JP3133254B2 - Plastic fittings for fume pipes - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic joint used for connecting a fume pipe, particularly a fume pipe called "A" type defined in JIS.

[0002]

The fume tube has a straight circular tube shape called "A" shape, and a circle provided with an enlarged joint portion called "B" shape at one end side. Some are tubular. In the construction of the B type, the pipes are connected to each other by inserting the end of the other pipe into the connection part of one pipe, and the connection work is relatively easy. However, since the diameter of the joint portion is larger than that of the general portion in the shape, the production of the fume tube is complicated, and there is a problem that the space occupied by the fume tube in storage and transfer is increased. In addition, since the A type has a straight circular pipe shape, the production, storage, and management are relatively easy. However, in connecting the pipes, a concrete collar is used, and the pipe and the collar are used. The work such as packing mortar is performed between them, and it takes time and effort to perform the work, and there is a problem that the joint is inflexible. A joint that can be used has been desired. In addition, in recent years, due to the manufacturing method of extruding and extruding a tube molded with a tapered formwork,
The outer diameters at both ends of the tube are different. For this reason, it is required that a joint which requires a water sealing function can cope with different outer diameters. In view of the above circumstances, it is an object of the present invention to connect an A-shaped fume pipe with a joint capable of coping with different outer diameters without causing water leakage, thereby simplifying the connection work of the fume pipe with ease. It is intended to be.

[0003]

The present invention has been made in consideration of the above problems.
Hume tube inserted at each end
It is a plastic cylinder that can beExpanded and stepped
Provided in a shapeBoth endsPart 8Cylindrical body with threaded section2
And the cylindrical body2Both ends ofPart 8Located on each inner circumference
Can be projected and deformed in the pipe axis direction and perpendicular to the pipe axis.
Water-sealing ring with effective elasticity3And the cylindrical body
2Both ends ofPart 8To the water sealing ring at the time of screwing.
The3The tubular body2Press on the ring for water sealing3The tube
Fixing that protrudes and deforms in the axial direction and perpendicular to the pipe axis.
Fixed ring4And the fixing ring4When tightening
Ning4And the ring for water sealing3Slippery located between
Sliding ring with5With, Said sliding ring 5,
A cylindrical book extending in the circumferential direction of the surface on the side of the water sealing ring 3.
A push wall 17 projecting in the longitudinal direction of the body 2;
The groove 18 provided on the sliding ring 5 side of the stop ring 3
The push wall 17 is insertedCharacterized by
By providing plastic fittings for fume pipes,
It will be resolved.Further, in the present invention, the cylinder
The inner surface of each of the enlarged diameter portions of both end portions 8 of the cylindrical body 2
The convex wall 10 protruding in the longitudinal direction of the cylindrical main body 2 is
And provided in the above-mentioned water sealing ring 3.
At least two over the circumference of the surface on the side of the convex wall 10
A ridge 14 is provided between the two ridges 14.
It is preferable that the convex wall 10 be sandwiched. Furthermore, on
Circumference on the surface of the fixing ring 4 on the sliding ring 5 side
Wall 1 protruding in the longitudinal direction of the cylindrical main body 2
9 is provided on the sliding ring 5 on the side of the fixed ring 4.
The convex wall 19 is inserted into a concave groove 20 provided on the surface.
It is good that it is. And in the present invention,
The tubular main body 2 is lightweight, rigid and flexible.
The water sealing ring 3 is formed from a thermoplastic resin material.
Is molded from a rubber material with excellent compressive strain resistance
It is preferable that the upper cylindrical body 2
The water sealing rings 3 located at both ends 8 of the
The fixing ring 4 has an opening shape into which the fume tube can be inserted.
It is good to have.

