JP3005024U - Structure of muddy water shield machine - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a structure of a muddy water shield machine capable of efficiently preventing clogging of a mud discharge port without using a dedicated drive source. [Structure] A free rotating blade is rotatably attached to the front of the mud discharge port in a state where the rotation locus overlaps with the mud discharge port in a loosely fitted state.
A structure of a muddy water shield machine with a rotational force applying member protruding from the back of the cutter head, and the movement trajectory of the rotational force applying member being arranged at a position overlapping the rotation range of the blade plate of the free rotating blade. Is.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to the structure of a muddy water shield machine.

[0002]

[Prior art]

 As a type of shield machine, there is a muddy water shield machine. As shown in FIGS. 3 and 4, a cutter head 1 composed of a rotating disk is provided on the front surface of a cylindrical shell body, and a muddy water chamber 2 is provided on the back surface of the cutter head 1. It is a structure in which mud water is mixed with the earth and sand taken in and discharged as a fluid to the outside of the excavator. Therefore, a part of the muddy water chamber 2 is opened as a sludge discharge port 3, and a sludge discharge pipe 4 is connected to the outside of the muddy water discharge port 3.

Then, the structure is such that the earth and sand taken in from the mud discharge port 3 is discharged to the outside through the mud discharge pipe 4, but there is a possibility that it will be blocked by the earth and sand sucked by the mud discharge port 3. Therefore, as shown in FIGS. 3 and 4, a drive blade 5 for stirring, which is called an agitator, is arranged on the front surface of the sludge discharge port 3 in a state where the rotation locus overlaps with the sludge discharge port 3. The drive blades 5 are constantly rotated at a low speed by a hydraulic motor to prevent blockage.

[0004]

[Problems to be solved by the present invention]

 The structure of such a conventional muddy water shield machine has the following problems. <B> Since there is no space inside the shield machine, a large hydraulic motor cannot be installed. Therefore, the driving blade 5 for the agitator has a small capacity, and it is impossible to strongly mix and remove the sand. <B> Since the capacity of the motor of the drive blades 5 is small and it is difficult to perform strong kneading, there is a risk of soil clinging around the mud discharge port 3 and clogging especially on the ground of cohesive soil. was there. <C> For the same reason, in the case of gravel-blended earth and sand, there was a risk that the drive blade 5 could not rotate due to its resistance. <D> If the rotation of the drive blades 5 is stopped after a long holiday such as New Year's Day or Obon, the sediment will settle down. Therefore, it takes a long time to circulate the whole mud chamber 2 when the operation is restarted.

[0005]

[Purpose of the present invention]

 The present invention has been made in order to achieve the above object, and provides a structure of a mud-type shield machine capable of efficiently preventing clogging of a mud discharge port without using a dedicated drive source. The purpose is to

[0006]

[Means for solving problems]

 That is, the present invention provides a cutter head composed of a rotating disc on the front surface of a cylindrical shell, a mud chamber is provided on the back side of the cutter head, and a mud outlet is opened in the mud chamber. In a muddy water shield machine with a structure in which a mud discharge pipe is connected to the outside of the mud discharge port, and the earth and sand taken in from the mud discharge port is discharged to the outside through the mud discharge pipe, the front of the mud discharge port rotates. A free-rotating blade is placed with its locus overlapping with the mud discharge port, and this free-rotating blade is rotatably mounted in a loosely fitted state with respect to the central axis, and a rotating force applying member is attached to the back surface of the cutter head. Structure of a mud-type shield excavator constructed by arranging it so that the trajectory of the rotating force applying member that protrudes and moves with the rotation of the cutter head overlaps the rotation range of the blade plate of the free rotating blade. Is.

[0007]

[Configuration of the present invention]

 The structure of the muddy water shield machine of the present invention will be described below with reference to the drawings.

<B> Overall Structure The muddy water shield machine is provided with a cutter head 1 composed of a rotating disk on the front surface of a cylindrical shell body as described above, and a muddy water is provided on the back surface of the cutter head 1. The structure has a chamber 2. The mud chamber 2 is provided with a mud supply port and a mud discharge port 3, and a mud discharge pipe 4 is connected to the outside of the mud discharge port 3. By supplying muddy water from the mud supply port, the sediment inside the muddy water chamber 2 is fluidized and discharged from the mud discharge port 3 through the mud discharge pipe 4 to the outside of the shield tunnel.

<B> Free Rotating Blades 6 Inside the muddy water chamber 2, one or more free rotating blades 6 are provided. At least one of the free rotating blades 6 is arranged so that the blade plate crosses the front surface of the sludge discharge port 3. A drive source such as a motor is not attached to the free-rotating blades 6, and the free-rotating blades 6 are attached to the central shaft in a loosely fitted state. Therefore, it is not driven by its own force, but can be rotated if it receives another external force. In addition to the position where the blade plate crosses the front surface of the sludge discharge port 3, a plurality of free rotating blades 6 are provided adjacent to each other in a state where the rotation loci of the blade plates overlap each other. You can also The free-rotating blades 6 need not be arranged at any free position in the muddy water chamber 2, but there are restrictions on the arrangement as will be described later.

