JP2001324075A - Rapid pipe joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rapid pipe joint with good appearance in a pipe connecting part allowing rapid pipe connection in a single operation. SOLUTION: This rapid pipe joint 10 is composed of a socket member 12, a slip-out preventing clip 42 mounted to a cutout part 40 of the socket member 12 so as to be freely expanded and contracted for preventing a male pipe 20 from slipping out by abutting and engaging to a flange part 32 of the male pipe 20 and a second locking surface 50 of the cutout part 40, and a cylindrical cover 52 mounted so as to cover the socket member 12 and the outside of the cutout part 40 and the slip-out preventing clip 42, provided with an elastic piece 58 for expandingly deforming the slip-out preventing clip 42 by following inserting motion of the flange part 32.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a quick fitting.

[0002]

2. Description of the Related Art As an example of such a quick fitting, there is conventionally known a quick fitting as shown in FIG. This example is an example of a pipe joint for connecting a pipe for supplying water or hot water to a faucet apparatus, more specifically, a pipe joint for connecting a supply pipe directly connected to the faucet apparatus and its upstream pipe. This is an example.

In the figure, reference numeral 200 denotes a faucet device, and reference numeral 202 denotes a supply pipe directly connected to the faucet device 200 to supply water and hot water to the faucet device 200. In this example, supply tube 202 comprises a flexible tube. Reference numeral 204 denotes a quick fitting for connecting the supply pipe 202 to the upstream pipe, and the socket member 206 and the retaining clip 208
And a safety cap 210.

FIG. 33 shows the structure of the quick fitting 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 216 is formed on the outer peripheral surface at the axial end.

On the other hand, the end fitting 21 is connected to the supply pipe 202.
8 is attached. The end fitting 218 has a male pipe 220. The male pipe 220 is inserted into the socket member 206 through the insertion opening 212 of the socket member 206. The female fitting surface 214 is fitted, and the space between them is sealed by an O-ring 224 mounted on the male fitting surface 222 in a watertight manner. Here, a flange 216 similar to that of the socket member 206 is also formed in the end fitting 218.

The retaining clip 208 is made of a leaf spring, has a substantially annular shape, has an engaging groove 228 at an intermediate portion in the width direction, and has a shape in which a part in the circumferential direction is cut out. The portion forms an opening 226, and the opening 226 is followed by a guide portion 230 having an open shape in a U shape.
Are formed continuously.

[0007] The retaining clip 208 inserts the male pipe 220 into the socket member 206 and, when the pair of flanges 216 are fitted together, elastically in the direction perpendicular to the axis through the opening 226 with respect to the flanges 216. The socket member 206 and the supply pipe 202 are fastened in the axial direction by being fitted and engaging the flange portions 216 into the engagement grooves 228.

The safety cap 210 has a pair of hooks 232 bent inward, and the hooks 23
2 is fitted and hooked to the pair of guide portions 230 of the retaining clip 208 to cover the protruding guide portion 230 and prevent the retaining clip 208 from opening.

In the case of the quick fitting 204, however, an operation (action) of inserting the male pipe 220 into the socket member 206 at the time of pipe connection, and an operation of elastically fitting the retaining clip 208 in the direction perpendicular to the axis in that state.
In addition, there is a problem that at least three steps of the operation of fitting the safety cap 210 are required thereafter, which is not sufficiently simple in terms of workability at the time of pipe connection.

[0010] In addition, in this quick fitting 204, the retaining clip 208 is exposed to the outside so that the appearance and appearance are not good, and the retaining clip 208, the safety cap 210 and the like are in a protruding state. In such a case, there is a risk that the user may be injured when the user accidentally touches the hand or the like, and at that time, the safety cap 210 and the retaining clip 208 may come off.

FIG. 34 shows another conventional example of quick fittings (Japanese Utility Model Laid-Open No. 4-46294). In this example, the male pipe 220 is inserted into the insertion opening 2 at one axial end of the socket member 206.
12 and inserted into the socket member 206, and the male fitting surface 222 on the outer surface thereof is fitted to the female fitting surface 214 of the socket member 206, and the space therebetween is sealed with an O-ring 224. In this example, the male tube 220 is prevented from coming off from the socket member 206 by a retaining clip 236 attached to the socket member 206 in this example.

More specifically, in this example, the socket member 206
A notch 238 in the circumferential direction is formed in the notch 23
8, a retaining clip 236 having elasticity is attached, and the front end and the rear end of the retaining clip 236 are connected to the male tube 2.
The male tube 220 is prevented from being removed from the socket member 206 via the retaining clip 236 by contacting the flange portion 216 provided on the second member 20 and the second locking surface 240 of the cutout portion 238. In this case, the male pipe 22
In the case of 0, the insertion amount is defined by the flange portion 216 abutting on the stepped first locking surface 242 of the socket member 206.

However, in the case of the quick fitting 244 of this embodiment, the male pipe 220 cannot be inserted into the socket member 206 while the retaining clip 236 is mounted on the socket member 206, so that the retaining clip 236 cannot be inserted. Under the detached state, first, the male pipe 220 is inserted into the socket member 206, and then the retaining clips 23 are inserted.
6 must be fitted to the socket member 206 so that at least the male pipe 220 can be connected for pipe connection.
In this case, there is a problem that the connecting operation of the pipes is not yet sufficiently simple even in the case of the quick fitting 244 of this example.

FIG. 35 shows still another conventional quick fitting (Japanese Patent Laid-Open No. 4-92185). In this example,
The male tube 220 is inserted into the socket member 206 through the insertion opening 212 at one axial end of the socket member 206, and the male fitting surface 222 of the male tube 220 is fitted to the female fitting surface 214 of the socket member 206, The space between them is sealed with a seal member 246 in a water-tight manner, and a retaining clip 248 having elasticity at a notch 250 formed in the socket member 206 is attached to the socket member 206, and this is inserted into the engaging recess 252 of the male pipe 220. While engaging,
The retaining clip 248 is connected to the first locking surface 253 of the notch 250.
And the second locking surface 254, whereby the male pipe 220
Is fixed to the socket member 206 in the axial direction.

In the case of the quick fitting 256 shown in FIG. 35, a tapered cam surface 258 is formed on the male pipe 220. Therefore, in the quick fitting 256 of this embodiment, the retaining clip 248 is attached to the socket member 206. In this state, the male pipe 220 can be inserted into the socket member 206 and the male clip 220 can be stopped with the retaining clip 248 as it is.

However, in the case of the quick fitting 256, a cam surface 258 is provided on the male pipe 220 so that the male pipe 220 is expanded by inserting the male pipe 220 with the retaining clip 248 attached to the socket member 206. There is a problem that needs to be formed. That is, there is a problem that a special male pipe 220 is required to adopt such a connection method.
There is a disadvantage that the male pipe not provided with 8 cannot be connected in this manner.

For example, supply pipe 2 shown in FIGS.
02 or the end fitting 218 attached to the end thereof does not have such a cam surface. Therefore, when connecting the conventional existing supply pipe 202 to the counterpart pipe, it cannot be applied as it is. There's a problem.

