JPH10266773A - Propelling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively utilize a limited space for a starting shaft when a jacking pipe is propelled by means of a very narrow starting shaft. SOLUTION: An auxiliary strut 9 is loaded to the front end of a contact section 7 forming a pushing member C loaded to a pushing wheel B in a detachable manner. The auxiliary strut 9 is formed in the shape of a horseshoe, and an interlock section with the pushing member C is provided. Two stage pipe jacking method made by loading the pushing member to the pushing wheel B and three stage pipe jacking method made by loading the auxiliary strut 9 to the pushing member C are executed to locate the rear end face of a jacking pipe G at an excavated section 31 formed in a starting shaft E.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a propulsion device capable of minimizing an installation area and securing a work area.

[0002]

2. Description of the Related Art When laying sewer pipes or other pipes underground, a propulsion method is generally employed. In this method, a start shaft and an arrival shaft are constructed on the planned laying line of the pipeline to be laid, the excavator is propelled by the main pushing device installed in the start shaft, and then the propulsion pipe is made to follow the excavator Is what you do. Then, when the excavator arrives at the arrival shaft, a continuous propulsion pipe is laid between the start shaft and the arrival shaft.

[0003] Since the above-mentioned pipeline is laid under the road, it greatly affects surrounding traffic conditions during the laying work. For this reason, there is a demand for reducing the area of each shaft as much as possible. Even when a branch pipe with a relatively small diameter is laid from the main line, it is required to construct a shaft having a diameter of about a manhole and to carry out the construction.

In order to meet the above demand, there has been proposed a propulsion device in which the stroke of the main pushing device is reduced, and the main pushing device is driven a plurality of times to propel an excavator or a propulsion pipe. For example, the technology disclosed in Japanese Utility Model Publication No. 3-32632
A press-fitting member that abuts against the rear end surface of the buried pipe to propell the pipe, and a jack that advances the press-fitting member back and forth, and alternately pins the press-fitting member, the rear end and the front end of the cylinder. By connecting the jacks, etc., the jack is driven twice to propel one buried pipe.

[0005]

However, even in the above-mentioned technology, the work is not yet perfect to make the work progress more efficiently in a narrow shaft, and the work is performed by effectively utilizing the narrow space of the starting shaft. It is not enough to improve the performance.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a propulsion device configured to secure a maximum working space from a narrow starting shaft.

[0007]

In order to solve the above problems, a propulsion device according to the present invention comprises a frame having a supporting wall and a rail, and a supporting wall movably mounted on the rail. A push ring provided with a mounting portion for detachably mounting a push member that comes into contact with the rear end surface of the excavator or the propulsion pipe on the opposite surface,
A pressing member detachably mounted on the mounting portion of the pressing wheel, and a cylinder having an end portion of a rod supported on the supporting wall, the supporting wall side of the pressing wheel being on the supporting wall side of the cylinder; A jack having a transmission member mounting portion formed at a predetermined position on the outer periphery thereof, and a jack and a push ring which are selectively attached to and detached from the transmission member mounting portion of the jack. And a transmission member for transmitting a force by connecting the auxiliary strud to a contact surface of the pushing member with an end surface of the excavator or the propulsion pipe.

In the above-described propulsion device, the auxiliary stradd can be detachably attached to the tip of the push member detachably attached to the push wheel (the end contacting the rear end surface of the excavator or the propulsion pipe). Therefore, when the excavator or the propulsion pipe is propelled by attaching the pushing member on which the auxiliary strut is attached to the pushing wheel, the rear end surface of the excavator or the propulsion pipe is arranged at a position most distant from the pushing wheel in the starting shaft. For this reason, it is possible to secure a wide space in the center of the starting shaft, and it is possible to perform the setup work for propulsion of the excavator and the propulsion pipe in the wide space of the starting shaft, thereby improving workability.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the above propulsion device will be described below with reference to the drawings. 1 is a plan view of the propulsion device, FIG. 2 is a side view of the propulsion device, FIG. 3 is a front view of the propulsion device, and a diagram illustrating the configuration of the pushing member and the auxiliary strut.
FIG. 4 is a view for explaining a configuration when the propulsion pipe is propelled, and FIGS.
FIG. 7 is a view for explaining a procedure when a new propulsion pipe is made to follow a propulsion pipe that has already been propelled and then propelled.

