EP2597204A1 - Pivotable clamp for vibrator and vibrator provided with such a clamp - Google Patents

Pivotable clamp for vibrator and vibrator provided with such a clamp Download PDF

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Publication number
EP2597204A1
EP2597204A1 EP12192325.4A EP12192325A EP2597204A1 EP 2597204 A1 EP2597204 A1 EP 2597204A1 EP 12192325 A EP12192325 A EP 12192325A EP 2597204 A1 EP2597204 A1 EP 2597204A1
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EP
European Patent Office
Prior art keywords
clamp
frame
vibrator
jaws
clamp body
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Granted
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EP12192325.4A
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German (de)
French (fr)
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EP2597204B1 (en
Inventor
Mathieu Jehanno
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
    • E02D7/18—Placing by vibrating
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D11/00—Methods or apparatus specially adapted for both placing and removing sheet pile bulkheads, piles, or mould-pipes

Definitions

  • the present invention relates to driving equipment for driving and extracting shaped objects in the ground, including piles, sheet piles, various tubes, and more particularly the vibrators.
  • clamps including hydraulic, which are equipped with these sinking means to grasp the objects to be driven or extracted from the ground.
  • Vibrators are vibrating equipment, comprising one or more pairs of eccentric masses, known as flyweights, rotating at high speed, and in opposite directions, so that the horizontal components of the vibrations cancel each other out, and so that obtain a resultant unidirectional vertical vibration.
  • the eccentrics are arranged in a vibrating housing, itself attached to a suspension bracket suspended from the hook of a hoist.
  • the vibrations generated by the rotation of the eccentric masses are transmitted to the section to drive or tear, and produce a localized fluidization of the soil, which decreases friction and allows to push or tear the profile.
  • the vibrators are also provided with one or more grippers which grip the profile and the transmission of vibrations.
  • the objects to be driven into the ground are generally stored, flat, in an extended position so that it is above all necessary to orient them vertically before being able to drive them into the ground.
  • the vibrators are mounted on a hydraulic shovel which ensures the gripping of the objects to be driven and their driving proper.
  • the vibrating housing is pivotally mounted on the yoke, to allow an orientation of the grippers in a horizontal position, to grasp the objects on the ground, and in a vertical position, which constitutes a working position.
  • the object of the invention is to propose, according to a first aspect, a vibrator capable of ensuring the gripping of shaped articles and their insertion into the ground and this, in a small footprint, and without the need to provide specific human resources to, in particular, implement the step of grasping the objects to be driven.
  • Another object of the invention is to provide, according to a second aspect, a device that can be mounted under a vibrator to allow the latter to grasp an object on the ground.
  • the subject of the invention is therefore a pivoting clamp for a vibrator intended for driving shaped objects into the ground, comprising a frame intended to be fixed on the vibrator, a clamp body comprising means for gripping said object and mounted pivotally relative to the frame between a gripping position of the object and an active working position, and locking means adapted to lock the gripper body in working position on the frame and to transmit the vibrations emitted by the vibrator of said frame audit body.
  • This locking means makes it possible to ensure the transmission of the particularly important centrifugal force, which can reach several hundreds of kN, during the vibration with a virtually zero clearance.
  • the locking means comprise fixed and movable locking jaws, provided one on the frame and the other on the clamp body, and a hydraulic locking cylinder for controlling the relative displacement of said jaws.
  • the fixed jaw is provided on the frame and the movable jaw is provided on the clamp body.
  • the locking cylinder is therefore in turn, advantageously mounted on the clamp body.
  • the jaws comprise active surfaces facing toothed transmitting the efforts of the vibration.
  • At least a portion of the toothed active surfaces of at least one jaw is mounted on a ball joint so as to align the toothed active surfaces in an active working position.
  • the clamp may comprise a jack for controlling the pivoting of the clamp body relative to the frame.
  • This jack for controlling the pivoting of the clamp body can be a linear or rotary jack.
  • the clamp comprises a sensor for detecting the active position of the clamp body, to allow the operation of the vibrator only when the clamp body is in the active working position.
  • the gripping means comprise a set of gripping jaws and a jack for controlling the gripping jaws clamping.
  • a vibrator intended for driving objects into the ground of the type comprising a set of pairs of eccentric masses driven in rotation under the action of motor means and a clamp able to hold an object to sink and transmit vibrations generated by the eccentric masses to said object, said clamp being constituted by a pivoting clamp as defined above.
  • FIG. 1 and 2 there is shown a vibrator according to the invention, respectively in active working position, adopted during the insertion of an object into the ground, and a gripping position of the object on the ground.
