EP3505305A1 - Form removal bar and nail puller - Google Patents

Form removal bar and nail puller Download PDF

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Publication number
EP3505305A1
EP3505305A1 EP18209221.3A EP18209221A EP3505305A1 EP 3505305 A1 EP3505305 A1 EP 3505305A1 EP 18209221 A EP18209221 A EP 18209221A EP 3505305 A1 EP3505305 A1 EP 3505305A1
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EP
European Patent Office
Prior art keywords
bar
nail
curvature
gooseneck
section
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Granted
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EP18209221.3A
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German (de)
French (fr)
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EP3505305B1 (en
Inventor
Christophe CIPRELLI
Jean-Jacques Fabre
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MOB Mondelin SAS
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MOB Mondelin SAS
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Publication of EP3505305A1 publication Critical patent/EP3505305A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C11/00—Nail, spike, and staple extractors
    • 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
    • E04G19/00—Auxiliary treatment of forms, e.g. dismantling; Cleaning devices
    • 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
    • E04G23/00—Working measures on existing buildings
    • E04G23/08—Wrecking of buildings
    • E04G2023/085—Wrecking of buildings crowbars specially adapted for wrecking wooden buildings

Definitions

  • the invention relates to the technical sector of hand tools, and more particularly relates to a so-called stripping bar or nail puller.
  • This bar generally forged, includes a longitudinal body acting as a lever to overcome the weight of a load or the resistance of a depressed nail.
  • This bar comprises a first beveled gooseneck end to be positioned in particular under the load to be lifted, or under the head of the nail.
  • This first end has a longitudinal slot, for example V-shaped, for the passage of the nail head to tear.
  • the bar includes a bearing and pivot area, located at the gooseneck along said bar, and a second gripping end for applying a force and performing a lever effect to lift the load or pull the nail.
  • This type of bar is, for example, disclosed by US Pat. No. 6,257,553.
  • This type of bar generally has a flat face, at the first end in gooseneck, intended to bear against the ground during the operation of lifting a nail or lifting a load.
  • the gooseneck has a radius of curvature and is extended by a planar face extending generally over a length beyond the bottom of the V-shaped slot.
  • the angle between the planar face and the body axis longitudinal axis is, in this example, greater than 90 °.
  • One of the aims of the invention is therefore to overcome the drawbacks of the prior art by proposing a stripping bar and nail puller for lifting a load, or to pull a nail with a progressive effort, and relatively low in the first few millimeters of lifting the load or tearing off the nail.
  • a formwork bar has been developed with a forged nail puller comprising a longitudinal body with a first beveled gooseneck end and slotted longitudinally for the passage of a head of a nail.
  • the longitudinal body having a section with a larger dimension in the general plane of the bar than in an orthogonal plane.
  • the gooseneck has successive radii of curvature gradually increasing towards the first end to the level of the bottom of the longitudinal slot.
  • the bar has a high rigidity because the section has a larger dimension in the general plane of the bar, that is to say in the direction of the force applied to the bar during the lifting of the bar. a load or tearing of a nail.
  • the swan neck curvature which starts at the bottom of the longitudinal slot, and which has successive radii of curvature allows a progressiveness of the force applied to the bar, from the lifting of a load or tearing a nail.
  • the section of the bar is generally oval, and more particularly oblong.
  • the gooseneck has at least three successive radii of curvature. For example, towards the first end, a first radius of curvature of between 35 and 40 millimeters, a second radius of curvature between 70 and 75 millimeters, and a third radius of curvature between 160 and 165 millimeters.
  • the first beveled end has a flat face intended to bear against the ground during the operation of lifting a load or pulling a nail, said flat face extending from the first end to at the bottom of the longitudinal slot.
  • the length of the flat face is between 30 and 40 millimeters, and the angle between the planar face and the axis of the longitudinal body is between 80 and 85 degrees.
