JPH0893383A - Spherical shielding excavator - Google Patents

Abstract

PURPOSE: To easily pass a curved line with a small radius, by dividing a parent machine into the front shell and the rear shell and containing a spherical body in the inside of the front shell so as to be rotatable and containing the child machine in the spherical body and surrounding the front shell by a sheath pipe. CONSTITUTION: When a spherical shielding excavator reaches a curve with a small radius, it stretches one middle-bending jack 22 and pushes one side of the front shell 1 forward to bend the front shall 1 and the rear shell 2 at the middle-bending part. The surrounding sheath pipe is also bent and it increases the elongated length of the middle-bending jack 22 in accordance with the advancement of the excavator entering the curved part to increase the bending angle. When it has passed through the smallest place of the curvature, the middle-bending jack 22 is shortened. Next, the length of all jacks is made equal and the sheath pipe 3 and the rear shell 2 are lined up to make a line. The connection of the front shell 1 with the sheath pipe 3 is released and all jacks 24 are stretched. Subsequently, the middle-bending jack is stretched while pushing the segment 4 and a distance material 25 is added between the front shell 1 and the middle-bending jack. The front shell is moved forward and after it has been exposed from the sheath pipe 3, the cutter is removed and the inner spherical body is rotated to advance the child machine.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spherical shield machine.

[0002]

2. Description of the Related Art The structure of a base unit of a conventional spherical shield excavator is such that a cylindrical body is slidably housed inside a cylindrical sheath tube, and the sphere is rotatably housed inside the cylindrical body. A digging machine that is a child machine is stored in the sphere. When the parent machine reaches a predetermined position, this sphere shield machine starts the machine, which is a child machine, by rotating the sphere. Therefore, it has the feature that the excavation direction of the shield tunnel can be changed to a right angle, enabling construction that was previously impossible.

[0003]

The parent machine of the above-described spherical shield excavator, which accommodates the spherical body, tends to increase the length of the entire excavator. Therefore, there is a problem that it is not easy for the master unit to excavate a curve having a small radius existing in the middle of the tunnel except for the case of rotating the sphere and changing the excavation direction to a right angle.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a spherical shield machine capable of easily passing a curve having a small radius. .

[0005]

In order to achieve the above object, a spherical shield excavator according to the present invention is a shield excavator in which a slave unit is housed inside a master unit. It has a structure that can be folded inward by dividing it into a rear body and a rear body, a sphere is rotatably stored inside the front body, a slave unit is stored in this sphere, and only the front body is surrounded by a sheath tube. It features a shield machine.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a spherical shield machine according to the present invention will be described below with reference to the drawings.

<B> Overall Configuration The shield machine according to the present invention comprises a master unit and a slave unit separated from the master unit in an orthogonal direction. This parent machine is constructed by separating into two cylinders, a front body 1 for housing the child machine and a rear body 2 at the rear. Then, the circumference of the front body 1 is covered with a cylindrical sheath tube 3. The front body 1 fixed to the sheath tube 3 and the rear body 2 have a structure capable of being bent in the middle. The slave unit is rotatably housed in a spherical body 12 in the front body 1.

<B> Sheath tube 3 The sheath tube 3 is a cylindrical body for housing the front case 1 as described above.
The front body 1 has a start opening 11 for starting the excavator in the sphere 12. For that purpose, the sheath tube 3 is provided around the front torso 1.
It is to protect the earth and sand from the starting opening 11 while encircling it by excavating. The rear part of the sheath tube 3 is fitted to the front part of the rear body 2, and the structure is such that this part can be bent in the middle. When the sphere shield machine excavates as the master machine, the sheath tube 3 is fixed to the front body 1.

<C> Front Body 1 The front body 1 is also a tubular body and is constructed so as to be slidable inside the sheath tube 3. Inside the front body 1, the sphere 12 is supported by a sphere rotating shaft 17 in the vertical direction and is rotatably accommodated.
Further, a small shield machine is housed in the sphere 12 as a slave unit 5. The front body 1 and the sphere 12 are provided with a sphere seal for waterproofing the rotating portion of the front body 1. In addition, sphere 12 and cordless handset 5
An entrance seal 20 is provided on the sphere 12 to stop the water between them. This cordless handset 5 is provided with a cutter head 13 on the front surface,
It is equipped with all devices such as the shield jack 14 and the erector 15. The front body 1 is formed by cutting out a part of the cylindrical body and opening it as a starting port 11 for starting the excavator in the sphere 12.

The front body 1 is fixed inside the sheath tube 3 by being restrained by bolts or the like. Therefore, if the restraint is released by removing the bolts, the front body 1 is slidably housed in the sheath tube 3. A sheath tube seal 16 for stopping water is provided on the front body 1 between the front body 1 and the sheath tube 3. When the child shield machine is started, it is necessary to first push the front body 1 out of the sheath tube 3. For this reason, a rear body side reaction force wall 26 is projected inward in the rear body 2 in the form of a collar, and a center folding jack 22 is provided between the reaction force walls 23 on the front body 1 side. The front body 1 is pushed out by the extension of the folding jack 22.

