JP3373046B2 - Quick connector - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a quick connector for fluid-tightly connecting ends of pipes such as hoses for sending fluid such as gas or liquid in the field of automobiles or general industries.

[0002]

2. Description of the Related Art Conventionally, as a quick connector of this kind, a male joint joined to the inner end of the large-diameter cylindrical body of a female joint joined to one end of the hose and a male joint joined to the end of the other hose. There is known one in which the outer peripheral surface of the small-diameter cylindrical body is fitted (for example, see Japanese Patent Laid-Open No. 64-12195). This is such that the outer peripheral surface of the tip end portion in the cylinder axis direction of the small diameter cylindrical body and the inner peripheral surface of the large diameter cylindrical body are fluid-tightly connected by a seal ring interposed therebetween, while the small diameter cylindrical body is connected. Of the small-diameter cylinder by engaging an annular locking convex portion projecting from the outer peripheral surface of the base end portion in the axial direction of the cylinder with a locking recess formed in a part of the inner peripheral surface of the large-diameter cylindrical body in the circumferential direction. It is designed to prevent the body from falling out of the large-diameter cylinder. Then, the inner diameter of the ring portion on the tip side of the locking recess of the large-diameter cylinder is made larger than the outer diameter of the small-diameter cylinder on the base end side by a predetermined dimension, and the ring portion is thin and the cylinder of the ring portion is formed. A notch groove is provided in the peripheral wall except the portion where the locking recess is formed at the axial end portion side position, and the ring portion is pressed from both sides in the direction orthogonal to the cylinder axis to reduce the diameter of the locking recess. The diameter of the formed portion is expanded to release the engagement with the locking projection .

[0003]

By the way, in the above-mentioned conventional quick connector, the relative relative movements of the two hoses around the axis are caused only by the sliding friction resistance of the seal ring with respect to the inner peripheral surface of the large-diameter cylindrical body or the outer peripheral surface of the small-diameter cylindrical body. Since the rotation is merely restricted, the large-diameter cylindrical body and the small-diameter cylindrical body may rotate relative to each other due to an external force acting on the both hoses and the like. However, it cannot be said that the large-diameter cylinder and the small-diameter cylinder are always kept in a perfect circular state, and the seal ring is connected to the large-diameter cylinder and the small-diameter cylinder by connecting both cylinders for the first time. It is compressed along the annular gap and elastically deforms, and this tends to change to a plastically deformed state over time. Therefore, when the relative rotation between the large-diameter cylindrical body and the small-diameter cylindrical body occurs, the seal ring that is plastically deformed does not follow the change in the shape of the annular gap between the two, and the adhesion is lost, The relative rotation may cause wear of the seal ring, which may lead to deterioration of the sealability. In particular, if the above-mentioned wear occurs, the sealing property may be deteriorated at an early stage.

When the large-diameter cylinder and the small-diameter cylinder are disconnected and reconnected after being used for a relatively long period of time, that is, after the seal ring has reached a plastic deformation tendency, the small-diameter cylinder is reconnected. It is difficult to reconnect the large-diameter cylinder to the same circumferential position as before it was disconnected, so if the reconnection is made to a different circumferential position from before the disconnection, the relative rotation above Similar to the case where it occurs, there is a possibility that the sealability may be deteriorated.

Further, when a twisting external force such as bending around an axis orthogonal to the cylinder axis acts on both ends of the hose or the connecting portion between the large diameter cylinder and the small diameter cylinder, it is mainly the small diameter that resists this. This is performed by the relative movement restriction in the radial direction due to the substantial contact between the outer peripheral surface of the distal end portion of the cylindrical body and the inner peripheral surface of the large diameter cylindrical body. However, since the length in the cylinder axis direction in which the movement is restricted is relatively short, the large-diameter cylinder and the small-diameter cylinder may be relatively twisted and rock. As a result of this swinging, the seal ring is excessively compressed and the elastic function deteriorates, resulting in insufficient restoration, resulting in deterioration of the sealability and rattling noise .

On the other hand, to the ring portion minutes, some external force may act by other members to grab carelessly is or operator collision, releases the engagement between the small diameter cylinder and the large-diameter cylindrical body there is a risk that is.

The present invention has been made in view of such circumstances, and an object thereof is to prevent the relative sealing from being deteriorated with a structure capable of surely preventing relative rotation. In addition, it is intended to improve the reliability of the connection state particularly in the drawing direction and the direction orthogonal to the cylinder axis.

[0008]

In order to achieve the above object, the invention according to claim 1 provides a tubular female joint to be connected to one of the ends of both pipes to be connected, and the above pipes. A cylindrical male joint which is connected to the other end and is fitted in the female joint to connect the two pipe ends in a mutually communicating state, and the male joint is the other pipe. The female joint has a small-diameter cylindrical body protruding from the end, while the female joint has a large-diameter cylindrical body protruding from one end of the tubular body and having an inner peripheral surface having an inner diameter larger than the outer diameter of the small-diameter cylindrical body by a predetermined dimension. The large-diameter cylindrical body is configured to accommodate the small-diameter cylindrical body in a state of being sealed by a seal ring interposed between the inner peripheral surface of the large-diameter cylindrical body and the tip outer peripheral surface of the small-diameter cylindrical body. It is assumed that what has been done. In this structure, at least one or more stopper members are integrally formed with the small-diameter cylindrical body of the male joint, and each of the stopper members is formed from a part of the outer peripheral surface of the small-diameter cylindrical body in the circumferential direction to the large-diameter cylindrical body. A radial arm portion that protrudes to the inner peripheral surface position in the outer peripheral direction, and a free end side that extends from the tip of the radial arm portion in the cylinder axis direction of the small diameter cylindrical body and is elastically deformable in the radial direction of the small diameter cylindrical body. The cylinder axial direction arm portion is configured, and the locking claw that projects outward in the radial direction from the free end of the cylinder axial direction arm portion. The inner peripheral surface of the large-diameter cylindrical body of the female joint is locked with the locking claws of the stopper members to prevent the small-diameter cylindrical body from moving relatively to the large-diameter cylindrical body in the axial direction of the large-diameter cylindrical body. The engaging recesses are formed, and the circumferential facing surface distances of the engaging recesses and the circumferential widths of the corresponding engaging pawls are set to have substantially the same dimensions . The small-diameter cylindrical body has an outer peripheral surface on the base end side.
To the inner peripheral surface position of the tip opening of the large-diameter cylindrical body in the outer peripheral direction
Form a projecting annular collar, and attach this collar to the above-mentioned small
The state where the locking claw of the large diameter cylinder is engaged with the locking recess of the large diameter cylinder
, So that it is fitted inside the tip opening of the large-diameter cylindrical body.
It The outer circumference of a part of the collar portion of the small-diameter cylindrical body in the circumferential direction.
Form at least one guide protrusion projecting outward in the surface
On the other hand, the cylinder shaft is installed in the circumferential direction at a part of the opening of the tip of the large diameter cylinder.
With the locking claw engaged with the locking recess.
The guide protrusion is formed by forming a guide recess into which the guide protrusion is fitted.
The number of end faces in the circumferential direction and the circumferentially facing faces of the above-mentioned guide recesses is small.
On both sides, the locking claw is guided to the locking recess.
Change the circumferential position of the small diameter cylinder with respect to the large diameter cylinder.
The taper angled toward the forward side of the small-diameter cylinder in the cylinder axis direction.
It is configured to form a transparent surface .

