EP2013860A1

EP2013860A1 - Lighting element

Info

Publication number: EP2013860A1
Application number: EP07722309A
Authority: EP
Inventors: Jürgen Dipl.-Ing. Nölle
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-04-28
Filing date: 2007-04-26
Publication date: 2009-01-14
Anticipated expiration: 2027-04-26
Also published as: DE502007005762D1; ATE489700T1; EP2013860B1; DE112007001667A5; DE202006007058U1; WO2007124724A1

Abstract

The invention relates to a lighting element (1), especially for advertising purposes, as a warning light, or for illuminating, comprising an at least partially light-permeable illumination area (4) which is retained by at least one clamping element (12, 13) and is provided with at least one illuminant (34). In order to create a lighting element (1) that is easy to transport, can be used for advertising purposes, for example, and is also suited to illuminate rooms or open-air grounds, the illumination area (4) is retained by at least two clamping elements (12, 13) along an axis of symmetry and can be reversibly moved from an unclamped position into a clamped position. Said embodiment ensures that the lighting element (1) can be converted into a compact shape and is therefore easy to transport while a relatively large lighting element that is noticeable and can be equipped with special advertising measures is created after bracing the utilized clamping elements (12, 13). The inventive lighting element (1) is easy to transport, can be assembled quickly, and can thus be displaced and be moved to a different location anytime.

Description

lighting element

The invention relates to a lighting element, in particular for advertising purposes, as a warning light or for illumination, consisting of an at least partially translucent illumination surface which is held by at least one clamping element and has at least one light source.

Lighting elements with a partially translucent lighting surface are known for example as ceiling or wall elements and consist mainly of a body in which, for example, translucent glass or plastic plates are inserted. Behind the glass or plastic plates, plastic films or membranes is at least one light source, which is concealed and not visible to a viewer from the outside. The light generated by the light source is scattered by the glass or plastic plates, as far as a clouding, multiple times, so that a pleasant diffused light is produced, which in addition leads to a complete uniform illumination of the illumination surface with a corresponding number of light sources. Alternatively, it is known from the prior art to use translucent films instead of glass or plastic plates, which have the advantage of high elasticity and consequently lighting elements can be produced with a body which, depending on the shape, is suitable for clamping the films used.

The present invention has for its object to provide an individual lighting element, which can be used for example for promotional purposes and has a simple modular structure.

According to the invention the object is achieved in that the illumination surface is held along an axis of symmetry by at least two clamping elements and is reversibly convertible from a relaxed position to a cocked position.

Further advantageous embodiments of the invention will become apparent from the dependent claims. The lighting elements according to the invention are characterized in that at least two clamping elements are arranged along an axis of symmetry, which are used for clamping the intended illumination surface. These clamping elements may for example consist of two identical or approximately identical elements. But there is also the possibility that a clamping element is designed as a stationary device, for example as a foundation, while the second clamping element is arranged to be movable relative to this first clamping element. Here, the assembly and disassembly as lighting element should be as easy as possible to handle. For this purpose, the two clamping element can be transferred from a cocked position to a relaxed position and vice versa. Between the clamping elements in this case the illumination surface is arranged, which is usually formed as an elastic material and thus leads in the cocked position to a smooth outer surface, which is determined by the shape of the clamping means. Preferably, it is round clamping means, so that the lighting element takes the form of a Litfasssäule. In the relaxed position, the illumination surface between the clamping elements, which form a suitable cavity for this purpose is added, so that the lighting element can be transported very easily. The tensioning elements provided according to the invention in this case generate a tension in the longitudinal direction of the axis of symmetry and at right angles thereto, so that the illumination surface is completely taut and forms the outer shell of the lighting element without wrinkling.

Preferably, the lighting element is provided for advertising purposes with a corresponding imprint or as a warning light, but can of course be used without problems for the illumination of premises or an outdoor area, for example at a garden party.

In a preferred embodiment, the upper clamping element is designed as a clamping plate or equipped with an additional clamping plate, as well as the lower clamping element is designed as a clamping plate or has a clamping plate, with the alternative also the possibility that a fixed base can be used, if provided Lighting elements are provided for a stationary continuous use. The fixed pedestal can either be weighted or anchored, so that even larger lighting elements are not overturned by a gust of wind.

