EP4269316A1 - Lifting clamp for closed panels - Google Patents

Lifting clamp for closed panels Download PDF

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Publication number
EP4269316A1
EP4269316A1 EP23170874.4A EP23170874A EP4269316A1 EP 4269316 A1 EP4269316 A1 EP 4269316A1 EP 23170874 A EP23170874 A EP 23170874A EP 4269316 A1 EP4269316 A1 EP 4269316A1
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EP
European Patent Office
Prior art keywords
jaw element
jaw
lifting clamp
clamping
lifting
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.)
Pending
Application number
EP23170874.4A
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German (de)
French (fr)
Inventor
Georges Antoine Cerca
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Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP4269316A1 publication Critical patent/EP4269316A1/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
    • B66C1/42—Gripping members engaging only the external or internal surfaces of the articles
    • B66C1/44—Gripping members engaging only the external or internal surfaces of the articles and applying frictional forces
    • B66C1/442—Gripping members engaging only the external or internal surfaces of the articles and applying frictional forces actuated by lifting force

Definitions

  • the invention relates to the field of lifting and handling, and is particularly suitable for construction panels used in the building sector.
  • Wooden frame constructions are currently experiencing significant growth given their ecological, insulation and cost qualities.
  • the implementation of wooden frame constructions has introduced new working methods in the building sector.
  • construction elements which were previously produced directly on site by assembling bricks, concrete blocks, shuttered walls, etc., are now prepared outside the site, in carpentry workshops.
  • Semi-finished panels comprising a structure, joinery, and possible insulation are thus assembled at a first production site and are then delivered and installed on the site for final assembly, before carrying out the finishing touches to the construction.
  • the lifting and handling of the panels is currently generally carried out in the traditional manner by slinging elements directly attached to the panels (straps, hooks, etc.). This involves positioning these elements beforehand, with a certain cost in terms of material and production time. In addition, these elements are difficult to move on the panels, and the associated processes are therefore not very adaptable, particularly when the center of gravity of the panel is moved by the addition or removal of constituents. Hanging and unhooking the panels as part of a sling requires numerous manipulations, and often the presence of an operator near the place of installation. in place and the removal of slings, which may make it necessary to use baskets, ladders, etc. further increasing the cost and hazards of installation, in addition to the security problems which may then arise.
  • the invention aims to improve the lifting clamps of the prior art.
  • the invention relates to a lifting clamp for closed panels, adapted to grip a panel by tightening in a tightening direction, and conforming to claim 1.
  • the lifting clamp according to the invention allows the lifting and handling of closed panels, that is to say panels which only have lateral faces for gripping. These panels are opposed to panels with an accessible structure, which can be grasped by their structure.
  • closed panels are typically residential partitions which have been prepared with two side panels between which are the panel structure, its insulation, etc.
  • the lifting clamp according to the invention makes it possible to grasp such a panel by gripping it by its two opposite side faces, with a view to lifting it in a direction which extends parallel to the planes of these side faces.
  • the lifting clamp Despite being gripped on two parallel planes, the lifting clamp exerts a proportionate tightening of the panel, calibrated by its own weight, guaranteeing both the good holding of the panel in the clamp and the preservation of the panel from any crushing or punching.
  • the lifting clamp according to the invention requires very little manipulation on the part of an operator, while guaranteeing the required safety in holding the panel during lifting.
  • the lifting clamp also allows simple repositioning of the lifting point, by releasing the tensile force of the sling, and repositioning the clamp before lifting again.
  • the lifting clamp according to the invention may include the additional characteristics of the secondary claims, alone or in combination.
  • THE figures 1 to 3 illustrate a lifting clamp 1 according to the invention, in the process of lifting a panel 2, from different perspectives.
  • a panel 2 is common in the field of wooden frame constructions, it is a semi-finished panel whose two walls have been mounted on a wooden frame.
  • the dimensions of these panels are generally around 2.5 to 3 meters high, with a depth of around ten centimeters.
  • the lifting clamp 1 makes it possible to manipulate the panel 2 by tightening a pair of jaws 5 on its two lateral faces 3, 4, in a tightening direction 36.
  • the expression "the tightening direction » designates the direction in which the two jaws 5 are brought together during tightening, and any direction which is parallel to it.
  • the lifting clamp 1 comprises a first jaw element 6 carrying one of the jaws 5, and a second jaw element 7 carrying the other jaw 5.
  • the two jaw elements 6, 7 are independent of each other and are only mechanically connected by the combination of a pivot connection and a slide connection, and by a flexible cable 8 on which the traction force is exerted by a sling 9 connected to a gantry, a crane, or any other lifting element.
  • the flexible cable 8 is made by a strap with low elongation.
  • the lifting clamp comprises a slinging element 10 hooking the flexible cable 8 for its connection with the sling 9.
  • this slinging element 10 is a pulley.
  • Each jaw element 6, 7 is made up of two flanges 6A, 6B, 7A, 7B made of cut steel sheets and braced by axes or pulleys.
  • the bodies 13, 16 extend substantially in the clamping direction 36, it being understood that they can oscillate a few degrees around this direction, because the jaw elements 6, 7 have a degree of freedom in rotation one by one. relative to the other (this rotation participating in the tightening function together with a translation).
  • the two jaws 5 are each attached by a pivot connection 15 to the corresponding clamping head, so that the jaw 5 has a degree of freedom in rotation to match the shape of the panel to be clamped.
  • the jaw of the first jaw element is fully visible, it being understood that the jaw of the second jaw element is identical and arranged in the same way.
  • the second jaw element 7 is connected (here by its clamping head 17) to the body 13 of the first jaw element 6 following a pivot connection around a clamping axis 19.
  • the clamping axis 19 extends along a direction substantially perpendicular to the tightening direction 36 and is movable along a slide 11 extending on the body 13 of the first jaw element 6.
  • the slide 11 extends substantially along the longitudinal direction of the body 13, it that is to say substantially along the tightening direction 36.
  • the first jaw element 6 and the second jaw element 7 are thus connected by a combination of pivot connection and slide connection, because the clamping axis 19, around which the two elements 6, 7 can rotate relative to each other to the other, is itself movable along the slide 11.
  • this combination of connections is produced by a shaft fixed on the clamping head 17 of the second jaw element and projecting transversely to pass through an opening groove 18 made in the body 13 of the first jaw element 6 .
  • each flange 6A, 6B of the first jaw element 6 has a groove 18, and a shaft is fixed on each flange 7A, 7B of the second jaw element while projecting through one of the grooves 18.
  • the second jaw element 7 has a thickness (i.e. in the present example: a spacing between the two flanges 7A, 7B) which is less than the thickness of the first jaw element 6 (i.e. that is to say at the spacing between the two flanges 6A, 6B) so that the second jaw element 7 can be inserted into the first jaw element 6, which allows the clamping head 17 of the second jaw element 7 to be inserted transversely through the body 13 of the first jaw element 6.
  • the lifting clamp 1 further comprises a release lever 20 making it possible to separate the two jaws 5 by moving the two clamping axes 19 along the slide 11, that is to say, in the present example, in moving the two shafts along the grooves 18.
  • the release lever 20 comprises a bar 37, one of the ends of which is in pivotal connection with the first jaw element 6 along an axis 21, and the other end of which forms a handle provided with a remote control attachment 24
  • the remote control attachment 24 is here formed by a hook for attaching a remote control cable.
  • the release lever 20 further comprises a link 23, one of the ends of which is attached by a pivot connection of axis 22 to the bar 37, and the other end of which is in pivot connection to the clamping axis 19.
  • the release lever 20 is movable between a tightening position (that illustrated in figures 1 to 3 ) in which the axis 22 is away from the straight line passing through the axis 21 and the clamping axis 19, so that the rimpedement of these two axes 19, 21 is possible under the effect of traction on the flexible cable 8. And a loosening position in which the loosening lever 20 is lowered in order to move the clamping axis 19 away from the axis 21, which leads to a manual spacing of the jaws 5.
  • the lever loosening 20 can also include a stable position in which the axis 22 is aligned on the right between the tightening axis 19 and the axis 21, corresponding to a position of maximum spacing of the jaws 5.
  • the lifting clamp 1 further comprises an elastic tensioner 25 which is here produced by an elastically deformable cable which is stretched between an attachment point 26 on an edge of one of the jaws 5, and an attachment point on a edge the other jaw 5. In its path, the elastic tensioner 25 bypasses the axis 21 then bypasses the clamping axis 19. The elastic tensioner 25 is thus tensioned by exerting a restoring force on the one hand on the two jaws 5 , and on the other hand on the two axes 19, 21.
