JP2000356292A - Detachable tube joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a detachable tube joint prevented from the improvident release of a connected state in the state of completely maintaining the sealing function of a connection part, while allowing the connection part to be freely rotated to release torsion if it is before the pressure of a fluid is applied in the case of torsion being generated to a piping system even after connection, thereby preventing unnecessary force from being applied to a piping. SOLUTION: A coupler inner peripheral surface and an adaptor outer peripheral surface are sealed with an O-ring 50 provided on the inner surface of a coupler, and a slidable locking means 40 is provided between the coupler and an adaptor. The locking means 40 is composed of a slide ring 46 slidable on the adaptor, a locking wedge 41 holdable between the coupler and adaptor, and a control pin P1 for connecting them. The locking wedge 41 is slidable in a wedge receiving vertical groove 25 provided at the adaptor, and the slide ring 46 is always energized in the locking direction by a coil spring S1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a detachable pipe joint for forming a pipe for feeding a fluid such as powder, water, gasoline, air, gas, etc., and more particularly, to a pipe joint attached to an end of a hose or the like. The connection structure of the adapter.

[0002]

2. Description of the Related Art A detachable pipe joint shown in FIG. 4 as an example of a conventional pipe joint has a pipe connecting portion 12 to which one fluid pipe is connected and an arc-shaped convex portion 1 facing an adapter fitting pipe line 13.
8 is connected to a coupler 11 having a pair of rotatable cam arms 17 provided with a gasket 19, and a gasket 19 fixed to a predetermined portion in the conduit 13, and the other fluid pipe is connected and has an annular recess 16. And an adapter 14 having a connecting portion 15. Then, the insertion connecting portion 15 of the adapter 14 is fitted against the elasticity of the gasket 19 provided in the conduit of the coupler 11 so as to be pressed by the distal end surface of the insertion connecting portion 15 of the adapter 14. Then, by rotating the cam arm 17 in a previously opened state (refer to a dotted line position), the arc-shaped convex portion 1 of the cam arm 17 is rotated.
8 is fitted into the annular recess 16 of the adapter 14, and the arm 17 is further rotated so that the vertex of the arc-shaped convex portion, which is the cam, exceeds the point of contact with the annular recess 16. 14 is stably and sufficiently pressed and connected.

[0003]

In the conventional detachable pipe joint, the adapter 14 requires a large pressing force against the elasticity of the gasket 19 at the time of connection.
Moreover, in order to cause the arcuate convex portion 18 of the cam arm 17 to act on the annular concave portion 16 of the adapter 14 while maintaining this pressed state, the cam arm 17 must be rotated with a large force until the top of the cam gets over. In particular, workability in connecting alone is poor. In addition, when the cam arm 17 is easily rotated by an inadvertent external force and is in a connected state, there is a risk that the connection may be inadvertently released due to the restoring force of the gasket 19.

[0004] When the diameter of the pipe joint itself increases, the pressing force on the gasket 19 increases, so that a greater force is required to rotate the cam arm.
In addition, even if the piping system is twisted after the connection, the connection must be released to remove the torsion. Where the connection cannot be released, it is necessary to use an expensive swivel joint or a rotary joint in combination. .

The present invention has been made in view of such problems of the prior art, and inadvertent release of a connection state does not occur in a state where a sealing function of a connection portion is completely maintained, and If the piping system is twisted even after connection,
If the pressure of the fluid is not yet applied, the connecting part can be freely rotated and untwisted, so that unnecessary force is not applied to the piping. It is an object of the present invention to provide a detachable pipe joint.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a joint capable of detachably connecting a coupler and an adapter made of a tubular body, wherein the inner peripheral surface of the coupler and the outer peripheral surface of the adapter are sealed by an O-ring provided on the inner surface of the coupler. And a detachable pipe joint having a slidable locking means between the coupler and the adapter, wherein the locking means comprises a slide ring slidable on the adapter, and a coupler and the adapter. It is composed of a locking wedge that can be clamped between them, and a control pin that connects them. Further, the locking wedge is slidable in a wedge receiving vertical groove provided in the adapter, and is inserted and removed into an annular wedge locking groove provided in the coupler,
The slide ring is always urged in the locking direction by a coil spring. Furthermore, the locking wedge is substantially inverted and has a sloped bottom in the wedge receiving flute for completely receiving the locking wedge. The slide ring of the locking means is provided with a lock pin, and is a detachable pipe joint to be engaged with the restraining means of the adapter.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a side view, partially in section, of the structure of a detachable pipe joint according to an embodiment of the present invention, schematically showing an adapter 20, a coupler 30 and a locking means 40, It is constituted by an O-ring 50 for sealing between the outer peripheral surface of the adapter 20 and the inner peripheral surface of the coupler 30.

