EP1167657A2 - Plattform die in Kombination mit einem Gerüst benutzt werden kann - Google Patents

Plattform die in Kombination mit einem Gerüst benutzt werden kann Download PDF

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Publication number
EP1167657A2
EP1167657A2 EP01202367A EP01202367A EP1167657A2 EP 1167657 A2 EP1167657 A2 EP 1167657A2 EP 01202367 A EP01202367 A EP 01202367A EP 01202367 A EP01202367 A EP 01202367A EP 1167657 A2 EP1167657 A2 EP 1167657A2
Authority
EP
European Patent Office
Prior art keywords
platform
skins
core
panel
thickness
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Withdrawn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
EP01202367A
Other languages
English (en)
French (fr)
Other versions
EP1167657A3 (de
Inventor
Christian Willemsen
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.)
Altrex BV
Original Assignee
Altrex BV
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 Altrex BV filed Critical Altrex BV
Publication of EP1167657A2 publication Critical patent/EP1167657A2/de
Publication of EP1167657A3 publication Critical patent/EP1167657A3/de
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G5/00—Component parts or accessories for scaffolds
    • E04G5/08—Scaffold boards or planks
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G1/00—Scaffolds primarily resting on the ground
    • E04G1/15—Scaffolds primarily resting on the ground essentially comprising special means for supporting or forming platforms; Platforms
    • E04G1/153—Platforms made of plastics, with or without reinforcement