  • an elastic tensioner 25 which is here produced by an elastically deformable cable which is stretched between an attachment point 26 on an edge of one of the jaws 5, and an attachment point on a edge the other jaw 5.
  • the elastic tensioner 25 bypasses the axis 21 then bypasses the clamping axis 19.
  • the elastic tensioner 25 is thus tensioned by exerting a restoring force on the one hand on the two jaws 5 , and on the other hand on the two axes 19, 21.
  • FIG. 3 illustrates the arrangement of the jaw 5 of the first jaw element 6, with a pivot connection of axis 15 attaching it to the clamping head 14, and the attachment of the elastic tensioner 25 to the attachment point 26 located here on an upper edge of jaw 5.
  • FIG. 4 is a sectional view illustrating the path of the flexible cable 8 within the lifting clamp 1. This figure represents only one of the two flanges constituting each jaw element 6, 7 and the path of the flexible cable 8 within the different pulleys.
  • the lifting clamp 1 comprises at least two fixed axes for connecting the two ends of the flexible cable 8, and at least one pulley on the first jaw element 6 and one pulley on the second jaw element 7.
  • the fixed axes and pulleys are arranged as indicated below.
  • FIG 4 shows how the first jaw element 6 and the second jaw element 7 are interlocked such that the clamping head 17 of the second jaw element 7 is inserted into the body 13 of the first jaw element 6, substantially perpendicular to the latter .
  • the view of the figure 4 further shows a drilling 33 in the clamping head 17 of the second jaw element 7, allowing the fixing of the clamping axis 19 which passes through the groove 18.
  • the two fixed axes 27, 29 are thus located on the first jaw element 6 and the pulleys 28, 30, 31, 32 allow the two clamping heads 14, 17 (and therefore the two jaws 5) to be brought together when a traction on the flexible cable 8 is exerted.
  • the arrangement of the flexible cable 8 makes it possible, when pulling on this flexible cable 8, to bring the pulleys 31 and 32 closer to the pulley 28, therefore bringing the clamping heads 14, 17 closer together.
  • Traction on the flexible cable 8 is carried out via the pulley forming the slinging element 10, which allows on the one hand to balance and center the effort for vertical lifting of the panel, and to reel the lifting cable, thereby increasing the lifting force and applying this increased force to the tightening of the jaws 5.
  • the jaws 5 are sized in terms of their surface area, so as not to damage the panel given its resistance to punching and its weight.
  • the jaws 5 include a low friction coating, such as an elastomer, to increase the hold by a gripping effect in addition to the tightening.
  • the lifting clamp 1 thus allows optimal installation and holding of the panel with little risk of error in a few operations.
  • the release lever 20 is first lowered into the release position.
  • the lifting clamp 1 is then placed on the panel 2 so that the jaws 5 come opposite the side faces 3, 4.
  • the release lever 20 is then released, so that the elastic tensioner 25 biases the clamping axis 19 towards the axis 21 and comes to pre-tighten the jaws 5 on the panel 2.
  • the elastic tensioner 25 also has the other function of maintaining the jaws 5 substantially parallel to the lateral faces 3, 4, avoiding the collapse of the jaws 5 around their respective pivot connection 15.
  • the lifting clamp 1 holds alone on the panel 2 and the slinging operations can begin, the lifting clamp 1 already being in its lifting position on the panel although the traction of the sling has not not yet started. Also at this point, the lifting clamp 1 is easily repositioned if necessary, by manipulating the release lever 20.
  • slinging begins with the implementation of a pull of the sling 9 on the slinging element 10, which results in a pull on the double strand of the flexible cable 8 then a rimpedement of the two clamping heads 14, 17 and therefore a tightening of the jaws 5 against the side faces 3, 4 of the panel 2. Tightening takes place first of all, followed by lifting, without operator intervention.
  • the removal of the lifting clamp 1 is carried out by releasing the traction of the sling 9, and by operating the release lever 20 downwards, directly by hand when the lifting clamp is accessible to the operator.
  • the release lever 20 is actuated with a remote control cable connected to the attachment 24 and accessible from the level of the ground.
  • THE figures 5 to 8 illustrate a lifting clamp 1 according to a second embodiment of the invention.
  • all the elements of the lifting clamp are identical to the first embodiment (in particular the first jaw element 6, the second jaw element 7, and the flexible cable 8) except the release lever 20 which presents a variation here.
  • the flexible cable 8, which has the same arrangement as in the first embodiment, has not been shown in these figures.
  • the release lever 20 comprises symmetrical elements arranged on either side of the jaw elements 6, 7 (see Figure 5 ).
  • the release lever 20 comprises a bar 37, one of the ends of which is in pivotal connection with the second jaw element 7, via the clamping axis 19.
  • This end of the bar 37 is rotatably mounted on the clamping pin 19 (which is attached to the second jaw element 7 and which passes through the groove 18), with a sheave 38 adapted to receive a tensioner 25 (see first embodiment, Figure 3 ).
  • the bars 37 each have a second end which are connected together by a crosspiece 39.
  • the crosspiece 39 can form a handle for actuating the release lever 20 and comprises in addition fixing means 40 intended to receive a pulley (illustrated only on the figures 7 and 8 ).
  • the release lever 20 further comprises a link 23 on each side of the jaw elements 6, 7.
  • Each link 23 has one end connected by a pivot connection of axis 22 to one of the bars 37, and has another end in pivot connection with the first jaw element 6.
  • This connection between the end of each link 23 and the first jaw element 6 is produced by a pivot 51 also carrying with a sheave 38 (for the tensioner 25, not shown on the figures 5 to 8 ) and a locking spacer 48.
  • Actuating the crosspiece 39 downwards causes the clamping pin 19 to slide in the groove 18 and the jaws 5 to move apart.
  • the release lever 20 further comprises a lock 42 rotatably mounted on the bars 37 along a pivot 43.
  • the lock 42 is formed of two cheeks 44 arranged on either side of the jaw elements 6, 7.
  • the cheeks 44 are connected by a crosspiece 45 and each include a hook 49 adapted to hook the corresponding locking spacer 48.
  • the crosspiece 45 of the lock 42 receives a fixing 46 provided for one end of the remote control cable 47.
  • FIGS 7 and 8 illustrate the lifting clamp 1 with its pulley 41 mounted on the crosspiece 39 and its remote control cable 47 placed in this pulley 41 and the end of which is fixed on the crosspiece 45 of the lock 42.
  • Figure 7 illustrates the open position of the lifting clamp 1 (the jaws 5 being spread as far apart as possible), in the unlocked configuration.
  • figure 8 illustrates the open position of lifting clamp 1, in locked configuration.
  • the lifting clamp is locked and unlocked in two stages.
  • the opening and locking operations of the lifting clamp 1 are carried out as indicated below. These operations are carried out when the lifting of the load is completed, and it is planned to unhook the lifting clamp 1 from the panel, the latter then being held by other elements (for example when mounting the panel in its structure is finished).
  • an operator or a device for actuating the remote control cable 47
  • first pulls on the remote control cable 47 which has the effect of bringing the lock 42 as close as possible towards the bars 37, then to actuate the bars 37 downwards, which ultimately leads to a movement of the clamping axis 19 and a spacing of the jaws 5.
  • the tension on the remote control cable 47 is then released, which has the effect of releasing the lock 42.
  • the latter then comes to be placed by gravity in the locking position of the figure 8 , the hooks 49 coming to hook the locking spacers 48.
  • the lifting clamp 1 is thus in locking configuration and is thus held in the open position, it can then be extracted from the load, keeping its open position.
  • the lifting clamp 1 can be placed in position to lift a load again, by framing the load by the two jaws 5. Traction is then exerted on the remote control cable 47, to reach the position of the Figure 7 and put the lock 42 in the unlocked position.
  • the load can then be lifted by activating the crane means which will lift the sling, which will put the flexible cable 8 in tension, causing the two jaws 5 to come together until the load is optimally tightened, then lifting the load.
  • the lifting clamp 1 guarantees high operational safety, imperative in this field, and this for a very wide possible clamping range.
  • the lifting clamp 1 is suitable for clamping thicknesses between 3 and 300 mm, for a load of up to three tonnes, that is to say a maximum grip thickness one hundred times greater than l minimum setting thickness.
  • the same lifting clamp 1 is thus adapted to all possible thicknesses to be lifted on a conventional site, for example of wooden frame construction, making tedious and expensive clamp changes unnecessary.
  • FIG. 9 illustrates the lifting clamp 1 (in this example, according to the second embodiment) in the process of lifting a very thin beam 50. Note that the flexible cable 8 passes between the cheeks 44 of the lock 42 and between the bars 37 of the release lever 20, so that in this position the flexible cable 8 keeps the release lever 20 and the lock 42 in the air .
  • the construction of the jaw elements 6, 7 may be different from the structure in flanges described, as long as these elements allow the clamping head 17 of the second jaw element 7 to pass through the first jaw element 6. This crossing can be done through the middle or the sides of the first jaw element 6.
  • the number of pulleys can be modified to obtain a different number of strands of the flexible cable 8 moving back and forth between the jaw elements 6,7, so as to modify the tightening ratio as a function of the weight lifted.
  • the clamping force can be increased by replacing the fixed axis 29 with a pulley around which the flexible cable 8 is returned to a new fixed axis which is fixed on the clamping head 17 of the second jaw element 7.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
  • Load-Engaging Elements For Cranes (AREA)

