JP7284027B2 - Propulsion power transmission device for jacking laying method - Google Patents

Description

This invention is a propulsion laying method in which the pipes joined by fitting the insertion port of the trailing pipe into the socket of the leading pipe are sequentially pushed into a sheath pipe laid in advance in the ground, and a new pipe is laid in the sheath pipe. The present invention relates to a propulsion transmission device for a construction method, which is fixed to the outer peripheral surface of an insertion port and transmits the propulsion force of a trailing pipe to a leading pipe.

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

Patent Document 1 discloses an example of a propulsion force transmission device used in the sheath tube type propulsion laying method. Hereinafter, this propulsion force transmission device will be referred to as a conventional propulsion force transmission device.

A conventional propulsion transmission device includes a fixed member attached to the outer peripheral surface of a trailing pipe by connecting an arc-shaped member in a circular ring shape with bolts and nuts, and an elastic member attached to the fixed member via an elastic body. a thrust transmission member abutting the tube receptacle flange.

According to the conventional propulsion force transmission device, the elastic body intervening between the propulsion force transmission member and the fixed member provides a cushion of the elastic body even when the condition of the propulsion pipeline is complicated and the curve propulsion is repeated. Due to the effect and the restoring force, the propulsive force can always be reliably transmitted, and the pipe can be propelled while following the propulsion pipeline.

A method of fixing a conventional propulsion transmission device consists of first joining a trailing pipe to a leading pipe, then temporarily fixing a fixing member to which the propulsive force transmission member is pre-fixed to the outer peripheral surface of the insertion port of the trailing pipe, and then The fixing member is moved until the tip of the propulsive force transmission member comes into contact with the flange of the receiving port of the leading pipe, and finally the bolt and nut are fully tightened for fixing.

In this way, the leading pipe and the trailing pipe are joined while maintaining the contraction allowance at the joint.

JP 2011-32632 A

According to the construction method using the conventional propulsion laying device described above, the fixing member is attached to the outer peripheral surface of the trailing pipe by connecting the arc-shaped member in a circular ring shape with bolts and nuts, and is fixed via an elastic body. The propulsive force transmission member attached to the member can always and reliably transmit the propulsive force to the leading pipe regardless of the state of the propulsion pipe, and the pipe can be propelled while ensuring the earthquake resistance of the pipe.

However, when the fixing member is attached to the outer peripheral surface of the trailing pipe, the arc-shaped members are connected in a circular ring shape with bolts and nuts. Before the propulsion is completed, slippage occurs between the outer peripheral surface of the pipe and the fixed member, and the insertion port of the trailing pipe enters the socket of the leading pipe, so that the contraction margin can be maintained at the joint. There is a problem that the earthquake resistance of the pipe is impaired.

Accordingly, the present invention provides a propulsion force transmission device for a jacking laying method that includes a ring-shaped band attached to the outer peripheral surface of an insertion port, and that does not cause slippage between the band and the outer peripheral surface of the insertion port during propulsion. intended to provide

In order to solve the above-mentioned problems, the invention according to claim 1 sequentially pushes the pipes joined by fitting the insertion port of the trailing pipe into the receiving port of the leading pipe into the sheath pipe, thereby forming the new pipe as described above. A propulsion force transmission device for a jacking laying method that is used in a jacking laying method for laying in a sheath pipe and is fixed to the outer peripheral surface of the insertion opening, comprising a ring-shaped band attached to the outer peripheral surface of the insertion opening, The band includes a propulsion force transmission portion that abuts on the end face of the socket and transmits the pushing force of the trailing pipe to the leading pipe, and an attachment of the band when the pushing force exceeds a predetermined force. posture changing means for changing the posture, wherein the posture changing means divides the band into two regions by a straight line passing through the center in the cross section perpendicular to the axis, and the inner peripheral surface of one of the regions. a frictional force increasing portion formed on at least a portion of the inner peripheral surface to increase the frictional force with the contact surface of the insertion opening compared to other portions of the inner peripheral surface; and a deformation portion that deforms when the predetermined force is exceeded .

According to the second aspect of the invention, the pipes joined by inserting the insertion port of the trailing pipe into the receiving port of the leading pipe are sequentially pushed into the sheath pipe, and a new pipe is laid in the sheath pipe. and fixed to the outer peripheral surface of the spigot, comprising a ring-shaped band attached to the outer peripheral surface of the spigot, wherein the band is attached to the end face of the receptacle a propulsive force transmitting portion that abuts on the trailing pipe to transmit the pushing force of the trailing pipe to the leading pipe; and posture changing means that changes the mounting posture of the band when the pushing force exceeds a predetermined force. , wherein the posture changing means is formed on at least a part of the inner peripheral surface of one of the two regions when the band is divided into two regions by a straight line passing through the center in the cross section perpendicular to the axis, A frictional force increasing portion that increases the frictional force with the contact surface of the insertion port more than other portions of the inner peripheral surface, and is formed in the propulsive force transmitting portion, and when the pushing force exceeds the predetermined force. and a deformation portion that deforms into.

The invention according to claim 3 is the propulsion force transmission device for the jacking laying method according to claim 2 , wherein the first contact part protrudes in the axial direction from the end surface of the band. do.