  • the vibrator visible on these Figures 1 and 2 , denoted by the general reference numeral 1, and intended for the insertion into the ground of profiled objects, such as sheet piles, H- and I-sections, tubes of various sections, concrete and wooden piles, ..., under the effect of unidirectional vibrations generated during the operation of the vibrator.
  • the vibrator 1 is here mounted at the end of an arm B of a lifting machine, hydraulic shovel type, and comprises stirrup E suspension which is attached a vibrating housing 2 comprising a set of pairs of eccentric masses driven in rotation by a hydraulic motor supplied with hydraulic fluid by a supply circuit C.
  • the vibrating housing 2 comprises two pairs of flyweights M 'and M ", the weights of each pair being driven at the same speed but in the opposite direction so that the horizontal components of the flyweights each pair vanishes and the vertical components add up to generate vertical unidirectional resulting vibrations.
  • the vibrator 1 In order to grip objects buried in the ground and the transmission of vibrations to the latter, the vibrator 1 is provided with a hydraulic clamp 3 illustrated in detail on the figures 3 and 6 .
  • the clamp 3 comprises a frame 4 which is fixed by screwing on the vibrating housing 2 by means of a set of fixing screws V, and a clamp body 5 pivotally mounted on the frame 4.
  • the gripper body comprises a pair of gripping jaws 6a and 6b, one of which, namely the jaw designated by the reference 6b is fixed and the other, 6a, is movable under the action of a hydraulic jack 7 to control the clamping of the jaws.
  • the clamp body 5 can be mounted freely pivotally relative to the frame 4.
  • the clamp body 5 is preferably pivotally mounted relative to the frame 4, under the action of a jack 8 for controlling the pivoting of the clamp body relative to the frame.
  • the jack 8 is here a pivoting cylinder. But one could also, alternatively, provide a linear jack to control the movement of the clamp body 5 relative to the frame 4.
  • the jack 8 is in any case connected to the hydraulic circuit C so as to cause the movement of the clamp between the active working position ( figure 1 ) and the gripping position ( figure 2 ), in particular under the control of joysticks manipulable manually by an operator.
  • the vibrator 1, and in particular the clamp 3 is provided with locking means 9 intended to lock the clamp body 5 in the active working position, and, moreover, to transmit the vibrations emitted by the vibrating housing to the object grasped by the jaws 6a and 6b.
  • these locking means comprise a pair of locking jaws 10a and 10b arranged facing one another and provided on the clamp body 5 and the other on the frame 4.
  • the jaw 10a mounted on the clamp body 5, is movable under the action of a locking cylinder 11 to engage with the other jaw 10b and lock the clamp body 5 in the active position.
  • the other jaw 10b is here fixed and mounted on a support 12.
  • the active surfaces 13a and 13b facing the jaws 10a and 10b are toothed so as to obtain an automatic alignment of the jaws and, consequently, guarantee the positioning of the gripper body 5 in the active position, when tightening locking means 9.
  • the cylinder 11 is mounted in a bore 14 formed in the body 5, with the interposition of a seal 15 and defines therewith a chamber 16 which communicates with the hydraulic circuit C.
  • a ring 17 is mounted on the body 5 to limit the movement of the piston 11 when clamping the jaws 10a and 10b.
  • the movable jaw 10a is mounted on a ball 18.
  • the rear face of the movable jaw 10b has a dome 19, convexity facing the piston 11, and the corresponding face of the piston 11 comprises a corresponding imprint 20 in which comes Dome 19.
  • the movable jaw 10a is set with clearance on the piston 11 by means of a screw 21.
  • the hydraulic clamp 3 is provided with a sensor 22 for detecting the active position of the clamp body 5.
  • an inductive sensor 23, provided here on the fixed jaw 10b and a metal chip 24, which can be detected by the sensor 23, will be used.
  • other types of sensors may also be used. variant.
  • the sensor 22 is intended to detect the active position of the clamp body 5 and to deliver this information to an electronic control circuit of the vibrator in order to allow its operation only when the clamp body 5 is exactly in the active position and the locking means activated, ensuring the positioning of the object held by the jaws 6a and 6b in position to be driven into the ground, that is to say in the direction of the oscillations.
  • the vibrator 1 which has just been described, equipped with a pivoting hydraulic clamp, can be used to grip a sheet pile placed on the ground ( figure 7a ), position it vertically, by urging the control jack 8 so as to move the clamp body 5 of the position from the grip to the active position ( Figures 7b and 7c ) then, after detecting the active position of the clamp body and actuated the locking means 3, to proceed to the depression in the soil of the sheet pile by implementing the vibrating housing 2.
  • the locking means thanks to the use of the jaw tooth surfaces, guarantee an efficient transmission of the vibrations, the fixing of the gripper body carrying the gripping jaws. performing without play on the frame 4.
  • hydraulic clamp which has just been described can be an equipment capable of replacing the conventional clamps equipping conventional vibrators, to facilitate gripping an object to drive.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
  • Manipulator (AREA)

