JPH05203089A - Quick connector - Google Patents

Abstract

PURPOSE:To provide a quick connector of high reliability in piping with strong detent force by a pawl part of a stop pawl member. CONSTITUTION:A connector is constituted of a tubular male member 1 having an insertion end part 10 and a ring-shaped protrusive part 11 in the point end part, tubular female member 2 having an opening 24, ring-shaped fitting internal peripheral surface 20j fitted to the point end of the insertion end part 10, ring- shaped restricting internal peripheral surface 25 and a ring-shaped stopper surface 26 along a shaft right angle direction and a stop pawl member 3 having a suitable number of arm parts 31 and pawl parts 32 capable of elastic deformation in a radial direction. When the stop pawl member 3 is moved toward the opening 29 along an axial center direction of the female member 2 by an internal pressure of the connector or hand work, the pawl part 32 is pressed to the stopper surface 26 while restricted by the restricting internal peripheral surface 25. Thus, displacement of the pawl part 32 in the shaft center and right angle directions is impeded, to stop the pawl part 32 to the ring-shaped protrusive part 11 of the insertion end part 10 of the male member 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piping quick connector for connecting hoses, pipes, etc. for transferring fluids such as gasoline, oil, water and air.

[0002]

2. Description of the Related Art As a quick connector, as shown in FIG. 24, a ring-shaped engaging portion 101 having a tapered surface 101a.
A tubular male member 100 having an insertion end 102 with
Cylindrical female member 20 having receiving hole 202 having opening 201
0 and a resin-made locking claw member 300 held in the receiving hole 202 of the female member 200 are known (Japanese Utility Model Laid-Open No. 64-41794). A window 204 penetrating in the thickness direction is formed in the female member 200.
A tapered surface 205 is formed on the peripheral wall on the side of the opening 201 that defines the partition. The locking claw member 300 includes an arm 302 and a claw 3.
With 03. In this case, the insertion end portion 102 of the male member 100 is inserted into the receiving hole 202 through the opening 201, and the claw portion 303 of the locking claw member 300 is displaced in the centrifugal direction by the ring-shaped locking portion 101, and the ring-shaped locking is performed. When the part 101 gets over the claw 303, the elastic force of the arm 302 restores the claw 30.
3 is locked to the vertical surface 101b of the ring-shaped locking portion 101, whereby the male member 100 and the female member 200 are connected.

Further, as a quick connector, as shown in FIG. 25, a window 204 formed in the female member 200 and penetrating in the thickness direction is formed, and a vertical surface 207 is formed on the peripheral wall on the side of the opening 201 which defines the window 204. Something that has been done is also known.
Further, as a quick connector, as shown in FIG. 26, one using a locking claw member 500 exposed to the outside of the female member 400 is also known. The locking claw member 500 includes a ring-shaped base portion 501 that is exposed to the outside, an arm portion 502 that extends axially from the base portion 501, a claw portion 503 that extends at the tip of the arm portion 502, and a claw. And a locking projection 504 extending in the centrifugal direction of the portion 503 (USP 50428).
48). A stopper surface 403 and a restriction inner peripheral surface 405 extending in the axial direction are formed on the opening 401 side of the female member 400. In this case, the claw portion 503 is locked to the groove-shaped ring-shaped locking portion 602 of the male member 600, and the locking projection 504 is regulated by the regulation inner peripheral surface 405 while being in contact with the stopper surface 403. , By this, the male member 600 and the female member 4
00 and are connected.

[0004]

In the quick connector shown in FIG. 24, the ring-shaped locking portion 1 of the male member 100 is used.
The top edge of the No. 01 tapered surface 101a becomes round with use. Therefore, when a large force acting on the male member 100 to come out of the female member 200 is applied, a large centrifugal force is applied to the claw portion 303 of the locking claw member 300. In this case, the locking force of the claw portion 303 decreases. Further, when the male member 100 is displaced relative to the female member 200 radially outward, that is, in the direction of the arrow M2, the claw portion 303 is pressed against the tapered surface 205 by the peripheral wall portion 100c rearward of the ring-shaped locking portion 101. Therefore, the claw portion 303 may be displaced along the tapered surface 205 in the centrifugal direction, that is, the direction of the arrow M1. Also in this case, the locking force of the claw portion 303 is reduced. Therefore, the reliability of piping is not sufficient.

Further, the locking claw member 300 does not move in the female member 200 in the axial direction, that is, in the arrow X1 direction.
Therefore, when connecting the male member 100 and the female member 200, the tapered surface 10 of the ring-shaped protrusion 101 of the male member 100 is connected.
When the claw portion 303 is lifted in the centrifugal direction by the la, the tapered surface 205 interferes with the lifting claw portion 303, and the claw portion 303
There is great resistance to lifting.

