JPH0738880U - Pipe fittings and locks for pipe fittings - Google Patents

Abstract

(57) [Abstract] [Purpose] Excellent operability, good workability for separating the first joint pipe and the second joint pipe, and assembling or processing special components on the pipe joint side. It provides a pipe joint that has no general problems and is highly versatile. A first joint pipe 18, a second joint pipe 1 into which the first joint pipe 18 is inserted and which has a nut portion 6, and a movable ring 14 which is movably provided in the second joint pipe 1 in the longitudinal direction. In the pipe joint having the above, a C-shaped lock ring 21 that can be freely attached and detached is provided between the moving ring 14 and the nut portion 6.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pipe joint and a lock device for the pipe joint, which are used for connecting and fixing one pipe with two pipes for transferring a fluid such as air, water, oil, etc. with one touch.

[0002]

[Prior art]

 FIG. 4 shows a conventional pipe joint and locking device. The second joint pipe 100 has a union fitting 102 and a union nut 103 that are screwed together, and the union fitting 102 is joined to the air pipe 101.

Inside the second joint pipe 100, a valve portion A having a valve seat 104, a valve body 105, and a spring 106 is provided. A passage 107 is provided in the valve body 105.

A fixed ring 120 and a rotary ring 121 are attached to the outer periphery of the union nut 103 on the side of the union fitting 102. The rotary ring 121 is rotatable with respect to the union nut 103, and has locking claws 122 provided at predetermined positions in the circumferential direction.

The union nut 103 is provided with a plurality of holes 108 along the circumferential direction, and a locking body, for example, a ball 109 is arranged in the hole 108, and a retaining ring 110 is mounted on the outer periphery thereof. I am doing it.

A moving ring 111 is arranged outside the ball 109 so as to be movable in the longitudinal direction. A spring 112 is attached to the outer periphery of the union nut 103, and urges the moving ring 111 in the longitudinal direction, for example, in the direction of arrow B toward the retaining ring 110 side. A protrusion 115 is provided on the inner circumference of the moving ring 111, and the protrusion 115 comes into contact with the retaining ring 110 and stops.

Inside the union nut 103, a first joint pipe 114 to which an air pipe 113 is connected is inserted. An annular locking groove 115 is provided on the outer circumference of the first joint pipe 114.

The ball 109 sinks into the groove 115, and the moving ring 111 contacts the ball 109 to prevent the ball 109 from moving outward.

A slide ring 123 is provided on the outer periphery of the union nut 103 between the moving ring 11 and the rotating ring 121. A locking groove 124 is provided at a predetermined position in the circumferential direction on the outer circumference of the slide ring 123, and a guide groove 126 is provided on the inner circumference.

A guide 125 provided along the axial direction of the union nut 103 is inserted into the guide groove 126. The slide ring 123 is slidable along the guide 125, and the union nut 103 is guided by the guide 125. Is held non-rotatably against.

A lock member is configured by the lock members such as the rotating ring 121, the slide ring 123, and the guide 125, and the engagement force between the ball 109 and the first joint pipe 114 causes the second joint pipe 100 and the first joint pipe 114 to engage with each other. The joint pipe 114 is connected and fixed.

In the above structure, the locking claw 122 and the locking groove 124 are stopped at different positions on the circumference by the operation of the rotary ring 121 during the transportation of air. Therefore, even if a force that moves the moving ring 111 against the elastic force of the spring 112 in the direction of arrow C is applied, the slide ring 123 comes into contact with the locking claw 122, so that the moving ring 111 moves. The movement is restricted, and the second joint pipe 100 and the first joint pipe 114 are not separated.

On the other hand, the pressing ring 111 is grasped by one hand, and the rotary ring 121 is grasped by the other hand and rotated so that the positions of the locking claw 122 and the locking groove 124 on the circumference coincide with each other. When the pressing ring 111 is moved in the direction of the arrow C in the figure, the slide ring 123 slides and the locking claw 122 is recessed in the locking groove 124, whereby the movement of the pressing ring 111 is secured.

As a result, the ball 109 moves outward along the shape of the groove 115, the engagement force is released, and the second joint pipe 100 and the first joint pipe 114 are separated from each other.

The rotating ring 121 is set to have an inner diameter that produces a predetermined frictional resistance with respect to the outer circumference of the union nut 103 so as not to rotate carelessly.

[0016]

[Problems to be solved by the device]

 The conventional pipe joint has the following problems.

Not only is the rotation work of the rotary ring 121 cumbersome, but when the work is performed in a dark place, the locking claw 122 and the locking groove 124 are difficult to see and the locking claw 122 and the locking groove 124 are aligned with each other. It is difficult to operate and the operability is poor.

