JPS5817193Y2 - pipe fittings - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an improvement of a pipe joint.

For example, as shown in Japanese Utility Model Application Publication No. 52-170318, an insert having a tube sealing convex portion on the outer circumferential surface and a slide ring having a tube sealing convex portion on the inner circumferential surface are attached to a pipe joint body. There is a known pipe joint that is fitted coaxially into the inside of the insert and connected by sandwiching the pipe fitted into the insert between two pipe seaming convex parts of the insert and the slide ring. However, in this type of pipe joint, a) the inner diameter of the tube sealing convex part in the slide ring is set to a constant value smaller than the outer diameter of the tube,
A large amount of force is required to insert and remove the tube, and smooth operation cannot be performed.

b. The tube must be removed while the slide ring is pushed in strongly, making the operation cumbersome and making it impossible to insert and remove the tube with one hand.

There were other drawbacks.

In view of the above, the purpose of the present invention is to provide a pipe joint that allows tubes to be attached and removed easily and quickly with a small amount of force. In the distal side expansion of the fluid flow path inside,
A cylindrical part of a collet fixed to a joint body, in which a sliding tube with a bulging part around the mouth part into which the tube is fitted is inserted so as to be slidable in the axial direction through a sealing material, and the collet is fixed to the joint body. At the same time, a plurality of elastic pieces are formed by cutting a plurality of slits in the elastic piece, and a claw is thrust inside the tip of each of these elastic pieces, and a ring is placed around the outer circumference of each of these elastic pieces to cause the elastic pieces to expand. The ring fits slidably in the axial direction between the distal end position to restrain and the base end position to allow expansion of the elastic piece, and the claw and the sliding tube are prevented from expanding by this ring. A feature of the present invention is that the tube is disposed so that the tube fitted in the bulge engages with the claw when the sliding tube moves in the direction of removal.

In the pipe joint described above, when connecting a tube, the ring is moved to the proximal end side that allows the elastic pieces to expand, and in this state, the tube is fitted into the sliding tube.

Next, if you move the ring to the tip side of the elastic piece,
The expansion of the elastic piece is suppressed, and even if a force in the pulling direction is applied to the tube in this state, the tube will be held between the bulge of the sliding tube and the claw of the elastic piece, and the tube will not be pulled out. Prevented.

The tube is removed by moving the ring toward the proximal end to release the elastic pieces so that they can expand, and then pulling the tube in this state.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings. In FIGS. 1 to 3, a joint body 1 having a fluid flow path 2 therein is mounted on the outer surface of its proximal end. screw 3
In the enlarged chamber 4 on the distal end side of the fluid flow path 2, a sliding tube 6 equipped with a bulging part 7 into which the tube 5 is fitted around the opening of the distal end, and a pair of locking walls 8, It is arranged to be slidable in the axial direction via a sealing material such as an O-ring 11 fitted in a groove 10 between the two.

The bulging portion 7 is configured such that the dashed line 7a behind the tapered surface is an inclined surface to reduce the frictional force against biting of the tube 5, thereby making it easy to insert and remove the tube 5 in the bulging portion 7. ing.

The collet 12 fitted into the base 13 of the joint body 1 is
By providing a locking part 15 around the base 13, the movement range of the sliding tube 6 is limited to the range shown in FIGS. 3 and 5, and the sliding tube 6 is covered with the base 13. A cylindrical portion 14 is provided in series, and a plurality of cuts 16, 16 . By cutting out a plurality of elastic pieces 17, 17. . . . and each of these elastic pieces 17, 17 . 1 nail inside the tip of...
8,18. It is an outstanding development of...

