JP2001349477A - Flexible drain pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flexible drain pipe having strength, flexibility, a smooth drainage property, and a good sealing property of a hose body and a pipe joint, capable of improving durability. SOLUTION: The drain pipe H1 includes a hose body 7, a pipe joint 11, a cylinder-shaped connecting ring 18 for joining end parts 7a, 7b of the hose body and the pipe joint 11, and a sealing material 25. The hose body 7 includes an inner tube part 8 formed of a cylinder-shaped soft synthetic resin having a smooth inner circumferential surface, and a bellows-shaped outer tube part 9 formed of hard synthetic resin for providing rigidity in a radius direction to the inner tube part 8 while maintaining flexibility of the inner tube part 8. The inner tube part 8 is formed of plasticizer-less soft synthetic resin.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible drainage pipe which can be used not only indoors but also outdoors under earth pressure for the purpose of seismic isolation.
For example, flexible drainage pipes that can be used to guide drainage, including rainwater drained from bathrooms, toilets, gutters, etc., of houses to sewage masses, or drainage drained from houses, such as condominiums, to common vertical pipes About.

[0002]

2. Description of the Related Art Conventionally, for example, when drainage from a bathroom or a toilet in a house is led to a sewage mass, a drainage connection pipe made of a hard vinyl chloride pipe has been used.

[0003] However, the house side and the sewage cell side to which the drain connection pipe itself is connected are also made of hard vinyl chloride. Therefore, if an earthquake occurs, the hard polyvinyl chloride pipe as the drain connection pipe is broken. I was

In this case, in consideration of burying in the soil,
Instead of a drain connection pipe, a drain pipe using a bellows-like pipe having strength and flexibility may be used, but the inner peripheral surface is not smooth, and a situation where dirt adheres may be caused. Is not preferred.

If the inner peripheral surface is to be connected to a predetermined connection portion with good sealing properties even if the inner peripheral surface is smooth, the hose body is connected to the hose body as a drain pipe and connected to the connection port of the predetermined connection portion. Possible fittings are required.

However, in this case, it is necessary to consider the sealing performance of the joint between the hose body and the pipe joint.

Therefore, as disclosed in Japanese Patent Application Laid-Open No. H11-37378 and Japanese Utility Model Registration No. 3064344, strength and flexibility can be ensured to prevent crushing and breakage in the event of an earthquake. A drain pipe has been proposed which can smoothly drain water by suppressing adhesion and has a good sealing property between a hose body and a pipe joint for connecting the hose body to a connection port of a predetermined connection portion. Was.

The drainage pipe disclosed in the above publication includes a hose body, a pipe joint connected to both ends of the hose body, a connection ring for connecting the pipe joint to the hose body, and a seal material. Was.

The hose body is fixed to the cylindrical inner cylindrical portion made of soft vinyl chloride having a smooth inner peripheral surface and the outer peripheral surface of the inner cylindrical portion, and the flexibility of the inner cylindrical portion is maintained. And a bellows-shaped outer cylinder portion made of hard vinyl chloride, which imparts radial rigidity to the inner cylinder portion.

However, if the inner cylinder portion exhibiting flexibility is made of soft vinyl chloride, the soft vinyl chloride contains 40% by weight or more of a plasticizer, and the drain pipe is buried in the soil for a long time. In such cases, the plasticizer migrates into the soil, etc., making it easier to degrade, and with the migration of the plasticizer,
Since the transfer of the contained antioxidant into the soil is also promoted, it is further liable to be deteriorated, and there is a possibility that water leaks from the hose body.

The present invention solves the above-mentioned problems, and provides a drain pipe having strength, flexibility, smooth drainage properties, and good sealing properties between a hose body and a pipe joint. It is an object of the present invention to provide a flexible drain pipe capable of improving the quality.

[0012]

SUMMARY OF THE INVENTION A flexible drain pipe according to the present invention has a cylindrical inner cylindrical portion made of a soft synthetic resin having a smooth inner peripheral surface, and is fixed to the outer peripheral surface of the inner cylindrical portion. A hose body having a bellows-shaped outer cylinder portion made of a hard synthetic resin that maintains the flexibility of the inner cylinder portion and imparts radial rigidity to the inner cylinder portion; A pipe joint configured to be joined to an end portion so as to be connectable to a predetermined connection port and to smoothly continue an inner peripheral surface from the connection port to the end of the hose body at the time of connection; A cylindrical connecting ring for joining the end of the hose body and the pipe joint by fitting the ridge provided on the outer pipe part into the concave groove on the outer peripheral side of the outer cylinder part and joining the pipe joint. And a sealing member disposed between the end of the hose body and the pipe joint to ensure watertightness. , A flexible drainage pipe configured wherein the inner cylindrical portion, characterized in that it is formed from a plasticiser-less type of soft synthetic resin material.

In the case where the outer cylindrical portion of the hose main body is formed in a bellows shape with a corrugated axial section so that the concave groove is an annular concave groove that is intermittent in the axial direction. The end of the hose body with the connecting ring externally attached thereto can be inserted into the inner peripheral side of the joint on the end side where the end of the hose main body is joined, and the inner peripheral surface is tapered to narrow the inner peripheral surface in the insertion direction. The coupling ring is provided and configured, and the connecting ring is configured such that the outer peripheral surface side is a tapered surface that can be pressed against the inner peripheral surface of the coupling cylindrical portion of the pipe joint, Furthermore, the end of the hose body can be provided as an outer body, a divided body divided into a plurality of pieces in the circumferential direction, or a single piece having a slit that penetrates the inner and outer circumferences so that the diameter can be increased, and the ridge is formed in the annular shape. Attach the connection ring to the end of the hose body while fitting it into the groove. In such a state, the connection ring is fitted into the connection cylinder so as to compress the sealing material and the connection ring by the inner peripheral surface of the connection cylinder of the pipe joint, and the tapered surface of the connection ring It is preferable that the end of the hose main body and the pipe joint are joined by bonding an inner peripheral surface of the connecting cylinder.

Further, a plurality of locking portions are provided substantially radially on the connection ring, and the locking portions are locked on locked portions provided on the pipe joint, so that the connection ring is fixed to the pipe joint. It is desirable to keep it from falling off.

It is preferable that a second seal member is provided between the protrusion of the connection ring and the annular groove of the hose body.

Further, the outer cylinder of the hose body is
In the case of a bellows shape with a wavy axial cross section, such that the outer circumferential groove is an annular groove that is intermittent in the axial direction,
The connection ring can be exteriorly provided at an end of the hose main body, a hose exterior portion having the ridge on an inner peripheral surface, and an exterior can be exteriorly provided at an end of the pipe joint, and a fitting portion of the pipe joint is provided. On the other hand, a joint exterior part having a fitting part to be fitted on the inner peripheral surface so as to regulate the movement of the connection ring along the axial direction,
The hose body and the pipe joint are configured as a single unit having a slit that penetrates the inner and outer peripheries so that the hose body and the pipe joint can be covered, and further, the hose body and the pipe An engaging means capable of regulating the diameter expansion of the joint and the end after the exterior is provided and configured to fit the projection into the annular groove while expanding the diameter of the connection ring. Fitting the fitting portion to the fitting portion, and externally covering the connection ring on both ends of the hose body and the pipe joint, and regulating the diameter of the connection ring by the locking means. Accordingly, it is desirable that the end of the hose body and the pipe joint be joined.

In this case, the connection ring may be screwed together to regulate the diameter expansion.

[0018]

According to the flexible drain pipe of the present invention,
Since the inner cylinder part of the hose body is made of a plasticizer-less type soft synthetic resin material, even if it is buried in the soil for a long time, deterioration due to migration of the plasticizer, etc. is suppressed,
Durability can be improved.

