JPH0315908Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a pipe connector used for joining metal pipes, rubber hoses, etc., and particularly relates to improvements in pipe connectors that can be quickly joined.

BACKGROUND TECHNOLOGY As is well known, for example, in the manufacturing process of automobiles, there are cases where it is required to connect a refrigerant pipe of a car air conditioner to a rubber hose. Pipe connectors are required to be able to complete the work and have reliable joints, ie, positive locking means. For this reason, a pipe connector as shown in FIG. 5 has been proposed in Japanese Patent Laid-Open No. 107493/1983. That is, the pipe connector shown in FIG. 5 is equipped with a cylindrical connector socket A that is integrally formed at the tip of a rubber hose (not shown), and a collar B is provided inside the connector socket A to prevent extraction. The tip of the pipe C that has been inserted is inserted. A sleeve D and an O-ring E are disposed on the inner circumferential surface of the connector socket A for sealing with the outer circumferential surface of the tip end of the pipe C, and on the circumferential wall of the connector socket A there are arranged a sleeve D and an O-ring E as shown by arrow X. A lock hole G is formed into which a "U"-shaped lock member F (lock member) can be inserted from the direction.

Problems to be Solved by the Invention However, with such conventional pipe connectors, the connector socket A must be specially molded into the rubber hose, etc., resulting in a relatively high product cost, and the actual fitting requires separate preparation. After inserting the screwdriver F into the lock hole G from the direction of arrow X, it is necessary to connect the pipe C to the connector socket A, which makes the work process complicated and time-consuming. There is a risk that it may cause Furthermore, since the connector F is inserted into the connector socket A from the direction of the arrow X, a space for insertion is required in the same direction, making it difficult to work in a narrow space.

In view of the problems of conventional pipe connectors as described above, the present invention has a low manufacturing cost, can lock joined pipes just by inserting it, and can ensure jointing even in narrow spaces. To obtain a pipe connector which can be used to perform various operations and easily know whether or not it is in a locked state.

Means for Solving the Problems In order to achieve this objective, the present invention provides a sealing member that seals between the inner peripheral surface of the connector socket that receives the joint end of the pipe to be connected and the outer peripheral surface of the pipe. A lock claw is provided in the connector socket to lock the bead of the pipe and prevent the pipe from being pulled out, and a guide bead to be formed on the circumferential surface of the pipe is spaced apart from the bead. The present invention proposes that an engageable sensing pawl is integrally molded on the lock ring, and the lock state can be determined by the engagement state between the sensing pawl and the guide bead, which can be observed from the outside.

Embodiments Hereinafter, details of embodiments of the present invention will be explained with reference to FIGS. 1 to 4.

The illustrated embodiment shows a pipe connector designed for connecting a thick rubber hose 1 and a metal pipe 2, such as in the piping system of a car air conditioner. A bead portion 2b is provided at the joint end 2a of the pipe 2.
A guide bead 2c spaced apart from this bead portion 2b is formed, and the joint end 1a of the rubber hose 1 is attached to the base 3 of a connector socket 3 made of a metal tube.
It is press-fitted into a. That is, the joint end 2a of the pipe 2
is inserted into the inside of the connector socket 3, but in order to seal between the pipe 2 and the connector socket 3, there is a pipe 2 in the middle part of the connector socket 3 that is pressed against the outer peripheral surface of the pipe 2. O-rings 4 and 5, a pressure ring 6, and a pressure sleeve 7 are arranged. A pair of locking claws 8A and 8B, which are cut and raised from a locking ring 8 that is in contact with one end of the pressurizing sleeve 7, are built into the tip 3b of the connector socket 3 whose diameter has been enlarged. In other words, the bent portions 8a of these lock claws 8A and 8B bent into a "V" shape are provided at positions 180 degrees apart in the circumferential direction of the lock ring 8.
Since it is held in contact with the inner circumferential curl 3c of the connector socket 3 folded inward, the lock claws 8A,
The lock ring 8, O-rings 4, 5, pressure ring 6, and pressure sleeve 7 that hold the connector 8B are prevented from falling off from the connector socket 3 by the lock claws 8A, 8B holding the inner circumferential curl 3c. , are held concentrically with respect to the connector socket 3. Further, the end claws 8b of each of the locking claws 8A, 8B which can be elastically deformed face the bead portion 2b of the pipe 2 to be inserted into the connector socket 3.