<D> Rear Trunk 2 The rear part of the parent machine is constructed as the rear trunk 2. The inner diameter of the rear trunk 2 is formed so that the segment 4 of the parent machine can be assembled. At the front end of the rear body 2, a small diameter portion 2 having a small outer diameter is formed.
1, the small diameter portion 21 is fitted to the rear portion of the sheath tube 3.
In the clearance between the outer diameter of the small-diameter portion 21 and the inner diameter of the sheath tube 3, a middle-breaking seal for stopping water in the middle-folding portion of the master unit and a spherical seat for preventing positional deviation are provided. The rear body 2 and the front body 1 are connected by a plurality of center folding jacks 22. The rear trunk 2 is provided with a shield jack 24 of the master unit, and a reaction force is applied to the segment 4 to propel the whole body. The shape of connection between the rear body 2 and the front body 1 is changed by expanding and contracting a part of the center-folded jack 22. Then, the direction of the sheath tube 3 located on the outer circumference of the front body 1 also changes. As a result, it is possible to pass a steep curve with a small radius.

[0012]

Next, the operation will be described. <a> Excavation of curve (FIG. 2) When reaching a curve with a small radius, some of the jacks 22 for center bending are extended. Since the center-folded jacks 22 are arranged in a state of being evenly distributed around the periphery, one side of the front body 1 is pushed forward by extending the center-folded jacks 22 on the outside of the curve. As a result, the front body 1 and the rear body 2 are bent at the middle folding portions. Since the front body 1 is housed inside the sheath tube 3, when the front body 1 bends with respect to the rear body 2, the positions of the surrounding sheath tubes 3 also bend and move forward. As the shield machine advances into the curved portion, the extension amount of the middle-breaking jack 22 is gradually increased to increase the bending angle. Middle break jack 2 when passing through the minimum radius
2 is gradually shortened again, and the lengths of all the jacks are made uniform so that the sheath tube 3 and the rear body 2 are returned to a straight line.

<B> Start of Child Machine 5 When it reaches a predetermined position, the connection between the front case 1 and the sheath tube 3 is released, and the front case 1 is configured to be slidable inside the sheath tube 3. Then, all the propulsion jacks 24 are extended, bulged to the segment 4, and the center-folded jack 22 is extended. Then sheath tube 3
The front torso 1 inside is pushed forward. However, since the stroke of each jack is short, a spacing member 25 is added between the front body 1 and the center-folded jack 22 to secure a propulsion distance. The spacing member 25 is bolted or welded to the front waist side reaction wall 23. The front body 1 moves forward while excavating the earth and sand by the cutter on the front surface, and eventually the front body 1 is exposed from the sheath pipe 3. In this state, the cutter 13 is retracted and separated from the peripheral cutter. After that, the internal spherical body 12 is rotated to change the direction by 90 degrees and the slave unit 5 is started.

[0014]

As described above, the spherical shield machine of the present invention divides the main unit into the front case 1 and the rear case 2, and the sheath tube 3
According to the configuration, only the front body 1 is surrounded. Therefore,
Even in the case of a sharp curve, it is possible to smoothly perform the work by bending between the front body 1 and the rear body 2 and proceeding, and it is possible to further expand the use of the spherical shield excavator capable of changing the direction to the right angle. It became so.

[Brief description of drawings]

FIG. 1 is an explanatory view of an embodiment of a spherical shield machine according to the present invention.

FIG. 2 is an explanatory diagram when the curve passes.

FIG. 3 is an explanatory diagram of a state immediately before rotation of a child device 5.

FIG. 4 is an explanatory diagram of a master machine excavation state.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kenichi Kaneko 1-25-1 Nishishinjuku 1-chome, Shinjuku-ku, Tokyo Within Taisei Construction Co., Ltd. (72) Inventor Ei Ki-i 1-25-1 Nishishinjuku, Shinjuku-ku, Tokyo Issue Taisei Construction Co., Ltd. (72) Inventor Hiroyuki Ito 11-1 Kitahama-cho, Chita-shi, Aichi Ishikawajima Harima Heavy Industries Co., Ltd. Aichi Factory (72) Inventor Toshiaki Uehara 11-11 Kitahama-cho, Chita-shi, Aichi Harima Ishikawajima Heavy industry Aichi factory

Claims (3)

[Claims] 1. A shield machine in which a child machine is housed inside a parent machine, the parent machine is divided into a front body and a rear body, and a sphere is rotatably housed inside the front body. A shield machine with a child machine housed inside and a sheath tube surrounding only the front body. 2. A shield machine in which a slave unit is housed inside a master unit, which has an opening serving as a starting port in a part thereof and a front body covered with a sheath pipe and covered with a sheath pipe. The main body is composed of the rear body and the rear body, and the front body is slidably housed inside the cylindrical sheath tube, the sphere is rotatably housed inside the front body, and the child shield is housed inside the sphere. A sphere shield machine with an excavator housed in it. 3. A shield machine in which a slave unit is housed inside a master unit, which has an opening serving as a starting port in a part of a side surface, is covered by a sheath pipe, and is covered by a sheath pipe. The main body is composed of the rear body and the rear body, and the front body is slidably housed inside the cylindrical sheath tube, the sphere is rotatably housed inside the front body, and the child shield is housed inside the sphere. The excavator is housed, and the front and rear barrels have a structure that allows for center folding. Configured, sphere shield machine