According to a fourth aspect of the present invention, there is provided the propulsive force transmission device for a jacking construction method according to the second aspect, wherein the first contact portion axially protrudes from the outer peripheral surface of the band. and

The invention according to claim 5 is the propulsion force transmission device for the jacking laying method according to claim 1 , wherein the propulsion force transmission parts are arranged at intervals along the outer peripheral surface of the insertion opening. The thrust transmission means comprises a plurality of thrust force transmission means, and the thrust force transmission means includes a thrust force transmission member that abuts on the end surface of the socket and transmits the pushing force of the trailing pipe to the leading pipe, and a thrust force transmitting member that is fixed to the band. a support member that supports the trailing pipe in the sheath pipe; and a fixed shaft that fixes the support member to the bracket and has one end attached to the bracket; is formed with an elongated hole extending in the axial direction of the band, the elongated hole is formed with a partition wall for fixing the fixed shaft to one end thereof, partitioning the elongated hole, and the other end of the fixed shaft. is inserted into one end of the long hole so as not to be pulled out, and the partition wall functions as the deformation portion.

The invention according to claim 6 is the propulsion force transmission device for the jacking laying method according to claim 4 , wherein the propulsion force transmission parts are arranged at intervals along the outer peripheral surface of the insertion opening. The thrust transmission means comprises a plurality of thrust force transmission means, and the thrust force transmission means includes a thrust force transmission member that abuts on the end surface of the socket and transmits the pushing force of the trailing pipe to the leading pipe, and a thrust force transmitting member that is fixed to the band. a support member that supports the trailing pipe in the sheath pipe; and a fixed shaft that fixes the support member to the bracket and has one end attached to the bracket; is formed with an elongated hole extending in the axial direction of the band, the elongated hole is formed with a partition wall for fixing the fixed shaft to one end thereof, partitioning the elongated hole, and the other end of the fixed shaft. is inserted into one end of the elongated hole so as not to be pulled out, and of the plurality of thrust force transmission means, the thrust force transmission means positioned in the other of the two regions contacts the first contact portion. characterized by having

The invention according to claim 7 is the propulsion force transmission device for the jacking construction method according to claim 5 or 6 , wherein the support member comprises a wheel.

The invention according to claim 8 is the thrust transmission device for a construction method according to any one of claims 5 to 7 , wherein the tip portion of the thrust transmission member is located at the end surface of the socket. It is characterized by being bent so as to abut.

According to a ninth aspect of the invention, there is provided the propulsive force transmission device for a jacking construction method according to any one of the first to eighth aspects, wherein a projection is formed on the frictional force improving portion. and

According to this invention, when the pushing force into the trailing tube from the rear becomes large and exceeds a predetermined force, the mounting posture of the band changes obliquely, thereby preventing the band from coming off the insertion port of the trailing tube. be able to.

FIG. 2 is a partially cross-sectional perspective view showing a pipe joint to which the propulsion force transmission device for the jacking construction method according to the first embodiment is mounted; 1 is a perspective view showing a propulsion force transmission device for a jacking construction method according to a first embodiment; FIG. FIG. 2 is a partial perspective view showing an enlarged claw portion of the propulsion force transmission device for the jacking construction method according to the first embodiment; 1 is a cross-sectional view of a propulsion force transmission device for a jacking construction method according to a first embodiment; FIG. FIG. 4 is a cross-sectional view in an initial state (first stage) showing a pipe joint to which the thrust transmission device for jacking construction method according to the first embodiment is mounted; (A) is a cross-sectional view of the second stage showing a pipe joint to which the propulsion transmission device for the jacking laying method according to the first embodiment is mounted, and (B) is a sectional view for the jacking laying method according to the first embodiment. 3C is a cross-sectional view of the third stage showing the pipe joint with the propulsion transmission device, and (C) is an enlarged cross-sectional view of the third stage near the partition wall 23. FIG. FIG. 11 is a perspective view showing a propulsion force transmission device for a jacking construction method according to a second embodiment; (A) is a cross-sectional view of the initial state (first stage) showing a pipe joint mounted with a propulsion transmission device for jacking laying method according to the second embodiment; (B) is a cross-sectional view according to the second embodiment; A cross-sectional view of the second stage showing a pipe joint equipped with a thrust transmission device for jacking laying method, (C) shows a pipe joint fitted with a thrust transmission device for jacking laying method according to the second embodiment. 3 is a cross-sectional view of the third stage shown; FIG. (A) is a perspective view showing a thrust transmission device for a jacking construction method according to a third embodiment, and (B) is a cross-sectional view of the thrust transmission device for a jacking construction method according to a third embodiment. (A) is a cross-sectional view of the initial state (first stage) showing a pipe joint to which a propulsion transmission device for a jacking construction method according to the third embodiment is attached; (B) is a cross-sectional view according to the third embodiment; Sectional view of the second stage showing a pipe joint equipped with a thrust transmission device for jacking laying method, (C) shows a pipe joint fitted with a thrust transmission device for jacking laying method according to the third embodiment. 3 is a cross-sectional view of the third stage shown; FIG. (A) is a partial cross-sectional perspective view showing a thrust transmission device for a jacking construction method according to a fourth embodiment, and (B) is a cross-sectional view of the thrust transmission device for a jacking construction method according to a fourth embodiment. . (A) is a cross-sectional view of the initial state (first stage) showing a pipe joint to which a propulsion transmission device for jacking laying method according to the fourth embodiment is attached; (B) is a cross-sectional view according to the fourth embodiment; Sectional view of the second stage showing a pipe joint equipped with a thrust transmission device for jacking laying method, (C) shows a pipe joint fitted with a thrust transmission device for jacking laying method according to the fourth embodiment. 3 is a cross-sectional view of the third stage shown; FIG.

[First embodiment]
Next, a first embodiment of the propulsion force transmission device for the jacking laying method according to the present invention will be described with reference to the drawings.

