JPH051795A - Quick connector - Google Patents

Abstract

PURPOSE:To regulate axial direction dislocation in a ring seal unit by fixing a fixing unit having a regulating surface to regulate the ring seal unit while sandwiching between the first sandwiching surface of the first socket unit and the second sandwiching surface of the second socket unit. CONSTITUTION:A quick connector is provided with a cylindrical male member 1 having an insertion edge part 10, the first cylindrical socket unit 20 having an acceptance opening 24 and the first ring shape sandwiching surface 20b, and the second cylindrical socket unit 22 driven into the first socket unit 20 so as to be connectable/disconnectable freely. The connector is also provided with a bush 27 sandwiched between these first socket unit 20 and second socket unit 22, a locking claw member 3 having a flange part, an arm part, a ring shape groove part 11 of the male member 1, a locking claw part 32 and a disengagement preventive projection part 33, and a spring 4 to energize the claw part 32 in the direction that the claw part 32 can be locked on the ring shape groove part 11 as well as to energize the disengagement preventive projection part 33 in the direction that the disengagement preventive projection part 33 can be locked on step parts 23e of the first socket unit 20. Thereby, displacement of O rings 28a and 28b can be regulated by means of the ring shape regulating surface of the bush 27.

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 piping for connecting a hose or a pipe for transferring fluid such as gasoline, oil, water and air.

[0002]

2. Description of the Related Art As a piping connector, one shown in FIG. 10 is known (Japanese Utility Model Laid-Open No. 64-41794). This piping connector has a cylindrical female member 103.
A ring-shaped O-ring 105 provided on the inner peripheral surface of the female member 103, and an O-ring 10 inserted into the female member 103.
It is composed of a holding member 106 for holding 5 and a male member 104. Here, the holding member 106 is the male member 104.
And a plurality of leg portions 162 that extend from the rear end of the tubular portion 161 and are bent outward, and are made of a flexible material. There is. The holding member 106 has a concave groove 162a on the outer side and an annular groove 161a on the inner side.

At the time of use, the holding member 106 is inserted into the female member 103 with the O-ring 105 and the bush 107 fitted in the female member 103. As a result, the concave groove 162a is locked to the annular projecting portion 103a of the female member 103. After that, the male member 104 is inserted into the female member 103, and the annular groove 161a and the ring-shaped protrusion 1 of the male member 104 are inserted.
04a, thereby locking the male member 104 and the female member 103.
And are connected.

[0004]

In the above-mentioned conventional connector, the O-ring 105 and the bush 107 may be displaced in the axial direction depending on the usage after piping. In this case O
The sealing property of the ring 105 may decrease,
It is disadvantageous in terms of ensuring pressure resistance. For example, when a high hydraulic pressure F is applied from the hole 103f side of the female member 103, the hydraulic pressure is applied via a minute gap m between the inner peripheral surface 103g of the female member 103 and the outer peripheral surface 104g of the front end of the male member 104. The O-ring 105 acts on the O-ring 105 and is displaced in the axial direction,
The sealability and pressure resistance of the ring 105 may decrease.

Since the internal pressure applied to the O-ring 105 is also transmitted to the bush 107 and the holding member 106, the holding member 106 is affected by the internal pressure and bending stress acts on the holding member 106. Therefore, the concave groove 16 of the holding member 106
The locking force between the 2a and the annular overhanging groove portion 103a of the female member 103 is weakened, and the connecting force between the male member 104 and the female member 103 may be weakened.

Further, as described above, the O
Since the internal pressure acting on the ring 105 is also transmitted to the bush 107 and the holding member 106, depending on the material of the holding member 106, the wall surface of the concave groove 162a of the holding member 106 excessively presses the annular overhanging portion 103a of the female member 103. As a result, the wall surface of the groove 162a may be damaged. Therefore, in this connector, the locking force tends to be unstable.

The present invention has been made in view of such circumstances, and it is an object of the present invention to maintain good sealability and increase pressure resistance by restricting the axial displacement of the ring seal portion. To provide a quick connector. Further, the present invention prevents the displacement of the ring seal portion from being transmitted to the locking claw member by restricting the axial displacement of the ring seal portion, thereby avoiding the deformation of the locking claw member. However, it is an object of the present invention to provide a quick connector that can secure a locking force by the claw portion of the locking claw member and thus a degree of connection between the male member and the female member.