Thus, the elastic pieces 17, 17. A ring 19 is slidably fitted in the axial direction on the outer periphery of the ring 19.
is at the tip position shown in FIG. 3, each elastic piece 17,
17. The outward curvature of the tip of ... is suppressed,
When in the proximal position shown in FIGS. 1 and 5, the tips of the elastic pieces 17, 17, . When the sliding tube 6 is moved toward the distal end, that is, in the withdrawal direction, the tube 5 fitted into the bulge 7 is moved by the elastic piece 1 during the movement.
The tube 5 is pressed into engagement with the pawl 18 of the bulge 7 and the pawl 18, so that the tube 5 is sandwiched between the bulging portion 7 and the pawl 18.

In addition, in the figure, 20, 20. ... is the elastic piece 17,
17. A ring stopper protruding from the tip of 21
．． 21, . . . are positioning protrusions of the ring 19.

In order to connect the tube 5 to the pipe joint configured in this way, it is sufficient to move the ring 19 toward the proximal end and then fit the tube 5 into the sliding tube 6, as shown in FIG. At the time of fitting, the fitted state of the tube 5 is determined by the elastic pieces 17, 17.
・・・・・・Cut in between') 16,16.・・・・・・
It can be confirmed from the elastic pieces 17, 17. Since the tips of the tubes 5 are in a state where they can freely curve outward, the tubes 5 are attached to the claws 18, 18 . It can be easily fitted while avoiding obstacles caused by... etc.

Then, when the ring 19 is moved toward the tip side as shown in FIG. 3, the elastic pieces 17, 17 . . . . is prevented from curving outward, and in this state, by pulling the tube 5 toward the tip side or by applying fluid pressure to the fluid flow path 2, the sliding tube 6 and the tube 5 are 4
As shown in the figure, even if the tube 5 moves toward the distal end, the claws 18, 18, . . . . engages with the bulge 7 and the claws 18, 18. This clamping force increases in proportion to the external force pulling the tube 5 and the internal fluid pressure, so the tube 5 will not be pulled out.

Conversely, to remove the tube 5, move the ring 19 toward the proximal end as shown in FIG. 5 in the state shown in FIG. 3, and remove the elastic pieces 17, 17 . After making the tips of the tubes 5 freely bendable outward, the tube 5 can be pulled toward the tips of the tubes 5. As a result, the tubes 5 become elastic pieces 17, 17, and 17, as shown in the figure. It is pulled out while curving the tip outward.

As described above, according to the pipe joint of the present invention, the tubes can be connected reliably and quickly by fitting the tubes into the bulges of the sliding tubes and preventing the elastic pieces from curving outward with the rings. In addition, the tightening of the tube by the bulge and the claw is not done by the movement of the ring, but by the movement of the bulge relative to the claw, so the ring can be easily moved with a small force. Furthermore, the tube can be pulled out from the bulge easily and quickly by simply sliding the ring, without the need for any other tools, which significantly improves piping work efficiency. be able to.

[Brief explanation of the drawing]

FIG. 1 is a side view showing the external appearance of the pipe joint of the present invention, FIG. 2 is a front view thereof, and FIGS. 3 to 5 are longitudinal sectional views showing the movement of each member. 1... Joint body, 2... Fluid flow path, 4
...Expansion, 5...Tube, 6...
...Sliding pipe, 7...Bulging part, 12...
・Collet, 14...Cylindrical part, 16...
・Cut, 17...Elastic piece, 18...
Nail, 19...Ring.

Claims (1)

[Scope of utility model registration request] A sliding tube with a bulge around the mouth where the tube is fitted is inserted into the enlarged chamber on the distal side of the fluid flow path in the joint body so as to be slidable in the axial direction via a sealing material. A plurality of slits are cut in the cylindrical part covering the sliding tube of the collet fixed to the collet to form a plurality of elastic pieces, and a claw is protruded inside the tip of each of these elastic pieces. A ring is fitted around the outer circumference of the elastic piece so that it can slide in the axial direction between the tip position that prevents the elastic piece from expanding and the proximal position that allows the elastic piece to expand. The pawl that is restrained from moving and the bulging portion of the sliding tube are arranged so that the tube fitted in the bulging portion engages with the pawl when the sliding tube moves in the removal direction. A pipe joint featuring: