JP2000248885A - Thrust transmission device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To transmit a thrust when a pipe is laid by driving forward a pipe such as a vinyl chloride pipe and facilitate an arranging work for propulsion and a recovery work of wires after the propulsion. SOLUTION: The thrust transmitting device A which is inserted into a propulsion pipe 1 comprising a synthetic resin pipe such as vinyl chloride pipe to transmit the thrust of a main pushing device to a propulsion machine comprises a transmitting member 2, on a part of the outer periphery of which an open portion 2a is formed along the entire length, a shelf 3 opposed to the portion 2a, end plates 4, 5 attached to the longitudinally opposite ends of the member 2 respectively. At a predetermined location of each of the plates 4, 5, a connection part 6 comprising a bolt hole or screw 7 for insertion of bolt, a bolt hole 6a for insertion of a bolt 9 by tightening it or a collar wherein a gap is provided to provide a play is formed. A plurality of steps are formed from the shelf 3 opposed to the portion 2a of the member 2, and on each step, wires and pipes required for effecting propulsion are mounted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thrust transmitting device which is disposed inside a pipe which cannot bear a thrust and which can transmit a thrust to a leading conductor when the pipe is propelled underground. is there.

[0002]

2. Description of the Related Art When laying sewer pipes or other pipes underground, it is common to adopt a propulsion method of propelling pipes following a leading conductor such as an excavator. This method is
A starting shaft and an arrival shaft are constructed on the planned laying line of the pipeline to be laid, thrust is applied to the tube by a main pushing device installed in the starting shaft, and transmitted to an excavator via the tube to propell. is there. When the excavator arrives at the arrival shaft, a continuous pipe line is laid between the start shaft and the arrival shaft.

[0003] As a pipe constituting the above-mentioned conduit, a fume pipe or a steel pipe is generally used for pipes having a large nominal diameter. However, recently, when the nominal diameter is about 200 mm or 250 mm, a synthetic resin pipe represented by a PVC pipe has been laid. Since such a synthetic resin pipe has a small force capable of transmitting a thrust, a thrust pipe for transmitting a thrust to the inside of the synthetic resin pipe so that a thrust required for propulsion of the excavator is not directly transmitted to the synthetic resin pipe. And thrust is transmitted to the excavator via the thrust pipe.

[0004] A steel pipe is used as the thrust pipe. When a synthetic resin pipe is propelled, a thrust pipe is disposed inside the synthetic resin pipe and power is transmitted to the excavator inside the thrust pipe. Power lines and signal lines for transmitting control signals, pipes for supplying lubrication material to be filled between the excavator and the ground, and between synthetic resin pipes and the ground are arranged, and a muddy excavator is adopted. In such a case, pipes such as a mud pipe and a drain pipe are arranged in addition to the wires and pipes.

Further, in order to monitor the propulsion direction of the excavator and to always control the excavator to be propelled in the correct direction, laser light is emitted from the starting shaft along a predetermined laying line of the pipeline. Laser light is also applied to the target provided on the excavator through the inside of the thrust tube.

When a plurality of thrust pipes are connected with an increase in the number of synthetic resin pipes laid and a muddy water method is employed,
A mud pipe and a mud pipe are connected similarly. The mud pipe and the drain pipe are firmly fastened to each other to prevent leakage of muddy water, and accordingly, the thrust pipes are firmly fastened to each other.

[0007]

In the propulsion method, each time the propulsion of one synthetic resin tube is completed, a new synthetic resin tube is placed on the main pushing device, and a new thrust is placed inside the synthetic resin tube. The pipe is inserted and various electric wires and pipes are connected. This setup operation is performed while paying attention so as to secure a space through which the laser light passes inside the thrust tube. After the pipeline is laid in the ground, all the thrust pipes are collected, and along with this, the electric wires and pipes are also collected. At this time, electric wires and pipes inserted into the thrust pipe are collected through the thrust pipe.

