JP2021195979A - Release prevention joint of pipe body, release prevention structure and construction method of release prevention structure - Google Patents

Abstract

To improve a release prevention action and a water stop action of a pipe body by improving the durability of a retention member and a water-tight member arranged between the pipe body and a joint ring.SOLUTION: A release prevention joint of a pipe body is constituted by having: the pipe body 1 composed of a resin member; a press ring 2 inserted into an insert of the pipe body 1 at an external peripheral side; a joint ring 3 inserted into the insert at the external peripheral side coaxially with the press ring 2; a fastening member 4 for integrally fastening the press ring 2 and the joint ring 3; a ring-shaped water stop member 5 interposed between the press ring 2 and the joint ring 3, and pressed to an external peripheral face of the pipe body 1 by the fastening of the fastening member 4; a first stopper part 6 arranged at the joint ring 3; and a second stopper part 7 which is different from the pipe body 1 before the insertion of the pipe body 1, arranged at the external peripheral face of the insert after the insertion of the pipe body 1, abuts on the first stopper part 6 when a withdrawal force acts on the pipe body 1, and retains the pipe body 1.SELECTED DRAWING: Figure 1

Description

The present invention relates to a detachment prevention joint, a detachment prevention structure, and a method of constructing a detachment prevention structure for connecting pipe bodies while preventing them from detaching from each other.

In pipelines such as agricultural water and waterworks, the insertion ports of the pipes are connected to each other by a tubular joint. A watertight member for preventing water leakage is interposed between the pipe body and the joint, and a detachment prevention structure for preventing the joint and the pipe body from detaching is adopted.

For example, in the tube body detachment prevention mechanism shown in Patent Document 1, a locking projection 3 is provided at the tip of the outer peripheral surface of the insertion side tube body 1, and the retaining member 4 and the watertightness are provided on the inner peripheral surface of the receiving side tube body 2. A member 5 is provided.

The locking projection 3 is formed with an inclined surface 3a whose wall thickness in the radial direction decreases toward the tip of the insertion side tube 1, and a contact wall standing outward in the radial direction at the inner end portion. 3b is formed. The locking projection 3 is, for example, a hard member made of a laminated body in which a plurality of resin-impregnated fibers impregnated with resin are laminated. The retaining member 4 is formed with a rounded portion 4a on the inner diameter side thereof that reduces the wall thickness in the radial direction toward the tip of the receiving side tube 2, and is formed in the radial inward direction at the back end portion. An upright contact wall 4b is formed. The watertight member 5 is formed with an annular protrusion 5a that stands up inward in the radial direction on the inner diameter side thereof, and the annular protrusion 5a has a meat in the radial direction toward the tip of the receiving side tube 2. An inclined surface 5b for reducing the thickness is formed, and an upright surface 5c that stands inward in the radial direction is formed at the inner end portion. For the retaining member 4 and the watertight member 5, for example, an elastic body such as rubber is adopted.

When the insertion side tube 1 is connected to the receiving side tube 2, the rounded portion 4a formed on the retaining member 4 and the inclined surface 5b formed on the annular protrusion 5a of the watertight member 5 are deformed. At the same time, it is guided by the inclined surface 3a formed on the locking projection 3. Further, when a pulling force acts on both pipe bodies 1 and 2 as in the case of an earthquake, the contact wall 4b formed on the retaining member 4 is formed on the contact wall 3b formed on the locking projection 3. It abuts and exerts a detachment prevention action (see paragraphs 0016 to 0025 of Patent Document 1, FIG. 1).

Japanese Unexamined Patent Publication No. 2017-2996

In the configuration according to Patent Document 1, when the insertion side pipe body 1 and the receiving side pipe body 2 are connected, the locking projection 3 made of a hard member, the retaining member 4 made of an elastic member, and the watertight member 5 are deformed. It is inserted while receiving frictional force. Therefore, at the time of insertion, the pipe body must be inserted against the insertion resistance, which requires a large amount of labor and an excessive load acts on the retaining member 4 and the watertight member 5. Its durability may decrease.

