JP2597325Y2 - Connector for small diameter resin tube connection - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to the connection of a resin tube having a relatively small diameter of about 20 m / m or less, which is generally provided as an oil supply / air supply path to an automobile or various machines and devices. The present invention relates to an improvement in the structure of a connector for a vehicle.

[0002]

2. Description of the Related Art Conventionally, as a connecting connector of this type, for example, as shown in FIG. 7A, a cylindrical connector having an elastic seal ring (14) provided inside a shaft hole inside a flow hole (12). FIG. 7B shows a stepped portion formed by the expanding chamber (13) of the main body (11).
In the state where the peripheral edge of the center hole as shown in (1) is engaged with the disk-shaped gripping member (15) forming the claw wall (15 '), the stopper (1
The connector was configured to be clamped by caulking at the periphery of the rear end of the connector body (11) according to 6). (17) is a stop (1
This is a release tool which is engaged with the peripheral portion of the shaft core hole of 6) and moves in the front-rear direction to release the biting of the claw wall (15 ') by the resin tube (P').

[0003]

However, in such a conventional technique, the claw wall (15 ') is formed due to the structure of the claw wall (15') associated with the disk-shaped shape of the gripping member (15). ) Is high in rigidity and the claw wall does not bend when the resin tube (P ') is inserted, causing abrasion in the tube axis direction on the outer peripheral surface of the resin tube, and further causing the grip member (15) to have a different thickness when molded. No need for a punching die for press molding for each connected resin tube (P '),
Also, because of the clamping structure by the use of the stopper (16), it is necessary to hold the positioning of the gripping member (15) inside at the time of the caulking of the stopper, and at the same time, the assembly is troublesome by the caulking work, etc. There was a problem that the product cost was high.

The present invention has been made in view of the above-mentioned problems of the prior art, and prevents the occurrence of abrasion on the outer peripheral surface of the resin tube when the resin tube is inserted. Prevents a decrease in sealing performance, and can be easily obtained by continuously forming the gripping member from a long material and cutting it in accordance with the thickness of a different resin tube. A small-diameter resin tube that eliminates the need for crimping work, makes product cost low by simplifying the assembly of the gripping member, and makes the connector itself compact so that it can be used in narrow places. It is intended to propose a connector for connection.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a connector body having a stepped expanding chamber connected to a flow hole on the tip side inside a shaft core. An annular elastic seal member is inserted into the portion, and a plurality of claw walls each having a short tongue-like shape are further inwardly inclined at an interval behind the ring-shaped elastic seal member, and the inwardly inclined axial center is formed on the peripheral wall portion. The rear end of the cylindrical annular gripping member made of a metal spring plate material having a C-shaped cross section having a slit in the direction is brought into contact with the inner peripheral wall surface of the large-diameter chamber in an elastically stretchable manner in the circumferential direction. The present invention is characterized in that a connector for connecting a small-diameter resin tube is formed by engaging with a hanging support wall protruding inward from a rear end peripheral portion of the connector body.

[0006]

According to the present invention, the gripping member has a C-shaped cross section so that the gripping member has a slit in the axial direction in the peripheral wall portion on which the short tongue-shaped claw wall is projected. Since it is formed with an annular structure and is configured to engage resiliently inside the connector body, the rigidity of the claw wall in the opening direction is low, the outer surface of the resin tube is not easily scratched, and the resin tube The rigidity of the short claw wall is high against the pulling force,
In addition, the rear end of the cylindrical portion of the gripping member is engaged with the rear edge of the connector body and has a high pull-out strength. It can be easily obtained by cutting according to the size, and the use of a separate fastener and the work of caulking are not required at all, and the product cost is reduced by the simplicity of assembly caused by the slit of the gripping member. In addition, the elastic seal member is held at a fixed position and does not move in the axial direction, and the contact between the elastic seal member and the gripping member is avoided, so that the durability of the seal member is greatly reduced. In addition, the connector itself can be made compact so that it can be used in a narrow place.

[0007]