Of course, since the hose body has a predetermined outer cylindrical portion made of hard synthetic resin fixed around the inner cylindrical portion made of soft synthetic resin, the drainage pipe can secure strength and flexibility. .
Further, the hose body is configured so as to smooth the inner peripheral surface of the inner cylindrical portion, and that the pipe joint smoothly continues the inner peripheral surface from the connection port at the time of connection to the end of the hose main body. Therefore, the drain pipe can ensure smooth drainage. further,
Since the pipe joint and the end of the hose body are joined by using a predetermined connecting ring and a seal material, good sealing performance between the pipe joint and the end of the hose body can be ensured.

Therefore, the flexible drainage pipe according to the present invention has improved strength, flexibility, smooth drainage, and good sealing performance between the hose body and the pipe joint. it can.

[0021] In the construction as described in claim 2, the cross section in the axial direction is corrugated so that the outer cylindrical portion of the hose body is an annular concave groove in which the concave groove is intermittent in the axial direction. Even with the bellows shape, the joint strength between the pipe joint and the end of the hose body can be improved.

That is, the connecting ring is externally fitted to the end of the hose body while the ridge is fitted into the annular groove, and in this state, the connecting ring is fitted into the connecting cylinder so as to compress the sealing material. Then, the connecting ring is bonded to the connecting tube portion of the pipe joint in a state where the ridge is fitted into the annular groove and the end of the hose body is locked. Furthermore, since the inner peripheral surface of the coupling cylindrical portion has a tapered shape that narrows the inner peripheral surface in the insertion direction, and the outer peripheral surface of the connecting ring has a tapered surface corresponding to the tapered inner peripheral surface, the connecting ring has It will be firmly joined to the pipe joint.

Therefore, in the case of the second aspect, the cross section in the axial direction is corrugated so that the outer cylindrical portion of the hose body is an annular concave groove in which the concave groove is intermittent in the axial direction. Even if it has a bellows shape, the pipe joint and the end of the hose main body can be joined with improved joining strength.

In particular, when the connecting ring is formed as a single body provided with slits and whose diameter can be enlarged, the hose body is restored while restoring the expanded connecting ring as compared with the case where the connecting ring is formed of a plurality of divided bodies. If the connection ring is provided at the end, the connection ring is locked to the end of the hose body so as to wrap around the end of the hose body and does not fall, so that the subsequent insertion work of the connection ring into the connection cylinder can be facilitated. That is, the connecting ring is formed of a single member, and the number of parts is reduced, and thus, the efficiency of the exterior work of the connecting ring, and thus, the efficiency of the on-site construction work of the drainage pipe can be improved. .

[0025] Further, in the case of the third aspect, the plurality of locking portions of the connection ring are locked to the locked portions of the pipe joint to prevent the connection ring from coming off the pipe joint. Can be. In other words, until the joining (for example, bonding) between the outer peripheral surface of the connecting ring and the inner peripheral surface of the pipe joint is completed, the connecting ring is securely held to the pipe joint, so that the hand is completely handed until the bonding is completed. May be separated from each other, so that the workability for the joining is improved and the positional accuracy of the joining can be secured.

Further, if a second sealing material is provided between the ridge of the connecting ring and the annular groove of the hose body as in claim 4, the inner peripheral surface of the connecting ring becomes the second sealing material. With this sealing material, the sealing performance with respect to the hose body is ensured. And since the outer peripheral surface (tapered surface) side of the connection ring is adhered to the inner peripheral surface of the coupling cylinder portion in the pipe joint, a sealing property is secured between the coupling ring and the coupling cylinder portion.
As a result, in addition to the first sealing material provided between the end of the hose body and the pipe joint, the inner and outer peripheral surfaces of the connecting ring also
The sealing performance is ensured with respect to the end of the hose main body and the pipe joint connecting cylinder, so that further sealing performance between the end of the hose main body and the pipe fitting can be ensured.

Also, in the case of the fifth aspect, the cross section in the axial direction is corrugated so that the outer cylindrical portion of the hose body is an annular concave groove in which the concave groove is intermittent in the axial direction. Even with the bellows shape, the joint strength between the pipe joint and the end of the hose body can be improved.

That is, if the diameter of the connecting ring is increased by restricting the diameter of the connecting ring to both ends of the hose body and the pipe joint while restoring the connecting ring while restoring the connecting ring, the protrusion of the connecting ring is prevented. Is fitted in the annular groove at the end of the hose body,
In addition, the fitting portion of the connection ring is fitted to the fitted portion of the pipe joint by restricting movement of the connection ring along the axial direction, and as a result, the end of the hose body is connected to the connection ring. The movement of the portion and the pipe joint along the axial direction of the hose main body is regulated, and the two are joined. Then, the diameter of the connection ring is regulated by the locking means, and the connection ring is prevented from coming off from the annular groove of the ridge and from coming off the fitted portion of the fitting portion. The ends can be joined with improved joining strength.

In particular, the relative movement of the hose body and the pipe joint in the axial direction of the hose body is restricted by using the ridge and the fitting portion of the connecting ring provided at the ends of the hose body and the pipe joint. As a result, it is possible to join the pipe joint and the end of the hose body without using an adhesive, and as a result, the joining process of the hose body end and the joint of the pipe body can be omitted. Thus, the efficiency of the construction work at the site of the drainage pipe can be improved.

In this case, according to the sixth aspect,
By screwing, the connecting ring after the outer ends of the hose body and the pipe joint are covered with each other is expanded so as to cause the protrusion to come off from the annular concave groove and the fitting portion to come off from the fitted portion. Since the diameter is regulated, the joint strength between the pipe joint and the end of the hose body can be further improved.

[0031]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

The flexible drain pipe H1 of the first embodiment
As shown in FIG. 2, the wastewater
Until then, as shown in Figs. 1 and 3,
A hose body 7; a pipe joint 11 joined to both ends 7a and 7b of the hose body 7; a connection ring 18 disposed between the hose body 7 and the pipe joint 11;
7.28.

The hose body 7 is, as shown in FIGS.
An inner cylindrical portion 8 made of a cylindrical soft synthetic resin having a smooth inner peripheral surface.
Is fixed to the outer peripheral surface of the inner cylindrical portion 8 and
And a bellows-shaped outer cylindrical portion 9 made of a hard synthetic resin for imparting rigidity in the radial direction to the inner cylindrical portion 8 while maintaining flexibility.

The inner cylinder portion 8 is not of a type having a large plasticizer content (normally 40% by weight or more), such as soft vinyl chloride, and has a low plasticizer content (normally 10% by weight or less). Or, a type that does not contain at all, that is, these plasticizer-less type soft synthetic resin materials are used,
The outer cylinder 9 is formed of a synthetic resin material similar to the inner cylinder 8 so that the outer cylinder 9 can be easily welded or bonded to the inner cylinder 8. Examples of the plasticizer-less type synthetic resin material include a polyethylene / polypropylene / olefin-based thermoplastic elastomer. An olefin-based synthetic resin material such as polyethylene and polypropylene is desirable for those without a plasticizer and in which two types, hard and soft, can be easily obtained. In the embodiment, the inner and outer cylinder portions 8 and 9 are made of polyethylene.

Further, the outer cylinder 9 is provided so as to cover and protect the surface of the inner cylinder 8 without impairing the flexibility of the inner cylinder 8, and in the case of the embodiment, As an annular groove 9c in which the groove is intermittent in the axial direction, an inverted U-shaped cross section is formed in a bellows shape having a corrugated axial cross section, in which a protruding portion 9a and a bottom portion 9b are repeated in the axial direction. I have.

The hardness of the inner cylindrical portion 8 may be such that the hose body 7 has flexibility to be bent, and the hardness of the outer cylindrical portion 9 is determined by the flexibility of the inner cylindrical portion 8. In a state without inhibition
It is sufficient that the inner cylinder part 8 is harder than the inner cylinder part 8 and that the inner cylinder part 8 is given rigidity in the radial direction.

Then, the hose body 7 of the embodiment is manufactured by using a tube made of an inner tube portion forming material so as to form the inner tube portion 8 on the inner peripheral surface of the corrugated bottom 9 b of the outer tube portion 9. The hose body 7 is manufactured by welding the inner cylindrical portion 8 to the outer cylindrical portion 9 while softening and expanding a tubular polyethylene tube.

The pipe joint 11 to which the hose body 7 is joined
(11F · 11M) is made of a hard synthetic resin such as hard vinyl chloride, and is joined to the ends 7a and 7b of the hose body 7 and has a predetermined connection port (in the embodiment, the nipple portion 2 of the wastewater mass 1 and the drain pipe). 4) It is configured so as to be connectable to 2.4, and the hose body ends 7a and 7 are connected from the connection ports 2.4 at the time of connection.
The inner peripheral surface up to “b” is configured to be smoothly continuous. Then, the hose body ends 7a and 7 of the pipe joint 11
On one end side for joining b, a coupling cylinder portion 12 is formed,
At the other end to be connected to the connection ports 2 and 4, a connection cylinder 16
(16F · 16M) are formed.

The connecting cylinder 12 is provided on the inner peripheral surface thereof with the connecting ring 1.
8 is provided with an insertion recess 14 into which the end portions 7a and 7b of the hose body 7 having the exterior 8 can be inserted on the inner peripheral side, and a cutout recess 15 into which a connection ring 18 can be fitted is formed on the end surface side of the insertion recess 14. Have been. The inner peripheral surface of the notch recess 15 is a tapered surface 15a that narrows the inner peripheral surface toward the insertion direction of the hose body ends 7a and 7b.

A protrusion 13 is provided at the end of the connecting cylinder portion 12 on the insertion direction side of the hose body ends 7a and 7b so as to be flush with the inner peripheral surfaces of the hose body ends 7a and 7b. Is formed.

The connecting cylinder 16 has a female-type connecting cylinder 16F fitted and connected to the drain pipe 4 and a male-type connecting cylinder 16M fitted and connected to the connection recess 2a of the nipple 2.
And, two kinds of are prepared. The female connection cylinder 16F has a connection recess 1 for accommodating the drain pipe 2 on the inner peripheral surface.
6a are formed. Male type connection tube 16M
Are formed flush with the inner peripheral surface from the ridge 13.

It is to be noted that, for example, a pipe joint 11F having a female-type connecting cylinder 16F of the same type may be joined to both ends 7a and 7b of the hose body 7 in correspondence with the mating side to be connected. .

The connecting ring 18 is used for joining the hose body 7 and the pipe joint 11, and is made of a hard synthetic resin such as hard vinyl chloride.
0 and a rib 22 protruding from the outer peripheral surface at one end. The rib 22 is connected to the connecting ring 18.
At the time of fitting into the notch recess 15, the end portions of the hose main body ends 7 a and 7 b are brought into contact with the end surfaces of the respective connection cylinder portions 12 of the pipe joint 11 to position the pipe joint 11. The inner peripheral surface 20b of the main body 20 is formed with a ridge 21 that fits over the entire circumferential periphery of the annular concave groove 9c on the end portions 7a and 7b of the hose main body 7. Further, the outer peripheral surface of the main body 20 is a tapered surface 20a which can be pressed against the tapered surface 15a of the coupling tubular portion 12 of the pipe joint 11.

Then, as shown in FIG. 5, the connecting ring 18 of the embodiment is divided into two parts 19.1.
9. The side surface 19a of each divided body 19 that comes into contact when the connecting ring 18 is formed is a tapered surface whose thickness is reduced toward the tip.

The first seal member 27 is formed of a water-swelling rubber, is disposed in the annular groove 9c near the end surfaces of the hose body ends 7a and 7b, and is connected to the outer peripheral surfaces of the hose body ends 7a and 7b and the pipe. The joint 11 is pressed against the entire circumference in the circumferential direction with the inner peripheral surface 12a of the coupling cylindrical portion 12 to ensure watertightness. As the first sealing material 27, besides a putty shape and a sponge shape, a liquid material can be used, and a material that absorbs moisture and expands about 3 to 5 times is used. In the case of the embodiment, a sponge-like round bar-shaped material having an outer diameter corresponding to the cross-sectional shape of the annular groove 9c is used, and the material is compressed over the entire circumference of the annular groove 9c in the circumferential direction. And cut into a length that can be arranged, and pushed into the annular groove 9c to be arranged.

In the case of the embodiment, the second sealing material 28 is formed of an annular rubber packing such as silicon rubber, and the ridge 21 of the connecting ring 18 and the annular groove of the hose body into which the ridge 21 is fitted. 9c and the bottom surface.

The connection operation according to the first embodiment will be described. As shown in FIG.
The first sealing material 27 is fitted into the annular groove 9c, and the second sealing material 28 is fitted into the annular groove 9c of the hose body 7 into which the ridge 21 of the connecting ring 18 is fitted. deep.

Then, the connecting tubular portion 12 of the pipe joint 11 is
The adhesive C is applied to the inner peripheral surface 15a of the notch recess 15 in the above, and the ridge 21 is fitted into the predetermined annular concave groove 9c, so that each of the divided bodies 19 is connected to the outer peripheral surface of the hose body end 7a. And the connecting ring 18 is sheathed on the hose body end 7a. In this state, the hose body end 7a together with the connecting ring 18 is connected to the pipe joint 11F until the rib 22 is brought into contact with the end face of the connecting cylinder 12. The joining operation between the hose body 7 on the end portion 7a side and the pipe joint 11F can be completed by inserting the hose body 7 into the connecting tubular portion 12 of the above.

Similarly, the other end 7 of the hose body 7
On the b side, the drain pipe 4 is fitted to the pipe joint 11M by the same operation as described above, and then, as shown in FIG. 2, the connection pipe 16F of the pipe joint 11F on the hose body end 7a side. , Pipe joint 11M on the hose body end 7b side
Is fitted to the nipple portion 2 of the sewage mass 1 and then covered with soil, whereby the work of laying the drain pipe 4 and the like can be completed.

In the drain pipe H1 of the first embodiment buried as described above, since the inner cylindrical portion 8 of the hose body 7 is made of a plasticizer-less type soft polyethylene, it is buried in the soil for a long time. Also, deterioration due to migration of the plasticizer or the like is suppressed, and durability can be improved.

Of course, the hose body 7 has a predetermined outer cylindrical portion 9 made of a hard synthetic resin fixed around an inner cylindrical portion 8 made of a soft synthetic resin, so that the drain pipe H1 has strength and flexibility. And can be secured. Further, the hose body 7 is
And the pipe joint 11 is configured so that the inner peripheral surface from the connection port 2.4 at the time of connection to the hose body ends 7a and 7b smoothly continues. The drain pipe H1 can ensure smooth drainage. Further, the pipe joint 11 and the hose body end portion 7 are formed by using a predetermined connecting ring 18 and a sealing material 27 made of a water-swelling rubber.
Since a and 7b are joined, good sealing performance between the pipe joint 11 and the hose body ends 7a and 7b can also be ensured.

Therefore, in the flexible drain pipe H1 of the first embodiment, strength, flexibility, smooth drainage, and
A good seal between the hose body 7 and the pipe joint 11 is provided, and the durability can be improved.

In the embodiment, the inner cylinder 8 and the outer cylinder 9
Since the inner cylinder 8 and the outer cylinder 9 are made of the same type of polyethylene, the inner cylinder 8 and the outer cylinder 9 can be easily fixed to each other by welding, and the hose body 7 can be easily manufactured.

Further, in the first embodiment, the hose body 7
The pipe joint 11 and the hose body end portions 7a and 7b may be formed in a bellows shape having a corrugated axial cross section so that the outer cylindrical portion 9 has an annular groove 9c in which the groove 9c is intermittent in the axial direction. And the bonding strength with the metal can be improved.