[0008] Since the above-mentioned setup work at the time of propulsion and collection work after completion of the propulsion are performed in a narrow shaft, there is a problem that workability is poor and much time is required. In particular,
Recently, it has been required to reduce the size of the shaft as much as possible in order to minimize the influence on surrounding traffic conditions, and this is not an easy task.

In the propulsion method, the propulsion direction of the excavator may deviate from the planned laying line of the pipeline, and control is performed so that the propulsion direction of the excavator always coincides with the planned laying line. In this case, if the thrust pipes are firmly fastened to each other, there arises a problem that even if the propulsion direction of the excavator is controlled, the direction of the synthetic resin pipe following the excavator cannot be changed smoothly.

An object of the present invention is to provide a thrust transmitting device which can easily perform a setup operation and a recovery operation when a synthetic resin pipe is propelled, and can mutually bend when connected.

[0011]

According to the present invention, there is provided a thrust transmitting device disposed inside a pipe to be propelled and transmitting thrust from a main pushing device to a leading conductor. A transmission member having a length corresponding to the length of the pipe to be propelled and having an open portion formed in a part of the outer circumference over the entire length, and provided at predetermined positions at both longitudinal ends of the transmission member. It has a connecting portion for connecting to another adjacent thrust transmitting device, and a shelf formed in the longitudinal direction of the transmitting member.

In the above thrust transmitting device, an opening is formed in a part of the outer circumference over the entire length, and the thrust can be transmitted by a transmitting member having a length corresponding to the length of the pipe to be propelled. And electric wires or pipes such as a power line and a signal line connected to the excavator can be inserted through the inside of the transmission member. In particular, since the shelf is formed along the opening formed in the transmission member, the inserted wires and pipes can be arranged on the shelf and stored neatly. Therefore, when collecting the electric wires and pipes, the transmission member can be pulled back to the starting shaft and easily collected from the opening formed in the transmission member.

By forming an opening on the outer periphery of the transmission member, when the transmission member is inserted into the pipe to be propelled, the opening corresponding to the opening and the inner periphery of the pipe to be propelled are formed. It is possible to form a wide space consisting of a plane and a plane. Therefore, it is possible to secure a space through which the irradiated laser light passes.

Further, since connection portions for connecting to other thrust transmission devices are provided at both ends of the transmission member, when the propulsion of the pipe to be propelled is completed and a new pipe is connected, the transmission members are connected to each other. Thrust can be transmitted.

In the above thrust transmission device, an end plate having a U-shaped groove corresponding to an opening formed in the transmission member is attached to both ends of the transmission member, and a screw portion or a screw is attached to one end plate. It is preferable to form a penetrating bolt hole and to provide a connection portion on the other end plate that can be bent even when joined to the transmission member.

In the thrust transmission device configured as described above,
A sludge pipe or a sludge pipe can be accommodated in the bottom of the U-shaped groove formed in the end plate. Also, since the connection portion is configured to fit with play through the collar between the screw portion formed on one end plate and the bolt, thrust can be transmitted by contact between the end plates, In addition, refraction of the axis of the connected transmission members can be allowed. Therefore, when the propulsion direction of the excavator shifts, the shift can be easily corrected.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the above-described thrust transmitting device will be described with reference to the drawings. FIG. 1 is a diagram illustrating the configuration of the thrust transmission device. FIG. 2 is a front view illustrating the configuration of the thrust transmission device. FIG. 3 is a view for explaining the configuration of the thrust transmission device, and is a sectional view taken along the line III-III of FIG.
FIG. 4 is a diagram for explaining the configuration of the thrust transmission device,
FIG. FIG. 5 is a diagram illustrating the configuration of the connection unit. FIG. 6 is a diagram illustrating a configuration during propulsion. FIG. 7 is a diagram illustrating electric wires and pipes placed on a shelf of the thrust transmission device during propulsion. FIG. 8 is a diagram illustrating another example of the transmission device. FIG. 9 is a diagram illustrating an example of the excavator.