Abstract

The clamp (3) has a frame (4) fixed on a vibrator, and a clamp body (5) comprising object gripping units i.e. gripping jaws (6a, 6b) mounted to pivot with respect to the frame between a gripping position of the object and an active work position. A locking unit (9) i.e. rectilinear tooth, locks the clamp body on the frame in the work position on the frame and transmits vibrations emitted from the vibrator to the body. The locking unit includes fixed and movable bits provided on the frame and the clamp body. A hydraulic locking cylinder i.e. piston, controls relative displacement of the bits. An independent claim is also included for a vibrator for inserting objects into ground.

Description

La présente invention concerne les engins de fonçage destinés à l'enfoncement et à l'extraction d'objets profilés dans le sol, notamment de pieux, de palplanches, de tubes divers, et concerne plus particulièrement les vibrateurs.The present invention relates to driving equipment for driving and extracting shaped objects in the ground, including piles, sheet piles, various tubes, and more particularly the vibrators.

Elle se rapporte plus particulièrement aux pinces, notamment hydrauliques, dont sont dotés ces moyens de fonçage pour saisir les objets à enfoncer ou à extraire du sol.It relates more particularly to the clamps, including hydraulic, which are equipped with these sinking means to grasp the objects to be driven or extracted from the ground.

Les vibrateurs sont des équipements vibrants, comprenant une ou plusieurs paires de masses excentriques, connues sous l'appellation de masselottes, tournant à grande vitesse, et en sens opposé, de sorte que les composantes horizontales des vibrations s'annulent, et de manière à obtenir une vibration résultante verticale unidirectionnelle.Vibrators are vibrating equipment, comprising one or more pairs of eccentric masses, known as flyweights, rotating at high speed, and in opposite directions, so that the horizontal components of the vibrations cancel each other out, and so that obtain a resultant unidirectional vertical vibration.

Les excentriques sont disposées dans un boîtier vibrant, lui-même fixé à un étrier de suspension suspendu au crochet d'un engin de levage.The eccentrics are arranged in a vibrating housing, itself attached to a suspension bracket suspended from the hook of a hoist.

En fonctionnement, les vibrations engendrées par la rotation des masses excentriques sont transmises au profilé à enfoncer ou à arracher, et produisent une fluidification localisée du sol, ce qui diminue la friction et permet d'enfoncer ou d'arracher le profilé.In operation, the vibrations generated by the rotation of the eccentric masses are transmitted to the section to drive or tear, and produce a localized fluidization of the soil, which decreases friction and allows to push or tear the profile.

Les vibrateurs sont par ailleurs dotés d'une ou de plusieurs pinces qui assurent la préhension du profilé et la transmission des vibrations.The vibrators are also provided with one or more grippers which grip the profile and the transmission of vibrations.

Comme on le conçoit, dans les chantiers, les objets à enfoncer dans le sol sont généralement stockés, à plat, dans une position allongée de sorte qu'il est avant tout nécessaire de les orienter verticalement avant de pouvoir les enfoncer dans le sol.As it is conceivable, in building sites, the objects to be driven into the ground are generally stored, flat, in an extended position so that it is above all necessary to orient them vertically before being able to drive them into the ground.

Pour les chantiers de grandes dimensions, on utilise généralement à cet effet un engin spécifique qui assure la préhension des objets au sol et leur orientation en position verticale pour pouvoir être pris en charge par les pinces de préhension.For large construction sites, it is generally used for this purpose a specific device that ensures the gripping of objects on the ground and their orientation in the vertical position to be supported by the grippers.

Pour les chantiers de relativement faibles dimensions, les vibrateurs sont montés sur une pelle hydraulique qui assure la préhension au sol des objets à enfoncer et leur enfoncement proprement dit.For work sites of relatively small dimensions, the vibrators are mounted on a hydraulic shovel which ensures the gripping of the objects to be driven and their driving proper.

Dans ce cas, le boîtier vibrant est monté pivotant sur l'étrier, afin d'autoriser une orientation des pinces de préhension dans une position horizontale, pour saisir les objets au sol, et dans une position verticale, qui constitue une position de travail.In this case, the vibrating housing is pivotally mounted on the yoke, to allow an orientation of the grippers in a horizontal position, to grasp the objects on the ground, and in a vertical position, which constitutes a working position.

On pourra à cet égard se référer aux documents WO 93/07 341 et US 5 568,997 .In this regard, reference may be made to the documents WO 93/07 341 and US 5,568,997 .

Il a toutefois été constaté que le montage pivotant du boîtier vibrant sur l'étrier augmente considérablement l'encombrement et le poids des vibrateurs, encombrement et poids gênants pour la manipulation.It has however been found that the pivoting mounting of the vibrating housing on the caliper greatly increases the size and weight of the vibrators, space and weight troublesome handling.

Au vu de ce qui précède, le but que se propose d'atteindre l'invention est de proposer, selon un premier aspect, un vibrateur, capable d'assurer la saisie d'objets profilés et leur enfoncement dans le sol et ce, dans un encombrement réduit, et sans nécessiter de prévoir des moyens humains spécifiques pour, notamment, mettre en oeuvre l'étape de saisie des objets à enfoncer.In view of the foregoing, the object of the invention is to propose, according to a first aspect, a vibrator capable of ensuring the gripping of shaped articles and their insertion into the ground and this, in a small footprint, and without the need to provide specific human resources to, in particular, implement the step of grasping the objects to be driven.

Un autre but de l'invention est de proposer, selon un deuxième aspect, un équipement venant se monter sous un vibrateur afin de permettre à ce dernier de saisir un objet au sol.Another object of the invention is to provide, according to a second aspect, a device that can be mounted under a vibrator to allow the latter to grasp an object on the ground.

L'invention a donc pour objet une pince pivotante pour vibrateur destiné à l'enfoncement d'objets profilés dans le sol, comprenant un bâti destiné à venir se fixer sur le vibrateur, un corps de pince comportant des moyens de préhension dudit objet et monté de manière pivotante par rapport au bâti entre une position de préhension de l'objet et une position active de travail, et des moyens de verrouillage aptes à verrouiller le corps de pince en position de travail sur le bâti et à transmettre les vibrations émises par le vibrateur dudit bâti audit corps.The subject of the invention is therefore a pivoting clamp for a vibrator intended for driving shaped objects into the ground, comprising a frame intended to be fixed on the vibrator, a clamp body comprising means for gripping said object and mounted pivotally relative to the frame between a gripping position of the object and an active working position, and locking means adapted to lock the gripper body in working position on the frame and to transmit the vibrations emitted by the vibrator of said frame audit body.

