JP3183753B2 - Segment erector of shield machine - 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 erector for assembling segments along the inner wall of a tunnel excavated by a shield machine.

[0002]

2. Description of the Related Art At the rear of a shield machine for excavating a conventional tunnel, there is a segment erector that automatically assembles segments along the inner wall of the tunnel excavated by a shield body (for example, Japanese Patent Application Laid-Open No. 2-47536). .

As shown in FIG. 1, the above conventional segment erector has an E-shaped frame b which can be raised and lowered by a lifting jack a, and an erector head e which can be finely turned and rolled by a fine turning jack c and a rolling jack d. And the segment f
Is held, and the turning ring g is turned, whereby the segments f are sequentially assembled along the inner wall of the tunnel.

[0004]

However, in the conventional segment erector, since the six-axis drive system for determining the segment attitude is concentrated near the erector head e, the structure near the erector head e becomes more complicated. The U-shaped frame b and the elevating rod h for supporting the U-shaped frame so as to be able to move up and down are large, so that there is a problem that the U-shaped frame b cannot be used particularly in a small-diameter shield machine. SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the invention is to provide a segment erector having a simple structure and which can be easily applied to a shield excavator having a small diameter.

[0005]

According to the present invention, in order to achieve the above object, an inner wall of a tunnel excavated by a shield body is covered with a segment assembled by a segment erector provided at a rear portion of the shield body. In the shield machine described above, a support bracket for the erector head, which can be raised and lowered and finely rotated by a link mechanism, is provided on a swivel ring rotatably provided at the rear portion of the shield body so as to be freely rollable with respect to the link mechanism. At the same time, the segment holding member is supported on the support bracket via a yawing shaft so as to freely yaw.

[0006]

The above structure simplifies the structure in the vicinity of the erector head, so that a sufficient working space can be secured and large parts such as a U-shaped frame are not required. be able to.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described in detail with reference to the drawings shown in FIGS. In FIG. 2, reference numeral 1 denotes a shield body, and a cutter head 2 is rotatably provided at a front portion. Reference numeral 3 denotes a segment erector provided at a rear portion of the shield main body 1 and having a revolving ring 5 supported by a plurality of guide rollers 4 installed along the inner periphery of the shield main body 1. Is the swing motor 11
Is turned.

A substantially L-shaped bracket 6 is attached to the rear surface of the turning ring 5, and one end of a lifting link 7 is pivotally attached to the bracket 6. A lifting jack 8 is provided between the lifting link 7 and the bracket 6, and the lifting jack 8 is provided by the lifting jack 8.
Is vertically movable in the Z-axis direction, and the other end of the elevating link 7 is a substantially turning link 9
Is pivotally mounted, and the fine turning link 9 and the elevating link form a serial link. A fine turning jack 10 is provided between the fine turning link 9 and the lifting link 7.
The fine turning jack 10 allows the fine turning link 9 to swing in the y 'direction.

At the lower end of the fine turning link 9, a support bracket 13 a of an elector head 13 is rotatably supported by a rolling shaft 12. The rolling shaft 12 is provided so as to be parallel to the excavation direction,
A rolling jack 15 provided between the upper end of the fine turning link 9 and the support bracket 13a is swingable about a rolling shaft 12. A slide support bracket 17 is rotatably supported on the support bracket 13a by a yawing shaft 16 provided to be orthogonal to the rolling shaft 12.

A yaw jack 18 is provided between the slide support bracket 17 and the support bracket 13a. The yaw jack 18 supports the slide support bracket 17 so as to be rotatable about a yaw shaft 16. On both ends of the slide support bracket 17, a pair of guide rods 19 are provided so as to project rearward.
0 is slidably supported. The slide member 20
A guide rod 19 is provided between the
Two sliding jacks 21 are provided so as to be parallel to the sliding jack 21. The sliding jacks 21 allow the sliding member 20 to slide in the X-axis direction.

[0011] opposite ends of the slide member 20, the protruding piece 20a downward is being projected, pitch segment holding member 24 to the distal ends of the projecting pieces 20a is a pin 24a
It is quenching freely supported. The segment holding member 24 is curved along the curvature of the segment 23 to be assembled, and is provided with a segment holding portion (not shown) on the outer peripheral surface side. 25 in the figure is a segment 23
5 shows a segment supply device that moves the segment holding member 24 to a position where it can be held.

Next, the operation will be described. When the segment holding member 24 holds the segment 23 supplied by the segment supply device 25, the turning ring 5 is turned in the Y-axis direction by the turning motor 11, and the segment 23 is moved to the assembly position. Be moved. Thereafter, the lifting link 7 is rotated by the lifting jack 8, and the erector head 13 is moved up and down via the fine turning link 9, thereby performing positioning in the Z-axis direction. The alignment in the y'-axis direction is performed by the fine turning jack 10.
, And the support bracket 13a is simultaneously operated by the rolling jack 15 to perform the positioning around the rolling shaft 12, and the positioning is performed by the combined operation, thereby accurately positioning the already assembled segment 23. .

