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EP2982813B1 - Primary support beam with adjustable length - Google Patents

Primary support beam with adjustable length Download PDF

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Publication number
EP2982813B1
EP2982813B1 EP15179740.4A EP15179740A EP2982813B1 EP 2982813 B1 EP2982813 B1 EP 2982813B1 EP 15179740 A EP15179740 A EP 15179740A EP 2982813 B1 EP2982813 B1 EP 2982813B1
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EP
European Patent Office
Prior art keywords
lateral
support beam
segment
section
segments
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.)
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EP15179740.4A
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German (de)
French (fr)
Other versions
EP2982813A1 (en
EP2982813B8 (en
Inventor
Pascal Perrotin
Sébastien Philippe
Alexandre Souvignet
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.)
Universite Savoie Mont Blanc
Alphi SAS
Original Assignee
Universite Savoie Mont Blanc
Alphi SAS
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Application filed by Universite Savoie Mont Blanc, Alphi SAS filed Critical Universite Savoie Mont Blanc
Publication of EP2982813A1 publication Critical patent/EP2982813A1/en
Publication of EP2982813B1 publication Critical patent/EP2982813B1/en
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Publication of EP2982813B8 publication Critical patent/EP2982813B8/en
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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
    • E04G11/50—Girders, beams, or the like as supporting members for forms
    • E04G11/54—Girders, beams, or the like as supporting members for forms of extensible type, with or without adjustable supporting shoes, fishplates, or the like
    • E04G11/56—Girders, beams, or the like as supporting members for forms of extensible type, with or without adjustable supporting shoes, fishplates, or the like of telescopic type

Definitions

  • the present invention relates to a primary support beam for slab formwork or the like, and more particularly relates to a primary support beam with adjustable length.
  • the document US 2,167,413A describes a temporary support beam in the field of construction, the length of which can be adjusted.
  • the primary purpose of this document is however to allow a withdrawal of the beam perpendicular to the supported surface once there is no longer need for support.
  • the beam has two sections that are not permanently maintained colinear and sliding between them. Furthermore, when the two sections are kept collinear with each other, this maintenance is performed by locking means which then oppose sliding of the sections relative to each other.
  • the document CN 202 441 051 U describes a support beam constituted by two sections arranged to slide between them. This sliding is allowed by a complementarity of the cross sections of the sections. These sections are, however, devoid of means for satisfactory attachment of other beams called "secondary". Moreover, the attachment of secondary beams is neither described nor suggested. On the contrary, the realization of a platform or slab formwork structure is made by intercrossing beams.
  • a primary support beam for the construction of slabs by formwork.
  • This primary beam has an adjustable length through two elements slidably mounted one in the other. To do this, one of the elements has a cross section much lower than the other elements, so as to be received and contained in the latter.
  • the primary beam of the document US 2006/0042179 A1 has no means for attaching secondary beams over its entire length, especially when it is deployed at maximum length. This beam is therefore difficult to use as primary support beam for slab formwork or the like.
  • the formwork of a slab or the like indeed requires the joining to each other of a plurality of primary beams and a plurality of secondary beams serving as spacers between said primary beams.
  • the document EP 2 754 778 A1 discloses a primary support beam according to the preamble of claim 1.
  • the beam of the document EP 2 754 778 A1 has the disadvantage of being devoid of means allowing the attachment of secondary beams over its entire length, especially when it is deployed at maximum length.
  • a problem proposed by the invention is to provide a primary support beam for slab formwork or the like, having an adjustable length in order to reduce the number of primary beam references to be held in stock by the slab formwork material supplier. similar.
  • the invention aims to provide a primary beam whose adjustability in length does not interfere with a satisfactory attachment of secondary beams for the formation of a support structure for slab formwork or the like.
  • the invention provides a primary support beam according to claim 1.
  • Such a primary support beam is adjustable in length to comply with the different dimensions of slabs to form.
  • the respective lateral chutes of reception of the first section and second section allow a satisfactory attachment of secondary beams along the first and second sections by a vertical support and an opposition to any axial displacement away from the first longitudinal direction.
  • the respective lateral chutes receiving the first section and second section having a permanent overlap there are continuous lateral chutes on each side of the primary support beam: it is thus possible to hang secondary beams along the entire length support primary beam, without interruption.
  • stop means can limit the sliding of the first and second sections away from each other, to define a maximum extension position.
  • the longitudinal rib and the longitudinal groove may be shaped so that the longitudinal groove receives the longitudinal rib retentive to oppose any extraction of the longitudinal rib out of the longitudinal groove during an extraction movement exerted in a direction transverse to the first longitudinal direction.
  • the slide means of simple and robust constitution, thus also participate in mutual retention between the first and second sections to limit the risk of accidental dismantling of the primary support beam.
  • the slide means are enclosed between the two U inverted and thus protected against shocks and liquid flows (such as concrete milt) that could distort or seize the slide means.
  • the locking means make it possible to fix temporarily but reliably the total length of the primary support beam, for good stability and good rigidity of the slab formwork structure or the like.
  • the primary support beam thus consists of only two sections arranged to slide. Its length adjustment is thus faster and easier than a primary support beam consisting of three or more sections.
  • the primary support beam thus has a continuous upper bearing surface when the first and second sections are in the folded position.
  • the lateral receiving chutes are slidably arranged one inside the other.
  • the upper bearing surface support secondary beams generally receives plywood support plates on which is poured the concrete slab. When a plate is supported by non-coplanar beams, it deforms and the slab thus produced follows the deformed surface of the plate and therefore lacks flatness. It is therefore important that the plywood plates are supported by beams whose upper faces are at the same height, to achieve a rigorously flat bottom face concrete slab.
  • the support primary beam 1 for slab formwork or the like, extending in a first longitudinal direction II.
  • the support primary beam 1 comprises a first section 2 and a second section 3 respectively extending in a second longitudinal direction II-II and in a third longitudinal direction III-III.
  • the first and second sections 2 and 3 are arranged to slide relative to each other in the first longitudinal direction II by means of slide 4.
  • the longitudinal directions II, II-II and III-III are here parallel.
  • the first section 2 and second section 3 are thus movable between a folding position ( figure 1 ), in which the overlap of one section by the other is the largest, and at least one extension position ( figure 2 ), in which the overlap of a section 2 or 3 by the other is less than in the folded position.
  • each side on the first and second sections 2 and 3 there is provided respective lateral receiving chutes 2a and 2b, 3a and 3b secondary support beam.
  • the receiving side chute 3a slides inside the receiving side chute 2a, while the receiving side chute 3b slides inside the receiving side chute 2b.
  • the respective lateral receiving troughs 3a and 3b of the second section 3 have a permanent overlap with respect to the respective lateral receiving troughs 2a and 2b of the first section 2 in the first longitudinal direction II.
  • the lateral receiving troughs 2a and 3a thus form a substantially continuous lateral trough 1a on a first side of the primary support truss 1, while the lateral receiving chutes 2b and 3b form a substantially continuous receiving trough 1b on a second side of the primary support beam 1.
  • the respective lateral receiving troughs 2a, 2b, 3a and 3b of the first and second sections 2 and 3 each comprise a lateral flange 20a, 20b, 30a and 30b adapted to receive in vertical support a connecting structure 5 of a secondary truss support 6 ( Figures 6 to 8 ).
  • the lateral wings 20a and 20b on the one hand, and the wings 30a and 30b on the other hand, extend apart from each other and away from the first longitudinal direction II.
  • each lateral wing 20a, 20b, 30a and 30b extends a respective lateral edge 23a, 23b, 33a and 33b opposing any axial displacement (according to movements illustrated by the arrows M1 and M2 on the figure 5 ) away from the first longitudinal direction II of the connection structure 5 of the secondary support beam 6 ( Figures 6 to 8 ).
  • the Lateral edges 23a, 23b, 33a and 33b extend towards the bearing surface 100 of the primary support beam 1 for supporting a load.
  • the lateral wing 20a is distant from the lateral wing 30a by a distance d ( figure 5 ) between about 4 mm and about 10 mm.
  • the lateral wing 20b is distant from the lateral wing 30b by a distance d of between about 4 mm and about 10 mm.
  • Stop means 7, more particularly visible on the figures 2 and 4 limit the sliding of the first and second sections 2 and 3 away from each other in the first longitudinal direction II.
  • the stop means 7 define the maximum extension position of the primary supporting beam 1.
  • the abutment means 7 also prevent any accidental separation of the first and second sections 2 and 3 of the primary supporting beam 1.
  • the abutment means 7 comprise a threaded rod 8 fixed in the first longitudinal direction II relative to the first section 2.
  • the threaded rod 8 is provided with a hexagonal head 9 at one end, and a handle 10 at its end. other end. Between these two ends, the threaded rod 8 passes through the second section 3 through an oblong hole 11 and passes through two circular orifices 12a and 12b provided in the first section 2.
  • the threaded rod 8 is engaged in a threaded nut 13 which is fixed with respect to the first section 2. The maximum extension position is reached when the end 11a of the oblong hole 11 comes into contact with the threaded rod 8.
  • the threaded rod 8 provided with its hexagonal head 9 and its handle 10, defines, by cooperation with the threaded nut 13, locking means 14 making it possible to immobilize the first and second sections 2 and 3. one relative to the other in the first longitudinal direction II.
  • the handle 10 is rotated around the fourth axial direction IV-IV so as to move the threaded rod 8 (by cooperation with the threaded nut 13 according to the movement illustrated by the arrow 15).
  • the hexagonal head 9 and the threaded nut 13 then come to clamp the first and second sections 2 and 3 against each other to immobilize them relative to each other.
  • the handle 10 is rotated around the fourth axial direction IV-IV so as to cause a movement of the threaded rod 8 reverse to that illustrated by the arrow 15.
  • the hexagonal head 9 then departs the second section 3 which, no longer pressed against the first section 2, can slide in the first longitudinal direction II.
  • the longitudinal ribs 16a and 16b and the longitudinal grooves 17a and 17b are shaped so that the longitudinal grooves 17a and 17b respectively receive the longitudinal ribs 16a and 16b retentively.
  • This retention opposes any extraction of the longitudinal ribs 16a and 16b from the longitudinal grooves 17a and 17b during an extraction movement exerted in a transverse direction relative to the first longitudinal direction I-I.
  • longitudinal ribs 16a and 16b having cross sections with outer contour extending angularly over more than 180 °.
  • the longitudinal grooves 17a and 17b have cross sections shaped to receive the longitudinal ribs 16a and 16b in an inner contour according to an overlap R extending angularly at an angle A of more than 180 °.
  • the primary support beam 1 illustrated on the figure 5 comprises first and second sections 2 and 3 respectively comprising a first profile 200 and a second profile 300 partially nested one inside the other sliding in the first longitudinal direction II.
  • first and second profiles 200 and 300 each have a free end 18 and / or 19 having a hooking nose 20 intended to cooperate with a support stay (in this case, intended to bear vertically on an end plate of a support stay in a manner comparable to that illustrated on the figure 4 of the document EP 1 234 929 A1 ).
  • the first section 2 comprises a substantially inverted U-shaped portion U2 with two branches U20 and U21 connected by a base U22.
  • the second section 3 comprises a portion U3 substantially inverted U-shaped cross section, with two branches U30 and U31 connected by a base U32.
  • the slide means 4 here constituted by the longitudinal ribs 16a and 16b and the longitudinal grooves 17a and 17b, are arranged between the two portions U2 and U3 with a substantially inverted U-shaped cross-section at the U22 and U32 bases of the U-shaped members. reversed.
  • the slide means 4 are thus well protected against external elements (shocks, debris, liquids, ...) that can lead to deformation or seizure.
  • a protection profile 21 is provided ( figure 3 ) extending from a joining profile 22 and inside the second profile 300.
  • the joining profile 22 is disposed at the free end 18 of the first section 2 and carries the attachment nose 20.
  • the joining profile 22 has a cross section identical to the cross section of the second profile 300, and is arranged to continuously extend the second profile 300 when the first and second sections 2 and 3 are in the folded position (see figure 1 ).
  • each lateral receiving chute 2a and 2b of the first section 2 comprises a lateral covering wing 24a and 24b transversely covering at least partially the lateral edges 33a and 33b of the lateral receiving chutes 3a and 3b of the second section 3.
  • connection structure 5 when the connecting structure 5 is located simultaneously in correspondence of the lateral receiving trough 2a of the first section 2 and of the lateral receiving trough 3a of the second section 3, the connection structure 5 simultaneously bears in vertical abutment on the side wing 30a receiving lateral chute 3a of the second section 3 and on the lateral covering wing 24a of the lateral receiving chute 2a of the first section 2.
  • the connecting structure 5 when the connecting structure 5 is located simultaneously in correspondence of a lateral receiving trough 2a of the first section 2 and of a lateral receiving trough 3a of the second section 3, it simultaneously bears vertically on the lateral trunking of receiving 2a of the first section, and on the lateral receiving trough 3a of the second section 3. Naturally, it is the same with the lateral receiving troughs 2b and 3b with the lateral wing 30b and the lateral covering wing 24b when a secondary supporting beam 6 bears symmetrically on the other side of the primary supporting beam 1.
  • connection structure 5 of the secondary support beam 6 is located in correspondence simultaneously of the lateral chutes 2a and 3a or 2b and 3b ( figure 6 ), or in correspondence only of the lateral receiving trough 2a or 2b ( figure 7 ), or in correspondence only with the lateral receiving trough 3a or 3b ( figure 8 ), it is certain that all bearing surfaces 60 of adjacent secondary supporting beams 6 are located at one and the same height.
  • the first and second sections 2 and 3 are arranged in the folded position ( figure 1 ) to minimize the bulk of the primary support beam 1.
  • the locking means 14 immobilize the first and second sections relative to each other in the first longitudinal direction II.
  • the primary support beam 1 When an operator uses the primary support beam 1 for the construction of a slab formwork support structure or the like, the latter may need to increase the length of the support primary beam 1.
  • the operator actuates then the handles 10 so as to release the locking means 14 and allow sliding of the first and second sections 2 and 3 relative to each other in the first longitudinal direction II.
  • the operator slides the first and second sections 2 and 3 relative to each other to an extended position to give a satisfactory length to the primary support beam 1. Once this length satisfactory reached , the operator actuates the handles 10 of the locking means 14 to immobilize the first and second sections 2 and 3 relative to each other in the first longitudinal direction II.
  • the slide means 4 remain well protected from shocks and foreign bodies (solid or liquid debris) being at least partially contained between the two portions U2 and U3 substantially inverted U-shaped. And the portions of the longitudinal ribs 16a and 16b extracted during the sliding movement out of the longitudinal grooves 17a and 17b ( figure 2 ) are still well protected thanks to the protection profile 21.
  • the primary support beam 1 is then placed in abutment on the upper plates of two support struts.
  • Secondary support beams 6 are then placed in abutment on the sides and along the primary supporting beam 1. To do this, the ends of the secondary support beams 6 come to rest on the lateral chutes 1a and 1b of the primary support beam 1.
  • connection structure 5 of some secondary support beams 6 comes into vertical support simultaneously on the lateral receiving chutes. 2a and 3a or 2b and 3b ( figure 6 ), or only comes to rest on the lateral receiving trough 2a or 2b ( figure 7 ), or only comes in vertical support on the lateral receiving trough 3a or 3b ( figure 8 ).

