JP3493503B2 - Structure 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 the structure of a shield machine.

[0002]

2. Description of the Related Art A child shield machine, which is smaller than the parent shield machine, is housed inside, and when the parent shield machine reaches a certain position in the ground, the child shield machine housed inside is started. A shield machine with a configuration that allows it to be developed has already been put into practical use. This type of shield machine is a "two-stage shield machine" that simply moves a small-diameter child shield machine in the same direction, or a child shield machine is housed in a sphere, and this sphere is the parent shield machine. There is a "sphere shield excavator" that is stored in the excavator and advances in a different direction from the parent shield excavator by rotating the sphere when starting.

[0003]

In the structure of the conventional shield machine as described above, the outer cutter of the parent shield machine is annularly arranged around the cutter of the child shield machine. In the case of the two-stage shield machine, the child shield machine is started by passing through the inside of the outer cutter. In the case of a spherical shield machine, the child shield machine is slid inside and the child shield machine is pulled into the sphere, the sphere is rotated, and the child shield machine passes through the back of the outer cutter to start. Is. Therefore, when starting the child shield excavator, it is necessary to separate the circular outer peripheral cutter arranged around the child shield excavator, but since the position of the outer peripheral cutter is not secured, the following There was a problem.

<A> When starting, the pin connecting the outer peripheral cutter and the child shield excavator is pulled out.
However, since the position of the outer peripheral cutter is unstable, if the connecting pin is deformed, it may be difficult or impossible to pull out the pin.

<B> In the case of a two-stage shield machine, when the fixing pin is pulled out or when the child shield machine passes inside the outer cutter, if the outer cutter tilts or moves downward. If so, it is possible that the child shield machine cannot pass through.

<C> In the case of a spherical shield excavator in which a sphere is housed inside a parent shield machine and a child shield machine is housed in this sphere, if the outer cutter is tilted, It is also conceivable that the cutter of the child shield machine may not slide, or that the outer peripheral cutter may become an obstacle when the sphere rotates and the sphere cannot rotate.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and in a shield machine in which a child shield machine smaller than the parent shield machine is housed, It is an object of the present invention to provide a structure of a shield machine that can reliably start a child shield machine.

[0008]

In order to achieve the above object, in the structure of the shield machine of the present invention, a child shield machine smaller than it is housed inside the parent shield machine. In a shield machine, the outer shield cutter of the parent shield machine is placed around the cutter of the child shield machine, and the outer cutter is connected to the inner surface of the parent shield machine so that it can be released. It is characterized by.

[0009]

DETAILED DESCRIPTION OF THE INVENTION An embodiment of the structure of a shield machine according to the present invention will be described below with reference to the drawings.

<B> Overall Configuration The shield machine of the present invention relates to a shield machine having a large diameter, a parent shield machine A, and a small child shield machine B having a smaller diameter accommodated therein. Is. The configuration of the present invention can be applied to a so-called two-stage shield excavator in which both the parent shield excavator A and the child shield excavator B are cylindrically formed. (Figs. 1, 2, 3)

The child shield machine is a cylindrical outer cylinder block 9
The internal cutter drive block 11 is fitted and the structure is slidable with respect to each other. When excavating the sand excavated by the outer peripheral cutter 1 by the mud pipe 13 of the child shield excavator B when the parent shield excavator A is excavating, the outer cylinder block 9 is arranged behind the cutter, This is because the outer cylinder block 9 is projected to the back surface of the cutter during the excavation of the shield machine B to prevent the surrounding ground from collapsing.

Alternatively, the parent shield excavator A is formed in a cylindrical shape, the child shield excavator B is accommodated in a spherical shape, and the spherical body is accommodated inside the parent shield excavator A to form a so-called spherical shield. It can also be applied to excavators. (Figs. 4 and 5)

<B> Peripheral Cutter In any type of shield machine, the outer cutter 1 of the parent shield machine A is arranged in an annular shape around the disk-shaped cutter of the child shield machine B. become.

<C> Connecting Tool A connecting tool 2 is provided on the rear surface of the annular outer peripheral cutter 1. (FIGS. 6 and 7) The connecting tool 2 can be configured by, for example, a U-shaped handle. In addition to the U-shaped frame body, a conventionally known appropriate shape can be adopted in combination with the engagement frame 3. This connecting tool 2 is arranged at a plurality of locations.

<D> Engaging Frame On the inner surface of the master shield machine A, the engaging jack 4 is installed at a position corresponding to the arrangement of the connecting tool 2. (Fig. 6,
7) The engagement frame 3 is provided at the tip of the jack 4. The engagement jack 4 is fixed to the inner surface of the parent shield machine A toward the rear surface of the outer peripheral cutter 1 in parallel to the central axis of the cylindrical shield machine. Therefore, this engagement jack 4
Can extend the engaging frame 3 at the tip end to the connector 2 projecting from the rear surface of the outer peripheral cutter 1.

The engaging portion is, for example, a square-shaped frame body and one frame member at the tip thereof is configured to be openable and closable only against the inner side against the elastic force of the spring. If the tip frame member is configured as an inward opening door type as described above, when the frame member collides with the connector 2, both can be connected, and thereafter, even if a tensile force acts on the tip frame member, it is opened. There is nothing to do.

<E> Engagement Operation Next, the operation will be described. The parent shield excavator A excavates to a predetermined position while the child shield excavator B is stored. When the predetermined position is reached, the rotation of the outer peripheral cutter 1 is stopped. At that time, the outer peripheral cutter 1 is stopped in a state where the connecting tool 2 on the back surface of the outer peripheral cutter 1 is positioned immediately before the engagement frame 3.

The stop position of the cutter is detected by the proximity sensor 7. That is, the gear 6 and the approach sensor 7 are attached to the rear end of the center shaft 11 that rotates together with the cutter in the rotary joint 5 installed at the center of the child shield machine, for detection. Next, the engagement jack 4 is extended. Then, the engagement frame 3 collides with the coupling tool 2 and both are reliably coupled, and the outer peripheral cutter 1 is fixed to the parent shield machine A.

<F> Start of child shield excavator B In the case of a two-stage shield excavator, the face is directly suppressed by a cutter for the purpose of improving the reliability of face stability. The face is not held by grout injection. Therefore, the outer cylinder block 9 of the child shield machine is connected to the child shield machine propulsion jack 1
At 0, slide to the back of the cutter and fix it to the cutter drive block 11 of the child shield machine B. After that, the connecting pin 8 between the child shield machine B and the outer peripheral cutter 1 located in an annular shape on the outer periphery thereof is pulled out.

Then, the tail plate 12 is welded to the rear portion of the child shield machine B to complete the final shape of the child shield machine B. In this state, the propulsion jack 10 of the child shield excavator B is extended, and a reaction force is applied to the parent shield excavator A to start toward the ground. Thus, even when the child shield excavator B advances and passes through the inside of the annular outer cutter 1, the outer cutter 1 is securely fixed inside the parent shield excavator A and therefore tilts or moves. There is nothing to do.

[0021]

As described above, the structure of the shield machine of the present invention is as follows because the outer peripheral cutter 1 is securely fixed inside the parent shield machine A when the child shield machine B is started. It is possible to obtain various effects. <A> Since the position and orientation of the outer peripheral cutter 1 are accurately maintained, the child shield machine B can smoothly pass through the inside thereof. <B> Since the connecting pin 8 with the child shield excavator B is pulled out after the posture of the outer peripheral cutter 1 is held, this pin 8
There will be no accident that makes it impossible to pull out. <C> Even in a shield machine of the type in which a spherical shield machine is housed, since the outer cutter 1 does not tilt or sink, the child shield machine B is pulled into the sphere or the sphere does not rotate. It will not cause any problems.

[Brief description of drawings]

[Fig.1] Diagram of the excavation state of the parent shield machine

[Fig.2] Excavation state diagram of child shield excavator

FIG. 3 is an explanatory diagram of a state in which the child shield machine has started.

FIG. 4 is an explanatory view of an embodiment of the structure of a spherical shield machine.

FIG. 5 is an explanatory view of a state where the child shield machine has started in the spherical shield machine.

FIG. 6 is an explanatory view of arrangement of an outer peripheral cutter and an engagement jack.

FIG. 7 is an explanatory view of an engagement state between the coupling tool and the engagement frame.

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshiaki Uehara 11-1 Kitahama-cho, Chita-shi, Aichi Ishikawajima Harima Heavy Industries Ltd. Aichi factory (72) Hiroyuki Ito 11-11 Kitahama-cho, Chita-shi, Aichi Ishikawajima Harima Heavy Industries Co., Ltd. Aichi factory (56) Reference JP-A-6-173592 (JP, A) JP-A-5-149082 (JP, A) JP-A-4-20698 (JP, A) JP-A 5-44389 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) E21D 9/06

Claims (5)

(57) [Claims] 1. A shield excavator in which a child shield excavator, which is smaller than the parent shield excavator, is housed inside the parent shield excavator, wherein an outer peripheral cutter of the parent shield excavator is arranged on the outer periphery of the cutter of the child shield excavator. A structure is provided for the shield machine, in which a connecting tool is provided on the back surface of the outer peripheral cutter, while an engaging frame is provided on the inner surface of the parent shield machine, and the connecting tool and the engaging frame can be connected and released. . 2. A shield excavator in which a child shield excavator smaller than the parent shield excavator is housed in a parent shield excavator, wherein an outer peripheral cutter of the parent shield excavator is arranged on an outer periphery of a cutter of the child shield excavator. A connector is provided on the back surface of the outer peripheral cutter, while an engagement frame is provided on the tip of the engagement jack on the inner surface of the parent shield machine, and the extension of the engagement jack engages the connector in the released state. The structure of the shield machine, which is configured to connect the frames . 3. A master shield machine, and the slave shield machine, and formed into both tubular of claim 1 or 2, wherein the shield machine structure. 4. A parent shield excavator having a tubular shape, and a child shield excavator having a tubular shield excavator housed in a sphere, wherein the sphere is accommodated in the parent shield excavator. The structure of the shield machine according to Item 1 or 2 . 5. A cylindrical outer cylinder block for a child shield machine.
The structure of the shield machine according to claim 3 , wherein is configured to be slidable in the cutter direction .