JPS585183Y2 - pipe fittings - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a pipe joint equipped with a mechanism to prevent pipes from being pulled out.

In a pipe joint in which a tube socket is inserted into a pipe socket via an annular elastic body, the tube socket can be easily removed as is.

Therefore, various methods have been tried to prevent the tube insertion port from coming off.

Among these methods, one that is easy to connect is to provide grooves on the inner circumferential wall of the tube socket and the outer circumferential wall of the tube socket, and to attach a split ring to either of the grooves. A method is known in which the tube is prevented from coming off by inserting the insertion port into the tube socket so that the two concave grooves face each other and engaging the split-opening ring with the other concave grooves as well.

In this method, a groove for engaging the split ring is bored in the outer peripheral wall of the pipe insertion port, so the strength of synthetic resin pipes is significantly reduced and this part is easily damaged, and processing work is also difficult. He was also troublesome.

In order to prevent the strength of the tube insertion port from decreasing due to the drilling of grooves,
0-129916 proposes forming a thick part with an annular groove on the outer circumferential surface of the tube insertion port, but in this case, it is cumbersome to form a thick part, and it is difficult to form a thick part in this case. In line with this trend, the diameter of the pipe socket must necessarily be increased.

This idea was made in view of the above points, and its gist is that the tube inlet is inserted into the tube inlet through the tube that is attached to the inner peripheral surface of the open end of the tube outlet and forms a seal. In the connected pipe joint, a continuous concave portion is provided along the circumferential direction on the inner circumferential surface of the pipe socket on the back side of the annular elastic body, leaving a part of the circumferential wall, and the concave portion is provided with a concave portion that is continuous with the inner circumferential surface of the A split lock ring with a plurality of protrusions protruding from the tube and capable of expanding and contracting in diameter is inserted into the tube, and the protrusions of the lock ring are inserted into the plurality of holes drilled in the peripheral wall of the tube insertion part. Existing in pipe fittings made of

Next, this invention will be explained with reference to embodiments shown in the drawings.

1 is a pipe joint body, and both ends thereof are respectively pipe sockets 1.
1, 11', and a groove 111. is formed along the circumferential direction on the inner peripheral wall of the opening end. ．． 111' are provided, and an annular elastic body 2, 2' is attached to each of them.

3.3' is a tube insertion port, and there are multiple through holes 3 in the end peripheral wall.
1.31' is drilled.

Reference numerals 4 and 4' designate a lock ring in the form of a ring that can be expanded and contracted in diameter, and protrusions 41.41' with a number and spacing corresponding to the through holes 31.31' are protruded from the inner circumferential surface. .

The inner diameter of the lock rings 4, 4' is approximately the same as the outer diameter of the tube insertion ports 3, 3', and since they are split into one ring, they can be expanded or contracted.

Concave portions 112, 112' are provided on the inner circumferential wall of the tube sockets 11, 11' on the inner peripheral wall farther from the grooves 111, 111'.

This concave portion 112.112' is a part of the inner peripheral wall 113°1.
The small recesses 114 and 114 are provided continuously in the circumferential direction except for the recesses 112 and 112'.
' is provided along the circumferential direction all around the circumference.

In this way, the recessed portions 112, 112' are
By providing the lock rings 4, 4' continuously in the circumferential direction with the exception of 3.113', the lock rings 4, 4' form the concave portions 112, 11:? Since the lock rings 4, 4' and the tube insertion port 3゜3' can be rotated relative to each other, the lock rings 4, 4' and the tube insertion hole 3゜3' can be rotated relative to each other. Lock ring 4.4' (7
) The projections 41, 41' can be easily inserted into.

Although the small concave portions 114, 114' are not necessarily necessary, when the tube insertion ports 3, 3' are pulled in the detachment direction from the tube sockets 11.11', the lock rings 4, 4' The protrusion 4 is pressed in the radial direction at 114'.
1, 41' will not come off from the through hole 31t3i), and since the joint body 1 and the pipe fittings 3, 3' can be rotated relative to each other in this state, it is convenient when piping. good.

・7 To explain how to use the pipe joint of this invention, in advance, the concave groove 11.l of the pipe socket 112.11' is
Annular elastic bodies 2, 2 are attached to G111', and lock rings 4, 4' are attached to concave portions 112 and 112'.
Then, insert the tube sockets 3, 3' into the tube sockets 11, 11'.

The lock rings 4, 4' expand in diameter, fit into the tube insertion ports 3, 3', and slide on the outer peripheral surface.

The tips of the tube sockets 3, 3' are brought into contact with the stop bars, 1, 12 at the back of the tube sockets 11, 1.1-', and the through holes 3L31 are inserted.
' is the tube socket 11. li'o recess 112.112'.

Here, when the tube insertion ports 3, 3' and the tube sockets "j, 11' are relatively rotated, the inner ridges 41 of the lock rings 4, 4'
, 41' are inserted in alignment with the through hole 3L31'.

When the protrusion 41, 41' is inserted into the through hole 3L31', the diameter of the lock ring 4, 4' is reduced, and the notch hits the inner peripheral wall 113, 113' where the concave part 112 is interrupted, and the tube insertion hole is inserted into the hole 3L31'. 3, 3' and the pipe sockets 11, 11' cannot rotate relative to each other.

The connection is thus completed, and after that the lock rings 4, 4'
The protruding parts 41, 41' are inserted into the through holes 31.31', and the main body engages with the recessed parts 112.112' or the small recessed parts 114.114' auxiliary connected thereto. The tube insertion ports 11, 11' are prevented from coming off.

As mentioned above, the pipe joint of this invention has a protrusion on the inner peripheral surface of the lock ring that can be expanded and contracted in diameter in one piece, and this is inserted into the through hole arranged in the pipe insertion port, so it is different from the conventional one. By drilling a continuous groove on the outer circumferential surface of the tube insertion port, the decrease in strength due to the formation of continuous grooves can be reduced, and the labor of machining can be saved.

[Brief explanation of drawings]

Figure 1 is a vertical cross-sectional front view of the embodiment of the 9-drop pipe joint, Figure 2
The figure is a sectional view taken along line 1-11 in FIG. 1...Pipe joint body, 11, 11'...
・Pipe socket, 112.112'-・・・Concave part, 3,
3'...Tube insertion port, 31.31'...Through hole, 4,4'...Lock ring, 41.41
'・・・Prominent louse

Claims (1)

[Scope of utility model registration request] In a pipe joint in which a tube insertion portion is inserted and connected to a tube socket through an annular elastic body that is attached to the inner circumferential surface of an open end of the tube socket and forms a sealing portion, On the inner peripheral surface of the side pipe socket, nine continuous concave portions are provided along the circumferential direction leaving a part of the peripheral wall, and in the concave portions, a plurality of protrusions are protruded from the inner peripheral surface. A pipe joint in which a split lock ring whose diameter can be expanded and contracted is inserted, and a protrusion of the lock ring is inserted into a plurality of holes drilled in a peripheral wall of the pipe insertion part.