JP2020148256A - Driving force transmission device for earthquake-resistant pipe propulsion laying method - Google Patents

Abstract

To provide a driving force transmission device for earthquake-resistant pipe propulsion laying method that the driving force transmission device can be equipped to a grafting spout of succeeding pipe on ground and can check the fitting state of rubber band into a groove for rubber band of a socket.SOLUTION: A device consists of a plurality of driving force transmission means 13 and ring-like clamping means 12 fixed to an outside peripheral surface of a spout 3. The driving force transmission means 13 consists of: a driving force transmission member 17 contacting to an edge face 1a of a socket 1 and transmitting push-in force of a succeeding pipe 5 to a preceding pipe 2; a bracket 18 fixed to the clamping means 12; a wheel 20 as a supporting member supporting the succeeding pipe 5 in a shell pipe; and a fixed shaft 21 fixing the wheel 20 to the bracket 18 and attached to the bracket 18 at one end.SELECTED DRAWING: Figure 1

Description

According to the present invention, a propulsion force transmission device for a seismic tube propulsion laying method, particularly a propulsion force transmission device on the ground, can be attached to an insertion port of a trailing pipe, and even after the propulsion force transmission device is attached. The present invention relates to a propulsion force transmission device for a seismic pipe propulsion laying method, which has an effect that the fitted state of a rubber ring can be confirmed by a check gauge.

In recent years, there have been few problems such as traffic obstacles due to road construction and disposal of excavated soil, and pipes can be laid even in places where excavation work cannot be performed, such as under tracks. Has been done.

An example of a sheath pipe type seismic tube propulsion laying method is disclosed in Patent Document 1. Hereinafter, this sheath pipe type seismic tube propulsion laying method is referred to as a conventional propulsion laying method, and will be described with reference to the drawings.

9 is a partial cross-sectional view showing a joint in which an insertion port is inserted into a socket by a conventional propulsion laying method, FIG. 10 is a sectional view taken along line AA of FIG. 9, and FIG. 11 is a plan view showing a check gauge. , FIG. 12 is a cross-sectional view showing a method of confirming the inserted state of the rubber ring by the check gauge.

9 to 12, 31 is a socket for the leading pipe 32, 33 is an insertion port for the trailing pipe 35 having a retaining protrusion 34 formed at the tip thereof, and 36 is an inner peripheral surface of the socket 31. The lock ring 39 fitted in the formed lock ring groove 37 via the centering ring 38 is a rubber ring fitted in the rubber ring groove 40 formed on the inner peripheral surface of the receiving port 31. , 41 are propulsion force transmission devices.

The propulsion force transmission device 41 includes a protective ring 42 applied to the end face of the receiving port 31 to prevent the grout material from entering the joint portion, and a wheel 44 fixed to the insertion port 33 and rolling in the sheath pipe 43. It is composed of a flange 46 to which a bolt 45 is attached and which can be connected in a ring shape by a bolt 45, and a ring-shaped thrust transmitting member 47 interposed in an insertion port 33 between the protective ring 42 and the flange 46.

The thrust transmission member 47 is made of a foamed resin such as polystyrene or polyurethane and does not plastically deform with respect to the propulsive force of the trailing pipe at the time of pipe joining, whereby the propulsive force is transmitted to the leading pipe, while It is plastically deformed by an excessive pushing force due to an earthquake or the like, which enables the joint to contract and has a function of preventing the pipe from breaking.

In order to join the pipes by the conventional propulsion laying method, the protective ring 42 of the propulsion force transmission device 41 and the thrust transmission member 47 are inserted into the insertion port 33 of the trailing pipe 35 in advance, and then the trailing pipe 35 is underground. It is hung from the above and fitted into the receiving port 31 of the leading pipe 32. Next, the flange 46 of the propulsion force transmission device 41 is temporarily tightened to the insertion port 33 with a bolt 45, the thrust transmission member 47 is brought into close contact with the end face of the receiving port 1 via the protective ring 42, and the flange 46 is attached with the bolt 45. Tighten.

In this way, the leading pipe 32 and the trailing pipe 35 are joined in a state where the contraction allowance T (see FIG. 9) is maintained at the joint portion.

