JPH09119578A - Connector for connecting small diameter pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the arrangement and connection even in a restricted area, and also maintain stable connecting condition for over a long period. SOLUTION: An elastic seal ring member 6 and an annular bush member 7 are installed into the small diameter chamber part of a connector main body 1 which is installed inside a core through an enlarged stepping small diameter chamber 3' and a large diameter chamber 3 leading to the connection hole 4 of a connection tube wall 2 on the top end side. Also an elastic tongue wall 1' which is provided with a projected wall 1'a formed thinner toward the top end side at least on a part is provided integrally in the notch groove part 1" drilled in the opposed part of a surrounding wall formed by the large diameter chamber 3. Then a slide ring member which is free to move in the axial direction to connect the annular expanded wall part P' near the top end of a pipe by pressing elastically by the top end part of the projected wall 1' a by moving the projected wall part 1' to the inside in the connection of a pipe P is installed on the outside of the surrounding wall of the large diameter chamber.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art Conventionally, as a connector of this type, as shown in FIG. 13, a hanging wall formed by a rear end periphery of an engagement hole (25) formed in a peripheral wall portion of a connector body (21). A separate socket body (22) in which a plurality of claw walls (23) inclined inwardly in front of the peripheral wall portion of the axial center hole are assembled at the hole edge portion of (21 ′) ), The shoulder portion (24) is attached to the interior, and the annular bulging wall (P ₀ ') of the pipe (P ₀ ) located inside is pressed by the claw wall (23). Was there.
Reference numeral (21 ") is a protruding wall on the tip side of the connector body (21), into which a resin tube or a rubber hose is inserted for connection.

[0003]

However, in such a conventional technique, the socket body (22) engaged with the hanging wall (21 ') formed by the engagement hole (25) of the connector body (21). Since the structure is a separate body, the annular wall portion formed by the shoulder portion (24) made of the thick wall of the socket body is crushed inward so that it can pass through the inside of the hanging wall (21 ') when assembled. As a result, the assembly work is troublesome and the socket body (22)
Since the diameter of the connector is generally large, the entire connector naturally has a large diameter, which often causes a problem in arrangement and connection at a strict location.

The present invention has been made in view of the above problems of the prior art, and in particular, as in the prior art, the functional portion as the claw wall is provided integrally with the connector body, and a movable slide ring member is provided. By mounting and configuring, there is no need to use a separate socket body and its assembling work. At the same time, the overall shape of the connector is simple and compact, and it can be installed and connected even in a narrow place. It is an object of the present invention to provide a connector for small-diameter pipe connection that enables easy operation and can always obtain a stable connection state for a long period of time.

[0005]

In order to achieve the above object, the present invention has a stepped small-diameter chamber and a large-diameter chamber, which are extended in diameter and extend in a shaft core and which communicate with a flow hole of a connecting cylinder wall on the tip side. The elastic seal ring member and the annular bush member are housed in the small diameter chamber portion of the connector body, and the notch groove portion formed in the opposing portion of the peripheral wall of the large diameter chamber is thickened toward the tip side. Elastic tongue wall having at least a part of the protruding wall is integrally provided, and the protruding wall portion is swung inward when the pipe is connected to the outside of the peripheral wall of the large diameter chamber and the protruding A small-diameter pipe connection connector configured by mounting a slide ring member that is movable in the axial direction to elastically press and connect the annular bulging wall portion near the tip of the pipe with the tip of the wall The gist of the present invention is that at least the projecting wall is outwardly outward. Of the slide ring member which is composed of an outer peripheral surface formed of an inclined surface and an inner peripheral surface formed of a flat surface or a curved surface, and which moves in the outer peripheral portion near the middle formed by the connector body in a pipe connected state. For example, the collar wall that abuts and engages with the front surface of the slide ring member at a fixed position and the hanging means of the slide ring member are integrally provided.

Since the present invention is configured as described above, a tongue-shaped wall having a protruding wall at least at a part of the notch groove portion integrally provided in the connector body, and the slide ring mounted on the outside Due to the structure with the member, at the time of connecting the pipe, at least the protruding wall of the tongue-shaped wall portion is pressed by the inner peripheral surface of the slide ring member along with the forward movement by the slide ring member, so that the tongue-shaped wall is The tip end of the protruding wall is oscillated inwardly around the root portion to press the tip end of the protruding wall against the annular bulging wall located inside the pipe side, and thus the tongue-shaped wall that functions as a claw wall. The integrated structure eliminates the need for a separate socket body and its assembly work, and at the same time simplifies the overall connector and makes it compact, so that it can be installed and installed even in tight places. It is possible to perform the connection operation in a simple,
Moreover, the slide ring member constantly maintains a stable connected state for a long period of time by the inward pressing state, and the slide ring member is moved to the rear end side to form an annular bulging wall portion and a projecting wall portion of the pipe. The pressure can be released from the tip of the pipe and the pipe can be taken out.

