JPS6388394A - Connector for piping - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a pipe fitting that connects pipes with one touch. This relates to a connecting tool that allows you to connect another pipe with one touch to the tip of a pipe that has just been cut.

2. Description of the Related Art As shown in FIG. 3, a conventional connection tool of this type includes two flanges 12 and 13 provided at the tip of a connecting vibe 11.
A structure in which a rubber tube 14 is bonded between flanges 12 and 13 and an air pipe 16 is attached to one flange 13 is used.

When the connecting pipe 11 of this connector is inserted into the tip of the outflow pipe 16 (the connecting vibe 11 and the outflow pipe 16 may be integrated) and pressurized air is injected from the air pipe 16, the rubber cylinder 14 swells. It is fixed in close contact with the inner surface of the connected pipe 17, and the connected pipe 17 and the connecting vibe 11
It is possible to connect

Problems to be Solved by the Invention However, it is necessary to provide a port for introducing air into the flange 13, and as shown in FIG. . That is, the currently available connectors of this type are limited to those that can be used when the inner diameter D' of the pipe 17 to be connected is 160 or more.

In addition, since the rubber tube 14 is in full contact with the connected pipe 17, the holding force between the connecting tool and the connected pipe 17 is not strong compared to the pressure of the introduced air. Furthermore, in this structure, the fixed part is long (t) in FIG. 3, and the straight part at the end of the connected pipe 17 is 10 to 15
There was a drawback that it could not be used without it. In other words, in the connector having the structure shown in Fig. 3, when air is pressurized into the rubber tube 14, the tube 14 swells from the center of the connector, so in order to obtain a constant holding force, a certain length from the center to both sides is required. This is because a stable holding force cannot be obtained unless the inner surface of the pipe 17 to be connected and the cylinder 14 come into contact with each other in the straight part of the pipe.

Means for Solving the Problems In order to solve the above problems, the piping connector of the present invention includes a nut, an elastic cylinder, and a collar inserted in this order into the connecting pipe, and the nut is formed as a part of the connecting pipe. The elastic tube is screwed into the threaded portion and rotated to press the elastic tube into the collar.

Effect: With the above configuration, when the elastic tube is pressed against the collar by the nut, the outer diameter of the elastic tube increases, and the outer circumferential surface of the elastic tube comes into close contact with the inner surface of the connected pipe.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 and 2. Figure 1 shows a perspective view of this embodiment, and Figure 2 shows a perspective view of this embodiment.
The figure shows a sectional view taken along line A--A in FIG.

In Figures 1 and 2, 1 is a connecting pipe,
In the diagram, there is an outflow pipe or a commercially available hose joint (
(not shown) are connected, and the connected pipe 2 is connected to the left end. 1a is a threaded portion formed on a part of the outer periphery of the connecting pipe 1. 3 is a nut screwed onto the threaded portion 1a. 4 and 6 are ring plate-shaped collars, and 6 is an elastic cylinder made of synthetic resin such as silicone rubber. And Natsu 3. Collar 40 elastic tube 6. The connecting pipes 1 are inserted in the order of the collars 6. Reference numeral 7 denotes a collar fixing pin that is fixed through the tip of the connecting pipe 1, and prevents the collar 6 from coming off.

In the above configuration, when the elastic tube 6 is placed in the connected vibe 2 and the nut 3 is rotated to move the nut 3 to the left in FIG. 2, the elastic tube 6 moves to the collar 4.
5, and the outer diameter of the elastic cylinder 6 increases. Therefore, the outer circumferential surface of the elastic cylinder 6 and the inner circumferential surface of the connected pipe 2 come into close contact, and the connection between the connecting tool and the connected pipe 2 is completed.

According to the above configuration, the tightening torque of the nut 3 can be easily obtained, and the connection between the connecting tool and the connected pipe 2 becomes strong. Furthermore, compared to the conventional type, the connecting portion can be made shorter, and the connection can be made even if the straight portion at the tip of the pipe 2 to be connected is short.

Furthermore, since the structure is simple, the inner diameter of the connecting pipe 1 can be increased to increase the effective flow diameter, and since an air pressure feeding device is not required, the connection work is simple.

Effects of the Invention As described above, according to the piping connector of the present invention, it is possible to use a connecting pipe with a diameter that is not much different from the inner diameter of the pipe to be connected, and it is easy to obtain a large holding force. The length can be reduced, which allows for good fluid flow, and allows connection even if the straight section at the tip of the pipe to be connected is short. Furthermore, tightening the nuts can be done easily, speeding up the installation and removal of connectors, and its industrial value is significant.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a piping connector showing an embodiment of the present invention;
FIG. 2 is a sectional view taken along line A--A in FIG. 1, and FIG. 3 is a sectional view of a conventional connector. 1... Connection pipe, 1a... Threaded part,
3...Natsuto, 6...Color, 6...
...Elastic cylinder.

Claims (1)

[Claims] A configuration in which a connecting pipe is inserted in the order of a nut, an elastic tube, and a collar, the nut is screwed into a threaded portion formed on a part of the connecting pipe, and the elastic tube is pressed against the collar by rotating the nut. Connecting fittings for piping.