JPS608398B2 - Plug-in connection member - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a plug-in connection member for releasably connecting two materials, the plug-in connection tube piece into which one of the two members inserts the other member. , the plug-in connection piece is formed with a longitudinal slit from its free end, and has spring-elastic chuck jaws distributed over the circumferential wall and separated from each other by the slit. furthermore, a clamping ring is arranged movably in the axial direction on the plug-in connection, which clamping ring in its active position grips the free end of the plug-in connection formed as a securing area and A type in which a chuck spring piece is held in a position that holds another reeded member, and in a non-active position, it is retracted from the secured range and the chuck spring piece is released. Regarding.

This type of plug-in connection member was awarded the first French patent.
It is known from specification No. 569896.

The opening and vertical mounting ring of the connecting coupling element for a conduit made of flexible material is designed as a threaded sleeve,
The threaded sleeve is screwed from its free axial end into a thread formed behind the chuck catch piece of the bayonet connection piece. This kind of threaded sleeve is
Grip the chuck spring piece except for the front end face side having a gap in the radial direction. The free end of the chuck pawl spring piece is designed as a steeply inclined conical circumferential surface, the diameter of which increases in the opposite direction to the end of the chuck pawl spring. Such a conical periphery is assigned to an inclined surface formed on the inner periphery of the threaded sleeve, which sloping surface is arranged on the said conical periphery during the screwing of the threaded sleeve. do. Due to the inclined surface and the strong inclination of the conical circumference, further tightening of the threaded sleeve forces the chuck spring piece obliquely in the direction of the central axis. As a result of this pressing, the press-deformed circumferential surface of the plug-in connection piece located behind the chuck spring piece and directed toward the central axis presses from the outside against the hose end which is supported from the inside by the support tube. The disadvantages of such known plug-in connections are as follows. In other words, when the threaded sleeve is tightened, permanent deformation is caused in the chuck spring piece. Such a plastic deformation of the plug-in connection piece is intentionally provided, since it allows the push-in deformation sleeve to push in the hose end. The bolt is only useful for one use.Furthermore, it takes a relatively long time to screw the threaded sleeve, and for this reason the force exerted on the chuck spring piece during screw tightening. is very difficult to transmit large forces, and the brackets do not distribute the forces, and this leads to permanent deformation of the support tube.Furthermore, the support tube, which is always necessary in the known device, is an additional Not only is it a component, but it also increases the flow resistance on its end face.Moreover, when connecting the hose, the support tube must first be installed inside the hose, which is difficult.Finally, the threaded sleeve If the screws are not tightened, the hoses easily slip off the plug-in fittings and are easily lost due to the brackets.An object of the present invention is to eliminate the above-mentioned disadvantages and to simplify the connection and disconnection of hoses. The object of the present invention is to provide a plug-in connection of the type mentioned above, which is simply and quickly possible, and which is simple to assemble and also consists of a small number of parts.

In order to solve such problems, the present invention provides a structure in which one member is made of a material that is easy to bend as the other member.
The connecting element is designed as a connecting element for connecting a hose carrying compressed air, gas or liquid to a pneumatically or hydraulically actuated control device.
It consists of a plug-in connection piece and a mating connection piece on the side opposite to the plug-in connection piece; It has a tapered outer circumferential surface with a slope, and the securing range where the outer circumferential surface has a relatively gentle slope is frictionally coupled with the tightening ring at the operating position of the tightening ring, so that the tightening ring is maintained by self-binding action.

To produce the connection, only the hose end has to be introduced into the bayonet connection and the clamping ring has to be moved linearly into the working position.

Removal of the hose is therefore correspondingly simple. The chuck spring piece is not maintained in a permanent deformation and automatically returns to its starting shape in a spring-elastic manner as soon as the clamping ring is moved into the inactive position. Furthermore, the cotton ring reaching the tapered outer circumferential area gradually presses the chuck spring piece inward, so that no extreme force is generated. In this case, the maximum shrinkage of the plug-in fitting is related only to the outside diameter of the secured area and not to the respective operator due to the brackets, and therefore to the specified diameter of the hose. is always held with the same force even after the joint is repeatedly released. Furthermore, since the clamping ring is arranged in its inactive position behind the elastically expanding chuck spring piece, it cannot be accidentally lost. Furthermore, the uniform radial compression of the chuck spring piece on the hose end creates an elastic resistance force in the hose material, so that the hose end is supported on its own and no internal support tube is required. The technical disadvantages associated with the arrangement of the support tubes therefore also do not occur. The invention will be explained below with reference to the exemplary embodiments shown.

The bayonet connection shown in FIG. 1 and FIG.
2 and a clamping ring 18 which is movable back and forth in the circumferential direction along the outer circumference of a threaded coupling fitting 14 and a flange 6, which serves for example to connect to a fixed metal conduit. have. The insertion tube piece has a vertical slit formed from its free end and has a plurality of spring-elastic chuck spring pieces distributed approximately evenly over the circumferential surface, and the chuck spring pieces are provided with a plurality of elastic chuck spring pieces when tightened. The end of the hose 7 is gripped uniformly and elastically from the entire circumference by the inward push of the bracket. In the illustrated embodiment, the plug-in connection piece 12 consists of four chuck spring pieces 12a to 12d, which are separated from one another by a slit 13. The slit 13 is a base surface 13 extending in the radial direction.
It ends at a. The connecting member consists of a rotationally symmetrical member. In the assembled state, the threaded coupling connection piece 14 of the subsequent coupling part is generally connected to a fixed metal conduit or to a pneumatically or hydraulically actuated device, for example a cylinder of a cylinder schnit. It is screwed into the head, and this pais, flange 16
can serve as a stop and for additional mechanical stability, or can be of hexagonal design and used for actuation. For connection to a compressed air or pressure medium hose, the clamping ring 18 is first brought into a non-active position corresponding approximately to the position of the base surface 13a of the slot 13 between the chuck spring pieces 12a to 12d. .

