JP2003294185A - Quick pipe disconnect coupling - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem where a retaining clip is opened by rotation of a cover, and pipe connection is accidentally released, in a quick pipe disconnect coupling in a form of performing pipe connection with a retaining clip of elasticity and having the cover for covering the retaining clip from the outside. <P>SOLUTION: The quick pipe disconnect coupling is constructed with a male pipe 48, a socket element 44 serving as a female pipe, the retaining clip 50 installed on the socket element 44 for resilient expansion and contraction in a radial direction and connecting and locking the male pipe 48 and the socket element 44 in a retaining manner in an axial direction while being in a contraction condition, the cover 52 covering the retaining clip from the outside, and detent portions 79, 100 for preventing the cover 52 from rotating with respect to the socket element 44. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a quick pipe joint which enables quick connection of pipes, and more specifically, a female clip and a male pipe are axially coupled and locked by a retaining clip having elasticity to prevent them from coming off. Type of quick fitting.

[0002]

2. Description of the Related Art FIG. 16 shows an example of this type of quick pipe joint.
What is shown in (1) is conventionally known. This example is an example of a pipe joint for connecting a pipe for supplying water or hot water to a faucet device, specifically, a pipe joint for connecting a supply pipe directly connected to the faucet device and its upstream pipe. Is an example of.

In the drawing, reference numeral 200 denotes the faucet device, and 202 is a supply pipe directly connected to the faucet device 200 for supplying water and hot water to the faucet device 200. In this example, supply tube 202 comprises a flexible tube. Reference numeral 204 is a quick pipe joint for connecting the supply pipe 202 and the upstream pipe, and includes a socket member 206 as a female pipe and a retaining clip 208.

FIG. 17 shows the structure of the quick pipe joint 204 in detail. As shown in the figure, the socket member 206 has an insertion opening 212 at one end in the axial direction, and further has a female fitting surface 214 having a circular cross section following the insertion opening 212. A flange portion 216 is formed on the outer peripheral surface at the axial end.

On the other hand, an end member 218 made of a metal fitting is attached to the supply pipe 202. The end member 218 has a male pipe 220, and the male pipe 220 is the socket member 2.
The male fitting surface 222 of the outer peripheral surface is fitted into the female fitting surface 214 of the socket member 206, and the male fitting surface 222 is located between them. The attached O-ring 224 seals in a watertight manner. Male tube 2 here
Also in 20, the same flange portion 216 as in the socket member 206 is formed.

The retaining clip 208 is made of a leaf spring and has a substantially annular shape. The retaining clip 208 has an engaging groove 228 in the middle portion in the width direction and has a notched portion in the circumferential direction. The portion forms an opening 226, and further to the opening 226, a guide portion 230 having an open V shape.
Are continuously formed.

The retaining clip 208 is inserted into the socket member 206 with the male pipe 220, and in a state where the pair of flange portions 216 are fitted together, elastically extends in a direction perpendicular to the axis through the opening 226 with respect to the flange portions 216. The socket member 206 and the supply pipe 202 are coupled and locked in the axial direction by fitting and engaging the flange portions 216 in the engaging groove 228, and are fastened in a retaining state.

[0008]

However, in the case of the quick pipe joint 204, the retaining clip 208 is exposed to the outside, and there is a problem that the appearance and appearance of the pipe connecting portion are poor, and the retaining clip 208 further protrudes. Since it is in a state, there is a risk of injury when accidentally hit by hands during maintenance work, and at that time, the retaining clip 2
There was a problem that 08 might come off.

Therefore, it is possible to cover the retaining clip 208 from the outside. However, in this case, if the cover is rotatable, the retaining clip 208 and the cover interfere with the rotational movement of the cover, and the retaining clip 208 is pushed open as the cover rotates further. There is a risk that the connection with will be disconnected. This problem is particularly likely to occur when the retaining clip has a pair of elastic legs and a connecting portion that connects them at one end side and is mounted in the direction perpendicular to the axis through the opening on the opposite side. This is a problem that can occur even when the clip is in another form.

