JP2535547Y2 - Connector for small-diameter piping connection - Google Patents

Description

[Detailed description of the present invention] (Industrial application field) The present invention is generally applied to automobiles or various machines and devices, etc., as a pipe diameter and thickness of 20 m /
The present invention relates to an improvement in the structure of a connector for connecting a metal pipe or a resin tube (hereinafter simply referred to as a pipe) having a relatively small diameter of about m or less.

(Prior Art) Conventionally, as this type of connector, for example,
As shown in the figure, a rear peripheral end forming a cylindrical wall connected to the communication hole (14) of the connecting tube wall (12) at the tip inside the shaft core is supported by the hanging wall (1).
As 1 '), an enlarged-diameter chamber (13) is penetrated, and a sealing ring member (16) and a bush member (17) are internally provided. An annular stepped peripheral wall (18 ') at the rear end of a socket body (18) having a plurality of claw walls (15) projecting forward at an opposing position on the distal end side is engaged with the socket body (18). In a state where it is located in an engagement hole (19) formed of a long hole formed in a cylindrical wall portion forming the enlarged diameter chamber (13) of (11), it is assembled into the enlarged diameter chamber on the pipe (Po) side. The annular bulging wall (Po ') is configured to be connected by being pressed by the respective distal ends of the claw wall (15).

(Problems to be solved by the invention) However, in such a conventional technique, the main body (1) is provided with the stepped peripheral wall (18 ') of the socket body (18).
1), and at the same time, the claw wall (15) on the socket body side is positioned in the engaging hole (19) of the cylindrical wall of the main body (11). Due to the structure, when assembling the socket body (18), the peripheral wall of the base portion (18 ″) formed by the claw wall (15) is crushed to pass through the inside of the hanging wall (11 ′) and pressed from behind. The large diameter of the socket body (18) itself is inevitable, and furthermore, the entire product is made large in diameter and elongated in the longitudinal direction by the engagement with the hanging support wall (11 ') formed by the cylindrical wall. Therefore, the arrangement in a narrow place often causes troubles, and at the same time, the pressure applied to the bulging wall (Po ') is weakened due to the length of the claw wall (15) due to these large diameters, thereby causing "spotting". There is a problem in that the connection for a long period of time becomes unstable, for example, inducing the leakage in the arrangement under the vibration state.

The present invention has been made in view of the above-mentioned problems of the prior art, and has a small diameter for the socket body and the retainer itself, and makes the entire product including the connector body compact and can be arranged in a narrow place. At the same time, a connector for a small-diameter pipe connection that can effectively exert engagement pressure by eliminating the worries of "shattering" due to the short dimension of the hook claw wall and maintain the connection more reliably over a long period of time. It is intended to do so.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a connector body having a stepped expanding chamber connected to a flow hole of a connecting cylinder wall at a distal end inside a shaft core. A seal ring member is provided in the chamber, and a cylindrical socket body in the enlarged diameter chamber, which presses the seal ring member by the distal end portion, is provided near the distal end thereof behind the cylindrical wall formed by the enlarged diameter chamber of the connector body. The rear end of the retainer, which protrudes a plurality of hook pawl walls forward and in the radial direction, is fixedly provided on the rear periphery of the socket body side, and the hook is attached to the socket body side. An outwardly expanding annular wall portion located inside the socket body provided near the connection end of the pipe inserted into the enlarged diameter chamber portion by the pawl wall is elastically pressed and connected. The gist is a connector for connecting a small-diameter pipe configured as described above. You.

(Operation) Since the present invention is configured as described above, the front end of the socket body in which the retainer is fixed to the peripheral portion in advance and assembled on the pipe side is attached to the vicinity of the rear end periphery formed by the cylindrical wall of the connector body. Then, the pipe is inserted into the socket body and connected, or the front end of the socket body constructed in the same manner as described above is placed near the rear end periphery formed by the cylindrical wall of the connector body with the pipe inserted. The socket body and the retainer can be made small in diameter because they are engaged by caulking, so that the entire product including the connector body can be made compact and can be arranged in a narrow place. At the same time, there is no fear of "striking" due to the short hanging hook pawl walls, and the engagement pressure on the bulging wall of the pipe is more effectively exerted, and the connection is reliably maintained for a long time. .

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.
FIG. 1 is a longitudinal sectional view of the connector for connecting a small-diameter pipe according to the present invention in a partially cut-away state, FIG. 2 is a rear view of the retainer alone in FIG. 1, and FIG. 3 is a front view in FIG. FIG. 4, FIG. 4 is a view corresponding to FIG. 1 showing another embodiment, FIG. 5 is a perspective view of a hook hook wall formed by a retainer, FIG. 6 is a sectional view of still another embodiment of the retainer, 7 (a) and 7 (b) are partially enlarged cross-sectional views of another embodiment of FIGS. 1 and 4, wherein (1) is a connector main body made of a metal material, and has a distal end inside a shaft core. A stepped enlarged chamber (3) is provided through a communication hole (4) of a connecting tube wall (2) with a resin tube or a rubber hose (not shown), and a rubber material is provided in the enlarged diameter chamber. A single seal ring member (6) made of an elastic material such as (FIG. 1) or a plurality of seal ring members (4
(Fig.). (5) is a cylindrical socket body made of a metal material or a resin material, which presses the seal ring member (6) by its distal end in the enlarged diameter chamber (3). The cylindrical wall (1 ') forming the diameter expansion chamber (3) of (1) is engaged by caulking near the rear end periphery.

