JPH0637259Y2 - Connector for small diameter piping - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention is generally applied to automobiles or various machines, equipment, etc. as a supply passage for oil supply, air supply, etc., with a pipe diameter of about 20 m / m or less. The present invention relates to a connector for connecting a metal tube having a relatively small diameter or a resin tube (hereinafter simply referred to as piping).

(Prior Art) Conventionally, as this type of connector for connection, as shown in FIG. 6, an insertion hole of a joint body 2 having an insertion hole for a pipe 1 in an axial core is provided from the inlet side to a large diameter portion and a medium diameter portion. Part, a small diameter part, a seal ring 3 is attached to the middle diameter part, the pipe 1 is inserted into the insertion hole to elastically join the outer peripheral surface of the pipe to the seal ring 3, and a pair of elastic locking pieces are provided. An opening in which a large diameter portion of the joint body 2 is provided with a ring-shaped holder 4 having a protruding portion 4a on one end side.
2a is engaged and assembled, and after inserting the pipe 1, this elastic locking piece
4a is engaged with an annular bulging wall 1a formed on the outer circumference of the pipe 1 to position and prevent the pipe 1 from coming off. 2b is a flow hole, 5 is a bush, 6 is a spacer,
7 indicates a hose.

(Problems to be Solved by the Invention) In a conventional connector for connecting a small diameter pipe, even if the pipe 1 is not firmly attached to the joint body 2 as shown in FIGS. Since the liquid does not leak under the condition that the internal pressure is low and no external force is applied, there is a problem in that it is impossible to find a defect in appearance and a problem occurs in the market.

The present invention has been made in view of the above problems of the conventional technology, and its object is to provide a pipe 4 which is disengaged from the holder 4 and the joint body 2 due to an erroneous operation. , It is intended to provide a highly safe connector capable of finding defects from the outside.

(Means for Solving the Problem) In order to achieve the above object, in the present invention, an insertion hole of a joint body having an insertion hole for a pipe in a shaft core is provided with a large diameter portion from an inlet side,
It is formed in the medium diameter portion and the small diameter portion, a seal ring is attached to the medium diameter portion, and the pipe 1 is inserted into the insertion hole to elastically join the pipe outer peripheral surface to the seal ring, while a pair of elastic locking pieces are provided. Engage a ring-shaped holder protruding from one end with an opening formed in the large diameter part of the joint body, and engage this elastic locking piece with an annular bulging wall formed on the outer circumference of the pipe. To position the pipe
In a connector configured so as to be prevented from coming off, a pair of parallel elastic arms (8a) each having a locking claw (8b) facing the tip and an elastic support portion connecting the other ends of the elastic arms (8a) ( Of the confirmation member (8) composed of 8c and 8d), the elastic support portion (8c) has a bend so as to project toward the elastic arm (8a) side, and the pipe ( 1) has a protrusion (8e) protruding toward the tip so that it can reach 1), and the locking claw (8b) of this confirmation member (8) is engaged with the locking groove (2c) of the joint body (2), When the pipe is inserted into the fitting body (2) at the proper position, the outer periphery of the annular protruding wall of the pipe and the protruding portion (8e) of the elastic support portion (8c) come into contact with each other, and the elastic support portion (8c) The flexure is extended to push and expand the elastic arm (8a), and the engagement between the locking claw (8b) and the locking groove (2c) is released, and at the same time, the elastic support portion (8c) The small diameter tubing connector that is configured to pop out check member (8) from the joint main body (2) and gist by Hatsuryoku.

(Operation) Since the present invention is configured as described above, the pipe 1 is properly assembled to the inside of the shaft core of the joint body 2, that is, the bulging wall 1a on the pipe 1 side is the annular bush. 5, the protruding portion 8e is pushed up by the bulging wall 1a, and the elastic arm 8a is expanded by the elastic force of the elastic support portion 8c. , Remove the engagement between the locking claw 8b and the locking groove 2c. Therefore, the confirmation member 8 pops out of the joint body 2 by the operation of the protruding portion 8e. Therefore, whether the pipe and the fitting body are properly connected depending on the presence of the confirmation member 8,
Whether or not it can be confirmed easily and surely.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. First
FIG. 3 is an exploded perspective view of the connector for connecting a small diameter pipe of the present invention, in which a holder is omitted, FIG. 2 is a sectional view of the connector of the present invention in which a confirmation member is incorporated, and FIG. As shown in the drawing, the structure of the connector is the same as that of the conventional one shown in FIG. 6, and the insertion hole of the joint body 2 having the insertion hole for the pipe 1 in the shaft core is inserted from the inlet side to the large diameter portion, the medium diameter portion, It is formed in a small diameter portion, the seal ring 3 is attached to the middle diameter portion, the pipe 1 is inserted into the insertion hole, and the outer peripheral surface of the pipe is elastically joined to the seal ring 3. On the other hand, the ring-shaped holder 4 having a pair of opposing elastic locking pieces 4a projecting from one end side is engaged with the opening 2a formed in the large diameter portion of the joint body 2 so that the elastic locking pieces 4a The tip is engaged with an annular bulging wall 1a formed on the outer circumference of the pipe 1 to position and prevent the pipe 1 from falling out. A pair of parallel elastic arms 8a to which the claws 8b are attached and a confirmation member 8 composed of elastic supporting portions 8c and 8d connecting the other ends are separately provided, and the elastic supporting portions 8c are bent so as to project toward the elastic arm 8a. Has a protrusion 8e that protrudes toward the tip almost at the center.
The other elastic support portion 8d serves to hold the other end of the elastic arm.

