JP2606316Y2 - Pipe fittings - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint used for connecting two drainage pipes made of different materials.

[0002]

2. Description of the Related Art In general, the means of connecting drainage pipes arranged in a building or the like differs depending on the material of the pipes. In the case of a vinyl chloride (hereinafter abbreviated as "PVC") pipe, the connecting means is shown in FIG. As shown in FIG. 4 (a), a means is used in which the ends of the PVC pipes b and b are fitted into both ends of a pipe joint a made of PVC formed in a tubular shape, and the fitted portions are joined by an adhesive. In the case of (1), as shown in FIG. 4 (b), a female screw d is engraved on the inner peripheral surface of a pipe joint c made of a steel material formed in a cylindrical shape, and a male screw f is formed on the end of the steel pipes e and e. , F are engraved, and the male screws f, f are screwed and connected to the female screw d.

[0003] In the case of a thin metal tube such as stainless steel, as shown in FIG.
A large-diameter portion h is formed at the end of the thin-walled metal tube g, and the end of the other thin-walled metal tube g is fitted into the large-diameter portion h, and the fitted portion is joined with an adhesive, so that the thin-walled metal tubes g g is connected.

[0004]

[Problems to be solved by the invention]
It is for connecting pipes of the same material, for example,
Connect two drain pipes made of different materials, such as connecting a thin metal pipe made of stainless steel such as a downspout used in a conspicuous place outdoors and a PVC pipe used in a discreet place indoors. Conventionally, there was no pipe joint suitable for this, and it was not possible to easily connect. The present invention has been made in view of such a conventional situation,
It is an object of the present invention to provide a pipe joint capable of favorably connecting drainage pipes made of different materials.

[0004]

According to the present invention, a small-diameter pipe portion internally fitted to an outflow-side pipe is inclined at a terminal end of a large-diameter pipe portion externally fitted to an inflow-side pipe to a small diameter toward the outflow side. The outer diameter of the small-diameter pipe portion is formed to have the same diameter as the large-diameter pipe portion, and the base portion is fixed to the outer peripheral surface of the tapered pipe portion and is connected to the outflow-side pipe. An outer sleeve is provided, and an annular gap is formed between the outer sleeve and the small-diameter tube so as to closely fit the outflow-side pipe.

[0005]

[Function] An end of an inflow-side pipe made of a thin metal pipe such as stainless steel is inserted into a large-diameter pipe, and an inner peripheral surface of the large-diameter pipe and an outer peripheral surface of the inflow-side pipe are bonded with a caulking agent. On the other hand, the end of the outflow-side pipe made of a PVC pipe is inserted into an annular gap formed on the outer circumference of the small-diameter pipe, and the inner peripheral surface of the PVC pipe and the outer peripheral surface of the small-diameter pipe, and the outer circumference of the PVC pipe are inserted. By adhering the surface and the inner peripheral surface of the sleeve with a caulking agent, it is possible to connect two different drainage pipes made of a thin metal pipe such as stainless steel and a PVC pipe.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. The pipe joint 1 includes a large-diameter pipe portion 3 into which an inflow-side pipe 2 made of a thin-walled metal pipe such as stainless steel is inserted at one end, and is entirely made of the same material as the inflow-side pipe 2. The inner diameter of the large-diameter tube portion 3 is set so that the outer diameter of the large-diameter tube portion 3 can be substantially closely fitted to a tube whose outer diameter is specified by Japanese Industrial Standard (JIS).

[0007] At the outflow end of the large-diameter pipe section 3, there is provided a tapered pipe section 4 having a small-diameter slope formed by drawing.
The small-diameter pipe section 5 is coupled. The small-diameter pipe portion 5 is formed to have an outer diameter dimension that can be fitted into the outflow-side pipe 7 made of a PVC pipe in a substantially close fit manner. A sleeve 6 having the same diameter as the tube 3 is provided. The sleeve 6 is provided so as to surround the small-diameter tube 5 by fixing a base 6 ′ having one end bent obliquely inward to an outer peripheral surface 4 ′ of the tapered tube 4 by welding. An annular gap 8 is formed between the sleeve 6 and the small-diameter pipe portion 5 and has an interval substantially the same as the thickness of the outflow-side pipe 7.

In such a configuration, in order to connect the inflow side pipe 2 made of a thin metal pipe such as stainless steel and the outflow side pipe 7 made of a PVC pipe by the pipe joint 1, the large diameter pipe section 3 of the pipe joint 1 is used. The end of the inflow-side pipe 2 is inserted into the tapered pipe section 4 until it comes into contact with the tapered pipe section 4, and the inner peripheral surface 3a of the large-diameter pipe section 3 is filled with a caulking agent such as silicon previously applied to the inserted section.
While the outer peripheral surface 2b of the inflow side pipe 2 is adhered, and the end of the outflow side pipe 7 is inserted into the annular gap 8 until it comes into contact with the tapered pipe section 4, and silicon or the like previously applied to the inserted portion is inserted. The inner peripheral surface 7a of the outlet pipe 7 and the outer peripheral face 5b of the small-diameter pipe portion 5, and the outer peripheral face 7
When b and the inner peripheral surface 6a of the sleeve 6 are bonded to each other, the two pipes 2 and 7 are connected by the pipe joint 1 as shown in FIG.