[0008]

According to a first aspect of the present invention, there is provided a quick connector having a cylindrical male member having an insertion end at its tip, a receiving opening into which the insertion end of the male member is inserted, and a first inner circumference. A cylindrical first socket portion having a surface and a ring-shaped first sandwiching surface formed on the side opposite to the receiving opening, and detachably connected to the first socket portion and facing the first sandwiching surface from the end side. A ring-shaped second clamping surface and a ring-shaped sheath that is coaxially adjacent to the second clamping surface and has an inner diameter larger than the outer diameter of the insertion end.
And a second inner peripheral surface that surrounds the inner peripheral surface and the tip of the insertion end.
A tubular second socket portion having a ring seal portion which is fitted substantially coaxially with the inner peripheral surface of the reel and seals between the outer peripheral surface of the insertion end portion and the inner peripheral surface of the seal; The first seal surface of the first socket portion and the second grip surface of the second socket portion are sandwiched between the central hole into which the insertion end portion is inserted and the ring seal portion.
And a female member having a fixing portion having a ring-shaped restricting surface for restricting the axial displacement of the male part, and extending in the centrifugal direction to face the receiving opening, and the insertion end of the male member is inserted. A flange portion having a central hole, an arm portion extending axially from the flange portion and inserted into the receiving opening, a claw portion provided at a tip of the arm portion and engaging with an outer peripheral wall of the male member, and a first socket Is disposed between the first socket portion of the female member and the flange portion of the locking claw member, and the locking claw member has an anti-slip protrusion that restricts axial disengagement of the locking claw member. And a biasing member that biases the claw portion in a direction to engage with the outer peripheral wall of the male member and biases the disengagement prevention protrusion in a direction to engage with the first inner peripheral surface of the first socket portion. It is characterized by being present.

According to a second aspect of the present invention, there is provided a quick connector in which a cylindrical male member having an insertion end portion at a front end portion, a receiving opening into which the insertion end portion of the male member is inserted, a first inner peripheral surface and the receiving opening. A cylindrical first socket portion having a ring-shaped first holding surface formed on the opposite side to the first socket portion, and a ring shape that is detachably connected to the first socket portion and faces the first holding surface from the end side. Second
A ring-shaped seal inner peripheral surface coaxially adjacent to the clamping surface and the second clamping surface and having an inner peripheral diameter larger than the outer peripheral diameter of the insertion end, and a second end surrounding the tip of the insertion end. A cylinder having an inner peripheral surface and a ring seal portion fitted substantially coaxially with the inner peripheral surface of the seal and sealing between the outer peripheral surface of the insertion end portion and the inner peripheral surface of the seal. -Shaped second socket portion, and a central hole into which the insertion end portion is inserted by being sandwiched by the first holding surface of the first socket portion and the second holding surface of the second socket portion, and the ring seal portion. A female member having a fixing portion facing each other and having a ring-shaped restricting surface for restricting a shift of the ring seal portion in the axial direction, and a female member extending in the centrifugal direction facing the receiving opening and facing the receiving opening. A flange portion having a central hole into which the insertion end portion is inserted, an arm portion extending axially from the flange portion and inserted into the receiving opening, and an arm portion of the arm portion. A claw portion provided at an end and engaging with the outer peripheral wall of the male member, and a first inner peripheral surface of the first socket portion that can be engaged with and disengage from the first socket portion in the axial direction. And a locking claw member having a retaining stopper protruding portion for restricting.