According to a second aspect of the present invention, in the first aspect of the invention, two or more stopper members are evenly arranged in the circumferential direction of the small diameter cylindrical body.

According to a third aspect of the present invention, in the first aspect of the invention, the locking recess is formed by a window portion that penetrates the peripheral wall of the large-diameter cylindrical body in the radial direction.

According to a fourth aspect of the present invention, in the first aspect of the present invention, the locking claw of the small diameter cylinder is engaged with the locking recess on the inner surface of the large diameter cylinder on the base end side. The contact surface is formed so as to come into contact with the tip end surface of the small-diameter cylindrical body to prevent relative movement of the small-diameter cylindrical body toward the forward side in the cylinder axis direction.

According to a fifth aspect of the invention, in the invention according to the first aspect, a part of the outer peripheral portion of the collar portion in the circumferential direction is arranged in the cylinder axis direction.
Place the arm so that it extends toward the tip of the small diameter cylinder, and
The par member is formed integrally with the collar portion .

According to a sixth aspect of the present invention, in the invention according to the first aspect, the outer peripheral surface of the small-diameter cylindrical body is located at an intermediate position in the cylinder axial direction.
A topper member is formed, and the arm portion in the cylinder axial direction is formed of the small-diameter cylinder body.
The configuration is such that it is arranged so as to extend to the base end side .

[0014]

With the above construction, in the invention according to claim 1,
When inserting the small diameter cylindrical body of the male joint into the large diameter cylindrical body of the female type joint, the locking claw of the arm portion of the stopper member in the cylinder axial direction is pressed against the inner peripheral surface of the large diameter cylindrical body and The free end of the directional arm is elastically deformed toward the radially contracted side, and the locking claw enters inside from the tip opening of the large-diameter cylindrical body. Then, the locking claw further advances as the small-diameter cylinder advances, reaches the locking recess, engages with the locking recess, and moves the small-diameter cylinder relative to the large-diameter cylinder in the axial direction of the large-diameter cylinder. Is blocked. In this engaged state, the circumferential facing surface spacing of the locking recesses and the circumferential width of the corresponding locking pawls are set to substantially the same dimension. Therefore, the small diameter cylinder and the large diameter cylinder, that is, Even if the male joint and the female joint try to rotate relative to each other in the circumferential direction, the circumferential end surfaces of the locking claws and the circumferential facing surfaces of the locking recesses come into contact with each other to prevent the relative rotation. Therefore, the circumferential relative positional relationship between the outer peripheral surface of the distal end portion of the small-diameter cylindrical body and the inner peripheral surface of the large-diameter cylindrical body is maintained in the same state as when they were connected, and the two peripheral surfaces are interposed in a compressed state. Even if the mounted seal ring tends to shift to the plastically deformed state, the close contact state between the both circumferential surfaces and the seal ring is maintained. As a result, it is possible to prevent the deterioration of the sealability due to the change in the shape between the peripheral surfaces sandwiching the seal ring due to the relative rotation.

Further, a locking claw that may be engaged with the locking recess and exert a force toward the side of the small-diameter cylindrical body in the axial direction of the cylinder,
Since it is provided at the tip of the cylinder axis direction arm portion extending from the tip of the radial direction arm portion in the cylinder axis direction, the force on the cylinder axis direction detachment side acts substantially as an axial force on the cylinder axis direction arm portion. As a result, the force on the pulling-out side is stronger than that in the case where the force acts as a bending force, and a stronger pullout prevention is achieved. Further, since the radial arm portion of the stopper member is projected in the radial direction from the outer peripheral surface of the small diameter cylindrical body to the position of the inner peripheral surface of the large diameter cylindrical body, relative movement of the small diameter cylindrical body in the radial direction is prevented. It Then, as a result of the relative movement in the radial direction being blocked at the two positions of the radial arm and the tip of the small-diameter tubular body,
Even if external force is applied to the male and female joints to rotate them around the axis orthogonal to the cylinder axis, the joints of both joints will be maintained in the same state securely, and the reliability of the connection state will be improved. In addition, it is possible to prevent the deterioration of the sealing property due to an unbalanced load acting on the seal ring.

Further , a large diameter cylinder is provided on the outer peripheral surface of the small diameter cylinder on the base end side.
The annular collar that protrudes in the outer peripheral direction to the position of the inner peripheral surface of the body
Since it is formed, it is half
Relative movement in all radial directions is blocked
Supported by. And this collar is the base end of the small diameter cylinder.
Since it is formed on the side, the supporting position at the tip of the small diameter cylinder
And the dimension supported in the cylinder axis direction with the above-mentioned support position by the collar
Longer than the above-mentioned external force in the prying direction.
The resistance is exerted more reliably to maintain the same connection state.
To be In addition, with the locking claw engaged with the locking recess,
The collar is fitted inside the tip opening of the large diameter cylinder
Since it is arranged to cover the opening, keep it in the connected state.
To the gap between the inner surface of the large-diameter cylinder and the outer surface of the small-diameter cylinder.
Intrusion of dust and foreign matter is blocked.

Furthermore, the guide protrusion is provided on the collar portion of the small diameter cylinder,
The guide projection is fitted inside with the locking claw engaged with the locking recess.
Guide recesses are formed at the tip openings of the large-diameter cylinders.
Tei because, during the connecting operation of the male joint and the female joint, the upper
With the guide recess as a mark, the guide protrusion is
Determine the relative position in the circumferential direction so that the small diameter cylindrical body has a large diameter
Insert into the cylinder. Then, the tip of the guide protrusion
Is located at any position in the circumferential direction of the opening of the guide recess,
By further advancing the small diameter cylinder,
Of the small-diameter cylindrical body by being guided to the tapered surfaces of the concave portion and the guide concave portion.
Small enough to the circumferential position where the pawl matches the locking recess of the large diameter cylinder.
The tubular body automatically rotates relative to each other, and the guide protrusions
The locking claw also engages with the locking recess in the state of being fitted inside. Servant
The locking recess is part of the circumference and is almost the same as the locking claw.
Even if it is formed in the circumferential dimension, the above-mentioned guide protrusion is externally applied.
Insert the small-diameter cylinder into the large-diameter cylinder while looking at the guide recess and
To the locking recess of the locking claw that cannot be seen from the outside.
The engagement work of is easy and reliable.

According to the second aspect of the present invention, in addition to the operation of the first aspect of the present invention, two or more stopper members are provided and two or more locking claws prevent relative rotation about the cylinder axis. Therefore, the relative rotation of the male joint and the female joint in the circumferential direction can be reliably prevented. In addition, since the two or more stopper members are evenly arranged in the circumferential direction on the outer peripheral surface of the small-diameter cylindrical body, the small-diameter cylindrical body is orthogonal to the large-diameter cylindrical body with respect to the large-diameter cylindrical body by the two or more radial arms. It is supported so that it does not move relative to each other, and the reliability of the above-mentioned connected state is further improved, and the deterioration of the sealing property due to the action of an unbalanced load is further prevented.