In a particular embodiment, it is provided that the clamping elements are joined together to form a cup-shaped case, wherein a case member forms the upper and a case member the lower clamping plate or has such, which additionally include a cavity, which for receiving the bulbs, any ballasts and as well the illumination surface is provided. For this purpose, the elastic material of the illumination surface can be folded and compressed in the cavity.

Preferably, in the case of the suitcase shape, the clamping elements are each formed in two parts and consist of an outer shell-like case member and an inner clamping plate, wherein between the case member and the clamping plate a circumferential slot guide is formed, which either forms a clamping surface or has a clamping recess. In the clamping recess, for example, a thickened edge of the illumination surface, that is the elastic material, are clamped. For this purpose, the elastic material is provided for example at the top and bottom with a peripheral edge, which can be sewn end. In addition, the elastic material is sewn along the axis of symmetry at least once, so that a hose is formed.

The two clamping plates have at the edge a converging curvature, against which the illumination surface is applied for clamping. Because it is preferably round clamping plates, the curvature extends over the entire circumference of the clamping plate and thus leads to the illumination surface, that is to say the elastic material, lying close to the curvature. By further aids, which are required for pushing apart of the two clamping plate or the case elements with the clamping plates, thus a tensile force is transmitted to the illumination surface, which creates a voltage that ensures that the lighting surface wrinkle-free and completely smooth according to the predetermined shape the clamping plate is formed. The two clamping elements can be pressed apart by a spring mechanism along the axis of symmetry or have a central recess, wherein the upper clamping element has an outwardly closed stepped bore, while the lower clamping element has an outwardly open recess through which a voltage-generating means, for example a Fiberglass rod, is inserted and by a locking element, for example, a cotter pin, can be fixed. With the help of the fiberglass rod, which may also be other materials, the upper clamping plate is lifted through the lower recess, namely, until the illumination surface is sufficiently tensioned. Following this, the voltage-generating means is determined by means of the locking element, so that both the upper and the lower case element remains together with the tension plates at a predetermined distance and braces the illumination surface.

In an alternative embodiment of the lighting element, a clamping element is provided which has for clamping the lighting surface, for example, an upper steel strip and optionally a lower steel band as a clamping element between which the illumination surface is spanned, wherein the lower steel strip is received either in a fixed base or the illumination surface is clamped or otherwise held within the base, so that only the upper steel strip is used for mounting the illumination surface. The steel bands or the upper steel band can be held by a tensioning device, which allows an axial displacement along the axis of symmetry.

Furthermore, there is the possibility that further steel strips are used in the middle region, which in the embodiment of the invention have a larger dimension than the lower and upper steel strips, so that an approximately spherical or cambered shape is formed.

The steel strips themselves, like the clamping plates, may be of circular design in a first embodiment, so that the illumination device is in the form of a advertising pillar. However, there is also the possibility that the steel bands or clamping plates are used in a polygonal embodiment come so that several flat faces are merged into a circular shape or give a polygonal shape. The steel bands or clamping plates are held by the centrally arranged clamping device, which consists for example of a square tube or round tube and is secured within the base or alternatively, a glass fiber rod is used in the first embodiment, along which axis of symmetry, the steel bands or clamping plate arranged displaceable or movable could be.

As far as the lighting element is placed on a solid base, preferably a bracing with at least one upper steel strip. However, there is the possibility that both the upper and the lower steel strip are acted upon in the opposite direction by spring action in order to achieve a tension of the illumination surface. Alternatively, it is possible to provide the clamping device end additionally with threaded rods to which the steel bands are attached to allow by turning the existing threaded rods post-tensioning. In the second embodiment, however, the steel strips are preferably pressed apart by a spring mechanism along the axis of symmetry, so that an automatic re-tensioning of the illumination surface in the event of yielding is ensured. The required lighting means may in this case preferably be fastened along the clamping device in the second embodiment variant, and indeed these may be accommodated within the clamping device or fastened thereto. In the first embodiment, the bulbs are preferably attached to the clamping plates in the lower and possibly also in the upper area including the necessary ballasts and the like.

The second embodiment of the lighting element takes the form of a Litfasssäule with a cylindrical base body, which merges into a bottom foundation at the end and in the upper area can be additionally closed by a hood or a conical cut of the illumination surface. The upper area could for example be covered by a hood to additionally allow rain protection. In a further embodiment, the advertising column can also be designed to be collapsible or compressible, at least in some areas, so that there is a transportable design that can be installed at different locations. For this it is necessary inter alia that the illumination surface consists of an elastic material, so that a folding of the illumination element is made possible.