[0010]

The quick pipe joint of the present invention has been devised to solve such a problem.
Thus, the first aspect of the present invention is a quick pipe joint for connecting pipes, which has (a) a male pipe having a male fitting surface on the outer surface and (b) a female fitting surface on the inner surface. A female tube having an insertion opening at one end in the axial direction, the male tube being inserted through the insertion opening to fit the male fitting surface to the female fitting surface, and (c) mounted on the female tube, A retaining clip that is elastically expandable / contractible in the radial direction and that locks the male tube and the female tube in a contracted state in the axial direction while locking and locking the male tube and the female tube in an expanded state, (D) A cover mounted so as to cover from the outside of the retaining clip, and (e) a detent part that regulates the position of the cover in the direction of rotation with respect to the female tube to prevent the cover from rotating. It is characterized by

According to a second aspect of the present invention, in the first aspect, the detent portion is provided on each of the cover and the female tube and engages with each other, and the detent portion locks the cover by an engaging action. It is characterized by including a face.

A third aspect of the present invention is a quick pipe joint for connecting pipes, which comprises (a) a male pipe having a male fitting surface on the outer surface and (b) a female fitting surface on the inner surface. A female tube having an insertion opening at one end in the axial direction, the male tube being inserted through the insertion opening to fit the male fitting surface to the female fitting surface, and (c) mounted on the female tube, A retaining clip that is elastically expandable / contractible in the radial direction and that locks the male tube and the female tube in a contracted state in the axial direction while locking and locking the male tube and the female tube in an expanded state, (D) A cover mounted so as to cover from the outside of the retaining clip, the female tube including a first portion on the distal end side including a coupling portion of the retaining clip with the male tube, and another portion. And a second part of the second part of the second part are axially divided, and the first part is rotatable with respect to the second part together with the retaining clip. Characterized in that it is a.

According to a fourth aspect of the present invention, in any one of the first to third aspects, the retaining clip has a pair of elastic legs and a connecting portion that connects the elastic legs at one end side. It is characterized in that it is attached to the female pipe or to the female pipe and the male pipe in a direction perpendicular to the axis through an opening on the side opposite to the portion.

According to a fifth aspect of the present invention, in the fourth aspect, the female tube is provided with a cutout portion partially cut out in the circumferential direction, and the cutout clip is provided in the cutout portion in a direction perpendicular to the axis. It is characterized by being installed.

According to a sixth aspect of the present invention, according to any one of the first to fifth aspects, the retaining clip comes into contact with a protruding portion radially protruding from an outer peripheral surface of the male pipe when the male pipe is inserted. Then, a cam portion is provided which, following the insertion movement of the male pipe, causes the retaining clip to expand and to move the protruding portion axially to the retaining position with respect to the retaining clip. And

According to a seventh aspect of the present invention, in the cover according to any one of the first to sixth aspects, the retaining clip is forcibly expanded on the cover to couple the female pipe and the male pipe by the retaining clip. The release operation unit for releasing the is attached in a state of moving relative to the cover and in a state of rotating integrally with the cover.

[0017]

As described above, according to the first aspect of the present invention, a retaining clip for axially coupling and locking a male pipe and a female pipe,
In a quick pipe joint equipped with a cover that covers from the outside of the retaining clip, the quick pipe joint is provided with a detent portion that restricts the position of the cover in the direction of rotation with respect to the female pipe to prevent the cover from rotating. In the case of the quick pipe joint according to claim 1, since the cover is prevented from rotating with respect to the female pipe, the retaining clip is accidentally opened due to the rotational movement of the cover, and the male pipe and the female pipe are unintentionally separated from each other. Can be prevented from being disconnected.

Further, since this quick pipe joint is provided with a cover which covers the retaining clip from the outside thereof, the aesthetic appearance and appearance of the pipe connecting portion can be improved, and
It is possible to prevent accidentally touching the retaining clip with your hands accidentally during maintenance work, etc.Therefore, it is possible to eliminate the risk of your hands contacting the retaining clip and injuring yourself during maintenance work. It is possible to prevent the retaining clip from coming off.

In this case, the detent portion is configured to include an engaging surface provided on each of the cover and the female tube to engage with each other and prevent the cover from rotating by the engaging action. It is possible (claim 2). By doing so, the rotation stopping portion can be easily provided with a simple structure.

