JPH0331880B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a segment chucking device in an erector of a shield tunneling machine, and more particularly, the present invention relates to a segment chucking device in an erector of a shield tunneling machine, and more particularly, a chucking arm automatically holds a segment and prevents swinging. The present invention relates to a segment chucking device for moving segments for constructing tunnel walls while enabling centering of the segments using a stop arm.

[Conventional technology]

After the tunnel is excavated, segments are sequentially assembled into an annular shape on the inner surface of the tunnel to form the tunnel wall. When the segment is a concrete segment, conventionally, as shown in FIG. 1, the chucking operation between the segment 1 and the erector 2 is performed as follows. First, the hanging metal fitting 3 is screwed into the threaded portion 3a of the segment 1 as obtained. After confirming that the hanging hole 3b of the hanging fitting 3 (in the case of a stay segment, the hanging hole provided in the segment component member) matches the hanging hole 2b of the chucking part 2a of the erector 2, The hanging pin 4 is inserted manually.

[Problem to be solved by the invention]

By the way, Japanese Utility Model Publication No. 43-6248 describes a segment gripping device using a link mechanism that is capable of gripping a segment by two sets of arms that swing when a pull rod is pulled. . If such a structure is adopted and the pull rod is operated manually, the segment pin can be gripped. This is because when one set of arms is rotated by the pull rod, the other sets of arms swing around their central portions, and their ends move toward each other. However, when operating as a chucking device, it is necessary to rely on human hands, and automation cannot be promoted. Furthermore, two sets of arms operated by pull rods are required.
There are problems such as the link mechanism becoming complicated and the reliability of operation being poor.

On the other hand, Japanese Utility Model Publication No. 44-17264 also discloses a segment gripping device that exhibits the above-mentioned functions. This allows the segment to be gripped by a pair of arms that swing as the cylinder expands and contracts, achieving automation. If such a structure is adopted and the expansion and contraction operation of the cylinder is controlled, it is possible to grip the segment by pinching, for example, the corners of both ends with the ends of the arms. However, the bases of both arms serve as centers of rotation, and a cylinder for realizing a gripping operation is attached so as to connect the central portions of both arms. As a result, even when the cylinder is compressed, both arms do not necessarily rotate by the same amount, which disrupts the synchronized movement when gripping the segments, or makes it impossible to grip the segments, which hinders the overall movement. There is a problem of lack of smoothness.

Returning to FIG. 1, in order to prevent the swinging of the segment 1 chucked to the erector 2 via the hanging fitting 3, the hanging pin 4, and the chucking portion 2a of the erector 2, for example, Japanese Utility Model Publication No. 43-6248 is proposed. The erector 2 may be provided with a suitable number of steady rest mechanisms 5 similar to those described. The steady rest mechanism 5 includes cylinders 6 provided respectively.
By expanding and contracting the inner surface 7 of segment 1
The segment 1 is held by pressing the holding fitting 8. At this time, it is necessary to synchronize the amount of expansion and contraction of each cylinder 6, 6, so if centering of segment 1 is required, in order to equalize the amount of oil flowing to both cylinders 6, 6, oil amount distribution (not shown) is required. There is a drawback that valves and the like are required, and cylinders must be provided corresponding to the respective holding fittings.

The present invention has been made in view of the above-mentioned problems, and its purpose is to allow the erector to automatically grip the segments evenly on the left and right sides without relying on humans to chuck the segments when assembling the segments using the erector. In addition, the gripping mechanism for this purpose can be simplified, and the segment can be automatically and synchronously and evenly prevented from steadying, allowing the segment to be stably held, as well as being able to automatically hold the segment when chucking. To provide a segment chucking device in an erector of a shield excavator, which allows centering to be performed with one cylinder, thereby making it possible to easily adjust the segments to the assembly position. be.

[Means to solve the problem]

The present invention is applied to a segment chucking device, in which an erector is adapted to grip a segment by a chucking arm that rotates due to the expansion and contraction operation of a chucking cylinder.

Its characteristics are as shown in FIGS. 2 and 3, the chucking arm 13 consists of a pair of gripping arms 13A, 13B, and one end of the gripping arms 13A, 13B is connected to one end of the gripping arms 13A, 13B. It is attached to the lifting platform 11 together with the chucking cylinder 12. Due to the expansion and contraction of the chucking cylinder 12, one ends of both gripping arms 13A and 13B simultaneously reciprocate, so that the other ends of both gripping arms 13A and 13B are inserted into the concave portion 1a formed on the inner surface of the segment. Each of the gripping arms 13A, 13B is rotatably supported around its intermediate portion so that the extended and fixed chucking metal fitting 14 can be gripped. Chatting arm 1
At least a pair of steady rest arms 20, 20 that rotate are provided on both sides of 3, and each of the steady rest arms 20, 20 can be used as a lift platform together with one steady rest cylinder 19 connected to one end of the steady rest arms 20, 20. 11, and the other ends of both steady rest arms 20, 20 are attached to the steady rest cylinder 19.
The steady rest arms 20, 20 press the inner surfaces of the segment 1 on both sides outside the concave portion 1a by the expansion and contraction operation of the steady rest arms 20, 20 so as to stably hold the segment 1 and center the segment 1 at the same time.
is rotatably supported around its intermediate portion.