In the quick connector shown in FIG. 25, there are problems similar to those described above, the reliability of the piping is not sufficient, and the lifting resistance of the claw portion 303 is large. In particular, the edge 207a at the lower end of the vertical surface 207 of the window 204 is rounded with use. In this case, the claw portion 303 is easily separated, and the locking force by the claw portion 303 is reduced. Furthermore,
In the quick connector shown in FIG. 26, most of the locking claw member 500 is exposed to the outside of the female member 400, so that the locking member 500 easily touches other devices. There is a risk of disconnection, and the reliability of the piping is not sufficient.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a quick connector in which the locking force of the claw portion of the locking claw member is strong and the reliability of the pipe is improved.

[0008]

SUMMARY OF THE INVENTION A connector of the present invention comprises a cylindrical male member having an insertion end portion having a tip portion and a ring-shaped locking portion behind the tip portion, and an insertion end portion of the male member. And a receiving hole having an opening into which the ring-shaped locking portion is inserted, a receiving surface that defines the receiving hole, and has a ring-shaped stopper surface that faces the openings formed in order from the opening toward the back, and extends in the axial direction. Between a cylindrical female member having a peripheral surface, an inner peripheral surface that is built in the receiving hole of the female member and forms the receiving hole of the female member, and an outer peripheral surface of the insertion end portion of the male member that is inserted into the receiving hole. A ring-shaped base portion that is movably interposed along the axial direction, a plurality of arm portions that extend along the substantially axial direction of the female member from the base portion toward the opening, and that are elastically deformable in the radial direction, A locking claw member that has a claw part that is extended to the arm part and that is locked to the ring-shaped locking part of the male member;
By moving the locking claw member toward the opening along the axial direction of the female member, the claw portion of the locking claw member is restricted to the stopper surface while restricting the movement in the centrifugal direction at the restriction inner peripheral surface. The present invention is characterized in that pressing and locking of the claw portion of the locking claw member and the ring-shaped locking portion of the insertion end of the male member are performed.

[0009]

The operation of the quick connector of the present invention will be described together with its method of use. To connect the male and female members,
The insertion end of the male member is inserted into the receiving hole of the female member through the opening of the female member. Then, the arm portion and the claw portion of the locking claw member are lifted along with the insertion, and when the insertion end portion is inserted to the locking position, the claw portion and the ring-shaped locking portion are locked. In this state,
When the male member relatively moves in the axial direction away from the female member, the locking claw member moves together with the male member in the axial direction of the female member toward the opening. Thereby, the claw portion is fitted into the space defined by the regulated inner peripheral surface of the female member, and further,
The claw portion contacts the stopper surface of the female member, and the displacement of the claw portion in the axial direction is restricted by the stopper surface. At this time, since the restriction inner peripheral surface of the female member is positioned radially outward of the claw portion and the claw portion and the restriction inner peripheral surface are engaged with each other, the displacement of the claw portion in the centrifugal direction is restricted, and the ring-shaped engagement is restricted. The disengagement of the claw from the stop is prevented.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the quick connector of the present invention will be described below with reference to FIGS. FIG. 1 shows a partially cut side view of the state after connecting the connectors. FIG. 2 is a plan view, and FIG. 3 is a partially cut side view showing a process of connecting. FIG. 4 is a partially cut side view showing a state before connecting the connectors.

(Structure) The connector of this embodiment is composed of a male member 1, a female member 2 and a locking claw member 3 as shown in FIGS. The male member 1 has an insertion end 10 made of a thin metal pipe. The insertion end 10 is the tip 1.
0r and a ring-shaped protrusion 11 that is provided in the rear of the tip portion 10r and protrudes in the centrifugal direction. The ring-shaped protrusion 11 is formed by expanding the peripheral wall of the insertion end 10. A conical guide portion 10a is formed on the tip portion 10r of the insertion end portion 10 to facilitate insertion.

