JPS5949473B2 - pipe connection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pipe connection device, and more particularly, a core groove having a maximum depth at a point on the inner circumference of a joint body and a minimum depth at a point relative to this maximum depth; In conjunction with this, a core groove is formed that has the minimum depth at the maximum depth position and the maximum depth at the minimum depth position, and a core groove that is adapted to both oblate grooves is formed. A backing with two stripes of displacement thickness is rotatably fitted, and on the inner surface of the backing, a portion is obliquely crossed at a corresponding position connecting the center of each of the highest and lowest depth positions of both oblique grooves. Two annular protrusions are provided, and an annular thin piece that becomes thinner toward the tip is provided on one end edge of the backing, and the pipe to be connected is inserted into the joint, and the pipe is fixed in place. The present invention relates to a pipe connecting device that rotates a main body and brings pressure into contact with the minimum depth of a core groove and the thickness of a backing.

In conventional pipe connections in piping, etc., pipe connection devices that utilize the correlation between the tapered surface and the sphere and utilize this in joints are disclosed in Japanese Patent Publication No. 45-5305, Japanese Patent Publication No. 45-6374, and Japanese Patent Publication No. 45-6374. 49-10013, etc.

This connecting device is also an invention of the present applicant.

One such embodiment will therefore be described with reference to FIG.

It has a pair of cylindrical bodies S and b' each having a thread aXa' in an opposite direction on its outer periphery, and a reverse threaded nut c to be simultaneously screwed together. A conical surface dXd' that becomes smaller in diameter as it moves away, and the conical surface d
Inside d', a cylindrical holder f, which also serves as a backing, is made of an elastic body that rotatably holds a plurality of steel balls eXe arranged in a cylindrical direction, exposed on the inner and outer surfaces, on the small diameter side of the cylindrical body bXb'. Further, a cylinder g is interposed between the left and right holding bodies f1f, and a connecting pipe body is inserted from the small diameter side into the cylinders f1 and b', and after inserting h', the above-mentioned nut is inserted. Rotate the holders f and f into a cylinder g while drawing them together to form a cylinder g.
Push it into the small diameter side of the cylinder bXb' and hold the holding body fXf.
A configuration is used in which the conical surfaces are brought into pressure contact with each outer periphery of the tube hXh'.

That is, the elastic holder is brought into pressure contact with the tubular body using the inner conical surface, and the balls provided on the holder are bitten into the tubular body to prevent the tubular body from coming off.

By the way, as mentioned above, the structure of general joints originally works by rotating the nut to tighten and seal the pipe, but because it is a screw-fitting method, the number of rotations of the nut is high, making it difficult to work in confined spaces. Since there are many cases, there are many inconveniences, and for this reason, users have always been required to simplify their use and make them inexpensive.

The purpose of the present invention is to overcome such disadvantages by using a special joint to simplify the work of joining the pipe bodies, to easily perform airtight work, and to be inexpensive.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a pipe connecting device according to the present invention will be described in detail below with reference to the accompanying drawings.

Reference numeral 1 designates a 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. A retaining member 6 made of rubber or the like having an elastic and spring action is interposed, in which a large number of spheres 5 are disposed at appropriate intervals so as to be freely removable, and a groove in which a stopper T is fitted is provided approximately at the center of the main body 1. There are 8 surrounding areas.

A groove 9 between the stopper 7 and the groove 4 and closer to the groove 4
will be established.

This groove 9 has an eccentric annular groove 10 having a maximum depth a at one point and a minimum depth b at a relative point thereof, and an eccentric annular groove 10 having a maximum depth a at one point and a minimum depth b at a relative point. b', the eccentric grooves 11 having the maximum depth a' are provided side by side in contact with the position of the minimum depth b.

These two core grooves 10.11 have an eccentric groove 10.11 on the outer periphery.
11, a backing 12 with a displacement thickness is coated with a lubricant from a grease pan, and is rotatably fitted with a margin to be built in.

The backing 12 has central portions m, m' and nXn at the highest and lowest depth positions of each core groove 10.11 on the inner surface.
An annular protruding protrusion 13 is protruded corresponding to the line R, R' that connects the lines R1 and R' along the groove, and the protrusion 13 is provided so as to cross obliquely at a position M where it intersects the line R1R'. A large number of protrusions 13'' having the same height as the protruding protrusions 13 and parallel to the axis are provided at intervals.

In addition, the inner diameter of the backing 12 is slightly larger than the outer diameter of the insertion tube p, and it is thinner toward the tip at one end near the center of the main body, and the inner diameter of the tip edge is made smaller than the outer diameter of the insertion tube p. An annular thin piece 14 with a slightly smaller diameter is integrally molded so that the thin piece 14 fits and wraps around the insertion tube p.

As is clear from the above configuration, in the present invention, the insertion tube 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 of the body 1.

In this case, a holding member 6 having a sphere 5 is interposed in the groove 4 on the end side of the main body 1, and one end is received by the side wall 15 of the groove 4, and the other end is located in the middle part of the conical surface 3. are doing.

