JPH0523914Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a swingable pipe joint that is applied to swingably connect pipe bodies.

(Prior art) Conventionally, this type of pipe joint has been manufactured by, for example, the
−076515, Jitko No. 54-033134, or Jitsukaisho
There are some published in Publication No. 62-41988, etc. In each of these conventional devices, as shown in FIG. 5 or 6, the convex spherical surface portion 9e of the auxiliary tube body 7e can freely slide spherically within the concave spherical surface portion 4e formed on the inner circumferential surface of the joint body 1e. By fitting it into the auxiliary pipe body 7
e is made swingable with respect to the joint body 1e.

By the way, in the above structure, if only the spherical parts 4e and 9e of the auxiliary pipe body 7e and the joint body 1e are fitted together, the auxiliary pipe body 7e easily comes off from the joint body 1e. We are taking appropriate measures to resolve the issue.

That is, the means shown in FIG. 5 includes a flange 30 provided on the outer periphery of the end of the joint body 1e, and a stopper body 10e for preventing the auxiliary pipe from coming off on the flange 30.
This is a means for attaching the bolts and nuts 31 by means of bolts and nuts 31.

The other means shown in FIG. 6 is to fit the stopper body 10e onto the end of the joint body 1e,
The lock ring 34 is pressed by the push bolt 33 fitted into the groove 32 on the inner periphery of the stopper body 10e.
is fitted into and locked into a groove 35 on the outer periphery of the joint body 1e.

(Problems to be Solved by the Invention) However, with the former conventional means, it is necessary to tighten a large number of bolts and nuts 31 when connecting the joint body 1e and the stopper body 10e. The installation work is very complicated,
This caused difficulties in assembly workability.

Further, by providing a flange 30 having a size that allows tightening of the bolts and nuts 31 on the outer circumferential surface of the joint body 1e corresponding to the position where the convex spherical surface portion 9e of the auxiliary tube body 7e is inserted, This also has the drawback of increasing the size of the entire joint, which is disadvantageous in terms of making it more compact.

On the other hand, the latter method has the advantage that the joint body 1e can be made more compact than the former flange connection method, but when manufacturing it, the concave groove 3
Since a lock ring 34 which can be fitted into the parts 2 and 35 is separately required, the number of parts increases and assembly workability deteriorates.

Moreover, in order to securely and firmly fit and lock the lock ring 34 fitted into the groove 32 of the stopper body 10e into the groove 35 on the side of the joint body 1e, the push bolt 33 must be properly attached to the outer periphery of the stopper body 10e. Since a large number of screw holes must be provided at intervals, the machining work of the screw holes for the push bolts 33 becomes complicated, resulting in a problem that the machining workability and the workability of tightening the push bolts 33 become worse. Ta.

Incidentally, a means for welding the stopper body 10e to the joint body 1e is described in Japanese Utility Model Application Publication No. 62-141988, but according to this method, the pipe joint once assembled cannot be disassembled at will. However, it is not suitable for practical use because it is impossible to replace the packing. Also, the stopper body 1
A method of screwing the stopper body 10e into the joint body 1e may also be considered, but if the diameter of the connecting pipe body is 1 m or more, this method not only makes it difficult to carve the screw, but also makes it difficult to connect the stopper body 10e to the joint body 1e. When tightening to the main body 1e, use the large diameter stopper body 1.
The work of rotating Oe many times becomes even more difficult, and there is a drawback that it cannot be applied to a joint for a large-diameter pipe body.

Therefore, the present invention aims to improve assembly workability and reduce the number of parts without unduly increasing the size of each part of the joint member or regardless of the diameter, so that the auxiliary pipe body can be removed from the joint body. The purpose of this is to appropriately prevent such actions.

(Means for Solving the Problems) The present invention attempts to solve the above conventional problems by directly engaging the stopper body for preventing the auxiliary pipe from coming off and the joint body in a removable state. It is constructed.

That is, in the present invention, a stopper body 10 for preventing the auxiliary tube body 7 having a convex spherical surface part 9 fitted into a concave spherical surface part 4 formed on the inner circumferential surface of the joint body 1 from coming out is provided with a joint. An outer circumferential edge 11 is provided with an inward protruding edge 16 protruding for locking into a groove 13 provided on the outer circumferential surface of the end portion of the main body 1, and the inward protruding edge 16 of the stopper body 10 is connected to a joint. A substantially semicircular arc-shaped stopper piece 10 that can be engaged with the groove 13 of the main body 1 and connect the stopper bodies 10 to each other so that the outer peripheral edge 11 can be externally fitted to the end of the joint main body 1.
It is located at the point where it is divided into two as a and 10a.