[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 cross-sectional view of a connector for a small diameter pipe according to the present invention, which is partially cut away in a connected state, and FIG. 1 is a state diagram before connection of FIG. 1, FIG. 3 is a plan view of the connector body alone in a partially cutaway cross section, FIG. 4 is a partially cutaway sectional view of the slide ring member alone in FIG. Figure 1
2 is a partially enlarged view showing various embodiments of the tongue-shaped wall of the present invention, (1) is a connector body, and a resin tube or a rubber hose (not shown) on the tip side is connected inside the shaft core. The stepped small diameter chamber (3 ') and the large diameter chamber (3) behind the stepped diameter chamber (3') are connected to the flow passage hole (4) of the cylindrical wall (2). Then, an elastic seal ring member (6) made of rubber or the like is provided in the small diameter chamber (3 ').
And a ring-shaped bushing member (7) for positioning at the rear part through a spacer, and a notch groove (1 ") formed in the opposite part of the peripheral wall of the large diameter chamber (3). In addition, the outer peripheral surface (1a) is an inclined surface to the outside and the inner peripheral surface (1b) is a flat surface.
The elastic tongue-shaped wall (1 ') formed as (1'a) is integrally provided. In other words, before the insertion of the pipe (P), the elastic tongue wall (1 '), that is, the inner peripheral surface (1b) of the protruding wall (1'a) is substantially flush with the large diameter chamber (3). The outer peripheral surface (1a) is a surface inclined forward and outward. In the illustrated embodiment, the pitch of the notch groove (1 ") is made large and the width of the tongue-shaped wall (1 ') is made large, but the present invention is not limited to such an embodiment, and the notch groove (1") is not limited thereto. It is also possible to reduce the pitch of) to provide a large number of narrow tongue-shaped walls (1 ′).

Reference numeral (5) is a slide ring member, which is mounted on the outside of the peripheral wall of the large diameter chamber (3) of the connector body (1) and is connected to the pipe (P) in the forward direction (arrow in FIG. 2). By moving to the outer peripheral surface to the outside of the front (1a)
Is pressed by the inner peripheral surface of the slide ring member (5), and as a result, the tongue-shaped wall (1 ') swings inward around its root, and its tip moves to the inside of the pipe side. When the slide ring member (5) is moved in the axial direction (rearward), it is connected to the annular bulging wall (P ') located under pressure.
The tongue-shaped wall is released when the pressing of the inner peripheral surface of the slide ring member (5) on the outer peripheral surface (1a), which is an inclined surface to the outside of the front, is released.
(1 ') part swings outward around the root part,
The tongue-shaped wall (1 '), that is, the tip of the protruding wall (1'a) and the annular bulging wall (P') are released from the engagement pressure, and the tongue-shaped wall (1 '), that is, the protruding wall (1') The flat surface of the inner peripheral surface (1b) of 1'a becomes almost flush with the large diameter chamber (3), and the pipe (P) can be taken out from the connector body (1).

In the above embodiment, the tongue-shaped wall (1 '), that is, the outer peripheral surface (1a) of the protruding wall (1'a) is an inclined surface to the front outside, and the inner peripheral surface (1b) is a flat surface. I showed an example of the configuration,
In the present invention, when the slide ring member (5) is moved in the axial direction (backward) to take out the pipe (P), the tongue-shaped wall (1 ′), that is, the tip of the protruding wall (1′a) is Various structures can be adopted as long as they do not interfere with the annular bulging wall (P ') portion. For example, as shown in Fig. 5, the tongue-shaped wall (1'), that is, the outer peripheral surface of the protruding wall (1'a).
(1a) may be a frontward and outward inclined surface, and the inner peripheral surface (1b) may be a curved surface.

In the above embodiment, an example in which the entire tongue-shaped wall (1 ') is formed as the projecting wall (1'a) has been described, but the present invention is not limited to such an embodiment and is formed substantially uniformly. Tongue wall (1 ')
The same effect can be achieved by projecting a part of the projection wall (1'a). For example, as described above, the annular tongue wall
(1 ') is formed to have a uniform thickness as a whole, and the protruding wall (1'a) is integrally formed with the tongue-shaped wall (1') inward in a radial direction in a T shape as shown in FIG. Or inward in a substantially U-shape in a radial direction as shown in FIG. 7, or inward from both widthwise end portions of the tongue-shaped wall (1 ′) as shown in FIG. It can also be formed. Further, the tongue-like wall (1 ') is formed to have a uniform thickness as a whole, and the protruding wall is integrally formed with the tongue-like wall (1') bent from the vicinity of its root in a flat or curved shape.
(1'a) may be projected outward in the radial direction in a substantially T shape as shown in FIG. 9, or may be projected outward in the radial direction in a substantially U shape as shown in FIG. Like the tongue wall (1 ')
It can also be formed by projecting outward from both ends in the width direction. In the embodiment shown in FIGS. 10 and 11, it is necessary to slightly shift the position of the convex hanging means (9) described later in the axial direction.