Further, a pair of sensing claws 8C and 8D are integrally molded on the locking ring 8 and are spaced 90 degrees apart from the locking claws 8A and 8B, respectively, and the bead portion 2
Sensing claws 8C and 8D, which are inserted through the connector socket 3 so as not to contact the guide bead 2c, have engaging hooks 8d that can engage with the reference bead 2c. In other words, the distance between the engagement hooks 8d of these sensing claws 8C, 8D and the tip claws 8b of the aforementioned locking claws 8A, 8B is equal to the distance between the bead portion 2 of the pipe 2.
b and the reference bead 2c.

Since the pipe connector of the illustrated embodiment has the above-described structure, when connecting the rubber hose 1 and the pipe 2, the center of the pipe 2 should be placed at the tip 3b of the connector socket 3 into which the rubber hose 1 is press-fitted in advance. When the pipes 2 are aligned and forcefully pushed into the connector socket 3, the tip claws 8b of each locking claw 8A, 8B will overcome the bead portion 2b of the pipe 2, and the connection state shown in FIG. 2 will be obtained. Automatically becomes locked. In other words, in this connected state, the O-rings 4 and 5 are connected between the connector socket 3 and the pipe 2.
Not only is it sealed by the locking claw 8
Since the pipe 2 is prevented from being pulled out from the connector socket 3 by A and 8B, the relationship between the connected rubber hose 1 and the pipe 2 is locked.
In this case, the joint end 2a of the pipe 2 is fully inserted into the connector socket 3, and each lock claw 8
Bead part 2b of pipe 2 with tip claw 8b of A, 8B
When the sensing claws 8C and 8D are locked, the end engaging hooks 8d of the sensing claws 8C and 8D are engaged with the reference bead 2c as shown in FIG. Therefore, by simply glancing at the state of engagement between the engaging hooks 8d and the reference bead 2c, it can be determined that the connector socket 3 and the pipe 2 are in a completely locked state.

Also, as shown by the imaginary line in FIG.
If the tip claws 8b of A and 8B are not fully connected to the bead portion 2b, the sensing claws 8C and
Since the engaging hook 8d of 8D does not engage with the reference bead 2c, it is easy to see that the connector socket 3
It can be identified that pipe 2 is in an unsafe locked state.

In the above embodiment, the two O-rings 4 and 5 provide a seal between the connector socket 3 and the pipe 2, but the present invention is not limited to this sealing structure. Of course.

Effects of the invention As is clear from the above explanation, in the present invention, it is only necessary to process the bead part and guide bead on the pipe to be joined, so the pipe can be manufactured using the normal pipe processing process, so the manufacturing cost is reduced. It will be cheaper. In addition, with the pipe connector according to the present invention, the work can be completed by simply pushing the pipe into the connector socket, so the work can be carried out easily even in a narrow space, and the state of engagement between the sensing claw and the guide bead can be seen at a glance from the outside. By simply checking whether or not the connector socket and pipe are locked, you can know in advance if there is a connection failure, completely preventing accidents caused by connection failure, and automatically locking the connection status. Since it is done regularly, there is no need to worry about forgetting to do the locking operation.

[Brief explanation of the drawing]

Fig. 1 is an exploded sectional view of the pipe connector according to the present invention, Fig. 2 is a sectional view of the pipe connector in a connected state, Fig. 3 is an overall perspective view of the lock ring used in the pipe connector, and Fig. 4 is the same as Fig. 2. FIG. 5 is a cross-sectional view of a conventional pipe connector. 1...Rubber hose, 2...Pipe, 2b...Bead portion, 2c...Standard bead, 3...Connector socket, 8A, 8B...Lock claw, 8C, 8D...
...Sensing claw, 8d...Engagement hook.

Claims (1)

[Scope of utility model registration request] A sealing member is provided on the inner circumferential surface of the connector socket that receives the joint end of the pipe to be connected, and seals between it and the outer circumferential surface of the pipe, and the bead portion of the pipe is locked in the connector socket. A locking ring having a locking pawl that prevents the pipe from being pulled out is disposed, and a sensing pawl that can engage with a guide bead formed on the circumferential surface of the pipe while being spaced apart from the bead portion is integrally molded on the locking ring. A pipe connector characterized in that the locked state can be determined by the observable engagement state between the sensing claw and the reference bead.