EP2154315A1 - Verschalungsvorrichtung für einen Boden und vertikaler Mast zum Aufheben einer Verschalung für einen Boden - Google Patents

Verschalungsvorrichtung für einen Boden und vertikaler Mast zum Aufheben einer Verschalung für einen Boden Download PDF

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Publication number
EP2154315A1
EP2154315A1 EP09165183A EP09165183A EP2154315A1 EP 2154315 A1 EP2154315 A1 EP 2154315A1 EP 09165183 A EP09165183 A EP 09165183A EP 09165183 A EP09165183 A EP 09165183A EP 2154315 A1 EP2154315 A1 EP 2154315A1
Authority
EP
European Patent Office
Prior art keywords
mast
formwork
pins
carriage
outside
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Withdrawn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
EP09165183A
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English (en)
French (fr)
Inventor
Thierry Demingeon
Jean-Paul Moulins
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.)
Sateco Plancher
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP2154315A1 publication Critical patent/EP2154315A1/de
Withdrawn legal-status Critical Current

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    • 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
    • E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
    • E04G11/36—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for floors, ceilings, or roofs of plane or curved surfaces end formpanels for floor shutterings
    • E04G11/48—Supporting structures for shutterings or frames for floors or roofs
    • E04G11/486—Dropheads supporting the concrete after removal of the shuttering; Connecting means on beams specially adapted for dropheads
    • 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
    • E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
    • E04G11/36—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for floors, ceilings, or roofs of plane or curved surfaces end formpanels for floor shutterings
    • E04G11/38—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for floors, ceilings, or roofs of plane or curved surfaces end formpanels for floor shutterings for plane ceilings of concrete

Definitions

  • the invention relates to a slab formwork device and a vertical mast for lifting a slab formwork.
  • the invention relates to the general technical field of the construction of solid slabs in cast-in-place concrete. It relates more specifically to the technical field of devices for assembling a slab formwork ready lower floor and bring it to the final height corresponding to the height of the slab to achieve.
  • the slab formwork consists of a support structure on which rests a formwork skin intended to receive the concrete.
  • the support structure consists of primary beams supporting the entire load and secondary beams resting on said primary beams.
  • Plywood forming the formwork skin are positioned on the secondary beams.
  • Primary and secondary beams, as well as plywood, are standard formwork elements used around the world.
  • the document DE 1759423 (KISTLER ) teaches to use a telescopic mast to lower the formwork and then tilt to reduce its size.
  • the document US 3,700,070 (CALABY ) teaches to use a formwork mounted on a folding mechanism. This type of mechanism is also described in the documents FR 2.723.758 (DINGLER ) FR2,597,534 (LETRICHEZ ) US 5,616,349 (SASAKI ) or US 4,148,852 (DASHEW ).
  • the document FR 2.760.482 (RICARD ) relates to a formwork device using a complex modular bearing system.
  • Standard formwork comprising primary beams supporting a formwork skin are therefore not compatible with the lifting devices known from the prior art.
  • a slab formwork device comprising primary beams supporting a formwork skin, said device comprising several vertical poles of fixed length and equipped with elements for supporting said formwork, said elements of supports being able to move vertically along said masts between a low position where said formwork is located near the lower floor and a high position where said formwork is located at the height of the slab to achieve.
  • the formwork is in the high position, the upper end of the poles pass through said formwork.
  • the slab has holes corresponding to the passages of the masts. It is therefore necessary to provide a new formwork to fill these holes after disassembly of the masts. It is easy to understand that this additional operation is particularly restrictive and time consuming.
  • the main objective of the invention is to improve the slab formwork device described in the document DE 817515 (REINARTZ ), that after the casting of the slab and after stripping, said slab is finished, no additional operation being necessary.
  • Another object of the invention is to provide a universal slab formwork device suitable for standard formwork elements, simple design, widely known to construction workers, and ensuring the safety of the workers who handles it.
  • Yet another object of the invention is to provide a mast for lifting a slab formwork, to easily achieve the aforementioned objectives.
  • a geared motor advantageously controls the raising and lowering of the support elements, the different geared motors being synchronized with each other.
  • the masts used in battery are therefore synchronous in their function of vertical displacement.
  • a single worker can control the rise or fall of the formwork.
  • the pins project from the outside of the masts and are integral with a carriage mounted to move in translation along said masts, outside of the latter, the raising and lowering of said carriage being controlled by means of a hoist winch fixed on said carriage, a cable, a band or a chain attached to the upper end of said masts winding around said winch.
  • the pins project from the outside of the poles and are integral with a nut mounted to move on a vertical threaded rod disposed inside said poles, the rotation of said rod raising or lowering said nut.
  • the threads of the threaded rod are inclined by 2 ° to 5 ° relative to the horizontal so as to stabilize the phases of assembly and disassembly of the formwork: in case of sudden stop rotation of the rod , the nut remains perfectly in position.
  • the pins protrude outside the poles and are integral with a cable, a band or a chain arranged vertically inside said mast, said cable, said strip or said chain moving so as to raise or lower said pins.
  • the pins are projecting outside the masts and are integral with a carriage mounted to move in translation along said masts, outside of these, the raising and lowering of said carriage being controlled through a solidarity gear said carriage and meshing on a rack fixed longitudinally outside said masts.
  • This mast replaces the main stay and stability tripod usually used in traditional formwork structures. It provides the same porting and stability functions, plus a lifting function during the formwork phase and a descent function during the dismantling phase.
  • the slab formwork device object of the invention comprises a series of vertical poles 1 which are arranged in a lower cell where the slab is to be cast.
  • the masts 1 are independent of each other and rest on the floor of this cell.
  • the masts 1 are tubular elements of fixed or adjustable length, advantageously between about 2 m and about 3 m and preferably between 2.1 m and 2.3 m, of circular section, preferably of diameter between 5 cm and 15 cm. A square, rectangular or other section could also be provided in an equivalent manner.
  • the upper end of the mast 1 is closed and the lower end is provided with a base 10 or a tripod ensuring its good stability on the lower floor.
  • the base 10 may incorporate retractable wheels so that the mast 1 can be easily moved from one formwork cell to the other, without lifting means.
  • the material preferentially used for the masts 1 is steel, but other materials such as plastics having good mechanical strengths, especially compression, can be envisaged.
  • the masts 1 are equipped with elements 2 intended to support the formwork.
  • the formwork is a standard formwork usually used on construction sites. This is not a formwork specifically designed for the device of the present invention.
  • the support structure of the formwork consists of primary beams 30 for supporting the entire load and secondary beams 31 (shown in dotted lines on the figure 1 ) resting on said primary beams.
  • the primary beams 30 are for example metal beams having a T-section.
  • the secondary beams 31 are for example conventional wooden beams with square or rectangular section. According to the usual practice of the workers, the secondary beams 31 are arranged perpendicularly to the primary beams 30.
  • the secondary beams 31 are simply placed on the primary beams 30, without mechanical connection.
  • plywood 32 forming the formwork skin are then positioned on the secondary beams 31.
  • the plywood 32 are simply placed on the secondary beams 31, without mechanical connection.
  • Beams primary 30 and secondary 31 as well as plywood 32 are standard formwork elements implemented in a traditional way.
  • the support elements 2 comprise pins 20 on which the primary beams 30 rest. These pins 20 project from the outside of the masts 1.
  • the pins 20 are advantageously arranged symmetrically with respect to the mast 1 so that each mast supports two primary beams 30. This arrangement has the advantage of balancing the loads on the masts 1. It could however be envisaged to use only one pin 20 per mast 1.
  • the primary beams 30 are simply placed on the pins 20, without mechanical connection.
  • the pins 20 may however comprise at their end a vertical return 21 for blocking the lateral movement of the primary beams 30.
  • the pins 20 may include a cavity having a shape complementary to the primary beams 30 to maintain in position these last.
  • the skilled person may also provide any locking means in position of the primary beams 30, for example straps, if it deems necessary.
  • the pins 20 project from the outside of the poles 1 and are integral with a carriage 22 mounted to move in translation along said poles, outside of these.
  • the carriage 22 is made of metal.
  • the raising and lowering of the carriage 22 along the mast 1 are controlled by means of a hoist winch 60 fixed to said carriage, a cable, a band or a chain 61 fixed to the upper end of said mast wrapping around said winch.
  • the support elements 2 are located substantially at the height of the slab to achieve.
  • the support members 2 may either exceed the upper end of the mast 1, or be at the same height as said end , or be slightly below the latter (a few centimeters). In the latter case, it is the cumulative height of the primary and secondary beams 30 which implies that the formwork skin will exceed the upper end of the mast 1.
  • the carriage 22 is dimensioned such that in the high position, the forming skin 32 exceeds the upper end of the mast 1 and is positioned on its upper face at the height of the floor to achieve. In the low position, the carriage 22 stops at a height of the lower floor of between about 80 cm and about 1.5 m.
  • the winch 60 is fixed under a plate 23 secured to the carriage 2 and located outside the mast 1.
  • the plate 23 is located in the same horizontal plane as the pins 20, but is perpendicular to the latter, so that the winch 60 is located between the two primary beams 30.
  • the winch 60 is a conventional winch known to man of the craft, for example consisting of a pulley rotating about its axis with the aid of an electric gear motor and around which the cable, the band or the chain 61 is wound.
  • the end of the cable, the band or chain 61 is fixed on a plate 12 welded to the upper end of the mast 1.
  • the other end winds around the winch passing through the plate 23.
  • These end-of-stroke detectors are advantageously arranged on a plate 24 opposite the plate 23 supporting the winch 60.
  • pawls may be simple pins placed manually by the workers and crossing the poles 1 below the carriages 22 when they are in the up position.
  • an electromagnetic actuator which is triggered automatically when the carriage 22 reaches the high position, said actuator being configured to lock said carriage in this position and to prevent an eventual fall of said carriage.
  • the pins 20 are integral with a nut 40 mounted to move on a vertical threaded rod 41 disposed inside the poles 1.
  • Vertical grooves 11 are formed in the mast 1 for the passage of the pins 20. These grooves 11 are configured to block the rotation of the pins 20 and thereby the nut 40, so that the rotation of the threaded rod 41 makes up or down said nut and thereby the primary beams 30 and thus the entire formwork.
  • the grooves 11 can almost reach the upper end of the mast 1, so that in the high position, the support elements 2 are located substantially at the height of the slab to achieve.
  • the lower end of the grooves 11 are at a lower floor height of between about 80 cm and about 1.5 m. It is indeed not useful that they go lower, the goal being to assemble the formwork at a suitable working height, the workers remaining on the lower floor.
  • the threaded rod 41 is connected at its lower end to a geared motor 42 for rotating it.
  • the geared motor can be directly integrated in the mast 1 or be placed outside. In the latter case, a gear system will connect the lower end of the rod 41 to the output of the geared motor 42.
  • the upper end of the rod 41 is in turn left free to rotate, preferably connected to a rolling bearing 43.
  • the masts 1 have a stop security to ensure the position of the formwork regardless of the elevation phase.
  • the threads of the threaded rod 41 are preferably inclined by 2 ° to 5 ° relative to the horizontal so as to stabilize the assembly and disassembly phases of the formwork. The applicant has noted that this inclination of the threads makes it possible, in the event of stopping the power supply of the geared motor 42, to prevent the nut 40 from descending along the rod 41 and thereby the formwork, said nut being indeed locked in position.
  • the pins 20 are integral with a cable, a strip or a chain arranged vertically inside the mast 1, said cable, said strip or said chain moving in a manner to raise or lower said pins.
  • the cable, the belt or the chain are arranged with pulleys and / or gears rotated by a geared motor disposed in or outside the mast 1.
  • the pins 20 project from the outside of the poles 1 and are integral with a carriage 22 mounted to move in translation along said poles, outside of these.
  • the raising and lowering of the carriage 22 along a mast 1, are controlled by means of a gear 70 integral with said carriage and meshing with a rack 71 fixed longitudinally to the outside of said mast.
  • the gear 70 is preferably located under the pins 20.
  • the gear 70 is rotated via a geared motor 72 fixed under the pins 20. It may be advantageous to provide limit switches up / down 74 to ensure that the geared motor 72 stops automatically drive the gear 70 when the carriage 22 reaches the upper end of the mast 1 or the position of setting place of the formwork. It may also be advantageous to provide a non-return ratchet locking the gear 70 in position to prevent the possible fall of the carriages 22, and thus the formwork, when they are in the high position.
  • the winch 60 By rotating the winch 60, the geared motor 70, the threaded rods 41 or cables, bands or chains, it is therefore possible to raise and lower the support elements 2 and thus the entire formwork.
  • all the geared motors which allow the displacement of the support elements 2 are synchronized with each other. In this way, the rise and fall of the formwork can be controlled automatically by a single operator, via a single control box connected to each geared motor.
  • the position sensor may consist of a wheel with exciter 62 rolling on the mast 1.
  • a detector 63 arranged with the wheel 62 can detect the direction (up or down) and the number of turns of said wheel, and therefore the linear position of the support elements 2.
  • All the detectors 63 are connected to a programmable logic controller, or an electronic central unit, making it possible to analyze the position of each support element 2 and to control the different geared motors accordingly, in order to synchronize their position. moving with the minimum difference.
  • the wheel 62 and the detector 63 can be used for each variant embodiment.
  • the device object of the invention makes it possible to set up the formwork in a very simple and perfectly secure way for the workers.
  • This implementation will now be described in more detail by referring to Figures 1 to 4 .
  • the masts 1 are placed in the cell where the slab is to be made ( figure 1 ).
  • the number and the distribution of the masts 1 comply with the usual rules of formwork, according to the weight of the slab concrete, the flexural strength of the primary and secondary beams 31 and the maximum boom allowed in the construction market.
  • the support elements 2 are then brought back to the lower position, that is to say near the lower floor, to a height of between about 80 cm and about 1.5 m.
  • the primary beams 30 are first laid on the support members 2, then the secondary beams 31 are placed on said primary beams.
  • the plywoods 32 forming the formwork skin can then be positioned on the secondary beams 31 ( figure 2 ).
  • the plywoods 32 are positioned so as to leave linear free hoppers 50 to the right of the masts 1, the latter thus passing through the formwork in the low position.
  • the linear hoppers 50 allow the formwork to move vertically along the masts 1.
  • These hoppers 50 are further reduced width (20 cm to 30 cm) to prevent a man from falling through.
EP09165183A 2008-07-25 2009-07-10 Verschalungsvorrichtung für einen Boden und vertikaler Mast zum Aufheben einer Verschalung für einen Boden Withdrawn EP2154315A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0855142A FR2934291B1 (fr) 2008-07-25 2008-07-25 Dispositif de coffrage de dalle et mat vertical pour lever un coffrage de dalle