The female member 2 is formed of a first socket portion 22 having a female screw portion 22a and a second socket portion 20 having a male screw portion 20a. Female screw part 22a and male screw part 2
The first socket portion 22 and the second socket portion 20 are detachably connected by screwing with 0a. The first socket portion 22 has a cylindrical receiving hole 23 having a circular opening 24.
And a retreat space 22 penetrating the peripheral wall of the first socket portion 22.
with r. Further, on the opening 24 side of the inner peripheral surface of the first socket portion 22, a ring-shaped restricting inner peripheral surface 25 extending in the axial direction is formed. Between the regulation inner peripheral surface 25 and the opening 24, a ring-shaped stopper surface 26 facing the opening 24 is provided.
Are formed. The stopper surface 26 is formed so as to be perpendicular to the axis, that is, vertically. Further, as shown in FIG. 4, the second socket portion 20 has ring-shaped holding surfaces 20h and 20i.
And a ring-shaped holding surface 22h is formed in the first socket portion 22, and the holding surfaces 20h and 20i and the holding surface 22 are formed.
A ring-shaped bush 27 is sandwiched between h and h. Further, the second socket portion 20 is formed with a seal groove 22t, a seal inner peripheral surface 20c having an inner diameter larger than the outer diameter of the insertion end portion 10, and a fitting inner peripheral surface 20j corresponding to the outer diameter of the insertion end portion 10. Has been done. The seal inner peripheral surface 20c is provided with an O-ring 28 as a seal member and a ring-shaped collar 29.

6 and 7 show the locking claw member 3. The locking claw member 3 is made of resin, and has a ring-shaped base portion 30 having a central hole 30i, a plurality of elastically deformable arm portions 31, and a claw portion 32 extending from the tip of each arm portion 31. The base 30 has a protrusion 33 protruding toward the opening 24. The locking claw member 3 is
It is installed in the receiving hole 23 of the first socket portion 22 and is movable along the axial direction of the first socket portion 22. The arm portion 31 of the locking claw member 3 moves from the shaft end surface 30k of the ring-shaped base portion 30 toward the opening 24 of the first socket portion 22 in the first direction.
Two sockets 22 extend in a bifurcated shape substantially along the axial direction. The claw portion 32 is extended to the tip of the arm portion 31, and as shown in FIG. 6, the engaging surface 3 that is substantially perpendicular to the axial direction.
2a and taper surface 32d inclined with respect to the axial direction
And a contact surface 32c that is substantially perpendicular to the axial direction.
As shown in FIG. 4, the outer diameter of the locking claw member 3 is substantially equal to the inner diameter of the receiving hole 23 of the female member 2. The locking claw member 3 is built in the receiving hole 23 of the female member 2 and is not exposed to the outside of the female member 2.

(Operation) Now, the operation of connecting the quick connectors of this embodiment will be described together with the operation thereof. That is, in the state shown in FIG. 4, the insertion end portion 10 of the male member 1 is
Is relatively moved in the direction of arrow X1 and inserted into the receiving hole 23 through the opening 24 of the first socket portion 22 of the female member 2. Then, as shown in FIG. 3, the locking claw member 3 is retracted so that the base 30 contacts the shaft end surface of the bush 27, and the insertion end 10
The tip end portion 10r is fitted to the fitting inner peripheral surface 20j of the female member 2. At this time, as the insertion end 10 is inserted into the receiving hole 23, the ring-shaped protrusion 11 of the insertion end 10 pushes up the claw portion 32 as shown in FIG. Bends in the C2 direction. As shown in FIG. 3, the bent claw portion 32 retreats into the retreat space 22r. When the insertion is further advanced and the ring-shaped protrusion 11 of the insertion end portion 10 gets over the claw portion 32, the arm portion 31 and the claw portion 32 are elastically exerted by themselves in the centripetal direction, that is, the arrow C1 direction, as shown in FIG. It is restored and locked with the ring-shaped protrusion 11 of the male member 1.

Thereafter, when internal pressure is applied to the distal end surface of the female member 2 or the male member 1 is pulled during use, the male member 1 relatively moves in the direction of arrow X2, so that the male member 1 has a ring shape. The protrusion 11 moves in the same direction. Therefore, the ring-shaped protrusion 11 pushes the claw portion 32 in the same direction, the locking claw member 3 moves toward the opening 24 along the axial direction of the female member 2, and is surrounded by the regulation inner peripheral surface 25. The claw portion 32 is fitted to the. Further, as shown in FIG. 1, the contact surface 32c of the claw portion 32 of the locking claw member 3 is pressed against the stopper surface 26,
The displacement of the claw portion 32 and the male member 1 in the axial direction is restricted. At this time, as shown in FIG. 1, since the extended outer surface 32k of the claw portion 32 of the locking claw member 3 is positioned and engaged inside the regulation inner peripheral surface 25, the claw portion 32 in the centrifugal direction is not engaged. The displacement is regulated by the regulation inner peripheral surface 25. Therefore, the claw portion 32 cannot be detached in the centrifugal direction, the locking force by the claw portion 32 becomes reliable, and the reliability of the pipe is secured. .

When the connection between the male member 1 and the female member 2 is released, the pawl remover 5 shown in FIG. 5 can be used. The claw remover 5 has a central hole 5 that is inserted into the insertion end 10.
0 and a cylindrical portion 52 having a tapered contact surface 51 at the tip
And a flange portion 53 extending on the outer peripheral surface of the tubular portion 52. Then, as shown in FIG. 5, the male member 1 is pushed in the direction of arrow X1 with respect to the female member 2, the locking claw member 3 is retracted in the direction of arrow X1, and the claw portion 32 faces the retreat space 22r. In this state, the tip of the tubular portion 52 of the pawl disengagement tool 5 is pushed into the opening 24 of the first socket portion 22, and the contact surface 51 at the tip of the pawl disengagement tool 5 is attached to the claw portion 32 of the locking claw member 3.
It is pressed against the surface 32d. Then, the arm portion 3 of the locking claw member 3
1, the claw portion 32 is pushed up in the centrifugal direction, that is, the direction of the arrow C2, while the claw portion 32 is bent.
Leave from 1. When the insertion end portion 10 of the male member 1 and the second socket portion 20 are pulled apart in the axial direction in this separated state, the male member 1 and the female member 2 are easily separated in a short time.

(Effect) As described above, in the quick connector of this embodiment, the locking claw member 3 is bent in the axial direction of the female member 2 when the male member 1 is inserted into the receptacle 24 of the female member 2. And moves toward the opening 24 of the female member 2, the claw portion 32 of the locking claw member 3 is pressed against the stopper surface 26,
The displacement of the claw portion 32 in the axial direction is restricted. At this time, since the claw portion 32 of the locking claw member 3 is fitted on the regulation inner peripheral surface 25 and the displacement of the claw portion 32 in the centrifugal direction is restricted, the claw of the locking claw member 3 from the ring-shaped projection 11 is restricted. The detachment of the portion 32 is prevented, the high locking force by the claw portion 32 is maintained, and the male member 1 and the female member 2 can be connected with high reliability.

In use, as shown in FIG. 1, the internal pressure acts in the direction of pushing the insertion end 10, that is, in the direction of arrow X2. Therefore, the rear surface 11b of the ring-shaped protrusion 11 of the insertion end 10 is formed.
Since the claw portion 32 biases the claw portion 32, the locking force of the claw portion 32 during use becomes more reliable. Further, in the quick connector of the present embodiment, as can be understood from FIG. 1, the outer diameter of the tip end portion 10r of the insertion end portion 10 of the male member 1 and the inner diameter of the fitting inner peripheral surface 20j of the female member 2 are substantially the same. Therefore, when the insertion end portion 10 of the male member 1 is fitted to the fitting inner peripheral surface 20j of the female member 2, the rattling of the tip portion 10r in the direction perpendicular to the axis is restricted. Further, the claw portion 32 of the locking claw member 2 is provided with the regulation inner peripheral surface 2
Since it is fitted in 5, the rattling of the ring-shaped projection 11 in the direction perpendicular to the axis is also restricted by the restriction inner peripheral surface 25. Therefore, the rattling restriction distance is in the range indicated by L ₁₀ in FIG. 1 and is long, so rattling in the swinging direction of the male member 1 and the female member 2, that is, in the directions of the arrows W1 and W2 is prevented.

By the way, the internal pressure of the female member 2 acts on the O-ring 28 via the minute gap m between the tip portion 10r of the insertion end portion 10 and the fitting inner peripheral surface 20j of the female member 2 to cause the O-ring 28. May be displaced in the axial direction, and may adversely affect the locking claw member 3. In this case, the arm portion 31 of the locking claw member 3 may bend and the locking force of the claw portion 32 may be weakened. In this respect, in this embodiment, as can be understood from FIG. 1, the second socket portion 20 and the first socket portion 22 are provided.
The ring-shaped bush 27 is clamped and fixed by and. Therefore, even if the internal pressure of the female member 2 acts on the O-ring 28 and the O-ring 28 is displaced in the axial direction, the displacement of the O-ring 28 is regulated by the bush 27. It is avoided that the locking force of the part 32 is adversely affected.

Further, in the quick connector of this embodiment, the retraction space 22r is formed in the peripheral wall of the first socket portion 22. Therefore, as shown in FIG. 3, when the ring-shaped protrusion 11 of the insertion end portion 10 crosses over the claw portion 32 of the locking claw member 3, the claw portion 32 and the arm portion 31 that are pushed and expanded in the centrifugal direction, that is, the arrow C2 direction. Does not interfere with the peripheral wall of the first socket portion 22 and retreats into the retreat space 22r. Therefore, it is advantageous to reduce the outer diameter dimension D1 of the first socket portion 22. Moreover, in this embodiment, as shown in FIG. 1, when the male member 1 and the female member 2 are connected, the locking claw member 3 is located inward of the outer peripheral surface 22u of the first socket portion 22, so that the external It is advantageous to prevent the device of FIG.