Therefore, it is an object of the present invention to improve the durability of the retaining member and the watertight member provided between the tubular body and the joint ring, and to improve the detachment prevention action and the water blocking action of the tubular body.

In order to solve the above problems, in the present invention, in the present invention, a tube body made of a resin material, a push ring inserted on the outer peripheral surface side of the insertion port of the tube body, and coaxially with the push ring on the outer peripheral surface side of the insertion port. The joint ring to be inserted, the fastening member that integrally fastens the push ring and the joint ring, and the fastening member are interposed between the push ring and the joint ring, and are pressed against the outer peripheral surface of the tubular body by fastening the fastening member. The ring-shaped water stop member, the first stopper portion provided on the joint ring, and the tube body are separate from the tube body before the insertion, and are attached to the outer peripheral surface of the insertion port after the tube body is inserted. A detachment prevention joint of the tubular body having a second stopper portion that comes into contact with the first stopper portion to prevent the tubular body from coming off when a pulling force is applied to the tubular body is configured.

By doing so, after the push ring, the joint ring, the water stop member, and the first stopper portion are inserted into the pipe body, the second stopper portion can be provided on the pipe body, so that the water stop member and the first stopper can be provided. When the portion is inserted, it does not receive the insertion resistance from the second stopper portion. Therefore, the connecting work of the pipe body can be smoothly performed, the durability of the water blocking member and the first stopper portion can be improved, and the detachment prevention action and the water stopping action of the pipe body can be improved. ..

In the above configuration, the first stopper portion and the second stopper portion may be made of a rigid body.

In this way, when the pulling force acts on the tubular body, the stopper portions made of rigid bodies come into contact with each other, so that a high detachment prevention effect is exhibited. Further, since the stopper portion made of a rigid body is more durable than the stopper portion made of an elastic member such as rubber, the effect of reducing the maintenance frequency can be expected.

In the configuration in which the first stopper portion and the second stopper portion are rigid bodies, the surface and the outer peripheral surface are on the surface of the second stopper portion and the outer peripheral surface of the pipe body around the second stopper portion. It is possible to have a configuration in which a laminated portion containing a resin covering the above is provided.

By doing so, since the first stopper portion and the second stopper portion, which are both rigid bodies, come into contact with each other via the laminated portion, troubles such as cracks due to direct strong contact between the two stopper portions can be prevented. Can be done. Further, since the second stopper portion and the outer peripheral surface of the pipe body are covered with the laminated portion, it is possible to prevent the second stopper portion from falling off from the outer peripheral surface of the pipe body due to the contact with the first stopper portion. can.

Further, in the present invention, the above-mentioned pipe body detachment prevention joint and the said pipe body are attached to the insertion openings of a plurality of pipe bodies arranged adjacent to each other in the axial direction so as to face each other. A detachment prevention structure of a pipe body having a connecting joint ring for connecting the ends of the disconnection prevention joint on the insertion port side is configured.

By doing so, when the connected pipe bodies expand and contract significantly due to a large earthquake or the like, the expansion and contraction can be absorbed by a plurality of pipe bodies, so that the expansion and contraction is concentrated on some of the pipe bodies and the stopper portion is formed. It is possible to surely prevent the trouble of being damaged and falling off from the joint wheel.

Further, in the present invention, an insertion step of inserting a push ring, a ring-shaped water blocking member, and a joint ring in this order on the outer peripheral surface side of the insertion port of the tubular body having a resin material, and an insertion step of inserting the joint ring on the outer peripheral surface of the tubular body. , It is a separate body from the tubular body, and when a pulling force acts on the tubular body, it comes into contact with the first stopper portion provided on the joint ring to attach a second stopper portion that prevents the tubular body from coming off. In the process, the push ring and the joint ring are integrally fastened with a fastening member, and by fastening the fastening member, a ring-shaped waterproof member interposed between the push ring and the joint ring is attached to the outer periphery of the pipe body. A pipe body having a fastening step of pressing against a surface and a connecting step of connecting the joint rings attached to the insertion openings of a plurality of pipe bodies arranged adjacent to each other along the axial direction with a connecting joint ring. The construction method of the detachment prevention structure was constructed.