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
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Description

La présente invention concerne une poutrelle primaire de soutien pour coffrage de dalle ou analogue, et concerne plus particulièrement une poutrelle primaire de soutien à longueur ajustable.The present invention relates to a primary support beam for slab formwork or the like, and more particularly relates to a primary support beam with adjustable length.

Du document EP 1 234 929 A1 , on connaît une poutrelle primaire de soutien pour la construction de dalles par coffrage. Cette poutrelle primaire présente une longueur non ajustable. Pour s'adapter aux différentes dimensions de dalles à coffrer, le fournisseur de matériel de coffrage de dalle ou analogue doit ainsi tenir en stock un grand nombre de références de poutrelles primaires, présentant toutes des longueurs différentes.Of the document EP 1 234 929 A1 a primary support beam is known for the construction of slabs by formwork. This primary beam has a non-adjustable length. To adapt to the different sizes of slabs to form, the supplier of slab formwork equipment or the like must keep in stock a large number of primary beam references, all having different lengths.

Le document US 2,167,413 A décrit une poutrelle de soutien temporaire dans le domaine de la construction, dont la longueur peut être ajustée. Le but premier de ce document est toutefois de permettre un retrait de la poutrelle perpendiculairement par rapport à la surface supportée une fois qu'il n'y a plus besoin de soutien. Pour ce faire, la poutrelle comporte deux tronçons qui ne sont pas en permanence maintenus colinéaires et à coulissement entre eux. Par ailleurs, lorsque les deux tronçons sont maintenus colinéaires entre eux, ce maintien est effectué par des moyens de verrouillage qui s'opposent alors à un coulissement des tronçons l'un par rapport à l'autre.The document US 2,167,413A describes a temporary support beam in the field of construction, the length of which can be adjusted. The primary purpose of this document is however to allow a withdrawal of the beam perpendicular to the supported surface once there is no longer need for support. To do this, the beam has two sections that are not permanently maintained colinear and sliding between them. Furthermore, when the two sections are kept collinear with each other, this maintenance is performed by locking means which then oppose sliding of the sections relative to each other.

Le document US 3,108,663 A décrit une poutrelle de soutien constituée d'un premier tronçon et d'un deuxième tronçon capables de coulisser l'un par rapport à l'autre. Ces tronçons sont toutefois dépourvus de moyens permettant un accrochage satisfaisant d'autres poutrelles dites « secondaires ». D'ailleurs, l'accrochage de poutrelles secondaires n'est ni décrit ni suggéré.The document US 3,108,663 A discloses a support beam consisting of a first section and a second section capable of sliding relative to each other. These sections are, however, devoid of means for satisfactory attachment of other beams called "secondary". Moreover, the attachment of secondary beams is neither described nor suggested.