Definitions

  • the invention relates to a platform which is suitable for use in combination with a scaffold, comprising a frame which can be coupled to the scaffold and a panel which is supported by the frame.
  • a platform of the abovementioned type for use in combination with a rolling scaffold is known in practice.
  • the frame of the known platform generally consists of aluminium, and the panel is generally a sheet of multi-ply wood, such as water-resistant adhesive-bonded birch plywood or meranti, with a thickness of 9 to 12 mm and provided with a non-slip layer on the top side.
  • the platform has to be sufficiently strong and rigid to comply with the demands of standard NEN 2718.
  • the known platform has the drawback that its weight is so high that, while it is being fitted to and removed from the scaffold, it has to be held by a plurality of scaffolders simultaneously, and the same applies when it is being transported upwards or downwards. This represents a considerable physical load on the scaffolders. Furthermore, when transporting awkward loads of this type, scaffolders often adopt unergonomic positions and work with a bent back. In the long term, this causes high levels of absence from work, sickness levels and permanent physical problems compared to other trades.
  • the said object is achieved by the fact that the platform according to the invention is characterized in that the panel is a sandwich structure comprising a core of thermoplastic material and fibre-reinforced skins of thermoplastic material which are partially fused to the core on respective principal sides of the core.
  • the core of the panel may be an extruded corrugated sheet or honeycomb structure.
  • platforms for scaffolds in which the panels consist of extruded or corrugated aluminium are known, the weight of platforms of this type which is required in order to achieve the required strength and rigidity is still high.
  • sandwich panels are known per se for use in, for example, aircraft and racing cars.
  • sandwich structures of this type consist of expensive, exotic materials, such as epoxy reinforced with carbon or aramid fibres, epoxy being used as a binder for sticking together the core and the skins.
  • sandwich structures which comprise a honeycomb core of aluminium with aluminium skins attached by means of a binder are known per se. These known structures have a relatively low weight, high rigidity, a high strength and a high durability, but are also very expensive. The high price makes structures of this type unsuitable for commercial use for a low-grade item of equipment, such as a platform for a scaffold.
  • the panel of the platform differs from the known structures in that a high-grade technical structure, namely a sandwich structure, with fusible low-grade (bulk) plastics is used for its production.
  • a high-grade technical structure namely a sandwich structure
  • fusible low-grade (bulk) plastics is used for its production.
  • Figs. 1 and 2 show a platform 1 according to the invention which comprises a frame 2 and a panel 3 which is supported by the frame 2.
  • the frame 2 may, as is known per se, consist of elongate aluminium parts.
  • the frame 2 has hooks, such as the hooks 6, 7, by means of which the platform 1 can be hooked over a pole of a scaffold or other climbing equipment, such as a stage between two scaffold frames or a suspended outer wall stage (not shown).
  • the panel 3 has a thickness of from 12 to 14 mm and, according to the invention, has a sandwich structure.
  • Figs. 3 and 4 show sandwich structures which can be used for the panel 3.
  • Each of the sandwich structures comprises a core, such as the corrugated sheet 11 shown in Fig. 3 or the honeycomb structure shown in Fig. 4, to the principle sides of which skins, such as the skins 14 shown in Fig. 3 or the skins 16 shown in Fig. 4, are attached.
  • the cores 11, 12 and the skins 14, 16 consist of thermoplastic material, the skins 14, 16 being reinforced by means of fibres.
  • the thermoplastic material is in particular polypropylene (PP), and the fibres of the skins 14, 16 are in particular glass fibres.
  • the cores 11, 12 of polypropylene can be produced easily and inexpensively by extrusion.
  • Polypropylene corrugated sheets and polypropylene honeycomb structures are used on a large scale for packaging purposes.
  • the skins 14, 16 may likewise be formed by inexpensive bulk material, for example by skins which are known under the trade name Twintex, type designation PP60. These skins comprise polypropylene with 40% by weight of glass. The number of fibres in one direction may differ from the number of fibres in a direction which is perpendicular to the first direction. Skins of this type with a thickness of from 1 to 2 mm and a direction-dependent fibre number ratio of 1 to 4 are suitable for the skins 14, 16 of the panel 3 according to the invention.
  • the skins 14, 16 are fitted to the cores 11, 12, and the panels 3 are attached to the frame 2, in such a manner that for each unit length there are more fibres in the transverse direction on the panel 3 than in the longitudinal direction of the panel 3. This allows greater loads to be applied to the panel 3 or makes it possible to use less material for the panel 3.
  • a suitable combination for the panel 3 with the sandwich structure comprises a core of an extruded corrugated sheet of polypropylene with a thickness of 1.0 mm and top and bottom skins of Twintex PP60 with a thickness of 0.7 mm and 1 mm, respectively, and a transverse/longitudinal fibre number ratio of 4/1 and 1/1, respectively.
  • a Twintex PP60 skin with a transverse/longitudinal fibre number ratio of 4/1 is, however, more expensive than one with a ratio of 1/4 and even more expensive than for a thickness of 1 mm and a ratio of 1/1.
  • an extruded core is more expensive than a honeycomb core. Furthermore, although it is relatively easy to impart a suitable profile to an extruded core, for example in order to achieve a better impact strength, its use is dependent on the length/width orientation of the profile, whereas a honeycomb core is independent of orientation.
  • thermoplastic core with a honeycomb structure of Sodesa or Tubus Bauer with a thickness of 12 mm
  • Twintex PP60 1/1 glass-fibre-reinforced thermoplastic skins with a thickness of 1 mm.
  • the skins 14, 16 are preferably provided with a non-slip structure. Furthermore, the skins 14, 16 may have an indelible colour by suitable selection of the material of which they consist. By using different colours, it is possible to assign specific functions to the use of the platforms 1 or parts of these platforms. Known platforms could be painted for this purpose, but this is not a practical solution in view of the wear to the paint which occurs while the platforms are being used.
  • the skins 14, 16 can be heated, after which they are laid onto the appropriate side of the core 11, 12 and then a pressure is exerted.
  • the pressure exerted on the skins 14, 16 is sufficient for some of the plasticized material of the skins 14, 16 to penetrate into the core 11, 12. The result is very good adhesion.
  • the skins are preheated in a continuous process and, with core material being added between them, are passed between two rollers which exert a suitable pressure and cause the thermoplastic skins and core material to fuse together.
  • the rollers By providing the rollers with a suitable profile, it is possible to apply a non-slip profile directly to the skins.
  • the panel according to the invention can be produced quickly and inexpensively using thermoplastic materials which are already in widespread use.
  • a binder such as glue, which makes production simple, inexpensive, safe and the entire panel easily to be recycled.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Laminated Bodies (AREA)
  • Body Structure For Vehicles (AREA)
EP01202367A 2000-06-26 2001-06-19 Plattform die in Kombination mit einem Gerüst benutzt werden kann Withdrawn EP1167657A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1015526 2000-06-26
NL1015526A NL1015526C1 (nl) 2000-06-26 2000-06-26 Platform geschikt voor toepassing in combinatie met een steiger.

Publications (2)

Publication Number Publication Date
EP1167657A2 true EP1167657A2 (de) 2002-01-02
EP1167657A3 EP1167657A3 (de) 2003-03-19

Family

ID=19771596

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01202367A Withdrawn EP1167657A3 (de) 2000-06-26 2001-06-19 Plattform die in Kombination mit einem Gerüst benutzt werden kann

Country Status (2)

Country Link
EP (1) EP1167657A3 (de)
NL (1) NL1015526C1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003083352A3 (de) * 2002-03-30 2003-12-31 Uti Holding & Man Ag Leichte gerüstplatte und verfahren zu deren herstellung
DE10354365B4 (de) * 2003-11-20 2006-08-17 Enkos Gmbh Trägerelement sowie Verfahren zur Herstellung eines solchen Trägerelements, Körper in der Ausbildung eines Tragelements sowie Verfahren zur Herstellung des Körpers
EP1754585A1 (de) 2005-08-17 2007-02-21 TNO Bedrijven B.V. Verfahren und Gerät zur Herstellung eines Sandwich-Paneeles
NL2022888B1 (en) 2019-04-05 2020-10-08 Altrex Bv Platform for a suspension bridge
WO2020254537A3 (en) * 2019-06-21 2021-02-04 Sabic Global Technologies B.V. Scaffold board of profiled fiber reinforced material and meethod of manufacturing the same

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4208812A1 (de) 1992-03-19 1993-09-23 Tubus Bauer Gmbh Vorrichtung und verfahren zum herstellen einer leichtbauplatte sowie danach hergestellte leichtbauplatte

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2457946A1 (fr) * 1979-06-01 1980-12-26 Somefran Element de plancher pour echafaudage
CA2111724A1 (en) * 1993-12-17 1995-06-18 Raymond Wayne Gillard Scaffold system
DE29711492U1 (de) * 1997-07-01 1998-01-22 Asglawo GmbH - Stoffe zum Dämmen und Verstärken, 09627 Hilbersdorf Gerüstbelag
DE19738426A1 (de) * 1997-09-03 1999-03-04 Layher W Vermogensverw Gmbh Laufboden

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4208812A1 (de) 1992-03-19 1993-09-23 Tubus Bauer Gmbh Vorrichtung und verfahren zum herstellen einer leichtbauplatte sowie danach hergestellte leichtbauplatte

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003083352A3 (de) * 2002-03-30 2003-12-31 Uti Holding & Man Ag Leichte gerüstplatte und verfahren zu deren herstellung
DE10354365B4 (de) * 2003-11-20 2006-08-17 Enkos Gmbh Trägerelement sowie Verfahren zur Herstellung eines solchen Trägerelements, Körper in der Ausbildung eines Tragelements sowie Verfahren zur Herstellung des Körpers
EP1754585A1 (de) 2005-08-17 2007-02-21 TNO Bedrijven B.V. Verfahren und Gerät zur Herstellung eines Sandwich-Paneeles
NL2022888B1 (en) 2019-04-05 2020-10-08 Altrex Bv Platform for a suspension bridge
WO2020254537A3 (en) * 2019-06-21 2021-02-04 Sabic Global Technologies B.V. Scaffold board of profiled fiber reinforced material and meethod of manufacturing the same

Also Published As

Publication number Publication date
EP1167657A3 (de) 2003-03-19
NL1015526C1 (nl) 2001-12-28

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