The use of the illumination surface made of an elastic material applies to both the first and the second embodiment, wherein in the first embodiment, the illumination surface is received in the cavity of the two case elements.

The elastic material may for example consist of a fabric, a fabric film or other resilient material. The elastic material may itself be translucent and printed with advertising motifs. Alternatively, there is the possibility that the elastic material is transparent or crystal clear and is provided on the inside with a printed translucent film, which is either by its own clamping force close to the elastic material or biased accordingly or glued to this material. The lighting element itself is designed to be telescoping or compressible and thus easy to transport, wherein the elastic material and optionally additionally used translucent film is also formed foldable.

In a further advantageous embodiment of the invention, a pneumatic or hydraulically movable clamping device is used to aufzuspannen the lighting element.

In a particular embodiment of the invention, the central tensioning element is a rubber bellows. A rubber bellows allows a completely flat storage of the lighting fixture in the unfolded state. Suitable rubber bellows is an accordion-shaped bellows, but also a balloon-like body which has an optionally textile-reinforced shell and can be pressurized. In a very special embodiment of the invention, the lighting fixture is so designed such that at least the clamping element and optionally also all other elements which serve for clamping, consist of an inflatable body. In this way, the lighting fixture can be stored in a flat case, in which there is additionally a compressor for inflating the inflatable tensioning body.

In a preferred embodiment, the case is configured from the outside with suction cups, which allows mounting on smooth surfaces. This embodiment is suitable for space-saving carrying in the trunk of a car. If necessary, the case is tacked with its outer Saugnäpfen to an outer windshield of the vehicle and connected with a power cable to the electrical system. The opened case then serves as a fixture and as a support plate for the lighting fixture. When switched on, the compressor inflates the lighting fixture and after the lighting fixture is erected, the lighting fixture can be switched on so that it floods its surroundings with light. As far as an inflatable tensioning body and a compressor are dispensed with, a similar use can be provided using, for example, the first embodiment variant, wherein the required tension is used by a fiberglass rod or similar materials between the case elements and the tensioning plates. In these embodiments, the lighting means in the lighting fixture are arranged in a cage for protecting the direct contact of the lighting means with the rubber bellows or the lighting surface. When using a compressor, the air can be released again by switching off the compressor or by manual actuation of an exhaust valve and the lighting fixture can be accommodated in the trunk to save space. This special design of the lighting element is reminiscent of a "Jack-In-A-Box", wherein the lighting fixture is made of flexible materials and can be accommodated in a folded manner in the case.With the opening of the case, the lighting means unfolds, wherein the clamping elements are inflated. Of course, the heat of the light directly exposed installation materials made of metal, ceramic or plastic.

The invention will be explained again below with reference to FIGS. It shows

1 is a side view of an inventive lighting element after completion of construction in a usable state,

2 in a sectional side view of the lighting element of Figure 1,

Fig. 3 in a plan view and a sectional side view of the lighting element of Figure 1 in a compact assembled form after disassembly and

4 shows a side view of a further embodiment of the lighting element according to the present invention.

Figure 1 shows a side view of an inventive lighting element 1 in a first embodiment, which is very similar to a Litfasssäule, with an upper cover 2 and a lower cover 3, the illumination surface 4 limit. Between the two covers 2, 3, the illumination surface 4 is formed, which may for example consist of a fabric, a fabric film and in particular of an elastic material. The material used here is translucent and may additionally be printed to use, for example, the lighting element 1 for advertising purposes. Due to the translucency of the material used for the illumination surface 4, an insight into the illumination element 1 from the outside is not possible.

FIG. 2 shows, in a sectional view, the lighting element 1 known from FIG. 1, it being clear from the sectional illustration how a tensioning of the lighting surface 4 takes place and the construction of the upper and lower cover 2, 3 is constructed. The two covers 2, 3 consist in the illustrated embodiment of an outer shell-shaped case member 10, 11 and an inner clamping plate 12, 13. The case members 10, 11 are screwed by screws 14 to the clamping plate, so that they form a unit. To bear the clamping plate 12, 13 to the case elements 10, 11, these each have a recess 15, which is trapezoidal and forms a contact surface 16, against which the clamping plate 12, 13. The case elements 10, 11 are equipped with a nearly right angle bent edge portion 17, which merges in the upper case member in a tapered portion 18, while the lower case member a recess 19 is formed, so that after joining the upper and lower case member 10, 11 the portion 18 engages in the recess 19 and the two case elements 10, 11 completely closes. Both case elements 10, 11 have a central Anformung 20, 21, wherein the upper Anformung 20 has a stepped bore 22 which is closed to the outside by a cover 23. The Anformung 21 of the lower case member 11, however, has an opening 24 so that from below a voltage-generating means, in the present case a fiberglass rod 25, can be inserted. The fiberglass rod 25 is formed in the present case, for example, in three parts and each has a transition sleeve 26, so that different fiberglass rods can be inserted into each other. Of course, a one-piece fiberglass rod can be used. The upper end 27 of the fiberglass rod engages in the stepped bore 22 and lies with the transition sleeve 26 in the larger portion of the stepped bore 22, while the lower end 28 is passed through the opening 24 of the case member 11 and thus for pressing apart of the two case elements 10, 11 can be used. By fixing the lower fiberglass end 28 in the opening 24, for example by a splint or the like, it is ensured that due to the tensile stress occurring through the illumination surface 4 of the fiberglass rod 25 is not pushed out of the opening 24 again. The sapwood used in this case abuts on an abutment shoulder of the case element 11, so that a tension can be carried out with the aid of the fiberglass rod 25 or similar materials. By the pressure exerted on the case elements 10, 11 this is on the illumination surface 4, which may be formed in the form of, for example, a translucent and elastic material, transmitted and generates a bias in the direction of the axis of symmetry, so that the illumination surface can be stretched wrinkle-free. The voltage of the illumination surface is essentially achieved by clamping the elastic material, the tissue band or the tissue film in a slot guide 30. The slot guide 30 is formed by a corresponding shaping of the upper and lower case member 10, 11 and the clamping plate 12, 13, wherein an entrapment of the respective End of the illumination surface in this slot guide 30 takes place. For this purpose, for example, the film used may have an edge thickening 31, which is received and clamped in a corresponding recess 32, so that as a result of the tensile force generated by the fiberglass rod 25, a tension of the film takes place. For this purpose, the clamping plate is provided at the edge with a curvature 33 around which the elastic material, or the tissue or the tissue film is pulled around. By this shaping in particular the necessary voltage is generated because the material of the illumination surface 4 is guided around the curved edge 33 of the clamping plate 12, 13 over 360 degrees and clamped. In the present embodiment, the illumination surface 4 or elastic film is indicated by a dash-dot line and protrudes with the respective ends to the slot guide 30 and with a thickening 31 is a deadlock between the clamping plates 12, 13 and the case elements 10, eleventh

By this measure, a firm connection between the lighting surface 4 and the case member 10, 11 and the clamping plate 12, 13 is produced, which are stowed within the case during assembly of the two case elements 10, 11 due to the existing elasticity and the foldability of the materials used can.

In addition, the lower clamping plate 13 is provided with at least one illumination means 34, however, a plurality of illumination means may be provided both in the upper and in the lower region in order to achieve sufficient illumination of the illumination surface 4. By using the translucent material, it is ensured that even with a one-sided positioning of the lighting means 34, a good and uniform light distribution takes place.

FIG. 3 shows, in a top view and in a sectional side view, the two case elements 10, 11 with the tensioning plates 12, 13 after joining the two case elements 10, 11. A cavity 40 between the two tensioning elements 12, 13 is sufficient for illuminating means 34 and another ballast 35 and the material of the illumination surface 4 record. It is very clear from this enlarged view that the clamping plates 12, 13 have a curvature 33 over which the elastic material of the illumination surface 4 is pulled and is strained. For a better overview was dispensed with a representation of the elastic material. The entrapment of the illumination surface takes place here in the recess 32, in which, for example, an edge-side piping of the illumination surface can be clamped. The provided for bracing the two case elements 10, 11 fiberglass rod 25 is not included in this illustration, however, the average Anformung 21 of the lower case shell 11 clearly refer to the opening 24 into which the fiberglass rod is inserted. In contrast, the upper case shell 10 has a central Anformung 20, with a stepped bore 22 and an upper cap 23 which closes the breakthrough, is equipped. The stepped bore 22, which has a larger diameter in the front region, serves to receive and support the central formation 21 after the merging of the two case elements 10, 11 and at the same time for conditioning and receiving the transition sleeve 26 of the fiberglass rod 25 after the construction to this centric to position and hold. Preferably, for the case members 10, 11 and the clamping plates 12, 13, a light metal, for example aluminum or a plastic used, so that the fiberglass rod used can absorb the loads.

From the plan view, the upper shape of the case member 10 with the mounting screws 14 can be seen and the cover 23 and the central centric Anformung 20, which merges trapezoidal in the upper region in a trough 36, wherein the bottom portion of the trough at the same time as a contact surface for the clamping plate 12, 13 serves.

Figure 4 shows a lighting element 100, which rests on an existing base 101 and spans an illumination surface 102 by clamping elements. The illumination surface 102 preferably consists of an elastic translucent or transparent material, wherein in the case of a translucent material, this may additionally be printed with advertising motifs, while in the case of a transparent elastic material this is additionally provided on the inside with a printed translucent film. The printed translucent film can in this case rest directly on the elastic material or be glued to it by its inherent tension. The tensioning element consists of an upper and lower steel belt 104, 105, which are executed round and each equipped with three struts 106. With the help of the struts 106, a central center is formed, so that the steel strips 104, 105 can be positioned along an axis of symmetry. In the illustrated embodiment, the clamping device consists of an angle section 107, from which at both ends a threaded rod 108 emerges, which is provided for attachment of the steel strips 104, 105 with struts 106. The clamping device 107 is equipped with lighting means 109, which are integrated in the embodiment shown within the clamping device 107. Alternatively, there is the possibility that the lighting means 109, namely several are fastened to the clamping device 107 in flipped position. It is in the illustrated embodiment, two bulbs 109, the number of bulbs 109 is irrelevant to the invention and can be arbitrarily increased. The threaded rod 108 projects beyond the steel bands 104, 105 in the upper and lower regions, so that a conical shape of the illumination surface 102 is present both in the lower and in the upper region. In addition, the upper portion could be provided with a metallic or plastic cover, so that at the same time there is a rain cover.

The lighting element 100 rests on a base 101, which consists for example of a concrete ring and can either be placed on a floor or embedded in this. Through a recess 111 of the concrete ring there is the possibility that the entire lighting element 100 is inserted in the concrete ring, wherein the lower steel strip 105 comes to lie within the recess. This ensures that a solid attachment is present and the lighting element 100 has sufficient stability.

A supply of the lighting means 109 is effected by a supply in the bottom region of the base 101, wherein optionally ballasts or transformers can be arranged within the base 101.

In a further embodiment, such a lighting element 100 may be equipped with further steel strips, which optionally have a larger diameter in the middle region, so that a bulbous to convex shape of the lighting element 100 is formed. In this case there is the additional possibility that the upper half, for example, is made of a non-translucent material, preferably reflective material, while the lower half of the illumination surface consists of a translucent or transparent material and thus the light is emitted substantially downwards.

LIST OF REFERENCE NUMBERS

1 lighting element

2 cover

3 cover

4 lighting area

10 case element

11 case element

12 clamping plates

13 clamping plates

14 screw

15 deepening

16 contact surface

17 border area

18 section

19 recess

20 Forming

21 Forming

22 stepped bore

23 cover

24 breakthrough

25 fiberglass rod

26 transition sleeve

27 upper fiberglass evenings

28 lower fiberglass evenings

30 slot guide

31 edge thickening

32 recess

33 curvature

34 bulbs

35 ballast

40 cavity

100 lighting element

101 socket 102 lighting area

103 lighting element

104 steel strip

105 steel strip

106 struts

107 clamping device

108 threaded rod

109 bulbs

110 recess

Claims

claims

1. lighting element (1, 100), in particular for advertising purposes, as a warning light or for illumination, consisting of an at least partially translucent illumination surface (4, 102) which is held by at least one clamping element and at least one lighting means (34, 109),

characterized,

the illumination surface (4, 102) is held along an axis of symmetry by at least two tensioning elements (12, 13) and can be reversibly converted from a relaxed position into a tensioned position.