Ce moyen de verrouillage permet d'assurer la transmission de la force centrifuge particulièrement importante, pouvant atteindre plusieurs centaines de kN, durant la vibration avec un jeu quasi-nul.This locking means makes it possible to ensure the transmission of the particularly important centrifugal force, which can reach several hundreds of kN, during the vibration with a virtually zero clearance.

Selon une autre caractéristique, les moyens de verrouillage comportent des mors de verrouillage fixe et mobile, prévus l'un sur le bâti et l'autre sur le corps de pince, et un vérin hydraulique de verrouillage destiné à commander le déplacement relatif desdits mors.According to another characteristic, the locking means comprise fixed and movable locking jaws, provided one on the frame and the other on the clamp body, and a hydraulic locking cylinder for controlling the relative displacement of said jaws.

Par exemple, le mors fixe est prévu sur le bâti et le mors mobile est prévu sur le corps de pince.For example, the fixed jaw is provided on the frame and the movable jaw is provided on the clamp body.

Le vérin de verrouillage est donc quant à lui, avantageusement monté sur le corps de pince.The locking cylinder is therefore in turn, advantageously mounted on the clamp body.

Selon encore une autre caractéristique de la pince, les mors comportent des surfaces actives en regard dentées transmettant les efforts de la vibration.According to yet another characteristic of the clamp, the jaws comprise active surfaces facing toothed transmitting the efforts of the vibration.

De préférence, au moins une partie des surfaces actives dentées de l'un au moins des mors est montée sur rotule de manière à aligner au serrage les surfaces actives dentées en position active de travail.Preferably, at least a portion of the toothed active surfaces of at least one jaw is mounted on a ball joint so as to align the toothed active surfaces in an active working position.

La pince peut comporter un vérin de commande du pivotement du corps de pince par rapport au bâti.The clamp may comprise a jack for controlling the pivoting of the clamp body relative to the frame.

Ce vérin de commande du pivotement du corps de pince peut être un vérin linéaire ou rotatif.This jack for controlling the pivoting of the clamp body can be a linear or rotary jack.

De préférence, la pince comporte un capteur de détection de la position active du corps de pince, pour n'autoriser le fonctionnement du vibrateur que lorsque le corps de pince est en position active de travail.Preferably, the clamp comprises a sensor for detecting the active position of the clamp body, to allow the operation of the vibrator only when the clamp body is in the active working position.

Selon encore une autre caractéristique, les moyens de préhension comportent un ensemble de mâchoires de préhension et un vérin de commande du serrage des mâchoires de préhension.According to yet another characteristic, the gripping means comprise a set of gripping jaws and a jack for controlling the gripping jaws clamping.

L'invention a également pour objet, selon un autre aspect, un vibrateur destiné à l'enfoncement d'objets dans le sol, du type comprenant un ensemble de paires de masses excentriques entraînées en rotation sous l'action de moyens moteurs et une pince apte à maintenir un objet à enfoncer et à transmettre les vibrations engendrées par les masses excentriques audit objet, ladite pince étant constituée par une pince pivotante telle que définie ci-dessus.Another subject of the invention is, according to another aspect, a vibrator intended for driving objects into the ground, of the type comprising a set of pairs of eccentric masses driven in rotation under the action of motor means and a clamp able to hold an object to sink and transmit vibrations generated by the eccentric masses to said object, said clamp being constituted by a pivoting clamp as defined above.

D'autres buts, caractéristiques et avantages de l'invention apparaîtront à la lecture de la description suivante, donnée uniquement à titre d'exemple non limitatif, et faite en référence aux dessins annexés sur lesquels :

  • les figures 1 et 2 montrent un vibrateur doté d'une pince pivotante conforme à l'invention, respectivement en position de travail et en position de préhension d'un objet ;
  • la figure 3 est une vue de détail, à plus grande échelle, de la pince de vibrateur des figures 1 et 2 ;
  • la figure 4 est une vue en coupe d'un détail de la pince de la figure 3, montrant les mors de verrouillage de la pince ;
  • la figure 5 illustre les surfaces actives dentées des mors de la figure 4 ;
  • la figure 6 est une vue en coupe partielle de la pince de la figure 3, montrant les mâchoires et le vérin de préhension ; et
  • les figures 7a, 7b, 7c et 7d illustrent le fonctionnement d'un vibrateur doté d'une pince pivotante conforme à l'invention.
Other objects, features and advantages of the invention will appear on reading the following description, given solely by way of nonlimiting example, and with reference to the appended drawings in which:
  • the Figures 1 and 2 show a vibrator provided with a pivoting clamp according to the invention, respectively in the working position and in the gripping position of an object;
  • the figure 3 is a detail view, on a larger scale, of the vibrator clamp of the Figures 1 and 2 ;
  • the figure 4 is a sectional view of a detail of the clip of the figure 3 , showing the clamping jaws of the clamp;
  • the figure 5 illustrates the toothed active surfaces of the jaws of the figure 4 ;
  • the figure 6 is a partial sectional view of the forceps of the figure 3 , showing the jaws and the gripping cylinder; and
  • the Figures 7a, 7b, 7c and 7d illustrate the operation of a vibrator with a pivoting clamp according to the invention.

Sur les figures 1 et 2, on a représenté un vibrateur conforme à l'invention, respectivement en position active de travail, adoptée lors de l'enfoncement d'un objet dans le sol, et une position de préhension de cet objet au sol.On the Figures 1 and 2 , there is shown a vibrator according to the invention, respectively in active working position, adopted during the insertion of an object into the ground, and a gripping position of the object on the ground.

