JPH028592A - Pipe connection device - Google Patents

Abstract

PURPOSE:To improve airtightness by forming a groove having a conical face narrowed toward a center around the internal surface of a pipe joint proper and fitting a bellows type packing to the groove. CONSTITUTION:A groove 10 having a conical surface 9 narrowed toward a center is formed around an internal surface between grooves 8 and 4 coupled with the stopper 7 of a joint proper 1. Furthermore, the groove 10 is fitted with a bellows type packing 11 having extension pieces 11b and 11c right and left, and a contact surface (a) on another extension piece 11b for contact with a pipe P. According to the aforesaid construction, when the pipe P is inserted up to a stopper 7, the bellows type packing 11 turns within the groove 10, thereby pressing the tip surface of the extension pieces 11b and 11c for close contact with the external surface of the pipe P and the conical surface of the groove 10. As a result, enough air-tightness can be displayed against internal and external pressure.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a pipe connecting device that allows pipes to be connected simply by inserting the pipes through openings at both ends of a joint body.

[Prior art and problems to be solved by the invention] Conventionally,
There are various types of connections for pipes such as piping. For example, a pipe connecting device utilizing the correlation between a tapered surface and a spherical body and utilizing this in a joint is disclosed in Japanese Patent Publication No. 45-5305, Japanese Patent Publication No. 49-10013, etc., and is widely used. This device rotates a nut to tighten the pipe, preventing the pipe from being pulled out and maintaining airtightness. 5.Since the tightening method is based on a method, the number of rotations of the nut is high, which is often inconvenient in small work sites. Therefore, users have been demanding simplicity and low cost.

[Means for solving problems]

The present invention was devised in order to solve this problem in view of the above-mentioned circumstances, namely, a groove having a conical surface that widens as it goes away from the insertion port on the inside of the insertion port at both ends, and a stopper in the center. a groove into which the tube is fitted, and the groove having a conical surface is equipped with a plurality of rolling spheres for the purpose of preventing the tube inserted from the insertion port from coming off due to the correlation between the conical surface and the spheres. A stopper is fitted into the stopper groove, and the main body is further provided with a groove having a conical surface narrowing toward the center on the inner surface between the stopper groove and the groove having the conical surface. In this groove, a curved surface that can roll at the center is formed with a displacement thickness, and on the left and right sides there are overhanging pieces that become thinner toward the tip. This pipe connection device features a bellows-type packing that is molded with a contact surface for connecting the terminals.It is a so-called one-touch method that allows you to easily connect the pipe by simply inserting the pipe from the openings at both ends of the joint body. It is designed to be able to be joined, and is provided for the purpose of improving work efficiency, simplifying the structure, and making it inexpensive.

〔Example〕

Embodiments of the pipe connecting device according to the present invention will be described in detail below with reference to the accompanying drawings.

In FIG. 1, reference numeral 1 denotes a cylindrical joint body, and a groove 4 having a conical surface 3 that widens as it goes away from the insertion port 2 at an arbitrary angle is provided on the inner wall circumference of both ends of the body 1 on the insertion side, In this groove 4, a large number of long holes 5 are provided in the width direction at appropriate intervals, and spheres 5a are rotatably arranged in these holes.
A holding member 6 biased by a spring 5b is interposed on the spherical body 5a, and a groove 8 into which a stopper 7 is fitted is provided around the approximate center of the main body 1.

The holding member 6 may be a spring shown in FIG. 1 or a bellows-type holding member 6a that can be expanded and contracted as shown in FIG.
The inner diameter of the array a is smaller than the outer diameter of the connecting tube P, and when the tube P is inserted, the end of the tube P follows the arrayed sphere 5a toward the center of the main body 1 and becomes larger in diameter. The sphere is inserted along the conical surface 3, which facilitates the insertion of the tube P, and the sphere is always pushed toward the opening of the main body 1 by the restoring action of a spring or bellows type spring, so that the conical surface 3 and the outer peripheral surface of the tube P are inserted. The structure is such that the pipe P is prevented from being pulled out by reaching the desired state between the pipes.

Further, between the groove 8 of the main body 1 in which the stopper 7 is fitted and the groove 4, a groove 10 having a conical surface 9 narrowed toward the center is provided on the inner surface. A Perot type packing 11 described later is arranged.

As shown in FIG. 2, the tongue-shaped packing 11 has a curved central section in cross section so as to be rotatable and has a variable wall thickness 11a, and on the left and right sides there are projecting pieces 11b that become thinner toward the tip.
A contact surface a is provided on one side of the overhanging piece 11b with which the end of the pipe P to be inserted contacts, and when the pipe P is inserted, it is pushed by the contact surface a and the tongue-shaped packing 11 is formed. is pushed toward the center of the main body 1 while rotating along the conical surface 9, and the tip of the overhanging piece 11b is inserted into the conical surface 9 of the main body 1.
The tip of the other projecting piece 11c is in close contact with the outer circumferential surface of the pipe P to provide airtightness.