In this way, after the push ring, the water stop member, and the first stopper portion are inserted into the pipe body, the second stopper portion is provided in the pipe body. Therefore, when the water stop member and the first stopper portion are inserted, the second stopper portion is provided. Does not receive insertion resistance from the second stopper. Therefore, the connecting work of the pipe body can be smoothly performed, the durability of the water blocking member and the first stopper portion can be improved, and the detachment prevention action and the water stopping action of the pipe body can be improved. .. Moreover, since adjacent joint rings are connected by connecting joint rings, when the connected pipe bodies expand and contract significantly due to a large earthquake or the like, the expansion and contraction can be absorbed by multiple pipe bodies, and some of them. It is possible to surely prevent the trouble that the expansion and contraction is concentrated on the pipe body and the joint ring falls off.

In the present invention, the second stopper portion provided on the tubular body is separated from the tubular body before the insertion of the tubular body, and after the insertion, the second stopper portion is attached to the outer peripheral surface of the insertion port of the tubular body. Therefore, when the water blocking member and the first stopper portion are inserted, the insertion resistance from the second stopper portion is not received. Therefore, the connecting work of the pipe body can be smoothly performed, the durability of the water blocking member and the first stopper portion can be improved, and the detachment prevention action and the water stopping action of the pipe body can be improved. ..

Sectional drawing which shows one Embodiment of the detachment prevention structure of the tube body which concerns on this invention. It is sectional drawing which shows one Embodiment of the construction method of the detachment prevention structure of the pipe body which concerns on this invention, (a) is the state which the push ring, the water stop member, and the joint ring are inserted in this order in the pipe body, (b). ) Is a state in which the first stopper portion is provided on the joint ring, (c) is a state in which the second stopper portion is attached to the opening of the pipe body, and (d) is a state in which the push ring and the joint ring are integrally fastened with a fastening member. , (E) is a state in which the joint wheels are connected to each other by a connecting joint ring. In the detachment prevention structure shown in FIG. 1, a cross-sectional view showing a state in which the first stopper portion and the second stopper portion are in contact with each other to prevent the pipe body from coming off. FIG. 1 is a cross-sectional view of the detachment prevention structure, in which (a) is a state in which the pipe bodies are most extended, and (b) is a state in which the pipe bodies are most contracted.

The detachment prevention structure of the pipe body and the detachment prevention joint according to the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2A, the detachment prevention joint used in this detachment prevention structure is a tube body 1 made of a resin material and a push ring inserted into the outer peripheral surface side of the insertion port of the tube body 1. 2, a joint ring 3 inserted coaxially with the push ring 2 on the outer peripheral surface side of the insertion port, a fastening member 4 for integrally fastening the push ring 2 and the joint ring 3, and an interposition between the push ring 2 and the joint ring 3. It is provided with a ring-shaped water blocking member 5 to be formed, a first stopper portion 6 provided on the joint ring 3, and a second stopper portion 7 attached to the outer peripheral surface side of the pipe body 1. The detachment prevention structure is configured by connecting the joint rings 3 of the detachment prevention joints with each other by the connecting joint ring 8.

The tube body 1 is a resin tube having a constant outer diameter over its entire length. Specifically, it is a reinforced plastic composite tube (FRPM tube) in which a fiber reinforced plastic (FRP) and a mortar layer are laminated. A peripheral groove 9 for attaching the second stopper portion 7 is formed on the outer peripheral surface side of the insertion port of the tubular body 1 over the entire circumference thereof. In the peripheral groove 9, a bottomed pin hole 10 that does not penetrate the inner peripheral side is formed at each predetermined angle in the circumferential direction. Instead of the peripheral groove 9, it is also possible to form a stepped portion capable of abutting one end portion in the axial direction of the second stopper portion 7.

