JPH074181A - Shield machine having cutting device for drain material or the like - Google Patents

Abstract

PURPOSE:To enable a cut drain material or the like to be easily discharged by providing a peripheral cutter section projected from the cutter head of a shield machine forward of a cutter bit, and arranging cutting blades at different distances. CONSTITUTION:Circular cutting blades 13 and so forth are laid on a cutter head 3 fitted to the front of a shield machine 1 with the peripheral cutting sections projected forward of cutter bits 2 and so forth, and a plurality of the cutting blades 13 are laid at different distances from the center of the cutter head 3. Then, blade mounting bodies 11 and so forth are erected and a working face 9 is excavated with a shield machine l. Concurrently, each of the blades 13 fitted to the bodies 11 cuts the face 9, while rotating along the rotational locus thereof. A drain material or the like generated due to the blades 13 is cut along the internal and external surface thereof and broken into pieces. According to this construction, the cutter bits 2 can be prevented from being entangled in an obstacle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shield machine having a cutting device for drain material and the like, and more particularly to a shield machine having a cutting blade as a device for cutting the drain material.

[0002]

2. Description of the Related Art In a closed shield construction method, a synthetic fiber bundle called a drain material sometimes appears on the face of a face. Therefore, it is necessary to cut the drain material and remove it, but as a cutting method, after improving and stabilizing the cutting face ground by injecting a chemical solution, the worker installed the partition wall and the cutting face in front of the shield machine. And a method of cutting the drain material by using a pick or a gas cutter, and the drain material is hooked on the cutter bit provided on the front end face of the shield machine to remove the drain material. A method of forcibly tearing and cutting is known.

[0003]

In the former case of the prior art described above, while the worker enters the space between the partition wall and the face of the shield machine to cut the drain material, the shield machine is operated. However, since the space between the partition wall and the face is narrow, the workability is poor, and the working environment is deteriorated by the gas generated during cutting, which is extremely dangerous. At the same time, the work is performed under pressure, which makes the work difficult. Further, in the latter case, since the drain material is forcibly taken into the shield by the cutter bit, the surrounding ground is disturbed, the ground surface is sunk, and the drain material may be entangled with the cutter bit.

Therefore, there arises a technical problem to be solved in order to efficiently cut the drain material without stopping the work of the shield machine. The present invention solves the problem. With the goal.

[0005]

DISCLOSURE OF THE INVENTION The present invention has been proposed in order to achieve the above-mentioned object, and in a cutter head arranged in the front part of a shield machine, a peripheral edge part is located in front of the cutter bit. A shield machine equipped with a cutting device such as a drain material in which a cutting blade is rotatably arranged so as to project, and a plurality of the cutting blades are arranged at positions different in distance from the center of the cutter head. The present invention provides a shield machine equipped with a cutting device for drained drain material.

[0006]

With the rotation of the cutter head arranged in the front part of the shield machine, the cutting blade incorporated in the cutter head rotates and the drain appears on the face of the face along the rotation trajectory. Cut the material. Thus, the excavation work of the face face by the shield machine and the cutting work of the drain material by the cutting blade are simultaneously performed.

At this time, since the peripheral edge portion of the cutting blade projects forward from the cutting bit fixed to the cutting head, the drain material or the like appearing on the face is first cut by the cutting blade. After that, the cutting face is excavated by the cutter bit. Moreover, the cutting blade cuts the drain material and the like along its own rotation locus, and a plurality of cutting blades are arranged at positions different in distance from the center of the cutter head. Therefore, the outer peripheral portion of the drain material and the like and the inner peripheral portion thereof are also cut into small pieces.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to FIGS. FIG. 1 is a front view, and FIG. 2 is a vertical side view in which a main part is cut away. In the figure, 1 indicates a shield machine. At the front end of the shield machine 1, a cutter head 3 having cutter bits 2, 2 ... Attached thereto is provided. In the illustrated example, the cutter head 3 is formed in a cross shape with a cutas pork, but it is not limited to this. The cutter head 3 is fixed to the rotary shaft 4, and the rear portion of the rotary shaft 4 is provided on the front surface of the shield machine 1 with a certain distance from the cutter head 3. The partition 5 is inserted to fit the large gear 6, and the large gear 6 is meshed with the pinion gear 8 of the drive motor 7 to rotate the cutter head 3 and the cutter attached to the cutter head 3. Face 2 with bits 2, 2 ...
Is excavated, and the chip is discharged to the outside via the screw conveyor 10.

Thus, the cutter head 3 is provided with recesses 3a, 3a ... Furthermore, the recess 3
A plurality of a, 3a ... Are provided at different positions from the center of the cutter head 3. Then, each recess 3a, 3
a ... One end of each of the blade mounting bodies 11, 11 ... Is pivotally attached to one side part of the blade mounting body 12, and the cutting blades 13, 12 are respectively attached to the other ends of the blade mounting bodies 11, 11. 13 ... One for each one is rotatably supported. In addition, the peripheral edge portions of the cutting blades 13, 13 ... Are arranged so as to project forward from the cutter bits 2, 2.