[0018]

SUMMARY OF THE INVENTION The quick fitting of the present invention has been devised to solve such a problem.
According to the first aspect of the present invention, there is provided a quick fitting for connecting a pipe, which comprises (a) a tubular shape, a female fitting surface on an inner surface, and an insertion opening at one axial end. A socket member for inserting a male tube through the insertion opening to fit a male fitting surface on the outer surface of the male tube with the female fitting surface; and (b) a socket member provided on the socket member to reduce an insertion amount of the male tube. A first locking surface to be defined;
(C) a separate member from the socket member, which is mounted on the socket member, and which can be expanded and contracted in the radial direction based on its own elasticity in the mounted state; A retaining clip which abuts in the axial direction on the projecting portion projecting in the axial direction to prevent the male tube from being removed, and (d) a cylindrical cover which is mounted so as to cover the outside of the retaining clip. It is characterized by having.

According to a second aspect of the present invention, there is provided a quick fitting for connecting a pipe, which comprises (a) a tubular shape, a female fitting surface on an inner surface, and an insertion opening at one axial end. A socket member for inserting a male tube through the insertion opening to fit a male fitting surface on the outer surface of the male tube with the female fitting surface; and (b) a socket member provided on the socket member to reduce an insertion amount of the male tube. (C) a notch formed by notching the socket member in the circumferential direction; and (d) a separate member from the socket member, and the socket member is attached to the socket member at the notch. The male pipe can be expanded and contracted in the radial direction based on its own elasticity, and the front end in the axial direction abuts and engages with a projection that projects radially from the outer surface of the male pipe. , A rear end of which is brought into contact with a corresponding second locking surface of the cutout portion to prevent the male tube from being removed. And flop, characterized in that it has a cylindrical cover which is mounted in a state that covers the outside of and the cutout portion and the retaining clip to the socket member (e).

According to a third aspect of the present invention, in any one of the first and second aspects, the cover is provided with a space for expanding and contracting the retaining clip.

According to a fourth aspect of the present invention, in the first aspect, the retaining clip has a connecting portion for connecting elastic legs which elastically expand and contract to move, while the cover has a peripheral wall. A first bulge that fits in a state where an inner surface of the portion is substantially in contact with an outer surface of the socket member, and partially bulges radially at a predetermined location in a circumferential direction of the peripheral wall portion to accommodate the connecting portion therein; A part is provided.

According to a fifth aspect of the present invention, in the first aspect, the retaining clip is fitted to the socket member in a direction perpendicular to an axis, and is fitted to the retaining clip. It has an opening for fitting and a guide part for fitting in a form protruding and opening in the opposite direction at the opening side end, while the peripheral wall of the cover is partially radially outward. A second bulging portion that bulges and guards the guide portion is provided.

According to a sixth aspect of the present invention, in the fifth aspect, when the cover is attached to and detached from the socket member in the axial direction, the guide portion is provided in the second bulging portion in the axial direction. It is characterized in that a recess which is relatively movable is formed.

According to a seventh aspect of the present invention, in the first aspect, when the male tube is inserted into the cover, the projection hits the projection and the retaining clip is driven by the insertion movement of the male tube. An elastic piece having a cam surface for expanding the opening is provided, and the retaining clip contracts after the expanding movement to abut against the projecting portion in the axial direction to prevent the male tube from being removed. It is characterized by doing what it does.

According to an eighth aspect of the present invention, in the seventh aspect, the elastic piece is provided at an end of the cover in a direction opposite to a direction in which the male pipe is inserted, and the cam surface is provided on the male pipe. The surface is shaped so as to approach the centripetal direction as it proceeds in the insertion direction.

According to a ninth aspect of the present invention, in any one of the first to eighth aspects, a locking recess is provided on one of the socket member and the cover and the other is elastically locked on the locking recess. A convex portion is provided, and the cover is attached to the socket member so as to be able to be removed in the axial direction by a locking action between the locking concave portion and the locking convex portion.

According to claim 10, in claim 9,
A slit is formed in a peripheral wall portion of the cover, an elastic deformation portion is formed between the slits, and the locking convex portion or the locking concave portion is provided in the elastic deformation portion. And

The eleventh aspect is based on the first, second, fifth and fifth aspects.
In any one of the tenth to thirteenth aspects, the cover is provided with an opening for allowing movement of the retaining clip in a direction perpendicular to the axis.

A twelfth aspect of the present invention is characterized in that, in any one of the first to eleventh aspects, a stopper is provided for regulating the movement of the retaining clip in a direction perpendicular to the axis within a predetermined range.

[0030]

As described above, the quick fitting according to the first aspect of the present invention has a tubular cover attached to the outside of a retaining clip for retaining the male pipe and the socket member in the axial direction. In this quick fitting, the retaining clip can be concealed inside the tubular cover by the cylindrical cover, so that the appearance and appearance of the connection between the socket member and the male pipe can be improved. it can.

In addition, in this quick fitting, since the retaining clip is located inside the cylindrical cover, the retaining clip may erroneously protrude when working nearby. It is possible to prevent the hand or the like from being hit or injured, or the retaining clip from coming off the socket member.

The first locking surface in the first aspect of the present invention can regulate the amount of insertion of the male tube into the socket member by bringing the front end of the male tube into contact therewith. The projection amount provided on the tube can be applied to regulate the insertion amount.

In the present invention, a retaining clip is mounted on a notch provided in the socket member so as to be able to expand and contract in the radial direction, and the front end of the retaining clip is brought into contact with the protrusion of the male pipe. On the other hand, the rear end is brought into abutment engagement with the corresponding second locking surface of the notch so as to prevent the male tube from being removed, and the cover is placed on the socket member and over the retaining clip and the outer surface of the notch. It can be made to be attached (claim 2). In this case, both the notch and the retaining clip can be hidden inside the tubular cover.

In the third aspect of the present invention, a space for expanding and contracting the retaining clip is provided on the peripheral wall of the cover. The expansion and contraction movement can be secured.

According to the present invention, a notch or a notch is provided in the peripheral wall so that a part of the peripheral wall can be elastically deformed in the expanding and contracting directions. The retaining clip can be elastically expanded and contracted with the elastic expansion and contraction of the peripheral wall. Alternatively, a bulging portion bulging radially outward may be provided on the peripheral wall portion, and the retaining clip may be elastically expanded and contracted inside the bulging portion.

However, in the present invention, it is preferable that an opening window is provided in the peripheral wall portion of the cover so as to penetrate the inside and outside, and the retaining clip is made to expand and contract through the opening window. By doing so, it is not necessary to secure a space inside the cover for the expanding / contracting movement of the retaining clip. As a result, the diameter of the cover can be reduced, and the entire quick fitting can be reduced in size. Thus, if the quick fitting can be made compact, the appearance of the pipe connecting portion can be improved.