The thrust transmitting device A according to the present embodiment is a synthetic resin pipe to be propelled underground (for example, a PVC pipe, hereinafter referred to as a "propulsion pipe").
(See FIG. 6), which transmits the thrust given from the main pushing device B to the excavator C as the leading conductor.
), And the propulsion can be performed without causing the propulsion pipe 1 to bear the thrust. In particular, wires such as power lines and signal lines connected to the excavator C and pipes for supplying a lubricant discharged between the ground and the propulsion pipe 1 are easily supplied and easily collected. The configured and continuous thrust transmission device A is configured so that the axes thereof can be bent mutually.

As shown in FIGS. 1 to 7, the thrust transmission device A has a length corresponding to the length of the propulsion pipe 1 and has a transmission member 2 having an open portion 2a formed in a part of the outer periphery and extending over the entire length. It has a shelf 3 provided in correspondence with the portion 2a, and end plates 4 and 5, which are fixed to both ends in the longitudinal direction of the transmission member 2 and have connection portions 6 formed at predetermined positions.

The transmission member 2 is made of a steel pipe having an outer diameter smaller than the inner diameter of the propulsion pipe 1, and is formed as a C-shaped member having an open portion 2a formed over the entire length of the steel pipe. The transmission member 2 is formed with sufficient strength and rigidity to sufficiently bear the thrust given by the main pushing device B. It is essential that the transmission member 2 has a C-shaped cross section in which the opening 2a is formed, and the transmission member 2 does not necessarily need to be formed from a steel pipe, and may be formed by bending a steel plate into a C-shape.

The length of the transmission member 2 corresponds to the length of the propulsion pipe 1. That is, when the thrust transmission device A is configured without attaching the end plates 4 and 5 to both ends of the transmission member 2, the length of the transmission member 2 is substantially equal to the length of the propulsion pipe 1. When the end plates 4 and 5 are mounted on the propulsion pipe 1, the longitudinal dimension including the mounted end plates 4 and 5 is set to be substantially equal to the length of the propulsion pipe 1.

Therefore, it is possible to transmit the thrust by the transmission member 2 alone, and it is possible to house the electric wires and pipes through the opening 2a or to collect the stored electric wires and pipes. It is possible. However, in the present embodiment, by forming the shelf 3 corresponding to the open portion 2a, the inside of the transmission member 2 is divided into a plurality of stages, whereby the wires and pipes can be arranged more neatly. are doing.

The shelf 3 is made of a groove-shaped steel plate or the like provided along the longitudinal direction of the transmission member 2. That is, a plurality of support pieces 3a are fixed at a predetermined pitch to an edge of the open portion 2a of the transmission member 2, and the shelf 3 is attached to the support piece 3a by a small screw 3b.
Installed by. The shelf 3 only needs to be able to support electric wires and pipes, and does not need to be provided over the entire length of the thrust transmission device A. In the present embodiment, the shelf 3 is formed over the entire length. By forming the shelf 3 in this way, it is possible to divide the inside of the transmission member 2 into a plurality of stages, and to arrange and place wires and tubes in each stage.

The end plates 4 and 5 are formed of steel plates having the same shape. The transmission members 2 are attached to the end plates 4 and 5.
U-shaped grooves 4a and 5a corresponding to the open portion 2a of FIG.
Are formed, and connection portions 6 are formed at positions facing each other.

As shown in FIG. 5, the connecting portion 6 is composed of a bolt hole 6a formed in one end plate 4 and a screw 7 or a bolt hole 6b formed in the other end plate 5. A collar 8 is fitted into a bolt hole 6 a formed in the end plate 4, and the inner diameter of the collar 8 is larger than the outer diameter of the bolt 9. By inserting a bolt 9 from the side of the collar 8 (from the end plate 4 side and screwing it into a screw 7 formed on the end plate 5), the thrust transmission devices A can be connected to each other via the bolt 9.

In the thrust transmitting member A connected as described above, when the bolt 9 is screwed into the screw 7, it can be completely screwed and firmly fastened.
There is a gap with the play machine C
, And smooth propulsion and direction control can be realized. In other words, the thrust acting on the thrust transmitting device A arranged subsequently is transmitted to the front side in the propulsion direction in order by the contact of the end plates 4 and 5.

