JPS587181Y2 - pipe fittings - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a so-called universal pipe joint that allows angle adjustment.

The angle can be changed by making the inner end of one tube have a spherical shape and the outer end of the other tube having a spherical shape, fitting them together, and sliding the fitted portions against each other. So-called universal pipe joints are well known.

In this type of universal pipe joint, in order to maintain the liquid tightness of the sliding fitting part, it is necessary to insert a seal ring in the fitting part, but the presence of the seal ring makes the fitting part tight. It becomes difficult to slide that part.

This invention was completed with the above points in mind, and its gist is that the inner surface of the end of the tube is spherical, and that the spherical portion has a spherical outer surface. In a pipe joint into which a short pipe having a structure is inserted, the short pipe is partially separated,
This partial surface is inclined with respect to the axis of the VC tube so that the inner surface side is located closer to the opening than the outer surface side, and an annular elastic body is bonded to the partial portion with the annular elastic body protruding from the inner surface of the short tube. It's on a pipe joint that serves as a socket.

Next, the pipe joint of this invention will be explained with reference to the embodiments shown in the drawings.

Reference numeral 1 denotes a pipe body which is a joint body made of hard vinyl chloride resin, etc., one end part 11 of which is bulged into a spherical shape, with both the inner and outer surfaces being spherical, and the other end part 12 is a pipe insertion port. It is said that

Reference numeral 2 denotes a short tube having a spherical outer surface corresponding to the inner surface shape of the spherical bulge 11, and the first short tube 21 and the second short tube 2
2 and 2 are inclined with respect to the short axis of the short tube 2.

The first short pipe 21 and the second short pipe 22 are connected to the annular elastic body 3.
is inserted and fitted into the spherical bulge 11 of the tube body 10 with its inner surface protruding from the inner surfaces of the short tubes 21 and 22.

The first short pipe 21 and the second short pipe 22 have inner diameters slightly larger than the outer diameter of the connecting pipe 4, and serve as pipe sockets into which the ends of the connecting pipe 4 are inserted and connected. There is.

Reference numeral 211 denotes a stopper for locking the connecting tube 4 provided protruding from the inner peripheral surface of the inner part of the first short tube 21, and the length of the inner surface of the first short tube 21 is equal to the insertion distance of the connecting tube 4. It is determined to have a predetermined length due to the following relationship.

In the first short tube 21 and the second short tube 22, the holes 212, 221 are spaced circumferentially through the center of the tube wall, thereby saving material.

Further, by cutting out a part of the spherical outer surface of the first short tube 21 to provide a notch, raw material can be saved and the short tube 21 can be easily inserted into the spherical bulge 11. can.

In this embodiment, the tube insertion port 12 of the tube body 1 is bent at a certain angle with respect to the tube axis direction of the spherical bulging portion 11, but there are cases where the tube insertion port 12 is not bent. Other connections may also be used.

Further, the opening end of the spherical bulge 11 may be bent outward to provide a flange-like portion for reinforcement.

As described above, the pipe joint of this invention is a pipe joint in which the inner surface of the end of the pipe body is spherical, and a short pipe having a portion with a spherical outer surface is inserted into the spherical part. In this case, the short pipe is divided into parts, and a seal ring is installed at the part where the parts are separated with a seal ring protruding from the inner surface of the short pipe to serve as a pipe socket. It can be rotated, and the inside of the short tube in the sliding part of the casing becomes the tube socket, so there is no need to extend the opening side of the short tube and provide a separate tube socket, resulting in a smaller size. The body can seal the fitting part and the connection part with the connecting pipe.

Furthermore, in this invention, since the short tube is sectioned with a cutting line that is inclined with respect to the tube axis, the second
The length l of the outer surface of the short tube 22 can be made longer than the inner surface l.

Therefore, the constant length g of the inner surface? In this case, the rotation angle of the tube 4 can be increased, and the short tube, especially the 29th short tube placed in the opening, can be further downsized, making the tube joint more compact.

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional front view showing one embodiment of this devised pipe joint, and Fig. 2 is a longitudinal cross-sectional view partially showing a state in which a connecting pipe is connected to the pipe joint of Fig. 1 at a predetermined angle. . 1... tube body, 11... spherical bulge,
21...First short tube, 22...Second short tube, 3...Annular elastic body.

Claims (1)

[Scope of utility model registration request] In a pipe joint in which the inner surface of the end of the tube body is spherical, and a short pipe having a spherical part □ and a part whose outer surface is formed into a spherical shape is inserted, the short pipe is divided into parts, and this part The cut surface is inclined with respect to the tube axis so that the inner surface is located closer to the opening than the outer surface, and an annular elastic body is attached to the cut portion with an annular elastic body protruding from the inner surface of the short pipe to form a pipe socket. Pipe fittings that are known as pipe fittings.