JP2860047B2 - Cutter swinging device for rectangular shield excavator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rectangular shield excavator and, more particularly, to a rectangular shield excavator that can easily perform sharp curves.

[0002]

2. Description of the Related Art Generally, a circular shield method and a rectangular shield method are known as shield methods for constructing tunnels such as railways, underpasses, and common trenches.

In the circular shield method, a circular shield excavator in which a disk-shaped cutter is arranged at the tip of a circular shield excavator body is used, and the ground is excavated in a circular shape with the disk-shaped cutter. A circular tunnel is formed. When performing a curve construction by this circular shield excavator, the copy cutter incorporated in the disk-shaped cutter in the radial direction is projected to the side of the disk-shaped cutter in a range corresponding to the curve to be bent, and the By excavating the side of the ground to match the curve, and pushing the shield jack halfway, the shield excavator body is bent along the curve curve. In addition, when performing sharp curve construction, if only the copy cutter is used, the amount of extra excavation increases, and it is easy to cause land subsidence due to the collapse of the face. Can be bent in the middle, so that the amount of extra dug by the copy cutter is minimized.

[0004] On the other hand, it has been recognized that the rectangular shield method is a tunnel method having a higher tunnel section advantage than the circular shield method. In this rectangular shield construction method, a rectangular shield excavator in which a cutter composed of a cutter unit having a cylindrical drum cutter is disposed at the tip of a rectangular shield excavator body, and the ground is rectangularized by the cutter. While digging, a rectangular tunnel is being excavated. When direction control is performed by the rectangular shield excavator, the excavation is performed while controlling the direction of the shield excavator body by the shield jack.

[0005]

In the rectangular shield excavator using the conventional drum cutter, since a cylindrical drum cutter is disposed in a horizontal direction to perform excavation, a vertical direction control is performed. If the shield excavator body is tilted up and down with a shield jack, it is possible to directly excavate the ground in the vertical direction with a drum cutter, but when performing a curve construction in the left and right direction, There was a problem that it was difficult to directly excavate the ground in the horizontal direction.

[0006] In the rectangular shield excavator,
Similar to the circular shield excavator, it is conceivable to provide a cutter for overmining or a bending mechanism of the shield excavator body to perform the curve construction. In the case of an excavator, the cutter is not a disk but a drum, and the cutter protrudes forward of the shield excavator body,
There was a problem that it could not fully cope with sharp curve construction.

Furthermore, if the cause bending in the shield excavator body, therefore the center-folding Re by format may become a state to have a reaction force on the segment in a state in which the shield jacks become eccentric, Ya damage segment There was also a problem that deformation easily occurred.

The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a rectangular shield excavator without causing segment damage or deformation.
An object of the present invention is to provide a rectangular shield excavator capable of easily performing a sharp curve.

[0009]

Means for Solving the Problems In the first invention,
The shield excavator includes a rectangular shield excavator body having a partition between a cutter chamber and a single or plural cutter units in which a pair of upper and lower ring cutters are arranged between a pair of left and right drum cutters. A cutter disposed in a cutter chamber at a tip end of the main body, and a gear that houses a plurality of gears that penetrate the partition and are integrated with the cutter and that transmit power to the cutter unit from the cutter driving source and the cutter driving source. comprising a case, a, in the rectangular shield excavating machine for excavating a rectangular tunnel, the Kattayuni
Can project laterally from the outer edge of the drum cutter side that constitutes the unit
And an over cutter for excavating the gear, and supporting the gear case rotatably at least in the left-right direction with respect to the partition wall, and moving the cutter at least in the left-right direction inside the shield excavator body of the gear case. It is characterized in that a moving means for moving is provided.

[0010] In the second invention, the gear case is rotatably supported by the partition via a spherical portion formed in the partition penetrating portion, and is movable in the left-right and vertical directions by the moving means. It is characterized by being rotatable.

[0011]

[0012]

According to the first aspect of the present invention, the cutter drive source in the gear case is operated, the cutter unit is rotated via a plurality of gears, and the ground is formed into a rectangular shape by the drum cutter and the ring cutter of the cutter unit. Excavate and propel.

[0013] In the case of performing a curve construction in the left-right direction, the gear case is moved right and left by moving means provided inside the shield excavator body of the gear case. Then, the cutter unit integrated with the gear case moves left and right to excavate the left or right ground.

