JP2000303784A - Underground buried pipe laying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide such an underground buried pipe laying device that an excavating element can be made compact and a sufficient space to install other devices in the excavating element can be provided. SOLUTION: In this device A for laying a buried pipe 3 of a predetermined length in the ground, an excavating means 1 is provided at a front excavating element 2, and the excavating element 2 is propelled by a propelling means 1 via the buried pipe 3 connected to the rear of the excavating element 2. The excavating means 1 is rotated by a drive means 12 comprising a motor 10 and a reduction gear 11, and the reduction gear 11 has a crushing means 9 on its outer periphery and rotates about its own axis while reducing the speed of rotation of the motor 10, so that solids taken into an excavating camber 7 are crushed by the crushing means 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underground pipe laying apparatus used for laying an underground pipe.

[0002]

2. Description of the Related Art Conventionally, in laying underground pipes, as shown in FIG. 5, a large number of bits 51 are provided in a leading pipe 50 of a digging device as a means for digging ground. The provided cutter disc 52 is rotated by a motor 53, and the speed is reduced to about 7 to 10 rpm by two reducers 54 fixed to the leading conduit 50.

[0003] Also, behind the cutter disk 52,
An intake chamber 55 for earth and sand is provided in the front conduit 50, and a crusher 56 that rotates integrally with the cutter disk 52 is attached to the intake chamber 55, and rocks, boulders, etc. in the intake chamber 55 are provided. To a fine particle size.

In this excavating device, since two speed reducers 54 occupy the inside of the leading pipe 50, as shown in FIG. 5, a large storage space L1 is required, and the entire length of the leading pipe 50 becomes longer than necessary. Not only is the length increased, the cost is increased, but also the installation space for the mud feed / discharge device and other devices is compressed, and the inside of the pipe becomes congested. And so on.

[0005]

DISCLOSURE OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has an excavating means provided at a leading excavation body, and a buried pipe connected to a rear portion of the excavating body. In the device for propelling the excavated body by propulsion means through, and laying a buried pipe of a predetermined length in the ground, the excavation means is rotated by drive means consisting of a motor and a speed reducer, the speed reducer is By having a crushing means on the outer periphery, rotating by reducing the rotation of the motor, by rotating the solids taken into the excavation chamber by the crushing means,
It is an object of the present invention to provide an underground pipe laying device capable of forming a digging body compact and obtaining a sufficient space for disposing other devices in the digging body.

[0006]

In order to achieve the above object, according to the present invention, a digging means is provided at a leading excavation body, and the digging means is provided through a buried pipe connected to a rear portion of the digging body. In the underground pipe laying device for laying a buried pipe of a predetermined length in the ground by propelling the excavated body by propulsion means, the excavation means includes a number of cutter bits on a face plate facing the excavation part. An attached external digging member, and crushing means that rotates integrally with the external digging member that crushes solid matter taken in from a discharge port of the face plate in correspondence with a digging chamber provided inside the front side of the digging body. The excavating means is rotated by a driving means comprising a motor and a speed reducer, and the speed reducer has the crushing means on its outer peripheral portion, and rotates by itself while reducing the rotation of the motor. , Solid matter taken into the drilling chamber In the configuration of the underground pipe laying apparatus for crushing by the crushing means.

[0007] The speed reducer of the excavating means is a planetary speed reducer.

Next, an embodiment of an underground pipe laying apparatus according to the present invention will be described with reference to the drawings.

In FIG. 1, A is an underground pipe laying device.
The excavating means 1 is provided on the excavating body 2 at the head, and the excavating body 2 is propelled by a conventional propelling means (not shown) such as a jack through a buried pipe 3 connected to the rear part of the excavating body 2. A buried pipe 3 of a predetermined length is laid therein.

The excavating means 1 includes an external excavating member 6 having a number of cutter bits 5 attached to a face plate 4 facing an excavated portion of the ground, and an excavating chamber 7 provided inside a front side of the excavating body 2. And a crushing means 9 that rotates together with the external digging member 6 to crush solid matter such as rock and boulders generated from the digging portion taken in from the discharge port 8 of the face plate 4. .

The excavating means 1 comprises a motor 10 and a speed reducer 1
1 is rotated by a driving means 12 comprising
Has the crushing means 9 on its outer periphery, and rotates while reducing the rotation of the motor 10 to crush the solid matter taken into the excavation chamber 7 by the crushing means 9.

The above-mentioned external excavating member 6 is rolled onto a face plate 4 formed to have substantially the same or slightly larger outer diameter as the excavating body 2 and to cover the front opening of the excavating body 2. A large number of bit-shaped cutter bits 5 are provided in a predetermined arrangement to crush rocks, boulders, rocks, and other solids generated in the underground excavation path, or to excavate earth and sand. The excavated or crushed stone or rock is appropriately taken in from the outlet 8 provided in the face plate 4 or the outlet 8 provided in the periphery of the cutter bit 5 and is isolated by the partition wall 13 in the excavated body 2. It is once moved into the excavation room 7.

The crushing means 9 comprises a plurality of crushing blades 15 which are planted around the periphery of a cone-shaped rotating body 14 formed so as to be narrowed toward the front opening of the excavated body 2. Corresponding to the blade 15, the rotating body 14 is fed between the rotating body 14 and the inner wall of the excavating chamber 7 by meshing with a fixed blade 16 provided on the inner wall of the excavating chamber 7 having an inverted cone shape. The solid is crushed by grinding the rotation of the crushing blade 15.