[For production]

As is clear from the above configuration, in the present invention, the pipe P to be connected is inserted from the left and right ends of the joint body 1 to the position of the center stopper 7. In this case, in the groove 4 on the end side of the main body 1,
A holding member 6 having a sphere 5a is interposed therebetween, one end of which is received by the side wall 12 of the groove 4, and the other end of which is located in the middle of the conical surface 3. Therefore, the inner diameter of the sphere 5a disposed on the holding member 6 within the groove 4 is smaller than the outer diameter of the tube P. Therefore, when inserting the tube P, temporary resistance is generated and the sphere 5a moves, but since the first sphere 5a maintains elasticity by a spring or a bellows type spring, by applying a slight force, the tube P will move the sphere 5 to the conical surface. The tube P can be easily inserted by moving it in the direction of the enlarged portion of No. 3 and pushing it in.

When the tube P is inserted in this manner, the spherical body 5a tries to return to its original position by the action of the spring, and is always in close contact with the tube P, and is always in a state of engagement between the conical surface 3 and the tube P. Also, when pushing the pipe P, the inner diameter of the bellows-type packing 11 is approximately the outer diameter of the pipe P, so the overhang piece 1
When the end of the pipe P comes into contact with the contact surface a provided in the main body 1b and is pushed in, the curved surface of the thick part 11a at the center of the tongue-shaped packing 11 rotates toward the center of the main body 1 and presses against the conical surface 9. The adhesion is increased in proportion to the pushing force of the tube P, and the tip end surface of the overhanging piece 11b of the tongue-shaped packing 11 is attached to the conical surface 9 of the main body 1, and the tip end surface of the other overhanging piece 11c is The overhanging piece 11b is in close contact with the outer peripheral surface of the pipe P, and the overhanging piece 11b is
c can exhibit sufficient airtightness against external pressure. In other words, the connection can be made simply by inserting the pipe P into the main body 1,
This makes it possible to sufficiently prevent the pipe from being pulled out and provide airtightness.

〔effect〕

As described above, the present invention has a cylindrical body with a
A groove having a conical surface that widens as it goes away from the insertion port, and a groove in the center for fitting the stopper are provided around the groove to fit the stopper, and the groove having the conical surface has a conical surface and a spherical A holding member equipped with a plurality of rolling balls is interposed to prevent the tube inserted from the insertion port from coming off,
Further, a groove having a conical surface narrowed toward the center is provided on the inner surface between the stopper groove and the groove having the conical surface, and a curved surface that can roll in the center part is provided in this groove with a displacement thickness. In addition to molding, overhang pieces are provided on the left and right sides that become thinner toward the tips, and one of the overhang pieces is provided with a contact surface for contacting the end of the tube to be inserted, and a molded bellows-type packing is inserted therein. This is a pipe connecting device characterized by the following: When the pipes to be connected are inserted from both ends of the joint body up to the center stopper, the ends of the pipes are inserted by pushing open the spheres arranged on the holding member, and the tongue-type packing comes into contact with the pipes. By pushing the surface and further inserting, the bellows-type packing rotates on the conical surface provided in the groove, pressing the tip of one overhang into the conical surface and the tip of the other overhang against the outer circumferential surface of the tube. It fits tightly and can exhibit sufficient airtightness against internal and external pressure. In addition, when a tube is inserted into the main body, the sphere placed on the holding member is located between the conical surface and the tube due to the restoring action of the elastic body, and bites into the outer periphery of the tube to prevent it from being pulled out, so all you have to do is insert the tube. Since the pipes can be connected with each other and has the potential to automatically exhibit the ability to prevent pipes from being pulled out and the airtightness, the construction progresses quickly and is therefore very economically advantageous.

[Brief explanation of the drawing]

The drawings show an embodiment of the pipe connecting device according to the present invention, and FIG. 1 is a partial vertical sectional side view, FIG. 2 is a vertical sectional side view showing a tongue-type packing, and FIG. The front view and FIG. 4 are sectional views showing a part of another implementation side of the holding member. 1... Joint body, 2... Insertion port, 3, 9... Conical surface, 4.8.10... Groove, 5... Long hole, 5a...
Sphere, 5b... Spring, 6, 6a... Holding member, 7... Stopper, 11... tongue type packing, l
la... thick curved surface part, llb, llc... overhanging piece,
a...Contact surface, P...Pipe

Claims (1)

[Claims] A groove having a conical surface that widens as it goes away from the insertion port is provided on the inside of the insertion port at both ends of the cylindrical body, and a groove for fitting the stopper is provided in the center part, and the stopper is fitted, and the conical surface is fitted. A holding member is interposed in the groove having a plurality of rolling spheres for the purpose of preventing the tube inserted from the insertion port from coming off due to the correlation between the conical surface and the sphere, and the stopper groove and the conical surface are further interposed. A groove with a conical surface that narrows toward the center is provided on the inner surface between the grooves, and a curved surface that can roll in the center is molded into the groove with a displacement wall thickness. A pipe connecting device characterized by having an overhanging piece that becomes thinner in the opposite direction, and interposing a molded bellows-type packing with a contact surface for contacting the end of the inserted pipe on one side of the overhang.