EP0159255B1 - 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
EP0159255B1
EP0159255B1 EP85400614A EP85400614A EP0159255B1 EP 0159255 B1 EP0159255 B1 EP 0159255B1 EP 85400614 A EP85400614 A EP 85400614A EP 85400614 A EP85400614 A EP 85400614A EP 0159255 B1 EP0159255 B1 EP 0159255B1
Authority
EP
European Patent Office
Prior art keywords
arm
plug
arms
grip according
shoe member
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.)
Expired
Application number
EP85400614A
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German (de)
French (fr)
Other versions
EP0159255A1 (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
Priority date (The priority date 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 date listed.)
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 allows, for the above application, to exert firstly a very large force and then a substantially weaker force but over a large stroke, which allows the expansion of the wall plugs in a simple and fast way.
  • FR-A-2 343 564 has made known the preamble of the main claim.
  • 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 invention is therefore characterized in that the second arm is directly connected to the first arm and comprises two successive support points.
  • the clamp according to Figures 1 to 5 comprises a flat sole 1 in which is formed a notch 2, preferably slightly V-shaped which opens for example forward.
  • 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 constituted by a U-shaped profile advantageously forming corrugations 12 near its rear part visible on 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 ribs 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 2 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 1 may be metallic or preferably constituted by a plastic sheath delimiting a stop 15a. Although this is not essential, it is nevertheless advantageous, as illustrated in FIG. 1, to provide a pivoting stand 26 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 Figure 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 bolt 26 in a position for which the sole 1 is applied flat on the underside of the plate 30.
  • the axis 18 By acting on the handle 15, in the direction of the arrow f 1 , the axis 18 is supported in the bottom of the openings 20 thus constituting a first pivot axis of the second arm 14.
  • 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 according to 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 ribs 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 lower cost due to the simplification.
  • FIGS. 9 to 12 illustrate a variant according to which the first arm 10 constituted by a fitting folded in a U shape at its front part of the cheeks 3a projecting from a flat sole 1a.
  • the cheeks support an axis 1 3a 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, opening to 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 folded 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 located between the axis 1 9a 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 21 a.
  • FIG. 9a illustrates a development according to which the first and second arms 10 and 14 are provided with handles 40, 41 of relatively flexible material, for example of plastic, which create an extra thickness and, consequently, reduce the space 42 between the two handles.
  • the space 42 could not be increased to allow gripping of the handles in the same hand and the useful stroke of the pliers not having to be reduced, a boss 43 facing the second arm is formed in the first arm 10.
  • this second arm comes to bear on the boss 43, which increases the useful stroke of the pliers.
  • this would be obtained by forming the boss 43 in the second arm 14, said boss then being directed towards the first arm 10.
  • FIG. 13 illustrates a variant according to 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 in 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 has only 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 dowel being provided by the axis 18, exactly as described with reference to Figures 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 crutch 37 can Obviously be articulated if desired in the same way as it appears in Figure 1.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
  • Mechanically-Actuated Valves (AREA)
  • Fishing Rods (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Sink And Installation For Waste Water (AREA)
  • Walking Sticks, Umbrellas, And Fans (AREA)

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'exercertout 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 allows, for the above application, to exert firstly a very large force and 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 known pliers of this type by patent US-A-3,831,424 and patent FR-A-2,354,853 and patent FR-A-2,343,564.

En particulier, le FR-A-2 343 564 a fait connaître le préambule de la revendication principale.In particular, FR-A-2 343 564 has made known the preamble of the main claim.

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.

L'invention est donc caractérisée en ce que le second bras est directement relié au premier bras et comporte deux points d'appui successifs.The invention is therefore characterized in that the second arm is directly connected to the first arm and comprises two successive support points.

Des formes de réalisation de l'objet de l'invention sont représentées, à titre d'exemples non limitatifs, au dessin annexé.

