JP3219285B2 - Connector for small-diameter piping connection - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention is generally applied to a motor vehicle or various machines, devices, etc., as a supply path for lubrication and air supply, and is used for a pipe which is frequently used and has a relatively small diameter of about 20 m / m or less. The present invention relates to an improvement in the structure of a connector for connecting a metal tube or a resin tube (hereinafter simply referred to as piping).

[0002]

2. Description of the Related Art Conventionally, as this type of connection connector, as shown in FIG. 10, for example, as shown in FIG. A socket body (22) protruding from a pair of elastic claw walls (23), which is located at the front part in the insertion direction and is inclined forward in the peripheral wall part of the hole, is attached to the annular peripheral wall (23 ') part on the rear end side. in a state where the stepped portion (24) and fastening provided, the Tsumekabe annular swelling wall of the pipe incorporated by _{(23) (P o) (} P o ') unit as allowed to connect engage the Was composed.

[0003]

However, in such a conventional technique, in the socket body (22), the annular shape is formed by the snap function of the claw wall (23) in the connected state of the pipe (P _o ). Due to the structure that engages the bulging wall (P _o ′), the mutual engagement is generally uncertain, and the claw wall for a long time
When a tensile force is applied to the pipe (Po) in the installed state due to fatigue in the part (23), the tip of the claw wall expands, causing engagement and disengagement, making the connection unstable and causing leakage. Tended to have the problem of inducing

The present invention has been made in view of the above-mentioned problems of the prior art, and ensures engagement with the bulging wall for a long period of time. An object of the present invention is to propose a connector for connecting a small-diameter pipe which can stably connect without worrying about engagement and disengagement.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a small-diameter chamber and a stepped-diameter expanding chamber connected to a flow hole of a connecting cylinder wall at the distal end inside a shaft core and expanding the shaft. A notch window is provided opposite to the peripheral wall of the diameter chamber, and a seal ring member and a bush member are provided behind the connector ring on the small diameter chamber side of the connector body having a rear end peripheral wall portion as a hanging wall. In the enlarged diameter chamber, the rear end is supported by a separate socket body having a pair of claw walls protruding from the hanging wall and the insertion direction so as to be opposed to each other. A connector which is configured to engage with and connect to an annular bulging wall provided near a connecting end of the pipe incorporated into the connector body by the claw wall. An annular cylindrical wall attached to the rear side of the outer peripheral surface of the main body; A rear end protruding from a wall portion at a position substantially at right angles to the axial direction inside a front end portion connected to an elastic arm extending circumferentially in a circumferential direction by a slit while leaving a ring wall at at least one end. It is formed by an integral structure having a pair of square block-shaped claw walls forming a tapered surface with an open portion, and in a connection state in which the claw wall is engaged with the bulging wall portion of the pipe, the socket body has The present invention provides a connector for connecting a small-diameter pipe, which is provided with means for preventing expansion of a claw wall, wherein the expansion prevention means is provided at a rear end of a socket body with a hanging wall of the notch window. The engaging surface of the socket body is formed as an inclined surface that opens toward the tip, and in the connection state where the claw wall of the socket body engages with the bulging wall of the pipe, the outer periphery of the socket body Move in the axial direction on the surface, or on the circumference A cylindrical holding member made of an elastic material attached so as to rotate in the direction of rotation, and further in the connection state in which the claw wall of the socket body engages with the bulging wall of the pipe. On the outer peripheral surface of the elastic member is formed of a cylindrical pressing member of an elastic material which has a projection engaged with the slit portion and is attached so as to rotate only in the circumferential direction,
Further, in the above-mentioned connection state in which the claw wall of the socket body is engaged with the bulging wall of the pipe, the socket body is provided on the side wall surface of the claw wall portion and is turned in the circumferential direction of the socket body. It is composed of a circumferential projection that is engaged with the inner peripheral surface of the connector body by movement.