Further, in the quick connector, in order to make the insertion load proper when inserting the male member 1 into the female member 2, the axial length of the arm portion 31 of the locking claw member 3 is set to a predetermined value. The above is preferable. However, when the axial length of the arm portion 31 of the locking claw member 3 is long, the male member 1
When is inserted into the female member 2, the insertion distance becomes longer by the length of the arm portion 31. That is, the male member 2 is inserted by an extra distance α1 (see FIG. 5) until the ring-shaped locking portion 11 contacts the shaft end surface 30k of the base portion 30 of the locking member 3. The longer the arm portion 31, the longer the distance α1. If the distance α1 is long, in order to avoid collision between the guide portion 10a and the end surface 20s of the female member 2 when the insertion end portion 10 is inserted, the axial length β1 of the fitting inner peripheral surface 20j also needs to be made longer, and the quick This leads to an increase in the axial size of the connector. In this respect, in this embodiment,
As can be understood from FIGS. 5 and 6, the base portion 3 of the locking claw member 2 is
0 has a protrusion 33 protruding from it, and the ring-shaped locking portion 11 abuts on the end surface 33x of the protrusion 33. Therefore, the ring-shaped protrusion 11 immediately contacts the end surface 33x of the protrusion 33 when it gets over the claw portion 32. Since they are in contact with each other, excessive insertion of the insertion end 10 of the male member 1 is avoided, and an increase in the axial size of the quick connector is avoided.

(Other Embodiments) FIG. 8 shows a quick connector according to a second embodiment of the present invention. The quick connector of this example has basically the same configuration as that of the above-mentioned embodiment, and those having the same functions are designated by the same reference numerals. However, in this embodiment, the first socket portion 22 has a spring 4 as a biasing member.
Is built in. The spring 4 is a metal coil spring, is located in the receiving hole 23 of the first socket portion 22, and has a seat surface 27t of the bush 27 and a spring seat surface 30a of the base portion 30 of the locking claw member 3.
It is interposed between and. The spring 4 attaches the locking claw member 3 to the first
The socket portion 22 is urged toward the opening 24 of the first socket portion 22 along the axial direction, and the claw portion 32 of the locking claw member 3 is pressed against the stopper surface 26 while being restricted by the restriction inner peripheral surface 25. ..

FIG. 9 shows a quick connector according to the third embodiment of the present invention. This example has basically the same configuration as that of the second embodiment, and those having the same functions are designated by the same reference numerals. However, in this embodiment, the insertion end 10 of the male member 1 is provided with a groove-shaped ring-shaped locking portion 13. Further, a locking projection 22t is formed on the end of the peripheral wall of the first socket portion 22, and the locking projection 22t is formed in the second socket portion 20.
The first socket portion 22 and the second socket portion 20 are connected to each other by being locked to the standing wall portion 20m.

FIG. 10 shows a quick connector according to the fourth embodiment of the present invention. This example has basically the same configuration as that of the embodiment shown in FIG. 9, and parts having the same functions are designated by the same reference numerals. However, in this embodiment, the spring 4 is not provided, and the male member 1 and the locking claw member 3 are moved in the direction of the arrow X2 by the internal pressure of the female member 2 to move the locking claw member 3 toward the opening 24. It is a method to let. The first socket portion 22 and the second socket portion 20 are joined by welding.

A quick connector according to the fifth embodiment of the present invention is shown in FIGS. This example has basically the same configuration as that of the first embodiment, and those having the same functions are designated by the same reference numerals. However, in this embodiment, the spring 4 is provided on the end surface 20s of the second socket portion 20 and the fitting inner peripheral surface 20j. Then, when the male member 1 is inserted, the spring 4 presses and urges the guide portion 10a of the male member 1, thereby moving the male member 1 and the claw member 3 in the direction of the arrow X2, and the locking claw member 3 The claw portion 32 is pressed against the stopper surface 26 while being restricted by the restriction inner peripheral surface 25.

FIG. 13 shows a quick connector according to the sixth embodiment of the present invention. This example has basically the same configuration as the first example, but a bent portion 31y that bends in the centrifugal direction is formed at the base of the arm 31 of the claw member 3, and the arm 31 is bent in the centrifugal direction. Making it easier. FIG. 14 shows a seventh embodiment of the present invention.
Shown in. In this example, the stopper surface 26 of the female member 2 is inclined in the direction away from the opening 24.