  • the section has an area greater than 200 mm 2 .
  • the section when the bar has an effective length greater than 600 mm, the section has an area greater than 300 mm 2 .
  • the thickness of the first beveled end increases progressively from the first end to the end. at the bottom of the longitudinal slot.
  • the invention relates to a hand tool of the bar type (1) or form release pliers, or nail puller, used to lift a load or tear a nail (5).
  • this bar (1) forged, comprises a longitudinal body (2) with a first end (3) beveled gooseneck (4) and slotted longitudinally by a slot (7) for the passage of a head of a nail (5).
  • the bar (1) has a second end (6), preferably also beveled, for gripping and applying a force.
  • the thickness of the first end (3) beveled of the bar (1), in particular that intended to be positioned under the load to be lifted, or under the nail (5) to tear gradually increases from said first end (3) to at the bottom of the longitudinal slot (7). In this way, it is easier for a user to insert the tapered end of the bar (1) under the load to be lifted.
  • the bar (1) may have different effective lengths, in particular ranging from 350 mm to 1200 mm.
  • the latter has a cross section having an area greater than 200 mm 2 when the bar (1) has an effective length of less than 600 mm, and a surface greater than 300 mm 2 when the effective length is greater than 600 mm.
  • the section is oblong and has a width of 12 mm and a length of 22 mm for an area of 233 mm 2 and an effective length of the bar (1) less than 600 mm.
  • the bar (1) has an oblong section with a width of 16 mm and a length of 30 mm, for an area of 425 mm 2 , and an effective length of the bar (1) greater than 600 mm.
  • the gooseneck (4) has successive radii of curvature (R1, R2, R3) increasing towards the first end (3) and to the bottom of the longitudinal slot (7).
  • the gooseneck end (4) comprises, in the direction of the first end (3), a first radius of curvature (R1) of between 35 and 40 millimeters, a second radius of curvature (R2) of between 70 and 75 millimeters, and a third radius of curvature (R3) between 160 and 165 millimeters.
  • R1 first radius of curvature
  • R2 second radius of curvature
  • R3 third radius of curvature
  • the first end (3) beveled has a flat face (8) intended to bear against the ground during the operation of lifting a load or pulling a nail (5).
  • This flat face (8) extends from the first end (3) beveled to the level of the bottom of the longitudinal slot (7), and has for example a length of between 30 and 40 millimeters.
  • the angle (A) between the planar face (8) and the axis of the longitudinal body (2) is between 80 and 85 degrees.
  • FIG 5 it is illustrated a graph which represents the distance "d” according to the height "h".
  • three curves have been plotted to characterize three different types of bar (1).
  • the curve (9) which connects the square patterns corresponds to the bar (1) according to the invention.
  • the distance "d” for the bar (1) of the present invention is relatively weak, and less than the distance "d” of the other bars (1).
  • the force applied to the second end (6) of the bar (1) to remove the nail (5) or lift a load is therefore lower with the bar (1) according to the present invention in the first few millimeters of lifting or tearing.
  • the curve is relatively circular, without free break point, in contrast to the curves representing the bars (1) of the state of the art.
  • the invention provides a bar (1) easier to use, especially on the first few millimeters of tearing of the nail (5) or lifting of a load, and the effort is progressive without point hard.

Abstract

Barre (1) de décoffrage et arrache-clou, forgée, comprenant un corps longitudinal (2) avec une première extrémité (3) biseautée en col de cygne (4) et fendue longitudinalement pour le passage d'une tête d'un clou (5), le corps longitudinal (2) présente une section présentant une dimension plus importante dans le plan général de la barre (1) que dans un plan orthogonal.Selon l'invention, le col de cygne (4) présente des rayons de courbure (R1, R2, R3) successifs augmentant progressivement en direction de la première extrémité (3) jusqu'au niveau du fond de la fente longitudinale (7).Forging bar (1) and nail puller, forged, comprising a longitudinal body (2) with a first end (3) beveled gooseneck (4) and slotted longitudinally for the passage of a head of a nail ( 5), the longitudinal body (2) has a section having a larger dimension in the general plane of the bar (1) than in an orthogonal plane.According to the invention, the gooseneck (4) has radii of curvature (R1, R2, R3) successively increasing towards the first end (3) to the level of the bottom of the longitudinal slot (7).

