JP2002213667A - Propulsion pipe having earthquake-resistant function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To place a pipe having an earthquake-resistant joint portion between a socket and a spigot by using a propulsion technique in laying a pipeline. SOLUTION: A circular protruded portion 19 is provided on the outer periphery of the spigot 4 which does not enter the socket. The circular protruded portion 19 is formed by passing a ring body 15, having one peripheral split portion 16 with a rectangular cross sectional surface through the outer periphery of a spigot protruded portion 12, provided on the outer periphery at the end of the spigot 4, in a state of being increased in diameter and externally fitting and fixing it to the outer periphery of the spigot 4. The ring body 15 has a lightening portion 17 for facilitating diameter increase of the ring body 15. A protrusion 18 is formed on the outer periphery of the circular protruded portion 19. A propulsive force transmitting member 21, longer than the circular protruded portion 19 extending in the axial direction, is provided along the outer periphery of the circular protruded portion 19, so as to be latched to the protrusion 18. Thus, an end face 27 of the socket 2 can be thrusted by the propulsive force transmitting member 21, so that the propulsive force can be transmitted between the socket 2 and the spigot 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a propulsion pipe having an earthquake-resistant function.

[0002]

2. Description of the Related Art There is known a propulsion method in which a pipe is laid by propelling a pipe underground. The propulsion pipes used in this propulsion method have insertion ports formed at the ends of the other pipes inserted into the reception ports formed at the ends of one of the pipes to be joined to each other. Propulsion force is transmitted to and from the insertion opening. This thrust is transmitted with the insert fully inserted into the receptacle,
Therefore, when the installation of the pipeline is completed, the insertion port cannot enter the inside of the receiving port any more.

On the other hand, there is known an earthquake-resistant tube provided with a separation preventing function and a telescopic function between a receiving port and an insertion port. In this seismic pipe, when an earthquake occurs after the pipeline is laid, the expansion and contraction to allow the insertion port to slip out of or into the reception port within a certain range due to the seismic force, It is formed at the joint between the opening and the opening. In other words, in the case of seismic pipes,
The spout must not be completely inserted into the spout.

[0004] For this reason, in an earthquake-resistant pipe, it is not possible to lay a pipeline in the ground by a propulsion method, and it is general to bury the pipe using an open-cutting method.

[0005]

However, when a pipeline is to be laid under a river or a track, it is difficult to adopt a conventional open-cutting method. In the case where a pipe is buried under a road, the use of the open-cutting method has a problem that traffic is obstructed, such as the need to restrict traffic.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve such a problem and to make it possible to lay a pipe having a seismic resistance function by a propulsion method at a joint between a receiving port and an insertion port.

[0007]

In order to solve the above-mentioned problems, the invention according to claim 1 is provided in the inside of a socket formed at one end of one pipe to be joined to the other, at the end of the other pipe. The formed insertion port is inserted, an insertion projection is formed on the outer periphery of the tip of the insertion port, and the detachment prevention function using the insertion projection between the receiving port and the insertion port and the expansion and contraction are performed. In the propulsion pipe having a seismic function provided with a function, an annular projection is provided on the outer periphery of the insertion port that does not enter the receptacle, and the annular projection has a rectangular cross section and a circumferential direction. The ring body having one divided portion is formed by being passed through the outer circumference of the insertion projection in an expanded state and being fitted to the outer circumference of the insertion hole and fixed, and The ring body is provided with a stolen portion for facilitating the diameter expansion of the ring body. A protrusion is formed on the portion, and a propulsion force transmitting member longer than the axial length of the annular protrusion is provided so as to be able to engage with the protrusion along the outer periphery of the annular protrusion. So that the end face of the receptacle can be pressed, so that thrust can be transmitted between the insertion port and the receptacle through the annular projection and the thrust transmission member. It is composed.