According to the third aspect of the invention, in addition to the effect of the first aspect of the invention, the locking recess is formed by a window portion that radially penetrates the peripheral wall of the large-diameter cylindrical body. After engaging the stop claw and the window part to connect the male joint and the female joint, by pressing the locking claw from the outside of the large-diameter cylindrical body through the window part in the radial direction, Is disengaged, and the connection between the male joint and the female joint is released. Therefore, once connected, the connection can be released and reconnected.

According to the invention described in claim 4, in addition to the operation according to the invention described in claim 1, the inner surface of the base end portion of the large-diameter cylinder is brought into contact with the front end surface of the small-diameter cylinder to advance the small-diameter cylinder. Since a contact surface for blocking is formed, and the contact surface and the tip end surface of the small-diameter cylindrical body are contacted with each other with the locking claw engaged with the locking recess, The contact of the small-diameter cylinder with respect to the large-diameter cylinder is prevented from moving forward in the cylinder-axis direction, and at the same time, the relative movement of the small-diameter cylinder from the side in the cylinder-axis direction (retraction side) is blocked. . As a result, the connection between the male joint and the female joint is performed in a state in which relative movement with respect to both sides in the cylinder axis direction is prevented.

According to the invention of claim 5, in addition to the operation of the invention of claim 1, the arm portion in the cylinder axial direction has a brim portion.
Since it is integrally formed from the outer peripheral part, the collar part is
It will also serve as the radial arm of the topper member, and the brim
It becomes possible to integrally form the stopper member with the stopper member.
It Also, the arm portion in the cylinder axis direction extends to the tip side in the cylinder axis direction.
The external force in the pulling direction on the male joint
Ri axial force of the tension side in the cylinder axis direction arm portion you action.

According to the invention of claim 6, in addition to the operation according to the invention of claim 1, an intermediate portion in the cylinder axis direction of the small-diameter cylinder is provided.
The stopper member is formed from the outer peripheral surface of the position
The arms are arranged so as to extend toward the base end side in the cylinder axis direction.
To project from the free end that is the tip of the cylinder axial direction arm part.
When the locking claw is engaged with the locking recess,
The surface on the proximal side and the surface on the tip side in the cylinder axis direction of the locking recess contact
The relative movement of the small-diameter cylinder toward the exit side is blocked.
Growls Then, the outside of the pullout direction to the male joint
By the action of the force, the axial force on the compression side acts on the arm portion in the cylinder axial direction .

[0023]

Embodiments of the present invention will be described below with reference to the drawings.

<First Embodiment> FIGS. 1 and 2 show a quick connector according to a first embodiment of the present invention, in which reference numeral 1 denotes a cylindrical male joint having a cylindrical axis X.
The coupling portion 10 on one end side (the left side in FIGS. 1 and 2) in the direction and the small-diameter cylindrical body 11 on the other end side (the right side in the drawings) are integrally formed by synthetic resin molding. Reference numeral 2 denotes a cylindrical female joint, which includes a coupling portion 20 on one end side (right side in the figure) coaxial with the cylinder axis X and a large-diameter cylindrical body 21 on the other end side (left side in the figure). And are integrally formed by resin molding using synthetic resin or fiber reinforced resin. The male joint 1 is joined by press-fitting the joint portion 10 into one hose end portion of a pair of hose end portions (not shown) as a pair of pipe body end portions to be connected, and a small diameter tubular body. 11 is projected from one end of the hose. In the same manner as above, the female joint 2 is also joined by press-fitting the joining portion 20 into the other end of the hose so that the large-diameter cylindrical body 21 is projected from the other end of the hose. It has become. The large-diameter cylindrical body 21 has an inner peripheral surface 21a having an inner diameter larger than the outer diameter of the outer peripheral surface 11a of the small-diameter cylindrical body 11 by a predetermined dimension, and the diameter of the joint portion 20 is increased. , 2 are accommodated in a state where the small-diameter cylindrical body 11 is arranged inside the large-diameter cylindrical body 21 coaxially with the cylinder axis X, and both hose ends are connected so as to communicate with each other coaxially. Has become. This male joint 1 and female joint 2
And constitute the quick connector of the first embodiment.

The small-diameter cylindrical body 11 has an annular flange portion 12 protruding from the base end portion 11b to the inner peripheral surface 21a of the distal end opening portion 21b of the large-diameter cylindrical body 21 in the outer peripheral direction, and the collar portion 12. Of the outer peripheral portion of each part in the circumferential direction centered on the cylinder axis X (hereinafter, simply referred to as the circumferential direction) and at both sides in the direction orthogonal to the cylinder axis X (vertical direction in FIGS. 1 and 2). A pair of stopper portions 1 as stopper members formed on the
3, 13 and the flange portion 1 at two positions apart from each other in the circumferential direction different from the formation positions of the stopper portions 13, 13.
A pair of guide protrusions 14, 14 protruding outward in the radial direction (hereinafter, simply referred to as the radial direction) about the cylinder axis X from the outer peripheral surface 12a of the two are integrally formed.

The outer peripheral surface 12a of the collar portion 12 is fitted into the inner peripheral surface 21a of the front end opening portion 21b of the large-diameter cylindrical body 21 so that the outer peripheral surface 11a of the small-diameter cylindrical body 11 and the large-diameter cylindrical body 21 are fitted. While covering the annular gap between the inner peripheral surface 21a and the proximal end portion 11b of the small-diameter cylindrical body 11 and the large-diameter cylindrical body 2
The first end opening 21b is positioned coaxially.

Each of the stopper portions 13 has the collar portion 1
2 from the above predetermined position to the side of the tip 11c (see FIGS. 1 and 2).
To the right side; hereinafter, simply referred to as the right side), a cylinder axis direction arm portion 15 extending in the cylinder axis X direction by a predetermined dimension, and a locking claw protruding radially outward from a free end which is a tip end of the cylinder axis direction arm portion 15. 1
6 and. Each locking claw 16 has an orthogonal surface 16a orthogonal to the cylinder axis X on the side of the base end portion 11b (left side in FIGS. 1 and 2; hereinafter simply referred to as left side) and a tapered surface 16b on the right side. It also has both end faces 1 in the circumferential direction.
The interval between 6c and 16c, that is, the circumferential width is set to a predetermined dimension in relation to the window portion 22 described later.

Radial end faces 14a of the guide protrusions 14 described above.
The guide convex portions 14 are formed so as to be substantially flush with the outer peripheral surface of the large-diameter cylindrical body 21 when they are fitted into the guide concave portions 23, which will be described later, while extending both end surfaces at both ends in the circumferential direction. The tapered surfaces 14b, 14b are formed such that the curved surfaces intersect with each other on the right front side and have a lateral V shape.