Description

DOMAINE TECHNIQUETECHNICAL AREA

L'invention se rattache au secteur technique des outils à main, et concerne plus particulièrement une barre dite de décoffrage ou arrache-clou.The invention relates to the technical sector of hand tools, and more particularly relates to a so-called stripping bar or nail puller.

ART ANTÉRIEURPRIOR ART

Il est connu de l'art antérieur d'utiliser un outil à main, communément appelé barre ou pince de décoffrage, ou arrache-clou. Cette barre, généralement forgée, comprend un corps longitudinal faisant office de levier pour vaincre le poids d'une charge ou la résistance d'un clou enfoncé. Cette barre comprend une première extrémité biseautée en col de cygne à positionner notamment sous la charge à soulever, ou sous la tête du clou. Cette première extrémité présente une fente longitudinale, par exemple en forme de V, pour le passage de la tête du clou à arracher. La barre comprend une zone d'appui et de pivot, localisée au niveau du col de cygne le long de ladite barre, et une deuxième extrémité de préhension pour appliquer un effort et réaliser un effet de levier pour soulever la charge ou arracher le clou.It is known from the prior art to use a hand tool, commonly called stripping bar or pliers, or nail puller. This bar, generally forged, includes a longitudinal body acting as a lever to overcome the weight of a load or the resistance of a depressed nail. This bar comprises a first beveled gooseneck end to be positioned in particular under the load to be lifted, or under the head of the nail. This first end has a longitudinal slot, for example V-shaped, for the passage of the nail head to tear. The bar includes a bearing and pivot area, located at the gooseneck along said bar, and a second gripping end for applying a force and performing a lever effect to lift the load or pull the nail.

Ce type de barre est, par exemple, divulgué par le brevet américain n° 6,257,553. Ce type de barre présente généralement une face plane, au niveau de la première extrémité en col de cygne, destinée à venir en appui au sol lors de l'opération d'arrachage d'un clou ou de soulèvement d'une charge. Le col de cygne présente un rayon de courbure et est prolongé par une face plane s'étendant généralement sur une longueur allant au-delà du fond de la fente en forme de V. L'angle entre la face plane et l'axe du corps longitudinal est, dans cet exemple, supérieur à 90°.This type of bar is, for example, disclosed by US Pat. No. 6,257,553. This type of bar generally has a flat face, at the first end in gooseneck, intended to bear against the ground during the operation of lifting a nail or lifting a load. The gooseneck has a radius of curvature and is extended by a planar face extending generally over a length beyond the bottom of the V-shaped slot. The angle between the planar face and the body axis longitudinal axis is, in this example, greater than 90 °.

De ce qui précède, l'inconvénient qui résulte de ce type de barre est, d'une part, que l'effort appliqué au niveau de la deuxième extrémité pour soulever une charge ou arracher un clou n'est pas progressif et, d'autre part, qu'il est nécessaire de fournir un effort plus important lors des premiers millimètres de soulèvement de la charge ou d'arrachement du clou.From the foregoing, the disadvantage that results from this type of bar is, on the one hand, that the force applied at the second end to lift a load or tear a nail is not progressive and, d ' on the other hand, it is necessary to provide a greater effort during the first few millimeters of lifting the load or tearing the nail.

EXPOSE DE L'INVENTIONSUMMARY OF THE INVENTION

L'un des buts de l'invention est donc de remédier aux inconvénients de l'art antérieur en proposant une barre de décoffrage et arrache-clou permettant de soulever une charge, ou d'arracher un clou avec un effort progressif, et relativement faible dans les premiers millimètres de soulèvement de la charge ou d'arrachement du clou.One of the aims of the invention is therefore to overcome the drawbacks of the prior art by proposing a stripping bar and nail puller for lifting a load, or to pull a nail with a progressive effort, and relatively low in the first few millimeters of lifting the load or tearing off the nail.

À cet effet, il a été mis au point une barre de décoffrage et arrache-clou, forgée, comprenant un corps longitudinal avec une première extrémité biseautée en col de cygne et fendue longitudinalement pour le passage d'une tête d'un clou. Le corps longitudinal présentant une section avec une dimension plus importante dans le plan général de la barre que dans un plan orthogonal.For this purpose, a formwork bar has been developed with a forged nail puller comprising a longitudinal body with a first beveled gooseneck end and slotted longitudinally for the passage of a head of a nail. The longitudinal body having a section with a larger dimension in the general plane of the bar than in an orthogonal plane.

Selon l'invention, le col de cygne présente des rayons de courbure successifs augmentant progressivement en direction de la première extrémité jusqu'au niveau du fond de la fente longitudinale.According to the invention, the gooseneck has successive radii of curvature gradually increasing towards the first end to the level of the bottom of the longitudinal slot.

De cette manière, la barre présente une rigidité importante du fait que la section présente une dimension plus importante dans le plan général de la barre, c'est-à-dire dans la direction de l'effort appliqué sur la barre lors du soulèvement d'une charge ou de l'arrachement d'un clou. De plus, la courbure en col de cygne, qui démarre au niveau du fond de la fente longitudinale, et qui présente des rayons de courbure successifs permet une progressivité de l'effort appliqué sur la barre, dès le soulèvement d'une charge ou de l'arrachement d'un clou.In this way, the bar has a high rigidity because the section has a larger dimension in the general plane of the bar, that is to say in the direction of the force applied to the bar during the lifting of the bar. a load or tearing of a nail. In addition, the swan neck curvature, which starts at the bottom of the longitudinal slot, and which has successive radii of curvature allows a progressiveness of the force applied to the bar, from the lifting of a load or tearing a nail.

De préférence, la section de la barre est de forme générale ovale, et plus particulièrement oblongue.Preferably, the section of the bar is generally oval, and more particularly oblong.

Selon une forme de réalisation particulière, le col de cygne présente au moins trois rayons de courbure successifs. Par exemple, en direction de la première extrémité, un premier rayon de courbure compris entre 35 et 40 millimètres, un deuxième rayon de courbure compris entre 70 et 75 millimètres, et un troisième rayon de courbure compris entre 160 et 165 millimètres.According to a particular embodiment, the gooseneck has at least three successive radii of curvature. For example, towards the first end, a first radius of curvature of between 35 and 40 millimeters, a second radius of curvature between 70 and 75 millimeters, and a third radius of curvature between 160 and 165 millimeters.

De préférence, la première extrémité biseautée présente une face plane destinée à venir en appui au sol lors de l'opération de soulèvement d'une charge ou d'arrachage d'un clou, ladite face plane s'étendant de la première extrémité jusqu'au niveau du fond de la fente longitudinale.Preferably, the first beveled end has a flat face intended to bear against the ground during the operation of lifting a load or pulling a nail, said flat face extending from the first end to at the bottom of the longitudinal slot.

Par exemple, la longueur de la face plane est comprise entre 30 et 40 millimètres, et l'angle entre la face plane et l'axe du corps longitudinal est compris entre 80 et 85 degrés.For example, the length of the flat face is between 30 and 40 millimeters, and the angle between the planar face and the axis of the longitudinal body is between 80 and 85 degrees.

Afin de présenter une rigidité optimale, lorsque la barre présente une longueur effective, à ne pas confondre avec la longueur déployée de la barre, inférieure à 600 mm, la section présente une surface supérieure à 200 mm2.In order to have optimum rigidity, when the bar has an effective length, not to be confused with the extended length of the bar, less than 600 mm, the section has an area greater than 200 mm 2 .

Selon une autre forme de réalisation, lorsque la barre présente une longueur effective supérieure à 600 mm, la section présente une surface supérieure à 300 mm2.According to another embodiment, when the bar has an effective length greater than 600 mm, the section has an area greater than 300 mm 2 .

