EP0159255A1 - Plug grip for fitting expansion plugs comprising two articulated arms - Google Patents

Plug grip for fitting expansion plugs comprising two articulated arms Download PDF

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Publication number
EP0159255A1
EP0159255A1 EP85400614A EP85400614A EP0159255A1 EP 0159255 A1 EP0159255 A1 EP 0159255A1 EP 85400614 A EP85400614 A EP 85400614A EP 85400614 A EP85400614 A EP 85400614A EP 0159255 A1 EP0159255 A1 EP 0159255A1
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EP
European Patent Office
Prior art keywords
arm
sole
axis
arms
fulcrum
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP85400614A
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German (de)
French (fr)
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EP0159255B1 (en
Inventor
Roger M. Malagnoux
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pierre Grehal et Cie SA
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Pierre Grehal et Cie SA
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Filing date
Publication date
Application filed by Pierre Grehal et Cie SA filed Critical Pierre Grehal et Cie SA
Priority to AT85400614T priority Critical patent/ATE30862T1/en
Publication of EP0159255A1 publication Critical patent/EP0159255A1/en
Application granted granted Critical
Publication of EP0159255B1 publication Critical patent/EP0159255B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J15/00—Riveting
    • B21J15/38—Accessories for use in connection with riveting, e.g. pliers for upsetting; Hand tools for riveting
    • B21J15/386—Pliers for riveting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J15/00—Riveting
    • B21J15/02—Riveting procedures
    • B21J15/04—Riveting hollow rivets mechanically
    • B21J15/043—Riveting hollow rivets mechanically by pulling a mandrel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/0007—Tools for fixing internally screw-threaded tubular fasteners

