JPS646468Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to the structure of a pipe joint that allows easy attachment and detachment of flexible pipe bodies (hereinafter referred to as pipe bodies) such as tubes and hoses.

In general, pipe fittings not only require terminal treatment on the pipes to be connected or pressure-fitting of the pipes with great force, but also have the disadvantage that the connection work requires skill and is relatively time-consuming. Ta.

In order to overcome these drawbacks, a relatively easy-to-attach and detachable pipe joint has been proposed that grasps the pipe body on its outer circumferential surface using an annular grasping tool with a plurality of non-return claws provided on the inner circumference side. There is. However, in such pipe fittings, the gripping tool is fixed at a predetermined position in the central through-hole of the main body, so the pipe body may be displaced radially within the through-hole of the main body due to bending, etc., or flattened. Sometimes, the claws of the gripping tool do not bite into the tubular body sufficiently in a part of the outer periphery of the tubular body, and as a result, the gripping of the tubular body becomes unstable and uncertain.

Further, the claws of the gripping tool are inclined inward in the insertion direction of the tube body, and elastically contact the outer peripheral surface of the tube body due to the spring properties of the gripping tool itself, which is made of an elastic metal material such as phosphor bronze, and the tube body is When pressure is applied, the tip part bites into the tube and grips it due to the force acting in the direction of removal of the tube and the force acting outward in the radial direction, so it can be used in low pressure areas. In this case, there was a drawback that the claws did not dig into the outer circumferential surface of the tube, so the tube easily came off.

Therefore, the object of this invention is to provide a pipe joint that can stably and reliably grip the connected pipe bodies and also allows easy attachment and detachment of the pipe bodies. Therefore, according to this invention, there is provided a main body having a central through hole, an O-ring that is placed in the central through hole of the main body and tightly seals the outer periphery of the inserted tube, and a It is elastically locked via a wide leaf spring, connected in a cylindrical shape by an elastic body, and is applied with stress toward the axial center. A collect body consisting of a plurality of gutter-like segments each having an edge portion on the inner circumferential side that allows the tube to be gripped by the main body. A pipe joint is provided with a pusher that releases the edge portion of each segment from biting into the outer periphery of the pipe body against stress toward the axis of the pipe joint, and a support ring that locks this pusher with the end of the through hole of the main body. Configure.

With this structure, the inserted tube can be reliably and stably held by the collector body even when bent or in a low pressure region, and by fitting the pusher into the periphery of the collector body. This provides the effect that the tube body can be easily removed.

The present invention will now be described in more detail with reference to the drawings.

FIG. 1 shows a longitudinal sectional view of a pipe joint 1 according to this invention. In the figure, a pipe joint 1 is formed in a main body 3 having a central through hole 2 in the center. This main body 3
The central through hole 2 has a large diameter on one end 4 and a large diameter on the other end 5.
has a small diameter. In this example, the through hole 2 is stepped from one end side 4 to the other end side 5, but may be tapered.

The other end of the main body 3 is provided with an engaging screw portion 6 that is screwed into a device or the like, and a rotating portion 7 such as a hexagonal nut shape for rotating the main body 3.

An O-ring 8 is installed in the middle of the central through hole 2 of the main body 3.
is supported by the main body 3 in a liquid-tight or air-tight manner.

This O-ring 8 has the function of sealing fluid by coming into close contact with the outer periphery of the tube body 9 fitted into the central through-hole 2 of the pipe joint 1. A collector body 10 is disposed in the upper part of this O-ring 8, which is a plurality of trough-like segments that grip the outer periphery of the tube body 9 and are connected in a cylindrical shape, and a leaf spring 19 is provided at the end of each segment. is locked to the main body 3 by engaging with the support rod 12.

Reference numeral 13 denotes a coil spring as an elastic body provided on the outer periphery of the collector body 10 and applying stress to the collector body 10 toward the axis.

On the upper part of the collector body 10, there is a pusher 15 having a wedge-shaped part 14 at the tip of the opposite part of the collector body.
It is provided concentrically with the tube body 9. pushyah 1
5 is retained and locked to the main body 3 via a support ring 16. This support ring 16 is caulked by a thin caulking portion 17 provided at one end of the through hole of the main body 3.

In this embodiment, the collector body 10 is formed of, for example, a pair, and the collector body segments 18 forming the collector body 10 are constructed as shown in FIGS. 2 to 4. FIG. 2 is a plan view of the collector segment 18, FIG. 3 is a front view thereof, and FIG. 4 is a rear view thereof.

The collector body segment 18 has leaf springs 19 wide in the axial direction at both ends, and a tapered portion 2 at the upper end for receiving the wedge-shaped portion 14 of the pusher 15.
0 is formed. A plurality of (four) edge portions 22 are provided on the circumferential portion 21 of the collector body segment 18, and can grip the tube body 9 by biting into the outer peripheral surface of the tube body 9 from a direction perpendicular to its axis. It's becoming like that. Also, the outer periphery (back side) of the collect body segment 18
Two spring seats 23 for locking the coil spring 13 are provided on the holder.

Instead of providing a coil spring 13 on the outer periphery of the collection body 10 as an elastic body for applying stress toward the axis of the collection body 10, as shown in FIG. A spring body 25 can be used which acts to attract each other. This case is economical because less material is required for the spring body 25. In this case, the case is shown in which there is a pair of collect body segments 24, but it is also possible to form a collect body by three or more collect body segments and arrange a spring body between these collect body segments. However, it is most economical to use a pair of collector fragments.