FIG. 15 shows a quick connector according to the eighth embodiment of the present invention. In this example, the claw portion 32 of the locking claw member 3 is formed with a tapered surface 32f. Therefore, when the locking claw member 3 moves in the direction of the arrow X2, the tapered surface 32f is pressed against the stopper surface 26, thereby urging the claw portion 32 in the direction of the arrow C4, and the claw portion 32 and the ring-shaped protrusion 11 are urged.
The effect of increasing the locking force with can be expected.

FIG. 16 shows a quick connector according to the ninth embodiment of the present invention. In this example, the stopper surface 26 of the female member 2
Has a tapered shape whose inner diameter decreases toward the opening 24, and faces the tapered surface 32f of the claw portion 32 of the locking claw member 3. A quick connector according to a tenth embodiment of the present invention is shown in FIGS. This example has basically the same configuration as the first example. However, in this example, a concave detent engagement portion 22m extending from one end of the receiving hole 23 toward the opening 24 is formed on the inner peripheral surface of the first socket portion 22. As shown in FIG. 20, the engaged portion 22m has a conical surface portion 22x extending from one end of the receiving hole 23 toward the opening 24 while narrowing the width, and a rectangular shape extending in the direction with a constant width. And part 22y. In addition, as shown in FIG. 21, the rotation-stopping engaged portions 22m are formed in a pair on the inner peripheral surface of the first socket portion 22 symmetrically in the diameter direction of the first socket portion 22, and the engaged portion 22m. Rectangular part 22y
The width L ₂₂ is slightly larger than the width L ₂₃ (see FIG. 19) of the protrusion 33 formed on one end surface of the ring-shaped base portion 30 of the locking claw member 3.

As shown in FIG. 19, the protrusions 33, 33 of the locking claw member 3 have a convex detent engagement portion 33a protruding by ΔE toward the centrifugal direction of the ring-shaped base portion 30, The female member 2 is formed so as to be engaged with the concave detent engagement portion 22m of the first socket portion 22 of the female member 2. Therefore, relative displacement of the locking claw member 3 and the female member 2 in the circumferential direction is prevented. Also in this sense, the locking force by the claw portion 32 becomes reliable. Of course, the detent engagement portions 33a, 33
It is also possible to make a a concave inward in the radial direction and make the rotation-stopping engaged portions 22m, 22m convex.

The quick connector of the eleventh embodiment of the present invention will be described with reference to FIG. In this example, the insertability of the male member 1 into the female member 2 and the withdrawal property of the male member 1 from the female member 2 in the quick connector of the first embodiment are optimized. Here, qualitatively speaking, the insertability of the male member 1 into the female member 2 is such that when the claw portion 32 of the locking claw member 3 gets over the ring-shaped protrusion 11 of the male member 1, The ring-shaped protrusion 11 receives an appropriate resistance force from the claw portion 32 of the locking claw member 3, and then the resistance force is rapidly reduced, so that the worker of the male member 1 can receive the female member of the male member 1 when connecting the quick connector. It is preferable to sense that the insertion into the member 2 is completed. Further, the pulling property of the male member 1 from the female member 2 is such that, when pulling out the male member 1 from the female member 2, if there is no pulling force more than a predetermined value.
Not suitable for practical use.

Therefore, in the quick connector of the eleventh embodiment shown in FIG. 22, the dimensions of the arm portion 31 and the hook portion 32 of the locking claw member 3 of the quick connector of the first embodiment, that is, in FIG. The length L ₁ of the arm 31 shown,
The thickness t ₁ of the arm portion 31, the length L ₂ of the claw portion 32, restricting the circumferential surface of the first socket part 22 25 and the claw portion 32 the axial length overlapped in the direction L _3, first socket part 22 The thickness t ₂ of the stopper surface 26 and the claw portion 32 that overlap in the radial direction, and the angle θ formed by the taper surface 32d of the claw portion 32 with respect to the axial center of the first socket portion 22, Adjustments were made as shown in Table 1 below. As a result, the insertability of the male member 1 into the female member 2 and the pullability of the male member 1 from the female member 2 were optimized. Further, in the quick connector of this example, the first socket portion 22 of the female member 2 is made of glass fiber-containing polyamide resin to reduce the weight. (Comparative Example) In order to evaluate the insertability of the male member 1 into the female member 2 and the withdrawal property of the male member 1 from the female member 2 in the quick connector of the example shown in FIG. Length L ₁ , thickness t ₁ , length L ₂ ,
The length L ₃ , the thickness t ₂ , and the angle θ are shown in Table 1 below.
Changed as shown in. The quick connector of the comparative example has the same configuration as the quick connector of the example shown in FIG. 22, except for the changes in the dimensions of the arm portion 31 and the claw portion 32 of the locking claw member 3. .. (Evaluation) In the quick connector of the example shown in FIG. 22 and the quick connector of the comparative example, the insertion load of the male member 1 into the female member 2 and the pulling load of the male member 1 from the female member 2 were actually measured, and comparative evaluation was performed. As a result, the results shown in Table 1 below were obtained.