Definitions

  • the present invention relates to a new clamp for laying expansion plugs.
  • Metal expansion plugs are more and more used in the building technique because they allow solid fastenings in fragile or brittle plates or walls, for example in composite panels, plaster foams of plastic material, in walls and partitions in hollow bricks as well as in other materials in which it is essential to distribute the stresses.
  • the expansion plugs that are found on the market generally include two sockets joined by longitudinal elements which must be caused to flame at the rear of the panel covering which has to support the ankle.
  • the initial deformation that is to say the initiation of buckling of the ankle, requires the application of considerable force while the subsequent flexion of the ankle no longer requires the application of great force but involves a important working stroke.
  • the invention solves this problem by creating a new clamp which makes it possible, for the above application, to exert first of all a very large force then then a substantially weaker force but over a large stroke, which allows the expansion of the wall plugs in a simple and fast way.
  • the object of the invention is to create a clamp which is simple to make, very effective and which does not risk damaging the ankle when it is expanded or the screw which must be able to be screwed and unscrewed as many times as may be necessary afterwards. the installation of the ankle.
  • the pliers for installing the expansion anchors comprising two articulated arms, one of the arms leading to a support sole and the other arm causing the lifting of an expansion anchor screw is characterized in that the second arm has two successive support points, the first support point giving rise to a large ratio of the lever arms to cause the initiation of the buckling of the expansion ankle while the second support point gives rise to a smaller ratio of the lever arms to increase the deformation stroke of the expanding anchor.
  • Fig. 1 is a side elevation partly in section of a clamp according to the invention.
  • Fig. 2 is a partial section of an embodiment detail of the clamp of FIG. 1.
  • Fig. 3 is a top view corresponding to FIG. 1.
  • Fig. 4 is a partial section of the clamp of FIG. 1 illustrating a characteristic operating position.
  • Fig. 5 is a section similar to FIG. 4 illustrating another characteristic operating position.
  • Fig. 6 is an elevation partly in section of a first variant.
  • Fig. 7 is a section seen along the line VII-VII of FIG. 6.
  • Fig. 8 is a section seen along line VIII-VIII of FIG. 6.
  • Figs. 9 and 9a are elevations partly in section of a second variant according to two embodiments.
  • Fig. 10 is a top view corresponding to FIG. 9.
  • Figs. 11 and 12 are partial sectional elevations, illustrating two characteristic positions.
  • Fig. 13 is an elevation of another variant.
  • the pliers according to fig. 1 to 5 comprises a flat sole 1 in which is made a notch 2, preferably slightly V-shaped which opens for example towards the front.
  • the sole 1 connects two cheeks 3, 4 extended by wings 5, 6.
  • the wings 5, 6 delimit with the cheeks 3, 4 shoulders 7, 8 (fig. 3) against which abut the sides 9, 10 of an arm 11 consisting of a U-shaped profile advantageously forming corrugations 12 near its rear part visible to the left of FIG. 1.
  • the wings 5, 6 of the cheeks 3, 4 are held between the sides 9, 10 of the arm 11 by an axis 13.
  • the clamp has a second arm 14, also in the shape of a U, this second arm forming or supporting at its rear part a handle 15.
  • the second arm is engaged by its front end between the cheeks 3, 4 and it supports by lateral sides 16, 17 of the axes 18, 19.
  • the axes 18, 19 pass through elongated slots 20, 21 which are formed in the cheeks 3, 4.
  • the slots 21 are of greater length than the slots 20.
  • the drawing shows that the lateral sides 16, 17 of the second arm 14 define a notch 22 whose width is substantially greater than the diameter of the axis 13.
  • the axis 19 which has passed through the slots 21 supports a stirrup 23 engaged between the cheeks 3, 4 and having a bottom 24 in which a notch 25 is formed coinciding with the notch 2 of the sole 1.
  • a hairpin spring 26 is wound on the axis 13 and tends by its two branches to spread the arms 11, 14 so as to hold the bottom 24 of the stirrup 23 against the top of the sole 1.
  • the construction method described above allows the bottom as well as the cheeks 3, 4 and their wings 5, 6 to be made of very resistant metal, for example made of treated steel, while the arms 11, 14 can be made more economically by mild steel or other metal.
  • the handle 15 may be metallic or preferably constituted by a plastic sheath delimiting a stop 15a. Although it is not essential, it is nevertheless advantageous, as illustrated in fig. 1, to provide a pivoting stand 27 forming a lock and articulated on an axis 28 passed through the arm 11 at its rear end.
  • the crutch 26 is provided with a sole 29 and its length is chosen so that the sole 29 is in the same plane as the sole 1 when said latch is pivoted to be brought into the position for which it is shown in solid lines in fig. 1.
  • the drawing represents a plate 30 behind which an expansion plug 31 must be deformed which contains a screw 32 to firstly ensure its expansion and then the fixing of any object on the plate 30.
  • the screw 32 protrudes slightly beyond the plate 30 and it is possible to bring it into the bottom of the notches 2 and 25, the bottom 24 of the stirrup 23 then taking support under the head 33 of the screw .
  • the axes 18 and 19 carried by the second arm 14 are located in the bottom of the slots 20, 21 and the axis 13 is held in the lower part of the notch 22 by the pin spring 26.
  • the drawing shows that the arm 11 is held by the latch 26 in a position for which the sole 1 is applied flat on the top of the plate 30.
  • the axis 18 By acting on the handle 15, in the direction of the arrow f1, the axis 18 is supported in the bottom of the slots 20, thus constituting a first pivot axis of the second arm 14.
  • the distance separating the axis 18 from the axis 19 being weak, the second arm 14 constitutes a lever with a large ratio of arms of the levers and, consequently, the force exerted on the handle 15 is considerably amplified.
  • This effort has the effect of lifting the axis 19 which drives the stirrup 23 by producing the buckling of the expansion pin 31 which is gradually deformed, as illustrated in FIG. 4.
  • Fig. 6 illustrates a variant in which the cheeks 3, 4 and the sole 1 are directly formed by the first arm 11 which is made, for example, of steel by cutting and stamping a metal plate, the sole 1 and a sole 29a ensuring the junction of the sides 9, 10 and the cheeks 3, 4 described above.
  • the second arm 14 controls the stirrup 23 by the axes 18, 19 as well as by the axis 13. This embodiment allows manufacturing at a lower cost due to the simplification.
  • Figs. 9 to 12 illustrate a variant according to which the first arm 10 constituted by a U-folded fitting forms at its front part cheeks 3a projecting from a flat sole la.
  • the cheeks support an axis 13a on which is wound the pin spring 26 which tends, as in the previous examples, to keep apart the first arm 10 from a second arm 14 which, in this embodiment, defines a notch 22 1 opening towards the top.
  • the second arm 14 supports an axis 19a which can be moved in slots 21a in the cheeks 3a of the first arm.
  • the second arm 14 is also made from a sheet bent in a U and this sheet is shaped at its front part to present in its bottom two curvatures 34 and 35, the curvature 34 being situated between the axis 19a and the axis 13a while the curvature 35 is located beyond the axis 13a relative to the end of the first and second arms which have notches 2 1 and 36 which coincide with each other.
  • the second arm 14 When the second arm 14 is pivoted relative to the first arm 10, the second arm first pivots around the curvature 34, that is to say that the ratio of the lever arms is very large, as described above, which makes it possible to initiate the buckling of the expanding anchor.
  • the axis 19a moves in the slots 21a.
  • Fig. 9a illustrates a development according to which the first and second arms 10 and 14 are provided with handles 40, 41 made of relatively flexible material, for example plastic material, which create an additional thickness and, consequently, reduce the space 42 between the two handles .
  • the space 42 could not be increased to allow the grip of the handles in the same hand and the useful stroke of the clamp not having to be reduced, a boss 43 turned towards the second arm is formed in the first arm.
  • this second arm comes to bear on the boss 43, which increases the useful stroke of the clamp.
  • Fig. 13 illustrates a variant in which the arrangement is similar to that described above with reference to FIGS. 9 to 12.
  • the axis 19a is provided with a stirrup 23 identical to that of the embodiment of FIGS. 1 to 5 and the second arm 14 is also provided with an axis 18 similar to that of FIGS. 1 to 5.
  • the second arm 14 only has the curvature 35 which constitutes the second fulcrum causing a large stroke, as described with reference to FIGS. 9 to 12, the first fulcrum causing the initiation of buckling of the ankle being provided by the axis 18, exactly as described with reference to FIGS. 1 to 5.
  • Fig. 13 shows that the first arm 10 can be provided with a crutch and a support sole 29a, like the embodiment of FIG. 6.
  • the support sole 29a formed from the fixed stand 37 can obviously be articulated if desired in the same way as it appears in FIG. 1.

Abstract

The plug grip comprises a first and a second arms pivotally mounted together, with the first arm leading to a bearing shoe member and the second arm causing a raise of a screw of an expansion plug. The second arm comprises two successive bearing points, a first bearing point providing a great lever arm ratio for causing a start of bending of the expansion plug and a second bearing point providing a smaller lever arms ratio for increasing a distortion stroke of the expansion plug.

Description

La présente invention concerne une nouvelle pince pour la pose des chevilles à expansion. Les chevilles à expansion métalliques sont de plus en plus utilisées dans la technique du bâtiment car elles permettent de réaliser des fixations solides dans des plaques ou parois fragiles ou friables, par exemple dans des panneaux composites, plâtres-mousses de matière plastique, dans des murs et cloisons en briques creuses ainsi que dans d'autres matériaux dans lesquels il est indispensable de répartir les contraintes.The present invention relates to a new clamp for laying expansion plugs. Metal expansion plugs are more and more used in the building technique because they allow solid fastenings in fragile or brittle plates or walls, for example in composite panels, plaster foams of plastic material, in walls and partitions in hollow bricks as well as in other materials in which it is essential to distribute the stresses.

Les chevilles à expansion que l'on trouve sur le marché comportent généralement deux douilles réunies par des éléments longitudinaux qui doivent être amenés à flamber à l'arrière du revêtement du panneau devant supporter la cheville.The expansion plugs that are found on the market generally include two sockets joined by longitudinal elements which must be caused to flame at the rear of the panel covering which has to support the ankle.

La déformation initiale, c'est-à-dire l'amorce de flambement de la cheville nécessite l'application d'une force considérable tandis que la flexion ultérieure de la cheville ne nécessite plus l'application d'une grande force mais implique une course de travail importante.The initial deformation, that is to say the initiation of buckling of the ankle, requires the application of considerable force while the subsequent flexion of the ankle no longer requires the application of great force but involves a important working stroke.

L'invention résout ce problème en créant une nouvelle pince qui permet, pour l'application ci-dessus, d'exercer tout d'abord une force très importante puis ensuite une force sensiblement plus faible mais sur une grande course, ce qui permet l'expansion des chevilles murales d'une façon simple et rapide.The invention solves this problem by creating a new clamp which makes it possible, for the above application, to exert first of all a very large force then then a substantially weaker force but over a large stroke, which allows the expansion of the wall plugs in a simple and fast way.

La technique antérieure a déjà fait connaître des pinces de ce type par le brevet US - A - 3 831 424 et le brevet FR - A - 2 354 853 et le brevet FR - A - 2 343 564.The prior art has already made pliers of this type known by the patent US-A-3,831,424 and the patent FR-A-2,354,853 and the patent FR-A-2,343,564.

L'invention a pour objet de créer une pince simple à réaliser, très efficace et qui ne risque pas d'endommager la cheville lorsqu'elle est expansée ni la vis qui doit pouvoir être vissée et dévissée autant de fois que cela peut être nécessaire après la mise en place de la cheville.The object of the invention is to create a clamp which is simple to make, very effective and which does not risk damaging the ankle when it is expanded or the screw which must be able to be screwed and unscrewed as many times as may be necessary afterwards. the installation of the ankle.

Conformément à l'invention, la pince pour la pose des chevilles à expansion comportant deux bras articulés, l'un des bras menant à une semelle d'appui et l'autre bras provoquant le soulèvement d'une vis à chevilles à expansion est caractérisée en ce que le second bras comporte deux points d'appui successifs, le premier point d'appui donnant naissance à un grand rapport des bras de levier pour provoquer l'amorce du flambement de la cheville à expansion tandis que le second point d'appui donne naissance à un plus petit rapport des bras de levier pour augmenter la course de déformation de la cheville à expansion.According to the invention, the pliers for installing the expansion anchors comprising two articulated arms, one of the arms leading to a support sole and the other arm causing the lifting of an expansion anchor screw is characterized in that the second arm has two successive support points, the first support point giving rise to a large ratio of the lever arms to cause the initiation of the buckling of the expansion ankle while the second support point gives rise to a smaller ratio of the lever arms to increase the deformation stroke of the expanding anchor.

Diverses autres caractéristiques de l'invention ressortent d'ailleurs de la description détaillée qui suit.Various other characteristics of the invention will also emerge from the detailed description which follows.

Des formes de réalisation de l'objet de l'invention sont représentées, à titre d'exemples non limitatifs au dessin annexé.Embodiments of the subject of the invention are shown, by way of nonlimiting examples in the appended drawing.

La fig. 1 est une élévation latérale partie en coupe d'une pince selon l'invention.Fig. 1 is a side elevation partly in section of a clamp according to the invention.

La fig. 2 est une coupe partielle d'un détail de réalisation de la pince de la fig. 1.Fig. 2 is a partial section of an embodiment detail of the clamp of FIG. 1.

La fig. 3 est une vue de dessus correspondant à la fig. 1.Fig. 3 is a top view corresponding to FIG. 1.

La fig. 4 est une coupe partielle de la pince de la fig. 1 illustrant une position caractéristique de fonctionnement. La fig. 5 est une coupe analogue à la fig. 4 illustrant une autre position caractéristique de fonctionnement.Fig. 4 is a partial section of the clamp of FIG. 1 illustrating a characteristic operating position. Fig. 5 is a section similar to FIG. 4 illustrating another characteristic operating position.

La fig. 6 est une élévation en partie en coupe d'une première variante.Fig. 6 is an elevation partly in section of a first variant.

La fig. 7 est une coupe vue suivant la ligne VII-VII de la fig. 6.Fig. 7 is a section seen along the line VII-VII of FIG. 6.

La fig. 8 est une coupe vue suivant la ligne VIII-VIII de la fig. 6.Fig. 8 is a section seen along line VIII-VIII of FIG. 6.

Les fig. 9 et 9a sont des élévations en partie en coupe d'une seconde variante selon deux modes de réalisation.Figs. 9 and 9a are elevations partly in section of a second variant according to two embodiments.

La fig. 10 est une vue de dessus correspondant à la fig. 9.Fig. 10 is a top view corresponding to FIG. 9.

Les fig. 11 et 12 sont des coupes-élévations partielles, illustrant deux positions caractéristiques.Figs. 11 and 12 are partial sectional elevations, illustrating two characteristic positions.

La fig. 13 est une élévation d'une autre variante.Fig. 13 is an elevation of another variant.

La pince selon les fig. 1 à 5 comporte une semelle 1 plane dans laquelle est pratiquée une encoche 2, de préférence légèrement en V qui ouvre par exemple vers l'avant.The pliers according to fig. 1 to 5 comprises a flat sole 1 in which is made a notch 2, preferably slightly V-shaped which opens for example towards the front.