FIG. 1 is a partial cross-sectional perspective view showing a pipe joint to which a thrust transmission device for a jacking laying method (hereinafter sometimes referred to as a “thrust transmission device”) according to the first embodiment is installed, and FIG. 3 is a partial perspective view showing an enlarged claw portion of the thrust transmission device according to the first embodiment; FIG. 4 is the thrust according to the first embodiment; 1 is a cross-sectional view of a transmission device; FIG. FIG. 5 is a cross-sectional view of the initial state (first stage) showing a pipe joint to which the propulsive force transmission device according to the first embodiment is attached, and FIG. 6(A) is a propulsive force transmission according to the first embodiment. FIG. 6B is a cross-sectional view of the second stage showing the pipe joint with the device installed; FIG. 6B is a third-stage cross-sectional view showing the pipe joint with the propulsion transmission device according to the first embodiment; FIG. 6C is an enlarged cross-sectional view of the vicinity of the partition wall 23 in the third stage.

1 to 6, the propulsive force transmission device 11 according to the first embodiment includes a ring-shaped tightening means 12 mounted on the outer peripheral surface of the insertion port 3 of the trailing pipe 5, and a A plurality of (three in this example) propulsion force transmission means 13A, 13B, 13C (these may be collectively referred to as propulsion force transmission means 13) arranged at intervals along.

The tightening means 12 is composed of one band 14 and bolts 15 and nuts 16 as tightening tools for tightening the band 14 . A bolt 15 is passed through both ends of the band 14, and the band 14 is tightened by tightening a nut 16 screwed onto the bolt 15. As shown in FIG. The tightening means 12 may be formed by connecting a plurality of bands 14 to each other in a ring shape using bolts 15 and nuts 16 as tightening tools.

As shown in FIG. 3, a claw portion 24 is formed on the inner peripheral surface of the band 14 near the portion where the band 14 is tightened by the bolt 15 and nut 16 . The claw portion 24 is formed to increase the frictional force with the contact surface of the insertion opening 3 compared to other portions of the inner peripheral surface of the band 14 .

As shown in FIG. 4, when the band 14 is divided into two regions by a straight line L passing through the center O in the cross section perpendicular to the axis, one region (the region below the straight line L in FIG. 4) is defined as the “first area", and the other area (the area above the straight line L in FIG. 4) is called the "second area". The claw portion 24 and the thrust force transmission means 13A, 13B are provided in the first region of the band 14, and the thrust force transmission means 13C is provided in the second region of the band 14. As shown in FIG. Note that the propulsive force transmission means 13C may be provided at another position in the second area. In FIG. 4, the straight line L is set horizontally, but if it is to be separated from the area excluding the claw portion 24, the area may be divided at an angle from the horizontal.

The thrust force transmission means 13 is fixed to the thrust force transmission member 17 which abuts on the end surface 1a of the socket 1 of the leading pipe 2 and transmits the pushing force of the trailing pipe 5 to the leading pipe 2, and the outer peripheral surface of the tightening means 12. a bracket 18, a wheel 20 as a support member for supporting the trailing pipe 5 in a sheath pipe (not shown), and a fixed shaft with one end attached to the bracket 18 for rotatably fixing the wheel 20 to the bracket 18. 21. A tip portion of the propulsive force transmission member 17 is bent so as to abut on the end surface 1a of the socket 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 propulsive force transmission member 17 by a nut 22 so that the fixed shaft 21 cannot be pulled out. The elongated hole 17a into which the other end of the fixed shaft 21 is inserted is partitioned by a partition wall 23 (see FIG. 5), whereby the other end of the fixed shaft 21 is held in the elongated hole 17a of the propulsive force transmission member 17. ing. The partition wall 23 may be formed integrally with the propulsive force transmission member 17, or may be formed separately.

The insertion port 3 of the trailing pipe 5 has a retaining projection 4 formed at the tip thereof. A lock ring 6 is fitted through a centering ring 8 in a lock ring groove 7 (see FIG. 5) formed in the inner peripheral surface of the socket 1. A rubber ring 9 is fitted in the formed rubber ring groove 10 (see FIG. 5).

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

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

The fixed position of the propulsive force transmission 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 receptacle 1 . The tip is positioned so as to abut on the end surface 1a of the socket 1 .

After fixing the propulsion force transmission device 11 to the insertion port 3 of the trailing pipe 5 on the ground, the trailing pipe 5 is suspended underground and fitted into the socket 1 of the leading pipe 2.例文帳に追加As a result, the leading pipe 2 and the trailing pipe 5 are joined while maintaining the contraction allowance T1 (see FIG. 5) at the pipe joint.

Next, when the trailing pipe 5 is pushed into the sheath pipe using a hydraulic jack or the like, the propulsive force transmission means 13 transmits the pushing force (pushing force) to the leading pipe 2, and the trailing pipe 5, the leading pipe 2, and their The tip tube is pushed into the back of the sheath tube.

As the number of tubes in the sheath tube increases, the pushing force increases. Here, in the case of the conventional propulsion transmission device, if the tightening force of the bolt 15 and the nut 16 is insufficient when the pushing force of the trailing pipe 5 increases, the propulsion force transmission device and the trailing pipe 5 will be There is a problem that the insertion port 3 of the trailing pipe 5 enters the socket 1 of the leading pipe 2 before the propulsion is completed due to slippage between the outer peripheral surface of the insertion port 3 and the insertion port 3 .

However, since the propulsive force transmission device 11 of the first embodiment has the claw portion 24 formed on the inner peripheral surface of the band 14 and the partition wall 23, the mounting posture of the band 14 is changed when the pushing force is applied. A fixed state is maintained without slippage between the band 14 and the outer peripheral surface of the insertion opening 3 only by obliquely changing with respect to the insertion opening 3.例文帳に追加The flow will be specifically described below with reference to the transition diagrams of FIGS. 5 and 6. FIG.