Therefore, the inner diameter between the spheres 5 disposed on the holding member 6 in 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 5
moves, but since the holding member 6 acts elastically, by applying a slight force, the tube p can move and push the sphere 5 toward the enlarged portion of the conical surface 3, and the tube p can be easily inserted.

When the tube p is inserted in this manner, the holding member 6 is restored by the spring action and comes into close contact with the tube p, and the sphere 5 is pressed against the tube p by the conical surface 3.

Further, in the core groove 9 of the main body 1, a thick part of the backing 12 is fitted in a deep part, and a thin part is fitted in a shallow part.

Therefore, the insertion tube p is easily inserted into this backing 12, and when the tube p is inserted, the outer periphery of the tube p is wrapped with the annular thin piece 14 provided at the tip of the backing 12.

In this inserted state, the pipe p and the backing 12 are wrapped in the annular thin piece 14 and are in a fixed state, so even if the main body 1 is rotated with the pipe p fixed, the backing 12 is not necessarily always together with the main body 1. Does not rotate.

Therefore, when only the main body 1 is rotated, the core groove 10.1 of the main body
Backing 1 that is wrapped around and fixed to the pipe p in 1
2 is pressed by the core groove 10.11 whose thick part becomes gradually shallower and produces a sealing effect.

That is, when the main body 1 is rotated, the thicker half of the backing 12 connecting lines R and R' exhibits a suppressed state, and the remaining half of the circumference exhibits reduced suppression.

In addition, the core grooves 10.11 arranged adjacent to each other have an average depth between the highest depth position and the lowest depth position, and this average depth is the height of the core grooves 10.11. This is the boundary between the thickness of the backing and the size of the wall.

Therefore, the diagonal position 13 of the protruding protrusion 13 is the position of the boundary, and from the point of view of sealability, the airtightness of one protrusion becomes weaker around this boundary, whereas the airtightness of the other protrusion becomes weaker. On the contrary, dejo is a starting point for trying to become stronger.

However, since the mutually protruding stripes are integrally formed, when the pipes P are connected, airtightness is achieved around the entire circumference.

In the present invention, the pipes P to be connected are inserted from both sides of the joint up to the center stopper 7, and by rotating the joint body with the pipes P fixed, the depth of the groove height and the thickness of the backing 12 fitted therein can be adjusted. Air-tightness can be easily obtained by pressing the pipe p in relation to the size of the holding member 6.
It is a joint with an original structure that allows for easy connection due to the correlation between the sphere 5 and the conical surface arranged in the pipe, and also has the effect of automatically preventing the pipe from coming off, and its structure is extremely simple. Since it is easy to handle, it increases the efficiency of the work, and it is naturally inexpensive.

[Brief explanation of the drawing]

The drawings show an embodiment of the pipe connection device according to the present invention, in which Fig. 1 is a longitudinal sectional view, Fig. 2 is a sectional view of a part of the joint body, Fig. 3 is a side view of the backing, and Fig. 4 is a side view of the backing. The figure is a front view of FIG. 3, FIG. 5 is a cross-sectional view taken along the line X--X of FIG. 4, and FIG. 6 is a partially sectional side view of the conventional pipe connecting device. 1... Joint body, 2... Insertion port, 3... Conical surface,
4... Groove, 5... Sphere, 6... Holding member, γ...
・Stopper, 8.9.10.11...Groove, 12...
・Packkin Otsu 13...Annular protruding ridge, 13'...Oblique intersection, 13''...Protruding ridge parallel to the axis, 14...
Thin section, aXa'...maximum depth, b, b'...minimum depth, p...tube.

Claims (1)

[Claims] 1 Inside the insertion opening at both ends, there is a joint body with a groove having a conical surface that widens as it goes away from the insertion opening, and a groove in the center for fitting the stopper, and the conical surface is connected to the groove on the right. is equipped with a holding member having a plurality of transfer spheres arranged therein for the purpose of preventing the connection tube inserted from the insertion port from coming off due to the correlation between the conical surface and the sphere, and further has a stopper and the conical surface on the main body. On the inner surface between the grooves, there is a core groove with a maximum depth at one point on the circumference and a minimum depth at this relative point, and a core groove that moves in conjunction with the core groove at the above-mentioned height and depth position. On the contrary, the core grooves are formed so that the depth is the highest at the lowest depth position and the lowest depth position, and these two oblate grooves have two stripes of displacement thickness on the outer periphery that are adapted to the front oblate grooves. The backing is rotatably fitted, and furthermore, on the inner surface of the backing, there are two stripes that partially intersect diagonally at corresponding positions connecting the respective centers of the highest depth position and the lowest depth position of the core groove. An annular protruding protrusion, and a plurality of protruding protrusions parallel to the axis and perpendicular to the inserted pipe are provided at intervals outside the annular protruding protrusion, and one end edge of the backing is provided with a plurality of protruding protrusions at intervals. A pipe connecting device that is made thinner toward the tip and is integrally provided with an annular thin piece that can wrap the connecting pipe.