JPS6143595B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hose joint, and more particularly, to a hose joint that allows a hose to be easily attached and detached, and particularly to a hose joint that allows a hose to be pulled out with ease.

Various types of hose joints have been developed to connect tubes for transferring fluids.
The general structure is that the hose inserted into the joint pushes out the locking device built into the joint body, and then tightens the locking pawl into the tube using a screw or other means. There are also so-called one-touch type hoses in which the locking device has elasticity so that the hose is locked just by inserting the tube, and the tube can be pulled out using a separate lock release means.

However, although these hose fittings generally allow easy insertion and locking of the hose, the locking device does not fully open and often makes it difficult to remove the hose. This tendency is particularly strong when the lock device is constantly springing toward the hose and the hose is inserted against this spring. In addition, the locking device is always springing toward the side that opens the hose, and a separate means is required to force the locking claw into the hose. For example, when a force is applied to the hose in the direction of extraction, the locking claw with a tapered outer surface locks into the inner surface of the joint body. Even in a joint that has a means to apply force in the direction of sliding the taper of the hose and tightening the locking pawl, when pulling out the hose, if the locking pawl is pushed in and moved in the direction where the taper opens, the locking pawl itself will tighten. The locking pawl is opened by the resilient force of the locking pawl, but as the hose ages, the traces of the locking pawl digging into the hose form grooves, and the resilient force of the locking pawl also weakens and does not fully recover, causing the hose to open. You may not be able to pull it out.

In this way, common problems with hose fittings include:
In a joint from which the hose can be easily removed, the locking claw must have a reliable tightening device, which makes the operation complicated. Furthermore, in a joint where the hose can be easily inserted and secured, the lock release device must be reliable, making the operation complicated.

The inventor focused on the fact that in this type of hose coupling locking device, the locking pawl itself requires rigidity, and the movement of the locking pawl requires sufficient flexibility and elasticity, and conducted extensive research. As a result of overlapping, we moved away from requiring the lock pawl itself to have the above contradictory properties at the same time, and by holding the rigid but relatively low rigidity lock pawl with an elastic material such as rubber, the lock pawl and the elastic body By ensuring the necessary rigidity and flexibility in the movement of the locking pawl, we were able to achieve the desired purpose.

In other words, an object of the present invention is to use a flexible locking pawl with low rigidity by using a rubber-like elastic body as a base for the locking pawl of the locking body, so that the lock can be opened and closed smoothly. The purpose of the present invention is to provide a hose joint in which the locking pawl does not dig into the outer wall of the hose more than necessary and form groove marks, and furthermore, the sealing performance is improved due to the presence of an elastic body. A locking body having a plurality of locking claws that stands up and sinks into the outer wall of the hose is disposed so as to prevent the hose inserted into the joint body from being pulled out, and the locking claws of the locking body are rotated in the unlocking direction. In the hose joint having a release means for pushing down the locking body, the locking body includes a ring portion that fits into the joint main body, and a plurality of the plurality of hook-like tips extending from the end surface of the ring portion so as to face inward of the ring portion. The diameter of the arc formed by the tips of these multiple locking claws is set to be slightly smaller than the outer diameter of the hose to be inserted and connected. A substantially cylindrical elastic sleeve having an inner diameter slightly larger than that of the lock claw and having one end formed with a tapered surface in the shape of a slipper is provided, and the tapered surface of the elastic sleeve is in contact with the lock pawl. The lock pawl is fixed within the joint body so as to move in the upright direction.

Reference numeral 10 denotes a joint body, and the inner wall surface thereof is provided with a first step 12 and a second step 14 whose diameters increase one after another from the inlet portion toward the back.

Reference numeral 16 designates an elastic sleeve made of an elastic material such as rubber into a substantially cylindrical shape.
4, and is fixed from the rear with a presser tube 18 so as to be in contact with the peripheral wall surface perpendicular to the axis at 4.

To describe the shape of the elastic sleeve 16 in more detail, as shown in the plan view of FIG. 2 and the sectional view of FIG. A tapered part 22 in the shape of a slit is provided, and a ring 24 having a substantially semicircular cross section so as to function as an O-ring is provided at the rear part.
are provided around the area. Further, the outer peripheral portion of the elastic sleeve 16 corresponding to the tapered portion 22 is formed into a step portion 27 whose diameter is reduced by one step so that a locking body ring portion, which will be described later, is fitted therein. Further, a groove 40 is formed from the end surface of the elastic sleeve 16 to the tapered portion 22, into which a hook-shaped locking pawl of a locking body (to be described later) is fitted, and the locking pawl is movable from the back side.

In FIGS. 4 and 5, 39 is a locking body.

Numeral 26 indicates four locking claws extending from the end surface of the ring portion 41 at equal intervals.

The lock pawl 26 has a hook-like cross section with an approximately inverted U shape, and its tip extends inward of the ring portion 41 (FIG. 5).
The shape of the circular arc formed by the tips of the four lock claws 26 is set to have a slightly smaller diameter than the outer diameter of the hose 32 to be connected.