FIG. 2 shows in particular the adapter 20 and the locking means 40.
FIG. 3 is a perspective view of a locking wedge 41 forming a part of FIG. 3A, 3B and 3C show the detachable pipe joint of the present invention in relation to the operation of the locking means 40, particularly the locking wedge 41, and the operating position of the slide ring 46. The attachment / detachment action is explained.

FIG. 1 shows that the adapter 20 and the coupler 30
The general structure of is obvious. One end of the adapter 20 has a fluid pipe connecting portion 21 which is a threaded portion connected to a normal fluid pipe, and the other end is fitted into a first receiving portion 32 which is a connecting portion of the coupler 30. The first insertion portion 22 is in contact with the inner peripheral surface. Further, a middle portion of the adapter 20 has a second insertion portion 23 having a diameter larger than the outer diameter of the first insertion portion 22, and a step portion 24 between the first insertion portion 22 and the second insertion portion 23. Is inserted and positioned in abutment with the step 34 of the coupler 30 as described later.

On the other hand, one end of the coupler 30 is similarly connected to a normal fluid pipe or the like, and has a fluid pipe connecting portion 31 which is generally an internal thread portion, followed by the first receiving portion 32 having the smallest inner diameter. Followed by a second, slightly larger inner diameter
A receiving portion 33 is provided, and the adapter 2 is provided between them.
A step 34 is formed to abut the step 24 of the zero. Therefore, when the adapter 20 and the coupler 30 are connected, as shown in FIG. 1, the outer peripheral surface of the first insertion portion 22, the inner peripheral surface of the first receiving portion 32, the outer peripheral surface of the second insertion portion 23, and the second receiving portion At the same time that the inner peripheral surfaces of the portions 33 face each other, the step portions 24 and the step portions 34 are brought into a completely connected state in a state where the step portions 34 and 34 are in contact with each other.

A first feature of the present invention is that the adapter 2
An annular groove 35 is provided in the first receiving portion 32 of the coupler 30 for receiving the O-ring 50, which is the only sealing means at the contact surface between the 0 and the coupler 30. Therefore, in the detachable pipe joint of the present invention, when the locking by the locking means 40 is released,
The engagement force between the adapter 20 and the coupler 30 is O-ring 5
Since the tightening force is only 0, the attachment and detachment of both are extremely easy.

The structure of the locking means 40, which is the second characteristic means of the present invention, will be described with reference to FIGS. First, the most characteristic configuration of the locking means 40 is a locking wedge 41, a wedge receiving vertical groove 25 for guiding the locking wedge 41, and a locking end 42 of the locking wedge 41.
This is the structure of the annular wedge locking groove 36 provided in the inner part of the second receiving portion 33 for inserting and extracting the same. The cross-sectional shape of the annular wedge groove 36 is substantially the same as the cross-sectional shape of the locking end 42 of the locking wedge 41 described later, and the wedge groove has at least an annular substantially V-shaped wall surface. It is desirable that the curvature formed by the upper side surface of the locking end 42 be the same as that of the curved surface, so that in the locking state shown in FIG.
The adapter 20 and the coupler 30 are locked in the axial direction thereof. Further, since the wedge stop groove 36 is formed as an annular groove in the coupler 30, in the pipe joint means of the present invention, the adapter 20 and the coupler 30 remain inserted even after the locking wedge is inserted.
Can rotate freely.

As shown in FIG. 2, the structure of the locking wedge 41 is a wedge body having a substantially inverted shape in a side view. For example, in the case of a pipe joint having an inner diameter of 2 inches, the length is 15 to 30 mm. Width 10-2
It may be a plate having a thickness of about 0 mm and a thickness of about 3 to 7 mm.
The outer surface of the locking wedge 41 has a locking end 42 having an outer peripheral arc surface coinciding with the inner peripheral surface of the annular wedge groove 36 and an outer peripheral arc coincident with the inner peripheral surface of the second receiving portion 33. It comprises a locking intermediate portion 43 having a surface and a driving end portion 44 having a tapered cross section. Reference numeral 45 denotes a control pin P1 described later.
Is a locking screw hole.