In the present invention, a fume tube (A type) is inserted into the end of the tubular main body, and then the fixing ring is tightened to the end of the tubular main body, so that the water sealing ring becomes an outer periphery of the fume tube. The fume tube and the joint itself are connected by the close contact, and the gap between the fume tube and the joint is eliminated to prevent water leakage.
Furthermore, smooth fastening can be performed by providing the sliding ring in consideration of frictional resistance between the water sealing ring and the fixing ring at the time of fastening. In addition, by forming the cylindrical main body from a lightweight, rigid and flexible thermoplastic resin material, and forming the water sealing ring from a rubber material having excellent compression distortion resistance characteristics, In the row where the fume pipes are connected, bending can be caused at the joint portion, and it becomes flexible in response to underground fluctuation such as land subsidence. Then, by forming the water sealing ring and the fixing ring into an opening shape into which the fume tube can be inserted, the fume tube is inserted into the end of the joint in which the water sealing ring and the fixing ring are arranged in advance. it can.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described in detail based on an embodiment shown in the drawings. FIG. 1 shows a plastic joint 1 of the present invention. As shown, the joint 1 has a cylindrical body 2 formed of a lightweight, rigid, and flexible thermoplastic resin material. , A water sealing ring 3 formed from a rubber material having excellent compression strain resistance characteristics
, A fixing ring 4 and a sliding ring 5. The cylindrical body 2 has a general portion 6 excluding both end portions having an inner diameter into which an A-shaped fume tube A can be inserted, and various types are prepared corresponding to the outer diameter of the fume tube A. Abutting ribs 7 are integrally formed over the center inner periphery of the cylindrical main body 2, and both ends 8 of the cylindrical main body 2 are each provided with a stepped shape with an enlarged diameter. At least one convex wall 10 protruding in the longitudinal direction of the cylindrical main body 2 is integrally provided on the inner surface of the inclined portion 9 from the general portion 6 over the circumferential direction. In addition, on the outer peripheral surface of each of the end portions 8,
As will be described later, an external screw 11 to which the fixing ring 4 is screwed is provided. Further, the fixing ring 4 is provided with a planar sliding portion 12 in consideration of the slidability with the water sealing ring 3.

The water sealing ring 3 has an opening 13 whose inner diameter is slightly larger than the outer diameter of the fume tube A,
As shown in the drawing, the fume tube A is arranged inside the end 8 so that the fume tube A can be inserted into the cylindrical main body 2 with the water sealing ring 3 positioned inside the end 8. ing. The ring 3 for water sealing has at least two protruding ridges 14 that come into contact with the convex wall 10 integrally in the circumferential direction of the outer peripheral surface that comes into contact with the inclined portion 9. The convex wall 10 and the convex ridge 14 need to be in a form such that one is inserted between the other. For example, when there is one convex wall 10 as shown in FIG. , ridges 14 Ru provided Article in the form sandwiching the convex wall 10. Since the water sealing ring 3 is made of a rubber material as described above and is disposed inside the end portion 8, the water sealing ring 3 is pressed in the longitudinal direction of the tubular main body 2 to generate fume. It can be projected and deformed so as to be in close contact with the pipe A and the inclined portion 9.

The fixing ring 4 is provided with an external thread 1 at the end 8.
1 and has an inner diameter of the opening 16 slightly larger than the outer diameter of the fume tube A, similarly to the water sealing ring 3. The fume tube A can be inserted into the tubular main body 2 in a state where the fume tube A is attached to the initial position before the fastening.
Further, in the fixing ring 4, a convex wall 19 projecting toward the longitudinal direction of the tubular main body 2 integrally with the sliding portion 12 in a circumferential direction thereof is provided. Correspondingly, it is inserted into a groove 20 provided in the sliding ring 5. By determining the position of the sliding ring 5 with respect to the fixing ring 4 in this manner, the fume tube A can be easily and accurately inserted. Further, in the sliding ring 5, a pushing wall 17 protruding in the longitudinal direction of the cylindrical main body 2 integrally with the surface of the sliding ring 5 in contact with the water sealing ring 3 in the circumferential direction is provided. It is inserted into a concave groove 18 provided in the water sealing ring 3 corresponding to the pushing wall 17. Since the convex wall 10 and the push wall 17 are inserted from the side opposite to the water sealing ring 3 as described above, when the fume tube A is not inserted, the fixing ring 4 and the sliding ring 5 are removed. By attaching the water sealing ring 3 to the cylindrical body 2, the water sealing ring 3
7 and does not fall off from the cylindrical main body 2. further,
The cylindrical body 2, the water sealing ring 3, the fixing ring 4, and the sliding ring 5 can be inserted into the fume tube A in an assembled state. In addition, after the insertion, in consideration of the frictional resistance acting on the contact portion between the sliding ring 5 and the water sealing ring 3 at the time of fastening, by providing the sliding portion 12, smooth fastening can be performed.

