EP0805904A1 - Gerüstboden - Google Patents
GerüstbodenInfo
- Publication number
- EP0805904A1 EP0805904A1 EP96901846A EP96901846A EP0805904A1 EP 0805904 A1 EP0805904 A1 EP 0805904A1 EP 96901846 A EP96901846 A EP 96901846A EP 96901846 A EP96901846 A EP 96901846A EP 0805904 A1 EP0805904 A1 EP 0805904A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- aluminum
- longitudinal
- scaffolding
- frame
- members
- 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.)
- Granted
Links
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 48
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 48
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 31
- 239000010959 steel Substances 0.000 claims abstract description 31
- 239000002023 wood Substances 0.000 claims abstract description 12
- 239000011120 plywood Substances 0.000 claims abstract description 10
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 6
- 239000004411 aluminium Substances 0.000 abstract 3
- 238000003860 storage Methods 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- 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
- E04G1/152—Platforms made of metal or with metal-supporting frame
Definitions
- the present invention relates to a scaffolding platform, more particularly but not exclusively to a scaffolding platform of the aluminum / wood type.
- the steel plates In the field of scaffolding, two main types of trays are known, constituting work surfaces for personnel, namely: steel trays, and aluminum / wood trays.
- the steel plates generally consist of a perforated sheet to be less slippery, and folded or formed by roller burnishing in order to obtain a rigid floor, carrying at its ends positioning hooks for the plate on the tubular structure of the scaffolding .
- This first type of tray is not concerned with the invention.
- the aluminum / wood trays in which the present invention is concerned, generally consist of a rectangular aluminum frame, and a plywood floor, fitting into the aluminum frame.
- the frame usually consists of two supporting beams, which may have a length of 3 m, 2.5 m or 2 m, and two end crosspieces.
- the side rails and cross members are commonly formed by extruded hollow aluminum profiles.
- the profiles which constitute the side members have longitudinal grooves, in which are placed the longitudinal edges of the plywood floor, which itself has very good mechanical strength.
- the end crosspieces carry hooks used to position the plate on the tubular steel structure of the scaffolding, the hooks generally being welded or bolted.
- a known solution consists in welding each end cross member against the side members, generally at 90 °.
- the welds connect the two vertical sides of the cross member to a side wall of the side members.
- the assembly by welding of aluminum profiles, by a TIG or MIG type process, is a long and expensive operation, difficult to robotize, one of the effects of which is to reduce the mechanical resistance of aluminum by around 50%. in the weld area.
- welded, metallurgically transformed areas are sources of cracks.
- Another kind of aluminum / wood tray has a ladder beam made up of crimped rails and bars, supporting the plywood floor. The hooks are generally arranged in the extension of the side members.
- the section of the aluminum beams is studied in such a way that it ensures the resistance to bending of the plate. It is therefore necessary that this section is sufficiently high, and that the walls of the profile are thick, to obtain an inertia leading to the desired mechanical strength. This eventually results in two drawbacks: On the one hand, the weight of the aluminum beams is important, and therefore their cost is high.
- all these plates are not designed to support plinths, arranged above a longitudinal edge of a plate.
- the plinths therefore most often remain attached to the tubular steel structure of the scaffolding, more particularly to the posts.
- inserts are welded to the side members or the end crosspieces to support these baseboards.
- Such arrangements obviously remain expensive, and increase the overall width of the plates.
- the problems posed by the current scaffolding plates of the aluminum / wood type are: the connection of the end crosspieces with the beams, the height of the beams in relation to their section and therefore the weight of these elements, their cost and their storage volume, fixing the plinth, and the overall cost of the tray resulting from both the amount of aluminum required and the assembly time.
- the invention aims to solve these various problems, and thus eliminate the drawbacks set out above, by providing a scaffolding plate of the aluminum / wood type which is light and of economical manufacture, while offering high mechanical strength and low storage footprint.
- the present invention essentially relates to a scaffolding plate, in particular of the aluminum / wood type, consisting of a rectangular frame in particular of aluminum and a floor in particular of plywood, fitting into the frame, this frame itself consisting of two beams and two end crosspieces in the form of extruded profiles, in particular of aluminum, the plate being remarkable in that the frame rails have at least one longitudinal groove or a longitudinal duct receiving a reinforcing means of the steel rod type and / or means for fixing the end crossmembers, applied against the ends of the side members.
- the profiles constituting the side members of the frame of the scaffolding plate have a substantially triangular cross section, the tip of the triangular section being directed downwards, these profiles comprising a longitudinal groove or a longitudinal duct situated in the region of the lower point of its triangular section, and capable of receiving the reinforcing means of the steel rod type, while the base of said triangular section, opposite its point, partially forms the surface of the floor of the scaffolding platform.
