JPH0579184U - Pipe connection structure - Google Patents

Abstract

(57) [Summary] [Purpose] Quick piping connection is possible, and the structure is simple and inexpensive. [Structure] When the pipe tip 31 is inserted into the opening 11, the ring member 2 housed in the holding groove 12 is expanded by the guide surface 41 of the socket member 4 provided on the outer periphery thereof, and the socket member 4 enters and locks. When the groove 42 is reached, the ring body 2 is reduced to its original shape again, and the inner peripheral portion thereof is fitted into the locking groove 42. As a result, the pipe 3 is prevented from coming off and is securely connected and fixed. When disconnecting the connection of the pipe 3, the opening 1
1 When both end portions 21 of the ring body 2 exposed to the outside are pulled in a direction in which they are separated from each other, the ring body 2 is expanded and deformed, and the locking groove 42 is formed.
Further, the socket member 4 becomes detachable, and the socket member 4 can be detached.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pipe connection structure, and more particularly to a pipe connection structure that is easy to connect and low cost.

[0002]

[Prior Art]

 FIG. 6 shows an example of a conventional connection structure. The figure shows a flare joint, in which a rectangular concave pipe connection opening 11 provided in the hydraulic device 1 is provided with a union 72 at the opening edge of the oil passage 14 on the bottom wall, and flares the tip opening edge of the pipe 3. The flare nut 71 mounted on the outer circumference of the pipe 3 is screwed and fixed to the threaded portion 11a on the inner circumference of the connection opening 11 in a state in which the flare nut 71 is expanded in diameter and pressed against the union 72.

[0003]

[Problems to be solved by the device]

 By the way, in the hydraulic piping of the vehicle, the position of the piping connection opening 11 provided in this is not fixed due to mounting errors of hydraulic equipment, etc., and automation is difficult, so use an impact wrench or the like to screw the flare nut. However, there is a problem that it takes time to perform the work.

On the other hand, one-touch type pipe connection structure is used in other industrial machines, aircrafts, etc., but there is a problem that the structure is complicated and expensive.

The present invention solves such a problem, and an object of the present invention is to provide a pipe connection structure that allows quick pipe connection and is simple in structure and inexpensive.

[0006]

[Means for Solving the Problems]

 The structure of the present invention will be described. A holding groove 12 is formed on the entire circumference of the inner peripheral wall of the pipe connection opening 11, and the inner peripheral portion of the holding groove 12 is protruded from the wall surface so that the holding groove 12 is formed of a spring material. The ring body 2 is provided, and the notch 13 is formed in a part of the holding groove 12 to expose both end portions 21 and 22 of the ring body 2 to the outside of the pipe connection opening 11. On the other hand, the tip of the pipe 3 is formed. A socket member 4 having an outer diameter substantially equal to the inner diameter of the pipe connecting opening 11 is provided on the outer periphery of the pipe 31, and a tapered guide surface 41 is formed on the outer periphery of the socket member 4 so as to reduce its diameter in the distal direction. On the outer periphery of the base end of the socket member 4 following the guide surface 41, a locking groove 42 having substantially the same width as that of the ring body 2 and for receiving the inner peripheral portion thereof is formed.

[0007]

[Action]

 In the pipe connection structure having the above-mentioned configuration, when the pipe tip 31 is inserted into the opening 11, the ring-shaped body 2 is expanded by the tapered guide surface 41 of the socket member 4 provided on the outer periphery, and the socket member 4 enters this. When the locking groove 42 is reached, the ring body 2 is reduced to its original shape again, and the inner peripheral portion thereof is fitted into the locking groove 42. As a result, the pipe 3 is prevented from being pulled out and is securely connected and fixed.

When the connection of the pipe 3 is released, when the both ends 21 and 22 of the ring body 2 exposed to the outside of the opening 11 are pulled in a direction in which they are separated from each other, the ring body 2 is expanded and deformed, and the locking groove. 42, and the socket member 4 is detached.

[0009]

【Example】

 In FIG. 1, the end portion of the oil flow path 14 of the hydraulic device 1 is expanded outwardly in a stepwise manner to form a pipe connection opening 11, and the tubular socket member 4 is fitted into the opening 11. .. The socket member 4 is liquid-tightly fixed to the outer circumference of the tip of the pipe 3, and a substantially circular flange body 6 is provided on the end surface of the socket member 4. The outer diameter of the socket member 4 is substantially equal to the inner diameter of the opening 11, and the O-ring 5 arranged on the outer circumference of the tip portion thereof is in contact with the inner circumference of the opening 11 to maintain liquid tightness.

