JPH11303581A - Swing cutter mechanism of shield machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent occurrence of consolidation and solidification of digged earth and sand in a space between a swing jack for normal rotation and a swing jack for reverse rotation. SOLUTION: A swing cutter 18a for normal rotation and a swing cutter 18b for reverse rotation are provided on outer periphery of a main cutter capable of rotating normally and reversely so as to open and close freely, a swing jack 17a for normal rotation which opens, closes, and drives the swing cutter 18a for normal rotation is provided, a swing jack 17b for reverse rotation which opens, closes, and drives the swing cutter 18a for reverse rotation is provided, and a filler port 41 for an earth and sand fluidity adjusting material is provided in a space 21 between the swing jacks 17a and 17b. By pouring the earth and sand fluidity adjusting material into the space 21 between the swing jacks 17a and 17b, the digged earth and sand are not collected in the space 21, and the consolidation and solidification of the digged earth and sand to not occur in the space 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a swing cutter mechanism for a shield machine for excavating an irregular cross section.

[0002]

2. Description of the Related Art In recent years, tunnels having a special section (irregular section) such as a rectangle, an ellipse, an egg, and a horseshoe have been constructed. Tunnel of irregular cross section is used for a wide range of applications because of less dimensional restrictions on internal structures.

When a tunnel having an irregular cross section is constructed, a shield machine provided with a swing cutter which can be opened and closed on the outer periphery of a circular main cutter is used, and the swing cutter is opened at a predetermined rotation position of the main cutter to excavate the irregular section. It is supposed to do. Swing cutters for forward and reverse rotation are provided according to the direction of rotation of the main cutter.Opening and closing of each swing cutter is performed by expansion and contraction driving of a trunnion type swing jack, and the swing jack itself swings with opening and closing of the swing cutter. It works.

[0004]

SUMMARY OF THE INVENTION Conventional shield machines are:
Opening and closing of the swing cutter during excavation causes repeated swinging of the swing jack, and the swing jack on the opposite side is fixed according to the direction of rotation of the main cutter. Is changing. For this reason, excavated soil accumulates in the space between the swing jacks, and consolidation and consolidation tend to occur in the excavated soil. If consolidation or consolidation of the excavated earth and sand occurs in the space between the swing jacks, the expansion and contraction (oscillation) of the swing jacks becomes impossible, and the swing cutter cannot close inside the outer diameter of the main cutter, and the desired excavation cross section is not obtained. There was a possibility that it could not be obtained.

The present invention has been made in view of the above circumstances, and has as its object to provide a swing cutter mechanism of a shield machine in which there is no possibility that consolidation or consolidation of excavated earth and sand will occur in the space of a swing jack.

[0006]

In order to achieve the above object, according to the first aspect of the present invention, a circular main cutter is provided on a main body of the shield machine so as to be rotatable forward and backward, and a swing for forward rotation is provided on an outer periphery of the main cutter. A cutter and a swing cutter for reverse rotation are openably and closably provided, and a swing jack for forward rotation for opening and closing the swing cutter for forward rotation is provided, and a reverse rotation for opening and closing the swing cutter for reverse rotation is provided. Is provided, and an injection port of a sediment flow rate adjusting material is provided in a space between the swing jack for normal rotation and the swing jack for reverse rotation.

In order to achieve the above object, according to the second aspect of the present invention, a circular main cutter is provided on the main body of the shield machine so as to be rotatable forward and backward, and a swing cutter for forward rotation and a reverse rotation are provided on an outer periphery of the main cutter. Swing cutter for opening and closing freely, and providing a swing jack for forward rotation for opening and closing the swing cutter for forward rotation and a swing jack for reverse rotation for opening and closing the swing cutter for reverse rotation. An elastic body is fixed over the swing jack for forward rotation and the swing jack for reverse rotation.