As is apparent from FIG. 1, the angle α formed between the inner peripheral surface of the annular wedge retaining groove 36 and the inner peripheral surface of the second receiving portion 33 is related to the upper surface of the locking end 42 of the locking wedge 41. This angle matches the angle formed by the upper surface of the stop intermediate portion 43. A slide ring 46, which is one member of the locking means 40, is located rearward of the second insertion portion 23 of the adapter 20 (on the right side on the paper surface of FIG. 1).
Is slidably fitted into the second insertion portion. The cross section of the slide ring 46 is as shown in FIG. 1, and the inner diameter of the control pin support portion 47 which is the reduced diameter portion in front of the slide ring 46 is substantially equal to the outer diameter of the second insertion portion 23 of the adapter 20. The inner diameter of the rear enlarged portion 48 is substantially equal to the outer diameter of the spring stopper portion 26 of the adapter 20. Therefore, the main portion is provided in the space between the enlarged portion 48 of the slide ring 46 and the second insertion portion 23. The coil spring S1 is housed therein, and the front and rear ends of the spring S1 abut against the control pin support portion 47 and the step portion of the spring stopper 26, respectively. In this way, the main coil spring S1 always urges the locking wedge 41 forward with respect to the adapter 20 via the control pin P1 described later provided on the slide ring 46.

The wedge-receiving vertical groove 25 for movably accommodating the locking wedge 41 is provided on one side in the radial direction of the adapter 20 and most of the axial direction of the second insertion portion 23, as is apparent particularly in FIG. Is provided across. The size of the wedge-receiving vertical groove 25 is such that the locking wedge 41 is slidably accommodated in the axial direction, and the bottom surface of the wedge-receiving vertical groove 25 is, as apparent from FIG. Each of the intermediate portions has a bottom surface 25B inclined downward and forward, and a bottom surface 25C inclined upward and forward.

The inclined bottom surface 25B and the inclined bottom surface 25C
Is formed to be the same as the angle formed by the two inner surfaces of the locking wedge 41 described above, and may be, for example, about 120 degrees. Therefore, as will be described in detail later, when the locking wedge 41 is moved rearward (rightward in the figure) in FIG.
The inner surface corners of the locking wedge 41 that are cut in the inverted shape are completely formed in the inverted U-shaped bottom recess formed by the inclined bottom surface 25B and the inclined bottom surface 25C of the wedge receiving vertical groove 25. It will be stored. Importantly, in the state where the bent portion of the inverted wedge 41 is also received in the concave portion of the inverted bottom surface, all the outer peripheral corners of the engagement wedge 41 are That is, it is located inside the inner peripheral surface of the second receiving portion 33, so that the locking means of the present invention has no influence on the attaching / detaching operation between the adapter 20 and the coupler 30.

The locking means 40 will be further described. The control pin supporting portion 47 of the slide ring 46 has a circumferential position at a position corresponding to the wedge-receiving vertical groove 25 for allowing the control pin P1 to pass therethrough. A hole H1 (see FIG. 2) is provided. And it has a large diameter hole above the hole H1,
A small spring S2 is inserted into the large-diameter hole, and the control pin P
The control pin P1 is always urged upward by engaging with the first head.

On the other hand, a screw portion is provided at the tip of the control pin P1, and the screw portion is connected to the locking screw hole 4 of the locking wedge 41.
5, and the head of the control pin P1 is pushed upward by the elastic force of the small spring S2, whereby the drive end 44 of the locking wedge 41 is moved upward through the control pin P1. Is urged to rotate. Further, in order to make the locking wedge 41 rotatable by the above configuration, the inner diameter of the hole H1 through which the control pin P1 penetrates is made considerably larger than the shaft diameter of the control pin P1, and as shown in FIG. In addition, the tilting movement of the control pin P1 due to the rotation of the locking wedge 41 is freely permitted.