In the figure, a propulsion device includes a frame A, a push wheel B movably mounted on the frame A, a push member C detachably mounted on the push wheel B, and a reciprocating push wheel B. And a jack D to be moved. This propulsion device is installed, for example, inside a circular starting shaft E having a diameter of about a manhole, propelling the excavator F and propelling the propulsion pipe G following the excavator F to continuously protrude underground. A pipeline consisting of the propulsion pipe G is laid.

The frame A has a supporting wall 1 which abuts against a side wall surface of the starting shaft E to support a reaction force during propulsion, and a gantry 2 formed integrally with the supporting wall 1. Have been. Furthermore,
On the gantry 2, a mounting table 2a for mounting the excavator F and the propulsion pipe G and guiding the propulsion direction, and a rail 2b arranged in parallel with the mounting table 2a and movably mounting the pressing wheel B are formed. Have been.

The push wheel B moves along the gantry 2 and moves as shown in FIG.
The thrust is transmitted to the excavator F or the propulsion pipe G following the excavator F in the process of moving (forwarding) in the direction of arrow a. A hole 3 is formed at the center of the pressing ring B.
And a mounting portion 4 on which the pressing member C is removably mounted is provided on a surface (front surface) opposite to the bearing wall.

The mounting portion 4 supports a plurality of holding members 4a having a U-shaped cross section on a circumference concentric with the hole 3 formed in the pressing ring B to support the weight of the pressing member C. It is arranged at a plurality of positions where the mounting position can be maintained and is fixed to the pressing ring B by means such as welding. Then, the pressing member C is inserted into the holding member 4a from above to be mounted on the pressing wheel B, and is detachable upward to be detachable.

The push wheel B is placed on the rail 2b of the frame A, and moves on the rail 2b driven by the jack D or driven manually. It is preferable that the friction loss is small when the pressing wheel B moves on the rail 2b. For this reason, the wheeled cart 5 is attached to the push wheel B, and when only the push wheel B is moved, the push wheel B is configured to be easily driven with a small force of about human power.

When the excavator F and the propulsion pipe G are propelled or the propelled pipe G propelled is pulled back to the starting shaft E side, the push wheel B is connected to the jack D and the force generated by the jack D is transmitted. For this reason, both sides of the pressing wheel B in the width direction (the left-right direction in FIG. 3) are configured so that a force can be appropriately transmitted from the jack D.

The push member C is mounted on the mounting portion 4 of the push wheel B, and applies thrust acting on the push wheel B to the excavator F and the propulsion pipe G.
To communicate. The push member C is detached from the push wheel B when performing a setup operation for propulsion of the excavator F and the propulsion pipe G. The excavator F is connected with electric wires such as cap tires for power supply and signal cables, and pipes such as a mud feed pipe 26 and a drain pipe 27. These electric wires and pipes are connected to the excavator F. The starting shaft E passes through the inside of the following propulsion pipe G and is connected to a control device and a muddy water treatment device 28 respectively installed on the ground.

Therefore, a large number of electric wires and pipes are arranged on the front side of the push wheel B. For this reason, the pushing member C is formed in a horseshoe shape, and the opening in the shape is arranged downward, thereby avoiding the electric wires and pipes to determine whether these electric wires and pipes are present. Regardless, it is possible to smoothly attach and detach.

The pushing member C includes an engaging portion 6 which is engaged with the mounting member 4a constituting the mounting portion 4, an abutment portion 7 which comes into contact with the excavator F and the rear end face of the propulsion pipe G, and a pressing wheel B. And a notch 8 formed at a portion opposed to the above.

The outer dimensions of the locking portion 6 are set substantially equal to the width of the mounting member 4a constituting the mounting portion 4 provided on the push ring B, and the outer diameter of the contact portion 7 is set to the excavator F, the propulsion pipe. It is set substantially equal to the outer diameter of G. Further, the length of the pushing member C (the distance from the contact surface of the engaging portion 6 with the push ring B to the contact surface of the contact portion 7 with the excavator F and the propulsion pipe G) is
It is set in advance according to conditions such as the shape and dimensions of the starting shaft E.

The notch 8 is formed above the pressing member C and from the side of the locking portion 6 which is a contact surface of the pressing member C to the pressing ring B to the contact portion 7. Therefore, when the pushing member C is mounted on the pushing wheel B, the notch 8 is arranged on the excavator F and the propulsion pipe G side (forward) of the pushing wheel B. For this reason, when performing the work of attaching and detaching the mud feed pipe 26 and the mud discharge pipe 27 or other cables with the push ring B retracted,
This operation can be performed at the center of the starting shaft E.