As shown in FIG. 3, the large-diameter cylinder 21 has a length in the cylinder-axis X direction corresponding to the length from the tip end surface 11d of the small-diameter cylinder 11 in the cylinder-axis X direction to the collar portion 12. In this state, the front end surface 11d of the small-diameter cylindrical body 11 abuts against the contact surface 21d formed on the inner surface of the base end portion 21c, which is orthogonal to the cylinder axis X, and further advancement is prevented. 1
2 is fitted in the distal end opening 21b of the large-diameter cylindrical body 21. A pair of windows 22, 22 as locking recesses are formed in the peripheral wall of the large-diameter tubular body 21 so as to penetrate in the radial direction, and the contact surface 21d is provided with the tip surface 11d of the small-diameter tubular body 11. The window portions 22 are arranged so that the locking claws 16 and 16 engage with the window portions 22 and 22 in a state where the window portions 22 and 22 are in contact with each other. As shown in the enlarged view of FIG. 4, the circumferential width of each window portion 22 is formed to be substantially the same as the circumferential width of each locking pawl 16 so that the circumferential end surface 16c of the locking pawl 16 is formed. In the engaged state, they are arranged so as to closely face and face the circumferentially facing surface 22a of the window portion 22.

The tip end opening 21 of the large-diameter cylindrical body 21 is also provided.
On the inner peripheral side of b, a tapered peripheral surface 21e and a pair of guide recesses 23, 23 are formed. Both guide recesses 2
Reference numerals 3 and 23 denote both guide projections 14 and 14 in a state in which the locking claws 16 of the small-diameter tubular body 11 are engaged with the window portions 22.
Are arranged at various positions in the circumferential direction so that they are fitted inside. Each of the guide recesses 23 is formed such that the depth in the cylinder axis X direction is larger than the length of each guide projection 14 in the cylinder axis X direction (thickness of the collar portion 12), and the circumferential facing surface is formed. Each of the guiding convex portions 14 is formed by laterally facing substantially V-shaped tapered surfaces 23a, 23a corresponding to both tapered surfaces 14b, 14b. Then, each of the guiding concave portions 23 corresponds to each of the guiding convex portions 1 described above.
When the guide recesses 4 are fitted to the innermost portions of the guide recesses 23 on the right side of FIGS. 1 and 2, the locking claws 16 are associated with the window portions 22 so that they engage with the window portions 22. ing.

Then, the base end portion 21c of the large-diameter cylindrical body 21.
A plurality of (two in the illustrated example) seal rings 24, 24 and spacer rings 25, 25 are alternately fitted in advance on the inner peripheral surface of the above. Each of the seal rings 24 includes an outer peripheral surface 11a of a tip portion 11c of the small diameter tubular body 11 and the large diameter tubular body 2.
It is sandwiched between the inner peripheral surface 21a of the base end portion 21c of the first member and is in a compressed state so as to be in close contact with both of the both peripheral surfaces 11a and 21a. The seal with the cylinder 21 is performed.

Next, the operation and effect of the first embodiment will be described.

In order to connect a pair of hose ends by using the male joint 1 and the female joint 2, the connecting portion 10 of the male joint 1 is press-fitted into one hose end and the female die is connected. The joint portion 20 of the joint 2 is press-fitted into the other end of the hose. As a result, the male joint 1 is connected to the one end of the hose with the small-diameter cylinder 11 protruding, and the female joint 2 is connected to the other hose end with the large-diameter cylinder 21 protruding. To be done.

First, the tip portion 11 of the small-diameter cylindrical body 11
c and the front end opening 21b of the large-diameter tubular body 21,
6 and the window portions 22, or the guide convex portions 14 and the guide concave portions 23 face each other so that they are positioned at substantially the same circumferential position in the cylinder axis X direction. Next, when the small-diameter cylindrical body 11 is inserted into the large-diameter cylindrical body 21 substantially in the cylinder axis X direction from this state, the tapered surfaces 16b of the locking claws 16, 16 are
16b hits the taper peripheral surface 21e of the front end opening 21b of the large-diameter cylindrical body 21 to elastically deform each cylindrical axial arm portion 15.
As a result, each locking claw 16 is displaced inward in the radial direction and moved forward along the inner peripheral surface 21a of the large-diameter cylindrical body 21 (see FIG. 5), and the tip surface 11d of the small-diameter cylindrical body 11 has a large-diameter cylinder. By making contact with the contact surface 21d of the body 21, the orthogonal surface 16a of each locking claw 16 engages with each window portion 22, and the connection work between the male joint 1 and the female joint 2 is completed (Fig. 2).

When engaging the locking claws 16 with the windows 22, the small-diameter cylindrical body 11 is inserted into the large-diameter cylindrical body 21 as shown in FIG. Each guide protrusion 14
Is inserted from the entrance of the guide recess 23 of the large-diameter cylindrical body 21 so that either one of the tapered surfaces 14b, 14b of the guide projection 14 has both tapered surfaces 23a, 23 of the guide recess 23.
It contacts either one of a (see the state shown by the solid line in FIG. 6). In this state, by further advancing the small-diameter cylindrical body 11, the guide convex portions 14 are moved along the tapered surfaces 23a of the guide concave portions 23 to form the guide concave portions 23.
Since it slides to the innermost part, the small-diameter tubular body 11 and the large-diameter tubular body 21 are automatically rotated relative to each other around the tubular axis X to form the locking claws 16 and the window portions 22. It can be guided to the same circumferential position as the position. For this reason, by using the combination of the guide convex portions 14 and the guide concave portions 23, both the locking claws 16 and the window portions 22 are formed in part in the circumferential direction, respectively, and the large-diameter cylindrical body is formed. 21 and the locking claws 16 that cannot be seen from the outside by moving forward inside the window 21
It is possible to surely guide the two to engage the both 16, 22 with each other.

When the engaging claws 16 and the windows 22 are brought into engagement with each other, the small-diameter cylindrical body 11 has the tip surface 1 thereof.
The contact of 1d with the contact surface 21d of the large-diameter cylindrical body 21 prevents movement toward the forward side in the cylinder axis X direction, while engaging the orthogonal surface 16a of each locking claw 16 with each window 22. Thus, the movement toward the pull-out side in the cylinder axis X direction is prevented. Therefore, even if an external force (pulling force, pushing force) that relatively moves in the cylinder axis X direction acts between the male joint 1 and the female joint 2, the external force resists the external force and the cylinder axis X direction. Both joints 1 and 2 can be connected in a state in which relative movement with respect to both sides of the joint is surely prevented. In addition, the locking claws 16 on which the pulling force or the like acts are provided from the relatively thick collar 12 to the cylinder axis X.
Since it is supported by the respective cylinder axial direction arm portions 15 extending in the direction, the pulling-out force and the like act on the respective cylinder axial direction arm portions 15 through the respective locking claws 16 as substantially axial forces, whereby As compared with the case where the pull-out force or the like acts as a bending force, it is possible to more strongly resist and more firmly prevent the falling.

Further, in the engaged state, the circumferential end surfaces 16c, 16c of the locking claws 16 closely face and face the circumferential facing surfaces 22a, 22a of the window portions 22, respectively. , An external force (torsion force) for rotating the male joint 1 and the female joint 2 relative to each other in opposite directions around the cylinder axis X.
Even if is applied, the end surface 16c and the facing surface 22a come into contact with and resist this external force, and the both joints 1 and 2 are connected in a state in which relative rotation around the cylinder axis X is reliably prevented. be able to.

