JP4047478B2 - Thrust transmission device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a thrust transmission device that is disposed inside a pipe and can transmit thrust to a leading conductor when a pipe that cannot bear thrust is propelled into the ground.
[0002]
[Prior art]
When laying sewer pipes or other pipes in the ground, it is common to adopt a propulsion method that propels the pipes after the leading conductor of an excavator, for example. In this method, a start shaft and an arrival shaft are constructed on the planned laying line of the pipeline to be laid, a thrust is applied to the pipe by a main pushing device installed in the start shaft, and transmitted to the excavator through the pipe. To promote. When the excavator arrives at the arrival shaft, a continuous pipe line is laid between the departure shaft and the arrival shaft.
[0003]
As the pipe constituting the pipe, a pipe having a large nominal diameter generally uses a fume pipe or a steel pipe. However, recently, when the nominal diameter is about 200 mm or 250 mm, synthetic resin pipes typified by PVC pipes have been installed. Since such a synthetic resin pipe has a small force capable of transmitting a thrust, a thrust pipe for transmitting the thrust to the inside of the synthetic resin pipe so that the thrust applied to the propulsion machine is not directly transmitted to the synthetic resin pipe. And the thrust is transmitted to the excavator through the thrust tube.
[0004]
A steel pipe is used as the thrust pipe. When propelling a synthetic resin pipe, a thrust pipe is arranged inside the synthetic resin pipe and a power line that transmits power to the excavator is provided inside the thrust pipe. When a signal line for transmitting a control signal, a pipe for supplying a lubricant to be filled between the excavator and the natural ground, and between the synthetic resin pipe and the natural ground are arranged, and when a mud construction method excavator is adopted In addition to the wires and pipes, pipes such as a mud pipe and a mud pipe are arranged.
[0005]
Furthermore, in order to monitor the propulsion direction of the excavator and always control the excavator in the correct direction, laser light is emitted from the start shaft along the planned laying line of the pipeline. The target is provided on the excavator through the inside of the thrust tube.
[0006]
A plurality of thrust pipes are connected as the number of synthetic resin pipes increases, and when a mud construction method is adopted, a mud pipe and a waste mud pipe are connected in the same manner. The mud pipe and the mud pipe are fastened to each other in order to prevent leakage of mud water, and the thrust pipes are also fastened to each other accordingly.
[0007]
[Problems to be solved by the invention]
In the propulsion method, a new synthetic resin pipe is placed on the main pushing device every time the propulsion of one synthetic resin pipe is completed, and a new thrust pipe is inserted into the synthetic resin pipe and various electric wires. And pipes are connected. This set-up operation is performed with care so as to secure a space through which the laser beam can pass inside the thrust tube. In addition, after the pipeline is laid in the ground, all the thrust pipes are collected, and along with this, the wires and pipes are also collected. At this time, the electric wires and pipes inserted into the thrust tube are collected through the thrust tube.
[0008]
Since the setup work at the time of propulsion and the recovery work after the 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, in recent years, 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.
[0009]
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 matches 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.
[0010]
An object of the present invention is to provide a thrust transmission device that can easily perform setup work and recovery work when propelling a synthetic resin pipe, and can permit refraction when connected.
[0011]
[Means for Solving the Problems]
In order to solve the above-described problems, a thrust transmission device according to the present invention is a thrust transmission device that is disposed inside a tube to be propelled and transmits thrust from a main pushing device to a leading conductor. A transmission member having a length corresponding to the length and having an open portion extending over the entire length of a part of the outer periphery, and a U-shaped groove attached to both ends of the transmission member and corresponding to the open portion formed in the transmission member And a screw hole or a bolt hole that penetrates the screw is formed in one of the end plates, and the other end plate is configured to be refractable and connected to an adjacent thrust transmission device. A ring-shaped groove formed on the outer periphery, and the ring-shaped groove engages with a locking piece formed on the transmission member, and at least one end in the longitudinal direction thereof is the end plate. A tube placed at the bottom of a U-shaped groove formed in And it is formed and a longitudinal direction forming the ledge and the transmission member at the top of the tube.