That is, in the first embodiment, while the projection 21 is fitted in the annular groove 9c, the divided body 19 constituting the connecting ring 18 is exteriorly provided on the ends 7a and 7b of the hose body 7, In this state, the connecting ring 18 is fitted into and bonded to the connecting tubular portion 12 so as to compress the sealing material 27, and the connecting ring 18 is inserted into the annular groove 9c by the ridge 21.
Are fitted to each other, and the hose body ends 7a and 7b are locked, and are bonded to the connecting tubular portion 12 of the pipe joint 11. The inner peripheral surface 15a of the coupling cylindrical portion 12 has a tapered shape that narrows the inner peripheral surface toward the insertion direction, and the outer peripheral surface 20a of the coupling ring 18 has a tapered surface 20 corresponding to the tapered inner peripheral surface.
Since it is set to a, the connection ring 18 is firmly joined to the pipe joint 11.

Therefore, in the flexible drainage pipe H1 of the first embodiment, the outer cylindrical portion 9 of the hose body 7 has the concave groove 9c.
The joint 11 and the hose body ends 7a and 7b can be improved in joint strength by forming a corrugated bellows having a corrugated axial section so that the annular groove 9c is discontinuous in the axial direction.
Can be joined.

Further, in the drain pipe H1 of the first embodiment,
A second seal member 28 is provided between the ridge 21 of the connection ring 18 and the annular groove 9c of the hose body 7 to which the ridge 21 is fitted, and the inner peripheral surface 20b side of the connection ring 18 is The second sealing material 28 ensures the sealing performance with respect to the hose body 7. The outer peripheral surface (tapered surface) 20a side of the connecting ring 21 is adhered to the inner peripheral surface 15a of the coupling tubular portion 12 of the pipe joint 11, so that a sealing property is secured between the coupling ring 12 and the coupling tubular portion 12. As a result, the inner and outer peripheral surfaces 20a and 20b of the connecting ring 18 are also connected with the first sealing material 27 provided between the hose body ends 7a and 7b and the pipe joint 11, and End 7a ・ 7
Since the sealability is secured with respect to the pipe joint 11 and the pipe joint 11, further sealability between the hose body ends 7 a and 7 b and the pipe joint 11 can be ensured.

It should be noted that the side surfaces 19 of the divided bodies 19 contacting each other.
When the connecting ring 18 is inserted into the cutout recess 15, the a.
There is no risk of water leakage. In particular, in the case of the embodiment,
The side surface 19a of each divided body 19 has a tapered surface that reduces the thickness toward the tip, and is easily deformed when inserted into the cutout recess 15, and is tightly attached so as to enhance the sealing property, so that water leakage is effectively prevented. Can be prevented.

As shown in FIG. 6, the split body 19 has a fitting pin 19b protruding from one of the side surfaces 19a to be brought into contact, and a fitting hole 1 into which the fitting pin 19b can be fitted.
9c may be provided so that the divided bodies 19 can be connected to each other by fitting the fitting pin 19b into the fitting hole 19c. In this case, when the connecting ring 18 is provided on the outer peripheral surfaces of the hose body ends 7a and 7b, the fitting pins 19b are fitted into the fitting holes 19c, so that the hose body ends 7a and 7b are fitted.
7b can hold the connection ring 18,
Release the hands from each of the divided bodies 19 and remove the hose body 7 and the pipe joint 1.
1 can be joined.

In the case of such a configuration, the connecting ring 18 may be formed of a divided body divided into three or more, instead of the divided body 19 divided into two.

Of course, as the locking means for connecting the divided body 19 composed of the fitting pin 19b and the fitting hole 19c, locking hooks 89b and 90b of the connecting ring 81 of the fourth embodiment described later are used. It may be provided at a corresponding portion of the divided body 19.

Further, the side surfaces 19a of the divided bodies 19
In the case where the sealing property between them decreases, the second sealing material 28 may be formed by using a caulking agent instead of the second sealing material made of rubber packing.

Further, in the drain pipe H1 of the first embodiment,
As the outer cylindrical portion 9 of the hose body 7, a bellows-like one having a corrugated axial section has been illustrated as an annular concave groove 9c in which the concave groove 9c is intermittent in the axial direction. Like the flexible drain pipe H2 of the second embodiment, the outer cylindrical portion 39 of the hose body 37 may be formed with a spiral concave groove 42. The drain pipe H2 is connected to a hose body 37 and a pipe joint 5 joined to both ends 37a and 37b of the hose body 37.
1, a connection ring 61 disposed between the hose body 37 and the pipe joint 51, and a seal member 66.

The hose body 37 is made of soft polyethylene and has an inner cylindrical portion 38 having a smooth inner peripheral surface, and is fixed to the outer peripheral surface of the inner cylindrical portion 38 while maintaining the flexibility of the inner cylindrical portion 38. And a bellows-shaped outer cylinder portion 39 made of hard polyethylene for imparting radial rigidity to the inner cylinder portion 38.

The outer cylinder portion 39 is formed by bonding a band-shaped outer cylinder portion forming material made of hard polyethylene to the outer peripheral surface of the inner cylinder portion 38 in a spiral shape. The outer cylindrical portion 39 is provided so as to cover and protect the surface of the inner cylindrical portion 38 without impairing the flexibility of the inner cylindrical portion 38.
And a cover portion 41 extending from the fixed portion 40. The shape of the cover portion 41 extending from the fixing portion 40 is formed so as to cover the adjacent fixing portion 40 or the cover portion 41 with a space therebetween.

And, in the case of the embodiment,
A bottom portion 40a formed in a U-shaped cross section and adhered to the outer peripheral surface of the inner cylindrical portion 38 by using an adhesive 43, and a claw portion 40b rising from one end of the bottom portion 40a along the axial direction of the inner cylindrical portion 38; And a connecting portion 40c that rises from the other end of the bottom portion 40a and is connected to the cover portion 41.

In the case of the embodiment, the cover 41 has a section L
A ceiling portion 41a extending from the connecting portion 40c and covering a part of the adjacent fixing portion 40; and a ceiling portion 41a extending from the tip of the ceiling portion 41a toward the center of the inner cylindrical portion 38.
And a claw portion 41b extending with a space between the claw portion 40b and the connecting portion 40c. Note that the tip of the claw portion 41b is not bonded to the adjacent fixing portion 40. In the case of the embodiment, a spiral groove 42 is formed on the outer peripheral surface of the hose body 37 due to the shapes of the fixing portion 40 and the cover portion 41.

In the manufacture of the hose body 37, a strip-shaped material for forming an outer cylinder portion is prepared, and the bottom portion 40a of the fixing portion 40 to which the adhesive 43 is applied is spirally formed on the outer peripheral surface of the inner cylinder portion 38. If the outer cylinder 39 is formed by being wound and adhered, it can be easily manufactured.

The pipe joint 51 is made of a hard synthetic resin such as hard vinyl chloride and the like.
And a cylindrical connection tube portion 58 formed on the other end side. The coupling cylinder 52 is connected to the ends 37 a and 37 b of the hose body 37 and has a cylindrical nipple 53.
And a sleeve portion 54. The nipple portion 53 is for externally fitting the ends 37a and 37b of the hose body 37. The sleeve portion 54 includes the nipple portion 53
Is formed so as to extend from the base side of the nipple portion 53 to the tip side of the nipple portion 53 so as to provide an annular concave portion 55 that opens in the front side of the nipple portion 53. The connection cylinder portion 58 is connected to a predetermined connection port (in the second embodiment, the nipple portion 32 and the drain pipe 34 of the wastewater mass 1), and in the case of the embodiment, is formed in a socket shape. The inner peripheral surface 59 of the pipe joint 51 is connected to the connection port 32.3 at the time of connection.
4 to the hose body ends 37a and 37b so as to be smoothly continuous. In the case of the embodiment, the inner peripheral surface 59 is arranged in order from the connection cylindrical portion 58 side.
Surface 59a corresponding to the wall thickness of the drain pipe 34, a tapered surface 59b whose diameter is gradually reduced from the step surface 59a, a flat surface 59c, and a flat surface 59c so as to correspond to the inner diameter of the hose body 37 from the flat surface 59c. And a tapered surface 59d whose diameter increases.