In the quick connector of the present invention, the female member comprises the first socket portion, the second socket portion and the fixing portion. The first socket portion has a tubular shape and has a receiving opening, a first inner peripheral surface, and a first sandwiching surface. The receiving opening is where the insertion end of the male member is inserted. The first sandwiching surface is formed on the side opposite to the receiving opening and has a ring shape. The second socket portion has a tubular shape and is detachably connected to the first socket portion. The connecting structure can be appropriately selected. The second socket portion has a second holding surface, a seal inner peripheral surface, and a second inner surface from the end side facing the first socket portion.
With inner surface. The second holding surface has a ring shape facing the first holding surface. The inner peripheral surface of the seal has a ring shape, is coaxially adjacent to the second holding surface, and has an inner peripheral diameter larger than the outer peripheral diameter of the insertion end portion. The second inner peripheral surface surrounds the tip of the insertion end. The ring seal portion is fitted on the inner peripheral surface of the seal substantially coaxially, and seals between the outer peripheral surface of the insertion end portion and the inner peripheral surface of the seal. The fixing portion is the first holding surface of the first socket portion and the second
It is clamped and fixed by the second clamping surface of the socket portion. When the first socket portion and the second socket portion are separated, the fixing portion can be removed. The fixed portion has a central hole into which the insertion end portion is inserted and a restriction surface facing the ring seal portion. The material of the fixing portion can be appropriately selected. The locking claw member has a flange part, an arm part, a claw part, and a disengagement preventing projection. The flange portion has a central hole that extends in the centrifugal direction, faces the receiving opening, and receives the insertion end portion of the male member. The arm portion extends axially from the flange portion and is inserted into the receiving opening. The claw portion is provided at the tip of the arm portion and engages with the outer peripheral wall of the male member. The disengagement preventing protrusion restricts the engaging claw member from axially disengaging from the first socket portion.

The biasing member biases the locking claw member in a direction in which the claw portion of the locking claw member locks on the outer peripheral wall of the male member. Further, the biasing member biases the locking claw member in a direction in which the disengagement preventing projection is locked to the first inner peripheral surface of the first socket portion. As the urging member, various springs such as a coil spring and a leaf spring can be adopted.

[0012]

The operation of the quick connector of the present invention will be described together with the method of using it. First, the first socket portion and the second socket portion are connected in a state where the ring seal portion is fitted to the inner peripheral surface of the seal of the second socket portion of the female member. As a result, the fixing portion is clamped and fixed by the first holding surface of the first socket portion and the second holding surface of the second socket portion. In this state, the ring seal portion faces the regulation surface of the fixed portion, so that the axial displacement of the ring seal portion is regulated by the regulation surface of the fixed portion.

Further, in order to connect the female member and the male member, the insertion end portion of the male member is inserted into the first socket portion through the receiving opening of the first socket portion of the female member. Then, the tip of the insertion end portion is surrounded by the second inner peripheral surface of the second socket portion of the female member. When the insertion is completed in this way, the urging force of the urging member acts on the flange portion of the locking claw member to engage the detachment preventing projection of the locking claw member or the first inner peripheral surface of the first socket portion. Stop. Further, the claw portion of the locking claw member is locked to the outer peripheral wall of the male member via the biasing force of the biasing member, whereby the male member and the female member are connected. In such a connected state, the ring seal portion faces the regulation surface of the fixed portion similarly to the above, so that the axial displacement of the ring seal portion is regulated by the regulation surface of the fixed portion.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the quick connector of the present invention will be described below with reference to FIGS. (Structure) FIGS. 1 to 4 are views showing the connecting process of the quick connector of this embodiment. The quick connector of this embodiment includes a male member 1, a female member 2, a locking claw member 3, and a spring 4 as a biasing member.

As shown in FIG. 1, the male member 1 has an insertion end portion 10 made of a metal pipe, a ring-shaped groove portion 11 as a locking portion formed on the outer peripheral surface of the insertion end portion 10, and a ring-shaped groove portion 11. -Shaped projection 13 formed on the base side away from the
With and. A guide portion 10a is formed at the tip of the insertion end portion 10 to facilitate insertion. The female member 2 is shown in FIGS. The female member 2 is the screw portion 2.
0e having a cylindrical first socket portion 20 and a screw portion 22.
The cylindrical second socket portion 22 having e and the bush 27 as a fixed portion are provided. Then, by screwing the screw portion 22e and the screw portion 20e, the first socket portion 2
0 and the second socket portion 22 are detachably connected. The first socket portion 20 is shown in FIG. A circular receiving opening 24 is formed at one end of the first socket portion 20. The first socket portion 20 has a ring-shaped first inner peripheral surface 2 that defines a receiving hole 23 a that communicates with the receiving opening 24.
Holds 3. The first inner peripheral surface 23 has an inner peripheral diameter D of the receiving opening 24.
A restricted inner peripheral surface 23c having an inner peripheral diameter D2 larger than 1;
An inner peripheral diameter D3 that is larger than the inner peripheral diameter D2 of the restricted inner peripheral surface 23c.
Open inner peripheral surface 23d having a taper-shaped expanding surface 23f
And a step 23e. A seat groove 20f is formed on the outer peripheral portion of the first socket portion 20. Further, a ring-shaped first holding surface 20b is formed on the side of the first socket portion 20 opposite to the receiving opening 24.

The second socket portion 22 is shown in FIG. The second socket portion 22 has ring-shaped second holding surfaces 22b, 22c, a seal inner peripheral surface 22f, and a second inner surface 22f from the end side thereof.
The inner peripheral surface 22g is formed coaxially. Second clamping surface 2
2b and 22c face the first holding surface 20b. See
The inner peripheral diameter of the inner peripheral surface 22f is set to be larger than the outer peripheral diameter of the insertion end portion 10. The second inner peripheral surface 22g is the insertion end portion 1
It surrounds the tip of 0. In the space defined by the inner peripheral surface 22f of the seal, a rubber O is used as a ring seal portion.
Rings 28a, 28b, resin ring-shaped color
29 is fitted coaxially. The second socket 2
2, a bamboo-shaped seal groove 22i is formed.

The bush 27 is made of resin, and comprises a ring portion 27a and a flange portion 27b extending radially outward, as shown in FIG. The ring portion 27a is the insertion end portion 10.
Has a central hole 27e into which is inserted. The other end surface of the bush 27 is a ring-shaped restriction surface 27d. Here, the outer peripheral diameter of the restriction surface 27d of the bush 27 is set to be larger than the inner peripheral diameter of the second inner peripheral surface 22f of the second socket portion 22. Further, the regulating surface 27d of the bush 27 has an O-ring 2
Since it faces 8a and 28b, the inner diameter of the restriction surface 27d is set smaller than the outer diameter of the O-rings 28a and 28b.

The locking claw member 3 is shown in FIGS. The locking claw member 3 is made of resin, and has a flange portion 30, an arm portion 31, a claw portion 32, and a disengagement preventing projection 33. The flange portion 30 extends in the centrifugal direction, and has a cylindrical portion 30c having a central hole 30b, a spring seat surface 30a, and a ring-shaped seat protrusion 30d. A plurality of arm portions 31 are axially extended from the tubular portion 30c of the flange portion 30. The claw portion 32 is located at the tip of the arm portion 31 and is provided in the radially inward direction. The disengagement prevention projection 33 is formed integrally with each of the claws 32, and projects from each of the claws 32 in a radially outward direction.

Here, the distance H1 between the outer surfaces of the arm portions 31 is set to be approximately the same as the inner diameter D1 of the receiving opening 24. Further, the distance H2 between the outer surfaces of the detachment preventing projections 33 is set to be about the same as the outer diameter D2 of the restricted inner circumferential surface 23c, or larger than D1 and smaller than D2. The distance H3 between the inner surfaces of the claw portions 32 is set to be smaller than the outer diameter D8 of the insertion end portion 10.

The spring 4 is a metal coil spring and is interposed between the seat portion 20f of the first socket portion 20 and the spring seat surface 30a of the flange portion 30 as shown in FIG. As shown in FIG. 1, in the state before connecting the male member 1 and the female member 2, the spring 4 biases the flange portion 30 of the locking claw member 3 along the axial direction of the first socket portion 20. The disengagement preventing projection 33 of the locking claw member 3 is locked to the step 23e.

(Operation) Now, the operation of the quick connector of this embodiment will be described together with its operation. First, the case where the female member 2 is assembled will be described. An O-ring 28 is formed on the seal inner peripheral surface 22f of the second socket portion 22 of the female member 2.
The screw portion 20 with the a, 28b, and color 29 fitted together
The first socket portion 20 and the second socket portion 22 are connected by screwing together e and 22e. At this time, as shown in FIG. 1, the bush 27 is clamped and fixed by the first clamping surface 20b of the first socket portion 20 and the second clamping surfaces 22b, 22c of the second socket portion 22. In this state, the O-rings 28a, 2
8b and color 29 are facing the restriction surface 27d of the bush 27.

Next, the case of connecting the female member 2 and the male member 1 will be described. As shown in FIG. 1, the male member 1 and the female member 2 are made to face each other. Then, the locking claw member 3 is retracted with a fingertip, a jig, or the like, or the insertion end portion 10 is forcibly pressed into the receiving opening 24, whereby the insertion end portion 10 is inserted.
Is inserted into the receiving hole 23a through the receiving opening 24 while resisting the spring 4. If the insertion end 10 is inserted too much, the insertion end 10
It is suppressed by the ring-shaped protrusion 13. Then, as the insertion end portion 10 is inserted backward, the arm portion 31 of the locking claw member 3 is further retracted in the backward direction, that is, the arrow X1 direction as shown in FIG. At this time, the claw portion 32 is pushed radially outward by the outer peripheral wall of the insertion end portion 10, and thus the claw portion 32 escapes to the open inner peripheral surface 23d side. Further, as shown in FIG. 3, the insertion work progresses so that the ring-shaped groove portion 11 of the insertion end portion 10 becomes the claw portion 3.
When reaching 2, the ring-shaped groove portion 11 and the claw portion 32 are locked,
The arm portion 31 and the claw portion 32 are restored in the radial inward direction. In this state, the spring force of the spring 4 acts along the axial direction of the insertion end portion 10, so that the flange portion 30 of the locking claw member 3 is pressed along the axial direction. Therefore, as shown in FIG. 4, the disengagement preventing projection 33 of the locking claw member 3 is formed on the step portion 2 of the first socket portion 20.
The protrusion 33 is pressed against 3e and its movement in the axial direction is restricted. Further, the disengagement prevention projection 33 is formed on the regulated inner peripheral surface 23.
The movement in the direction perpendicular to the axis is restricted by c.

As described above, since the disengagement preventing projection 33 is restricted in the direction perpendicular to the axis and in the axial direction, the disengagement preventing projection 3
3 and thus the locking claw member 3 does not separate from the first socket portion 20, and the ring-shaped groove 11 of the male member 1 and the locking claw member 3 are not separated.
The engagement with the claw portion 32 is also ensured. When the connection between the male member 1 and the female member 2 is released, the flange portion 30 of the locking claw member 3 is pushed into the first socket portion 20 side. Then, the claw portion 32 of the locking claw member 3 is pushed outward in the radial direction while retracting in the direction of the arrow X1 and is disengaged from the ring-shaped groove portion 11 of the male member 1. When the insertion end 10 of the male member 1 and the female member 2 are axially separated 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 this embodiment, the insertion end 10 of the male member 1 is simply inserted into the female member 2,
The claw portion 32 of the locking claw member 3 is connected to the ring-shaped groove portion 11 of the male member 1.
The male member 1 and the female member 2 can be connected easily and in a short time.

Further, in this embodiment, the bush 27 is sandwiched and fixed by the first sandwiching surface 20b of the first socket portion 20 and the second sandwiching surfaces 22b, 22c of the second socket portion 22. Therefore, the O-rings 28a and 28b face the restriction surface 27d of the bush 27, and the axial displacement of the O-rings 28a and 28b is restricted. Therefore, it is advantageous in terms of securing sealability and pressure resistance.

Further, in the present embodiment in which the axial displacement of the O-rings 28a, 28b is restricted, as can be understood from FIG. 4 showing the usage state, the second socket portion 22 has the second
From the minute gap m between the inner peripheral surface 22g and the outer peripheral surface of the insertion end portion 10 of the male member 1, the oil pressure is O-rings 28a, 28b, and the collar-2.
Even when it acts on 9, the hydraulic pressure can be prevented from being transmitted to the spring 4 and the locking claw member 3. Therefore, the deformation of the locking claw member 3 due to the hydraulic pressure transmission via the minute gap m is avoided, and the locking degree between the claw portion 32 and the ring-shaped groove portion 11 is stabilized.

Furthermore, in this embodiment, the O-ring 28a,
Even if 28b deteriorates, the screw parts 20e, 22
By removing e, the first socket portion 20 and the second socket portion 22 can be separated, so that the O-rings 28a and 28b can be exchanged. Further, in this embodiment, when the insertion end portion 10 is not sufficiently inserted, the claw portion 32 of the locking claw member 3 rides on the outer peripheral surface of the insertion end portion 10 as shown in FIG. Is bending radially outward. In this state, the disengagement preventing projection 33 interferes with the expanding surface 23f, so that the locking claw member 3 cannot advance in the arrow X2 direction. Therefore, the distance K between the flange portion 30 and the end surface of the receiving opening 24 (see FIG.
Is shorter than the regular interval, and the user can visually recognize that the interval K is insufficient and the claw portion 32 and the ring-shaped groove portion 11 are incompletely locked by identifying this interval K.