Since the rotating ring 121 and the union nut 103 have frictional resistance, when the moving ring 111 is grasped and the rotating ring 121 is rotated, the union nut 103 and the slide ring 123 are driven to rotate, and the engaging claw 122 is engaged. The work of matching with the stop groove 124 cannot be performed. As a result, there is a problem that the workability of separating the second joint pipe 100 and the first joint pipe 114 is reduced.

It is necessary to assemble or process special components on the side of the pipe joint, which increases the manufacturing cost due to an increase in the number of manufacturing steps, and it is not possible to use the existing pipe joint, which makes it versatile. poor.

The present invention is intended to solve the above problems, is excellent in operability, and has good workability of separating the first joint pipe and the second joint pipe, and the existing pipe joint can be used as it is for general-purpose use. It is an object of the present invention to provide a highly efficient pipe joint and a lock for the pipe joint.

[0021]

[Means for Solving the Problems]

 In order to achieve the above object, the invention according to claim 1 provides a first joint pipe, a second joint pipe into which the first joint pipe is inserted, and a nut portion is provided on the outer periphery, and the second joint pipe. A pipe provided on the outer circumference so as to be movable along the longitudinal direction, and having a moving ring for connecting and fixing and releasing the first joint pipe and the second joint pipe by moving in the longitudinal direction. In the joint, a thickness is provided between the nut portion and the moving ring on the outer periphery of the second joint pipe to prevent the moving ring from moving to the position where the fixation is released, and the radial direction is set. Equipped with a C-shaped lock that can be opened and closed.

According to a second aspect of the invention, a nut portion on the outer periphery of the second joint pipe into which the first joint pipe is inserted, and a movable ring provided on the outer periphery of the second joint pipe so as to be movable in the longitudinal direction. The movable ring has a thickness that prevents the movable ring from moving to a position where the first joint pipe and the second joint pipe are unfixed, and is expanded in the radial direction. It has an open C-shaped locking member.

According to a third aspect of the present invention, claws protruding outward are provided at both ends of the lock member.

[0024]

[Action]

 According to the first aspect of the present invention, since the moving amount in the longitudinal direction of the moving ring is restricted by mounting the lock tool on the second joint pipe, even if an external force is applied to the moving ring, the first joint pipe and the second joint pipe. And are connected and fixed.

On the other hand, if the lock tool is removed and the movable ring is moved, the fixation of the first joint pipe and the second joint pipe is released.

Since the lock tool can be mounted and removed by expanding the lock tool, and the lock fitting can be mounted and removed to connect and fix the first joint pipe and the second joint pipe to each other. Does not require any special components or processing.

According to the second aspect of the present invention, if the lock member is attached to the second joint pipe, the movement amount in the longitudinal direction of the moving ring is restricted. Therefore, even if an external force is applied to the moving ring, The second joint pipe is maintained in a connected and fixed state.

On the other hand, if the lock member is removed and the movable ring is moved, the fixation of the first joint pipe and the second joint pipe is released.

The lock member can be installed and removed by expanding the lock member, and the lock member is installed and removed to connect and disconnect the first joint pipe and the second joint pipe. Does not require any special components or processing.

According to the third aspect of the invention, the workability of expanding the lock member is improved by placing the finger on the nail.

[0031]

【Example】

 1 is a front view of a half section showing a pipe joint according to an embodiment of the present invention, FIG. 2 is a perspective view of a lock member used in the present embodiment, and FIG. 3 is a front view of a partial half section showing the operation of FIG. Is.

The second joint pipe 1 has a tubular union fitting 3 inserted into the air pipe 2, and a tubular union nut 4. The air tube 2 is clamped and fixed to the union fitting 3 by a clamp 5, and the union fitting 3 is provided with a nut portion 3A.

Inside the second joint pipe 1, a valve portion having a valve seat 7, a valve body 8 and a spring 9, for example, a check valve D is provided. The valve seat 7 is made of a rubber-like elastic body, and the valve body 8 is provided with a passage 10. The spring 9 presses the valve body 8 toward the valve seat 7.

The union nut 4 is formed by integrally molding a small diameter portion 4A, a large diameter portion 4B and a nut portion 6, and the nut portion 6 is screwed to the union fitting 3. The outer diameter of the large diameter portion 4B is set smaller than the diagonal distance of the nut portion 6.

A plurality of holes 11 are formed through the small diameter portion 4A along the circumferential direction. The hole 11 has a taper shape that narrows inward, and a locking body, for example, a ball 12 is arranged in the hole 11. A retaining ring 13 is attached to an annular groove (not shown) on the outer circumference of the small diameter portion 4A.