  • La figure 1 est une élévation latérale partie en coupe d'une pince selon une forme de réalisation de l'invention.
  • La figure 2 est une coupe partielle d'un détail de réalisation de la pince de la figure 1.
  • La figure 3 est une vue de dessus correspondant à la figure 1.
  • La figure 4 est une coupe partielle de la pince de la figure 1 illustrant une position caractéristique de fonctionnement.
  • La figure 5 est une coupe analogue à la figure 4 illustrant une autre position caractéristique de fonctionnement.
  • La figure 6 est une élévation en partie en coupe d'une première variante.
  • La figure 7 est une coupe vue suivant la ligne Vll-VII de la figure 6.
  • La figure 8 est une coupe vue suivant la ligne VIII-VIII de la figure 6.
  • Les figures 9 et 9a sont des élévations en partie en coupe d'une seconde variante selon deux modes de réalisation.
  • La figure 10 est une vue de dessus correspondant à la figure 9.
  • Les figures 11 et 12 sont des coupes-élévations partielles, illustrant deux positions caractéristiques.
  • La figure 13 est une élévation d'une autre variante.
Embodiments of the object of the invention are shown, by way of nonlimiting examples, in the accompanying drawing.
  • Figure 1 is a side elevation in section of a clamp according to an embodiment of the invention.
  • FIG. 2 is a partial section of an embodiment detail of the clamp of FIG. 1.
  • Figure 3 is a top view corresponding to Figure 1.
  • Figure 4 is a partial section of the clamp of Figure 1 illustrating a characteristic operating position.
  • Figure 5 is a section similar to Figure 4 illustrating another characteristic operating position.
  • Figure 6 is an elevation partly in section of a first variant.
  • FIG. 7 is a sectional view taken along line Vll-VII of FIG. 6.
  • FIG. 8 is a section seen along line VIII-VIII of FIG. 6.
  • Figures 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.
  • Figures 11 and 12 are partial sectional elevations, illustrating two characteristic positions.
  • Figure 13 is an elevation of another variant.

La pince selon les figures 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 clamp according to Figures 1 to 5 comprises a flat sole 1 in which is formed a notch 2, preferably slightly V-shaped which opens for example forward.

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 figure 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 constituted by a U-shaped profile advantageously forming corrugations 12 near its rear part visible on 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 côtes 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 ribs 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 2 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 2 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 1 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 figure 1, de prévoir une béquille pivotante 26 formant verrou et articulée sur un axe 28 passé dans le bras 11 à son extrémité arrière.The handle 1 may be metallic or preferably constituted by a plastic sheath delimiting a stop 15a. Although this is not essential, it is nevertheless advantageous, as illustrated in FIG. 1, to provide a pivoting stand 26 forming a lock and articulated on an axis 28 passed through the arm 11 at its rear end.

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 figure 1.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 Figure 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 figure 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 dessous de la plaque 30.The drawing shows that the arm 11 is held by the bolt 26 in a position for which the sole 1 is applied flat on the underside 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 figure 4.By acting on the handle 15, in the direction of the arrow f 1 , the axis 18 is supported in the bottom of the openings 20 thus constituting a first pivot axis of the second arm 14. The distance separating the axis 18 from l 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 f 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'illustre la figure 5.When the second arm 14 has pivoted sufficiently, the upper part 22a of the notch 22 bears against the axis 13. By continuing to exert a force in the direction of arrow f on the second arm 14, the axis of pivoting of the second arm is moved to come to 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 anchors 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 croît 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 anchor increases proportionally without the force to be exerted on the handle 15 being appreciably modified since, initially, the ankle 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 figure 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 example, en acier par découpage et emboutissage d'une plaque métallique, la semelle 1 et une semelle 29a assurant la jonction des côtes 9, 10 et des joues 3, 4 décrits précédemment.FIG. 6 illustrates a variant according to 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 ribs 9, 10 and the cheeks 3, 4 described above.

Comme dans l'exemple des figures 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 in 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 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 figures 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 1a. Les joues supportent un axe 1 3a 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 22, ouvrant vers le haut.FIGS. 9 to 12 illustrate a variant according to which the first arm 10 constituted by a fitting folded in a U shape at its front part of the cheeks 3a projecting from a flat sole 1a. The cheeks support an axis 1 3a 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, opening to 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 1 9a 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 folded 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 located between the axis 1 9a 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 1 a 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 through the notches 2 1 and 36 below the head of a screw and then there is a tendency to bring the two arms 10 and 14 together while keeping the sole 1 flat against the support plate. 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 21 a.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 21 a.

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 figures 1 à 5.The result is therefore analogous to what is described in the foregoing with reference to FIGS. 1 to 5.

La figure 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 suré- paisseur et, par conséquent, réduisent l'espace 42 entre les deux poignées. L'espace 42 ne pouvait pas être augmenté pour permettre la saisie 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 of relatively flexible material, for example of plastic, which create an extra thickness and, consequently, reduce the space 42 between the two handles. The space 42 could not be increased to allow gripping of the handles in the same hand and the useful stroke of the pliers not having to be reduced, a boss 43 facing the second arm is formed in the first arm 10. In this way, after the start of the ankle buckling when the second arm pivots around the curvature 34, this second arm comes to bear on the boss 43, which increases the useful stroke of the pliers. 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 figure 13 illustre une variante selon laquelle la disposition est analogue à celle décrite ci-dessus en référence aux figures 9 à 12.FIG. 13 illustrates a variant according to 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 figures 1 à 5 et on munit également le second bras 14 d'un axe 18 analogue à celui des figures 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 figures 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 figures 1 à 5.However, in this embodiment, the axis 19a is provided with a stirrup 23 identical to that of the embodiment in 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 has only 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 dowel being provided by the axis 18, exactly as described with reference to Figures 1 to 5.