The excavated earth and sand in the excavating chamber 7 is carried out to the ground by a mud discharge pipe 17 together with muddy water sent to the excavating chamber 7 and the face by a mud sending unit (not shown) from the ground.

The above-mentioned speed reducer 11 uses a planetary speed reducer as shown in FIG. 4, and an output shaft 18 and an input shaft 19 of the motor 10 are connected by a coupling 20, and the first input shaft 19 is connected to the input shaft 19. A sun gear 21 is axially mounted, and an intermediate shaft 23 is attached to a first planetary gear 22 meshing with the first sun gear 21.

Further, at one end of the intermediate shaft 23, a second sun gear 24 is pivotally supported.
The second planetary gear 25 meshes with the internal gear 27 provided inside the outer frame 26. The outer frame 26 has a rotating body 14 around which a crushing blade 15 is provided via an inner cone 28.
Is fixed, and the rotation center 14a of the rotating body 14 is
As shown in FIG. 3, by setting the rotation center 7 a of the excavation chamber 7 in the excavation body 2 and a predetermined eccentricity difference s, the rotation body 14 performs an elliptical rotational motion, and
The solids taken in can be uniformly crushed from large to small particles.

An outer frame 26 to which the rotating body 14 is attached
Has a rear side fixed to a partition wall 13 of the excavation body 2 and a face plate 4 of the excavating means 1 fixed to a front side.

The underground pipe laying device A configured as described above has the following operation. The excavating means 1 connected to the head of the buried pipe 3 propelled by the propelling means (not shown) excavates the ground with the cutter bit 5 attached to the face plate 4 by the operation of the driving means 12. Then, the solid material such as the excavated soil, the stone and the rock is taken into the excavation room 7 of the excavation body 2 from the discharge port 8.

At this time, the power of the driving means 12 given to the excavating means 1 is transmitted from the motor 10 via the speed reducer 11, and in the speed reducer 11 comprising the planetary speed reducer, a predetermined reduction ratio (For example, 5 to 2
0 rpm), a relatively large power can be generated by the motor 10 having relatively small power, and the diameter of the input shaft 19 connected to the output shaft 18 of the motor 10 may be small. The overall configuration of the speed reducer 11 itself can also be reduced.

That is, the rotation of the motor 10 is controlled by the input shaft 19.
From the first sun gear 21, the first planetary gear 22, the intermediate shaft 23
The second planetary gear 25 meshing with the second sun gear 24 of the intermediate shaft 23 meshes with the internal gear 27 of the outer frame 26, and the outer frame 26 is rotated in a reduced state. Thus, the external digging member 6 is attached to the face plate 4 fixed to the front side of the outer frame 26, and the cutter bit 5 on the front side digs the ground.

The solid matter taken into the excavation chamber 7 is separated from the inner wall of the excavation chamber 7 and the rotating body 14 in the crushing means 9.
And is crushed to a predetermined particle size by the fixed blade 16 and the crushing blade 15, and is carried to the ground together with the muddy excavated soil from the exhaust pipe 17.

In this device A, by using a configuration in which the reduction gear 11 is built in the crushing means 9 in the excavation chamber 7, a conventional reduction gear and a crusher are provided in parallel in the axial direction. As compared with, the overall length of the excavation body 2 is shortened,
It can be formed compact.

In addition, since the crushing means 9 and the speed reducer 11 are integrated, a space in the excavating body 2 is made large, so that not only fine work inside the excavating body 2 is facilitated but also other devices are provided. can do.

[0023]

According to the present invention having the above-described structure, the conventional reduction gear and the crusher can be moved in the axial direction by using a structure in which the reduction gear is built in the crushing means in the excavation chamber of the excavating body. The length of the whole excavated body is shorter than that provided in parallel, and the excavated body can be formed compact. In addition, since the crushing means and the speed reducer are integrated, a space is created in the excavation body, so that not only fine work inside the excavation work is facilitated but also other devices can be provided. By using a planetary reduction gear as the reduction gear in the driving means, a large torque can be generated by using a normal motor. And so on.

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view showing an outline of an underground pipe laying device according to the present invention.

FIG. 2 is a front view of the excavating means in FIG. 1 as viewed from the side.

FIG. 3 is a front view of a section of the excavation chamber in FIG. 1;

FIG. 4 is a schematic side view showing a cross section of the speed reducer and the crushing means in FIG. 1;

FIG. 5 is a vertical sectional side view showing an outline of a conventional excavation device.

[Explanation of symbols]

 A Underground pipe laying device 1 Drilling means 2 Drilling body 3 Buried pipe 4 Face plate 5 Cutter bit 6 External drilling member 7 Drilling room 8 Discharge port 9 Crushing means 10 Motor 11 Reduction gear 12 Drive means

Claims (2)

[Claims] An excavating means is provided at a leading excavation body, and the excavating body is propelled by a propulsion means via an embedding pipe connected to a rear part of the excavating body, and a buried pipe having a predetermined length is buried in the ground. In the underground pipe laying device to be laid, the digging means corresponds to an external digging member in which a number of cutter bits are attached to a face plate facing the digging portion, and a digging chamber provided inside the front side of the digging body. And crushing means for rotating integrally with the external digging member for crushing the solid matter taken in from the discharge port of the face plate, wherein the digging means is rotated by driving means including a motor and a speed reducer. Wherein the speed reducer has the crushing means on an outer peripheral portion thereof, and rotates while reducing the rotation of the motor to crush the solid matter taken into the excavation chamber by the crushing means. Underground buried pipe laying equipment. 2. The underground pipe laying device according to claim 1, wherein the speed reducer of the excavating means is a planetary speed reducer.