When the axial centers of the connected thrust transmitting devices A are refracted from each other, the end plates on the refraction center side are in contact with each other, and the end plates on the opposite side are separated from each other. At this time,
Since the end plate 4 and the collar 8 are screwed with play, it is possible to allow refraction in the range of the play. FIG.
2b and 2c are screws 7,
A notch that forms a space for performing an operation of screwing the bolt 9 to the collar 8.

The thrust transmitting device A is inserted into the propulsion pipe 1 to transmit a thrust. The outer diameter of the transmission member 2 is made smaller than the inner diameter of the propulsion pipe 1 so that the transmission member 2 can be easily inserted. A sliding plate 10 is attached to the outer periphery of the transmission member 2 so that the thrust transmission device A can slide smoothly when the thrust transmission device A is inserted into the inside of the propulsion pipe 1. The sliding plate 10 has a function of facilitating sliding inside the propulsion pipe 1 of the thrust transmission device A and a function of aligning the axis of the transmission member 2 with the axis of the propulsion pipe 1. are doing.

The thrust transmitting device A has a diameter of, for example, 200 mm.
And a propulsion tube 1 having a diameter of 250 mm. For this reason, as shown in FIG. 7, the sliding plate 10 is configured to be attachable to and detachable from the transmission member 2 with screws 11 so that the difference in diameter of the propulsion pipe 1 can be adjusted by attaching and detaching the spacer 12. Make up.

By providing the transmission member 2 with the shelf 3,
Two levels of shelves are formed in the internal space of the transmission member 2. The upper step of the shelf 3 is opened upward by the opening 2a of the transmission member 2, but the lower step of the shelf 3 is formed as a closed space. Since the space formed in the lower part of the shelf 3 cannot pass wires and pipes from the upper part, a pipe for discharging excavated earth and sand is arranged in advance, and in this state, the pipe is inserted into the propulsion pipe 1 or Collected.

The shelf 3 formed on the transmission member 2 is not limited to the above configuration, but may be configured as shown in FIG. In FIG. 8, a plurality of support pieces 3a are fixed to the transmission member 2 at a predetermined pitch along the longitudinal direction, and a shelf 3 is attached to the support piece 3a by small screws 3b. In particular, the support piece 3a is provided to protrude linearly from the inner peripheral surface of the transmission member 2 toward the center, and the shelf 3 is formed of a flat plate.

Even when the shelf 3 is configured as described above, it is possible to place and support hoses and cables on the shelf 3.

In the present invention, the method of discharging the excavated earth and sand from the ground is not particularly limited. That is, there are a method of discharging by an auger, a method of discharging by a conveyor, and a method of discharging by muddy water, and any of these methods may be adopted.

In this embodiment, a muddy water method is employed.
Excavated sediment is discharged together with mud. For this reason, a mud feed pipe 13 and a mud discharge pipe 14 are arranged in a stage formed at the lower part of the shelf 3.

Insertion ports 13a, 14a are formed at one end of the mud pipe 13 and the drain pipe 14, and receiving ports 13b, 14b are formed at the other end, and are formed on the inner peripheral surface. O-ring 15
Is installed. Grooves 13c and 14c are formed in the outer periphery of the insertion openings 13a and 14a.
The engaging pieces 16 provided on the transmission member 2 are engaged with the transmission member 2, whereby the mud feeding pipe 13 and the drain pipe 14 are locked by the transmission member 2. 14 is prevented from leaving.

Next, the schematic structure of the main pushing device B will be described. The main pushing device B applies thrust to the thrust transmitting device A, transmits the thrust to the excavator C via the thrust transmitting member A, and propels the excavating machine C and the thrust transmitting device A (propulsion pipe 1). . This main pushing device B is installed in a starting shaft (not shown), and a pushing wheel 20 is brought into contact with a propulsion tube 1 mounted on a rail and a thrust transmission device A inserted through the propulsion tube 1 to operate a hydraulic cylinder. It is configured to be driven and propelled.