5, 6A, 6B, and 6C are cross-sectional views taken along the line α-α in FIG. FIG. 5 shows an initial state (“first stage”) in which no pushing force (load) is applied to the trailing pipe 5 .

When a pushing force is applied to the trailing pipe 5 from the first stage, a force acts on the band 14 in the direction opposite to the pushing force, and as shown in FIG. partition walls 23 are similarly deformed ("second stage").

From the second stage, a further pushing force is applied to the trailing pipe 5, and when it exceeds a predetermined force, as shown in FIGS. , to a state in which the mounting posture of the band 14 is obliquely changed (“third stage”). The reason why the partition wall 23 of the thrust transmission means 13A deforms more than the partition wall 23 of the thrust transmission means 13C is that the claw portions 24 are provided only in the first region (see FIG. The propulsion force transmission means 13A provided in the first region transmits a larger pushing force to the leading pipe 2 than the propulsion force transmission means 13C provided in the second region (see FIG. 4) (the propulsion force transmission means This is because the force applied to the partition wall 23 of 13A is larger). As described above, according to the propulsive force transmission device 11 according to the first embodiment, even when the pushing force is increased, the band 14 (the propulsive force transmission device) can be moved by simply changing the attachment posture of the band 14 obliquely. 11) and the outer peripheral surface of the insertion port 3, there is no slippage. As shown in FIGS. 6A and 6B, the end face of the band 14 (bracket 18) (end face on the rear side of the tube) and the end face of the propulsive force transmission member 17 correspond to the deformation of the partition wall 23. (The end face on the rear side of the tube) is in a state in which the two faces are displaced from the initial flat state (see FIG. 5) with no step between the two faces.

As described above, the propulsive force transmission device 11 according to the first embodiment sequentially pushes the pipes joined by fitting the insertion port 3 of the trailing pipe 5 into the socket 1 of the leading pipe 2 into the sheath pipe. , it is used in a push-laying construction method for laying a new pipe in the sheath pipe, and is fixed to the outer peripheral surface of the insertion port 3. Further, the propulsion force transmission device 11 includes a ring-shaped band 14 attached to the outer peripheral surface of the receptacle 3 , and the propulsion force transmission means 13 (an example of a “propulsion force transmission portion”) of the band 14 is attached to the end surface of the receptacle 1 . 1a to transmit the pushing force of the trailing pipe 5 to the leading pipe 2, and a claw portion 24 (an example of a "frictional force improving portion") and a partition wall 23 (an example of a "deforming portion") (the claw portion 24 and the partition wall 23 is an example of a “posture changing means”) changes the attachment posture of the band 14 when the pushing force exceeds a predetermined force.

Further, when the band 14 is divided into two regions by a straight line L passing through the center O in the cross section orthogonal to the axis, the The claw portion 24 makes the frictional force with the contact surface of the insertion port 3 higher than that of the other portions on the inner peripheral surface, and the partition wall 23 formed in the propulsion force transmission means 13 prevents the pushing force from exceeding a predetermined force. When the pressing force exceeds a predetermined force, the mounting posture of the band 14 is changed by deforming when pressed.

Therefore, according to the propulsive force transmission device 11 according to the first embodiment, when the pushing force into the trailing pipe 5 from the rear becomes large and exceeds a predetermined force, the mounting posture of the band 14 changes obliquely. Therefore, no slip occurs between the band 14 (thrust force transmission device 11) and the outer peripheral surface of the insertion port 3 of the trailing pipe 5 during the propulsion.

[Second embodiment]
Next, a second embodiment of the propulsion force transmission device for the jacking laying method of the present invention will be described with reference to the drawings. In addition, in description of 2nd Embodiment, description is abbreviate|omitted using the same code|symbol about the member similar to 1st Embodiment.

FIG. 7 is a perspective view showing a propulsion transmission device according to the second embodiment, and FIG. 8A shows a pipe joint portion to which the propulsion transmission device according to the second embodiment is mounted, in an initial state (first stage), FIG. 8(B) is a second stage cross-sectional view showing a pipe joint to which a propulsion transmission device according to the second embodiment is mounted, and FIG. 8(C) is a second embodiment. 3 is a cross-sectional view of the third stage showing a pipe joint mounted with a propulsion transmission device according to FIG.

As shown in FIG. 7, the thrust transmission device 11 according to the second embodiment has three thrust transmission means 13A, 13B, and 13C, which are provided in the second area (see FIG. 4). The longitudinal length of the thrust transmission member 17C in the thrust transmission means 13C is the longitudinal direction of the thrust transmission members 17A and 17B in the thrust transmission means 13A and 13B provided in the first region (see FIG. 4). is longer than the length of

The fixed position of the propulsive force transmission device 11 according to the second embodiment is a position at which the joint between the leading pipe 2 and the trailing pipe 5 can expand and contract when the insertion port 3 is fitted into the socket 1. The tip portion of the propulsive force transmission means 13C is positioned so as to abut on the end surface 1a of the socket 1. As shown in FIG.

In the propulsive force transmission device 11 according to the second embodiment, the claw portion 24 is formed on the inner peripheral surface of the band 14, and the longitudinal length of the propulsive force transmitting member 17C is equal to the propulsive force transmitting members 17A and 17B. Since it is longer than the length in the longitudinal direction, even if the band 14 is about to slip during propulsion, the attachment posture of the band 14 only changes diagonally with respect to the insertion opening 3, and the band 14 and the outer periphery of the insertion opening 3 No slippage occurs between the surfaces. The flow will be specifically described below with reference to the transition diagram of FIG.