Le document CN 202 441 051 U décrit une poutrelle de soutien constituée par deux tronçons disposés à coulissement entre eux. Ce coulissement est permis par une complémentarité des sections transversales des tronçons. Ces tronçons sont toutefois dépourvus de moyens permettant un accrochage satisfaisant d'autres poutrelles dites « secondaires ». D'ailleurs, l'accrochage de poutrelles secondaires n'est ni décrit ni suggéré. Au contraire, la réalisation d'une plateforme ou structure de coffrage de dalle se fait par entrecroisement de poutrelles.The document CN 202 441 051 U describes a support beam constituted by two sections arranged to slide between them. This sliding is allowed by a complementarity of the cross sections of the sections. These sections are, however, devoid of means for satisfactory attachment of other beams called "secondary". Moreover, the attachment of secondary beams is neither described nor suggested. On the contrary, the realization of a platform or slab formwork structure is made by intercrossing beams.

Du document US 2006/0042179 A1 , on connaît une poutrelle primaire de soutien pour la construction de dalles par coffrage. Cette poutrelle primaire présente une longueur ajustable grâce à deux éléments montés à coulissement l'un dans l'autre. Pour ce faire, l'un des éléments présente une section transversale très inférieure à l'autre des éléments, de façon à pouvoir être reçu et contenu dans ce dernier.Of the document US 2006/0042179 A1 a primary support beam is known for the construction of slabs by formwork. This primary beam has an adjustable length through two elements slidably mounted one in the other. To do this, one of the elements has a cross section much lower than the other elements, so as to be received and contained in the latter.

La poutrelle primaire du document US 2006/0042179 A1 est toutefois dépourvue de moyens permettant l'accrochage de poutrelles secondaires sur la totalité de sa longueur, notamment lorsqu'elle est déployée à longueur maximale. Cette poutrelle est donc difficilement utilisable en tant que poutrelle primaire de soutien pour coffrage de dalle ou analogue. Le coffrage d'une dalle ou analogue requiert en effet la solidarisation les unes aux autres d'une pluralité de poutrelles primaires et d'une pluralité de poutrelles secondaires servant d'entretoises entre lesdites poutrelles primaires.The primary beam of the document US 2006/0042179 A1 However, it has no means for attaching secondary beams over its entire length, especially when it is deployed at maximum length. This beam is therefore difficult to use as primary support beam for slab formwork or the like. The formwork of a slab or the like indeed requires the joining to each other of a plurality of primary beams and a plurality of secondary beams serving as spacers between said primary beams.

Le document EP 2 754 778 A1 décrit une poutrelle primaire de soutien conforme au préambule de la revendication 1. Comme la poutrelle du document US 2006/0042179 A1 , la poutrelle du document EP 2 754 778 A1 présente l'inconvénient d'être dépourvue de moyens permettant l'accrochage de poutrelles secondaires sur la totalité de sa longueur, notamment lorsqu'elle est déployée à longueur maximale.The document EP 2 754 778 A1 discloses a primary support beam according to the preamble of claim 1. As the beam of the document US 2006/0042179 A1 , the beam of the document EP 2 754 778 A1 has the disadvantage of being devoid of means allowing the attachment of secondary beams over its entire length, especially when it is deployed at maximum length.

Un problème proposé par l'invention est de fournir une poutrelle primaire de soutien pour coffrage de dalle ou analogue, comportant une longueur ajustable afin de diminuer le nombre des références de poutrelles primaires que doit tenir en stock le fournisseur de matériel de coffrage de dalle ou analogue.A problem proposed by the invention is to provide a primary support beam for slab formwork or the like, having an adjustable length in order to reduce the number of primary beam references to be held in stock by the slab formwork material supplier. similar.

Simultanément, l'invention vise à fournir une poutrelle primaire dont l'ajustabilité en longueur ne nuit pas à un accrochage satisfaisant de poutrelles secondaires pour la formation d'une structure de soutien pour coffrage de dalle ou analogue.Simultaneously, the invention aims to provide a primary beam whose adjustability in length does not interfere with a satisfactory attachment of secondary beams for the formation of a support structure for slab formwork or the like.

Pour atteindre ces objets ainsi que d'autres, l'invention propose une poutrelle primaire de soutien selon la revendication 1.To achieve these and other objects, the invention provides a primary support beam according to claim 1.

Une telle poutrelle primaire de soutien est ajustable en longueur pour se conformer aux différentes dimensions de dalles à coffrer. Les goulottes latérales respectives de réception des premier tronçon et deuxième tronçon permettent un accrochage satisfaisant de poutrelles secondaires le long des premier et deuxième tronçons par un appui vertical et une opposition à tout déplacement axial à l'écart de la première direction longitudinale. Et les goulottes latérales respectives de réception des premier tronçon et deuxième tronçon présentant un recouvrement permanent, on dispose de goulottes latérales continues de chaque côté de la poutrelle primaire de soutien : il est ainsi possible d'accrocher des poutrelles secondaires selon la totalité de la longueur de la poutrelle primaire de soutien, sans interruption.Such a primary support beam is adjustable in length to comply with the different dimensions of slabs to form. The respective lateral chutes of reception of the first section and second section allow a satisfactory attachment of secondary beams along the first and second sections by a vertical support and an opposition to any axial displacement away from the first longitudinal direction. And the respective lateral chutes receiving the first section and second section having a permanent overlap, there are continuous lateral chutes on each side of the primary support beam: it is thus possible to hang secondary beams along the entire length support primary beam, without interruption.

Avantageusement, on peut prévoir que :

  • les ailes latérales des goulottes latérales de réception du premier tronçon sont distantes des ailes latérales respectives des goulottes latérales de réception du deuxième tronçon selon une distance comprise entre environ 4 mm et environ 10 mm.
Advantageously, it can be provided that:
  • the lateral flanges of the lateral receiving ducts of the first section are spaced from the respective lateral flanges of the lateral receiving ducts of the second section at a distance of between approximately 4 mm and approximately 10 mm.

Un tel écart entre les ailes latérales permet d'évacuer de façon fiable la laitance de béton qui viendrait à couler dans les goulottes latérales de réception des premier et deuxième tronçons. Par une évacuation efficace, on limite les risques que cette laitance vienne gêner le coulissement ultérieur entre les premier et deuxième tronçons.Such a gap between the lateral wings makes it possible to reliably evacuate the concrete laitance that would flow into the lateral receiving chutes of the first and second sections. Effective evacuation, it limits the risks that this milt comes to hinder the subsequent sliding between the first and second sections.

De préférence, des moyens de butée peuvent limiter le coulissement des premier et deuxième tronçons à l'écart l'un de l'autre, pour définir une position d'extension maximale.Preferably, stop means can limit the sliding of the first and second sections away from each other, to define a maximum extension position.

On empêche ainsi tout déboîtement accidentel des premier et deuxième tronçons lors de l'extension de la poutrelle primaire en longueur.This prevents any accidental dislocation of the first and second sections during the extension of the primary beam length.

Avantageusement, les moyens de glissière peuvent comporter :

  • sur l'un des premier ou deuxième tronçons, au moins une nervure longitudinale,
  • sur l'autre des premier ou deuxième tronçons, au moins une gorge longitudinale conformée pour recevoir ladite au moins une nervure longitudinale à coulissement selon la première direction longitudinale.
Advantageously, the slide means may comprise:
  • on one of the first or second sections, at least one longitudinal rib,
  • on the other of the first or second sections, at least one longitudinal groove shaped to receive said at least one longitudinal rib sliding in the first longitudinal direction.

On dispose ainsi de moyens de glissière simples et robustes, avec seulement deux éléments constitutifs. Ces éléments constitutifs, à savoir la nervure et la gorge longitudinales, peuvent être réalisés de façon simple et peu onéreuse en étant prévus dans la forme de section transversale de profilés constituant les premier et deuxième tronçons.This provides simple and robust sliding means, with only two components. These constituent elements, namely the rib and the longitudinal groove, can be made simply and inexpensively by being provided in the cross sectional shape of the profiles constituting the first and second sections.

De préférence, la nervure longitudinale et la gorge longitudinale peuvent être conformées de sorte que la gorge longitudinale reçoive la nervure longitudinale de façon rétentive pour s'opposer à toute extraction de la nervure longitudinale hors de la gorge longitudinale lors d'un mouvement d'extraction exercé selon une direction transversale à la première direction longitudinale.Preferably, the longitudinal rib and the longitudinal groove may be shaped so that the longitudinal groove receives the longitudinal rib retentive to oppose any extraction of the longitudinal rib out of the longitudinal groove during an extraction movement exerted in a direction transverse to the first longitudinal direction.

Les moyens de glissière, de constitution simple et robuste, participent ainsi également à une rétention réciproque entre les premier et deuxième tronçons pour limiter les risques de démontage accidentel de la poutrelle primaire de soutien.The slide means, of simple and robust constitution, thus also participate in mutual retention between the first and second sections to limit the risk of accidental dismantling of the primary support beam.

Pour une rétention réciproque entre les premier et deuxième tronçons, on peut avantageusement prévoir que :

  • la nervure longitudinale comporte une section transversale à contour extérieur s'étendant angulairement selon plus de 180°,
  • la gorge longitudinale comporte une section transversale conformée pour recevoir la nervure longitudinale dans un contour intérieur selon un recouvrement s'étendant angulairement selon plus de 180°.
For reciprocal retention between the first and second sections, it can advantageously be provided that:
  • the longitudinal rib has a transverse section with an outer contour extending angularly over more than 180 °,
  • the longitudinal groove has a cross section shaped to receive the longitudinal rib in an inner contour in a cover extending angularly over more than 180 °.

