JPH09273686A - Small-diameter pipe connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily perform connection in a narrow place and release of connection of a pipe by miniaturizing the whole connector. SOLUTION: An elastic seal ring member 6 and a bush member 7 are internally mounted in a small-diameter chamber of a connector 1 penetrating a small-diameter chamber 3' and a large-diameter chamber 3 communicated with a flowing hole 4, and respective notched window grooves 1' the front ends of which are made as step 1'' are oppositely bored in a circumferential wall part of the large-diameter chamber 3, and in the notched window grooves 1', rear end parts of respective pawl walls 5' made of an elastic metal sheet are firmly fixed to the rear part on the connector 1 side. A retainer member 5 provided with a grip lever 5'' continued to the tip of the pawl wall, outward bent, and provided with a hooking pawl on a part is integrally mounted, and annular expanded wall part P' on the pipe side incorporated by the tip of the claw wall 5' in the connecting state of a pipe P is press locked, and the pipe is drawn by pulling outward the grip lever 5'' in releasing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention generally relates to an automobile or various machines, devices, etc., provided with a pipe diameter provided as a supply passage for oil supply and air supply, and a relatively small diameter of about 20 m / m or less. The present invention relates to a connector for connecting a metal tube or a hard resin tube (hereinafter simply referred to as piping).

[0002]

2. Description of the Related Art Conventionally, as a connecting connector of this kind, as shown in FIG. 8, for example, a rear end periphery of an engagement hole (25) formed by a notched window groove formed in a peripheral wall portion of a connector (21). A socket body having a plurality of claw walls (23) inclining inward at the front edge in the direction of assembly of the hole wall portion of the shaft center hole at the hole edge of the hanging wall (21 ') With (22),
The cylindrical annular peripheral wall (23 ') on the rear end side is inserted and fitted inside with the shoulder (24) formed by the base engaged, and the annular bulging wall (P ₀ ) of the pipe (P ₀ ) incorporated therein ( The P ₀ ′ part was configured to be pressed by the claw wall (23).
In addition, (21 ″) is a projecting wall on the front end side, into which a resin tube is inserted and connected.

[0003]

However, in such a conventional technique, the annular wall portion formed by the shoulder portion (24) is crushed when the socket body (22) is assembled, and the hanging wall (21 ') is crushed. Since it will pass through the inside of
It will be extremely troublesome for these assembly work,
Further, in connection with the engagement at the shoulder portion (24), the socket body (22) is generally made to have a large diameter and the claw wall (23) is required to be long, so that the connector (21) as a whole can be made compact. Moreover, when the connection of the pipe (P ₀ ) is released, it is not possible to easily release the engagement pressure from the bulging wall (P ₀ ′) at the claw wall (23), and the unreasonable pipe (P ₀ ) However, there was a problem that the nail wall portion was often deformed or damaged by pulling out.

The present invention has been made in view of the above-mentioned problems of the prior art, and it is not necessary to separately install a retainer member inside a connector, and the entire connector is made compact so that connection at a narrow place is possible. It is stable and does not cause displacement of the engagement pressure on the claw wall, and it is extremely easy to separate the claw wall from the bulging wall when the pipe is disconnected. It is an object of the present invention to provide a connector for connecting a small diameter pipe that can be used in

[0005]

According to the present invention, in order to achieve the above object, a small diameter chamber and a large diameter chamber, which are connected to a flow hole of a connecting cylinder wall on the distal end side, are formed in the shaft core so as to extend therethrough. An elastic seal ring member and a tubular ring-shaped bush member are housed in the small diameter chamber of the connector, and the front end edge is formed as a step facing the peripheral wall of the large diameter chamber. In the notched window groove part, the front part is made into a claw wall protruding forward by a metal elastic plate material, and the rear end part is fixed near the rear part of the connector side, and it is connected to the tip part of the claw wall and outwardly. The retainer member is bent inwardly and has a hooking claw on a part of it so as to project, so that the retainer member is urged inward to be housed inside The annular bulging wall portion on the pipe side, which is incorporated in the The gist of the present invention is a connector for small-diameter pipe connection, which is configured to pull out a pipe by engaging and holding the hooking pawl portion with a step portion by pulling the lever outwardly. Formed so that the tip end portion is formed as a hook wall bent forward, and is locked by the hook wall portion to the inner peripheral surface of the large diameter chamber when the pipe is connected, and is engaged and held with the step portion when released. It is something to do.

With the above-mentioned structure, the present invention can eliminate the need for separately assembling the retainer member due to the fixing structure of the retainer member such as a mold, and further has the hooking pawl. With the structure provided with, by retaining the engagement of the hooking pawl to the step portion when the pressure is released from the connected state of the pipe, the pawl wall can be detached from the bulging wall very easily. Become.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a rear view of a connector for connecting a small diameter pipe of the present invention in a pipe connection state, and FIG. FIG. 3 is a vertical cross-sectional view of the line A, and FIG. 3 is an explanatory view when disconnecting the pipe of FIG.
4 is a perspective view of the retainer member alone in FIG. 1, FIG. 5 is a view corresponding to FIG. 2 of the other embodiment, FIG. 6 is an explanatory view when disconnecting the pipe of FIG. 5, and FIG. FIG. 1 is a perspective view of a retainer member alone, in which (1) is a connector, and a connector tube is provided in a through hole (4) of a connecting cylinder wall (2) for inserting a resin tube or a rubber hose protruding from the tip side of the shaft core. A small-diameter chamber (3 ') and a large-diameter chamber (3), which are continuously expanded in diameter, are provided so as to penetrate, and a front edge is formed as a stepped portion (1 ") facing a peripheral wall part of the large-diameter chamber. A notched window groove (1 ') is provided, and an elastic seal ring member (6) and a tubular ring-shaped bush member (7) are internally provided in the small diameter chamber (3').

