JPH0678687U - Drain pipe connection structure - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a connection structure that is excellent in strength and rust prevention of the drainage pipe connection portion and is inexpensive. [Structure] An enlarged diameter receiving port 14 is provided at an end of the drainage pipe 11, a stopper 15 made of rust preventive metal is inserted into the enlarged diameter receiving port 14, and a rubber ring 16 is provided on an inner circumference of the stopper 15. Is attached to connect the pipe to be connected 17 inserted into the rubber ring 16 and the expanded diameter receiving port 14 in a watertight manner, and at the same time, the pipe end cover portion 22 provided on the outer end side of the stopper 15 increases the expanded diameter receiving port 14 The end of the pipe is covered to improve the rust prevention effect on the pipe end.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a connection structure for various drainage pipes.

[0002]

[Prior art]

 For example, as shown in Fig. 4, a drainage pipe structure such as sewage pipes, miscellaneous drainage pipes, and rainwater drainage pipes for building equipment has a collecting pipe 2 installed on the floor 1 and upper and lower collecting pipes 2 standing pipe 3 The connection structure 4 is required at the connecting portion between the collecting pipe 2 and the standing pipe 3.

Conventionally, in the connection structure 4 used for the above-mentioned connection portion, the expanded diameter receiving port 5 is integrally provided by casting at the end of the standing pipe 3 using a cast iron pipe, and the rubber is provided inside the receiving port 5. By incorporating the ring 6 and inserting the lower end of the collecting pipe 2 into the rubber ring 6, the collecting pipe 2 and the standing pipe 3 are connected.

[0004]

[Problems to be solved by the device]

 By the way, in order to form the expanded diameter receiving port using cast iron pipe, the pipe manufacturing process is complicated and the cost is high, and the pipe end is exposed, so rust occurs at the pipe end. There is a problem that

Therefore, an object of the present invention is to provide a drainage pipe connection structure in which pipes can be easily manufactured and rustproofing of pipe ends can be surely performed.

[0006]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention is directed to a diameter-increasing receiving port provided at the end of a drainage pipe whose inner peripheral surface is coated with a hard synthetic resin, and an inside of the diameter-increasing receiving port using a rust preventive metal. Is formed into a cylindrical shape with an outer diameter that fits in the inner diameter of the expanded metal fitting, and a rubber ring attached to the inner circumference of the metal stopper. In addition, a pipe end cover that bends outward and covers the end of the expanded diameter receiving port is provided.

[0007]

[Action]

 The expanded diameter receiving port provided at the end of the drainage pipe can be formed by expanding the diameter of the end of the straight pipe, and the pipe can be easily manufactured at low cost and inserted into the expanded diameter receiving port. Since the metal fittings are made of rust preventive metal and the pipe end cover is provided on the outer circumference of the outer end, it is possible to reinforce the expansion socket and prevent rust at the pipe end.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 1, the drainage pipe 11 has a structure in which the inner peripheral surface of a steel pipe 12 made of a straight pipe is covered with a hard synthetic resin 13 such as vinyl chloride, and one end of the pipe has an expanded diameter. Mouth 14 is formed.

The expanded diameter receiving port 14 is formed by expanding the diameter of the end of the steel pipe 12, and the connected pipe 17 is fitted with a stopper 15 attached to the inner periphery of the steel pipe 12 and a rubber ring 16. The inner diameter of the diameter-increasing receiving port 14 and the straight pipe portion is a sloped step portion 18.

As shown in FIGS. 1 and 2, the stopper 15 is bent so that the inner end of the cylindrical portion 19 just fitted to the inner peripheral surface of the enlarged diameter receiving port 14 contacts the inner surface of the inclined step portion 18. The part 20 is bent inward, and at the outer end of the cylindrical part 19, there is a throttle part 21 that bends inward, and a pipe end cover part that bends outward from the end of the throttle part 21. 22 is provided.

The stopper 15 is made of rust-proof metal such as stainless steel, and the pipe end cover 22 is an annular end plate that extends outward from the end of the throttle 21 and overlaps the pipe end. 23 and an annular peripheral wall 24 which is bent at a right angle from the outer circumference of the end plate 23 and fits on the outer circumference of the expanded diameter receiving port 14.

