JPS5915825Y2 - pipe fittings - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an improvement of a pipe joint.

An object of the present invention is to provide a pipe joint that can securely perform a tightening action and prevent fluid leakage.

Therefore, the present invention includes a main joint pipe 2 that is encased at the connecting end of a connecting ring 1, a synthetic resin backing 3 that fits into the connected pipe 1, a seat ring 4 made of hard synthetic resin that fits inside the backing, and a joint made of the same material. A helical tightening member 5 integrally provided with a biting protrusion 10 having an edge-shaped cross section on its inner peripheral surface, and a tightening member that presses the helical tightening member 5 and covers the seat ring 4 and the backing 3. Several engagement holes 8 are provided in the lowermost surface of the tightening member 5 into which the protrusions 7 provided on the seat ring 4 fit, and the tightening member 5 is inserted into the tightening ring 6. This pipe joint is characterized by forming a conical surface 9 that presses against the pipe joint.

The illustrated embodiment exemplifies a mode in which two connected rings 1, 1' are connected by the pipe joint of the present invention, but it goes without saying that the invention is not limited to the connection between pipes.

A biting protrusion 10 with an edge-like cross section is integrally provided on the inner circumferential surface of the spiral tightening member 5 shown in the figure. It is strongly pressed by surface 9.

Therefore, it is desirable that the connected pipes 1° 1' be made of a material into which the protrusions 10 can dig.

Reference numeral 1a shown in FIG. 8 (A) 9 and FIG. 9 (A) 9 is a coating layer for this purpose.

In addition, the synthetic resin backing 3 may be one with protruding fins 12 and 12' provided with a V-shaped groove 11 for catching leaked liquid as shown in Fig. 7, or one with a simple circular cross section as shown in Fig. 9. .

Since the tightening member 5 has a spiral shape that is integrally connected from the front end to the rear end, the spiral can be tightened by fixing one end and turning the other part.

Since the inner end of the tightening member 5 is in contact with the backing 3 via the seat ring 4, when the female ring 6 is tightened and the backing 3 is deformed due to pressure, the tightening member 5 only closes at the inner end. It becomes difficult to rotate and stops, but then only the portion other than the inner end rotates due to the rotation of the female ring 6, so the tightening member 5 is eventually tightly tightened and the protrusion 10 on its inner circumference is firmly covered. Connecting ring 1,1
’ to secure it.

Therefore, the tightening member 5 can be tightened effectively due to the spiral shape.

Since the present invention has the contents explained above, the tightening screw ring 6 is screwed onto the thread 13 of the ring joint main pipe 2 as shown in Figures 8 and 9 A, and tightened as shown in the opening in the same figure. The backing 3 is deformed and tightly adheres to and seals the main pipe 2 and the connected ring 1 or 1'.

In particular, since the helical tightening member 5 is also fitted into the seat ring 4, it is tightened by the rotating action of the conical surface 9 to ensure a secure seal.
A ring joint that does not cause water leakage can be obtained.

In addition, since the tightening member 5 is strongly pressed against the outer surface of the connected pipe 1 through the biting protrusion 10, there is no need for the connecting pipe to be pulled out, and the amount of biting of the protruding bar 10 is small, so that almost no part of the connecting pipe is penetrated into the outer surface of the connecting pipe. It has the effect of extending the life of the pipe because it does not cause any damage.

[Brief explanation of drawings]

The drawing shows one embodiment of the pipe joint according to the present invention.
Fig. 1 is a front view partially shown in section, Fig. 2 is a plan view, Fig. 3 is a half-sectional front view of the helical tightening member, Fig. 4 is a bottom view of the same, and Fig. 5 is a plan view. Fig. 6 is a front view of the seat ring, Fig. 6 is a plan view, Fig. 7 is a sectional view of the synthetic resin backing, Fig. 8 is a sectional view showing the tightened state, and Fig. 9 is a tightening using different synthetic resin backings. FIG. 3 is a cross-sectional view showing the attached state. 1. Pipe to be connected, 2. Main pipe of the joint, 3. Synthetic resin backing, 4. Seat ring, 5. Spiral tightening member, 6. Tightening ring, 7. Protrusion, 8 ...Engagement hole, 9..Conical surface, 10.. Biting protrusion.

Claims (1)

[Scope of utility model registration request] A joint main pipe 2 encasing the connecting end of the connected pipe 1, a synthetic resin backing 3 that fits into the connected pipe 1, a hard synthetic resin seat ring 4 placed on the outside thereof, and an inner periphery molded from the same material. A helical tightening member 5 integrally provided with a biting protrusion 10 having an edge-shaped cross section on its surface, and a tightening ring that presses the helical tightening member 5 and covers the seat ring 4 and the backing 3. Consists of 6,
The lowermost surface of the tightening member 5 is provided with several engagement holes 8 into which the protrusions 7 provided on the seat ring 4 fit, and the tightening screw ring 6 is provided with a conical surface 9 that presses the member 5 for tightening. A pipe joint characterized by forming a.