D'une manière avantageuse, pour faciliter l'insertion de l'extrémité biseautée de la barre sous la charge à soulever, et améliorer davantage la progressivité de l'effort, l'épaisseur de la première extrémité biseautée croîtt progressivement de la première extrémité jusqu'au niveau du fond de la fente longitudinale.Advantageously, to facilitate the insertion of the beveled end of the bar under the load to be lifted, and further improve the progressivity of the force, the thickness of the first beveled end increases progressively from the first end to the end. at the bottom of the longitudinal slot.

DESCRIPTION SOMMAIRE DES FIGURESSUMMARY DESCRIPTION OF THE FIGURES

D'autres avantages et caractéristiques ressortiront mieux de la description qui va suivre, donnée à titre d'exemple non limitatif, de la barre selon l'invention, à partir des dessins annexés dans lesquels :

  • la figure 1 est une vue de face de la barre selon l'invention, en conformation déployée, avant cintrage du col de cygne ;
  • la figure 2 est une vue similaire à celle de la figure 1, la barre étant vue de côté ;
  • la figure 3 est une vue de détail de l'extrémité en col de cygne de la barre, vue de côté ;
  • la figure 4 est un graphique illustrant, lors de l'arrachage d'un clou, la distance entre le point de contact de la barre avec le sol et la projection sur le sol de la position de la tête du clou, en fonction de la hauteur de la tête du clou par rapport au sol.
Other advantages and features will become more apparent from the following description, given by way of non-limiting example, of the bar according to the invention, from the appended drawings in which:
  • the figure 1 is a front view of the bar according to the invention, in unfolded conformation, before bending of the gooseneck;
  • the figure 2 is a view similar to that of the figure 1 , the bar being seen from the side;
  • the figure 3 is a detail view of the gooseneck end of the bar, seen from the side;
  • the figure 4 is a graph illustrating, when a nail is being pulled out, the distance between the point of contact of the bar with the ground and the projection on the ground of the position of the nail head, as a function of the height of the nail. head of the nail in relation to the ground.

DESCRIPTION DÉTAILLÉE DE L'INVENTIONDETAILED DESCRIPTION OF THE INVENTION

L'invention concerne un outil à main du type barre (1) ou pince de décoffrage, ou arrache-clou, utilisé pour soulever une charge ou bien arracher un clou (5). En référence aux figures 1 à 3 et de manière connue, cette barre (1), forgée, comprend un corps longitudinal (2) avec une première extrémité (3) biseautée en col de cygne (4) et fendue longitudinalement par une fente (7) pour le passage d'une tête d'un clou (5). La barre (1) présente une deuxième extrémité (6), de préférence également biseautée, pour la préhension et l'application d'un effort.The invention relates to a hand tool of the bar type (1) or form release pliers, or nail puller, used to lift a load or tear a nail (5). With reference to Figures 1 to 3 and in known manner, this bar (1), forged, comprises a longitudinal body (2) with a first end (3) beveled gooseneck (4) and slotted longitudinally by a slot (7) for the passage of a head of a nail (5). The bar (1) has a second end (6), preferably also beveled, for gripping and applying a force.

L'épaisseur de la première extrémité (3) biseautée de la barre (1), notamment celle destinée à se positionner sous la charge à soulever, ou bien sous le clou (5) à arracher croît progressivement de ladite première extrémité (3) jusqu'au niveau du fond de la fente longitudinale (7). De cette manière, il est plus aisé pour un utilisateur d'insérer l'extrémité biseautée de la barre (1) sous la charge à soulever.The thickness of the first end (3) beveled of the bar (1), in particular that intended to be positioned under the load to be lifted, or under the nail (5) to tear gradually increases from said first end (3) to at the bottom of the longitudinal slot (7). In this way, it is easier for a user to insert the tapered end of the bar (1) under the load to be lifted.

