JPS61241589A - Connector for single operation type piping - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application This invention relates to a one-touch type (method for easily attaching and detaching in a short time) connector for piping for liquid (water), etc. For example, the present invention relates to a connecting tool for connecting another pipe in a one-touch manner to the end of a water supply pipe for an aquarium, swimming pool, etc., which has no connection structure and is simply a cut pipe.

Conventionally, as a connecting device for the above purpose, two flanges (8) were used at the tip of a connecting pipe (2), as shown in Fig. 4.
A structure is used in which a rubber cylinder (9) is bonded between the flanges (8) and an air pipe 0* is attached to the flanges. Connect this fitting to the outflow pipe (4) (
Attach it to the tip of the connecting pipe (2) and outflow pipe (4) (sometimes they are one piece) and connect it to the connected pipe (as shown in the drawing).
6) and pressurized air is inserted from the air pipe αO, the rubber cylinder (9) swells and is fixed tightly against the inner surface of the connected pipe (6), allowing the connection between the connected pipe and the connecting pipe. be.

Problems to be Solved by the Invention However, with the conventional connector, if both ends of the rubber cylinder are left open, they will swell, so it is necessary to provide flanges on both sides, and air can be pumped into the flanges on both sides. Since it has an inlet port, it can only be made with a large difference between the outer diameter of the connecting tool and the inner diameter d of the connecting pipe, as shown in Figure 4. That is, this type of connector currently available on the market is limited to those that can be used when the inner diameter D' of the pipe to be connected is 150 m or more. In addition, since the rubber tube (2) is in full contact with the pipe to be connected, the holding force between the connecting tool and the pipe to be connected is not strong enough compared to the pressure of the injected air. In this structure, the length of the fixed part, 4 in Figure 4, is long, and the straight part at the end of the connected pipe is 10 to 15 cm long.
There was a drawback that it could not be used without Crn. That is, the fourth
In a connector with the structure shown in the figure, when air is pressurized into a rubber tube, the tube expands from the center of the connector, so in order to obtain a constant holding force, connect a straight section of a constant length from the center to both sides. This is because stable holding force cannot be obtained unless the inner surface of the pipe and the cylinder come into contact with each other.

D1 Means for Solving Problems This invention fixes a cylindrical pedestal having a spiral groove to the tip of a connecting pipe, and attaches an elastic tube made of rubber or plastic with a narrow outer diameter to the groove in a spiral shape. A connecting device that is wound or has such a structure is attached and inserted into the tip of a pipe to be connected, and compressed air is blown into the tube to cause the tube to swell, thereby fixing the pipe to be connected and the connecting pipe. This eliminates the drawbacks of conventional connectors. In this case, it may be manufactured by integrally molding the elastic tube of the pedestal.

The present invention will be described in detail below with reference to the drawings.

The connecting device of the present invention is shown in a perspective view in Fig. 1 and in Fig. 2.
- As shown in cross-section A, a cylindrical pedestal (3) made of an elastic material such as rubber or plastic is fixed to the tip of the connecting pipe (2), and the base (3) is made of an elastic material such as rubber or plastic and has a spiral groove. It is made by winding a soft elastic tube (1) in a spiral shape.

An outflow pipe (4) is connected to the connection pipe (2), and the fluid flows out from the outflow pipe (4). In this case, it goes without saying that the tip of the outflow pipe may be used as the connection pipe, that is, the connection pipe and the outflow pipe may be integrated. One end of the elastic tube (1) is sealed, and the other end is connected to an external source of compressed air. Therefore, by making this elastic tube (1) long, air can be sent from a remote location.

As shown in Fig. 2, this connecting tool is connected to the connected pipe (6) (
When the elastic tube (1) is inserted into the tube (indicated by the dotted line) and compressed air is introduced, the elastic tube (1) expands and is pressed against the inner surface of the pipe to be connected, thereby fixing the connector to the pipe to be connected.

Since the amount of compressed air required is small, a simple device such as a bicycle air pump can be used.