Japanese Unexamined Patent Publication No. 2002-295723

According to the conventional propulsion laying method described above, the thrust transmitting member 47 does not plastically deform with respect to the propulsive force of the trailing pipe 35 at the time of pipe joining, so that the propulsive force can be transmitted to the leading pipe 32.

On the other hand, the thrust transmitting member 47 is plastically deformed in response to an excessive pushing force due to an earthquake or the like, and as a result, the joint portion can be contracted. In this way, the seismic function of the pipe is maintained. However, there are the following problems.

The insertion port 33 is inserted into the receiving port 31 against the elastic force of the rubber ring 39 fitted in the rubber ring groove 40, and at this time, the fitting position of the rubber ring 39 into the rubber ring groove 40. If it is displaced, the water blocking effect at the joint may be impaired. Therefore, it is important to confirm whether or not the rubber ring 39 is accurately fitted in the rubber ring groove 40 after fitting the insertion port 33 into the receiving port 31.

After fitting the insertion port 33 into the receiving port 31, the rubber ring 39 is accurately fitted into the rubber ring groove 40, and a dedicated check gauge 48 as shown in FIG. 11 is used to check whether or not the rubber ring 39 is in the correct position. Made using. That is, as shown in FIG. 12, the rubber ring 39 is in the correct position according to the insertion length b (see FIG. 11) of the check gauge 48 inserted from the socket 31 along the insertion slot 33 and to the end face of the socket 31. Judge whether or not.

In the conventional propulsion laying method, the confirmation work by the check gauge 48 cannot be performed after the propulsion force transmission device 41 is attached to the insertion port 33. This is because, after the propulsive force transmission device 41 is attached to the insertion port 33, there is no gap for inserting the check gauge 48 between the inner peripheral surface of the flange 46 and the outer peripheral surface of the insertion port 33.

As a result, in the conventional propulsion laying method, the propulsion force transmission device 41 must be after the trailing pipe 35 is suspended underground and the insertion port 33 of the trailing pipe 35 is fitted into the receiving port 31 of the leading pipe 32. , Could not be attached to the insertion port 33.

If the propulsion force transmission device 41 can be mounted on the ground, the propulsion force transmission device 41 can be mounted and the insertion port 33 can be fitted into the receiving port 31 underground. As a result of being able to attach the propulsion force transmission device 41 to the insertion port 33 of the trailing pipe 35, the entire work time required for pipe joining is shortened. In particular, the work time performed underground is greatly reduced.

Further, the installation work of the propulsion force transmission device 41 underground requires time because the work space is narrow, but if the installation work of the propulsion force transmission device 41 can be performed on the ground, the insertion port 33 to the socket 31 is underground. Since only the fitting work and the confirmation work with the check gauge 48 are required, the entire work time required for pipe joining is shortened. In particular, the work time performed underground is greatly reduced.

Further, according to the conventional propulsion laying method, the wheels 44 that roll in the sheath pipe 43 are attached around the bolts 45 that connect the flanges 46 in a ring shape, so that the weight of the preceding pipe 32 and the pipe propulsion As a result of the resistance acting on the bolt 45, the tightening force of the bolt 45 may be affected, and the fixing force of the flange 46 to the insertion port 33 may decrease.

Therefore, an object of the present invention is that the propulsion force transmission device can be mounted on the ground at the insertion port of the trailing pipe, and even after the propulsion force transmission device is mounted, the fitted state of the rubber ring is checked by a check gauge. As a result, the work time required for pipe joining can be shortened, and there is no risk that the fixing force of the tightening means to the insertion port will decrease due to the weight of the preceding pipe and the pipe propulsion resistance. The purpose is to provide a propulsion force transmission device for the propulsion laying method.

The present invention has been made to achieve the above object, and is characterized by the following.

