EP2594845A1 - Fixation de lampe structurelle - Google Patents

Fixation de lampe structurelle Download PDF

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Publication number
EP2594845A1
EP2594845A1 EP11189874.8A EP11189874A EP2594845A1 EP 2594845 A1 EP2594845 A1 EP 2594845A1 EP 11189874 A EP11189874 A EP 11189874A EP 2594845 A1 EP2594845 A1 EP 2594845A1
Authority
EP
European Patent Office
Prior art keywords
light
light unit
unit according
profiles
linear direction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP11189874.8A
Other languages
German (de)
English (en)
Inventor
Jonathan Vancoillie
Yves Struyve
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Trislot NV
Original Assignee
Trislot NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Trislot NV filed Critical Trislot NV
Priority to EP11189874.8A priority Critical patent/EP2594845A1/fr
Publication of EP2594845A1 publication Critical patent/EP2594845A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V15/00—Protecting lighting devices from damage
    • F21V15/02—Cages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes

Definitions

  • the present invention relates to a multifunctional light unit combining lighting function with structural, mechanical function.
  • the light unit of the present invention can be integrated in a mechanical structure in a working sites, in urban environments, and the like.
  • a light unit can be used to illuminate a whole space, and can then be positioned quite high, out of reach of potential accidental or sometimes voluntary impacts with projectiles, such as street lights and ceiling lights in warehouses.
  • a specific structure must be illuminated, such as staircases, tunnels, pedestrian under-passages, emergency exits, barriers, protective structures, fixtures in sports and play grounds, and the like, and the light sources must be positioned much closer to the ground and are thus exposed to impacts from gravel projected by passing vehicles, from manoeuvring vehicles, or even from vandalism, the latter having expensive consequences in urban environments. In such conditions, the light source must be protected or shielded from such impacts.
  • transparent protective materials such as polymers or glass are also damaged by such impacts and impact resistant materials are usually opaque and are therefore not suitable.
  • the light unit may be integrated into a structure as a part thereof, and not as a mere external addition, fixed to a complete structure.
  • EP0098504 and EP1498656 propose a tubular metal structure comprising a longitudinal slot in which is introduced a row of diodes enclosed in a transparent housing.
  • Similar tubular structures with a light source located in a slot extending along the length of a metal tube can be found e.g., in:
  • the present invention proposes a new light unit, which combines the advantages of the light systems discussed supra, but further allows an illumination in all directions, it can be used with any type of light source, and is more resistant to acts of vandalism.
  • the present invention is defined in the appended independent claims. Preferred embodiments are defined in the dependent claims.
  • the present invention concerns an elongated light unit extending at least on a first linear direction and comprising:
  • a light unit according to the present invention preferably comprises coupling means for being coupled side by side to other light units of the same type, so that a modular mechanical and illuminated structure can thus be formed.
  • the coupling means should comprise anchoring means of course, but also electric connecting means, so that external wiring of the structure is not required.
  • the pervious to light protective metal screen is in the shape of a tubular sheath surrounding the light source.
  • Such tubular protective screen can be formed of a surface profile wound around a number of support profiles.
  • a support profile may be wound around closely packed surface profiles.
  • the surface profiles may be aligned substantially parallel to the first linear direction (X), but they may also be wound side-by-side about said linear direction (X).
  • Any of the foregoing tubular construction are suitable for providing the light unit with sufficient mechanical properties to be used as integral parts of indoor and outdoor structural applications. These include for example, banisters, staircases, gates, doors or window frames, scaffoldings, protective structures in urban environments, and the like.
  • the protective metal screen does not surround completely the light source. It can shield it only over a limited angular range, over which it is supposed to illuminate and be protected.
  • the protective screen may be curved or planar depending on the applications.
  • a modular construction is advantageous, allowing large areas to be back-illuminated, whilst still offering an effective protection to the light source(s).
  • the metal surface profiles may extend substantially normal to said first linear direction (X) and said metal support profiles may extend substantially parallel thereto. Inversely, the metal surface profiles may extend substantially parallel to said first linear direction (X) and th metal support profiles may extend substantially normal thereto.
  • the two solutions are possible and their implementation depend on the requirements of the light unit.
  • neither surface, nor support profiles are parallel to the first direction, such as for example a tube of wound surface and support profiles discussed above.