(Function) Therefore, in the pipe joint characterized by the above structure, the stopper body 10 is divided into two stopper pieces 10.
If it is divided into two parts a and 10a, the inward protruding edge 16 of the outer peripheral edge 11 is inserted into the groove 13 of the joint body 1.
The stopper body 10 can be externally fitted onto the end of the joint body 1 in a locked state, and the stopper body 10 is brought into contact with the convex spherical surface portion 9 of the auxiliary tube 7 in order to prevent the auxiliary tube 7 from coming off. be able to. Therefore, if the substantially semicircular arc-shaped stopper pieces 10a, 10a are individually fitted onto the joint body 1, the inward projecting edge 1
6 and the concave groove 13 may be easily released and the stopper body 10 may be detached from the joint body 1. If the stopper body 10 is integrated with the auxiliary pipe body 7, its inward protruding edge 16 will no longer touch the joint body 1.
There is no fear that the auxiliary tube body 7 will easily engage and disengage from the groove 13, and the auxiliary tube body 7 can be reliably prevented from coming off.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

In Fig. 1, reference numeral 1 denotes a joint body having a flange 3 at one end for connecting the pipe body 2 to be connected, and a concave spherical surface located deeper than the mounting groove 6 of the packing 5 on the inner peripheral surface of the other end. A portion 4 is formed. Reference numeral 13 denotes an annular groove carved on the outer peripheral surface of the other end of the joint body 1, and one inner surface thereof is formed as a tapered surface 13a. Reference numeral 7 denotes an auxiliary pipe body integrally formed with a convex spherical part 9 that is slidably fitted into the concave spherical part 4 of the joint body 1 at one end, and another pipe body to be connected is formed on the other end side. A flange 8 is provided for connecting 2a.

Reference numeral 10 denotes a stopper body having an approximately U-shaped cross section with an outer circumferential edge 11 and an inner circumferential edge 12, and as shown in FIG. Projection piece 1 protruding from the part
4 and 14 are integrally formed by tightening bolts and nuts 15 and 15, and assembled into an annular shape. 16 is the outer peripheral edge 11 of the stopper body 10
This is an inward protruding edge that protrudes in an annular shape along the inner circumferential surface of the distal end, and the distal end thereof is formed in a rounded shape. 17 is the inner peripheral edge 12 of the stopper body 10
It is formed into a concave spherical part along the convex spherical part 9 of the auxiliary tube body 7 on the inner peripheral surface thereof.

The pipe joint according to this embodiment has the above configuration,
Next, an example of its use will be explained.

First, when assembling it, with the convex spherical surface part 9 of the auxiliary tube body 7 fitted into the concave spherical surface part 4 of the joint body 1, as shown in FIG. upper) stopper piece 10
The inward protruding edge 16 of a is engaged with a portion of the upper part of the groove 13 of the joint body 1. After that, stopper piece 1
0a in the direction of arrow A, the inner circumferential edge 12 of the stopper piece 10a is moved into the joint body 1 as shown in FIG.
can be fitted into the end of the inward projecting edge 1
6 can be locked in the groove 13 all around. The other lower stopper piece 10a can also be externally fitted onto the lower part of the joint body 1 by the same operation as described above.

In this state, the inner circumferential edge 12 of each stopper piece 10a, 10a can be arranged so as to come into contact with the side surface of the convex spherical surface part 9 of the auxiliary tube body 7;
If this continues, there is a risk that each stopper piece 10a, 10a will swing in the direction opposite to the direction of arrow A and easily separate from the joint body 1.

Therefore, in order to solve this problem, the stopper pieces 10a, 10a are fastened together using two bolt nuts 15, 15 as shown in FIG.
a, 10a may be integrally connected as the original annular stopper body 10. Stopper piece 10a, 1
In the state where 0a is connected in a ring and integrated,
There is no longer any fear that the stopper pieces 10a, 10a will swing in the opposite direction to the arrow A direction. Therefore, even if a large withdrawal force acts on the auxiliary tube body 7, this will not cause the inward protruding edge 16 of the stopper body 10 to
There is no possibility that the locked state between the joint body 1 and the concave groove 13 of the joint body 1 will be released. As a result, the auxiliary pipe body 7 can swing freely relative to the joint body 1 while being securely prevented from coming off.

Furthermore, when replacing parts such as the gasket 5 that have been damaged due to use of the joint, it is necessary to remove the stopper body 10 from the joint body 1, but in this work, the two bolts and nuts 15 must be removed, contrary to the assembly work described above. , 15 and remove both stopper pieces 10a, 10.
It can be easily removed from the joint body 1 by simply separating a.

In the above embodiment, bolts and nuts are used as a means for integrally connecting the two divided stopper pieces 10a, 10a, but the present invention is not limited to this. Either side of the projecting pieces 14, 14 may be made into a screw hole and a bolt may be screwed into this screw hole for tightening, and the connection means may be other than bolts or nuts, such as other clamps. It goes without saying that other devices may also be used. In any case, in this invention, a pair of stopper pieces 10
The connection can be easily achieved by tightening the two ends of a and 10a.