2. Lighting element according to claim 1,

characterized,

in that the tensioning elements (12, 13) generate a tension in the longitudinal direction of the axis of symmetry and at right angles thereto.

3. Lighting element according to claim 1 or 2,

characterized,

the upper clamping element is designed as a clamping plate (12) or has a clamping plate (12).

4. Lighting element according to one of claims 1 or 2,

characterized, the lower clamping element is designed as a clamping plate (13) or has a clamping plate (13) or forms a stationary base.

5. Lighting element according to one of claims 1 to 4,

characterized,

in that the clamping elements (12, 13) can be joined together to form a cup-shaped case, wherein a case element (10) forms the upper and a case element (11) forms or has the lower clamping plate (12, 13), which enclose a cavity (40) ,

6. Lighting element according to one of claims 1 to 5,

characterized,

that in the cavity (40) the lighting means (34), optional ballasts (35) and other devices are integrated and in the assembled position additionally the material of the illumination surface (4) is added.

7. Lighting element according to one of claims 1 to 6,

characterized,

that the clamping elements are each formed in two parts and consist of an outer case-like shell and an inner clamping plate (12, 13).

8. Lighting element according to one of claims 1 to 7,

characterized, that between the shell and the clamping plate (12, 13), a circumferential slot guide (30) is formed with a clamping surface or a clamping recess (32).

9. Lighting element according to one of claims 1 to 8,

characterized,

in that the two clamping plates (12, 13) have at their edges a converging curvature (33) against which the illumination surface (4) bears for clamping.

10. Lighting element according to one of claims 1 to 9,

characterized,

that the two clamping elements (12, 13) are pressed apart by a spring mechanism along the axis of symmetry or have a central recess, wherein the upper clamping element (12) has an outwardly stepped bore (22), while the lower clamping element (13) one after externally open recess (24) through which a voltage generating means, such as a fiberglass rod (25), is inserted and can be fixed by a locking element.

11. Lighting element according to claim 1,

characterized,

in that the illumination surface (102) is held by an upper steel strip (104) as tensioning elements, and that the illumination surface (102) is supported by a lower one Steel strip (105) is held as a clamping element or a fixed base (101).

12. Lighting element according to claim 11,

characterized,

at least one, preferably a plurality of steel bands are arranged in the middle region, the middle steel bands having a larger dimension than the lower or upper steel bands (104, 105), the steel bands (104, 105) being pushed apart along the symmetry axis by a spring mechanism become.

13. Lighting element according to claim 11 or 12,

characterized,

in that the steel strips (104, 105) are held by a centric clamping device (107) and / or are displaceably arranged along the symmetry axis of the clamping device (107).

14. Lighting element according to claim 11, 12 or 13,

characterized,

the lower tensioning device (107) is arranged on a base foundation.

15. Lighting element according to one of claims 1 to 14, characterized,

that the clamping elements (12, 13) or steel strips (104, 105) are circular or polygonal.

16. Lighting element according to one of claims 1 to 15,

characterized,

in that the lighting means (34, 109) are fastened in or on the clamping device (107) or the clamping elements, in particular clamping plates (12, 13).

17. Lighting element according to one of claims 1 to 16,

characterized,

that this has the shape of a Litfasssäule, wherein the Litfasssäule is formed collapsible at least in some areas.

18. Lighting element according to one of claims 1 to 17,

characterized,

the illumination surface (4, 102) consists of an elastic material, a tissue or a tissue film.

19. Lighting element according to claim 18,

characterized, that the elastic material, the tissue or the tissue film is translucent.

20. Lighting element according to claim 18 or 19,

characterized,

that the elastic material, the tissue or the tissue film is transparent or crystal clear and is provided on the inside with a printed translucent film.

21. Lighting element according to claim 18, 19 or 20,

characterized,

that the translucent film is biased against the elastic material, the fabric or the fabric film or connected thereto, for example glued, is.

22. Lighting element according to one of claims 18 to 21,

characterized,

that the elastic material, the tissue or the tissue film and the translucent film are formed foldable.

23. Lighting element according to one of claims 1 to 22,

characterized, that a storage case or a storage box is provided, which serves as a fastening element and / or as a base.

24. Lighting element according to one of claims 1 to 23,

characterized,

that a pneumatic or hydraulic tensioning element is provided with a tensioning body and that in addition a compressor for inflating the tensioning body is provided in the storage case or in the storage box.