JPH0322623Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) This invention relates to the improvement of pipe joints, mainly flare-type pipe joints, used for piping of air conditioners and various fluid-using devices.

(Conventional technology) In air conditioners and devices that use various fluids,
When connecting piping forming a pressure fluid circuit, pipe joints such as those shown in FIGS. 4A and 4B are widely used because they have a small number of parts, a simple structure, and are easy to handle.

That is, it consists of a male member a that is connected to a conduit _P1 or frame extending from the equipment side, and a female member b that is rotatably and slidably attached to a conduit _P2 that extends from the pressure supply source side such as a pump. , the male member a has a large-diameter hexagonal collar 1a in the middle of a straight cylindrical main body 1, one side (the left side in the figure) forms a connecting part 2 such as a conduit, and the other side (the right side in the figure) The coupling side) is provided with a male thread 3a on the outer periphery to form a coupling part 3,
An annular seat surface 3b tapering at a predetermined angle is provided at its end, while the female member b has a female thread 4a inside a hexagonal nut-shaped main body 4, and a female member a Annular sheet surface 3b at the tip
The tip of the conduit _P2 fitted into the nut-shaped main body 4 is expanded to match the inclination angle of the tapered surface 4b at the back of the main body, and the flared portion 5 is male member A
The female thread 4a of the female member b is screwed into the male thread 3a of the pipe _P2 as shown in FIG. Both members a and b are joined by clamping pressure, and at the same time the joint portion is sealed.

(Problem to be solved by the invention) By the way, in the above-mentioned conventional pipe joint, when connecting and separating the male and female members a and b, the female member b is rotated many times with a tool such as a spanner. te, join,
They must be separated, and in a narrow space with crowded equipment, the number of times the spanner is applied (the number of times the hands are changed) becomes extremely large, which makes the work time-consuming and tends to result in insufficient connection.

Therefore, this invention provides a flare type pipe joint that allows the male and female members to be connected and separated easily and quickly without any trouble, and is suitable for use in narrow spaces.

(Means and effects for solving the problem) Based on the above-mentioned purpose, this invention involves fitting a conduit with a flared portion at the tip into a female member, and providing the flared portion of the conduit within the female member. As a pipe joint that connects the tapered surface and the seat surface provided at the joint end of the cylindrical male member with pressure, the central part of the joint cylindrical part of the male member is connected from the joint end at the required angle with respect to the orthogonal line of the axis. A plurality of concave grooves are provided on the cylindrical side, extending over half a circumference or less, and balls are provided in the coupling cylindrical portion of the female member so as to be able to appear and retract from each other in correspondence with the concave grooves on the male member, and the outer periphery of the coupling cylindrical portion In this case, a sleeve for ball restraint is fitted with a spring biased toward the joint end.

Then, when connecting the male and female members, the sleeve on the female member is moved backward to release the ball restraint, and the female side connecting tube is inserted into the male side connecting tube. When the balls fit into the proximal ends of the corresponding male grooves, the sleeve is advanced to restrain each ball, and in this state the female member is rotated within a half-rotation range. The ball ends in the recess and the male and female members are hermetically coupled.

(Example) In Fig. 1, A is a male member according to this invention, and a large-diameter polygonal collar 1 is located in the middle of a straight cylindrical body.
1b, one side (left side in the figure) forms a connecting cylinder part 11a for conduit _P1 etc. connected to the equipment, and the other side (coupling side) forms a connecting cylinder part 11c with a smooth cylindrical surface. A plurality of concave grooves 12 (two in the figure) are inclined clockwise from the joint end side to the connecting cylinder side at an angle α with respect to the perpendicular line y with the axis, each spanning a range of about 45 degrees, less than half the circumference. A circular seat surface 1 with a tapered end is provided at the connecting end.
3 is provided.

B is a female member, which connects the coupling cylinder portion 11 of the male member A.
A stepped cylindrical body is formed by the connecting cylindrical part 14a into which the pipe c is inserted, and the connecting cylindrical part 14b which is thicker and polygonal and to which the conduit _P2 on the pressure fluid supply source side is attached,
A male coupling cylinder part 11c is provided in the center of the coupling cylinder part 14a.
Inwardly tapered through holes 15 are provided at positions corresponding to the respective recesses 12 when the holder is inserted, and a ball 16 is provided in each through hole 15 with a portion protruding inward and only outwardly. It is movably housed,
Further, a sleeve 17 is provided on the circumferential surface of the coupling cylinder portion 14a.
are slidably fitted together, and a spring 18 disposed between the annular protrusion 17a provided on the inside thereof and the boundary step 14d of the coupling cylinder part 14a of the female member and the connection cylinder part 14b connects the coupling end. When the female member is not operated, it is held in a fixed position by a stopper ring 19 embedded in the end of the coupling cylinder portion 14a of the female member, and the head of the ball 16 is held by the inner surface of the annular projection 17a. Department has been suppressed.