Abstract

Pince de levage pour panneaux fermés, comportant :- un premier élément de mâchoire (6) comportant : un corps (13) ; une tête de serrage (14) ; et un mors (5) ;- un deuxième élément de mâchoire (7) comportant : un corps (16) ; une tête de serrage (17) ; et un mors (5) ;- un câble souple (8) ;le deuxième élément de mâchoire (7) étant relié au premier élément de mâchoire (6) suivant une liaison pivot autour d'un axe de serrage (19), et qui est mobile le long d'une glissière (11) s'étendant sur le corps (13) du premier élément de mâchoire (6).Lifting clamp for closed panels, comprising: - a first jaw element (6) comprising: a body (13); a clamping head (14); and a jaw (5); - a second jaw element (7) comprising: a body (16); a clamping head (17); and a jaw (5);- a flexible cable (8); the second jaw element (7) being connected to the first jaw element (6) following a pivot connection around a clamping axis (19), and which is movable along a slide (11) extending over the body (13) of the first jaw element (6).

Description

DOMAINE TECHNIQUETECHNICAL AREA

L'invention concerne le domaine du levage et de la manutention, et est particulièrement adaptée pour les panneaux de construction employés dans le domaine du bâtiment.The invention relates to the field of lifting and handling, and is particularly suitable for construction panels used in the building sector.

Les constructions à ossature bois connaissent actuellement un important essor compte tenu de leurs qualités écologiques, d'isolation et de cout. La mise en oeuvre des constructions à ossature bois a introduit de nouvelles méthodes de travail dans le domaine du bâtiment. Notamment, des éléments de construction qui autrefois étaient produits directement sur place par l'assemblage de briques, parpaings, murs banchés, etc., sont maintenant préparés en dehors du chantier, dans des ateliers de menuiserie. Des panneaux semi-finis comportant une structure, des menuiseries, et un éventuel isolant sont ainsi assemblés sur un premier lieu de production et sont ensuite livrés et installés sur le chantier pour l'assemblage final, avant de réaliser les finitions de la construction.Wooden frame constructions are currently experiencing significant growth given their ecological, insulation and cost qualities. The implementation of wooden frame constructions has introduced new working methods in the building sector. In particular, construction elements which were previously produced directly on site by assembling bricks, concrete blocks, shuttered walls, etc., are now prepared outside the site, in carpentry workshops. Semi-finished panels comprising a structure, joinery, and possible insulation are thus assembled at a first production site and are then delivered and installed on the site for final assembly, before carrying out the finishing touches to the construction.

Ces nouvelles méthodes de construction entrainent de nouveaux besoins dans la manipulation des panneaux, aussi bien sur leur lieu de production que pour leur installation sur chantier.These new construction methods lead to new needs in the handling of panels, both at their place of production and for their installation on site.

ART ANTÉRIEURPRIOR ART

Le levage et la manutention des panneaux sont actuellement réalisés généralement de manière traditionnelle par des éléments d'élingage directement rapportés sur les panneaux (sangles, crochets, etc.). Ceci implique de positionner au préalable ces éléments, avec un certain cout en matériel et en temps de production. De plus, ces éléments sont difficilement déplaçables sur les panneaux, et les procédés associés sont donc peu adaptables, notamment quand le centre de gravité du panneau est déplacé par l'ajout ou le retrait de constituants. L'accrochage et le décrochage des panneaux dans le cadre d'un élingage exigent de nombreuses manipulations, et souvent la présence d'un opérateur à proximité du lieu de la mise en place et du retrait des élingues, ce qui peut rendre nécessaire l'emploi de nacelles, échelles, etc. augmentant encore le cout et les aléas de la pose, en surcroit des problèmes de sécurité qui peuvent alors se poser.The lifting and handling of the panels is currently generally carried out in the traditional manner by slinging elements directly attached to the panels (straps, hooks, etc.). This involves positioning these elements beforehand, with a certain cost in terms of material and production time. In addition, these elements are difficult to move on the panels, and the associated processes are therefore not very adaptable, particularly when the center of gravity of the panel is moved by the addition or removal of constituents. Hanging and unhooking the panels as part of a sling requires numerous manipulations, and often the presence of an operator near the place of installation. in place and the removal of slings, which may make it necessary to use baskets, ladders, etc. further increasing the cost and hazards of installation, in addition to the security problems which may then arise.

EXPOSÉ DE L'INVENTIONSTATEMENT OF THE INVENTION

L'invention a pour but d'améliorer les pinces de levage de l'art antérieur.The invention aims to improve the lifting clamps of the prior art.

À cet effet, l'invention vise une pince de levage pour panneaux fermés, adaptée à saisir un panneau par serrage suivant une direction de serrage, et conforme à la revendication 1.To this end, the invention relates to a lifting clamp for closed panels, adapted to grip a panel by tightening in a tightening direction, and conforming to claim 1.

La pince de levage selon l'invention permet le levage et la manutention de panneaux fermés, c'est-à-dire de panneaux qui ne présentent, pour leur saisie, que des faces latérales. Ces panneaux s'opposent en cela aux panneaux à structure accessible, qui peuvent être saisis par leur structure.The lifting clamp according to the invention allows the lifting and handling of closed panels, that is to say panels which only have lateral faces for gripping. These panels are opposed to panels with an accessible structure, which can be grasped by their structure.

Dans le domaine des constructions à ossature bois, les panneaux fermés sont typiquement des cloisons d'habitation qui ont été préparées avec deux panneaux latéraux entre lesquels se trouvent la structure du panneau, son isolant, etc.In the field of timber frame construction, closed panels are typically residential partitions which have been prepared with two side panels between which are the panel structure, its insulation, etc.

La pince de levage selon l'invention permet de saisir un tel panneau en le serrant par ses deux faces latérales opposées, en vue de procéder à son levage suivant une direction qui s'étend parallèlement aux plans de ces faces latérales.The lifting clamp according to the invention makes it possible to grasp such a panel by gripping it by its two opposite side faces, with a view to lifting it in a direction which extends parallel to the planes of these side faces.

Malgré une saisie sur deux plans parallèles, la pince de levage exerce un serrage proportionné du panneau, calibré par son propre poids, en garantissant aussi bien la bonne tenue du panneau dans la pince que la préservation du panneau de tout écrasement ou poinçonnement.Despite being gripped on two parallel planes, the lifting clamp exerts a proportionate tightening of the panel, calibrated by its own weight, guaranteeing both the good holding of the panel in the clamp and the preservation of the panel from any crushing or punching.

La pince de levage selon l'invention requiert très peu de manipulation de la part d'un opérateur, tout en garantissant la sureté requise dans le maintien du panneau lors du levage.The lifting clamp according to the invention requires very little manipulation on the part of an operator, while guaranteeing the required safety in holding the panel during lifting.

La manipulation requise pour la mise en oeuvre de la pince de levage est extrêmement réduite, il suffit pour l'opérateur de positionner la pince de levage sur le panneau puis de procéder directement au levage. Le serrage et la mise en position de la pince se faisant ensuite automatiquement.The handling required for implementing the lifting clamp is extremely reduced; the operator simply needs to position the lifting clamp on the panel then proceed directly to lifting. The tightening and positioning of the clamp then takes place automatically.

La pince de levage permet de plus un repositionnement du point de levage simple, en relâchant l'effort de traction de l'élingage, et en repositionnant la pince avant de procéder à nouveau au levage.The lifting clamp also allows simple repositioning of the lifting point, by releasing the tensile force of the sling, and repositioning the clamp before lifting again.

Une fois l'opération de levage terminée et le panneau mis en place, le retrait de la pince est réalisé de manière facilitée, également avec peu de manipulation, et peut être optionnellement commandé à distance.Once the lifting operation is completed and the panel is in place, the removal of the clamp is carried out easily, also with little handling, and can optionally be controlled remotely.

La pince de levage selon l'invention peut comporter les caractéristiques additionnelles des revendications secondaires, seules ou en combinaison.The lifting clamp according to the invention may include the additional characteristics of the secondary claims, alone or in combination.

PRÉSENTATION DES FIGURESPRESENTATION OF FIGURES

D'autres caractéristiques et avantages de l'invention ressortiront de la description non limitative qui suit, en référence aux dessins annexés dans lesquels :

  • la figure 1 est une vue en perspective de face d'une pince de levage selon l'invention ;
  • la figure 2 est une vue selon une autre perspective de la pince de levage ;
  • la figure 3 est une vue en perspective de côté de la pince de levage ;
  • la figure 4 est une vue de l'intérieur de la pince de levage ;
  • la figure 5 et la figure 6 sont des vues en perspective d'une pince de levage selon un deuxième mode de réalisation de l'invention ;
  • les figures 7 et 8 sont des vues de face de la pince de levage des figures 5 et 6, pour deux configurations différentes.
Other characteristics and advantages of the invention will emerge from the non-limiting description which follows, with reference to the appended drawings in which:
  • there figure 1 is a front perspective view of a lifting clamp according to the invention;
  • there figure 2 is a view from another perspective of the lifting clamp;
  • there Figure 3 is a side perspective view of the lifting clamp;
  • there Figure 4 is a view of the inside of the lifting clamp;
  • there Figure 5 and the Figure 6 are perspective views of a lifting clamp according to a second embodiment of the invention;
  • THE figures 7 and 8 are front views of the lifting clamp of the figures 5 And 6 , for two different configurations.

Les éléments similaires et communs aux divers modes de réalisation portent les mêmes numéros de renvoi aux figures.Elements similar and common to the various embodiments bear the same reference numbers in the figures.

DESCRIPTION DÉTAILLÉEDETAILED DESCRIPTION

Les figures 1 à 3 illustrent une pince 1 de levage selon l'invention, en cours de levage d'un panneau 2, suivant différentes perspectives. Un tel panneau 2 est courant dans le domaine des constructions à ossature bois, il s'agit d'un panneau semi-fini dont les deux parois ont été montées sur une ossature bois. Les dimensions de ces panneaux sont en général de l'ordre de 2,5 à 3 mètres de haut, avec une profondeur de l'ordre d'une dizaine de centimètres.THE figures 1 to 3 illustrate a lifting clamp 1 according to the invention, in the process of lifting a panel 2, from different perspectives. Such a panel 2 is common in the field of wooden frame constructions, it is a semi-finished panel whose two walls have been mounted on a wooden frame. The dimensions of these panels are generally around 2.5 to 3 meters high, with a depth of around ten centimeters.