Further, in the above engagement state, the tip end portion 11c of the small-diameter cylindrical body 11 is the base end portion 21c of the large-diameter cylindrical body 21.
While contacting the inner peripheral surface and also contacting the base end portion 21c of the large-diameter cylindrical body 21 via each seal ring 24, the relative movement of the small-diameter cylindrical body 11 in the radial direction is prevented. ,
The base end portion 11b of the small-diameter cylindrical body 11 is brought into contact with the outer peripheral surface 12a of the collar portion 12 and the inner peripheral surface 21a of the large-diameter cylindrical body 21 in the radial direction with respect to the tip end opening portion 21b of the large-diameter cylindrical body 21. The relative movement of is blocked. Therefore, an external force (shearing force) between the male joint 1 and the female joint 2 is eccentric in the radial direction in parallel to the cylinder axis X in the opposite directions.
Even if the force acts, the tip portion 11c of the small-diameter cylindrical body 11 and the flange portion 12 resist the external force at two positions separated from each other in the cylinder axis X direction and reliably prevent relative movement in the radial direction. Both joints 1 and 2 can be connected in this state.

In addition, the above-mentioned two positions where relative movement in the radial direction is prevented are separated by a relatively long distance in the cylinder axis X direction, that is, the front end portion 11c and the base end portion 11b of the small-diameter cylindrical body 11. Therefore, even if external bending forces (prying forces) are applied between the male joint 1 and the female joint 2 so as to relatively rotate them in opposite directions about an axis orthogonal to the cylinder axis X, the above-mentioned 2 The joints 1 and 2 can be connected in a state in which the relatively long leg length between the positions resists the bending external force and reliably prevents the relative rotation around the orthogonal axis.

Thus, the male joint 1 and the female joint 2 are
Since it can reliably maintain the same connection state by resisting all the pulling force, pushing force, torsional force, shearing force, and twisting force, the reliability of the connected state is much larger than that of the conventional one. Can be improved. Moreover, since the initial state of the connection can be maintained even when the above-mentioned twisting force, shearing force, and twisting force are applied, the outer peripheral surface 11a of the small-diameter cylindrical body 11 and the large-diameter cylindrical body can be maintained after the connection. The shape between the inner peripheral surface 21a of 21 and the inner peripheral surface 21a is maintained in the same state as when initially connected. As a result, even if the respective seal rings 24 that are in close contact with the peripheral surfaces 11a and 21a shift to a plastic deformation tendency with the passage of time, the close contact state can be maintained, and the contact between the peripheral surfaces 11a and 21a can be maintained. It is possible to prevent the deterioration of the sealing property due to the change of the shape of the sheet due to the relative rotation.

On the other hand, when it becomes necessary to separate the male joint 1 and the female joint 2 from each other, the locking claws 16 are pressed radially inward from both window portions 22 and 22 so that each window portion is pressed. By releasing the engagement with 22, the small-diameter cylinder 11 can be pulled out from the large-diameter cylinder 21. Then, the male joint 1 and the female joint 2 can be reconnected by repeating the above connecting work again. During this reconnection work,
By fitting the small-diameter cylindrical body 11 into the large-diameter cylindrical body 21 so that the pair of guiding convex portions 14 and 14 are fitted into the respective guiding concave portions 23 before separation, the small-diameter cylindrical body 11 is fitted into the large-diameter cylindrical body. It can be reconnected to the body 21 at the same circumferential position as in the connection state before separation. As a result, each seal ring 24 in the large-diameter cylindrical body 21 can be fitted in the same circumferential position as before the separation, and each seal ring 24 of the small-diameter cylindrical body 11 before the separation as described above. Even if the plastic deformation state is reached in a shape corresponding to the outer peripheral surface shape of the tip portion 11c, the tip portion 11c can be brought into close contact with each of the seal rings 24. For this reason, even after reconnection, it is possible to prevent the deterioration of the sealing property due to reconnection to a position different from the circumferential position before separation, and to exhibit almost the same sealing property as before separation. You can

<Second Embodiment> FIGS. 7 and 8 show a quick connector according to a second embodiment of the present invention. In the second embodiment, the collar portion and the stopper member are provided independently of each other.

In the figure, 3 is a cylindrical male joint, 4 is a cylindrical female joint, and the male joint 3 and the female joint 4 are shown.
And constitute the quick connector of the second embodiment.

Similar to the first embodiment, the male joint 3 is connected to one hose end (not shown) at one end side (the left side in FIGS. 7 and 8) in the cylinder axis X direction and the connecting portion 30. , A small-diameter cylindrical body 31 on the other end side (right side in the figure) protruding from the end of the hose
And are integrally formed by synthetic resin molding,
In addition, the female joint 4 is also connected to the other hose end (not shown) at the one end side (right side in the figure) coaxial with the cylinder axis X, and the other hose end. The large-diameter cylindrical body 41 on the other end side (the left side in the figure) protruding from the part is integrally formed by synthetic resin molding.

On the outer peripheral surface 31a of the small-diameter cylindrical body 31, an annular flange portion 32 is provided at the base end portion 31b, and a pair of stopper portions 33 as the stopper members at an intermediate position in the cylinder axis X direction.
And are integrally formed. The flange portion 32 projects from the base end portion 31b in the outer peripheral direction to the position of the inner peripheral surface 41a of the distal end opening portion 41b of the large diameter cylindrical body 41, and the outer peripheral surface 32a thereof is the distal end of the large diameter cylindrical body 41. By fitting in the inner peripheral surface 41a of the opening 41b, the annular gap between the outer peripheral surface 31a of the small-diameter cylindrical body 31 and the inner peripheral surface 41a of the large-diameter cylindrical body 41 is covered, and the small-diameter cylindrical body 31 is formed. The base end portion 31b of the above and the tip end opening portion 41b of the large-diameter cylindrical body 41 are positioned coaxially. Then, at a predetermined position on the outer peripheral surface 32a of the collar portion 32, a pair of guide protrusions 14, 14 having the same structure as in the first embodiment are integrally formed.

Each of the stopper portions 33 has a radial arm portion 34 protruding radially outward from an intermediate position of the outer peripheral surface 31a in the cylinder axis X direction to a position of the inner peripheral surface 41a of the large diameter cylindrical body 41. , A radial direction from a free end which is a tip of the cylindrical axis direction arm portion 35, and a cylindrical axis direction arm portion 35 which extends from the tip end position of the radial direction arm portion 34 toward the proximal end portion 31b by a predetermined dimension in the cylinder axis X direction. And a locking claw 36 protruding outward in the direction. The locking claws 36 are provided on the side of the base end portion 31b on the cylindrical axis X.
Has an orthogonal surface 36a that is orthogonal to, and the distance between the circumferential end surfaces 36b, 36b, that is, the circumferential width is set to a predetermined dimension in relation to the window 42 described later.

In the large-diameter cylindrical body 41, the brim portion 32 is formed in a state where the leading end surface 31d of the small-diameter cylindrical body 31 is in contact with the contact surface 41d of the inner surface of the base end portion 41c and further advancement is prevented. Has a length in the cylinder axis X direction that fits inside the distal end opening 41b of the large-diameter cylinder 41. Then, on the peripheral wall of the large-diameter cylindrical body 41, a pair of windows 42, 4 as locking recesses are formed.
2 is formed so as to penetrate in the radial direction, and both locking claws 36, 36 engage with both window portions 42, 42 in a state where the tip surface 31d of the small-diameter cylindrical body 31 is in contact with the contact surface 41d. The windows 42 are arranged so as to match each other. The circumferential width of each window portion 42 is formed to be substantially the same as the circumferential width of each locking pawl 36, as in the first embodiment, and the locking pawl 3 is formed.
In the engaged state, the circumferential end surface 36b of No. 6 closely faces and faces the circumferential facing surface 42a of the window 42.