<C> Rotational Force Applying Member On the other hand, one or more rotational force applying members 7 are provided on the back surface of the cutter head 1. The rotational force imparting member 7 can be formed of a simple rod-shaped member, but it is sufficient if it can give a rotational force by colliding with the free-rotating blades 6 as will be described later. Even a shape can be used. The length of the rotational force imparting member 7 is set so that at least the tip thereof reaches the position of the free rotating blade 6. This member is fixed to the back surface of the cutter head 1, and the cutter head 1 rotates about a central drive shaft. Therefore, when the cutter head 1 rotates, the rotating force applying member 7 rotates integrally, and the movement locus 8 thereof becomes concentric with the cutter head 1.

<D> Arrangement Relationship The free rotating blade 6 is arranged at a position where the rotation range of the blade plate and the rotation locus 8 of the rotation force applying member 7 overlap. Whether the number of free-rotating blades 6 is one or plural, the range of rotation of the blade plates of all the free-rotating blades 6 is arranged so as to overlap the rotation locus 8 of the rotational force imparting member 7.

<E> Operation The cutter head 1 is rotated during excavation. Then, in accordance with this rotation, the rotational force imparting member 7 protruding to the back surface also rotates on the locus 8. The rotation locus 8 of this member is configured to pass through the rotation range of the free rotating blade 6 as described above. Therefore, the rotational force imparting member 7 sequentially collides with the blade plate of the freely rotating blade 6. The free rotating blade 6 does not have a drive source and only freely fits on the central axis, so that the rotating force is given by the force of the applying member 7. As a result, as long as the cutter head 1 is rotating, the free-rotating blade 6 continues to rotate in the muddy water chamber 2 to agitate the soil and sand inside to increase the efficiency of sludge discharge.

[0013]

[Effect of the present invention]

 Since the structure of the muddy water shield machine of the present invention is as described above, the following effects can be obtained. <A> No special drive source is required to prevent clogging of the mud discharge port 3. Therefore, the space can be widely opened in the shield machine, which has a large volume limit, and other components can be freely arranged or can be widely used as a repair space. <B> The free-rotating blade 6 of the present invention has an order of magnitude larger than the capacity of the conventional hydraulic motor and is rotated by utilizing the rotational force of the cutter head 1. Therefore, regardless of whether it is cohesive soil or gravel, there is no problem in stirring, and there is no accident that mud adheres to block the mud discharge port 3 or disable rotation. <C> The free rotating blade 6 is forcibly rotated with the rotation of the cutter head 1. Therefore, even if the rotation of the agitator is stopped after a long holiday such as New Year's Day or Obon, it is possible to circulate the entire mud chamber 2 within a short time by stirring the sediment that has settled downward. it can.

[Brief description of drawings]

FIG. 1 is an explanatory view of the structure of the muddy water shield machine of the present invention.

FIG. 2 is an explanatory diagram showing the relationship between the loci of the freely rotating blades and the rotational force imparting member.

FIG. 3 is an explanatory view of a structure of a conventional muddy water shield machine.

FIG. 4 is an explanatory view of a structure of a conventional muddy water shield machine.

Claims (2)

[Scope of utility model registration request] 1. A cutter head composed of a rotating disk is provided on the front surface of a cylindrical shell, and a muddy water chamber is provided on the back surface of this cutter head. In a muddy water shield machine with a structure in which a mud discharge pipe is connected to the outside of the mud mouth and the earth and sand taken in from the mud mouth is discharged to the outside through the mud discharge pipe, the rotation path is shown in front of the mud mouth. Is placed so that it overlaps with the mud discharge port, and this free rotation blade is rotatably attached to the center axis while being loosely fitted to it. The structure of the muddy water shield machine, in which the movement locus of the rotational force applying member that moves with the rotation of the cutter head overlaps with the rotation range of the blade plate of the free rotating blade. 2. A cutter head formed of a rotating disk is provided on the front surface of a cylindrical shell, and a muddy water chamber is provided on the back surface of this cutter head. In a muddy water shield machine with a structure in which a mud discharge pipe is connected to the outside of the mud mouth and the earth and sand taken in from the mud mouth is discharged to the outside through the mud discharge pipe, the rotation path is shown in front of the mud mouth. The free-rotating blades are arranged so that they overlap with the mud discharge port, and multiple free-rotating blades are also arranged at other positions. Each free-rotating blade is rotatably attached to the central axis in a loosely fitted state. On the other hand, a rotational force imparting member is provided on the back surface of the cutter head, and the movement locus of the rotational force imparting member that moves with the rotation of the cutter head overlaps the rotation range of the blade plates of all the free rotating blades. Muddy water shield digging constructed by arranging in position Structure of progress