EP1067254B1 - Casing for reinforcement connection box and reinforcement connection box with such casing - Google Patents

Casing for reinforcement connection box and reinforcement connection box with such casing Download PDF

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Publication number
EP1067254B1
EP1067254B1 EP00420133A EP00420133A EP1067254B1 EP 1067254 B1 EP1067254 B1 EP 1067254B1 EP 00420133 A EP00420133 A EP 00420133A EP 00420133 A EP00420133 A EP 00420133A EP 1067254 B1 EP1067254 B1 EP 1067254B1
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EP
European Patent Office
Prior art keywords
box
caisson
faces
additional elements
main
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EP00420133A
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German (de)
French (fr)
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EP1067254A1 (en
Inventor
René Augert
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Fimurex SAC
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Fimurex SAC
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/12—Mounting of reinforcing inserts; Prestressing
    • E04G21/125—Reinforcement continuity box

Definitions

  • the invention relates to the field of public works and construction. It is more specifically a new box structure of waiting box.
  • a waiting box is a support device for reinforcements connection between two elements of reinforced concrete construction.
  • a box of waiting encloses the folded ends of the reinforcements in the apparent part intended to be embedded in the concrete of one of the building elements.
  • these frames In known manner, these frames must be held in place during the pouring concrete during the production of a wall or slab.
  • These frames are usually partially contained inside a device called "box waiting ", and consists of a box that encloses the folded ends of the frames while leaving apparent the part of the frames that will be embedded in the concrete. After pouring the concrete, we eliminate the box waiting to appear the ends of the frames that have been isolated from the concrete. The folded ends reinforcements are then unfolded and then embedded inside the adjacent element.
  • cartons even selected from water-repellent boards have the essential disadvantage of poorly resisting moisture and especially so in contact with the concrete.
  • stripping is necessary rather quickly, which is to the detriment of quality of the concrete, and in particular causes the appearance of wrinkles or other irregularities on the entire surface of the concrete.
  • the operation of eliminate the waiting box is relatively difficult because the tears on the damaged cardboard occur randomly, and the elimination is often by shreds.
  • a first problem that the invention proposes to solve is that of the resistance of the waiting box to the ambient humidity during storage, and contact of the water contained in the concrete during pouring.
  • Another problem that proposes to solve the invention is that of the late stripping of the box of the box waiting period, that is to say the elimination of the caisson after a very long stay in the concrete contact.
  • US 4,984,401 discloses a box box according to the preamble of claim 1 can, among other things, be made of polypropylene.
  • Another problem that the invention proposes to solve is that of the incompatibility between the ease of dismantling and the rigidity of the box.
  • the invention therefore aims to solve all of these problems by proposing a box box waiting that is easy to manufacture, easily extractable from the reservation in which it is incorporated, while having a high rigidity and resistance to the pressure exerted by the concrete during casting.
  • the invention consists in using a material which presents a very good resistance, which gives a very high rigidity to the box waiting while facilitating the extraction of the box by manual cutting from tears made very simply by a tool such as a knife or the like.
  • the cellular polypropylene has the advantage of tearing easily only when a primer or precut has been made in parallel with a cell. Inversely, cellular polypropylene is particularly difficult to tear when no area of weakness has been formed.
  • the cells of the main and lateral faces are parallel to the largest dimension of the box.
  • the rigidity of the box is optimal, and the stripping operations are facilitated, since a simple cutting primer to one end of the box allows the tearing of the constituent leaf of the box over its entire length.
  • the presence of additional elements at the level of the faces side rails provides sufficient rigidity to prevent crushing phenomena which are exercised essentially perpendicular to the main face of the caisson. It is therefore possible to use cellular polypropylene sheets of relatively low surface density while maintaining excellent resistance to pressure.
  • the box is such that one of the main faces is made by two flaps adjacent to the side faces.
  • at least one of the flaps can extend by a flap which is folded towards the inside of the box to form a reinforcing element substantially parallel to a lateral face.
  • such a box then comprises a spacer element placed between these faces which improves its resistance to the forces exerted by the concrete during the casting.
  • the additional elements have cells that can adopt different orientations.
  • the cells of the additional elements are parallel to those of the box, it facilitates the possible folding of these elements additional and thus the manufacture of the box.
  • the elements additional cells have cells that are perpendicular to those of the box, the stiffness of the side faces in one direction is very significantly increased perpendicular to the main face of the box, so we get a box of waiting to withstand particularly high pressures while being extremely light.
  • the additional elements may also adopt forms and architectures very varied.
  • the additional elements may be present only in relation to the faces side.
  • the additional elements can also come in front of the flaps forming one of the main faces. They can also come to the eye the central reinforcing element, when it is present.
  • the additional elements can be connected to each other by a common face which is located in look at the main face pierced with openings.
  • the box comprises a second structure substantially similar to the outer structure, and which constitutes in a way a second internal box.
  • the flaps forming one of the main faces can be secured by an adhesive tape, or even by welding.
  • the main face on which are formed the openings of passage of the frames may have slots connecting these openings to facilitate the setting up of the frames.
  • the adhesive tape present on the Opposite face is extended on the face presenting the openings.
  • the adhesive tape can then close the slot located closest to the end of the box, avoiding thereby even the passage of liquid concrete.
  • the frames are introduced into boxes by the ends of the arms waiting.
  • the invention relates to a waiting box equipped with a box made by folding a sheet made of cellular polypropylene.
  • FIG. sheet comprises several flaps for forming the different faces of the box.
  • the central flap (2) is intended to form one of the main faces of the box waiting, through which are set up binding frames.
  • This component central (2) is framed by two lateral flaps (3, 4) intended to each form a side faces of the box. These side flaps (3, 4) are adjacent to two additional flaps (5, 6) each to form half of the face main opposite to the main face (2).
  • shutters (5, 6) extend laterally by flaps (7, 8), of a width substantially equal to that of a lateral face (3, 4), and intended, after folding, when the two extreme edges (9, 10) flaps (5, 6) come into contact, forming a reinforcing element forming a spacer (13) between the main faces (2, 12) of the box, as shown in Figure 2.
  • the central flap (2) forming one of the main faces extends to the level its small sides, by two rectangular flaps (14, 15), intended to close the ends of the box to ensure tightness.
  • These flaps (14, 15) comprise two tabs (17, 19) intended to penetrate inside the box during the flap of the rectangular flap (14, 15).
  • These two legs (17, 19) are separated by a slot central (20, 21) corresponding to the location of the reinforcing element central (13) forming a spacer.
  • the box also comprises elements (50, 51) located on the side faces (5, 6) of the box, on the side inside.
  • These additional elements (50, 51) can be either free bands placed inside the box during its folding, or even strips glued or welded on the sheet (1) before folding.
  • Figure 1 illustrates the sheet (1) exempt from these additional elements.
  • These additional elements (50, 51) are also in cellular polypropylene.
  • the cells of the additional elements (50, 51) are oriented perpendicular to the cells of the rest of the box, which increases the resistance to the forces perpendicular to the main face (2).
  • an additional additional element (53) can also be provided to be placed between the flaps (7, 8) forming the spacer (13).
  • the cells of the rest of the caisson, with the exception additional elements are parallel to the large direction of the main face (2, 12) to ensure a good rigidity of the waiting box while maintaining a minimum weight and ease of extraction of the box.
  • the cellular polypropylene used has a thickness ranging from one to eight millimeters, preferably between 1.5 and 4 millimeters.
  • the density can vary depending on the size of the waiting box, and can vary between 150 and 1200 grams per square meter, and preferentially be between 150 and 600 grams per square meter.
  • polypropylenes cells with different characteristics between the rest of the box and the elements additional (50, 53).
  • additional elements consisting of strips made from polypropylene with a thickness of around 4 millimeters, and whose density is between 100 and 600 grams per square meter, preferably close to 500 grams per square meter.
  • the type of cells can be variable, and their section can be indifferently square, slightly rectangular or oblique, or inverted chevrons.
  • the main phase which comprises the openings (23, 24) intended to receive the metal reinforcements may have slots (25) connecting the openings (23, 24) of the same frame, to facilitate its implementation.
  • the two shutters (5, 6) are secured by means of a long adhesive tape (28) which can advantageously extend to the level of the end (14) of the box, and further still, at the slot located the most near the end of the box, as shown in Figure 9. This avoids the slot (25) in question to open under the effect of the elasticity of the feet (29) made in level of the ends of the box.
  • the structure of the box according to the invention can be adapted to numerous types of reinforcement, and in particular U-shaped frames (30) comprising two arms (31) passing through the main face (2) of the box, but also the single-sided armatures.
  • the passage holes of the reinforcements are distributed also on a regular basis, and arranged on both sides of the plane of symmetry central of the box.
  • the additional elements are in the form of a band comprising two folds (55, 56) defining three segments (57, 58, 59).
  • the first segment (57) comes opposite the side face (3).
  • the second segment (58) comes opposite the flap (5) forming half of the main face (12).
  • the third segment (59) comes into contact with the flap (7) forming a part of the spacer.
  • the rigidity of the box is further improved since the first and third segments (57, 59) provide a stiffening of the box in a direction perpendicular to the main face (2), while the second segment (58) ensures the stiffening of the waiting box with respect to the forces exerted perpendicular to the lateral faces (3, 4).
  • the orientation of the alveoli of the additional element (54) can be chosen either perpendicular to the orientation of the cells of the rest of the box, to greatly increase the rigidity of the assembly, or still parallel to the orientation of the cells of the rest of the box to facilitate the realization of the folds (55, 56).
  • the different segments (57, 58, 59) are made independently, they can each be welded or glued on the faces cores, possibly with a separate orientation of their alveoli. For reasons of symmetry, two identical elements (54) are set place in the same box.
  • Figures 4 to 6 illustrate an alternative embodiment in which the element additional (60) extends over the entire inner surface of the box.
  • the additional element (60) comprises a first segment (64) which comes in front of the main face (2) of the rest of the box. This segment (54) has openings for the passage of reinforcements, located in the same places as those formed on the main face (2).
  • the additional element (60) comprises two lateral segments (63, 65) coming respectively with respect to side faces (3, 4) of the rest of the box.
  • the element (60) also includes two segments (62, 66) engaging the flaps (6, 5) forming the main face (12).
  • the additional element (60) can also comprise two segments (61, 67) coming into contact with the flaps (7, 8) forming the spacer. In this case placement of the jumper (22) maintains contact between the segments (61, 67) of the additional element and the shutters (7, 8) of the rest of the box.
  • FIGS. 7 and 8 another geometry can be adopted as illustrated in the FIGS. 7 and 8, in which the flaps (35, 36) adjacent to the lateral faces (33, 34) have a width less than half of the main face (32).
  • the remaining surface is occupied by an additional chute (40) set up as illustrated in Figure 7, so as to constitute two reinforcing elements (41, 42) forming a spacer, and thus increasing the stiffness and compressive strength of the concrete during casting.
  • the box may comprise three additional elements (72, 73, 74).
  • the additional elements (72, 74) are place respectively between the lateral faces (33) and (34), and the shutters forming part of the spacer element (41, 42).
  • Element (73) is put in place at the interior of the additional trough (40), and its lateral segments (75, 76) part of the spacer elements (41, 42). It is conceivable that the rigidity of such a box waiting is particularly important.
  • the orientation of the cells of the internal faces (33, 34) and the reinforcing elements (41, 42) can be chosen to provide resistance optimal for crushing.
  • the flaps (46) at the end of the box are each equipped with three legs (37, 38, 39) separated by slots (44, 45) corresponding to the locations of the reinforcing elements (41, 42) forming spacer (see Figure 7).
  • the geometry of the invention can be broken down according to desired dimensions of the waiting box. So, in practice, it is possible to make boxes that are one to five centimeters thick and wide between five and twenty five centimeters.
  • the pitch between the openings (23, 24) reception of reinforcements can be chosen according to the constraints of standardization specific to construction.
  • the waiting boxes according to the invention will show a length of the order of one meter, compared with conventional waiting boxes which have a length corresponding to a standard wall height, substantially 2.40 m to 2.50 m.
  • two elements will be necessary to cover a space of 2.40 meters.
  • the space between the two waiting boxes as well as the volumes located at the ends of the waiting boxes being intended to receive the concrete during casting. This originality remains consistent with the rules of concrete construction armed.
  • the extraction operation of the box after the formwork is carried out as follows.
  • the main face of the box is flush.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Connection Or Junction Boxes (AREA)
  • Superstructure Of Vehicle (AREA)
  • Cartons (AREA)