The third aspect of the present invention is to prevent the disconnection clip from being opened and disconnection of the male pipe and the female pipe due to this by another means. More specifically, in this claim 3, the female pipe is axially divided into a first portion on the tip side including a connecting portion with the male pipe by the retaining clip and a second portion of the other portion, and The portion can be rotated together with the retaining clip with respect to the second portion.
Also in the above, it is possible to prevent the connection of the male pipe and the female pipe from being unintentionally disconnected by accidentally opening the retaining clip due to the rotation of the cover.

According to the present invention, the retaining clip has a pair of elastic legs and a connecting portion for connecting the pair of elastic legs at one end side, and a female pipe or a female pipe and a male pipe is provided through an opening on the opposite side. The present invention is particularly effective when applied to the case where it is mounted in a direction perpendicular to the axis (claim 4). In the case where the retaining clip is of such a form, the retaining clip is apt to open and move particularly with the rotation of the cover, and therefore, when the present invention is applied to a quick pipe joint including such a retaining clip. Especially effective.

In this case, the female tube may be provided with a notch, and the retaining clip may be attached to the notch in the direction perpendicular to the axis (claim 5). In the present invention, at the time of inserting the male pipe, the male pipe comes into contact with the protruding portion radially protruding from the outer peripheral surface of the male pipe, and the retaining clip is expanded in accordance with the inserting motion of the male pipe, thereby retaining the retaining clip. On the other hand, the retaining clip may be provided with a cam portion that allows the protruding portion to move axially to the retaining position (claim 6).

In this case, when the male pipe is inserted into the female pipe and the pipe is connected, the retaining clip is preliminarily removed from the male pipe and the female pipe as in the conventional quick pipe joint shown in FIGS. It does not have to be removed, or it does not have to be largely retracted in the direction perpendicular to the axis, and the male tube can be easily fitted into the female tube with one touch with the retaining clip in the original mounting position. It is possible to perform the connection work in the disconnection state, and there is an advantage that the work of the pipe connection is easy.

Next, in a seventh aspect of the present invention, a releasing operation portion for forcibly expanding the retaining clip to release the connection between the female pipe and the male pipe by the retaining clip is moved relative to the cover. It is attached to the cover while rotating integrally with the cover.By providing such a release operation part, the connection between the male pipe and the female pipe by the retaining clip can be easily released, and the pipe connection is easy. The male tube can be pulled out from the female tube by unwinding.

On the other hand, when such a releasing operation portion is attached to the cover, the pawls are easily pushed open by the releasing operation portion as the cover rotates, and therefore the present invention provides such releasing operation. The effect is particularly great when applied to the one provided with a part.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment in which the present invention is applied to a connection between a supply pipe for supplying water and hot water to a faucet device and a supply pipe upstream thereof will be described in detail with reference to the drawings.

In FIG. 1, 10 is a faucet device (in this example, a single-lever type hot and cold water mixing faucet) installed on the upper surface of a counter or the like (not shown), 12 is a faucet body, 1
4 is a single lever type operation part provided on the upper part,
Reference numeral 16 is a water discharge pipe extending from the faucet body 12.

The water discharge pipe 16 is composed of a pipe body 18 which is integrally formed with the faucet body 12 and a water discharge head 22 which can be drawn out together with a hose 20. Here spout head 2
2 has a water discharge port 24 at the tip, and water is discharged from the water discharge port 24. In this example, the water spouting head 22 is capable of switching spouting water from rectifying spouting water to shower spouting water or vice versa.

Reference numeral 26 is a supply pipe for supplying water and hot water to the faucet body 12. In this example, the supply pipe 26 is a flexible pipe. The upper ends of the supply pipes 26 are connected to the faucet body 12, and water and hot water are supplied to the faucet body 12 through the supply pipes 26 and 26. The supplied water and hot water are mixed in the faucet body 12 and then flow out to the outflow pipe 28.

The hose 20 is connected to the outflow pipe 28, and the mixed water flowing out to the outflow pipe 28 is guided to the water discharge head 22 through the hose 20. Reference numeral 30 is a hose guide, and 32 is a stopper. The withdrawal amount of the hose 20 is
The stopper 32 is defined by contacting the hose guide 30.