Next, the schematic configuration of the excavator C will be described with reference to FIG. In the figure, machine C is a shield body 21
And a tail shield 22 are connected via a jack 23 so as to be refracted from each other. It is divided into a soil removal room 25 and an in-machine room 26 by a partition wall 24 provided in the shield body 21,
A cutter head 27 is arranged in the shaving chamber 25, a mud pipe 13 for supplying muddy water to the shaving chamber 25 in the cabin 26, and a mud pipe 14 for discharging the excavated sediment together with the mud from the shaving chamber 25 are arranged. ing. In the cabin 26, a target 28 for monitoring the propulsion direction of the excavator C is arranged, and a television camera 29 for photographing the target 28 is arranged.

At the rear end side of the tail shield 22, a propulsion pipe 1,
A connection pipe 30 connected to the thrust transmission device A is connected, and a nozzle 31 for discharging a lubricant is disposed between the ground and the propulsion pipe 1 near the connection pipe 30.

Next, a state in which the excavator C is disposed at the head and the propulsion pipe 1 is propelled will be described with reference to FIGS. First, the excavator C is propelled by the main pushing device B installed in the starting shaft. At this time, a power line 32 is connected to the drive unit 27a of the cutter head 27 provided in the excavator C, a signal line 33 is connected to the television camera 29, and a transmission line 34 is connected to a relay board (not shown). Water shutoff valve for mud pipe 13 and drain pipe 14
The hydraulic hoses 35 and 36 are connected to 37. Further, a lubricant supply pipe 38 is connected to the lubricant nozzle 31.

When the cutter head 27 of the excavator C is driven and muddy water for preventing the collapse of the ground is supplied to the earth shaving chamber 25, and the main pushing device B is driven, the excavator C is propelled while excavating the ground. . Along with this propulsion, a laser beam is irradiated along the planned laying line of the pipeline to form a spot on the target 28. The target 28 is photographed by a television camera 29,
The image signal is transmitted to a control device installed on the ground and displayed.

After the propulsion of the excavator C is completed, all the connected wires, hoses, and pipes are removed, and the propulsion pipe 1 and the thrust transmitting device inserted through the propulsion pipe 1 are placed on the main pushing device. Place A. Then, the detached electric wires, hoses, and pipes are connected, the excavator C is operated, and the main pushing device is operated to propel the propulsion pipe 1 and the thrust transmission device A.

By repeating the above operation, a new propulsion pipe 1 and a thrust transmission device A can be sequentially propelled.
In particular, when connecting the thrust transmitting device A inserted through the new propulsion tube 1 to the thrust transmitting device A inserted through the already propelled propulsion tube 1, bolts 9 are connected to the connecting portion 6 of the end plate 4 and the collar 8.
Must be firmly fastened to the screw 7 constituting the connecting portion 6 of the end plate 5 and screwed with a clearance between the collar 8 and the end plate 4 with play. And the main pushing device B
Is transmitted when the end plate 4 attached to the transmission member 2 of the following thrust transmission device A comes into contact with the end plate 5 of the preceding thrust transmission device A, and excavates through the thrust transmission device A sequentially. Machine C.

In the above-described propulsion process, laser light is always emitted from the starting shaft along the planned laying line of the pipeline. This laser beam is transmitted to the open portion 2 of the transmission member 2 inserted through the propulsion tube 1.
The vehicle reaches the target 28 of the excavator C through a. In particular,
Since the opening 2a is formed in the transmission member 2, a continuous space having the width of the opening 2a and the distance from the inner peripheral surface of the propulsion tube 1 to the shelf 3 is formed inside the propulsion tube 1, and the laser light is The target 28 is irradiated without any hindrance. If the excavator C shifts from the planned laying line, the position of the spot on the target 28 changes. Propulsion along the line is possible.

When the machine C arrives at the arrival shaft, the machine C is collected from the arrival shaft. Further, the thrust transmission device A inserted through the propulsion pipe 1 is pulled back to the starting shaft side.

When the thrust transmission device A is pulled back, the transmission member 2 constituting the thrust transmission device A has an open portion 2a formed over the entire length, so that the electric wires and hoses placed on the shelf 3 The tubing is unobstructed upward, and can be recovered from the shelf 3 at the same time that the thrust transmission device A is pulled back to the starting shaft. For this reason, flexible electric wires and hoses can be continuously collected by winding them around a drum. Even for tubing,
It can be easily removed as it is,
The collection operation can be performed very easily.

[0046]

As described in detail above, the thrust transmitting device according to the present invention has an opening over the entire length on a part of the outer periphery of the transmitting member and a shelf corresponding to the opening. Wires, hoses or pipes necessary for propulsion can be arranged in an orderly manner. For this reason, when the thrust transmission device is returned to the shaft after the pipe to be propelled is laid, the wires, hoses, and pipes placed on the shelf are exposed and can be collected extremely easily.

Further, since the connecting portion is screwed with play by inserting a collar, even if the continuous thrust transmitting device is bent, this bending can be allowed, and the propulsion can be performed. When the pipe to be propelled meanders due to a deviation in the direction, the thrust transmitting device can bend, so that the thrust transmission can be absorbed and the propulsion can be performed smoothly.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a configuration of a thrust transmission device.

FIG. 2 is a front view illustrating the configuration of a thrust transmission device.

FIG. 3 is a diagram for explaining the configuration of a thrust transmission device, and
It is III-III sectional drawing.

FIG. 4 is a diagram for explaining a configuration of a thrust transmission device,
It is an IV-IV arrow line view.

FIG. 5 is a diagram illustrating a configuration of a connection valve.

FIG. 6 is a diagram illustrating a configuration during propulsion.

FIG. 7 is a diagram illustrating electric wires and pipes placed on a shelf of the thrust transmission device during propulsion.

FIG. 8 is a diagram showing another example of the thrust transmission device.

FIG. 9 is a diagram illustrating an example of an excavator.

[Explanation of symbols]

 Reference Signs List A Thrust transmission device B Main pushing device C Excavator 1 Propulsion pipe 2 Transmission member 2a Opening portion 2b, 2c Notch portion 3 Shelf 3a Support piece 3b Machine screw 4,5 End plate 4a, 5a Groove 6 Connection portion 6a, 6b Bolt hole 7 Screw 8 Collar 9 Bolt 10 Sliding plate 11 Screw 12 Spacer 13 Mud pipe 13a, 14a Insert port 13b, 14b Receiving port 13c, 14c Groove 14 Drain pipe 15 O-ring 16 Locking piece 21 Shield body 22 Tail shield 23 Jack 24 Partition wall 25 Shaving room 26 Cabin room 27 Cutter head 28 Target 29 TV camera 30 Connection tube 31 Nozzle 32 Power line 33 Signal line 34 Transmission line 35 Hydraulic hose 37 Water stop valve 38 Slipper supply pipe

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Takashi Ogawara 4-31-6 Yoyogi, Shibuya-ku, Tokyo Nishishin Sukumatsuya Building F-term in Iseki Development Co., Ltd. F-term (reference) 2D054 AC18 AD20 AD28 CA03 CA04 DA02 DA12 DA12 EA03 FA12 GA04 GA06 GA33 GA38 GA42 GA61 GA82

Claims (2)

[Claims] 1. A thrust transmitting device disposed inside a pipe to be propelled and transmitting thrust from a main pushing device to a leading conductor, the thrust transmitting device having a length corresponding to a length of the pipe to be propelled and having an outer periphery. A transmission member formed with an open portion extending over the entire length in a part of the transmission member, a connection portion provided at a predetermined position at both ends in the longitudinal direction of the transmission member and connected to another adjacent thrust transmission device, A thrust transmission device comprising a shelf formed in a longitudinal direction. 2. An end plate having a U-shaped groove corresponding to an open portion formed in the transmission member is attached to both ends of the transmission member, and a screw portion or a bolt hole is formed in one end plate for passing a screw. 2. The thrust transmission device according to claim 1, wherein the second end plate is formed and a connection portion that can be bent is provided on the other end plate.