[0006]

Since the present invention is constructed as described above, a mutual engaging surface between the notch window and the support wall is formed as an inclined surface opening toward the front end, or a shaft center direction. , Or the attachment structure of the holding tool that rotates only in the circumferential direction by engaging the projection with the slit portion, and the rotation in the circumferential direction. In a connection state in which the claw wall of the socket body is engaged with the bulging wall of the pipe by the claw wall of the socket body by the spread prevention means having a claw wall structure provided with a circumferential projection supported by movement, In combination with the rectangular block shape, it can be prevented from spreading on the claw wall for a long period of time, and can be securely engaged and held. Even when tensile force is applied, there is no fear of disengagement, no leakage and reliable and stable And thus to maintain the connection.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a partially cutaway plan view of a connector for connecting a small-diameter pipe according to the present invention, and FIG. Longitudinal section,
3 is a sectional view taken along the line AA of FIG. 1, FIG. 4 is a perspective view of the socket body alone, FIG. 5 is a longitudinal sectional view of another embodiment, FIG. 6a is a longitudinal sectional view of another embodiment, and FIG. FIGS. 7a and 8a are perspective views of the holding member used for 6a, and FIGS. 7a and 8a are longitudinal sectional views each showing a main part of the present invention according to still another embodiment, partially cut away, and are B 'in FIGS. 7b and 8b. -B ', C'-C' sectional view,
7b and 8b are BB, CC of FIGS. 7a and 8a.
9a and 9b are cross-sectional views of FIG.
(1) is a connector main body, which extends inside the shaft core along a flow hole (4) of a connecting cylinder wall (2) such as a resin tube or a rubber hose (not shown) on the tip side. A small-diameter chamber (3 ') with a diameter and a stepped large-diameter chamber (3)
In addition, a notch window (9) is provided opposite to the peripheral wall formed by the enlarged diameter chamber, and the rear peripheral wall is formed as a hanging wall (1 '). A plurality of elastic seal ring members (6) made of rubber or the like and a stepped bush member (6 ') are provided behind the small-diameter chamber (3') via spacers. (8)
Is a socket body made of an elastic material such as resin which is attached to the rear side of the connector body (1), and has an annular cylindrical wall (7) to be attached and a ring at least at one end of the cylindrical wall. wall
The peripheral wall is formed into an arm (7 ') extending in the circumferential direction by the slit (12) except for (7 "), and protrudes inside the distal end portion of the arm at a position substantially perpendicular to the axis direction. The connector body has a pair of rectangular block-shaped claw walls (5) forming a tapered surface (5 ') opening rearward at the rear end of the connector body. When the socket body (8) attached to (1) is engaged, the front side of the claw wall (5) connected to the arm (7 ') located at the notch window (9) is connected to the pipe ( P) as a pressing surface (10) for the annular bulging wall (P ') provided near the connection end, and a support wall (1') for the notch window (9) at the other rear end surface. ) Are formed as inclined surfaces (11) (FIG. 2) that open toward the front end, and are engaged under the connected state of the pipe (P) to form a claw wall.
(5) to prevent the spread. As shown in FIG. 5, it is not always necessary that the rear end face of the claw wall (5) is engaged with the entire end face of the hanging wall (1 ') as shown in FIG. Further, as another embodiment, a projection (5 ") provided on the outer peripheral surface of the claw wall (5) by moving in the axial direction (FIG. 6) is formed on the outer peripheral surface of the socket body (8). An elastic material which is hung on a window (14) provided to prevent the claw wall from spreading outward, and which, after being hung, prevents movement in the relative circumferential direction and axial direction with the socket body. It can also be constituted by attaching a cylindrical holding member (13) made of a ridge-shaped (straight) projection (13 ') extending in the axial direction on the inner peripheral surface of the holding member (13). (FIG. 7) or, for example, a columnar projection (13 ″) (FIG. 8) is provided and the projection is formed by the slit (1).
The socket body (8) is configured so as to be engaged with the part 2) and rotate only in the circumferential direction, and furthermore, the socket body (8) is attached to the side wall surface of the claw wall (5) of the socket body (8). 9a to 9b, a circumferential protruding portion (8 ') is provided which is engaged with the inner peripheral surface of the connector body (1) by being rotated in the circumferential direction.
(5) It has a structure to prevent the spread.

[0008]

As described above, the connector for connecting a small-diameter pipe according to the present invention has a structure in which the inclined surface (11) forms an interlocking structure or an attachment structure using the holding member (13), and further includes a lock groove ( 8 ') provided by means of the nail wall (5) structure and the like to prevent the nail wall (5) from spreading, together with the rectangular block-like shape formed by the nail wall (5) for a long period of time. The claw wall can be securely engaged and held, and even if a tension force is applied to the pipe (P) from the outside while the claw wall (5) is provided, there is no fear of disengagement of the claw wall (5). This is an extremely useful small-diameter pipe connection connector that can maintain a stable connection with high reliability without leakage.