〔Effect of the invention〕

According to the present invention, a chucking arm consisting of a pair of opposing gripping arms that rotates when one chucking cylinder expands and contracts is provided on the lifting platform, and this chucking arm is swung by the chucking cylinder. By moving the chuck metal fitting in the recessed part provided on the inner surface of the segment, it is possible to clamp the chucking metal fitting in the recessed part provided on the inner surface of the segment.
Segment tracking work can be smoothly performed without direct human intervention. In addition, at least a pair of steady rest arms are provided on both sides of the chucking arm, which rotate by the expansion and contraction of one steady rest cylinder, and this rotation presses the inner surface of the segment to stably hold the segment. Since centering is possible, the chucking work is speeded up and the segments are prevented from steadying when clamping them.Furthermore, the centering of the segments is naturally accurate, and the assembly work of the segments by the erector can be carried out efficiently. The mechanism of such a tracking arm or steady rest arm can be kept simple with a small number of parts, and in addition, its operation is reliable, and together with the uniform and synchronous operation of each arm, the segment The efficiency of construction work will be improved.

〔Example〕

Hereinafter, the present invention will be explained in detail based on examples thereof.

Figure 2 is a front view of one side of the erector with the erector lowered prior to chucking a segment, Figure 3 is a front view of the other side with the erector being raised to chuck a segment, and Figure 4 is a front view of the other side of the erector with the erector lowered prior to chucking a segment. It is a - line arrow view of a figure.

In FIGS. 2 to 4, a segment chucking device 30 in a shield tunneling machine 40 is shown.
is on the lifting platform 11 on the upper part of the main body of the erector 10,
A pair of opposing chucking arms 1 that rotate by the expansion and contraction of one chucking cylinder 12
3 is provided. This tracking arm 1
3 are two dogleg-shaped gripping arms 13A, 13B.
The chucking bar 13a at the tip thereof is a concave portion 1a provided on the inner surface 22 of the segment 1.
(See FIG. 4) The shaft 15 is rotatably attached at its center bend so that it can hold, for example, the inverted T-shaped chucking fitting 14 shown in FIGS. Supported. The erector 10 is provided with a cylinder 17 and a guide rod 18 for raising and lowering the lifting platform 11.

Further, on both sides of the chucking arm 13, there are at least a pair of steady rest arms 20, 20 (in FIG. 4, one pair is shown at the front and rear) which rotate by the expansion and contraction of one steady rest cylinder 19 (see FIG. 4). ) will be established. This steady rest arm 2
A pressing member 21 is fixed to the tip of the segment 0, and this presses the segment inner surface 22 to stably hold the segment 1. The steady rest arms 20, 20 are rotatable at their intermediate portions, and are fixed to the aforementioned shaft 15 supported on the bracket 16 by means of a key 23 (see FIGS. 5 and 6). Supported in the state.

This steady rest arm 20, the above-mentioned chucking arm 13, and the steady rest cylinder 19 and chucking cylinder 12 that drive them are the fourth
As shown in the figure, it can be slid on the lifting platform 11 by means of a sliding cylinder 24 that moves in the directions of arrows M and N and a guide rod 24a shown in FIG. Further, an expansion cylinder 25 for preventing one end of another segment adjacent to the segment 1 from sagging, and a sagging prevention fitting 26 for that purpose are also provided.

Since the segment chucking device 30 of this example is configured as described above, it can be operated as follows.

In FIG. 4, the segment 1, which has been conveyed by a chain conveyor (not shown) in the direction of the chucking position of the segment, that is, in the direction of arrow N, is located at the center position of its concave portion 1a and in the lowered state (see FIGS. 2 and 5). ) is stopped at a position where the center position of the segment chucking device 30 on the lifting platform 11 is approximately coincident with the center position. At this time, the chucking cylinder 12 in FIG. 5 is extending in the direction of arrow B, and the chucking arm 13 is in a state of being rotated in the direction of arrow F.

Next, when the chucking cylinder 12 is contracted in the direction of arrow C as shown in FIG.
direction, and clamps the chuck fitting 14 of the concave portion 1a of the segment 1. At this time, the height of the lifting platform 11 is adjusted so that the position of the chucking device 30 can be set so that a gap A can be provided between the surface 14a of the chucking fitting 14 and the chucking bar 13a, as shown in FIG. I'll keep it.

The steady rest cylinder 19 extends in the direction of arrow B in FIG. When reduced in the direction of arrow C, the steady rest arm 20,
20 rotates in the direction of arrow E around a shaft 15 supported by a bracket 16 which also serves as a bearing.

At this time, the pressing members 21, 21 are simultaneously rotated on the left and right sides by the same amount of movement due to the operation of one steady rest cylinder 19, so they press the inner surface 22 of the segment 1 equally and lift the segment 1, as shown in FIG. The gap A disappears as shown in Figure 6. Therefore, since the segment 1 floats on the not-illustrated chain conveyor, the chain conveyor can be returned to the position before being carried in. Of course, if the steady rest arms 20 are arranged in pairs at the front and rear as shown, the four corners of the segment 1 can be held equally and stably.