Further, when the blade mounting body 11 is mounted in the recess 3a provided at the end of the cutter head 3, the cutting blade 13 is attached to the cutting head 3 by the cutting head 13.
When the blade mounting body 11 is mounted so that the blade mounting body 11 is mounted so as to project slightly outward from the tip of the blade head, and the concave portion 3a is provided in the middle portion of the cutter head 3, the cutting blade 13 rotates freely. The enlarged recessed portion 3b is continuously provided on one side of the recessed portion 3a so that the cutting blade 13 is disposed in the enlarged recessed portion 3b, but it is not limited thereto.

Further, in order to tilt the blade mounting body 11 backward by 90 degrees and further allow the blade mounting body 11 to stand upright by 90 degrees, the piston of the tiltable cylinder 14 is provided on the back surface of the blade mounting body 11. The tip of the rod 14a is pivotally supported, and the retractable cylinder 14 is attached to the cutter head 3
Is pivoted on the back of. Thus, when it is not necessary to cut the drain material 15 and the like by the cutting blades 13, 13, ..., The blade mounting body 11 is tilted backward by 90 degrees to stand by. Further, in order to rotate the cutting blade 13, a hydraulic motor is provided in the blade mounting body 11.

Further, there is a possibility that the earth and sand adhere to the cutting blade 13 and the drain material or the like cannot be cut. In order to prevent this, the cutting blade 1
It is desirable to inject high-pressure water toward No. 3. It passes through the center of the rotary shaft 4 and a high-pressure hose (not shown) arranged in the cutter head, is sprayed toward the cutting blade 13, and removes the sand and the like adhering to the cutting blade 13. A swivel joint is interposed at an appropriate position of the high pressure hose.

Since one embodiment of the present invention is constructed as described above, the blade mounting bodies 11, 11, ... Are erected, and the shield face excavator 1 is used to excavate the face 9 at the same time when the blade mounting body 11 is mounted. The cutting blades 13, 13 ... Pivotally attached to the bodies 11, 11 ...
Cut along the rotation trajectory of. In that case, an obstacle existing on the face 9 and entwined with the cutter bits 2, 2, ... Is first cut by the cutting blades 13, 13. At this time, since a plurality of cutting blades 13, 13 ... Are arranged at positions different in distance from the center of the cutter head 3, the drain material 15 and the like by the cutting blades 13, 13 ... The inner peripheral portion is cut and shredded, so that the obstacle is entangled with the cutter bits 2, 2 ... And pulled by the rotation of the cutter bits 2, 2. Since there will be no land subsidence, there will be no ground subsidence.

In the above embodiment, the spoke head was mainly used for the earth pressure system shield as the cutter head, but the present invention should not be limited to this, and it is used for the muddy water shield machine. A face plate type cutter head may be used. The present invention can be variously modified without departing from the spirit of the present invention, and it goes without saying that the present invention extends to the modified one.

[0015]

As described in detail in the above one embodiment, the present invention can cut the outer periphery of the drain material and the like and the inner portion of the drain material appearing on the face of the face, prior to the excavation by the cutter bit of the shield machine. It is possible to easily discharge the cut drain material and the like together with the excavated soil. Therefore, without affecting the ground except the cross section of the shield excavation,
Further, since the drain material is not pulled in by the cutter bit, the ground subsidence does not occur.

Also, the cutting work of the drain material can be performed without stopping the excavation work of the shield machine.
In addition, since it is not necessary for a worker to come out to the face of the face to perform the cutting work of the drain material, the present invention has various kinds of effects, such as contributing to improvement of workability and safety.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the invention according to claim 1.

2 is a partially cutaway vertical side view of FIG.

[Explanation of symbols]

 1 Shield excavator 2 Cutter bit 3 Cutter head 3a Recess 11 Blade mounting body 13 Cutting blade

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Norio Itoi 5-8-4 Nishi-Kamata, Ota-ku, Tokyo (72) Inventor Yusuke Matsushita No. 1 Tsukuto-cho, Shinjuku-ku, Tokyo Kumagai Gumi Tokyo Head Office (72 ) Inventor Shigeharu Matsushita 1 Tomiie-cho, Kanagawa-ku, Yokohama, Kanagawa 1 Kumagai Gumi Yokohama Branch Co., Ltd. (72) Inventor Shin Koda Honohara 2-chome, Toyokawa, Aichi Prefecture Kumagai Gumi Toyokawa Plant (72) Invention Person Tetsuo Nakayama 1 Tomiie-cho, Kanagawa-ku, Yokohama, Kanagawa Prefecture 1 Kumagai Gumi Co., Ltd. Yokohama Branch (72) Inventor Hideki Hagiwara 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Construction Co., Ltd. (72) Inventor Kawaguchi Hiroyuki 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Construction Co., Ltd. (72) Inventor Hiroshi Tate Shihoura 1-3-2, Shibaura, Minato-ku, Tokyo In the formula company (72) inventor Taniguchi TadashiHiroshi Shibaura, Minato-ku, Tokyo-Chome No. 2 No. 3 Shimizu within Co., Ltd.

Claims (2)

[Claims] 1. A drain member, etc., characterized in that a cutting blade is rotatably arranged on a cutter head arranged in a front portion of a shield machine so that a peripheral edge portion projects forward from a cutter bit. Shield machine with cutting device. 2. A shield machine having a cutting device for drain material and the like, wherein a plurality of the cutting blades are arranged at positions different in distance from the center of the cutter head.