[0012]
In the above thrust transmission device, an open portion extending over the entire length is formed on a part of the outer periphery, and the thrust can be transmitted by a transmission member having a length corresponding to the length of the tube to be propelled, via the open portion. Electric wires or pipes such as power lines and signal lines connected to the excavator can be inserted into the transmission member. In particular, since the shelf is formed along the open portion formed in the transmission member, the inserted electric wires and tubes can be aligned and accommodated in an orderly manner. Therefore, when recovering the electric wires and pipes, the transmission member can be pulled back to the start shaft and easily recovered from the open portion formed in the transmission member.
[0013]
In addition, by forming an open portion on the outer periphery of the transmission member, when the transmission member is inserted into the tube to be propelled, the portion corresponding to the open portion is separated from the open portion and the inner peripheral surface of the tube to be propelled. A wide space can be formed. For this reason, the space which allows the irradiated laser light to pass through can be secured.
[0014]
In addition, since the connection parts that connect to other thrust transmission devices are provided at both ends of the transmission member, when the pipe to be propelled is finished and a new pipe is connected, the transmission members are connected to transmit the thrust. I can do it.
[0015]
In addition, end plates having U-shaped grooves corresponding to the open portions formed in the transmission member are attached to both ends of the transmission member, and a screw portion or a bolt hole penetrating the screw is formed in one end plate and the other Since the connecting portion that can be refracted even when joined to the transmission member is provided on the end plate, the mud pipe and the mud pipe can be accommodated in the bottom of the U-shaped groove formed in the end plate.
[0016]
In addition, since the connection part is configured to fit with play between the screw part formed on one end plate and the bolt through the collar, the thrust can be transmitted by contact between the end plates, In addition, it is possible to allow refraction of the axial centers of the connected transmission members. For this reason, when the propulsion direction of the excavator shifts, this shift can be easily corrected.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a preferred embodiment of the thrust transmission 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 cross-sectional view taken along the line III-III in FIG. FIG. 4 is a diagram for explaining the configuration of the thrust transmission device, and is a view taken along arrows IV-IV in FIG. 1. FIG. 5 is a diagram illustrating the configuration of the connection unit. FIG. 6 is a diagram for explaining the configuration during propulsion. FIG. 7 is a diagram for explaining electric wires and pipes placed on the 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 an excavating machine.
[0018]
The thrust transmission device A according to the present embodiment is disposed inside a synthetic resin pipe (for example, a polyvinyl chloride pipe, hereinafter referred to as “propulsion pipe”) 1 to be propelled in the ground, and leads the thrust applied from the main pushing device B. This is transmitted to the body excavator C (see FIG. 6), and can be propelled without burdening the propulsion pipe 1 with thrust. In particular, power lines, signal lines, and the like connected to the excavator C and pipes for supplying the lubricant discharged between the ground and the propulsion pipe 1 can be easily supplied and easily recovered. The thrust transmission device A that is configured and continuous is configured to be able to refract each other with respect to the axis.
[0019]
As shown in FIGS. 1 to 7, the thrust transmission device A has a length corresponding to the length of the propulsion pipe 1, a transmission member 2 having an open portion 2 a extending over the entire length on a part of the outer periphery, and an open portion 2 a The shelves 3 are provided in correspondence with each other, and end plates 4 and 5 that are fixed to both ends in the longitudinal direction of the transmission member 2 and have connection portions 6 formed at predetermined positions.
[0020]
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. This transmission member 2 is formed with strength and rigidity that can sufficiently bear the thrust applied by the main pushing device B. In addition, it is essential that the transmission member 2 has a C-shaped cross section in which the open portion 2a is formed. The transmission member 2 is not necessarily formed from a steel pipe, and may be formed by bending a steel plate into a C-shape.
[0021]
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 propelling pipe 1, and both ends as in this embodiment. When the end plates 4 and 5 are attached, the longitudinal dimension including the attached end plates 4 and 5 is set to be substantially equal to the length of the propelling tube 1.