By the way, when the segment 1 is floating above the chain conveyor as described above, there is no frictional force therebetween, so the segment 1 is rotated in a horizontal plane by the chucking fitting 14 being held by the gripping arms 13A and 13B. Its centering is done automatically and it can be held in the correct position required for assembly of the segment 1.

With the segment 1 being chucked and centered as shown in FIG. 6, it is moved horizontally on the lifting platform 11 to a predetermined position by expanding and contracting the cylinder 24 in the directions of arrows M and N in FIG. After this position, the erector drum 28 supported by a suitable number of rollers 27 can be rotated to move the segment 1 to the assembly position, and the cylinder 17 can be further extended and installed in the assembly position. Thereafter, the segment 1 is pressed and held against the adjacent already assembled segment ring surface by a jack in a shield tunneling machine (not shown), thereby assembling one segment.

When this assembly is completed, as shown in FIG. 5, the steady rest cylinder 19 extends in the direction of arrow B and simultaneously rotates the plurality of steady rest arms 20, 20 in the direction of arrow F. Next, the checking cylinder 12
The tracking arm 13 also extends in the direction of arrow B.
simultaneously rotate in the direction of arrow F to release segment 1 from being held. In this way, the segments are assembled one after another to complete the assembly of one segment ring.

By the way, when the segment 1 is carried in by a chain conveyor (not shown) located near the bottom of the shield excavator 40 as shown in FIG.
After holding the segment 1 while maintaining a gap A between them, the steady rest arm 20 is brought into contact with the inner surface 22 of the segment 1 while maintaining this gap A. After that, when the segment chucking device 30 is raised in the direction of arrow K by a distance equal to or more than the gap A, the segment 1 on the chain conveyor is separated from the chain conveyor, and the chain conveyor can be easily returned to the position before being carried in. Can be done.

Next, in the elevated segment chucking device 30, the steady rest arm 20 is further rotated and the inner surface 22 of the segment 1 is pressed to eliminate the gap A, and the segments 1 are sequentially moved in the same manner as in the previous embodiment. Can be assembled.

In addition, in FIG. 3, when the expansion cylinder 25 expands and contracts, the hanging prevention fitting 26 rotates in the directions of arrows G and H about the shaft 26a, rising and falling, and is now being assembled. It is possible to prevent other already installed segments adjacent to segment 1 from sagging.

As explained in detail above, when assembling segments sequentially to construct a segment ring, one chuck cylinder automatically synchronizes and evenly distributes the segments without the need for direct human intervention. Can do chatting. In addition, the rotation of one of the pair of steady rest arms by the steady rest cylinder presses the inner surface of the segment, allowing the segment to be stably held and centered at the same time. Therefore, the chucking operation is speeded up and the segments are prevented from steadying when clamping them.Furthermore, the centering of the segments becomes naturally accurate, and the segment assembly operation using the erector can be carried out efficiently. The mechanism for operating each arm is also simple, ensuring reliable operation of each component and facilitating segment assembly work within the tunnel.

[Brief explanation of the drawing]

FIG. 1 is a conventional chucking device, FIG. 2 is a front view of one side of the segment chucking device of the present invention when the erector is in the lowered state, FIG. 3 is a front view of one side of the segment chucking device of the present invention when the erector is in the raised state, and FIG. 4 5 is an enlarged view of the main part of the chucking device, and FIG. 7 is an enlarged view of the main part of a different embodiment. 1... Segment, 1a... Recessed portion, 10...
Erecta, 11... Lifting platform, 12... Chucking cylinder, 13... Chucking arm, 13
A, 13B... Gripping arm, 14... Chucking metal fitting, 19... Steady rest cylinder, 20... Steady rest arm, 22... Segment inner surface, 30...
...Chatting device, 40...Shield excavator.

Claims (1)

[Scope of Claims] 1. A segment chucking device for an erector that is capable of gripping a segment by a chucking arm that rotates due to the expansion and contraction operation of a chucking cylinder. The king arm consists of a pair of gripping arms, and is attached to the lifting platform with one chucking cylinder connected to one end of both gripping arms, and one end of the both gripping arms is fixed by the telescoping operation of the chucking cylinder. By reciprocating at the same time, each of the gripping arms holds its intermediate portion so that the other ends of both gripping arms can grip the chucking metal fitting extended and fixed in the recess formed on the inner surface of the segment. The chucking arm is rotatably supported at the center, and at least a pair of steady rest arms that rotate are provided on both sides of the chucking arm, and each of the steady rest arms has one steady rest arm connected to one end thereof. The steady rest arm is attached to the lifting platform together with a steady rest cylinder, and the other ends of the steady rest arms press against the inner surfaces of the segment on both sides outside the recessed part by the expansion and contraction operation of the steady rest cylinder, thereby stably holding the segment. A segment chucking device for an erector of a shield excavator, characterized in that each steady rest arm is rotatably supported around its intermediate portion so that the segments can be centered at the same time.