In the quick connector of the example shown in FIG. 22, the taper surface 32d of the claw portion 32 has the first socket portion 22.
Since the angle θ formed with respect to the axis of
The taper surface 32d of 2 works effectively as a guide surface of the ring-shaped protrusion 11 of the male member 1, and an appropriate insertion load of the male member 1 into the female member 2, that is, an appropriate insertability can be obtained. It was Further, in the quick connector of the example shown in FIG. 22, since the length L ₂ of the claw portion 32 is proper, it is possible to obtain the pulling load of the male member 1 from the female member 2, that is, the proper pulling property. It was

On the other hand, in the quick connector of the comparative example, the taper surface 32d of the claw portion 32 makes an angle θ with respect to the axis of the first socket portion 22 larger than the proper angle, so that the locking claw member is formed. When the claw 32 of the third member gets over the ring-shaped protrusion 11 of the male member 1, the ring-shaped protrusion 11 of the male member 1
Received an excessive resistance force from the claw portion 32 of the locking claw member 3 and was inferior in insertability of the male member 1 into the female member 2. Further, in the quick connector of the comparative example, the length L _{2 of the} claw portion 32 is
Was shorter than the proper length, the female member 2 of the male member 1
The withdrawal load was small and the drawability was poor.

[0034]

[Table 1] FIG. 2 shows the quick connector of the twelfth embodiment of the present invention.
This will be described with reference to FIG. As shown in FIG. 23, in this example, the retract space 22 of the quick connector of the first embodiment is used.
Instead of the first socket portion 22 in which r is formed on the peripheral wall,
It has a first socket portion 22 in which an evacuation chamber 22s capable of accommodating the arm portion 31 and the claw portion 32 of the locking claw member 3 deformed in the centrifugal direction is formed. Further, in the first socket portion 22 of the quick connector of the example shown in FIG. 20, the concave engaged portion 22m has a conical surface portion 22x extending from one end of the receiving hole 23 toward the opening 24 while narrowing its width. , A rectangular portion 22y extending with a constant width in the direction,
The first socket portion 2 of the quick connector of the example shown in FIG.
In FIG. 2, the groove-shaped engaged portion 22m includes only the rectangular portion 22y extending from one end of the receiving hole 23 toward the opening 24 with a constant width.

Further, the first socket portion 22 of the quick connector of the example shown in FIG. 23 is a ring formed in the radial direction perpendicular to the restriction inner peripheral surface 25 and coaxially with the stopper surface 26. 22q. The inner diameter of the ring-shaped surface 22q is equal to the ring-shaped base portion 3 of the locking claw member 3.
The outer diameter of 0 is preferably 3 mm or more.

In the example shown in FIG. 23, the arm 3
1 is disposed at a position recessed radially inward from the peripheral edge of the ring-shaped base 30 by a predetermined distance. Therefore,
When the male member 1 is inserted into the female member 2 and when the male member 1 is pulled out from the female member 2, the claw portions 32 and the arm portions 31 of the locking claw member 3 which are deformed in the centrifugal direction are provided in the first socket portion 22. It is housed in a retreat chamber 22s formed by the peripheral wall, the ring-shaped surface 22q, and the ring-shaped base portion 30.

The first evacuation chamber 22s having such a structure is formed.
In the example of the quick connector having the socket portion 22 shown in FIG. 23, although the request for downsizing of the first socket portion 22 is slightly unsatisfactory, since the locking claw member 3 is not exposed to the outside, an impact from the outside is generated. Is not directly applied to the locking claw member 3. As a result, there is no risk of accidentally releasing the engagement between the male member 1 and the female member 2 due to an impact from the outside.

[0038]

According to the quick connector of the present invention, the displacement of the male member in the axial direction is regulated by hitting the stopper surface in the state where the claw portion of the locking claw member is locked to the ring-shaped projection of the insertion end. .. At this time, since the displacement of the claw portion in the centrifugal direction is regulated by the regulation inner peripheral surface, the claw portion is prevented from being detached from the ring-shaped protrusion. Therefore, the locking force by the claw portion becomes reliable, and the reliability of the pipe can be improved.

