EP3254013A1

EP3254013A1 - Securing means for securing a corrugated hose to a sleeve

Info

Publication number: EP3254013A1
Application number: EP16700078.5A
Authority: EP
Inventors: Marcel Groen
Original assignee: Norma Germany GmbH
Current assignee: Norma Germany GmbH
Priority date: 2015-02-04
Filing date: 2016-01-07
Publication date: 2017-12-13
Also published as: DE102015101607B3; WO2016124350A1

Abstract

The invention relates to a securing means (1) for securing a corrugated hose (22) with a spiral-shaped structure to a sleeve. The securing means (1) should be designed as simply as possible and be producible in an inexpensive manner. For this purpose, the securing means (1) has a bridge element (2) which comprises at least one first foot (3) and a second foot (4) that can be inserted into adjacent valleys (27, 28) of the corrugated hose (22). The feet (3, 4) are connected to one another via a connecting bridge (6). A clamping or latching mechanism (12) is formed on the first foot (3) for receiving an end (23) of a clamping band (20) in a latching or clamping manner, and a stop (10) is formed on the second foot (4) for contacting a head (21) of the clamping band (20).

Description

Fastening means for securing a corrugated hose to a sleeve

The invention relates to a fastening means for fastening a corrugated hose with a spiral structure to a sleeve with the features of the preamble of claim 1.

Corrugated hoses, which are also called corrugated pipes, are used in particular in the field of heating, ventilation and air conditioning technology. The corrugated tubes have a more or less large diameter and are relatively elastic due to their structuring with mountains and valleys. The corrugated hoses are usually designed for this purpose with spiral waves, each with a mountain and a valley. There are also embodiments in which in the mountain of the corrugated tube, a reinforcing strip, such as a wire, runs in a spiral.

The connection of such corrugated hoses, for example, to air conditioners is usually carried out via tubular sleeves, over which one end of the corrugated tube is pushed. To secure the corrugated hose to the sleeve is then radially around the corrugated hose in the Muff a hose clamp arranged and tightened. In simple cases, the backup is done with a cable tie, which is placed over the end of the corrugated hose in the area of the sleeve and tightened. In corrugated hoses with a parallel structuring, ie parallel mountains and valleys, so that a sufficiently secure attachment is possible. In the case of corrugated hoses with a spiral structure in which the mountains and valleys run in a spiral, the problem arises that the fastening means must be guided from one valley at least over a mountain to the next valley, whereby an increased material load occurs during clamping of the fastening means in the area of the mountain and moreover, a secure fit of the corrugated hose to the sleeve can not always be guaranteed.

The invention is based on the object of specifying a fastening means with which corrugated tubes with a spiral structure can be fastened securely and with little effort to a sleeve. The fastener should be as inexpensive to produce and universally applicable.

This object is achieved by a fastening means having the features of claim 1. Advantageous embodiments can be found in the subclaims.

In a fastening means for securing a corrugated hose to a sleeve, it is provided according to the invention that the fastening means has a bridge element which comprises at least a first foot and a second foot, which can be positioned in adjacent valleys of the corrugated hose, wherein the feet are connected to one another via a connecting bridge and on the first Fu ß a clamping or locking mechanism for latching or clamping receiving a clamp band is formed and on the second Fu ß a stop for the installation of a head of the clamp band is arranged.

The clamp band can then be wrapped around the corrugated hose within a spiral-shaped valley, wherein the clamp band is closed and possibly tensioned via the fastening means or the bridge element. The connecting bridge thereby bridges a mountain of the corrugated hose located between the valleys, so that radially acting holding forces introduced into the corrugated hose by the fastening means with the clamp band act only in the region of the valley of the corrugated hose. By latching or clamping receiving the end of the clamp band, a diameter of the clamp Adjusted band and so a corresponding radial holding force can be introduced. By the stop on the second foot, the other end of the clamp band can be very simple and, for example, have only a corresponding thickening. In the simplest case, the stop may be formed as part of the connecting bridge.

The bridge element is preferably made in one piece with the feet and the connecting bridge, that can be produced with little effort. Furthermore, the bridge element with different clamp bands, which in particular have different lengths and / or widths and are thus suitable for different diameters of the corrugated tube, can be combined.

