EP0508907B1 - Tilting counterweight arrangement for deployable cranes - Google Patents
Tilting counterweight arrangement for deployable cranes Download PDFInfo
- Publication number
- EP0508907B1 EP0508907B1 EP92401020A EP92401020A EP0508907B1 EP 0508907 B1 EP0508907 B1 EP 0508907B1 EP 92401020 A EP92401020 A EP 92401020A EP 92401020 A EP92401020 A EP 92401020A EP 0508907 B1 EP0508907 B1 EP 0508907B1
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- EP
- European Patent Office
- Prior art keywords
- counterweight
- crane
- platform
- support
- connecting rods
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
- B66C23/26—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes for use on building sites; constructed, e.g. with separable parts, to facilitate rapid assembly or dismantling, for operation at successively higher levels, for transport by road or rail
- B66C23/34—Self-erecting cranes, i.e. with hoisting gear adapted for crane erection purposes
- B66C23/348—Self-erecting cranes, i.e. with hoisting gear adapted for crane erection purposes the erection being operated by jacks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/72—Counterweights or supports for balancing lifting couples
- B66C23/74—Counterweights or supports for balancing lifting couples separate from jib
- B66C23/76—Counterweights or supports for balancing lifting couples separate from jib and movable to take account of variations of load or of variations of length of jib
Definitions
- the present invention relates to a crane as defined in the preamble of claim 1, and shown in the brochure of the company "Comanso" concerning the model crane "Hi-Tec HT1640".
- a mobile counterweight system in which the counterweight can be placed alternately in working or transport positions by an appropriate tilting of the latter tilting. by which, in the working position, it is placed in its effective position behind the crane while in the transport position it is folded forward, thus being able to occupy all the space available between the folded structures of the crane and in turn advancing the center of gravity of the folded assembly, so that a better distribution of the load on the crane transport vehicle is obtained.
- the corresponding folding actuation and unfolding cylinder of the crane is located between the counterweight support and the rotating platform, with articulated couplings at its ends, so that the weight of said actuating cylinder is added to that of the counterweight, increasing the effect of the latter in the working position while, in the transport position, said weight of the cylinder remains above the center of gravity of the assembly, thereby reducing the unfavorable weight of the folded assembly on the platform of the transport vehicle.
- the front part of the tower remains free to accommodate an access ladder.
- Figure 1 is a perspective representation of the lower part of a tilting tower crane equipped with a conventional counterweight.
- Figure 2 is a similar representation of a tilting tower crane equipped with a counterweight according to the system object of the invention.
- Figure 3 is a representation of the same crane of the previous figure, without the counterweight.
- Figure 4 is the representation of the same crane as in the previous two figures, with the counterweights partially cut, so that one can clearly see the support of these counterweights.
- Figure 5 is a detail of the attachment of counterweight attachment in the recommended system.
- Figure 6 is a schematic representation of the entire crane according to the object of the invention, in a semi-folded position.
- Figure 7 is a representation of the same crane assembly in the fully folded position.
- Figure 8 is a representation of the assembly of a conventional crane in the folded position.
- Figure 9 is the representation of the entire crane according to the object of the invention in the unfolded position.
- Figure 10 is a representation of the lower part of the crane according to the solution recommended in an alternative embodiment according to which the actuator cylinder for folding and unfolding is disposed between the rotating platform and the counterweight support.
- Figure 11 is a schematic representation of the semi-folded assembly of the crane according to this embodiment of the previous figure.
- the object of the invention consists of a tilting counterweight system for foldable cranes according to which the counterweight consists of a support (1) in the form of an "L" on which the constituent bodies (2) and (3) are located. the actual counterweight.
- These bodies (2 and 3) are designed so that between the upper bodies (2), there remains a suitable vacuum to accommodate the upper segment (4) of the articulated tower of the crane in the transport position.
- the lower body (3) of the counterweight which can be formed in one piece or in several pieces, is directly supported on the longitudinal beams of the support (1) in "L" shape; said body (3) being fitted (see FIG. 5) on rings (5) integral with the above-mentioned longitudinal beams of the support (1), so that thus said body (3) is well centered, the fixing of this body, at the same time as that of the upper bodies (2), effected by means of bars (6) which are assembled by screwing, by one of their ends, to the above-mentioned rings (5) while, on their other end, are mounted nuts (7), so that it establishes a one-piece assembly in mounting between the support (1) and the respective counterweight bodies (2) and (3).