[Brief description of drawings]

FIG. 1 is a side view showing a cross section of an upper half of a state in which a male member and a female member according to a first embodiment are connected.

FIG. 2 is a plan view showing a state in which a male member and a female member according to the first embodiment are connected to each other.

FIG. 3 is a side view showing an upper half of a state in which a male member is inserted in a female member according to the first embodiment in a cross section.

FIG. 4 is a side view showing a cross section of the upper half of the state before the male member is inserted into the female member according to the first embodiment.

FIG. 5 is a side view showing a cross section of the upper half when the claw portion of the locking claw member according to the first embodiment is removed.

FIG. 6 is a side view of a locking claw member.

FIG. 7 is a front view of a locking claw member.

FIG. 8 is a side view showing a cross section of the upper half of the state in which the male member and the female member according to the second embodiment are connected.

FIG. 9 is a side view showing a cross section of the upper half of the state in which the male member and the female member according to the third embodiment are connected.

FIG. 10 is a side view showing a cross section of an upper half of a state in which a male member and a female member according to a fourth embodiment are connected to each other.

FIG. 11 is a side view showing an upper half of a state in which a male member is inserted in a female member according to a fifth embodiment in section.

FIG. 12 is a side view showing a cross section of the upper half of the state in which the male member and the female member according to the fifth embodiment are connected.

FIG. 13 is an enlarged side view of the essential part showing a cross section of the upper half of the state in which the male member and the female member according to the sixth embodiment are connected.

FIG. 14 is an enlarged sectional view of a main part of a female member according to a seventh embodiment.

FIG. 15 is an enlarged sectional view of a main part of a female member according to an eighth embodiment.

FIG. 16 is an enlarged sectional view of a main part of a female member according to a ninth embodiment.

FIG. 17 is a side view showing a cross section of the upper half of the state before inserting the male member into the female member according to the tenth embodiment.

FIG. 18 is a side view showing a cross section of the upper half of the locking claw member according to the tenth embodiment.

FIG. 19 is a front view of a locking claw member according to a tenth embodiment.

FIG. 20 is a side view showing a cross section of the upper half of the female member according to the tenth embodiment.

FIG. 21 is a front view of a female member according to the tenth embodiment.

FIG. 22 is a sectional view of a main part of a female member according to an eleventh embodiment.

FIG. 23 is a sectional view of a main part of a female member according to a twelfth embodiment.

FIG. 24 is a side view showing a cross section of an upper half of a state in which a male member and a female member according to a conventional example are connected.

FIG. 25 is a side view showing a cross section of the upper half of the main part in a state where a male member and a female member according to another conventional example are connected.

FIG. 26 is a side view showing a cross section of the upper half of the main part in a state in which a male member and a female member according to another conventional example are connected.

[Explanation of symbols]

In the figure, 1 is a male member, 10 is an insertion end portion, 11 is a ring-shaped protrusion, 2 is a female member, 20 is a second socket portion, 22 is a socket portion, 24 is an opening, 25 is a regulated inner peripheral surface, 26. Is a stopper surface, 3 is a locking claw member, and 32 is a claw portion.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuhiro Kato 3600 Amitsu, Kokutoyama, Komaki City, Aichi Prefecture Tokai Rubber Industry Co., Ltd.

Claims (1)

[Claims] 1. A cylindrical male member having an insertion end portion having a tip portion and a ring-shaped locking portion behind the tip portion, and an insertion end portion of the male member and the ring-shaped locking portion are inserted. And a receiving hole having an opening formed therein, a tube having a ring-shaped stopper surface, which is formed in this order from the opening toward the back and faces the opening, and a restriction inner peripheral surface extending in the axial direction. -Shaped female member, between the inner peripheral surface that is built in the receiving hole of the female member and forms the receiving hole of the female member, and the outer peripheral surface of the insertion end portion of the male member that is inserted into the receiving hole A ring-shaped base portion that is movably interposed along the axial direction, and a plurality of arm portions that extend from the base portion toward the opening substantially along the axial direction of the female member and are elastically deformable in the radial direction. , A locking claw member extending to each of the arm parts and having a claw part that is locked to the ring-shaped locking part of the male member. By moving toward the opening along the axial direction of the female member, the claw portion of the locking claw member is pressed against the stopper surface while restricting the movement in the centrifugal direction by the restriction inner peripheral surface. A quick connector, characterized in that the pawl portion of the pawl member is engaged with the ring-shaped engagement portion of the insertion end portion of the male member.