JPH09273676A - Plastic fitting for fume pipe - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To connect a fume pipe of A type easily and surely by connecting a hume pipe with a joint capable of coping with a tolerance of its shape without causing water leakage. To do. SOLUTION: A water-sealing ring 3 having elasticity capable of projecting and deforming in a pipe axis direction and in a direction perpendicular to the pipe axis is positioned at both ends of a plastic cylindrical main body 2 into which a fume tube can be inserted. A fixing ring 4 having a sliding portion that presses the water sealing ring 3 against the tubular main body 2 during screwing to project and deform the water sealing ring 3 in the pipe axis direction and in the direction perpendicular to the pipe axis. Was screwed onto each end of the tubular body 2.

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 tube, in particular a fume tube referred to as A type defined in JIS.

[0002]

In the fume tube, a straight circular tube shape called A type and a circle called B type having a diameter-increased joint portion are previously provided at one end side. There are tube-shaped ones. In the B-shaped construction, the pipes are connected to each other by inserting the end of the other pipe into the connecting portion of one pipe, and the connecting work is relatively easy. However, since the diameter of the joint portion is larger than that of the general portion in its shape, there is a problem that the manufacturing of the fume tube becomes complicated and the space occupied by the fume tube during storage and transfer becomes large. In addition, since the shape A is a straight circular pipe shape, it is relatively easy to manufacture, store, and manage, but when connecting the pipes, a concrete collar is used, and the pipe and the collar are used. There is a problem that the work is troublesome and the flexibility of the joint is poor because the work such as filling the mortar between and is done, and the connection work is easy when connecting the A type. A joint that could be done was desired. In addition, in recent years, because it is a manufacturing method of extruding a pipe molded with a tapered frame,
The outer diameter of both ends of the pipe is different. Therefore, it is necessary for a joint that is required to have a water-sealing function to be able to cope with different outer diameter dimensions. Therefore, in view of the above circumstances, the present invention has an object to connect an A-type fume pipe with a joint that can cope with different outer diameter sizes without causing water leakage, and the fume pipe connecting work is simple and reliable. The purpose is to do.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and is a plastic tubular body into which a fume tube can be inserted at both ends, and a tubular body having screw portions at both ends. And a water-sealing ring which is located at the inner peripheral portion of each end of the tubular body and has elasticity capable of projecting and deforming in the pipe axis direction and in a direction perpendicular to the pipe axis, and both ends of the tubular body. A fixing ring that is screwed onto the pipe, presses the water sealing ring against the tubular body when screwing, and causes the water sealing ring to project and deform in the pipe axis direction and in a direction perpendicular to the pipe axis; To provide a plastic joint for a fume pipe, which is characterized in that it comprises a sliding ring having a sliding property and located between the fixed ring and the water sealing ring when tightening the ring, thereby solving the above problems. is there. Further, in the present invention, the tubular body is formed from a thermoplastic resin material that is lightweight and has rigidity and flexibility, and the water sealing ring is formed from a rubber material having excellent compression strain resistance characteristics. It is preferable that the water sealing ring and the fixing ring located at both ends of the tubular body have an opening shape into which a fume tube can be inserted. .

In the present invention, the water sealing ring is attached to the outer periphery of the fume tube by inserting the fume pipe (A type) into the end of the tubular body and then tightening the fixing ring to the end of the tubular body. The close contact with the surroundings allows the fume pipe and the joint itself to be connected by the close contact, and the gap between the fume pipe and the joint is eliminated to prevent water leakage.
Further, considering the frictional resistance between the water sealing ring and the fixed ring when tightening, the smooth ring can be tightened by providing the sliding ring. In addition, by making the tubular body lightweight and molded from a rigid and flexible thermoplastic resin material, and by molding the water sealing ring from a rubber material excellent in compression strain resistance characteristics, Bending can be caused at the joint in the row where the fume tubes of the book are connected, and it becomes adaptable in response to ground movement such as ground 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 portion of the joint in which the water sealing ring and the fixing ring are arranged in advance. it can.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Next, the present invention will be described in detail based on the embodiments shown in the drawings. FIG. 1 shows a plastic joint 1 of the present invention, which, as shown, includes a tubular body 2 formed from a thermoplastic resin material that is lightweight, rigid and flexible. , A water-sealing ring 3 formed of a rubber material having excellent compression strain resistance characteristics
A fixed ring 4 and a sliding ring 5. The cylindrical main body 2 has a general portion 6 excluding both ends which has an inner diameter into which the A-shaped fume tube A can be inserted, and various types are prepared corresponding to the outer diameter of the fume tube A. The rib 7 for abutment is integrally formed over the inner circumference of the center of the tubular body 2, and both end portions 8 of the tubular body 2 are provided with a stepped shape with an enlarged diameter. At least one convex wall 10 protruding in the longitudinal direction of the tubular body 2 is integrally provided on the inner surface of the inclined portion 9 extending from the general portion 6 in the circumferential direction. Also, 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 slidability with the water sealing ring 3.

