EP2450501A1 - Vorrichtung zum Verschieben einer Verschalungsplattform für eine Bodenplatte und/oder einen Balkon - Google Patents

Vorrichtung zum Verschieben einer Verschalungsplattform für eine Bodenplatte und/oder einen Balkon Download PDF

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Publication number
EP2450501A1
EP2450501A1 EP11008859A EP11008859A EP2450501A1 EP 2450501 A1 EP2450501 A1 EP 2450501A1 EP 11008859 A EP11008859 A EP 11008859A EP 11008859 A EP11008859 A EP 11008859A EP 2450501 A1 EP2450501 A1 EP 2450501A1
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EP
European Patent Office
Prior art keywords
platform
formwork
struts
height
sliding
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Withdrawn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
EP11008859A
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English (en)
French (fr)
Inventor
Thierry Demingeon
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
B NOVA (SAS)
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 B NOVA (SAS) filed Critical B NOVA (SAS)
Publication of EP2450501A1 publication Critical patent/EP2450501A1/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Withdrawn legal-status Critical Current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
    • 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
    • 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
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/14—Conveying or assembling building elements
    • E04G21/16—Tools or apparatus
    • E04G21/163—Jacks specially adapted for working-up building elements
    • 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
    • E04G25/00—Shores or struts; Chocks
    • E04G25/04—Shores or struts; Chocks telescopic
    • E04G2025/047—Shores or struts; Chocks telescopic which telescoping action effected by a piston