The push ring 2 is a steel ring-shaped member having a through hole 11 formed in the center thereof through which the pipe body 1 is passed. Through holes 12 for passing the fastening member 4 in the axial direction are formed in the ring-shaped portion at each predetermined angle in the circumferential direction. The axial end surface of the push ring 2 facing the water stop member 5 is a tapered surface 13 having a normal line inclined toward the axial center of the push ring 2. A gap g1 is formed between the through hole 11 formed in the center of the push ring 2 and the outer peripheral surface of the tubular _{body 1.}

The joint ring 3 is a substantially tubular member made of steel in which a through hole 14 through which the pipe body 1 is passed is formed in the center thereof. On the inner peripheral surface side of the cylinder, a step portion 15 whose inner diameter changes in a stepped manner is formed. A bottomed screw hole 16 extending in the axial direction of the joint ring 3 is formed in the step portion 15. Further, a first flange 17 and a second flange 18 standing outward in the radial direction are formed at the end portion of the cylindrical outer peripheral surface side. The first flange 17 has a through hole 19 for passing the fastening member 4, and the second flange 18 has a through hole 21 for passing the connecting member 20 for connecting the joint ring 3 and the connecting joint ring 8. It is formed. The surface of the joint ring 3 that comes into contact with the water stop member 5 is an arc surface 22 that protrudes toward the water stop member 5.

The fastening member 4 is composed of a T bolt 4a having a T-shaped head and a nut 4b. Instead of the T-bolt 4a, other types of bolts such as hexagon bolts can be adopted.

The water blocking member 5 is made of elastic rubber. The T-bolt 4a is inserted into the through hole 12 formed in the push ring 2 through the through hole 19 formed in the first flange 17 of the joint ring 3, and the nut 4b is screwed from the opposite side of the push ring 2 to fasten the fastening member 4. Then, the push ring 2 and the joint ring 3 approach each other in the axial direction, and the water stop member 5 interposed between the push ring 2 and the joint ring 3 is pressed against the outer peripheral surface of the tubular body 1. Since the watertightness is enhanced by this pressing, water leakage from between the pipe body 1 and the joint ring 3 can be reliably prevented. In this configuration, since the tapered surface 13 is formed on the push ring 2 and the arc surface 22 is formed on the joint ring 3, the tapered surface 13 and the arc surface 22 make the water blocking member 5 strong on the outer peripheral surface of the pipe body 1. Be pressed. Therefore, high watertightness between the pipe body 1 and the joint ring 3 can be ensured.

The first stopper portion 6 is composed of two semi-ring-shaped members obtained by dividing the ring-shaped member into two in the circumferential direction. The material of the first stopper portion 6 is steel, which is a rigid body. In the ring-shaped portion, through holes penetrating in the axial direction are formed at predetermined angles in the circumferential direction. After fitting the first stopper portion 6 into the stepped portion 15 formed on the inner peripheral surface side of the joint ring 3, the hexagon bolt 23 is inserted into the through hole formed in the ring-shaped portion, and the joint ring 3 is inserted. When the hexagon bolt 23 is screwed into the screw hole 16 formed in the first stopper portion 6, the first stopper portion 6 is fixed to the inner peripheral surface of the joint ring 3. _{In this fixed state, a gap g 2} is formed between the inner peripheral surface of the ring of the first stopper portion 6 and the outer peripheral surface of the tubular body 1. The first stopper portion 6 can also be integrally formed with the joint ring 3.

As described above, between the through hole 11 formed in the center of the push ring 2 and the outer peripheral surface of the tubular body 1, and between the inner peripheral surface of the ring of the first stopper portion 6 and the outer peripheral surface of the tubular body 1. a gap g _1, g ₂ is formed, a slight bending between the tube 1 and the collar 3 are allowed.

The second stopper portion 7 is composed of two semi-ring-shaped members obtained by dividing the ring-shaped member into two in the circumferential direction. The material of the second stopper portion 7 is steel, which is a rigid body like the first stopper portion 6. In the ring-shaped portion, through holes penetrating in the radial direction are formed at predetermined angles in the circumferential direction. The second stopper portion 7 is fitted into a peripheral groove 9 (see FIG. 2A) formed on the outer peripheral surface side of the tubular body 1, and then a through hole and a pin hole 10 formed in a ring-shaped portion. Insert the pin 24 into (see FIG. 2A).