In this embodiment, in order to effectively utilize the space of the starting shaft E and perform rational propulsion, the auxiliary strut 9 is detachably provided further forward of the contact portion 7 of the pushing member C. It is configured to be attachable.

The auxiliary strut 9 is formed in a horseshoe shape when viewed from the front similarly to the pushing member C, and can be attached to and detached from the end face of the contact portion 7 constituting the pushing member C with the opening directed downward. Have been. That is, as shown in FIG. 3, hook-shaped engaging members 9 a are provided on both side surfaces of the auxiliary strut 9, and are provided on the auxiliary strut 9 on both side surfaces of the contact portion 7 of the pressing member C. A pipe-shaped locking member 7a is provided at a position corresponding to the engaging member 9a. Therefore, by engaging the engaging member 9a of the auxiliary strut 9 with the locking member 7a provided on the contact portion 7, the auxiliary strut 9 can be attached to and detached from the pressing member C.

The structure of the part where the auxiliary strut 9 is attached to and detached from the pushing member C is not limited to the pipe-shaped engaging member 7a and the hook-shaped engaging member 9a. It is also possible to form a tapped hole in the end face of 7, and to form a bolt hole in the auxiliary strut 9 so as to face the tapped hole, and attach / detach the auxiliary strut 9 to / from the pushing member C by a bolt.

The jack D applies a thrust to the pressing wheel B, and is constituted by arranging two hydraulic cylinders including a rod 10 and a cylinder 11 in parallel with the gantry 2. The rod 10 is attached so that the tip can swing in all directions with respect to the supporting wall 1 of the frame A.

At the end of the cylinder 11 on the bearing wall 1 side, a contact member 12 for transmitting thrust by being in contact with the surface (rear surface) of the pressing wheel B on the bearing wall side is fixed. A connection portion 13 serving as a transmission member mounting portion for mounting a transmission member 14 for transmitting thrust to the push wheel B is formed at a predetermined position on the end side opposite to 1.

The contact member 12 has a contact portion 12a contacting the rear surface of the press wheel B to restrict the movement of the press wheel B toward the bearing wall 1 and to press the thrust generated by the jack D into the press wheel. B has the function of transmitting to B and moving forward. This contact member
Reference numeral 12 denotes a state in which the abutment portion 12a is further disposed on the bearing wall 1 side from the end on the bearing wall 1 side of the cylinder 11, that is, in a state where the contact portion 12a is protruded in an overhang shape. It is fixed to one end.

A plurality of comb teeth 13a and 13b are formed on the connecting portion 13 with a predetermined pitch. A transmission member 14 having a U-shape and having teeth meshing with opposing comb teeth is selectively mounted on the comb teeth portions 13a and 13b, whereby the transmission member 14 is brought into contact with the pressing wheel B. Jack D
It is possible to transmit the generated thrust.

In this embodiment, the contact portion 12 of the contact member 12
The distance between the a and the comb teeth 13a on the bearing wall side of the connecting portion 13 is set to be substantially equal to the stroke of the cylinder 11. Therefore, the pressing wheel B is propelled to the stroke limit of the cylinder 11 by the contact member 12, and then the transmitting member 14
By mounting the propulsion pipe G to the stroke limit of the cylinder 11, the propulsion pipe G can be propelled twice the stroke of the cylinder 11.

After the propulsion is completed, the auxiliary strut 9 is further mounted on the pushing member C and the transmission member 14 is connected to the connecting portion.
By attaching the propulsion to the thirteen combs 13b, the propulsion can be performed extra by a distance obtained by adding the pitch of the combs 13a, 13b to the thickness of the auxiliary strut 9.

The excavator F is configured similarly to an excavator generally used for performing a muddy water method. That is,
Shield body 22 with cutter head 21 attached at the top
And a tail shield 23 that is connected to the shield main body 22 so as to be able to bend. The shield main body 22 and the tail shield 23 are connected via a plurality of direction control jacks 24. The tail shield 23 is connected to a machine cylinder 25 containing a hydraulic pump and other devices, and is configured to supply pressure oil for driving the directional jack 24 from the machine cylinder 25.