[0008]

FIG. 1 is a cross-sectional view of a main part of a shield machine having a swing cutter mechanism according to a first embodiment of the present invention. FIG. The operation of the swing cutter is described, FIG. 4 shows an enlarged state of an arrow IV in FIG. 1, and FIG. 5 shows a piping state of the additive.

The configuration of the shield machine will be described. 1 and 2
As shown in FIG. 1, an annular member 2 is rotatably supported at the front end of a shield machine main body 1 having a substantially rectangular cross section via a rotary bearing 3, and a large gear 4 is provided on the inner periphery of the rotary bearing 3. I have. A drive motor 5 is provided on the shield machine main body 1, and a drive pinion 6 is provided on an output shaft of the drive motor 5. The drive pinion 6 meshes with the large gear 4, and the driving member 5 drives and rotates the annular member 2 via the drive pinion 6 and the large gear 4 (the rotary bearing 3).

A circular main cutter 8 is fixed to the annular member 2 via an intermediate support member 7, and a cutter bit 9 is attached to a front surface of the main cutter 8. Ring member 2
A central cylindrical member 1 through an intermediate support member 10
1 is fixed, and a fishtail 12 for excavating a central portion is provided at a front end of the central cylindrical member 11. Further, a protective iron plate 14 is fixed to the annular member 2 via an intermediate support member 13.

On the other hand, a swing jack 17 is provided at a portion corresponding to the protective iron plate 14, and the swing jack 17 is provided.
Supports a swing cutter 18. The swing cutter 18 is supported on the shield machine body 1 side via a swing pin 32 supported by the boss 14a of the protective iron plate 14 and the boss 13a of the intermediate support member 13 so as to be openable and closable.

The driving rod 19 of the swing jack 17 is supported by the central cylindrical member 11 by a pair of pivots 20 and bearings 11a extending to both sides, and the main body 9 of the swing jack 17 is provided.
1 is connected to the swing cutter 18 via a pin 22. That is, the swing jack 17 is a trunnion-type cylinder, and when the drive rod 19 is extended by driving the swing jack 17, the swing cutter 18 is opened to the outside of the main cutter 8, and the drive rod 19
Is retracted, the swing cutter 18 is pulled inside the main cutter 8 to be in a closed state.

As shown in FIGS. 2 and 3, the swing cutter 18 includes a swing cutter 18a for right rotation (for normal rotation) and a swing cutter 18b for left rotation (for reverse rotation). The swing cutter 18a and the swing cutter 18b are driven to open and close by driving a swing jack 17a for right rotation (for normal rotation) and a swing jack 17b for left rotation (for reverse rotation), respectively. 2 and 3, when the main cutter 8 is rotating clockwise (rotating clockwise from the rear of the shield machine body 1 to the main cutter 8: counterclockwise in the drawing), the swing cutter 18a for clockwise rotation is used. Are opened and closed, and the swing cutter 18b for left rotation is drawn into the inside of the main cutter 8 and is closed. When the main cutter 8 is rotating counterclockwise (clockwise in the drawing), the swing cutter 18b for left rotation opens and closes, and the swing cutter 18a for right rotation is drawn inside the main cutter 8 and closed. Become.

A rotary joint 15 is connected to the rear end of the central cylindrical member 11. The rotary joint 15 is provided with a rotation detecting device 16 for detecting the rotation angle of the central cylindrical member 11, that is, the rotation angle of the main cutter 8. ing. The rotary joint 15 is provided with hydraulic piping 20a, 20b,
The hydraulic piping 20a, 20b is connected to a supply / discharge port in the trunnion of the swing jack 17.

The rotation detecting device 16 detects the rotation angle of the main cutter 8, drives the swing jack 17 at a predetermined angle so as to have a pre-calculated stroke, and opens and closes the swing cutter 18 as needed to obtain an irregular shape. Drilling.

Reference numeral 31 in the drawing denotes a screw conveyor for discharging excavated earth and sand.