Further, the front end opening portion 41 of the large-diameter cylindrical body 41.
A tapered peripheral surface 41e is formed on the inner peripheral side of b, and the pair of guide recesses 23, 23 are engaged with the respective locking claws 36 by the respective window portions 42, as in the first embodiment. In this state, each guiding convex portion 14 is fitted in the innermost portion of each guiding concave portion 23.

Since the other structure of the above quick connector is the same as that of the first embodiment, the same members are designated by the same reference numerals and the description thereof is omitted.

In the case of the second embodiment, in order to connect the pair of hose ends, first, as in the first embodiment,
The distal end portion 31c of the small-diameter tubular body 31 and the distal end opening portion 41b of the large-diameter tubular body 41, the locking claws 36 and the window portions 42, or the guide convex portions 14 and the guide concave portions 23 are tubular. They are made to face each other so as to be positioned at substantially the same circumferential position in the axis X direction. Next, from this state, the small-diameter cylindrical body 31 is moved to approximately the cylinder axis X.
When inserted in the large-diameter cylindrical body 41 in the direction, both locking claws 3
Reference numerals 6 and 36 contact the tapered peripheral surface 41e of the front end opening portion 41b of the large-diameter cylindrical body 41. By pressing the small-diameter cylindrical body 31 as it is, or by pressing the small-diameter cylindrical body 31 while pinching both locking claws 36 and 36 from both sides in the radial direction, each cylindrical axial arm portion 3
5 is elastically deformed and each locking claw 36 is displaced inward in the radial direction, and advances along the inner peripheral surface 41a of the large-diameter cylindrical body 41 (see FIG. 9). The tip surface 31d of the small-diameter cylindrical body 31
Is contacted with the contact surface 41d of the large-diameter cylindrical body 41, the orthogonal surface 36a of each locking claw 36 is engaged with each window 42, and the connection work between the male joint 3 and the female joint 4 is performed. Completed (see Figure 8). At this time, similar to the first embodiment, the combination of the tapered surfaces 14b and 14b of the guide convex portions 14 and the tapered surfaces 23a and 23a of the guide concave portions 23 allows the small-diameter tubular body 31 and the large-diameter tubular body 41 to be combined. The relative rotational position in the circumferential direction is automatically rotated relative to each other so that the locking claws 36 can be guided to the same circumferential position as the formation positions of the windows 42, and the locking claws 36 can be moved to the windows 42. And 36 and 42 can be engaged with each other.

In addition, in the second embodiment, by using the stopper portion 33 having a mode different from that of the first embodiment, it is possible to obtain substantially the same actions and effects as those of the first embodiment. That is, when the engaging claws 36 and the windows 42 are brought into engagement with each other, the male joint 3 and the female joint 4 are pulled out, pushed in, and twisted as in the first embodiment. It is possible to reliably maintain the same connected state by resisting all the force, shearing force, and twisting force, and it is possible to greatly improve the reliability of the connected state as compared with the conventional one. For example, even if a pulling force or a pushing force acts, the small-diameter cylindrical body 31
The front end surface 31d of the abutting member abuts against the abutting surface 41d of the large-diameter cylindrical body 41, so that the movement toward the forward side in the cylinder axis X direction is prevented, while the orthogonal surfaces 36a of the locking claws 36 and the window portions 42 are formed. Due to the engagement of, the movement toward the pull-out side in the cylinder axis X direction is prevented. Even if a twisting force is applied, the circumferential end faces 36c, 36c of the locking claws 36 and the circumferential facing faces 42a of the windows 42,
42a abuts each other to prevent relative rotation around the cylinder axis X. Further, even if a shearing force is applied, the distal end portion 31c of the small-diameter cylindrical body 31 comes into contact with the base end portion 41c of the large-diameter cylindrical body 41 via each seal ring 24, and relative movement in the radial direction is prevented. On the other hand, the base end portion 31b of the small-diameter cylindrical body 31 has the brim portion 3
By contacting the outer peripheral surface 32a of the second outer peripheral surface 32a with the inner peripheral surface 41a of the large-diameter cylindrical body 41, the outer peripheral surface 32a abuts against the distal end opening portion 21b of the large-diameter cylindrical body 21 to prevent relative movement in the radial direction. Further, even if a twisting force is applied, the relative movement in the radial direction is prevented at the above-mentioned two positions, and the two positions are in the cylinder axis X direction of the base end portion 31b and the tip end portion 31c of the small diameter cylindrical body 31. Since they are separated by a relatively long distance, relative rotation around an axis orthogonal to the cylinder axis X is prevented.

As a result, as in the first embodiment, the shape between the outer peripheral surface 31a of the small-diameter cylindrical body 31 and the inner peripheral surface 41a of the large-diameter cylindrical body 41 is maintained in the same state as when initially connected. Even if the seal rings 24 that are in close contact with both the peripheral surfaces 31a and 41a shift to a plastic deformation tendency with the passage of time, the close contact state can be maintained.
It is possible to prevent the deterioration of the sealing property due to the change in the shape between 1a and 41a due to relative rotation or the like.

On the other hand, when the male joint 3 and the female joint 4 are separated from each other, the locking claws 36 are pressed radially inward from both window portions 42, 42 to engage with each window portion 42. By releasing the engagement, the small-diameter cylindrical body 31 can be pulled out from the large-diameter cylindrical body 41. Then, by repeating the above connecting operation again, the male joint 3 and the female joint 4 can be reconnected. At the time of this reconnection work, the small-diameter cylindrical body 31 is internally fitted into the large-diameter cylindrical body 41 so that the pair of guiding convex portions 14 and 14 are fitted into the respective guiding concave portions 23 before being separated. Similarly to the example, the small-diameter cylinder 31 can be reconnected to each seal ring 24 in the large-diameter cylinder 41 at the same circumferential position as the connection state before the separation,
As a result, it is possible to prevent the deterioration of the sealing property due to the reconnection at a position different from the circumferential position before the separation, and it is possible to exhibit substantially the same sealing property as that before the separation .

<Other Embodiments> The present invention is not limited to the first and second embodiments described above, but includes various other modifications. That is, in the first and second embodiments, the stopper portions 13 and 33 are provided in a pair, but
Not limited to this, at least one may be provided, and three or more may be evenly arranged in the circumferential direction. In the case of one, it may be configured so as to be easily elastically deformed in the radial direction and hard to be elastically deformed in the circumferential direction, and in the case of two or more, it is preferable in that the force is dispersed as compared with the case of one .

