JP2941776B1 - Additive distribution device for shield machine with irregular cross section - Google Patents

Abstract

The present invention provides an additive distributing device for a shield machine which can secure a space inside the machine and does not increase the size of subsequent equipment even if a large number of inlets for the soil fluidity adjusting material are provided. SOLUTION: A large number of inlets 21 are provided from two pumps 41.
A branch pipe 42 is provided to each of the branch pipes 42 and an automatic switching valve 43 is provided in each of the branch pipes 42 to construct pipes for the soil fluidity control material to a number of the inlets 21. The required amount of the soil fluidity adjusting material is supplied to the necessary injection port 21 by the pump 41 to secure a space inside the shield machine and reduce the size of subsequent equipment.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an additive distributing apparatus for a profile shield machine for drilling a profile.

[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 to be constructed, a shield machine having an irregular cross section provided with a swing cutter that can be freely opened and closed on the outer periphery of a circular main cutter is used. The swing cutter is opened at a predetermined rotation position of the main cutter to form the irregular section. Excavation is to be performed. During excavation, in order to improve the fluidity of excavated earth and sand, a soil fluidity adjusting material (additive) is injected. Injection of the additive is performed from an injection port provided on the front surface of the main body of the shield machine having an irregular cross section.

[0004] The additive material injected from the injection port is stirred by the rotation of the main cutter and the opening and closing of the swing cutter, and is mixed with the excavated earth and sand. Since the main cutter is constantly rotating, the additive at the portion of the main cutter is efficiently stirred, but the additive at the rear of the swing cutter outside the outer periphery of the main cutter cannot be sufficiently stirred. For this reason, a large number of injection ports are provided at the opening and closing portions of the swing cutter, and the additive is injected efficiently.

[0005]

In the conventional shield machine having a modified cross section, a large number of injection ports for the additive material are provided in order to efficiently mix the additive material and excavated earth and sand. For this reason, a large number of pumps, pipes, and the like for pumping the additive are required, which makes it difficult to secure a space inside the machine, and causes a problem that the subsequent equipment becomes large.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and even if a large number of inlets for soil fluidity adjusting material are provided, a space inside the machine can be secured and the subsequent equipment does not become large in size. It is an object of the present invention to provide an additive distribution device.

In order to achieve the above object, a construction of the present invention is as follows. A circular main cutter is rotatably provided on a shield machine main body, and a swing cutter is provided on an outer periphery of the main cutter so as to be openable and closable. in the modified cross section shield machine provided with a number of inlet sediment fluidity adjusting material, a branch pipe branched into the plurality of inlet from one or a plurality of pumps provided, the rotation of the main cutter及
Automatically according to the opening and closing timing of the swing cutter
An automatic switching valve that opens and closes is provided in each of the branch pipes, and pipes for the soil fluidity adjusting material to the plurality of injection ports are constructed.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a cross-sectional view of a main part of an additive distributing apparatus of a modified cross-section shield machine according to an embodiment of the present invention.
FIG. 2 shows a view taken along the arrow II in FIG. 1, and FIG. 3 shows a piping state of the additive.

The construction of the shield machine with a modified cross section will be described. As shown in FIGS. 1 and 2, an annular member 2 is rotatably supported at the front end of a shield machine body 1 having a substantially rectangular cross section via a rotary bearing 3, and a large gear is provided on the inner periphery of the rotary bearing 3. 4 are provided. 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 FIG. 2, a swing cutter 18 is provided.
Is provided with three sets of a swing cutter 18a for right rotation and a swing cutter 18b for left rotation. The state shown in FIG. 2 is that 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 on the paper), the swing cutter 18a for clockwise rotation.
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, during excavation, in order to improve the fluidity of the excavated earth and sand, an earth and sand fluidity adjusting material (additive material) is injected from a large number of injection ports 21 opened in the front surface of the shield machine body 1.
The injected additive is stirred by the rotation of the main cutter 8 and the opening and closing of the swing cutter 18, and is mixed with the excavated earth and sand. Since the stirring of the part of the swing cutter 18 tends to be insufficient, a large number of injection ports 21 are provided. Additives are supplied to the inlet 21 by the piping system shown in FIG.

A piping system for the additive will be described. As shown in FIG. 3, a branch pipe 42 is provided branching from two (a plurality of) pumps 41, and the branch pipe 42 has a large number of inlets 21.
Is connected to An automatic switching valve 43 is provided in each of the branch pipes 42, and the automatic switching valve 43 automatically opens and closes in synchronization with the injection port 21 requiring an additive. The number of pumps 41 and the number of branch pipes 42 are determined according to the capacity of the pump 41 and the required discharge amount from each inlet 21, and by adjusting the number of pumps 41 and the number of branch pipes 42, the amount of additive The discharge amount can be adjusted.