The invention according to claim 1 is a seismic pipe propulsion for laying a new pipe in the sheath pipe by sequentially pushing the pipes joined by fitting the insertion port of the trailing pipe into the socket of the preceding pipe into the sheath pipe. In the propulsion force transmission device used in the laying method, a plurality of propulsion force transmission means arranged at intervals along the outer peripheral surface of the insertion port and a ring shape fixed to the outer peripheral surface of the insertion port. The propulsive force transmitting means includes a propulsive force transmitting member that abuts on the end surface of the receiving port and transmits the pushing force of the trailing pipe to the preceding pipe, and a bracket fixed to the tightening means. A support member that supports the trailing pipe in the sheath pipe and a fixed shaft that fixes the support member to the bracket, one end of which is attached to the bracket, and the other end of the fixed shaft is the propulsion. The elongated hole, which is inserted into one end of the elongated hole formed in the force transmitting member so as not to be pulled out and the other end of the fixed shaft is inserted, is partitioned by a partition wall, and the tightening means and the end surface of the receiving port are A gap is formed between the two, and when an excessive pushing force is applied to the propulsive force transmitting member, the partition wall is broken by the fixed shaft.

The invention according to claim 2 is characterized in that, in the invention according to claim 1, the tightening means includes one band and a tightening tool for tightening the band.

The invention according to claim 3 is characterized in that, in the invention according to claim 1, the tightening means includes a plurality of bands and a tightening tool for tightening the bands.

The invention according to claim 4 is characterized in that, in the invention according to claim 2 or 3, the fastener comprises a bolt passed between the ends of the band and a nut screwed onto the bolt. It has.

The invention according to claim 5 is characterized in that, in the invention according to any one of claims 1 to 4, the number of the propulsive force transmitting means is two or more.

The invention according to claim 6 is the invention according to any one of claims 1 to 5, wherein the support member is composed of wheels.

The invention according to claim 7 is characterized in that, in the invention according to any one of claims 1 to 6, a groove for breaking is formed in the partition wall.

The invention according to claim 8 is the invention according to any one of claims 1 to 7, wherein the tip end portion of the propulsion force transmitting member is bent so as to be in contact with the end face of the receiving port. It has characteristics.

According to the present invention, a plurality of propulsive force transmitting means are arranged at intervals along the outer peripheral surface of the insertion port, and a gap is formed between the tightening means and the end surface of the receiving port to propel the thrust on the ground. Even after the force transmission device is attached to the insertion port of the trailing pipe, the fitted state of the rubber ring can be confirmed by the check gauge, so that the propulsion force transmission device can be attached on the ground. As a result, the work of attaching the propulsion force transmission device and the work of fitting the insertion port into the socket in the basement can be performed separately, so that the propulsion force transmission device can be attached to the insertion holes of multiple trailing pipes on the ground. You can do it. As a result, the total work time required for pipe joining is shortened. In particular, the work time performed underground is greatly reduced.

Further, according to the present invention, the installation work of the propulsion force transmission device underground requires time because the work space is narrow, but the installation work of the propulsion force transmission device can be performed on the ground, so that the installation work of the propulsion force transmission device can be performed underground. All you have to do is insert the insertion slot and check with the check gauge. As a result, the total work time required for pipe joining is shortened. In particular, the work time performed underground is greatly reduced.

Further, according to the present invention, by separating the tightening means and the propulsive force transmitting member, the force relationship between the fixing force by the tightening means and the strength of the partition wall of the propulsive force transmitting member is set separately in advance. Therefore, even if the fastening force of the band of the tightening means varies during work, the strength of the propulsive force transmitting member that receives the propulsive force can be maintained constant.

Further, according to the present invention, since the tightening bolt of the band of the tightening means is not coaxial with the wheel shaft of the wheel which is the support member, the problem in the case of coaxial, that is, the pipe weight and the propulsion resistance become the bolt. There is no problem of applying a load and affecting the fixing force to the pipe. That is, by using a separate axis, the initial fixing force can be maintained even if there is behavior during propulsion.

Further, according to the present invention, when an excessive pushing force is applied to the propulsive force transmitting member, the partition wall is broken to allow displacement of the insertion port in the pushing direction, and the tightening means is provided with respect to the insertion port. Since it is not a slippery structure, there is no risk of damaging the outer peripheral surface of the pipe.

