JPS5810062Y2 - pipe fittings - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to improvement of pipe joints.

The purpose of this invention is to effectively prevent pipes from being pulled out, and at the same time to follow the shaking of joints and pipes caused by inter-story displacement of floors that occur during earthquakes and the constant shaking caused by wind in flexible structure buildings. Our objective is to provide pipe fittings that allow

This type of pipe fitting is first equipped with a pressing ring that presses the backing by being pushed inward by the flange within the fitting, and a broken triangular ring that bites into the pipe with the inclined inner surface of the ring is placed between the pipe and the pipe. An intervening type was proposed (see Utility Model Application Publication No. 84184/1984).

The present invention, like the previous invention, can follow the swinging of the pipe without scraping the surface of the pipe or the surface of the pressure flange, but it can follow the swinging trajectory in a more suitable manner and ensure a secure connection. Our goal is to supply pipe fittings.

In order to satisfy the above object, the present invention is constructed as follows.

That is, in the present invention, in the deep part of the joint body 2 to which the pipe 1 is connected,
A first widened part 3 having an annular wall 3' into which the pipe 1 fits and abuts is provided, and a second widened part 10 for forming a gap 9 between the pipe and the main body is provided on the opening side of the main body 2. In a pipe joint in which the inner end face of the second expanded portion 10 is a slope 11, and a pipe tightening rubber ring 4 and a pressure ring 8 for press-contacting this are arranged in the gap 9, the outer peripheral surface of the pipe is An occluded ring 5 having a substantially fan-shaped cross section and having an acute edge 12 on the inner edge,
The suppression ring 8 is disposed adjacent to the rubber ring 4, and has an arcuate inner surface 7 that gradually tapers toward the end in contact with the rubber ring 4. This pipe joint is characterized in that the bottom surface 6 formed in the shape of the bottom surface 6 is placed in contact with the bottom surface 6, and the joint body 2 and the press ring 8 are provided with respective tightening means 13 and 15 integrally.

It is optimal that the arcuate inner surface 7 of the suppression ring 8 is formed to coincide with an arc whose fulcrum is the center line of the joint body 2.

In addition, in the illustrated embodiment, a small-diameter metal ring 17 with a circular cross section is interposed between the substantially fan-shaped occluded ring 5 and the rubber ring 4, and is brought into contact with the pipe 1, so that when the suppression ring 8 is tightened, The ring 17, which has a circular cross section, acts as a lever to slightly tilt the ring 5, which has a circular fan shape, as shown in FIG. .

It should be noted that the cross-sectional shape of the sector-shaped omitted circular ring 5 is not limited to that of the illustrated embodiment.

However, the arcuate bottom surface 6, the arcuate inner surface 7, and the acute edge 12 must be provided, and the shapes of the other sides are arbitrary.

Reference numerals 14 and 16 in the figure refer to collars 13 as the tightening means.
, 15 are bolts and nuts for tightening.

Since the present invention has the above configuration, the collar 1 which is the tightening means
When pressing 3, the press ring 8 is pressed, and its arcuate inner surface 7 moves smoothly along the arcuate bottom surface 6 of the occluded ring 5, pushing the occluded ring 5 inward and downward, so that the occluded ring The acute edge 12 of 5 bites into the pipe 1, and the rubber ring 4 is deformed and tightly attached to the pipe as shown in FIG.
Both pipes 1 are securely connected in a sealed state.

In this state, that is, when the joint body 2 swings with the parallel movement of the pipe, the circular fan-shaped circular ring 5 can follow the joint body while biting into the pipe. This has the effect of not increasing the cutting width of the sharp edge due to misalignment.

In particular, in the case of the present invention, the contact surfaces 6 and 7 of the occluded ring 5 and the press ring 8, each having a substantially fan-shaped cross section, are formed into an arc shape, so that when the tightening means 13 is tightened, the biting occurs. It has a good tightening effect, and there is no risk of it coming loose.

In addition, when interlayer displacement occurs, the bottom surface 6 of the oval ring 5 that is biting into the pipe side and the inner surface 7 of the pressing ring T that it contacts are both circular arcs, so they move along the circular arc, so they follow the shaking well. Therefore, it has the feature that the connection between the upper and lower floors is extremely smooth without causing any problems during earthquakes or other shaking.

Furthermore, since the occluded ring 5 as well as the tip of the pressing ring 8 can be pressed against the tightening rubber ring 4 of the pipe 1, the rubber ring 4 is in a state in which all four sides are defined in the inner part of the second expanded portion 10. The pipe 1 can be elastically deformed and the pipe 1 can be effectively tightened.

Thus, according to the present invention, as a type of movable pipe joint, it can perform its functions while appropriately following the interlayer displacement, and therefore has the effect of improving overall connection performance.

[Brief explanation of the drawing]

The drawing shows one embodiment of the pipe joint according to the present invention.
Figure 1 is a front view showing a half section, Figure 2 is a plan view,
Figure 3 is a vertical cross-sectional front view of a portion of the tightened portion before connection, Figure 4 is an enlarged view of a portion of the same as above, Figure 5 is a vertical cross-sectional front view of a portion showing the tightened state of the connection, and Figure 6 7 is an enlarged view of a portion of the same as above, and FIG. 7 is a plan view of the oval ring used in the pipe joint of the present invention. 1... Pipe, 2... Fitting body, 3.
...First expansion part, 31... Annular wall, 4.
...Rubber ring, 5 ...Cross ring, 6
... Arc bottom surface, 7 ... Arc inner surface, 8.
...Press ring, 9...Gap, 10...
...Second expansion part, 11...Slope, 12...
...Sharp edge, 13.15...Tightening means.

Claims (1)

[Scope of utility model registration request] A first expanded portion 3 having an annular wall 3′ into which the pipe 1 fits and abuts is provided in the inner part of the joint body 2 to which the pipe 1 is connected;
A second expanded portion 10 for forming a gap 9 between the pipe and the main body is provided on the opening side of the main body 2, and the second expanded portion 10
In a pipe joint in which the inner end surface of the pipe is a slope 11 and a pipe tightening rubber ring 4 and a pressure ring 8 that press the pipe are disposed in the gap 9, the cross section has an acute edge 12 on the inner edge that bites into the outer peripheral surface of the pipe. A substantially fan-shaped occluded ring 5 is arranged adjacent to the rubber ring 4, and the pressing ring 8 has an arcuate inner surface I that gradually tapers in an arc shape toward the end in contact with the rubber ring 4. A pipe joint characterized in that an arcuate bottom surface 6 formed on the outer periphery of the occluded ring 5 is placed in contact with a surface 7, and respective tightening means 13 and 15 are integrally provided on the joint body 2 and the press ring 8.