The shapes of the first stopper portion 6 and the second stopper portion 7 are not limited to the ring shape. If both stoppers 6 and 7 come into contact with each other when a pulling force is applied to the tubular body 1 to exert the retaining action, for example, a block-shaped member provided at a predetermined angle in the circumferential direction may be used. can.

On the surface of the second stopper portion 7 and the outer peripheral surface of the tubular body 1 around the second stopper portion 7, a laminated portion 25 made of a resin-impregnated fiber that covers the surface and the outer peripheral surface is provided. The material of the laminated portion 25 is not limited to this, and a resin material, a metal, a mortar, or a laminated body in which these are laminated can also be appropriately adopted.

When the materials of the first stopper portion 6 and the second stopper portion 7 are made of a rigid body, a pulling force acts on the pipe body 1 and a high detachment prevention effect is exhibited when both stopper portions 6 and 7 come into contact with each other. Further, since the stopper portions 6 and 7 made of a rigid body are more durable than the stopper portions made of an elastic member such as rubber, the effect of reducing the maintenance frequency can be expected. Moreover, since the laminated portion 25 is provided on the second stopper portion 7, the first stopper portion 6 and the second stopper portion 7, which are both rigid bodies, come into contact with each other via the laminated portion 25. Therefore, it is possible to prevent troubles such as cracks from occurring when both the stopper portions 6 and 7 are in direct and strong contact with each other. Further, since the second stopper portion 7 and the outer peripheral surface of the tubular body 1 are covered with the continuous laminated portion 25, the second stopper portion 7 is brought from the outer peripheral surface of the tubular body 1 due to the contact with the first stopper portion 6. It can be prevented from falling off.

As shown in this embodiment, instead of providing the laminated portion 25 in the second stopper portion 7, the first stopper portion 6 may be provided with the laminated portion 25. Further, the laminated portion 25 may be provided on both the stopper portions 6 and 7. Alternatively, the laminated portion 25 may not be provided on any of the stopper portions 6 and 7.

In the above embodiment, the laminated portion 25 is formed only on the outer peripheral surface of the second stopper portion 7 and the surrounding pipe body 1, but up to the inner peripheral surface of the pipe body 1 so as to involve the insertion port end portion of the pipe body 1. The laminated portion 25 can also be extended. By doing so, for example, when the insertion openings of adjacent pipe bodies 1 come into contact with each other due to the shaking of an earthquake (see FIG. 4B), the insertion openings can be protected from damage.

The connecting joint ring 8 is a substantially cylindrical member made of steel in which a through hole 26 through which the pipe body 1 is passed is formed in the center thereof. Flange 27s that stand outward in the radial direction are formed at both ends of the cylindrical outer peripheral surface side. Each flange 27 is formed with a through hole 28 for passing a connecting member 20 that connects the joint ring 3 and the connecting joint ring 8. The connecting member 20 is composed of a hexagon bolt 20a and a nut 20b. The hexagon bolt 20a is inserted into the through hole 28 formed in the connecting joint ring 8 through the through hole 21 formed in the second flange 18 of the joint ring 3, and the nut 20b is screwed in from the opposite side of the connecting joint ring 8 to connect. When the member 20 is fastened, the joint ring 3 and the connecting joint ring 8 are connected. A ring-shaped watertight member 29 is sandwiched between the second flange 18 of the joint ring 3 and the flange 27 of the connecting joint ring 8, and the watertight member 29 ensures watertightness between the flanges 18 and 27. ..

The procedure of the construction method of the pipe body detachment prevention structure will be described with reference to FIGS. 2A to 2E. In this construction method, first, the push ring 2, the ring-shaped water blocking member 5, and the joint ring 3 are inserted in this order on the outer peripheral surface side of the insertion port of the pipe body 1 (insertion step) (see FIG. 2A). ). At this stage, since the second stopper portion 7 (see FIG. 2C) has not yet been attached to the insertion port of the tubular body 1, the water blocking member 5 or the like can be inserted without resistance. Therefore, the work can be smoothly performed, and the durability can be improved because an excessive load does not act when the water blocking member 5 or the like is inserted.