Further, according to the present invention, since the wheel as a support member exists immediately after the pipe joint, it is easy to respond to a trajectory change such as when the sheath pipe is curved, and the followability is improved. In the conventional propulsion laying method, there is a thrust transmission device (see Fig. 9) at the rear of the thrust transmission member, and the wheels are installed on it. Therefore, since the wheels are located far from the pipe joint, the bent part or the like Poor followability of the trailing pipe to the leading pipe.

Further, according to the present invention, since the diameter of the wheel can be increased by not providing the wheel on the outer surface of the band of the propulsion force transmitting device, the rolling frictional resistance of the wheel can be reduced accordingly. It is advantageous for propulsion transmission.

It is a partial cross-sectional perspective view which shows the pipe joint part which attached the propulsion force transmission device for seismic pipe propulsion laying method of this invention. It is another partial cross-sectional perspective view which shows the pipe joint part which attached the propulsion force transmission device for seismic tube propulsion laying method of this invention. It is sectional drawing which shows the pipe joint part which attached the propulsion force transmission device for the seismic tube propulsion laying method of this invention. It is a perspective view which shows the propulsion force transmission device for the seismic tube propulsion laying method of this invention. It is a partial perspective view which shows the propulsion force transmission device for the seismic tube propulsion laying method of this invention. It is a perspective view which shows the propulsion force transmission member of the propulsion force transmission device for seismic tube propulsion laying method of this invention. It is a perspective view which shows the pipe joint part which attached the propulsion force transmission device for the seismic tube propulsion laying method of this invention in a sheath pipe. It is a cross-sectional view which shows the moving state of a propulsion force transmission member when an excessive pushing force acts on a propulsion force transmission member, (a) shows the state before breaking of a partition wall, and (b) is a partition. The state after the destruction of the wall is shown, and (c) shows the state where the movement of the propulsion force transmitting member is completed. It is a partial cross-sectional view which shows the pipe joint part which inserted the insertion opening in the socket by the conventional propulsion laying method. 9 is a cross-sectional view taken along the line AA of FIG. It is a top view which shows the check gauge. It is sectional drawing which shows the method of confirming the insertion state of the rubber ring by a check gauge.

Next, an embodiment of the propulsion force transmission device for the seismic tube propulsion laying method of the present invention will be described with reference to the drawings.

FIG. 1 is a partial cross-sectional perspective view showing a pipe joint equipped with the propulsion force transmission device for the seismic tube propulsion laying method of the present invention, and FIG. 2 is a partial cross-sectional perspective view showing the propulsion force transmission device for the seismic tube propulsion laying method of the present invention. Another partial cross-sectional perspective view showing the pipe joint, FIG. 3 is a cross-sectional view showing the pipe joint equipped with the propulsion force transmission device for the seismic pipe propulsion laying method of the present invention, and FIG. 4 is the seismic pipe of the present invention. A perspective view showing the propulsion force transmission device for the propulsion laying method, FIG. 5 is a partial perspective view showing the propulsion force transmission device for the seismic tube propulsion laying method of the present invention, and FIG. 6 is a propulsion for the seismic tube propulsion laying method of the present invention. It is a perspective view which shows the propulsion force transmission member of a force transmission device.

1 to 6, 1 is a socket of the leading pipe 2, 3 is an insertion port of a trailing pipe 5 having a retaining protrusion 4 formed at the tip, and 6 is an inner peripheral surface of the socket 1. The lock ring 9 is fitted into the formed lock ring groove 7 (see FIG. 3) via the centering ring 8. The rubber ring groove 10 (FIG. 3) is formed on the inner peripheral surface of the receiving port 1. The rubber ring 11 fitted in (see 3) is the propulsion force transmitting device of the present invention.

The propulsion force transmission device 11 of the present invention includes a ring-shaped tightening means 12 mounted on the outer peripheral surface of the insertion port 3 and a plurality of propulsion force transmission devices 11 arranged at intervals along the outer peripheral surface of the insertion port 3 (in this example). It is composed of three) propulsion force transmitting means 13.