The checking member 8 configured as described above is configured such that the locking claw 8b is engaged with the locking groove 2c provided in the joint body 2, and the protrusion 8e is inserted from the opening 2a of the joint body 2 and reaches the pipe 1. That is, the pipe 1 is assembled to the joint body at a slight interval, and in that case, when the pipe 1 is inserted into the joint body at the proper position (see FIG. 6), the annular protruding wall 1a of the pipe 1 is inserted. The outer periphery of the elastic support portion 8c is brought into contact with the protruding portion 8e of the elastic support portion 8c.
It is configured to extend the flexure of.

By doing so, as shown in FIG. 3, the elastic arm 8a is expanded and the engaging claw 8b and the engaging groove 2c are disengaged. At the same time, the confirmation member 8 pops out of the joint body 2 by the elastic force of the elastic support portion 8c.

In the above embodiment, the opening 2a provided in the joint body 2 has the hole into which the protrusion 8e of the elastic support 8c is inserted.
An insertion hole 9 may be separately provided in the joint body 2 as shown in FIG. However, in that case, the assembly of the confirmation member 8 and the joint body 2 uses the opening 2a, and the elastic support portion 8c and the joint body 2 are used.
And held on the outer surface of.

By doing so, the suitability of the assembled state can be confirmed from the outside depending on whether or not the confirmation member 8 is attached to the joint body 2.

(Effect of the Invention) As described above, in the connector for small-diameter pipe connection according to the present invention, the confirmation member pops out when the pipe 1 is inserted into the fitting body to the proper position. It is possible to confirm whether or not is properly connected not only during connection work but also after connection.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of the connector for connecting a small diameter pipe of the present invention in which a holder is omitted, FIG. 2 is a sectional view of the connector of the present invention in which a confirmation member is also incorporated, and FIG. Four
FIG. 5 is an exploded perspective view of another embodiment in which a holder is omitted, FIG. 5 is a sectional view in which the same confirmation member is incorporated, and FIGS.
The figure is a cross-sectional view of a conventional example. 1 ... Piping, 1a ... Bulging wall, 2 ... Joint body, 2a ... Opening part, 2b
... Flow hole, 2c ... Locking groove, 3 ... Seal ring, 4 ... Holder, 4a ... Elastic locking piece, 5 ... Bushing, 8 ... Checking member, 8a
... Elastic arm, 8b ... Locking piece, 8c, 8d ... Elastic support, 8e ...
Projection, 9 ... Insertion hole

Claims (1)

[Scope of utility model registration request] 1. An insertion hole of a joint body having a pipe insertion hole in a shaft core is formed in a large diameter portion, a medium diameter portion, and a small diameter portion from an inlet side, and a seal ring is attached to the medium diameter portion, and a pipe (1 ) Is inserted into the insertion hole to elastically join the outer peripheral surface of the pipe to the seal ring, while a ring-shaped holder with a pair of elastic locking pieces protruding from one end is drilled in the large diameter part of the joint body. In the connector configured to engage the opening provided and engage the elastic locking piece with the annular bulging wall formed on the outer circumference of the pipe to position and prevent the pipe from coming off, Locking claw (8
Of the confirmation member (8) consisting of a pair of parallel elastic arms (8a) having b) and elastic support parts (8c, 8d) connecting the other ends of the elastic arms (8a), the elastic support part (8c) ) Has a bending so as to project to the elastic arm (8a) side, and has a projecting portion (8e) projecting toward the tip so as to reach the pipe (1) in the joint body (2) at approximately the center. , The engagement claw (8b) of the confirmation member (8) is engaged with the engagement groove (2c) of the joint body (2), and the pipe is inserted into the joint body (2) at the proper position. The outer periphery of the annular bulging wall of and the protruding portion (8e) of the elastic support portion (8c) are in contact with each other, and the elastic support portion (8c)
The elastic member (8a) is pushed and expanded to disengage the engaging claw (8b) and the engaging groove (2c), and at the same time, the elastic support (8c) is elastically urged to check the member (8). ) Is configured to pop out from the joint body (2).