De préférence, on peut prévoir que :

  • les premier et deuxième tronçons ont chacun une portion à section transversale sensiblement en forme de U inversé, avec deux branches reliées par une base, lesdites portions étant disposées à recouvrement l'une de l'autre,
  • les moyens de glissière sont disposés entre les deux portions à section transversale sensiblement en forme de U inversé, au niveau de la base du U.
Preferably, it can be provided that:
  • the first and second sections each have a cross-sectional portion substantially in the shape of an inverted U, with two branches connected by a base, said portions being arranged overlapping one another,
  • the slider means are disposed between the two substantially inverted U-shaped cross-sectional portions at the base of the U.

Les moyens de glissière se trouvent enfermés entre les deux U inversés et donc protégés contre les chocs et les écoulements de liquides (tels que de la laitance de béton) qui pourraient fausser ou gripper les moyens de glissière.The slide means are enclosed between the two U inverted and thus protected against shocks and liquid flows (such as concrete milt) that could distort or seize the slide means.

Avantageusement, on peut prévoir des moyens de verrouillage permettant d'immobiliser les premier et deuxième tronçons l'un par rapport à l'autre selon la première direction longitudinale.Advantageously, one can provide locking means for immobilizing the first and second sections relative to each other in the first longitudinal direction.

Les moyens de verrouillage permettent de fixer temporairement mais de façon fiable la longueur totale de la poutrelle primaire de soutien, pour une bonne stabilité et une bonne rigidité de la structure de coffrage de dalle ou analogue.The locking means make it possible to fix temporarily but reliably the total length of the primary support beam, for good stability and good rigidity of the slab formwork structure or the like.

De préférence, on peut prévoir que :

  • les premier et deuxième tronçons comportent respectivement un premier profilé et un deuxième profilé emboîtés partiellement l'un dans l'autre à coulissement selon la première direction longitudinale,
  • les premier et deuxième profilés ont chacun une extrémité libre comportant un nez d'accrochage destiné à coopérer avec un étai de soutien.
Preferably, it can be provided that:
  • the first and second sections comprise respectively a first profile and a second section partially fitted one into the other sliding in the first longitudinal direction,
  • the first and second profiles each have a free end having a hooking nose for cooperating with a support strut.

La poutrelle primaire de soutien est ainsi constituée de seulement deux tronçons disposés à coulissement. Son réglage en longueur est ainsi plus rapide et plus facile qu'une poutrelle primaire de soutien constituée en trois tronçons ou plus.The primary support beam thus consists of only two sections arranged to slide. Its length adjustment is thus faster and easier than a primary support beam consisting of three or more sections.

Avantageusement, on peut prévoir que :

  • le premier tronçon comporte à son extrémité libre un profilé de jonction portant le nez d'accrochage,
  • le profilé de jonction comporte une section transversale identique à la section transversale du deuxième profilé, et est disposé de façon à prolonger de façon continue le deuxième profilé lorsque les premier et deuxième tronçons sont en position de repli,
  • un profilé de protection s'étend depuis le profilé de jonction et à l'intérieur du deuxième profilé.
Advantageously, it can be provided that:
  • the first section comprises at its free end a junction profile carrying the hooking nose,
  • the joining profile has a cross section identical to the cross section of the second section, and is arranged to extend continue the second section when the first and second sections are in the retracted position,
  • a protection profile extends from the joining profile and inside the second profile.

La poutrelle primaire de soutien présente ainsi une surface supérieure de portage continue lorsque les premier et deuxième tronçons sont en position de repli.The primary support beam thus has a continuous upper bearing surface when the first and second sections are in the folded position.

Dans la poutrelle primaire de soutien selon l'invention, les goulottes latérales de réception sont agencées à coulissement l'une dans l'autre. Cela pose un problème supplémentaire qui est de garantir que toutes les poutrelles secondaires de soutien, venant en appui vertical dans les goulottes latérales de réception du premier tronçon et/ou du deuxième tronçon, aient chacune leur surface supérieure portante (destinée à soutenir une charge) située à une même hauteur pour définir un plan de soutien. En effet, la surface supérieure portante des poutrelles secondaires de soutien reçoit généralement en appui des plaques en bois contreplaqué sur lesquelles est coulée la dalle en béton. Lorsqu'une plaque est soutenue par des poutrelles non coplanaires, elle se déforme et la dalle ainsi réalisée suit la surface déformée de la plaque et manque donc de planéité. Il importe donc que les plaques en bois contreplaqué soient soutenues par des poutrelles dont les faces supérieures sont à une même hauteur, pour réaliser une dalle en béton à face inférieure rigoureusement plane.In the primary support beam according to the invention, the lateral receiving chutes are slidably arranged one inside the other. This poses an additional problem which is to ensure that all the secondary support beams, coming in vertical support in the receiving side chutes of the first section and / or the second section, each have their upper bearing surface (intended to support a load). located at the same height to define a support plan. Indeed, the upper bearing surface support secondary beams generally receives plywood support plates on which is poured the concrete slab. When a plate is supported by non-coplanar beams, it deforms and the slab thus produced follows the deformed surface of the plate and therefore lacks flatness. It is therefore important that the plywood plates are supported by beams whose upper faces are at the same height, to achieve a rigorously flat bottom face concrete slab.

Pour résoudre ce problème spécifique supplémentaire, l'invention propose une structure de soutien pour coffrage de dalle ou analogue, comportant :

  • au moins une poutrelle primaire de soutien telle que décrite précédemment,
  • au moins une poutrelle secondaire de soutien ayant une structure de raccordement destinée à être reçue en appui vertical dans les goulottes latérales de réception du premier tronçon ou du deuxième tronçon, et ayant une surface supérieure portante destinée à soutenir une charge,
dans laquelle la structure de raccordement et les goulottes latérales de réception des premier et deuxième tronçons sont conformées de façon que, lorsque la structure de raccordement est située simultanément en correspondance d'une goulotte latérale de réception du premier tronçon et d'une goulotte latérale de réception du deuxième tronçon, la structure de raccordement vient simultanément en appui vertical sur la goulotte latérale de réception du premier tronçon et sur la goulotte latérale de réception du deuxième tronçon.To solve this specific additional problem, the invention proposes a support structure for slab formwork or the like, comprising:
  • at least one primary support beam as described above,
  • at least one secondary support beam having a connecting structure intended to be received in vertical support in the lateral receiving troughs of the first section or the second section, and having a bearing surface designed to support a load,
in which the connecting structure and the receiving side ducts of the first and second sections are shaped so that, when the connecting structure is located simultaneously in correspondence of a receiving side chute of the first section and a side chute of reception of the second section, the connecting structure is simultaneously supported vertically on the lateral receiving chute of the first section and the lateral receiving chute of the second section.

Avantageusement, on peut prévoir que :

  • chaque goulotte latérale de réception du premier tronçon comporte une aile latérale de recouvrement venant recouvrir transversalement au moins partiellement la bordure latérale des goulottes latérales de réception du deuxième tronçon,
  • lorsque la structure de raccordement est située simultanément en correspondance d'une goulotte latérale de réception du premier tronçon et d'une goulotte latérale de réception du deuxième tronçon, la structure de raccordement vient simultanément en appui vertical sur l'aile latérale de goulotte latérale de réception du deuxième tronçon et sur l'aile latérale de recouvrement de la goulotte latérale de réception du premier tronçon.
Advantageously, it can be provided that:
  • each lateral chute for receiving the first section comprises a lateral overlapping wing coming to cover at least partially transversely the lateral edge of the side receiving troughs of the second section,
  • when the connecting structure is located simultaneously in correspondence of a lateral receiving chute of the first section and a side receiving chute of the second section, the connecting structure is simultaneously in vertical support on the lateral side chute side of the receiving the second section and the side wing cover of the side chute receiving the first section.

D'autres objets, caractéristiques et avantages de la présente invention ressortiront de la description suivante de modes de réalisation particuliers, faite en relation avec les figures jointes, parmi lesquelles :

  • la figure 1 est une vue en perspective d'un mode de réalisation particulier de poutrelle primaire de soutien selon l'invention, en position de repli ;
  • la figure 2 est une vue en perspective de la poutrelle primaire de soutien de la figure 1, en position d'extension ;
  • la figure 3 est vue en perspective de la poutrelle primaire de soutien des figures 1 et 2, en position d'extension et munie d'un profilé de protection ;
  • la figure 4 est une vue de détails et en perspective de moyens de butée ;
  • la figure 5 est une vue en coupe transversale de la poutrelle primaire de soutien des figures 1 à 3 ;
  • la figure 6 est une vue partielle d'une structure de soutien de coffrage de dalle ou analogue, comportant une poutrelle primaire de soutien des figures 1 à 5 vue de face et recevant en appui une poutrelle secondaire de soutien située simultanément en correspondance de goulottes latérales de réception d'un premier tronçon et d'un deuxième tronçon ;
  • la figure 7 est une vue de la structure de soutien de la figure 6, avec la poutrelle de soutien vue de face et recevant en appui une poutrelle secondaire de soutien située seulement en correspondance de la goulotte latérale de réception du premier tronçon ; et
  • la figure 8 est une vue de la structure de soutien de la figure 6, avec la poutrelle de soutien vue de face et recevant en appui une poutrelle secondaire de soutien située seulement en correspondance de la goulotte latérale de réception du deuxième tronçon.
Other objects, features and advantages of the present invention will become apparent from the following description of particular embodiments, with reference to the accompanying figures, in which:
  • the figure 1 is a perspective view of a particular embodiment of primary support beam according to the invention, in the folded position;
  • the figure 2 is a perspective view of the primary support beam of the figure 1 in the extended position;
  • the figure 3 is a perspective view of the primary support beam of figures 1 and 2 in the extended position and provided with a protection profile;
  • the figure 4 is a detailed and perspective view of abutment means;
  • the figure 5 is a cross-sectional view of the primary support beam of the Figures 1 to 3 ;
  • the figure 6 is a partial view of a slab formwork support structure or the like, having a primary support beam for Figures 1 to 5 front view and receiving in support a secondary support beam located simultaneously in correspondence of side chutes receiving a first section and a second section;
  • the figure 7 is a view of the support structure of the figure 6 , with the support beam viewed from the front and receiving in support a secondary support beam located only in correspondence of the lateral receiving chute of the first section; and
  • the figure 8 is a view of the support structure of the figure 6 , with the support beam viewed from the front and receiving in support a secondary support beam located only in correspondence of the lateral receiving trough of the second section.