According to such a configuration, since the annular protrusion is formed fixed to the outer periphery of the insertion opening, the annular protrusion can receive a propulsive force acting from the insertion opening. That is, the thrust acting on the propulsion pipe having the seismic function is transmitted from the insertion port to the annular projection fixed to the outer periphery of the insertion port, and the thrust transmission member is transmitted from the projection formed on the annular projection. Is transmitted to the receiving port. Therefore, since the receiving port receives the propulsive force acting on the insertion port through the annular projection and the propulsion force transmitting member, the driving force can be transmitted without the insertion port completely entering the receiving port. A pipe with a joint part provided with an earthquake-resistant function can be laid by a propulsion method.

Further, when a ring-expanding force is applied to the ring body by an appropriate method, the ring body is provided with a meat stealing portion for facilitating the expansion of the ring body. The resistance to the radial force is reduced, and the ring body can be easily expanded even with a small expanding force. Thereby, while expanding the diameter of the ring body within the range of elastic deformation, it is possible to easily fit the ring body to the outer circumference of the insertion port by passing the ring element through the outer circumference of the insertion projection.

According to a second aspect of the present invention, an insertion opening formed at an end of the other pipe is inserted into a receiving opening formed at an end of one of the pipes joined to each other. In the propulsion pipe having an earthquake-proof function in which an insertion projection is formed on the outer periphery of the tip, and a detachment prevention function and an expansion and contraction function using the insertion projection are provided between the receiving port and the insertion port. An annular protrusion is provided on the outer periphery of the insertion opening that does not enter the receiving opening, and the annular projecting portion has a rectangular cross section and a plurality of divided pieces circumferentially divided into the receiving opening. The annular projection is formed so as to be annularly fixed to the outer periphery of the insertion opening, the projection is formed on the annular projection, and the propulsion force transmitting member longer than the axial length of the annular projection is provided on the annular projection. The protruding portion is provided along the outer periphery of the portion so as to be able to engage with the protrusion. So that the end face of the socket can be pressed so that thrust can be transmitted between the insertion port and the socket via the annular projection and the thrust transmitting member. It is composed.

According to such a configuration, the annular projection is formed by fixing the plurality of divided pieces in an annular shape on the outer periphery of the insertion opening, so that the protruding force acting from the insertion opening is formed by the annular projection. Can be received. In other words, the thrust acting on the propulsion pipe having the seismic function is transmitted from the insertion port to the annular projection fixed to the outer periphery of the insertion port, and the thrust transmission member is transmitted from the projection formed on the annular projection. After that, it is transmitted to the receiving port. Therefore, by receiving the thrust acting on the insertion port via the annular projection and the thrust transmission member,
Since the propulsion force can be transmitted in a state where the insertion port does not completely enter the receiving port, it is possible to lay a pipe provided with a seismic function at the joint portion by the propulsion method.

Further, the annular projection is formed by being annularly fixed to the outer periphery of the insertion opening which does not enter the receiving opening, with the divided piece having a rectangular cross section and divided into a plurality in the circumferential direction. An annular projection can be easily formed on the outer periphery of the insertion port having the insertion projection formed on the outer periphery.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, a socket 2 is formed at one end of a cast iron pipe 1 joined to each other, and a socket 2 is formed at an end of the other cast iron pipe 3. An insertion hole 4 to be inserted into the inside is formed. A cement mortar lining layer 5 is formed on the inner periphery of the tubes 1 and 3.

An annular rubber sealing member 7 is disposed in the sealing member housing groove 6 on the inner periphery of the receiving port 2. A lock ring receiving groove 8 is formed on the inner periphery of the receiving port 2 on the back side of the sealing material receiving groove 6, and a metal lock ring 9 is attached to the receiving groove 8 in the circumferential direction. . Lock ring 9
A rubber ring 10 for holding the lock ring 9 in a state of being centered with respect to the receiving port 2 at the time of joining the joint is arranged between the outer periphery of the housing groove 8 and the inner periphery of the accommodation groove 8. Reference numeral 11 denotes a rear end face of the receiving port 2 and a lock ring 9 accommodated in the accommodation groove 8.
Is formed at a position at a predetermined distance from.

On the outer periphery of the distal end of the insertion port 4, an insertion projection 12 is formed which can engage with the lock ring 9 from the back side of the receiving port 2. A taper on the outer periphery of the distal end of the insertion port 4 including the insertion projection 12 serves as a guide when the insertion port 4 is inserted into the receiving port 2 in which the sealing material 7 and the lock ring 9 are accommodated. Surface 13 is formed.

The insertion projection 12 is formed such that its dimension in the tube axis direction is smaller than the distance from the lock ring 9 to the rear end face 11 described above. Therefore, the insertion port 4 is relatively movable in the tube axis direction with respect to the receiving port 2 within a range until the insertion projection 12 hits the lock ring 9 or the rear end surface 11.

As shown in FIG. 1, FIG. 3 and FIG.
An annular protrusion 19 having a rectangular cross section is provided on the outer periphery of the insertion opening 4 at the portion outside the opening, that is, the portion not entering the receiving opening 2. A projection 18 having a rectangular cross section is provided integrally with the annular projection 19 on the outer periphery of the annular projection 19. As shown in FIG. 1 and FIG.
A cylindrical metal thrust transmitting member 21 longer than the length of the annular projection 19 in the tube axis direction is provided between the port 8 and the receiving port 2.

As shown in FIG. 4, the propulsion force transmitting member 21 is divided into two parts in the circumferential direction, and reference numeral 22 denotes a divided part thereof. In the divided portion 22, a radially projecting portion 23 is formed at an end portion of the thrust transmitting member 21, and these protruding portions 23 are fastened to each other by a fastening element 24 such as a bolt and a nut. Are assembled in a tubular shape.

As shown in FIGS. 1 and 4, when the thrust transmitting member 21 is assembled in a cylindrical shape, the thrust transmitting member 21 extends in the pipe axial direction at a portion of the annular projection 19 except for the projection 18. It is slidably fitted and fixed by the fastening element 24 so that the end face 25 of the thrust transmitting member 21 remote from the receiving port 2 can engage with the projection 18 from the receiving port 2 side. is set up. Further, the end face 26 of the thrust transmitting member 21 on the receiving port 2 side is configured to be able to contact the end face 27 of the receiving port 2.

The annular projection 19, its projection 18, and the thrust transmitting member 21 are configured as described above on the outer periphery of the insertion opening 4, so that one end surface 26 of the thrust transmitting member 21 becomes the end surface of the receptacle 2. 27 and the thrust transmitting member 2
Since the other end surface 25 of 1 engages with the projection 18 of the annular projection 19 from the receiving port 2 side, the transmission of the propulsive force between the receiving port openings is performed via the propulsive force transmitting member 21.
That is, in laying the conduit, the insertion port 4 is inserted into the reception port 2, and the insertion port 4 is not in contact with the rear end surface 11 of the reception port 2. Propulsion can be transmitted between them.

As shown in FIG. 1, exterior concrete 28 is cast on the outer circumference of the pipes 1 and 3 except for the portion where the annular projection 19 is formed and the thrust transmitting member 21 is provided. The exterior concrete 28 is cast for the purpose of reducing the propulsion resistance when laying a pipeline, and is formed so that its outer diameter corresponds to the maximum outer diameter of the receiving port 2.

The annular projection 19 as shown in FIGS. 1, 3 and 4 is fitted with a metal ring 15 as shown in FIG. It is formed by being done.

As shown in FIG. 2, the ring body 15 is an annular body, and has one divided portion 16 in the circumferential direction. 17 are provided.

The ring body 15 is passed through the outer periphery of the insertion projection 12 while being expanded in diameter by an appropriate method using a hand, a tool, or the like, and is fitted into the groove 14 on the outer periphery of the insertion opening 4. At this time, since the ring body 15 is provided with the meat stealing portion 17, when a diameter expanding force is applied to the ring body 15, a moment acting on the ring body 15 by the expanding force is centered around the meat stealing portion 17. Act. Therefore, the diameter of the ring body 15 can be easily expanded even with a small expanding force. Thus, the ring body 15 is expanded around the meat stealing portion 17 within the range of elastic deformation while the insertion protrusion 12
And is fitted into the groove 14 on the outer periphery of the insertion opening 4.

