JPH0722553Y2 - One Touch Connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial field of application) The present invention relates to a connector used for a joint of a fluid pipeline, and is used, for example, as a joint of an air pipe for a vehicle suspension. .

(Prior Art) Conventionally, as a connector of this type, there is one disclosed in Japanese Utility Model Laid-Open No. 56-120485.

In this type, the tip of the tube is expanded to form a locking portion, an O-ring is attached to the outer periphery of the tube, the tube is inserted into a small hole of the bag nut, and the bag nut is screwed into the joint body. By mating, the tube and the O-ring are fluid-tightly sandwiched between the inner wall surface of the bag nut and the inner wall surface of the joint body while the tube is joined to the joint body.

(Problems to be solved by the invention) However, in the above-mentioned conventional connector, since the tube is joined by screwing the joint body and the bag nut, it is necessary to tighten the bag nut with a specified torque using a tool. However, there was a problem that workability was poor. In particular, when the joint body is fixed to a device located in a limited space, the workability of the joining work of the tubes is extremely deteriorated.

Then, this invention makes it the technical subject to improve the workability of the connection work of the connector used for the joint part of a fluid pipeline.

[Constitution of device]

(Means for Solving the Problems) Technical means taken to solve the above-mentioned technical problem is that the connector has a tubular shape having a stepped inner hole and is opened at the inner hole on the outer periphery thereof. An adapter member having a pair of slits facing each other and having an inclined surface between the large diameter portion and the small diameter portion of the inner hole, and a stepped cylindrical member having the inclination between the large diameter portion and the small diameter portion. A connector member having a tapered surface corresponding to the surface and having an annular groove on the outer circumference of the large diameter portion and fitted into the stepped inner hole of the adapter member; and fitted into the inner hole of the connector member,
A tube having a large-diameter bead portion at its tip and having a back-up portion that is expanded on the outer periphery separated from the large-diameter bead portion by a predetermined amount and is locked to the end surface of the small-diameter portion of the connector member; An O-ring fitted between the large-diameter bead portion and the back-up portion and closely attached to the small-diameter portion of the stepped inner hole of the adapter member, and a pair of arm portions, and the pair of arm portions are elastically connected to each other. Then, the pair of arm portions are elastically fixed from the outside of the slit of the adapter member in an axially immovable manner, and the pair of arm portions inside the slit of the adapter member have the tapered surface of the connector member. And an elastic member which has a cam action and is engaged with the annular groove.

(Operation) As a result, the connection between the adapter member and the connector member is
By fitting the connector member together with the tube into the inner hole of the adapter member, while maintaining fluid tightness by the O-ring, it can be done very easily as follows. That is,
The pair of arms elastically attached to the slit of the adapter member act as a cam by the tapered surface of the connector member, and when the slit is expanded by the tapered surface and the annular groove of the connector member is aligned, the elastic force is exerted. Therefore, since the annular member is engaged with the annular groove, the connector member and the tube can be simply inserted into the inner hole of the adapter member to facilitate the joining work of the both members. Further, by providing the inclined surface between the large diameter portion and the small diameter portion of the stepped inner hole of the adapter member, it is possible to prevent the O-ring from being damaged by an edge or the like when inserting the tube into the adapter member.

(Embodiment) An embodiment of the one-touch connector according to the present invention will be described below with reference to the drawings.

The one-touch connector 10 shown in FIG. 1 is used for a joint of an air pipe of an air suspension for a vehicle,
It comprises an adapter member 11 fixed to a fluid actuated device, a connector member 20 for fluid-tightly connecting a tube 32 to the adapter member 11, and a clip spring 30. The adapter member 11 is made of metal and, as shown in FIGS. 1 to 4, has a tubular shape having a stepped inner hole 12, and a large-diameter tubular portion 13 has a pair of mutually opened inner holes 12. It has opposite slits 14. A resin-made connector member 20 is fitted in the stepped inner hole 12 of the adapter member 11. The connector member 20 has a stepped cylindrical shape, and an annular groove 23 which can be fitted to the slit 14 of the adapter member 11 at the time of fitting is formed on the outer periphery of the large diameter portion 21 and the large diameter portion. A taper surface 24 is formed between the small diameter portion 21 and the small diameter portion 22.

A tube 32 made of nylon is inserted into the inner hole 25 of the connector member 20, and a large diameter bead portion 33 guided by the small diameter hole 15 of the stepped inner hole 12 of the adapter member 11 is inserted at the tip of the tube 32. have. In the tube 32, the diameter of the tube 32 is expanded to the outer periphery that is separated from the large-diameter bead portion 33 by a predetermined amount, and the outer peripheral surface of the tube 32 is guided by the small-diameter portion 15 of the adapter member 11. A back-up portion 34, which is locked to the end face and prevents it from coming out, is integrally formed. The large-diameter bead portion 33 may be integrally molded with the tube 32, or a sleeve having a flange portion may be fitted to the open end of the tube 30. As a result, an annular groove portion 35 is formed on the outer circumference of the tube 32 by the large diameter bead portion 33 and the back up portion 34, and the outer peripheral surface of the groove portion 35 is airtightly crimped to the small diameter hole 15 of the adapter member 11. The O-ring 36 is attached.