La semelle 1 relie deux joues 3, 4 prolongées par des ailes 5, 6. Les ailes 5, 6 délimitent avec les joues 3, 4 des épaulements 7, 8 (fig. 3) contre lesquels viennent buter les côtés 9, 10 d'un bras 11 constitué par un profilé en U formant, avantageusement, des ondulations 12 près de sa partie arrière visible à la gauche de la fig. 1.The sole 1 connects two cheeks 3, 4 extended by wings 5, 6. The wings 5, 6 delimit with the cheeks 3, 4 shoulders 7, 8 (fig. 3) against which abut the sides 9, 10 of an arm 11 consisting of a U-shaped profile advantageously forming corrugations 12 near its rear part visible to the left of FIG. 1.

Les ailes 5, 6 des joues 3, 4 sont maintenues entre les côtés 9, 10 du bras 11 par un axe 13.The wings 5, 6 of the cheeks 3, 4 are held between the sides 9, 10 of the arm 11 by an axis 13.

La pince comporte un second bras 14, également en forme de U, ce second bras formant ou supportant à sa partie arrière une poignée 15. Le second bras est engagé par son extrémité avant entre les joues 3, 4 et il supporte par des côtés latéraux 16, 17 des axes 18, 19. Les axes 18, 19 passent par des lumières allongées 20, 21 qui sont pratiquées dans les joues 3, 4. Les lumières 21 sont de plus grande longueur que les lumières 20.The clamp has a second arm 14, also in the shape of a U, this second arm forming or supporting at its rear part a handle 15. The second arm is engaged by its front end between the cheeks 3, 4 and it supports by lateral sides 16, 17 of the axes 18, 19. The axes 18, 19 pass through elongated slots 20, 21 which are formed in the cheeks 3, 4. The slots 21 are of greater length than the slots 20.

Outre ce qui précède, le dessin montre que les côtés latéraux 16, 17 du second bras 14 délimitent une encoche 22 dont la largeur est sensiblement plus grande que le diamètre de l'axe 13.In addition to the above, the drawing shows that the lateral sides 16, 17 of the second arm 14 define a notch 22 whose width is substantially greater than the diameter of the axis 13.

L'axe 19 qui est passé dans les lumières 21 supporte un étrier 23 engagé entre les joues 3, 4 et présentant un fond 24 dans lequel est pratiquée une encoche 25 coïncidant avec l'encoche 2 de la semelle 1.The axis 19 which has passed through the slots 21 supports a stirrup 23 engaged between the cheeks 3, 4 and having a bottom 24 in which a notch 25 is formed coinciding with the notch 2 of the sole 1.

Un ressort 26 en épingle est enroulé sur l'axe 13 et tend par ses deux branches à écarter les bras 11, 14 de manière à maintenir le fond 24 de l'étrier 23 contre le dessus de la semelle 1.A hairpin spring 26 is wound on the axis 13 and tends by its two branches to spread the arms 11, 14 so as to hold the bottom 24 of the stirrup 23 against the top of the sole 1.

Le mode de construction décrit ci-dessus permet de réaliser le fond ainsi que les joues 3, 4 et leurs ailes 5, 6 en métal très résistant, par exemple en acier traité, tandis que les bras 11, 14 peuvent être réalisés plus économiquement en acier doux ou autre métal.The construction method described above allows the bottom as well as the cheeks 3, 4 and their wings 5, 6 to be made of very resistant metal, for example made of treated steel, while the arms 11, 14 can be made more economically by mild steel or other metal.

La poignée 15 peut être métallique ou de préférence constituée par un fourreau en matière plastique délimitant une butée 15a. Bien que cela ne soit pas indispensable, il est néanmoins avantageux, comme l'illustre la fig. 1, de prévoir une béquille pivotante 27 formant verrou et articulée sur un axe 28 passé dans le bras 11 à son extrémité arrière. La béquille 26 est munie d'une semelle 29 et sa longueur est choisie de façon que la semelle 29 se trouve dans un même plan que la semelle 1 lorsque ledit verrou est pivoté pour être amené dans la position pour laquelle il est représenté en traits pleins à la fig. 1.The handle 15 may be metallic or preferably constituted by a plastic sheath delimiting a stop 15a. Although it is not essential, it is nevertheless advantageous, as illustrated in fig. 1, to provide a pivoting stand 27 forming a lock and articulated on an axis 28 passed through the arm 11 at its rear end. The crutch 26 is provided with a sole 29 and its length is chosen so that the sole 29 is in the same plane as the sole 1 when said latch is pivoted to be brought into the position for which it is shown in solid lines in fig. 1.

Lorsque la béquille est pivotée pour être amenée à la position 26a, sa semelle 29 sert de verrou à la poignée 15 du second bras 14 lorsque celui-ci est pivoté pour être amené à la position pour laquelle il est représenté en traits interrompus, ce qui correspond à la position de non- utilisation de la pince.When the stand is pivoted to be brought to position 26a, its sole 29 serves as a lock for the handle 15 of the second arm 14 when the latter is pivoted to be brought to the position for which it is shown in broken lines, which corresponds to the position of non-use of the clamp.

Pour faciliter la compréhension du fonctionnement de la pince, le dessin représente une plaque 30 derrière laquelle doit être déformée une cheville à expansion 31 qui contient une vis 32 pour assurer tout d'abord son expansion et ensuite la fixation d'un objet quelconque sur la plaque 30.To make it easier to understand the operation of the clamp, the drawing represents a plate 30 behind which an expansion plug 31 must be deformed which contains a screw 32 to firstly ensure its expansion and then the fixing of any object on the plate 30.