According to a fourth aspect of the present invention, the inner surface of the peripheral wall portion of the cover is fitted so as to be substantially in contact with the outer surface of the socket member, and the first expansion portion radially partially bulges at a predetermined circumferential position of the peripheral wall portion. A projecting portion is provided to accommodate a connecting portion for connecting the elastic leg of the retaining clip inside the first bulging portion. In this case as well, the diameter of the cover is reduced and the quick fitting is made compact. be able to.

In the quick fitting according to the fourth aspect, even if the connecting portion of the retaining clip is located on the outer surface of the socket member, the connecting portion is housed inside the first bulging portion, The other inner surface portion of the peripheral wall portion can be in a state of being fitted so as to be substantially in contact with the outer surface of the socket member.

According to the quick fitting of the present invention, claim 5
In the case where an opening for fitting to the retaining clip and a guiding portion for fitting in a form protruding and opening in opposite directions at the opening side end are provided in accordance with By forming the guide portions larger than the guide portions of the clips, the guide portions can be wrapped inside the cover. Even in such a case, it is possible to prevent the worker's hand or the like from hitting the guide portion and causing injury or the like.

However, in this case, the diameter of the cover becomes large. According to the fifth aspect, since the second bulging portion that partially bulges and guards the guide portion is provided on the peripheral wall portion of the cover, almost the entirety excluding the second bulging portion is formed small. be able to. That is, the entire cover can be made compact. In addition, even in such a case, by the guard action of the second bulging portion,
It is possible to prevent an operator's hand or the like from hitting the guide portion of the projecting form of the retaining clip.

In this case, a recess is formed inside the second bulging portion so that the guide portion can be relatively moved in the axial direction when the cover is attached to and detached from the socket member in the axial direction. (Claim 6). By doing so, the cover can be axially attached to and detached from the socket member without hindrance in a state where the retaining clip is attached to the socket member in advance.

According to a seventh aspect of the present invention, an elastic piece is provided on the cover, and the retaining clip is expanded by a cam action of the cam surface provided on the elastic piece, following the insertion movement of the male pipe. Is contracted to axially abut against the protruding portion of the male pipe to stop the male pipe from being pulled out. The connection operation between the male pipe and the socket member can be completed only by inserting the male tube into the member. That is, pipe connection can be performed extremely easily by one operation (one action).

In addition, in this quick fitting, since the cam surface is formed on the cover itself, when the male pipe is inserted into the socket member while the retaining clip is mounted on the socket member, the male pipe is inserted. It is not necessary to form a cam surface as shown in FIG. 35 on the side of the pipe. Therefore, according to the quick fitting of claim 7, the existing supply pipe as shown in FIGS. There is an advantage that the connection operation can be directly performed on the socket member without any modification.

Here, the elastic piece is provided at the end of the cover in the direction opposite to the inserting direction of the male pipe, and has a shape that approaches the centripetal direction as the elastic piece advances in the cam surface in the inserting direction of the male pipe. It can be a plane (claim 8).

In the present invention, one of the socket member and the cover is provided with a locking concave portion, and the other is provided with a locking convex portion, so that they are elastically locked. It can be configured to be detachably mounted (claim 9). By doing so, the cover can be easily attached to and detached from the socket member, and by removing the cover in the axial direction under the pipe connection condition, the retaining clip can be easily removed from the socket member or the axis perpendicular to the axis. Direction and the direction opposite to the fitting direction. Thereby, the male pipe can be easily extracted from the socket member.

In this case, slits may be provided in the peripheral wall portion of the cover to form an elastically deformable portion between the slits, and the elastically deformable portion may be provided with the above-mentioned locking convex portion or locking concave portion. Claim 10). By doing so, the elastic deformability of the locking projections or locking recesses can be effectively increased, and the cover can be more easily attached to and detached from the socket member.

The cover can be provided with an opening for allowing the retaining clip to move in the direction perpendicular to the axis by inserting the retaining clip in the direction perpendicular to the axis. When the retaining clip is radially expanded by the cam surface of the cover when the male pipe is inserted, the retaining clip moves easily in the direction perpendicular to the axis and in the opposite direction to the fitting direction. be able to. In this case, by providing an opening for inserting the retaining clip in the cover, the retaining clip can be easily moved in the direction perpendicular to the axis.

On the other hand, if the retaining clip can move in the direction perpendicular to the axis without any restriction, the retaining clip may come off the socket member. According to the twelfth aspect of the present invention, a stopper is provided to prevent this. With such a configuration, it is possible to reliably prevent the retaining clip from coming off the socket member.

[0049]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings. 1 and 2, reference numeral 10 denotes a quick fitting of the present embodiment, and reference numeral 12 denotes a socket member as a component thereof. The socket member 12 has a tubular shape as a whole, and has a female fitting surface 14 formed on the inner surface. A female screw hole 16 is formed at one end in the axial direction (lower end in the figure), and the female screw hole 16 is screw-connected to a mating pipe. An insertion opening 18 is formed at the other axial end (upper end in the figure) of the socket member 12, and an end member 24 described later is formed through the insertion opening 18.
Is inserted into the socket member 12.

In FIG. 1B, reference numeral 22 denotes one pipe to be connected (in this example, the supply pipe shown in FIGS. 32 and 33).
At its end, a tubular end member 24 made of metal fittings is mounted. The end member 24 includes a nipple portion 26, and the nipple portion 26 is
It is fitted to the inside, and is fixed to the main body 28 together with the sleeve 30 which is crimped on the outer surface of the main body 28 in the diameter reducing direction.

The end member 24 has a flange portion (projection portion) 32 protruding in the radial direction on the outer surface of the male pipe 20, and is further male-fitted to a front portion (lower portion in the figure) following the flange portion 32. It has a mating surface 34. The male fitting surface 34 is fitted to the female fitting surface 14 of the socket member 12.

An O-ring groove is formed on the outer peripheral surface of the male pipe 20, and an O-ring 36 is mounted therein. The O-ring 36 seals the male fitting surface 34 and the female fitting surface 14 in a watertight manner. Is done. Here, the male fitting surface 34 is a surface that is straight in the axial direction (a surface that extends in the axial direction of the socket member 12). The corresponding female fitting surface 14 is similar. The socket member 12 is formed with a stepped portion, in which a first locking surface 38 in a direction perpendicular to the axis is formed, and the flange portion 32 of the end member 24 is connected to the first locking surface 38. The amount of insertion of the male tube 20 into the socket member 12 is defined by the contact.

The socket member 12 is formed with a notch 40 formed by notching it in the vicinity of the insertion opening 18 in the circumferential direction.
2 is mounted on the socket member 12 in a direction perpendicular to the axis. The retaining clip 42 is made of a leaf spring material (made of metal in this example), as shown in FIG. 3, and is disposed with its plate surface oriented in the axial direction of the socket member 12.

The retaining clip 42 includes a pair of elastic legs 4.
4 and a connecting portion 46 that connects them at one end in the circumferential direction. A pair of elastic legs 44 are located in the cutout portion 40. The connecting portion 46 is located on the outer surface of the socket member 12, and the connecting portion 46 is provided with a knob 48 having a shape projecting outward in a direction perpendicular to the axis.