In the above-mentioned first and second embodiments, a combination of each pair of guide convex portions 14 and 14 and guide concave portions 23 and 23 having the same size and shape is used, but the present invention is not limited to this and, for example, The two pairs of guiding means of each guiding convex portion 14 and each guiding concave portion 23 may have different sizes and shapes. Thereby, in the reconnection work of the small diameter cylinder and the large diameter cylinder, the operator can surely fit the same in the circumferential position before the separation without mistake by the operator. For example, the circumferential width of the one guiding convex portion 14 may be made larger than that of the other guiding convex portion 14, and the circumferential width of the one guiding concave portion 23 may be correspondingly expanded. Further, by providing only one pair of guiding means composed of the guiding convex portion 14 and the guiding concave portion 23 formed on the small-diameter cylindrical body and the large-diameter cylindrical body, or by providing three pairs of guiding means. The same effect as above can be obtained by making only one pair different in size and shape. Further, the tapered surfaces formed on the guide convex portions 14, the guide concave portions 23, and the circumferential end surfaces may be formed on only one of the circumferential end surfaces. Even in this case, the circumferential relative position of the small-diameter cylinder with respect to the large-diameter cylinder can be automatically guided so that the locking claw can surely lock the window.

In the first and second embodiments, the locking claw 1 is used.
Although the locking recesses that engage with 6, 6 are formed by the window portions 22, 42 penetrating in the radial direction, the invention is not limited to this, and the recesses that open to the inner peripheral surface of the large-diameter cylindrical body without penetrating therethrough. You may comprise. In this case, the engaging claws of the stopper portion are completely invisible from the outside during the connecting work, but the engaging claws can be reliably guided to the above-mentioned recesses by the combination of the guide projection 14 and the guide recess 23.

In the first and second embodiments, the end of the pipe body to be connected is the hose end. However, the present invention is not limited to this. For example, the pipe body may be a metal pipe. In this case, the connecting portion may be of a screw type or the like.

Further, in the first and second embodiments,
Male joint, but are formed by the respective synthetic resin molded hand MesugataTsugi, not limited thereto, and may be formed by, for example, metal.

[0059]

As described above, according to the quick connector of the invention as set forth in claim 1, in the engaged state of the both, the circumferential facing surface spacing of the locking recesses and the circumferential direction of the corresponding locking claws. Since the width is set to almost the same size,
Even if the small-diameter cylinder and the large-diameter cylinder, that is, the male joint and the female joint try to rotate relative to each other in the circumferential direction under the action of a torsional force or the like, the circumferential end face of the locking pawl and the locking recess are formed. The relative rotation can be reliably prevented by contacting the circumferentially opposed surfaces of the. Therefore, the shape between the outer peripheral surface of the small-diameter cylindrical body and the inner peripheral surface of the large-diameter cylindrical body can be maintained in the same state as that at the time of the initial connection, and each seal ring adhered to both the peripheral surfaces described above. Even if changes to a plastic deformation tendency over time, the close contact state can be maintained. As a result, it is possible to reliably prevent the deterioration of the sealing property due to the change in the shape between the peripheral surfaces due to the relative rotation or the like.

Further, since the locking claw is provided at the tip of the cylindrical axis arm extending from the distal end of the radial arm in the cylinder axis direction, the force on the cylinder axis removal side is exerted via the locking claw. It acts almost as an axial force on the cylinder axial direction arm portion,
As compared with the case where the force on the pull-out side acts in the bending direction, stronger pull-out prevention can be achieved. Further, since the radial arm portion of the stopper member is projected in the radial direction from the outer peripheral surface of the small-diameter cylindrical body to the inner peripheral surface position of the large-diameter cylindrical body, the large-diameter direction of the small-diameter cylindrical body in the direction orthogonal to the cylinder axis is increased. It is possible to prevent relative movement with respect to the cylindrical body, and it is possible to prevent relative movement in a direction orthogonal to the cylindrical axis at two positions of the radial arm portion and the tip end portion of the small diameter cylindrical body. As a result, even if a twisting external force acts on the male joint and the female joint to rotate the male joint and the female joint about an axis orthogonal to the cylinder axis, the joint state of both joints can be reliably maintained in the same state, It is possible to improve the reliability of the connected state and prevent the deterioration of the sealing property due to the unbalanced load acting on the seal ring.

Further , a large diameter is formed on the outer peripheral surface of the small diameter cylindrical body on the base end side.
An annular brim protruding outwards to the position of the inner surface of the cylinder
Since it is formed with a
Prevents relative movement of small-diameter cylinders in all radial directions
can do. And, this collar part is the base of the small diameter cylinder.
Since it is formed on the end side, the support position at the tip of the small diameter cylinder
And the supporting position of the collar portion in the cylinder axis direction.
Supports external force in the prying direction by supporting it at two positions that are long apart
Even if it does, it is possible to more reliably maintain the same connection state.
it can. In addition, with the locking claw engaged with the locking recess,
Insert the collar into the opening of the tip of the large-diameter cylinder
Since it is arranged to cover the opening,
The gap between the inner peripheral surface of the large diameter cylinder and the outer peripheral surface of the small diameter cylinder
It can prevent dust and foreign matter from entering.

Further, the guide protrusion is formed on the collar of the small diameter cylinder.
The guide claws with the locking claws engaged with the locking recesses.
Is formed in the tip opening of the large-diameter cylinder.
Therefore, when connecting the male and female joints,
Use the guide recess as a mark to insert the guide protrusion into the guide recess.
Determine the relative position in the circumferential direction as
Insertion work can be performed inside. In addition, above
Circumferential direction of guide convex portion and guide concave portion At least one circumferential direction
Since the surface of is a tapered surface,
The locking claws are guided to the mutual tapered surfaces of the
The circumference of the small diameter cylinder to the large diameter cylinder up to the matching circumferential position
The direction relative position can be changed automatically. Obey
The locking recess in a part of the circumferential direction and almost the same circumference as the locking claw.
Even if it is formed in the direction dimension, it may be
While looking at the above-mentioned guide convex portion and guide concave portion,
Locking that is not visible from the outside by inserting into the cylinder
It is possible to easily and reliably engage the claw with the locking recess.
it can.

According to the second aspect of the invention, in addition to the effect of the first aspect of the invention, two or more stopper members are provided and two or more locking claws prevent relative rotation around the cylinder axis. Therefore, the relative rotation of the male joint and the female joint in the circumferential direction can be prevented more reliably. In addition, since two or more stopper members are evenly arranged in the circumferential direction on the outer peripheral surface of the small-diameter cylindrical body, the small-diameter cylindrical body is orthogonal to the large-diameter cylindrical body with respect to the large-diameter cylindrical body by the two or more radial arms. Since it is supported so as not to move relative to each other, it is possible to further improve the reliability of the above-mentioned connected state and further prevent the deterioration of the sealing property due to the action of the unbalanced load.

According to the third aspect of the invention, in addition to the effect of the first aspect of the invention, the locking recess is formed by the window portion that radially penetrates the peripheral wall of the large-diameter cylindrical body. After engaging the locking claw and the window part to once connect the male joint and the female joint, the locking claw is pressed in the radial direction from the outside of the large-diameter cylindrical body through the window part. As a result, the above engagement can be released, and the connection between the male joint and the female joint can be released. Therefore, once connected, the connection can be released and reconnected.

According to the invention of claim 4, in addition to the effect of the invention of claim 1, in addition to the effect of the invention of claim 1, the inner surface of the base end portion of the large-diameter cylindrical body is brought into contact with the front end surface of the small-diameter cylindrical body. Since the contact surface that prevents the forward movement is formed and the contact surface and the tip end surface of the small-diameter cylindrical body are contacted with each other while the locking claw is engaged with the locking recess, By the above contact, the relative movement of the small-diameter cylinder on the forward side in the cylinder axis direction with respect to the large-diameter cylinder can be prevented, and at the same time, the engagement of the locking claw and the locking recess causes the cylinder of the small-diameter cylinder to move. It is possible to prevent relative movement on the axial escape side. Accordingly, the connection between the male joint and the female joint can be performed while the relative movement with respect to both sides in the cylinder axis direction is reliably prevented.