The connecting ring 61 is used for joining the hose body 37 and the pipe joint 51. The connecting ring 61 is made of a hard synthetic resin such as hard vinyl chloride and is provided on the inner peripheral surface 62a of the cylindrical body 62. 37 is provided with a spiral ridge 63 which can be screwed into the concave groove 42 on the side of the end portions 37a and 37b,
Further, the outer peripheral surface 62b side of the main body 62 is configured as a smooth straight surface having an outer diameter capable of contacting the inner peripheral surface of the sleeve portion 54 of the pipe joint 51. Further, in the case of the embodiment, a rib 64 is formed at an end of the outer peripheral surface 62b of the main body, the rib 64 being capable of contacting the distal end surface of the sleeve portion 54 of the pipe joint 51,
In addition, the protrusion 63 provided on the inner peripheral surface 62a of the main body corresponds to one round.

The protruding ridge 63 may have a cylindrical shape in which the connecting ring 61 has a helical protruding ridge on the inner peripheral surface. In this case, the length is set to substantially one round so that the molding can be performed without performing. Therefore, considering the locking force of the hose body 37 of the connecting ring 61, it is desirable that the protruding ridge 63 be formed long, and considering the formability, the protruding ridge 63 is preferably short. Therefore, it is desirable that the ridge 63 is strictly less than one round in the vicinity of one round. By the way, if this point is not taken into consideration, that is, if molding may be performed using a core or the like, the ridge 63 may be provided on the inner peripheral surface of the connecting ring 61.
You may provide more than a circumference.

The sealing material 66 is formed in the annular recess 5 of the pipe joint 51.
5 for ensuring watertightness in the annular concave portion 55 at the time of joining the ends 37 a and 37 b of the hose body 37 and the pipe joint 51. As the sealing material 66, like the first sealing material 27 of the first embodiment, besides the putty shape and the sponge shape, a liquid material can be used, which absorbs moisture and expands about 3 to 5 times. Use things. In the case of the embodiment, a sponge-like round bar-shaped material having an outer diameter corresponding to the cross-sectional shape of the annular concave portion 55 is used, and the material is applied to the entire circumference of the pipe joint 51 in the annular concave portion 55 in the circumferential direction. It is compressed and cut to a length that can be arranged, and is pushed into the annular concave portion 55 to be arranged.

The connection operation according to the second embodiment will be described. A seal member 66 is fitted in the annular concave portion 55 in advance. Also, the nipple portion 53 of the coupling cylinder portion 52
The adhesive C is applied to the outer peripheral surface of the sleeve and the inner peripheral surface of the sleeve portion 54 in advance. Then, the connecting ring 61 is threadedly engaged with the end 37a of the hose body 37 so that the end faces thereof coincide with each other. In this state, the rib 64 is brought into contact with the distal end face of the sleeve portion 54 while compressing the sealing material 66. The end 37a of the hose body 37 is externally fitted to the nipple 53, and the connecting ring 61 is inserted into the sleeve 54 so that the hose body end 37a is externally fitted to the nipple 53 and adhered. If the outer peripheral surface 62b of the connecting ring is inserted into and adhered to the sleeve portion 54, the hose body 37 on the end portion 37a side is formed.
The joining operation between the and the pipe joint 51 can be terminated.

Similarly, on the other end 37b side of the hose body 37, the pipe joint 5
After that, the drain pipe 34 is fitted into the connection tube portion 58 of the pipe joint 51 on the hose body end portion 37a side, and the connection tube portion 58 of the pipe joint 51 on the hose body end portion 37b side.
Is fitted to the nipple portion 32 of the sewage cell 1 and then covered with soil, whereby the work of laying the drain pipe 34 and the like can be completed.

Then, also in the drain pipe H2 of the second embodiment,
Since the inner cylinder portion 38 of the hose body 37 is formed of a plasticizer-less type soft polyethylene, even if the hose is buried in the soil for a long time, deterioration due to migration of the plasticizer and the like is suppressed, and durability is improved. Can be improved.

Further, since the inner cylindrical portion 38 and the outer cylindrical portion 39 are formed of the same material, the inner cylindrical portion 38 and the outer cylindrical portion 39 can be easily fixed using the adhesive 43. Can,
The hose body 37 can be easily manufactured.

Of course, since the hose main body 37 has the predetermined outer cylindrical portion 39 made of hard polyethylene fixed around the inner cylindrical portion 38 made of soft polyethylene, the drain pipe H2 has strength and flexibility. Can be secured. Further, the hose body 37 smoothes the inner peripheral surface of the inner cylindrical portion 38, and the pipe joint 51 is connected to the hose body ends 37a, 3 through the connection ports 32, 34 at the time of connection.
Since the inner peripheral surface up to 7b is configured to be smoothly continuous, the drain pipe H2 can ensure smooth drainage. Further, the pipe joint 51 and the hose body end portions 37a and 37b are utilized by using a predetermined connection ring 61 and a sealing material 66.
And good sealing performance between the pipe joint 51 and the hose body ends 37a and 37b can also be ensured.

Accordingly, the flexible drainage pipe H2 of the second embodiment also has strength, flexibility, smooth drainage, and
A good seal between the hose body 37 and the pipe joint 51 is provided, and the durability can be improved.

Next, a flexible drain pipe H3 according to a third embodiment will be described. This drain pipe H3 is also shown in FIGS.
As shown in the figure, a hose body 7, a pipe joint 11A joined to both ends 7a and 7b of the hose body 7, and a hose body 7
Ring 18A arranged between the pipe joint 11A
And first and second seal materials 27 and 28.

Here, the hose body 7 constituting the drain pipe H3 and the first and second seal members 27 and 28 are the first and second seal members 27 and 28, respectively.
Since the same drainage pipe H1 of the embodiment was used,
The same reference numerals are given to the embodiment, and the description is omitted. Further, the pipe joint 11A according to the third embodiment is different from the pipe joint 11 according to the first embodiment in that a flange portion 17 is projected from the outer peripheral surface. Further, the connection ring 18A according to the third embodiment is characterized in that (a) a locking portion 23 is provided on a rib 22 and (b) a single ring-shaped material having a slit 25 is used. However, this is different from the connection ring 18 according to the first embodiment. In the description of the pipe joint 11A according to the third embodiment and the connection ring 18A, the first
The same reference numerals as in the first embodiment denote the same parts as in the first embodiment, and a description thereof will be omitted.

The flange portion 17 of the pipe joint 11A constitutes a specific example of the locked portion. The flange portion 17 extends radially from the outer peripheral surface of the opening side end of the coupling cylindrical portion 12 in the radial direction of the coupling cylindrical portion 12. It protrudes outward.

As shown in FIG. 12, the connecting ring 18A is constituted by a single substantially ring-shaped object which is divided in the circumferential direction by a slit 25 penetrating the inner and outer circumferences thereof. The diameter can be expanded (expandable). In the third embodiment, in order to facilitate the manufacturing operation of the connecting ring 18A, the slit 25 is used.
Are provided along the radial direction of the main body 20, but the manner of forming the slit 25 is not limited to this. For example, the slit 25 may be provided in a direction intersecting with the radial direction of the main body 20, and the opposing surface of the connecting ring 18A opposing the slit 25 may be a tapered surface that is reduced in thickness toward the tip.

Further, the locking portion 23 of the connecting ring 18A is
The ribs 22 are provided on the surface on the distal end side of the connection ring 18A, and project from four locations at substantially equal intervals along the circumferential direction of this surface. Each locking portion 23 has a substantially hook-shaped claw portion 2.
3, each of the claws 23 is protruded toward the distal end of the connecting ring 18A (in the direction of insertion into the coupling cylinder 12), and its protruding end is bent inward in the radial direction of the connecting ring 18A. . The number of the locking portions 23 and the locked portions 17 is not particularly limited as long as the number of mutual engagement portions is two or more.
Is not limited to the third embodiment. For example,
On the surface of the rib 22 on the distal end side of the connection ring 18A, two engaging portions 23 may be protruded at radially opposed positions of the connection ring 18A. On the surface of the rib 22 on the distal end side of the connection ring 18A, What is necessary is just to arrange | position the several locking part 23 substantially radially from the center of the connection ring part 18A. In the third embodiment, the connecting ring 18A is provided with the locking portion 23, and the pipe joint 11A is provided with the flange portion 1 as a locked portion.
In the illustrated embodiment, the coupling ring 18A is provided with a locking portion such as the flange portion 17 and the pipe joint 11A is provided with the claw portion 2.
A locked portion such as 3 may be provided.