As described above, the cutter itself swings right and left, so that it is possible to carry out the curve construction along the curve of the curve construction with a small amount of excavation, and it is possible to carry out the curve collapse and the land subsidence. It is possible to prevent occurrence.

Further, since the cutter unit rotates around the bulkhead at the front end position of the shield excavator main body, it is possible to perform a curved construction at a relatively small rotation angle. As a result, a sharp curve can be formed without using a bending mechanism. Curve construction becomes possible.

Further, since the rotation of the cutter unit and the propulsion of the shield excavator body by the shield jack are performed separately, the shield jack is always eccentric with respect to the segment and always abuts vertically. The shield jack can prevent the segment from being damaged or deformed. And furthermore,
In addition to the horizontal excavation by the
Over the outer periphery of the drum cutter side
The cutter can be used to perform left and right
This makes it easier to construct sharp curves.

According to the second aspect of the present invention, the cutter unit is rotated left and right and up and down around the spherical portion formed in the partition wall of the gear case by the moving means, so that only the left and right curves can be constructed. In addition, the vertical direction can be easily adjusted.

[0018]

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings.

1 to 5 show a rectangular shield excavator according to one embodiment of the present invention.

This rectangular shield excavator is shown in FIGS.
As shown in FIG. 1, the shield excavator body 10 includes a cutter 12 provided at a tip end of the shield excavator 10.

The shield excavator body 10 is formed in a rectangular shape having substantially the same shape as the rectangular segment 14 constituting the rectangular tunnel, and is located at the tip side of the segment 14. At the rear of the shield excavator body 10, a space is provided between the segment 14 and the tail seal 16 via a tail seal 16.

A hood 18 projects from the tip of the shield excavator body 10, and the cutter chamber 20 is attached to the tip of the shield excavator body 10 by the hood 18.
Is defined.

Further, the cutter chamber 20 defined by the hood 18 and the girder portion 22 on the rear side thereof are separated from each other by the partition wall 2.
4, the cutter chamber 20 between the partition wall 24 and the cutter 12 is filled with muddy water pressurized from a mud pipe 26 provided in the shield excavator body 10 to stabilize the ground in front of the cutter 12. Then, the excavated earth and sand is taken into the muddy water, and is transported as a muddy water through a mud discharge pipe 28.

Further, a plurality of shield jacks 30 are disposed in the shield excavator body 10, and the shield jack 30 is brought into contact with the tip of the segment 14 to propel the shield excavator body 10. . In addition,
The segment 14 is assembled by operating an erector 32 disposed in the shield excavator body 10 by an erector turning hydraulic motor 34.

The cutter 12 is composed of four cutter units 40 on the upper, lower, left and right sides.

As shown in FIG. 2, each of the cutter units 40 includes two drum cutters 42 provided on both right and left sides.
The upper and lower ring cutters 44 are disposed between the drum cutters 42.

The drum cutter 42 rotates about a shaft 46, and the ring cutter 44 rotates about a shaft 48.

The drum cutter 42 of each cutter unit 40
The ring cutter 44 is supported and integrated by each gear case 38 projecting from the inside of the shield excavator body 10 through the partition wall 24 and protruding toward the cutter chamber 20.

In each gear case 38, a cutter driving motor 36 as a cutter driving source and a drum cutter 42 of each cutter unit 40 are provided by the cutter driving motor 36.
A plurality of gears (not shown) for transmitting power to the ring cutter 44 are housed, and the drum cutter 42 and the ring cutter 44 are rotated by a cutter driving motor 36 via a gear (not shown). .

The gear cases 38 are rotatably supported in the left-right direction with respect to the partition wall 24 of the shield excavator body 10. Specifically, the partition 24
A rotating shaft 50 having a length extending between the penetrating portions of the pair of upper and lower gear cases 38 is attached to the pair of upper and lower gear cases 38 so as to be rotatable left and right.
Are mounted integrally, and the pair of upper and lower gear cases 38 can be integrally rotated in the left-right direction via the respective rotation shafts 50. In addition, between each rotating shaft 50 and the partition wall 24, a water-stop packing 52 is attached so as to prevent pressurized muddy water in the cutter chamber 20 from entering the shield excavator body 10. I have.

As shown in FIG. 3, the hydraulic pressure for swinging the cutter unit 40 is provided between the inner end of the shield excavator body 10 of each gear case 38 and the inner surface of the shield excavator body 10. By mounting the jack 54 and operating the hydraulic jack 54 to extend and contract, each cutter unit 40 is rotated in the left and right curve construction directions.