  • a light unit according to the present invention may extend along a first linear direction (X) which can be rectilinear, or which can be curvilinear. Similarly, the other two dimensions of the screen can be rectilinear or curvilinear.
  • This design freedom combined with the high mechanical properties that the present light unit can reach render it particularly suitable for use in a number of indoor or outdoor applications, such as for example, elements integrated in a barrier, a banister, a gate, a door, a window frame, a scaffolding, a bulkhead, a traffic signal, urban furniture, a pole, or a staircase.
  • the present invention concerns a light unit comprising a light source shielded by a specific protective screen which is pervious to light and yields excellent mechanical properties, which make such unit suitable as a structural element in applications exposed to severe aggressive environments.
  • Figure 1 illustrates a tubular embodiment of a light unit according to the present invention.
  • a light source (3) is provided, extending along a first linear direction (X) (in Figure 1(a) said direction (X) is normal to the Figure, and in Figure 1 (b) it is vertical) which can be any light source known in the art, such as a series of light emitting diode (LED) or incandescent bulbs, a fluorescent tube, and the like.
  • LED light emitting diode
  • a tubular metal protective screen (2) surrounds the light source and is composed of a surface profile (2a) wound around and fixed to a series of support profiles (2b).
  • the surface profile(s) are welded to the support profile(s) as this is a most efficient fixing technique, which is quick, accurate, can be fully automated, and yields a strong structure.
  • Figure 1(b) which represents a cut-away perspective view of a protective screen of the type depicted in Figure 1(b)
  • the metal protective screen (2) seems to form an opaque tubular structure. In reality, each successive layer of surface profile does not contact and is spaced apart from the next by a given distance.
  • the light emitted by a source of light (3) located inside the tubular protective screen (2) can propagate through the thin, but numerous gaps separating adjacent surface profiles.
  • Light transmission through the protective screen is enhanced with broader gaps between adjacent surface profiles and with thinner surface profile but, depending on the application, it could be detrimental to the mechanical properties, in particular stiffness, of the structure.
  • the gap between adjacent surface profiles should not exceed 2.5 mm. It is preferred that the gap does not exceed 2.0 mm.
  • the gap can be not more than 1.5 mm, preferably not more than 1.0 mm, more preferably not more than 0.7 mm, most preferably not more than 0.4 mm. With gaps between adjacent surface profiles less than 0.2 mm, the light transmission through the screen may be insufficient for many applications.
  • the surface profiles (2a) and support profiles (2b) may have different cross-sectional geometries.
  • Figure 1(a) shows support profiles (2b) having a triangular cross-section
  • the support profiles (2b) illustrated in Figure 1(b) have a square cross-section with a sharp triangular protrusion jutting out of the side of the support profile contacting and fixed to the surface profiles.
  • Such sharp ridge contacting the surface profiles enhances the strength of the welding point (2c) between support profile and surface profile. If other fixing techniques than welding are used to fix the surface profiles to the support profiles, such as glue, then such sharp tip is not desired.
  • the surface profiles may have a broad variety of cross sections, the choice of one over the other depending on the desired mechanical and light transmission properties required by the lamp unit.
  • the surface profiles may have a cross-sectional shape selected from triangular as represented in Figure 1(b) , but also square, trapezoidal, round, elliptic, star-shaped, H-, I-, V-, L-, or T-shaped.
  • the cross-sectional geometry of the surface profile will influence the mechanical properties of the tube, but also the way the light will propagate through the gaps between two adjacent surface profiles.
  • a triangular cross-sectional geometry in particular an isosceles triangular geometry, with one summit pointing towards the light source, and the side opposite thereto facing outside the tube is particularly preferred, as this geometry gives the tubular structure a high bending stiffness and focuses the light rays through the thin gaps between two adjacent surface profiles.
  • the surface profiles are preferably in the form of relatively thin wires.
  • the largest linear dimension of the cross section of the surface profiles can be up to 30.0 mm, preferably up to 20.0 mm.
  • it can be lower than 10.0 mm, preferably lower than 5.0 mm, more preferably lower than 3.5 mm, most preferably lower than 2 mm and even lower than 1.0 mm.
  • the largest linear dimension of the cross-section is not necessarily the one exposed to the exterior and obstructing light transmission as can be seen for example in Figure 1(b) wherein the largest linear dimension of the isosceles triangular cross-section defines the thickness of the protective screen.
  • the greatest linear dimension of the orthogonal projection of a surface profile onto the light source is preferably not more than 20.0 mm, preferably not more than 10.0 mm for large structures, and for smaller structures, it is preferred that it is not more than 4 mm, preferably not more than 3 mm, more preferably not more than 1.5 mm, most preferably not more than 0.7 mm.