- the longitudinal beams of the support (1) terminate at their free end by ears (8) by means of which they are articulated, on the axis (9) to connecting rods (10) which, by their other end, s' articulate by means of the axis (11) to the lower segment (12) of the articulated tower of the crane.
- the aforementioned support (1) is articulated in turn, by means of the axis (15), and in a more remote area, to uprights (13) located in the rear part of the plate - rotating form (14) of the crane.
- the lower segment (12) of the articulated tower, the connecting rods (10), the longitudinal beams of the support (1) of the counterweight and the rotating platform (14) constitute a deformable quadrilateral with vertices articulated at right of the axes (9), (11) and (15) above and of the axis (16). It is via this axis (16) that the lower segment (12) of the articulated tower is assembled to the platform. rotating (14).
- the upper segment (4) of the articulated tower rests on the lower body (3) of the counterweight, being housed between the upper bodies (2) of the latter; however that the aforesaid lower body (3) of the counterweight is housed between the upper segment (4) of the articulated tower and the rotating platform (14) and that the bodies (2) occupy the free spaces located on the sides of the segment upper (4) above of the tower.
- the cylinder (20), the actuation of which produces the folding and unfolding of the crane is, as can be seen in FIGS. 10 and 11, between the platform rotating (14) and the support (1) of the counterweight, with articulation of one of its ends on the structure of the aforementioned rotating platform (14) by means of an axis (21) and with articulated mounting of its other end on the front crosspiece of the aforementioned support (1) of the counterweight by means of an axis (22).
- the aforementioned front crosspiece of the support (1) of the counterweight assembles, for its part, using connecting rods (23) which are articulated to the actuating assembly (17) which is designed to ensure the simultaneous mobility of the two articulated segments (4 and 12) of the foldable tower.
- the actuation of the cylinder (20) causes the counterweight to tilt, in folding or lifting to place it in its respective positions, for transport or work, while said tilting of the counterweight causes, using the connecting rods ( 10), the simultaneous possibility of folding or lifting the lower segment (12) of the tower and, using the connecting rods (23), it in turn actuates the assembly (17) of actuation between the two segments (4 and 12) of the tower, so that, together with this possibility of folding and lifting the counterweight, the tower is automatically folded or unfolded.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Transportation (AREA)
- Jib Cranes (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
Description
La présente invention concerne une grue telle que définie dans le préambule de la revendication 1, et montrée dans la brochure de l'entreprise "Comanso" concernant la grue modèle "Hi-Tec HT1640".The present invention relates to a crane as defined in the preamble of
La technologie moderne des grues dépliables permet de réaliser un montage rapide et automatique desdites grues sur le lieu d'utilisation ainsi qu'un transport commode et simple jusqu'au lieu voulu, avantage qu'on ne peut obtenir pleinement que si le contrepoids fait partie de la grue aussi bien dans le travail que dans le transport.The modern technology of foldable cranes allows for quick and automatic assembly of said cranes at the place of use as well as a convenient and simple transport to the desired place, an advantage that can only be fully obtained if the counterweight is part of the crane both in work and in transport.
Or, du fait des fonctions propres du contrepoids qui sont : d'une part d'équilibrer le couple de basculement de la flèche et une partie du couple utile, d'autre part, de fournir à la grue le couple nécessaire pour assurer sa stabilité, ceci exige de placer ce contrepoids sur la partie arrière de la plate-forme tournante, ce qui fait que, dans de nombreuses occasions, les conditions de transport sont insatisfaisantes, en raison de la position dans laquelle se trouve le centre de gravité de la grue repliée.However, because of the proper functions of the counterweight which are: on the one hand to balance the tilting torque of the boom and part of the useful torque, on the other hand, to provide the crane with the torque necessary to ensure its stability , this requires placing this counterweight on the rear part of the turntable, which means that, on many occasions, the transport conditions are unsatisfactory, due to the position in which the center of gravity of the folded crane.
Etant donné que cette position du contrepoids empêche à son tour d'utiliser dans le transport tout l'espace qui est disponible avec la grue pliée, ce qui se traduit par une limitation du volume du lest transportable, de sorte que, dans les grues de grandes dimensions, tout le contrepoids nécessaire pour le fonctionnement ne peut pas être incorporé à la grue pendant le transport ; avec pour conséquence que le montage et le démontage du contrepoids non incorporé compliquent le processus du montage, ce qui dépossède évidemment les technologies de montage rapide de leur impact maximum.Since this position of the counterweight in turn prevents the use of all the space available with the folded crane in transport, which results in a limitation of the volume of transportable ballast, so that in cranes large dimensions, all the counterweight necessary for operation cannot be incorporated into the crane during transport; with the consequence that the assembly and disassembly of the unincorporated counterweight complicates the assembly process, which obviously deprives rapid assembly technologies of their maximum impact.
Pour s'affranchir de ces inconvénients, selon l'objet de la présente invention, on propose un système de contrepoids mobile selon lequel le contrepoids peut être placé tour à tour dans des positions de travail ou de transport par un basculement approprié de ce dernier basculement par lequel, dans la position de travail, il se place dans sa position effective en arrière de la grue tandis que, dans la position de transport, il est rabattu vers l'avant, en pouvant ainsi occuper tout l'espace disponible entre les structures repliées de la grue et avancer à son tour le centre de gravité de l'ensemble plié, de sorte qu'on obtient une meilleure répartition de la charge sur le véhicule de transport de la grue.To overcome these drawbacks, according to the object of the present invention, there is provided a mobile counterweight system in which the counterweight can be placed alternately in working or transport positions by an appropriate tilting of the latter tilting. by which, in the working position, it is placed in its effective position behind the crane while in the transport position it is folded forward, thus being able to occupy all the space available between the folded structures of the crane and in turn advancing the center of gravity of the folded assembly, so that a better distribution of the load on the crane transport vehicle is obtained.
Ce but est atteint par les caractéristiques définies dans la partie caractérisante de la revendication 1.This object is achieved by the characteristics defined in the characterizing part of
De cette façon, l'automatisme de la mise en station de la grue reste intégralement conservé, en même temps que le contrepoids peut rester entier dans la position de transport. On obtient ainsi une grande rapidité de mise en station et, d'un autre côté, de très bonnes conditions pour le transport, puisque le contrepoids est entièrement logé dans les limites de l'ensemble plié de la tour et de la flèche, et avec le centre de gravité déporté vers le centre.In this way, the automation of the crane stationing remains fully preserved, at the same time that the counterweight can remain whole in the transport position. This gives great rapidity in setting up and, on the other hand, very good conditions for transport, since the counterweight is entirely housed within the limits of the folded assembly of the tower and the boom, and with the center of gravity moved towards the center.
Selon une variante de réalisation pratique, on prévoit en outre que le cylindre correspondant d'actionnement de pliage et du dépliage de la grue se trouve entre le support du contrepoids et la plate-forme tournante, avec des accouplements articulés à ses extrémités, de sorte que le poids dudit cylindre d'actionnement s'ajoute à celui du contrepoids, en augmentant l'effet de ce dernier dans la position de travail tandis que, dans la position de transport, ledit poids du cylindre reste au-dessus du centre de gravité de l'ensemble, en diminuant ainsi le poids défavorable de l'ensemble plié sur la plate-forme du véhicule de transport. En même temps, la partie avant de la tour reste libre pour y loger une échelle d'accès.According to a practical embodiment, it is further provided that the corresponding folding actuation and unfolding cylinder of the crane is located between the counterweight support and the rotating platform, with articulated couplings at its ends, so that the weight of said actuating cylinder is added to that of the counterweight, increasing the effect of the latter in the working position while, in the transport position, said weight of the cylinder remains above the center of gravity of the assembly, thereby reducing the unfavorable weight of the folded assembly on the platform of the transport vehicle. At the same time, the front part of the tower remains free to accommodate an access ladder.
Pour mieux comprendre la nature de l'invention, nous représentons aux dessins annexés, à titre d'exemple purement illustratif et non limitatif, une forme préférée de réalisation industrielle, à laquelle nous nous référons dans notre description. Et sur lesdits dessins,To better understand the nature of the invention, we represent in the accompanying drawings, by way of purely illustrative and nonlimiting example, a preferred industrial embodiment, to which we refer in our description. And on said drawings,
la figure 1 est une représentation en perspective de la partie inférieure d'une grue à tour basculante équipée d'un contrepoids classique.Figure 1 is a perspective representation of the lower part of a tilting tower crane equipped with a conventional counterweight.
La figure 2 est une représentation similaire d'une grue à tour basculante équipée d'un contrepoids conforme au système objet de l'invention.Figure 2 is a similar representation of a tilting tower crane equipped with a counterweight according to the system object of the invention.
La figure 3 est une représentation de la même grue de la figure précédente, dépourvue du contrepoids.Figure 3 is a representation of the same crane of the previous figure, without the counterweight.
La figure 4 est la représentation de la même grue que sur les deux figures précédentes, avec les contrepoids partiellement coupés, de sorte qu'on peut voir clairement le support de ces contrepoids.Figure 4 is the representation of the same crane as in the previous two figures, with the counterweights partially cut, so that one can clearly see the support of these counterweights.
La figure 5 est un détail de la fixation d'attache des contrepoids dans le système préconisé.Figure 5 is a detail of the attachment of counterweight attachment in the recommended system.
La figure 6 est une représentation schématique de l'ensemble de la grue selon l'objet de l'invention, dans une position semi-pliée.Figure 6 is a schematic representation of the entire crane according to the object of the invention, in a semi-folded position.
La figure 7 est une représentation du même ensemble de grue dans la position totalement pliée.Figure 7 is a representation of the same crane assembly in the fully folded position.
La figure 8 est une représentation de l'ensemble d'une grue classique dans la position pliée.Figure 8 is a representation of the assembly of a conventional crane in the folded position.
La figure 9 est la représentation de l'ensemble de la grue conforme à l'objet de l'invention dans la position dépliée.Figure 9 is the representation of the entire crane according to the object of the invention in the unfolded position.
La figure 10 est une représentation de la partie inférieure de la grue selon la solution préconisée dans une variante de réalisation selon laquelle le cylindre actionneur du pliage et du dépliage est disposé entre la plate-forme tournante et le support du contrepoids.Figure 10 is a representation of the lower part of the crane according to the solution recommended in an alternative embodiment according to which the actuator cylinder for folding and unfolding is disposed between the rotating platform and the counterweight support.
La figure 11 est une représentation schématique de l'ensemble semi-plié de la grue conforme à cette réalisation de la figure précédente.Figure 11 is a schematic representation of the semi-folded assembly of the crane according to this embodiment of the previous figure.
- 1. Support du contrepoids1. Counterweight support
- 2. Corps supérieurs du contrepoids2. Upper bodies of the counterweight
- 3. Corps inférieur du contrepoids3. Lower body of the counterweight
- 4. Segment supérieur de la tour articulée4. Upper segment of the articulated tower
- 5. Bagues5. Rings
- 6. Barres de fixation6. Fastening bars
- 7. Ecrou de retenue7. Retaining nut
- 8. Oreilles8. Ears
- 9. Axe9. Axis
- 10. Bielles10. Connecting rods
- 11. Axe11. Axis
- 12. Segment inférieur de la tour articulée12. Lower segment of the articulated tower
- 13. Montants13. Amounts
- 14. Plate-forme tournante14. Rotating platform
- 15. Axe15. Axis
- 16. Axe16. Axis
- 17. Ensemble actionneur du pliage et du dépliage de la grue17. Crane folding and unfolding actuator assembly
- 18. Roues18. Wheels
- 19. Contrepoids classique19. Classic counterweight
- 20. Cylindre actionneur20. Actuator cylinder
- 21. Axe d'articulation21. Axis of articulation
- 22. Axe d'articulation22. Articulation axis
- 23. Bielles23. Connecting rods
L'objet de l'invention consiste en un système de contrepoids basculant pour grues dépliables selon lequel le contrepoids se compose d'un support (1) en forme de "L" sur lequel sont situés les corps (2) et (3) constitutifs du contrepoids proprement dit. Ces corps (2 et 3) sont conçus de manière qu'entre les corps supérieurs (2), il subsiste un vide approprié pour loger le segment supérieur (4) de la tour articulée de la grue dans la position de transport.The object of the invention consists of a tilting counterweight system for foldable cranes according to which the counterweight consists of a support (1) in the form of an "L" on which the constituent bodies (2) and (3) are located. the actual counterweight. These bodies (2 and 3) are designed so that between the upper bodies (2), there remains a suitable vacuum to accommodate the upper segment (4) of the articulated tower of the crane in the transport position.