[0022]
Accordingly, it is possible to transmit the thrust by the transmission member 2 alone, and it is possible to accommodate the wires and pipes inside or to collect the accommodated wires and tubes via the opening 2a. . However, in the present embodiment, the shelf 3 is formed in correspondence with the open portion 2a, so that the inside of the transmission member 2 is divided into a plurality of stages, whereby the electric wires and pipes can be arranged more orderly. is doing.
[0023]
The shelf 3 is constituted by 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 to the edge of the open portion 2a of the transmission member 2 at a predetermined pitch, and the shelf 3 is attached to the support pieces 3a with the small screws 3b. 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, but is configured over the entire length in this embodiment. By forming the shelf 3 in this way, the inside of the transmission member 2 can be divided into a plurality of stages, and electric wires and tubes can be arranged and placed on each stage.
[0024]
The end plates 4 and 5 are formed of steel plates having the same shape. The end plates 4 and 5 are formed with U-shaped grooves 4a and 5a corresponding to the open portion 2a of the transmission member 2 and having a width dimension substantially equal to the shelf 3 and a dimension deeper than the position of the shelf 3. The connecting portions 6 are formed at positions facing each other.
[0025]
As shown in FIG. 5, the connecting portion 6 includes a bolt hole 6 a formed in one end plate 4 and a screw 7 or bolt hole 6 b formed in the other end plate 5. A collar 8 is fitted in the 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. The thrust transmission device A can be connected to each other via the bolt 9 by inserting the bolt 9 from the end plate 4 side and screwing it onto the screw 7 formed on the end plate 5.
[0026]
In the thrust transmission member A connected as described above, when the bolt 9 is screwed to the screw 7, it can be completely screwed and firmly tightened, but the end plate 4 side and the collar 8 are not spaced apart. By providing play, it is possible to allow meandering of the excavator C and achieve smooth propulsion and direction control. That is, the thrust acting on the thrust transmission 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.
[0027]
When the axial centers of the connected thrust transmission devices A are refracted from each other, the end plates on the refraction center side come into 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 together with play, refraction can be allowed within the play range. In FIG. 5, reference numerals 2b and 2c denote notches that form spaces for screwing the bolts 9 into the screws 7 and the collars 8 constituting the joints 6, respectively.
[0028]
The thrust transmission device A is inserted through the propelling tube 1 and transmits thrust. And it is comprised so that it can insert easily by making the outer diameter of the transmission member 2 smaller than the inner diameter of the propulsion pipe 1. 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 propelling tube 1. The sliding plate 10 has a function of easily sliding inside the propulsion tube 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 tube 1. is doing.
[0029]
Moreover, it is preferable that the thrust transmission device A can be used in common for the propulsion pipe 1 having a diameter of 200 mm and the propulsion pipe 1 having a diameter of 250 mm, for example. For this reason, as shown in FIG. 7, the sliding plate 10 is configured to be detachable with respect to the transmission member 2 with screws 11, so that the difference in the diameter of the propelling tube 1 can be adjusted by detaching the spacer 12. It is composed.
[0030]
By providing the shelf 3 on the transmission member 2, a two-stage shelf is formed in the internal space of the transmission member 2. Although the upper stage of the shelf 3 is opened upward by the opening 2a of the transmission member 2, the lower stage 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. In this state, the pipe is inserted into the propulsion pipe 1 or Collected.
[0031]
The shelf 3 formed on the transmission member 2 is not limited to the configuration as described above, and 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 pieces 3a with small screws 3b. In particular, the support piece 3a is provided so as 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.
[0032]
Even when the shelf 3 is configured as described above, hoses and cables can be placed and supported on the shelf 3.
[0033]
In the present invention, the method for discharging ground excavated soil is not particularly limited. That is, there are a method of discharging by an auger, a method of discharging by a conveyor, or a method of discharging by muddy water, and any of these methods may be adopted.
[0034]
In this embodiment, a mud construction method is employed, and excavated sediment is discharged together with the mud. For this reason, a mud pipe 13 and a mud pipe 14 are arranged on the step formed in the lower part of the shelf 3.
[0035]
Insertion ports 13a and 14a are formed at one end of the mud pipe 13 and the sludge discharge pipe 14, and receiving ports 13b and 14b are formed at the other end, and an O-ring 15 is formed on the inner peripheral surface. Is installed. Grooves 13c and 14c are formed in the outer peripheral portions of the insertion openings 13a and 14a, and the locking pieces 16 provided on the transmission member 2 are engaged with the grooves 13c and 14c. The mud pipe 14 is locked to the transmission member 2 to prevent the pipes 13 and 14 from being detached even when the thrust transmission device A is moved.
[0036]
Next, a schematic configuration of the main pushing device B will be described. The main pushing device B applies thrust to the thrust transmission device A and transmits the thrust to the excavator C via the thrust transmission member A to propel the excavator C and the thrust transmission device A (propulsion pipe 1). . The main pushing device B is installed in a start shaft (not shown), and a pusher wheel 20 is brought into contact with a propulsion pipe 1 placed on a rail and a thrust transmission device A inserted through the propulsion pipe 1 to thereby install a hydraulic cylinder. It is configured to be able to drive and propel.
[0037]
Next, a schematic configuration of the excavator C will be described with reference to FIG. In the figure, the excavator C is configured such that a shield body 21 and a tail shield 22 are connected via a jack 23 so that they can be refracted from each other. The partition 24 provided in the shield body 21 is divided into a soil cutting chamber 25 and an in-machine chamber 26. A cutter head 27 is arranged in the soil cutting chamber 25, and mud feeds the mud water to the earthing chamber 25 into the in-machine chamber 26. A mud discharge pipe 14 for discharging the excavated earth and sand together with the muddy water from the pipe 13 and the earth cutting chamber 25 is disposed. In the cabin 26, a target 28 for monitoring the propulsion direction of the excavator C is disposed, and a television camera 29 for photographing the target 28 is disposed.
[0038]
A propulsion pipe 1 and a connecting pipe 30 connected to the thrust transmission device A are connected to the rear end side of the tail shield 22, and a lubricant is discharged between the ground and the propelling pipe 1 in the vicinity of the connecting pipe 30. A nozzle 31 is disposed.
[0039]
Next, the 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 vertical shaft. At this time, the power line 32 is connected to the drive unit 27a of the cutter head 27 provided in the excavator C, the signal line 33 is connected to the television camera 29, and the transmission line 34 is connected to the relay panel (not shown). Hydraulic hoses 35 and 36 are connected to the water stop valves 37 of the mud pipe 13 and the mud pipe 14. Further, a lubricant supply pipe 38 is connected to the nozzle 31 of the lubricant.
[0040]
When the cutter head 27 of the excavator C is driven and muddy water is supplied to the earth cutting chamber 25 to prevent the collapse of the natural ground, and the main pushing device B is driven, the excavator C is propelled while excavating the natural ground. Along with this propulsion, laser light is irradiated along the planned laying line of the pipe line to form a spot on the target 28. The target 28 is photographed by the television camera 29, and the image signal is transmitted to a control device installed on the ground and displayed.
[0041]
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 transmission device A inserted through the propulsion pipe 1 are mounted on the main pushing device. Put. Then, the removed 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.
[0042]
By repeating the above operation, it is possible to sequentially propel new propulsion pipe 1 and thrust transmission device A. In particular, when connecting the thrust transmission device A inserted in the new propulsion tube 1 to the thrust transmission device A inserted in the propelled tube 1 that has already been propelled, the bolts 9 are connected to the connection portion 6 and the collar 8 of the end plate 4. It is necessary that the screw 7 is inserted into the screw 7 constituting the connecting portion 6 of the end plate 5 and is fastened and screwed with a gap between the collar 8 and the end plate 4. The thrust generated from the main pushing device B is transmitted when the end plate 4 attached to the transmission member 2 of the subsequent thrust transmission device A comes into contact with the end plate 5 of the preceding thrust transmission device A, and the thrust transmission device A Are sequentially transmitted to the excavator C.
[0043]
In the propulsion process, laser light is always emitted from the starting shaft along the planned laying line of the pipeline. This laser light reaches the target 28 of the excavator C through the open portion 2a of the transmission member 2 inserted through the propulsion pipe 1. In particular, since the open portion 2a is formed in the transmission member 2, a continuous space having a width of the open portion 2a and a 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. The light is irradiated to the target 28 without being disturbed. Moreover, since the position of the spot on the target 28 changes when the excavator C deviates from the planned laying line, the operator operates the jack 23 so that the spot is returned to the original position. Propulsion along the line is possible.
[0044]
When the excavator C arrives at the arrival shaft, the excavator C is recovered from the arrival shaft. Further, the thrust transmission device A inserted through the propulsion pipe 1 is pulled back to the start shaft side.
[0045]
When the thrust transmission device A is pulled back, the transmission member 2 constituting the thrust transmission device A is formed with the open portion 2a over the entire length, so that the wires, hoses, and tubes placed on the shelf 3 Can be recovered from the shelf 3 at the same time as the thrust transmission device A is pulled back to the starting shaft. For this reason, it is possible to collect | recover continuously the electric wires and hoses which have flexibility by winding a drum. Even pipes can be easily detached as they are, and the collecting operation can be performed very easily.
[0046]
【The invention's effect】
As described above in detail, the thrust transmission device according to the present invention has an open part extending over the entire length and a shelf corresponding to the open part provided in a part of the outer periphery of the transmission member. Can be arranged in an orderly manner. For this reason, when the thrust transmission device is returned to the shaft after laying the pipe to be propelled, the electric wires, hoses and pipes placed on the shelf are exposed and can be collected very easily.
[0047]
In addition, since the collar is inserted into the connection part so that it is screwed with play, even if the continuous thrust transmission device is refracted, this refraction can be allowed and the deviation in the propulsion direction is possible. If the tube to be propelled meanders and the thrust transmission device can refract, it can absorb the meandering and can be smoothly propelled.
[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 a configuration of a thrust transmission device.
FIG. 3 is a diagram for explaining the configuration of a thrust transmission device, and is a cross-sectional view taken along the line III-III in FIG. 1;
4 is a diagram for explaining a configuration of a thrust transmission device, and is a view taken along arrows IV-IV in FIG. 1;
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 for explaining electric wires and pipes placed on a shelf of a thrust transmission device during propulsion.
FIG. 8 is a diagram showing another example of a thrust transmission device.
FIG. 9 is a diagram illustrating an example of an excavating machine.
[Explanation of symbols]
A thrust transmission device B main pushing device C excavator 1 propulsion pipe 2 transmission member 2a opening 2b, 2c notch 3 shelf 3a support piece 3b machine screw 4, 5 end plate 4a, 5a groove 6 connection 6a, 6b bolt hole 7 Screw 8 Color 9 Bolt
10 Sliding plate
11 Screw
12 Spacer
13 Mud pipe
13a, 14a outlet
13b, 14b
13c, 14c groove
14 Waste pipe
15 O-ring
16 Locking piece
21 Shield body
22 Tail shield
23 Jack
24 Bulkhead
25 Cutting room
26 cabin
27 Cutter head
28 targets
29 TV camera
30 Connection pipe
31 nozzles
32 power lines
33 Signal line
34 Transmission line
35 Hydraulic hose
37 Water stop valve
38 Lubricant supply pipe

Claims (1)

A thrust transmission device that is disposed inside a tube to be propelled and transmits thrust from a main pushing device to a leading conductor, has a length corresponding to the length of the tube to be propelled, and has a total length on a part of the outer periphery. A transmission member formed with an open portion, an end plate attached to both ends of the transmission member and formed with a U-shaped groove corresponding to the open portion formed in the transmission member, and one of the end plates A screw hole or a bolt hole through which the screw passes is formed, and a connecting portion for connecting to another thrust transmission device that is configured to be refractable on the other end plate and a ring-shaped groove on the outer periphery are formed. The ring-shaped groove is engaged with a locking piece formed on the transmission member, and at least one end in the longitudinal direction is placed on the bottom of each U-shaped groove formed on the end plate. and the tube and formed in the longitudinal direction of the transmission member at the top of the tube Thrust transmitting apparatus characterized by having a ledge.

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