As shown in FIG. 1B, the retaining clip 42 has a front end (lower end in the figure) in contact with the flange 32 of the male pipe 20 and a rear end (upper end in the figure). The male tube 20 is prevented from coming off from the socket member 12 by making contact with the corresponding second locking surface 50 of the notch 40 in the socket member 12.

A cover 52 is mounted on the socket member 12. The cover 52 is a member having a cylindrical shape as a whole, and is mounted so as to cover the cutout portion 40 and the retaining clip 42 of the socket member 12 from the outside. In this example, the notch 40 and the retaining clip 42
Is hidden inside the cover 52.

As shown in FIG. 1B in an enlarged manner,
An engaging projection 54 is provided on the inner surface of the end of the cover 52 in the insertion direction of the male pipe 20 (the lower end in the drawing). The engaging projection 54 is provided on the outer surface of the socket member 12. The cover 52 is elastically locked to the stop recess 56, and the cover 52 is detachably attached to the socket member 12 by their locking action.

A pair of elastic pieces 58 are provided at the end of the cover 52 in the direction opposite to the insertion direction of the male pipe 20 (the upper end in FIG. 1B). These elastic pieces 58 have a substantially inclined shape, and the upper surface thereof is the cam surface 60, that is, the male pipe 2.
The cam surface 60 has an inclined shape that approaches the centripetal direction of the male tube 20 as it advances in the zero insertion direction.

At the tip of each of the pair of elastic pieces 58,
A bent portion 66 having a shape bent in the axial direction of the male pipe 20 is formed, and each of the bent portions 66 is formed on the inner surface of the retaining clip 42, specifically, on the inner surface of each of the pair of elastic legs 44. Locked.

The elastic piece 58 operates as follows. That is, when the male pipe 20 is inserted into the socket member 12 in the axial direction, the cam surface 60 of the elastic piece 58
And the elastic piece 58 is elastically deformed in the expanding direction following the insertion movement of the further male pipe 20,
At the same time, the retaining clip 42 is expanded and deformed in the radial direction. This allows the flange portion 32 of the male pipe 20 to pass through the retaining clip 42.

The flange portion 32 is provided with a retaining clip 42.
, The retaining clip 42 contracts and moves with its own elastic force (at this time, the elastic piece 58 also contracts and moves). The retaining clip 42 that has contracted and moved has its front end and rear end connected to the second locking surface 5 of the flange 32 and the notch 40.
0, and the socket member 12 of the male pipe 20
Prevent from falling off.

As shown in FIG. 1A, the cover 52 has an opening 62 for inserting the knob 48 at a predetermined position in the circumferential direction. This opening 62 is used when the retaining clip 42 expands with movement in the direction perpendicular to the axis.
By inserting the knob portion 48 into the inside, the retaining clip 42 is allowed to move in a predetermined range perpendicular to the axis and in the opposite direction to the fitting direction.

When the retaining clip 42 moves in the direction perpendicular to the axis by a predetermined distance, the shoulder 64 abuts against the inner surface of the cover 52, thereby preventing further movement in the direction perpendicular to the axis. That is, in this example, the shoulder 64 and the cover 52
And the inner surface of the member constitute stopper means.

However, in some cases, as shown in FIGS. 6 and 7, the connecting portion 46 of the retaining clip 42 is always kept in contact with the inner surface of the cover 52, and the retaining clip 42 is
It is also possible to simply perform the expanding / contracting movement without the movement in the direction perpendicular to the axis. Alternatively, an opening having the same size as the connecting portion 46 of the retaining clip 42 is provided in the cover 52, and when the retaining clip 42 expands with the movement in the direction perpendicular to the axis, the movement amount in the direction perpendicular to the axis is reduced. It is also possible to predetermine the amount so that the connecting portion 46 does not protrude outside the opening.

Next, the operation of the quick fitting 10 of this embodiment will be described. In the case of the quick fitting 10 of this example, FIGS.
And as shown in FIG.
2 and the cover 52 are mounted on the socket member 12 in advance.
Under this condition, the male pipe 20 is inserted into the socket member 12 through the insertion opening 18.

At this time, the elastic piece 58 provided on the cover 52
The flange portion 32 of the male pipe 20 is formed by the cam action of the cam surface 60.
Following the movement in the insertion direction, the retaining clip 42 is expanded and deformed, and the flange clip 32 is allowed to pass through (see FIG. 5 (II)). Then, as described above, when the flange portion 32 has passed the retaining clip 42,
The retaining clip 42 contracts and moves with its own elastic force, and the male tube 2
0 is locked in the locking state (Fig. 4 (II) and Fig. 5 (II
I)).

When the male tube 20 is pulled out from the socket member 12, the cover 52 is first drawn out in the axial direction from the socket member 12, and then the retaining clip 42 is removed from the socket member 12 to prevent the male tube 20 from being pulled out. Is released, and the male pipe 20 is extracted from the socket member 12. By doing so, the male pipe 20 can be easily extracted from the socket member 12.

In the quick fitting 10 of the present embodiment as described above, the cutout portion 40 of the socket member 12 and the retaining clip 42 attached thereto are hidden by the tubular cover 52 inside the cutout portion 40. The appearance and appearance of the connection between the socket member 12 and the male pipe 20 can be improved.

In addition, in this quick fitting 10, as in the conventional quick fitting shown in FIGS. It can be prevented that the clip is removed from the socket member or the male tube comes off from the socket member.

Further, in the case of the quick fitting 10 of the present embodiment, the male pipe 20 is simply inserted into the socket member 12 to insert the male pipe 2.
The connection work between the socket 0 and the socket member 12 can be completed. That is, pipe connection can be performed extremely easily by one operation (one action).

In addition, in this quick fitting 10, the cover 5
Since the cam surface 60 is formed on the male pipe 2 itself, it is not necessary to form a cam surface as shown in FIG. 35 on the male pipe 20 side.
Also, the connection work can be directly connected to the socket member 12 without any modification of the existing supply pipe as shown in FIG.

Further, in the quick fitting 10 of this embodiment, a locking concave portion 56 and a locking convex portion 54 are provided in the socket member 12 and the cover 52 to elastically lock them. Since the cover 52 is detachably attached to the socket member 12, the cover 52 can be easily attached to and detached from the socket member 12, and the cover 52 can be removed in the axial direction under a pipe connection state. Thus, the retaining clip 42 can be easily removed from the socket member 12 or moved in the direction perpendicular to the axis. Thereby, the male pipe 20 can be easily extracted from the socket member 12.

FIGS. 8 and 9 show another embodiment of the present invention. In these figures, reference numeral 68 denotes a retaining clip, which is formed by bending a metal leaf spring material into a substantially annular shape. As shown in FIG. 9, the retaining clip 68 has an opening 70 for fitting at a predetermined position in the circumferential direction, and a projecting portion that protrudes in the opposite direction at the end on the opening 70 side, and has a form of opening in a C shape. And a pair of elastic legs 44, each of which has an engaging groove 74 at an intermediate portion in the width direction.