The ring body 15 is fitted into the groove 14 on the outer periphery of the insertion opening 4, and the divided portion 16 provided only at one location in the circumferential direction of the ring body 15 is subjected to welding as shown in FIG. Accordingly, an annular projection 19 in which the ring body 15 is fixed to the insertion opening 4 is formed. At this time, the dividing unit 1
6 is welded so that the weld bead 20 does not reach the projection 18.

In such a configuration, when joining the tubes 1 and 3, first, the rubber ring 1 is inserted into the receiving port 2 of the tube 1.
0, the lock ring 9 and the sealing material 7 are attached, and the insertion port 4 is inserted into the receiving port 2. Then, the insertion projection 12 at the tip of the insertion port 4 is moved by the action of the taper surface 13 to form the sealing material 7.
, The lock ring 9 and the rubber ring 10 are spread out, pass through the position between the seal member 7 and the lock ring 9, and are located at a portion between the lock ring 9 and the rear end surface 11.

On the other hand, the ring 1
A propulsion transmitting member 21 is fitted on the outer periphery of the annular projection 19 formed by fitting the propulsion 5 into a state in which the end face 25 of the propulsion transmitting member 21 is engaged with the projection 18 by the fastening element 24. To be fixed to the annular projection 19.

When laying the pipe, the pipe 1, in this state,
3. Make each other propelled underground. In this case, for example, when transmitting the propulsive force from the insertion port 4 to the receiving port 2, the portion of the annular projection 19 that enters the groove 14 can receive the propulsion force acting from the insertion port 4. Therefore, the propulsive force acting in the tube axis direction of the insertion opening 4 and trying to press the receiving opening 2 is transmitted from the groove 14 provided in the insertion opening 4 to the annular projection 19, and the annular projection 19 Is transmitted to the propulsion force transmission member 21 from the projection 18 provided on the boss. further,
The end face 26 of the thrust transmitting member 21 is the end face 27 of the receptacle 2.
Is pressed, the propulsive force is transmitted from the insertion opening 4 to the receiving opening 2. That is, the pipe 1 is propelled in the pipe axis direction of the pipe 3 in the state shown in FIG. 1, and the pipe line is laid in the state shown in FIG.

The behavior when a force in the pipe axis direction acts on the joint between the receiving port and the insertion port at the time of occurrence of an earthquake or the like is as follows. As shown in FIG. 5, when a force is applied to the joint portion 29 between the receiving port 2 and the receiving port 4 in a direction in which the receiving port 4 comes out of the receiving port 2, the movement of the pipes 1 and 3 is changed to the annular protrusion. The annular projection 19 and the thrust transmission member 21 fitted and fixed to the annular projection 19 are not restricted by the propulsion transmission member 19 and the propulsion transmission member 21, but are integrally moved away from the receiving port 2. Eventually, the insertion projection 12 of the insertion port 4 engages with the lock ring 9 from the back side of the receiving port 2, so that the insertion of the insertion port 4 from the receiving port 2 is reliably prevented.

When a force acts in a direction in which the insertion port 4 enters the reception port 2 and the force is not so large, this force is applied to the reception port 2 and the insertion port 4 in the same manner as in the case of the above-described thrust. And there is no stretching between them.

On the other hand, as shown in FIG. 6, when a large force acts on the joint 29 between the socket 2 and the socket 4 in the direction in which the socket 4 enters the socket 2, The projection 18 of the annular projection 19 is broken by the shearing force acting between the propulsion force transmission member 21 and the projection 18. Then, the restraint by the projection 18 and the propulsion force transmitting member 21 is released,
As a result, the annular projection 19 can move the inner peripheral portion of the propulsion force transmitting member 21 in the pipe axis direction of the pipe 1, and
Until it hits the rear end face 11.