The socket body (5) is configured such that its tip is bent inward (FIG. 1) leading to the opening wall or outward (FIG. 4) leading to the cylindrical wall. (7) is a retainer as a hanging member made of a metal spring material or a resin material or a combination thereof, and a plurality of hanging claw walls (7 ') are provided to protrude in front of the ring body, and the ring body is connected to a socket. It is fixed to the rear peripheral portion of the body (5) by caulking or casting.

The retainer is not limited to FIGS. 2 and 3,
In the case where the socket body (5) is made of a resin material, a plurality of sockets are provided on the circumference with a plurality of rear end portions of the hanging hook claws (7 ') made of a single metal material as shown in FIG. When the body (5) is formed, the socket body (5) may be formed by casting on the rear periphery thereof,
In the case where the socket body (5) is made of a metal material, the rear end of the hanging claw wall (7 '), which is also a single piece, can be fixed by caulking the rear periphery of the socket body (5). The retainer (7) can be formed by fixing the rear end portion of the hanging hook claw wall (7 ') made of a metal material with the resin material of the ring body, and can be fixed by caulking.

And a pipe (P) inserted into the inside of the expanded chamber (3).
The outwardly bulging wall (P ') provided near the connecting end of (2) is located inside the socket body (5), and is connected by being elastically pressed by the hanging claw wall (7'). Things.
It is to be noted that the tip of the hook pawl wall (7 ') of the retainer (7) may be constituted as an upright wall (8) which is erected outward (FIG. 4), or as shown in FIG. For example, a resin sleeve (9) is interposed between the circumferential surface of the cylindrical wall (1 ') and the outer circumferential surface of the pipe (P), and the tip of the socket body (5) and the seal ring member (6) are A washer (10) for stabilizing the seal ring member is provided therebetween, and a flange (9 ') is provided on the distal end side of the sleeve (9) similarly interposed as shown in FIG. With this configuration, the sleeve (9) can prevent scratches when the pipe (P) is attached to the outer peripheral surface of the pipe (P).

(Effect of the Invention) As described above, the connector for connecting a small-diameter pipe according to the present invention has the above-mentioned socket body (7) having a retainer (7) having a plurality of hook claws (7 ') projecting forward. 5), the socket body (5) and the retainer itself can be reduced in diameter because they are configured to be engaged near the rear end of the connector body (1) side. The whole can be made compact so that it can be installed in a narrow place, and at the same time, there is no worry about "spotting" due to the short hanging hook pawl wall (7 '), and the swelling of the pipe (P) This is a very useful connector for connecting a small-diameter pipe, for example, because it can more effectively exert the engaging pressure at the wall (P ') and maintain the connection reliably for a long period of time.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a small-diameter pipe connection connector according to an embodiment of the present invention in a partially cut-away state when connected, FIG. 2 is a rear view of the retainer of FIG. 1 alone, and FIG. FIG. 4 is a front view of FIG. 2, FIG. 4 is a view corresponding to FIG.
Fig. 6 is a perspective view of one retaining hook claw wall formed by the retainer, Fig. 6 is a cross-sectional view of another embodiment of the retainer, and Figs. 7 (a) and 7 (b) are other than Figs. FIG. 8 is a longitudinal sectional view of a connection connector according to a conventional example, which is partially cut away when the connection connector is in a connected state. (1) ... connector body, (1 ') ... cylindrical wall,
(2) ... connecting cylinder wall, (3) ... diameter expansion chamber, (4) ... flow hole, (5) ... socket body, (6) ... seal ring member, (7) ... retainer, (7 ′)… hanging claw wall,
(P) ... piping, (P ') ... bulging wall.

Claims (1)

(57) [Scope of request for utility model registration] 1. A large-diameter chamber portion of a connector body (1) in which a stepped large-diameter chamber (3) connected to a flow hole (4) of a connecting cylinder wall (2) on the distal end side is penetrated inside a shaft core. And a cylindrical socket body (5) in which the seal ring member (6) is provided inside and the seal ring member is pressed by a tip portion in the enlarged diameter chamber (3).
Around the front end of the cylindrical body (1 ') formed by the enlarged diameter chamber (3) of the connector body (1), and at the rear periphery of the socket body (5), A rear end portion of the retainer (7), which projects a plurality of hook claws walls (7 ') forward and in the radial direction, is fixedly provided, and the hook claws wall (7') is connected under a pipe (P) connection state. As a result, the outwardly protruding annular wall (P ') located inside the socket body (5) provided near the connection end of the pipe inserted into the enlarged diameter chamber (3) is resilient. A connector for connecting a small-diameter pipe, which is configured to be connected by being pressed in a shape.