La barre (1) peut présenter différentes longueurs effectives, notamment allant de 350 mm jusqu'à 1200 mm. Afin d'améliorer la rigidité de la barre (1), cette dernière présente une section transversale présentant une surface supérieure à 200 mm2 lorsque la barre (1) présente une longueur effective inférieure à 600 mm, et une surface supérieure à 300 mm2 lorsque la longueur effective est supérieure à 600 mm.The bar (1) may have different effective lengths, in particular ranging from 350 mm to 1200 mm. In order to improve the rigidity of the bar (1), the latter has a cross section having an area greater than 200 mm 2 when the bar (1) has an effective length of less than 600 mm, and a surface greater than 300 mm 2 when the effective length is greater than 600 mm.

À titre d'exemple, la section est oblongue et présente une largeur de 12 mm et une longueur de 22 mm pour une surface de 233 mm2 et une longueur effective de la barre (1) inférieure à 600 mm. Selon un autre exemple, la barre (1) présente une section oblongue d'une largeur de 16 mm et d'une longueur de 30 mm, pour une surface de 425 mm2, et une longueur effective de la barre (1) supérieure à 600 mm.For example, the section is oblong and has a width of 12 mm and a length of 22 mm for an area of 233 mm 2 and an effective length of the bar (1) less than 600 mm. In another example, the bar (1) has an oblong section with a width of 16 mm and a length of 30 mm, for an area of 425 mm 2 , and an effective length of the bar (1) greater than 600 mm.

En référence à la figure 3, selon l'invention, le col de cygne (4) présente des rayons de courbure (R1, R2, R3) successifs augmentant progressivement en direction de la première extrémité (3) et jusqu'au fond de la fente (7) longitudinale.With reference to the figure 3 according to the invention, the gooseneck (4) has successive radii of curvature (R1, R2, R3) increasing towards the first end (3) and to the bottom of the longitudinal slot (7).

Par exemple, en référence à la figure 4, l'extrémité en col de cygne (4) comprend, en direction de la première extrémité (3), un premier rayon de courbure (R1) compris entre 35 et 40 millimètres, un deuxième rayon de courbure (R2) compris entre 70 et 75 millimètres, et un troisième rayon de courbure (R3) compris entre 160 et 165 millimètres.For example, with reference to figure 4 the gooseneck end (4) comprises, in the direction of the first end (3), a first radius of curvature (R1) of between 35 and 40 millimeters, a second radius of curvature (R2) of between 70 and 75 millimeters, and a third radius of curvature (R3) between 160 and 165 millimeters.

La première extrémité (3) biseautée présente une face plane (8) destinée à venir en appui au sol lors de l'opération de soulèvement d'une charge ou d'arrachage d'un clou (5). Cette face plane (8) s'étend de la première extrémité (3) biseautée jusqu'au niveau du fond de la fente longitudinale (7), et présente par exemple une longueur comprise entre 30 et 40 millimètres. De plus, l'angle (A) entre la face plane (8) et l'axe du corps longitudinal (2) est compris entre 80 et 85 degrés.The first end (3) beveled has a flat face (8) intended to bear against the ground during the operation of lifting a load or pulling a nail (5). This flat face (8) extends from the first end (3) beveled to the level of the bottom of the longitudinal slot (7), and has for example a length of between 30 and 40 millimeters. In addition, the angle (A) between the planar face (8) and the axis of the longitudinal body (2) is between 80 and 85 degrees.

Il ressort de ce qui précède que l'effort à appliquer pour soulever une charge ou arracher un clou (5) est relativement faible dans les premiers millimètres de soulèvement ou d'arrachement, et est progressif le long du mouvement de levier avec la barre (1).It follows from the foregoing that the force to be applied to lifting a load or tearing a nail (5) is relatively low in the first few millimeters of lifting or tearing, and is progressive along the lever movement with the bar ( 1).

En référence à la figure 4, on a représenté, lors d'une opération d'arrachage d'un clou (5), la distance « d » entre le point de contact de la barre (1) au niveau du col de cygne (4) et la projection verticale sur le sol de la tête du clou (5), et « h » la hauteur de ladite tête du clou (5) par rapport au sol.With reference to the figure 4 , during a peel removal operation of a nail (5), the distance "d" between the point of contact of the bar (1) at the gooseneck (4) and the vertical projection is shown on the floor of the nail head (5), and "h" the height of said nail head (5) relative to the ground.