In the case of the retaining clip 68, the flange portion 76 formed on the shaft end of the socket member 12 and the flange portion 32 on the male pipe 20 side are engaged in the engagement grooves 74, so that the socket member 12 The male tube 20 is engaged in the axial direction to prevent the male tube 20 from being pulled out.

In the quick fitting 10 of this embodiment, the retaining clip 68 is mounted in advance in the direction perpendicular to the axis with respect to the socket member 12.
Is inserted into the engagement groove 74 of the retaining clip 68, and the cover 52 is further attached so that the bent portion 66 is engaged with the inner surface of the elastic leg 44 of the retaining clip 68. Then, the male pipe 20 is inserted into the socket member 12 in this state.

At this time, the elastic piece 58 and the retaining clip 68 on the cover 52 are formed by the flange 32 of the male pipe 20.
Move radially to allow the flange portion 32 to pass through. When the flange portion 32 passes through the elastic piece 58 in the axial direction and reaches a position corresponding to the engagement groove 74 of the retaining clip 68, the retaining clip 68 contracts and moves with its own elastic force, and the flange portion 32 is moved. The male tube 20 and the socket member 12 are prevented from coming off in the axial direction by being engaged with the engagement groove 74 together with the flange portion 76 of the socket member 12.

FIGS. 10 to 14 show still another embodiment of the present invention. In this example, the retaining clip itself has a cam surface. In these figures, reference numeral 78 denotes the retaining clip, the basic shape of which is the same as the retaining clip 68 of the embodiment shown in FIGS.

However, the retaining clip 78 of this example is similar to that of FIG.
As shown in FIG. 13, a mortar-shaped cam surface 80 is provided at the upper end of each of the pair of elastic legs 44 in the drawing. Specifically, a mortar-shaped cam surface 80 having a shape that approaches the centripetal direction as the male tube 20 advances in the insertion direction is provided.
The pair of elastic legs 44 are formed at respective upper ends. As a result of the cam surface 80 being formed on the retaining clip 78, the elastic piece 58, the cam surface 60, and the bent portion 66 are not provided on the cover 52 side in this example.

In the case of the quick fitting 10 of this embodiment, a retaining clip 78 is previously attached to the socket member 12 as in the embodiments of FIGS. 8 and 9, and the retaining clip 78 is further covered on the outside of the retaining clip 78. The male tube 20 and the socket member 12 can be connected only by inserting the male tube 20 into the socket member 12 with the cover 52 attached thereto (FIGS. 11 and 14 (I)). , (II)).

More specifically, when the male tube 20 is inserted with the retaining clip 78 attached to the socket member 12 side,
The flange portion 32 of the male pipe 20 abuts against the cam surface 80 of the retaining clip 78, and in the process of further advancing in the axial direction, the pair of elastic legs 44 of the retaining clip 78 expand by the cam action of the cam surface 80, The passage of the flange portion 32 is allowed.

When the flange portion 32 reaches the position corresponding to the engagement groove 74, the retaining clip 78 contracts and moves by its own elastic force, and the flange portion 32 on the male pipe 20 side here.
Into the engagement groove 74 together with the flange 76 on the socket member 12 side, and the male pipe 20 and the socket member 12 are engaged.
And in the axial direction.

Next, another embodiment of the present invention will be described with reference to FIGS.
It will be described in detail based on. This embodiment shows an embodiment in which the quick fitting of the present invention is used for connection between a supply pipe directly connected to a faucet device and an upstream pipe thereof (the embodiment shown in FIGS. 1 to 14). 15 is a faucet device (in this example, a single-lever-type hot-water mixing faucet) installed on the upper surface of a counter or the like (not shown).
4 is a faucet main body, 86 is a lever-type operation unit provided on the upper part thereof, and 88 is a water discharge pipe extending from the faucet main body 84.

The water discharge pipe 88 includes a pipe main body 90 integrally formed with the faucet main body 84 and a water discharge head 92 that can be pulled out together with the hose 96. Here the spout head 9
2 has a water discharge port 94 at the tip, and discharges water from this water discharge port 94. In this example, the water discharge head 92 can switch the water discharge from rectified water discharge to shower water discharge or vice versa.

Reference numeral 98 denotes a supply pipe (upstream pipe) for water and hot water as a partner pipe, which projects laterally from the wall W to the room side. A water stopcock 1 is provided at the distal end of the pair of supply pipes 98.
00 is provided. The water stopcock 100 has a connection port 102 facing upward. A male screw 104 is formed on the outer surface of the connection port 102.

In this example, the faucet device 82 and the pair of supply pipes 98 are connected to each other by a connection piping device 106. The connection piping device 106 includes one pipe (flexibility) 108 to be connected and the quick fitting 110 of this example, and the end of the pipe 108 is connected to the supply pipe 98 by the quick fitting 110. Specifically, it is connected to the water stopcock 100 at the tip.

The pipe 108 forms a supply pipe of water or hot water, and the water or hot water sent through the supply pipe 98 is sent to the faucet body 84 through these pipes 108. The water and hot water sent to the faucet main body 84 are mixed therein at a predetermined ratio, and the mixed water flows out through the outflow pipe 112 to the outside. The water is sent to the water discharge head 92 through the hose 96 connected to the outflow pipe 112, and is discharged from the water discharge port 94 at the tip.

Reference numeral 114 denotes a hose guide for guiding the hose 96, and reference numeral 116 denotes a stopper for regulating the amount of the hose 96 withdrawn to a fixed amount. When the stopper 116 contacts the hose guide 114, the hose 96 is prevented from being further pulled out.

The quick fitting 110 is shown in FIGS.
The socket member 118 is provided as the main element as shown in FIG. The socket member 118 has a cylindrical shape as a whole, and has a female screw hole 134 at one end in the axial direction (the lower end in FIGS. 16 and 19). It is screwed to a male screw 104 of the mouth 102. That is, the socket member 118 is screw-connected to the water stopcock 100.

As shown in FIGS. 18 and 23, the socket member 118 has an insertion opening 1 at the other end in the axial direction (upper end in the drawing).
36, and a notch 138 formed by notching the socket member 118 in a circumferential direction over a predetermined circumferential length at a lower position in the figure. As shown in FIG. 16, a concave portion 140 for accommodating a flange portion 128 of the male pipe 126 described later is formed so as to face the cutout portion 138. A mating surface 144 is formed. In the drawing, reference numeral 142 denotes a first locking surface that defines the amount of insertion of the male tube 126 by the contact of the flange portion 128 with the male tube 126.

On the other hand, a tubular end member 120 made of metal fittings is attached to one end of the tube 108. End member 1
20 has a nipple portion 122 which is fitted into the main body 109 of the tube 108 and, in that state, a distal end of the main body 109 together with a sleeve 124 which is crimped in the outer diameter direction on the outer surface of the main body 109. It is fixed to.