In any case, according to the present invention, the annular tongue wall
It is necessary to form the protruding wall (1'a) formed in at least a part of (1 ') toward the tip side so as to be thick,
With such a configuration, the shape of the protruding wall (1'a) does not matter. Although it is inferior in strength,
It is also possible to form the protruding wall (1'a) only in the tip portion of the tongue-shaped wall (1 ') so as to protrude inward in the radial direction as shown in FIG.

Further, (8) is a collar wall, and the connector body
Provided on the outer periphery near the middle of (1), in the connected state of the pipe (P), the slide ring member (5) is brought into abutting engagement with its front surface at a fixed position as the slide ring member (5) moves. It is engaged with the convex hanging means (9) provided on the surface.

[0013]

As described above, in the connector for connecting a small diameter pipe according to the present invention, the functional portion as the claw wall is formed integrally with the connector body (1) by the tongue-shaped wall (1 ') portion. Since the slide ring member (5) that is movable is configured to press at least the protruding wall (1'a) of the tongue-shaped wall (1 '), separate use of the socket body and its assembling work Can be made unnecessary at the same time, and at the same time, the entire connector can be made simple and compact so that the installation and connection operation can be easily performed even in a tight place, and the slide ring member (5) is used. A very useful small-diameter pipe that can maintain a stable connection for a long period of time by pressing the tongue-shaped wall (1 ') and easily take out the pipe (P). It is a connector for connection.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a connector for small-diameter pipe connection according to an embodiment of the present invention with a partial cutout in a connected state.

FIG. 2 is a state diagram before connection of FIG.

3 is a plan view of the connector main body of FIG. 1 with a partially cutaway cross section. FIG.

FIG. 4 is a partially cutaway sectional view of the slide ring member alone of FIG.

5 is a view corresponding to FIG. 1 of a connector for connecting a small diameter pipe according to another embodiment of the present invention.

FIG. 6 is a partially enlarged view showing a tongue-shaped wall according to another embodiment of the present invention, (a) is a side view and (b) is a bottom view.

FIG. 7 is a partially enlarged view showing a tongue-shaped wall according to still another embodiment of the present invention, (a) is a side view and (b) is a bottom view.

FIG. 8 is a partially enlarged view showing a tongue-shaped wall according to still another embodiment of the present invention, (a) is a side view and (b) is a bottom view.

9A and 9B are partially enlarged views showing a tongue-shaped wall according to still another embodiment of the present invention, FIG. 9A is a side view and FIG. 9B is a bottom view.

FIG. 10 is a partially enlarged view showing a tongue-shaped wall according to still another embodiment of the present invention, (a) is a side view and (b) is a bottom view.

FIG. 11 is a partially enlarged view showing a tongue-shaped wall according to still another embodiment of the present invention, (a) is a side view and (b) is a bottom view.

FIG. 12 is a partially enlarged side view showing a tongue-shaped wall according to still another embodiment of the present invention.

FIG. 13 is a partially cutaway sectional view of a conventional connector for connecting a small diameter pipe in a connected state.

[Explanation of symbols]

 1 Connector body 1'Tongue wall 1'a Projecting wall 1 "Notch groove 1a Outer peripheral surface 1b Inner peripheral surface 2 Connecting cylinder wall 3 Large diameter chamber 3'Small diameter chamber 4 Flow hole 5 Slide ring member 6 Elastic seal ring member 7 Annular bush member 8 Collar wall 9 Hanging means P Piping P ′ Annular bulging wall

Claims (3)

[Claims] 1. A stepped small-diameter chamber (3 ') and a large-diameter chamber (3), which are expanded in diameter and extend through a communication hole (4) of a tip-side connecting cylinder wall (2), are provided inside the shaft core. An elastic seal ring member (6) and an annular bush member (7) are housed inside the small-diameter chamber of the connector body (1), and a cut is made in a portion facing the peripheral wall of the large-diameter chamber (3). An elastic tongue wall (1 ') having at least a part of a protruding wall (1'a) thickened toward the tip side is integrally provided in the notch groove (1 "), and further, the large diameter chamber When the pipe (P) is connected to the outside of the peripheral wall, the protruding wall (1'a) is swung inward so that the end of the protruding wall (1'a) causes an annular expansion near the end of the pipe. A connector for connecting small diameter pipes, characterized in that it is equipped with a slide ring member (5) that is movable in the axial direction so that the outlet wall (P ') can be elastically pressed and connected. 2. At least the projecting wall (1'a) is composed of an outer peripheral surface (1a) which is an inclined surface to the front outside and an inner peripheral surface (1b) which is a flat surface or a curved surface. The connector for connecting small diameter pipes according to claim 1. 3. An outer peripheral portion of the connector body (1) near the middle thereof, which is in contact with a front surface of a slide ring member (5) which is moved in a connected state of the pipe (P) at a fixed position. Mating wall (8) and hanging means (9) for the slide ring member
3. The small-diameter pipe connecting connector according to claim 1, wherein the connector is formed integrally with.