La figure 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 figure 6. La semelle d'appui 29a formée à partirde la béquille fixe 37 peut évidemment être articulée si on le désire de la même manière que cela apparaît à la figure 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 crutch 37 can Obviously be articulated if desired in the same way as it appears in Figure 1.

Claims (11)

1. Plug grip with two bearing points for the positioning of expansion plugs comprising two articulated arms, one of the arms (11) leading to a bearing shoe member (1) and the other arm (14) causing the rising of a screw of an expansion plug, the first bearing point (18-34) giving rise to a great ratio of the lever arms for causing the start of buckling of the expansion plug (31) while the second bearing point (22a, 35) gives rise to a smaller ratio of the lever arms for increasing the distorsion stroke of the expansion plug, characterized in that the second arm (14) is directly connected to the first arm (11) and comprises two successive bearing points (18-22, 34-35, 18-35).
2. Plug grip according to claim 1, characterized in that the first arm comprises a first shoe member (1, 1 a) and a second shoe member (29, 29a) which are in a same plane for preventing the pivoting movement of this first arm during pivoting movement of the second arm (14).
3. Plug grip according to claim 1 or 2, characterized in that the first bearing point is delimited by a spindle (18) carried by the second arm and guided in an aperture (20) in the first arm.
4. Plug grip according to one of the claims 1 to 3, characterized by a spindle ( 13, 13a7 for a pin-shaped spring (26) tending to separate the two arms (10, 14) one from the other, this spindle (13) being carried by the first arm (10) facing a notch (22, 221) of the second arm (14).
5. Plug grip according to one of claims 1 to 4, characterized in that the second bearing point of the second arm is formed by the spindle (13, 13a) on which is wound the pin-shaped spring (26).
6. Plug grip according to one of claims 1 to 4, characterized in that the second bearing point is formed by a curved portion that has the shoe member of the second arm.
7. Plug grip according to one of claims 1 to 5, characterized in that the second bearing point is formed by a boss provided in one or the other of the first or second arms.
8. Plug grip according to one of claims 1 to 7, characterized in that the second arm carries a spindle guided in apertures of the first arm and to which is hanged a stirrup member of which the bottom portion is extended parallelly to the shoe member and has a notch coinciding with the notch provided in said shoe member.
9. Plug grip according to one of claims 1 to 8, characterized by a part carried by the first arm and preventing the pivoting movement of the first shoe member.
10. Plug grip according to one of claims 1 to 9, characterized in that the first and second arms are made of cut and bent metal sheets for having a U-shape in cross-section, these parts being respectively engageable.
11. Plug grip according to one of claims 1 to 10, characterized in that the shoe member is formed in a hardened part connected by wings to the first arm to which it is secured by the spindle carrying 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
FR8404927A FR2561971B1 (en) 1984-03-29 1984-03-29 PLIERS FOR LAYING EXPANSION ANKLES COMPRISING TWO ARTICULATED ARMS
FR8404927 1984-03-29

Publications (2)

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

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5050420A (en) * 1990-08-29 1991-09-24 Liu Yang Ting Multi-functional riveter
DE4100709A1 (en) * 1991-01-11 1992-07-16 Emhart Inc BLIND RIVET NUT WITH TIE PIN
US5295290A (en) * 1992-07-14 1994-03-22 One Twelve, Inc. Adapter for plastic blind fastener tool
EP0922536B1 (en) * 1997-12-12 2003-03-05 Herbert Schruff 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
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
FR2924969B1 (en) * 2007-12-17 2010-05-14 Prospection Et D Inventsions T ANCHORING PLIERS FOR RETRACTABLE AND COMPRESSIBLE SLEEVE ANCHORS
NO346511B1 (en) * 2021-06-09 2022-09-12 Tor Korshamn Tool for fastening and releasing a wall anchor

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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
GB1535099A (en) * 1976-06-17 1978-12-06 Futters Ltd Tools exerting a compressive or tensile force

Also Published As

Publication number Publication date
FR2561971A1 (en) 1985-10-04
FR2561971B1 (en) 1988-10-07
DE3560986D1 (en) 1987-12-23
ATE30862T1 (en) 1987-12-15
EP0159255A1 (en) 1985-10-23
US4625538A (en) 1986-12-02

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