In this manner, the function of expanding and contracting the joint portion 29 and the function of preventing detachment of the joint portion 29 at the time of occurrence of an earthquake are secured, and the performance as an earthquake-resistant joint is obtained. Note that the projection 18 may be formed on the inner periphery of the propulsion force transmitting member 21 instead of or together with the outer periphery of the annular projection 19 as described above. The projections 18 may be continuous in the circumferential direction or may be divided in the circumferential direction.

As described above, since the annular projection 19 is fixedly formed on the outer periphery of the insertion opening 4, the annular projection 19 can receive the propulsive force acting from the insertion opening 4. That is, the propulsive force acting on the pipe having the seismic function is transmitted from the insertion port 4 to the annular projection 19 fixed to the outer periphery of the insertion port 4, and the propulsion force is transmitted from the projection 18 formed on the annular projection 19. The light is transmitted to the receiving port 2 via the transmission member 21. Therefore, the receiving port 2 receives the propulsive force acting on the insertion port 4 via the annular projection 19 and the propulsion force transmitting member 21, and transmits the propulsive force without the insertion port 4 completely entering the receiving port 2. Therefore, a pipe in a state where the joint part 29 is provided with an earthquake-resistant function can be laid by the propulsion method.

When the ring body 15 is passed through the outer periphery of the insertion projection 12 in order to fit the ring body 15 into the groove 14 on the outer periphery of the insertion opening 4, when a diameter expanding force is applied to the ring body 15, Since the moment acting on the ring body 15 is concentrated on the thinned portion 17, the diameter of the ring body 15 can be easily expanded even with a small expanding force. Thereby, while expanding the diameter of the ring body 15 within the range of elastic deformation,
The ring body 15 can be passed through the outer circumference of the insertion projection 12 and easily fitted into the groove 14 on the outer circumference of the insertion port 4.

As an embodiment of the present invention, in addition to the one shown in FIG. 1, as shown in FIG. The ring body 15 is directly fitted into the sleeve 4 and the opening 4 and the ring body 15 are welded along the circumferential direction to thereby form the opening 4 and the ring body 15.
Are integrally fixed, thereby forming an annular projection 19.

Also in this case, the ring body 15 is passed through the outer periphery of the insertion projection 12 in a state where the diameter is enlarged, and is fitted to the outer periphery of the insertion port 4 which does not enter the receiving port 2 and welded. You. Further, instead of the ring body 15 having the meat stealing portion 17 on the substantially opposite side of the dividing portion 16 as shown in FIG.
As shown in FIG.
It is also possible to use the ring body 30 provided with a pipe for a pipe having an earthquake-resistant function as shown in FIGS.

As shown in FIG. 8, a metal ring 30
Has one dividing portion 16 in the circumferential direction. As shown in FIG. 8 and FIG. 9, a meat steal portion 31 is provided in the inner peripheral portion of the ring body 30 so as to cut through the inside of the ring body 30 from the radial inside of the ring body 30 over the circumferential direction. Have been. However, at both ends of the ring body 30 along the circumferential direction, which constitutes the dividing part 16, the meat stealing parts 31 are provided.
Are not formed, and edges 32, 32 are provided instead.

While expanding the diameter of the ring body 30, the ring body 30 is passed through the outer circumference of the insertion projection 12 and fitted into the groove 14 of the insertion hole 4, and as shown in FIG.
As shown in FIGS. 10 and 11, the annular projection 19 in a state in which the ring body 30 is fixed to the insertion opening 4 by welding the divided portion 16 between the second edge 32 and the other edge 32. Is formed.

While expanding the diameter of the ring body 30 and passing the outer circumference of the insertion projection 12 into the groove 14 in the insertion hole 4 as shown in FIGS.
0, the meat stealing part 31 is cut out along the circumferential direction.
Is provided, the resistance to the expanding force is reduced in the stealing portion 31, and the ring body 30 can be easily expanded even with a small expanding force. Thereby, while expanding the diameter of the ring body 30 within the range of elastic deformation,
It is possible to pass through the outer periphery of the insertion projection 12 and easily fit into the groove 14 of the insertion opening 4.