However, depending on the spacing, it can be returned to the flange 16. As a result, the plug-in connection piece 12, which is designed as a chuck, is completely opened. This is because the chuck spring piece is released in the inactive position of the clamping ring, so that the hose weave is now inserted into the vertical opening of the bayonet connection piece. The clamping ring 18 is then moved axially and brought over the tapered outer circumferential surface 9 of the bayonet fitting 12 into the working position shown. This 'well, plug-in connection tube piece 1
The tapered outer circumferential surface 9 of 2 has a radius that increases towards the free end, so that the movement of the clamping ring 18 into the active position takes place in the direction towards the axial end. A securing range 8 of the insertion tube piece is connected to the tapered outer circumferential surface 9, and the securing range has a gentle slope compared to the tapered outer circumferential surface 9. The clamping ring 18 is held fixed on this securing area 8 without additional means by self-locking action. The outer circumferential surface of the plug-in connection piece 12 and the inner circumferential surface of the clamping ring are designed flat. When the attachment ring 18 is in the active position, the chuck jaws forming the bayonet connection piece 12 are more or less completely closed, so that the inserted hose end cannot slip out.

This force and securing action is achieved by the teeth 26 of the hose 7.
It is still raised on the inside of the axial bore of the plug-in fitting 12. A shoulder 20 is preferably provided on the inside of the plug-in fitting 12, which shoulder is offset inwardly with respect to the base surface 13a of the slot 13 between the chuck spring pieces. The shoulder 20 serves as an axial stop for the hose 7, which is inserted into the bayonet fitting. Furthermore, since the slit 13 between the chuck spring pieces does not extend as far as the shoulder 201, it is ensured that the bayonet connection is sufficiently sealed, which means that the hose is not confined within the hose. This is because under the influence of overpressure, the hose is sealed by a closed cylindrical surface surrounding the forward end of the hose. Third
The embodiment shown in the figure differs from the previously described connection module in the following general respects.

This means that the hose 25 ends at the base surface 27 of the slit between the chuck spring pieces, and that the inside of the axial bore of the chuck pawl is toothless and flat. The aforementioned subsequent connecting part is extremely simple to assemble and is quick and easy to use.

Furthermore, this ensures a secure connection, and this pa...
The hose or hose end has a certain degree of stiffness in the radial direction, which is readily available in commonly used plastic hose ends. The connecting member, like the vertical mounting ring, is made of a suitable plastic. Moreover, especially the chuck spring piece 12
The suitably designed pads in connection with a to 12d can be manufactured from steel or brass.

[Brief explanation of the drawing]

1 is an end view of a plug-in connection member according to the invention, FIG. 2 is a longitudinal sectional view of the plug-in connection member according to FIG. 1, and FIG. 3 is a longitudinal sectional view showing a modified embodiment of the embodiment of FIG. 1. be. 7...Hose, 8...Secure range, 9...
・Outer peripheral surface, 12... Plug-in connection tube piece, 12a
~12d...Chuck spring piece, 13...Slit, 13a...Base surface, 14...Coupling connection pipe piece, 16...Flange, 18... ... Cotton ring, 20.... - Shoulder, 26...Hose, 26...Teeth, 27...Base. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] 1 A plug-in connection member for releasably connecting two members, wherein one of the two members has a plug-in connection tube piece 12 into which the other member is inserted, and the plug-in connection tube The piece 12 is formed from its free end with a longitudinal slit 13 and has spring-elastic chuck spring pieces 12a to 12d separated from one another by the slit and distributed over the circumferential wall, and furthermore has spring-elastic chuck spring pieces 12a to 12d distributed over the circumferential wall. A clamping ring 18 is arranged movably in the axial direction on the connecting tube, which in its active position grips the free end of the plug-in connecting tube 12, which is formed as a securing area, and clamps the spring tab. is held in a position that holds the other inserted member, and is further retracted from the securing range in the non-operating position and releases the chuck spring piece, wherein said one member is is formed as a connection coupling member for connecting a hose 7 for conducting compressed air, gas or liquid, which is made of a flexible material as the other member, to a pneumatically or hydraulically actuated control device. The connecting piece consists of a plug-in fitting 12 and a connecting fitting 14 opposite the plug-in fitting;
Furthermore, the plug-in fitting 12 has a tapered outer circumferential surface 9 in the region of the slot 13 or chuck pawl with an outer diameter that increases towards the free end, the outer circumferential surface having a relatively gentle slope. The securing range 8 is transitioned to no step part, and the securing range 8 is frictionally connected to the clamping ring at the working position of the clamping ring, so that the clamping ring is held by a self-locking action. Plug-in connection member.