Le vibrateur visible sur ces figures 1 et 2, désigné par la référence numérique générale 1, et destiné à l'enfoncement dans le sol d'objets profilés, de type palplanches, profilés en H et I, tubes de diverses sections, pieux en béton et en bois, ..., sous l'effet de vibrations unidirectionnelles engendrées lors du fonctionnement du vibrateur.The vibrator visible on these Figures 1 and 2 , denoted by the general reference numeral 1, and intended for the insertion into the ground of profiled objects, such as sheet piles, H- and I-sections, tubes of various sections, concrete and wooden piles, ..., under the effect of unidirectional vibrations generated during the operation of the vibrator.

Comme on le voit sur ces figures, le vibrateur 1 est ici monté à l'extrémité d'un bras B d'un engin de levage, de type pelle hydraulique, et comporte étrier E de suspension auquel est fixé un boîtier vibrant 2 comprenant un ensemble de paires de masses excentriques entraînées en rotation par un moteur hydraulique alimenté en fluide hydraulique par un circuit d'alimentation C.As seen in these figures, the vibrator 1 is here mounted at the end of an arm B of a lifting machine, hydraulic shovel type, and comprises stirrup E suspension which is attached a vibrating housing 2 comprising a set of pairs of eccentric masses driven in rotation by a hydraulic motor supplied with hydraulic fluid by a supply circuit C.

Dans l'exemple de réalisation représenté sur ces figures, le boîtier vibrant 2 comprend deux paires de masselottes M' et M", les masselottes de chaque paire étant entraînées à une même vitesse mais en sens inverse de sorte que les composantes horizontales des masselottes de chaque paire s'annulent et que les composantes verticales s'additionnent de manière à engendrer des vibrations résultantes unidirectionnelles verticales.In the embodiment shown in these figures, the vibrating housing 2 comprises two pairs of flyweights M 'and M ", the weights of each pair being driven at the same speed but in the opposite direction so that the horizontal components of the flyweights each pair vanishes and the vertical components add up to generate vertical unidirectional resulting vibrations.

Dans le but d'assurer la préhension des objets enfoncés dans le sol ainsi que la transmission des vibrations à ces derniers, le vibrateur 1 est pourvu d'une pince hydraulique 3 illustrée en détail sur les figures 3 et 6.In order to grip objects buried in the ground and the transmission of vibrations to the latter, the vibrator 1 is provided with a hydraulic clamp 3 illustrated in detail on the figures 3 and 6 .

Comme on le voit sur ces figures 3 et 6, la pince 3 comporte un bâti 4 venant se fixer par vissage sur le boîtier vibrant 2 au moyen d'un ensemble de vis de fixation V, et un corps de pince 5 monté pivotant sur le bâti 4.As we see on these figures 3 and 6 , the clamp 3 comprises a frame 4 which is fixed by screwing on the vibrating housing 2 by means of a set of fixing screws V, and a clamp body 5 pivotally mounted on the frame 4.

Le corps de pince comporte une paire de mâchoires 6a et 6b de préhension, dont l'une, à savoir la mâchoire désignée par la référence 6b est fixe et dont l'autre, 6a, est mobile sous l'action d'un vérin hydraulique 7 de commande du serrage des mâchoires.The gripper body comprises a pair of gripping jaws 6a and 6b, one of which, namely the jaw designated by the reference 6b is fixed and the other, 6a, is movable under the action of a hydraulic jack 7 to control the clamping of the jaws.

Dans divers modes de réalisation, le corps de pince 5 peut être monté librement pivotant par rapport au bâti 4.In various embodiments, the clamp body 5 can be mounted freely pivotally relative to the frame 4.

Toutefois, le corps de pince 5 est de préférence monté pivotant par rapport au bâti 4, sous l'action d'un vérin 8 de commande du pivotement du corps de pince par rapport au bâti. Le vérin 8 est ici un vérin pivotant. Mais on pourrait également, en variante, prévoir un vérin linéaire pour commander le déplacement du corps de pince 5 par rapport au bâti 4.However, the clamp body 5 is preferably pivotally mounted relative to the frame 4, under the action of a jack 8 for controlling the pivoting of the clamp body relative to the frame. The jack 8 is here a pivoting cylinder. But one could also, alternatively, provide a linear jack to control the movement of the clamp body 5 relative to the frame 4.

Le vérin 8 est en tout état de cause raccordé au circuit C hydraulique de manière à provoquer le déplacement de la pince entre la position active de travail (figure 1) et la position de préhension (figure 2), notamment sous le contrôle de manettes de commande manipulables manuellement par un opérateur.The jack 8 is in any case connected to the hydraulic circuit C so as to cause the movement of the clamp between the active working position ( figure 1 ) and the gripping position ( figure 2 ), in particular under the control of joysticks manipulable manually by an operator.

Tel est également le cas du vérin 7 de commande du serrage des mâchoires, également alimenté en fluide hydraulique par le circuit C pour provoquer le serrage des mâchoires 6a et 6b.This is also the case of the jack 7 for controlling the clamping of the jaws, also supplied with hydraulic fluid by the circuit C to cause the clamping of the jaws 6a and 6b.