Instead of fitting the ring body 30 into the groove 14, the ring body 30 is inserted into the slot 4 as in the case shown in FIG.
May be directly fitted on the outer periphery of the base and fixed by welding along the circumferential direction.

Further, in addition to the ring body 15 shown in FIG. 2 and the ring body 30 shown in FIG. 8, it is also possible to use two arc-shaped divided pieces 33 as shown in FIG. As shown in FIG. 12, each of the divided pieces 33 is configured to be annularly arranged by combining the divided pieces 33. Such divided pieces 33, 3
By using 3, the divided piece 33 can be directly fitted into the groove 14 in the insertion port 4 without going over the outer periphery of the insertion projection 12.

Each of the two divided pieces 33 is fitted into the groove 14 in the insertion opening 4 so that the ends of the two divided pieces 33 do not touch each other, and a gap 34 between one divided piece 33 and the other divided piece 33 is formed. Are welded to each other, as shown in FIG. 13, the two divided pieces 33 are continuous in the circumferential direction, and the insertion opening 4 and the two divided pieces 33 are integrally fixed to each other to form the annular projection 19. Is formed.

As described above, the two divided pieces 33 can be directly and easily fitted into the groove 14 on the outer periphery of the insertion port 4 without going over the insertion projection 12. Therefore, the annular projection 19 in which the divided piece 33 is fixed to the outer periphery of the insertion opening 4 in an annular manner can be easily formed.

It is to be noted that, instead of fitting the split piece 33 into the groove 14, as in the case shown in FIG. 7, this is directly fitted to the outer periphery of the insertion hole 4 and fixed by welding along the circumferential direction. May be.

[0045]

As described above, according to the present invention, since the annular projection is formed fixed to the outer periphery of the insertion opening, the annular projection can receive the propulsive force acting from the insertion opening. That is, the thrust acting on the propulsion pipe having the seismic function is transmitted from the insertion port to the annular projection fixed to the outer periphery of the insertion port, and the thrust transmission member is transmitted from the projection formed on the annular projection. Is transmitted to the receiving port. Therefore, since the receiving port receives the propulsive force acting on the insertion port through the annular projection and the propulsion force transmitting member, the driving force can be transmitted without the insertion port completely entering the receiving port. A pipe with a joint part provided with an earthquake-resistant function can be laid by a propulsion method. In addition, when a ring expanding force is applied to the ring body by an appropriate method, the ring body is provided with a meat stealing part for easily expanding the ring body. The resistance is reduced, and the ring body can be easily expanded even with a small expanding force. Thereby, while expanding the diameter of the ring body within the range of elastic deformation, it is possible to easily fit the ring body to the outer circumference of the insertion port by passing the ring element through the outer circumference of the insertion projection.

Further, since the plurality of divided pieces are annularly fixed on the outer periphery of the insertion opening to form an annular projection, the annular projection can receive a propulsive force acting from the insertion opening. In other words, the thrust acting on the propulsion pipe having the seismic function is transmitted from the insertion port to the annular projection fixed to the outer periphery of the insertion port, and the thrust transmission member is transmitted from the projection formed on the annular projection. After that, it is transmitted to the receiving port. Therefore, since the receiving port receives the propulsive force acting on the insertion port through the annular projection and the propulsion force transmitting member, the driving force can be transmitted without the insertion port completely entering the receiving port. A pipe with a joint part provided with an earthquake-resistant function can be laid by a propulsion method. Furthermore, the annular projection is formed by being fixed in an annular shape on the outer periphery of the insertion opening into which the divided piece having a rectangular cross section and being divided into a plurality in the circumferential direction does not enter the receiving opening, so that the annular projection can be inserted. It can be easily formed on the outer periphery of the mouth.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a propulsion pipe having an earthquake-resistant function according to an embodiment of the present invention.