8(A), (B), and (C) are α-α cross-sectional views (see FIG. 4) of the thrust transmission device 11 according to the second embodiment. FIG. 8A shows an initial state (“first stage”) in which no pushing force (load) is applied to the trailing tube 5 . In the first stage, the length of the thrust transmission member 17C is longer than the length of the thrust transmission member 17A. The propulsive force transmission member 17A does not contact the end face 1a of the socket 1 of the leading pipe 2, and a gap G is provided between them.

When the pushing force is applied to the trailing pipe 5 from the first stage, only the propulsive force transmission member 17C first contacts the end surface 1a of the leading pipe 2 and pushes the leading pipe 2 into the sheath pipe by the pushing force. When the pushing force is further applied to the trailing pipe 5, the propulsive force transmission member 17A is not in contact with the end surface 1a of the socket 1, so that the band 14 is attached in an oblique position as shown in FIG. 8(B). , and both the thrust transmission member 17C and the thrust transmission member 17A (17B) are brought into contact with the end surface 1a of the socket 1 of the leading pipe 2 ("second stage"). Then, the three propulsive force transmission members 17A, 17B, and 17C abut against the end surface 1a of the leading pipe 2 and push the leading pipe 2 into the sheath pipe by a pushing force.

When a further pushing force is applied to the trailing pipe 5 from the second stage, as shown in FIG. The band 14 is deformed and transitions to a state in which the attachment posture of the band 14 is further obliquely changed (“third stage”). The reason why the partition wall 23 of the thrust transmission means 13A deforms more than the partition wall 23 of the thrust transmission means 13C is that the claw portions 24 are provided only in the first region (see FIG. The propulsion force transmission means 13A provided in the first region transmits a larger pushing force to the leading pipe 2 than the propulsion force transmission means 13C provided in the second region (see FIG. 4) (the propulsion force transmission means This is because the force applied to the partition wall 23 of 13A is larger). As described above, according to the propulsive force transmission device 11 according to the second embodiment, even if the pushing force is increased, the band 14 (the propulsive force transmission device) can be changed only by obliquely changing the attachment posture of the band 14 . 11) does not slip during propulsion. Since the mounting posture of the band 14 has already changed obliquely in the second stage, if the pressing force is not so large, it is possible to proceed to the third stage without changing the posture.

As described above, the propulsive force transmission device 11 according to the second embodiment includes the ring-shaped band 14 attached to the outer peripheral surface of the insertion port 3, and the propulsive force transmission means 13 of the band 14 (“thrust force transmission section ') contacts the end surface 1a of the socket 1 to transmit the pushing force of the trailing pipe 5 to the leading pipe 2, and the claw portion 24 (an example of the ``frictional force improving portion'') and the propulsive force transmission member 17C (An example of a “first contact portion”) (The claw portion 24 and the propulsive force transmission member 17C are an example of a “posture changing means”) change the attachment posture of the band 14 when the pushing force exceeds a predetermined force. change.

Further, when the band 14 is divided into two regions by a straight line L passing through the center O in the cross section orthogonal to the axis, the The propulsion force transmission member 17C located in the second region (an example of the “other region”) has a higher frictional force with the contact surface of the insertion port 3 than other portions of the inner peripheral surface. By first contacting the end face 1a of the receptacle 1, the attaching posture of the band 14 is changed when the pushing force exceeds a predetermined force.

Therefore, according to the propulsive force transmission device 11 according to the second embodiment, when the force pushing the trailing pipe 5 from the rear increases and exceeds a predetermined force, the mounting posture of the band 14 changes obliquely. Therefore, no slip occurs between the band 14 and the outer peripheral surface of the insertion port 3 of the trailing pipe 5 .

[Third embodiment]
Next, a third embodiment of the propulsion force transmission device for the jacking laying method of the present invention will be described with reference to the drawings. In addition, in the description of the third embodiment, the same reference numerals are used for the same members as in the first embodiment, and the description thereof is omitted.

FIG. 9(A) is a perspective view showing a thrust transmission device according to the third embodiment, FIG. 9(B) is a sectional view of the thrust transmission device according to the third embodiment, and FIG. Fig. 10B is a cross-sectional view of the initial state (first stage) showing the pipe joint to which the propulsion transmission device according to the third embodiment is attached; FIG. 10(C) is a cross-sectional view of the second stage showing the pipe joint portion, and FIG.

As shown in FIG. 9A, the propulsive force transmission device 11 according to the third embodiment has a ring-shaped tightening means 12 mounted on the outer peripheral surface of the insertion port 3 of the trailing pipe 5 . A protrusion 31 is formed on one end surface of the band 14 . One end face of the band 14 contacts the end face 1 a of the socket 1 of the leading pipe 2 to transmit the pushing force of the trailing pipe 5 to the leading pipe 2 .

As shown in FIG. 9(B), when the band 14 is divided into two regions by a straight line L passing through the center O in the cross section perpendicular to the axis, one of the regions (below the straight line L in FIG. 9(B) area) will be referred to as the "first area", and the other area (the area above the straight line L in FIG. 9B) will be referred to as the "second area". The claw portion 24 is provided in the first region of the band 14 and the projection portion 31 is formed in the second region of the band 14 .

The fixed position of the propulsive force transmission device 11 according to the third embodiment is a position where the projection 31 of the band 14 comes into contact with the end face 1a of the socket 1 when the insertion slot 3 is fitted into the socket 1 .