[0008] The connection of the fume tubes via the joint 1, ie
When connecting the fume tube A and the joint 1, the fume tube A
Can be inserted into the cylindrical main body 2 through the opening 16 of the fixing ring 4 and the fixing ring 4 can be screwed in the tightening direction.
Moves toward the butting rib 7 side of the cylindrical body 2 in the longitudinal direction, so that the water sealing ring 3 is pressed.
Then, the water sealing ring 3 is pressed in the longitudinal direction of the tubular main body 2 by the fastening of the fixing ring 4, so that the water sealing ring 3 is projected and deformed in the tube axis direction and in the direction perpendicular to the tube axis. The inner peripheral surface of the ring 3 is in close contact with the outer peripheral surface of the fume tube A, and water is discharged from between the outer peripheral surface of the fume tube A inserted into the cylindrical main body 2 and the inner peripheral surface of the cylindrical main body 2. The watertight condition is ensured so as not to leak into the water. As described above, the connection of the fume tube A is performed by tightening the fixing ring 4 on each end side of the joint, but when the fume tube A is removed, the fixing ring 4 is rotated in a loosening direction to remove water. The pressure on the ring 3 is released, the ring 3 for water sealing returns to the initial shape and separates from the outer peripheral surface of the fume tube A, and then the fume tube A may be withdrawn.

FIG. 2 shows another embodiment in which the convex wall of the fixing ring 4 and the concave groove of the sliding ring 5 are not provided in the above-described embodiment. Similarly, the water-sealing ring 3 is pressed in the longitudinal direction of the tubular main body 2 by the fastening of the fixing ring 4, so that the water-sealing ring 3 protrudes and deforms in the tube axis direction and in the direction perpendicular to the tube axis. The inner peripheral surface side of the stop ring 3 is tightly fitted around the outer peripheral surface of the fume tube A, and from between the outer peripheral surface of the fume tube A inserted into the tubular main body 2 and the inner peripheral surface of the tubular main body to the outside of the joint. A watertight state is ensured so that no water leakage occurs.

FIG. 3 shows another embodiment. Unlike the above-described embodiment, the inclined portion 9 is not provided with a convex wall. Also, a groove corresponding to the convex wall is not provided, and the end surface on the inclined portion side of the water sealing ring 3 is formed as an inclined surface corresponding to the inner surface of the inclined portion 9. By rotating and fixing the fixing ring 4, the water sealing ring 3 is fixed to the inner surface of the inclined portion 9 and the pressing wall 17.
Between the outer peripheral surface of the fume tube A and the inner surface of the tubular body 2 to the outside of the joint, as in the above embodiment. The watertight state is ensured so that the water does not occur.

FIG. 4 is different from the above-described embodiment in that the internal thread 15 of the tubular main body 2 is provided and the external thread 11 is provided in the fixing ring 4. The water-sealing ring 3 is tightly attached over the outer peripheral surface of the fume tube A, and a watertight state is ensured so that water does not leak from between the outer peripheral surface of the fume tube A and the inner surface of the tubular main body 2. I am trying to.

[0012]

As described in the foregoing, according to the Hume pipe Plastic fittings for the present invention, there is provided a plastic cylindrical body which can be inserted fume tube both ends, diameter
And a cylindrical body having a threaded portion at both ends provided in stepped shape, located at both ends each of the inner peripheral portion of the cylindrical body, projecting in a direction perpendicular to the tube axis and the tube axis and water sealing ring having a deformable resilient, screwed to the opposite ends of the cylindrical body, the water sealing ring and presses the water sealing ring to the tubular body during screwing A fixing ring for projecting and deforming in the pipe axis direction and in a direction perpendicular to the pipe axis;
A sliding ring having a sliding property positioned between the fixing ring and the water sealing ring when tightening the fixing ring , wherein the sliding ring has a surface on the water sealing ring side.
Pushing in the longitudinal direction of the cylindrical body over the circumferential direction of
A wall provided on a sliding ring side of the water sealing ring.
Since the pressing wall is inserted into the recessed groove , a fume tube is inserted into the fixing ring, the water sealing ring, and the tubular main body, and the fixing ring is tightened. The fume pipe and the joint can be connected by a simple operation, that is, the two fume pipes can be connected via this joint, and the connection work of the A-type fume pipe becomes very simple. The range of use will also be expanded. Furthermore, in order to make the water sealing ring elastically adhere to the outer peripheral surface of the fume tube, even if the outer diameter of the fume tube is slightly different, the error is absorbed by the deformation of the ring to prevent water leakage. It can be prevented from occurring. By forming the cylindrical main body from a lightweight, rigid and flexible thermoplastic resin material, and forming the water sealing ring from a rubber material having excellent compression strain resistance characteristics, In the row where the fume pipes are connected, bending at the joint portion is allowed, and even if the fume pipe descends due to land subsidence, the joint itself bends, and it is possible to more reliably prevent detachment of the fume pipe and occurrence of gaps Become like Further, by forming the water sealing ring and the fixing ring into an opening shape into which the fume tube can be inserted, the fume tube is inserted into a joint in which the water sealing ring and the fixing ring are arranged in advance. What should I do? Further, since a portion having a sliding property is provided even when the fixing ring is fastened, the fastening can be smoothly performed, and the connection work can be simplified, and the effect excellent in practicality can be obtained.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an embodiment of a plastic joint for a fume pipe according to the present invention in a partial cross section.

FIG. 2 is an explanatory diagram showing another embodiment.

FIG. 3 is an explanatory diagram showing another embodiment.

FIG. 4 is an explanatory view showing still another embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Plastic joint 2 ... Cylindrical main body 3 ... Water sealing ring 4 ... Fixing ring 5 ... Sliding ring 9 ... Inclined part 11 ...
Outer screw 12 ... Sliding part 15 ... Inner screw 17 ... Push wall 18 ... Concave groove A ... Fume tube

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Takefumi Matsumura 7-14-3 Ginza, Chuo-ku, Tokyo Inside the Fume Tube Association of Japan (56) References JP-A-7-332560 (JP, A) −39822 (JP, U) Jiko 45-19503 (JP, Y2) (58) Fields investigated (Int. Cl. ⁷ , DB name) F16L 21/08

Claims (5)

(57) [Claims] 1. A plastic tubular body at both ends can be inserted fume tube respectively, provided in the stepped shape and diameter
It was a cylindrical body 2 having a threaded portion at both ends 8, located in the inner peripheral portion of the respective end portions 8 of the cylindrical body 2,
A water sealing ring 3 having elasticity capable of protruding and deforming in a pipe axis direction and a direction perpendicular to the pipe axis; and being screwed to both end portions 8 of the tubular main body 2 , and for water sealing at the time of screwing. a fixing ring 4 to be protruded deformed in the vertical direction and the aqueous sealing ring 3 relative to the tube axis direction and the tube axis to press the ring 3 to the tubular body 2, and the fixing ring 4 during tightening of the fixing ring 4 and a sliding ring 5 having a sliding property positioned between the water sealing ring 3, the sliding ring 5, the circular surface of the water sealing ring 3 side
Push wall projecting in the longitudinal direction of the cylindrical body 2 over the circumferential direction
17 on the sliding ring 5 side of the water sealing ring 3
A plastic joint for fume pipes, characterized in that the pushing wall 17 is inserted into the provided groove 18 . 2. An enlarged diameter portion at both ends 8 of the cylindrical main body 2.
Projections projecting in the longitudinal direction of the cylindrical main body 2 are provided on the respective inner surfaces.
A wall 10 is provided along the circumferential direction of the cylindrical main body 2,
In the circumferential direction of the surface of the stop ring 3 on the side of the convex wall 10
At least two ridges 14 are provided over the two ridges.
2. The method according to claim 1, wherein the convex wall is sandwiched between the ridges.
The plastic fitting for fume pipe as described . 3. The fixing ring 4 has a sliding ring 5 side.
Over the circumferential direction of the surface, in the longitudinal direction of the cylindrical body 2
A protruding convex wall 19 is provided to secure the sliding ring 5.
The convex wall 1 is inserted into a concave groove 20 provided on the surface on the side of the fixed ring 4.
9. A fuel tank according to claim 1, wherein the fuel cell is inserted into the fuel cell.
Plastic fittings for tube . 4. The tubular main body 2 is lightweight and has rigidity.
Molded from a flexible thermoplastic resin material,
The stop ring 3 is made of a rubber material having excellent compression strain resistance.
The molded article according to any one of claims 1 to 3, which is molded from
Plastic fitting for fume pipe . 5. Positions at both ends 8 of said tubular main body 2
The water sealing ring 3 and the fixing ring 4 are
5. An opening according to claim 1, wherein said opening has a shape into which said tube can be inserted.
The plastic joint for fume pipes according to any one of the preceding claims .