Next, an operation for locking and releasing the adapter 20 and the coupler 30 using the locking means 40 according to the present invention will be described with reference to FIG. FIG. 2A shows a state in which the adapter 20 and the coupler 30 are completely locked by the locking means 40. When the first insertion portion 22 of the adapter 20 is inserted up to the first receiving portion 32 of the coupler 30 and the step portion 24 and the step portion 34 abut in the state of FIG. 1, the slide ring 46 of the locking means 40 becomes the main coil spring. The locking wedge 41 is pressed forward by the elastic force of S1 via the control pin P1, and the locking end 42 is pushed into the annular wedge groove 36 of the coupler 30 and fixed. Therefore, when a force in the direction of separating the adapter 20 and the coupler 30 is applied, the inclined bottom surface 25C, which is the bottom surface of the wedge-receiving vertical groove 25 provided in the second insertion portion 23, presses the inner surface of the locking end 42. , To be pressed and clamped on the inner surface of the annular wedge stopper groove 36,
Thereby, the adapter 20 and the coupler 30 are securely fixed and locked.

To perform the releasing operation of the locking means 40, as shown in FIG. 2B, the slide ring 46 is gradually moved backward, that is, the control pin P1 is moved against the repulsive force of the main coil spring S1. When the wedge 41 is moved to the right in the drawing, the wedge 41 moves in the wedge receiving vertical groove 25 in FIG. 2 while slightly rotating in the counterclockwise direction. When the slide ring 46 is further moved to the right side as shown in FIG. 9C, the locking wedge 41 is further rotated, and the locking end 42 and the bottom surface of the locking intermediate portion 43 are in the wedge-receiving vertical groove. 25, the driving end 44 is rotated as shown in the figure, and the inclined bottom surface 25B and the inclined bottom surface 25C are the same.
The upper inclined surface moves until it comes into contact with the lower end surface of the control pin support 47. Then, as is apparent from FIG. 4C, all the portions outside the locking wedge 41 are located more inside than the inside surface of the second receiving portion 33 of the coupler 30. Therefore, any part of the locking means is no longer
It does not affect the detachment of the adapter 20 and the coupler 30, and the detachment is easily completed simply by separating the O-ring 50 against the resistance force of the tightening force.

Also, naturally, the adapter 20 and the coupler 3
In the case of mounting 0, the operation opposite to the above operation is performed,
First, if the slide ring 46 is moved rightward in the drawing to the state shown in FIG. 4C, the portion from the second receiving portion 33 of the coupler 30 to the first insertion portion 22 of the adapter 20 is completely independent of the locking wedge 41. Then, the second insertion portion 23 can be inserted, and in this case, the resistance at the time of insertion is only the resistance force due to the tightening force of the O-ring 50.

When the adapter 20 and the coupler 30 are connected in the state shown in FIG.
6 is released, the slide ring 46 is released.
Automatically moves to the left due to the repulsive force of the main coil spring S1 and pushes the locking wedge 41 into the annular wedge retaining groove 36 via the control pin P1. And stops in a state where the end of the slide ring 46 is in contact with the end of the second receiving portion 33. Therefore, the adapter 20 and the coupler 30 are locked and fixed as described above.

The locking and releasing operations according to the present invention are as described above, but a restraining means is separately provided to ensure the state shown in FIG. 3A. That is, reference numeral 27 in FIG. 1 denotes an annular restraining groove provided in the second insertion portion 23 of the adapter 20, and a lock pin P2 which can be engaged with the groove.
For example, as shown in the figure, the device is installed at a position shifted from the control pin P1 by about 90 degrees. The lock pin P2 is made of, for example, a small bolt, which is screwed into the restraining groove 27 in the state shown in FIG.
And the axial movement of the coupler 30 can be completely restrained. Further, the restraining groove 27 may be a hole or the like provided at a position corresponding to the lock pin P2 instead of the annular groove. And the present invention relates to the adapter 20 and the coupler 30.
In some cases, the lock pin P2 is set to prevent inadvertent release after locking and fixing, thereby preventing multiple detachment.

[0024]

The detachable pipe joint of the present invention having the above-described structure has an excellent sealing function, and has an O-ring having a small resistance when inserting and connecting the adapter 20 to the coupler 30. The joint is easily rotated even after the locking wedge is inserted, and no abnormal force such as twisting is generated in the connecting portion. Furthermore, when the pressure of the fluid is applied, the locking wedge is fixed to the adapter 20 and the coupler 30 and never comes off by an external force, achieving an excellent effect having all the functions required for the joint. Is what you do.

[Brief description of the drawings]

FIG. 1 is a side view including a partial cross section of a detachable pipe joint according to an embodiment of the present invention.

FIG. 2 is a perspective view of an adapter and a locking wedge shown in FIG. 1;

FIG. 3 is an operation explanatory view of a locking means in the detachable pipe joint of the present invention.