In the above structure, when installing the tube body 9, the pusher 15 is first attached to the elastic bodies 13 and 2.
5 to the other end (downward in the figure) to push the wedge-shaped part 14 into the inner circumferential side of the collect body 10 to expand the diameter of the collect body 10 and increase the gripping force of the collect body 10. After disabling it, push in the tube body 9. After confirming that the outer periphery of the tubular body 9 has come into close contact with the O-ring 8, the pusher 15 is returned to its original position. The edge portion 22 provided on the surface side bites into the outer peripheral surface of the tube body 9 from a direction perpendicular to its axis. In this way, a large force in the diameter reduction direction by the elastic bodies 13 and 25 is always applied to the collector body 10, and the edge portion 22 is forcibly bitten into the outer peripheral surface of the tube body 9. Compared to conventional gripping tools in which the claws are inclined inward in the direction in which the tube is inserted, the edges can be bitten into the grip more reliably, and the outer periphery of the tube 9 can be securely and stably fixed and held especially in a low pressure region. Here, the collect body 10 is the divided body 18
are elastically locked in the through hole 2 of the main body 3 by leaf springs 19 attached to both ends, so that they can be displaced in the radial direction, and furthermore, each segment 18 has an elastic diameter. Elastic stress is applied toward the axis by the body 13, and the diameter can be expanded freely. Therefore, even if the tube 9 moves radially within the main body due to bending or becomes flattened when used in a movable part, for example, it will reliably follow the tube 9, and the edge portion 22 will be able to keep up with the tube 9. The biting state is always maintained in the best state. Pushya 15
Even if it is near the collection body 10, unless it is press-fitted into the collection body 10 with a force above a certain level,
It does not act to weaken the gripping force of the collector body 10. Note that depending on the elasticity of the elastic bodies 13 and 25 that apply stress in the axial direction to the collector body 10, it is also possible to insert the tube body 9 as it is without pushing the pusher 15.

When removing the tube body 9, press the pusher 15 into the inner peripheral surface of the collector body 10 to remove the collector body 1.
It is only necessary to nullify the gripping force of 0 and then pull out the tubular body 9 manually.

As described above, according to this invention, there is a main body having a central through hole, an O-ring that is placed in the central through hole of the main body and tightly seals the outer periphery of the tube body.
The axial center of the tube is elastically locked in the through hole via a wide leaf spring in the axial direction, and is connected in a cylindrical shape by an elastic body, applying stress toward the axial center and inserted into the tube. A collect body consisting of a plurality of gutter-like segments each having an edge portion on the inner circumferential side that bites in from a direction perpendicular to the tube body and grips the tube body to the main body, between the inner circumference of the collect body and the outer circumference of the tube body A pusher that releases the edge portion of each segment from biting into the outer periphery of the tube body against the stress directed toward the axis of the collector body by fitting, and this pusher is locked to the end of the through hole of the main body. By configuring the pipe joint with a support ring that allows the collet body to move in the radial direction, it hardly moves in the axial direction. Since a large force is applied, the tube body can be gripped reliably and stably under any circumstances, and this gripping force can be easily released by press-fitting the pusher, making it possible to easily attach and detach the tube body. . Therefore, according to this invention, even if the tube body moves in the radial direction, it can be gripped without flattening the tube body, and even in a low pressure region, the tube body can be gripped securely, and it can be easily attached and detached, which has practical value. We can provide high quality pipe fittings.

It should be noted that the present invention is not limited to the above-described embodiment, and it is of course possible to modify and implement the invention within the scope of the concept of the present invention.

[Brief explanation of the drawing]

Figure 1 is a longitudinal sectional view of the pipe joint according to this invention, Figure 2 is a plan view of the collector body segment, Figure 3 is a front view of the collector body segment in Figure 2, and Figure 4 is the same as in Figure 2. FIG. 5 is a rear view of the collector body segment, and a conceptual plan view of a collector body according to another embodiment of this invention. 1: Pipe fitting, 2: Inside the center through hole, 3: Main body,
8: O-ring, 9: Tube body, 10: Collet body, 1
3, 15: Elastic body, 14: Wedge-shaped portion, 15: Pusher, 16: Support ring, 17: Thin wall portion, 1
8, 24: Collet body segment, 19: Leaf spring.

Claims (1)

[Scope of utility model registration request] A main body with a central through-hole, an O-ring that is placed in the central through-hole of the main body and tightly seals the outer periphery of the inserted tube/hose, and a wide leaf spring in the axial direction of the through-hole. The tube hose is elastically locked and connected in a cylindrical shape by an elastic body, applying stress toward the axis, and biting into the outer periphery of the inserted tube hose in a direction perpendicular to the axis, thereby making the tube hose into the main body. A collect body consisting of a plurality of gutter-like segments each having an edge portion on the inner circumferential side for gripping, and by fitting between the periphery of the collector body and the outer periphery of the tube hose, it can be attached to the axis of the collect body. A pipe joint comprising a pusher that releases the edge portion of each segment from biting into the outer periphery of the tube hose against opposing stress, and a support ring that locks the pusher to the end of the through hole of the main body.