JPH0637258Y2 - Connector for small diameter piping - Google Patents

Description

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

(Prior Art) Conventionally, as this type of connection connector, as shown in FIG. 6, the insertion hole of the joint main body 2 having the insertion hole of the pipe 1 in the shaft core is provided with a large diameter portion and a medium diameter portion from the inlet side. , The 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, a ring-shaped holder 4 having a pair of elastic locking pieces 4a projecting from one end is provided with an opening 2a formed in the large diameter portion of the joint body 2.
After the pipe 1 is inserted, the elastic locking piece 4a
Is engaged with an annular bulging wall 1a formed on the outer periphery 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 purpose is to provide the pipe 1
However, if the holder 4 and the joint body 2 are disengaged due to an erroneous operation, it is intended to provide a highly safe connector so that a defect can be found 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 joint configured to prevent slipping out, confirmation of two holding members (8, 9) of elastic bodies that are arranged in the axial direction of the joint body (2) and are connected by a connecting member (10) A member (P) is separately provided, and one holding member (8) has a pair of elastic arms (8a) arranged in parallel, and a locking claw (8b) provided so as to face the tip thereof. The other end is connected by a substantially U-shaped connecting portion (8c), and an elastic supporting portion (8d) having a bend so as to push up to both elastic arms (8a) side near the connection of the connecting portion (8c). And a protruding portion (8e) protruding in the distal direction at substantially the center thereof, and the other holding member (9) except for the elastic supporting portion (8d) of the one holding member (8). In front of the confirmation member (P), they have almost the same shape and have opposite protruding walls (9a) whose front end in the assembly direction of the pipe is a tapered inclined surface (9b). The locking claw (8b) engages with the locking groove (2c) provided in the joint body (2) and is attached to the opening (2a) of the joint body (2). The contact between the annular bulging wall and the protruding portion (8e) of the elastic support portion (8d) extends the flexure of the elastic support portion (8d) to push the elastic arm (8a) wide, and the locking claw (8b). And the engagement groove (2c) are disengaged, and the confirmation member (P) is configured to pop out from the joint body 2 by the elastic force of the elastic support portion (8d), and further, the retaining member (4) is elastically engaged. While the piece (4a) is engaged with the annular bulging wall, the protruding wall (9) of the holding member (9) is
The gist of the present invention is a connector for connecting a small diameter pipe, which is configured so that a) and the elastic locking piece (4a) come into contact with each other and the confirmation member (P) does not come off.

(Operation) Since the present invention is configured as described above, the assembly state of the pipe 1 into the shaft core of the joint body 2 is appropriate, that is,
In the state where the bulging wall 1a on the pipe 1 side is located between the annular bush 5 and the tip of the locking claw 4a (see FIG. 6), the bulging wall 1a pushes up the protruding portion 8e, and the elastic support portion The elastic arm 8a is pushed and spread by the elastic force of 8d to disengage the locking claw 8b and the locking groove 2c from each other, while the elastic locking piece 4a of the holder 4 rides over the bulging wall 1a of the pipe 1 and becomes regular. In the closed state (see FIG. 6), the protruding wall 9b of the holding member 9 and the elastic locking piece 4a do not come into contact with each other, so that the confirmation member P moves by the operation of the protruding portion 8e.
Jump out of. However, in other states, that is, in the state shown in FIG. 7, the bulging wall 1a and the protruding portion 8e do not contact each other, so that the elastic support portion 8d is not bent, and in the state shown in FIG. The confirmation member P does not come out because the 4a and the protruding wall 9a are in contact with each other. Therefore, whether or not the pipe and the joint body are properly connected can be easily and surely confirmed by the presence or absence of the confirmation member.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. First
FIG. 2 is an exploded perspective view of the connector for connecting a small diameter pipe of the present invention, FIG. 2 is a front view of the connector of the present invention incorporating a confirmation member, FIG. 3 is a rear view of FIG. 2, and FIG. FIG. 5 is a sectional view taken along the line AA of FIG. 5, and FIG. 5 is a sectional view taken along the line BB of 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, a pair of opposed elastic locking pieces 4a engages the ring-shaped holder 4 projecting at one end side with the opening 2a formed in the large diameter portion of the joint body 2 and the elastic locking pieces 4a The tip of the pipe 1 is engaged with an annular bulging wall 1a formed on the outer periphery of the pipe 1 to position and prevent the pipe 1 from coming off.
As shown in FIG. 5 to FIG. 5, a confirmation member P consisting of two holding members 8 and 9 of elastic bodies arranged in parallel in the axial direction of the joint body 2 is separately provided.

On one of the holding members 8, a pair of elastic arms 8a arranged in parallel and a locking claw 8b facing the tip on one side thereof.
And the other ends are connected by a substantially U-shaped connecting member 8c. Further, an elastic support portion 8d having a bend so as to push up both elastic arms 8a is provided on the both elastic arm 8a side near the coupling of the connecting member 8c, and a projecting portion 8e projecting in the tip direction is provided at substantially the center thereof. There is.