In the example of FIGS. 1 and 3, the rubber ring 16 has an outer peripheral surface inside the bent portion 20 at the inner end of the tubular portion 25 fitted to the inner peripheral surface of the cylindrical portion 19 of the fastener 15. Providing a protrusion 26 that fits and protrudes inward, a tongue piece 27 that is bent inward toward the inner peripheral side of the outer end of the tubular portion 25, and has a thin thickness toward the tip is provided annularly. The tongue piece 27 serves as a backflow prevention portion of the connection structure, and a plurality of small tongue pieces 28 are provided around the outer circumference and the inner circumference of the cylindrical portion 25.

In the rubber ring 16 shown in FIG. 5, a ridge 26 is provided on the inner end of the tubular portion 25, and the inner side of the upper end of a concave step portion 29 provided on the inner peripheral surface of the tubular portion 25 is directed toward the inside. An annular tongue piece 27 that is inclined downward and has a thick wall at the tip is provided, and an annular collar 30 is provided around the inner periphery of the upper end of the tubular portion 25. When the connected pipe is inserted, The annular collar 30 is bent inward, and the tongue piece 27 is housed in the concave step portion 29.

The connection structure of the present invention has the above-mentioned structure. The drainage pipe 11 is used as the vertical pipe 3 shown in FIG. Connection is obtained by inserting the connected pipe 17 into the rubber ring 16 in the state of FIG. 1 in which the rubber ring 16 is attached to the inner circumference of the stopper 15.

The connected pipe 17 is elastically press-fitted into the cylindrical portion 25 of the rubber ring 16 to compress the same, and the tongue piece 27 at the outer end is bent outward to press the connected pipe 17. The end of the abuts on the ridge 26.

Therefore, the drain pipe 11 and the connected pipe 17 are kept watertight at the connecting portion by the compression of the rubber ring 16, and the stopper 15 inserted along the inner circumference of the expanded diameter receiving port 14 Reinforces the expanded diameter receiving port 14 and the pipe end cover portion 22 covers the pipe end, so that a rust preventive effect on the pipe end is obtained.

As shown in FIG. 4, the drainage pipe 11 is connected not only to the lower end of the collecting pipe 2 and the upper end of the standing pipe 3 but also to the upper end of the collecting pipe 2 and the lower end of the standing pipe 3 and the collecting pipe 3. It can be used to connect various drainage pipes, such as the connection between 2 and the horizontal pipe 7.

[0019]

【effect】

 As described above, according to the present invention, the expanded diameter receiving port provided at the end portion of the drainage pipe can be formed by expanding the diameter of the pipe end, which simplifies the production of the drainage pipe and also prevents the metal fitting inserted in the expanded diameter receiving port. With this, the diameter-enhancing receiving port can be reinforced and the strength can be improved.

Further, since the stopper is made of rust preventive metal and the pipe end cover is provided, the pipe end can be rust-proofed by covering the expanded diameter receiving port.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view of a connection structure according to the present invention.

FIG. 2 is a perspective view in which a part of the stopper is cut away.

FIG. 3 is a partially cutaway front view of a rubber ring.

FIG. 4 is an explanatory diagram showing a connection state of drain pipes.

FIG. 5 is a partially cutaway front view showing another example of the rubber ring.

[Explanation of symbols]

 11 Drain Pipe 12 Steel Pipe 13 Hard Synthetic Resin 14 Expanding Port 15 Stopper 16 Rubber Ring 22 Pipe End Cover

Claims (1)

[Scope of utility model registration request] 1. A diameter-enlarging port provided at an end of a drainage pipe whose inner peripheral surface is coated with a hard synthetic resin, and a tubular shape having an outer diameter that is fitted into the diameter-enlarging port by using a rust preventive metal. It is composed of a combination of a metal fitting formed in the inside of the diameter-increasing port and a rubber ring attached to the inner circumference of the metal fitting, and the metal fitting bends outward at the outer end and expands the diameter. A drainage pipe connection structure with a pipe end cover that covers the receiving end.