JPH0246832B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a pipe joint that is used by being attached to a connecting portion of water piping, gas piping, or the like.

[Prior art]

Generally speaking, this type of pipe fitting is
The structure described in Japanese Patent No. 49-54113 is known. In this known pipe joint, there is a stepped part for a stopper against which the end of the pipe to be connected is abutted inside the joint body, and a stopper ring, an O-ring, and a collar are inserted, and also serves to prevent the pipe from being pulled out. A stepped portion is formed, and a cap nut for tightening the stopper ring, O-ring, and collar is screwed into the end of the joint body.

[Problem that the invention seeks to solve]

The structure of the conventional pipe joint has a problem in that it cannot be connected unless the types and diameters of the pipes to be connected are standardized. In other words, the types of pipes that are used and connected in general piping include polyethylene pipes (PE pipes), vinyl pipes (VP pipes), general gas pipes (SGP pipes), etc. Although the pipe diameters of the pipes differ slightly, their dimensions require separate pipe fittings for each pipe. Therefore,
Another problem is that pipe joints of different sizes must be prepared for each type of pipe, making management of the pipe joints extremely troublesome.

[Means for Solving the Problems] As a specific means for solving the problems of the conventional example, the present invention provides a stopper that projects inside the cylindrical joint body, and a stopper that extends from the stopper to the free end side. Auxiliary stoppers having the same shape and lower than the stopper are provided at appropriate intervals, and
A threaded portion is provided on the outer circumferential surface of the free end of the joint body, a cap nut is provided to be screwed into the threaded portion, a flange-like protrusion is provided on the inner surface of the cap-nut, and the flange-like protrusion and the auxiliary stopper are connected to each other. The present invention provides a pipe joint characterized in that a rubber ring and a pressure ring are disposed between them, and a clamp ring and a clamp nut are housed and screwed together inside the free end of the cap nut. The cap nut, the rubber ring, and the pressing ring function to stop water, and the clamp ring and clamp nut function to connect the connecting pipe. Further, by providing symmetrical connection mechanisms on both sides of the joint body, it is possible to connect the pipes to be connected on both sides.

〔Example〕

Next, the present invention will be explained in more detail with reference to illustrated embodiments. First, the first embodiment shown in FIGS. 1 to 3 is a case where a pipe to be connected is connected to one end.
1 is a joint body, and a predetermined pipe 2 is connected in advance to the other end of the joint body. In this case, the joint body 1 and the pipe 2 are integrally connected by appropriate means such as adhesion or caulking.

A connection mechanism is provided at one end of the joint body 1, that is, the end to which the pipe 3 to be connected is connected. In this connection mechanism, a stopper 4 is formed to protrude inside the joint body, and an auxiliary stopper 5 is similarly formed to protrude from the stopper toward the free end at an appropriate distance, and the auxiliary stopper 5 has a height as described above. It is formed lower than the stopper 4.

A threaded portion 6 is formed on the outer peripheral surface of the free end portion of the joint body 1, and a cap nut 7 is provided to be screwed into the threaded portion. A flange-like projection 8 is integrally formed on the inner circumferential surface of the cap nut approximately in the middle, and threaded portions 9 and 10 are provided on the inner circumferential surface on both sides of the protrusion as a boundary. is threadedly engaged with the threaded part 6 provided at the end of the joint body 1, and the other threaded part 1
0 is adapted to be screwed into a threaded portion 12 of a clamp nut 11. The inner peripheral surface of the clamp nut 11 is formed into a tapered surface 13 in a direction that opens toward the cap nut 7 side.

When connecting the pipe 3 to be connected to the joint body 1, a belt-shaped rubber ring 14 and a metal pressing ring 1 are attached to the end of the pipe 3 in advance.
5, as well as the cap nut 7, clamp ring 16, and clamp nut 11, and then insert the end of the pipe to be connected 3 into the joint body 1. As shown in FIG. 3, the clamp ring 16 used in this case has an outer circumferential surface formed as a tapered surface 17 and an inner circumferential surface formed as an uneven rough surface 18.
Furthermore, a slit 19 is provided along the length on the side surface.

In this way, the pipe to be connected 3 to be connected is inserted into the joint body 1, and after its end comes into contact with the stopper 4, the cap nut 7 is first screwed onto the threaded part 6 and tightened. , the flange-like protrusion 8 pushes the pressure ring 15 and compresses the rubber ring 14,
A watertight state is maintained between the inner circumferential surface of the joint body 1 and the outer circumferential surface of the connected pipe 3. Next, bag nut 7
When the clamp nut 11 is tightened, the clamp ring 16 is pressed by the tapered surface 17 on the outer circumferential surface and its diameter is reduced, and the inner rough surface 18 comes into pressure contact with the outer circumferential surface of the pipe to be connected 3, thereby tightening the pipe to be connected. Hold firmly so that it does not slip out. In other words, a water-stopping action and a connection-fixing action are performed simultaneously with the connecting pipe.