[Brief description of the drawings]

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

FIG. 2 is a longitudinal sectional view of FIG.

FIG. 3 is a sectional view taken along the line AA of FIG. 1;

FIG. 4 is a perspective view of a single socket body.

FIG. 5 is a diagram corresponding to FIG. 2 of another embodiment.

FIG. 6a is a longitudinal sectional view showing a main part of the present invention according to still another embodiment, partially cut away.

FIG. 6b is a perspective view of the presser used alone in FIG. 6a.

FIG. 7A is a view corresponding to FIG.
It is sectional drawing of the B'-B 'line.

FIG. 7b is a sectional view taken along the line BB in FIG. 7a;

FIG. 8A is a view corresponding to FIG. 4 of still another embodiment, and FIG.
It is sectional drawing of the C 'line.

8b is a sectional view taken along line CC of FIG. 8a.

FIG. 9a is a view corresponding to FIG. 3 showing yet another embodiment, and showing a state before the rotation of the socket body.

9b is a view showing the state after the rotation of FIG. 9a.

FIG. 10 is a partially cutaway sectional view showing a conventional example of a small-diameter pipe connection connector in a connected state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Connector main body 1 'Hanging wall 5 Claw wall 5' Tapered surface 7 Annular cylindrical wall 7 'Elastic arm 7 "Annular wall 8 Socket body 8' Projecting part 9 Notch window 11 Inclined surface 12 Slit 13 Holder 13 ', 13 ″ Projection P piping P ′ bulging wall

Claims (5)

(57) [Claims] 1. A small-diameter chamber and a stepped large-diameter chamber connected to a flow hole of a connecting cylinder wall on the distal end side are penetrated inside a shaft core, and a notch window is provided facing a peripheral wall portion of the large-diameter chamber. A seal ring member and a bush member are provided behind the small-diameter chamber side of the connector body having a rear end peripheral wall portion as a support wall. The rear end portion is supported by a separate socket body having a pair of claw walls protruding from each other in the direction opposite to each other, and in this state, the claw wall is incorporated inside the connector main body by the claw wall under a pipe connection state. In a connector for connection configured to engage and connect to an annular bulging wall provided near a connection end of a pipe, the socket body (8) is attached to a rear side of an outer peripheral surface of the connector body (1). An annular cylindrical wall (7) to be attached, and an annular wall (7 ") at least at one end of the cylindrical wall portion. The slit (12) opens the rear end that projects substantially perpendicularly to the axial center inside the front end connected to the elastic arm (7 ′) that extends circumferentially around the peripheral wall by the slit (12). The tapered surface (5 ') and the square block-shaped pair of claw walls (5) formed by the integral structure provided with the claw wall (5) to the bulging wall (P') of the pipe (P). A connector for connecting a small-diameter pipe, wherein said connector is provided with means for preventing expansion of a claw wall of a socket body (8). 2. The expansion preventing means according to claim 1, wherein the notch window (9) at the rear end of the socket body (8) has a mutual engagement surface with the hanging wall (1 '). A connector for connecting a small-diameter pipe, wherein the connector has a slope (11) that opens toward the tip. 3. A pipe according to claim 1, wherein said expansion preventing means is formed by a claw wall (5) of said socket body (8).
(P) in the connected state engaged with the bulging wall (P '),
A small-diameter pipe comprising an elastic cylindrical retainer (13) attached to the outer peripheral surface of the socket body (8) so as to move in the axial direction or to rotate in the circumferential direction. Connector for connection. 4. A pipe according to claim 1, wherein said expansion preventing means is provided by a claw wall (5) of said socket body (8).
(P) in the connected state engaged with the bulging wall (P '),
On the outer peripheral surface of the socket body (8), there is provided a projection (13 ') or (13 ") for engaging with the slit (12), and the elastic material is attached so as to rotate only in the circumferential direction. A connector for connecting a small-diameter pipe, comprising a cylindrical presser (13). 5. The pipe according to claim 1, wherein said expansion preventing means is formed by a claw wall (5) of said socket body (8).
(P) in the connected state engaged with the bulging wall (P '),
The connector body is provided on the side wall surface of the claw wall (5) of the socket body (8), and is rotated by the socket body in the circumferential direction.
(1) A connector for connection to a small-diameter pipe, comprising a circumferentially protruding portion (8 ') supporting the inner peripheral surface of (1).