JP3244604B2 - 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 slide cutter type shield machine.

[0002]

2. Description of the Related Art Generally, tunnel excavation is performed by a shield machine, and a cutter head is provided with a cutter bit for excavating earth and sand.

[0003] When a hard obstacle such as a reinforced concrete pile, an H-section steel, a sheet pile, or the like exists in the ground, it is difficult to perform cutting with a cutter head of a shield machine.

Therefore, conventionally, when such an obstacle is found, the obstacle has been removed in advance or entered the front of the shield machine, and the obstacle has been removed by an operator.

[0005]

However, in order to remove obstacles in advance, it is necessary to improve the ground in order to ensure the safety of workers, which requires much time and effort. This was causing delays in tunnel construction.

Accordingly, an object of the present invention is to provide a shield machine capable of solving the above problems.

[0007]

To solve the above object, according to an aspect of, the shield machine of the present invention, setting the cutter portion along the face plate center of the cutter head which is rotatably mounted on the front of the shield body in the radial direction , the cutter portion are configured by the plurality of serrated cutters, each cutter adjacent at least, the drive unit is provided for one reciprocate in the radial direction and fixed cutter and these adjacent movable cutters
Are made to face each other .

[0008]

According to the above construction, if an obstacle such as a reinforced concrete pile or a sheet pile appears in front of the shield machine, the movable cutter in the cutter section is reciprocated to easily cut the obstacle. Drilling can continue.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. 1 to 3, reference numeral 1 denotes a shield body of a shield machine, and a cutter head 2 according to the present invention is rotatably supported at a front end portion thereof via a swivel bearing 3. In addition, the cutter head 2 includes a rotation drive device (for example, an electric motor or a motor) that rotates a link gear 4 provided on an outer ring portion (or an inner ring portion) of the slewing bearing 3 and a pinion 5 linked to the link gear 4. Hydraulic motor, etc.)
6 is driven to rotate.

The cutter head 2 has a first cutter portion 11 disposed along the diameter, and a radial direction perpendicular to the first cutter portion 11 and both sides thereof. A second cutter portion 12 is provided, and a normal cutter bit 13 is also disposed on the face plate 2a between the cutter portions 11 and 12 along the radial direction (radiation direction). A leading bit 14 is provided on the outer peripheral portion of.

The above-mentioned cutter units 11 and 12 are shown in FIGS.
As shown in the figure, the central saw-tooth movable cutter 2 attached to the cutter head 2 so as to reciprocate in the diameter direction.
1 and left and right serrated fixed cutters 22 arranged on both sides of the movable cutter 21 and fixed to the cutter head 2 side.

Inside the cutter head 2, there is provided a drive unit, for example, a hydraulic cylinder (also referred to as a hydraulic jack) 23 for reciprocating the movable cutter 21 in each of the cutter units 11, 12 in the diametrical and radial directions. A plurality is provided.

The movable cutter 21 of the first cutter unit 11 will be described. As shown in FIG. 1, connecting members 31 are provided at two positions on the back surface of the movable cutter 21 and each connecting member 31 is provided with two connecting members. Hydraulic cylinder 23A
Are connected. That is, one end of each hydraulic cylinder 23 </ b> A is connected to the face plate 2 a side of the cutter head 2, and the other end is connected to the connection member 31 of the movable cutter 21.

As shown in FIG. 3, a connecting member 32 is provided on the rear surface of the movable cutter 21 of each of the second cutter portions 12 so as to protrude from the movable cutter 21 of the second cutter portion 12. Two hydraulic cylinders 23B are connected. That is, similarly to the first cutter unit 11, one end of each hydraulic cylinder 23B is connected to the cutter head 2.
And the other end is connected to the connecting member 32 of the movable cutter 21.

Although not shown, each cutter unit 1
The movable cutters 21 in 1 and 12 are slidably held on the face plate 2a side of the cutter head 2 via an engaging member.

Therefore, as shown in FIG. 4, for example, when the central movable cutter 21 in the first cutter section 11 is reciprocated in the radial direction (radiation direction) as shown by an arrow a, for example, a pipe-shaped Obstacle 41 is movable cutter 2
1 and the fixed cutter 22 cut it.

Of course, the directions of the teeth of the movable cutter 21 and the fixed cutter 22 are set to face each other. By the way, the cutters in the above embodiment are arranged separately in the diametric direction and the radial direction. May be done.

Further, the cutter units 11 and 12 of the above-described embodiment are used.
In the above description, the arrangement of the cutters is described such that the movable cutter 21 is arranged at the center and the fixed cutters 22 are arranged at both sides. For example, on the contrary, the fixed cutter is arranged at the center and the movable cutters are arranged at both sides. In addition, the number of cutters arranged in each cutter unit is set to two (three are arranged in parallel in the above embodiment), and both cutters are movable cutters, and are reciprocated in opposite directions. It may be what you have.

[0019]

As described above, according to the structure of the present invention, the cutter portion is arranged on the cutter head along the radial direction, and the cutter portion is constituted by the saw-shaped movable cutter and the fixed cutter. Therefore, it is possible to cut an obstacle such as a sheet pile and the like, and it is unnecessary to remove an obstacle by an operator as in the related art, thereby improving the work efficiency of tunnel construction.

[Brief description of the drawings]

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

FIG. 2 is a front view of the shield machine in the embodiment.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a perspective view of a main part of a cutter unit in the shield machine according to the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shield main body 2 Cutter head 2a Face plate 11 1st cutter part 12 2nd cutter part 21 Movable cutter 22 Fixed cutter 23 Hydraulic cylinder 31, 32 Connecting member

Continuation of the front page (72) Inventor Shinji Kabuki 5-3-28 Nishikujo, Konohana-ku, Osaka-shi, Osaka Inside Hitachi Zosen Corporation (56) References JP-A-64-24993 (JP, A) 6-117187 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) E21D 9/08-9/10

Claims (1)

(57) [Claims] 1. A only set the cutter portion along the face plate center of the cutter head which is rotatably mounted on the front of the shield body in the radial direction, the cutter unit are configured by the plurality of serrated cutter, adjacent at least each cutter for provided a driving apparatus for one reciprocate in the radial direction and which
The direction of the teeth of the adjacent movable and fixed cutters
A shield machine that faces each other .