En se référant également à la figure 4, on voit que le vibrateur 1, et en particulier la pince 3, est doté de moyens de verrouillage 9 destinés à verrouiller le corps de pince 5 en position active de travail, et, en outre, à transmettre les vibrations émises par le boîtier vibrant à l'objet saisi par les mâchoires 6a et 6b.Referring also to the figure 4 it can be seen that the vibrator 1, and in particular the clamp 3, is provided with locking means 9 intended to lock the clamp body 5 in the active working position, and, moreover, to transmit the vibrations emitted by the vibrating housing to the object grasped by the jaws 6a and 6b.

Comme on le voit, ces moyens de verrouillage comprennent une paire de mors de verrouillage 10a et 10b disposés en regard l'un de l'autre et prévus l'un sur le corps de pince 5 et l'autre sur le bâti 4.As can be seen, these locking means comprise a pair of locking jaws 10a and 10b arranged facing one another and provided on the clamp body 5 and the other on the frame 4.

Le mors 10a, monté sur le corps de pince 5, est mobile sous l'action d'un vérin de verrouillage 11 pour venir en prise avec l'autre mors 10b et verrouiller le corps de pince 5 en position active. L'autre mors 10b est ici fixe et monté sur un support 12.The jaw 10a, mounted on the clamp body 5, is movable under the action of a locking cylinder 11 to engage with the other jaw 10b and lock the clamp body 5 in the active position. The other jaw 10b is here fixed and mounted on a support 12.

Comme on le voit, les surfaces actives 13a et 13b en regard des mors 10a et 10b sont dentées de manière à obtenir un alignement automatique des mors et, par conséquent, garantir le positionnement du corps de pince 5 en position active, lors du serrage des moyens de verrouillage 9.As can be seen, the active surfaces 13a and 13b facing the jaws 10a and 10b are toothed so as to obtain an automatic alignment of the jaws and, consequently, guarantee the positioning of the gripper body 5 in the active position, when tightening locking means 9.

Il s'agit par exemple de dentures rectilignes qui s'étendent selon une direction parallèle à l'axe de pivotement du corps de pince 5. Il a été constaté que des dentures délimitant des rampes latérales permettaient de garantir le positionnement du corps de pince 5 en position active (figure 5).This is for example rectilinear toothings which extend in a direction parallel to the axis of pivoting of the clamp body 5. It has been found that teeth delimiting lateral ramps made it possible to guarantee the positioning of the clamp body 5 in active position ( figure 5 ).

On voit par ailleurs, sur la figure 4, que le vérin 11 est monté dans un alésage 14 pratiqué dans le corps 5, avec interposition d'un joint d'étanchéité 15 et délimite avec celui-ci une chambre 16 qui communique avec le circuit hydraulique C.We also see, on the figure 4 , that the cylinder 11 is mounted in a bore 14 formed in the body 5, with the interposition of a seal 15 and defines therewith a chamber 16 which communicates with the hydraulic circuit C.

Une bague 17 est montée sur le corps 5 pour limiter le déplacement du piston 11 lors du serrage des mors 10a et 10b.A ring 17 is mounted on the body 5 to limit the movement of the piston 11 when clamping the jaws 10a and 10b.

On voit enfin sur la figure 4 que le mors mobile 10a est monté sur une rotule 18. En effet, la face postérieure du mors mobile 10b comporte un dôme 19, à convexité tournée vers le piston 11, et la face correspondante du piston 11 comporte une empreinte correspondante 20 dans laquelle vient se loger le dôme 19. En outre, le mors mobile 10a est fixé avec jeu sur le piston 11 au moyen d'une vis 21.We finally see on the figure 4 that the movable jaw 10a is mounted on a ball 18. In fact, the rear face of the movable jaw 10b has a dome 19, convexity facing the piston 11, and the corresponding face of the piston 11 comprises a corresponding imprint 20 in which comes Dome 19. In addition, the movable jaw 10a is set with clearance on the piston 11 by means of a screw 21.

Ainsi, grâce au montage du mors mobile 10a avec jeu sur le piston 11, on garantit la coopération des surfaces dentées 13a et 13b des mors 10a et 10b.Thus, by mounting the movable jaw 10a with play on the piston 11, it ensures the cooperation of the toothed surfaces 13a and 13b jaws 10a and 10b.

On notera toutefois que dans le mode de réalisation décrit en référence à la figure 4, seul l'un des mors 10a est monté sur rotule. On notera toutefois que l'on ne sort pas du cadre de l'invention lorsque les deux mors 10a et 10b sont montés sur rotule.Note, however, that in the embodiment described with reference to the figure 4 only one of the jaws 10a is mounted on a ball joint. Note however that it is not beyond the scope of the invention when the two jaws 10a and 10b are mounted on a ball.

On voit enfin sur la figure 4 que la pince hydraulique 3 est dotée d'un capteur 22 de détection de la position active du corps de pince 5.We finally see on the figure 4 that the hydraulic clamp 3 is provided with a sensor 22 for detecting the active position of the clamp body 5.

On utilisera, par exemple, un capteur inductif 23, prévu ici sur le mors fixe 10b et une pastille 24, métallique, apte à être détectée par le capteur 23. Toutefois, bien entendu, d'autres types de capteurs peuvent également être utilisés en variante.For example, an inductive sensor 23, provided here on the fixed jaw 10b and a metal chip 24, which can be detected by the sensor 23, will be used. However, of course, other types of sensors may also be used. variant.