The operation of the additive distributing device of the shield machine having the above-mentioned structure 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, the additive material is discharged from the inlet 21 and the rotation of the main cutter 8 and the swing cutter 18
Is stirred and mixed with the excavated earth and sand. The space 33 deviated from the main cutter 8 (the part of the swing cutter 18: see the hatched portion in FIG. 1) is a part which cannot originally sufficiently agitate the excavated earth and sand, but since many injection ports 21 are provided, the additive material is not provided. The additive is sufficiently discharged, and a necessary amount of the additive is discharged into the space 33. The supply of the additive is performed by automatically opening and closing the automatic switching valve 43 according to the timing of the rotation of the main cutter 8 and the opening and closing of the swing cutter 18, from the necessary inlet 21 through the two branch pipes 42 from the two pumps 41. The necessary amount of additive is discharged.

Accordingly, the additive is supplied from a necessary one of the many inlets 21 through the automatic switching valve 43 by driving the two pumps 41. Equipment can be minimized. For this reason, space inside the shield machine is secured,
Subsequent equipment can be reduced in size, and the automatic switching valve 43
Automatic opening and closing facilitates the operation of supplying the additive.

[0023]

According to the present invention, there is provided an additive dispensing device for a shield machine having a modified cross section, wherein a main cutter having a circular shape is rotatably provided on a main body of the shield machine, and a swing cutter is provided on an outer periphery of the main cutter so as to be freely opened and closed. In a shield machine having a deformed cross section in which a large number of injection ports for soil fluidity control material are provided on the front surface of the main body, a branch pipe is provided for branching from one or a plurality of pumps to the plurality of injection ports, and each of the branch pipes is automatically switched. Valves were provided to construct the piping for the soil fluidity control material to the multiple inlets, so that one
The required amount of the earth and sand fluidity adjusting material can be supplied to a required inlet by one or a plurality of pumps. As a result,
It is possible to secure the space inside the shield machine and reduce the size of subsequent equipment. In addition, the automatic switching valve can automate the injection amount, injection timing, and the like of the earth and sand fluidity adjusting material, thereby simplifying the injection operation.

Therefore, even if a large number of inlets for the soil fluidity adjusting material are provided, it is possible to secure an internal space and to provide an additive dispensing device for a shield machine having a deformed cross section without increasing the size of subsequent equipment. Become.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of an additive distributing device of a shield machine having a modified cross section according to an 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 a piping state of an additive.

[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 Inlet

Continued on the front page (73) Patent holder 000006655 Nippon Steel Corporation 2-3-6 Otemachi, Chiyoda-ku, Tokyo (73) Patent holder 000206211 Taisei Corporation 1--25 Nishishinjuku, Shinjuku-ku, Tokyo No. 1 (73) Patent holder 000219875 Tokyu Construction Co., Ltd. 1-16-14 Shibuya, Shibuya-ku, Tokyo (73) Patent holder 000150110 Takenaka Civil Engineering Co., Ltd. 8-2-1-1, Ginza, Chuo-ku, Tokyo (73) Patent Authority 000006208 Mitsubishi Heavy Industries, Ltd. 2-5-1 Marunouchi, Chiyoda-ku, Tokyo (72) Koji Oyama 2--30, Kida-cho, Mizuho-ku, Nagoya-shi, Aichi Pref. Inventor Yuichi Toya 2- 15-6 Otsuka, Bunkyo-ku, Tokyo Inside the Advanced Construction Technology Center (72) Inventor Yoshihisa Kinoshita 2-3 Obayashi Gumi Tokyo Head Office, 2-3 in Kandajimachi, Chiyoda-ku, Tokyo (72) Inventor Shotaro Oizumi 2-3-3 Kanda Surugadai, Chiyoda-ku, Tokyo No. 11 Konoike Gumi Co., Ltd. 25-1, Daisei Construction Co., Ltd. (72) Inventor Toshimi Ino 25-1, 1-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo Tokyo, Japan (72) Inventor Hisao Ito 1-116, Shibuya, Shibuya-ku, Tokyo No. 14 Tokyu Construction Co., Ltd. No. 1 Mitsubishi Heavy Industries, Ltd.Kobe Shipyard (72) Inventor Koji Yamazaki 1-1-1, Wadazakicho, Hyogo-ku, Kobe-shi, Hyogo Prefecture Mitsubishi Heavy Industries, Ltd.Kobe Shipyard (56) References JP10 -280873 (JP, A) JP 1-52558 (JP, B2) JP 6-94782 (JP, B2) JP 6-105033 (J (P, B2) (58) Field surveyed (Int. Cl. ⁶ , DB name) E21D 9/06 301 E21D 9/08

Claims (1)

(57) [Claims] 1. A shield main body is provided with a circular main cutter rotatably provided on a main body thereof, a swing cutter is provided on an outer periphery of the main cutter so as to be openable and closable, and a large number of inlets for soil fluidity adjusting material are provided on a front surface of the main body of the shield machine. A branch pipe for branching from one or a plurality of pumps to the plurality of inlets, wherein the main cutter is provided;
Rotation and the opening and closing timing of the swing cutter.
Automatically switching valves for automatically opening and closing the pipes in the branch pipes, respectively, to construct pipes for the soil fluidity adjusting material to the plurality of injection ports. apparatus.