  • thinner surface profiles more gaps per unit length of the light unit are provided, allowing transmission of the light therethrough. This is; however; detrimental to the mechanical properties of the protective screen.
  • a tubular protective screen suitable for a light unit according to the present invention can be obtained in different ways.
  • a first construction illustrated in Figure 1 and discussed above, comprises a number of support profiles (2b) extending substantially parallel to a first linear direction (X) around which a surface profile (2a) is densely wound to extend substantially normal to said first linear direction (X).
  • a tubular screen can be obtained by aligning closely packed surface profiles (2a) surrounding substantially parallel thereto a first linear direction (X), and winding around said surface profiles (2a) a support profile with wide winding steps.
  • both surface and support profiles (2a, 2b) are wound about a first linear direction (X), the former with a tight winding step, leaving a gap between adjacent surface profiles of not more than 2.5 mm, the latter with a broader winding step.
  • first linear direction (X) There is therefore no strict limitation regarding the orientation of the surface and support profiles with respect to the first linear direction (X).
  • the surface profiles may thus extend substantially normal to said first linear direction (X) and said metal support profiles extend substantially parallel thereto or, alternatively, the surface profiles may extend substantially parallel to said first linear direction (X) and said metal support profiles extend substantially normal thereto.
  • neither the surface nor the support profiles need be normal or parallel to the first linear direction (X), such as in the co-wound structure discussed above.
  • the best configuration depends on the required properties of the light unit, as well as on a number of parameters, such as desired gap width, profile dimensions, size of the light unit, complexity of the geometry and required light transmission and mechanical properties of the light unit.
  • first linear direction (X) can be curvilinear, defining a winding tubular structure.
  • the cross-sectional geometry of the tubular geometry is not necessarily a circle, but can be any closed loop, with or without angles.
  • the cross-sectional geometry of the tubular screen needs not be constant along the linear direction (X), and can vary in both shape and size.
  • a light unit according to the present invention can be coupled side-by-side —in the case of a tubular structure it should be said end-to-end, the latter expression being herein considered as comprised within the meaning of the former— so that a modular superstructure can be built by coupling such units together.
  • the light unit should be provided with anchoring means suitable for mechanically coupling two such units side-by-side. It should also be provided with connecting means, such that no external wiring is required to power the whole superstructure.
  • a protective screen according to the present invention can be planar, as illustrated in Figure 3 . It can define any three dimensional surface as desired and as permitted by the type of surface profile (2a) and support profile (2b) selected. All the various aspects of a light unit of the present invention presented above with respect to tubular structures apply to non-tubular structures alike. Indeed, a three dimensional surface structure could be obtained from a tubular structure as discussed above. For example, the graphical cut of the perspective view illustrated in Figure 1(b) could be done to a real protective screen to obtain an open tube which defines a non-tubular structure. The tube could also be flattened to give it a different geometry.
  • tubular light units can form the top rail or vertical supports of a banister and a barrier, it can be integrated into gates, doors, or window frames, or used in scaffoldings and staircases.
  • a structural element of a mechanical structure For example, tubular light units can form the top rail or vertical supports of a banister and a barrier, it can be integrated into gates, doors, or window frames, or used in scaffoldings and staircases.
  • the light is off, such profile is difficult to distinguish from any other metal tube. But when the light is put on, the whole structure becomes illuminated, enhancing visibility, and thus safety.
  • Light units according to the present invention can find many applications in urban environments, where lights most needed for traffic and people safety and yet are most exposed to vandalism and to impacts by stones projected by vehicles or by the vehicles themselves doing wrong manoeuvres.
  • any obstacle to a vehicle is advantageously illuminate to prevent a driver from not seeing it.
  • a curb, a tree, a pole, a wall corner, a sharp curve, a chicane or other speed control means, a pedestrian passage, underground passages and tunnels, school exits, traffic signalling panels, urban furniture, and the like can advantageously be lit by light units according to the present invention, which provide illumination and high resistance to impact and, in particular, to vandalism acts.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP11189874.8A 2011-11-21 2011-11-21 Fixation de lampe structurelle Withdrawn EP2594845A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11189874.8A EP2594845A1 (fr) 2011-11-21 2011-11-21 Fixation de lampe structurelle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11189874.8A EP2594845A1 (fr) 2011-11-21 2011-11-21 Fixation de lampe structurelle