The connection operation of the third embodiment will be described. First, as shown in FIG. 11, the first seal member 27 is fitted into the annular groove 9c of the hose body 7 near the end face, and the connection ring 18A The second sealing member 28 is fitted in the annular groove 9c of the hose body 7 into which the ridge 21 is fitted. In addition, the adhesive C is applied to the inner peripheral surface 15a of the cutout recess 15 in the coupling cylinder portion 12 in advance.

Then, while expanding the slit 25 so as to widen it and moving the connecting ring 18A to the hose body end 7a while moving it in the axial direction of the hose body 7 from the end face side of the hose body end 7a, Let go. At this time, connecting ring 1
8A is restored by its elasticity, and the protrusion 21 is fitted into the predetermined annular concave groove 9c, so that the exterior work of the connecting ring 18A can be completed.

Then, in this state, the hose body end 7a is connected together with the connecting ring 18A, and the rib 22 is connected to the connecting cylindrical portion 12a.
Until the end surface of the joint comes into contact with the end face of
Insert into. At this time, the claw portion 23 as each locking portion
Over the flange portion 17 and is resiliently locked to the surface of the flange portion 17 on the connection tube portion 16F side, so that the connecting ring 18A is connected to the pipe joint 11A together with the hose body end portion 7a.
The connection work of the hose body 7 on the end portion 7a side and the pipe joint 11AF can be terminated.

Similarly, the other end 7 of the hose body 7
On the b side, the pipe joint 11AM is joined by the same operation, and thereafter, the pipe joint 1 on the hose body end 7a side is connected.
The drain pipe 4 is fitted into the connection cylinder 16F of the 1AF, and the connection cylinder 16M of the pipe joint 11AM on the hose body end 7b side.
Is fitted to the nipple portion 2 of the sewage mass 1 and then covered with soil, whereby the work of laying the drain pipe 4 and the like can be completed.

The drain pipe H3 of the third embodiment buried in this way has the following effects in addition to the effects described in the first embodiment. That is, the connecting ring 18A is
The end portions 7a and 7b of the hose body 7 are restored while restoring the connection ring 18A.
When the outer ring is provided, the end 7a of the hose body 7 is wrapped around the end 7a, 7b of the hose body 7,
7b does not fall. Therefore, the subsequent operation of inserting the connecting ring 18A into the connecting cylinder portion 12 becomes easy.
That is, since the connecting ring 18A is formed of a single member and the number of components is reduced, the exterior work of the connecting ring 18A, and eventually the flexible drain pipe H3
The efficiency of construction work on site can be improved.

Further, according to the drainage pipe H3 of the third embodiment, the plurality of locking portions 23 of the connecting ring 18A are
A is locked to the locked portion (flange portion 17) of
A can be prevented from falling off the pipe joint 11A. That is, until the bonding between the outer peripheral surface of the connection ring 18A and the inner peripheral surface of the pipe joint 11A is completed, the connection ring 18A
Is securely held to the pipe joint 11A. for that reason,
The hands may be released until the bonding is completed, and the workability for this bonding is improved, and the positional accuracy of this bonding can be ensured. Furthermore, in the third embodiment, a plurality of locking portions 2
Since 3 are provided at equal intervals, the connecting ring 18A can be held in good balance with the pipe joint 11A, and the bonding strength can be stabilized.

Note that such a locking portion 23 is connected to the pipe joint 1.
If a locked portion corresponding to 1 is provided, it may be provided on the connecting ring 18 composed of the divided body 19 of the first embodiment.

Also in the third embodiment, when the sealing performance of the connecting ring 18A is reduced in the slit 25, the caulking agent is used instead of the second sealing material made of rubber packing. The sealing material 28 may be used.

Next, a flexible drain pipe H4 according to a fourth embodiment will be described. This drain pipe H4 is shown in FIG.
As shown in FIG. 4, the hose body 7, a pipe joint 71 joined to both ends 7 a and 7 b of the hose body 7,
98 and a connecting ring 81.

The hose body 7 constituting this drain pipe H4
Is the same as the hose body 7 of the first embodiment except that the cross-sectional shape of the protruding portion 9a of the outer cylindrical portion 9 is substantially semicircular, so the same reference numerals as in the first embodiment are used. And description thereof is omitted.

The pipe joint 71 (7
1F · 71M) is made of a hard synthetic resin such as hard vinyl chloride, and is joined to the ends 7a and 7b of the hose body 7 and has predetermined connection ports (the nipple portion 2 of the wastewater mass 1 and the drain pipe 4).
-It is configured to be connectable to 4. And the pipe joint 71
One end of the hose body ends 7a and 7b
A coupling cylinder portion 72 is formed, and a connection cylinder portion 78 (78F / 78M) is formed on the other end side to be connected to the connection ports 2.4.

The connecting cylinder 72 is provided with a substantially cylindrical nipple 7.
3 and a sleeve portion 74. The nipple portion 73 fits the ends 7a and 7b of the hose body 7 to the outside. The tip end of the nipple portion 73 is opened between the sleeve portion 74 and the hose body ends 7a and 7b. Sleeve portion 74 so as to provide a
Is formed so as to extend from the base portion side to the tip end side of the sleeve portion 74. The sleeve portion 74 of the embodiment has an inner diameter set slightly larger than the outer dimensions of the outer tube projecting portions 9a of the hose body ends 7a and 7b, and extends cylindrically from the connection tube 78 to form a nipple portion. It protrudes to the tip side from 73. On the outer periphery of the distal end of the sleeve portion 74, a ridge 76 as a fitted portion to be fitted to a fitting portion 87 described later of the connection ring 81 is formed over the entire circumference.

The connecting cylinder 78 includes a female-type connecting cylinder 78F externally connected to the drain pipe 4 and a male-type connecting cylinder 78M fitted and connected to the connection recess 2a of the nipple 2.
And, two kinds of are prepared. In addition, corresponding to the other party to be connected, both ends 7a and 7b of the hose body 7
For example, a pipe joint 71F provided with the same type of female connection tube portion 78F may be joined.

The inner peripheral surface 79 of the pipe joint 71 is
It is configured so as to smoothly continue from the connection ports 2.4 at the time of connection to the hose body ends 7a and 7b. In the case of the embodiment, the inner peripheral surface 79 is the stepped surface 7 corresponding to the wall thickness of the drainage pipe 4 in the pipe joint 71F in order from the connection cylindrical portion 78 side.
9a, a tapered surface 79b whose diameter is gradually reduced from the step surface 79a, and a tapered surface 79c whose diameter is sequentially expanded from the tapered surface 79b so as to correspond to the inner diameter of the hose body 7. Further, on the inner peripheral surface 79 of the pipe joint 71M, a flat surface 79a corresponding to the inner diameter of the nipple portion 2, a tapered surface 79b whose diameter is gradually reduced from the flat surface 79a, and an inner diameter of the hose body 7 from the tapered surface 79b. And a tapered surface 79c whose diameter is sequentially increased so as to correspond to. The tapered surfaces 79b and 79c are formed on the inner peripheral surface of the nipple portion 73.

The connecting ring 81 is made of, for example, soft polyethylene or thermoplastic elastomer.
As shown in FIGS. 14 and 15, the slit 82 penetrating the inner and outer circumferences
It is formed into a single, substantially cylindrical shape that is divided in the circumferential direction. A thin portion 82 is formed substantially parallel to the axis at a position facing the slit 82 with the axis of the connecting ring 81 interposed therebetween. Then, as shown in FIG.
The diameter can be easily expanded (expanded) so as to widen the slit 82 with the thin portion 83 as a fulcrum.

