EP0035461A1 - Spacing element for a shuttering - Google Patents

Spacing element for a shuttering Download PDF

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Publication number
EP0035461A1
EP0035461A1 EP81440009A EP81440009A EP0035461A1 EP 0035461 A1 EP0035461 A1 EP 0035461A1 EP 81440009 A EP81440009 A EP 81440009A EP 81440009 A EP81440009 A EP 81440009A EP 0035461 A1 EP0035461 A1 EP 0035461A1
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EP
European Patent Office
Prior art keywords
loops
loop
formwork
steel wire
folding
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Ceased
Application number
EP81440009A
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German (de)
French (fr)
Inventor
Jackie André De Ruyter
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Individual
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Individual
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Publication date
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Publication of EP0035461A1 publication Critical patent/EP0035461A1/en
Ceased legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
    • E04G17/06—Tying means; Spacers ; Devices for extracting or inserting wall ties
    • E04G17/07—Tying means, the tensional elements of which are fastened or tensioned by means of wedge-shaped members
    • E04G17/0707—One-piece elements
    • E04G17/0721—One-piece elements remaining completely or partially embedded in the cast material

Definitions

  • the present invention relates to a distance device for shuttering elements, in particular for the production of concrete structures, comprising a metal part made of a single piece of steel wire, comprising at each end a flat loop, intended to receive a key for retaining the formwork elements, and stop tabs produced by folding end sections of the steel wire, arranged in a plane substantially perpendicular to the plane of the loops and placed at the front of said loops.
  • the second patent cited also describes a spacer comprising on the one hand a twisted wire and on the other hand, locking keys of extremely complicated design. Indeed, these additional keys of the distancer proper in twisted iron wire, consist of several machined metal parts whose manufacture as well as the installation are very expensive.
  • the present invention proposes to overcome the drawbacks mentioned above by providing a light spacer, resistant and handy, easy to install during assembly of the formwork, the disassembly of the visible parts after formwork is easy, and whose manufacturing cost stay com petitive due to the simplicity of its construction.
  • the distance device is characterized in that the end loops are fully closed, in that the stop tabs are formed by also fully closed loops, in that each end loop has one side in common with the loop forming the corresponding stop tab, and in that the free end of the wire, forming one side of a stop tab, passes inside the corresponding end loop.
  • the distance device produced by bending from a predetermined length of rigid steel wire, has at each of its ends a loop A, respectively A ', having a substantially rectangular shape, the sides being respectively a, b, c, d and a ', b', c ', d'.
  • the sides b and b ' are rounded.
  • the sides can be straight, the angles preferably being rounded to facilitate folding.
  • the loops A and A ' are generally horizontal.
  • the device further comprises two stop tabs B and B ', in the form of loops arranged in a plane substantially perpendicular to the plane of the loops A and A'.
  • These locking tabs are constituted by loops having for example a triangular shape composed respectively of the sides d , e, f, respectively d ', e', f ', the sides f' and g 'being respectively extended by end sections g and g'.
  • the production is not limited to loops b and b 'of triangular shape.
  • These loops could have any geometric shape, in particular a square or rectangular shape, preferably with rounded angles to facilitate folding.
  • FIG. 3 represents a detailed view of a formwork assembled by means of spacers as represented by FIGS. 1 and 2.
  • the formwork boards 1 are in abutment against the stop tabs B, B 'and are retained in place by reinforcement bars 2 and fixing pins 3, which are placed in the loops A and A '.
  • the formwork boards are kept at a given distance h which will determine the thickness of the finished concrete wall.
  • the segments e, f, g and e ', f' g 'come to rest inside the boards and guarantee their constant spacing.
  • the reinforcing irons 2 are placed ensuring the rigidity and the retention of the boards 1, then the keys 3, slightly conical, which ensure the locking of the fixing device and prevent the boards formwork do not deviate when pouring concrete.
  • the section on side a releases the different segments a, b, c, d, e, f, g, that is to say both the loop A and loop B. All that remains in the concrete is the straight rod of the spacer which initially separated the two support legs.
  • this spacer allows to have a device with a weight close to 30 gr. for a distance of 20 cm. Given the large number of these accessories used to mount a formwork, one will understand the savings made and the convenience of handling these parts. Compared to known spacers, which for some require the production of metal parts from stamped sheet metal leading to a spacer whose average weight is of the order of 150 gr., We will understand the savings made by using the spacer according to invention. Its moderate cost price, the simplicity of its installation and the ease with which the user can remove the visible parts, constitute other appreciable advantages of the device according to the invention.
  • the present invention is not limited to the embodiment described.
  • the rectilinear sections g and g ' can be extended by two curved sections h and h' (represented by dotted lines in FIG. 1), which have no other function than to prevent the spacers from cling to each other by forming strings that must be untangled before use.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)

Abstract

Spacing element for a shuttering for concrete walls, enabling the boards to be kept at a constant distance apart, and enabling their retention when pouring the concrete. It comprises a one-piece rigid steel wire provided, at its ends, with bends which define loops A and A' intended to receive the keys which retain the shuttering open, and stops e, f, g and e', f', g' which keep the two boards of the shuttering at a given spacing h. The invention can advantageously be used on all types of commercially available shutterings. <IMAGE>

Description

La présente invention concerne une dispositif distanceur pour éléments de coffrage, en particulier pour la réalisation d'ouvrages en béton, comprenant une pièce métallique constituée d'un seul tenant en fil d'acier, comportant à chaque extrémité une boucle plane, destinée à recevoir une clavette de retenue des éléments de coffrage, et des pattes d'arrêt réalisées par pliage des tronçons d'extrémités du fil d'acier, disposées dans un plan sensiblement perpendiculaire au plan des boucles et placées à l'avant desdites boucles.The present invention relates to a distance device for shuttering elements, in particular for the production of concrete structures, comprising a metal part made of a single piece of steel wire, comprising at each end a flat loop, intended to receive a key for retaining the formwork elements, and stop tabs produced by folding end sections of the steel wire, arranged in a plane substantially perpendicular to the plane of the loops and placed at the front of said loops.

On connaît déjà des distanceurs de ce type, notamment ceux décrits par les brevets américains 3 411 742, 3 544 059 et 1 924 630. Le premier de ces brevets décrit un distanceur classique se composant d'un fil métallique torsadé et de clavettes de retenue réalisées par emboutissage d'une plaque de tôle, de conception compliquée et de fabrication coûteuse. Ce dispositif se rapproche de la classique torsade de fil de fer utilisés depuis des générations pour empêcher l'écartement des planches de coffrage lorsque le béton y est déversé.Distancers of this type are already known, in particular those described by US patents 3,411,742, 3,544,059 and 1,924,630. The first of these patents describes a conventional spacer consisting of a twisted metal wire and retaining pins. produced by stamping a sheet metal plate, of complicated design and expensive to manufacture. This device is similar to the classic twist of wire used for generations to prevent the spacing of the formwork boards when the concrete is poured into it.

Le second brevet cité décrit également un distanceur comportant d'une part un fil de fer torsadé et d'autre part, des clavettes de blocage de conception extrêmement compliquée. En effet, ces clavettes complémentaires du distanceur proprement dit en fil de fer torsadé, se composent de plusieurs pièces métalliques usinées dont la fabrication aussi bien que la mise en place sont très coûteux.The second patent cited also describes a spacer comprising on the one hand a twisted wire and on the other hand, locking keys of extremely complicated design. Indeed, these additional keys of the distancer proper in twisted iron wire, consist of several machined metal parts whose manufacture as well as the installation are very expensive.

Le dernier brevet cité concerne un extenseur réalisé d'une pièce au moyen d'une tige métallique pliée. Toutefois, en raison de la forme du pliage, ce .distanceur doit être réalisé au moyen d'une tige métallique de relativement gros diamètre, pour pouvoir résister aux pressions importantes auxquelles le coffrage est soumis lorsqu'on y déverse le béton.The last patent cited relates to a stent made in one piece by means of a bent metal rod. However, due to the shape of the folding, this spacer must be produced by means of a metal rod of relatively large diameter, in order to be able to withstand the high pressures to which the formwork is subjected when pouring concrete into it.

La présente invention se propose de pallier les inconvénients mentionnés ci-dessus en réalisant un distanceur léger, résistant et maniable, facile à poser lors du montage du coffrage, dont le démontage des parties apparentes après le décoffrage est aisé, et dont le coût de fabrication reste compétitif en raison de la simplicité de sa construction.The present invention proposes to overcome the drawbacks mentioned above by providing a light spacer, resistant and handy, easy to install during assembly of the formwork, the disassembly of the visible parts after formwork is easy, and whose manufacturing cost stay com petitive due to the simplicity of its construction.

Dans ce but, le dispositif distanceur selon l'invention est caractérisé en ce que les boucles d'extrémités sont entièrement fermées, en ce que les pattes d'arrêt sont constituées par des boucles également entièrement fermées, en ce que chaque boucle d'extrémité possède un côté commun avec la boucle formant la patte d'arrêt correspondante, et en ce que l'extrémité libre du fil, formant un côté d'une patte d'arrêt, passe à l'intérieur de la boucle d'extrémité correspondante.For this purpose, the distance device according to the invention is characterized in that the end loops are fully closed, in that the stop tabs are formed by also fully closed loops, in that each end loop has one side in common with the loop forming the corresponding stop tab, and in that the free end of the wire, forming one side of a stop tab, passes inside the corresponding end loop.

La présente invention et ses principaux avantages seront mieux compris en référence à la description d'un exemple de réalisation préférée et des dessins annexés dans lesquels :

  • la figure 1 représente une vue en perspective du dispositif distanceur selon l'invention,
  • la figure 2 représente une vue de face du dispositif distanceur de la figure 1, et
  • la figure 3 représente une vue schématique du dispositif distanceur en place sur un coffrage.
The present invention and its main advantages will be better understood with reference to the description of a preferred embodiment and the accompanying drawings in which:
  • FIG. 1 represents a perspective view of the distance device according to the invention,
  • FIG. 2 represents a front view of the distance device of FIG. 1, and
  • 3 shows a schematic view of the distance device in place on a formwork.

En référence aux figures, le dispositif distanceur, réalisé par pliage à partir d'une longueur prédéterminée de fil d'acier rigide, comporte à chacune de ses extrémités une boucle A, respectivement A', ayant une forme sensiblement rectangulaire, les côtés étant respectivement a,b,c,d et a', b',c',d'. Dans l'exemple représenté par la figure 1, les côtés b et b' sont arrondis. Toutefois, on notera que les côtés peuvent être rectilignes, les angles étant de préférence arrondis pour faciliter le pliage. Lorsque le dispositif distanceur est mis en place sur un coffrage, les boucles A et A' sont en général horizontales.With reference to the figures, the distance device, produced by bending from a predetermined length of rigid steel wire, has at each of its ends a loop A, respectively A ', having a substantially rectangular shape, the sides being respectively a, b, c, d and a ', b', c ', d'. In the example shown in Figure 1, the sides b and b 'are rounded. However, it will be noted that the sides can be straight, the angles preferably being rounded to facilitate folding. When the distance device is placed on a formwork, the loops A and A 'are generally horizontal.

Le dispositif comporte d'autre part deux pattes d'arrêt B et B', en forme de boucles disposées dans un plan sensiblement perpendiculaire au plan des boucles A et A'. Ces pattes d'arrêt sont constituées par des boucles ayant par exemple une forme triangulaire composée respectivement des côtés d, e,f, respectivement d',e',f', les côtés f' et g' étant respectivement prolongés par des tronçons d'extrémité g et g'. Bien entendu la réalisation n'est pas limitée à des boucles b et b' de forme triangulaire. Ces boucles pourraient avoir toutes formes géométriques, notamment une forme carrée ou rectangulaire, avec de préférence dès-angles arrondis pour faciliter le pliage.The device further comprises two stop tabs B and B ', in the form of loops arranged in a plane substantially perpendicular to the plane of the loops A and A'. These locking tabs are constituted by loops having for example a triangular shape composed respectively of the sides d , e, f, respectively d ', e', f ', the sides f' and g 'being respectively extended by end sections g and g'. Of course, the production is not limited to loops b and b 'of triangular shape. These loops could have any geometric shape, in particular a square or rectangular shape, preferably with rounded angles to facilitate folding.

Les tronçons d'extrémité g et g' passent à l'intérieur de la boucle fermée A, respectivement A', ce qui permet d'assurer un auto-blocage en position des pattes d'arrêt, empêchant ainsi que les boucles A, A' se resserent sous l'effet de la pression exercée sur les planches de coffrage.The end sections g and g 'pass inside the closed loop A, respectively A', which ensures self-locking in position of the stop tabs, thus preventing the loops A, A 'tighten under the effect of the pressure exerted on the formwork boards.

La figure 3 représente une vue détaillée d'un coffrage assemblé au moyen de distanceurs tels que représentés par les figures 1 et 2. Les planches de coffrage 1 sont en appui contre les pattes d'arrêt B, B' et sont retenues en place par des fers de renforcement 2 et des clavettes de fixation 3, qui sont placées dans les boucles A et A'. Comme le montre cette figure, les planches de coffrage sont maintenues à un écartement donné h qui déterminera l'épaisseur du mur en béton terminé. Les segments e,f,g et e',f' g' viennent en appui à l'intérieur des planches et garantissent leur écartement constant. Sur les boucles A et A' qui dépassent le coffrage, sont posés les fers de renforcement 2 assurant la rigidité et la retenue des planches 1, puis les clavettes 3, légèrement coniques, qui assurent le verrouillage du dispositif de fixation et évitent que les planches de coffrage ne s'écartent au moment de la coulée du béton.FIG. 3 represents a detailed view of a formwork assembled by means of spacers as represented by FIGS. 1 and 2. The formwork boards 1 are in abutment against the stop tabs B, B 'and are retained in place by reinforcement bars 2 and fixing pins 3, which are placed in the loops A and A '. As this figure shows, the formwork boards are kept at a given distance h which will determine the thickness of the finished concrete wall. The segments e, f, g and e ', f' g 'come to rest inside the boards and guarantee their constant spacing. On the loops A and A ′ which protrude from the formwork, the reinforcing irons 2 are placed ensuring the rigidity and the retention of the boards 1, then the keys 3, slightly conical, which ensure the locking of the fixing device and prevent the boards formwork do not deviate when pouring concrete.

Lorsque la prise du béton a eu lieu, on procède au décoffrage, en faisant sortir la clavette 3 de la boucle A, A', puis on dépose les fers d'armature 2, ce qui permet de retirer également les planches de coffrage 1. Après cette opération, il subsiste les boucles A et A' perpendiculaires au mur et les pattes d'arrêt B et B' disposées à fleur du mur en béton. Il suffit de sectionner au plus près du mur les boucles A et A' en utilisant à cet effet une pince du genre "coupe boulon", pour libérer les boucles A et A'. Cette dernière opération sera facilitée lorsqu'on sectionne la boucle sur le côté a, respectivement a', qui a été préalablement marqué au moyen d'un repère, par exemple un repère peint. La coupe du côté a, libère les différents segments a,b,c,d,e,f,g, c'est-à-dire à la fois la boucle A et la boucle B. Seule reste dans le béton la tige rectiligne du distanceur qui séparait initialement les deux pattes d'appui.When the setting of the concrete has taken place, the formwork is removed, by removing the key 3 from the loop A, A ′, then the reinforcing bars 2 are deposited, which also makes it possible to remove the formwork boards 1. After this operation, there remain the loops A and A 'perpendicular to the wall and the stop lugs B and B' arranged flush with the concrete wall. It is enough to cut as close as possible to the wall the loops A and A 'using for this purpose pliers of the "bolt cutter" type, to release the loops A and A'. This last operation will be facilitated when the loop is cut on the side a, respectively a ', which has been previously marked by means of a marker, for example a painted marker. The section on side a, releases the different segments a, b, c, d, e, f, g, that is to say both the loop A and loop B. All that remains in the concrete is the straight rod of the spacer which initially separated the two support legs.

La réalisation industrielle de ces dispositifs distanceurs, se fera avantageusement par une succession de pliages d'un fil d'acier rigide au moyen d'une machine automatique.The industrial production of these distance devices, will advantageously be done by a succession of bends of a rigid steel wire by means of an automatic machine.

Le mode de réalisation de ce distanceur permet d'avoir un dispositif .d'un poids voisin de 30 gr. pour un distanceur de 20 cm. Compte tenu du grand nombre de ces accessoires utilisés pour monter un coffrage, on comprendra l'économie réalisée et la commodité de la manutention de ces pièces. Comparé aux distanceurs connus, qui nécessitent pour certains la fabrication de pièces métalliques en tôle emboutie aboutissant à un distanceur dont le poids moyen est de l'ordre de 150 gr., on comprendra l'économie réalisée par l'utilisation du distanceur selon l'invention. Son prix de revient modéré, la simplicité de sa mise en place et la facilité avec laquelle l'utilisateur peut retirer les parties apparentes, constituent d'autres avantages appréciables du dispositif selon l'invention.The embodiment of this spacer allows to have a device with a weight close to 30 gr. for a distance of 20 cm. Given the large number of these accessories used to mount a formwork, one will understand the savings made and the convenience of handling these parts. Compared to known spacers, which for some require the production of metal parts from stamped sheet metal leading to a spacer whose average weight is of the order of 150 gr., We will understand the savings made by using the spacer according to invention. Its moderate cost price, the simplicity of its installation and the ease with which the user can remove the visible parts, constitute other appreciable advantages of the device according to the invention.

Bien entendu, la présente invention n'est pas limitée au mode de réalisation décrit. En particulier, les tronçons rectilignes g et g' peuvent être prolongés par deux tronçons courbes h et h' (représentés en.traits pointillés sur la fig. 1), qui n'ont d'autre fonction que d'éviter que les distanceurs ne s'accrochent les uns aux autres en formant des chapelets qu'il faudra démêler avant leur utilisation.Of course, the present invention is not limited to the embodiment described. In particular, the rectilinear sections g and g 'can be extended by two curved sections h and h' (represented by dotted lines in FIG. 1), which have no other function than to prevent the spacers from cling to each other by forming strings that must be untangled before use.

Claims (7)

1. Dispositif distanceur pour éléments de coffrage, en particulier pour la réalisation d'ouvrages en béton, comprenant une pièce métallique constituée d'un seul tenant en fil d'acier, comportant à chaque extrémité une boucle plane, destinée à recevoir une clavette de retenue des éléments de coffrage, et des pattes d'arrêt réalisées par pliage des tonçons d'extrémités du fil d'acier, disposées dans un plan sensiblement perpendiculaire au plan des boucles et placées à l'avant desdites boucles, caractérisé en ce que les boucles d'extrémités sont entièrement fermées, en ce que les pattes d'arrêt sont constituées par des boucles également entièrement fermées, en ce que chaque boucle d'extrémité possède un côté commun avec la boucle formant la patte d'arrêt correspondante, et en ce que l'extrémité libre du fil, formant un côté d'une patte d'arrêt, passe à l'intérieur de la boucle d'extrémité correspondante.1. Distance device for formwork elements, in particular for the production of concrete structures, comprising a metal part made of a single piece of steel wire, comprising at each end a flat loop, intended to receive a key retaining of the formwork elements, and of the locking tabs produced by folding the end tones of the steel wire, arranged in a plane substantially perpendicular to the plane of the loops and placed at the front of said loops, characterized in that the end loops are fully closed, in that the locking tabs are constituted by loops which are also fully closed, in that each end loop has one side in common with the loop forming the corresponding locking tab, and in that the free end of the wire, forming one side of a stopper, passes inside the corresponding end loop. 2. Dispositif selon la revendication 1, caractérisé en ce que les boucles d'extrémités ont une forme sensiblement rectangulaire avec des angles arrondis facilitant le pliage.2. Device according to claim 1, characterized in that the end loops have a substantially rectangular shape with rounded angles facilitating folding. 3. Dispositif selon la revendication 1, caractérisé en ce que les boucles d'arrêt ont le côté extérieur arrondi pour faciliter le pliage.3. Device according to claim 1, characterized in that the stop loops have the rounded outer side to facilitate folding. 4. Dispositif selon la revendication 1, caractérisé en ce que les pattes d'arrêt forment chacune une boucle de forme sensiblement triangulaire, avec des angles arrondis pour faciliter le pliage.4. Device according to claim 1, characterized in that the stop tabs each form a loop of substantially triangular shape, with rounded angles to facilitate folding. 5. Dispositif selon la revendication 1, caractérisé en ce que les pattes d' arrêt ont chacune une forme sensiblement rectangulaire avec le côté supérieur arrondi pour faciliter le pliage.5. Device according to claim 1, characterized in that the stop lugs each have a substantially rectangular shape with the rounded upper side to facilitate folding. 6. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le fil d'acier a un diamètre compris entre 3 et 5 mm, et une résistance à la rupture supérieure à 150 Kg/mm2.6. Device according to any one of the preceding claims, characterized in that the steel wire has a diameter between 3 and 5 mm, and a breaking strength greater than 150 Kg / mm 2 . 7. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que les boucles comportent sur leurs côtés longitudinaux deux zones prédéterminées marquées par des repères, destinés à indiquer l'en- doit où elles seront sectionnées après le décoffrage.7. Device according to any one of the preceding claims, characterized in that the loops have on their longitudinal sides two predetermined areas marked by marks, intended to indicate the place where they will be sectioned after formwork.
EP81440009A 1980-02-27 1981-02-25 Spacing element for a shuttering Ceased EP0035461A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8004749A FR2476726A1 (en) 1980-02-27 1980-02-27 DISTANCE DEVICE FOR FORMWORK
FR8004749 1980-02-27

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EP0035461A1 true EP0035461A1 (en) 1981-09-09

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1924630A (en) * 1930-06-10 1933-08-29 Toogood Henry Herbert Wedge bar
US3411742A (en) * 1966-01-20 1968-11-19 John C. Mcardle Form tie anchor

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3544059A (en) * 1967-11-16 1970-12-01 Volker Rassbach Form tie anchor with reciprocable slide

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1924630A (en) * 1930-06-10 1933-08-29 Toogood Henry Herbert Wedge bar
US3411742A (en) * 1966-01-20 1968-11-19 John C. Mcardle Form tie anchor

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FR2476726A1 (en) 1981-08-28

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