Definitions

  • the invention relates to a device for moving a platform slab formwork and / or balcony.
  • the invention also relates to a system and method for forming a slab and / or a balcony using such a device.
  • the invention relates to the general technical field of the construction of concrete slabs or balcony poured on site. It relates more specifically to the technical field of devices for assembling a slab formwork near the lower floor and bring it to the final height corresponding to the height of the slab or balcony to achieve.
  • the formwork On most sites, the formwork consists of a support structure on which rests a formwork skin intended to receive the concrete.
  • the support structure is generally constituted by primary beams resting on props and 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 patent document FR 2,934,291 (DEMINGEON-MOULINS) relates to a universal slab formwork device comprising several vertical poles of fixed length and equipped with elements intended to support said formwork.
  • the support elements are able to move vertically along the masts between a low position where the formwork is located near the lower floor and a high position where the formwork is located at the height of the slab to achieve.
  • the support elements comprise pins on which the primary beams rest: in low position, the masts through the formwork skin, the latter leaving free linear hoppers to the right of said masts; and in the high position, said formwork skin protrudes from the upper end of said masts, compensation strips coming to plug said linear hoppers.
  • the formwork device described in this document has drawbacks. Indeed, the fact that the vertical poles pass through the formwork skin requires relining the linear free hoppers. This is not only an extra costly step in time, but also prevents the entire formwork from being built in the down position.
  • this device being composed of a barrel and a single coullsseau, it is not possible to install the formwork platform at a height ergonomic of about 1 m, and to raise it to a current service height of about 2.5 m. This type of device therefore forces workers to work at height, in fatiguing and risky working positions.
  • the main objective of the invention is to propose a device for moving a formwork platform of the type described in the patent document.
  • FR 2.823.521 (BOUYGUES), but with which the minimum ergonomic height of installation allows operators to properly install the formwork platform, whatever the height of service envisaged, easily and safely.
  • Another objective of the invention is to propose a displacement device making it possible to optimize the number of struts to be motorized on a construction site.
  • the solution proposed by the invention is a device for moving a platform slab formwork and / or balcony, said device comprising telescopic struts on which is intended to rest said platform, said struts being configured to move said platform, without the cross, between a folded installation position and an extended position where the platform reaches a service height, said struts comprising sliding elements interlocking in one another, or on the other telescopically, the sliding of said elements being ensured by at least one drive means specific to each stay,
  • each said stay is formed of at least two pairs of sliding elements, each said pair of elements.
  • sliders with its own means of motorization By being formed of at least two pairs of sliding elements (i.e. at least three sliding elements), each strut can be further folded so that it is now possible to install the platform formwork at an ergonomic height which is much lower than that obtained with the devices of the prior art mentioned above.
  • the spread extent of the forestay is such that the platform can be raised to a service height that is at least twice the installation height.
  • the use of at least two engines especially when it comes to cylinders, reduces the size of each of said engines, and thus reduce the installation height of the platform. The work of the workers is facilitated.
  • the motorization means are preferably removable and arranged outside the sliding elements of said strut.
  • telescopic props comprising at least three sliding elements makes it possible to reduce the installation height of the platform when said masts are in the folded position.
  • the platform can thus be set up for operators at an ergonomic height, even if the service height is high.
  • Each telescopic stay may, however, include more than two sliders sliding and fitting into, or on, each other (i.e., be composed of more than three slider members).
  • motorization means are provided which ensure the movement of a slider relative to the slider which precedes it.
  • a slide assembly / motorization means supports and ensures itself the movement of the upper equivalent assembly.
  • each strut is advantageously dimensioned so that in folded position, said formwork platform can be installed at a height less than 1.80 m with respect to the ground, preferably at a height of between 1 m and 1 m. , 7 m, and in the deployed position the height of said platform can be at a service height of more than 2.40 m.
  • the sliding elements of the struts have a section adapted to block their rotation along their axis of movement, during the sliding phases of said elements.
  • the one or more motorization means comprise a worm or screw / nut system configured to form a self-locking brake in case of stopping said motorization means.
  • the self-locking brake prevents the telescopic props to fold and the platform to fall.
  • Another aspect of the invention relates to a formwork system comprising a formwork platform and a device for moving said platform according to one of the preceding characteristics.
  • bracing members are provided for blocking said primary and secondary beams together.
  • These bracing members are in the form of a bar resting on two successive secondary beams, said bar being provided with a deformable fastening element, or adjustable in size, fixing under a primary beam on which rests the two said secondary beams. This allows three beams to be bonded together at the same time to maintain the platform in a parallelogram configuration and to provide an anti-tilting function of the beams. It should be noted that these bracing members are independent of the design of the telescopic props and could very well be used with other formwork devices.
  • the upper end of the telescopic props may be provided with a support head configured to support more than one line of primary beams.
  • the telescopic props can be folded so that the formwork platform can be dismantled at a height of less than 1.8 m from the ground.
  • the lifting device object of the invention comprises a series of telescopic props 1 which are generally arranged in a lower cell where a slab or a balcony must be cast.
  • the struts 1 are independent of each other and rest on the floor of this cell.
  • the struts 1 make it possible to move a formwork platform, without crossing it, between a folded installation position and an extended position where said platform reaches a service height.
  • the number of struts 1 associated with each formwork platform is scalable according to the surface of the latter. In practice, this number can vary from four to ten or more.
  • the formwork platform is standard, of the type usually used on construction sites. Indeed, the device of the invention adapts to any type of formwork platform market, and is placed below the structure of said platform. It is not a specific platform.
  • the structure of the platform may consist of primary beams 30 for supporting the entire load and secondary beams 31 resting on said primary beams.
  • the primary beams 30 are for example metal beams having a T-section 31.
  • the secondary beams 31 are for example conventional beams of wood or metal, T-shaped, square or rectangular. According to the usual practice of the workers, the secondary beams 31 are arranged perpendicular to the primary beams 30.