On the other hand, the swinging of the swinging jack 17 during the excavation causes the swinging of the swinging jack 17 to be repeated, and the swinging jack 17 on the opposite side is fixed according to the rotation direction of the main cutter 8. . For this reason, the shape of the space 21 between the swing jacks 17 (between the swing jacks 17a and 17b) always changes, and
The situation is such that consolidation and consolidation of excavated earth and sand are liable to occur within. Therefore, a viscosity-imparting material or a fluidity-adding material is injected into the space 21 as a sediment flow adjusting material to increase the viscosity of the excavated sediment so that the excavated sediment is not compacted or consolidated in the space 21.

That is, as shown in FIG. 3 and FIG.
In one place between the swing jacks 17a and 17b
1 is provided so that a viscosity-imparting material or a fluidity-adding material is sent to the injection port 41 through the injection pipe 42. The injection pipe 42 and the injection port 41 have three sets of swing jacks 17a,
One is provided between 17b. As shown in FIG. 5, an opening / closing valve 43 is provided in each injection pipe 42, and a viscosity-imparting material and a flowable additive are pressure-fed to each injection pipe 42 from three injection pumps 44 via the rotary joint 15. You. When the viscosity-imparting material and the fluidity-adding material are pressure-fed from the injection pump 44 to each of the injection tubes 42, the viscosity-imparting material and the fluidity-additive are discharged from the injection port 41 to the space 21 between the swing jacks 17a and 17b. .

The operation of the swing cutter mechanism of the shield machine having the above configuration will be described.

The drive motor 5 drives the drive pinion 6
Then, the annular member 2 is rotated via the large gear 4 (the rotary bearing 3), and a hole having a circular cross section is excavated by the main cutter 8.
The rotation angle of the annular member 2, that is, the rotation angle of the main cutter 8, is detected by the rotation detection device 16, and the swing jack 17 is driven at a predetermined rotation angle. Swing jack 17
Is calculated in advance based on the rotation angle (rotation direction) of the main cutter 8, and a predetermined swing cutter 18 is appropriately opened and closed by driving the swing jack 17. By synchronizing the rotation of the main cutter 8 and the opening and closing of the swing cutter 18, a shape other than a circle can be excavated at a predetermined position. As a result, a hole having an irregular cross section is excavated.

At the time of excavation, a viscosity-imparting material or a flowable additive is discharged from the injection port 41 into the space 21 between the swing jacks 17a and 17b so that the excavated earth and sand do not accumulate in the space 21. As a result, consolidation and consolidation of the excavated earth and sand do not occur in the space 21, and expansion and contraction (swing) of the swing jack 17 is not hindered. For this reason, the closing operation of the swing cutter 18 is reliably performed, and a prescribed (desired) excavation section can always be obtained.

In the above embodiment, the viscosity-imparting material and the fluidity-adding material are discharged from the inlet 41.
In the case of clay or the like having high viscosity of excavated earth and sand, consolidation and consolidation of excavated earth and sand are prevented by using water or a viscosity reducing material.

A second embodiment of the present invention will be described with reference to FIGS. 6 and 7 show a front view of a main part of a shield machine having a swing cutter mechanism according to a second embodiment of the present invention, and FIG. 8 shows a view taken along line VIII-VIII in FIG. Note that the same members as those shown in FIGS. 1 to 5 are denoted by the same reference numerals, and redundant description is omitted.

The swing cutter mechanism of the shield machine according to the second embodiment has a structure in which a space 21 between a swing jack 17a for right rotation and a swing jack 17b for left rotation is provided.
The elastic body 51 is fixed over the outer cylinder of the swing jack 17a for right rotation and the outer cylinder of the swing jack 17b for left rotation. FIG. 6 shows a swing jack 17a for right rotation.
FIG. 7 shows a state in which the right-hand swing cutter 18a and the left-hand swing cutter 18b are closed.