Further, as shown in FIG. 2, an overcut 56 for left and right excavation at the time of constructing a curve, which can advance and retreat to the side, is provided at the outer edge of the side surface of the drum cutter 42. .

Specifically, each of the drum cutters 42 has a plurality of reinforcing spokes 58 extending between the side surfaces inside the outer peripheral surface, and one of the spokes 58 is provided.
The hydraulic cylinder 60 accommodates a hydraulic cylinder 60 and an over-cutting cutter 56, and the hydraulic cylinder 60 allows the over-cutter 56 to move sideways from the outer peripheral edge of the side surface of the drum cutter 42. That is, one over-cutter 56 is provided for each of the drum cutters 42 of each of the cutter units 40, and a total of four over-cutters 5
6 are provided.

Next, a state of excavation using the rectangular shield excavator according to the present embodiment will be described.

First, muddy water is supplied from the mud feeding pipe 26 into the cutter chamber 20, and the four cutter driving motors 36 are operated. Then, the shaft 46 of the drum cutter 42 and the shaft 48 of the ring cutter 44 rotate through the gears in the gear case 38, whereby the drum cutter 42 and the ring cutter 44 of the upper and lower cutter units 40 rotate. And excavate the ground into a rectangular shape. In this case, stable excavation by the cutter 12 can be performed by pressurizing the muddy water into the cutter chamber 20. In addition, debris generated by excavation is discharged from the drainage pipe 28 together with muddy water.

In this state, the shield jack 30 is extended, the tip segment 14 is given a reaction force, and the shield excavator body 10 is propelled by a predetermined distance. In this case, the degree of extension of the plurality of shield jacks 30 is adjusted to move the shield excavator body 10 straight, or to change the direction in the vertical direction and propell. In the case of propelling by changing the direction in the vertical direction, the upper and lower cutter units 4
0 and the drum cutter 42 and the ring cutter 44
Is directed forward, the shield jack 30 can be used to excavate the ground in front of the traveling direction only by changing the direction of the shield excavator body 10 in the vertical direction.

When a curve is to be made in the left-right direction, as shown in FIG. 5, each hydraulic jack 54 attached to the gear case 38 is operated to operate the cutter unit 40.
Is rotated around the rotating shaft 50 in the left or right curve construction direction, and the cutter unit 40 excavates the ground in front of the curve construction direction to easily perform the curve construction.

As described above, by swinging the cutter unit 40 right and left, it is possible to perform the curve construction along the curve of the curve construction with a small amount of extra digging without using a complicated bending mechanism. And the occurrence of collapse of the face, land subsidence, and the like can be prevented.

Further, since the cutter unit 40 rotates around the partition wall 24 at the front end position of the shield excavator body 10, it is possible to perform a curved construction at a relatively small rotation angle, and it is possible to perform a sharp curved construction.

Further, since the shield jack 30 is not used for rotating the cutter unit 40, the shield jack 30 can be always brought into perpendicular contact with the segment 14, thereby preventing the segment 14 from being damaged or deformed. It is possible to do.

Further, when a sharper curve is to be formed, the overcutter 56 disposed on the outer edge of the side surface of the drum cutter 42 located on the left or right side for performing the curve is projected laterally by the hydraulic cylinder 60. If the left or right side of the ground is excavated, it is possible to easily perform a sharp curve construction. After excavating a rectangular shape by a predetermined distance by the cutter 12, the electric If the rectangular segments 14 are assembled by operating the 32, it is possible to easily construct a rectangular tunnel having a curve in the left-right direction.

The present invention is not limited to the above embodiment, and various modifications can be made within the scope of the present invention.

For example, in the above-described embodiment, the shield method of the muddy water pressurization type has been described. However, the present invention is not limited to this example, and may be applied to an earth pressure system shield method, a propulsion method, or a mountain tunnel method.

Further, in the above-described embodiment, the cutter having the four cutter units in the left and right and the upper and lower stages and the cutter having the two cutter units in the upper and lower stages are described. In addition to the case where the cutter is constituted by the above, the present invention is also applicable to the case where the cutter is constituted by variously combining a plurality of other cutter units.

Further, as a moving means for swinging the cutter,
Although a hydraulic jack is used, the invention is not limited to this example, and a motor and a gear may be used, or air pressure may be used.