Publications (1)

Publication Number Publication Date
EP2594845A1 true EP2594845A1 (fr) 2013-05-22

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ID=45315498

Family Applications (1)

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EP11189874.8A Withdrawn EP2594845A1 (fr) 2011-11-21 2011-11-21 Fixation de lampe structurelle

Country Status (1)

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EP (1) EP2594845A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2601034A (en) * 1950-06-30 1952-06-17 Richard D Lee Lamp diffuser for elongated tubular lamps
DE918215C (de) * 1952-02-14 1954-09-20 Keller & Co Raster fuer Leuchtstoffroehren od. dgl.
EP0098504A2 (fr) 1982-07-09 1984-01-18 CEAG Licht- und Stromversorgungstechnik GmbH Appareil d'éclairage antidéflagrant
WO1985003760A1 (fr) * 1984-02-22 1985-08-29 Solar Armaturproduktion A/S Luminaire avec lampe en forme de tige et segment a lamelles
DE3909594A1 (de) * 1989-03-23 1990-10-04 Otterpohl Heinz Grosslamellen-leuchtenkoerper
EP1498656A2 (fr) 2003-07-14 2005-01-19 Elektro Pro Light KG des Bergmeister Markus & Co. Dispositif d'éclairage, en particulier pour tunnels
EP1712835A1 (fr) * 2005-04-13 2006-10-18 Reggiani S.p.A. Illuminazione Dispositif d'éclairage avec écran amélioré

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2601034A (en) * 1950-06-30 1952-06-17 Richard D Lee Lamp diffuser for elongated tubular lamps
DE918215C (de) * 1952-02-14 1954-09-20 Keller & Co Raster fuer Leuchtstoffroehren od. dgl.
EP0098504A2 (fr) 1982-07-09 1984-01-18 CEAG Licht- und Stromversorgungstechnik GmbH Appareil d'éclairage antidéflagrant
WO1985003760A1 (fr) * 1984-02-22 1985-08-29 Solar Armaturproduktion A/S Luminaire avec lampe en forme de tige et segment a lamelles
DE3909594A1 (de) * 1989-03-23 1990-10-04 Otterpohl Heinz Grosslamellen-leuchtenkoerper
EP1498656A2 (fr) 2003-07-14 2005-01-19 Elektro Pro Light KG des Bergmeister Markus & Co. Dispositif d'éclairage, en particulier pour tunnels
EP1712835A1 (fr) * 2005-04-13 2006-10-18 Reggiani S.p.A. Illuminazione Dispositif d'éclairage avec écran amélioré

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