Further, the specific shape of the other parts of the stopper body 10 according to the present invention is not limited to the above-mentioned embodiments. For example, the stopper body 10 may have a substantially L-shaped cross section as shown in FIG. There is no problem in that the inner circumferential surface of the body 10 is engaged with the convex spherical surface part 9 of the auxiliary tube body 7 to prevent it from coming off. Also,
Regarding the inward protruding edge 16 of the outer peripheral edge 11, it is also possible to provide the inward protruding edge 16 intermittently, for example.

In short, the stopper body 10 according to the present invention has an outer circumferential edge 11 having an inward protrusion 16 that is engaged with the concave groove 13 of the joint body 1, and the inward protrusion 16 is connected to the concave groove 1.
It is sufficient that the stopper pieces 10a, 10a are divided into two substantially semicircular arc-shaped stopper pieces 10a, which can be connected as integrally as possible so as to be able to be externally attached to the joint body 1 in a state in which the stopper pieces 10a are secured to the joint body 1.

Furthermore, in the pipe joint according to the present invention, the convex spherical surface part 9 of the auxiliary pipe body 7 is constructed separately, or the joint main body 1 is constructed with inner peripheries at both ends as shown in FIG. 5, which is a conventional example. There is no problem even if the two auxiliary pipe bodies are connected by forming a concave spherical part on each surface.

The specific configuration of each part of the auxiliary pipe body 7, the joint body 1, etc. according to the present invention can be freely changed in design within the scope of the present invention, and the specific structure of the joint body and the auxiliary pipe body The connection structure etc. does not matter at all.

(Effect of the invention) As mentioned above, the present invention divides the stopper body into two pieces as a pair of stopper pieces having a substantially semicircular arc shape.
Each stopper piece can be externally fitted onto the joint body with the inward protrusion protruding from the outer peripheral edge of the stopper body being engaged with the groove formed on the outer peripheral surface of the end of the joint body. By integrally connecting the stopper pieces to each other, the stopper pieces can be attached to the joint body in a secure manner to prevent them from coming off. The two stopper pieces are simply fitted onto the ends of the joint body, and the stopper pieces are connected to each other using two bolts and nuts, without having to perform any tightening work on a large number of bolts and nuts. This has resulted in an exceptional effect in that it can be accomplished with a very simple task of just tightening and connecting, and the assembly work can be greatly improved.

Moreover, in the present invention, it is only necessary to provide a concave groove on the outer peripheral surface of the end of the joint body, and to provide an outer peripheral edge that can be fitted externally to the end of the joint body by providing an inward protruding edge on the other stopper body. Therefore, in addition to solving the disadvantages of conventional flange connections, such as increasing the size of the joint body, there are also great practical benefits in that the number of parts is small and it is superior in terms of manufacturability and production cost.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of a joint according to the present invention. Fig. 2 shows the stopper body, and Fig. 2A is a front view, and Fig. 2B is a side view. FIG. 3 is a sectional view of main parts showing a state in the middle of assembly. FIG. 4 is a sectional view of main parts showing another embodiment. FIG. 5 and FIG. 6 are explanatory diagrams showing a conventional example. DESCRIPTION OF SYMBOLS 1... Joint body, 4... Concave spherical surface part, 7... Auxiliary pipe body, 9... Convex spherical surface part, 10... Stopper body, 10a, 10a... Stopper piece, 11...
Outer peripheral edge, 12...Inner peripheral edge, 13...Concave groove, 1
6... Introverted ridge.

Claims (1)

[Scope of utility model registration request] A joint body 1 having a concave spherical surface portion 4 formed on the inner peripheral surface, and a convex spherical surface portion 9 fitted into the concave spherical surface portion 4 of the joint body 1 in a spherical slidable manner, either integrally or separately. an auxiliary tube body 7, and an annular ring for preventing the auxiliary tube body 7 from coming off by coming into contact with the convex spherical surface portion 9 of the auxiliary tube body 7 to prevent the auxiliary tube body 7 from coming off from the joint body 1. In the swingable pipe joints each equipped with a stopper body 10, the stopper body 10 has an inward protrusion 16 for locking into a groove 13 provided on the outer peripheral surface of the end portion of the joint body 1. Projecting outer peripheral edge 1
1, and the outer circumferential edge portion 11 is a substantially semicircular shape that can be freely connected to each other so that the outer peripheral edge portion 11 can be externally fitted onto the end portion of the joint body 1 with the inward protruding edge 16 locked in the groove 13 of the joint body 1. Arc-shaped stopper pieces 10a, 10
A swingable pipe joint characterized in that it is divided into two parts.