The locking body 39 formed in this way has a ring portion 41 that is connected to the elastic sleeve 1 as described above.
It is assembled into the above-mentioned joint main body 10 in combination with the elastic sleeve 16 so that the lock pawl 26 fits into the stepped portion 27 of No. 6 and the groove 40.

Therefore, the lock claw 26 is attached to the elastic sleeve 16.
The tapered part of the bullet points the bullet in the upright direction.

Reference numeral 28 denotes a release ring, which has a tapered thin blade portion 30 on the outside of its tip, and is attached to the hose insertion port of the joint body 10. When the release ring 28 is pushed inward into the joint body 10, the thin blade portion 30 enters between the lock pawl 26 and the outer periphery of the hose 32, pushes the lock pawl 26 down toward the inner wall of the joint body 10, and releases the hose 32 from the lock pawl 26. Further, a flange 34 is provided at the rear end, a locking ring 36 is provided around the intermediate portion, and a first step 12 as a locking protrusion is located between the flange 34 and the locking ring 36 near the entrance of the joint body. The release ring 28 is loosely inserted so that when the release ring 28 slides along the outer wall of the hose 32, the flange 34 and the locking ring 36 come into contact with the first step 12 to restrict reciprocating movement.

With the above structure, when the hose 32 is inserted from the insertion port of the joint body 10, the hose 32
is inserted to the fixed position while pushing open the lock claw 26, and the lock claw 26 is pressed against the outer wall side of the hose 32 by the elastic sleeve 16. When the hose 32 is pulled out, the elastic sleeve 16
Due to the friction between the elastic sleeve 16 and the outer wall of the hose 32, the elastic sleeve 16 is slightly deformed so as to be pulled out, and the locking pawl 26 is further erected, causing the hose 32 to
The hose 32 is reliably locked by sinking into the outer wall of the hose 32.

When you want to pull out the hose 32, use the release ring 2.
8 is inserted deep into the joint body 10, the thin blade part 30 of the release ring 28 pushes the lock claw 20 against the elastic stress of the elastic sleeve 16 toward the inner wall of the joint body 10, and releases it from the outer wall of the hose 32. The lock can be completely opened and the hose 32 can be pulled out very easily.

As described above, according to the hose joint according to the present invention,
Since the lock pawl is brought into surface contact with the tapered surface of the elastic sleeve, the lock pawl does not deform when raised, even if it is not made of a particularly highly rigid material. Therefore, it is possible to use a sufficiently flexible lock pawl, which allows the lock to be opened and closed extremely smoothly with one touch, making it easy to handle, and allowing the pressing force of the elastic sleeve to escape to areas that do not come in contact with the lock pawl. Therefore, unlike in the past, the locking pawl does not dig into the outer wall of the hose more than necessary and groove marks are not formed due to aging, and the hose can be easily pulled out at any time.

In addition, since the inner diameter of the elastic sleeve is made slightly larger than the outer diameter of the hose to be inserted, the end of the hose is guided by the inner wall of the sleeve during insertion, allowing for easy and secure insertion. When back pressure is applied in the direction of leakage, the elastic sleeve is compressed within the joint body and expands in the direction of increasing wall thickness, so the elastic sleeve adheres to the outer wall of the hose and the inner wall of the joint body, creating a reliable seal. Not only this, but also the locking pawl is further pressed in the upright direction when it is expanded, so it has the remarkable effect of further preventing it from coming off.

Although the present invention has been variously explained above with reference to preferred embodiments, the present invention is not limited to these embodiments, and it goes without saying that many modifications can be made without departing from the spirit of the invention. It is.

[Brief explanation of the drawing]

The drawings show an embodiment of the hose joint according to the present invention, and FIG. 1 is a cross-sectional diagram thereof, and FIG. 2 is a view of the elastic sleeve 16 viewed from the direction in which the hose is inserted.
FIG. 3 is a cross-sectional view taken along the line A-A', FIG. 4 is a plan view of the locking body, and FIG. 5 is a cross-sectional view taken along the line B-B'. 10... Joint body, 12... First step, 14...
...Second step, 16...Elastic sleeve, 18...
Presser tube, 20...contact part, 22...tapered part,
24...Ring, 26...Hook claw, 27...Step part, 28...Release ring, 30...Thin blade part, 3
2... Hose, 34... Flange, 36... Locking ring.

Claims (1)

[Scope of Claims] 1 A locking body having a plurality of locking claws that stands up and sinks into the outer wall of the hose is disposed in the joint body so as to prevent the hose inserted into the joint body from being pulled out. In a hose joint having a release means for pushing down a locking claw of a stopper in a direction to release the lock, the locking member has a ring portion that fits into the joint body, and a hook-like tip extending from an end surface of the ring portion into the ring portion. The diameter of the arc formed by the tips of the plurality of locking claws is slightly smaller than the outer diameter of the hose to be inserted and connected. On the other hand, a substantially cylindrical elastic sleeve having an inner diameter slightly larger than the outer diameter of the hose and having a tapered surface at one end is provided, and the elastic sleeve is called an elastic sleeve. The hose joint is fixed within the joint main body so that the tapered surface of the hose contacts the locking pawl and propels the locking pawl in an upright direction.