Le corps inférieur (3) du contrepoids, qui peut être formé d'une seule pièce ou de plusieurs pièces, se trouve directement appuyé sur les poutres longitudinales du support (1) en "L" ; ledit corps (3) étant emboîté (voir figure 5) sur des bagues (5) solidaires des poutres longitudinales précitées du support (1), de telle sorte qu'ainsi ledit corps (3) est bien centré, la fixation de ce corps, en même temps que celle des corps supérieurs (2), s'effectuant au moyen de barres (6) qui s'assemblent par vissage, par une de leurs extrémités, aux bagues (5) précitées tandis que, sur leur autre extrémité, sont montés des écrous (7), de sorte qu'il s'établit ainsi un ensemble monobloc en montage entre le support (1) et les corps respectifs de contrepoids (2) et (3).The lower body (3) of the counterweight, which can be formed in one piece or in several pieces, is directly supported on the longitudinal beams of the support (1) in "L" shape; said body (3) being fitted (see FIG. 5) on rings (5) integral with the above-mentioned longitudinal beams of the support (1), so that thus said body (3) is well centered, the fixing of this body, at the same time as that of the upper bodies (2), effected by means of bars (6) which are assembled by screwing, by one of their ends, to the above-mentioned rings (5) while, on their other end, are mounted nuts (7), so that it establishes a one-piece assembly in mounting between the support (1) and the respective counterweight bodies (2) and (3).
Les poutres longitudinales du support (1) se terminent à leur extrémité libre par des oreilles (8) au moyens desquelles elles s'articulent, sur l'axe (9) à des bielles (10) qui, par leur autre extrémité, s'articulent au moyen de l'axe (11) au segment inférieur (12) de la tour articulée de la grue.The longitudinal beams of the support (1) terminate at their free end by ears (8) by means of which they are articulated, on the axis (9) to connecting rods (10) which, by their other end, s' articulate by means of the axis (11) to the lower segment (12) of the articulated tower of the crane.
Et d'autre part, le support (1) précité s'articule à son tour, au moyen de l'axe (15), et dans une zone plus reculée, à des montants (13) situés dans la partie arrière de la plate-forme tournante (14) de la grue.And on the other hand, the aforementioned support (1) is articulated in turn, by means of the axis (15), and in a more remote area, to uprights (13) located in the rear part of the plate - rotating form (14) of the crane.
Avec tout ceci ainsi disposé, le segment inférieur (12) de la tour articulée, les bielles (10), les poutres longitudinales du support (1) du contrepoids et la plate-forme tournante (14) constituent un quadrilatère déformable à sommets articulés au droit des axes (9), (11) et (15) précités et de l'axe (16). C'est par l'intermédiaire de cet axe (16) que le segment inférieur (12) de la tour articulée s'assemble à la plate-forme tournante (14).With all of this thus arranged, the lower segment (12) of the articulated tower, the connecting rods (10), the longitudinal beams of the support (1) of the counterweight and the rotating platform (14) constitute a deformable quadrilateral with vertices articulated at right of the axes (9), (11) and (15) above and of the axis (16). It is via this axis (16) that the lower segment (12) of the articulated tower is assembled to the platform. rotating (14).
De cette façon, dans la position repliée ou de transport, comme on l'observe sur la figure 7, le segment supérieur (4) de la tour articulée s'appuie sur le corps inférieur (3) du contrepoids, en se logeant entre les corps supérieurs (2) de ce dernier ; cependant que le corps inférieur précité (3) du contrepoids se loge entre le segment supérieur (4) de la tour articulée et la plate-forme tournante (14) et que les corps (2) occupent les espaces libres situés sur les côtés du segment supérieur (4) précité de la tour.In this way, in the folded or transport position, as can be seen in FIG. 7, the upper segment (4) of the articulated tower rests on the lower body (3) of the counterweight, being housed between the upper bodies (2) of the latter; however that the aforesaid lower body (3) of the counterweight is housed between the upper segment (4) of the articulated tower and the rotating platform (14) and that the bodies (2) occupy the free spaces located on the sides of the segment upper (4) above of the tower.