A tapered surface 14 corresponding to the annular sheet surface 13 at the end of the male member is provided at the inner deep part of the coupling cylinder part 14a.
The distal end of the conduit _P2 , which is formed with a diameter of 1.c and is fitted into the female member B, is expanded to form a flared portion 20 so that the inclination angle of the tapered surface 14c matches.

When connecting the male and female members A and B, in FIG. 1, the sleeve 17 on the female member B is moved back to the right side, that is, to the non-combined side to release the restraint on the ball 16, and in this state, the female side connecting cylinder part 14a is connected to the male As the side connecting cylinder part 11c is fitted, each ball 16 on the female side will fit into the inclined concave groove 12 on the male side connecting cylinder part 11c.
Then, the sleeve 17 is freed and moved forward by the restoring force of the spring 18, and the annular protrusion 17a prevents the ball 16 from jumping out, and in this state, the female member A is inserted into the square connecting part. When the balls 14b are rotated clockwise by about 1/4 turn using a tool such as a spanner, each ball 16 moves toward the terminal end along the inclination of the recessed groove 12 as shown in FIGS. 2 and 3. Accordingly, conduit P ₂
The flare portion 20 of the female member B is clamped between the tapered surface 14c of the female member B and the annular sheet surface 13 of the male member A, thereby airtightly joining both the male and female members A and B.

In addition, in the connected state shown in FIGS. 2 and 3, the female member B is rotated about 1/4 turn counterclockwise to return the balls 16 to the proximal end of each recess 12, and at the same time, the conduit _P2 is removed. When the clamping pressure of the flare portion 20 is released, and in this state, the sleeve 17 is retreated to free the ball 16 and the female member B is pulled out, the ball is separated to its original state as shown in FIG.

(Effects of the invention) As described above, in this invention, a conduit with a flared portion at the tip is inserted into the female member, and the flared portion of the conduit is connected to the tapered surface provided in the female member and the connecting cylinder portion of the male member. As a type of pipe joint that is connected by pinching with a seat surface provided at the connecting end, a recess is formed in the center of the connecting cylinder part of the male member that is inclined at the required angle from the connecting end side toward the connecting cylinder side. A plurality of balls are provided over a range of half the circumference or less, and balls are provided in the coupling cylinder portion of the female member so as to be able to appear and retract from each other in correspondence with the recesses of the male member, and by the rotational movement of the balls with respect to the recesses. Since the female and male members can be connected and separated, there is no need to rotate the female member many times as in the conventional method, and it is possible to connect and separate the female and male members by rotating less than half a circle. Both members can be easily connected and separated, and the state of connection can be easily detected, making it suitable for use in confined spaces.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view of an embodiment of this invention in a separated state. FIG. 2 is a half-sectional side view of the combined state. FIG. 3 is a sectional view taken along the line XX. FIG. 4A is a half-sectional side view of a conventional joint in a separated state. Figure B is a half-sectional side view of the combined state. In the figure, A...male member, B...female member, 11a...
...Connecting portion, 11b...Brim portion, 11c...Connecting tube portion, 12...Concave groove, 13...Seat surface, 14a
...Connection cylinder part, 14b...Connection cylinder part, 15...Through hole, 16...Pole, 17...Sleeve.

Claims (1)

[Scope of utility model registration request] A pipe in which a conduit with a flared part at its tip is inserted into a female member, and the flared part of the conduit is pressed between a tapered surface provided in the female member and a seat surface provided at the joining end of a cylindrical male member to connect. In the joint, a plurality of recess grooves 12 are provided in the center of the coupling cylinder part 11c of the male member A, extending over a half circumference or less, and inclined at a required angle from the coupling end to the coupling cylinder part 11a side at a predetermined angle with respect to the orthogonal line of the axis. Balls 16 are provided in the connecting cylinder part 14a of the female member B so as to be able to come out and go in correspondence with the recesses 12 of the male member A, and a sleeve 17 for suppressing the balls 16 is connected to the outer periphery of the connecting cylinder part 14a. A pipe fitting that is fitted with a spring biased end.