The tightening means 12 includes one band 14, a bolt 15 and a nut 16 as tightening tools for tightening the band 14. The bolt 15 is passed through both ends of the band 14, and the band 14 is tightened by tightening the nut 16 screwed into the bolt 15. The tightening means 12 may have a plurality of bands 14 connected to each other in a ring shape by bolts 15 and nuts 16 as tightening tools.

The propulsion force transmitting means 13 includes a propulsion force transmitting member 17 that abuts on the end surface 1a of the receiving port 1 and transmits the pushing force of the trailing pipe 5 to the leading pipe 2, and a bracket 18 fixed to the outer surface of the tightening means 12. From the wheel 20 as a support member for supporting the trailing pipe 5 in the sheath pipe 19 (see FIG. 7) and the fixed shaft 21 having one end attached to the bracket 18 for rotatably fixing the wheel 20 to the bracket 18. It has become. The tip of the propulsion force transmitting member 17 is bent at a right angle so as to come into contact with the end surface 1a of the receiving port 1.

The fixed shaft 21 is made of a bolt, and the other end of the fixed shaft 21 is inserted into one end of an elongated hole 17a formed in the propulsion force transmitting member 17 so as not to be pulled out by a nut 22. The elongated hole 17a into which the other end of the fixed shaft 21 is inserted is partitioned by a partition wall 23 that breaks due to an excessive pushing force, whereby the other end of the fixed shaft 21 is inserted into the elongated hole 17a of the propulsive force transmitting member 17. The propulsion force transmitting member 17 is held and can be retracted by the length of the elongated hole 17a with respect to the bracket 18 when the partition wall 23 is broken by an excessive pushing force. The partition wall 23 may be formed integrally with the propulsion force transmitting member 17 or may be a separate body. Further, a groove for breaking may be formed in the partition wall 23.

By configuring the propulsion force transmitting means 13 as described above, a gap (T1) (see FIG. 3) for inserting the check gauge 48 is formed between the tightening means 12 and the end surface 1a of the receiving port 1. To.

Further, since the wheel 20 is not attached around the bolt 15 of the tightening means 12, the weight of the preceding pipe 2 and the pipe propulsion resistance do not act on the bolt 15. As a result, there is no risk that the fixing force of the tightening means 12 to the insertion port 3 will decrease. That is, by using a separate axis, the initial fixing force can be maintained even if there is behavior during propulsion.

Next, a seismic tube propulsion laying method using the propulsion force transmission device 11 of the present invention will be described.

In order to join the pipes by the seismic pipe propulsion laying method using the propulsion force transmission device 11 of the present invention, the propulsion force transmission device 11 is fixed to the insertion port 3 of the trailing pipe 5 on the ground. That is, the band 14 of the tightening means 12 is tightened by the bolt 15 and the nut 16, and the propulsive force transmission device 11 is fixed to the insertion port 3.

The fixed position of the propulsion force transmitting device 11 is a position where the pipe joint between the leading pipe 2 and the trailing pipe 5 can be expanded and contracted when the insertion port 3 is fitted into the receiving port 1, and the propulsive force transmitting means 13 The position where the tip portion abuts on the end surface 1a of the receiving port 1 is set.

In this way, after the propulsive force transmission device 11 is fixed to the insertion port 3 of the trailing pipe 5 on the ground, the trailing pipe 5 is hung underground and fitted into the receiving port 1 of the leading pipe 2. As a result, the leading pipe 2 and the trailing pipe 5 are joined in a state where the contraction allowance T2 (see FIG. 3) is maintained at the pipe joining portion.

After joining the leading pipe 2 and the trailing pipe 5 in this way, the check gauge 48 (see FIG. 10) is fitted with a gap (T1) (see FIG. 3) between the tightening means 12 and the end surface 1a of the receiving port 1. It is inserted into the socket 1 to determine whether or not the rubber ring 9 is in the correct position (see FIG. 12).

In this way, the check gauge 48 can be inserted all around the receiving port 1 until it reaches the rubber ring 9, so that the check gauge 48 can reliably confirm the fitted state of the rubber ring 9.

