JPH0434238Y2 - - Google Patents

Description

[Detailed description of the invention] ``Field of industrial application'' This invention relates to an improvement of a shield excavator in which a bulkhead is provided at the front of the shield machine body, and a screw conveyor is arranged through the bulkhead. It is.

[Prior Art] Conventionally, this type of shield excavator has a screw conveyor fixed to the main body of the shield machine via a partition wall.

``Problem that the invention attempts to solve'' However, when excavating in a curved section, conventional shield excavators of this type follow the change in the attitude of the shield machine body, and the excavated soil discharge port at the rear of the screw conveyor does not move properly. If the shield machine body is eccentric from its position and pitching or rolling occurs, the position of the discharge port of the screw conveyor will rotate or the height will change. Therefore,
This has the drawback that the screw conveyor and the shedding device are inconveniently connected, and it is not possible to carry out smooth shedding work.

This drawback can be improved to some extent by shortening the length of the screw conveyor, and in recent shield excavators, the length of the screw conveyor is set to the minimum, but this By shortening the Yukon conveyor, the distance between the bulkhead and the large shearing device installed behind it (especially the large shearing device that houses the crusher) becomes smaller, making it easier to use the space for lining work such as segment assembly. This resulted in the disadvantage that it became narrower.

``Purpose'' Therefore, the present invention was developed to solve the above-mentioned drawbacks. Even if the attitude of the shield machine body changes, the displacement of the discharge port at the rear end of the screw conveyor is prevented, and smooth removal work is always possible. The object of the present invention is to provide a shield excavator which can be used for lining work in the rear part of the shield machine main body in a wide and effective manner by setting the length of the screw conveyor to be sufficiently long.

In addition, the longer the length of the screw conveyor, the more likely it is to bend due to vibrations, and vibrations tend to prevent smooth operation. The object of the present invention is to provide a shield excavator that prevents the screw from affecting the screw conveyor side.

``Means for Solving the Problems'' In line with the above-mentioned purpose, the structure of the present invention, whose gist is the scope of the above-mentioned utility model registration claims, is to provide a bulkhead at the front of the shield machine body 1 in order to solve the above-mentioned problems. 2 is provided, and a screw conveyor 3 is inserted through this partition wall.
In the shield tunneling machine, a flexible support ring 4 whose inner peripheral surface is a spherical seat is fixed to the center of the partition wall 2, and the flexible support ring 4 is fixed to the outer peripheral surface of the cylinder 3a of the screw conveyor 3. 4, and the rear end of the cylinder 3a of the screw conveyor 3 that protrudes rearward from the shield machine main body 1 is placed on the existing segment S.
A scraper 16 is placed on a pedestal 18 mounted on a pedestal 7, and a crusher 16 is housed on a second cart or a second sled 17a arranged on a segment S behind the pedestal 18. A flexible tube 19 connects the rear end discharge port 3b of the screw conveyor 3 to the muddy water inlet 12 of the slurry removing device 6.
Further, the above-mentioned pedestal 18 and the shedding device 6 are connected by a link rod 24.

``Function'' Therefore, in the shield excavator of the present invention, the screw conveyor 3 is freely supported by the shield machine main body 1 via the partition wall 2 by the universal support ring 4 and the outer peripheral spherical ring 5, and the shield machine main body 1 is The rear end discharge port 3b of the screw conveyor 3 can be maintained at a predetermined position even if the screw conveyor 3 is displaced to some extent.

In addition, the shield excavator of the present invention has a cylinder 3a.
Since the rear end is placed on a pedestal 18 mounted on a cart or sled 17 placed on the existing segment S, there is no holding device for the cylinder 3a inside the shield machine body 1. This provides the effect of securing lining work space within the narrow shield machine body 1.

