JPH0355035Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The invention is generally applicable to automobiles, various machines,
This invention relates to an improvement in the connection structure between a relatively thin hose with a thickness and outer diameter of about 20 m/m or less and a small diameter metal pipe that is installed as a supply path for oil and air in equipment, etc.

[Prior Art] Conventionally, as shown in FIG. 3, for example, this type of connection structure has a communication hole 24 in the shaft core and a cylindrical wall 23 connected to a hose protruding from one end thereof. A conical seat 25 is provided at the bottom of the connection screw hole 22 with an enlarged diameter on the other end side, and the seat of the joint body 21 has a conical seat 25.
The connection was constructed by abutting a connecting end made of a flare or the like provided on the metal pipe P' side, and pinching the flared part by tightening the nut 26 onto the wall surface of the connecting screw hole 22. .

[Problems to be solved by the invention] However, in such a conventional connection structure, a large amount of pressing force is required due to the surface contact at the seat portion 25, and the metal tube
Due to variations in the various bending shapes applied to the P' side, uneven contact was produced on the mutual contact surfaces, and the structure did not have the function of mutual centering during connection. Furthermore, due to the above-mentioned large pressing force and excessive tightening at the time of one-sided contact, the thin wall deformation and twisting caused by the pinching pressure at the flare part lead to deterioration of mechanical strength, and the engine, machine, and equipment may be damaged during installation. Combined with these vibrations, this often induces cracks and damage near the neck of the flare part, resulting in leaks.
This has caused problems such as making the screw tightening work troublesome and making it difficult to connect in a narrow space due to the use of a connecting tool.

In order to extremely effectively solve the above-mentioned conventional problems, the present invention has been developed to provide a connection in an annular recessed groove provided around the circulation hole of the inner enlarged diameter hole of the connection wall whose diameter is enlarged on the other end of the joint body. An elastic seal ring having a V-shaped groove surface in the direction is inserted, a cylindrical body communicating with the flow hole is protruded from the inner enlarged diameter hole side, and the vicinity of the end of the metal pipe is fitted and inserted into the cylindrical body. At the same time, with the distal end peripheral edge of the metal tube abuttingly engaged with the V-shaped groove surface of the elastic seal ring, the joint body and the metal tube are pressed by elastic hooking means in the mutual axial direction. By configuring the connection so that the contact surface pressure on the V-shaped groove surface is sufficiently increased with a relatively small pressing force, and furthermore, it is easy to fit the metal pipe side into the cylindrical body. Therefore, it is equipped with an automatic centering function, and the connection work can be performed extremely easily and quickly by simply pressing the insertion at the time of connection. The object of the present invention is to propose a connection structure that eliminates the concern of deterioration in the strength of the connector, and that allows connection in a narrow space to be easily performed without the need for a connection tool.

[Means for solving the problem] The present invention has a communication hole penetrated through the shaft core, a cylindrical wall connecting to the hose protruding from one end, and a socket-like connection with an enlarged diameter at the other end. An annular groove is provided in the inner enlarged diameter hole of the connection wall of the joint body having a wall, located around the communication hole communicating with the enlarged diameter hole, and a V-shaped groove is provided in the groove in the connection direction. An elastic seal ring having a surface is inserted, a cylindrical body communicating with the flow hole is protruded from the enlarged diameter hole side, the vicinity of the end of the metal tube is fitted into the cylindrical body, and the metal tube is The joint body and the metal tube are connected by pressing the joint body and the metal pipe in the mutual axial direction by a resilient hooking means while the distal end peripheral edge of the joint body is in abutting engagement with the V-shaped groove surface of the elastic seal ring. The gist is a connection structure between a hose and a metal pipe, and the cylindrical body is constructed as a separate structure coaxially fitted and fixed in a flow hole.