  • the upper end of the struts 1 is provided with a support head 33 on which rests the primary beams 30, without mechanical connection.
  • the support heads 33 may, however, comprise at their end a vertical return 331 making it possible to block the lateral movement of the pimetral beams 30.
  • the support heads 33 may comprise a recess having a shape complementary to the primary beams 30 so as to to maintain in position these.
  • the skilled person may also provide any locking means in position of the primary beams 30, for example straps, if it deems necessary.
  • the support heads 33 may be removable (they are typically placed on the upper end of the last sliding element) and interchangeable depending on the configuration of the formwork platform to be moved (for example if said platform comprises beams, or beams + panels or panels alone).
  • the support heads 33 may be configured to support more than one line of primary beams 30 (two, three or four rows of beams).
  • the secondary beams 31 may simply be placed on the primary beams 30 with or without a mechanical connection. Referring to the figure 7 plywood 32 or panels, forming the formwork skin, are then positioned on the secondary beams 31. In principle, the plywood 32 are placed on the secondary beams 31, with or without mechanical connection.
  • the primary and secondary beams 30 and 31 as well as the plywood 32 are standard formwork elements set up in the traditional way. The platform could however consist of formwork panels, combined or not with beams.
  • bracing members between the legs of the telescopic props 1.
  • These bracing members may for example consist of link braces, of the type that are usually used for the bracing of shoring towers or scaffolding.
  • bracing member 300 is schematized on the figure 8 and has the reference 300. It is in the form of a bar 301 bearing on two secondary beams 31 successive, said bar being provided with a deformable fastening element 302, or adjustable in size, being fixed under a beam primary 31 on which rests the two said secondary beams. With only one bracing member 300, it is possible to connect three beams to each other, which increases the rigidity of the shuttering platform in the horizontal plane and ensures anti-tilting of the connected beams.
  • the bracing member 300 is preferably made of metal.
  • the bar 301 may have a rectangular, square, oval or round section.
  • the fastening element 302 may be in the form of a folded metal blade or a bow, fixed perpendicular to the bar 301. Front view, the assembly has substantially the shape of a T.
  • the bracing members 300 can be assembled from the construction of the ergonomically height formwork platform for a worker (about 1m), or added after hoisting the platform to a height accessible by a worker (about 2 m), without the need for a scaffolding or ladder, and for higher heights, using a pole.
  • the bracing members 300 may be provided with a strap, chain, cable or any other link during, fixed on the fastening element 302 or on the bar 301. This link during, when it is stretched, makes it possible to plate the formwork platform to the ground or against an adjacent vertical wall or against a pole or forestay. It is also possible to install on certain bracing members, straps, carabiners, or any other equivalent attachment means for hanging a stop-fall net or sprocket. It is necessary in this case to provide a significant resistance of the attachment means to resume the dynamic forces induced by the fall of a worker or heavy equipment.
  • a primary junction beam 34 can be arranged between two struts 1.
  • Two additional primary beams 30 overhang cantilevered on each side of the struts 1.
  • the adjustment of the total length is adjustable by changing the length of overlap between the two beams 30 and the junction beam 31. Once the length is defined, these three beams are then bonded, in order to compensate (partially) the cantilever overflowing beams 30.
  • the connection is made by means of a holding device 340 which clamps and locks the beams together.
  • An exemplary embodiment of this holding device 340 is schematized on the figure 11 . It comprises a fixed jaw 341 and a movable jaw 342, both connected to a threaded tie rod 343.
  • the jaws 341, 342 are intended to grip the "overhanging" joists 30.
  • Each jaw 341, 342 is advantageously made from a metal plate shaped so as to maintain the "overhanging" beams 30 in position and block their lateral movement.
  • the fixed jaw 341 is attached to one end of the slide, for example by welding.
  • the movable jaw 342 comprises guides 3420 in which the threaded tie rod 343 slides.
  • a clamping member 344, of the nut type, makes it possible to clamp the movable jaw 342 against the "overflowing" beam 30 on which it bears. Such binding of beams also fulfills a role of anfi-tilting primary primary beams 30.
  • each strut 1 comprises sliding elements which fit into one another or on the other telescopically.
  • each strut 1 is formed of at least two pairs of sliding elements 10, 11, 12 (that is to say at least three sliding elements), each said pair of sliding elements having its own means of motorization M1, M2. Their sliding movement is therefore provided by at least two motorization means M1, M2 specific to each stall.
  • each strut 1 comprises at least one drum 10 resting on the ground, a first slider 11 sliding and fitting into or on said barrel 10, and advantageously at least one second slider 12 sliding and interlocking in or on said first slider 11.
  • the sliding elements 10, 11, 12 are advantageously dimensioned so that in the folded position, the formwork platform can be installed at a height of less than 1.80 m with respect to the ground, preferably a height of between 1 m and 1.7 m.
  • Each sliding element 10, 11, 12 may therefore have a length of between 1 m and 1.7 m, preferably between 1 m and 1.5 m.
  • the formwork platform can be located at a service height of more than 2.40 m, typically between 3 m and 5.1 m.
  • the barrel 10 can be provided with a base or a tripod ensuring its good stability on the lower floor.
  • the base can incorporate retractable wheels so that the strut 1 can be easily moved from one formwork cell to another without lifting means.
  • the sliding elements 10, 11, 12 are preferably made of steel, but other materials such as plastics having good mechanical strengths, especially compression, can be envisaged.
  • the sliding elements 10, 11, 12 are square section elements.
  • each strut is provided with a first motorization means M1 ensuring the sliding movement of the first slider 11 relative to the shaft 10 and a second motorization means M2 ensuring the sliding of the second slide 12 relative to said first slide.
  • each pair of sliding elements barrel / first slide and first slide / second slide has its own motor.
  • These motorization means M1, M2 are preferably removable and arranged outside the sliding elements 10, 11, 12. In the case where there is a shaft and more than two slides, several motorization means ensure the sliding of a slide by compared to the slider that precedes it. In this way, each pair of sliding elements has its own motorization.
  • the struts 1 can remain in place with their means (s) of motorization, in static function support load recovery, during the casting phase and / or drying of the concrete slab.
  • the struts 1 can also be partially disabled by disassembly of their means (s) of motorization and remain in support of static recovery during the operations of reinforcement and concreting concrete slab or balcony. They can also be completely disassembled and be replaced during this phase of recovery of static load by conventional props open to the necessary height of service.
  • the drive means M1, M2 may consist of electric cylinders, mechanical, or hydraulic racks, etc. It is preferred to use electric worm screw jacks which are either connected to a current source available on the site, or equipped with their own power supply (battery, ).