Dans la position représentée à la fig. 1, la vis 32 fait légèrement saillie au-delà de la plaque 30 et il est possible de l'amener dans le fond des encoches 2 et 25, le fond 24 de l'étrier 23 prenant alors appui sous la tête 33 de la vis. Dans cette position, les axes 18 et 19 portés par le second bras 14, se trouvent dans le fond des lumières 20, 21 et l'axe 13 est maintenu dans la partie basse de l'encoche 22 par le ressort en épingle 26.In the position shown in fig. 1, the screw 32 protrudes slightly beyond the plate 30 and it is possible to bring it into the bottom of the notches 2 and 25, the bottom 24 of the stirrup 23 then taking support under the head 33 of the screw . In this position, the axes 18 and 19 carried by the second arm 14 are located in the bottom of the slots 20, 21 and the axis 13 is held in the lower part of the notch 22 by the pin spring 26.

Le dessin montre que le bras 11 est maintenu par le verrou 26 dans une position pour laquelle la semelle 1 est appliquée bien à plat sur le dessus de la plaque 30.The drawing shows that the arm 11 is held by the latch 26 in a position for which the sole 1 is applied flat on the top of the plate 30.

En agissant sur la poignée 15, dans le sens de la flèche f1, l'axe 18 prend appui dans le fond des lumières 20 en constituant ainsi un premier axe de pivotement du second bras 14. La distance séparant l'axe 18 de l'axe 19 étant faible, le second bras 14 constitue un levier à grand rapport de bras des leviers et, par conséquent, l'effort exercé sur la poignée 15 est considérablement amplifié. Cet effort a pour effet de soulever l'axe 19 qui entraîne l'étrier 23 en produisant le flambement de la cheville à expansion 31 qui est progressivement déformée, comme illustré par la fig. 4.By acting on the handle 15, in the direction of the arrow f1, the axis 18 is supported in the bottom of the slots 20, thus constituting a first pivot axis of the second arm 14. The distance separating the axis 18 from the axis 19 being weak, the second arm 14 constitutes a lever with a large ratio of arms of the levers and, consequently, the force exerted on the handle 15 is considerably amplified. This effort has the effect of lifting the axis 19 which drives the stirrup 23 by producing the buckling of the expansion pin 31 which is gradually deformed, as illustrated in FIG. 4.

Lorsque le second bras 14 a suffisamment pivoté, la partie haute 22a de l'encoche 22 vient en appui contre l'axe 13. En continuant à exercer un effort dans le sens de la flèche f1 sur le second bras 14, l'axe de pivotement du second bras est déplacé pour venir au niveau de l'axe 13 puisque le second bras bute contre cet axe. La distance entre l'axe 13 et l'axe 19 étant plus grande que la distance entre les axes 18 et 19, le rapport des bras de levier change par rapport à ce qu'il était précédemment pour devenir plus faible mais il en résulte une augmentation de la course de l'axe 19 pour un même angle de pivotement du second bras 14 ce qui permet de déformer considérablement les chevilles à expansion 31, comme l'illuste la fig. 5.When the second arm 14 has pivoted sufficiently, the upper part 22a of the notch 22 comes to bear against the axis 13. Continuing to exert a force in the direction of the arrow f 1 on the second arm 14, the axis pivoting of the second arm is moved to come at the axis 13 since the second arm abuts against this axis. The distance between axis 13 and axis 19 being greater than the distance between axes 18 and 19, the ratio of the lever arms changes from what it was previously to become smaller but this results in a increase in the stroke of the axis 19 for the same pivot angle of the second arm 14 which makes it possible to considerably deform the expansion pins 31, as illustrated in FIG. 5.

Il ressort de ce qui précède que, dans une première phase de fonctionnement, le rapport des bras de levier étant important, on exerce une force également importante produisant une déformation sur une faible course de la cheville à expansion puis dans un deuxième temps le rapport des bras de levier diminuant la mesure de la déformation de la cheville à expansion croit proportionnellement sans que l'effort à exercer sur la poignée 15 soit sensiblement modifié puisque, initialement, la cheville 31 travaillait à la compression tandis qu'elle travaille ensuite essentiellement à la flexion, dès lors que la force initiale de flambement qui lui est appliquée a provoqué sa déformation initiale.It appears from the above that, in a first operating phase, the ratio of the lever arms being important, an equally large force is exerted producing a deformation over a short stroke of the expanding anchor then in a second time the ratio of lever arm decreasing the measure of the deformation of the expanding dowel increases proportionally without the force to be exerted on the handle 15 being appreciably modified since, initially, the dowel 31 worked in compression while it then works essentially in the bending, since the initial buckling force applied to it caused its initial deformation.

La fig. 6 illustre une variante selon laquelle les joues 3, 4 et la semelle 1 sont directement formées par le premier bras 11 qui est réalisé, par exemple, en acier par découpage et emboutissage d'une plaque métallique, la semelle 1 et une semelle 29a assurant la jonction des côtés 9, 10 et des joues 3, 4 décrits précédemment.Fig. 6 illustrates a variant in which the cheeks 3, 4 and the sole 1 are directly formed by the first arm 11 which is made, for example, of steel by cutting and stamping a metal plate, the sole 1 and a sole 29a ensuring the junction of the sides 9, 10 and the cheeks 3, 4 described above.

Comme dans l'exemple des fig. 1 à 5, le second bras 14 commande l'étrier 23 par les axes 18, 19 ainsi que par l'axe 13. Cette réalisation permet une fabrication à moindre coût du fait de la simplification.As in the example of figs. 1 to 5, the second arm 14 controls the stirrup 23 by the axes 18, 19 as well as by the axis 13. This embodiment allows manufacturing at a lower cost due to the simplification.

Un résultat analogue est obtenu car le premier bras 11 peut être maintenu appliqué sur la plaque 30 par les semelles 1 et 29a.A similar result is obtained because the first arm 11 can be kept applied to the plate 30 by the flanges 1 and 29a.

Les fig. 9 à 12 illustrent une variante selon laquelle le premier bras 10 constitué par une ferrure pliée en U forme à sa partie antérieure des joues 3a saillant à partir d'une semelle plane la. Les joues supportent un axe 13a sur lequel est enroulé le ressort en épingle 26 qui tend, comme dans les exemples précédents, à maintenir écarté le premier bras 10 d'un second bras 14 qui, dans cette réalisation, délimite une encoche 221 ouvrant vers le haut.Figs. 9 to 12 illustrate a variant according to which the first arm 10 constituted by a U-folded fitting forms at its front part cheeks 3a projecting from a flat sole la. The cheeks support an axis 13a on which is wound the pin spring 26 which tends, as in the previous examples, to keep apart the first arm 10 from a second arm 14 which, in this embodiment, defines a notch 22 1 opening towards the top.

Le second bras 14 supporte un axe 19a pouvant être déplacé dans des lumières 21a des joues 3a du premier bras. Le second bras 14 est également fabriqué à partir d'une tôle pliée en U et cette tôle est conformée à sa partie avant pour présenter dans son fond deux courbures 34 et 35, la courbure 34 étant située entre l'axe 19a et l'axe 13a tandis que la courbure 35 est située au-delà de l'axe 13a par rapport à l'extrémité des premier et second bras qui présentent des encoches 21 et 36 qui coïncident entre elles.The second arm 14 supports an axis 19a which can be moved in slots 21a in the cheeks 3a of the first arm. The second arm 14 is also made from a sheet bent in a U and this sheet is shaped at its front part to present in its bottom two curvatures 34 and 35, the curvature 34 being situated between the axis 19a and the axis 13a while the curvature 35 is located beyond the axis 13a relative to the end of the first and second arms which have notches 2 1 and 36 which coincide with each other.

Comme précédemment, lorsque la pince se trouve dans la position représentée à la fig. 9, on l'enfile par les encoches 21 et 36 en dessous de la tête d'une vis puis on tend à rapprocher les deux bras 10 et 14 tout en maintenant la semelle 1a bien à plat contre la plaque d'appui à partir de laquelle fait saillie la vis de la cheville à expansion.As before, when the clamp is in the position shown in FIG. 9, it is threaded by the notches 2 1 and 36 below the head of a screw and then we tend to bring the two arms 10 and 14 together while keeping the sole 1a flat against the support plate from from which protrudes the expansion plug screw.

Lors du pivotement du second bras 14 par rapport au premier bras 10, le second bras pivote tout d'abord autour de la courbure 34, c'est-à-dire que le rapport des bras de levier est très grand, comme décrit précédemment, ce qui permet d'amorcer le flambement de la cheville à expansion. Pendant ce premier mouvement de pivotement, l'axe 19a se déplace dans les lumières 21a.When the second arm 14 is pivoted relative to the first arm 10, the second arm first pivots around the curvature 34, that is to say that the ratio of the lever arms is very large, as described above, which makes it possible to initiate the buckling of the expanding anchor. During this first pivoting movement, the axis 19a moves in the slots 21a.

Lorsque le pivotement du second bras atteint une amplitude suffisante, il prend appui contre le dessus du premier bras par la seconde courbure 35 ce qui diminue le rapport des bras de levier (voir fig. 11 et 12) mais augmente la course de l'axe 19a et donc la mesure dont est déformée la cheville à expansion.When the pivoting of the second arm reaches a sufficient amplitude, it bears against the top of the first arm by the second curvature 35 which decreases the ratio of the lever arms (see fig. 11 and 12) but increases the stroke of the axis 19a and therefore the measurement by which the expanding anchor is deformed.

Le résultat est donc analogue à ce qui est décrit dans ce qui précède en référence aux fig. 1 à 5.The result is therefore analogous to what is described in the foregoing with reference to FIGS. 1 to 5.

La fig. 9a illustre un développement selon lequel les premier et second bras 10 et 14 sont munis de poignées 40, 41 en matière relativement souple, par exemple en matière plastique, qui créent une surépaisseur et, par conséquent, réduisent l'espace 42 entre les deux poignées. L'espace 42 ne pouvait pas être augmenté pour permettre la sàisie des poignées dans une même main et la course utile de la pince ne devant pas être réduite, on forme dans le premier bras 10 un bossage 43 tourné vers le second bras. De cette manière, après le début du flambement de la cheville lors du pivotement du second bras autour de la courbure 34, ce second bras vient en appui sur le bossage 43, ce qui augmente la course utile de la pince. Bien que cela ne soit pas représenté, le même résultat serait obtenu en formant le bossage 43 dans le second bras 14, ledit bossage étant alors dirigé vers le premier bras 10.Fig. 9a illustrates a development according to which the first and second arms 10 and 14 are provided with handles 40, 41 made of relatively flexible material, for example plastic material, which create an additional thickness and, consequently, reduce the space 42 between the two handles . The space 42 could not be increased to allow the grip of the handles in the same hand and the useful stroke of the clamp not having to be reduced, a boss 43 turned towards the second arm is formed in the first arm. In this way, after the onset of the ankle during the pivoting of the second arm around the curvature 34, this second arm comes to bear on the boss 43, which increases the useful stroke of the clamp. Although this is not shown, the same result would be obtained by forming the boss 43 in the second arm 14, said boss then being directed towards the first arm 10.

La fig. 13 illustre une variante selon laquelle la disposition est analogue à celle décrite ci-dessus en référence aux fig. 9 à 12.Fig. 13 illustrates a variant in which the arrangement is similar to that described above with reference to FIGS. 9 to 12.