Abstract

The cover, designed for reinforcing elements used to connect two separate cast concrete structures in civil engineering, is in the form of a box with two main faces (2, 12), one of which has holes for the reinforcing elements, and two side faces (3, 4) joining the main faces. The box is made from twin-wall polypropylene with its channels running parallel to the longer dimensions of the main and side faces; it can also have additional panels (50, 51) against the side faces.

Description

Domaine techniqueTechnical area

L'invention se rattache au domaine des travaux publics et de la construction. Elle vise plus précisément une nouvelle structure de caisson de boíte d'attente. De façon générale, une boíte d'attente est un dispositif de support pour des armatures de liaison entre deux éléments de construction en béton armé. Une boíte d'attente renferme donc les extrémités repliées des armatures dans la partie apparente destinée à être noyée dans le béton d'un des éléments de construction.The invention relates to the field of public works and construction. It is more specifically a new box structure of waiting box. Of Generally speaking, a waiting box is a support device for reinforcements connection between two elements of reinforced concrete construction. A box of waiting encloses the folded ends of the reinforcements in the apparent part intended to be embedded in the concrete of one of the building elements.

Techniques antérieuresPrevious techniques

De façon connue, lors de la construction d'un édifice comportant plusieurs éléments (murs ou dalles) en béton armé, on met en place sur les extrémités supérieures ou latérales de ces éléments des armatures métalliques destinées à assurer une liaison métallique avec des éléments adjacents. Ces armatures comportent une partie qui est noyée dans le premier élément, et une seconde partie qui sera noyée dans l'élément adjacent.In known manner, during the construction of a building comprising several elements (walls or slabs) made of reinforced concrete, we put in place on the ends upper or side of these elements of metal reinforcements intended for ensure a metallic connection with adjacent elements. These frames have a part that is embedded in the first element, and a second part which will be embedded in the adjacent element.

De façon connue, ces armatures doivent être maintenues en place lors du coulage du béton pendant la réalisation d'un mur ou d'une dalle. Ces armatures sont généralement partiellement contenues à l'intérieur d'un dispositif appelé "boíte d'attente", et constituée d'un caisson qui renferme les extrémités repliées des armatures tout en laissant apparente la partie des armatures qui sera noyée dans le béton. Après avoir coulé le béton, on élimine la boíte d'attente pour faire apparaítre les extrémités des armatures qui ont été isolées du béton. Les extrémités repliées des armatures sont alors dépliées puis noyées à l'intérieur de l'élément adjacent.In known manner, these frames must be held in place during the pouring concrete during the production of a wall or slab. These frames are usually partially contained inside a device called "box waiting ", and consists of a box that encloses the folded ends of the frames while leaving apparent the part of the frames that will be embedded in the concrete. After pouring the concrete, we eliminate the box waiting to appear the ends of the frames that have been isolated from the concrete. The folded ends reinforcements are then unfolded and then embedded inside the adjacent element.

De nombreuses structures et géométries de caisson ont déjà été proposées, mais elles présentent toutes de multiples inconvénients.Many structures and box geometries have already been proposed, but they all have multiple disadvantages.

Ainsi, on a proposé dans le document EP 0 152 015 de réaliser un caisson de boíte d'attente à partir d'une plaque carton pliée. L'emploi d'une telle matière s'avère avantageuse pour assurer un pliage aisé, et selon une géométrie facilement adaptable à l'encombrement souhaité. Thus, it has been proposed in EP 0 152 015 to make a box of box waiting from a folded cardboard plate. The use of such a material is advantageous for ensuring easy folding, and in a geometry easily adaptable to the desired size.

Néanmoins, les cartons, même sélectionnés parmi les cartons hydrofuges présentent l'inconvénient essentiel de mal résister à l'humidité et notamment donc au contact du béton. Ainsi, pour éviter une dégradation trop rapide du carton, il est nécessaire de procéder au décoffrage assez rapidement, ce qui se fait au détriment de la qualité du béton, et notamment provoque l'apparition d'épaufrures ou autres irrégularités sur toute la surface du béton. En outre, l'opération consistant à éliminer la boíte d'attente est relativement difficile du fait que les déchirures sur le carton abímé se produisent de façon aléatoire, et l'élimination se fait souvent par lambeaux.Nevertheless, cartons, even selected from water-repellent boards have the essential disadvantage of poorly resisting moisture and especially so in contact with the concrete. Thus, to avoid a too rapid degradation of the cardboard, it is stripping is necessary rather quickly, which is to the detriment of quality of the concrete, and in particular causes the appearance of wrinkles or other irregularities on the entire surface of the concrete. In addition, the operation of eliminate the waiting box is relatively difficult because the tears on the damaged cardboard occur randomly, and the elimination is often by shreds.

Un premier problème que se propose donc de résoudre l'invention est celui de la résistance de la boíte d'attente à l'humidité ambiante lors du stockage, et au contact de l'eau contenue dans le béton lors du coulage. Un autre problème que se propose de résoudre l'invention est celui du décoffrage tardif du caisson de la boíte d'attente, c'est-à-dire de l'élimination du caisson après un très long séjour au contact du béton.A first problem that the invention proposes to solve is that of the resistance of the waiting box to the ambient humidity during storage, and contact of the water contained in the concrete during pouring. Another problem that proposes to solve the invention is that of the late stripping of the box of the box waiting period, that is to say the elimination of the caisson after a very long stay in the concrete contact.

Par ailleurs, on a proposé un autre document FR 2 575 506, EP 0 252 996, et US 4 984 401, de réaliser des boítes d'attente en matière plastique, et notamment en polychlorure de vinyle (PVC). Outre, la nocivité du chlore produit lors de la combustion de ces matériaux, une telle solution présente de nombreux inconvénients, et notamment une grande difficulté pour réaliser l'opération de décoffrage. En effet, les matériaux utilisés présentent une certaine élasticité qui doit permettre la déformation de la boíte d'attente lors de son extraction de la réservation créée dans l'élément de béton. Or, pour obtenir une rigidité suffisante de l'ensemble du caisson, il est nécessaire d'utiliser un matériau d'une épaisseur importante qui s'avère plus difficile à déformer, et pratiquement impossible à découper, du moins avec des outils courants. En outre, avec l'emploi du PVC, on observe au bout de quelques semaines, une réaction chimique entre le caisson et le béton proprement dit, qui rend difficile le décoffrage, et peut provoquer des arrachements de matière.Furthermore, another document FR 2 575 506, EP 0 252 996 has been proposed, and US 4 984 401, to make plastic waiting boxes, and in particular in polyvinyl chloride (PVC). Besides, the harmfulness of the chlorine produced during the combustion of these materials, such a solution has many disadvantages, and in particular a great difficulty in carrying out the operation of stripping. Indeed, the materials used have a certain elasticity which must allow the deformation of the waiting box during its extraction from the reservation created in the concrete element. However, to obtain sufficient rigidity of the entire box, it is necessary to use a material of a thickness important that is more difficult to distort, and virtually impossible to cut, at least with common tools. In addition, with the use of PVC, observed after a few weeks, a chemical reaction between the box and the concrete itself, which makes the formwork difficult, and may tearing of material.

Le document US 4,984,401 décrit un caisson de boíte d'attente selon le préambule de la revendication 1 pouvant, entre autre, être fabriqué en polypropylène.US 4,984,401 discloses a box box according to the preamble of claim 1 can, among other things, be made of polypropylene.

Un autre problème que se propose de résoudre l'invention est celui de l'incompatibilité entre la facilité de décoffrage et la rigidité du caisson. Another problem that the invention proposes to solve is that of the incompatibility between the ease of dismantling and the rigidity of the box.

L'invention vise donc à résoudre l'ensemble de ces problèmes en proposant un caisson de boíte d'attente qui soit facile à fabriquer, aisément extractible de la réservation dans laquelle elle est incorporée, tout en possédant une forte rigidité et une résistance à la pression exercée par le béton lors du coulage.The invention therefore aims to solve all of these problems by proposing a box box waiting that is easy to manufacture, easily extractable from the reservation in which it is incorporated, while having a high rigidity and resistance to the pressure exerted by the concrete during casting.

Exposé de l'inventionPresentation of the invention

L'invention concerne donc un caisson de boíte d'attente pour la mise en place d'armatures de liaison entre deux parties d'ouvrage en béton, réalisé par le pliage d'une feuille de matériau pliable, et comprenant :

  • deux faces principales parallèles, dont l'une est percée d'ouvertures de passage des armatures de liaison ;
  • deux faces latérales reliant les faces principales.
The invention therefore relates to a box box waiting for the establishment of reinforcing links between two parts of concrete structure, made by folding a sheet of foldable material, and comprising:
  • two parallel main faces, one of which is pierced with passage openings of the connecting armatures;
  • two side faces connecting the main faces.

Ce caisson se caractérise en ce que :

  • le matériau utilisé pour réaliser les caissons est du polypropylène alvéolaire dont les alvéoles, au moins au niveau des faces principales et latérales, sont parallèles à la plus grande direction du caisson ;
  • il comporte des éléments additionnels également en polypropylène alvéolaire, au moins en regard des faces latérales.
This box is characterized in that:
  • the material used to make the boxes is cellular polypropylene whose cells, at least at the main and lateral faces, are parallel to the largest direction of the box;
  • it comprises additional elements also in cellular polypropylene, at least facing the lateral faces.