The shape of the space 21 is changed by opening and closing the swing cutters 18a and 18b.
Since the outer cylinder of 17a and the outer cylinder of the swing jack 17b for counterclockwise rotation are connected by the elastic body 51, the shape of the elastic body 51 changes according to the change of the shape of the space 21. The elastic body 51 is always present.

The elastic body 5 is provided in a space 21 between the swing jack 17a for right rotation and the swing jack 17b for left rotation.
Due to the presence of 1, there is no room for excavated earth and sand to enter, and the excavated earth and sand does not collect in the space 21. As a result, consolidation and consolidation of the excavated earth and sand do not occur in the space 21, and expansion and contraction (swing) of the swing jack 17 is not hindered. For this reason, the closing operation of the swing cutter 18 is reliably performed, and a prescribed (desired) excavation section can always be obtained.

[0027]

According to the first aspect of the present invention, there is provided a swing cutter mechanism for a shield machine, wherein a circular main cutter is provided on a shield machine main body so as to be rotatable forward and backward, and a swing cutter for normal rotation and a reverse cutter for reverse rotation are provided on an outer periphery of the main cutter. A swing cutter is provided so as to be openable and closable, and a forward rotation swing jack for opening and closing the forward rotation swing cutter is provided and a reverse rotation swing jack for opening and closing the reverse rotation swing cutter is provided. Since the injection port of the sediment flow rate adjusting material is provided in the space between the swing jack for the forward rotation and the swing jack for the reverse rotation, the space between the swing jack for the forward rotation and the swing jack for the reverse rotation. By injecting the sediment flow adjusting material into the space, the excavated earth and sand does not collect in the space, and there is no possibility that the excavated earth and sand will be compacted or consolidated. As a result, the operation of the swing jack is not hindered, the closing operation of the swing cutter is reliably performed, and a desired excavation section can always be obtained.

According to a second aspect of the present invention, there is provided a swing cutter mechanism for a shield machine, wherein a circular main cutter is provided on the shield machine main body so as to be rotatable forward and reverse, and a swing cutter for forward rotation and a reverse cutter for reverse rotation are provided on the outer periphery of the main cutter. A swing cutter is provided so as to be openable and closable, and a forward rotation swing jack for opening and closing the forward rotation swing cutter is provided and a reverse rotation swing jack for opening and closing the reverse rotation swing cutter is provided. Since the elastic body is fixed between the swing jack for the forward rotation and the swing jack for the reverse rotation, the penetration of the excavated earth and sand into the space between the swing jack for the forward rotation and the swing jack for the reverse rotation is elastic. Blocked by the body, the excavated earth and sand does not accumulate in the space, and there is no possibility that the excavated earth and sand will be compacted or consolidated. As a result, the operation of the swing jack is not hindered, the closing operation of the swing cutter is reliably performed, and a desired excavation section can always be obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a shield machine provided with a swing cutter mechanism according to a first embodiment of the present invention.

FIG. 2 is a view taken in the direction of the arrow II in FIG.

FIG. 3 is an explanatory diagram of an operation state of a swing cutter.

FIG. 4 is an enlarged view of an arrow IV part in FIG. 1;

FIG. 5 is an explanatory diagram of a piping situation of an additive.

FIG. 6 is a front view of a main part of a shield machine including a swing cutter mechanism according to a second embodiment of the present invention.

FIG. 7 is a front view of a main part of a shield machine provided with a swing cutter mechanism according to a second embodiment of the present invention.