FIG. 2 is a view showing a ring body forming an annular protrusion in FIG. 1;

FIG. 3 is a cross-sectional view showing a state in which an annular projection is formed on the outer periphery of an insertion opening using the ring body of FIG. 2;

FIG. 4 is a cross-sectional view showing a state in which a propulsion force transmitting member is attached to the outer periphery of the annular protrusion shown in FIG.

5 is a partial cross-sectional view showing a state in which a force due to an earthquake is acting in a direction in which an insertion hole comes out of a reception port in a joint portion of the propulsion pipe having an earthquake-resistant function in FIG.

FIG. 6 is a partial cross-sectional view showing a state in which a force due to an earthquake is acting in a direction in which the insertion port enters the reception port in the joint portion of the propulsion pipe having an earthquake-resistant function in FIG.

FIG. 7 is a sectional view showing a propulsion pipe having an earthquake-resistant function according to another embodiment of the present invention shown in FIG. 1;

FIG. 8 is a view showing a ring body different from that shown in FIG. 2;

9 is an enlarged cross-sectional view illustrating a shape of a cross section of the ring body illustrated in FIG. 8;

FIG. 10 is a cross-sectional view showing a state in which an annular projection is formed on the outer periphery of the insertion opening using the ring body of FIG. 8;

FIG. 11 is a sectional view showing a propulsion pipe having an earthquake-resistant function using the insertion ring shown in FIG.

FIG. 12 is a view showing a divided piece formed in an arc shape.

FIG. 13 is a cross-sectional view showing a state in which an annular projection is formed on the outer periphery of the insertion opening by using the divided piece of FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 pipe 2 receiving port 3 pipe 4 insertion port 12 insertion projection 15, 30 ring body 16 divided section 17, 31 meat stealing section 18 projection 19 annular projection 21 propulsion force transmitting member 27 end face 33 divided piece

Claims (2)

[Claims] 1. An insertion port formed at an end of another pipe is inserted into a reception port formed at an end of one pipe to be joined to each other, and an insertion port is inserted into an outer periphery of a tip of the insertion port. A protrusion is formed,
And in a propulsion pipe having a seismic function provided with a detachment prevention function and an expansion / contraction function using the insertion projection between the reception port and the insertion port, an outer periphery of the insertion port that does not enter the reception port An annular projection is provided, and the annular projection has a rectangular cross section and a ring body having one divided portion in the circumferential direction. The ring body is formed by being fitted therethrough and fixed to the outer periphery of the insertion hole, and the ring body is provided with a meat steal portion for facilitating the diameter expansion of the ring body. A projection is formed on the annular projection, and a propulsion force transmission member longer than the axial length of the annular projection is provided so as to be able to engage with the projection along the outer periphery of the annular projection,
The end face of the receptacle is configured to be able to be pressed by the propulsion transmission member, and the transmission of propulsion between the insertion port and the receptacle through the annular protrusion and the propulsion transmission member. A propulsion pipe having an anti-seismic function, characterized in that it is configured as possible. 2. An insertion opening formed at an end of the other pipe is inserted into a receiving opening formed at an end of one of the pipes joined to each other, and an insertion opening is formed at an outer periphery of a tip of the insertion opening. A protrusion is formed,
And in a propulsion pipe having a seismic function provided with a detachment prevention function and an expansion / contraction function using the insertion projection between the reception port and the insertion port, an outer periphery of the insertion port that does not enter the reception port An annular projection is provided, and the annular projection is annularly fixed to the outer periphery of the insertion opening in which a cross-section having a rectangular cross section and divided into a plurality of pieces in the circumferential direction does not enter the receptacle. A projection is formed on the annular projection, and a propulsion force transmitting member longer than the axial length of the annular projection can engage the projection along the outer periphery of the annular projection. The thrust transmitting member is configured to be able to press the end face of the receiving port, and the propulsion is performed between the insertion port and the receiving port via the annular protrusion and the propulsive force transmitting member. Characterized in that it is configured to transmit force. Propulsion tube having a function.