WO2015104067A1

WO2015104067A1 - Hose

Info

Publication number: WO2015104067A1
Application number: PCT/EP2014/054610
Authority: WO
Inventors: Joakim Trumpler
Original assignee: Ds Produkte Gmbh
Priority date: 2014-01-10
Filing date: 2014-03-10
Publication date: 2015-07-16
Also published as: DE202014000070U1

Abstract

The invention relates to a hose, comprising a flexible outer sheath (1), characterized by an elastic band (7) arranged in the interior space of the hose, said band being connected at least in the two end regions to the outer sheath (1) and/or the connection pieces (2, 3) of the hose in a tension-resistant manner.

Description

tube

The invention relates to a hose with a flexible outer shell.

Hoses especially for use in the home and garden are known from public prior use. Usual garden hoses need space for your storage, example ^¬ rolled up on a hose cart.

There is, for example, from DE 20 2012 012 663 Ul already sawn known to create expandable tubes which undergo County ^¬ exactly stretching when put under pressure. If they are emptied or the pressure is reduced, they experience a length contraction and can thus be stored in a space-saving manner. The length contraction is carried out by a resilient inner tube on which a flexible and foldable in length outer tube is arranged.

The invention is based on the object to provide a hose of the type mentioned, which is simple and inexpensive to manufacture and space-saving storage allowed.

This task is solved by a in the interior of the

Hose arranged elastic band which is connected at least in the two end regions with the outer shell and / or fittings of the hose tensile strength. First, some terms used in the invention are explained. The term hose refers to flexible devices for

Passage of liquids, especially water. The

The invention particularly relates to hoses for use in the home and garden. The hose has a flexible outer shell. Flexible, in this connection means that on the one hand allows a conventional curvature of the hose, on the other hand, also a length flexibility to the effect that this Au ^¬ ßenhülle permits longitudinal expansion or contraction in length of the tube depends on the pressure prevailing in the tube pressure. The outer shell is preferably flexible in this sense, but not elastic. This means that it opposes ei ^¬ ner of linear expansion of the hose no elastic return ^¬ restoring force. In particular, the flexibility may be designed so that the outer shell unfolds in the manner of a concertina during a length contraction. This unfolding is not regular in general, son ^¬ countries take place rather in the manner of a Schrumpeins. According to the invention, the outer casing can itself be made liquid-tight and pressure-resistant, but it can preferably cooperate with a liquid-tight inner tube in the manner described in more detail below.

In the interior of the hose, an elastic band is arranged. The term band is to be understood functionally and not limited to a particular cross-sectional shape. It may be a ribbon having a strand that traverses substantially the entire length of the tube. AI ternatively, the tape may have a plurality of substantially parallel or interconnected (beispielswei ^¬ se twisted or braided into each other) strands aufwei ^¬ sen. Optionally, the band may be divided in the longitudinal direction of the tube into several sections, which are connected ^{miteinan ¬} . It is according to the invention to a tension element, the elastic restoring force strives to bring the hose into its contracted and thus space-saving storage form.

The elastic band preferably runs freely through the entire interior of the tube and is connected only in its two end regions with either the outer shell, the inner tube or preferably with fittings of the hose tensile strength. Tensile means in this context that the elastic restoring force of the band is transferred to these two end portions such that the desired length contraction of the tube can be done. Of the

According to the invention, the hose can have a plurality of length sections, at the beginning and at the end of which the band is in each case connected in a tensile-resistant manner to the outer cover, the inner hose or an intermediate piece arranged in the hose.

The term fittings designates connectors such as conventional hose connectors with which the hose can be connected to a faucet, garden tools or the like.

The invention is based on the realization that it is advantageous from the point of view of cost-effective production and functionality, the desired length ^{Kontrakti ¬} on the hose for the purpose of space-saving storage a separate and trained only for this purpose supply assigned (the elastic band), which does not participate in the actual function of the water transport. This makes it possible to select material, cross-sectional design and other design of the elastic band exclusively so that the desired spring elasticity and thus length contraction is achieved. In this way, a reliable length contraction of the hose is also possible over a large number of use cycles. By contrast, in DE 20 2012 012 663 Ul uses a federelasti ^¬ shear inner tube to effect the desired length contraction for space-saving storage. The choice of material and the design of this inner ^¬ hose must be aligned both on the basis of the desired spring elasticity and the water transport function. This is comparatively expensive and less kos ^{¬-effectively.}

The tube according to the invention is contracted in the absence of pressure in the interior (water pressure) by the elastic band in its comparatively short storage position. It can be stored in a space-saving way. The flexible outer sheath ^¬ folds on it. If the hose is connected to a water pipe What ^¬ and built up inside water pressure, then a length expansion against the spring force of the elastic band. Preferably, this length expansion takes place until the flexible outer shell is fully unfolded. The elastic band is preferably by a factor 2-10, preferably 2-6 wei ^¬ ter, more preferably 3-4 elastically extensible. This elastic extensibility preferably correlates with the possible length expansion of the tube, which is preferably limited by the described full deployment of the flexible outer shell.