It is particularly preferred that on the second foot ß insertion opening is arranged for performing the clamp band. This results in a secure hold of the clamp band in the region of the head on the second Fu ß, the end of the clamp band is first passed through the insertion opening until the head comes to rest against the stop. In this case, the insertion opening is formed in particular within the stop.

In a particularly preferred embodiment, the bridge element has a third foot with a clamping or latching mechanism which can be inserted into a valley of the corrugated hose with a lower side and is connected to the second foot via a second connecting bridge. The first foot and the third foot are then constructed in the same way or in mirror image. In this case, a relatively large-scale investment in the corrugated hose is ensured by a total of three feet, so that a uniform application of force can be obtained. It is particularly preferred that the stop is formed by a connecting the first and the second connecting bridge web, wherein the insertion opening is formed between the web and the second foot. The bridge serves not only serve as a stop for the head of the clamp band, but are also used to stiffen the bridge element. Alternatively, axial Au ßenseiten the connecting bridges can come as a stop for the head of the clamp band used.

Preferably, the first foot and optionally the third foot have a greater axial extension than the second foot. This is sufficient for the design of the clamping or locking mechanism space on the first and the third Fu ß available. In addition, From a large-scale system is obtained, through which the bridge element can already be stored relatively stable on the corrugated hose during mounting.

The first foot and optionally the third foot preferably have a concave underside. The curvature of the underside may in particular be adapted to a radius of the sleeve, so that sharp edges, which could lead to damage of the corrugated hose, are avoided.

In a preferred embodiment, the bridge element is designed as a plastic part, in particular as an injection molded part. The bridge element can be made very stable and at the same time relatively easy. In particular, a polyamide such as nylon can be used as the material, which in particular has sufficient strength properties and resistance to different materials. In an alternative embodiment, the fastening means is formed of metal. This results in a particularly simple production as a press-stamped part. Such a fastener can be made relatively flat and so easily used even in cramped conditions. The latching mechanism preferably has at least one first feed-through opening for passing through one end of the clamp band and in particular a second feed-through opening aligned with the first feed-through opening, wherein the first feed-through opening is assigned a latching tongue. The latching tongue is in particular aligned so that a simple insertion of the clamp band is made possible, however, pulling out of the end of the Schel lenbandes is prevented by the latching tongue. This can be achieved in that the latching tongue is introduced in the insertion directions from above or from below to the clamp band, the latching tongue rests in particular with a certain bias on the clamp band. Through the passage opening results in a defined positioning of the end of the clamp band, whereby an even more stable alignment of the clamp band takes place by the provision of two through-openings.

In a preferred embodiment, the fastening means also comprises the clamp band, which optionally at its end detents, in particular in the form of transverse grooves and has at its head a counter-stop, which can be applied to the stop of the second foot. The head is formed in the simplest case as a thickening, which is greater than the stop of the second foot associated insertion opening, so that the head can not be pulled through the insertion opening. A tensioning of the clamp band then takes place simply by correspondingly far insertion of its end into the passage opening at the first or on the third Fu ß, where it is automatically held there on the locking mechanism. By providing a plurality of detents, in particular in the form of transverse grooves, a relatively fine adjustment is possible. It is particularly preferred that the clamp band made of plastic, in particular as a cable tie is formed. A plastic band clamp is usually relatively flexible and can absorb sufficient tensile forces, while it is relatively light. In the simplest case commercially available cable ties are used, the head is then used as a counter-stop and applied to the stop of the second foot, while the end is passed through the insertion opening and the passage openings. The latching mechanism of the first or third foot then interacts with the grooves formed at the end of the cable tie so that easy tensioning around the corrugated hose is possible. This represents a particularly cost-effective embodiment for the realization of the fastening means.

The invention will be described below with reference to preferred embodiments in conjunction with the drawings. Herein show:

Fig. 1 shows a fastening means of a first embodiment and

Fig. 2 shows a fastening means of a second embodiment and

Fig. 3 shows the fastener of Figure 2 in conjunction with a corrugated hose.

In Figure 1, a fastener 1 is shown with a bridge element 2, which is made of plastic. The bridge element 2 has a first foot 3, a second foot 4 and a third foot 5, wherein the first leg 3 is connected via a connecting bridge 6 to the second foot 4 and the third foot 5 via a further connecting bridge 7 also on the second foot Fu ß 4 is attached. The second foot 4 is thus located between the first foot 3 and the second foot 5, wherein all feet are in line. The connecting bridges 6, 7 are designed such that they can each bridge a mountain of a corrugated hose when the feet 3, 4, 5 rest in the valley of the corrugated hose on the corrugated hose. Optionally, only the first foot 3 and the third foot 5 rest on the corrugated hose, while the second foot 4 may optionally be positioned at a small distance from the corrugated hose.

A bottom 8 of the first Fu ßes 3 and a bottom 9 of the third Fu ßes 5 is concave in this case to obtain a flat contact with the corrugated tube, so that larger radial forces can be introduced without risking damage to the corrugated tube.

Above the second foot 4, the connecting bridges 6, 7 connected to each other via a web 10, which can represent a stop for a head, not shown, of a likewise not shown clamp band. In this case, the web 10 is spaced apart from the second foot 4 in such a way that an insertion opening 11 is formed between the second foot 4 and the web, through which the clamp band is pressed against the abutment of the head against a stop such as the web 10 or the outside the connecting bridges 6, 7 can be passed.

The first foot 3 and the second foot 5 have the same design and each have a latching mechanism 12, 13, each having a first through-opening 14, 15 and a second through-opening 16, 17. The first through-openings 14, 15 is in each case assigned a latching tongue 18, 19, which is applied from below to the end of the clamp band and with corresponding notches, which are formed at the end of the clamp band, cooperate, so as to cause a secure hold of the clamp band , In this case, the end of the clamp band is guided both by the first passage opening 14, 15 and by the second passage opening 16, 17 of the respective outer Fu ßes 3, 5, so that there is a secure positioning.

FIG. 2 shows an embodiment in which the bridge element 2 is made of metal. In this case, a clamp band 20 is passed through the insertion opening 1 1 of the bridge element 2 until a head 21 of the clamp band 20 abuts against an outer side of the connecting bridges 6, 7, thus representing a stop. In a smaller embodiment of the head 21, however, the head 21 can come to rest on the web 10, which then forms the corresponding stop. As clamp band 20, a commercially available plastic cable tie is used in this embodiment. Incidentally, the embodiment according to FIG. 2 corresponds to the exemplary embodiment according to FIG. 1, so that the description relating to FIG. 1 can be read in accordance with FIG. 2. Accordingly, the same reference numerals as in Figure 1 are used in Figure 2.

In Figure 3, the fastener 1 is shown mounted on a corrugated hose 22. The clamp band 20, which is again designed as a cable tie, is guided through the insertion opening 1 1 until the head 21 in the region of the second foot 4 for abutment with the stops forming a connecting bridges 6, 7 passes. One end 23 of the clamp band 20, however, is guided through the passage openings 14, 16 of the first Fu ßes 3, wherein the end is latched to the latching mechanism 12 of the first foot. Accordingly, a radial holding force is introduced into the corrugated tube by the clamp band 20 in conjunction with the bridge element 2, which together form the fastening means. In this case, the clamp band follows the spiral course of the valley or the valleys 27, 28, 29 of the corrugated tube, so that the holding force introduced by the attachment means 1 does not load the mountain or mountains 24, 25, 26 of the corrugated tube , This results in a tight, stable attachment of the corrugated hose to a sleeve.

Although in the present description of mountains and valleys is spoken, it is in a spiral-shaped structuring of the corrugated tube actually only a spiral running around the corrugated tube mountain with a spiraling valley, but this looks like a variety of mountains and valleys and is designated accordingly. The invention is not limited to one of the embodiments, but can be modified in many ways. Thus, for example, specially made clamp bands can be used instead of commercially available cable ties. Optionally, the bridge element can also be equipped with other feet, in which case also several clamp bands can be used or a particularly long clamp band is used, which is repeatedly guided around the corrugated tube. In this case, in each case by the bridge element, a compound is produced at the same circumferential height of the clamp band. Instead of an actual latching mechanism, a clamping mechanism with a clamping element can be used, which then makes the formation of latching means at the end of the clamp band, which is to be inserted into the latching or clamping mechanism, superfluous and holds this end by clamping. By fastening means according to the invention a very fast, secure fastening a corrugated hose to a sleeve, in particular a pipe sleeve, is possible, wherein the fastening means can be produced at very low cost and little effort. In this case, a pre-positioning of the fastening means on the corrugated tube is already possible by inserting the end of the clamp band in the locking mechanism of the first foot. The fastener must then be tightened after pushing the corrugated tube on the sleeve only by the end of the clamp band is further loaded with a tightening force. This results in contraction of the clamp band, being held by the latching mechanism in the contracted position in which it exerts radially inwardly acting holding forces on the corrugated tube and sleeve.

All features and advantages arising from the claims, the description and the drawing, including design details, spatial arrangements and method steps, can be essential to the invention, both individually and in the most diverse combinations.

Reference numeral

1 fastener

2 bridge element

3 feet

4 feet

5 feet

6 connecting bridge

7 connecting bridge

8 bottom

9 bottom

10 footbridge

1 1 through-hole

12 locking mechanism

13 locking mechanism

14 first passage opening

15 first passage opening

16 second passage opening

17 second passage opening

18 snap-in tongue

19 snap-in tongue

20 clamp band

21 head

22 corrugated tube

23 end

24 mountain

25 mountain

26 mountain

27 valley

28 valley

29 valley

Claims

claims

1 . A fastening means for securing a spiral-structured corrugated tube (22) to a sleeve having a bridge element (2) comprising at least a first leg (3) and a second leg (4) arranged in adjacent valleys (27, 28) the corrugated tube (22) can be inserted, wherein the feet (3, 4) via a connecting bridge (6) are interconnected and at the first Fu ß (3) a clamping or latching mechanism (12) for latching or clamping receiving an end (23 ) of a clamp band (20) and on the second foot (4) is formed a stop (10) for abutment of a head (21) of the clamp band (20).

2. Fastening means according to claim 1, characterized in that on the second foot (4) has an insertion opening (1 1) for passing the clamp band (20) is arranged.

3. Fastening means according to claim 1 or 2, characterized in that the bridge element (2) has a third foot ß (5) with a clamping or latching mechanism (13) in a valley (29) of the corrugated hose (20) with a Bottom (9) can be inserted and via a second connecting bridge (7) with the second Fu ß (4) is connected.

4. Fastening means according to claim 3, characterized in that the stop by a the first and the second connecting bridge (6, 7) connecting web (10) is formed, wherein the through opening (1 1) between the web (10) and the second Foot (4) is formed.

5. Fastening means according to one of the preceding claims, characterized in that the first foot (3) and optionally the third leg (5) have a greater axial Erstre- ckung than the second foot (4).

6. Fastening means according to one of the preceding claims, characterized in that the first foot (3) and optionally the third Fu ß (5) have a concave underside (8, 9).

7. Fastening means according to one of the preceding claims, characterized in that the bridge element (2) is designed as a plastic part, in particular as an injection molded part.

8. Fastening means according to one of claims 1 to 6, characterized in that the bridge element (2) is formed of metal.

9. Fastening means according to one of the preceding claims, characterized in that the clamping or latching mechanism (13) at least a first passage opening (15) for passing one end (23) of the clamp band (20) and in particular a second with the first passage opening (15 ) has aligned through opening (16), wherein optionally the first passage opening (15) is associated with a latching tongue.

10. Fastening means according to one of the preceding claims, characterized in that the fastening means (1) comprises the clamp band (20), which optionally at its end detents, in particular in the form of transverse grooves and at its head (21) has a counter-stop, which on the Stop (10) of the second foot (4) can be applied.

1 1. Fastening means according to one of the preceding claims, characterized in that the clamp band (20) made of plastic, in particular as a cable tie is formed.