The end member 120 has a male pipe 126, an annular flange portion (protruding portion) 128 projecting radially from the outer surface thereof, and a male fitting surface having a circular cross section at the front end following the flange portion 128. 130 and a male tube 1
An O-ring 132 as a seal member is mounted on the outer peripheral surface of 26.

The male pipe 126 of the end member 120 is inserted into the insertion opening 1 at the upper end in the figure with respect to the socket member 118.
36, the male mating surface 130 mates with the female mating surface 144 and the mating surfaces
Is sealed watertight. At this time, the flange portion 128 is housed in the concave portion 140 of the socket member 118.

As shown in FIG. 18, the lower end of the socket member 118 has a large-diameter hexagonal tool hook 146.
Are integrally formed. The tool hook 146 has a flat tool hook 148, and the socket member 118 can be rotated by hooking a tool on the tool hook 148. That is, by the rotation operation, the female screw hole 134 of the socket member 118 is
Can be screw-connected.

As shown in FIGS. 16 to 19, the quick fitting 110 of the present embodiment is configured so that the male member 12 is connected to the socket member 118.
6 to prevent the clip 6 from coming off in the axial direction.
50. This retaining clip 150 is shown in FIG.
As shown in FIG. 24, the metal plate spring material is bent and deformed into a substantially U-shape, and has a pair of elastic legs 152 and a connecting portion 154 thereof. The pair of elastic legs 152 are fitted in the socket member 118 in a state where they are fitted in the direction perpendicular to the axis and each of the pair of elastic legs 152 is located in the notch 138.

As shown in FIG. 16, the retaining clip 150 has a front end (lower end in the figure) in contact with the flange 128 of the end member 120 and a rear end (upper end in the figure).
Abuts on the second locking surface 162 of the notch 138 of the socket member 118 to prevent the male tube 126 from coming off from the socket member 118.

The retaining clips 150 project in opposite directions to an opening 155 for fitting at a predetermined position in the circumferential direction and a tip end (an end on the opening 155 side) of the pair of elastic legs 152, respectively.
It has a guide 156 for fitting in a form of a C-shape, and when the retaining clip 150 is fitted to the socket member 118 in a direction perpendicular to the axis, through the opening 155 and by the guide 156. You will be guided.

Each of these guide portions 156 is formed with a stopper claw 158 projecting in a direction parallel to the plate surface of the retaining clip 150. On the other hand, a locking recess 164 is formed on the outer surface of the socket member 118, and a stopper claw 158 is accommodated in the locking recess 164.

The stopper recess 164 has a stopper surface 166.
The stopper surface 166 and the stopper claw 158 of the retaining clip 150 prevent the retaining clip 150 from slipping out of the socket member 118 in the direction perpendicular to the axis. However, stopper claw 158
Is movable within the locking recess 164 in a direction perpendicular to the axis by a certain distance. That is, the retaining clip 150 is mounted on the socket member 118 so as to be movable by a predetermined distance in the direction perpendicular to the axis.

A pair of elastic legs 1 of this retaining clip 150
Each of the 52 has a cam surface 160 formed integrally therewith. Here, the cam surface 160 has a mortar shape as shown in FIG. More specifically, it has a mortar shape that approaches the centripetal direction as it moves forward, which is the insertion direction of the male tube 126.

The cam surface 160 operates as follows.
That is, when the male tube 126 is inserted into the socket member 118 in the axial direction, the cam surface 160 comes into contact with the flange portion 128 of the male tube 126 during the insertion movement, and then the insertion movement of the end member 120 further proceeds. Accordingly, the cam surface 160 causes the pair of elastic legs 152 of the retaining clip 150 to resiliently expand by a cam action.

As a result, the retaining clip 150 allows the flange 128 to pass therethrough, and when the flange 128 passes through the retaining clip 150 with the expanding movement of the retaining clip 150, the retaining clip 150 contracts due to its own elastic force. . At this time, the front end of the retaining clip 150 abuts and engages with the flange portion 128, and the rear end has the notch 138.
Of the male tube 126, that is, the tube 108 from the socket member 118 is prevented.

In FIGS. 16 to 19, reference numeral 168 denotes a cover (made of resin in this example) mounted on the socket member 118 so as to cover the retaining clip 150 and the notch 138 in the mounted state from the outside. 25, it has a substantially cylindrical shape. Here the cover 168
16 are fitted with the inner surface of the peripheral wall portion 178 almost in contact with the outer surface of the socket member 118 as clearly shown in FIG.

The cover 168 has an open end at the lower end and an inward flange 170 formed at the upper end, and an end member 120 having a male pipe 126 inside the flange 170. And an opening 172 for inserting the tube 108.

Further, as shown in FIG.
8 has a first bulging portion 174 which partially expands in the radial direction and accommodates the connecting portion 154 of the retaining clip 150 therein at a predetermined position in the circumferential direction, and further, a position substantially opposite to the first bulging portion 174. , The pair of guide portions 1 in the retaining clip 150
A pair of second bulging portions 176 partially bulging radially outward corresponding to 56 are provided.

FIG. 26 is a sectional view of the second bulging portion 176 so that the second bulging portion 176 can be axially fitted to the socket member 118 when the retaining clip 150 is mounted on the socket member 118. And has a substantially U-shape. Specifically, when the cover 168 is attached to and detached from the socket member 118 in the axial direction while the retaining clip 150 is attached to the socket member 118, the guide portion 156 of the retaining clip 150 is provided inside the second bulging portion 176. Is formed to allow the shaft to relatively move in the axial direction.

The second bulging portion 176 bulges outward from the pair of guide portions 156 of the retaining clip 150 attached to the socket member 118, and the guide portion 156 is opened in a C-shape. Has a function as a guard for preventing the hand or the like from hitting the guide portion 156 so as to prevent it from being exposed and protruding alone.

The cover 168 is provided with an opening window (space) 180 having a predetermined circumferential length along the peripheral wall portion 178 and penetrating the peripheral wall portion 178 in and out. Retaining clip 15
0, specifically, the pair of elastic legs 152
In the portion of 0, the socket member 118 can elastically expand and contract in the radial direction. A slit 182 is formed at a predetermined position in the circumferential direction at a lower end of the peripheral wall portion 178 of the cover 168, and an elastic deformation portion 184 is formed between the slits 182 and 182.

As shown in FIG. 26, a locking projection 186 projecting inward is formed on the inner surface of the elastic deformation portion 184. On the other hand, on the outer surface of the socket member 118, a locking concave portion 188 is formed in an annular position at an axial position corresponding to the locking convex portion 186, and the locking concave portion 188 is formed.
The locking projection 186 is elastically locked with respect thereto. The cover 168 is detachably attached to the socket member 118 by the locking action of the locking projection 186 on the locking recess 188.

Next, the procedure of connection by the quick fitting 110 of this embodiment will be described in detail below together with its operation. In this example, first, the end of the tube 108 is connected to the faucet device 82, and in this state, the male tube 126 of the end member 120 attached to the other end of the tube 108, specifically, the end, is quickly connected. Pipe fitting 11
0, the supply pipe 98, specifically, the stopcock 1 at the tip thereof
Connect to 00. The procedure at that time is as follows.

First, the socket member 118 of the quick fitting 110 is screw-connected to the water stopcock 100, and the retaining clip 150 and the cover 168 are attached to the socket member 118 as shown in FIG. Keep it. The procedure at this time is as follows. First, the retaining clip 150 is fitted to the socket member 118 from the direction perpendicular to the axis (see FIG. 18), and then the cover 168 is fitted to the socket member 118 in the axial direction. I do. FIG.
(I) shows the state at this time.

In this state, the end member 1 attached to the pipe 108
The male tube 126 at 20 is connected to the opening 172 of the cover 168.
And, it is inserted into the socket member 118 through the insertion opening 136 at the axial end of the socket member 118. During the insertion process, the male fitting surface 130 of the male pipe 126 enters the female fitting surface 144 of the socket member 118 (FIG. 27 (II)
Subsequently, the flange portion 128 is fixed to the retaining clip 150.
Abuts against and contacts the cam surface 160.

From this state, the male tube 126, that is, the tube 108
28 is inserted further downward in the figure, the pair of elastic legs 152 of the retaining clip 150 is elastically expanded by the cam of the cam surface 160 following the insertion movement of the tube 108 as shown in FIG. 28 (III). The opening movement is performed to allow the male tube 126 to pass through the flange portion 128.

The flange portion 128 has the retaining clip 1
50, the first locking surface 142 of the socket member 118
Is held in the recess 140, the retaining clip 150 contracts and moves with its own elastic force. The retaining clip 150 has its front end abuttingly engaged with the flange portion 128 and its rear end having the second locking surface 16 of the notch 138.
2 is brought into contact with and engaged with the male pipe 1 here.
26, that is, a state in which the tube 108 is prevented from coming off the socket member 118. FIG. 28 (IV) and FIGS. 21 and 22
Represents the state at this time.

When the retaining clip 150 expands with the insertion movement of the male tube 126, the retaining clip 150 tends to move slightly in the direction perpendicular to the axis and in the direction opposite to the fitting direction in FIG. However, in this example, the cover 168 is attached to the socket member 118 and wraps the retaining clip 150 from the outside and prevents its movement in the direction perpendicular to the axis, so that the male pipe 126 is perpendicular to the axis of the retaining clip 150. The insertion work can be performed inside the socket member 118 without moving in the direction.

FIGS. 29 to 31 show a procedure and an operation when the tube 108 is extracted from the socket member 118. FIG.
First, as shown in FIGS. 29 (I) and (II), the tube 1
08 from the socket member 118, the cover 1
68 is lifted upward (in the axial direction) in the figure, and the socket member 1
18. Thereafter, as shown in FIGS. 30 (III) and (IV), the retaining clip 150 is moved in the direction perpendicular to the axis and in the direction opposite to the fitting direction, and
The action of the retaining against 26 is released.

Thereafter, the male tube 126 is pulled upward together with the tube 108 in the figure. Here, as shown in FIG. 31 (V), the male pipe 126 is pulled out from the socket member 118 in the axial direction. That is, the pipe 108 comes off the supply pipe 98.

In the quick fitting 110 of this example, since the cover 168 is provided with the opening window 180 for the expansion and contraction movement of the retaining clip 150, the diameter of the retaining clip 150 is increased and reduced inside the cover 168. There is no need to reserve space for contraction, so the cover 1
The diameter of the quick fitting 68 can be reduced without increasing the diameter of the pipe 68, and the entire quick fitting 110 can be reduced in size. This makes it possible to improve the appearance of the pipe connection portion.

In the present embodiment, the first bulging portion 174 partially bulging in the radial direction is provided on the peripheral wall portion 178 of the cover 168.
Is provided to accommodate the connecting portion 154 of the retaining clip 150 therein.
Even if the connecting portion 154 in 50 is located on the outer surface of the socket member 118, the inner surface of the portion other than the first bulging portion 174 of the peripheral wall portion 178 is brought into a fitted state so as to substantially contact the outer surface of the socket member 118. Thus, the diameter of the cover 168 can be reduced, and the quick fitting 110 can be made compact.

Further, in this example, the guide portion 156 is provided in the retaining clip 150 in a protruding shape, but since the cover 168 is provided with the second bulging portion 176 for guarding the guide portion 156, the guard action acts on the worker. Is the guide part 1
It is possible to prevent the user from being injured by hitting 56. The second bulging portion 176 is provided on the cover 1.
Since the cover 168 is provided on the peripheral wall portion 178 in a partially swelling form, the cover 168 can be formed almost entirely except for the second swelling portion 176 without increasing the diameter, and the entire cover 168 can be formed entirely. It can be made compact.

A recess is formed inside the second bulging portion 176 so that the guide 156 can be relatively moved in the axial direction when the cover 168 is attached to and detached from the socket member 118 in the axial direction. Therefore, the cover 168 can be attached to and detached from the socket member 118 in the axial direction without hindrance in a state where the retaining clip 150 is attached to the socket member 118 in advance.

In this example, the peripheral wall portion 17 of the cover 168 is also provided.
8 are provided with slits 182, elastic deformation portions 184 are formed between the slits 182, and the elastic projections 184 are provided with the locking projections 186.
Of the cover 168 can be effectively improved, and the cover 168 can be more easily attached to and detached from the socket member 118.

Although the embodiment of the present invention has been described in detail, this is merely an example. For example, the male tubes 20, 126 can be formed integrally with the tubes 22, 108, or the socket members 12, 118 can be formed integrally with the mating tube. Also, the present invention can be applied to connection of pipes and other various pipes other than faucet equipment,
In the above example, the retaining clip 42 is made of a leaf spring material. However, the retaining clip may be made of a wire made of metal or other material in some cases, and the present invention does not depart from the gist of the invention. It can be configured in a form in which various changes are made in the range.

[Brief description of the drawings]

FIG. 1 is a view showing a quick fitting according to an embodiment of the present invention together with a peripheral portion thereof.

FIG. 2 is a diagram showing a state before inserting a male pipe into a socket member of the same embodiment.

FIG. 3 is a perspective view showing a state where a socket member, a retaining clip and a cover of the same embodiment are separated from each other.

FIG. 4 is a perspective view showing a state before and after insertion of a male tube into a socket member of the same embodiment.

FIG. 5 is an operation explanatory view of the quick fitting of the same embodiment.

FIG. 6 is a view showing a quick fitting according to another embodiment of the present invention.

FIG. 7 is an operation explanatory view of the quick fitting of the same embodiment.

FIG. 8 is a view showing a quick fitting according to still another embodiment of the present invention together with a peripheral portion thereof.

FIG. 9 is an exploded perspective view showing the quick fitting of the same embodiment disassembled into respective members.

FIG. 10 is a view showing a quick fitting according to still another embodiment of the present invention together with its peripheral portion.