The connecting ring 81 is similar to that shown in FIG.
As shown in FIG. 5, at a substantially intermediate position along the axial direction,
The outer diameter and the inner diameter are changed in a step-like manner, and the small-diameter side portion constitutes a hose exterior portion 84 which is exteriorly provided on the hose body ends 7a and 7b, and the large-diameter side portion corresponds to the coupling cylindrical portion 72. The joint exterior part 86 is provided on the opening side.

On the inner peripheral surface of the hose exterior part 84, FIG.
As shown in FIG. 14, the ridge 8 fitted into the annular groove 9c of the hose body ends 7a and 7b over substantially the entire circumference in the circumferential direction.
5 are protrudingly provided. On the inner peripheral surface on the opening side of the joint exterior part 86, a concave groove 87 is provided so as to protrude over the entire circumference in the circumferential direction. This concave groove 87 is
A fitting portion for externally fitting to the ridge 76 as a fitted portion of the coupling cylindrical portion 72 to regulate the movement of the connecting ring 81 in the axial direction is formed.

Further, as shown in FIG. 15, a locking means 88 for restricting the diameter of the connecting ring 81 from increasing when the slit 82 is closed is provided at a portion of the connecting ring 81 facing the slit 82 therebetween. The locking pieces 89 and 90 that constitute
Is formed. When the slit 82 is closed, the locking pieces 89 and 90 have plate-like portions 89a and 90a that overlap with each other.
, A locking hook 89b, and a locking piece 90b. Each of the plate-like portions 89a and 90a
Are formed so as to protrude outward in the radial direction, and are formed over the entire length of the connecting ring 81 in the axial direction.

The locking hook 89b projects from the tip of the plate-like portion 89a on the hose exterior portion 84 side in a substantially C-shaped cross section. The locking section 90b extends radially outward of the connecting ring 81 from the distal end of the plate-like portion 90a on the hose exterior portion 84 side. The locking hook 89b is configured to be able to lock the tip 90c of the locking piece 90b by elastically flexing. Tip 9
0c projects the locking surface side away from the plate portion 89a in a direction away from the plate portion 89a so that the locked hook portion 89b after locking is hard to come off from the locking piece portion 90b. The tip 89c of the portion 89b corresponds to the protruding shape,
It is configured.

Further, in the connecting ring 81 of the embodiment, when the locking hook 89b is locked to the locking piece 90b, the diameter of the connecting ring 81, which widens the slit 82, can be further prevented. , A plate-like portion 89a on the hose exterior portion 84 side
-90a will be mutually connected by the screw (for example, tapping screw) 92.

The seal member 97 is made of water-swelling rubber, and is formed in an annular groove 9 near the end surfaces of the hose body ends 7a and 7b.
c, and is pressed against the entire outer circumferential surface of the hose body ends 7a and 7b and the inner circumferential surface of the sleeve portion 74 of the pipe joint connecting tube portion 72 in a circumferential direction to ensure watertightness. Things. As the sealing material 97, similarly to the first sealing material 27 of the first embodiment, in addition to a putty shape or a sponge shape, a liquid material can be used, which absorbs moisture and expands about 3 to 5 times. Use what you want. Also in the case of the fourth embodiment, a sponge-like and round rod-shaped material having an outer diameter corresponding to the cross-sectional shape of the annular groove 9c is used, and the material is used as a whole in the circumferential direction of the annular groove 9c. The circumference is cut to a length that can be arranged by being compressed, and is pushed into the annular groove 9c to be arranged.

The seal member 98A is formed of an annular rubber packing such as silicone rubber, and is provided with a hose body end 7a.
In the annular groove 9c of 7b, the seal member 97 is arranged in another annular groove 9c adjacent to the annular groove 9c in which the seal member 97 is arranged. The seal member 98B is made of a caulking agent, and has an inner peripheral surface of the annular concave portion 75 and the hose body end portion 7a.
The space between the end face 7b is filled. Similarly to the seal member 97, these seal members 98A and 98B are also connected to the outer peripheral surfaces of the hose body ends 7a and 7b and the connecting cylindrical portion 72.
The purpose is to ensure watertightness between them.

Next, the connection operation of the fourth embodiment will be described. At the hose body ends 7a and 7b, the seal member 97 is fitted into the annular concave groove 9c of the hose body 7 near the end face. The seal member 98A is fitted in another annular groove 9c adjacent to the annular groove 9c. In the pipe joint 71, a predetermined amount of a caulking agent as the sealing material 98B is filled in the bottom surface 75a of the annular concave portion 75.

Then, the hose body end 7a is connected to the connecting cylinder 7
2 into the annular recess 75. This insertion is performed until the end surface of the hose body end portion 7a comes into contact with the bottom surface 75a with the caulking agent 98B interposed therebetween.

Further, as shown in FIG. 16, while expanding the diameter of the connecting ring 81 so that the slit 82 becomes wider,
The hose body end 7a and the distal end of the connecting cylinder 72 of the pipe joint 71 are provided as an exterior. That is, the hose exterior portion 84 is exteriorized to a portion of the hose body end portion 7a having a predetermined width exposed from the coupling cylinder portion 72, and the joint exterior portion 86 is attached to the coupling cylinder portion 72.
To the outside end of the opening.

At the same time, the plate-like portions 89a, 90a of the locking pieces 89, 90 are so closed as to completely close the slit 82.
Are overlapped with each other, and the locking hook 89b of the locking piece 89 as the locking means 88 is locked with the locking piece 90 of the locking piece 90.
b.

At this time, the protrusion 85 is fitted into the annular groove 9c of the hose body 7, the groove 87 is fitted over the protrusion 76, and the connecting ring 81 is connected to the hose body 7 and the pipe joint. 71F
The movement of the connecting ring 81 along the axial direction is restricted, and as a result, the relative movement between the hose body 7 and the pipe joint 71F is restricted.
F can be bonded.

Further, in the embodiment, the locking piece 8
The connection work between the hose body 7 and the pipe joint 71F can be completed by connecting the overlapped plate-like portions 89a and 90a in 9.90 by tightening the screws 92.

The other end 7b of the hose body 7 is joined to the pipe joint 71M in the same manner as described above, and then the pipe joint 71M on the hose body end 7a side.
F, the drain pipe 4 is fitted into the connection pipe part 78F, and the connection pipe part 78M of the pipe joint 71M on the hose body end 7b side is fitted into the nipple part 2 of the sewage mass 1, and then the drain pipe 4 is covered with soil. Etc. can be completed.

In the drain pipe H4 of the fourth embodiment buried in this way, in addition to the same effects as in the first and third embodiments, the end of the hose body 7 and the pipe joint 71 is connected to the connecting ring 81 which is externally provided. Since the relative movement of the hose body 7 and the pipe joint 71 along the axial direction of the hose body 7 is regulated by using the ridge 85 and the fitting portion 87, the pipe joint can be used without using an adhesive. 71 and the hose body ends 7a and 7b can be joined. As a result, the bonding process and the like can be omitted, and the joining work between the hose body end and the pipe joint, and furthermore, the construction work of the drainage pipe on site Can also be made more efficient.

Further, in the case of the embodiment, a screw 92 is used in combination with the diameter regulation of the connecting ring 81 after the exterior.
The connecting ring 81 after the outer ends of the hose body 7 and the pipe joint 71 have been fitted to each other, is further provided with the annular groove 9 c of the ridge 85.
The diameter of the pipe joint 71 and the hose body ends 7a and 7b are tightly controlled so that the diameter of the pipe joint 71 and the hose body ends 7a and 7b are strongly restricted so as to cause the fitting part 87 to come off and the fitting part 87 to come off the fitting part 76. Can be further improved.

Also, since it is not necessary to use an adhesive for joining the hose body ends 7a and 7b and the pipe joint 71,
The hose body ends 7a and 7b and the pipe joint 71 do not have to be formed of materials that can be bonded to each other, and the drain pipe H4
(The hose body 7, the pipe joint 71, etc.) can be selected more freely.

