JPH07145896A - Pipe coupling - Google Patents

Abstract

PURPOSE:To perform mounting and demounting through one action as the structure of coupling members at two ends forms simple structure wherein a male type and a female type are not distinguished from each other and to provide a high mechanical strength. CONSTITUTION:A pipe coupling comprises a pair of cylindrical coupling members 2A and 2B and a protrusion part 4 protruded radially outwardly on a semiperiphery on the outer peripheral side and a radially outwardly recessed engaging groove 5 on the inner peripheral side of a remaining semiperiphery and in a position offset radially outwardly are formed in the ends in an axial direction of the coupling members 2A and 2B. The protrusion 4 and the engaging groove 5 of the two coupling members 2A and 2B are removed from each other through radial relative movement.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint for pipes such as hoses, tubes and pipes, and more particularly to a pipe joint which can be attached and detached with one touch.

[0002]

2. Description of the Related Art In many cases, pipe joints are used as means for connecting pipe ends such as hoses, tubes, and pipes for transporting fluids and powders, or for connecting these pipes with instruments such as valves. ing. As a typical example of such a pipe joint, a flange is attached to each of a pair of joint members, and a connection structure in which the two flanges are tightened and fixed by bolts, or a male screw is processed on one of the pair of joint members, and the other is formed on the other. There is a connection structure in which a female screw is processed and the two are screwed together.

However, all of these pipe joints have a drawback that they cannot be quickly attached and detached because they must be tightened by rotating a screw a number of times. Further, there is a drawback that a wide open space is required around the pipe joint for attachment and detachment work, and the pipe joint cannot be installed in a narrow space. In order to solve such problems of attachment / detachment time and work space, one side of a joint member is provided with a retractable pawl urged by a spring as a male type, and the other side is provided with an engaging recess for engaging the pawl. It has been proposed that a structure is provided which is provided as a mold and is attached and detached by one-touch by relatively moving both joint members in the axial direction.

However, in this pipe joint, since one joint member is male and the other joint member is female, the male joint member and the female joint member must be opposed to each other for connection. Need to be placed. Therefore, if the male joint members or the female joint members face each other, connection is impossible. Therefore, in the case of applications such as connecting multiple hoses at a fire site, such as fire hoses,
If some of the hoses are erroneously arranged so that the joint members of the same type face each other, there is a drawback that a quick connection work cannot be performed.

Further, since the pipe joint using the above spring mechanism has a complicated structure, it is expensive and heavy, and has a drawback that it becomes difficult to handle when it has a large diameter. Further, there is also a drawback that the mechanical strength cannot be high because the structure is complicated.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to enable the attachment / detachment with one touch and to have a large mechanical strength while making the structure of the joint members at both ends into a simple same structure without distinction between a male type and a female type. It is to provide a pipe joint that makes it possible to obtain.

[0007]

The pipe joint of the present invention which achieves the above object comprises a pair of tubular joint members, and the axial ends of these joint members are radially outward on the outer circumference side half circumferences. And a engaging groove recessed radially outward at a position axially outwardly offset from the protrusion on the inner peripheral side of the remaining half circumference, and the protrusion and the engaging groove of both joint members are provided in the radial direction. It is characterized in that they can be attached to and detached from each other by relative movement to.

As described above, since both joint members have the same joint structure, a half-circumferential projection is provided on the outer peripheral side of each end and an engaging groove is provided on the inner peripheral side of the remaining half-circumference. There is no directivity of the female type, and connection is possible regardless of which end is opposed. Moreover, in the connecting operation, the protrusion and the engaging groove can be fitted only by moving the ends of both joint members relative to each other in the radial direction. Therefore, it is possible to attach and detach with one touch without requiring a large working space.

Further, since the mechanism is simple, a large mechanical strength can be obtained without increasing the size and the weight can be reduced. When the projection and the engaging groove are fitted to each other, the movement in the axial direction is restricted, but the force of the fluid or the like during transportation in the pipe mainly acts only in the axial direction. Enables secure fixing.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in the drawings. 1 is a sectional view showing a pipe joint according to an embodiment of the present invention in a connected state, and FIG. 2 is a side view showing its appearance. 1 and 2, reference numeral 1 denotes a pipe joint according to the present invention, which is a pair of tubular joint members 2A and 2B.
It is composed of a combination of. A pair of joint members 2A, 2
B has a joint structure as described below at axially opposite end portions thereof, and is detachably connected with a packing 3 interposed therebetween. Each joint member 2A,
The ends of the pipes 10 (hoses, tubes, pipes, etc.), which are the objects to be connected, are attached to 2B. Here, the attachment means of the pipe 10 to the joint members 2A and 2B is not particularly limited, and any attachment means conventionally used can be used.

As the material of the joint members 2A and 2B, any of the materials used for conventional joints can be used. In particular, metals such as steel, phosphor bronze, and aluminum alloy can be used, and also resins can be used. In the case of resin, it is preferable to use fiber reinforced resin. On the outer circumferences of both joint members 2A and 2B, gripping caps 7,
7 is mounted so as to be movable in the axial direction. As shown by the chain line in FIG. 2, one of the gripping caps 7, 7 is moved after connecting the joint members 2A, 2B to protect the connection surface. A protective cover 8 is attached to the outer circumference of each of the joint members 2A and 2B to protect the connection surface with the pipe 10.