Furthermore, in the present invention, the rear end of the cylinder 3a is placed on a cradle 18 mounted on a cart or sled 17 placed on the existing segment S, and the rear end of the cylinder 3a is placed on the segment S behind the pedestal 18. The crusher 16 is placed on the second cart or the second sled 17a.
Since the sludge removing device 6 is installed, the vibration of the sludge removing device 6 is not directly transmitted to the pedestal 18, and the rear end discharge port 3b of the screw conveyor 3 and the sludge removing device 6 are mounted. Since the slurry inlet 12 is connected to the muddy water inlet 12 of the
The vibration is not directly transmitted to the cylinder 3a.

``Example'' Next, an example of the present invention will be described below with reference to the accompanying drawings.

In the figure, 1 is the shield machine body, and a bulkhead 2 is arranged at the front of this shield machine body 1, dividing it into a chamber A at the front and an atmospheric space B at the rear. A cutter disk 8 rotated by a drive source 7 is disposed, and is further disposed in the partition wall 2 so as to pass through the front portions of the screw conveyor 3 and the slurry feeding pipe 9, as in the conventional case. .

A flexible support ring 4 whose inner peripheral surface is a spherical seat is fixed to the center of the partition wall 2, and an outer peripheral spherical ring fitted into the flexible support ring 4 is attached to the outer peripheral surface of the cylinder 3a of the screw conveyor 3. 5 is fixed.

That is, a flexible support ring 4 whose inner peripheral surface is a spherical seat is fixed to the center of the partition wall 2, while a cylinder 3a that is fitted into the flexible support ring 4 is attached to the outer peripheral surface of the cylinder 3a of the screw conveyor 3. An outer spherical ring 5 is fixed thereto. The universal support ring 4 and the outer spherical ring 5 are formed so that the inner peripheral surface of the universal support ring 4 and the outer peripheral surface of the outer peripheral spherical ring 5 coincide with a part of a spherical surface having the same diameter as much as possible, The contact surfaces between the flexible support ring 4 and the outer spherical ring 5 are kept airtight. The outer spherical ring 5 is fixed to the outer periphery of the front part of the screw conveyor 3, and by fitting the outer spherical ring 5 into the flexible support ring 4, the screw conveyor 3 is fixed to the outer periphery of the front part of the screw conveyor 3. Although it cannot be inserted into or removed from the partition wall 2, it is freely held so that the mounting angle can be changed freely. Note that a dirt seal 1 is installed between a fixed part such as the inner surface of the partition wall 2 and the outer peripheral part of the tip of the screw conveyor 3.
1 is arranged to prevent earth and sand in the chamber A from entering between the flexible support ring 4 and the outer peripheral spherical ring 5.

Then, the rear end of the cylinder 3a of the screw conveyor 3 that protrudes rearward from the shielding machine main body 1 is placed on a pedestal 18 mounted on a cart or sled 17 placed on the existing segment S. be. The upper surface of this pedestal 18 has a groove 18a in which the flange 3c protruding from the outer periphery of the rear end of the screw conveyor 3 is locked. 18 is also pulled and moves forward following it. In addition, this collar part 3
Although not shown in the figure, if the engagement between the shield machine body 1 and the groove 18a does not provide sufficient strength to pull the pedestal 18 as the shield machine body 1 digs, the shield machine body 1 and the pedestal 18 may It is best to connect them with a universal joint or link rod.

Further, a shear removal device 6 is provided in which the crusher 16 is housed on a second cart or a second sled 17a disposed on the segment S at the rear of the pedestal 18.
is installed at the rear end discharge port 3 of the screw conveyor 3.
b is connected to the muddy water inlet 12 of the slurry removing device 6 through a flexible tube 19.

A conventionally known device is used as the slurry removing device 6, and the illustrated example includes a muddy water inlet 12 and a muddy water outlet 13 connected to the discharge port 3b of the screw conveyor 3.
The crusher 1 has a drive source 15 and is driven by a drive source 15.
It stores 6.