According to the invention described in claim 5, in addition to the effect of the invention described in claim 1, the arm portion in the cylinder axial direction is provided with a collar.
It is formed integrally from the outer peripheral part of the part and the above-mentioned collar part is a stopper
Since it also serves as the radial arm of the member,
It is possible to simplify and facilitate manufacturing .

According to the invention of claim 6, the above-mentioned claim
In addition to the effects of the invention described in 1 , the cylinder axis direction of the small diameter cylinder
A stopper member is formed from the outer peripheral surface of the intermediate position,
The direction arm is arranged so as to extend toward the base end side in the cylinder axis direction.
The locking claw protruding from the free end that is the tip of the arm part in the cylinder axis direction
With the locking claw engaged with the locking claw,
The surface and the surface of the locking recess on the tip side in the axial direction of the cylinder come into contact with each other
Preventing relative movement toward the side of the body
To prevent relative rotation of the small diameter cylinder and
It is possible to prevent movement .

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a first embodiment of the present invention.

FIG. 2 is a partially cutaway sectional view showing a connection state of the first embodiment.

FIG. 3 is a partially cutaway sectional view showing the female joint of the first embodiment.

4 is a partially enlarged cross-sectional view taken along the line AA of FIG.

FIG. 5 is a cross-sectional view corresponding to FIG. 2 in the middle of the connection work of the first embodiment.

FIG. 6 is an enlarged partial front view showing a fitting process of the guide protrusion and the guide recess.

FIG. 7 is an exploded perspective view showing a second embodiment.

FIG. 8 is a partially cutaway sectional view showing a connection state of the second embodiment.

FIG. 9 is a cross-sectional view corresponding to FIG. 8 in the middle of the connection work of the second embodiment .

[Explanation of symbols]

1, 3 tip of the male coupling 2, 4 MesugataTsugi hand 11,3 1 diameter cylinder 11a, 31 a small diameter cylindrical body of the outer peripheral surface 11b, 31 b diameter tubular body proximal end 11c, 31 c small cylinder parts 11d, 31 d diameter tubular body of the distal end surface 12,3 2 flange portion 12a, 32 a flange portion outer peripheral surfaces 13, 33 stopper portion (stopper member) 14 guiding projections 14b tapered surface 15, 35 the cylinder axis arms 16, 36 locking claw 21,4 1 large-diameter cylindrical body 21a, 41a inner peripheral surface 21b of the large-diameter cylindrical member, 41b large-diameter cylindrical body of the front end opening portion 21c, 41c large-diameter cylindrical member of the base end portion 21d, 41d Contact surfaces 22, 42 of large-diameter cylindrical body Window portions (locking concave portions) 22a, 42a Circumferentially facing surfaces 23 of window portions 23 Guide concave portion 23a Tapered surface 24 Seal ring X Cylindrical shaft

Claims (6)

(57) [Claims] 1. A tubular female joint which is connected to one of both ends of the pipes to be connected, and a tubular female joint which is connected to the other end of the both pipes and internally fitted in the female joint. It is composed of a cylindrical male joint connecting the body end portions in a state of communicating with each other, the male joint comprises a small diameter cylindrical body protruding from the other pipe end portion, while the female joint is the one A large-diameter cylindrical body having an inner peripheral surface protruding from the end of the tubular body and having an inner diameter larger than the outer diameter of the small-diameter cylindrical body by a predetermined dimension, and the large-diameter cylindrical body has an inner peripheral surface and the small-diameter cylindrical body. A quick connector configured to accommodate the small-diameter cylindrical body in a state of being sealed by a seal ring interposed between the outer peripheral surface of the tip portion, and at least one or more in the small-diameter cylindrical body of the male joint. Stopper members are integrally formed, and each stopper member is
A radial arm portion protruding in the outer peripheral direction from a part of the outer peripheral surface of the small-diameter cylindrical body in the circumferential direction to an inner peripheral surface position of the large-diameter cylindrical body, and a cylinder axis of the small-diameter cylindrical body from the tip of the radial arm portion. Direction axial direction, the free end side is configured to be elastically deformable in the radial direction of the small diameter cylindrical body, and the locking claw protruding outward in the radial direction from the free end of the cylindrical axis direction arm portion. The inner peripheral surface of the large-diameter cylindrical body of the female joint is engaged with the locking claws of the stopper members, and the small-diameter cylindrical body is pulled out in the cylinder axial direction with respect to the large-diameter cylindrical body. Locking recesses for preventing relative movement to the side are formed, and the circumferential facing surface distances of the locking recesses and the circumferential widths of the corresponding locking pawls are set to have substantially the same dimensions .
The above-mentioned small-diameter cylinder has a large-diameter cylinder from the outer peripheral surface on the base end side.
An annular shape protruding in the outer peripheral direction up to the inner peripheral surface position of the tip opening
A collar portion is formed, and in this collar portion, the locking claw of the small-diameter cylindrical body locks the large-diameter cylindrical body.
While engaging with the recess,
It is arranged so that it fits in, and the outer peripheral portion is on the outer peripheral surface of a part of the flange portion of the small diameter cylindrical body in the circumferential direction.
At least one guide protrusion projecting in the direction
On the other hand, in the circumferential direction part of the opening of the tip of the large diameter cylinder,
With the locking claws engaged with the locking recesses.
Guide recesses are formed in which the guide protrusions are fitted, and both circumferential end faces of the guide protrusions and circumferential guide pairs of the guide recesses are formed .
The locking claw has a locking recess on at least one of the facing surfaces.
Direction of the small-diameter cylinder with respect to the large-diameter cylinder so that
Change the orientation position and direct it to the forward side of the small-diameter cylinder in the cylinder axis direction.
A quick connector characterized by a diagonal tapered surface . 2. The quick connector according to claim 1, wherein two or more stopper members are evenly arranged in the circumferential direction of the small diameter cylindrical body. 3. The quick connector according to claim 1, wherein the locking recess is formed by a window portion that penetrates a peripheral wall of the large-diameter cylindrical body in a radial direction. 4. The inner surface on the base end side of the large-diameter tubular body according to claim 1, wherein the locking claw of the small-diameter tubular body is engaged with the locking recess, and A quick connector having a contact surface that abuts and prevents relative movement of the small-diameter cylindrical body toward the forward side in the cylinder axis direction. 5. The small-diameter cylinder according to claim 1, wherein the cylindrical axial arm extends from a part of the outer peripheral portion of the collar in the circumferential direction.
The stopper member is installed so that it extends toward the tip of the body.
A quick connector that is integrally formed with the collar . 6. The stopper member according to claim 1, wherein the outer peripheral surface of the small-diameter cylindrical body is at an intermediate position in the cylinder axis direction.
Is formed, and the arm portion in the cylinder axial direction is formed on the base end side of the small diameter cylinder.
A quick connector that is arranged to extend .