Sur les figures 1 à 5 est illustré un mode de réalisation particulier de poutrelle primaire de soutien 1 pour coffrage de dalle ou analogue, s'étendant selon une première direction longitudinale I-I. la poutrelle primaire de soutien 1 comporte un premier tronçon 2 et un deuxième tronçon 3 s'étendant respectivement selon une deuxième direction longitudinale II-II et selon une troisième direction longitudinale III-III. Les premier et deuxième tronçons 2 et 3 sont disposés à coulissement l'un par rapport à l'autre selon la première direction longitudinale I-I par des moyens de glissière 4. Les directions longitudinales I-I, II-II et III-III sont ici parallèles. Les premier tronçon 2 et deuxième tronçon 3 sont ainsi déplaçables entre une position de repli (figure 1), dans laquelle le recouvrement d'un tronçon par l'autre est le plus grand, et au moins une position d'extension (figure 2), dans lequel le recouvrement d'un tronçon 2 ou 3 par l'autre est moindre qu'en position de repli.On the Figures 1 to 5 is illustrated a particular embodiment of primary support beam 1 for slab formwork or the like, extending in a first longitudinal direction II. the support primary beam 1 comprises a first section 2 and a second section 3 respectively extending in a second longitudinal direction II-II and in a third longitudinal direction III-III. The first and second sections 2 and 3 are arranged to slide relative to each other in the first longitudinal direction II by means of slide 4. The longitudinal directions II, II-II and III-III are here parallel. The first section 2 and second section 3 are thus movable between a folding position ( figure 1 ), in which the overlap of one section by the other is the largest, and at least one extension position ( figure 2 ), in which the overlap of a section 2 or 3 by the other is less than in the folded position.

Sur la figure 5, on voit plus particulièrement que, de chaque côté sur les premier et deuxième tronçons 2 et 3, on prévoit des goulottes latérales respectives de réception 2a et 2b, 3a et 3b de poutrelle secondaire de soutien. La goulotte latérale de réception 3a coulisse à l'intérieur de la goulotte latérale de réception 2a, tandis que la goulotte latérale de réception 3b coulisse à l'intérieur de la goulotte latérale de réception 2b. Quelles que soient les positions relatives des premier et deuxième tronçons 2 et 3 l'un par rapport à l'autre en coulissement entre la position de repli (figure 1) et la position d'extension (figure 2), les goulottes latérales respectives de réception 3a et 3b du deuxième tronçon 3 ont un recouvrement r permanent par rapport aux goulottes latérales respectives de réception 2a et 2b du premier tronçon 2 selon la première direction longitudinale I-I. Les goulottes latérales de réception 2a et 3a forment ainsi une goulotte latérale 1 a sensiblement continue sur un premier côté de la poutrelle primaire de soutien 1, tandis que les goulottes latérales de réception 2b et 3b forment une goulotte de réception 1 b sensiblement continue sur un deuxième côté de la poutrelle primaire de soutien 1.On the figure 5 it is more particularly seen that, on each side on the first and second sections 2 and 3, there is provided respective lateral receiving chutes 2a and 2b, 3a and 3b secondary support beam. The receiving side chute 3a slides inside the receiving side chute 2a, while the receiving side chute 3b slides inside the receiving side chute 2b. Whatever the relative positions of the first and second sections 2 and 3 relative to each other in sliding between the folded position ( figure 1 ) and the extension position ( figure 2 ), the respective lateral receiving troughs 3a and 3b of the second section 3 have a permanent overlap with respect to the respective lateral receiving troughs 2a and 2b of the first section 2 in the first longitudinal direction II. The lateral receiving troughs 2a and 3a thus form a substantially continuous lateral trough 1a on a first side of the primary support truss 1, while the lateral receiving chutes 2b and 3b form a substantially continuous receiving trough 1b on a second side of the primary support beam 1.

On voit plus particulièrement sur la figure 5 que les goulottes latérales respectives de réception 2a, 2b, 3a et 3b des premier et deuxième tronçons 2 et 3 comportent chacune une aile latérale 20a, 20b, 30a et 30b adaptée pour recevoir en appui vertical une structure de raccordement 5 d'une poutrelle secondaire de soutien 6 (figures 6 à 8). Les ailes latérales 20a et 20b d'une part, et les ailes 30a et 30b d'autre part, s'étendent à l'écart l'une de l'autre et à l'écart de la première direction longitudinale I-I.We see more particularly on the figure 5 that the respective lateral receiving troughs 2a, 2b, 3a and 3b of the first and second sections 2 and 3 each comprise a lateral flange 20a, 20b, 30a and 30b adapted to receive in vertical support a connecting structure 5 of a secondary truss support 6 ( Figures 6 to 8 ). The lateral wings 20a and 20b on the one hand, and the wings 30a and 30b on the other hand, extend apart from each other and away from the first longitudinal direction II.

Par ailleurs, depuis chaque aile latérale 20a, 20b, 30a et 30b s'étend une bordure latérale respective 23a, 23b, 33a et 33b s'opposant à tout déplacement axial (selon des mouvements illustrés par les flèches M1 et M2 sur la figure 5) à l'écart de la première direction longitudinale I-I de la structure de raccordement 5 de la poutrelle secondaire de soutien 6 (figures 6 à 8). Les bordures latérales 23a, 23b, 33a et 33b s'étendent en direction de la surface supérieure portante 100 de la poutrelle primaire de soutien 1 destinée à soutenir une charge.Moreover, since each lateral wing 20a, 20b, 30a and 30b extends a respective lateral edge 23a, 23b, 33a and 33b opposing any axial displacement (according to movements illustrated by the arrows M1 and M2 on the figure 5 ) away from the first longitudinal direction II of the connection structure 5 of the secondary support beam 6 ( Figures 6 to 8 ). The Lateral edges 23a, 23b, 33a and 33b extend towards the bearing surface 100 of the primary support beam 1 for supporting a load.

L'aile latérale 20a est distante de l'aile latérale 30a selon une distance d (figure 5) comprise entre environ 4 mm et environ 10 mm. De façon comparable, l'aile latérale 20b est distante de l'aile latérale 30b selon une distance d comprise entre environ 4 mm et environ 10 mm.The lateral wing 20a is distant from the lateral wing 30a by a distance d ( figure 5 ) between about 4 mm and about 10 mm. In a comparable manner, the lateral wing 20b is distant from the lateral wing 30b by a distance d of between about 4 mm and about 10 mm.

Des moyens de butée 7, plus particulièrement visibles sur les figures 2 et 4, limitent le coulissement des premier et deuxième tronçons 2 et 3 à l'écart l'un de l'autre selon la première direction longitudinale I-I. Les moyens de butée 7 définissent la position d'extension maximale de la poutrelle primaire de soutien 1. Les moyens de butée 7 empêchent également toute séparation accidentelle des premier et deuxième tronçons 2 et 3 de la poutrelle primaire de soutien 1.Stop means 7, more particularly visible on the figures 2 and 4 limit the sliding of the first and second sections 2 and 3 away from each other in the first longitudinal direction II. The stop means 7 define the maximum extension position of the primary supporting beam 1. The abutment means 7 also prevent any accidental separation of the first and second sections 2 and 3 of the primary supporting beam 1.

De façon plus précise, on voit sur les figures 4 et 5 que les moyens de butée 7 comportent une tige filetée 8 fixe selon la première direction longitudinale I-I par rapport au premier tronçon 2. La tige filetée 8 est munie d'une tête hexagonale 9 à une première extrémité, et d'une poignée 10 à son autre extrémité. Entre ces deux extrémités, la tige filetée 8 traverse le deuxième tronçon 3 à travers un trou oblong 11 et passe dans deux orifices circulaires 12a et 12b prévus dans le premier tronçon 2. La tige filetée 8 est en prise dans un écrou fileté 13 qui est fixe par rapport au premier tronçon 2. La position d'extension maximale est atteinte lorsque l'extrémité 11a du trou oblong 11 vient au contact de la tige filetée 8.More precisely, we see on the figures 4 and 5 that the abutment means 7 comprise a threaded rod 8 fixed in the first longitudinal direction II relative to the first section 2. The threaded rod 8 is provided with a hexagonal head 9 at one end, and a handle 10 at its end. other end. Between these two ends, the threaded rod 8 passes through the second section 3 through an oblong hole 11 and passes through two circular orifices 12a and 12b provided in the first section 2. The threaded rod 8 is engaged in a threaded nut 13 which is fixed with respect to the first section 2. The maximum extension position is reached when the end 11a of the oblong hole 11 comes into contact with the threaded rod 8.