The outer periphery of the intermediate portion of the socket member 4 is a tapered guide surface 41 that gradually decreases in diameter in the distal direction, and a locking groove 42 is formed on the entire outer periphery of the base end portion following the guide surface 41. It is formed and the inner peripheral portion of the ring body 2 is fitted therein. The ring body 2 is made of a spring material and has a truncated circular shape whose lower end on the circumference is open. Both ends are bent in a direction perpendicular to the circular surface of the ring body 2, and the circular surface has an opening 11. It is fitted and stored in a holding groove 12 formed on the entire circumference of the inner peripheral wall of the.

The lower end of the holding groove 12 is cut out and communicates with the outside of the opening 11. The notches 13 are located at both ends 21 and 22 of the ring body 2 (FIG. 2), and are bent outside the opening 11. It stands out. The flange body 6 provided in contact with the end surface of the socket member 4 has a circular shape along the outer edge of the opening 11, and the upper end portion thereof serves as a detent protrusion 61 that projects outward in the radial direction. It fits in a recess 15 of the same shape on the edge.

In the above connection structure, when the pipe 3 is not connected (FIG. 3), the inner peripheral portion of the ring body 2 housed in the holding groove 12 is larger than the inner peripheral wall of the pipe connecting opening 11. It is protruding. When the socket member 4 of the pipe tip 31 is pushed into the opening 11 (FIG. 4), the guide surface 41 of the socket member 4 abuts against the inner circumference of the ring body 2 and pushes and expands it.

When the flange member 6 is in contact with the outer edge of the opening 11 and the socket member 4 is pushed in until the convex portion 61 fits into the recess 15, the ring member 2 is reduced to its original diameter as shown in FIG. The inner peripheral portion is fitted into the locking groove 42 which is deformed and reaches the inside thereof. As a result, the socket member 4 is positioned and the pipe 2 is securely prevented from coming off. In this case, if each cross section of the inner peripheral portion of the ring body 2 and the engaging groove 42 is formed in a taper shape in which the width becomes smaller inward, there is no backlash in the pipe axis direction. Further, the convex portion 61 and the concave portion 15 prevent the pipe 3 from rotating.

In order to cancel the connection, if both ends 21 and 22 of the ring body 2 projecting outside the opening 11 are pulled in a direction in which they are separated from each other (left and right direction in FIG. 2), the ring body 2 is expanded and deformed. By being pressed, the socket member 4 is released from the locking groove 42, and the socket member 4 can be pulled out.

In the above connection structure, the ring body 2 and the flange body 6 can be easily punched, and the socket member 4 can be easily manufactured by forging or cutting, and the number of parts is small.

If the socket member 4 is formed into an L-shaped tubular shape as shown in FIG. 5, the pipe 3 can be connected in a direction orthogonal to the oil flow path 14.

[0017]

[Effect of the device]

 As described above, according to the pipe connection structure of the present invention, the pipes can be connected by one-touch with a simple and inexpensive structure, and can be suitably used for oil pipes of vehicles.

[Brief description of drawings]

1 is an overall cross-sectional view of a pipe connection structure showing an embodiment of the present invention and is a cross-sectional view taken along the line I-I of FIG.

FIG. 2 is a partial cross-sectional front view of a pipe connection structure.

FIG. 3 is an overall cross-sectional view before pipe connection.

FIG. 4 is an overall cross-sectional view in the middle of pipe connection.

FIG. 5 is an overall sectional view of a pipe connection structure showing another embodiment of the present invention.

FIG. 6 is an overall cross-sectional view showing a conventional structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hydraulic equipment 11 Piping connection opening 12 Holding groove 13 Notch 2 Ring bodies 21, 22 Both ends 3 Piping 31 Tip 4 Socket member 41 Guide surface 42 Locking groove

Claims (1)

[Scope of utility model registration request] 1. A holding groove is formed on the entire circumference of an inner peripheral wall of a pipe connection opening, and a ring-shaped circular body made of a spring material is provided in the holding groove so that the inner peripheral portion projects from a wall surface. A notch is formed in a part of the holding groove to expose both ends of the ring body to the outside of the opening.On the other hand, on the outer periphery of the tip of the pipe, a socket member having an outer diameter substantially equal to the inner diameter of the pipe connection opening is formed. The socket member is provided with a tapered guide surface on the outer periphery of which the diameter is reduced in the front end direction, and the base end outer periphery of the socket member following the guide surface is of substantially the same width as the ring body and the inner peripheral portion thereof. A pipe connection structure characterized in that a locking groove for receiving is formed.