Le capteur 22 est destiné à détecter la position active du corps de pince 5 et à délivrer cette information à un circuit électronique de commande du vibrateur afin de n'autoriser son fonctionnement que lorsque le corps de pince 5 se situe exactement en position active et les moyens de verrouillage activés, garantissant le positionnement de l'objet maintenu par les mâchoires 6a et 6b en position d'être enfoncé dans le sol, c'est-à-dire dans la direction des oscillations.The sensor 22 is intended to detect the active position of the clamp body 5 and to deliver this information to an electronic control circuit of the vibrator in order to allow its operation only when the clamp body 5 is exactly in the active position and the locking means activated, ensuring the positioning of the object held by the jaws 6a and 6b in position to be driven into the ground, that is to say in the direction of the oscillations.

En se référant enfin aux figures 7a à 7d, on voit que le vibrateur 1 qui vient d'être décrit, doté d'une pince hydraulique pivotante, peut être utilisé pour saisir une palplanche posée au sol (figure 7a), la positionner verticalement, en sollicitant le vérin de commande 8 de manière à déplacer le corps de pince 5 de la position de préhension à la position active (figures 7b et 7c) puis, après avoir détecté la position active du corps de pince et actionné les moyens de verrouillage 3, pour procéder à l'enfoncement dans le sol de la palplanche en mettant en oeuvre le boîtier vibrant 2.Referring finally to Figures 7a to 7d it can be seen that the vibrator 1 which has just been described, equipped with a pivoting hydraulic clamp, can be used to grip a sheet pile placed on the ground ( figure 7a ), position it vertically, by urging the control jack 8 so as to move the clamp body 5 of the position from the grip to the active position ( Figures 7b and 7c ) then, after detecting the active position of the clamp body and actuated the locking means 3, to proceed to the depression in the soil of the sheet pile by implementing the vibrating housing 2.

En particulier, lors de l'enfoncement de la palplanche dans le sol, les moyens de verrouillage, grâce à l'utilisation des surfaces dentées des mors, garantissent une transmission efficace des vibrations, la fixation du corps de pince portant les mâchoires de préhension s'effectuant sans jeu sur le bâti 4.In particular, during the driving of the sheet pile into the ground, the locking means, thanks to the use of the jaw tooth surfaces, guarantee an efficient transmission of the vibrations, the fixing of the gripper body carrying the gripping jaws. performing without play on the frame 4.

On notera par ailleurs que la pince hydraulique qui vient d'être décrite peut constituer un équipement capable de remplacer les pinces conventionnelles équipant les vibrateurs conventionnels, pour faciliter la préhension d'un objet à enfoncer.Note also that the hydraulic clamp which has just been described can be an equipment capable of replacing the conventional clamps equipping conventional vibrators, to facilitate gripping an object to drive.

Claims (11)