Cependant, dans cette réalisation, on munit l'axe 19a d'un étrier 23 identique à celui de la réalisation des fig. 1 à 5 et on munit également le second bras 14 d'un axe 18 analogue à celui des fig. 1 à 5. Dans ce cas, le second bras 14 comporte seulement la courbure 35 qui constitue le second point d'appui provoquant une grande course, comme décrit en référence aux fig. 9 à 12, le premier point d'appui provoquant l'amorce de flambement de la cheville étant assuré par l'axe 18, exactement comme décrit en référence aux fig. 1 à 5.However, in this embodiment, the axis 19a is provided with a stirrup 23 identical to that of the embodiment of FIGS. 1 to 5 and the second arm 14 is also provided with an axis 18 similar to that of FIGS. 1 to 5. In this case, the second arm 14 only has the curvature 35 which constitutes the second fulcrum causing a large stroke, as described with reference to FIGS. 9 to 12, the first fulcrum causing the initiation of buckling of the ankle being provided by the axis 18, exactly as described with reference to FIGS. 1 to 5.

La fig. 13 montre que le premier bras 10 peut être muni d'une béquille et d'une semelle d'appui 29a, comme le mode de réalisation de la fig. 6. La semelle d'appui 29a formée à partir de la béquille fixe 37 peut évidemment être articulée si on le désire de la même manière que cela apparaît à la fig. 1.Fig. 13 shows that the first arm 10 can be provided with a crutch and a support sole 29a, like the embodiment of FIG. 6. The support sole 29a formed from the fixed stand 37 can obviously be articulated if desired in the same way as it appears in FIG. 1.

L'invention n'est pas limitée à l'exemple de réalisation représenté et décrit en détail car diverses modifications peuvent y être apportées sans sortir de son cadre.The invention is not limited to the embodiment shown and described in detail since various modifications can be made without departing from its scope.

Claims (11)

1 - Pince pour la pose de chevilles à expansion comportant deux bras articulés, l'un des bras (10) menant à une semelle d'appui (1) et l'autre bras (14) provoquant le soulèvement d'une vis d'une cheville à expansion, caractérisée en ce que le second bras (14) comporte deux points d'appui successifs (18-22, 34-35, 18-35), le premier point d'appui (18-34) donnant naissance à un grand rapport des bras de levier pour provoquer l'amorce du flambement de la cheville à expansion (31) tandis que le second point d'appui (22a, 35) donne naissance à un plus petit rapport des bras de levier pour augmenter la course de déformation de la cheville à expansion. 1 - Pliers for the installation of expansion anchors comprising two articulated arms, one of the arms (10) leading to a support sole (1) and the other arm (14) causing the lifting of a screw an expansion plug, characterized in that the second arm (14) has two successive support points (18-22, 34-35, 18-35), the first support point (18-34) giving rise to a large ratio of the lever arms to cause the initiation of the buckling of the expansion pin (31) while the second fulcrum (22a, 35) gives rise to a smaller ratio of the lever arms to increase the stroke ankle deformation expansion. 2 - Pince selon la revendication 1, caractérisée en ce que le premier bras comporte une première semelle (1, la) et une seconde semelle (29, 29a) se trouvant dans un même plan pour empêcher le pivotement de ce premier bras pendant le pivotement du second bras (14).2 - Pliers according to claim 1, characterized in that the first arm comprises a first sole (1, la) and a second sole (29, 29a) lying in the same plane to prevent pivoting of this first arm during pivoting of the second arm (14). 3 - Pince selon la revendication 1 ou 2, caractérisée en ce que le premier point d'appui est délimité par un axe (18) porté par le second bras et guidé dans une lumière (20) du premier bras.3 - Pliers according to claim 1 or 2, characterized in that the first fulcrum is delimited by an axis (18) carried by the second arm and guided in a lumen (20) of the first arm. 4 - Pince selon l'une des revendications 1 à 3, caractérisée par un axe (13, 13a) pour un ressort en épingle (26) tendant à écarter les deux bras (10, 14) l'un de l'autre, cet axe (13) étant porté par le premier bras (10) en regard d'une encoche (22, 221) du second bras (14).4 - Clamp according to one of claims 1 to 3, characterized by an axis (13, 13a) for a hairpin spring (26) tending to separate the two arms (10, 14) from each other, this axis (13) being carried by the first arm (10) opposite a notch (22, 22 1 ) of the second arm (14). 5 - Pince selon l'une des revendications 1 à 4, caractérisée en ce que le second point d'appui du second bras est constitué par l'axe (13, 13a) sur lequel est enroulé le ressort en épingle (26).5 - Pliers according to one of claims 1 to 4, characterized in that the second fulcrum of the second arm consists of the axis (13, 13a) on which is wound the pin spring (26). 6 - Pince selon l'une des revendications 1 à 4, caractérisée en ce que le second point d'appui est constitué par une courbure que présente la semelle du second bras.6 - Clamp according to one of claims 1 to 4, characterized in that the second fulcrum consists of a curvature that has the sole of the second arm. 7 - Pince selon l'une des revendications 1 à 5, caractérisée en ce que le second point d'appui est constitué par un bossage prévu dans l'un ou l'autre des premier ou second bras.7 - Clamp according to one of claims 1 to 5, characterized in that the second fulcrum consists of a boss provided in one or the other of the first or second arms. 8 - Pince selon l'une des revendications 1 à 7, caractérisée en ce que le second bras supporte un axe guidé dans des lumières du premier bras et auquel est suspendu un étrier dont le fond s'étend parallèlement à la semelle et présente une encoche coïncidant avec l'encoche prévue dans ladite semelle.8 - Clamp according to one of claims 1 to 7, characterized in that the second arm supports an axis guided in the openings of the first arm and to which hangs a stirrup whose bottom extends parallel to the sole and has a notch coinciding with the notch provided in said sole. 9 - Pince selon l'une des revendications 1 à 8, caractérisée par une pièce portée par le premier bras et empêchant le pivotement de la première semelle.9 - Clamp according to one of claims 1 to 8, characterized by a part carried by the first arm and preventing the pivoting of the first sole. 10 - Pince selon l'une des revendications 1 à 9, caractérisée en ce que les premier et second bras sont réalisés par des feuilles métalliques découpées et pliées pour présenter en section la forme d'un U, ces pièces s'emboîtant l'une dans l'autre.10 - Pliers according to one of claims 1 to 9, characterized in that the first and second arms are made of metal sheets cut and folded to present in section the shape of a U, these parts fitting one in the other. 11 - Pince selon l'une des revendications 1 à 10, caractérisée en ce que la semelle est formée dans une pièce durcie rapportée par des ailes au premier bras auquel elle est fixée par l'axe supportant le ressort tendant à écarter les deux bras.11 - Clamp according to one of claims 1 to 10, characterized in that the sole is formed in a hardened part attached by wings to the first arm to which it is fixed by the axis supporting the spring tending to separate the two arms.
EP85400614A 1984-03-29 1985-03-28 Plug grip for fitting expansion plugs comprising two articulated arms Expired EP0159255B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85400614T ATE30862T1 (en) 1984-03-29 1985-03-28 PLIERS, FOR INSERTING EXPANDABLE DOWELS, WITH TWO SWIVELING HANDLES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8404927 1984-03-29
FR8404927A FR2561971B1 (en) 1984-03-29 1984-03-29 PLIERS FOR LAYING EXPANSION ANKLES COMPRISING TWO ARTICULATED ARMS