La pince de levage 1 permet de manipuler le panneau 2 par le serrage d'une paire de mors 5 sur ses deux faces latérales 3, 4, suivant une direction de serrage 36. Dans la présente demande, l'expression « la direction de serrage » désigne la direction dans laquelle les deux mors 5 sont rapprochés l'un de l'autre lors du serrage, et toute direction qui lui est parallèle.The lifting clamp 1 makes it possible to manipulate the panel 2 by tightening a pair of jaws 5 on its two lateral faces 3, 4, in a tightening direction 36. In the present application, the expression "the tightening direction » designates the direction in which the two jaws 5 are brought together during tightening, and any direction which is parallel to it.

La pince de levage 1 comporte un premier élément de mâchoire 6 portant l'un des mors 5, et un deuxième élément de mâchoire 7 portant l'autre mors 5.The lifting clamp 1 comprises a first jaw element 6 carrying one of the jaws 5, and a second jaw element 7 carrying the other jaw 5.

Les deux éléments de mâchoire 6, 7 sont indépendants l'un de l'autre et ne sont mécaniquement reliés que par la combinaison d'une liaison pivot et d'une liaison glissière, et par un câble souple 8 sur lequel la force de traction est exercée par une élingue 9 reliée à un portique, une grue, ou tout autre élément de levage. Dans le présent exemple, le câble souple 8 est réalisé par une sangle à faible allongement.The two jaw elements 6, 7 are independent of each other and are only mechanically connected by the combination of a pivot connection and a slide connection, and by a flexible cable 8 on which the traction force is exerted by a sling 9 connected to a gantry, a crane, or any other lifting element. In the present example, the flexible cable 8 is made by a strap with low elongation.

La pince de levage comporte un élément d'élingage 10 accrochant le câble souple 8 pour sa liaison avec l'élingue 9. Dans le présent exemple, cet élément d'élingage 10 est une poulie.The lifting clamp comprises a slinging element 10 hooking the flexible cable 8 for its connection with the sling 9. In the present example, this slinging element 10 is a pulley.

Chaque élément de mâchoire 6, 7 est constitué de deux flasques 6A, 6B, 7A, 7B en tôles d'acier découpées et entretoisées par des axes ou des poulies.Each jaw element 6, 7 is made up of two flanges 6A, 6B, 7A, 7B made of cut steel sheets and braced by axes or pulleys.

Le premier élément de mâchoire 6 comporte :

  • un corps 13 s'étendant sensiblement suivant la direction de serrage 36 ;
  • une tête de serrage 14 s'étendant sensiblement perpendiculairement par rapport au corps 13, à une extrémité du corps 13, et portant le mors 5 ;
  • un pied de rattachement 12 s'étendant sensiblement perpendiculairement au corps 13, à l'autre extrémité du corps 13, et dans un sens opposé par rapport à la tête de serrage 14.
The first jaw element 6 comprises:
  • a body 13 extending substantially in the tightening direction 36;
  • a clamping head 14 extending substantially perpendicular to the body 13, at one end of the body 13, and carrying the jaw 5;
  • a connecting foot 12 extending substantially perpendicular to the body 13, at the other end of the body 13, and in an opposite direction relative to the clamping head 14.

Le deuxième élément de mâchoire 7 comporte :

  • un corps 16 s'étendant sensiblement suivant la direction de serrage 36 ;
  • une tête de serrage 17 s'étendant sensiblement perpendiculairement par rapport au corps 16, à une extrémité du corps 16, et portant le mors 5.
The second jaw element 7 comprises:
  • a body 16 extending substantially in the tightening direction 36;
  • a clamping head 17 extending substantially perpendicular to the body 16, at one end of the body 16, and carrying the jaw 5.

Les corps 13, 16 s'étendent sensiblement suivant la direction de serrage 36, étant entendu qu'ils peuvent osciller de quelques degrés autour de cette direction, car les éléments de mâchoire 6, 7 ont un degré de liberté en rotation l'un par rapport à l'autre (cette rotation participant à la fonction de serrage conjointement à une translation).The bodies 13, 16 extend substantially in the clamping direction 36, it being understood that they can oscillate a few degrees around this direction, because the jaw elements 6, 7 have a degree of freedom in rotation one by one. relative to the other (this rotation participating in the tightening function together with a translation).

Les deux mors 5 sont rattachés chacun par une liaison pivot 15 à la tête de serrage correspondante, de sorte que le mors 5 présente un degré de liberté en rotation pour épouser la forme du panneau à serrer. Sur les figures, seul le mors du premier élément de mâchoire est entièrement visible, étant entendu que le mors du deuxième élément de mâchoire est identique et agencé de la même manière.The two jaws 5 are each attached by a pivot connection 15 to the corresponding clamping head, so that the jaw 5 has a degree of freedom in rotation to match the shape of the panel to be clamped. In the figures, only the jaw of the first jaw element is fully visible, it being understood that the jaw of the second jaw element is identical and arranged in the same way.

Le deuxième élément de mâchoire 7 est relié (ici par sa tête de serrage 17) au corps 13 du premier élément de mâchoire 6 suivant une liaison pivot autour d'un axe de serrage 19. L'axe de serrage 19 s'étend suivant une direction sensiblement perpendiculaire à la direction de serrage 36 et est mobile le long d'une glissière 11 s'étendant sur le corps 13 du premier élément de mâchoire 6. La glissière 11 s'étend sensiblement suivant la direction longitudinale du corps 13, c'est-à-dire sensiblement suivant la direction de serrage 36.The second jaw element 7 is connected (here by its clamping head 17) to the body 13 of the first jaw element 6 following a pivot connection around a clamping axis 19. The clamping axis 19 extends along a direction substantially perpendicular to the tightening direction 36 and is movable along a slide 11 extending on the body 13 of the first jaw element 6. The slide 11 extends substantially along the longitudinal direction of the body 13, it that is to say substantially along the tightening direction 36.

Le premier élément de mâchoire 6 et le deuxième élément de mâchoire 7 sont ainsi reliés par une combinaison de liaison pivot et de liaison glissière, car l'axe de serrage 19, autour duquel les deux éléments 6, 7 peuvent tourner l'un par rapport à l'autre, est lui-même mobile le long de la glissière 11.The first jaw element 6 and the second jaw element 7 are thus connected by a combination of pivot connection and slide connection, because the clamping axis 19, around which the two elements 6, 7 can rotate relative to each other to the other, is itself movable along the slide 11.

Dans le présent exemple, cette combinaison de liaisons est réalisée par un arbre fixé sur la tête de serrage 17 du deuxième élément de mâchoire et saillant transversalement pour passer au travers d'une rainure 18 débouchante pratiquée dans le corps 13 du premier élément de mâchoire 6.In the present example, this combination of connections is produced by a shaft fixed on the clamping head 17 of the second jaw element and projecting transversely to pass through an opening groove 18 made in the body 13 of the first jaw element 6 .

Compte tenu de la construction du présent exemple, en deux flasques 6A, 6B, 7A, 7B pour chacun des éléments de mâchoire 6, 7, chaque flasque 6A, 6B du premier élément de mâchoire 6 comporte une rainure 18, et un arbre est fixé sur chaque flasque 7A, 7B du deuxième élément de mâchoire en étant saillant par l'une des rainures 18.Taking into account the construction of the present example, in two flanges 6A, 6B, 7A, 7B for each of the jaw elements 6, 7, each flange 6A, 6B of the first jaw element 6 has a groove 18, and a shaft is fixed on each flange 7A, 7B of the second jaw element while projecting through one of the grooves 18.

Le deuxième élément de mâchoire 7 présente une épaisseur (c'est-à-dire dans le présent exemple : un écartement entre les deux flasques 7A, 7B) qui est inférieure à l'épaisseur du premier élément de mâchoire 6 (c'est-à-dire à l'écartement entre les deux flasques 6A, 6B) de sorte que le deuxième élément de mâchoire 7 puisse s'insérer dans le premier élément de mâchoire 6, ce qui permet à la tête de serrage 17 du deuxième élément de mâchoire 7 d'être insérée transversalement à travers le corps 13 du premier élément de mâchoire 6.The second jaw element 7 has a thickness (i.e. in the present example: a spacing between the two flanges 7A, 7B) which is less than the thickness of the first jaw element 6 (i.e. that is to say at the spacing between the two flanges 6A, 6B) so that the second jaw element 7 can be inserted into the first jaw element 6, which allows the clamping head 17 of the second jaw element 7 to be inserted transversely through the body 13 of the first jaw element 6.

La pince de levage 1 comporte de plus un levier de desserrage 20 permettant d'écarter les deux mors 5 en déplaçant les deux axes de serrage 19 le long de la glissière 11, c'est-à-dire, dans le présent exemple, en déplaçant les deux arbres le long des rainures 18.The lifting clamp 1 further comprises a release lever 20 making it possible to separate the two jaws 5 by moving the two clamping axes 19 along the slide 11, that is to say, in the present example, in moving the two shafts along the grooves 18.

Le levier de desserrage 20 comporte une barre 37 dont l'une des extrémités est en liaison pivot avec le premier élément de mâchoire 6 suivant un axe 21, et dont l'autre extrémité forme une poignée munie d'une attache de commande à distance 24. L'attache de commande à distance 24 est ici formée par un crochet permettant d'attacher un câble de commande à distance.The release lever 20 comprises a bar 37, one of the ends of which is in pivotal connection with the first jaw element 6 along an axis 21, and the other end of which forms a handle provided with a remote control attachment 24 The remote control attachment 24 is here formed by a hook for attaching a remote control cable.