Next, the other holding member 9 is one of the supporting members 8
Except for the elastic supporting portion 8d, a protruding wall 9a having a tapered inclined surface 9b is provided to face the front surface of the pipe 1 in the assembling direction so as to face each other, and both holding members 8 and 9 are substantially U-shaped. Character connection 8c,
It is connected by the connecting member 10 at the end of 9c.

In the confirmation member P configured as described above, the locking claw 8b is engaged with the locking groove 2c provided in the joint body 2 and attached to the opening 2a of the joint body 2, and the pipe 1 is properly inserted into the joint. Then,
The annular bulging wall 1a (see FIG. 6) of the pipe 1 pushes up the protruding portion 8e of the elastic support portion 8d to extend the bending of the elastic support portion 8d,
The elastic arm 8a is pushed and expanded, and the engagement between the locking claw 8b and the locking groove 2c is removed. On the other hand, the protruding wall 9a of the holding member 9 is attached to the side surface of the elastic locking piece 4a while the annular bulging wall 1a pushes the tip of the elastic locking piece 4a of the holding tool 4 by inserting the pipe 1. Although it does not come off due to contact, the protruding wall 9a does not come into contact with the elastic locking piece 4a when it is in the normal state after passing (see FIG. 6), that is, when the tip of the elastic locking piece 4a is completely on the surface of the pipe 1 again. It does not come into contact. Therefore, when the pipe 1 is in the proper assembly position of the joint body 2, the confirmation member P is pushed out of the connector by pushing up the protrusion 8e. Thus, the suitability of the assembled state can be confirmed from the outside depending on whether or not the confirmation member P is attached to the joint body 2.

(Effects of the Invention) As described above, the connector for connecting a small diameter pipe according to the present invention has the holding members 8 and 9 attached to the opening 2a of the joint body 2,
When the locking claw 8a is engaged with the locking groove 2c of the joint body 2 and fixed, and the connecting side of the pipe 1 is properly assembled to the joint body 2, the confirming member P will pop out. P
It is possible to easily check the suitability of the assembly condition from the outside not only during the connection work but also after the connection work by checking whether or not the connector is disengaged from the joint body 2. This is extremely effective because it can maintain a reliable connection without accidents such as leakage or disconnection.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a connector for connecting a small diameter pipe of the present invention, FIG. 2 is a front view of the connector of the present invention in which a confirmation member is incorporated, FIG. 3 is a rear view of FIG. 2, and FIG. 2 is a sectional view taken along the line AA of FIG. 2, FIG. 5 is a sectional view taken along the line BB of FIG. 2, and FIGS. 6 to 8 are sectional views of a conventional example. 1 ... Piping, 1a ... Bulging wall, 2 ... Joint body, 2a ... Opening part, 2c
... locking groove, 3 ... seal ring, 4 ... retainer, 4a ... elastic locking piece, 8, 9 ... holding member, 8a ... elastic arm, 8b ... locking claw, 8
c ... connecting portion, 8d ... elastic supporting portion, 8e ... projecting portion, 9a ... projecting wall, 9b ... tapered inclined surface, 9c ... connecting portion, 10 ... connecting member

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. A joint main body (2) which is configured to engage with an opening provided and engage the elastic locking piece with an annular bulging wall formed on the outer circumference of the pipe to position and prevent the pipe from coming off. A confirmation member (P) composed of two holding members (8, 9) of the elastic body, which are arranged in parallel in the axial direction of the two and are connected by a connecting member (10), is separately provided, and one holding member (8) is provided. ) Has a pair of elastic arms (8a) arranged in parallel with each other, and a locking claw (8b) provided so as to face its tip, and the other end is substantially U-shaped. The elastic support part (8d) which is connected by a ring-shaped connection part (8c) and has a bend so as to push up to both elastic arms (8a) near the connection of the connection part (8c), and almost the central part thereof. Has a projecting portion (8e) projecting in the tip direction, and the other holding member (9) is substantially the same shape except for the elastic supporting portion (8d) of the one holding member (8), Has opposing protruding walls (9a) with the front surface in the assembly direction of the pipe being a tapered inclined surface (9b), and the locking claw (8b) of the confirmation member (P) is provided on the joint body (2). The opening (2a) of the joint body (2) engages with the locking groove (2c)
When the pipe is properly assembled, the elastic bulge of the elastic support part (8d) is extended by the contact between the annular bulging wall of the pipe and the protruding part (8e) of the elastic support part (8d), and the elastic arm is extended. (8a) is pushed out to disengage the locking claw (8b) from the locking groove (2c), and the confirmation member (P) is popped out of the joint body 2 by the elastic force of the elastic support portion (8d). In addition, while the elastic locking piece (4a) of the holder (4) is engaged with the annular bulging wall, the protruding wall (9a) of the holding member (9) and the elastic locking piece (4) are held.
A connector for connecting a small diameter pipe, characterized in that the confirmation member (P) does not come off due to contact with a).