After inserting the push ring 2 or the like into the tubular body 1, the first stopper portion 6 is fitted into the step portion 15 formed on the inner peripheral surface side of the joint ring 3, and the first stopper portion 6 is passed through the through hole formed in the first stopper portion 6. A hexagon bolt 23 is screwed into the screw hole 16 formed in the joint ring 3, and the first stopper portion 6 is fixed to the inner surface side of the joint ring 3 (see FIG. 2B).

Next, the second stopper portion 7 is fitted into the peripheral groove 9 formed on the outer peripheral surface side of the insertion port of the tubular body 1, and is formed in the tubular body 1 through the through hole formed in the second stopper portion 7. The pin 24 leading to the pin hole 10 is inserted (mounting step). Further, a laminated portion 25 made of resin-impregnated fibers is provided on the surface of the second stopper portion 7 and the outer peripheral surface of the tubular body 1 around the second stopper portion 7 (see FIG. 2C).

The method of providing the laminated portion 25 is not particularly limited, and for example, a hand lay-up method can be adopted. In the hand lay-up method, a mat-like reinforcing fiber is provided on a portion where the laminated portion 25 is desired to be provided (in this embodiment, the surface of the second stopper portion 7 and the outer peripheral surface of the tubular body 1 around the second stopper portion 7). Is a method of impregnating the reinforcing fibers with resin by manual work such as brushing and rollers. According to the hand lay-up method, FRP lining can be applied more uniformly than the conventional lining method in which a mixture of resin and reinforcing fibers is spray-coated on a portion where the laminated portion 25 is desired to be provided.

Further, the T bolt 4a is inserted into the through hole 12 formed in the push ring 2 through the through hole 19 formed in the first flange 17 of the joint ring 3, and the nut 4b is screwed from the opposite side of the push ring 2 to screw the fastening member 4. When the bolts 2 and the joint ring 3 are fastened to each other in the axial direction, the water blocking member 5 interposed between the push ring 2 and the joint ring 3 is pressed against the outer peripheral surface of the tubular body 1 (fastening step). ) (See FIG. 2 (d)). Since the watertightness is enhanced by this pressing, water leakage from between the pipe body 1 and the joint ring 3 can be reliably prevented.

Finally, the hexagon bolt 20a is inserted into the through hole 28 formed in the connecting joint ring 8 through the through hole 21 formed in the second flange 18 of the joint ring 3, and the nut 20b is inserted from the opposite side of the connecting joint ring 8. When the connecting member 20 is screwed in and fastened, the joint ring 3 and the connecting joint ring 8 are connected (connecting step). A ring-shaped watertight member 29 is sandwiched between the second flange 18 of the joint ring 3 and the flange 27 of the connecting joint ring 8, and the watertight member 29 ensures watertightness between the flanges 18 and 27. ((See FIG. 2 (e))).

When a pulling force (force in the direction indicated by the white arrow in FIG. 3) acts on the pipe body 1 provided with the detachment prevention joint, the pipe body 1 exerts the force on the detachment prevention joint as shown in FIG. The first stopper portion 6 and the second stopper portion 7 come into contact with each other by sliding in the action direction of the above. Then, the sliding of the pipe body 1 is prevented by this contact, and the pipe body 1 is prevented from coming off. At this time, since the first stopper portion 6 and the second stopper portion 7 come into contact with each other via the laminated portion 25, troubles such as cracks are prevented due to the direct and strong contact between the stopper portions 6 and 7. be able to. Further, since the second stopper portion 7 and the outer peripheral surface of the tubular body 1 are covered with the continuous laminated portion 25, the second stopper portion 7 is brought from the outer peripheral surface of the tubular body 1 due to the contact with the first stopper portion 6. It can be prevented from falling off.

Further, in this detachment prevention structure, as shown in FIG. 4A, the adjacent pipe bodies 1 are most separated from each other, and the second stopper portion 7 attached to both pipe bodies 1 is the first stopper portion. As shown in FIG. 4 (b), a very large stretchable length is secured from the state of the maximum length in contact with 6 to the state of the minimum length in which adjacent pipe bodies 1 are in contact with each other at the insertion port. be able to. Therefore, even when the pipeline is greatly expanded and contracted during an earthquake, it is possible to reliably prevent the tubular body 1 from detaching.