When the positioning of the segment 23 is completed, the sliding jack 21 moves the X along the guide rod 19.
The segment 23 is assembled at a predetermined position by moving the slide member 20 in the axial direction. By repeating the above operation, the segment 23 is assembled following the already assembled segment 23. FIG. 5 shows an embodiment in which the order of the lifting link and the fine turning link is reversed, the fine turning link 9 is provided on the bracket 6, and the lifting link 7 is provided on the end side.

FIG. 6 shows another embodiment in which the movement in the X-axis direction is performed by the parallel link mechanism 30 and the slide support bracket 19 and the slide member 20 in the erector head 13 are omitted. That is, one end side of the pair of parallel links 30b is pivotally attached to the bracket 30a protruding from the rear surface of the turning ring 5 so as to be spaced apart in the front-rear direction. A sliding jack 21 is provided between the other end of the parallel link 30b and the turning ring 5, and the lifting link 7 and the lifting jack 8 attached to the other end of the parallel link 30b by the sliding jack 21. Are moved in the X-axis direction. Since the structure after the lifting link 7 is the same as that of the above-described embodiment, the description thereof is omitted, and the segment holding member 24 is supported by the yawing shaft 16 via the yoke 33.

Then, the already assembled segment 23
7 is held at the position shown in FIG. 7, the sliding jack 21 is reduced and moved in the X-axis direction to the assembling position, and further, the swivel ring 5 is turned to move it to the assembling position. Can be assembled in place.

FIG. 8 shows another embodiment in which the parallel link mechanism 35 and the parallel link mechanism 37 move the erector head 13 in the Z-axis direction. Is performed by moving the L-shaped bracket 36 up and down by the parallel link mechanism 35 and the lifting jack 8. A parallel link mechanism 37 and the fine turning jack 10 are attached to the L-shaped bracket 36.
The support bracket 13a of the erector head 13 is finely turned by the fine turning jack 10. The operation at the time of assembling the segments is the same as that of the embodiment shown in FIG.

On the other hand, FIG. 9 shows another example in which a parallel link mechanism 30 for moving in the X-axis direction is arranged on both sides of the elector head 13 and the elector head 13 is attached to these parallel link mechanisms 30 via a serial link mechanism 37. In the embodiment, a serial link mechanism 37 is composed of a pair of links 37a and 37b which can be freely bent, a lifting jack 10 and a fine turning jack 8. The support bracket 13a of the erector head 13 is supported between the distal ends of the links 37b. To move the erector head 13 in the Z-axis direction and to make a fine turn, as shown in FIG. This is done by operating them simultaneously.

[0018]

According to the present invention, as described in detail above, since the elevator head is moved up and down by the link mechanism, a large-sized member such as a conventional U-shaped frame and a lifting rod is not required. The structure in the vicinity of the erector head can be simplified, and it can be easily applied to a small diameter shield machine. In addition, since a large working space can be secured around the erector head by downsizing the lifting mechanism, the assembling work of the segments can be performed safely and efficiently.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a conventional segment erector.

FIG. 2 is a partially cutaway side view of a shield machine equipped with a segment erector according to one embodiment of the present invention.

FIG. 3 is a perspective view of a segment erector according to one embodiment of the present invention.

FIG. 4 is a mechanism configuration diagram showing a mechanism of a serial link of a segment elector according to an embodiment of the present invention.

FIG. 5 is a configuration diagram showing a serial link mechanism of a segment elector according to another embodiment of the present invention.

FIG. 6 is a perspective view of a segment erector according to another embodiment of the present invention.

FIG. 7 is an operation explanatory view of a segment erector according to another embodiment of the present invention.

FIG. 8 is a perspective view of a segment erector according to another embodiment of the present invention.

FIG. 9 is a perspective view of a segment erector according to another embodiment of the present invention.

FIG. 10 is an operation explanatory view of a segment erector according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shield main body 3 Segment elector 5 Revolving ring 13 Elector head 13a Support bracket 16 Yawing axis 23 Segment 24 Segment holding member

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-4-366299 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) E21D 11/40

Claims (3)

(57) [Claims] 1. A shield machine in which an inner wall of a tunnel excavated by a shield body 1 is covered by a segment 23 assembled by a segment erector 3 provided at a rear portion of the shield body 1. Swivel ring 5 provided at the rear of 1 to be free to swivel
To, the support brackets 13a of the lifting and fine pivotable erector head 13 by a link mechanism, the rolling freely provided to said link mechanism, the yaw axis 16 to the support bracket 13a, and the pitching shaft 2
Oyo yawing segment holding member 24 via the 4a
Fine pitching freely formed by bearing shield machine segment erector. 2. The segment erector according to claim 1, wherein the parallel movement of the erector head is performed by a parallel link mechanism. 3. The segment erector according to claim 1, wherein the lifting and lowering and fine turning of the erector head are performed by a serial link mechanism.