The restoring force of the elastic band should preferably be chosen such that the tube is contracted after stopping the water and reducing the internal pressure. The contraction can already take place with hose spread out on the floor, in which case the restoring force is sufficient to overcome the friction of the outer shell on the floor. Alternatively, it can be provided that the restoring force then contracts the tube when it is manually brought into the storage position, for example rolled up. The restoring force according to the invention may preferably be between 15 and 100 N, more preferably 20 and 80 N, more preferably 25 and 65 N. The restoring force is measured at the complete elongation of the elastic band with fully unfolded hose.

The material of the elastic band is preferably selected from the group consisting of elastomeric plastics and synthetic or natural rubbers. Particularly preferred materials are latex and the group of ther ^¬ thermoplastic elastomers (TPE). Thermoplastic elastomers are elastomers which become thermoplastically deformable above a certain temperature. In this way, they can be brought into the desired shape and length and then have cooled the desired elastomeric properties. The permanent elasticity of the elastic band is sufficient to allow a sufficient number of length expansions and length contractions for the intended use of the hose before any significant material fatigue or breakage occurs. For example, between 200 and 5,000 contraction Cycles (complete elongation and subsequent contraction) may be possible, also conceivable are 300-1,500 cycles or 400- 500 cycles. The cross-sectional shape of the elastic band may be, for example, circular or rectangular. The thickness or

Diameter of the band may for example be in the range of 2-8 mm, more preferably 4-7 mm, more preferably 5-6 mm.

A preferred material for the flexible outer shell is a textile material (preferably woven or knitted fabric). In ^¬ example, a polyester fabric can be used. The material thickness of the flexible outer shell may preferably be in the range 0.2-1 mm, more preferably 0.3-0.6 mm or 0.35 and 0.5 mm. These material thicknesses are both creating sufficient strength and also sufficient Fle ^¬ bility to unfold the outer shell during storage.

Often, it will be preferable for the flexible outer shell to provide substantial protection against external influences, to provide the substantial part of the compressive strength of the hose and to limit the length of the hose (when fully extended). The liquid-tightness of the tube is then effected by a separate inner tube. This liquid-tight inner tube can be a separate inner tube which is not connected to the outer sheath or the connecting pieces or only at the ends of the tube. In this embodiment, when the hose is subjected to water pressure, the inner hose is pressed radially against the outer shell. Alternatively, the liquid-tight inner tube with the flexible outer shell can be connected flat. For example, it may be glued or laminated thereon. The liquid-tight inner tube preferably contributes just as little as the outer shell to the restoring force, which again contracts the tube, which has been expanded in length, after pressure has been released. This restoring force is preferably applied exclusively or substantially exclusively by the elastic band. The elastic band preferably runs in the interior of the inner tube, it may alternatively be arranged between the inner tube and the outer sheath in the case of an inner tube which is not connected in a planar manner to the outer sheath. The liquid-tight inner tube preferably has a PVC or PU material. The material thickness can at Be ^¬ rich 0.1-0.6 mm, preferably 0.2-0.5 mm, more preferential ^¬ as 0.3-0.4 mm. The restoring force of the elastic band is preferably transferred in each end portion of the tube ^¬ on the fittings of the hose. For this purpose, the elastic band may be connected preferably in each end region of the tube with egg ^¬ nem holding piece that is in turn connected to the tension-proof fitting of the hose. It can be integrally formed on it. Alternatively, the holding piece may be a separate component that is introduced, for example, in the axial direction from the connection side into the connection piece. An end portion shaped, for example, in the manner of a hook or eyelet may protrude into the tube and be connected to the elastic band. A correspondingly shaped second end portion of the holding piece uses the from the connection side occurring to the tube side of the connecting taper ^¬ piece as an abutment. This design of the retaining piece as a separate component allows optionally also equip a ^¬ OF INVENTION to the invention with conventional hose fittings. Preferably, the holding piece is formed on both sides in such a way that it can not be drawn into the tube in the axial direction of elastic elas ^¬ tical band by the taper of the connector, but can be pulled against the axial direction of pull out of the connector together with the attached elastic band from the hose , Thus, it can be achieved that after a material break of the elastic band, such as by material fatigue, by removing the tape remains the functionality of the hose for the passage of liquids is fully maintained. Preferably, the holding piece is shaped in such a way that it has at the second end region a further eyelet or a pin on which the holding piece can be gripped more easily. In an alternative embodiment of the hose according to the invention, the hose and / or the elastic tension band is divided and firmly connected at one or more points with the inner tube and / or the outer tube.

The hose according to the invention may comprise customary and USAGE ^¬ dung in household and garden suitable lengths. In the expanded state, it may preferably be 5-50 m, more preferably 7-30 m long.