A clip spring 30 having a pair of arm portions 31 is elastically attached to the slit 14 of the adapter member 11 so as to be immovable in the axial direction, and the pair of arm portions 31 project into the inner hole 12 of the adapter member 11. , Is engaged with the annular groove 23 of the connector member 20.

The operation of this embodiment having the above configuration will be described.

The pair of arm portions 31 of the clip spring 30 are elastically attached to the slits 14 of the adapter member 11 and the connector member 20 is inserted into the groove portion 35.
Back up part 34 of tube 32 with O-ring 36 fitted on
While locking the small diameter part 22, the stepped inner hole 12 of the adapter 11
When it is fitted into the connector member 20, the arm portion 31 of the clip spring 30 protruding into the stepped inner hole 12 of the adapter member 11 is inserted into the connector member 20.
Is abutted against the taper surface 24. This allows a pair of arm parts
A well-known cam mechanism is constituted by 31 and the tapered surface 24, and the pair of arm portions 31 are expanded in the slit 14 by the cam action as the connector member 20 is fitted, and the slit 14 is formed.
When the ring groove 23 of the connector member 20 and the ring groove 23 of the connector member coincide with each other, they are engaged in the return ring groove 23 by its elastic force. Accordingly, the arm member 31 of the clip spring 30 causes the adapter member 11
The connector member 20 and the connector member 20 are relatively immovable in the axial direction, and are securely joined.

As described above, according to the present invention, the adapter member is formed by one touch.
The 11 and the connector member 20 can be joined while maintaining airtightness by the O-ring 36 of the tube 32, and the joining work can be greatly improved.

[Effect of device]

According to the present invention, the conventional joining of the pipe joint by screwing connection is eliminated, and the elastic member is elastically attached to the outside of the slit of the adapter member and joined by the cam action of the elastic member and the tapered surface of the connector member. Therefore, the connector member can be joined in one-touch by simply fitting it into the adapter member, and the workability of joining can be greatly improved, and the outer diameter of the connector member can be made equal to the inner diameter of the adapter member.

Further, in the present invention, a large-diameter bead portion and a back-up portion are integrally formed at the tip of the tube, and an O-ring is fitted between them, so that the back-up portion comes into contact with the connector member to prevent the tube from coming off. Therefore, even if the tube is pulled from the outside, the filling rate of the O-ring does not change, and accordingly, the airtightness can be surely maintained without changing the sealing property. Further, by providing the inclined surface between the large diameter portion and the small diameter portion of the stepped inner hole of the adapter member, it is possible to prevent the O-ring from being damaged by an edge when inserting the tube into the adapter member. Play.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a one-touch connector according to the present invention, FIG. 2 is a sectional view taken along the line AA of FIG. 1, and FIG. 3 is an adapter member of the one-touch connector shown in FIG. FIG. 4 is a sectional view taken along line BB in FIG. 10 …… One-touch connector, 11 …… Adapter member, 12…
… Stepped bore, 13 …… Large diameter part, 14 …… Slit, 20 …… Connector member, 21 …… Large diameter part, 22 …… Small diameter part, 23 …… Annular groove, 24 …… Tapered surface, 30 ...... Elastic member (clip spring), 31 ...... Arm part, 32 ...... Tube, 33 ...... Large diameter bead part, 34 ...... Back up part, 36 ...... O-ring.

Claims (1)

[Scope of utility model registration request] 1. A cylindrical shape having a stepped inner hole, and a pair of slits which are open to the inner hole and which oppose each other, on the outer periphery thereof.
An adapter member having an inclined surface between the large diameter portion and the small diameter portion of the stepped inner hole, and a stepped cylindrical shape having a tapered surface corresponding to the inclined surface between the large diameter portion and the small diameter portion. A connector member that has an annular groove on the outer circumference of the large diameter portion and is fitted into the stepped inner hole of the adapter member, and a large diameter bead portion that is fitted into the inner hole of the connector member and is at the tip. A tube having a backup portion that is expanded on the outer periphery that is separated from the large diameter bead portion by a predetermined amount and that is locked to the end surface of the small diameter portion of the connector member, and is fitted between the large diameter bead portion and the backup portion of the tube. And an O-ring that is attached and closely adheres to the small diameter portion of the stepped inner hole of the adapter member, and a pair of arm portions, and the pair of arm portions are elastically connected to each other, and the pair of arm portions is the adapter. Axial movement from outside of member slit One-touch, in which the pair of arm portions are elastically fixed and elastically engaged with the tapered surface of the connector member and the annular groove inside the slit of the adapter member. connector.