Le levier de desserrage 20 comporte de plus une biellette 23 dont l'une des extrémités est rattachée par une liaison pivot d'axe 22 à la barre 37, et dont l'autre extrémité est en liaison pivot sur l'axe de serrage 19.The release lever 20 further comprises a link 23, one of the ends of which is attached by a pivot connection of axis 22 to the bar 37, and the other end of which is in pivot connection to the clamping axis 19.

Le levier de desserrage 20 est mobile entre une position de serrage (celle illustrée aux figures 1 à 3) dans laquelle l'axe 22 est à l'écart de la droite passant par l'axe 21 et l'axe de serrage 19, de sorte que le rapprochement de ces deux axes 19, 21 est possible sous l'effet de la traction sur le câble souple 8. Et une position de desserrage dans laquelle le levier de desserrage 20 est abaissé en vue d'écarter l'axe de serrage 19 de l'axe 21, ce qui conduit à un écartement manuel des mors 5. Le levier de desserrage 20 peut de plus comporter une position stable dans laquelle l'axe 22 est aligné sur la droite entre l'axe de serrage 19 et l'axe 21, correspondant à une position d'écartement maximal des mors 5.The release lever 20 is movable between a tightening position (that illustrated in figures 1 to 3 ) in which the axis 22 is away from the straight line passing through the axis 21 and the clamping axis 19, so that the rapprochement of these two axes 19, 21 is possible under the effect of traction on the flexible cable 8. And a loosening position in which the loosening lever 20 is lowered in order to move the clamping axis 19 away from the axis 21, which leads to a manual spacing of the jaws 5. The lever loosening 20 can also include a stable position in which the axis 22 is aligned on the right between the tightening axis 19 and the axis 21, corresponding to a position of maximum spacing of the jaws 5.

La pince de levage 1 comporte de plus un tendeur élastique 25 qui est ici réalisé par un câble élastiquement déformable qui est tendu entre un point d'accroche 26 sur un bord de l'un des mors 5, et un point d'accroche sur un bord de l'autre mors 5. Dans son cheminement, le tendeur élastique 25 contourne l'axe 21 puis contourne l'axe de serrage 19. Le tendeur élastique 25 est ainsi tendu en exerçant un effort de rappel d'une part sur les deux mors 5, et d'autre part sur les deux axes 19, 21.The lifting clamp 1 further comprises an elastic tensioner 25 which is here produced by an elastically deformable cable which is stretched between an attachment point 26 on an edge of one of the jaws 5, and an attachment point on a edge the other jaw 5. In its path, the elastic tensioner 25 bypasses the axis 21 then bypasses the clamping axis 19. The elastic tensioner 25 is thus tensioned by exerting a restoring force on the one hand on the two jaws 5 , and on the other hand on the two axes 19, 21.

La figure 3 illustre l'agencement du mors 5 du premier élément de mâchoire 6, avec une liaison pivot d'axe 15 le rattachant la tête de serrage 14, et le rattachement du tendeur élastique 25 sur le point d'accroche 26 situé ici sur un bord supérieur du mors 5.There Figure 3 illustrates the arrangement of the jaw 5 of the first jaw element 6, with a pivot connection of axis 15 attaching it to the clamping head 14, and the attachment of the elastic tensioner 25 to the attachment point 26 located here on an upper edge of jaw 5.

La figure 4 est une vue en coupe illustrant le cheminement du câble souple 8 au sein de la pince de levage 1. Cette figure représente uniquement l'une des deux flasques constituant chaque élément de mâchoire 6, 7 et le parcours du câble souple 8 au sein des différentes poulies.There Figure 4 is a sectional view illustrating the path of the flexible cable 8 within the lifting clamp 1. This figure represents only one of the two flanges constituting each jaw element 6, 7 and the path of the flexible cable 8 within the different pulleys.

La pince de levage 1 comporte au moins deux axes fixes de rattachement des deux extrémités du câble souple 8, et au moins une poulie sur le premier élément de mâchoire 6 et une poulie sur le deuxième élément de mâchoire 7. Dans le présent exemple illustratif, les axes fixes et poulies sont agencés comme indiqué ci-après.The lifting clamp 1 comprises at least two fixed axes for connecting the two ends of the flexible cable 8, and at least one pulley on the first jaw element 6 and one pulley on the second jaw element 7. In the present illustrative example, the fixed axes and pulleys are arranged as indicated below.

Le premier élément de mâchoire 6 comporte :

  • un premier axe fixe 27 sur le pied de rattachement 12 ;
  • une première poulie 28 à une extrémité du corps 13, à la jonction entre le corps 13 et la tête de serrage 14 ;
  • un deuxième axe fixe 29 plus loin sur la tête de serrage 17.
The first jaw element 6 comprises:
  • a first fixed axis 27 on the attachment foot 12;
  • a first pulley 28 at one end of the body 13, at the junction between the body 13 and the clamping head 14;
  • a second fixed axis 29 further on the clamping head 17.

Le deuxième élément de mâchoire 7 comporte :

  • une première poulie 30 à une extrémité du corps 16 ;
  • une deuxième poulie 31 à l'autre extrémité du corps 16, à la jonction entre le corps 16 et la tête de serrage 17 ;
  • une troisième poulie 32 plus loin sur la tête de serrage 17.
The second jaw element 7 comprises:
  • a first pulley 30 at one end of the body 16;
  • a second pulley 31 at the other end of the body 16, at the junction between the body 16 and the clamping head 17;
  • a third pulley 32 further on the clamping head 17.

La figure 4 montre comment le premier élément de mâchoire 6 et le deuxième élément de mâchoire 7 sont imbriqués de telle sorte que la tête de serrage 17 du deuxième élément de mâchoire 7 soit insérée dans le corps 13 du premier élément de mâchoire 6, sensiblement perpendiculairement à ce dernier.There figure 4 shows how the first jaw element 6 and the second jaw element 7 are interlocked such that the clamping head 17 of the second jaw element 7 is inserted into the body 13 of the first jaw element 6, substantially perpendicular to the latter .

La vue de la figure 4 montre de plus un perçage 33 dans la tête de serrage 17 du deuxième élément de mâchoire 7, permettant la fixation de l'axe de serrage 19 qui traverse la rainure 18.The view of the figure 4 further shows a drilling 33 in the clamping head 17 of the second jaw element 7, allowing the fixing of the clamping axis 19 which passes through the groove 18.

Le cheminement du câble souple 8, dans l'exemple illustré, est le suivant :

  • une boucle fixe de départ 34 est accrochée sur l'axe fixe 27 ;
  • le câble souple 8 passe dans l'élément d'élingage 10 ;
  • une boucle passe autour de la première poulie 30, sur le deuxième élément de mâchoire 7 ;
  • une boucle passe autour de la deuxième poulie 31 ;
  • une boucle passe autour de la première poulie 28, sur le premier élément de mâchoire 6 ;
  • une boucle passe autour de la troisième poulie 32, à nouveau sur le deuxième élément de mâchoire 7 ;
  • une boucle fixe d'arrivée 35 est accrochée sur l'axe fixe 29.
The routing of the flexible cable 8, in the example illustrated, is as follows:
  • a fixed starting loop 34 is attached to the fixed axis 27;
  • the flexible cable 8 passes through the slinging element 10;
  • a loop passes around the first pulley 30, on the second jaw element 7;
  • a loop passes around the second pulley 31;
  • a loop passes around the first pulley 28, on the first jaw element 6;
  • a loop passes around the third pulley 32, again over the second jaw element 7;
  • a fixed arrival loop 35 is hung on the fixed axis 29.

Les deux axes fixes 27, 29 sont ainsi situés sur le premier élément de mâchoire 6 et les poulies 28, 30, 31, 32, permettent un rapprochement des deux têtes de serrage 14, 17 (et donc des deux mors 5) lorsqu'une traction sur le câble souple 8 est exercée. L'agencement du câble souple 8 permet en effet, lors d'une traction sur ce câble souple 8, de rapprocher les poulies 31 et 32 de la poulie 28, entrainant donc un rapprochement des têtes de serrage 14, 17.The two fixed axes 27, 29 are thus located on the first jaw element 6 and the pulleys 28, 30, 31, 32 allow the two clamping heads 14, 17 (and therefore the two jaws 5) to be brought together when a traction on the flexible cable 8 is exerted. The arrangement of the flexible cable 8 makes it possible, when pulling on this flexible cable 8, to bring the pulleys 31 and 32 closer to the pulley 28, therefore bringing the clamping heads 14, 17 closer together.

La traction sur le câble souple 8 est réalisée par l'intermédiaire de la poulie formant l'élément d'élingage 10, qui permet d'une part d'équilibrer et de centrer l'effort pour un levage d'aplomb du panneau, et pour moufler le câble de levage en démultipliant ainsi l'effort de levage et appliquer cet effort démultiplié au serrage des mors 5.Traction on the flexible cable 8 is carried out via the pulley forming the slinging element 10, which allows on the one hand to balance and center the effort for vertical lifting of the panel, and to reel the lifting cable, thereby increasing the lifting force and applying this increased force to the tightening of the jaws 5.

Les mors 5 sont dimensionnés du point de vue de leur surface, pour ne pas abimer le panneau compte tenu de sa résistance au poinçonnement et de son poids. Optionnellement, les mors 5 comportent un revêtement à faible friction, tel qu'un élastomère, pour augmenter la tenue par un effet d'agrippement s'ajoutant au serrage.The jaws 5 are sized in terms of their surface area, so as not to damage the panel given its resistance to punching and its weight. Optionally, the jaws 5 include a low friction coating, such as an elastomer, to increase the hold by a gripping effect in addition to the tightening.

