CH714763B1 - soundproof curtain. - Google Patents

Abstract

The invention deals with improvements in the technical field of soundproof curtains and relates to a soundproof curtain (1) which has at least two curtain layers (2, 3, 4) hanging at a distance from one another, wherein between two curtain layers (2, 3, 4) hanging at a distance from one another an air cushion (8, 9) is formed in each case, which promotes the soundproofing effect of the soundproofing curtain.

Description

The invention relates to a soundproof curtain with at least two curtain layers.

[0002] Such soundproofing curtains are used to divide rooms into individual zones or sub-areas that are acoustically separate from one another, if necessary.

[0003] Soundproofing curtains previously used and known from practice have a large number of individual curtain layers, depending on the soundproofing effect they are intended to have. So-called reverberant curtain layers are often combined with so-called sound-absorbing curtain layers. Acoustically hard curtain layers are those curtain layers that have a high sound wave resistance compared to sound-absorbing curtain layers. In a reverberant medium or material from which these reverberant curtain layers may be made, a given sound pressure produces a smaller deflection than in a less reverberant material.

[0004] By combining a large number of curtain layers, the soundproofing effect of a soundproofing curtain can be increased. The more curtain layers are combined, the higher the soundproofing effect of the soundproof curtain as a whole. However, the total weight of the soundproof curtain increases with the number of curtain layers used. In addition, soundproofing curtains, which comprise a large number of individual curtain layers, are also more expensive and complex to manufacture and handle due to the greater use of material.

[0005] In particular, where particularly large soundproofing curtains are required to acoustically separate zones or sections of larger rooms from one another, this can pose a major problem. If, for example, the interior of an exhibition hall is to be divided into individual, acoustically separate zones using a soundproof curtain or several soundproof curtains, it is necessary to install very large soundproof curtains in the exhibition hall. If the soundproof curtains are to provide sufficient soundproofing, for example if different musical performances are to be performed in the acoustically separate zones, it is necessary with the previously known soundproof curtains to combine a large number of curtain layers with one another. However, this means that the soundproofing curtains suitable for this specific purpose are not only comparatively expensive, but also have a comparatively high basis weight, which can overload the existing support structures on which the soundproofing curtain is to be hung. In addition, the handling of such heavy soundproofing curtains is comparatively complex when they are assembled and dismantled, which in turn can impair rapid dismantling, conversion and reconstruction of the soundproofing curtains. This is felt to be disadvantageous, particularly in trade fair construction.

The object of the invention is therefore to provide a soundproof curtain of the type mentioned, with which the disadvantages outlined above can be avoided.

[0007] To solve this problem, a soundproofing curtain is proposed which has the means and features of claim 1 for protection. In particular, a soundproofing curtain of the type mentioned is proposed in which the curtain layers are suspended from separate rows of suspension points spaced apart from one another, so that two curtain layers of the soundproofing curtain hanging adjacent to one another are at a distance from one another and a sound-absorbing air cushion is formed between them.

The soundproof curtain according to the invention has the advantage that its at least two curtain layers are hung at a distance from one another in such a way that a defined, sound-absorbing air cushion can form between the curtain layers of the soundproof curtain. It has been found that a soundproofing curtain constructed in this way has a comparable soundproofing effect in relation to its weight per unit area as such soundproofing curtains which comprise a large number of curtain layers and are therefore significantly heavier. The soundproofing curtain according to the invention utilizes the finding that a phase transition of the sound waves from a first medium to a second medium has a relevant influence on the soundproofing. If a sound wave hits the soundproofing curtain according to the invention, it first enters one of the at least two curtain layers, passes through this curtain layer and then enters the air cushion from the curtain layer. Two phase transitions have already occurred here, which achieve a sound-insulating effect. After passing through the air cushion, a new phase transition of the sound wave is necessary so that it can enter the material of the at least one further curtain layer of the soundproofing curtain. If this at least one further curtain layer of the soundproofing curtain has also passed through, the sound wave must complete a new phase transition in order to pass from the at least one further curtain layer back into the air. Overall, a comparatively good soundproofing effect can be achieved with the soundproofing curtain with comparatively few curtain layers.

In comparison to previously known soundproof curtains, which have a similar soundproofing effect, a significantly lower use of material is necessary for the soundproof curtain according to the invention. This not only reduces the production costs, but above all also reduces the area weight of the soundproof curtain. This simplifies the handling of the soundproofing curtain according to the invention and makes it possible to equip particularly large rooms, such as exhibition halls, with such soundproofing curtains in order to subdivide them into individual, acoustically separate zones or partial areas.