FIG. 4 is a schematic view of a conventional pipe joint.

[Explanation of symbols]

 Reference Signs List 20 Adapter 22 First insertion portion 23 Second insertion portion 25 Receiving vertical groove 25A Horizontal bottom surface 25B Inclined bottom surface 25C Inclined bottom surface 27 Restraining groove 30 Coupler 32 First receiving portion 33 Second receiving portion 35 Annular groove portion 36 Annular wedge groove 40 Engagement groove Stopping means 41 Locking wedge 42 Locking end 43 Locking intermediate portion 44 Driving end 45 Locking screw hole 46 Slide ring 47 Control pin support 50 O-ring P1 Control pin P2 Lock pin S1 Main coil spring S2 Small spring

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[Procedure amendment]

[Submission date] April 26, 2000 (200.4.2
6)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0005

[Correction method] Change

[Correction contents]

[0005] Further, a conventionally known fluid coupling is disclosed in
Hose connection fitting for water faucet such as 1-51276
Means are known. In such a fluid coupling,
Can slide between plug and socket
It has a synthetic resin sleeve and is molded integrally with the sleeve.
Claw member is folded back at the joint with the sleeve.
Of the recesses and guide holes provided in the plug and socket
Connects and disconnects joints by dropping and retracting
Things. However, with this joint
The related structure between the step claw member and the sleeve is extremely complicated.
So, such a structure is manufactured other than molding with synthetic resin
It is almost impossible to do. Therefore, for example, gasoline or gas
Not suitable for joints of feed pipes requiring high airtightness
It is. The present invention has been made in view of such problems of the related art, and inadvertent release of a connection state does not occur in a state where a sealing function of a connection portion is completely maintained, and after connection. Even if there is a torsion in the piping system, the connection part is freely rotated and untwisted before the pressure of the fluid is still applied, and no unnecessary force is applied to the piping,
Moreover, the present invention provides a detachable pipe joint which can be extremely simply and does not require a large force required for a connecting operation. Furthermore, the structure is relatively simple and easy to process.
Suitable for high pressure fluids and joints that require high airtightness
The present invention provides a pipe joint having a locking means.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Change

[Correction contents]

[0006]

SUMMARY OF THE INVENTION The present invention comprises a tubular body.
A coupling that allows the coupler and adapter to be detachably connected.
The O-ring provided on the inner surface of the coupler
The inner peripheral surface of the puller and the outer peripheral surface of the adapter are sealed.
Slidable locking means between the stapler and the adapter
A detachable pipe joint having a configuration having the locking means
Is a slide ring that can slide on the adapter,
A locking wedge that can be clamped between the puller and the adapter,
And a control pin for connecting Further, the locking wedge is slidable in a wedge receiving vertical groove provided in the adapter, and is inserted and removed into an annular wedge locking groove provided in the coupler,
The slide ring is always urged in the locking direction by a coil spring. Furthermore, the locking wedge is substantially inverted and has a sloped bottom in the wedge receiving flute for completely receiving the locking wedge. The slide ring of the locking means is provided with a lock pin, and is a detachable pipe joint to be engaged with the restraining means of the adapter.

Claims (7)

[Claims] 1. A coupling capable of detachably connecting a coupler and an adapter made of a tubular body, wherein an inner peripheral surface of the coupler and an outer peripheral surface of the adapter are sealed by an O-ring provided on an inner surface of the coupler. A detachable pipe joint characterized by having locking means slidable with an adapter. 2. The locking means according to claim 1, wherein the locking means comprises a slide ring slidable on the adapter, a locking wedge squeezable between the coupler and the adapter, and a control pin connecting the two. Detachable type pipe fitting. 3. The locking wedge is slidable in a wedge receiving vertical groove provided in the adapter, and is inserted and removed into an annular wedge locking groove provided in the coupler. Detachable type pipe fitting. 4. The detachable pipe joint according to claim 2, wherein said slide ring is always urged in a locking direction by a coil spring. 5. The locking wedge according to claim 3, wherein the locking wedge has a substantially inverted shape, and the receiving flute has an inclined bottom surface for completely receiving the locking wedge. A detachable pipe joint as described in the above. 6. The detachable pipe joint according to claim 1, wherein a lock pin is provided on a slide ring of the locking means and engages with a restraining means of the adapter. 7. The detachable pipe joint according to claim 6, wherein said restraining means is an annular groove having a U-shaped cross section.