The packing 3, gripping cap 7, and protective cover 8 provided in the above-described embodiment are not always necessary in the present invention, and may be omitted depending on the use of the pipe. In the present invention, the joint member 2
The joint structures formed in A and 2B have the same structure as shown in FIGS. 3A and 3B for both joint members. Each of the joint members 2A and 2B has a semi-annular projection 4 and an engaging groove 5 which are formed by separating the semi-annular projection 4 and the engaging groove 5 from each other at one axial end. Of these, a semi-annular protrusion 4
Is formed so as to project outward in the radial direction over a half circumference on the outer peripheral side of the end portion. In addition, the semi-annular engagement groove 5
Is formed so as to be recessed inside the flange portion 6 that protrudes outward in a semi-annular shape on the inner peripheral side of the end portion of the remaining half circumference.

The projection 4 and the engaging groove 5 are arranged so as to be offset from each other in the axial direction, and the engaging groove 5 is located outside the projection 4 in the axial direction. The outer diameter of the protrusion 4 is approximately equal to the inner diameter of the groove 5, and preferably the outer diameter of the protrusion 4 is slightly smaller than the inner diameter of the groove 5. With such a configuration, the projections 4 provided on the joint members 2A and 2B respectively fit into the engagement grooves 5 provided on the joint members 2A and 2B on the other side.

The joint members 2A, 2 constructed as described above
To attach and detach B, the procedure shown in FIG. 4 may be performed.
That is, as shown by the solid line in FIG.
The ends of A and 2B are offset from each other in the axial direction in parallel with each other, and the protrusions 4 and the engaging grooves 5 are opposed to each other in the radial direction. From this state, the joint member 2B is moved in the radial direction toward the joint member 2A as indicated by the arrow. Of course, this movement may be performed relatively, and the joint member 2A may be directed toward the joint member 2B, or both joint members 2A and 2B may be moved at the same time.

By the relative movement of the joint members 2A and 2B in the radial direction, the projections 4 and 4 of each joint member are fitted into the engaging grooves 5 and 5 of the other joint member, so that both joint members are connected with one touch. can do. Moreover, the pipe joint can be attached and detached only by providing a little attachment and detachment work space on one side. Further, since the joint members 2A and 2B have the same structure and there is no distinction between a male type and a female type unlike a conventional joint, no matter which end is facing, quick connection can be made with one touch. be able to.

Further, since the pipe joint has a simple structure in which the projections 4 and the engaging grooves 5 are formed on the joint member at every half circumference, the pipe joint can be made lightweight and have a large mechanical strength. Further, the connection by the pipe joint restrains the movement in the axial direction because the projection 4 extending in the radial direction and the engagement groove 5 are fitted to each other. Meanwhile, from the transport fluid to the joint member 2
The forces acting on A and 2B are substantially only in the axial direction,
Since it does not act in the radial direction, the axial restraint enables a reliable connection.

The force for separating the joint members 2A and 2B from each other according to the present invention is generated only from the fluid pressure acting in the axial direction from the inside. This fluid pressure is, as described above, the projection 4 and the engaging groove. It is surely prevented by fitting with 5. If an unexpected force is applied to the joint members 2A and 2B from the outside in the radial direction, the joint members 2A and 2B may be pulled apart. However, such an unexpected accident is caused by the gripping cap 7 as described in the embodiment. It can be avoided by holding the connection by. Further, when it is necessary to protect the connection surface between the pipe joint and the pipe, it is advisable to attach the protective cover 8 as exemplified in the embodiment.

The pipe joint of the present invention can be used as a connecting means for pipes such as hoses, tubes and pipes used for industrial or household use, and these pipes can be connected to other devices such as valves. It can also be used as a connecting means between them. Further, the object to be transported by the hose, tube, pipe, etc. connected by the pipe joint of the present invention is not limited to fluid such as liquid or gas, but can be applied to powder or granular material.

[0019]

As described above, in the pipe joint of the present invention, the joint structure of both joint members is composed of the projections provided on the outer peripheral side of the half circumference of the end portions and the engagement grooves provided on the inner peripheral side of the remaining half circumference. Since they have the same structure, there is no male or female orientation between them, and quick connection is possible even if either end is opposed. Moreover, in the connecting work, the projections and the engaging grooves are fitted only by moving the ends of both joint members in the radial direction relative to each other, and the one-touch attachment / detachment is possible without requiring a large working space. Further, since the mechanism is simple, a large mechanical strength can be obtained without increasing the size and the weight can be reduced.

[Brief description of drawings]

FIG. 1 is a sectional view showing a pipe joint according to an embodiment of the present invention in a connected state.

FIG. 2 is a side view showing the external appearance of the pipe joint of FIG.

FIG. 3 (A) is a cross-sectional view showing an example of a joint member constituting the pipe joint of the present invention, and FIG. 3 (B) is a front view thereof.

FIG. 4 is an explanatory view showing a connecting operation by the pipe joint of the present invention.

[Explanation of symbols]

 1 Pipe Joint 2A, 2B Joint Member 4 Protrusion 5 Engagement Groove 10 Pipe (Hose, Tube, Pipe)

Claims (1)

[Claims] 1. A pair of cylindrical joint members, each of which has an axial end portion having a projection protruding radially outward on a half circumference on the outer peripheral side, and a projection on the inner peripheral side of the remaining half circumference from the projection. A pipe joint in which an engagement groove recessed outward in the radial direction is provided at a position offset outward in the axial direction, and the projection and the engagement groove of both joint members are detachably attached to each other by relative movement in the radial direction.