La pince de levage 1 permet ainsi une mise en place et une tenue optimale du panneau avec peu de risque d'erreur en peu d'opérations. Pour accrocher la pince de levage 1 à un panneau 2 comme illustré aux figures 1, 2 et 3, le levier de desserrage 20 est tout d'abord abaissé en position de desserrage.The lifting clamp 1 thus allows optimal installation and holding of the panel with little risk of error in a few operations. To hang the lifting clamp 1 on a panel 2 as illustrated in figures 1 , 2 And 3 , the release lever 20 is first lowered into the release position.

La pince de levage 1 est ensuite mise en place sur le panneau 2 de sorte que les mors 5 viennent en vis-à-vis des faces latérales 3, 4. Le levier de desserrage 20 est ensuite relâché, de sorte que le tendeur élastique 25 sollicite l'axe de serrage 19 vers l'axe 21 et vienne réaliser un pré-serrage des mors 5 sur le panneau 2. Le tendeur élastique 25 a également pour autre fonction de maintenir les mors 5 sensiblement parallèles aux faces latérales 3, 4, en évitant l'effondrement des mors 5 autour de leur liaison pivot 15 respective.The lifting clamp 1 is then placed on the panel 2 so that the jaws 5 come opposite the side faces 3, 4. The release lever 20 is then released, so that the elastic tensioner 25 biases the clamping axis 19 towards the axis 21 and comes to pre-tighten the jaws 5 on the panel 2. The elastic tensioner 25 also has the other function of maintaining the jaws 5 substantially parallel to the lateral faces 3, 4, avoiding the collapse of the jaws 5 around their respective pivot connection 15.

À ce stade, la pince de levage 1 tient seule sur le panneau 2 et les opérations d'élingage peuvent débuter, la pince de levage 1 étant déjà dans sa position de levage sur le panneau bien que la traction de l'élingue n'a pas encore débuté. À ce stade également, la pince de levage 1 est facilement repositionnée si nécessaire, en manipulant le levier de desserrage 20.At this stage, the lifting clamp 1 holds alone on the panel 2 and the slinging operations can begin, the lifting clamp 1 already being in its lifting position on the panel although the traction of the sling has not not yet started. Also at this point, the lifting clamp 1 is easily repositioned if necessary, by manipulating the release lever 20.

Une fois la pince de levage 1 en place, l'élingage commence avec la mise en oeuvre d'une traction de l'élingue 9 sur l'élément d'élingage 10, ce qui entraine une traction sur le brin double du câble souple 8 puis un rapprochement des deux têtes de serrage 14, 17 et donc un serrage des mors 5 contre les faces latérales 3, 4 du panneau 2. Le serrage a tout d'abord lieu, suivi du levage, sans intervention de l'opérateur.Once the lifting clamp 1 is in place, slinging begins with the implementation of a pull of the sling 9 on the slinging element 10, which results in a pull on the double strand of the flexible cable 8 then a rapprochement of the two clamping heads 14, 17 and therefore a tightening of the jaws 5 against the side faces 3, 4 of the panel 2. Tightening takes place first of all, followed by lifting, without operator intervention.

Lorsque le levage et la manutention du panneau 2 sont terminés, par exemple après que le panneau 2 a été mis en place et fixé au reste de la construction, le retrait de la pince de levage 1 est réalisé en relâchant la traction de l'élingue 9, et en actionnant le levier de desserrage 20 vers le bas, directement à la main lorsque la pince de levage est accessible à l'opérateur. Lorsque la pince de levage 1 est en hauteur, ce qui est le cas pour des panneaux de grande hauteur, l'actionnement du levier de desserrage 20 se fait avec un câble de commande à distance relié à l'attache 24 et accessible depuis le niveau du sol.When the lifting and handling of the panel 2 are completed, for example after the panel 2 has been put in place and fixed to the rest of the construction, the removal of the lifting clamp 1 is carried out by releasing the traction of the sling 9, and by operating the release lever 20 downwards, directly by hand when the lifting clamp is accessible to the operator. When the lifting clamp 1 is at height, which is the case for very high panels, the release lever 20 is actuated with a remote control cable connected to the attachment 24 and accessible from the level of the ground.

Il n'est pas possible de desserrer les mors 5 lorsque le panneau 2 est en cours de levage, car son propre poids entraine un serrage démultiplié sur le panneau 2, même en cas de manipulation du levier de desserrage 20, ce qui participe à la sécurité du levage.It is not possible to loosen the jaws 5 when the panel 2 is being lifted, because its own weight causes increased tightening on the panel 2, even in the event of manipulation of the loosening lever 20, which contributes to the lifting safety.

Les figures 5 à 8 illustrent une pince de levage 1 selon un deuxième mode de réalisation de l'invention. Selon ce deuxième mode de réalisation, tous les éléments de la pince de levage sont identiques au premier mode de réalisation (notamment le premier élément de mâchoire 6, le deuxième élément de mâchoire 7, et le câble souple 8) excepté le levier de desserrage 20 qui présente ici une variante. Le câble souple 8, qui a la même disposition que dans le premier mode de réalisation, n'a pas été représenté sur ces figures.THE figures 5 to 8 illustrate a lifting clamp 1 according to a second embodiment of the invention. According to this second embodiment, all the elements of the lifting clamp are identical to the first embodiment (in particular the first jaw element 6, the second jaw element 7, and the flexible cable 8) except the release lever 20 which presents a variation here. The flexible cable 8, which has the same arrangement as in the first embodiment, has not been shown in these figures.

Le levier de desserrage 20 comporte des éléments symétriques disposés de part et d'autre des éléments de mâchoire 6, 7 (voir figure 5). Ainsi, de chaque côté des éléments de mâchoire 6, 7, le levier de desserrage 20 comporte une barre 37 dont l'une des extrémités est en liaison pivot avec le deuxième élément de mâchoire 7, par l'intermédiaire de l'axe de serrage 19. Cette extrémité de la barre 37 est montée rotative sur l'axe de serrage 19 (qui est rattaché au deuxième élément de mâchoire 7 et qui passe à travers la rainure 18), avec un réa 38 adapté à recevoir un tendeur 25 (voir premier mode de réalisation, figure 3).The release lever 20 comprises symmetrical elements arranged on either side of the jaw elements 6, 7 (see Figure 5 ). Thus, on each side of the jaw elements 6, 7, the release lever 20 comprises a bar 37, one of the ends of which is in pivotal connection with the second jaw element 7, via the clamping axis 19. This end of the bar 37 is rotatably mounted on the clamping pin 19 (which is attached to the second jaw element 7 and which passes through the groove 18), with a sheave 38 adapted to receive a tensioner 25 (see first embodiment, Figure 3 ).

De même, de chaque côté des éléments de mâchoire 6, 7, les barres 37 présent chacune une deuxième extrémité qui sont reliées entre elles par une traverse 39. La traverse 39 peut former une poignée pour l'actionnement du levier de desserrage 20 et comporte de plus des moyens de fixation 40 destinée à recevoir une poulie (illustrée uniquement sur les figures 7 et 8).Likewise, on each side of the jaw elements 6, 7, the bars 37 each have a second end which are connected together by a crosspiece 39. The crosspiece 39 can form a handle for actuating the release lever 20 and comprises in addition fixing means 40 intended to receive a pulley (illustrated only on the figures 7 and 8 ).

Le levier de desserrage 20 comporte de plus une biellette 23 de chaque côté des éléments de mâchoire 6, 7. Chaque biellette 23 présente une extrémité reliée par une liaison pivot d'axe 22 à l'une des barres 37, et présente une autre extrémité en liaison pivot avec le premier élément de mâchoire 6. Cette liaison entre l'extrémité de chaque biellette 23 et le premier élément de mâchoire 6 est réalisée par un pivot 51 portant également avec un réa 38 (pour le tendeur 25, non représenté sur les figures 5 à 8) et une entretoise de verrouillage 48.The release lever 20 further comprises a link 23 on each side of the jaw elements 6, 7. Each link 23 has one end connected by a pivot connection of axis 22 to one of the bars 37, and has another end in pivot connection with the first jaw element 6. This connection between the end of each link 23 and the first jaw element 6 is produced by a pivot 51 also carrying with a sheave 38 (for the tensioner 25, not shown on the figures 5 to 8 ) and a locking spacer 48.

L'actionnement de la traverse 39 vers le bas provoque le coulissement de l'axe de serrage 19 dans la rainure 18 et l'écartement des mors 5.Actuating the crosspiece 39 downwards causes the clamping pin 19 to slide in the groove 18 and the jaws 5 to move apart.

Le levier de desserrage 20 comporte de plus un verrou 42 monté rotatif sur les barres 37 suivant un pivot 43. Le verrou 42 est formé de deux joues 44 disposées de part et d'autre des éléments de mâchoire 6, 7. Les joues 44 sont reliées par une traverse 45 et comportent chacune un crochet 49 adapté à crocheter l'entretoise de verrouillage 48 correspondante.The release lever 20 further comprises a lock 42 rotatably mounted on the bars 37 along a pivot 43. The lock 42 is formed of two cheeks 44 arranged on either side of the jaw elements 6, 7. The cheeks 44 are connected by a crosspiece 45 and each include a hook 49 adapted to hook the corresponding locking spacer 48.

La traverse 45 du verrou 42 reçoit une fixation 46 prévue pour une extrémité de câble de commande à distance 47.The crosspiece 45 of the lock 42 receives a fixing 46 provided for one end of the remote control cable 47.