On the outside of the ball 12, there is provided a moving ring 14 which is movable in the longitudinal direction from the small diameter portion 4A to the large diameter portion 4B. The inner diameter of the moving ring 14 is set to be larger than the outer diameter of the large diameter portion 4B, and the rib 23 is provided on the inner peripheral surface of the moving ring 14. The inner diameter of the rib 23 is set larger than the outer diameter of the small diameter portion 4A.

A compression spring 15 is interposed between the step portion 4C of the small diameter portion 4A and the large diameter portion 4B and the rib 23, and the elastic force of the compression ring 15 moves the moving ring 14 toward the retaining ring 13 side. It is biased in the direction of arrow E. Then, the rib 23 contacts the retaining ring 13 and the retaining ring 13 is stopped at a predetermined position.

A first joint pipe 18 connected to an air pipe 17 is inserted into the union nut 4. A locking portion, for example, an annular locking groove 19 is provided on the outer circumference of the first joint pipe 18. The air pipe 17 is clamped and fixed to the first joint pipe 18 by a clamp 20.

On the outer periphery of the union nut 4, for example, the large-diameter portion 4B, a lock member that constitutes the lock tool R, for example, a lock ring 21 having a C-shaped planar shape is mounted. The locking ring 21 has a rectangular cross section and has a notch 22 shown in FIG.

The lock ring 21 is made of a material that can be expanded by elastic deformation, such as resin, and can be attached to and detached from the large diameter portion 4B. Further, both ends of the lock ring 21, that is, the portions facing the notches 22 are provided with claws 21A protruding outward.

The inner diameter of the lock ring 21 is set to be substantially the same as the outer diameter of the large diameter portion 4B, and the interval L between the cutout portions 22 is set to be smaller than the outer diameter of the large diameter portion 4B.

The thickness M of the lock ring 21 in the axial direction is determined by the rear of the moving ring 14 in the urging direction with the rib 23 abutting the retaining ring 13 and the moving ring 14 stopped as in the illustrated embodiment. It may be set to a value that abuts both the end portion 24 and the nut portion 6, or the thickness M that forms a slight gap between the rear end portion 24 and the nut portion 6, that is, the retaining ring 13 in the longitudinal direction. It may be set to a value such that the rib 23 does not separate from the ball 12 even if it moves.

In this embodiment, the union fitting 3, the union nut 4, the first joint pipe 18, and the moving ring 14 are made of metal, such as brass, and the ball 12 is also made of metal, such as steel. There is. The air tube 2 and the air tube 17 are made of, for example, soft resin, rubber-like elastic material, or the like. The lock ring 21 may be made of metal, rubber-like elastic material or the like as long as it can be removed from the union nut 4 by expanding.

In the above structure, the moving ring 14 comes into contact with the stop ring 13 and stops, and the ribs 23 restrict the movement of the ball 12 to the outside.

The ball 12 is recessed in the locking groove 19 so that the ball 12 and the first joint pipe 18 are engaged with each other, thereby connecting and fixing the second joint pipe 1 and the first joint pipe 18.

When unillustrated air is pressed into the first joint pipe 18 through the air pipe 17 as indicated by the arrow, the pressure causes the valve body 8 to move to the left side in the figure against the elastic force of the spring 9. Then, the air passes through the passage 10 and reaches the union fitting 3 side.

When the pressure on the air pipe 17 side decreases, the valve body 8 is seated on the valve seat 7 by the elastic force of the spring 9 and the passage 10 is closed, so that the backflow of air from the air pipe 2 is prevented.

Even if an object comes into contact with the moving ring 14 due to maintenance and inspection, dragging of the air pipes 2, 17 or the like, and an external force is applied in the direction of arrow F, the movement of the moving ring 14 is restricted by the lock ring 21. Therefore, the second joint pipe 1 and the first joint pipe 18 are maintained in the connected and fixed state, and air leakage can be prevented.

Further, if the finger is put on the claw 21A and pushed, the lock ring 21 expands and can be detached from the union nut 4. Therefore, as shown in FIG. 3, the moving ring 14 is opposed to the elastic force of the compression spring 15 by the arrow F. Move in the direction. Then, the ribs 23 separate from the balls 12, so when the first joint pipe 18 is pulled to the right in the figure, the balls 12 are pushed outward along the locking grooves 19 to release the engagement force, and the second joint pipe 1 is released. And the first joint pipe 18 are separated. The connection between the second joint pipe 1 and the first joint pipe 18 and the attachment of the lock ring 21 may be carried out in the reverse operation.

In this embodiment, the lock ring 21 can be opened and installed and removed by a simple operation by simply pushing it, and can be easily installed and removed even in a dark place with good operability, and the second joint pipe The workability of releasing the fixation between the first coupling pipe 18 and the first coupling pipe 18 is also good.