The detachment prevention joint, the detachment prevention structure, and the construction method of the detachment prevention structure described in the above embodiment are merely examples, and the retaining member provided between the tube body 1 and the joint ring 3 and the retaining ring 3 are provided. As long as the problem of the present invention of improving the durability of the water blocking member 5 and improving the detachment prevention action and the water stopping action of the pipe body 1 can be solved, the shape, arrangement, number, and the number of the constituent members thereof. The material etc. can be changed as appropriate.

1 Pipe 2 Push ring 3 Joint ring 4 Fastening member 4a T bolt 4b Nut 5 Water stop member 6 First stopper part 7 Second stopper part 8 Connecting joint ring 9 Circumferential groove 10 Pin hole 11, 12 (formed in the push ring) Through hole 13 Tapered surface 14, 19, 21 Through hole 15 Stepped portion 16 Threaded hole 17 First flange 18 Second flange 20 Connecting member 20a Hexagon bolt 20b Nut 22 Arc surface 23 Hexagon bolt 24 pin 25 Laminated parts 26, 28 Through holes 27 (formed in connecting joint rings) Flange 29 Watertight member

Claims (5)

A tube made of resin material (1) and
A push ring (2) inserted into the outer peripheral surface side of the insertion port of the tube body (1), and
A joint ring (3) inserted coaxially with the push ring (2) on the outer peripheral surface side of the insertion port,
A fastening member (4) for integrally fastening the push ring (2) and the joint ring (3),
With the ring-shaped water blocking member (5) interposed between the push ring (2) and the joint ring (3) and pressed against the outer peripheral surface of the pipe body (1) by fastening the fastening member (4). ,
The first stopper portion (6) provided on the joint ring (3) and
Before the insertion of the tube (1), it is a separate body from the tube (1), and after the insertion of the tube (1), it is attached to the outer peripheral surface of the insertion port and the pulling force is applied to the tube (1). A second stopper portion (7) that comes into contact with the first stopper portion (6) to prevent the tubular body (1) from coming off when the
A joint that prevents the pipe from coming off. The detachment prevention joint for a tubular body according to claim 1, wherein the first stopper portion (6) and the second stopper portion (7) are made of a rigid body. A laminated portion containing a resin covering the surface and the outer peripheral surface on the surface of the second stopper portion (7) and the outer peripheral surface of the tubular body (1) around the second stopper portion (7). 25) The detachment prevention joint of the tubular body according to claim 2. The prevention of detachment of the pipe bodies according to any one of claims 1 to 3, which are attached to the insertion ports of a plurality of pipe bodies (1) arranged adjacent to each other in the axial direction so as to face each other. With the joint,
A connecting joint ring (8) that connects the ends of the pipe body detachment prevention joint on the insertion port side, and
A detachment prevention structure for the tubular body. An insertion step of inserting a push ring (2), a ring-shaped water blocking member (5), and a joint ring (3) in this order on the outer peripheral surface side of the insertion port of the pipe body (1) having a resin material.
A first stopper provided on the joint ring (3) on the outer peripheral surface of the pipe body (1), which is separate from the pipe body (1) and when a pulling force acts on the pipe body (1). The mounting process of attaching the second stopper portion (7) that comes into contact with the portion (6) and prevents the pipe body (1) from coming off.
The push ring (2) and the joint ring (3) are integrally fastened by the fastening member (4), and by fastening the fastening member (4), an interposition is provided between the push ring (2) and the joint ring (3). A fastening step of pressing the mounted ring-shaped water blocking member (5) against the outer peripheral surface of the pipe body (1), and
A connecting step of connecting the joint rings (3) attached to the insertion ports of a plurality of pipe bodies (1) arranged adjacent to each other along the axial direction with a connecting joint ring (8).
Construction method of the detachment prevention structure of the pipe body having.

Images