FIG. 1 is a longitudinal sectional view of a connector for connecting a small-diameter resin tube according to the present invention in a connected state, and FIG. 2 is a gripping member of FIG. 3A is an enlarged front view, FIG. 3B is a developed view of FIG. 3A, FIG. 3 is a view corresponding to FIG. 1 of another embodiment, and FIG. 4 is a gripping member used in FIG. (A) is an enlarged front view,
(B) is a development view of (a), FIG. 5 is a view corresponding to FIG. 1 of another embodiment, and FIG. 6 is a view showing a gripping member of FIG.
Is a side view, (b) is an enlarged front view of (a), (c) is an enlarged developed view of (a), (1) is a connector body, and a screw wall (3) ), And a stepped enlarged chamber (2 ') is provided inside the shaft core following the flow hole (2) on the distal end side, and an elastic seal member (e.g., a rubber material) 5) is inserted and held. Also (4)
Is a gripping member, and a plurality of short tongues are provided on the tip end side of a metal spring plate formed continuously from a long material such as spring steel, stainless steel, phosphor bronze, etc. as shown in FIG. A flaky claw wall (4 ') is protruded inclining inward, and then the metal spring plate is formed into a cylindrical ring having a C-shaped cross section so that a peripheral wall has a slit (4 ") in the axial direction. Then, the gripping member (4) is positioned with a space behind the elastic sealing member (5) so as to protrude slightly inward of the connector body (1). (1 ') and the inner peripheral wall surface of the enlarged diameter chamber (2') are easily and elastically engaged with the slit (4 ") in a state where they are in elastic contact with the inner peripheral wall surface in the circumferential direction. Resin tube (P) with a dimensional nail wall (4 ') inserted inside
Bite into the outer peripheral surface of (6) is a release tool (Fig. 3
), And it is movably engaged with the rear edge (1 ') of the connector body (1) on the inside of the gripping member (4) if necessary, and is shortened by pressing forward. Dimensional nail wall
(4 ') can be released from biting into the resin tube (P). Incidentally, (7) is another embodiment (see FIG. 5), which is inserted into the inside of the enlarged diameter chamber (2 ') to prevent the contact between the elastic sealing member (5) and the gripping member (4), A spacer for holding the seal member at a fixed position. Further, the gripping member
A claw wall (4 ') protrudes from the middle wall of the peripheral wall of (4), the front edge of which is engaged with the spacer (7) so as to be spaced from the seal member (5), and the rear edge is It may be provided so as to be engaged with the rear edge (1 ′).

FIG. 4A and FIGS. 6A and 6B correspond to FIG.
5 and FIG. 5 show a single gripping member, which is formed by molding a metal spring plate having a shape shown in FIGS. 4b and 6c into a tubular annular shape having a C-shaped cross section.

[0009]

[Effect of the Invention] As described above, the connector for connecting a small-diameter resin tube according to the present invention particularly has a gripping member (4) made of a metal spring plate material and a short claw wall (4 ') protruding from the distal end side. The peripheral wall has a slit (4 ″) in the axial direction and is formed in a cylindrical shape with a C-shaped cross section, and the inner peripheral wall formed by the enlarged diameter chamber (2 ′) has a circumferential elasticity. With its rear end inside the connector body (1) with the
Since the connector body is configured to be engaged with the supporting wall on the side of the rear edge (1 ') of the connector body, insertion of the resin tube (P) into the claw wall (4') and deformation in the deformation direction at the time of connection. Due to its low rigidity and good flexibility, there is no abrasion on the outer surface of the resin tube (P), and the resin tube (P) is securely held because of its high rigidity in the pull-out direction.
(4) can be easily obtained by continuously molding with a long material and cutting it according to the thickness of the different resin tube (P), and also eliminates the need for separate stoppers and caulking work. Elongation and slit (4 ") over the entire length of the gripping member
The product cost can be reduced by simple assembly, and the elastic sealing member (5) can be inserted into the stepped portion of the expanded chamber (5 ') or fixed at a certain location by the spacer (7). The elastic seal member (5) and the gripping member (4) do not come into contact with each other, so that the durability of the seal member is greatly improved, and the connector itself is made compact. This is a very useful connector for connecting small-diameter resin tubes because it can be used in narrow places.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a connector for connecting a small-diameter resin tube in a connected state.

FIGS. 2A and 2B are diagrams showing a single gripping member of FIG. 1, wherein FIG. 2A is an enlarged front view and FIG. 2B is an enlarged development view of FIG.

FIG. 3 is a view corresponding to FIG. 1 of another embodiment.

4A and 4B are diagrams showing the gripping member alone in FIG. 3, wherein FIG. 4A is an enlarged front view and FIG. 4B is an enlarged development view of FIG.

FIG. 5 is a view corresponding to FIG.

6A and 6B are views showing the gripping member of FIG. 5, wherein FIG.
(B) is an enlarged front view of (a), and (c) is an expanded development view of (a).

7A and 7B are diagrams showing a conventional example, in which FIG. 7A is a longitudinal sectional view when a resin tube is connected, and FIG. 7B is an enlarged front view of the gripping member alone shown in FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 connector main body 1 ′ rear end peripheral edge 2 flow hole 2 ′ enlarged diameter chamber 3 screw wall 4 holding member 4 ′ claw wall 4 ″ slit 5 elastic seal member 6 release tool 7 spacer P resin tube

Claims (1)

(57) [Scope of request for utility model registration] 1. A connector body (1) provided with a stepped enlarged chamber (2 ') connected to a flow hole (2) on the distal end side inside a shaft core. Insert the elastic seal member (5),
Further, a plurality of claw walls (4 ') each having a short tongue-like shape are provided at an interval behind the plurality of claw walls (4'), and slits (4 ") in the axial direction are formed in the peripheral wall portions by inclining inward. A cylindrical annular gripping member (4) made of a metal spring plate material having a C-shaped cross section having the inner peripheral wall surface formed by the expanded chamber (2 ') is elastically stretched and held in the circumferential direction. End the connector body (1)
A connector for connecting a small-diameter resin tube, wherein the connector is configured to engage with a hanging support wall protruding inward from a rear end peripheral edge (1 ').