Reference numeral 34 denotes a water and hot water supply pipe, which projects laterally from the wall W toward the inside of the room. These pair of supply pipes 34
A water stopper 36 is provided at the tip of the. Stopcock 36
Has an upward connection port 38. A male screw 40 is formed on the outer surface of the connection port 38. In this example, the supply pipe 26 and the supply pipe 34 are connected to each other by a quick pipe joint 42 of this example.

2 to 7 show the specific construction of the quick pipe joint 42. As shown in FIG. As shown in these figures, the quick pipe joint 42 of the present example is a socket member 44 as a female pipe.
A male pipe 48 provided on the metal end member 46 attached to the end of the supply pipe 26; and an elastic retaining clip 50 (see FIG. 5) which is a separate body from these. And a cover 52. The male pipe 48 has a male fitting surface 54 on the outer surface, and an O-ring 56 for sealing is attached thereto. An outward flange portion (projection portion) 58 is provided at the base end.

On the other hand, the socket member 44 has a female fitting surface 60 into which the male fitting surface 54 is fitted, and an insertion opening 62 at one axial end. Also, the insertion opening 62
A female screw hole 64 is provided at an end portion on the side opposite to the female screw hole 64, and the female screw hole 64 is screwed to the supply pipe 34, more specifically, to the male screw 40 of the connection port 38 of the water stopcock 36. Here, the screw coupling portion between the male screw 40 and the female screw hole 64 is watertightly sealed by a packing 66.

The socket member 44 is provided with a pair of notches 68 formed by notching a part thereof in the circumferential direction in the vicinity of the insertion opening 62, and the retaining clip 5 is provided therein.
0 is installed. Here, both end surfaces of the cutout portion 68 in the axial direction are a first locking surface 70 and a second locking surface 72.

The socket member 44 is also formed with a stopper surface 74 that abuts the flange portion 58 on the male pipe 48 side to regulate the amount of insertion, and further, on the outer surface of the end portion on the female screw hole 64 side, A tool hook 78 is provided as shown in FIGS.

The socket member 44 is also shown in FIGS.
As shown in FIGS. 6, 7 and 10, a stepped portion 77 is provided in the circumferential direction along the outer peripheral surface at a position on the lower side of the cutout portion 68 in the drawings. Furthermore, a pair of parallel engagement surfaces 79 are formed at the upper end in the figure, with a part of the outer peripheral portion cut off.

The retaining clip 50 is formed by bending a leaf spring material into a U shape as shown in detail in FIGS. 5 and 6, and has a pair of elastic legs 80 and a connecting portion for connecting them at one end side. And 82. An end portion on the side opposite to the connecting portion 82 is formed as a fitting opening 83, and further, a fitting guide portion 84 opened in a V shape is formed integrally with the fitting opening 83. . A pair of protrusions 90 are integrally formed at the lower end of the fitting guide portion 84 so as to protrude downward in the drawing, that is, in the axial direction of the socket member 44.

As shown in the enlarged view of FIG. 5, these protrusions 90 are formed on the stepped portion 77 of the socket member 44.
At the same time, it serves as a mounting guide when mounting the retaining clip 50 in the notch 68 of the socket member 44 in the direction perpendicular to the axis.

The retaining clip 50 is provided with a cam portion 92 having a cam surface 94 on each of the pair of elastic legs 80. Here, the cam surface 94 is a mortar-shaped surface that approaches in the axial direction as it advances in the insertion direction of the male pipe 48.

The retaining clip 50 has a fitting opening 83.
It is fitted in the notch 68 of the socket member 44 through the through in the direction perpendicular to the axis and mounted. At this time, as shown in FIGS. 3 and 7, the pair of elastic legs 80 are located in the cutout portion 68, and the front end (lower end in the figure) and rear end (upper end in the figure) of the pair of elastic legs 80 are separated from each other. By contacting the first locking surface 70 and the second locking surface 72 in the cutout portion 68, the position is regulated in the axial direction.

In this example, the cover 52 is made of resin and has a tubular shape as a whole. This cover 5
2, the lower end surface in the drawing is an open shape, the upper end is provided with an inward flange portion 98, and the insertion opening 100 for inserting the male pipe 48 inside the flange portion 98.
Is provided. Reference numeral 96 represents a peripheral wall portion of the cover 52.

This cover 52 has a structure shown in FIGS.
, The elastic claws 102 are integrally provided. By elastically locking the elastic claws 102 to the lower surface of the stepped portion 77 of the socket member 44, the cover 52 is provided. It is adapted to be attached to and detached from 44.

As shown in FIGS. 4, 6, 9 and 11, the cover 52 also has a pair of fitting pieces 104, 106 each having an arc shape at a position spaced inward from the peripheral wall portion 96.
Are integrally formed. These mating pieces 104, 106
When the cover 52 is fitted in the socket member 44 in the axial direction, the cover 52 is fitted on the outer peripheral surface of the socket member 44 to perform the fitting guide while positioning in the direction perpendicular to the axis. That is, in this example, the pair of fitting pieces 104, 106
Form a fitting guide for the cover 52.

Here, the pair of fitting pieces 104, 106 are formed integrally with the cover 52 so as to extend in the axial direction which is the fitting direction of the cover 52, and one fitting piece 106 is also provided.
The both ends in the circumferential direction are connected to the peripheral wall portion 96 of the cover 52 at the connecting portions 108.

As shown in FIG. 9, the cover 52 includes
At the position corresponding to the engagement surface 79 of the socket member 44, the flat engagement surface 11 having a cut-out shape with a corresponding shape is formed.
0 and 112 are formed on the flange portion 98 side. These engaging surfaces 110 and 112 are under the mounted state of the cover 52 as clearly shown in FIG.
By engaging with the pair of engaging surfaces 79, the position of the cover 52 in the rotation direction with respect to the socket member 44 is regulated, and the rotation is prevented.

That is, in this example, the pair of engaging surfaces 79 of the socket member 44 and the pair of engaging surfaces 110, 11 of the cover 52 are provided.
Reference numeral 2 forms a rotation stopping portion that restricts the position of the cover 52 in the rotation direction with respect to the socket member 44 and stops the rotation.

As clearly shown in FIG. 5, FIG. 6, FIG. 8 and FIG. 11, the cover 52 is provided with a penetrating window portion 114 in its peripheral wall portion 96, and the release window portion 114 is provided therein. The button (release operation portion) 116 is mounted in the fitted state.

Here, the release button 116 expands the pair of elastic legs 80 of the retaining clip 50 by pushing operation to release the coupling lock between the socket member 44 and the male pipe 48 on the supply pipe 26 side by the retaining clip 50. It is for doing. The release button 116 is entirely made of resin and has a different color from the cover 52. The release button 116 has an operation force input unit 118,
It is pushed into the cover 52 based on the operation force applied thereto.

This release button 116 has the buttons shown in FIGS.
14, a release cam portion 122 having a cam surface 120 is provided, and by pushing the release button 116, the retaining clip 50 is fitted by the cam action of the cam surface 120 as shown in FIG. The opening 83 is pushed open, whereby the retaining clip 50 is expanded and opened, and the retaining clip 50 releases the coupling lock between the socket member 44 and the male pipe 48.

At this time, the release button 116 and the cover 52 are provided with guide portions for guiding the movement of the release button 116 so that the release button 116 can slide smoothly and in parallel without tilting. . More specifically, as shown in FIGS. 5, 6 and 8, the release button 116 is provided with a guide protrusion (guide protrusion) 124 and a guide groove (guide recess) 126 protruding in the left-right direction, and a cover. A guide groove (guide recess) 128 and a guide protrusion (guide protrusion) 130 are provided at positions corresponding to 52, and the guide protrusion 124 of the release button 116.
The guide groove 128 in the cover 52, the guide groove 126 in the release button 116, and the guide protrusion 130 in the cover 52 are slidably fitted in the movement direction of the release button 116.

The release button 116 smoothly slides in and out of the cover 52 based on these guides.
The release button 116 is provided with a hook portion 132, and the hook portion 132 is hooked on a hook portion 134 provided on the cover 52 side to prevent the release button 116 from coming off the cover 52. .

Next, the procedure for connecting and disconnecting pipes using the quick pipe joint 42 of this embodiment will be described in detail below together with the operation of the quick pipe joint 42. In this example, first, the socket member 44 is connected to the connection port 38 of the supply pipe 34, and then the retaining clip 50 and the cover 52 are attached to the socket member 44.
Be attached. FIG. 12 (I) shows this state.

At this time, the cover 52 mounted on the socket member 44 is in a state where the pair of engaging surfaces 79 of the socket member 44 and the pair of engaging surfaces 110, 112 of the cover 52 are engaged with each other. The position of the member 44 is regulated in the rotational direction, and the member 44 is stopped.

In this state, as shown in FIGS. 12 (I) and (II), the end member 46 attached to the end of the supply pipe 26, more specifically the male pipe 48, is inserted into the insertion opening 100 of the cover 52.
And, it is inserted into the socket member 44 through the insertion opening 62 of the socket member 44. At this time, when the flange portion 58 of the male tube 48 comes into contact with the cam surface 94 of the retaining clip 50 during the insertion process, and the male tube 48 is further inserted, the cam action of the cam surface 94 is driven by this. Retaining clip 50
The pair of elastic legs 80 are expanded to allow the flange portion 58 to pass through the retaining clip 50.

The flange portion 58 has a retaining clip 50.
After passing through, and coming into contact with the stopper surface 74 of the socket member 44, the retaining clip 50 contracts based on its own elastic force, and the front end (lower end in the drawing) of the elastic leg 80 abuts the flange portion 58. It becomes a state. Male pipe 48 here
Are prevented from coming off from the socket member 44. That is, male pipe 48
Is coupled and locked to the socket member 44 by the retaining clip 50 in the retaining state. FIG. 12 (III) shows the state at this time.

In FIGS. 13 and 14, the male tube 48 connected to the socket member 44 in this manner is shown in FIG.
It shows the procedure and action when extracting from. Male pipe 48
13 to disconnect the socket from the socket member 44.
As shown in FIGS. 13 (II) and 14 (II), the release button 116 in the state (I) is pushed toward the inside of the socket member 44 in the direction perpendicular to the axis.

At this time, the release button 116 originally in the state of FIG. 14 (I) is pushed into the cover 52, so that the release cam portion 122 of the release button 116.
The cam action of the cam surface 120 causes the retaining clip 50 to expand and unlock the male pipe 48. Here, the male pipe 48 becomes movable with respect to the socket member 44 in the pull-out direction. Then, when a force is applied in the pulling direction with the supply pipe 26, the male pipe 48 is pulled out from the socket member 44 as shown in FIG.
At this point, the connection between the socket member 44 and the male pipe 48 is released.

In the rapid pipe joint 42 of the present embodiment as described above, the pipe connection portion is wrapped with the retaining clip 50 from the outside by the cover 52 to be concealed inside, so that the aesthetic appearance and appearance of the pipe connection portion can be well maintained. can do. In addition, when performing maintenance work, accidentally prevent the hands etc.
There is no risk of being injured by hitting it, and at that time, the retaining clip 50 is erroneously attached to the socket member 44 and the male pipe 48.
It has the advantage that there is no danger of it coming off.

In addition, in this example, the retaining clip 50
Has a cam portion 92 for connecting the male pipe 48 to the socket member 4
4, the retaining clip 50 automatically expands due to the action of the cam portion 92. Therefore, with the retaining clip 50 and the cover 52 attached to the socket member 44, the male pipe 48 is simply inserted. It is possible to easily and automatically connect to the socket member 44.

That is, when connecting the male pipe 48 to the socket member 44, it is not necessary to remove the cover 52 and the retaining clip 50 from the mounting position in advance. As it is, the pipe connection can be performed simply by pushing the male pipe 48 in the axial direction.

In this embodiment, the male pipe 48 is connected to the socket member 4
Even when pulling out from 4, i.e., when disconnecting the pipe connection, without removing the retaining clip 50 and the cover 52 from the mounting position, it is possible to simply push the release button 116 while keeping the mounting state and the male member is simply pushed. The connection between the pipe 48 and the socket member 44 can be released.

In addition, the quick pipe joint 40 of this embodiment has a cover 52.
The retaining clip 50 on the inner side of the socket 4
4 and the male pipe 48 are axially coupled and locked, that is, although the female pipe 44 and the male pipe 48 are axially connected, the cover 52 is attached to the socket member 44. On the other hand, since rotation is prevented by the detent portion composed of the pair of engagement surfaces 79 on the socket member 44 side and the pair of engagement surfaces 110, 112 on the cover 52 side, the rotational movement of the cover 52 with respect to the socket member 44 is prevented. Accordingly, it is possible to reliably prevent the retaining clip 50 from being accidentally opened and the male tube 48 and the socket member 44 from being unintentionally disconnected.

In this embodiment, the release button 116 is attached to the cover 52 in a state of being integrally rotated with the cover 52. Therefore, if the cover 52 is rotatable with respect to the socket member 44 and the retaining clip 50, the cover 52 is rotated. 52
The release button 116 causes the retaining clip 5 to
However, since the cover 52 is fixed to the socket member 44 in this example as described above, even if the cover 52 is provided with such a release button 116, as described above. Regardless, it is possible to reliably prevent the release button 116 from causing the retaining clip 50 to expand when the cover 52 rotates.

FIG. 15 shows another embodiment of the present invention. In this example, the socket member 44 is attached to the first portion 4 on the tip side.
4-1 and the second portion 44-2 of the other portion have an axially divided structure, and they are axially connected to each other so as to be rotatable relative to each other to form the entire socket member 44.

Here, the first portion 44-1 and the second portion 44-2 are prevented from coming off in the axial direction by the ring-shaped steel wire 136. The steel wire 136 includes a first portion 44-1 and a second portion 44-2.
And are accommodated in a space between the annular grooves 138 and 140 formed in the respective.

In the case of this example of FIG. 15, the first portion 44-1 rotates with respect to the second portion 44-2, so that the cover 52 causes the retaining clip 50 to fasten the socket member 44 and the male pipe 48 together. On the other hand, in detail, relative rotation with respect to the first portion 44-1 of the socket member 44 to which the retaining clip 50 is attached is prevented, and therefore in this example also, the cover 52 rotates to prevent accidental retaining. The clip 50 is opened, and the male pipe 48 and the socket member 44
It is possible to prevent the connection with the connection from being accidentally disconnected.

Although the embodiment of the present invention has been described in detail above, this is merely an example. For example, the present invention can be applied to the quick fitting 204 having the retaining clip 208 shown in FIGS. 16 and 17 as the retaining clip. Further, in the above example, the retaining clip 50 is formed separately from the socket member 44, but in some cases, the retaining clip 50 may be formed integrally with the socket member 44, that is, with the female tube.

Furthermore, a cam portion is provided on the retaining clip 208 of the form shown in FIGS. 16 and 17, and when the male pipe 48 is inserted, the action of the cam portion causes the retaining clip to expand. It is also possible in some cases.
Others The present invention can be configured in a form in which various changes are made without departing from the spirit of the invention.

[Brief description of drawings]

FIG. 1 is a view showing a quick pipe joint of one embodiment of the present invention together with its application target.

FIG. 2 is an enlarged perspective view showing the quick pipe joint of the embodiment in a pipe connected state.

FIG. 3 is an enlarged vertical sectional view of the quick pipe joint of the embodiment in a pipe connected state.

FIG. 4 is a lateral cross-sectional view showing an enlarged view of the quick pipe joint of the embodiment in a pipe connected state.

FIG. 5 is a perspective view from above diagonally showing the quick pipe joint of the same embodiment disassembled into respective members.

FIG. 6 is a perspective view from obliquely below showing the quick pipe joint of the same embodiment in an exploded manner into each member.

FIG. 7 is a vertical cross-sectional view showing the quick pipe joint of the same embodiment exploded into each member.

FIG. 8 is a perspective view showing a cover and a release button of the quick pipe joint of the same embodiment taken out.

9 is a perspective view of the cover of FIG. 8. FIG.

FIG. 10 is a single piece view of the socket member of the quick pipe joint of the same embodiment.

FIG. 11 is a single piece view of the cover of the quick pipe joint of the same embodiment.

FIG. 12 is an operation explanatory view of the quick pipe joint of the same embodiment.

FIG. 13 is an explanatory diagram showing an operating method for releasing the pipe connection of the quick pipe joint of the embodiment.

FIG. 14 is an operation explanatory view of the release button of the quick pipe joint of the embodiment.

FIG. 15 is a cross-sectional view of a quick fitting according to another embodiment of the present invention.

FIG. 16 is a view showing a conventional quick pipe joint together with its application target.

FIG. 17 is an enlarged view showing the quick pipe joint of FIG. 15.

[Explanation of symbols]

42 quick fittings 44 Socket member (female tube) 44-1 First part 44-2 Second part 48 male tube 50 retaining clip 52 cover 54 Male mating surface 58 Flange (projection) 60 female mating surface 62,100 insertion opening 79, 110, 112 Engaging surface 80 elastic legs 82 Connection 83 Fitting opening 92 Cam surface 116 Release button (release operation section)

Claims (7)

[Claims] 1. A quick pipe joint for connecting pipes, comprising: (a) a male pipe having a male fitting surface on the outer surface, (b) a female fitting surface on the inner surface, and an insertion opening at one end in the axial direction. A female tube having the male tube inserted through the insertion opening to fit the male fitting surface to the female fitting surface; and (c) being attached to the female tube and elastically expanding in the radial direction. A retractable clip that can be opened and contracted and locks the male tube and the female tube in the retracted state in the retracted state in the contracted state, while releasing the lock in the expanded state and (d) the outside of the retaining clip. A quick pipe characterized in that it has a cover mounted in a state of being covered from above, and (e) a rotation stopping portion for restricting the rotational position of the cover with respect to the female pipe to prevent the cover from rotating. Fittings. 2. The detent portion according to claim 1, wherein the detent portion includes an engagement surface provided on each of the cover and the female pipe to engage with each other and to prevent the cover from rotating by an engaging action. A quick fitting that is characterized by that. 3. A quick pipe joint for connecting pipes, comprising: (a) a male pipe having a male fitting surface on the outer surface, (b) a female fitting surface on the inner surface, and an insertion opening at one end in the axial direction. And a female tube for inserting the male tube through the insertion opening to fit the male fitting surface to the female fitting surface, and (c) mounted on the female tube and elastically expanding in the radial direction. From the outside of the retaining clip and (d) the retaining clip that is contractible and that locks the male tube and the female tube in the contracted state in the axial direction while locking and locking the male tube and the retaining tube in the expanded state. And a cover attached to cover the female pipe, and the female pipe has a first portion on the tip side including a coupling portion with the male pipe by the retaining clip and a second portion of the other portion in the axial direction. It has a divided structure, and the first portion is rotatable with respect to the second portion together with the retaining clip. Quick fitting that. 4. The retaining clip according to claim 1, wherein the retaining clip includes a pair of elastic legs and a connecting portion that connects the elastic legs at one end side, and the side opposite to the connecting portion. A quick pipe joint, which is attached to the female pipe or to the female pipe and the male pipe through an opening of the same in a direction perpendicular to the axis. 5. The cutout according to claim 4, wherein the female pipe is provided with a cutout part of which is cut out in the circumferential direction, and the retaining clip is attached to the cutout in a direction perpendicular to the axis. Quick fittings featuring. 6. The male pipe according to claim 1, wherein the retaining clip comes into contact with a protruding portion radially protruding from an outer peripheral surface of the male pipe when the male pipe is inserted. A quick pipe joint is provided with a cam portion for expanding the retaining clip in accordance with the insertion movement of the retainer and allowing the protrusion to move axially to the retaining position with respect to the retaining clip. . 7. The releasing operation according to claim 1, wherein the retaining clip is forcibly expanded on the cover to release the coupling between the female pipe and the male pipe by the retaining clip. A quick fitting, wherein the part is mounted so as to move relative to the cover and to rotate integrally with the cover.