Pince pivotante pour vibrateur destiné à l'enfoncement d'objets profilés dans le sol, caractérisée en ce qu'elle comporte un bâti (4) destiné à venir se fixer sur le vibrateur, un corps de pince (5) comportant des moyens de préhension (6a, 6b) dudit objet et monté de manière pivotante par rapport au bâti entre une position de préhension de l'objet et une position active de travail, et des moyens de verrouillage (9) aptes à verrouiller le corps de pince (5) en position de travail sur le bâti (4) et à transmettre les vibrations émises par le vibrateur du bâti audit corps.Swivel clamp for vibrator for driving shaped objects into the ground, characterized in that it comprises a frame (4) intended to be fixed on the vibrator, a clamp body (5) comprising gripping means (6a, 6b) of said object and pivotally mounted relative to the frame between a gripping position of the object and an active working position, and locking means (9) adapted to lock the gripper body (5) in the working position on the frame (4) and to transmit the vibrations emitted by the vibrator of the frame to said body. Pince selon la revendication 1, caractérisée en ce que les moyens de verrouillage (9) comportent des mors (10a, 10b) de verrouillage fixe et mobile prévus l'un sur le bâti (4) et l'autre sur le corps de pince (5) et un vérin hydraulique (11) de verrouillage, destiné à commander le déplacement relatif desdits mors (10a, 10b).Gripper according to Claim 1, characterized in that the locking means (9) comprise fixed and movable locking jaws (10a, 10b) provided on the frame (4) and on the clamp body (4). 5) and a hydraulic cylinder (11) for locking, intended to control the relative movement of said jaws (10a, 10b). Pince selon la revendication 2, caractérisée en ce que le mors fixe (10b) est prévu sur le bâti et le mors mobile (10a) est prévu sur le corps de pince (5).Gripper according to claim 2, characterized in that the fixed jaw (10b) is provided on the frame and the movable jaw (10a) is provided on the clamp body (5). Pince selon la revendication 3, caractérisée en ce que le vérin de verrouillage (11) est prévu sur le corps de pince (5).Gripper according to claim 3, characterized in that the locking cylinder (11) is provided on the clamp body (5). Pince selon l'une quelconque des revendications 2 à 4, caractérisée en ce que les mors (10a, 10b) comportent des surfaces actives (13a, 13b) en regard dentées, transmettant les efforts de la vibration.Gripper according to any one of claims 2 to 4, characterized in that the jaws (10a, 10b) have active surfaces (13a, 13b) facing teeth, transmitting the forces of vibration. Pince selon l'une quelconque des revendications 2 à 5, caractérisée en ce qu'au moins une partie des surfaces actives dentées (13a, 13b) de l'un au moins des mors est montée sur rotule de manière à aligner au serrage les surfaces actives dentées en position active de travail.Gripper according to one of Claims 2 to 5, characterized in that at least a portion of the toothed active surfaces (13a, 13b) of at least one of the jaws is mounted on a ball joint so as to align the surfaces active toothed in active working position. Pince selon l'une quelconque des revendications 1 à 6, caractérisée en ce qu'elle comporte un vérin (8) de commande du pivotement du corps de pince par rapport au bâti.Clamp according to any one of claims 1 to 6, characterized in that it comprises a jack (8) for controlling the pivoting of the clamp body relative to the frame. Pince selon la revendication 7, caractérisée en ce que le vérin de commande du pivotement du corps de pince est un vérin linéaire ou rotatif.Gripper according to claim 7, characterized in that the control cylinder for pivoting the gripper body is a linear or rotary cylinder. Pince selon l'une quelconque des revendications 1 à 8, caractérisée en ce qu'elle comporte un capteur (22) de détection de la position active du corps de pince pour n'autoriser le fonctionnement du vibrateur que lorsque le corps de pince est en position active de travail.Clamp according to any one of claims 1 to 8, characterized in that it comprises a sensor (22) for detecting the active position of the clamp body to allow the operation of the vibrator only when the clamp body is in position. active working position. Pince selon l'une quelconque des revendications 1 à 9, caractérisée en ce que les moyens de préhension comportent un ensemble de mâchoires (6a, 6b) de préhension et un vérin (7) de commande du serrage des mâchoires de préhension.Gripper according to any one of claims 1 to 9, characterized in that the gripping means comprise a set of jaws (6a, 6b) for gripping and a jack (7) for controlling the clamping of the gripping jaws. Vibrateur, destiné à l'enfoncement d'objets dans le sol, du type comprenant un ensemble de paires de masses excentriques entraînées en rotation sous l'action de moyens moteurs et une pince apte à maintenir un objet enfoncé et à transmettre les vibrations engendrées par les masses excentriques audit objet, caractérisé en ce qu'il comporte une pince pivotante selon l'une quelconque des revendications 1 à 10.Vibrator, for driving objects into the ground, of the type comprising a set of pairs of eccentric masses driven in rotation under the action of motor means and a clamp adapted to hold a depressed object and to transmit the vibrations generated by the eccentric masses to said object, characterized in that it comprises a pivoting clamp according to any one of claims 1 to 10.
EP20120192325 2011-11-22 2012-11-13 Pivotable clamp for vibrator and vibrator provided with such a clamp Not-in-force EP2597204B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1160652A FR2982888B1 (en) 2011-11-22 2011-11-22 SWIVEL CLAMP FOR VIBRATOR AND VIBRATOR HAVING SUCH A CLAMP

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EP2597204A1 true EP2597204A1 (en) 2013-05-29
EP2597204B1 EP2597204B1 (en) 2015-01-07

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3032729A1 (en) * 2015-02-18 2016-08-19 P T C VIBRATOR FORCEPS WITH CROSS-BUTTONS AND VIBRATOR HAVING SUCH A CLAMP
WO2017018951A1 (en) 2015-07-29 2017-02-02 Ozkan Aydin A gripping machine
NL2030443B1 (en) * 2022-01-06 2023-07-11 Dieseko Group B V Vibratory pile driving apparatus

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0496167A1 (en) * 1991-01-24 1992-07-29 Kencho Kobe Co., Ltd. Vibrating pile driver
WO1993007341A1 (en) 1991-09-30 1993-04-15 Raunisto, Airi Method and apparatus for forcing piles into or out of the ground
EP1192318A1 (en) * 1999-06-14 2002-04-03 Expotech Limited A device for driving piles

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0496167A1 (en) * 1991-01-24 1992-07-29 Kencho Kobe Co., Ltd. Vibrating pile driver
WO1993007341A1 (en) 1991-09-30 1993-04-15 Raunisto, Airi Method and apparatus for forcing piles into or out of the ground
US5568997A (en) 1991-09-30 1996-10-29 Raunisto Airi Method and apparatus for forcing piles into or out of the ground
EP1192318A1 (en) * 1999-06-14 2002-04-03 Expotech Limited A device for driving piles

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3032729A1 (en) * 2015-02-18 2016-08-19 P T C VIBRATOR FORCEPS WITH CROSS-BUTTONS AND VIBRATOR HAVING SUCH A CLAMP
EP3059349A1 (en) * 2015-02-18 2016-08-24 P T C Clamp for vibrator with transverse jaws and vibrator provided with such a clamp
WO2017018951A1 (en) 2015-07-29 2017-02-02 Ozkan Aydin A gripping machine
CN107709670A (en) * 2015-07-29 2018-02-16 艾丁·奥兹康 Gripper
RU2673681C1 (en) * 2015-07-29 2018-11-29 Айдин ОЗКАН Gripper
CN107709670B (en) * 2015-07-29 2019-08-02 艾丁·奥兹康 Gripper
NL2030443B1 (en) * 2022-01-06 2023-07-11 Dieseko Group B V Vibratory pile driving apparatus
WO2023131623A1 (en) * 2022-01-06 2023-07-13 Dieseko Group B.V. Vibratory pile driving apparatus

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EP2597204B1 (en) 2015-01-07
FR2982888A1 (en) 2013-05-24

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