(Other Embodiment) Next, a second embodiment of the quick connector of the present invention will be described with reference to FIG. The quick connector of the second embodiment has basically the same configuration as that of the first embodiment, and the same parts are designated by the same reference numerals. However, the spring 4 as a biasing member is not provided. In this embodiment, the male member 1 is inserted into the receiving opening 24 of the female member 2, and the ring-shaped groove portion 11 and the claw portion 32 are locked. In that state,
The male member 1 is relatively pulled in the axial direction thereof, and the locking claw member 3
Retreat. Then, the stopper protrusion 33 is press-fitted into the hole defined by the restricted inner peripheral surface 23c. Therefore, the claw portion 32
The movement in the axis-perpendicular direction and the axial direction is restricted by the restriction inner peripheral surface 23c, and the male member 1 and the female member 2 are connected.

Next, a third embodiment of the quick connector of the present invention will be described with reference to FIGS. The quick connector of the third embodiment has basically the same configuration as that of the second embodiment, and the same parts are designated by the same reference numerals. Also in this example, unlike the first embodiment, the spring 4 as the biasing member is used.
Is not provided. In this embodiment, the male member 1 is pulled in the axial direction, and the movement of the claw portion 32 in the direction perpendicular to the axis is surely restricted by the restriction inner peripheral surface 23c, and then the holding member 8 made of nylon resin is fixed to the flange of the locking claw member 3. It is press-fitted into the space between the portion 30 and the female member 2 along the direction of the arrow J, thereby preventing axial displacement of the locking claw member 3, and thus the female member 2 and the male member 1
And are connected.

Here, the holding member 8 comprises an insertion portion 80 having a guide portion 80a, and an operation projection portion 82 operated by a fingertip or the like. Also in the above-described second and third embodiments, the bush 27 is replaced by the first socket portion 2 as in the first embodiment.
It is clamped and fixed by the first clamping surface 20b of 0 and the second clamping surfaces 22b and 22c of the second socket portion 22. Therefore, the O-rings 28a and 28b are attached to the restriction surface 27 of the bush 27.
Since the O-rings 28a and 28b are opposed to each other in the axial direction, the shifts in the axial direction are restricted, which is advantageous in terms of securing sealability and pressure resistance.

Next, a fourth embodiment of the quick connector of the present invention will be described with reference to FIGS. The quick connector of the fourth embodiment has basically the same configuration as that of the first embodiment, and the same parts are designated by the same reference numerals. However, the locking claw member 3 is made of steel such as spring steel or metal such as brass, and the tip of the claw portion 32 is sharp. Further, the male member 1 is a metal pipe, and unlike the first embodiment, the ring-shaped groove portion 11 is not formed. Also in this example,
As shown in FIG. 14, the male member 1 and the female member 2 are made to face each other,
The engaging claw member 3 is retracted with a fingertip or a jig, or the insertion end 10 is forcibly pressed into the receiving opening 24, whereby the insertion end 10 is received from the receiving opening 24.
3a is inserted while resisting the spring 4. Then, the insertion end 1
As 0 is inserted backward, the arm portion 31 of the locking claw member 3 is further retracted in the backward direction, that is, the arrow X1 direction, as shown in FIG. At this time, the claw portion 32 is pushed radially outward by the outer peripheral wall of the insertion end portion 10, and thus the claw portion 32 escapes to the open inner peripheral surface 23d side. When the fingers are separated from the male member 1, the spring 4 presses the flange portion 30 of the locking claw member 3 along the axial direction by the spring force or the liquid pressure at the time of use. A taper-shaped expanding surface 23
This is strongly pressed by f, whereby the pawl portion 32 is urged in the radial direction as shown in FIGS. 16 and 17, and as a result, it bites into the outer peripheral wall of the insertion end 10 of the male member 1. In this state, as in the case of the first embodiment, as shown in FIG.
The retaining protrusion 33 is a step 23e of the first socket 20.
As a result, the disengagement preventing projection 33 is restricted from moving in the axial direction, and the disengagement preventing projection 33 is restricted from moving in the axis-perpendicular direction by the restricting inner peripheral surface 23c. Also in the fourth embodiment, since the disengagement preventing projection 33 is restricted in the axis-perpendicular direction and the axial direction, the claw portion 32 is surely bited into the outer peripheral wall of the male member 1. Furthermore, the fourth
Also in the embodiment, as in the first embodiment, the bush 27
Is clamped and fixed by the first socket portion 20 and the second socket portion 22, and the restricting surface 27d of the bush 27 restricts the axial displacement of the O-rings 28a and 28b.
Therefore, it is advantageous in terms of sealing and pressure resistance, and further,
Even when the hydraulic pressure acts on the O-rings 28a, 28b and the color 29 from the minute gap m between the second inner peripheral surface 22g of the second socket portion 22 and the outer peripheral surface of the insertion end portion 10 of the male member 1, It is possible to prevent the hydraulic pressure from being transmitted to the spring 4 and the locking claw member 3.

The male member 1 may be resin or a metal material coated with resin. Next, a fifth experimental example of the quick connector of the present invention will be described with reference to FIGS. The quick connector of the fifth experimental example has basically the same configuration as that of the first experimental example, and the same portions are denoted by the same reference numerals. However, a ring-shaped protrusion 19 as a locking portion is formed on the front side of the ring-shaped protrusion 13 of the male member 1. Then, as shown in FIG. 19, when the male member 1 is inserted, the ring-shaped protrusion 19 pushes up the claw portion 32 of the locking claw member 3 to expand the diameter. When the ring-shaped protruding portion 19 enters deeper than the claw portion 32, the arm portion 3 as shown in FIG.
1 is elastically restored, and the claw portion 32 and the ring-shaped protrusion 19 are locked. At this time, as shown in FIG. 18, the ring-shaped protrusion 13 is located inside the locking claw member 3.

[0033]

According to the quick connector of the present invention, the fixing portion having the regulating surface for regulating the ring seal portion is clamped by the first clamping surface of the first socket portion and the second clamping surface of the second socket portion. Has been fixed. Therefore, the axial displacement of the ring seal portion is restricted. Therefore, when the connector is used, the axial displacement of the ring seal portion is suppressed, the sealability of the ring seal portion is maintained well, and the pressure resistance is improved.

According to the quick connector of the present invention,
Even if internal pressure such as hydraulic pressure acts on the ring seal portion due to a minute gap between the second inner peripheral surface of the second socket portion and the outer peripheral surface of the insertion end portion of the male member, the axial direction of the ring seal portion The displacement at is regulated by the regulation surface of the fixed portion. Therefore, it is possible to prevent the internal pressure applied to the ring seal portion from being transmitted to the locking claw member. Therefore, the deformation of the locking claw member due to the transmission of the internal pressure can be avoided. Therefore, it is possible to prevent the degree of engagement between the pawl portion of the pawl member and the pawl portion of the male member from decreasing.

[Brief description of drawings]

FIG. 1 is a side view showing a first embodiment of the present invention and showing an upper half of a state before inserting a male member into a female member in section.

FIG. 2 is a side view showing the first embodiment of the present invention and showing an upper half of a state in which a male member is inserted into a female member and an arm portion is bent, in a cross section.

FIG. 3 is a side view showing the first embodiment of the present invention and showing the upper half of the male member inserted in the female member in section.

FIG. 4 is a side view showing the first embodiment of the present invention and showing the upper half of the state in which the male member and the female member are connected, in section.

FIG. 5 is a side view showing a cross section of the upper half of the second socket portion of the female member.

FIG. 6 is a side view showing a cross section of an upper half of the first socket portion of the female member.

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

FIG. 8 is a front view of a locking claw member.

FIG. 9 is a side view showing a cross section of the upper half of the first socket portion.

FIG. 10 is a cross-sectional view of the upper half of a conventional connector.

FIG. 11 is a side view showing the second embodiment of the present invention and showing the upper half of the state in which the male member and the female member are connected, in section.

FIG. 12 is a side view showing the third embodiment of the present invention and showing the upper half of the state in which the male member and the female member are connected, as a cross section.

FIG. 13 is a front view of a holding member.

FIG. 14 is a side view showing the fourth embodiment of the present invention and showing the upper half of the state before inserting the male member into the female member in section.

FIG. 15 is a side view showing the fourth embodiment of the present invention and showing the upper half of the state in which the male member is inserted into the female member and the arms are bent, in cross section.

FIG. 16 is a side view showing the fourth embodiment of the present invention and showing the upper half of the state in which the male member and the female member are connected to each other in section.

17 is a cross-sectional view of the main part of FIG.

FIG. 18 is a side view showing a fifth embodiment of the present invention and showing an upper half of a state in which a male member and a female member are connected to each other in section.

FIG. 19 is a side view showing the fifth embodiment of the present invention and showing the upper half of the state in which the arm portion of the locking claw member is bent in section.

[Explanation of symbols]

In the figure, 1 is a male member, 10 is an insertion end portion, 11 is a ring-shaped groove portion, 2 is a female member, 20 is a first socket portion, 22 is a second socket portion, 24 is a receiving opening, and 23 is a first inner circumference. Surface, 23c
Is a regulated inner peripheral surface, 27 is a bush (fixed portion), 28a, 2
8b is an O-ring part (ring seal part), 3 is a locking claw member, 32 is a claw part, and 4 is a spring (biasing member).

Claims (2)

[Claims] 1. A cylindrical male member having an insertion end at its tip,
A tubular first socket portion having a receiving opening into which the insertion end portion of the male member is inserted, a first inner peripheral surface, and a ring-shaped first clamping surface formed on the side opposite to the receiving opening; A ring-shaped second holding surface that is detachably connected to the first socket portion and faces the first holding surface from the end side, is coaxially adjacent to the second holding surface, and is larger than the outer diameter of the insertion end portion. A ring-shaped seal inner peripheral surface having an inner peripheral diameter, a second inner peripheral surface surrounding the tip of the insertion end portion, and a second inner peripheral surface of the seal inner peripheral surface are substantially coaxially fitted to the insertion end portion of the insertion end portion. A cylindrical second socket portion having an outer peripheral surface and a ring seal portion for sealing between the seal inner peripheral surface, a first holding surface of the first socket portion, and the second socket portion. The second sealing surface of the ring and the center hole into which the insertion end is inserted, and the ring seal.
And a female member having a fixing portion having a ring-shaped restricting surface that restricts the axial displacement of the ring seal portion, and a female member that extends in the centrifugal direction and faces the receiving opening. A flange portion having a central hole into which the insertion end portion of the male member is inserted, an arm portion extending in the axial direction from the flange portion and inserted into the receiving opening, and the male member provided at the tip of the arm portion. A locking claw member having a claw part that locks with the outer peripheral wall of the member, and a disengagement preventing protrusion that restricts axial disengagement from the first socket part; a first socket part of the female member; The claw portion of the locking claw member is arranged between the claw portion and the flange portion of the locking claw member to bias the claw portion of the locking claw member in a direction of locking the outer peripheral wall of the male member, and the detachment preventing protrusion of the first socket And a biasing member that biases the first inner peripheral surface in a direction to lock the quick core. Kuta. 2. A cylindrical male member having an insertion end portion at its tip end,
A tubular first socket portion having a receiving opening into which the insertion end portion of the male member is inserted, a first inner peripheral surface, and a ring-shaped first clamping surface formed on the side opposite to the receiving opening; A ring-shaped second holding surface that is detachably connected to the first socket portion and faces the first holding surface from the end side, is coaxially adjacent to the second holding surface, and is larger than the outer diameter of the insertion end portion. A ring-shaped seal inner peripheral surface having an inner peripheral diameter, a second inner peripheral surface surrounding the tip of the insertion end portion, and a second inner peripheral surface of the seal inner peripheral surface are substantially coaxially fitted to the insertion end portion of the insertion end portion. A cylindrical second socket portion having an outer peripheral surface and a ring seal portion for sealing between the seal inner peripheral surface, a first holding surface of the first socket portion, and the second socket portion. The second sealing surface of the ring and the center hole into which the insertion end is inserted, and the ring seal.
And a female member having a fixing portion having a ring-shaped restricting surface that restricts the axial displacement of the ring seal portion, and a female member that extends in the centrifugal direction and faces the receiving opening. A flange having a central hole into which the insertion end of the male member is inserted, an arm extending axially from the flange and inserted into the receiving opening, and the male member provided at the tip of the arm. A claw portion that engages with the outer peripheral wall of the first socket portion,
And a locking claw member that is lockable to the inner peripheral surface and has a disengagement preventing projection that restricts axial disengagement from the first socket by locking. connector.