Les figures 7 et 8 illustrent la pince de levage 1 avec sa poulie 41 montée sur la traverse 39 et son câble de commande à distance 47 mis en place dans cette poulie 41 et dont l'extrémité est fixée sur la traverse 45 du verrou 42. La figure 7 illustre la position ouverte de la pince de levage 1 (les mors 5 étant écartés au maximum), en configuration déverrouillée. La figure 8 illustre la position ouverte de la pince de levage 1, en configuration verrouillée.THE figures 7 and 8 illustrate the lifting clamp 1 with its pulley 41 mounted on the crosspiece 39 and its remote control cable 47 placed in this pulley 41 and the end of which is fixed on the crosspiece 45 of the lock 42. Figure 7 illustrates the open position of the lifting clamp 1 (the jaws 5 being spread as far apart as possible), in the unlocked configuration. There figure 8 illustrates the open position of lifting clamp 1, in locked configuration.

Le verrouillage et déverrouillage de la pince de levage se réalisent en deux temps.The lifting clamp is locked and unlocked in two stages.

Les opérations d'ouverture de la pince de levage 1 et de verrouillage se déroulent comme indiqué ci-après. Ces opérations sont réalisées lorsque le levage de la charge est terminé, et qu'il est prévu de décrocher la pince de levage 1 du panneau, ce dernier étant alors maintenu par d'autres éléments (par exemple lorsque le montage du panneau dans sa structure est terminé). En référence à la figure 7, un opérateur (ou un dispositif d'actionnement du câble de commande à distance 47) tire d'abord sur le câble de commande à distance 47, ce qui a pour effet de rapprocher au maximum le verrou 42 en direction des barres 37, puis d'actionner les barres 37 vers le bas, ce qui entraine finalement un déplacement de l'axe de serrage 19 et un écartement des mors 5.The opening and locking operations of the lifting clamp 1 are carried out as indicated below. These operations are carried out when the lifting of the load is completed, and it is planned to unhook the lifting clamp 1 from the panel, the latter then being held by other elements (for example when mounting the panel in its structure is finished). In reference to the Figure 7 , an operator (or a device for actuating the remote control cable 47) first pulls on the remote control cable 47, which has the effect of bringing the lock 42 as close as possible towards the bars 37, then to actuate the bars 37 downwards, which ultimately leads to a movement of the clamping axis 19 and a spacing of the jaws 5.

En référence à la figure 8, la tension sur le câble de commande à distance 47 est ensuite relâchée, ce qui a pour effet de libérer le verrou 42. Ce dernier vient alors se placer par gravité dans la position de verrouillage de la figure 8, les crochets 49 venant crocheter les entretoises de verrouillage 48. La pince de levage 1 est ainsi en configuration de verrouillage et est ainsi maintenue en position ouverte, elle peut alors être extraite de la charge, en gardant sa position ouverte.In reference to the figure 8 , the tension on the remote control cable 47 is then released, which has the effect of releasing the lock 42. The latter then comes to be placed by gravity in the locking position of the figure 8 , the hooks 49 coming to hook the locking spacers 48. The lifting clamp 1 is thus in locking configuration and is thus held in the open position, it can then be extracted from the load, keeping its open position.

À partir de cette configuration de verrouillage, la pince de levage 1 peut être mise en position pour soulever à nouveau une charge, en encadrant la charge par les deux mors 5. Une traction est ensuite exercée sur le câble de commande à distance 47, pour atteindre la position de la figure 7 et mettre le verrou 42 en position de déverrouillage. La levée de charge peut ensuite être réalisée en actionnant les moyens de grutage qui vont lever l'élingue, ce qui va mettre en tension le câble souple 8, entrainant le rapprochement des deux mors 5 jusqu'à un serrage optimal de la charge, puis le soulèvement de la charge.From this locking configuration, the lifting clamp 1 can be placed in position to lift a load again, by framing the load by the two jaws 5. Traction is then exerted on the remote control cable 47, to reach the position of the Figure 7 and put the lock 42 in the unlocked position. The load can then be lifted by activating the crane means which will lift the sling, which will put the flexible cable 8 in tension, causing the two jaws 5 to come together until the load is optimally tightened, then lifting the load.

La prise et le largage d'une charge se font ainsi de manière extrêmement simple par seulement deux commandes : l'actionnement du câble de commande à distance 47, et l'actionnement des éléments d'élingage. Ces deux commandes permettent l'ouverture et la fermeture des mors 5, la levée de la charge, le verrouillage et le déverrouillage de la position d'ouverture de la pince de levage 1.Picking up and releasing a load is thus extremely simple with just two commands: actuation of the remote control cable 47, and actuation of the slinging elements. These two controls allow the opening and closing of the jaws 5, the lifting of the load, the locking and unlocking of the opening position of the lifting clamp 1.

Quel que soit son mode de réalisation, la pince de levage 1 garanti une sureté de fonctionnement élevée, impérative dans ce domaine, et ce pour une plage de serrage possible de très grande ampleur. Dans le présent exemple, la pince de levage 1 est adaptée au serrage d'épaisseurs comprises en 3 et 300 mm, pour un fardeau jusqu'à trois tonnes, c'est-à-dire une épaisseur de prise maximale cent fois supérieure à l'épaisseur de prise minimale. Une même pince de levage 1 est ainsi adaptée à la totalité des épaisseurs à lever possibles sur un chantier classique, par exemple de construction à ossature bois, rendant inutiles de fastidieux et couteux changements de pinces.Whatever its embodiment, the lifting clamp 1 guarantees high operational safety, imperative in this field, and this for a very wide possible clamping range. In the present example, the lifting clamp 1 is suitable for clamping thicknesses between 3 and 300 mm, for a load of up to three tonnes, that is to say a maximum grip thickness one hundred times greater than l minimum setting thickness. The same lifting clamp 1 is thus adapted to all possible thicknesses to be lifted on a conventional site, for example of wooden frame construction, making tedious and expensive clamp changes unnecessary.

La figure 9 illustre la pince de levage 1 (dans cet exemple, selon le deuxième mode de réalisation) en cours de levage d'une poutre 50 de très faible épaisseur. À noter que le câble souple 8 passe entre les joues 44 du verrou 42 et entre les barres 37 du levier de desserrage 20, de sorte que dans cette position le câble souple 8 maintient en l'air le levier de desserrage 20 et le verrou 42.There Figure 9 illustrates the lifting clamp 1 (in this example, according to the second embodiment) in the process of lifting a very thin beam 50. Note that the flexible cable 8 passes between the cheeks 44 of the lock 42 and between the bars 37 of the release lever 20, so that in this position the flexible cable 8 keeps the release lever 20 and the lock 42 in the air .

Des variantes de réalisation peuvent être envisagées. Notamment, la construction des éléments de mâchoire 6, 7 peut être différente de la structure en flasques décrite, tant que ces éléments permettent à la tête de serrage 17 du deuxième élément de mâchoire 7 de traverser le premier élément de mâchoire 6. Cette traversée peut se faire par le milieu ou les côtés du premier élément de mâchoire 6.Variant embodiments can be considered. In particular, the construction of the jaw elements 6, 7 may be different from the structure in flanges described, as long as these elements allow the clamping head 17 of the second jaw element 7 to pass through the first jaw element 6. This crossing can be done through the middle or the sides of the first jaw element 6.

En variante, le nombre de poulies peut être modifié pour obtenir un nombre différent de brins du câble souple 8 réalisant des aller-retours entre les éléments de mâchoire 6,7, de sorte à modifier la démultiplication du serrage en fonction du poids soulevé. Par exemple, la force de serrage peut être augmentée en remplaçant l'axe fixe 29 par une poulie autour de laquelle le câble souple 8 est renvoyé sur un nouvel axe fixe qui est fixé sur la tête de serrage 17 du deuxième élément de mâchoire 7.Alternatively, the number of pulleys can be modified to obtain a different number of strands of the flexible cable 8 moving back and forth between the jaw elements 6,7, so as to modify the tightening ratio as a function of the weight lifted. For example, the clamping force can be increased by replacing the fixed axis 29 with a pulley around which the flexible cable 8 is returned to a new fixed axis which is fixed on the clamping head 17 of the second jaw element 7.

Claims (13)