In this case, the diameter of the pipe to be connected 3 differs depending on its type, and an appropriate gap a will be created between it and the inner diameter of the joint body, but as described above, tightening the cap nut 7 Therefore, the rubber ring 14 is crushed and fills the gap a to stop water, and by tightening the clamp nut 11 to the cap nut 7, the clamp ring 16 is reduced in diameter and fills the gap a. The connection can be made by grasping the pipe 3 to be connected.

The second embodiment shown in FIG. 4 is a case where connected pipes 3, 3a are connected to both sides of the joint body, and the joint body 1 is provided with connection mechanisms on both sides.
That is, the same connection mechanism is provided symmetrically on both sides of the stopper 4 provided approximately at the center of the joint body 1. Since this connection mechanism is substantially the same as that of the first embodiment, the same reference numerals are given and detailed explanation thereof will be omitted.

In any of the embodiments, the water-stop function and the connection function are separated and the respective roles are reliably fulfilled, so even if the diameter of the pipe differs slightly depending on the type of pipe used, Depending on the degree to which the cap nut and clamp nut are tightened, the connection and water stoppage can be made almost completely.

〔Effect of the invention〕

As explained above, the pipe joint according to the present invention is
A stopper is provided to protrude into the inside of the cylindrical joint body, and an auxiliary stopper of the same shape and lower than the stopper is provided at an appropriate distance from the stopper on at least one free end side. A threaded part is provided on the outer peripheral surface of the part.
A cap nut is provided to be screwed into the threaded portion, a flange-like protrusion is provided on the inner surface of the cap nut, and a rubber ring and a pressing ring are disposed between the flange-like protrusion and the auxiliary stopper. As a result, the water-blocking action between the connected pipe and the joint body is almost completely performed. The structure in which the clamp ring and the clamp nut are housed and screwed together inside the free end of the cap nut makes it possible to stably and firmly connect the pipe to be connected to the joint body. Therefore, since water shut-off and connection are accomplished by separate components, reliable connection and water shut-off can be achieved even if there are slight differences in the pipe diameter depending on the type of pipe to be connected. It has an excellent effect.

Furthermore, since the pipe joint of the present invention can be used without being restricted by the type of pipe to be connected, there is no need to prepare a pipe joint for each type of pipe as in the past. It also has the excellent effect of making product management easier.

[Brief explanation of drawings]

FIG. 1 is a side view showing a part of a pipe joint according to a first embodiment of the present invention in cross section, FIG. 2 is a partial cross-sectional view showing the pipe joint of the same embodiment in a state in which the connection is completed, and FIG. 4 is a perspective view of a clamp ring used in the pipe joint, and FIG. 4 is a sectional view showing a pipe joint according to a second embodiment of the present invention. 1... Joint body, 2... Piping, 3, 3a... Connected pipe, 4... Stopper, 5... Auxiliary stopper, 6, 9, 10, 12... Threaded portion, 7... Cap nut, 8 ...flange-like projection, 11 ... clamp nut, 13, 17 ... tapered surface, 16 ... clamp ring, 18 ... rough surface, 19 ... slit.

Claims (1)

[Scope of Claims] 1. A stopper is provided to protrude into the interior of the cylindrical joint body, and an auxiliary stopper of the same shape and lower than the stopper is provided at an appropriate distance from the stopper on the free end side, and A threaded portion is provided on the outer peripheral surface of the free end of the main body, a cap nut is provided to be screwed into the threaded portion, a flange-like projection is provided on the inner surface of the cap-nut, and the flange-like projection and the auxiliary stopper are connected to each other. A pipe joint characterized in that a rubber ring and a pressure ring are disposed between them, and a clamp ring and a clamp nut are housed and screwed together inside the free end of the cap nut. 2. A stopper is provided to protrude into the interior of the cylindrical joint body, and auxiliary stoppers are provided symmetrically on both end sides with the stopper as the center and have the same shape and are lower than the stopper at appropriate intervals, A threaded portion is provided on the outer peripheral surface of the free end of the joint body, and a cap nut is provided to be screwed into the threaded portion,
A flange-like projection is provided on the inner surface of the cap nut, a rubber ring and a pressure ring are disposed between the flange-like projection and the auxiliary stopper, and a clamp ring and a clamp are provided inside the free end of the cap nut. A pipe joint characterized by housing and screwing together a nut.