8 is a view taken along line VIII-VIII in FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shield machine main body 2 Ring member 3 Rotation bearing 4 Large gear 5 Drive motor 6 Drive pinion 7 Intermediate support member 8 Main cutter 9 Cutter bit 10 Intermediate support member 11 Intermediate cylindrical member 12 Fish tail 13 Intermediate support member 14 Protection iron plate 15 Rotary Joint 16 Rotation detecting device 17 Swing jack 18 Swing cutter 19 Drive rod 20a, 20b Hydraulic piping 21 Space 41 Inlet 42 Injection pipe 43 On-off valve 44 Injection pump 51 Elastic body

 ──────────────────────────────────────────────────続 き Continuation of the front page (71) Applicant 390036515 Konoike Gumi Co., Ltd. 4-55, Kobana-ku, Osaka-shi, Osaka (71) Applicant 000006655 Nippon Steel Corporation 2-6-Otemachi, Chiyoda-ku, Tokyo No. 3 (71) Applicant 000206211 Taisei Corporation 1-25-1, Nishi Shinjuku, Shinjuku-ku, Tokyo (71) Applicant 000219875 Tokyu Construction Co., Ltd. 1-16-1 Shibuya, Shibuya-ku, Tokyo (71) Application 000150110 Takenaka Civil Engineering Co., Ltd. 8-21-1, Ginza, Chuo-ku, Tokyo (71) Applicant 000006208 Mitsubishi Heavy Industries, Ltd. 2-5-1 Marunouchi, Chiyoda-ku, Tokyo (72) Inventor Koji Oyama Mizuho, Nagoya-shi, Aichi 2-72 Kidamachi, Ward Nagoya National Highway Construction Office, Chubu Regional Construction Bureau, Ministry of Construction (72) Inventor Yuichi Toya 2-chome Otsuka 2-chome, Bunkyo-ku, Tokyo No. 72, Innovative Construction Technology Center (72) Inventor Yoshihisa Kinoshita 2-3, Kandajicho, Chiyoda-ku, Tokyo Obayashi Corporation Tokyo Head Office (72) Inventor Shotaro Oizumi 2-3-11 Kanda Surugadai, Chiyoda-ku, Tokyo No. Konoike-Gumi Co., Ltd. No. 1 Taisei Construction Co., Ltd. (72) Inventor Toshimi Ino 1-25-1, Nishishinjuku, Shinjuku-ku, Tokyo Taisei Construction Co., Ltd. (72) Inventor Hisao Ito 1-16-14, Shibuya, Shibuya-ku, Tokyo Tokyu Construction Co., Ltd. (72) Inventor Yoshifumi Fujii 8-2-1-1, Ginza, Chuo-ku, Tokyo Co., Ltd.Takenaka Civil Engineering Co., Ltd. (72) Inventor Takao Matsumoto 1-1-1 Wadazakicho, Hyogo-ku, Kobe-shi, Hyogo Prefecture No. 1 Inside Kobe Shipyard, Mitsubishi Heavy Industries, Ltd. (72) Inventor Koji Yamazaki Wa, Hyogo-ku, Kobe Sakimachi chome No. 1 in the No. 1 Mitsubishi Heavy Industries, Ltd. Kobe Shipyard & Machinery Works

Claims (2)

[Claims] 1. A circular main cutter is provided on a shield machine main body so as to be freely rotatable forward and backward, and a swing cutter for forward rotation and a swing cutter for reverse rotation are provided on the outer periphery of the main cutter so as to be freely opened and closed. A swing jack for forward rotation for opening and closing the swing cutter is provided, and a swing jack for reverse rotation for opening and closing the swing cutter for reverse rotation is provided.The swing jack for forward rotation and the swing jack for reverse rotation are provided. A swing cutter mechanism for a shield machine, wherein an inlet for a sediment flow control material is provided in a space between the swing jack and the swing jack. 2. A circular main cutter is provided on a shield machine main body so as to be freely rotatable forward and backward, and a swing cutter for forward rotation and a swing cutter for reverse rotation are provided on the outer periphery of the main cutter so as to be freely opened and closed. A swing jack for forward rotation for opening and closing the swing cutter is provided, and a swing jack for reverse rotation for opening and closing the swing cutter for reverse rotation is provided.The swing jack for forward rotation and the swing jack for reverse rotation are provided. The swing cutter mechanism of the shield machine, characterized in that the elastic body is fixed across the swing jack.