In the fourth embodiment, the connecting ring 81
Although the screw 92 stop is used in combination in order to perform the diameter expansion control firmly, the screw stop may be omitted if the fastening of the locking means 88 is strong. Instead of the screw, a separate clamp may be used to couple the two plate-like portions 89a, 90a inseparably.

Further, the locking means is not limited to the above embodiment, and a fitting portion is provided on one of the surfaces of both plate-like portions 89a and 90a facing each other, and a fitting hole is formed on the other. May be formed, and the fitting portion may be fitted into the fitting hole to constitute a locking means for restricting the diameter of the connecting ring 81 from expanding.

Further, in the fourth embodiment, the configuration in which the locking means 88 for regulating the diameter expansion is formed so as to protrude outward in the radial direction of the connecting ring 81 is exemplified. Provided in the circumferential direction, the plate-like portions 89a, 90a
When they overlap each other, locking hooks 89b and 90b corresponding to the plate-like portions 89a and 90a may be provided so as to be inseparable from each other in the circumferential direction of the connecting ring 81.

Further, a locking means may be provided on the opposing surface of the connecting ring 81 with the slit 82 therebetween. In this case, as in the case of the above-described divided body 19 shown in FIG. 6, a mode in which a fitting pin protrudes from one of both end faces and a fitting hole is provided in the other can be exemplified.

Furthermore, in the embodiment, the connection ring 8
Although the groove 87 is illustrated as the fitting part in 1, when the fitting part of the pipe joint 71 is formed by a groove, the fitting part is formed by a ridge that can be fitted into the groove. May be.

In the fourth embodiment, the mode in which the hose body ends 7a and 7b and the pipe joint 71 are not bonded is described as an example. However, the hose body ends 7a
The joining between the 7b and the pipe joint 71 can be further strengthened.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a flexible drainage pipe according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a use mode of the embodiment.

FIG. 3 is an exploded sectional view of the same embodiment.

FIG. 4 is a cross-sectional view showing a joining operation of the embodiment.

FIG. 5 is a front view of a divided body used in the embodiment.

FIG. 6 is a front view showing a modified example of the divided body.

FIG. 7 is a cross-sectional view illustrating a flexible drainage pipe according to a second embodiment.

FIG. 8 is an exploded sectional view of the same embodiment.

FIG. 9 is a sectional view showing a flexible drainage pipe according to a third embodiment of the present invention.

FIG. 10 is a diagram showing a use mode of the embodiment.

FIG. 11 is an exploded sectional view of the same embodiment.

FIG. 12 is a front view of a connection ring used in the embodiment.

FIG. 13 is a sectional view showing a flexible drainage pipe according to a fourth embodiment of the present invention.

FIG. 14 is an exploded sectional view of the same embodiment.

FIG. 15 is a perspective view of a connection ring used in the embodiment.

FIG. 16 is a sectional view taken along the line XVI-XVI in FIG. 14;

FIG. 17 is a sectional view taken along the line XVII-XVII in FIG. 14;

[Explanation of symbols]

 2, 4, 32, 34: connection port, 7, 37: hose body, 7a, 7b, 37a, 37b: end, 8.38: inner cylinder, 9, 39: outer cylinder, 9c: annular groove 11, 11A, 51, 71: pipe joint, 12: connecting cylinder portion, 17: (locked portion) flange portion, 18: 18A, 61, 81: connecting ring, 19: split body, 21: 63, 85 ... projecting ridge, 23 ... (locking portion) claw portion, 25, 82 ... slit, 27, 97 ... sealing material, 27 ... first sealing material, 28 ... second sealing material, 76 ... (fitted portion) projection 84, hose exterior part, 86, joint exterior part, 87, (fitting part) concave groove, 88, locking means, 92, screw, H1, H2, H3, H4, flexible drain pipe.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2D061 AA02 AA03 AB10 AC01 AC05 AD01 BG04 2D063 BA02 BA22 BA26 BA27 3H017 CA05 CA08 3H111 AA02 BA15 CA03 CA43 CB03 CB14 CB27 CB28 DA14 DA26 DB05 DB17 EA15

Claims (6)

[Claims] 1. An inner cylindrical portion made of a soft synthetic resin having a smooth inner peripheral surface and fixed to an outer peripheral surface of the inner cylindrical portion, while maintaining flexibility of the inner cylindrical portion. A hose body having a bellows-shaped outer cylinder portion made of a hard synthetic resin that imparts radial rigidity to the inner cylinder portion; and a hose body joined to an end of the hose body and connectable to a predetermined connection port. And a pipe joint configured to smoothly continue the inner peripheral surface from the connection port to the end of the hose body at the time of connection, and a ridge provided on the inner peripheral surface is provided on the outer periphery of the outer cylindrical portion. A cylindrical connecting ring that joins the hose body end and the pipe joint by being fitted to the side groove and joined to the pipe joint; It is arranged between
A flexible drainage pipe comprising: a sealing material for ensuring watertightness; and wherein the inner cylindrical portion is formed of a plasticizer-less type soft synthetic resin material. . 2. The pipe joint according to claim 1, wherein the outer cylindrical portion of the hose body is formed in a bellows shape with a corrugated axial section so that the concave groove is an annular concave groove that is intermittent in the axial direction. A tapered cylinder that allows the end of the hose body with the connecting ring to be externally inserted into the inner peripheral side at the end side where the end of the hose body is joined, and narrows the inner peripheral surface toward the insertion direction. The connecting ring is configured to have an outer peripheral surface side as a tapered surface capable of being pressed against the inner peripheral surface of the coupling cylindrical portion of the pipe joint, and The end portion of the hose body is configured as a single body having a slit that penetrates the inner and outer peripheries so as to be able to be externally covered, or divided into a plurality in the circumferential direction, or is capable of expanding in diameter. A state in which the connection ring is fitted to the end of the hose body while being fitted. The coupling ring is fitted into the coupling cylinder so that the inner peripheral surface of the coupling cylinder of the pipe joint compresses the sealing material and the coupling ring, and the tapered surface of the coupling ring is coupled to the coupling ring. The flexible drainage pipe according to claim 1, wherein the end of the hose body and the pipe joint are joined by bonding an inner peripheral surface of a tubular part. 3. The connecting ring is provided with a plurality of locking portions in a substantially radial manner, and the locking portions are locked to locked portions provided on the pipe joint, so that the connection ring is fixed to the pipe joint. 3. The flexible drainage pipe according to claim 2, wherein the flexible drainage pipe is retained. 4. The method according to claim 2, wherein a second seal member is provided between the protrusion of the connection ring and the annular groove of the hose body. Flexible drainage pipe. 5. The connecting ring according to claim 1, wherein the outer cylindrical portion of the hose body is formed in a bellows shape having a corrugated axial section so that the outer peripheral groove is an annular concave groove that is intermittent in the axial direction. However, it is possible to cover the end of the hose body, a hose outer portion having the ridge on the inner peripheral surface, and to be able to cover the end of the pipe joint, with respect to the fitted part of the pipe joint, A joint exterior part having a fitting part to be fitted on the inner peripheral surface so as to regulate movement of the connection ring along the axial direction, and an exterior part at the end of the hose body and the pipe joint. A single unit having a slit that penetrates the inner and outer circumferences so as to be able to expand, further comprising locking means capable of restricting the expansion of the hose body and the pipe joint to the ends after the outer sheath. And while fitting the ridge into the annular groove while expanding the diameter of the connection ring, The fitting portion is fitted to the fitted portion, and the connecting ring is provided on both ends of the hose body and the pipe joint. The diameter of the connecting ring is restricted by the locking means. The flexible drain pipe according to claim 1, wherein the end of the hose body and the pipe joint are joined by doing. 6. The flexible drainage pipe according to claim 5, wherein the connecting ring restricts the diameter expansion by using a screw together.