On comprend que la tige filetée 8, munie de sa tête hexagonale 9 et de sa poignée 10, définit, par coopération avec l'écrou fileté 13, des moyens de verrouillage 14 permettant d'immobiliser les premiers et deuxièmes tronçons 2 et 3 l'un par rapport à l'autre selon la première direction longitudinale I-I. Pour verrouiller les premier et deuxième tronçons 2 et 3 l'un par rapport à l'autre, on tourne la poignée 10 autour de la quatrième direction axiale IV-IV de façon à déplacer la tige filetée 8 (par coopération avec l'écrou fileté 13 selon le mouvement illustré par la flèche 15). La tête hexagonale 9 et l'écrou fileté 13 viennent alors serrer les premier et deuxième tronçons 2 et 3 les uns contre les autres pour les immobiliser l'un par rapport à l'autre.It will be understood that the threaded rod 8, provided with its hexagonal head 9 and its handle 10, defines, by cooperation with the threaded nut 13, locking means 14 making it possible to immobilize the first and second sections 2 and 3. one relative to the other in the first longitudinal direction II. To lock the first and second sections 2 and 3 relative to each other, the handle 10 is rotated around the fourth axial direction IV-IV so as to move the threaded rod 8 (by cooperation with the threaded nut 13 according to the movement illustrated by the arrow 15). The hexagonal head 9 and the threaded nut 13 then come to clamp the first and second sections 2 and 3 against each other to immobilize them relative to each other.

Pour libérer les premier et deuxième tronçons 2 et 3 en coulissement selon la première direction longitudinale I-I, la poignée 10 est tournée autour de la quatrième direction axiale IV-IV de façon à provoquer un mouvement de la tige filetée 8 inverse à celui illustré par la flèche 15. La tête hexagonale 9 s'écarte alors du deuxième tronçon 3 qui, n'étant plus pressé contre le premier tronçon 2, peut coulisser selon la première direction longitudinale I-I.To release the first and second sections 2 and 3 sliding in the first longitudinal direction II, the handle 10 is rotated around the fourth axial direction IV-IV so as to cause a movement of the threaded rod 8 reverse to that illustrated by the arrow 15. The hexagonal head 9 then departs the second section 3 which, no longer pressed against the first section 2, can slide in the first longitudinal direction II.

On voit plus particulièrement sur les figures 4 et 5 que les moyens de glissière 4 comportent :

  • deux nervures longitudinales 16a et 16b sur le premier tronçon 2,
  • deux gorges longitudinales 17a et 17b sur le deuxième tronçon 3.
  • les gorges longitudinales 17a et 17b sont conformées pour recevoir les nervures longitudinales 16a et 16b à coulissement selon la première direction longitudinale I-I.
We see more particularly the figures 4 and 5 that the slide means 4 comprise:
  • two longitudinal ribs 16a and 16b on the first section 2,
  • two longitudinal grooves 17a and 17b on the second section 3.
  • the longitudinal grooves 17a and 17b are shaped to receive the longitudinal ribs 16a and 16b sliding in the first longitudinal direction II.

Sur la figure 5, on voit que les nervures longitudinales 16a et 16b et les gorges longitudinales 17a et 17b sont conformées de sorte que les gorges longitudinales 17a et 17b reçoivent respectivement les nervures longitudinales 16a et 16b de façon rétentive.On the figure 5 it can be seen that the longitudinal ribs 16a and 16b and the longitudinal grooves 17a and 17b are shaped so that the longitudinal grooves 17a and 17b respectively receive the longitudinal ribs 16a and 16b retentively.

Cette rétention s'oppose à toute extraction des nervures longitudinales 16a et 16b hors des gorges longitudinales 17a et 17b lors d'un mouvement d'extraction exercé selon une direction transversale par rapport à la première direction longitudinale I-I.This retention opposes any extraction of the longitudinal ribs 16a and 16b from the longitudinal grooves 17a and 17b during an extraction movement exerted in a transverse direction relative to the first longitudinal direction I-I.

Pour ce faire, on prévoit ici des nervures longitudinales 16a et 16b comportant des sections transversales à contour extérieur s'étendant angulairement selon plus de 180°. De leur côté, les gorges longitudinales 17a et 17b comportent des sections transversales conformées pour recevoir les nervures longitudinales 16a et 16b dans un contour intérieur selon un recouvrement R s'étendant angulairement selon un angle A de plus de 180°.To do this, provision is made here longitudinal ribs 16a and 16b having cross sections with outer contour extending angularly over more than 180 °. On their side, the longitudinal grooves 17a and 17b have cross sections shaped to receive the longitudinal ribs 16a and 16b in an inner contour according to an overlap R extending angularly at an angle A of more than 180 °.

En d'autres termes, la poutrelle primaire de soutien 1 illustrée sur la figure 5 comprend des premier et deuxième tronçons 2 et 3 comportant respectivement un premier profilé 200 et un deuxième profilé 300 emboîtés partiellement l'un dans l'autre à coulissement selon la première direction longitudinale I-I. Sur les figures 1 à 3, on voit que les premier et deuxième profilés 200 et 300 ont chacun une extrémité libre 18 et/ou 19 comportant un nez d'accrochage 20 destiné à coopérer avec un étai de soutien (en l'espèce, destiné à venir en appui vertical sur une platine d'extrémité d'un étai de soutien de façon comparable à ce qui est illustré sur la figure 4 du document EP 1 234 929 A1 ).In other words, the primary support beam 1 illustrated on the figure 5 comprises first and second sections 2 and 3 respectively comprising a first profile 200 and a second profile 300 partially nested one inside the other sliding in the first longitudinal direction II. On the Figures 1 to 3 , it can be seen that the first and second profiles 200 and 300 each have a free end 18 and / or 19 having a hooking nose 20 intended to cooperate with a support stay (in this case, intended to bear vertically on an end plate of a support stay in a manner comparable to that illustrated on the figure 4 of the document EP 1 234 929 A1 ).

Sur la figure 5, on voit que le premier tronçon 2 comporte une portion U2 à section transversale sensiblement en forme de U inversé, avec deux branches U20 et U21 reliées par une base U22. De son côté, le deuxième tronçon 3 comporte une portion U3 à section transversale sensiblement en forme de U inversé, avec deux branches U30 et U31 reliées par une base U32.On the figure 5 it can be seen that the first section 2 comprises a substantially inverted U-shaped portion U2 with two branches U20 and U21 connected by a base U22. For its part, the second section 3 comprises a portion U3 substantially inverted U-shaped cross section, with two branches U30 and U31 connected by a base U32.

Les moyens de glissière 4, ici constitués par les nervures longitudinales 16a et 16b et gorges longitudinales 17a et 17b, sont disposés entre les deux portions U2 et U3 à section transversale sensiblement en forme de U inversé, au niveau des bases U22 et U32 des U inversés. Les moyens de glissière 4 sont ainsi bien protégés contre les éléments extérieurs (chocs, débris, liquides, ...) pouvant mener à une déformation ou un grippage.The slide means 4, here constituted by the longitudinal ribs 16a and 16b and the longitudinal grooves 17a and 17b, are arranged between the two portions U2 and U3 with a substantially inverted U-shaped cross-section at the U22 and U32 bases of the U-shaped members. reversed. The slide means 4 are thus well protected against external elements (shocks, debris, liquids, ...) that can lead to deformation or seizure.

De façon à protéger en permanence les moyens de glissière 4, on prévoit un profilé de protection 21 (figure 3) s'étendant depuis un profilé de jonction 22 et à l'intérieur du deuxième profilé 300. Le profilé de jonction 22 est disposé à l'extrémité libre 18 du premier tronçon 2 et porte le nez d'accrochage 20. Le profilé de jonction 22 comporte une section transversale identique à la section transversale du deuxième profilé 300, et est disposé de façon à prolonger de façon continue le deuxième profilé 300 lorsque les premier et deuxième tronçons 2 et 3 sont en position de repli (voir figure 1).In order to permanently protect the slide means 4, a protection profile 21 is provided ( figure 3 ) extending from a joining profile 22 and inside the second profile 300. The joining profile 22 is disposed at the free end 18 of the first section 2 and carries the attachment nose 20. The joining profile 22 has a cross section identical to the cross section of the second profile 300, and is arranged to continuously extend the second profile 300 when the first and second sections 2 and 3 are in the folded position (see figure 1 ).

Sur la figure 5, on voit que chaque goulotte latérale de réception 2a et 2b du premier tronçon 2 comporte une aile latérale de recouvrement 24a et 24b venant recouvrir transversalement au moins partiellement les bordures latérales 33a et 33b des goulottes latérales de réception 3a et 3b du deuxième tronçon 3.On the figure 5 , it can be seen that each lateral receiving chute 2a and 2b of the first section 2 comprises a lateral covering wing 24a and 24b transversely covering at least partially the lateral edges 33a and 33b of the lateral receiving chutes 3a and 3b of the second section 3.

On voit plus particulièrement sur la figure 6 que, lorsque la structure de raccordement 5 est située simultanément en correspondance de la goulotte latérale de réception 2a du premier tronçon 2 et de la goulotte latérale de réception 3a du deuxième tronçon 3, la structure de raccordement 5 vient simultanément en appui vertical sur l'aile latérale 30a de goulotte latérale de réception 3a du deuxième tronçon 3 et sur l'aile latérale de recouvrement 24a de la goulotte latérale de réception 2a du premier tronçon 2.We see more particularly on the figure 6 when the connecting structure 5 is located simultaneously in correspondence of the lateral receiving trough 2a of the first section 2 and of the lateral receiving trough 3a of the second section 3, the connection structure 5 simultaneously bears in vertical abutment on the side wing 30a receiving lateral chute 3a of the second section 3 and on the lateral covering wing 24a of the lateral receiving chute 2a of the first section 2.

Ainsi, lorsque la structure de raccordement 5 est située simultanément en correspondance d'une goulotte latérale de réception 2a du premier tronçon 2 et d'une goulotte latérale de réception 3a du deuxième tronçon 3, elle vient simultanément en appui vertical sur la goulotte latérale de réception 2a du premier tronçon, et sur la goulotte latérale de réception 3a du deuxième tronçon 3. Naturellement, il en est de même avec les goulottes latérales de réception 2b et 3b avec l'aile latérale 30b et l'aile latérale de recouvrement 24b lorsqu'une poutrelle secondaire de soutien 6 vient en appui de façon symétrique de l'autre côté de la poutrelle primaire de soutien 1.Thus, when the connecting structure 5 is located simultaneously in correspondence of a lateral receiving trough 2a of the first section 2 and of a lateral receiving trough 3a of the second section 3, it simultaneously bears vertically on the lateral trunking of receiving 2a of the first section, and on the lateral receiving trough 3a of the second section 3. Naturally, it is the same with the lateral receiving troughs 2b and 3b with the lateral wing 30b and the lateral covering wing 24b when a secondary supporting beam 6 bears symmetrically on the other side of the primary supporting beam 1.

De cette façon, que la structure de raccordement 5 de la poutrelle secondaire de soutien 6 soit située en correspondance simultanément des goulottes latérales 2a et 3a ou 2b et 3b (figure 6), ou en correspondance seulement de la goulotte latérale de réception 2a ou 2b (figure 7), ou en correspondance seulement de la goulotte latérale de réception 3a ou 3b (figure 8), on est certain que toutes les surfaces supérieures portantes 60 de poutrelles secondaires de soutien 6 adjacentes sont situées à une seule et même hauteur.In this way, that the connection structure 5 of the secondary support beam 6 is located in correspondence simultaneously of the lateral chutes 2a and 3a or 2b and 3b ( figure 6 ), or in correspondence only of the lateral receiving trough 2a or 2b ( figure 7 ), or in correspondence only with the lateral receiving trough 3a or 3b ( figure 8 ), it is certain that all bearing surfaces 60 of adjacent secondary supporting beams 6 are located at one and the same height.

Sur les figures 6 à 8, on voit que la surface supérieure portante 60 de la poutrelle secondaire de soutien 6 et la surface supérieure portante 100 de la poutrelle primaire de soutien 1 sont situées à une même hauteur selon la direction verticale V-V.On the Figures 6 to 8 , it can be seen that the upper bearing surface 60 of the secondary support beam 6 and the upper bearing surface 100 of the primary support beam 1 are located at the same height in the vertical direction VV.

Ainsi, toutes les surfaces supérieures portantes 60 des poutrelles secondaires 6 adjacentes sont situées dans un même plan P horizontal que la surface supérieure portante 100 de la poutrelle primaire de soutien 1.Thus, all the upper bearing surfaces 60 of the adjacent secondary beams 6 are situated in the same horizontal plane P as the bearing surface 100 of the primary support beam 1.

Lors du stockage de la poutrelle primaire de soutien 1, les premier et deuxième tronçons 2 et 3 sont disposés en position de repli (figure 1) de façon à limiter au maximum l'encombrement de la poutrelle primaire de soutien 1. Pour interdire tout coulissement intempestif des premier et deuxième tronçons 2 et 3 depuis leur position de repli vers une position d'extension, les moyens de verrouillage 14 immobilisent les premier et deuxième tronçons l'un par rapport à l'autre selon la première direction longitudinale I-I.During the storage of the primary support beam 1, the first and second sections 2 and 3 are arranged in the folded position ( figure 1 ) to minimize the bulk of the primary support beam 1. To prevent inadvertent sliding of the first and second sections 2 and 3 from their folded position to an extended position, the locking means 14 immobilize the first and second sections relative to each other in the first longitudinal direction II.

Lorsqu'un opérateur utilise la poutrelle primaire de soutien 1 pour la construction d'une structure de soutien pour coffrage de dalle ou analogue, celui-ci peut avoir besoin d'augmenter la longueur de la poutrelle primaire de soutien 1. L'opérateur actionne alors les poignées 10 de façon à libérer les moyens de verrouillage 14 et autoriser un coulissement des premier et deuxième tronçons 2 et 3 l'un par rapport à l'autre selon la première direction longitudinale I-I. L'opérateur fait ensuite coulisser les premier et deuxième tronçons 2 et 3 l'un par rapport à l'autre vers une position d'extension jusqu'à donner une longueur satisfaisante à la poutrelle primaire de soutien 1. Une fois cette longueur satisfaisante atteinte, l'opérateur actionne les poignées 10 des moyens de verrouillage 14 pour immobiliser les premier et deuxième tronçons 2 et 3 l'un par rapport à l'autre selon la première direction longitudinale I-I. Pendant ce coulissement, les moyens de glissière 4 restent bien protégés des chocs et corps étrangers (débris solides ou liquides) en étant au moins partiellement contenus entre les deux portions U2 et U3 sensiblement en forme de U inversé. Et les portions des nervures longitudinales 16a et 16b extraites lors du mouvement de coulissement hors des gorges longitudinales 17a et 17b (figure 2) restent malgré tout bien protégées grâce au profilé de protection 21.When an operator uses the primary support beam 1 for the construction of a slab formwork support structure or the like, the latter may need to increase the length of the support primary beam 1. The operator actuates then the handles 10 so as to release the locking means 14 and allow sliding of the first and second sections 2 and 3 relative to each other in the first longitudinal direction II. The operator then slides the first and second sections 2 and 3 relative to each other to an extended position to give a satisfactory length to the primary support beam 1. Once this length satisfactory reached , the operator actuates the handles 10 of the locking means 14 to immobilize the first and second sections 2 and 3 relative to each other in the first longitudinal direction II. During this sliding, the slide means 4 remain well protected from shocks and foreign bodies (solid or liquid debris) being at least partially contained between the two portions U2 and U3 substantially inverted U-shaped. And the portions of the longitudinal ribs 16a and 16b extracted during the sliding movement out of the longitudinal grooves 17a and 17b ( figure 2 ) are still well protected thanks to the protection profile 21.

La poutrelle primaire de soutien 1 est ensuite disposée en appui sur les platines supérieures de deux étais de soutien. Des poutrelles secondaires de soutien 6 sont ensuite disposées en appui sur les côtés et le long de la poutrelle primaire de soutien 1. Pour ce faire, les extrémités des poutrelles secondaires de soutien 6 viennent reposer sur les goulottes latérales 1 a et 1 b de la poutrelle primaire de soutien 1.The primary support beam 1 is then placed in abutment on the upper plates of two support struts. Secondary support beams 6 are then placed in abutment on the sides and along the primary supporting beam 1. To do this, the ends of the secondary support beams 6 come to rest on the lateral chutes 1a and 1b of the primary support beam 1.

En fonction de la position des poutrelles secondaires de soutien 6 par rapport à la poutrelle primaire de soutien 1 selon la première direction longitudinale I-I, la structure de raccordement 5 de certaines poutrelles secondaires de soutien 6 vient en appui vertical simultanément sur les goulottes latérales de réception 2a et 3a ou 2b et 3b (figure 6), ou vient seulement en appui sur la goulotte latérale de réception 2a ou 2b (figure 7), ou vient seulement en appui vertical sur la goulotte latérale de réception 3a ou 3b (figure 8).Depending on the position of the secondary support beams 6 with respect to the primary support beam 1 in the first longitudinal direction II, the connection structure 5 of some secondary support beams 6 comes into vertical support simultaneously on the lateral receiving chutes. 2a and 3a or 2b and 3b ( figure 6 ), or only comes to rest on the lateral receiving trough 2a or 2b ( figure 7 ), or only comes in vertical support on the lateral receiving trough 3a or 3b ( figure 8 ).

Quelle(s) que soi(en)t la ou les goulottes latérales de réception 2a, 2b, 3a et 3b sur lesquelles viennent en appui les structures de raccordement 5 respectives des poutrelles secondaires de soutien 6, les surfaces supérieures portantes 60 des poutrelles secondaires de soutien 6 sont toutes situées à une même hauteur par rapport à la poutrelle primaire de soutien 1 selon la direction verticale V-V. Cela procure à la structure de soutien pour coffrage de dalle ou analogue, fabriquée à partir de poutrelles primaires de soutien 1 et de poutrelles secondaires de soutien 6, une surface supérieure portante plane avec de préférence, comme illustré sur les figures 6 à 8, les surfaces supérieures portantes 60 des poutrelles secondaires de soutien 6 situées dans le même plan P que la surface supérieure portante 100 de la poutrelle primaire de soutien 1.Which (s) are the lateral receiving channel (s) 2a, 2b, 3a and 3b on which the respective connecting structures of the secondary supporting beams 6, the supporting upper surfaces 60 of the secondary beams, bear respectively? 6 support are all located at the same height relative to the primary support beam 1 in the vertical direction VV. This provides the slab formwork support structure or the like, made from primary support beams 1 and secondary support beams 6, with a plane bearing top surface preferably, as shown in FIGS. Figures 6 to 8 , the upper bearing surfaces 60 secondary support beams 6 located in the same plane P as the bearing surface 100 of the primary support beam 1.

La présente invention n'est pas limitée aux modes de réalisation qui ont été explicitement décrits, mais elle en inclut les diverses variantes et généralisations contenues dans le domaine des revendications ci-après.The present invention is not limited to the embodiments which have been explicitly described, but it includes the various variants and generalizations thereof within the scope of the claims below.

Claims (12)

  1. Primary support beam (1) for slab formwork or the like, having a load-bearing upper surface (100) designed to bear a load, extending in a first longitudinal direction (I-I), comprising a first segment (2) and a second segment (3) extending respectively in second (II-II) and third (III-III) longitudinal directions, said first (2) and second (3) segments being arranged so as to slide with respect to one another in the first longitudinal direction (I-I) by rail means (4) such that they can be displaced between a retracted position in which one segment (2, 3) is more overlapped by the other, and at least one extended position in which one segment (2, 3) is less overlapped by the other than in the retracted position, in which:
    - on each side on the first (2) and second (3) segments, there are provided respective lateral receiving channels (2a, 2b, 3a, 3b) for receiving a secondary support beam (6),
    - each lateral receiving channel (2a, 2b, 3a, 3b) comprises:
    • a lateral flange (20a, 20b, 30a, 30b) designed to receive, bearing vertically, the connecting structure (5) of a secondary support beam (6),
    • a lateral rim (23a, 23b, 33a, 33b) shaped so as to oppose any axial displacement outside the first longitudinal direction (I-I) of the connecting structure (5) of the secondary support beam (6), extending from and away from the lateral flange (20a, 20b, 30a, 30b) towards the load-bearing upper surface (100),
    characterized in that:
    - said first (2) and second (3) segments are arranged and held so as to always be co-linear with respect to one another in the first longitudinal direction (I-I) by the rail means (4),
    - the respective lateral receiving channels (2a, 2b, 3a, 3b) of the first (2) and second (3) sections slide one inside the other and have a permanent overlap (r) with respect to one another in the first longitudinal direction (I-I) whatever the relative positions of the first (2) and second (3) segments with respect to one another, sliding between the retracted position and said at least one extended position.
  2. Primary support beam (1) according to claim 1, characterized in that:
    - the lateral flanges (20a, 20b) of the lateral receiving channels (2a, 2b) of the first segment (2) are remote from the respective lateral flanges (30a, 30b) of the lateral receiving channels (3a, 3b) of the second segment (3) by a distance (d) of between approximately 4 mm and approximately 10 mm.
  3. Primary support beam (1) according to either of claims 1 and 2, characterized in that stop means (7) limit the travel of the first (2) and second (3) segments with regard to one another and define a maximum extension position.
  4. Primary support beam (1) according to any one of claims 1 to 3, characterized in that the rail means (4) comprise:
    - on one of the first (2) or second (3) segments, at least one longitudinal rib (16a, 16b),
    - on the other of the first (2) or second (3) segments, at least one longitudinal groove (17a, 17b) that is shaped so as to receive said at least one longitudinal rib (16a, 16b) such that it can slide in the first longitudinal direction (I-I).
  5. Primary support beam (1) according to claim 4, characterized in that the longitudinal rib (16a, 16b) and the longitudinal groove (17a, 17b) are shaped such that the longitudinal groove (17a, 17b) receives the longitudinal rib (16a, 16b) in a retentive manner such that it prevents the longitudinal rib (16a, 16b) from being extracted from the longitudinal groove (17a, 17b) in the event of an extraction movement exerted in a direction transverse to the first longitudinal direction (I-I).
  6. Primary support beam (1) according to claim 5, characterized in that:
    - the longitudinal rib (16a, 16b) comprises a cross section having an outer contour that extends over more than 180° in terms of angle,
    - the longitudinal groove (17a, 17b) comprises a cross section formed so as to receive the longitudinal rib (16a, 16b) in an inner contour with an overlap (R) that extends over more than 180° in terms of angle.
  7. Primary support beam (1) according to any one of claims 1 to 6, characterized in that:
    - the first (2) and second (3) segments each have a portion (U2, U3) of cross section essentially in the shape of an inverted U, with two branches (U20, U21, U30, U31) connected by a base, said portions being arranged so as to overlap one another,
    - the rail means (4) are arranged between the two portions (U2, U3) of cross section essentially in the shape of an inverted U, at the base (U22, U32) of the U.
  8. Primary support beam (1) according to any one of claims 1 to 7, characterized in that locking means (14) make it possible to immobilize the first (2) and second (3) segments with respect to one another in the first longitudinal direction (I-I).
  9. Primary support beam (1) according to any one of claims 1 to 8, characterized in that:
    - the first (2) and second (3) segments respectively comprise a first profile (200) and a second profile (300) that are partially fitted one inside the other so as to slide in the first longitudinal direction (I-I),
    - the first (200) and second (300) profiles each have a free end (18, 19) comprising a catching snout (20) designed to engage with a support stay.
  10. Primary support beam (1) according to claim 9, characterized in that:
    - the first segment (2) comprises, at its free end (18), a joining profile (22) bearing the catching snout (20),
    - the joining profile (22) comprises a cross section that is identical to the cross section of the second profile (300), and is arranged so as to continuously extend the second profile (300) when the first (2) and second (3) segments are in the retracted position,
    - a protection profile (21) extends from the joining profile (22) and inside the second profile (300).
  11. Support structure for slab formwork or the like, comprising:
    - at least one primary support beam (1) according to any one of claims 1 to 10,
    - at least one secondary support beam (6) having a connecting structure (5) designed to be received bearing vertically in the lateral receiving channels (2a, 2b, 3a, 3b) of the first segment (2) or of the second segment (3), and having a load-bearing upper surface (60) designed to bear a load,
    characterized in that the connecting structure (5) and the lateral receiving channels (2a, 2b, 3a, 3b) of the first (2) and second (3) segments are formed such that, when the connecting structure (5) is located simultaneously aligned with a lateral receiving channel (2a, 2b) of the first segment (2) and with a lateral receiving channel (3a, 3b) of the second segment (3), the connecting structure (5) simultaneously bears vertically on the lateral receiving channel (2a, 2b) of the first segment (2) and on the lateral receiving channel (3a, 3b) of the second segment (3).
  12. Support structure according to claim 11, characterized in that:
    - each lateral receiving channel (2a, 2b) of the first segment (2) comprises a lateral overlap flange (24a, 24b) that transversely covers, at least in part, the lateral rim (33a, 33b) of the lateral receiving channels (3a, 3b) of the second segment (3),
    - when the connecting structure (5) is located simultaneously aligned with a lateral receiving channel (2a, 2b) of the first segment (2) and with a lateral receiving channel (3a, 3b) of the second segment (3), the connecting structure (5) simultaneously bears vertically on the lateral flange (30a, 30b) of the lateral receiving channel (3a, 3b) of the second segment (3) and on the lateral overlap flange (24a, 24b) of the lateral receiving channel (2a, 2b) of the first segment (2).
EP15179740.4A 2014-08-05 2015-08-04 Primary support beam with adjustable length Active EP2982813B8 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1457622A FR3024744B1 (en) 2014-08-05 2014-08-05 ADJUSTABLE LENGTH PRIMARY SUPPORT BEAM

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EP2982813A1 EP2982813A1 (en) 2016-02-10
EP2982813B1 true EP2982813B1 (en) 2017-02-15
EP2982813B8 EP2982813B8 (en) 2017-05-03

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US10472823B2 (en) 2016-06-24 2019-11-12 Apache Industrial Services, Inc. Formwork system
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US11976483B2 (en) 2016-06-24 2024-05-07 Apache Industrial Services, Inc Modular posts of an integrated construction system
DE202020100700U1 (en) * 2020-02-10 2021-02-11 Peri Gmbh Equalizing beam
CN114319934B (en) * 2022-01-17 2023-06-16 浙江省一建建设集团有限公司 Post-cast strip temporary roof returning construction process

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DE801952C (en) * 1949-09-30 1951-01-29 Karlheinz Eickhoff Extendable formwork beam
US3108663A (en) * 1959-09-10 1963-10-29 Reynolds Metals Co Extrusion construction
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US11702852B2 (en) * 2019-10-10 2023-07-18 Titan Formwork Systems, Llc Adjustable beam

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EP2982813A1 (en) 2016-02-10
FR3024744B1 (en) 2021-04-16
FR3024744A1 (en) 2016-02-12
EP2982813B8 (en) 2017-05-03

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