The deployment pressure, ie the pressure at which the hose is substantially reached its full length can (at the current print üb ^¬ the connected fluid generally water serdruck) be adjusted. It may for example be between 1.5 and 5 bar, more preferably 2 and 3.5 bar. The compressive strength (burst pressure) of the hose may be with egg ^¬ ner safety margin above the maximum pressure of the fluid and is closed ^¬ for example, lie in the range of 10- 30 bar or 12-20 bar.

An embodiment of the invention will be explained below with reference to ^¬ the drawing. Show:

Fig. 1: A view of a hose according to the invention in the contracted state (storage condition);

Fig. 2: A view of a hose according to the invention in the expanded state (use state);

3 shows in an axial section the end region of a hose according to the invention with elastic band, connecting piece and retaining piece;

4 shows a perspective view of the axial section of FIG. 3.

In Fig. 1, the flexible outer shell 1 of the hose is shown contracted (unfolded). The liquid-tight inner tube is here flat connected to the outer shell 1 and not shown separately in the drawings. In this storage condition, the hose has a length which, in this embodiment, may be in the condition of use at about one quarter of the full length. At the ^¬ ends of the hose connectors 2 and 3 are ^¬ arranged. This is a female connector 2 and a male connector 3 in this embodiment. a typical garden hose can also be two female fittings.

To use the hose, the two connecting pieces 2 and 3 are each connected to a water connection on the one hand and a water consumer on the other hand. The valve of the water connection is opened and pressurizes the inside of the hose. This pressure expan ^¬ diert the hose against the restoring force of the elastic bands and brings it into the längenexpandierte shape which is shown in Fig. 2. In this state of use, the hose has about four times the length of the storage condition.

Fig. 3 shows schematically an axial section through an end portion of a hose according to the invention with the connection piece 2. The elastic band 7 is made in this ^exemplary embodiment from ^¬ latex and has a diameter of about 6 mm ^¬ on. At the end facing the connection piece 2, it forms a loop 8, which is secured against opening by means of a band or ring 9. The loop 8 passes through an eyelet 6 of a holding piece 4. This holding ^¬ piece 4 passes in the axial direction part of the connector 2 and has at its end away from the hose ^¬ th a crosspiece 5, the radial extent is greater than the free cross section of It can be seen that the retaining piece 4 can be inserted from the connection side of the An ^¬ final piece 2 in the axial direction until the crossbar 5 comes to rest on the shoulder 11 and the Halstück 4 axially against further shifting into the hose secures. In this way, the elastic return ^{¬ can} force of the band 7 on the holding piece 4 and the cross bar 5 on the shoulder 11 and thus on the connection piece 2 are transmitted. The design of the retaining piece 4 and the crosspiece 5 is chosen so that the flow of water through the connector 2 is not significantly hindered.

Claims

claims

Hose, with a flexible outer shell (1), marked by a in the interior of the hose ^¬ assigned elastic band (7), at least in the two end regions with the outer shell (1) and / or fittings (2, 3) of the hose tensile strength verbun is the.

Hose according to claim 1, characterized in that the elastic band (7) by a factor of 2 to 10, before ^¬ preferably 2 to 6, more preferably from 3 to 4 elas ^¬ table stretchable.

Hose according to claim 1 or 2, characterized in that the elastic band (7) has a restoring force of 15 to 100 N, preferably 20 to 80 N, more preferably 25 to 65 N. 4. Hose according to one of claims 1 to 3, characterized in that the material of the elastic band (7) is selected from the group consisting of elastomeric plastics and rubbers.

Hose according to claim 4, characterized in that said material is selected of the elastic band (7) consisting of latex and thermoplasti ^¬ rule elastomers from the group (TPE). 6. Hose according to one of claims 1 to 5, characterized in that the flexible outer shell (1) comprises a textile material. Hose according to claim 6, characterized in that it comprises a liquid-tight inner tube.

Hose according to claim 7, characterized in that the liquid-tight inner tube with the flexible outer shell (1) is connected flat.

Hose according to claim 6 or 7, characterized in that the liquid-tight inner tube comprises a PVC or PU material.

10. Hose according to one of claims 1 to 9, characterized in that the elastic band (7) is connected in each end region of the hose with a holding piece (4), wherein the holding piece (4) tensile with the connecting piece (2, 3) of the Hose is connected.

11 hose according to one of claims 1 to 10, characterized in that the preferably at least one retaining piece (4) is shaped such that it transmits the restoring force of the elastic band (7) on the An ^{¬ final} piece (2, 3) and against the axial Zu ^¬ grichtung the elastic band (7) from the connecting piece (2, 3) can be pulled out.

12 hose according to one of claims 1 to 11, characterized in that it is in the expanded state 5 to 50 m, preferably 7 to 30 m long.

13. Hose according to one of claims 1 to 12, characterized in that it has a deployment pressure of 1.5 to 5 bar, preferably 2 to 3.5 bar.