In the water sealing ring 3, the inner diameter of the opening 13 is slightly larger than the outer diameter of the fume tube A,
As shown in the figure, it is arranged inside the end portion 8 so that the fume tube A can be inserted into the tubular body 2 with the water sealing ring 3 positioned inside the end portion 8. ing. The water-sealing ring 3 is provided with at least one ridge 14 that is in contact with the convex wall 10 integrally along the circumferential direction of the outer peripheral surface that contacts the inclined portion 9. It is necessary that one of the convex wall 10 and the convex line 14 is inserted between the other, and for example, when the convex wall 10 is one as shown in FIG. It is preferable that two ridges 14 are provided so as to sandwich the convex wall 10.
Since the water-sealing ring 3 is made of a rubber material as described above and is arranged inside the end portion 8, the fumes are pressed by pressing in the longitudinal direction of the tubular main body 2. It is capable of projecting and deforming so as to come into close contact with the pipe A and the inclined portion 9.

The fixing ring 4 is an outer screw 1 of the end portion 8.
1 has an internal thread 15 to be screwed onto the inner wall of the fume tube A, and the inner diameter of the opening 16 is slightly larger than the outer diameter of the fume tube A, similarly to the ring 3 for water sealing. The fume tube A can be inserted into the tubular main body 2 in a state where it is attached to the initial position before tightening.
Further, in this fixing ring 4, a convex wall 19 projecting in the longitudinal direction of the tubular main body 2 is integrally provided over the circumferential direction of the sliding portion 12, and the convex wall 19 is provided on the convex wall 19. Correspondingly, it is inserted in a groove 20 provided in the sliding ring 5. By thus determining the position of the sliding ring 5 relative to the fixed ring 4, the fume tube A can be inserted easily and accurately. Further, in the sliding ring 5, a pushing wall 17 projecting integrally in the longitudinal direction of the tubular main body 2 is provided so as to integrally extend in the circumferential direction of the surface of the sliding ring 5 that contacts the water sealing ring 3. And is inserted into a groove 18 provided in the water sealing ring 3 corresponding to the push wall 17. Since the convex wall 10 and the pushing wall 17 are inserted from the opposite sides of the water sealing ring 3 in this way, the fixing ring 4 and the sliding ring 5 are not inserted when the fume tube A is not inserted. By attaching the water sealing ring 3 to the cylindrical body 2, the convex wall 10 and the pushing wall 1
It is supported by 7 and does not fall off from the cylindrical main body 2. further,
It is also possible to insert the tubular body 2, the water sealing ring 3, the fixed ring 4 and the sliding ring 5 into the fume tube A in an assembled state. Further, after the insertion, when considering the frictional resistance acting on the contact portion between the sliding ring 5 and the water sealing ring 3 at the time of tightening, provision of the sliding portion 12 enables smooth tightening.

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
The fixing ring 4 may be inserted into the tubular body 2 through the opening 16 of the fixing ring 4, and the fixing ring 4 may be screwed in the tightening direction.
Moves toward the longitudinal butting rib 7 side of the tubular body 2 and thus presses the water sealing ring 3.
Then, when the fixing ring 4 is tightened, the water sealing ring 3 is pressed in the longitudinal direction of the tubular body 2 so as to project and deform in the pipe axis direction and in the direction perpendicular to the pipe axis. The inner peripheral surface side of the ring 3 is in close contact with the outer peripheral surface of the fume tube A, and water flows outward from between the outer peripheral surface of the fume tube A inserted into the tubular body 2 and the inner peripheral surface of the tubular body 2. The watertight condition is secured so that it does not leak out. As described above, the fume pipe A is connected by tightening the fixing ring 4 on each end side of the joint. When removing the fume pipe A, the fixing ring 4 is rotated in a loosening direction for water sealing. The pressure on the ring 3 is released, the water-sealing ring 3 returns to the initial shape, and is separated from the outer peripheral surface of the fume tube A, and then the fume tube A may be removed.

FIG. 2 shows another embodiment, in which the convex wall of the fixed ring 4 and the concave groove of the sliding ring 5 are not provided in the above-described embodiment, and Similarly, when the fixing ring 4 is tightened, the water-sealing ring 3 is pressed in the longitudinal direction of the tubular main body 2 so as to project and deform in the pipe axis direction and in the direction perpendicular to the pipe axis. The inner peripheral surface side of the stop ring 3 is in close contact with the outer peripheral surface of the fume tube A so that the outer side of the fume tube A inserted into the tubular body 2 and the inner peripheral surface of the tubular body are exposed to the outside of the joint. The watertight condition is secured so that no water leakage will occur.

FIG. 3 shows another embodiment, which is different from the above-mentioned embodiments in that the inclined portion 9 is not provided with a convex wall, and the water sealing ring 3 has Also, no concave groove corresponding to the convex wall is provided, and the end surface of the water sealing ring 3 on the inclined portion side is formed as an inclined surface corresponding to the inner surface of the inclined portion 9. By rotating the fixing ring 4 and tightening it, the water sealing ring 3 is pressed against the inner surface of the inclined portion 9 and the pushing wall 17.
Between the outer surface of the fume tube A and the inner surface of the cylindrical main body 2 to be leaked to the outside of the joint. The watertight condition is ensured to prevent the occurrence of

Unlike the above-described embodiment, FIG. 4 shows an internal thread 15 of the tubular body 2 and an external thread 11 of the fixing ring 4, which is similar to the above-described embodiment. A watertight state is ensured so that the water sealing ring 3 is in close contact with the outer peripheral surface of the fume tube A so that water does not leak between the outer peripheral surface of the fume tube A and the inner surface of the cylindrical main body 2. I am trying to do it.

[0012]

As described above, according to the plastic joint for a fume tube of the present invention, a plastic tube body into which a fume tube can be inserted at both ends, and a tubular body having a threaded portion at both ends thereof is provided. , A water-sealing ring which is located at the inner peripheral portion of each end of the tubular body and has elastic properties capable of projecting and deforming in the pipe axis direction and in a direction perpendicular to the pipe axis; A fixing ring that is screwed and presses the water sealing ring against the tubular main body at the time of screwing to deform the water sealing ring in the pipe axis direction and in a direction perpendicular to the pipe axis. It is characterized in that it is provided with a sliding ring having slidability which is located between the fixing ring and the water sealing ring when tightening the Ring and tubular body And its fume tube and the joint with a simple operation of inserting to tightening the retainer ring, i.e.,
Two fume pipes can be connected via this joint, and the work of connecting the A-type fume pipe is very simple, and the range of use of the A-type pipe is expanded. Further, since the water sealing ring is elastically brought into close contact with the outer peripheral surface of the fume pipe, even if the outer diameter of the fume pipe is slightly different, the error is absorbed by the deformation of the ring to prevent water leakage. It can be prevented from occurring. Then, by making the tubular body lightweight and molded from a thermoplastic resin material having rigidity and flexibility, and forming the water sealing ring from a rubber material having excellent compression strain resistance characteristics, a plurality of Bending at the joint part is allowed in the row where the fume pipes are connected, and even if the fume pipe descends due to ground subsidence, the joint itself will bend, and it is possible to more reliably prevent the fume pipe from coming off and gaps from occurring. 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 the joint in which the water sealing ring and the fixing ring are arranged in advance. You can do it like this. Further, since the portion having the slidability is provided even when the fixing ring is tightened, the tightening can be performed smoothly, and the connecting work can be more easily performed.

[Brief description of 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 diagram showing still another embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Plastic joint 2 ... Cylindrical main body 3 ... Water sealing ring 4 ... Fixed ring 5 ... Sliding ring 9 ... Inclined part 11 ...
Outer screw 12 ... Sliding part 15 ... Inner screw 17 ... Pushing wall 18 ... Recessed groove A ... Hume pipe

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masahiro Noguchi 7-14-3 Ginza, Chuo-ku, Tokyo Inside the National Hume Association (72) Inventor Takefumi Matsumura 7-14-3 Ginza, Chuo-ku, Tokyo Nationwide In the Hume Tube Association

Claims (3)

[Claims] 1. A plastic cylindrical body into which a fume tube can be inserted at both ends, and a tubular main body having a threaded portion at both ends thereof, and a tubular body located at an inner peripheral portion of each of both ends of the tubular main body. An elastic water sealing ring capable of projecting and deforming in an axial direction and a direction perpendicular to the pipe axis, and a water sealing ring screwed to both ends of the tubular body, and the water sealing ring is threaded at the time of screwing. A fixing ring that presses the water sealing ring to project and deform the water sealing ring in the pipe axis direction and in a direction perpendicular to the pipe axis; and a position between the fixing ring and the water sealing ring when the fixing ring is tightened. And a sliding ring having a sliding property, and a plastic joint for a fume pipe. 2. The tubular body is formed from a thermoplastic resin material that is lightweight and has rigidity and flexibility, and the water sealing ring is formed from a rubber material having excellent compression strain resistance characteristics. The plastic joint for a fume pipe according to claim 1, wherein 3. The plastic joint for a fume pipe according to claim 1, wherein the water sealing ring and the fixing ring located at both ends of the tubular body have an opening shape into which a fume pipe can be inserted.