FIG. 11 is a view showing the quick fitting of the same embodiment in a state before connection.

FIG. 12 is an exploded perspective view showing the quick fitting of the same embodiment in various parts.

FIG. 13 is a view showing a configuration of a retaining clip in the quick fitting of the same embodiment.

FIG. 14 is an operation explanatory view of the quick fitting of the same embodiment.

FIG. 15 is a view showing an example in which a quick fitting according to still another embodiment of the present invention is used for connection between a faucet device and a supply pipe.

FIG. 16 is an enlarged vertical sectional view of a main part showing the quick fitting of the same embodiment together with its peripheral part.

FIG. 17 is an enlarged cross-sectional view of a main part of the quick fitting of the same embodiment.

FIG. 18 is an exploded perspective view showing the quick fitting and its peripheral portion of the same embodiment disassembled into respective members.

FIG. 19 is a longitudinal sectional view showing the quick fitting of the same embodiment and its peripheral portion in a disassembled state.

FIG. 20 is a perspective view showing the quick fitting and its peripheral portion of the same embodiment before inserting a male pipe.

FIG. 21 is a perspective view showing the quick fitting of the same embodiment and its peripheral part in a state where a male pipe is inserted and connected.

FIG. 22 is a front view and a side view showing the same state as FIG. 21;

FIG. 23 is a diagram showing the socket member in the quick fitting of the same embodiment in a single state.

FIG. 24 is a diagram showing the retaining clip in the quick fitting of the same embodiment in a single state.

FIG. 25 is a perspective view showing a cover of the quick fitting of the same embodiment in a single state.

26 is a diagram showing the structure of the cover of FIG. 25 in detail.

FIG. 27 is a diagram showing a connection procedure in the quick fitting of the same embodiment.

FIG. 28 is an explanatory diagram of a procedure following FIG. 27;

FIG. 29 is a diagram showing a procedure for disconnecting the quick fitting of the same embodiment.

FIG. 30 is an explanatory diagram of a procedure following FIG. 29;

FIG. 31 is an explanatory diagram of a procedure following FIG. 30;

FIG. 32 is a view showing an example of a conventional quick pipe joint.

FIG. 33 is an exploded view showing the quick fitting of FIG. 32 into various members.

FIG. 34 is a view showing another example of a conventional quick fitting.

FIG. 35 is a view showing still another example of the conventional quick fitting.

[Explanation of symbols]

 10, 110 Rapid fitting 12, 118 Socket member 14, 144 Female fitting surface 18, 136 Insertion opening 20, 126 Male pipe 22, 108 Pipe 32, 128 Flange (projecting part) 34, 130 Male fitting surface 38, 142 first locking surface 40,138 notch 42,68,78,150 retaining clip 50,162 second locking surface 52,168 cover 54,186 locking convex 56,188 locking concave 58 elastic piece 60 cam Surface 62 Opening 64 Shoulder 98 Supply pipe (counter pipe) 152 Elastic leg 154 Connecting part 155 Opening 156 Guide part 174 First bulging part 176 Second bulging part 178 Peripheral wall part 180 Opening window (space) 182 Slit 184 Elasticity Deformation part

Claims (12)

[Claims] 1. A quick fitting for connecting a pipe, comprising: (a) a tubular pipe having a female fitting surface on an inner surface, an insertion opening at one axial end, and a male pipe from the insertion opening. And (b) a first locking member provided on the socket member for defining an insertion amount of the male tube. And (c) the socket member is separate from the socket member. The socket member is mounted on the socket member, and in the mounted state, can expand and contract in the radial direction based on its own elasticity. A retaining clip for axially abutting engagement with a protruding portion radially protruding from the male tube to prevent the male tube from being detached; and A quick fitting comprising: 2. A quick fitting for connecting a pipe, comprising: (a) a tubular pipe having a female fitting surface on an inner surface, an insertion opening at one axial end, and a male pipe from the insertion opening. And (b) a first locking member provided on the socket member for defining an insertion amount of the male tube. (C) a notch formed by notching the socket member in the circumferential direction; and (d) the socket member is formed separately from the socket member, and is mounted on the socket member at the notch portion and based on its own elasticity. The front end in the axial direction can be brought into contact with a protrusion protruding in the radial direction from the outer surface of the male tube while the rear end of the cutout can be expanded and contracted radially in the notch. A retaining clip for abuttingly engaging the corresponding second locking surface to retain the male tube, and (e) the socket A quick fitting having a tubular cover attached to a member and mounted so as to cover the notch and the outside of the retaining clip. 3. The quick fitting according to claim 1, wherein the cover has a space for expanding and contracting the retaining clip. 4. The cover according to claim 1, wherein the retaining clip includes a connecting portion for connecting elastic legs which elastically expand and contract. A first bulging portion which is fitted in a state substantially in contact with the outer surface of the socket member and partially bulges in a radial direction at a predetermined circumferential position of the peripheral wall portion and accommodates the connecting portion therein is provided. Quick fittings. 5. The retaining clip according to claim 1, wherein the retaining clip is fitted to the socket member in a direction perpendicular to an axis, and an opening for fitting to the retaining clip is provided. And a guide portion for fitting, which is formed in such a manner as to protrude and open in opposite directions at the opening-side end portion, while the peripheral wall portion of the cover partially bulges radially outward to guide the guide. A quick fitting characterized in that a second bulging portion for guarding the portion is provided. 6. The guide portion according to claim 5, wherein the guide portion is movable relative to the inside of the second bulging portion when the cover is attached to and detached from the socket member in the axial direction. A quick pipe joint characterized in that a recess is formed. 7. The cover according to any one of claims 1 to 6, wherein when the male tube is inserted into the cover, the stopper clip contacts the protruding portion and moves the retaining clip to expand following the insertion movement of the male tube. An elastic piece provided with a cam surface is provided, and the retaining clip contracts after the expanding movement to axially abut against the protruding portion to prevent the male tube from being removed. Quick fittings characterized by the following. 8. The male member according to claim 7, wherein the elastic piece is provided at an end of the cover in a direction opposite to a direction in which the male tube is inserted, and the cam surface moves in the direction in which the male tube is inserted. A quick fitting characterized by having a surface shaped to approach a centripetal direction. 9. The locking member according to claim 1, wherein one of the socket member and the cover has a locking concave portion, and the other has a locking convex portion elastically locked to the locking concave portion. A quick fitting, wherein the cover is attached to the socket member so as to be able to be removed in the axial direction by a locking action between the locking concave portion and the locking convex portion. 10. The cover according to claim 9, wherein a slit is formed in a peripheral wall portion of the cover, and an elastic deformation portion is formed between the slits. A quick fitting including a stop recess. 11. The quick-connect device according to claim 1, wherein said cover is provided with an opening for allowing movement of said retaining clip in a direction perpendicular to the axis. Pipe fittings. 12. A quick fitting according to claim 1, further comprising stopper means for regulating the movement of said retaining clip in a direction perpendicular to the axis within a predetermined range.