In the muddy water method, muddy water of which specific gravity is adjusted is supplied to the cutter head 21 to prevent collapse of the ground and to discharge excavated earth and sand together with the muddy water. For this reason, the excavator F is provided with a mud feed pipe 26 and a mud discharge pipe 27. The mud feeding pipe 26 and the mud discharging pipe 27 reach the pushing member C from the propulsion pipe G via the shield main body 22 through the tail shield 23 and the machine cylinder 25, and are exposed from the notch 8 of the pushing member C to the starting shaft E, Is connected to the muddy water treatment device 28 installed in.

The sludge pipe 26 and the sludge pipe 27 are composed of a steel pipe and a hose. That is, for these pipes 26 and 27, a steel pipe is used in a portion from the excavator F to the propulsion pipe G, and a hose is used in a portion corresponding to the inside of the starting shaft E. These tubes 26 and 27 are connected by elbows 26a and 27a.

In the propulsion device configured as described above, the propulsion of one propulsion pipe G is completed, and when a new propulsion pipe G is connected to this propulsion pipe G, the transmission of the propulsion pipe G already propelled is completed. Mud pipe
When connecting a new mud feed pipe 26 and a new mud pipe 27 to the mud pipe 27 or connecting wires (not shown), the jack D is reduced and the pressing wheel B is retracted to the supporting wall 1 side. Thus, this connection operation can be performed in a wide place of the starting shaft E. In particular, since the pipes 26 and 27 are extended in the vertical direction via the elbows 26a and 27a, the connection operation can be easily performed.

Next, the procedure for propelling the propulsion pipe F by the above-described propulsion device will be described with reference to FIGS. It should be noted that the procedure shown in the figure is a propulsion pipe F already propelled and buried underground.
A new propulsion pipe F is followed by the propulsion. In this embodiment, the starting shaft E has a diameter of 1500 mm and a length of 1050 mm.
Of the propulsion tube G.

As shown in FIG. 5A, a digging portion 31 called raccoon digging is formed in the propulsion direction of the starting shaft E, and the propulsion pipe G has a rear end inside the digging portion 31. Is being promoted to be located.

After the propulsion pipe G is propelled, the jack D is contracted to bring the cylinder 11 closer to the supporting wall 1 side, and the pressing wheel B is brought into contact with the contact portion 12a of the contact member 12 to be retracted. In this state, the push wheel B is located closer to the bearing wall 1 than the end of the cylinder 11 on the bearing wall 1 side, and is therefore at the most retracted position in the starting shaft E. In this state, a new propulsion pipe G into which the mud feeding pipe 26 and the mud discharging pipe 27 have been inserted in advance is carried in, and is mounted on the mounting table 2a of the frame A. And mounting table 2
The propulsion pipe G mounted on the a is pushed into the push wheel B side, so that a wide space is formed between the propulsion pipe G already propelled and the new propulsion pipe G. A push ring 29 is attached to the rear end of the new propulsion pipe G in advance.

The pipes 26 and 27 inserted into the new propulsion pipe G are connected to the pipes 26 and 27 arranged in the propulsion pipe G already propelled in the above state. This operation can be performed in a large space formed between the propulsion pipe G already propelled and the new propulsion pipe G.

Next, as shown in FIG. 3B, the propulsion pipe G is manually advanced and brought into contact with the rear end face of the propulsion pipe G already propelled, so that the push wheel B and a new propulsion pipe are formed. A wide space is formed between G and the rear end. In particular, push ring B
A notch 8 is formed in the pushing member C disposed between the propulsion pipe G and the thrust pipe 26, a mud pipe 27 and a muddy water treatment device 28 inserted into a new propulsion pipe G through the notch 8. It is possible to perform a connection operation with a hose to be connected, and this connection operation can be easily performed.

As described above, the sludge pipe 26 and the sludge pipe 27 are connected to the muddy water treatment apparatus installed on the ground, and at the same time, other cables and hoses are respectively connected to the corresponding facilities. At this time, the pressing member C may be mounted on the pressing wheel B in advance, and the pipes 26, 26 and the cables may be connected through the notch 8 of the pressing member C, or the pipes 26, 27 and the cables may be connected. After connection, these may be collectively passed through the notch 8 and the pressing member C may be mounted on the pressing wheel B.

Next, as shown in FIG. 6 (a), the jack D is driven to extend the cylinder 11, and the thrust is transmitted from the contact portion 12a of the contact member 12 to the pressing wheel B. F
By driving the cutter head 21, the excavator F and the propulsion pipe G are propelled to the stroke limit of the cylinder 11. After the propulsion is completed, when the cylinder 11 is contracted as shown in FIG. 4B, the push wheel B maintains the forward position.
In this state, the transmission member 14 is mounted on the comb teeth 13a of the connection portion 13.

Thereafter, the propulsion pipe G is propelled by extending the cylinder 11 again to the stroke limit as shown in FIG. At this time, since the starting shaft E is circular and the two cylinders 11 are arranged in parallel, when the cylinder 11 is extended to the stroke limit, the rear end of the propulsion pipe G still protrudes inside the starting shaft E. Cylinder even in state
11 ends approaching the retaining wall of the starting shaft E,
There is no way to effectively utilize the inside of the system to improve workability.

For this reason, as shown in FIG. 7 (a), the cylinder 11 is reduced again, and the pressing wheel B is also retracted toward the supporting wall 1, and the auxiliary strut 9 is mounted on the end surface of the pressing member C and connected. Attach the transmission member 14 to the comb teeth 13b of the part 13,
As shown in FIG. 3B, the cylinder 11 is further extended to propel the propulsion pipe G, so that the propulsion pipe G is propelled until the rear end thereof is located inside the dug portion 31.

As described above, by propelling the propulsion pipe G in three stages, the rear end of the propulsion pipe G is positioned at the dug portion 31 formed in the starting shaft E, thereby forming the internal space of the starting shaft E. Can be widened.

[0044]

As described in detail above, in the propulsion device according to the present invention, since the auxiliary strut can be detachably attached to the end of the contact portion of the pushing member, the pushing member is attached to the pushing wheel. Digging part without protruding the rear end of the propulsion pipe into the starting shaft by performing three-stage propulsion, namely, two-stage propulsion by mounting the auxiliary strut on the pushing member, and propulsion by mounting the auxiliary strut on the pushing member. Can be located. For this reason, when setting up the nest of the excavator or the propulsion pipe, the connection work of the wires and pipes is performed using the wide space formed between the front face of the push ring and the already propelled nest mark pipe. Easy to do.

[Brief description of the drawings]

FIG. 1 is a plan view of a propulsion device.

FIG. 2 is a side view of the propulsion device.

FIG. 3 is a front view of the propulsion device.

FIG. 4 is a diagram illustrating a configuration when a propulsion pipe is propelled.

FIG. 5 is a diagram illustrating a procedure when a new propulsion pipe is propelled by following a propulsion pipe that has already been propelled.

FIG. 6 is a diagram illustrating a procedure when a new propulsion pipe is propelled by following a propulsion pipe that has already been propelled.

FIG. 7 is a diagram illustrating a procedure when a new propulsion pipe is propelled by following a propulsion pipe that has already been propelled.

[Explanation of symbols]

 Reference Signs List A Frame B Push wheel C Push member D Jack D E Starting shaft F Drilling machine G Propulsion pipe 1 Supporting wall 2 Trestle 3 Hole 4 Mounting part 5 Wheeled trolley 6 Locking part 7 Contact part 8 Notch 9 Auxiliary strut 10 Rod 11 Cylinder 12, 13 Connection part 14 Transmission member 21 Cutter head 22 Shield body 23 Tail shield 24 Direction control jack 25 Machine cylinder 26 Mud pipe 27 Drain pipe 28 Mud water treatment device 31 Dig part

Claims (1)

[Claims] 1. A frame having a supporting wall and a rail, and a pushing member movably mounted on the rail and contacting a rear end surface of an excavator or a propulsion pipe on a surface opposite to the supporting wall. A push ring provided with a mounting portion for detachably mounting the push ring, a push member detachably mounted to the mounting portion of the push ring, and a cylinder having an end portion of a rod supported by the supporting wall. A jack having a transmission member mounting portion formed at a predetermined position on an outer periphery thereof, wherein a contact member for transmitting a thrust by being brought into contact with a surface of the pressing wheel on the supporting wall side of the cylinder is fixed to the supporting wall side of the cylinder; A transmission member that is selectively attached to and detached from the member mounting portion and transmits the force by connecting the jack and the push ring, and an auxiliary strut is attached to and detached from a contact surface of the push member with an end surface of the excavator or the propulsion pipe. A propulsion device characterized in that it can be mounted as possible.