- the beams thus have an optimal section, the choice of a triangular section with point downwards, combined with a steel rod, making it possible in particular to reduce the aluminum mass of the beam.
- each spar behaves in flexion in the manner of a beam, the upper part of its section working in compression and the lower part of its section working in traction.
- the forces or stresses must remain below fixed limits (approximately 13 kg / mm 2 ) for aluminum, a certain amount of aluminum is in principle necessary.
- the proposed configuration, with triangular section makes it possible to reduce as much as possible the quantity of aluminum working in traction, by replacing it by a continuous steel rod which can easily work with stresses of 36 kg / mm 2 or more in traction.
- a reduction in the height of the section of the aluminum profile constituting the spar is also obtained, and consequently a reduction in the storage volume of the scaffolding plates.
- the continuous steel rod received in the longitudinal groove or the longitudinal duct of the profile constituting the spar has threaded ends, intended to pass right through the end crosspieces, applied against the ends of the side members, and to receive tightening nuts.
- the rods thus ensuring the blocking of the frame of the scaffolding plate, while strengthening the profiles forming the side members.
- the longitudinal groove or the longitudinal duct of each spar can always be used for the assembly of the end crosspieces, by providing that this groove or this duct receives, at its open ends at the ends of the spar, fixing pins of a common type, which receive themselves fixing screws passing right through the end crosspieces, applied against the ends of the side members.
- the arrangement also allows an easy visual examination of the state of these rods or other fixing means.
- the length of the end crossmembers is determined in such a way that the end faces of each crossmember, assembled to the longitudinal members, correspond substantially to the vertical median of the section of these longitudinal members, and more particularly to the median of the triangular section (as defined above) of said beams.
- a scaffolding plate in particular of the aluminum / wood type, consisting of a rectangular frame in particular of aluminum and a floor in particular of plywood, inserting into the frame, this frame itself being made up of two longitudinal members and two end crosspieces in the form of extruded profiles, in particular aluminum, the plate being remarkable in that at each junction of a crosspiece and a spar is inserted a corner piece, engaged on the one hand in the cross member and on the other hand in the spar, the corner piece being automatically blocked when the cross member is fixed to the spar.
- This corner piece thus blocked on the frame of the scaffolding plate without any other fixing accessory, can alone perform several functions, thanks to an appropriate shape:
- the corner piece closes the angle of the two sections respectively constituting the beam and the cross member, thus preventing the penetration of water or other products inside the sections.
- the corner piece advantageously comprises, opening onto its upper face, a housing in particular of cylindrical shape, suitable for fixing the end of a plinth along the plate. scaffolding.
- the plinth can thus be fixed directly on the plate, whereas currently the plinths are generally fixed between the posts of the scaffolding, which leaves a significant space between the plinth and the plate, from where a risk of falling. objects such as tools, a drawback which the invention remedies.
- this corner piece ensures, in addition to the screwed assembly of the cross member on the spar, mechanical locking between this cross member and said spar, preventing any torsional movement.
- this corner piece eliminates by its presence the cutting edges located in the region of the angle of the plate, which result from the cutting of the sections constituting the spar and the end crosspiece.
- the plate is thus made less angular, therefore less dangerous.
- the protruding corner piece provides impact protection for the aluminum frame made up of side members and cross members.
- Figure 1 is an overall perspective view of a scaffold plate of the aluminum / wood type, according to the present invention.
- Figure 2 is an exploded perspective view of the corner region of this scaffolding plate, in a first embodiment
- Figure 3 is a longitudinal sectional view passing through the region of this angle, the plate being assembled;
- Figure 4 is a cross-sectional view along line IV-IV of Figure 3;
- Figure 5 is a partial view, in plan from above, of a variant of this scaffolding plate;
- Figure 6 shows a variant of the section of the profile constituting one of the side members of such a plate
- Figure 7 is a perspective view, similar to Figure 2, illustrating another embodiment of this scaffolding plate
- Figure 8 is another perspective view of the region of an angle of a scaffolding plate according to the invention, more particularly illustrating the fixing of the plinth;
- Figure 9 is an exploded perspective view, corresponding to part of Figure 8.
- the invention relates to a scaffolding plate which comprises a rectangular support frame 1, of elongated shape, and a floor 2.
- the support frame 1 consists of two beams 3, constituted by extruded aluminum profiles, and two end crosspieces 4, formed by other extruded aluminum profiles.
- the scaffolding plate also has, at each of its ends, a pair of hooks 5 provided for its positioning on the tubular steel structure (not shown) of the scaffolding.
- this scaffolding plate is again provided with a plinth 6, extending along one of its long sides.
- each aluminum profile, constituting a beam 3 of the frame 1 has a substantially triangular, but asymmetrical cross section, the tip of which is turned downwards.
- This profile of generally tubular conformation, thus comprises a substantially horizontal upper face 7 (corresponding to the base of the triangular section), an external inclined flank 8 (corresponding to one side of the triangular section), and an internal inclined flank 9 ( corresponding to another side of the triangular section).
- the profile of the spar 3 forms a longitudinal groove 10, into which is inserted a longitudinal edge of the floor 2, made of plywood, the upper face 7 of the profile thus extending the surface of the floor 2.
- the profile of the spar 3 forms a longitudinal groove 11, of substantially circular section, open downwards.
- the tubular conformation of the profile constituting the spar 3 defines an interior space 12.
- Each aluminum profile, constituting an end cross member 4 of the frame 1, has a substantially rectangular cross section, its configuration also being tubular. At the two ends of this cross-section 4, in the vertical walls of the latter, are provided holes 15 located in correspondence.
- each spar 3 receives a continuous steel rod 16, extending over the entire length of the spar 3 and serving as reinforcement means as well as means for fixing the end crosspieces 4.
- the two ends of each steel rod 16 have a thread 17.
- the hooks 5 are located in the extension of the side members 3.
- hooks 5 have a base pierced with a hole 19, and threaded onto the threaded end of the steel rod 16 , in front of the cross member 3.
- the tightening of the nut 18 ensures the simultaneous fixing of the cross member 4 and the hook 5.
- FIGS. 1 and 5 illustrate a variant in which the hooks 5 have, with respect to the side members 3, a position offset towards the inside.
- the steel rods 16 and the nuts 18 only ensure the assembly of the side members 3 and the cross members 4.
- the hooks 5 are here fixed separately on the corresponding end cross members 3, in particular by means of bolts (here not represented).
- the end crosspiece 4 is interrupted along a vertical plane which corresponds, substantially, to the median of the triangular section of the spar 3.
- the interior space 12 of the profile constituting this spar 3 is thus made accessible , and allows the introduction of a corner piece 20, of synthetic material or other material, clearly visible in FIG. 2.
- the corner piece 20 comprises a body 21, and two tenons 22 and 23 arranged at right angles .
- the first tenon 22 is engaged in a housing 24 at one end of the cross-member 4.
- the second tenon 23 is engaged in the interior space 12 of the profile constituting the beam 3, and more particularly in the part of this interior space 12 delimited by the outer inclined flank 8 and by the two superimposed ribs 13 and 14.
- the corner piece 20 is first engaged in the housing 24 of the cross member 4, then introduced into the interior space 12 of the spar 3, and it automatically finds itself blocked when the nut 18 is tightened on the thread 17 of the rod 16.
- the body 21 of the corner piece 20 has a rounded outer face.
- the upper face of the body 21 has a housing 25, here of cylindrical shape, designed to receive a retaining rod 26 fixed to the end of the plinth 6 - see also FIG. 1.
- the corner piece 20 provides mechanical locking between the cross member 4 and the spar 3.
- the forces exerted on the plywood floor 2, inserted in the longitudinal groove 10 of the profile of the spar 3 would tend to tilt this profile inward, relative to a pivot axis formed by the steel rod 16.
- the corner piece 20 whose second stud 23 has a profile adapted to that of the spar 3 prevents this tilting and ensures blocking of the assembly.
- the aluminum profile constituting the beam 3 always has a triangular section, with the tip facing downwards, but this profile has two longitudinal grooves.
- a longitudinal groove 11 of circular section is provided in the lower part of the profile (tip of the triangular section).
- Another longitudinal groove 27 is formed in the upper part of the profile of the beam 3, under its upper face 7.
- the cross-member 4 has holes 15 at its ends located in correspondence.
- the fixing of the crosspiece 4 on the beam 3 can be produced by means of two dowels 28 and two screws 29.
- FIGS. 8 and 9 which represent the region of an angle of the scaffolding plate, show more precisely an embodiment of the corner piece 20, with its body 21, its two tenons 22 and 23, and its housing 25 which receives the retaining rod 26 fixed to the end of the plinth 6.
- FIG. 8 clearly shows how the corner piece 20, put in place, closes the angle of the two sections constituting respectively the spar 3 and the cross member 4.
- FIG. 9 shows the detail of the means for fixing one of the hooks 5, when these are offset with respect to the side members 3, these fixing means comprising a bolt 30 engaged through holes 31 in the cross member 4.
- the invention is not limited to the sole embodiments of this scaffolding plate which have been described above, by way of examples; on the contrary, it embraces all the variants respecting the same principle.
- material changes can be envisaged for certain components, without departing from the main inventive idea.