In the propulsive force transmission device 11 according to the third embodiment, the band 14 has the claw portion 24 formed on the inner peripheral surface thereof, and the band 14 has the projection portion 31 formed thereon. However, the mounting posture of the band 14 changes obliquely with respect to the insertion opening 3, and no slippage occurs between the band 14 and the outer peripheral surface of the insertion opening 3. - 特許庁The flow will be specifically described below with reference to the transition diagram of FIG.

FIGS. 10A, 10B, and 10C are cross-sectional views taken along the line β-β (see FIG. 9B) of the thrust transmission device 11 according to the third embodiment. FIG. 10A shows an initial state (“first stage”) in which no pushing force (load) is applied to the trailing tube 5 . In the first stage, the projecting portion 31 of the band 14 protrudes from the end surface of the band 14, so the projecting portion 31 contacts the end surface 1a of the socket 1 of the leading pipe 2, whereas the end surface of the band 14 (projection portion 31) do not contact the end face 1a of the receiving port 1 of the leading pipe 2, and a gap G is provided between them.

When the pushing force is applied to the trailing pipe 5 from the first stage, first, only the projection 31 of the band 14 contacts the end surface 1a of the leading pipe 2, and the pushing force pushes the leading pipe 2 into the sheath pipe. When the pushing force is further applied to the trailing pipe 5, the end surface of the band 14 near the claw portion 24 is not in contact with the end surface 1a of the receptacle 1, so that the band 14 cannot be attached as shown in FIG. 10(B). The posture changes obliquely, and the gap G between the end face of the band 14 (excluding the protrusion 31) and the end face 1a of the receptacle 1 is narrowed ("second stage").

When the pushing force is further applied to the trailing pipe 5 from the second stage, both the protrusion 31 of the band 14 and the end face near the claw 24 are pushed into the leading pipe 2 as shown in FIG. 10(C). It transitions to a state of abutting on the end face 1a of the receptacle 1 (“third stage”). Then, the projection 31 of the band 14 and the end face of the band 14 push the leading pipe 2 into the sheath pipe by the pushing force. The mounting posture of the band 14 thus changes obliquely from the second stage because the protruding portion 31 side (the upper side in FIG. This is because the frictional force acting on the surface is low and slips. As described above, according to the propulsive force transmission device 11 according to the third embodiment, even if the pushing force is increased, the mounting posture of the band 14 is only obliquely changed. No slippage occurs between the force transmission device 11) and the outer peripheral surface of the insertion opening 3. In this third embodiment, as in the second embodiment, since the mounting attitude of the band 14 has already changed obliquely in the second stage, the attitude changes up to the third stage if the pressing force is not so excessive. It is possible to proceed without

As described above, the propulsive force transmission device 11 according to the third embodiment includes the ring-shaped band 14 attached to the outer peripheral surface of the insertion port 3, and the end surface of the band 14 (an example of the “propulsive force transmission portion”) abuts on the end face 1a of the socket 1 to transmit the pushing force of the trailing pipe 5 to the leading pipe 2, and the protrusions formed on the end face of the claw portion 24 (an example of the "frictional force improving portion") and the band 14 The portion 31 (an example of a “first contact portion”) (the claw portion 24 and the projection portion 31 are examples of a “posture changing means”) changes the mounting posture of the band 14 when the pressing force exceeds a predetermined force. change.

Further, when the band 14 is divided into two regions by a straight line L passing through the center O in the cross section orthogonal to the axis, the The claw portion 24 has a higher frictional force with the contact surface of the insertion port 3 than other portions on the inner peripheral surface, is located in the second region (an example of the “other region”), and extends in the axial direction of the band 14. The protruding protrusion 31 contacts the end face 1a of the receptacle 1 first, thereby changing the attaching posture of the band 14 when the pushing force exceeds a predetermined force.

Therefore, according to the propulsive force transmission device 11 according to the third embodiment, when the pushing force from the rear into the trailing pipe 5 increases and exceeds a predetermined force, the attachment posture of the band 14 changes obliquely. Therefore, no slip occurs between the band 14 and the outer peripheral surface of the insertion port 3 of the trailing pipe 5 .

[Fourth embodiment]
Next, a fourth embodiment of the propulsion force transmission device for the jacking laying method according to the present invention will be described with reference to the drawings. In addition, in the description of the fourth embodiment, the same reference numerals are used for the same members as in the first embodiment, and the description thereof is omitted.

11(A) is a partial cross-sectional perspective view showing a thrust transmission device according to the fourth embodiment, FIG. 11(B) is a cross-sectional view of the thrust transmission device according to the fourth embodiment, and FIG. 12(A). 12B is a cross-sectional view of the initial state (first stage) showing a pipe joint to which the thrust transmission device according to the fourth embodiment is attached; FIG. FIG. 12C is a cross-sectional view of the second stage showing the installed pipe joint, FIG. 12C is a third-stage cross-sectional view showing the pipe joint installed with the thrust transmission device according to the fourth embodiment.

As shown in FIG. 11(A), the propulsive force transmission device 11 according to the fourth embodiment has a ring-shaped tightening means 12 mounted on the outer peripheral surface of the insertion port 3 of the trailing pipe 5 . The band 14 includes a ring-shaped band main body 14a mounted on the outer peripheral surface of the insertion opening 3, and a supporting wall 14b rising in the outer peripheral direction is formed on one edge of the band main body 14a. A propulsive force transmission member 32 is provided in a ring shape on the outer peripheral surface of the band main body 14a. The thrust transmission member 32 is provided so as to protrude from the other edge of the band main body 14a while contacting the support wall 14b.