Further, since the structure is such that the coupling and fixing and the fixing are released only by attaching and detaching the lock ring 21, the second joint pipe 1 and the first joint pipe 18 do not need to be provided with special components or processing. Good. Therefore, the manufacturing cost of the pipe joint is suppressed, the existing pipe joint can be used as it is, and the versatility is high.

Further, in the present embodiment, if the finger is put on the claw 21A, the lock ring 21 can be easily opened, and the operability is further improved especially when working in a dark place.

Further, a tension spring (not shown) may be used in place of the compression spring 15, and the tension spring may be applied to a pipe joint configured to pull the moving ring 14 in the direction of arrow E in the figure. Elastic bodies may be used.

Further, the locking body may be, for example, a conical shape, and the locking portion may be, for example, grooves scattered in the circumferential direction.

The second joint pipe may be integrally formed as a whole, or the valve portion may be provided inside the first joint pipe. Further, it can be applied to a pipe joint without a valve portion.

The present embodiment can also be applied to a joint between pipes for transferring a liquid such as water or oil or a gas such as gas.

When this embodiment is applied to a faucet for water supply, the shape of the faucet may be the same as that of the first joint pipe 18, and the first joint pipe 18 may be directly connected to the faucet. The air pipe 17 may be indirectly connected to.

[0058]

[Effect of device]

 As described above, the invention according to claim 1 is provided with a thickness between the nut portion and the moving ring on the outer circumference of the second joint pipe to prevent the moving ring from moving to a position where the fixation is released. In addition, a C-shaped locking tool that can be expanded in the radial direction was attached.

Therefore, the locking device can be opened and installed and removed by a simple operation of pushing, and can be easily installed and removed even in a dark place. The workability of releasing the fixation with the one joint pipe is also good.

Further, since the structure is such that the connecting and fixing and the releasing of the fixing are performed only by attaching and detaching the lock tool, it is not necessary to perform special component parts or processing on the pipe joint side. Therefore, the manufacturing cost of the pipe joint is suppressed, the existing pipe joint can be used as it is, and the versatility is high.

According to a second aspect of the invention, the second joint pipe can be attached to and detached from a movable ring provided on the outer periphery of the second joint pipe so as to be movable in the longitudinal direction. The two-joint pipe is provided with a substantially C-shaped lock member that has a thickness that prevents the pipe and the pipe from moving to a position where the pipe is released from the fixed state and that is expandable in the radial direction.

Therefore, the lock member can be opened and installed and removed by a simple operation of pushing, and can be easily installed and removed even in a dark place. Workability of releasing the fixation with the joint pipe is also good.

Further, since the structure is such that the connecting and fixing and the releasing of the fixing are performed only by attaching and detaching the lock member, it is not necessary to perform special component parts or processing on the pipe joint side. Therefore, the manufacturing cost of the pipe joint is suppressed, the existing pipe joint can be used as it is, and the versatility is high.

According to the third aspect of the invention, since the claws protruding outward are provided at both ends of the lock member, it is easy to expand the lock member by putting fingers on the claws, especially in a dark place. When performing, the operability is further improved.

[Brief description of drawings]

FIG. 1 is a front half-section front view showing a pipe joint and a lock tool according to an embodiment of the present invention.

FIG. 2 is a perspective view of the locking device of FIG.

FIG. 3 is a partial front half-sectional view of FIG.

FIG. 4 is a front half cross-sectional view showing a conventional pipe joint and locking device.

[Explanation of symbols]

 1 2nd joint pipe 6 Nut part 14 Moving ring 18 1st joint pipe 21 Lock ring 21A Claw M Thickness R Locking tool

Claims (3)

[Scope of utility model registration request] 1. A first joint pipe, a second joint pipe into which the first joint pipe is inserted, and a nut portion is provided on the outer periphery, and the second joint pipe is freely movable along the longitudinal direction on the outer periphery. In a pipe joint having a moving ring for connecting and fixing and releasing the connection between the first joint pipe and the second joint pipe by moving in the longitudinal direction, in the outer periphery of the second joint pipe. Between the nut portion and the moving ring, a C-shaped locking tool having a thickness that prevents the moving ring from moving to the position where the fixation is released and which is radially expandable is attached. A pipe joint characterized by the following. 2. Mounting and removal between a nut portion on the outer periphery of a second joint pipe into which the first joint pipe is inserted and a moving ring provided on the outer periphery of the second joint pipe so as to be movable along the longitudinal direction. The movable ring has a thickness that prevents the movable ring from moving to a position where the first joint pipe and the second joint pipe are unlocked, and has a substantially C-shape that can be expanded in the radial direction. A locking device for a pipe joint, comprising a locking member. 3. The locking tool for a pipe joint according to claim 2, wherein both ends of the lock member are provided with claws protruding outward.