- the characteristics relating to the corner pieces in particular the use of these corner pieces for fixing the plinths, are applicable independently of the use of the reinforcing rods housed in the side members.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
- Ladders (AREA)
- Movable Scaffolding (AREA)
- Pallets (AREA)
- Vehicle Step Arrangements And Article Storage (AREA)
- Forklifts And Lifting Vehicles (AREA)
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9501060 | 1995-01-25 | ||
FR9501060A FR2729692A1 (fr) | 1995-01-25 | 1995-01-25 | Plateau d'echafaudage |
PCT/FR1996/000119 WO1996023116A1 (fr) | 1995-01-25 | 1996-01-24 | Plateau d'echafaudage |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0805904A1 true EP0805904A1 (de) | 1997-11-12 |
EP0805904B1 EP0805904B1 (de) | 1998-12-16 |
Family
ID=9475650
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96901846A Expired - Lifetime EP0805904B1 (de) | 1995-01-25 | 1996-01-24 | Gerüstboden |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP0805904B1 (de) |
AT (1) | ATE174651T1 (de) |
AU (1) | AU706743B2 (de) |
CA (1) | CA2210952A1 (de) |
DE (1) | DE69601155T2 (de) |
ES (1) | ES2127617T3 (de) |
FR (1) | FR2729692A1 (de) |
WO (1) | WO1996023116A1 (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2770552B1 (fr) * | 1997-10-31 | 2000-01-21 | Lacroix Duarib | Plancher pour echafaudage |
BE1013766A5 (fr) * | 1998-10-02 | 2002-08-06 | Plasman Yvon | Plancher pour echaufaudage. |
GB2450756B8 (en) * | 2007-07-06 | 2012-08-01 | Ability Internat Ltd | A hook for connecting to a scaffolding tube |
EP2511444A1 (de) * | 2011-04-14 | 2012-10-17 | Hofin GmbH | Plattenartiges Gehbelagelement für Gerüste |
DE102011054962A1 (de) * | 2011-10-31 | 2013-05-02 | Novo-Tech Gmbh & Co. Kg | Gerüst und Boden für ein Gerüst |
TR201706449A2 (tr) * | 2017-05-02 | 2017-09-21 | Sevencan Hakan | Kaynaksiz kapakli platform gövde çerçevesi̇ ve bu çerçeveni̇n üreti̇m yöntemi̇ |
IT201800007803A1 (it) * | 2018-08-03 | 2020-02-03 | Alberto Tintori | Tavola per ponteggi |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2630077A1 (de) * | 1976-07-03 | 1978-01-12 | Bernhard Glatz | Geruestbohle |
FR2527251A1 (fr) * | 1982-05-18 | 1983-11-25 | Self Lock Echafaudages | Element de construction comportant une armature realisee au moyen de longerons et traverses, en particulier pour planchers d'echafaudage |
DE8704996U1 (de) * | 1986-05-02 | 1987-06-04 | Beier, Joachim, 7336 Uhingen | Gerüst |
US4825976A (en) * | 1988-08-31 | 1989-05-02 | Bil-Jax, Inc. | Scaffolding platform |
US5141078A (en) * | 1991-10-10 | 1992-08-25 | Aluma Systems Corp. | Scaffold deck |
-
1995
- 1995-01-25 FR FR9501060A patent/FR2729692A1/fr active Granted
-
1996
- 1996-01-24 EP EP96901846A patent/EP0805904B1/de not_active Expired - Lifetime
- 1996-01-24 ES ES96901846T patent/ES2127617T3/es not_active Revoked
- 1996-01-24 AU AU46263/96A patent/AU706743B2/en not_active Ceased
- 1996-01-24 WO PCT/FR1996/000119 patent/WO1996023116A1/fr active IP Right Grant
- 1996-01-24 CA CA002210952A patent/CA2210952A1/fr not_active Abandoned
- 1996-01-24 DE DE69601155T patent/DE69601155T2/de not_active Expired - Fee Related
- 1996-01-24 AT AT96901846T patent/ATE174651T1/de not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO9623116A1 * |
Also Published As
Publication number | Publication date |
---|---|
CA2210952A1 (fr) | 1996-08-01 |
AU706743B2 (en) | 1999-06-24 |
ES2127617T3 (es) | 1999-04-16 |
AU4626396A (en) | 1996-08-14 |
EP0805904B1 (de) | 1998-12-16 |
ATE174651T1 (de) | 1999-01-15 |
DE69601155D1 (de) | 1999-01-28 |
WO1996023116A1 (fr) | 1996-08-01 |
DE69601155T2 (de) | 1999-07-22 |
FR2729692A1 (fr) | 1996-07-26 |
FR2729692B1 (de) | 1997-03-07 |
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