The notch window groove (1 ') is formed with a claw wall (5') whose front portion is projected forward by a metal elastic plate material, and is connected to the tip of the claw wall and outwardly. Retainer member (5) provided with a knob lever (5 ″) that is bent and has a hook (5 ″ ″) in a part thereof
Is injection-molded with the resin material of the connector (1), the rear end side is molded and fixed, and the claw wall (5 ') is biased inward to be internally mounted. .

Thus, at the time of connecting the pipe (P), the annular wall (P ') of the pipe is abutted against the pawl wall (5') when the pipe is installed inside the pawl wall (5 '). The portion is pushed outward, and then the bulging wall portion is pressed by the inward urging force of the claw wall (5 ').

Further, at the time of releasing it, the engaging pressure is released by engaging the step portion (1 ") with the hooking pawl (5""by pulling the knob lever (5") outward. The pipe (P) is pulled out in the holding state by the engagement.

As shown in FIG. 5, if desired, a hook wall (8) bent forward is provided at the tip of the hook (5 "") to form the inner circumference of the large diameter chamber (3). Of course, even if the claw wall (5 ′) is locked to the surface and an external force is applied to the claw wall (5 ′) from the outside, the claw wall may be provided with a function to prevent the claw wall from slipping. is there.

[0012]

As described above, the connector for connecting a small diameter pipe according to the present invention has the retainer member (5) which is molded and fixed at the time of thermal spray molding of the connector (1).
And the grip lever (5 ″) having a hooking claw (5 ″ ″) at the tip of the claw wall (5 ′) formed by the retainer member, and the hooking claw is cut on the connector (1) side. Notch window groove (1 ')
Since it is configured to engage and hold the stepped portion (1 ″) formed by the connector (1) at the time of disconnection, it is not necessary to separately install the retainer member (5) inside the connector (1), and at the same time, the entire connector (1) Can be made compact without hindering the connection in a tight place, and can be made stable due to the dislocation of the engagement pressure at the claw wall (5 '), and from the connected state of the pipe (P). When releasing, the claw wall (5 ') can be detached from the bulging wall (P') very easily.
It is a very useful connector for small diameter piping.

[Brief description of drawings]

FIG. 1 is a rear view of a small-diameter pipe connection connector according to an embodiment of the present invention in a pipe connection state.

FIG. 2 is a vertical cross-sectional view taken along the line AA of FIG.

FIG. 3 is an explanatory diagram when the connection of the pipe of FIG. 2 is released.

4 is a perspective view of a single retainer member of FIG. 1. FIG.

FIG. 5 is a view corresponding to FIG. 2 of the same as another embodiment.

FIG. 6 is an explanatory diagram when the connection of the pipe of FIG. 5 is released.

FIG. 7 is a perspective view of a single retainer member of FIG.

FIG. 8 is a partially cutaway sectional view of a conventional connector for connecting a small diameter pipe.

[Explanation of symbols]

 1 Connector 1'Notch Window Groove 1 "Step 2 Connection Tube Wall 3 Large Diameter Chamber 3'Small Diameter Chamber 4 Distribution Hole 5 Retainer Member 5'Claw Wall 5" Grip Lever 5 "'Retaining Claw 6 Elastic Seal Ring Member 7 Bush member 8 Hook wall P Piping P'annular bulging wall

Claims (2)

[Claims] 1. A small-diameter chamber (3 ') and a large-diameter chamber (3), which are expanded in diameter and extend through a communication hole (4) of a connecting cylinder wall (2) on the tip side, are provided inside the shaft core. An elastic seal ring member (6) and a tubular ring-shaped bush member (7) are housed in the small diameter portion of the connector (1), and the front end edge of the connector (1) faces the peripheral wall portion formed by the large diameter chamber (3). Is formed as a step (1 ″) in each notched window groove (1 ′), and a metal elastic plate member forms a claw wall (5 ′) projecting the front part forward so that the rear end part is formed. A knob that is fixed near the rear of the connector (1) side, is connected to the tip of the claw wall, is bent outward, and has a hanging claw (5 ″ ″) on a part of the knob. The retainer member (5) equipped with the lever (5 ″) is urged inward to be internally mounted, and when the pipe (P) is connected, the retainer member (5) is internally moved by the tip portion of the claw wall (5 ′). The built-in annular bulging wall (P ') portion on the piping side is pressed, and at the time of releasing the pulling lever (5 "), the latching pawl (5"") is stepped. A connector for connecting a small diameter pipe, characterized in that the pipe (P) is pulled out by engaging and holding the portion (1 ″). 2. A hook wall (8) bent forward is formed at the tip of the hook (5 ″ ″), and the large wall chamber (3) is connected by the hook wall when the pipe (P) is connected. 2. The connector for connecting a small diameter pipe according to claim 1, wherein the connector is formed so as to be locked to the inner peripheral surface of), and to be engaged and held with the step (1 ″) when the lock is released.