Of the at least two curtain layers of the soundproofing curtain, at least one curtain layer can be a reverberant curtain layer and at least one other curtain layer can be a sound-absorbing curtain layer. The combination of reverberant, sound-reflecting curtain layers with sound-absorbing curtain layers has proven to be particularly effective in bringing about effective soundproofing.

In a particularly advantageous embodiment of the soundproofing curtain, it can be provided that it comprises at least three curtain layers and two air cushions formed between adjacent curtain layers hanging at a distance from one another. In this way, at least three curtain layers are combined with at least two air cushions, which, in view of the low cost of materials, enables particularly efficient soundproofing.

The structure of the soundproofing curtain can also provide that an inner or middle of the at least three curtain layers is a reverberant curtain layer. Two curtain layers hung adjacent to the inner or middle curtain layer can then advantageously be sound absorbing curtain layers. Sound waves that hit the central, hard curtain layer can be reflected and directed back to the sound-absorbing curtain layers. In this way, each sound wave that hits the soundproof curtain can be directed at least twice onto a sound-absorbing curtain layer; once when it enters the soundproof curtain and once after its reflection on the inner or middle reverberant curtain layer, when the sound wave hits the sound-absorbing curtain layer again before exiting the soundproof curtain. Overall, a very satisfactory soundproofing can be achieved with the soundproof curtain.

It can be expedient if at least one sound-absorbing curtain layer has a fold. This can mean that the at least one sound-absorbing curtain layer is hung with a drape. Such curtain layers, especially when they are sound-absorbing curtain layers, have an even better sound-insulating effect due to their folds.

It can also be expedient if the at least one reverberant curtain layer has a higher weight per unit area than the at least one sound-absorbing curtain layer.

The at least one sound-absorbing curtain layer can consist, for example, of a plastic, of a foam, of a foam plastic and/or of a textile fabric. Textile fabrics such as Molton, for example, can be used as textile fabrics. However, it is also possible for the at least one sound-absorbing curtain layer to comprise plastic, foam, foam plastic and/or a textile fabric, preferably a textile fabric such as Molton.

Molleton in particular has proven to be a particularly well-suited material for producing such sound-absorbing curtain layers. Molton can also be provided with a fold that improves the soundproofing effect of the soundproof curtain in a comparatively simple manner.

The at least one reverberant curtain layer of the soundproof curtain can expediently consist of a tarpaulin, a plastic tarpaulin, preferably a fibre-reinforced plastic tarpaulin and/or a fibre-reinforced composite material, or a tarpaulin, a plastic tarpaulin, preferably a fibre-reinforced plastic tarpaulin and/or a fibre-reinforced composite material include. Tarpaulins are used as reverberant curtain layers, which are also referred to in practice as truck tarpaulins, and are particularly suitable for large-area noise protection curtains. Such truck tarpaulins are not only extremely robust, but also easily and inexpensively available in large-area cuts.

It can be advantageous if the soundproofing curtain has a common support structure on which the spaced-apart rows of suspension points of the individual curtain layers are arranged or formed. In this way, the individual curtain layers of the soundproof curtain can be attached to the common supporting structure and the soundproof curtain can thus be prepared for its installation. A soundproofing curtain prepared in this way can thus be stowed in a suitcase or trolley case, for example, in order to be installed on site, for example in an exhibition hall, directly from the suitcase or trolley case. Separate handling of the individual curtain layers can be avoided in this way. Overall, the quick assembly and disassembly of the soundproof curtain directly on site is favored by the common supporting structure. This can be particularly advantageous, especially when soundproof curtains are to be installed and uninstalled within a very short time.

A traverse, for example, can serve as a common supporting structure. Traverses as common support structures have the advantage that they can be connected to one another comparatively easily. In this way, truss sections of any length composed of individual truss sections can be created. In order to divide a large room into zones that are acoustically separate from one another, several soundproof curtains can be connected to one another via their respective supporting structures. In this way, almost any size of modular soundproofing curtain can be produced from individual smaller soundproofing curtains without great effort. A so-called three-point traverse or a four-point traverse can be used particularly advantageously as the common supporting structure of the soundproofing curtain. Three-point trusses or four-point trusses are trusses that have three or four belts connected to one another. These straps of the truss are often in the form of strap tubes on which the individual curtain layers can be hung.

When using a three-point truss, ie such a truss that has three belts or chord tubes, exactly one curtain layer can be hung on each of the three belts of the three-point truss. Due to the existing distances between the individual straps of the traverse, the distances between the curtain layers then hanging at a distance and their rows of suspension points also automatically adjust, which favor the formation of the sound-insulating air cushions between the curtain layers.

Three curtain layers can be hung on the chords of such a three-point traverse, the cross section of which essentially corresponds to that of an isosceles triangle, in which the intersections of the longitudinal central axes of the chords with a cross-sectional plane of the traverse form the corner points of an isosceles triangle, so that two outer curtain layers and/or their rows of suspension points each have the same distance to a middle curtain layer and/or its row of suspension points. It can be favorable in this context if two of the three straps of the three-point crossbar are aligned in the position of use of the three-point crossbar such that their longitudinal center axes lie in a common plane which is aligned at right angles to the direction of gravity. In this way, one of the three straps then hangs vertically below the common plane. A middle of three curtain layers of the soundproof curtain can be hung on this lower belt. The row of suspension points of the middle curtain layer can thus be at the same distance from the two rows of suspension points of the two outer curtain layers arranged adjacent to it. This has the effect that the middle of the three curtain layers have approximately the same middle distance to the two surrounding curtain layers hanging on the outer belts of the truss arranged above. In this way, air cushions of the soundproofing curtain can be provided which essentially have the same thickness or the same volume.

It can also be advantageous if the common support structure on which the spaced rows of suspension points are arranged or formed has at least one fastening means on which the common support structure can be hung in a room, for example in an exhibition hall. For example, an eyelet, a loop or also a hook can serve as at least one fastening means. It is particularly expedient if the at least one fastening means is arranged or formed on an outside or upper side of the common support structure facing away from the at least two curtain layers of the soundproofing curtain.

In order to facilitate opening or closing of the soundproofing curtain, it can be expedient if the suspension points can be displaced along their row, in particular along a belt of a truss which serves as a common supporting structure.

In order to create a sufficiently large or thick air cushion between two adjacent curtain layers of the soundproofing curtain, it can be advantageous if there is a distance, in particular an average distance, between two curtain layers hanging adjacent to one another or between two rows of suspension points of two curtain layers arranged adjacent to one another at least two, three or four and/or at most four to 15 centimeters. A distance between two rows of suspension points arranged adjacent to one another for curtain layers of the soundproof curtain hanging adjacent to one another that is between three and six centimeters, preferably about four centimeters, has proven to be particularly suitable.

A particular advantage of the soundproofing curtain according to the invention and described above with regard to its advantageous embodiments can also be seen in its positive fire-retardant properties. In the event area in particular, the materials used must be able to meet comparatively high fire protection requirements. In the case of multi-layer soundproofing curtains, as are already known from practice, the individual curtain layers of these soundproofing curtains must each have certain positive fire protection properties or fire-retardant properties in order to meet the required fire protection requirements.

In the case of the previously known from the prior art and in practice soundproof curtains, however, it is the case that a large number of different curtain layers are combined with one another in such a way that they contact one another directly, ie form a compact composite. In comparison to the incendiary mass provided by a single curtain layer, the total incendiary mass provided by the composite comprising a multiplicity of curtain layers is correspondingly higher. Experiments have now shown that such a compact combination of curtain layers, whose total fire mass is comparatively large, cannot always meet the set fire protection requirements. This is despite the fact that the individual curtain layers still meet the fire protection requirements placed on them. The fire-retardant effect of the individual curtain layers can therefore be impaired by the combination of several such curtain layers.

In the soundproof curtain according to the invention, the fire-retardant effect of each of the at least two curtain layers is maintained due to the distance between the two curtain layers. Due to its comparatively small surface weight, the soundproofing curtain can have better fire protection properties than conventional multi-layer soundproofing curtains, as they are known from practice, with a comparable or even better soundproofing effect. Due to the spaced suspension of the individual curtain layers of the soundproofing curtain according to the invention, this can also meet the requirements of a higher fire protection class as a loose combination of several curtain layers or develop a better fire-retardant effect than the soundproofing curtains with similar soundproofing properties previously known from the prior art and in practice.

An embodiment of the invention is now described in more detail with reference to the drawing. It shows in a partly highly schematic representation: Figure 1 a perspective representation of a soundproofing curtain with a total of three curtain layers suspended at a distance from one another on a common support structure, Figure 2 a perspective end view of the soundproofing curtain shown in Figure 1, with two outer curtain layers each provided with a drape made of a sound-absorbing material and a curtain layer made of a reverberant material suspended between them can be seen, and FIG. 3 shows a perspective side view of the soundproofing curtain shown in FIGS.

Figures 1 to 3 show a designated as a whole with 1 soundproof curtain. This soundproof curtain 1 comprises a total of three curtain layers 2, 3 and 4. The curtain layers 2, 3 and 4 are each suspended from separate, spaced-apart rows 5, 6 and 7 of suspension points, so that two curtain layers 2, 3, 4 hanging adjacent to one another have a Have a distance to each other and between them a sound-absorbing air cushion 8 or 9 is formed.

The two outer curtain layers 2 and 4 are so-called sound-absorbing curtain layers, which are made of a material that has sound-absorbing properties. The middle curtain layer 3 of the total of three curtain layers 2, 3 and 4 of the soundproofing curtain 1 is a reverberant curtain layer which, due to its properties, can have a sound-reflecting effect. One of the two air cushions 8 , 9 is formed between each two of the total of three curtain layers 2 , 3 , 4 of the sound insulation curtain 1 .

The inner or middle curtain layer 3 of the total of three curtain layers 2, 3 and 4 is a reverberant curtain layer 3, while the two curtain layers 2 and 4 surrounding the reverberant curtain layer 3, which are suspended adjacent to the inner or middle curtain layer 3, are sound-absorbing curtain layers.

As illustrated in particular in FIG. 2, the two sound-absorbing, outer curtain layers 2, 4 are provided with a drape. This fold favors the soundproofing effect of the soundproof curtain 1.

The inner, reverberant curtain layer 3 has a higher basis weight than the two outer, sound-absorbing curtain layers 2 and 4. The two sound-absorbing curtain layers 2 and 4 of the soundproofing curtain 1 consist of a textile fabric, in particular a textile fabric such as molleton.

consists of a fiber-reinforced plastic tarpaulin, which is also referred to as truck tarpaulin.

The total of three curtain layers 2, 3 and 4 of the soundproofing curtain 1 are suspended from a common supporting structure 10 of the soundproofing curtain 1. The mutually spaced rows 5, 6 and 7 of suspension points for the individual curtain layers 2, 3 and 4 are arranged or formed on the common supporting structure 10.

The common support structure 10 of the soundproofing curtain is a three-point traverse, which has three spaced apart and parallel belts 11. In each case one of the three rows 5, 6 and 7 of suspension points for the individual curtain layers 2, 3 and 4 is arranged or formed on one of the belts 11 of the traverse 10 in each case. Fastening means, for example eyelets, loops or hooks, can be arranged on an upper side 12 of the traverse 10, with the aid of which the supporting structure 10 can be hung up in a room together with the three curtain layers 2, 3 and 4 fixed to it.

The three-point traverse 10 shown in the figures has a cross-section which essentially corresponds to that of an isosceles triangle. This means that intersections of longitudinal center axes of the chords 11 of the three-point traverse 10 with a cross-sectional plane of the traverse 10 form corner points of an isosceles triangle. The three curtain layers 2, 3 and 4 are suspended from this three-point traverse 10 in such a way that the two outer curtain layers 2 and 4 or the rows 5 and 7 of suspension points of these curtain layers 2 and 4 are each the same distance from the middle curtain layer 3 or from its Have row 6 of suspension points. The two upper straps 11a and 11b of the three straps 11 of the three-point crossbar 10 are aligned in the position of use of the three-point crossbar 10 such that their longitudinal center axes lie in a common plane which is aligned at right angles to the direction of gravity. In this way, a lower chord 11c of the three chords 11 then hangs perpendicularly below the common plane. The middle curtain layer 3 of the three curtain layers 2, 3, 4 of the soundproofing curtain 1 can be hung on this lower belt 11c. The middle curtain layer 3 of the three curtain layers 2, 3, 4 or its row 6 of suspension points then has curtain layers 2 and 4 or to the rows 5 and 7 of suspension points of these curtain layers 2 and 4 the same distance. The two air cushions 8 and 9 of the soundproofing curtain 1 have essentially the same thickness or the same volume.

In an embodiment of the soundproofing curtain 1 not shown in the figures, the individual suspension points can be displaceable along their respective row 5, 6 or 7, in particular along a belt 11 of a traverse 10. For example, it is possible to arrange individual suspension points on carriages or slides that can be displaced in or on a guide groove. In this way, such a soundproof curtain 1 can be opened and closed again comparatively easily by the individual curtain layers 2, 3 and 4 being displaced along the rows 5, 6 and 7 of suspension points.

In the embodiment of the soundproofing curtain 1 shown in the figures, a distance between two curtain layers 2, 3 and 4 hung adjacent to one another and thus between two rows 5, 6 and 7 arranged adjacent to one another of suspension points is approximately four centimeters. As a result, the air cushions 8 and 9 that form between the one outer curtain layer 2 and the middle curtain layer 3 or between the other outer curtain layer 4 and the middle curtain layer 3 have an average thickness of about four centimeters. Air cushions 8 and 9 dimensioned in this way have proven to be satisfactorily soundproofing.

The invention deals with improvements in the technical field of soundproof curtains. In this context, a soundproofing curtain 1 is proposed which has at least two curtain layers 2, 3 or 4 hanging at a distance from one another, with an air cushion 8, 9 being formed between two curtain layers 2, 3, 4 hanging at a distance from one another, which increases the soundproofing effect of the soundproofing curtain favored.

reference list

1 soundproof curtain 2 outer curtain layer 3 middle curtain layer 4 outer curtain layer 5 row of suspension points of 2 6 row of suspension points of 3 7 row of suspension points of 4 8 air cushions 9 air cushions 10 supporting structure/traverse 11 straps 11a upper strap 11b upper strap 11c lower Strap 12 top of 10

Claims (10)

A soundproof curtain (1) with at least two curtain layers (2,3,4), characterized in that the curtain layers (2,3,4) are suspended from separate, spaced rows (5,6,7) of suspension points, so that two curtain layers (2,3,4) hanging adjacent to one another are spaced apart and a sound-absorbing air cushion (8,9) is formed between them. 2. Soundproof curtain (1) according to claim 1, characterized in that of the at least two curtain layers (2,3,4) at least one curtain layer (3) has a reverberant curtain layer (3) and at least one other curtain layer (2,4) has a sound-absorbing curtain layer (2,4) and/or that the soundproofing curtain (1) has at least three curtain layers (2,3,4) and two air cushions (8,9) formed between adjacent curtain layers (2,3,4) hanging at a distance from one another preferably wherein an inner or middle of the at least three curtain layers (2,3,4) is a reverberant curtain layer (3) and/or two curtain layers (2,4) suspended adjacent to the inner or middle curtain layer (3). , Sound-absorbing curtain layers (2.4) are. 3. Soundproof curtain (1) according to claim 1 or 2, characterized in that at least one sound-absorbing curtain layer (2,4) has a drape. 4. Soundproofing curtain (1) according to one of claims 2 to 3, characterized in that the at least one reverberant curtain layer (3) has a higher basis weight than the at least one sound-absorbing curtain layer (2,4). 5. Soundproof curtain (1) according to one of claims 2 to 4, characterized in that the at least one sound-absorbing curtain layer (2,4) consists of a plastic, a foam, a foam plastic and/or a textile fabric, preferably a Textile fabric such as Molton, or plastic, foam, foam plastic and / or a textile fabric, preferably textile fabric such as Molton, comprises. 6. Soundproof curtain (1) according to one of claims 2 to 5, characterized in that the at least one reverberant curtain layer (3) consists of a tarpaulin, a plastic tarpaulin, preferably a fibre-reinforced plastic tarpaulin and/or a fibre-reinforced composite material or a tarpaulin a plastic tarpaulin, preferably a fibre-reinforced plastic tarpaulin and/or a fibre-reinforced composite material. 7. Soundproof curtain (1) according to one of claims 1 to 6, characterized in that the soundproof curtain (1) has a common support structure (10) on which the spaced rows (5,6,7) of suspension points are arranged or formed . 8. Soundproof curtain (1) according to claim 7, characterized in that the common supporting structure (10) is a crossbeam, preferably a three-point crossbeam or a four-point crossbeam, in particular with each row (5,6,7) of suspension points on one belt (11 ) of the traverse (10) is arranged or formed, and/or that the common support structure (10) has at least one fastening means, for example an eyelet and/or a loop and/or a hook. 9. Soundproof curtain (1) according to one of claims 1 to 8, characterized in that the suspension points are displaceable along their row (5,6,7), in particular along a belt (11) of a traverse (10). 10. Soundproof curtain (1) according to one of Claims 1 to 9, characterized in that a distance, in particular an average distance, between two curtain layers (2, 3, 4) hanging adjacent to one another and/or between two rows (5 ,6,7) of suspension points is at least two, three or four and/or at most four to 15 centimeters.