Pince de levage pour panneaux fermés, adaptée à saisir un panneau par serrage suivant une direction de serrage (36), caractérisée en ce qu'elle comporte : - un premier élément de mâchoire (6) comportant: un corps (13) s'étendant sensiblement suivant la direction de serrage (36) ; une tête de serrage (14) s'étendant sensiblement perpendiculairement par rapport au corps (13) ; et un mors (5) monté sur cette tête de serrage (14) ; - un deuxième élément de mâchoire (7) comportant : un corps (16) s'étendant sensiblement suivant la direction de serrage (36) ; une tête de serrage (17) s'étendant sensiblement perpendiculairement par rapport au corps (16) ; et un mors (5) monté sur cette tête de serrage (17) ; - un câble souple (8) cheminant entre au moins une poulie montée sur le premier élément de mâchoire (6), et au moins une poulie montée sur le deuxième élément de mâchoire (7) ; le deuxième élément de mâchoire (7) étant relié au premier élément de mâchoire (6) suivant une liaison pivot autour d'un axe de serrage (19) qui s'étend suivant une direction sensiblement perpendiculaire à la direction de serrage (36), et qui est mobile le long d'une glissière (11) s'étendant sur le corps (13) du premier élément de mâchoire (6), sensiblement suivant la direction de serrage (36).Lifting clamp for closed panels, suitable for gripping a panel by tightening in a tightening direction (36), characterized in that it comprises: - a first jaw element (6) comprising: a body (13) extending substantially in the clamping direction (36); a clamping head (14) extending substantially perpendicular to the body (13); and a jaw (5) mounted on this clamping head (14); - a second jaw element (7) comprising: a body (16) extending substantially in the clamping direction (36); a clamping head (17) extending substantially perpendicular to the body (16); and a jaw (5) mounted on this clamping head (17); - a flexible cable (8) running between at least one pulley mounted on the first jaw element (6), and at least one pulley mounted on the second jaw element (7); the second jaw element (7) being connected to the first jaw element (6) following a pivot connection around a clamping axis (19) which extends in a direction substantially perpendicular to the clamping direction (36), and which is movable along a slide (11) extending on the body (13) of the first jaw element (6), substantially in the tightening direction (36). Pince de levage selon la revendication 1, caractérisée en ce qu'elle comporte un levier de desserrage (20) adapté à déplacer l'axe de serrage (19) le long de ladite glissière (11).Lifting clamp according to claim 1, characterized in that it comprises a release lever (20) adapted to move the clamping axis (19) along said slide (11). Pince de levage selon la revendication 2, caractérisée en ce que le levier de desserrage (20) comporte une barre (37) présentant une première extrémité en liaison pivot avec le premier élément de mâchoire (6).Lifting clamp according to claim 2, characterized in that the release lever (20) comprises a bar (37) having a first end in pivotal connection with the first jaw element (6). Pince de levage selon la revendication 3, caractérisée en ce que le levier de desserrage (20) comporte une attache (24) de commande à distance au niveau de la deuxième extrémité de la barre (37).Lifting clamp according to claim 3, characterized in that the release lever (20) comprises a remote control attachment (24) at the second end of the bar (37). Pince de levage selon l'une des revendications 3 ou 4, caractérisée en ce que le levier de desserrage (20) comporte une biellette (23) en liaison pivot avec la barre (37), et en liaison pivot avec l'axe de serrage (19).Lifting clamp according to one of claims 3 or 4, characterized in that the release lever (20) comprises a link (23) in pivotal connection with the bar (37), and in pivotal connection with the clamping axis (19). Pince de levage selon l'une des revendications 2 à 5, caractérisé en ce que le levier de desserrage (20) comporte : un verrou (42) monté rotatif sur le levier de desserrage (20) et adapté à crocheter une entretoise de verrouillage (48) solidaire du premier élément de mâchoire (6) ; et un câble de commande à distance (47) dont une extrémité est rattachée au verrou (42), et qui passe par une poulie (41) rattachée au levier de desserrage (20).Lifting clamp according to one of claims 2 to 5, characterized in that the release lever (20) comprises: a lock (42) rotatably mounted on the release lever (20) and adapted to hook a locking spacer ( 48) integral with the first jaw element (6); and a remote control cable (47) one end of which is attached to the lock (42), and which passes through a pulley (41) attached to the release lever (20). Pince de levage selon l'une des revendications précédentes, caractérisée en ce qu'elle comporte un tendeur élastique (25) tendu entre le mors (5) du premier élément de mâchoire (6) et le mors (5) du deuxième élément de mâchoire (7), et cheminant par l'axe de serrage (19).Lifting clamp according to one of the preceding claims, characterized in that it comprises an elastic tensioner (25) stretched between the jaw (5) of the first jaw element (6) and the jaw (5) of the second jaw element (7), and traveling through the clamping axis (19). Pince de levage selon l'une des revendications précédentes, caractérisée en ce que l'axe de serrage (19) et ladite glissière (11) sont réalisés par un arbre fixé sur la tête de serrage (17) du deuxième élément de mâchoire (7) et saillant à travers une rainure (18) débouchante pratiquée dans le corps (13) du premier élément de mâchoire (6).Lifting clamp according to one of the preceding claims, characterized in that the clamping axis (19) and said slide (11) are produced by a shaft fixed on the clamping head (17) of the second jaw element (7 ) and projecting through an opening groove (18) made in the body (13) of the first jaw element (6). Pince de levage selon l'une des revendications précédentes, caractérisée en ce que la tête de serrage (17) du deuxième élément de mâchoire (7) est insérée transversalement à travers le corps (13) du premier élément de mâchoire (6).Lifting clamp according to one of the preceding claims, characterized in that the clamping head (17) of the second jaw element (7) is inserted transversely through the body (13) of the first jaw element (6). Pince de levage selon l'une des revendications précédentes, caractérisée en ce que le câble souple (8) chemine entre : - un premier axe fixe (27) monté sur le premier élément de mâchoire (6) ; - une première poulie (30) montée sur le deuxième élément de mâchoire (7) ; - une deuxième poulie (31) montée sur le deuxième élément de mâchoire (7) ; - une première poulie (28) montée sur le premier élément de mâchoire (6) ; - une troisième poulie (32) montée sur le deuxième élément de mâchoire (7) ; - un deuxième axe fixe (29) monté sur le premier élément de mâchoire (6). Lifting clamp according to one of the preceding claims, characterized in that the flexible cable (8) runs between: - a first fixed axis (27) mounted on the first jaw element (6); - a first pulley (30) mounted on the second jaw element (7); - a second pulley (31) mounted on the second jaw element (7); - a first pulley (28) mounted on the first jaw element (6); - a third pulley (32) mounted on the second jaw element (7); - a second fixed axis (29) mounted on the first jaw element (6). Pince de levage selon la revendication 10, caractérisée en ce qu'elle comporte un élément d'élingage (10) monté sur le câble souple (8) entre le premier axe fixe (27) du premier élément de mâchoire (6) et la première poulie (30) du deuxième élément de mâchoire (7).Lifting clamp according to claim 10, characterized in that it comprises a slinging element (10) mounted on the flexible cable (8) between the first fixed axis (27) of the first jaw element (6) and the first pulley (30) of the second jaw element (7). Pince de levage selon l'une des revendications précédentes, caractérisée en ce que le premier élément de mâchoire (6) comporte un pied de rattachement (12) s'étendant sensiblement perpendiculairement à la direction de serrage (36), dans le sens opposé à la tête de serrage (14), un axe fixe (27) étant monté sur ce pied de rattachement (12).Lifting clamp according to one of the preceding claims, characterized in that the first jaw element (6) comprises a connecting foot (12) extending substantially perpendicular to the clamping direction (36), in the direction opposite to the clamping head (14), a fixed axis (27) being mounted on this attachment foot (12). Pince de levage selon l'une des revendications précédentes, caractérisée en ce que le mors (5) du premier élément de mâchoire (6) et le mors (5) du deuxième élément de mâchoire (7) sont chacun montés sur leur tête de serrage (14,17) respective par une liaison pivot (15) dont l'axe est sensiblement perpendiculaire à la direction de serrage (36).Lifting pliers according to one of the preceding claims, characterized in that the jaw (5) of the first jaw element (6) and the jaw (5) of the second jaw element (7) are each mounted on their clamping head (14,17) respectively by a pivot connection (15) whose axis is substantially perpendicular to the tightening direction (36).
EP23170874.4A 2022-04-28 2023-04-28 Lifting clamp for closed panels Pending EP4269316A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR2204011A FR3135076B1 (en) 2022-04-28 2022-04-28 LIFTING CLAMP FOR CLOSED PANELS

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FR (1) FR3135076B1 (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3612597A (en) * 1969-06-03 1971-10-12 Albert R Wirkkala Log grapple
US3718362A (en) * 1970-05-26 1973-02-27 E Butz Hoist apparatus
US4262952A (en) * 1979-12-26 1981-04-21 Bradley Lifting Corp. Lifting tong toggle lock
DE9116069U1 (en) * 1991-12-24 1992-04-30 Schoch, Manfred, 7293 Pfalzgrafenweiler Stone tongs for lifting bricks
DE19544463A1 (en) * 1995-11-29 1997-06-05 Winden Und Maschinenbau Gresba Pincer-type gripper for vehicle with lifting device or mobile crane for gripping and handling loads
DE20212400U1 (en) * 2002-08-13 2003-03-13 Winden Und Maschb Gresbach Gmb Gripping means device
DE102013100775A1 (en) * 2013-01-25 2014-07-31 Demag Cranes & Components Gmbh Mechanical load receiving attachment i.e. clamping gripper, for gripping cardboard boxes, has grab arms more linearly slidable at guide carrier with clamping jaws that are pressable at merchandise by flexible drive

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3612597A (en) * 1969-06-03 1971-10-12 Albert R Wirkkala Log grapple
US3718362A (en) * 1970-05-26 1973-02-27 E Butz Hoist apparatus
US4262952A (en) * 1979-12-26 1981-04-21 Bradley Lifting Corp. Lifting tong toggle lock
DE9116069U1 (en) * 1991-12-24 1992-04-30 Schoch, Manfred, 7293 Pfalzgrafenweiler Stone tongs for lifting bricks
DE19544463A1 (en) * 1995-11-29 1997-06-05 Winden Und Maschinenbau Gresba Pincer-type gripper for vehicle with lifting device or mobile crane for gripping and handling loads
DE20212400U1 (en) * 2002-08-13 2003-03-13 Winden Und Maschb Gresbach Gmb Gripping means device
DE102013100775A1 (en) * 2013-01-25 2014-07-31 Demag Cranes & Components Gmbh Mechanical load receiving attachment i.e. clamping gripper, for gripping cardboard boxes, has grab arms more linearly slidable at guide carrier with clamping jaws that are pressable at merchandise by flexible drive

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FR3135076B1 (en) 2024-05-17
FR3135076A1 (en) 2023-11-03

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