Since the propulsion force transmission device 11 can be mounted on the ground in this way, the propulsion force transmission device 11 mounting work and the underground fitting work of the insertion port 3 into the receiving port 1 can be performed separately. As a result, since the propulsion force transmission device 11 can be attached to the insertion port 3 of the plurality of trailing pipes 5 on the ground, the total work time required for pipe joining is shortened. In particular, the work time performed underground is greatly reduced.

Further, the installation work of the propulsion force transmission device 11 underground requires time because the work space is narrow, but since the installation work of the propulsion force transmission device 11 can be performed on the ground, the insertion port 3 to the socket 1 is underground. Only the fitting work and the confirmation work with the check gauge 48 are required. As a result, the total work time required for pipe joining is shortened. In particular, the work time performed underground is greatly reduced.

According to the seismic pipe propulsion laying method using the propulsion force transmission device 11 of the present invention, the propulsive force of the trailing pipe 5 when laying the pipe in the sheath pipe 19 is applied to the insertion port 3 of the trailing pipe 5. It can be transmitted to the leading pipe 2 by the propulsion force transmitting member 17 attached via the tightening means 12. That is, as shown in FIG. 8A, the propulsive force transmitting member 17 can be transmitted to the leading pipe 2 by abutting on the end surface 1a of the receiving port 1.

On the other hand, when an excessive pushing force exceeding the propulsive force of the pipe acts on the pipe joint due to an earthquake or the like, it is inserted into the elongated hole 17a of the propulsive force transmitting member 17 as shown in FIG. 8 (b). The fixed shaft 21 breaks the partition wall 23 and retracts by the length of the elongated hole 17a as shown in FIG. 8C. As a result, the pipe joint contracts by the contraction allowance T2 (see FIG. 3).

Further, when an excessive tensile force acts on the pipe joint, the pipe joint extends until the retaining protrusion 4 of the insertion port 3 comes into contact with the lock ring 6. In FIG. 3, the extension allowance of the pipe joint is shown by T3.

In the seismic tube propulsion laying method using the propulsion force transmission device 11 of the present invention, even if there is no work space on the ground due to construction reasons, the propulsion force transmission device 11 in the underground can be operated in the same manner as the conventional method. It can also be installed.

As described above, according to the present invention, a plurality of propulsive force transmitting means 13 are arranged at intervals along the outer peripheral surface of the insertion port 3, and a gap is provided between the tightening means 12 and the end surface of the receiving port 1. By forming (T1), the fitted state of the rubber ring 9 can be confirmed by the check gauge 48 even after the propulsive force transmission device 11 is mounted on the insertion port 3 of the trailing pipe 5 on the ground. Therefore, the installation work of the propulsion force transmission device 11 can be performed on the ground. As a result, the work of mounting the propulsion force transmission device 11 and the work of fitting the insertion port 3 into the receiving port 1 underground can be performed separately, so that the propulsive force of a plurality of trailing pipes 5 to the insertion port 3 on the ground can be performed separately. The transmission device 11 can be attached. As a result, the total work time required for pipe joining is shortened. In particular, the work time performed underground is greatly reduced.

Further, according to the present invention, the installation work of the propulsion force transmission device 11 underground requires time because the work space is narrow, but the installation work of the propulsion force transmission device 11 can be performed on the ground, so that the socket is underground. All that is required is the work of fitting the insertion port 3 into 1 and the work of checking with the check gauge 48. As a result, the total work time required for pipe joining is shortened. In particular, the work time performed underground is greatly reduced.

Further, according to the present invention, by separating the tightening means 12 and the propulsive force transmitting member 17, the force relationship between the fixing force of the tightening means 12 and the strength of the partition wall 23 of the propulsive force transmitting member 17 can be determined. Since it is possible to separate and set in advance, it is possible to maintain a constant propulsive force even if the fastening force of the band 14 of the tightening means 12 varies during work.

Further, according to the present invention, since the tightening bolt 15 of the band 14 of the tightening means 12 is not coaxial with the axis of the wheel 20, the problem in the case of coaxial, that is, the pipe weight and the propulsion resistance put a load on the bolt. There is no problem of affecting the fixing force to the pipe. That is, by using a separate axis, the initial fixing force can be maintained even if there is behavior during propulsion.

Further, according to the present invention, when an excessive pushing force is applied to the propulsive force transmitting member 17, the partition wall 23 is broken to allow displacement of the insertion port 3 in the pushing direction, and the tightening means 12 is inserted. Since the structure does not slide with respect to the mouth 3, there is no risk of damaging the outer peripheral surface of the pipe.

Further, according to the present invention, since the wheel 21 as a support member exists immediately after the pipe joint, it is easy to respond to a change in track and the followability is improved.

Further, according to the present invention, the diameter of the wheel 20 can be increased by not providing the wheel 20 on the outer surface of the band 14 of the propulsion force transmitting device 11, so that the rolling frictional resistance of the wheel 20 can be reduced accordingly. It is advantageous for propulsion transmission.

1: Receptacle 1a: End face 2: Preceding pipe 3: Insertion port 4: Protrusion for retaining 5: Trailing pipe 6: Lock ring 7: Groove for lock ring
8: Centering ring 9: Rubber ring 10: Rubber ring groove 11: Propulsion force transmission device of the present invention 12: Tightening means 13: Propulsion force transmission means 14: Band 15: Bolt 16: Nut 17: Propulsion force transmission member 17a: Long hole 18: Bracket 19: Scabbard 20: Wheel 21: Fixed shaft 22: Nut 23: Partition wall 31: Receptacle 32: Leading pipe 33: Insertion 34: Retaining protrusion 35: Trailing pipe 36: Lock Ring 37: Lock ring groove 38: Centering ring 39: Rubber ring 40: Rubber ring groove 41: Propulsion force transmission device 42: Protective ring 43: Sheath tube 44: Wheel 45: Bolt 46: Flange 47: Thrust transmission Member 48: Check gauge

Claims (8)

Propulsion transmission used in the seismic tube propulsion laying method in which new pipes are laid in the sheath pipe by sequentially pushing the pipes joined by fitting the insertion port of the trailing pipe into the socket of the preceding pipe into the sheath pipe. In the device
The propulsive force transmitting means is composed of a plurality of propulsive force transmitting means arranged at intervals along the outer peripheral surface of the insertion port and a ring-shaped tightening means fixed to the outer peripheral surface of the insertion port. Supports the trailing pipe in the sheath pipe, a propulsion force transmitting member that comes into contact with the end face of the receiving port and transmits the pushing force of the trailing pipe to the leading pipe, a bracket fixed to the tightening means, and the sheath pipe. It consists of a support member and a fixed shaft having one end attached to the bracket for fixing the support member to the bracket, and the other end of the fixed shaft is one end of an elongated hole formed in the propulsive force transmission member. The elongated hole into which the other end of the fixed shaft is inserted is partitioned by a partition wall, and a gap is formed between the tightening means and the end face of the receiving port to form the propulsion. A propulsion force transmission device for a seismic pipe propulsion laying method, characterized in that the partition wall is broken by the fixed shaft when an excessive pushing force is applied to the force transmission member. The propulsive force transmission device for a seismic tube propulsion laying method according to claim 1, wherein the tightening means includes one band and a tightening tool for tightening the band. The propulsion force transmission device for a seismic tube propulsion laying method according to claim 1, wherein the tightening means includes a plurality of bands and a tightening tool for tightening the bands. The propulsive force for the seismic tube propulsion laying method according to claim 2 or 3, wherein the fastener comprises a bolt passed between the ends of the band and a nut screwed into the bolt. Transmission device. The propulsion force transmission device for a seismic tube propulsion laying method according to any one of claims 1 to 4, wherein the propulsion force transmission means is two or more. The propulsion force transmission device for a seismic tube propulsion laying method according to any one of claims 1 to 5, wherein the support member is composed of wheels. The propulsion force transmission device for a seismic tube propulsion laying method according to any one of claims 1 to 6, wherein a groove for breaking is formed in the partition wall. The propulsive force for the seismic tube propulsion laying method according to any one of claims 1 to 7, wherein the tip end portion of the propulsive force transmitting member is bent so as to abut the end surface of the receiving port. Transmission device.

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