EP0383870B1 - Anchorage piece, in particular for concrete - Google Patents

Anchorage piece, in particular for concrete Download PDF

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Publication number
EP0383870B1
EP0383870B1 EP89908195A EP89908195A EP0383870B1 EP 0383870 B1 EP0383870 B1 EP 0383870B1 EP 89908195 A EP89908195 A EP 89908195A EP 89908195 A EP89908195 A EP 89908195A EP 0383870 B1 EP0383870 B1 EP 0383870B1
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EP
European Patent Office
Prior art keywords
base
anchoring piece
strip
piece according
shank
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EP89908195A
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German (de)
French (fr)
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EP0383870A1 (en
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Marcel Arteon
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Individual
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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
    • E04G21/14—Conveying or assembling building elements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/14—Conveying or assembling building elements
    • E04G21/142—Means in or on the elements for connecting same to handling apparatus

Definitions

  • the present invention relates to an anchor for hardenable material and in particular for concrete, intended to be included in part in the concrete element, the other part remaining exterior to allow handling of the element. It relates in particular, but not exclusively, to an anchoring piece intended to be introduced into thin panels such as those found in prefabricated constructions.
  • the problem which is solved by the present invention is that of obtaining a point making it possible to exert tensile forces (lifting forces for example) on an element obtained by casting a material capable of hardening (concrete, plaster, etc.).
  • tensile forces lifting forces for example
  • an element obtained by casting a material capable of hardening concrete, plaster, etc.
  • several solutions have already been proposed, using a rod, or elongated element, having at its upper part a gripping means and, at its lower part, means for anchor.
  • a known type of anchor is shown in FIG. 1. It comprises a head A, a rod B, and a foot C whose diameter is greater than that of the rod.
  • This insert makes the element work in compression, that is to say that it transfers the tensile force to the foot of the anchor which determines a tearing cone.
  • an eye anchor such as that which is represented, in front view, in FIG. 2, which also has a head A, a rod B and a foot D having an opening E for the passage of a frame.
  • Such an anchor makes it possible to obtain a connection between the head A and a reinforcement or reinforcing iron, passing through the eye E. The transfer of the tensile force to the mass of the panel then results from the adhesion of the reinforcements inside the panel.
  • anchors are also used, and in particular the so-called “carp tail” anchors, the rod of which is terminated at its base by the “carp tail”, present at its upper end, a hole for example allowing the introduction of a lifting hook, or a threaded rod or threaded tube.
  • the carp tail forms a sealing tab inside the material.
  • all known anchoring means have drawbacks or limits in use, in particular in the case of thin panels.
  • the tear-off cone cannot form properly and there are sometimes bursts F, or at least cracks at the height of the connection if the he thickness of the element is small.
  • EP-A-0 259 295 describes an anchor in which an eye is provided in the head of the anchor. To facilitate the passage of a curved reinforcement, the lower internal surface of the hole is slightly curved. But the frame does not bear in the bottom of said orifice.
  • FR-A-2 072 873 relates to a plastic bushing for example, intended to receive a metal stud and reinforcing bars penetrating inside recesses formed in the body of the bushing. But there is no direct connection between the stud and the reinforcement bars. In addition, the socket occupies a larger volume which is not filled with concrete, which poses problems for thin panels. And it can only be used with frames.
  • US-A-4,014,151 describes a one-piece forged anchor in which a reinforcement or reinforcing iron passes through a hole drilled in the foot. But this anchor, if it provides support for the iron, does not allow it to be guided. However, a good mechanical connection is necessary to avoid the deformation of the iron and the bursting of concrete.
  • the object of the present invention is to overcome the above drawbacks and to propose an anchor of a universal nature allowing work, either by compression alone, or by compression and adhesion, and the length of which can be reduced compared to traditional anchors.
  • the anchoring piece for curable material including at least one curved reinforcing iron and a one-piece implant comprising a part remaining outside the material, intended for gripping, a rod having an axis of symmetry and a foot of dimensions higher than the rod
  • the foot comprises at least one cylindrical support and guide ramp, hollowed out in its upper face, to receive the reinforcing iron, the radius of curvature of the ramp being equal to the radius of curvature reinforcing iron.
  • the frame is held in position by the edges of the ramp and cannot slide during molding.
  • the section of the ramps is circular and the diameter of the grooves is substantially equal to the diameter of the reinforcement bars so that the range of the bars inside the ramps is optimal.
  • the base of the rod is pierced with at least one eye extending in a direction substantially perpendicular to the axis of the rod, the upper surface of the foot forming a curved support ramp , in line with the opening of the eye.
  • the ramp (or the ramps) is eccentric relative to the axis of the rod. It is thus possible to bring together on one anchor foot two or more reinforcing bars.
  • An anchor according to the invention can be used, either without reinforcing iron, the material of the element working under compression, or with reinforcing iron resting inside the ramp, which ensures suitable mechanical transmission. forces applied to the anchor, for example during handling.
  • FIG. 7 shows a view from above of the device represented in FIG. 5, and it can be seen that the iron 4 is perfectly guided by the ramp 5.
  • FIG. 6 passing two or more reinforcing irons through the foot 3 of the anchor 4.
  • the eyes 2 are then formed in the foot 3.
  • the diameter of the reinforcements can be reduced, which leads to a significant reduction in the radius of curvature thereof and facilitates the production of the support ramps.
  • the head 7 of the anchor is extended downwards by a short rod 1, ending in a foot 3 provided with two openings 2, the support ramps being able, in this case, to be inclined.
  • the implant according to the invention can be either full, and obtained by molding, forging or machining, or hollow and essentially constituted by a tube as shown in Figures 8 and 9.
  • the upper end of the rod 1 can present for example a threaded hole 8
  • the foot of the anchor 3 is constituted by a development 9 of the tube which, as before, supports the armature 4 over a sufficient part of its length, this armature 4 passing, as previously , by the eye 2.
  • the curvature of the opening 9 is such that it corresponds exactly to the curvature of the iron 4 in order to maintain it perfectly when a traction is applied to the bush 1.
  • Figures 10 and 11 show respectively, in front view and in side view, the anchoring in a thin panel.
  • an anchor such as that shown in Figure 6 allowing the passage of two frames 4a and 4b extending in two parallel vertical planes.
  • the head 7 projects inside a reservation 10 provided in the panel 11.
  • the frames 4a and 4b can always extend in two parallel planes, at different angles, the two support ramps 5 having identical or different curvatures. A better distribution of the reinforcing bars is thus obtained inside the panel, which increases safety.
  • Figures 12, 13 and 14 show another embodiment of an anchor foot 3, in which the ramps 5 offset from the rod 1 can be straight or inclined as required. That is to say that the planes containing the axes X of the ramps are either parallel to the axis of the anchor, or inclined with respect to this axis.
  • an implant with two reinforcing bars these can be fixed in the implant by crimping for example, which gives a rigid assembly, easy to arrange, before the casting of the component of the panel.
  • the implant with several passage ramps makes it possible to diffuse the forces of the element, which is advantageous, especially if the resistance is very low, for example when the concrete has not yet taken its resistance at final compression.
  • a very short implant with several reinforcing bars created for handling very thin slabs can also be used on the edge of the elements for lifting and vertical handling.
  • the support ramps 5 can be, in one or two pieces, added to the implant by crimping, welding or even produced by deformation of the piece.
  • the anchoring parts according to the invention can be obtained by known manufacturing methods and they can be either in one piece, or include elements added by welding or brazing, and, in particular, the foot provided with its ramps can be attached to a forged rod.
  • the conical shape of the foot particularly when the latter is hollowed out since the material then enters the recess, makes it possible to counterbalance the lateral forces which can be applied by a machine, when lifting a panel.
  • a welded connection for example, between the implant and the reinforcing iron can eliminate any articulation, which limits cracks during lifting.

Abstract

An anchorage piece for material which sets, such as concrete or plaster, comprises a gripping shank and a foot whose cross-section is greater than that of the shank. The foot (3) comprises at leaast one support ramp (5) hollowed out in its upper section which holds a reinforcement or reinforcing iron (4) so as to unite the assembly consisting of the anchorage piece and reinforcement in a single piece.

Description

La présente invention a pour objet une pièce d'ancrage pour matériau durcissable et notamment pour béton, destinée à être incluse en partie dans l'élément en béton, l'autre partie restant extérieure pour permettre la manutention de l'élément. Elle vise en particulier, mais non exclusivement, une pièce d'ancrage destinée à être introduite dans des panneaux de faible épaisseur tels que ceux que l'on trouve dans les constructions préfabriquées.The present invention relates to an anchor for hardenable material and in particular for concrete, intended to be included in part in the concrete element, the other part remaining exterior to allow handling of the element. It relates in particular, but not exclusively, to an anchoring piece intended to be introduced into thin panels such as those found in prefabricated constructions.

Le problème qui est résolu par la présente invention est celui de l'obtention d'un point permettant d'exercer des efforts de traction (efforts de levage par exemple) sur un élément obtenu par coulée d'un matériau capable de durcir (béton, plâtre, etc..). Afin de reporter les forces de traction sur ce point d'ancrage, plusieurs solutions ont déjà été proposées, faisant appel à une tige, ou élément longiligne, présentant à sa partie supérieure un moyen de préhension et, à sa partie inférieure, des moyens d'ancrage. Une ancre de type connu est représentée sur la figure 1. Elle comporte une tête A, une tige B, et un pied C dont le diamètre est supérieur à celui de la tige. Cet insert fait travailler l'élément en compression, c'est-à-dire qu'il reporte l'effort de traction sur le pied de l'ancre qui détermine un cône d'arrachement. Une autre solution connue est une ancre à oeil telle que celle qui est représentée, en vue de face, sur la figure 2, qui présente également une tête A, une tige B et un pied D présentant une ouverture E pour le passage d'une armature. Une telle ancre permet d'obtenir une solidarisation entre la tête A et une armature ou fer de renfort, passant à travers l'oeil E. Le report de l'effort de traction sur la masse du panneau résulte alors de l'adhérence des armatures à l'intérieur du panneau.The problem which is solved by the present invention is that of obtaining a point making it possible to exert tensile forces (lifting forces for example) on an element obtained by casting a material capable of hardening (concrete, plaster, etc.). In order to transfer the tensile forces to this anchoring point, several solutions have already been proposed, using a rod, or elongated element, having at its upper part a gripping means and, at its lower part, means for anchor. A known type of anchor is shown in FIG. 1. It comprises a head A, a rod B, and a foot C whose diameter is greater than that of the rod. This insert makes the element work in compression, that is to say that it transfers the tensile force to the foot of the anchor which determines a tearing cone. Another known solution is an eye anchor such as that which is represented, in front view, in FIG. 2, which also has a head A, a rod B and a foot D having an opening E for the passage of a frame. Such an anchor makes it possible to obtain a connection between the head A and a reinforcement or reinforcing iron, passing through the eye E. The transfer of the tensile force to the mass of the panel then results from the adhesion of the reinforcements inside the panel.

D'autres ancres sont également utilisées, et notamment les ancres dites "à queue de carpe", dont la tige est terminée à sa base par la "queue de carpe", présente à son extrémité supérieure, un trou par exemple permettant l'introduction d'un crochet de levage, ou encore une tige filetée ou un tube taraudé. La queue de carpe constitue une patte de scellement à l'intérieur du matériau. Mais, tous les moyens d'ancrage connus présentent des inconvénients ou des limites d'emploi, notamment dans le cas de panneaux de faible épaisseur.Other anchors are also used, and in particular the so-called "carp tail" anchors, the rod of which is terminated at its base by the "carp tail", present at its upper end, a hole for example allowing the introduction of a lifting hook, or a threaded rod or threaded tube. The carp tail forms a sealing tab inside the material. However, all known anchoring means have drawbacks or limits in use, in particular in the case of thin panels.

Dans le cas du fonctionnement par compression, comme représenté sur la figure 3, le cône d'arrachement ne peut pas se former convenablement et l'on note quelquefois des éclatements F, ou pour le moins des fissurations à la hauteur de la liaison si l'épaisseur de l'élément est faible.In the case of compression operation, as shown in FIG. 3, the tear-off cone cannot form properly and there are sometimes bursts F, or at least cracks at the height of the connection if the he thickness of the element is small.

Dans le cas de l'utilisation d'une ancre à oeil, représenté sur la figure 4, le fer G de renfort se déforme et s'écrase, lors de l'effort de levage avec modification de sa courbure provoquant son écrouissage et éventuellement sa rupture.In the case of the use of an eye anchor, represented in FIG. 4, the reinforcing iron G deforms and is crushed, during the lifting force with modification of its curvature causing its hardening and possibly its rupture.

EP-A-0 259 295 décrit une ancre dans laquelle un oeil est prévu dans la tête de l'ancre. Pour faciliter le passage d'une armature courbe, la surface interne inférieure du trou est légérement incurvée. Mais l'armature ne porte pas dans le fond dudit orifice.EP-A-0 259 295 describes an anchor in which an eye is provided in the head of the anchor. To facilitate the passage of a curved reinforcement, the lower internal surface of the hole is slightly curved. But the frame does not bear in the bottom of said orifice.

FR-A-2 072 873 se rapporte à une douille en matière plastique par exemple, destinée à recevoir un goujon métallique et des fers de renfort pénétrant à l'intérieur d'évidements formés dans le corps de la douille. Mais il n'existe pas de liaison directe entre le goujon et les fers de renfort. De plus, la douille occupe un volume plus important qui n'est pas rempli de béton ce qui pose des problèmes pour les panneaux minces. Et elle ne peut être utilisée qu'avec des armatures.FR-A-2 072 873 relates to a plastic bushing for example, intended to receive a metal stud and reinforcing bars penetrating inside recesses formed in the body of the bushing. But there is no direct connection between the stud and the reinforcement bars. In addition, the socket occupies a larger volume which is not filled with concrete, which poses problems for thin panels. And it can only be used with frames.

US-A- 4 014 151 décrit une ancre forgée monobloc dans laquelle une armature ou fer de renfort passe à travers un trou percé dans le pied. Mais cette ancre, si elle assure un soutien du fer ne permet pas un guidage de celui-ci. Or, une bonne liaison mécanique est nécessaire pour éviter la déformation du fer et les éclatements de béton.US-A-4,014,151 describes a one-piece forged anchor in which a reinforcement or reinforcing iron passes through a hole drilled in the foot. But this anchor, if it provides support for the iron, does not allow it to be guided. However, a good mechanical connection is necessary to avoid the deformation of the iron and the bursting of concrete.

La présente invention a pour objet de pallier les inconvénients ci-dessus et de proposer une ancre à caractère universel permettant un travail, soit par compression seule, soit par compression et adhérence, et dont la longueur peut être réduite par rapport aux ancres traditionnelles.The object of the present invention is to overcome the above drawbacks and to propose an anchor of a universal nature allowing work, either by compression alone, or by compression and adhesion, and the length of which can be reduced compared to traditional anchors.

Selon la présente invention, la pièce d'ancrage pour matériau durcissable incluant au moins un fer de renfort courbé et un implant monobloc comprenant une partie restant extérieure au matériau, prévue pour la préhension, une tige présentant un axe de symétrie et un pied de dimensions supérieures à la tige est caractérisée en ce que le pied comporte au moins une rampe cylindrique d'appui et de guidage, creusée dans sa face supérieure, pour recevoir le fer de renfort, le rayon de courbure de la rampe étant égal au rayon de courbure du fer de renfort.According to the present invention, the anchoring piece for curable material including at least one curved reinforcing iron and a one-piece implant comprising a part remaining outside the material, intended for gripping, a rod having an axis of symmetry and a foot of dimensions higher than the rod is characterized in that the foot comprises at least one cylindrical support and guide ramp, hollowed out in its upper face, to receive the reinforcing iron, the radius of curvature of the ramp being equal to the radius of curvature reinforcing iron.

Ainsi, l'armature est maintenue en position par les bords de la rampe et ne peut pas glisser au cours du moulage. La section des rampes est circulaire et, le diamètre des rainures est sensiblement égal au diamètre des fers de renforts pour que la portée des fers à l'intérieur des rampes soit optimale.Thus, the frame is held in position by the edges of the ramp and cannot slide during molding. The section of the ramps is circular and the diameter of the grooves is substantially equal to the diameter of the reinforcement bars so that the range of the bars inside the ramps is optimal.

Selon une autre caractéristique de l'invention, la base de la tige est percée d'au moins un oeil s'étendant dans une direction sensiblement perpendiculaire à l'axe de la tige, la surface supérieure du pied formant une rampe d'appui courbe, dans le prolongement de l'ouverture de l'oeil.According to another characteristic of the invention, the base of the rod is pierced with at least one eye extending in a direction substantially perpendicular to the axis of the rod, the upper surface of the foot forming a curved support ramp , in line with the opening of the eye.

Dans un autre mode de réalisation, la rampe (ou les rampes) est excentrée par rapport à l'axe de la tige. Il est ainsi possible de réunir sur un pied d'ancre deux ou plusieurs fers de renfort.In another embodiment, the ramp (or the ramps) is eccentric relative to the axis of the rod. It is thus possible to bring together on one anchor foot two or more reinforcing bars.

Une ancre selon l'invention peut être utilisée, soit sans fer de renfort, le matériau de l'élément travaillant à la compression, soit avec fer de renfort s'appuyant à l'intérieur de la rampe, ce qui assure une transmission mécanique convenable des efforts appliqués sur la pièce d'ancrage, par exemple lors des manutentions.An anchor according to the invention can be used, either without reinforcing iron, the material of the element working under compression, or with reinforcing iron resting inside the ramp, which ensures suitable mechanical transmission. forces applied to the anchor, for example during handling.

Il n'y a aucune déformation ni détérioration du fer de renfort, ni déplacement de l'implant par rapport au fer de renfort, ce qui évite les fissurations au niveau de la liaison.There is no deformation or deterioration of the reinforcing iron, nor displacement of the implant relative to the reinforcing iron, which avoids cracks at the level of the connection.

D'autres caractéristiques et avantages de l'invention apparaîtront au cours de la description qui va suivre de modes particuliers de réalisation, donnés uniquement à titre d'exemples non limitatifs, en regard des dessins qui représentent :

  • les figures 1 à 4, des schémas montrant des ancres de la technique antérieure et leurs inconvénients ;
  • la figure 5, une vue en coupe de la partie inférieure d'une ancre selon l'invention ;
  • la figure 6, une vue en coupe verticale d'un second mode de réalisation, solidarisée avec deux armatures permettant son implantation ;
  • La figure 7, une vue par-dessus correspondant au mode de réalisation de la figure 5 ;
  • les figures 8 et 9, des vues respectivement de face et de côté, d'un autre mode de réalisation ;
  • les figures 10 et 11, des vues de face et de profil d'une ancre avec fixation de deux armatures d'angles de courbure différents ;
  • les figures 12 à 14, des vues de face et en coupe verticale et, en vue par-dessus d'un pied d'ancre à deux rampes selon une variante de l'invention ;
Sur la figure 5, on distingue l'extrémité inférieure de l'implant 1 qui, dans l'exemple représenté, est constitué par une tige cylindrique percée d'un oeil 2 et terminée immédiatement au-dessous de l'oeil 2 par un pied 3. A l'intérieur de l'oeil passe un fer de renfort 4 qui s'insère, lors du montage, dans une gorge ou rampe d'appui 5 dans laquelle le fer est parfaitement guidé et maintenu. Le pied 3 peut être partiellement évidé comme représenté en 6. La tête d'ancre non représentée, peut être quelconque et permet la prise de l'ancre par un engin de levage approprié. On a ainsi remarqué que l'ancre selon la présente invention travaille simultanément lorsqu'une armature est passée à l'intérieur de l'oeil 2, par compression et par adhérence du béton, ou plus généralement du constituant de l'élément. Celà donne un ensemble homogène qui augmente la charge transportable pour un même encombrement de l'insert. La résistance résultante est supérieure à la somme de chacune des résistances (compression et adhérence) considérées séparément. La structure de la pièce supprime le jeu d'articulation existant précédemment dans les ancres à oeil, ce qui élimine les risques de fissuration. L'effort est réparti sur le fer de renfort 4 sur une certaine longeur et celui-ci ne travaille plus à la flexion ou au cisaillement, comme c'était le cas dans les ancres à oeil connues. Dans un panneau mince, cette réalisation évite la détérioration du panneau représentée sur la figure 3.Other characteristics and advantages of the invention will appear during the description which follows of particular embodiments, given solely by way of nonlimiting examples, with reference to the drawings which represent:
  • Figures 1 to 4, diagrams showing anchors of the prior art and their drawbacks;
  • Figure 5, a sectional view of the lower part of an anchor according to the invention;
  • Figure 6, a vertical sectional view of a second embodiment, secured with two frames allowing its implantation;
  • Figure 7, a top view corresponding to the embodiment of Figure 5;
  • Figures 8 and 9, respectively front and side views of another embodiment;
  • Figures 10 and 11, front and side views of an anchor with attachment of two frames of different angles of curvature;
  • Figures 12 to 14, front views and in vertical section and, in top view of an anchor foot with two ramps according to a variant of the invention;
In FIG. 5, a distinction is made between the lower end of the implant 1 which, in the example shown, consists of a cylindrical rod pierced with an eye 2 and terminated immediately below the eye 2 by a foot 3. Inside the eye passes a reinforcing iron 4 which is inserted, during assembly, in a groove or support ramp 5 in which the iron is perfectly guided and maintained. The foot 3 can be partially hollowed out as shown in 6. The anchor head not shown, can be any and allows the anchor to be taken up by a suitable lifting device. It has thus been noted that the anchor according to the present invention works simultaneously when a frame has passed inside the eye 2, by compression and by adhesion of the concrete, or more generally of the constituent of the element. It gives a homogeneous unit which increases the transportable load for the same size of the insert. The resulting resistance is greater than the sum of each of the resistances (compression and adhesion) considered separately. The structure of the part eliminates the articulation play existing previously in the eye anchors, which eliminates the risks of cracking. The force is distributed over the reinforcing iron 4 over a certain length and the latter no longer works on bending or shearing, as was the case in known eye anchors. In a thin panel, this embodiment avoids the deterioration of the panel shown in FIG. 3.

La figure 7 représente en vue par-dessus le dispositif représenté sur la figure 5, et l'on voit que le fer 4 est parfaitement guidé par la rampe 5.FIG. 7 shows a view from above of the device represented in FIG. 5, and it can be seen that the iron 4 is perfectly guided by the ramp 5.

Pour améliorer cette liaison, il est possible comme représenté. sur la figure 6, de faire passer dans le pied 3 de l'ancre, deux ou plusieurs fers de renfort 4. Les oeils 2 sont alors formés dans le pied 3. Ainsi, pour un effort total identique, le diamètre des armatures peut être réduit, ce qui conduit à une réduction importante du rayon de courbure de celles-ci et facilite la réalisation des rampes d'appui. Sur la figure 6, la tête 7 de l'ancre se prolonge vers le bas par une tige courte 1, se terminant par un pied 3 muni de deux ouvertures 2, les rampes d'appui pouvant, dans ce cas, être inclinées.To improve this connection, it is possible as shown. in FIG. 6, passing two or more reinforcing irons through the foot 3 of the anchor 4. The eyes 2 are then formed in the foot 3. Thus, for an identical total force, the diameter of the reinforcements can be reduced, which leads to a significant reduction in the radius of curvature thereof and facilitates the production of the support ramps. In FIG. 6, the head 7 of the anchor is extended downwards by a short rod 1, ending in a foot 3 provided with two openings 2, the support ramps being able, in this case, to be inclined.

L'implant selon l'invention peut être soit plein, et obtenu par moulage, forgeage ou usinage, soit creux et constitué essentiellement par un tube comme représenté sur les figures 8 et 9. Dans ce cas, l'extrémité supérieure de la tige 1 peut présenter par exemple un trou taraudé 8, alors que le pied de l'ancre 3 est constitué par un épanouissement 9 du tube qui, comme précédemment, soutient l'armature 4 sur une partie suffisante de sa longueur, cette armature 4 passant, comme précédemment, par l'oeil 2. La courbure de l'épanouissement 9 est telle qu'elle corresponde exactement à la coubure du fer 4 pour maintenir parfaitement celui-ci lorsqu'une traction est appliquée sur la douille 1.The implant according to the invention can be either full, and obtained by molding, forging or machining, or hollow and essentially constituted by a tube as shown in Figures 8 and 9. In this case, the upper end of the rod 1 can present for example a threaded hole 8, while the foot of the anchor 3 is constituted by a development 9 of the tube which, as before, supports the armature 4 over a sufficient part of its length, this armature 4 passing, as previously , by the eye 2. The curvature of the opening 9 is such that it corresponds exactly to the curvature of the iron 4 in order to maintain it perfectly when a traction is applied to the bush 1.

Les figures 10 et 11 montrent respectivement, en vue de face et en vue de côté, l'ancrage dans un panneau de faible épaisseur. On retrouve sur la figure 10 une ancre telle que celle qui est représentée sur la figure 6 permettant le passage de deux armatures 4a et 4b s'étendant dans deux plans verticaux parallèles. Comme celà apparaît sur la figure 10, la tête 7 fait saillie à l'intérieur d'une réservation 10 prévue dans le panneau 11. Mais, selon une caractéristique de l'invention, les armatures 4a et 4b peuvent s'étendre toujours dans deux plans parallèles, selon des angles différents, les deux rampes d'appui 5 présentant des courbures identiques ou différentes. On obtient ainsi une meilleure répartition des fers de renfort à l'intérieur du panneau, ce qui permet d'accroître la sécurité.Figures 10 and 11 show respectively, in front view and in side view, the anchoring in a thin panel. We find in Figure 10 an anchor such as that shown in Figure 6 allowing the passage of two frames 4a and 4b extending in two parallel vertical planes. As shown in FIG. 10, the head 7 projects inside a reservation 10 provided in the panel 11. But, according to a characteristic of the invention, the frames 4a and 4b can always extend in two parallel planes, at different angles, the two support ramps 5 having identical or different curvatures. A better distribution of the reinforcing bars is thus obtained inside the panel, which increases safety.

Les figures 12, 13 et 14 représentent un autre mode de réalisation d'un pied d'ancre 3, dans lequel les rampes 5 excentrées par rapport à la tige 1 peuvent être droites ou inclinées en fonction des besoins. C'est-à-dire que les plans contenant les axes X des rampes sont, soit parallèles à l'axe de l'ancre, soit inclinés par rapport à cet axe.Figures 12, 13 and 14 show another embodiment of an anchor foot 3, in which the ramps 5 offset from the rod 1 can be straight or inclined as required. That is to say that the planes containing the axes X of the ramps are either parallel to the axis of the anchor, or inclined with respect to this axis.

Dans le cas d'un implant à deux fers de renfort, ceux-ci peuvent être fixés dans l'implant par sertissage par exemple, ce qui donne un ensemble rigide, facile à disposer, avant la coulée du constituant du panneau. L'implant à plusieurs rampes de passage permet de diffuser les efforts de l'élément, ce qui est avantageux, notamment si la résistance est très faible, par exemple lorsque le béton n'a pas encore pris sa résistance a la compression définitive. Un implant très court avec plusieurs fers de renfort créé pour la manutention des dalles très minces, peut être également utilisé sur le chant des éléments pour leur relevage et leur manutention verticale. Les rampes d'appui 5 peuvent être, en une ou deux pièces, ajoutées à l'implant par sertissage, soudure ou encore réalisées par déformation de la pièce.In the case of an implant with two reinforcing bars, these can be fixed in the implant by crimping for example, which gives a rigid assembly, easy to arrange, before the casting of the component of the panel. The implant with several passage ramps makes it possible to diffuse the forces of the element, which is advantageous, especially if the resistance is very low, for example when the concrete has not yet taken its resistance at final compression. A very short implant with several reinforcing bars created for handling very thin slabs can also be used on the edge of the elements for lifting and vertical handling. The support ramps 5 can be, in one or two pieces, added to the implant by crimping, welding or even produced by deformation of the piece.

Les pièces d'ancrage selon l'invention peuvent être obtenues par les procédés de fabrication connus et elles peuvent être soit monobloc, soit comporter des éléments rapportés par soudure ou brasage, et, en particulier, le pied muni de ses rampes peut être rapporté sur une tige forgée.The anchoring parts according to the invention can be obtained by known manufacturing methods and they can be either in one piece, or include elements added by welding or brazing, and, in particular, the foot provided with its ramps can be attached to a forged rod.

La forme cônique du pied , particulièrement lorsque celui-ci est évidé puisque le matériau pénètre alors dans l'évidement, permet de contrebalancer les efforts latéraux qui peuvent être appliqués par un engin, lors du relevage d'un panneau. Pour le relevage d'éléments minces, l'implant étant disposé sur chant, une liaison par soudure, par exemple, entre l'implant et le fer de renfort peut supprimer toute articulation, ce qui limite les fissurations lors du relevage.The conical shape of the foot, particularly when the latter is hollowed out since the material then enters the recess, makes it possible to counterbalance the lateral forces which can be applied by a machine, when lifting a panel. For the lifting of thin elements, the implant being placed on edge, a welded connection, for example, between the implant and the reinforcing iron can eliminate any articulation, which limits cracks during lifting.

Il va de soi que de nombreuses variantes peuvent être introduites, notamment par substitution de moyens techniquement équivalents sans pour autant sortir du cadre de l'invention telle que définie par les revendications.It goes without saying that many variants can be introduced, in particular by substitution of technically equivalent means without departing from the scope of the invention as defined by the claims.

Claims (9)

  1. An anchoring piece for hardenable material (11), the piece including at least one curved reinforcing iron (4) and a one-piece implant comprising: a portion (7) remaining outside the material (11) and intended to be grasped; a shank (1) having an axis of symmetry; and a base (3) having larger dimensions than the shank (1); is characterized in that the base (3) includes at least one cylindrical support and guide strip (5) for a reinforcing iron, the strip being hollowed out in its top face in order to receive the reinforcing iron (4), the angle of curvature of the strip (5) being equal to the angle of curvature of the reinforcing iron (4).
  2. An anchoring piece according to claim 1, characterized in that the bottom of the shank (1) is pierced by at least one eye (2) extending in a direction substantially perpendicular to the axis of symmetry, the top of the base (3) being hollowed out to constitute the support strip (5).
  3. An anchoring piece according to claim 1, characterized in that the strip (5) is offset from the axis of symmetry of the shank (1).
  4. An anchoring piece according to claim 3, characterized in that the base (3) includes at least two support strips disposed symmetrically about the axis of the shank (1).
  5. An anchoring piece according to claim 4, characterized in that the base (3) of the anchor is pierced by two eyes (2), each being disposed in line with a strip (5).
  6. An anchoring piece according to claim 2, characterized in that it is tubular, its base (3) being formed by a flare (9) at the bottom end of the tube (1) with the curvature of the flare being substantially equal to the curvature of the reinforcing bar (4).
  7. An anchoring piece according to claim 3 or 5, characterized in that the base (3) has at least two support strips (5) of different curvatures.
  8. An anchoring piece according to claim 1, characterized in that the base (3) is circularly symmetrical, with the bottom of the base (3) including a hollow (6).
  9. An anchoring piece according to any preceding claim, characterized in that the planes of the axes (X) of the support strip (5) are parallel to the axis of the anchoring piece.
EP89908195A 1988-07-11 1989-07-10 Anchorage piece, in particular for concrete Expired - Lifetime EP0383870B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89908195T ATE95872T1 (en) 1988-07-11 1989-07-10 ANCHORING DEVICE ESPECIALLY FOR CONCRETE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8809386A FR2633959B1 (en) 1988-07-11 1988-07-11 ANCHORING PIECE, PARTICULARLY FOR CONCRETE
FR8809386 1988-07-11

Publications (2)

Publication Number Publication Date
EP0383870A1 EP0383870A1 (en) 1990-08-29
EP0383870B1 true EP0383870B1 (en) 1993-10-13

Family

ID=9368311

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89908195A Expired - Lifetime EP0383870B1 (en) 1988-07-11 1989-07-10 Anchorage piece, in particular for concrete

Country Status (11)

Country Link
US (1) US5469675A (en)
EP (1) EP0383870B1 (en)
JP (1) JPH03500315A (en)
KR (1) KR900702163A (en)
AU (1) AU619874B2 (en)
CA (1) CA1335475C (en)
DE (1) DE68909917T2 (en)
ES (1) ES2016146A6 (en)
FR (1) FR2633959B1 (en)
HK (1) HK77994A (en)
WO (1) WO1990000658A1 (en)

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Also Published As

Publication number Publication date
AU619874B2 (en) 1992-02-06
FR2633959A1 (en) 1990-01-12
HK77994A (en) 1994-08-12
AU3878289A (en) 1990-02-05
ES2016146A6 (en) 1990-10-16
CA1335475C (en) 1995-05-09
JPH03500315A (en) 1991-01-24
DE68909917T2 (en) 1994-04-21
KR900702163A (en) 1990-12-06
EP0383870A1 (en) 1990-08-29
US5469675A (en) 1995-11-28
WO1990000658A1 (en) 1990-01-25
FR2633959B1 (en) 1992-07-24
DE68909917D1 (en) 1993-11-18

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