Further, the slip removal device 6 is also mounted on a truck or sled 17a that has been carried into the existing mine shaft, but this second truck or second sled 17a is
It is separate from the above-mentioned truck or sled 17, and is designed to prevent the vibrations of the crusher 16 from being transmitted through both sleds 17a, 17.

Further, the flexible tube 19 can be a conventionally known flexible tube that can be bent and twisted within a certain range.

The pedestal 18 and the shedding device 6 are connected by a link rod 24. The link 24 is connected so that when the shield machine main body 1 moves forward as it excavates, the second sled 17a moves forward together with the cradle 18. This is because the vibration of the slip remover 6 is not transmitted to the screw conveyor 3 side.

In the figure, 14 is a mud feeding pipe, 20 is an erector, 21 is a drive source for rotationally driving the screw 22, 23 is a tail packing, and 25 is a shield jack.

[Effect of the invention] The present invention is as described above, and since the screw conveyor 3 is freely supported by the shield machine body 1 via the partition wall 2 by the flexible support ring 4 and the outer peripheral spherical ring 5, the shield machine body It is possible to keep the position of the discharge port 3b of the screw conveyor 3 constant without being affected by the attitude of the shield machine body 1, and even if the attitude of the shield machine body 1 suddenly changes, smooth removal of shear is always possible. It is possible to provide a shield tunneling machine that can perform the following operations.

In addition, as described above, in the present invention, since the position of the discharge port 3b of the screw conveyor 3 can be kept constant, it is possible to use a longer screw conveyor 3, and there is no misalignment with the partition wall 2. It is possible to secure a sufficient space for lining work between the screw conveyor 3 and the shedding device 6, and furthermore, the screw conveyor 3 and the shedding device 6 are less likely to be a hindrance when excavating a curved section, and the work is easier than before. Accordingly, it is possible to provide a shield excavator capable of excavating steeper curved sections.

Further, in the present invention, the rear end of the cylinder 3a is placed on a pedestal 18 mounted on a cart or sled 17 disposed on the existing segment S, and the crusher 16
The sludge removal device 6 is mounted on a second truck or a second sled 17a, and the rear end discharge port 3b of the screw conveyor 3 is flexibly connected to the muddy water inlet 12 of the sludge removal device 6. Since they are connected by the pipe 19, it is possible to provide a shield tunneling machine in which the screw conveyor 3 is always kept in smooth operation by being isolated from the sled section.

Note that the rear end side of the screw conveyor 3 is
When connected and supported to the shield machine main body 1, this connection support member will obstruct the lining work space,
In particular, although this makes it impossible to operate the erector that rotates to convey the segments, the shield excavator has good workability because the rear end of the screw conveyor 3 is supported by the pedestal 18 placed on the existing segment. This is something that can be provided.

[Brief explanation of the drawing]

The drawing is a longitudinal sectional view showing an embodiment of the present invention. 1... Shield machine main body, 2... Bulkhead, 3... Screw conveyor, 4... Flexible support ring, 5...
...Outer spherical ring, 6...Slip removal device.

Claims (1)

[Scope of Claim for Utility Model Registration] In a shield excavator in which a partition wall 2 is provided at the front of a shield body 1 and a screw conveyor 3 is disposed through the partition wall, an inner circumferential surface is provided at the center of the partition wall 2. A universal support ring 4 in the form of a spherical seat is fixed, and an outer circumferential spherical ring 5 that fits into the universal support ring 4 is fixed to the outer circumferential surface of the cylinder 3a of the screw conveyor 3. The rear end of the cylinder 3a of the screw conveyor 3 that protrudes from the
A scraper 16 is placed on a pedestal 18 mounted on a pedestal 7, and a crusher 16 is housed on a second cart or a second sled 17a arranged on a segment S behind the pedestal 18. A flexible tube 19 connects the rear end discharge port 3b of the screw conveyor 3 to the muddy water inlet 12 of the slurry removing device 6.
The shield excavator is further characterized in that the pedestal 18 and the shedding device 6 are connected by a link rod 24.