Publications (2)

Publication Number Publication Date
EP0159255A1 true EP0159255A1 (en) 1985-10-23
EP0159255B1 EP0159255B1 (en) 1987-11-19

Family

ID=9302600

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85400614A Expired EP0159255B1 (en) 1984-03-29 1985-03-28 Plug grip for fitting expansion plugs comprising two articulated arms

Country Status (5)

Country Link
US (1) US4625538A (en)
EP (1) EP0159255B1 (en)
AT (1) ATE30862T1 (en)
DE (1) DE3560986D1 (en)
FR (1) FR2561971B1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0494747A1 (en) * 1991-01-11 1992-07-15 Emhart Inc. Blind rivet nut with pulling mandrel
EP0922536A1 (en) * 1997-12-12 1999-06-16 Herbert Schruff Method and device for placing rivet nuts
FR2801527A1 (en) * 1999-11-30 2001-06-01 Black & Decker Inc Pincers for fitting expanding metal anchor dowels has body and lever pivoted together on adjustable axis to move driving jaws
FR2924969A1 (en) * 2007-12-17 2009-06-19 Prospection Et D Inventsions T Clamp piece for fixing anchoring plug to hollow material, has reception box moving aside head of screw from bush, where sliding of box is caused by push of handle towards front and towards another handle to move aside case's support surface

Families Citing this family (5)

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Publication number Priority date Publication date Assignee Title
US5050420A (en) * 1990-08-29 1991-09-24 Liu Yang Ting Multi-functional riveter
US5295290A (en) * 1992-07-14 1994-03-22 One Twelve, Inc. Adapter for plastic blind fastener tool
CA2414519A1 (en) * 2001-12-20 2003-06-20 Ipl Inc. Method and apparatus to deform a plastic rivet
US7189243B1 (en) 2004-03-31 2007-03-13 Howmedica Osteonics Corp. Orthopaedic fixation pin extraction
NO20210743A1 (en) * 2021-06-09 2022-09-12 Tor Korshamn Tool for fastening and releasing a wall anchor

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US3831424A (en) * 1973-02-24 1974-08-27 Usm Corp Pliers type blind riveting tool
FR2343564A1 (en) * 1976-03-11 1977-10-07 Brendle Robert THREADED ANKLE INSTALLATION TOOL
FR2354853A1 (en) * 1976-06-17 1978-01-13 Futters London Ltd TOOL FOR PLACING EXPANSIVE ANCHORS

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US2329562A (en) * 1941-12-29 1943-09-14 Arthur J Hilpert Insulator remover
US2530215A (en) * 1947-12-01 1950-11-14 Zidar Anton Upstanding handle for floor shears
US3324700A (en) * 1964-09-21 1967-06-13 United Shoe Machinery Corp Pulling chuck for rivet setting tool

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US3831424A (en) * 1973-02-24 1974-08-27 Usm Corp Pliers type blind riveting tool
FR2343564A1 (en) * 1976-03-11 1977-10-07 Brendle Robert THREADED ANKLE INSTALLATION TOOL
FR2354853A1 (en) * 1976-06-17 1978-01-13 Futters London Ltd TOOL FOR PLACING EXPANSIVE ANCHORS

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0494747A1 (en) * 1991-01-11 1992-07-15 Emhart Inc. Blind rivet nut with pulling mandrel
EP0922536A1 (en) * 1997-12-12 1999-06-16 Herbert Schruff Method and device for placing rivet nuts
US6029332A (en) * 1997-12-12 2000-02-29 Schruff; Herbert Rivet setting tool
US6223409B1 (en) 1997-12-12 2001-05-01 Herbert Schruff Rivet setting tool
FR2801527A1 (en) * 1999-11-30 2001-06-01 Black & Decker Inc Pincers for fitting expanding metal anchor dowels has body and lever pivoted together on adjustable axis to move driving jaws
EP1106306A1 (en) * 1999-11-30 2001-06-13 Black & Decker Inc. Setting tool for expanding wall anchors
US6474129B1 (en) 1999-11-30 2002-11-05 Black & Decker Inc. Setting tool for expanding wall anchors
FR2924969A1 (en) * 2007-12-17 2009-06-19 Prospection Et D Inventsions T Clamp piece for fixing anchoring plug to hollow material, has reception box moving aside head of screw from bush, where sliding of box is caused by push of handle towards front and towards another handle to move aside case's support surface

Also Published As

Publication number Publication date
ATE30862T1 (en) 1987-12-15
EP0159255B1 (en) 1987-11-19
US4625538A (en) 1986-12-02
DE3560986D1 (en) 1987-12-23
FR2561971B1 (en) 1988-10-07
FR2561971A1 (en) 1985-10-04

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