The propulsive force transmission member 32 abuts on the end surface 1 a of the socket 1 of the leading pipe 2 to transmit the pushing force of the trailing pipe 5 to the leading pipe 2 . The propulsive force transmission member 32 does not deform (is not crushed) when the pushing force does not exceed a predetermined force, transmits the pushing force of the trailing pipe 5 to the leading pipe 2, and the pushing force exceeds the predetermined force. It consists of a material that deforms (squashes) when exceeded.

As shown in FIG. 11(B), when the band 14 is divided into two regions by a straight line L passing through the center O in the cross section orthogonal to the axis, one of the regions (below the straight line L in FIG. 11(B) area) will be referred to as the "first area", and the other area (the area above the straight line L in FIG. 11B) will be referred to as the "second area". The claw portion 24 is provided in a first region of the band 14, and the thrust transmission member 32 is provided over the first and second regions.

In the propulsive force transmission device 11 according to the fourth embodiment, the pawl portion 24 is formed on the inner peripheral surface of the band 14, and the propulsive force transmission member 32 is deformed when the pushing force exceeds a predetermined force. Therefore, the band 14 is only attached in an oblique manner with respect to the insertion opening 3, and no slip occurs between the band 14 and the outer peripheral surface of the insertion opening 3. - 特許庁The flow will be specifically described below with reference to the transition diagram of FIG. 12 .

12(A), (B), and (C) are γ-γ cross-sectional views (see FIG. 11(B)) of the propulsive force transmission device 11 according to the fourth embodiment. FIG. 12(A) shows an initial state (“first stage”) in which no pushing force (load) is applied to the trailing tube 5 . In the first stage, the propulsive force transmission member 32 contacts the end surface 1a of the socket 1 of the leading pipe 2 .

When the pushing force is applied to the trailing pipe 5 from the first stage, the pushing force of the trailing pipe 5 pushes the leading pipe 2 into the sheath pipe. Then, when the pushing force of the trailing pipe 5 exceeds the first predetermined force, as shown in FIG. A transition is made to a state in which the portion is uniformly deformed (“second stage”).

From the second stage, a further pushing force is applied to the trailing pipe 5, and when the second predetermined force is exceeded, the portion corresponding to the first region of the propulsive force transmission member 32 is shown in FIG. 10(C). However, the portion corresponding to the second region is deformed more greatly than the portion corresponding to the second region, and the mounting attitude of the band 14 changes to a state in which it is obliquely changed (“third stage”). The reason why the portion corresponding to the first region deforms more than the portion corresponding to the second region is that the claw portion 24 is provided only in the first region, so that the portion corresponding to the first region is more deformed than the portion corresponding to the second region. This is because a larger pushing force is transmitted to the leading pipe 2 than the portion corresponding to the second region (the force applied to the portion corresponding to the first region is greater). As described above, according to the propulsive force transmission device 11 according to the fourth embodiment, even when the pushing force is increased, the band 14 (the propulsive force transmission device) can be changed only by obliquely changing the attachment posture of the band 14 . 11) and the outer peripheral surface of the insertion port 3, there is no slippage.

As described above, the propulsive force transmission device 11 according to the fourth embodiment includes the ring-shaped band 14 attached to the outer peripheral surface of the insertion port 3, and the propulsive force transmission member 32 (an example of the “thrust force transmission portion”). ) contacts the end face 1a of the socket 1, transmits the pushing force of the trailing pipe 5 to the leading pipe 2, and provides a claw portion 24 (an example of a “friction force improving portion”) and a propulsive force transmission member 32 (claw portion 24 and the propulsive force transmission member 32 are an example of a "position changing means") change the mounting position of the band 14 when the pushing force exceeds a second predetermined force.

Further, when the band 14 is divided into two regions by a straight line L passing through the center O in the cross section orthogonal to the axis, the The claw portion 24 has a higher frictional force with the contact surface of the insertion port 3 than other portions on the inner peripheral surface, and the portion corresponding to the first region of the propulsive force transmission member 32 has a second predetermined pushing force. When the force exceeds the second region, the portion corresponding to the second region is deformed to a greater extent, thereby changing the attaching posture of the band 14 when the pushing force exceeds the second predetermined force.

Therefore, according to the propulsive force transmission device 11 according to the fourth embodiment, when the pushing force from the rear into the trailing pipe 5 increases and exceeds the second predetermined force, the mounting posture of the band 14 is oblique. , there is no slippage between the band 14 and the outer peripheral surface of the insertion port 3 of the trailing tube 5 during propulsion.

In the above embodiment, the claw portion 24 is formed on the inner peripheral surface of the band 14 near the portion where the band 14 is tightened by the bolt 15 and nut 16 (see FIGS. 3 and 4). It may be formed at other positions in the first region, and the number thereof may be plural. Further, instead of the claw portion 24, a friction force increasing portion made of a material or having a shape that increases the friction force with the contact surface of the insertion port 3 more than other portions on the inner peripheral surface of the band 14 is arranged in the first region. You can do it. In addition, when an excessive force exceeding the pushing force during propulsion is applied due to an earthquake or the like after the propulsion is completed, part of the propulsion force transmission member may be deformed or damaged, the band may slip, etc. Allows forcing of mouth 3.

According to the propulsive force transmission device 11 according to each of the above embodiments, the band 14, which is fastened and fixed to the outer peripheral surface of the trailing pipe 5 by the bolt 15 and the nut 16, is tilted from the initial posture, whereby the circumference of the band 14 is increased. An additional tensile force will be generated in the direction. As a result, the tensile force improves the fixing force of the band 14 to the trailing tube 5, thereby making it less slippery than in the initial posture.