Further, in each of the above-described embodiments, the case where the cutter is swung in the left-right direction is described. However, the present invention is not limited to the above-described example. In addition, the gear case is rotatably supported with respect to the partition wall, and is rotatable left and right or left and right and up and down by moving means, so that excavation in the vertical direction can be performed in addition to right and left curve construction. It is also possible.

[0048]

As described above, according to the first aspect of the present invention, the cutter performs the curve construction along the curve of the curve construction with a small amount of excavation by swinging the cutter itself right and left. Therefore, it is possible to prevent the collapse of the face and the occurrence of land subsidence.

Further, since the cutter unit rotates around the bulkhead at the front end position of the shield excavator main body, it is possible to perform a curved construction at a relatively small rotation angle. As a result, a sharp curve can be formed without using a bending mechanism. There is an effect that curve construction can be performed. In addition, the cutter unit
In addition to excavation, drum cutters that make up the cutter unit
The over cutter on the outer periphery of the side
By digging, even sharper curves
This has the effect of facilitating construction.

Furthermore, since the rotation of the cutter unit and the propulsion of the shield excavator body by the shield jack are performed separately, the shield jack is always eccentric with respect to the segment and always abuts vertically. In addition, there is an effect that the damage and deformation of the segment can be prevented by the shield jack.

According to the second aspect of the present invention, the cutter unit is rotated left and right and up and down around the spherical portion formed in the partition wall penetrating portion of the gear case by the moving means, so that only the left and right curves can be formed. In addition, there is an effect that the vertical direction can be easily adjusted.

[0052]

[Brief description of the drawings]

FIG. 1 is a sectional view of a rectangular shield excavator according to one embodiment of the present invention.

FIG. 2 is a cross-sectional view of the rectangular shield excavator of FIG. 1 viewed from the cutter unit side with the right cutter unit omitted.

FIG. 3 is a cross-sectional view of a gear case portion as viewed from inside a shield excavator body.

FIG. 4 is a cross-sectional view showing a state at the time of straight line construction in the present embodiment.

FIG. 5 is a cross-sectional view showing a state at the time of constructing a curve in the present embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Shield excavator main body 12, 62 cutter 20 cutter chamber 24 partition wall 36 cutter drive electric motor 38, 64 gear case 40 cutter unit 42 drum cutter 44 ring cutter 54 hydraulic jack 56 over cutter

────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Toru Taniguchi 1-7-1 Kyobashi, Chuo-ku, Tokyo Toda Construction Co., Ltd. (72) Inventor Masahiro Nakagawa 1-1-7-1 Kyobashi, Chuo-ku, Tokyo Toda Construction Inside the Company (72) Inventor Yuji Tategawa 1-7-1 Kyobashi, Chuo-ku, Tokyo Toda Construction Co., Ltd. (72) Inventor Makoto Enkawa 1-7-1, Kyobashi, Chuo-ku, Tokyo Toda Construction Co., Ltd. (72) Inventor Yoshiaki Doi 1 Yawata Kaigandori, Ichihara-shi, Chiba Mitsui Engineering & Shipbuilding Co., Ltd. Chiba Works (56) References JP-A-2-66295 (JP, A) JP-A-4-131494 (JP) , A) (58) Field surveyed (Int. Cl. ⁶ , DB name) E21D 9/08

Claims (2)

(57) [Claims] 1. A rectangular shield excavator body having a partition between a cutter chamber and a partition wall, and a single or plural cutter units having a pair of upper and lower ring cutters disposed between a pair of left and right drum cutters. A cutter disposed in a cutter chamber at the tip of the shield excavator body, a plurality of cutters penetrating the partition wall, being integrated with the cutter, and transmitting power from the cutter drive source and the cutter drive source to the cutter unit. A gear case for accommodating a gear; and a rectangular shield excavator for excavating a rectangular tunnel, wherein a drum cutter side outer edge constituting the cutter unit is provided.
Has an overcut for excavation that can protrude to the side
Rutotomoni, said the provided moving means for moving the gear case is rotatably supported in at least the lateral direction, and the cutter to the shield excavator body inside of the gear case at least in lateral direction with respect to the partition wall Oscillating device for a rectangular shield excavator. 2. The gear case according to claim 1, wherein the gear case is rotatably supported by the partition via a spherical portion formed in the partition penetrating portion, and is rotatable left and right and up and down by the moving means. A cutter swinging device for a rectangular shield excavator, characterized in that: