JPH0534389U - connector - Google Patents

Abstract

(57) [Abstract] [Purpose] The locking portion 11 that locks with the claw portion 32 has a concave shape or a convex shape while exerting a function of detecting that the connection between the male member 1 and the female member 2 is normal. Providing a quick connector for plumbing. [Structure] A cylindrical male member 1 having a locking portion 11, an insertion end portion 10 and a push-out protruding portion 13 located a predetermined distance behind the locking portion, and a locking claw member 3 having a claw portion 32. Female member 2 having and
And a detection member 3 disposed on the flange portion 30 of the locking claw member 3 so as to be displaceable radially outward, that is, in the Y1 direction. When the insertion end 10 of the male member 1 is inserted into the receiving hole 23 a from the receiving opening 24 of the female member 2, the locking portion 11 of the male member 1 is locked by the claw portion 32 of the locking claw member 3. When the connection between the male member 1 and the female member 2 is normal, the push-out protrusion 13 pushes the detection member 6 in the Y1 direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a connector for piping for connecting a hose, a pipe or the like for transferring fluid such as gasoline, oil, water and air.

[0002]

[Prior Art]

 Conventionally, as a connector for piping, as shown in FIGS. 17 and 18, a convex locking portion 101 extending in a ring shape and an insertion end portion 102 extending ahead of the locking portion 101 are provided. And a cylindrical male member 100 having, a female member 200 having a receiving hole 202 having a receiving opening 201, a locking claw member 205 having a claw portion 204, and a radially outward direction on the window 2007 of the female member 200. It is known that it is composed of a substantially C-shaped detection body 300 which is displaceably disposed in the above (Japanese Utility Model Publication No. 3-17115). The locking portion 101 projects radially outward from the outer peripheral surface of the male member 100 by an amount L.

In this connector, when used, the insertion end 102 of the male member 100 is inserted into the receiving hole 202 of the female member 200 from the receiving opening 201, whereby the locking portion 101 of the male member 100 is engaged. When the locking claw member 205 enters the stopper claw portion 204 further inward and reaches the stopper part 208, the locking portion 101 is locked by the claw portion 204 of the locking claw member 205, whereby the male member 100 and the female member. 200 and 200 are combined. In the state of being coupled in this way, as shown in FIG. 17 and FIG. 18, the pressed surface 301 of the detection body 300 is pressed by the convex locking portion 101 with the protrusion amount L, and the detection body 300 is radiused. It is pushed outward in the direction, that is, in the direction of the arrow Y1 to be displaced, and the detector 300 separates from the window 207 with the displacement. It is visually recognized that the female member 200 and the male member 100 are completely coupled by the detachment of the detection body 300, and thus the problem caused by the insufficient coupling of the male member 100 and the female member 200 is avoided.

[0004]

[Problems to be solved by the device]

 By the way, in the above-described connector, as described above, the detection body 300 is disengaged radially outward by the locking portion 101 that is locked by the claw portion 204 of the locking claw member 205. The protrusion amount L, the shape, and the like of the locking portion 101 are naturally limited in order to secure the favorableness of locking with the claw portion 204. Due to this relationship, the displacement amount of the detection body 300 is also limited by the protrusion amount L of the locking portion 101, and the displacement amount of the detection body 300 cannot be larger than L. Further, particularly in the above-mentioned connector, the locking portion 100 must always be a convex shape that protrudes in the radial direction in order to push the detection body 300 outward in the radial direction. If the locking portion 100 is not a convex shape but a concave shape that is recessed in the radial inward direction, the detection body 300 cannot be pushed outward in the radial direction, and the female body 200 and the male member 100 by the detection body 300 cannot be pushed. It becomes impossible to detect the binding with. Therefore, with this connector, the locking portion cannot be concave.

The present invention has been made in view of the above situation, and an object thereof is to push up the detection body by a protrusion different from the locking portion of the male member that is locked by the claw portion of the locking claw member. By adopting this method, the structure of the locking part can be made concave or convex, and the object is to provide a connector in which the displacement of the detector is not affected by the shape or structure of the locking part.

[0006]

[Means for Solving the Problems]

 The connector of the present invention has a ring-shaped concave or convex locking portion, an insertion end extending ahead of the locking portion, and a predetermined distance rearward of the locking portion and projecting radially outward. A cylindrical male member having a protruding protrusion, a female member having a receiving hole having a receiving opening into which the insertion end of the male member is inserted, and a male member and a female member are connected and held. And a male member and a female member are inserted into the receiving hole from the receiving opening, and the male member is inserted into the receiving opening. It is characterized in that when it is connected, it is composed of a detection body that is pushed outward in the radial direction by the pushing projection of the male member and displaced.

[0007]

[Action]

 The operation of the quick connector of the present invention will be described together with its usage. First, the insertion end of the male member is inserted into the receiving hole through the receiving opening of the female member. Then, the holding member connects the male member and the female member. Upon connection, the push-out projection of the male member pushes the detector outward in the radial direction and displaces it. The coupling between the female member and the male member is visually recognized based on the displacement amount of the detection body.

[0008]

【Example】

 Hereinafter, a first embodiment of the connector of the present invention will be described with reference to FIGS. 1 and 2 show a state in which a male member and a female member are coupled, FIGS. 3 to 5 show respective constituent elements, and FIGS. 6 to 9 show a state in the course of coupling. (Structure of Embodiment) In this embodiment, the male member 1 is made of a metal pipe as shown in FIGS. 1 and 3, and has an insertion end 10 and a ring shape formed on the outer peripheral surface of the insertion end 10. It has a concave locking portion 11 and a ring-shaped push-out projection 13 formed behind the ring-shaped locking portion 11. The outer peripheral surface of the extrusion protrusion 13 is an arc surface 13a. 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 FIG. The female member 2 is provided with a cylindrical metal- or resin-made first socket portion 20 having a screw portion 20e and a cylindrical metal- or resin-made second socket portion 22 having a screw portion 22e. ing. Then, by screwing the screw portion 22e and the screw portion 20e, the first socket portion 20 and the second socket portion 22 are connected to each other with the resinous bush 27 which is detachable and ring-shaped sandwiched therebetween. Has been done. 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 23 that defines a receiving hole 23 a that communicates with the receiving opening 24. As shown in FIG. 4, the first inner peripheral surface 23 has a restricting surface 23c having an inner peripheral diameter larger than the inner peripheral diameter of the receiving opening 24, and an inner peripheral diameter larger than the inner peripheral diameter of the restricting surface 23c. 23d having an open inner peripheral surface, a taper-shaped expanding surface 23f, and a restricting surface 23e extending along the axis perpendicular direction.

A ring-shaped seal inner peripheral surface 22f and a second inner peripheral surface 22g are coaxially formed on the second socket portion 22. Rubber O-rings 28a and 28b as a ring seal portion and a ring-shaped resin-made color 29 as a ring seal portion are fitted substantially coaxially in the space defined by the inner peripheral surface 22f of the seal. There is. The second socket portion 22 is provided with a bamboo-shaped seal groove 22i.

The locking claw member 3 as a holding means will be described with reference to FIGS. 10 and 11. The locking claw member 3 is made of resin, and has a tubular portion 30a having a central hole 30h, a flange portion 30, an arm portion 31, a claw portion 32, and a disengagement preventing projection 33. The flange portion 30 is extended in a ring shape in the centrifugal direction. A notch 37 having an arcuate bottom surface 37c is formed in the flange portion 30. A plurality of arm portions 31 extend axially from the tubular portion 30a. The claw portion 32 is located at the tip of the arm portion 31 and is provided in the radially inward direction. The disengagement stop projection 33 is formed integrally with each claw portion 32, projects radially outward from each claw portion 32, and has a vertical surface 33c.

As shown in FIGS. 10 and 11, the detection body 6 has an engagement projection 60, a pressed surface 61, and a contact surface 62, and the engagement projection 60 of the detection body 6 is engaged. The detector 6 is pressed into the groove 37a of the notch 37 of the flange portion 30 of the stop claw member 3 in the direction of the arrow Y2, and the detector 6 is displaced in the flange portion 30 of the locking claw member 3 in the radial direction, that is, in the directions Y1 and Y2. Equipped as possible. The area occupied by the detector 6 is considerably smaller than the area occupied by the flange 30. As shown in FIG. 10, the side surface of the pressed surface 61 is inclined, and as shown in FIG. 11, the front surface of the pressed surface 61 is arcuate.

Now, as shown in FIG. 1, the spring 4 is a metal coil spring, and is interposed between the first socket portion 20 and the flange portion 30 of the locking claw member 3. As can be understood from FIG. 4, in the state before the male member 1 and the female member 2 are coupled, the spring 4 biases the flange portion 30 of the locking claw member 3 along the axial direction to lock the flange portion 30. The disengagement prevention projection 33 of the claw member 3 is locked to the restriction surface 23e.

(Operation of Embodiment) 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. The second socket portion 22 of the female member 2 is fitted with the O-rings 28a, 28b and the collar 29 on the seal inner peripheral surface 22f so that the screw portions 20e, 22e are fitted to the first socket portion 20. The second socket portion 22 is connected. At this time, as shown in FIG. 4, the contact surface 62 of the detector 6 is in contact with or close to the bottom surface 37c of the notch 37.

Next, the case where the female member 2 and the male member 1 are joined together will be described. In this case, the locking claw member 3 is retracted in the direction of the arrow X1 with a fingertip, a jig, or the like, or the insertion end 10 is forcibly pressed into the receiving opening 24. As a result, the insertion end 10 is inserted from the receiving opening 24 into the receiving hole 23a while resisting the spring 4. Then, as the insertion end portion 10 is inserted backward, the claw portion 32 is pushed radially outward by the outer peripheral surface of the insertion end portion 10 as shown in FIG. 6, and the claw portion 32 is opened to the inner peripheral surface 23d. Run to the side. Further, as the insertion work progresses as shown in FIG. 8 and the ring-shaped locking portion 11 of the insertion end 10 reaches the claw portion 32, the ring-shaped locking 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 in the arrow X2 direction, and as shown in FIG. The disengagement stop projection 33 of the locking claw member 3 is pressed against the restriction surface 23e of the first socket portion 20, and the disengagement stop projection 33 is restricted in axial movement. Further, the disengagement prevention projection 33 is surrounded by the restriction surface 23c, and the movement in the direction perpendicular to the axis is restricted.

As described above, since the disengagement preventing projection 33 is restricted in the axis-perpendicular direction and the axial direction, the disengagement preventing projection 33 and thus the locking claw member 3 do not separate from the first socket portion 20, and the male member The ring-shaped locking portion 11 of No. 1 and the claw portion 32 of the locking claw member 3 are also reliably locked. In the state where the male member 1 and the female member 2 are coupled in this way, as shown in FIG. 1, the push-out protrusion 13 of the male member 1 contacts the pressed surface 61 of the detection body 6 and the detection body 6 is radially outside. In other words, it is pushed and displaced in the direction of arrow Y1. As a result, it can be visually recognized that the connection between the male member 1 and the female member 2 is normal. If the coupling between the male member 1 and the female member 2 is insufficient, the amount of displacement of the detection body 6 in the direction of the arrow Y1 is small, so that it can be visually recognized immediately. Since the engagement projection 60 of the detection body 6 is press-fitted into the groove 37c of the notch 37 of the flange portion 30, the detection body 6 is prevented from coming off due to the frictional resistance due to the press-fitting.

When releasing the connection between the male member 1 and the female member 2, in the state of FIG. 1, the flange portion 30 of the locking claw member 3 is pushed toward the first socket portion 20 side, that is, in the direction of arrow X1. The claw portion 32 of the locking claw member 3 is retracted in the direction of the arrow X1 and pushed outward in the radial direction to remove the claw portion 32 from the ring-shaped locking portion 11 of the male member 1. When the insertion end 10 of the male member 1 and the female member 2 are relatively separated in the axial direction in such a separated state, the male member 1 and the female member 2 are easily separated in a short time.

(Effects of the Embodiment) As described above, in this embodiment, the push-out protrusion 13 different from the locking portion 11 that locks the claw portion 32 of the locking claw member 3 causes the detection body 6 to move. The pressed surface 61 is configured to be pushed outward in the radial direction. Therefore, if the displacement amount of the detection body 6 in the radial outward direction is to be made large in order to facilitate visual recognition of the connection between the male member 1 and the female member 2, the protrusion amount L1 of the extrusion protrusion 13 should be increased. Good. The change in the protrusion amount L1 can be performed regardless of the degree of engagement between the claw portion 32 and the engagement portion 11.

Further, as shown in FIG. 1, since the side surface form of the pressed surface 61 of the detection body 6 is inclined, if the extrusion protrusion 13 advances in the direction of the arrow X1, the so-called “wedge principle” is used for detection. The operation of pushing up the pressed surface 61 of the body 6 is smoothly performed. In addition, as shown in FIG. 2, the pressed surface 61 of the detection body 6 has an arc shape, and the push-out projection 13 also has a ring shape. Therefore, even if the pressed surface 61 and the push-out projection 13 contact each other, Since the contact area is small, the frictional resistance between the pressed surface 61 and the push-out projection 13 when pushing up the detection body 6 is also small, which is advantageous for smoothly pushing up the detection body 6.

By the way, in the prior art shown in FIG. 17 and FIG. 18, the area of the detection body 300 is large, so that it easily interferes with, comes into contact with other members and other mechanisms, and is easily detached. In this case, the original purpose cannot be achieved if the male member and the female member are disengaged before the connection. In this respect, in this embodiment, the push-out projection 13 different from the locking portion 11 pushes up the detection body 6, and the detection body 6 is compared with the area occupied by the flange portion 30 of the locking claw member 3. Has a small occupation area, and it is easy to avoid interference and contact between the detection body 6 and other members and other mechanisms, which is advantageous in avoiding the above-mentioned problems.

Further, in the present embodiment, the bush 27 is sandwiched and fixed by the first socket portion 20 and the second socket portion 22. Therefore, as can be understood from FIG. 1 showing the usage state, the internal pressure is applied 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 to the O-rings 28a, 28b, Even when it acts on the collar 29, the bush 27 acts as a stopper for these components, and in this sense, the degree of engagement between the claw portion 32 and the ring-shaped engagement portion 11 is stable. Even when the O-rings 28a and 28b are deteriorated, the screw portions 20e and 22e can be removed to separate the first socket portion 20 and the second socket portion 22. Therefore, the O-rings 28a and 28b must be replaced. You can also

Second Embodiment Next, a second embodiment of the quick connector of the present invention will be described with reference to FIG. The quick connector of this example has basically the same configuration as that of the above embodiment. However, the ring-shaped locking portion 11 that locks with the claw portion 32 of the locking claw member 3 is a convex shape that projects in the radially outward direction. Also in this example, the push-out projection 13 is formed behind the locking portion 11, and the push-out surface 61 of the detection body 6 is moved outward in the radial direction by the push-out projection 13 different from the locking portion 11. It is a push-out structure.

(Third Embodiment) Next, a third embodiment of the quick connector of the present invention will be described with reference to FIGS. 13 to 16. The quick connector of this embodiment has basically the same configuration as that of the above embodiment. In this example, the locking claw member 7 as the holding means is arranged in the receiving hole 23a of the female member 2 so as to be movable in the directions of arrows X1 and X2. The locking claw member 7 is made of resin, and is formed on a tubular portion 70 having a central hole 70h, a plurality of arm portions 71 extending along the axial direction from the tubular portion 70, and a tip of the arm portion 71. And a claw portion 72 having an inclined surface 72a. The detection body 8 has an inclined pressed surface 81 and a collar portion 82. The detection body 8 is press-fitted into a through hole 90 formed in the peripheral wall of the first socket portion 20 of the female member 2. Further, a window 91 is formed in the first socket portion 20 of the female member 2 so as to penetrate in the thickness direction, and a ring-shaped first restricting surface extending along the axis perpendicular direction is provided between the window 91 and the through hole 90. 92, a ring-shaped second restricting surface 93 is formed continuously with the first restricting surface 92 and extends in the axial direction.

FIG. 15 shows a state before the male member 1 is inserted into the female member 2. As shown in FIG. 15, the flange portion 82 of the detection body 8 is in contact with or close to the outer peripheral surface of the first socket portion 20 of the female member 2. Then, as in the above-described embodiment, the insertion end portion 10 of the male member 1 is forcibly pressed into the receiving opening 24 of the female member 2. Then, the convex locking portion 11 presses the inclined surface 72a of the claw portion 72, and the claw portion 72 is pressed and bent radially outward together with the arm portion 71, and the claw portion 72 escapes to the window 91 side, and the locking portion 11 gets over the claw 72. In this state, as can be understood from FIG. 13, the push-out projection 13 of the male member 1 hits the pressed surface 81 of the detection body 8, and the detection body 8 moves radially outward, that is, in the direction of the arrow Y1 as shown in FIG. Have been pushed out. Therefore, it is visually recognized that the locking portion 11 has passed over the claw portion 72, which is a precondition for the normal connection between the male member 1 and the female member 2.

When the internal pressure during use in the state shown in FIG. 13 acts on the locking claw member 7 through the minute gap m between the insertion end 10 and the second inner peripheral surface 22 g of the female member 2, the locking claw 7 is pressed. Since the member 7 moves in the direction of the arrow X2, the claw portion 72 fits into the space formed by the second regulation surface 93, and the tip surface 72e of the claw portion 72 abuts the first regulation surface 92. This restricts the movement of the pawl portion 72 in both the axial direction and the axis-perpendicular direction, so that the male member 1 and the female member 2 are reliably connected.

Other Examples Although not shown, the present invention is, for example, a pipe joint (connector) described in Japanese Utility Model Laid-Open No. 63-74593 and a connector described in Japanese Utility Model Laid-Open No. 64-41794. It is also possible to implement with appropriate modifications. That is, the detector can be integrally added to the socket of the female joint provided with the retainer ring or the retaining member as the retaining means, and the pushing protrusion can be appropriately added to the male joint. Of course, it can be implemented in the form of

[0027]

[Effect of the device]

 According to the connector of the present invention, the detection body is pushed outward in the radial direction by the push-out projection provided separately from the locking portion for locking the holding means. Therefore, the structure of the locking portion may be concave or convex. Further, according to the connector of the present invention, it is necessary to increase the protrusion amount of the extrusion protrusion in order to increase the displacement amount of the detection body in order to facilitate visual recognition of the connection between the male member and the female member. Such change of the protrusion amount can be performed regardless of the degree of engagement between the claw portion and the engagement portion.

[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 are coupled to each other.

FIG. 2 is a diagram of a state seen from a direction of an arrow K1 in FIG.

FIG. 3 is a side view showing the upper half of the male member in section.

FIG. 4 is a side view showing a cross-section of an upper half of a female member having a locking claw member.

5 is a diagram showing a state seen from the direction of arrow K2 in FIG.

FIG. 6 is a side view showing a cross section of the upper half of the state in which the male member is being inserted into the female member.

FIG. 7 is a diagram showing a state seen from the direction of arrow K3 in FIG.

FIG. 8 is a side view in which the upper half of a state in which the male member is inserted into the female member is shown in section.

9 is a front view of the state seen from the direction of arrow K4 in FIG.

FIG. 10 is a side view showing a state in which the locking claw member and the detection body are separated and a partial cross section is shown.

11 is a diagram showing a state seen from the direction of arrow K5 in FIG.

FIG. 12 is a side view according to a second embodiment showing a cross-section of an upper half of a state in which a male member and a female member are combined.

FIG. 13 is a side view according to a third embodiment showing a cross section of the upper half of the state where the locking portion of the male member has passed over the claw portion of the locking claw member.

FIG. 14 is a plan view of the state shown in FIG.

FIG. 15 is a front view of the female member before the male member is inserted.

FIG. 16 is a front view of the male member inserted into the female member.

FIG. 17 is a side view according to the related art showing a cross section of the upper half of a state in which a male member and a female member are combined.

FIG. 18 is a sectional view taken along line TT of FIG.

[Explanation of symbols]

In the figure, 1 is a male member, 11 is a locking portion, 13 is a protruding portion, 2
Is a female member, 3 and 7 are locking claw members, 32 and 72 are claw parts,
6 and 8 show the detectors.

Claims (1)

[Scope of utility model registration request] 1. A concave or convex locking portion extending in a ring shape, an insertion end extending ahead of the locking portion, and a predetermined distance rearward of the locking portion and radially outward. A cylindrical male member having a protruding push-out protrusion, a female member having a receiving hole having a receiving opening into which the insertion end portion of the male member is inserted, and the male member and the female member are connected to each other. And a holding means for holding the same, and one of the holding means and the female member are disposed so as to be displaceable radially outward, and the insertion end portion of the male member is inserted into the receiving hole from the receiving opening. When the male member and the female member are coupled to each other and the male member is coupled to the female member, the connector is constituted by a detection body that is pushed outward in the radial direction by the pushing protrusion of the male member and displaced. .