Further, by tightening the bolt 15 and the nut 16 until the claw portion 24 bites into the trailing pipe 5 (until the band 14 is in close contact), a fitting relationship of unevenness in a partial shape is constructed. A situation in which the band 14 takes an oblique posture can be easily created. As a result, variations in tightening strength between the bolt 15 and the nut 16 due to the operator can be absorbed.

1: Receptacle 1a: End face 2: Leading pipe 3: Insertion port 4: Retaining projection 5: Trailing pipe 6: Lock ring 7: Groove for lock ring
8: Centering Ring 9: Rubber Ring 10: Rubber Ring Groove 11: Thrust Transmission Device of the Present Invention 12: Tightening Means 13: Thrust Transmission Means 14: Band 15: Bolt 16: Nut 17: Thrust Transmission Member 17a: long hole 18: bracket 20: wheel 21: fixed shaft 22: nut 23: partition wall 24: claw 31: protrusion 32: propulsive force transmission member

Claims (9)

It is used in a jacking laying method in which the pipes joined by fitting the spigot of the trailing pipe into the socket of the leading pipe are sequentially pushed into the sheath pipe to lay a new pipe in the sheath pipe, and the outer circumference of the spigot A propulsion transmission device for a propulsion laying method fixed to a surface, comprising:
Including a ring-shaped band attached to the outer peripheral surface of the insertion port,
The band is
a propulsive force transmitting portion that abuts on the end face of the socket and transmits the pushing force of the trailing pipe to the leading pipe;
posture changing means for changing the mounting posture of the band when the pushing force exceeds a predetermined force;
has
The posture changing means is
When the band is divided into two regions by a straight line passing through the center in the cross section perpendicular to the axis, the above-mentioned is formed on at least a part of the inner peripheral surface of one of the regions, and the a frictional force improving portion that increases the frictional force with the contact surface of the insertion port;
a deformation portion formed in the propulsion force transmission portion and deformed when the pushing force exceeds the predetermined force;
A propulsion force transmission device for a jacking laying method, characterized by comprising : It is used in a jacking laying method in which the pipes joined by fitting the spigot of the trailing pipe into the socket of the leading pipe are sequentially pushed into the sheath pipe to lay a new pipe in the sheath pipe, and the outer circumference of the spigot A propulsion transmission device for a propulsion laying method fixed to a surface, comprising:
Including a ring-shaped band attached to the outer peripheral surface of the insertion port,
The band is
a propulsive force transmitting portion that abuts on the end face of the socket and transmits the pushing force of the trailing pipe to the leading pipe;
posture changing means for changing the mounting posture of the band when the pushing force exceeds a predetermined force;
has
The posture changing means is
When the band is divided into two regions by a straight line passing through the center in the cross section perpendicular to the axis, the above-mentioned is formed on at least a part of the inner peripheral surface of one of the regions, and the It has a frictional force improving part that increases the frictional force with the contact surface of the insertion port,
A propulsion force transmission device for a jacking laying method, wherein the propulsion force transmission portion positioned in the other of the two regions has a first contact portion that first contacts the end face of the socket. 3. The propulsion force transmission device according to claim 2 , wherein the first abutment portion axially protrudes from the end surface of the band. 3. The propulsion force transmission device according to claim 2 , wherein the first contact portion axially protrudes from the outer peripheral surface of the band. The propulsive force transmission unit is
Composed of a plurality of propulsion force transmission means arranged at intervals along the outer peripheral surface of the insertion port,
The propulsive force transmission means is
a propulsive force transmission member that abuts on the end face of the socket and transmits the pushing force of the trailing pipe to the leading pipe;
a bracket secured to the band;
a support member that supports the trailing pipe within the sheath pipe;
a fixed shaft, one end of which is attached to the bracket, for fixing the support member to the bracket;
has
An elongated hole extending in the axial direction of the band is formed in the propulsive force transmission member,
The elongated hole has a partition wall for fixing the fixed shaft to one end thereof and partitioning the elongated hole,
the other end of the fixed shaft is inserted into one end of the elongated hole so as not to come out,
2. The propulsion force transmission device for jacking construction method according to claim 1 , wherein the partition wall functions as the deformation portion. The propulsive force transmission unit is
Composed of a plurality of propulsion force transmission means arranged at intervals along the outer peripheral surface of the insertion port,
The propulsive force transmission means is
a propulsive force transmission member that abuts on the end face of the socket and transmits the pushing force of the trailing pipe to the leading pipe;
a bracket secured to the band;
a support member that supports the trailing pipe within the sheath pipe;
a fixed shaft, one end of which is attached to the bracket, for fixing the support member to the bracket;
has
An elongated hole extending in the axial direction of the band is formed in the propulsive force transmission member,
The elongated hole has a partition wall for fixing the fixed shaft to one end thereof and partitioning the elongated hole,
the other end of the fixed shaft is inserted into one end of the elongated hole so as not to come out,
5. The jacking construction method according to claim 4 , wherein, among the plurality of thrust force transmission means, the thrust force transmission means located in the other of the two regions has the first contact portion. propulsion transmission device. 7. A propulsion force transmission device for a jacking construction method according to claim 5 or 6 , wherein said supporting member comprises a wheel. 8. The thrust transmission device for a construction method according to any one of claims 5 to 7 , wherein a tip portion of the thrust transmission member is bent so as to come into contact with the end surface of the socket. . 9. The propulsion force transmission device for a construction method according to claim 1 , wherein a protrusion is formed on said frictional force enhancing portion.

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