between the drum and the guide beam, so that the entire erector together with the drum can be moved in the axial direction of the tunnel excavating machine.