Publications (1)

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EP2154315A1 true EP2154315A1 (de) 2010-02-17

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EP09165183A Withdrawn EP2154315A1 (de) 2008-07-25 2009-07-10 Verschalungsvorrichtung für einen Boden und vertikaler Mast zum Aufheben einer Verschalung für einen Boden

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EP (1) EP2154315A1 (de)
FR (1) FR2934291B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020150539A1 (en) * 2019-01-18 2020-07-23 Brand Shared Services Llc Formwork system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2967181B1 (fr) 2010-11-08 2014-01-17 B Nova Dispositif pour deplacer une plateforme de coffrage de dalle et/ou de balcon.

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE817515C (de) * 1948-10-02 1951-10-18 Peter Joseph Reinartz Vorrichtung zum Errichten von Betonbauwerken und deren Teilen sowie Anwendungsverfahren

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE817515C (de) * 1948-10-02 1951-10-18 Peter Joseph Reinartz Vorrichtung zum Errichten von Betonbauwerken und deren Teilen sowie Anwendungsverfahren

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020150539A1 (en) * 2019-01-18 2020-07-23 Brand Shared Services Llc Formwork system
US11976477B2 (en) 2019-01-18 2024-05-07 Brand Shared Services Llc Formwork system

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Publication number Publication date
FR2934291B1 (fr) 2012-02-10
FR2934291A1 (fr) 2010-01-29

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