[Example] Hereinafter, embodiments of the present invention will be described based on the drawings. Fig. 1 is a plan view showing a connection structure between a hose and a metal pipe of the present invention, and Fig. 2 is a part of Fig. 1. It is a vertical cross-sectional view with a notch, and 1 is a communication hole 4 in the shaft core.
A cylindrical wall 3 is installed through the hose and connected to the hose at one end thereof.
It is a joint body having a socket-shaped connecting wall 2 with an enlarged diameter on the other end and a socket-shaped connecting wall 2 protruding from the connecting wall. An annular groove is provided in the groove, and an elastic seal ring 6 made of a rubber material or the like having a V-shaped groove surface 7 in the connection direction is inserted into the groove, and a flow hole is formed on the enlarged diameter hole 2' side. Joint body 1 coaxially communicated with 4
A cylindrical body 8, which may be the same body as or a separate body, is provided protrudingly. Then, the vicinity of the end of the metal tube P is fitted into the cylindrical body 8 portion, and the metal tube is inserted into the cylindrical body 8 with the distal end peripheral portion of the metal tube abutted and engaged with the V-shaped groove surface 7 portion of the elastic seal ring 6. The flange wall 9 provided on the P side is elastically pressed by a claw wall 10 formed of a plurality of tongues provided on the end side of the connecting wall 2 of the joint body 1 with an enlarged diameter, so that it can be attached and detached. It is composed of:

[Function] Since the present invention is configured as described above, when connecting, the vicinity of the end of the metal pipe P is simply fitted into the cylindrical body 8 that protrudes into the inner enlarged diameter hole 2' of the connection wall 2. At the same time, with the distal end edge of the metal tube abutting and engaging with the V-shaped groove surface 7 of the elastic seal ring 6, the joint body 1 and the metal tube P are elastically moved in the mutual axial direction. The connection is made by pressing with the hooking means.

[Effects of the invention] As explained above, the connection structure between the hose and the metal pipe according to the invention is such that when the metal pipe P is fitted and inserted into the 8 parts of the cylindrical body, the peripheral edge of the distal end of the metal pipe is elastically sealed. Because it abuts and engages with the V-shaped groove surface 7 of the ring 6 and is hooked in a resilient manner, it is configured to be able to be hooked and detached freely.
Due to the structure of the V-shaped groove surface 7 formed by the elastic seal ring 6, sufficient contact surface pressure can be obtained with a relatively small pressing force, and furthermore, the end of the metal pipe P to the cylindrical body 8 can be By automatically aligning each other by fitting and inserting the metal tubes in the vicinity, it is possible to completely eliminate the problem of uneven contact on the abutment surface caused by variations in the bending shape of the metal tube P side, and also to Connection can be made extremely easily and quickly by simply pressing the metal pipe P into the tip, and there is no need to worry about deterioration of mechanical strength due to connection at the tip of the metal pipe P. Furthermore, connection work can be performed in narrow spaces. This is an extremely useful connection structure between a hose and a metal pipe, as it allows for easy connection without the need for additional tools.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a connection structure between a hose and a metal pipe showing an embodiment of the present invention, and Fig. 2 is a plan view of a connection structure between a hose and a metal pipe, and Fig. 2 is a plan view of a connection structure between a hose and a metal pipe.
A partially cutaway cross-sectional view of a line, and FIG. 3 is a partially cutaway vertical cross-sectional view of a conventional example. 1... Joint body, 2... Connection wall, 2'... Expanded diameter hole, 3
... Connecting cylindrical wall, 4... Distribution hole, 5... Annular groove, 6...
Elastic seal ring, 7...V-shaped groove surface, 8...cylindrical body,
P...Metal pipe.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A socket-shaped connection wall 2 with a flow hole 4 penetrating through the shaft core, a cylindrical wall 3 for connecting with a hose protruding from one end, and an enlarged diameter at the other end. A joint body 1 having
An annular groove 5 is provided in the inner enlarged diameter hole 2' portion of the connecting wall, and is located around the communication hole 4 communicating with the enlarged diameter hole, and the groove has a V-shaped groove surface in the connection direction. 7, a cylindrical body 8 communicating with the communication hole 4 is protruded from the enlarged diameter hole 2' side, and the vicinity of the end of the metal pipe P is fitted into the cylindrical body. At the same time, the distal end peripheral edge of the metal tube is inserted into the V-shaped groove surface 7 of the elastic seal ring 6.
A hose and a metal pipe characterized in that the joint body 1 and the metal pipe P are connected by pressing the joint body 1 and the metal pipe P in the mutual axial direction by elastic hooking means in a state of abutting and engaging with the parts. Connection structure. 2 Utility Model Registration Scope of Claim 1 The connection structure between a hose and a metal pipe, characterized in that the cylindrical body 8 is constructed as a separate structure coaxially fitted and fixed in four parts of the flow hole.