  • the barrel 10 comprises a base 100 on which rests the lower end of the first motorization means M1, which is here a jack. The upper end of this first jack bears against a protruding edge 110 of the first slider 11. In practice, this edge is located at the upper end of the first slider 11, opposite the base 100.
  • the first slider 11 is provided with a projecting element forming a base 110 on which rests the second motorization means M2, which is again a cylinder.
  • This base 110 is disposed outside the shaft 10.
  • the upper end of the second cylinder bears against a projecting edge 120 of the second slide 12. In practice, this edge is located at the upper end of the second slide 12, opposite the base 110.
  • the lower and upper ends of the motorization means M1, M2 are advantageously fixed respectively on the bases or against the edges of the sliding elements 10, 11, 12, by means of easily removable connection, for example simple screw connections.
  • the motorization means M1, M2 advantageously comprise a worm or screw / nut system, for example of the type that are usually used in worm screw jacks.
  • This system is configured to form a self-locking brake preventing the struts 1de to fold and the platform to fall if the drive means are defective or in case of power failure.
  • the worm may have a tapered thread forming a self-locking brake and / or a low pitch (lower than the coefficient of friction screw / nut) and / or threads inclined by 2 ° to 5 °, etc.
  • the drive means M1, M2 may also include any additional element or safety element (for example a safety nut).
  • the drive means M1, M2 can be removable, it is advantageous to adjust the height of the struts 1 and to lock in position the sliding elements 10, 11, 12 independently of said means engine, when said struts are in the deployed position of service and that they are not replaced by conventional props during the pouring and drying phases of the concrete.
  • two sets of adjusting pins 41, 42 are provided.
  • a first pin 41 is used for a rough adjustment of the height.
  • This first pin 41 passes radially through two sliding elements of a stall 1 to block their respective movements.
  • the first pin 41 blocks the second slider 12 relative to the first slider 11 but could be used to block said first slider relative to the shaft 1, or other sliding elements.
  • a series of housings 410 is formed in the sliding elements to be locked and into which the first pin 41 is inserted. The precision of the adjustment is therefore equal to the distance separating two housings 410.
  • a second pin 42 is used for a finer adjustment of the height.
  • This second pin 42 also crosses radially one or more sliding elements of a strut 1 to block their respective movement.
  • the second pin 41 blocks the first slider 11 relative to the barrel 10, but provision could be made to use it to lock the second slider 12 with respect to said first slider or other sliding elements.
  • a series of housings 420 is formed in the sliding elements to be locked and in which the second pin 42 is introduced. It is important, depending on the configuration of the floor on which the struts 1 and / or depending on the configuration of the slab or balcony to achieve, to be able to accurately adjust the deployment height of the props 1, this height may vary from one strut to another.
  • one of the housings of at least one of the sliding elements is configured to allow a longitudinal displacement of the second pin 42.
  • This displacement induces a longitudinal displacement of one of said elements sliding.
  • the barrel 10 comprises a housing 421 allowing such a displacement.
  • This is for example an oblong hole, or a groove, oriented in the direction of the length of the barrel 10 and made at the upper end of said barrel.
  • the second pin 42 rests on an adjusting cam 43 whose profile makes it possible to move said pin longitudinally in the housing 421.
  • This cam 43 whose profile is schematized on the figure 6 , rotatably mounted on the sliding element which comprises the housing 421.
  • the cam 43 By rotating the cam 4, its profile will move the second pin 42 in the housing 421 and thus move up or down the first slide 11 (or another sliding element in which said pin would be housed).
  • the cam 43 is locked in position by a nut 430.
  • the arrow F schematizes the force of the second pin 42 on the cam 43
  • the arrow M schematizes the resulting torque.
  • the profile of the cam 43 is such that the angle " ⁇ " of its tangent to the point of contact with the second pin 42 with the vertical is less than the angle " ⁇ " slip of the torque of the cam / pin material. This ensures that, in case of tendency to slip cam / pin, the cam 43 has a tendency to rotate in the sense that it will tighten the nut 430 which immobilizes it, and thus make it self-locking.
  • the device object of the invention makes it possible to set up the formwork platform in a very simple and perfectly secure way for the workers. This implementation will now be described in more detail.
  • the struts 1 are available in the cell where the slab is to be made, or outside for the realization of a balcony.
  • the number and the distribution of the struts 1 comply with the usual rules of formwork, according to the weight of the slab or balcony concrete, the bending strength of the primary and secondary beams 31 and the maximum deflection admitted to the construction market.
  • the struts 1 are folded so that the formwork platform can be installed at an ergonomic height for the man, advantageously to a height less than 1.8 m from the ground, preferably at a height of between about 80 cm and about 1.5 m, preferably a height of about 1 m.
  • the workers can then easily build the entire formwork platform (possibly excluding some finishing operations such as the lateral cut-outs of the formwork skin and the wedging), by perfectly adapting the structure of the latter to the configuration of the slab or slab. balcony to form.
  • the primary beams 30 are first laid on the support heads 33, then the secondary beams 31 are placed on said primary beams, and optionally bonded by the bracing members 300.
  • the plywoods 32 forming the formwork skin can then be positioned on the secondary beams 31 without leaving any free linear hopper to the right of the struts 1, the latter not passing through the formwork platform in the folded position.
  • the struts 1 are deployed in one or more steps to hoist said platform to reach the service height, that is to say at the height of the slab or balcony to achieve.
  • the drive means of the struts are synchronized, only one worker is necessary for this operation. It is then enough to pour the concrete on the platform of formwork so as to realize the slab and / or the balcony. Before pouring, it will be possible beforehand to carry out peripheral finishing operations of the formwork platform, such as reinforcement and installation of accessories for the slab or balcony.
  • the workers leave in place the struts 1 for a static loading support, the motorization means M1, M2 being recovered or not for use on other struts or they disassemble said struts and replace them with other conventional shoring means.
  • the struts 1 can be folded so that the formwork platform can be dismantled at a height less than 1.8 m from the ground.
  • the worker will be able to lower the platform in one or more steps to the initial folded installation position, ergonomically height for a man, in order to dismount said platform safely and comfort.
  • An intermediate step of stopping the descent makes it possible to be able to take off, by manual intervention, the plywoods 32 of the formwork skin that would have remained stuck to the concrete and make them fall in contact with the secondary beams 31 or the formwork panels.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
EP11008859A 2010-11-08 2011-11-08 Vorrichtung zum Verschieben einer Verschalungsplattform für eine Bodenplatte und/oder einen Balkon Withdrawn EP2450501A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1059187A FR2967181B1 (fr) 2010-11-08 2010-11-08 Dispositif pour deplacer une plateforme de coffrage de dalle et/ou de balcon.

Publications (1)

Publication Number Publication Date
EP2450501A1 true EP2450501A1 (de) 2012-05-09

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Cited By (6)

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CN109779294A (zh) * 2019-03-14 2019-05-21 周志明 一种新式的土木工程用多功能支撑桩装置
RU2758726C1 (ru) * 2020-07-29 2021-11-01 Евгений Дмитриевич Малафеев Способ подъема домкратами с использованием телескопических опор со штоками
CN114059762A (zh) * 2021-12-03 2022-02-18 湖南中模云建筑科技有限公司 一种免拆盘扣脚的手架台模及施工方法
CN114412170A (zh) * 2022-01-24 2022-04-29 中国建筑第八工程局有限公司 便捷式建筑施工用工程钢结构支架
CN114908966A (zh) * 2022-05-11 2022-08-16 山东国建工程集团有限公司 混凝土快速支模装置
CN115626590A (zh) * 2022-10-25 2023-01-20 国网安徽省电力有限公司望江县供电公司 一种基于砼杆为载体的带电作业平台

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Publication number Priority date Publication date Assignee Title
FR3014466B1 (fr) * 2013-12-11 2015-12-04 Sateco Sa Etai de soutenement, en particulier, pour le coffrage

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CN109779294B (zh) * 2019-03-14 2020-10-27 陕西天工建设有限公司 一种土木工程用多功能支撑桩装置
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CN114412170A (zh) * 2022-01-24 2022-04-29 中国建筑第八工程局有限公司 便捷式建筑施工用工程钢结构支架
CN114908966A (zh) * 2022-05-11 2022-08-16 山东国建工程集团有限公司 混凝土快速支模装置
CN115626590A (zh) * 2022-10-25 2023-01-20 国网安徽省电力有限公司望江县供电公司 一种基于砼杆为载体的带电作业平台
CN115626590B (zh) * 2022-10-25 2023-09-12 国网安徽省电力有限公司望江县供电公司 一种基于砼杆为载体的带电作业平台

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