Selon la figure 5, il est illustré un graphique qui représente la distance « d » en fonction de la hauteur « h ». Sur ce graphique, trois courbes ont été tracées pour caractériser trois types de barre (1) différents. La courbe (9) qui relie les motifs carrés correspond à la barre (1) selon l'invention. Ainsi, on aperçoit très clairement que, pour une hauteur « h » inférieure à environ 25 mm, ce qui correspond aux premiers millimètres de soulèvement et d'arrachement du clou (5), la distance « d » pour la barre (1) de la présente invention est relativement faible, et inférieure à la distance « d » des autres barres (1). De ce qui précède, l'effort appliqué à la deuxième extrémité (6) de la barre (1) pour arracher le clou (5) ou soulever une charge est donc plus faible avec la barre (1) selon la présente invention, dans les premiers millimètres de soulèvement ou d'arrachement. De plus, du fait des rayons de courbure (R1, R2, R3) successifs, la courbe est relativement circulaire, sans point franc de cassure, à l'inverse des courbes représentant les barres (1) de l'état de la technique.According to figure 5 , it is illustrated a graph which represents the distance "d" according to the height "h". On this graph, three curves have been plotted to characterize three different types of bar (1). The curve (9) which connects the square patterns corresponds to the bar (1) according to the invention. Thus, it is very clearly seen that, for a height "h" less than about 25 mm, which corresponds to the first millimeters of lifting and tearing of the nail (5), the distance "d" for the bar (1) of the present invention is relatively weak, and less than the distance "d" of the other bars (1). From the above, the force applied to the second end (6) of the bar (1) to remove the nail (5) or lift a load is therefore lower with the bar (1) according to the present invention in the first few millimeters of lifting or tearing. In addition, because of the radii of curvature (R1, R2, R3) successive, the curve is relatively circular, without free break point, in contrast to the curves representing the bars (1) of the state of the art.

De ce qui précède, l'invention fournit bien une barre (1) plus facile à utiliser, notamment sur les premiers millimètres d'arrachement du clou (5) ou de soulèvement d'une charge, et l'effort est progressif, sans point dur.From the foregoing, the invention provides a bar (1) easier to use, especially on the first few millimeters of tearing of the nail (5) or lifting of a load, and the effort is progressive without point hard.

Claims (10)

Barre (1) de décoffrage et arrache-clou, forgée, comprenant un corps longitudinal (2) avec une première extrémité (3) biseautée en col de cygne (4) et fendue longitudinalement par une fente (7) pour le passage d'une tête d'un clou (5), le corps longitudinal (2) présente une section présentant une dimension plus importante dans le plan général de la barre (1) que dans un plan orthogonal, caractérisée en ce que le col de cygne (4) présente des rayons de courbure (R1, R2, R3) successifs augmentant progressivement en direction de la première extrémité (3) jusqu'au niveau du fond de la fente longitudinale (7).Stripping bar (1) and forceps, forged, comprising a longitudinal body (2) with a first end (3) bevelled gooseneck (4) and slotted longitudinally by a slot (7) for the passage of a the head of a nail (5), the longitudinal body (2) has a section having a greater dimension in the general plane of the bar (1) than in an orthogonal plane, characterized in that the gooseneck (4) has successive radii of curvature (R1, R2, R3) increasing towards the first end (3) to the level of the bottom of the longitudinal slot (7). Barre (1) selon la revendication 1, caractérisée en ce que la section est de forme générale ovale.Bar (1) according to claim 1, characterized in that the section is of oval overall shape. Barre (1) selon la revendication 2, caractérisée en ce que la section ovale présente une forme oblongue.Bar (1) according to claim 2, characterized in that the oval section has an oblong shape. Barre (1) selon la revendication 1, caractérisée en ce que le col de cygne (4) présente au moins trois rayons de courbure (R1, R2, R3) successifs.Bar (1) according to claim 1, characterized in that the gooseneck (4) has at least three radii of curvature (R1, R2, R3) successive. Barre (1) selon la revendication 4, caractérisée en ce que le col de cygne (4) présente, en direction de la première extrémité (3), un premier rayon de courbure (R1) compris entre 35 et 40 mm, un deuxième rayon de courbure (R2) compris entre 70 et 75 mm, et un troisième rayon de courbure (R3) compris entre 160 et 165 mm.Bar (1) according to claim 4, characterized in that the gooseneck (4) has, in the direction of the first end (3), a first radius of curvature (R1) of between 35 and 40 mm, a second radius a curvature (R2) of 70 to 75 mm and a third radius of curvature (R3) of 160 to 165 mm. Barre (1) selon la revendication 1, caractérisée en ce que la première extrémité (3) biseautée présente une face plane (8) destinée à venir en appui au sol pour l'opération d'arrachage d'un clou (5), la face plane (8) s'étend de la deuxième extrémité (6) jusqu'au niveau du fond de la fente longitudinale (7).Bar (1) according to claim 1, characterized in that the first end (3) beveled has a flat face (8) intended to bear against the ground for the lifting operation of a nail (5), the planar face (8) extends from the second end (6) to the bottom level of the longitudinal slot (7). Barre (1) selon la revendication 6, caractérisée en ce que la longueur de la face plane (8) est comprise entre 30 et 40 mm, et l'angle (A) entre la face plane (8) et l'axe du corps longitudinal (2) est compris entre 80 et 85°.Bar (1) according to claim 6, characterized in that the length of the flat face (8) is between 30 and 40 mm, and the angle (A) between the flat face (8) and the axis of the body longitudinal (2) is between 80 and 85 °. Barre (1) selon la revendication 1, caractérisée en ce qu'elle présente une longueur effective inférieure à 600 mm, et la section présente une surface supérieure à 200 mm2.Bar (1) according to claim 1, characterized in that it has an effective length of less than 600 mm, and the section has a surface greater than 200 mm 2 . Barre (1) selon la revendication 1, caractérisée en ce qu'elle présente une longueur effective supérieure à 600 mm, et la section présente une surface supérieure à 300 mm2.Bar (1) according to claim 1, characterized in that it has an effective length greater than 600 mm, and the section has an area greater than 300 mm 2 . Barre (1) selon la revendication 1, caractérisée en ce que l'épaisseur de la première extrémité (3) biseautée croit progressivement de ladite première extrémité (3) jusqu'au niveau du fond de la fente longitudinale (7).Bar (1) according to claim 1, characterized in that the thickness of the first end (3) beveled gradually increases from said first end (3) to the level of the bottom of the longitudinal slot (7).
EP18209221.3A 2018-01-02 2018-11-29 Form removal bar and nail puller Active EP3505305B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1850004A FR3076288B1 (en) 2018-01-02 2018-01-02 DECREASE BAR AND NAIL ROPE

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EP3505305A1 true EP3505305A1 (en) 2019-07-03
EP3505305B1 EP3505305B1 (en) 2020-11-18

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EP (1) EP3505305B1 (en)
FR (1) FR3076288B1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6257553B1 (en) * 1998-07-22 2001-07-10 Olympia Group, Inc. Utility bar
WO2009094697A1 (en) * 2008-01-31 2009-08-06 Richard Townsend A tool
US20100115705A1 (en) * 2008-11-07 2010-05-13 Allen joel Utility bar

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6257553B1 (en) * 1998-07-22 2001-07-10 Olympia Group, Inc. Utility bar
WO2009094697A1 (en) * 2008-01-31 2009-08-06 Richard Townsend A tool
US20100115705A1 (en) * 2008-11-07 2010-05-13 Allen joel Utility bar

Also Published As

Publication number Publication date
FR3076288B1 (en) 2019-11-22
EP3505305B1 (en) 2020-11-18
FR3076288A1 (en) 2019-07-05

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