At the time of the connection operation, the respective ends of the inflow-side pipe 2 inserted into the large-diameter pipe section 3 and the outflow-side pipe 7 inserted into the annular gap 8 abut on the tapered pipe section 4. By inserting the tapered tube up to this point, the insertion amount becomes constant, and the tapered tube portion 4 can function as a stopper that regulates the insertion amount.

In the above-mentioned connected state, as shown in FIG. 3, when the pipe joint 1 is disposed vertically and water flows from the inflow pipe 2 located at the upper part to the outflow pipe 7 at the lower part, The water passing through the tapered pipe 4 smoothly flows along the inclined surface and is guided to the small-diameter pipe 5 because the tapered pipe 4 is inclined toward the outflow side. Then, since the small-diameter pipe portion 5 is fitted in the outflow-side pipe 7, water is guided to the small-diameter pipe section 5 and is guided into the outflow-side pipe 7. That is, the small-diameter pipe portion 5 can guide and shield water, and the inner peripheral surface 7a and the outer peripheral surface 7b of the end of the outflow-side pipe 7 inserted into the annular space 8 are provided. Are adhered to the small-diameter pipe portion 5 and the sleeve 6 respectively, so that water can flow through the outflow-side pipe 7 without leaking from the end of the outflow-side pipe 7.

Furthermore, since the thin metal material such as stainless steel and the PVC pipe have different coefficients of thermal expansion, when exposed to direct sunlight in summer, the pipe joint 1 made of thin metal such as stainless steel and the inflow side pipe having a large coefficient of thermal expansion when exposed to direct sunlight. 2 is a PVC outlet pipe 7
It expands more compared to. Here, the joint between the large-diameter pipe portion 3 and the inflow-side pipe 2 of the pipe joint 1 is made of the same material and has the same expansion coefficient, so that no problem occurs. On the other hand, when the sleeve diameter of the sleeve 6 forming the annular gap 8 is increased due to thermal expansion and the space between the sleeve 6 and the outer circumferential surface 7b of the outlet pipe 7 made of PVC is increased, the inner circumferential surface of the sleeve 6 is increased. 6a
The caulking agent, such as silicon, that bonds the outer peripheral surface 7b of the outlet pipe 7 to the outer pipe 7 follows the expansion of the sleeve 6 because it has an appropriate elasticity. Even if there is a gap between the inner peripheral surface 6a and the inner peripheral surface 6a, the small-diameter pipe portion 5 expands and its diameter increases. 7 inner peripheral surface 7
a on the other hand, and water tightness is maintained. Thereby, even when the pipe joint 1 is arranged in a horizontal direction, water leakage does not occur.

[0012]

According to the present invention, as described above, a small-diameter pipe portion internally fitted to the outflow-side pipe is formed at the end of the large-diameter pipe portion externally fitted to the inflow-side pipe to have a small diameter toward the outflow side. An annular shape which is coupled through an inclined tapered tube portion, and a sleeve tube is disposed on the outer periphery of the small-diameter tube portion, and the outflow-side pipe is inserted between the sleeve tube and the small-diameter tube portion. Since the gap is formed, the inflow side pipe made of thin metal pipe such as stainless steel and the outflow side pipe made of PVC pipe can be easily connected, and the water flow is good and the water leaks. In addition, since the end of the outflow-side pipe can be covered and covered by the sleeve, excellent effects such as good appearance can be obtained.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a state before connection of a pipe joint of an embodiment of the present invention to an inflow side pipe and an outflow side pipe.

FIG. 2 is a plan view of the pipe joint.

FIG. 3 is a longitudinal sectional view showing a connection state of the above-described pipe joint, an inflow side pipe, and an outflow side pipe.

FIG. 4 is a longitudinal sectional view showing a conventional water pipe connecting means.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pipe joint 2 Inflow side pipe 3 Large diameter pipe part 4 Tapered pipe part 4 'outer peripheral surface 5 Small diameter pipe part 6 Sleeve tube 6' base 7 Outflow side pipe 8 Annular clearance

Claims (1)

(57) [Scope of request for utility model registration] 1. A small-diameter pipe part internally fitted to an outflow-side pipe is provided at a terminal end of a large-diameter pipe part externally fitted to an inflow-side pipe via a tapered pipe part having a small diameter inclined toward the outflow side. A sleeve tube is formed on the outer periphery of the small-diameter tube portion and has the same diameter as the large-diameter tube portion, and has a base fixed to the outer peripheral surface of the tapered tube portion and externally fitted to the outflow-side piping. A pipe joint, wherein an annular gap is formed between the sleeve tube and the small-diameter tube portion so as to closely fit the outflow-side pipe.