According to this structure, the elastic tube can be inserted into the pipe to be connected freely since it only needs to be soft, and the elastic tube with a small outer diameter is evenly pressed against the inner surface of the pipe to be connected in a spiral pattern, so it is firmly fixed. be done. In addition, since the elastic tube (1), which has an always small outer diameter, is wrapped around a pipe with a relatively large outer diameter (as shown in Figure 1) and inflated by pressurizing air, it is easy to obtain uniform compression at the connection part, and the required pressing force is Depending on the number of wraps, the length of the connection can be minimized by determining the number of wraps. In normal cases, a sufficient holding force can be obtained with a length of about 5 c1n. That is, the connecting portion can be made shorter than that of the conventional type, and the pipe can be used even if the straight portion at the tip of the pipe to be connected is short. Furthermore, since the outer diameter of the connection part is only the outer diameter of the connecting pipe plus about half the diameter of the elastic tube (1), the outer diameter of the connecting pipe must be made larger than the inner diameter of the pipe to be connected. Therefore, the flow of fluid is not obstructed, and the effective flow diameter of the connecting pipe can be increased.

In addition, in this structure, the pedestal (3) has a groove and therefore has unevenness, and the elastic tube is spirally wound along the groove, so when force is applied in the axial direction of the pipe, the groove in the pedestal (3) (
The elastic tube (1) attached to the concave portion has the function of making the connecting portion more firmly fixed as it tries to ride on the shoulder (convex portion) of the groove.

In this structure, since the elastic tube is spirally wound, some fluid may leak. This leakage can be prevented by tightly wrapping the elastic tube. However, when cleaning aquariums, pools, etc., for example, Japanese Patent Application No. 59-018084
As mentioned in the above issue, when cleaning an elevated water tank in a building, a small amount of leakage is actually advantageous for the work.Furthermore, when pressure waves are generated due to the water hammer phenomenon in the piping, this leakage can cause pressure Another advantage is that the waves are absorbed, preventing the connection from coming loose.

FIG. 3 shows another embodiment of the invention.

In this case, backflow prevention packing portions (7) are provided at both ends (or one end) of the cylindrical pedestal (3). Using a connector with this structure can eliminate fluid leakage at the connection.

Effects of the Invention As explained in detail above, according to the connecting tool 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 also possible to use a connecting pipe with a diameter that is not much different from the inner diameter of the pipe to be connected. By winding, etc., it is easy to obtain a holding force (resistance force) against the force in the axial direction of the pipe, so the length of the connecting device can be reduced, so the fluid flow is good and even if the straight part at the end of the connected pipe is short. Can be connected. Furthermore, considering the holding force (withstand pressure against flowing fluid) required of an elastic tube, the tube can be linearly and uniformly pressed against the inner surface of the connected pipe by simply introducing a small amount of low-pressure compressed air. Since the connector is fixed, a stronger connection is possible, and it is much more effective than conventional one-touch connectors.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the present invention, and FIG. 2 is a perspective view showing an embodiment of the present invention.
It is an A sectional view. FIG. 3 is a sectional view showing another embodiment, and FIG. 4 is a sectional view of a conventional one-touch connector. (1) Elastic tube, (2) Connection pipe, (3) Pedestal, (4) Outflow pipe, (5) Tube support, (6) Connected pipe, (7)...Packing part, (8)...
Flange (9)...Rubber tube, 01...Air pipe.

Claims (1)

[Claims] 1. A connecting tool for connecting another pipe to the tip of an open pipe in a one-touch manner, which has a spiral groove at the tip of the connecting pipe (including the case where it is the same as the outflow pipe). Fix a cylindrical pedestal, wrap an elastic tube with a sealed end around the spiral groove, insert the tip of the connecting pipe into the tip of the pipe to be connected, and fix by supplying compressed air into the elastic tube. A one-touch type piping connector 2 characterized in that the elastic tube is tightly wound, a one-touch type piping connector 3 according to claim 1, characterized in that the elastic tube is tightly wound; One-touch piping connector according to claim 1 or 2, characterized in that it has a packing part.