Autrement dit, l'invention consiste à utiliser un matériau qui présente une très bonne résistance, ce qui confère ainsi une très grande rigidité à la boíte d'attente tout en facilitant l'extraction du caisson par la découpe manuelle à partir de déchirures réalisées très simplement par un outil tel qu'un couteau ou équivalent.In other words, the invention consists in using a material which presents a very good resistance, which gives a very high rigidity to the box waiting while facilitating the extraction of the box by manual cutting from tears made very simply by a tool such as a knife or the like.

En effet, le polypropylène alvéolaire a pour avantage de se déchirer aisément uniquement lorsqu'une amorce ou une prédécoupe a été réalisée parallèlement à une alvéole. A l'inverse, le polypropylène alvéolaire est particulièrement difficile à déchirer lorsqu'aucune zone de faiblesse n'y a été formée.Indeed, the cellular polypropylene has the advantage of tearing easily only when a primer or precut has been made in parallel with a cell. Inversely, cellular polypropylene is particularly difficult to tear when no area of weakness has been formed.

Les alvéoles des faces principales et latérales sont parallèles à la plus grande dimension du caisson. De la sorte, la rigidité du caisson est optimale, et les opérations de décoffrage sont facilitées, puisqu'une simple amorce de découpe à une extrémité du caisson permet la déchirure de la feuille constitutive du caisson sur toute sa longueur. La présence des éléments additionnels au niveau des faces latérales assure une rigidité suffisante pour prévenir les phénomènes d'écrasement qui sont exercés essentiellement perpendiculairement à la face principale du caisson. Il est donc possible d'utiliser des feuilles de polypropylène alvéolaire de relativement faible masse surfacique tout en conservant une excellente résistance à la pression.The cells of the main and lateral faces are parallel to the largest dimension of the box. In this way, the rigidity of the box is optimal, and the stripping operations are facilitated, since a simple cutting primer to one end of the box allows the tearing of the constituent leaf of the box over its entire length. The presence of additional elements at the level of the faces side rails provides sufficient rigidity to prevent crushing phenomena which are exercised essentially perpendicular to the main face of the caisson. It is therefore possible to use cellular polypropylene sheets of relatively low surface density while maintaining excellent resistance to pressure.

En pratique, le caisson est tel qu'une des faces principales est réalisé par deux rabats adjacents aux faces latérales. Avantageusement, au moins un des rabats peut se prolonger par un volet qui est replié vers l'intérieur du caisson pour former un élément de renforcement sensiblement parallèle à une face latérale. Autrement dit, un tel caisson comprend alors un élément entretoise mis en place entre ces faces principales, ce qui améliore sa résistance aux efforts exercés par le béton lors du coulage.In practice, the box is such that one of the main faces is made by two flaps adjacent to the side faces. Advantageously, at least one of the flaps can extend by a flap which is folded towards the inside of the box to form a reinforcing element substantially parallel to a lateral face. In other words, such a box then comprises a spacer element placed between these faces which improves its resistance to the forces exerted by the concrete during the casting.

Les éléments additionnels présentent des alvéoles qui peuvent adopter différentes orientations. Ainsi, lorsque les alvéoles des éléments additionnels sont parallèles à celles du caisson, on facilite le pliage éventuel de ces éléments additionnels et donc la fabrication du caisson. A l'inverse, lorsque les éléments additionnels présentent des alvéoles qui sont perpendiculaires à celles du caisson, on augmente très fortement la rigidité des faces latérales dans un sens perpendiculaire à la face principale du caisson, et on obtient donc une boíte d'attente apte à supporter des pressions particulièrement élevées tout en étant extrêmement légères.The additional elements have cells that can adopt different orientations. Thus, when the cells of the additional elements are parallel to those of the box, it facilitates the possible folding of these elements additional and thus the manufacture of the box. Conversely, when the elements additional cells have cells that are perpendicular to those of the box, the stiffness of the side faces in one direction is very significantly increased perpendicular to the main face of the box, so we get a box of waiting to withstand particularly high pressures while being extremely light.

Les éléments additionnels peuvent également adopter des formes et des architectures très variées.The additional elements may also adopt forms and architectures very varied.

Ainsi, les éléments additionnels peuvent n'être présents qu'au regard des faces latérales. Les éléments additionnels peuvent venir également en regard des rabats formant une des faces principales. Ils peuvent également venir en outre au regard de l'élément de renforcement central, lorsque celui-ci est présent.Thus, the additional elements may be present only in relation to the faces side. The additional elements can also come in front of the flaps forming one of the main faces. They can also come to the eye the central reinforcing element, when it is present.

Dans une forme particulièrement avantageuse, les éléments additionnels peuvent être reliés l'un à l'autre par une face commune qui se trouve situer en regard de la face principale percée d'ouvertures. Autrement dit, le caisson comprend une seconde structure sensiblement analogue à la structure extérieure, et qui constitue en quelque sorte un deuxième caisson interne. In a particularly advantageous form, the additional elements can be connected to each other by a common face which is located in look at the main face pierced with openings. In other words, the box comprises a second structure substantially similar to the outer structure, and which constitutes in a way a second internal box.

En pratique, les rabats formant une des faces principales peuvent être solidarisés soit par un ruban adhésif, ou bien encore par soudure.In practice, the flaps forming one of the main faces can be secured by an adhesive tape, or even by welding.

En pratique, la face principale sur laquelle sont ménagées les ouvertures de passage des armatures peut présenter des fentes reliant ces ouvertures pour faciliter la mise en place des armatures.In practice, the main face on which are formed the openings of passage of the frames may have slots connecting these openings to facilitate the setting up of the frames.

Dans ce cas, il peut s'avérer avantageux que le ruban adhésif présent sur la face opposé se prolonge sur la face présentant les ouvertures. Le ruban adhésif peut alors obturer la fente située le plus prés de l'extrémité du caisson, évitant par là même le passage de béton liquide.In this case, it may be advantageous for the adhesive tape present on the Opposite face is extended on the face presenting the openings. The adhesive tape can then close the slot located closest to the end of the box, avoiding thereby even the passage of liquid concrete.

Dans les variantes d'exécution dans lesquelles le caissons ne comporte pas de fente, les armatures sont introduites dans des caissons par les extrémités des bras en attente.In the variant embodiments in which the casings do not have any slot, the frames are introduced into boxes by the ends of the arms waiting.

Description sommaire des figuresBrief description of the figures

La manière de réaliser l'invention ainsi que les avantages qui en découlent ressortiront bien de la description des modes de réalisation qui suivent, à l'appui des figures annexées, dans lesquelles :

  • La figure 1 est une vue de dessus d'un caisson conforme à l'invention montré déplié.
  • La figure 2 est une vue en coupe transversale de caisson montré en figure 1 une fois replié.
  • Les figures 3 et 4 sont des vues en coupe transversale des variantes de réalisation du caisson de la figure 2.
  • La figure 5 est une vue en perspective sommaire du caisson illustré à la figure 4.
  • La figure 6 est une vue en perspective sommaire du caisson illustré à la figure 5 dans lequel les éléments de renforcement apparaissent de façon distincte du reste du caisson.
  • La figure 7 est une vue de dessus d'un caisson réalisé conformément à une variante de réalisation comprenant trois volumes distincts, correspondants à des boítes d'attente de plus grande dimension.
  • La figure 8 est une vue en coupe transversale du caisson de la figure 7.
  • La figure 9 est une vue en coupe longitudinale médiane de l'extrémité d'une boíte d'attente réalisée conformément à l'invention.
  • Les figures 10, 11 et 12 sont des vues schématiques en perspective illustrant l'opération d'extraction de la boíte d'attente conforme à l'invention.
    • The manner of carrying out the invention as well as the advantages which result therefrom will emerge from the description of the embodiments which follow, in support of the appended figures, in which:
  • Figure 1 is a top view of a box according to the invention shown unfolded.
  • Figure 2 is a cross-sectional view of the box shown in Figure 1 when folded.
  • Figures 3 and 4 are cross-sectional views of the variants of the housing of Figure 2.
  • FIG. 5 is a brief perspective view of the box illustrated in FIG. 4.
  • Figure 6 is a brief perspective view of the box shown in Figure 5 in which the reinforcing elements appear distinctly from the rest of the box.
  • Figure 7 is a top view of a box made according to an alternative embodiment comprising three separate volumes, corresponding to waiting boxes of larger size.
  • Figure 8 is a cross-sectional view of the box of Figure 7.
  • Figure 9 is a longitudinal longitudinal sectional view of the end of a waiting box made according to the invention.
  • Figures 10, 11 and 12 are schematic perspective views illustrating the extraction operation of the waiting box according to the invention.

    • Manière de réaliser l'inventionWay of realizing the invention

    Comme déjà dit, l'invention concerne une boíte d'attente équipée d'un caisson réalisé par pliage d'une feuille réalisée en polypropylène alvéolaire.As already stated, the invention relates to a waiting box equipped with a box made by folding a sheet made of cellular polypropylene.

    La géométrie d'une telle feuille (1) est illustrée à la figure 1. Ainsi, une telle feuille comprend plusieurs volets destinés à former les différentes faces du caisson. Le volet central (2) est destiné à former une des faces principales de la boíte d'attente, à travers laquelle sont mises en place les armatures de liaison. Ce volet central (2) est encadré par deux volets latéraux (3, 4) destinés à former chacun une des faces latérales du caisson. Ces volets latéraux (3, 4) sont adjacents à deux volets supplémentaires (5, 6) destinés à former chacun la moitié de la face principale opposée à la face principale (2). Ces volets (5, 6) se prolongent latéralement par des rabats (7, 8), d'une largeur sensiblement égale à celle d'une face latérale (3, 4), et destinée, après pliage, lorsque les deux arêtes extrêmes (9, 10) des volets (5, 6) viennent en contact, à former un élément de renforcement constituant une entretoise (13) entre les faces principales (2, 12) du caisson, comme illustré à la figure 2.The geometry of such a sheet (1) is illustrated in FIG. sheet comprises several flaps for forming the different faces of the box. The central flap (2) is intended to form one of the main faces of the box waiting, through which are set up binding frames. This component central (2) is framed by two lateral flaps (3, 4) intended to each form a side faces of the box. These side flaps (3, 4) are adjacent to two additional flaps (5, 6) each to form half of the face main opposite to the main face (2). These shutters (5, 6) extend laterally by flaps (7, 8), of a width substantially equal to that of a lateral face (3, 4), and intended, after folding, when the two extreme edges (9, 10) flaps (5, 6) come into contact, forming a reinforcing element forming a spacer (13) between the main faces (2, 12) of the box, as shown in Figure 2.

    Des cavaliers (22) traversant le volet central (2) maintiennent l'entretoise (13) en position verticale.Riders (22) passing through the central flap (2) hold the spacer (13) in a vertical position.

    Le volet central (2), formant une des faces principales se prolonge au niveau de ses petits côtés, par deux rabats rectangulaires (14, 15), destinés à fermer les extrémités du caisson pour en assurer l'étanchéité. Ces volets (14, 15) comportent deux pattes (17, 19) destinées à pénétrer à l'intérieur du caisson lors du rabat du volet rectangulaire (14, 15). Ces deux pattes (17, 19) sont séparées par une fente centrale (20, 21) correspondant à l'emplacement de l'élément de renforcement central (13) formant entretoise. The central flap (2), forming one of the main faces extends to the level its small sides, by two rectangular flaps (14, 15), intended to close the ends of the box to ensure tightness. These flaps (14, 15) comprise two tabs (17, 19) intended to penetrate inside the box during the flap of the rectangular flap (14, 15). These two legs (17, 19) are separated by a slot central (20, 21) corresponding to the location of the reinforcing element central (13) forming a spacer.

    Conformément à l'invention, le caisson comprend également des éléments additionnels (50, 51) situés sur les faces latérales (5, 6) du caisson, du côté intérieur. Ces éléments additionnels (50, 51) peuvent être soit des bandes libres mises en place à l'intérieur du caisson lors de son pliage, ou bien encore des bandes collées ou soudées sur la feuille (1) avant son pliage. La figure 1 illustre la feuille (1) exempte de ces éléments additionnels. Ces éléments additionnels (50, 51) sont également en polypropylène alvéolaire. Dans la forme illustrée à la figure 2, les alvéoles des éléments additionnels (50, 51) sont orientées perpendiculairement aux alvéoles du reste du caisson, ce qui permet d'augmenter la résistance aux efforts exercés perpendiculairement à la face principale (2).According to the invention, the box also comprises elements (50, 51) located on the side faces (5, 6) of the box, on the side inside. These additional elements (50, 51) can be either free bands placed inside the box during its folding, or even strips glued or welded on the sheet (1) before folding. Figure 1 illustrates the sheet (1) exempt from these additional elements. These additional elements (50, 51) are also in cellular polypropylene. In the form illustrated in Figure 2, the cells of the additional elements (50, 51) are oriented perpendicular to the cells of the rest of the box, which increases the resistance to the forces perpendicular to the main face (2).

    Comme illustré à la figure 2, un élément additionnel supplémentaire (53) peut également être prévu pour être mis en place entre les volets (7, 8) formant l'entretoise (13). De façon générale, les alvéoles du reste du caisson, à l'exception des éléments additionnels sont parallèles à la grande direction de la face principale (2, 12) pour assurer une bonne rigidité de la boíte d'attente tout en conservant un poids minimal et une grande facilité d'extraction de la boíte.As illustrated in FIG. 2, an additional additional element (53) can also be provided to be placed between the flaps (7, 8) forming the spacer (13). In general, the cells of the rest of the caisson, with the exception additional elements are parallel to the large direction of the main face (2, 12) to ensure a good rigidity of the waiting box while maintaining a minimum weight and ease of extraction of the box.

    Le polypropylène alvéolaire utilisé présente une épaisseur allant de un à huit millimètres, préférentiellement comprise entre 1,5 et 4 millimètres. La densité peut être variable en fonction de la dimension de la boíte d'attente, et peut varier entre 150 et 1 200 grammes par mètre carré, et préférentiellement être comprise entre 150 et 600 grammes par mètre carré. Il est possible d'utiliser des polypropylènes alvéolaires de caractéristiques différentes entre le reste du caisson et les éléments additionnels (50, 53). Ainsi, on peut utiliser des éléments additionnels constitués de bandes réalisées à partir de polypropylène d'une épaisseur voisine de 4 millimètres, et dont la densité est comprise entre 100 et 600 grammes par mètre carré, préférentiellement voisine de 500 grammes par mètre carré. Le type d'alvéoles peut être variable, et leur section peut être indifféremment carrée, légèrement rectangulaire ou bien encore oblique, ou en chevrons inversés.The cellular polypropylene used has a thickness ranging from one to eight millimeters, preferably between 1.5 and 4 millimeters. The density can vary depending on the size of the waiting box, and can vary between 150 and 1200 grams per square meter, and preferentially be between 150 and 600 grams per square meter. It is possible to use polypropylenes cells with different characteristics between the rest of the box and the elements additional (50, 53). Thus, additional elements consisting of strips made from polypropylene with a thickness of around 4 millimeters, and whose density is between 100 and 600 grams per square meter, preferably close to 500 grams per square meter. The type of cells can be variable, and their section can be indifferently square, slightly rectangular or oblique, or inverted chevrons.

    Selon une autre caractéristique de l'invention, la phase principale qui comporte les ouvertures (23, 24) destinées à accueillir les armatures métalliques, peut présenter des fentes (25) reliant les ouvertures (23, 24) d'une même armature, afin d'en faciliter la mise en place. Dans ce cas, lorsque le caisson est totalement replié, on assure la solidarisation des deux volets (5, 6) par l'intermédiaire d'un long ruban adhésif (28) qui peut avantageusement se prolonger au niveau de l'extrémité (14) du caisson, et plus loin encore, au niveau de la fente située le plus près de l'extrémité du caisson, comme illustré à la figure 9. Cela évite à la fente (25) en question de s'ouvrir sous l'effet de l'élasticité des pieds (29) réalisés au niveau des extrémités du caisson.According to another characteristic of the invention, the main phase which comprises the openings (23, 24) intended to receive the metal reinforcements, may have slots (25) connecting the openings (23, 24) of the same frame, to facilitate its implementation. In this case, when the box is totally folded, the two shutters (5, 6) are secured by means of a long adhesive tape (28) which can advantageously extend to the level of the end (14) of the box, and further still, at the slot located the most near the end of the box, as shown in Figure 9. This avoids the slot (25) in question to open under the effect of the elasticity of the feet (29) made in level of the ends of the box.

    Bien entendu, la structure du caisson conforme à l'invention peut s'adapter à de nombreux types d'armatures, et notamment aux armatures en U (30) comportant deux bras (31) traversant la face principale (2) du caisson, mais également les armatures monobras. Dans ce cas, les trous de passage des armatures sont répartis également de façon régulière, et disposés de part et d'autre du plan de symétrie central du caisson.Of course, the structure of the box according to the invention can be adapted to numerous types of reinforcement, and in particular U-shaped frames (30) comprising two arms (31) passing through the main face (2) of the box, but also the single-sided armatures. In this case, the passage holes of the reinforcements are distributed also on a regular basis, and arranged on both sides of the plane of symmetry central of the box.

    En fonction des contraintes de rigidité souhaitées, il est possible de faire varier la forme des éléments additionnels comme illustré par exemple à la figure 3, dans ce cas de figure, les éléments additionnels se présentent sous la forme d'une bande comportant deux pliures (55, 56) définissant trois segments (57, 58, 59). Le premier segment (57) vient au regard de la face latérale (3). Le second segment (58) vient au regard du rabat (5) formant la moitié de la face principale (12). Le troisième segment (59) vient au contact du volet (7) formant une partie de l'entretoise. Dans ce cas, la rigidité de la boíte est encore améliorée puisque les premier et troisième segments (57, 59) assurent une rigidification de la boíte dans un sens perpendiculaire à la face principale (2), tandis que le second segment (58) assure la rigidification de la boíte d'attente vis à vis des efforts exercés perpendiculairement aux faces latérales (3, 4). L'orientation des alvéoles de l'élément additionnel (54) peut être choisie soit perpendiculaire à l'orientation des alvéoles du reste du caisson, pour augmenter fortement la rigidité de l'ensemble, ou bien encore parallèle à l'orientation des alvéoles du reste du caisson pour faciliter la réalisation des plis (55, 56). Dans le cas où les différents segments (57, 58, 59) sont réalisés indépendamment, ils peuvent être chacun soudés ou collés sur les faces correspondantes du caisson, éventuellement avec une orientation distincte de leurs alvéoles. Pour des raisons de symétrie, deux éléments (54) identiques sont mis en place dans un même caisson. Depending on the desired rigidity constraints, it is possible to vary the shape of the additional elements as illustrated for example in Figure 3, in this case, the additional elements are in the form of a band comprising two folds (55, 56) defining three segments (57, 58, 59). The first segment (57) comes opposite the side face (3). The second segment (58) comes opposite the flap (5) forming half of the main face (12). The third segment (59) comes into contact with the flap (7) forming a part of the spacer. In this case, the rigidity of the box is further improved since the first and third segments (57, 59) provide a stiffening of the box in a direction perpendicular to the main face (2), while the second segment (58) ensures the stiffening of the waiting box with respect to the forces exerted perpendicular to the lateral faces (3, 4). The orientation of the alveoli of the additional element (54) can be chosen either perpendicular to the orientation of the cells of the rest of the box, to greatly increase the rigidity of the assembly, or still parallel to the orientation of the cells of the rest of the box to facilitate the realization of the folds (55, 56). In the case where the different segments (57, 58, 59) are made independently, they can each be welded or glued on the faces cores, possibly with a separate orientation of their alveoli. For reasons of symmetry, two identical elements (54) are set place in the same box.

    Les figures 4 à 6 illustrent une variante de réalisation dans lequel l'élément additionnel (60) s'étend sur l'intégralité de la surface interne du caisson. Plus précisément, l'élément additionnel (60) comprend un premier segment (64) qui vient au regard de la face principale (2) du reste du caisson. Ce segment (54) présente des ouvertures de passage des armatures, situées aux mêmes endroits que celles ménagées sur la face principale (2). L'élément additionnel (60) comprend également deux segments latéraux (63, 65) venant respectivement au regard des faces latérales (3, 4) du reste du caisson. L'élément (60) comprend également deux segments (62, 66) venant au contact des rabats (6, 5) formant la face principale (12). Enfin, l'élément additionnel (60) peut également comprendre deux segments (61, 67) venant au contact des volets (7, 8) formant l'entretoise. Dans ce cas, la mise en place du cavalier (22) maintient le contact entre les segments (61, 67) de l'élément additionnel et les volets (7, 8) du reste du caisson.Figures 4 to 6 illustrate an alternative embodiment in which the element additional (60) extends over the entire inner surface of the box. More specifically, the additional element (60) comprises a first segment (64) which comes in front of the main face (2) of the rest of the box. This segment (54) has openings for the passage of reinforcements, located in the same places as those formed on the main face (2). The additional element (60) comprises two lateral segments (63, 65) coming respectively with respect to side faces (3, 4) of the rest of the box. The element (60) also includes two segments (62, 66) engaging the flaps (6, 5) forming the main face (12). Finally, the additional element (60) can also comprise two segments (61, 67) coming into contact with the flaps (7, 8) forming the spacer. In this case placement of the jumper (22) maintains contact between the segments (61, 67) of the additional element and the shutters (7, 8) of the rest of the box.

    De la sorte, on obtient une structure interne sensiblement analogue à celle du caisson externe, ce qui augmente très fortement la rigidité du caisson, et ce d'autant plus que les alvéoles peuvent être choisies en étant orientées perpendiculairement à la grande direction du caisson.In this way, an internal structure substantially similar to that of the external box, which greatly increases the rigidity of the box, and all this more than the cells can be chosen by being oriented perpendicular to the big direction of the box.

    Néanmoins, la résistance de l'ensemble reste satisfaisant en utilisant un élément additionnel qui comporte des alvéoles parallèles à la direction principale du caisson, ce qui a également pour avantage de faciliter le pliage d'un tel élément additionnel (60). Grâce à cette structure particulière, il est possible de diminuer fortement l'épaisseur du polypropylène alvéolaire utilisé et donc son prix de revient tout en conservant une résistance à l'écrasement particulièrement élevée.Nevertheless, the resistance of the whole remains satisfactory by using a additional element which has cells parallel to the main direction of the box, which also has the advantage of facilitating the folding of such an element additional (60). Thanks to this particular structure, it is possible to decrease strongly the thickness of the cellular polypropylene used and therefore its cost price while maintaining a particularly high crush strength.

    En fonction des applications et de la dimension, et notamment de la largeur de la boíte d'attente, une autre géométrie peut être adoptée telle qu'illustrée aux figures 7 et 8, dans lesquelles les volets (35, 36) adjacents aux faces latérales (33, 34) présentent une largeur inférieure à la moitié de la face principale (32).Depending on the application and size, especially the width of the waiting box, another geometry can be adopted as illustrated in the FIGS. 7 and 8, in which the flaps (35, 36) adjacent to the lateral faces (33, 34) have a width less than half of the main face (32).

    Dans ce cas, la surface restante est occupée par une goulotte additionnelle (40) mise en place comme illustrée à la figure 7, de manière à constituer deux éléments de renforcement (41, 42) formant entretoise, et augmentant donc ainsi la rigidité et la résistance à la pression du béton pendant le coulage. In this case, the remaining surface is occupied by an additional chute (40) set up as illustrated in Figure 7, so as to constitute two reinforcing elements (41, 42) forming a spacer, and thus increasing the stiffness and compressive strength of the concrete during casting.

    Dans ce cas, et comme illustré à la figure 8, le caisson peut comporter trois éléments additionnels (72, 73, 74). Les éléments additionnels (72, 74) sont mis en place respectivement entre les faces latérales (33) et (34), et les volets formant partie de l'élément entretoise (41, 42). L'élément (73) est quant à lui mis en place à l'intérieur de la goulotte supplémentaire (40), et ses segments latéraux (75, 76) font partie des éléments entretoises (41, 42). On conçoit que la rigidité d'une telle boíte d'attente est particulièrement importante.In this case, and as illustrated in FIG. 8, the box may comprise three additional elements (72, 73, 74). The additional elements (72, 74) are place respectively between the lateral faces (33) and (34), and the shutters forming part of the spacer element (41, 42). Element (73) is put in place at the interior of the additional trough (40), and its lateral segments (75, 76) part of the spacer elements (41, 42). It is conceivable that the rigidity of such a box waiting is particularly important.

    Comme déjà dit, l'orientation des alvéoles des faces internes (33, 34) et des éléments de renforcement (41, 42) peut être choisie pour assurer une résistance optimale à l'écrasement. Dans ce cas, les volets (46) à l'extrémité du caisson sont chacun équipés de trois pattes (37, 38, 39) séparées par des fentes (44, 45) correspondant aux emplacements des éléments de renforcement (41, 42) formant entretoise (voir figure 7).As already stated, the orientation of the cells of the internal faces (33, 34) and the reinforcing elements (41, 42) can be chosen to provide resistance optimal for crushing. In this case, the flaps (46) at the end of the box are each equipped with three legs (37, 38, 39) separated by slots (44, 45) corresponding to the locations of the reinforcing elements (41, 42) forming spacer (see Figure 7).

    Comme on le voit, la géométrie de l'invention peut être déclinée en fonction des dimensions souhaitées de la boíte d'attente. Ainsi, en pratique, il est possible de réaliser des caissons présentant de un à cinq centimètres d'épaisseur, et de largeur comprise entre cinq et vingt cinq centimètres. Le pas entre les ouvertures (23, 24) de réception des armatures peut être choisi en fonction des contraintes de normalisation propre à la construction.As can be seen, the geometry of the invention can be broken down according to desired dimensions of the waiting box. So, in practice, it is possible to make boxes that are one to five centimeters thick and wide between five and twenty five centimeters. The pitch between the openings (23, 24) reception of reinforcements can be chosen according to the constraints of standardization specific to construction.

    Préférentiellement, les boítes d'attente conformes à l'invention présenteront une longueur de l'ordre de un mètre, à comparer avec des boítes d'attente classiques qui présentent une longueur correspondante à une hauteur de mur standard, soit sensiblement 2,40 m à 2,50 m. Ainsi, lors de la mise en place des boítes d'attente conformes à l'invention, deux éléments seront nécessaires pour couvrir un espace de 2,40 mètres. L'espace entre les deux boítes d'attente ainsi que les volumes situés aux extrémités des boítes d'attente étant destiné à recevoir le béton lors du coulage. Cette originalité reste conforme vis à vis des règles de la construction en béton armé. Preferably, the waiting boxes according to the invention will show a length of the order of one meter, compared with conventional waiting boxes which have a length corresponding to a standard wall height, substantially 2.40 m to 2.50 m. Thus, when setting up waiting boxes according to the invention, two elements will be necessary to cover a space of 2.40 meters. The space between the two waiting boxes as well as the volumes located at the ends of the waiting boxes being intended to receive the concrete during casting. This originality remains consistent with the rules of concrete construction armed.

    Comme on le voit aux figures 10 à 12, l'opération d'extraction de la boíte après les coffrages s'effectue comme suit. Lorsque le coffrage sur lequel était disposé les boítes d'attente, a été enlevé, la face principale du caisson est affleurante. Il suffit de découper le ruban adhésif (28) solidarisée dans les deux volets (5, 6) formant la face principale (12) pour déplier et écarter les deux volets (5, 6), et faire apparaítre les armatures de liaison.As can be seen in FIGS. 10 to 12, the extraction operation of the box after the formwork is carried out as follows. When the formwork on which was placed the waiting boxes, was removed, the main face of the box is flush. Simply cut the adhesive tape (28) secured in both shutters (5, 6) forming the main face (12) to unfold and spread the two shutters (5, 6), and show the binding frames.

    Après avoir découpé à l'aide d'un outil tranchant la face principale (2) au niveau du front de la réservation, il en exerce une action sur les volets (5, 6) pour extraire le caisson.After cutting with a sharp tool the main face (2) level of the front of the reservation, it exerts an action on the shutters (5, 6) for extract the box.

    L'élimination de la boíte d'attente est extrêmement facilitée et ce d'autant plus que le contact entre le polypropylène et le béton n'est le siège d'aucune réaction chimique, et donc d'adhérence parasite, même après quelques mois.The elimination of the waiting box is extremely facilitated and all the more that contact between polypropylene and concrete is not the seat of any reaction chemical, and therefore parasitic adhesion, even after a few months.

    Il ressort de ce qui précède que la boíte d'attente conforme à l'invention présente de multiples avantages et notamment :

    • une grande facilité de fabrication par une technique simple de pliage,
    • une grande rigidité permettant le transport et le stockage de telles boítes d'attente,
    • une grande résistance à l'écrasement grâce notamment à la présence d'éléments de renforcement, d'éléments additionnels, et au choix des orientations relatives des alvéoles de ces différents éléments,
    • une totale inertie chimique vis à vis du béton et donc une possibilité de conserver le coffrage en place pendant de nombreuses semaines, voire des mois,
    • un poids extrêmement faible,
    • un faible prix de revient.
    It follows from the foregoing that the waiting box according to the invention has multiple advantages and in particular:
    • a great ease of manufacture by a simple technique of folding,
    • high rigidity for transporting and storing such waiting boxes,
    • a high resistance to crushing thanks in particular to the presence of reinforcing elements, additional elements, and the choice of the relative orientations of the cells of these different elements,
    • a total chemical inertness with respect to the concrete and thus a possibility of keeping the formwork in place for many weeks, or even months,
    • extremely low weight,
    • a low cost price.

    Claims (10)

    1. Preparatory box caisson made of polypropylene for installing linking braces between two parts of a concrete structure, made by bending a sheet (1) of pliable material, and comprising:
      two main parallel faces (2, 12), one of which is pierced with openings (23, 24) for the linking braces to pass through;
      two side faces (3, 4) connecting the main faces (2, 12);
      characterized in that:
      the material used to produce the caisson is honeycomb polypropylene whose cells, at least at the main faces (2, 12) and side faces (3, 4), are parallel to the largest direction of the caisson;
      it comprises additional elements (50, 51) also made of honeycomb polypropylene, at least opposite the side faces (3, 4).
    2. Caisson according to Claim 1, characterized in that one of the main faces (12) is produced by two rebates (5, 6) of the sheet adjacent to the side faces (3, 4).
    3. Caisson according to Claim 2, characterized in that at least one of the two rebates is extended by a flap (7, 8) which is folded inside the caisson to form a reinforcement element (13) substantially parallel to a side face (3, 4).
    4. Caisson according to Claim 1, characterized in that the cells of the additional elements (50, 51) are parallel to those of the caisson.
    5. Caisson according to Claim 1, characterized in that the cells of the additional elements (50, 51) are perpendicular to those of the caisson.
    6. Caisson according to Claim 1, characterized in that the additional elements (50, 51) come only opposite the side faces (3, 4).
    7. Caisson according to Claim 2, characterized in that the additional elements (54) also come opposite the rebates (5, 6) forming one of the main faces (12).
    8. Caisson according to Claim 3, characterized in that the additional elements (54) also come opposite the reinforcement element (13).
    9. Caisson according to Claim 8, characterized in that the additional elements (60) are connected to one another via a common face (64) situated opposite the main face pierced with openings.
    10. Preparatory box including a caisson according to one of Claims 1 to 9.
    EP00420133A 1999-07-08 2000-06-22 Casing for reinforcement connection box and reinforcement connection box with such casing Expired - Lifetime EP1067254B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    FR9909046A FR2796095B1 (en) 1999-07-08 1999-07-08 WAITING BOX BOX AND WAITING BOX INCLUDING SUCH A BOX
    FR9909046 1999-07-08

    Publications (2)

    Publication Number Publication Date
    EP1067254A1 EP1067254A1 (en) 2001-01-10
    EP1067254B1 true EP1067254B1 (en) 2005-08-10

    Family

    ID=9548028

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP00420133A Expired - Lifetime EP1067254B1 (en) 1999-07-08 2000-06-22 Casing for reinforcement connection box and reinforcement connection box with such casing

    Country Status (5)

    Country Link
    EP (1) EP1067254B1 (en)
    AT (1) ATE301752T1 (en)
    DE (1) DE60021803T2 (en)
    ES (1) ES2243220T3 (en)
    FR (1) FR2796095B1 (en)

    Cited By (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    AU2009238356B2 (en) * 2008-11-21 2016-08-18 Illinois Tool Works Inc. A Box for Form Work

    Families Citing this family (8)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    FR2825108B1 (en) * 2001-05-23 2003-11-07 Cogito WAITING BOX CASE
    DE10228083A1 (en) * 2002-06-18 2004-01-08 Gebr. Philipp Gmbh sealing plug
    DE10228082B4 (en) * 2002-06-18 2017-08-31 Gebr. Philipp Gmbh storage box
    FR2916782B3 (en) * 2007-05-30 2009-04-10 Fimurex Sa BOX OF PENDING BOX AND WAITING BOX INCORPORATING SUCH A BOX
    FR2980808B1 (en) * 2011-10-04 2013-10-04 Herve Auney PLASTIC MONOBLOCK HOLDING UNIT AND DEVICE OBTAINED WITH SUCH A HOUSING
    FR3017147B1 (en) * 2014-02-03 2016-02-05 Fimurex BOX FOR WAITING BOX AND WAITING BOX PROVIDED WITH SUCH A CAISSON
    FR3073877B1 (en) * 2017-11-20 2020-10-30 Fimurex METAL BONDING REINFORCEMENT HOLDING BOX
    FR3086311B1 (en) 2018-09-25 2021-01-29 Plaka Group France BOX FOR PENDING CONNECTION FRAMES AND METHOD OF ASSEMBLING THE LINKING FRAMES IN THE SAID WAITING BOX

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    Publication number Priority date Publication date Assignee Title
    US4685267A (en) * 1983-08-01 1987-08-11 Deslauriers, Inc. Box void
    DE3404837C2 (en) 1984-02-10 1986-09-25 Rolf Dipl.-Ing. Innsbruck Blasy Device for storing reinforcing steel
    FR2575506B1 (en) 1985-01-03 1988-08-19 Mure Ets BOX FOR THE HOLDING OF LINK REINFORCEMENTS BETWEEN TWO CONCRETE STRUCTURES
    GB8616302D0 (en) 1986-07-03 1986-08-13 Furr D Wall tie device
    US4984401A (en) * 1989-07-31 1991-01-15 Dayton Superior Corporation Device and method for housing a steel reinforcement in an area where joints are made between first and subsequently poured concrete structures
    FR2694954B1 (en) * 1992-08-18 1994-11-04 Mure Ets Box for placing connection reinforcements between two parts of contiguous concrete work and poured one after the other.
    US5782049A (en) * 1996-12-11 1998-07-21 Surevoid Products, Inc. Two-part collapsible corrugated paper form void

    Cited By (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    AU2009238356B2 (en) * 2008-11-21 2016-08-18 Illinois Tool Works Inc. A Box for Form Work
    AU2009238356C1 (en) * 2008-11-21 2017-01-19 Illinois Tool Works Inc. A Box for Form Work

    Also Published As

    Publication number Publication date
    FR2796095B1 (en) 2001-09-07
    ATE301752T1 (en) 2005-08-15
    DE60021803T2 (en) 2006-03-16
    ES2243220T3 (en) 2005-12-01
    DE60021803D1 (en) 2005-09-15
    EP1067254A1 (en) 2001-01-10
    FR2796095A1 (en) 2001-01-12

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