Dans ces conditions, lorsque s'effectue le dépliage de la grue, par actionnement de l'ensemble (17) de tirants et de bielles destinés à réaliser cette opération, c'est-à-dire au moment où se produit l'élévation du segment inférieur (12) de la tour, en tournant sur l'axe (16), par l'intermédiaire des bielles (10), ceci provoque un basculement simultané de l'ensemble du contrepoids, en tournant sur l'axe (15) correspondant, comme on le voit sur la figure 6.Under these conditions, when the crane is unfolded, by actuation of the assembly (17) of tie rods and connecting rods intended to perform this operation, that is to say at the time when the elevation of the lower segment (12) of the tower, by turning on the axis (16), by means of the connecting rods (10), this causes a simultaneous tilting of the whole of the counterweight, by turning on the axis (15) corresponding, as seen in Figure 6.
Et, lorsque le processus de dépliage se poursuit jusqu'à son terme, lorsque la tour de la grue atteint sa position entièrement verticale, comme on le voit sur la figure 9, l'ensemble du contrepoids se trouve dans sa position de travail correcte, en arrière de la grue, position qui correspond à une situation verticale de l'ensemble précité du contrepoids. Pour obtenir ce résultat, on a prévu ce que doit être la dimension longitudinale des bielles (10).And, when the unfolding process continues to its end, when the crane tower reaches its fully vertical position, as seen in Figure 9, the entire counterweight is in its correct working position, behind the crane, position which corresponds to a vertical situation of the aforementioned set of counterweights. To obtain this result, provision has been made for what must be the longitudinal dimension of the connecting rods (10).
Selon une variante de réalisation pratique, on prévoit que le cylindre (20) dont l'actionnement produit le pliage et le dépliage de la grue, se trouve, comme on peut l'observer sur les figures 10 et 11, entre la plate-forme tournante (14) et le support (1) du contrepoids, avec articulation d'une de ses extrémités sur la structure de la plate-forme tournante (14) précitée au moyen d'un axe (21) et avec montage articulé de son autre extrémité sur la traverse frontale du support précité (1) du contrepoids au moyen d'un axe (22).According to a practical embodiment, it is provided that the cylinder (20), the actuation of which produces the folding and unfolding of the crane, is, as can be seen in FIGS. 10 and 11, between the platform rotating (14) and the support (1) of the counterweight, with articulation of one of its ends on the structure of the aforementioned rotating platform (14) by means of an axis (21) and with articulated mounting of its other end on the front crosspiece of the aforementioned support (1) of the counterweight by means of an axis (22).
Et, d'autre part, la traverse frontale précitée du support (1) du contrepoids s'assemble, de son côté, à l'aide de bielles (23) qui sont articulées à l'ensemble d'actionnement (17) qui est étudié pour assurer la mobilité simultanée des deux segments articulés (4 et 12) de la tour pliable.And, on the other hand, the aforementioned front crosspiece of the support (1) of the counterweight assembles, for its part, using connecting rods (23) which are articulated to the actuating assembly (17) which is designed to ensure the simultaneous mobility of the two articulated segments (4 and 12) of the foldable tower.
Avec tout ceci, l'actionnement du cylindre (20) fait basculer le contrepoids, en rabattement ou relevage pour le placer dans ses positions respectives, de transport ou de travail, cependant que ledit basculement du contrepoids provoque, à l'aide des bielles (10),la possibilité simultanée de rabattement ou de relevage du segment inférieur (12) de la tour et, à l'aide des bielles (23), il actionne à son tour l'ensemble (17) d'actionnement entre les deux segments (4 et 12) de la tour, de sorte que, conjointement avec cette possibilité de rabattement et de relevage du contrepoids, on produit automatiquement le pliage ou le dépliage de la tour.With all of this, the actuation of the cylinder (20) causes the counterweight to tilt, in folding or lifting to place it in its respective positions, for transport or work, while said tilting of the counterweight causes, using the connecting rods ( 10), the simultaneous possibility of folding or lifting the lower segment (12) of the tower and, using the connecting rods (23), it in turn actuates the assembly (17) of actuation between the two segments (4 and 12) of the tower, so that, together with this possibility of folding and lifting the counterweight, the tower is automatically folded or unfolded.
De cette façon, on obtient le même effet qu'avec la forme de réalisation décrite précédemment, dans laquelle le cylindre actionneur (20) était situé entre le segment inférieur (12) de la tour et l'ensemble d'actionnement (17) entre les deux parties articulées (4 et 12) de la tour. Ceci revient à dire que, grâce au seul actionnement du cylindre actionneur (20) précité, on produit simultanément le positionnement du contrepoids dans ses positions respectives, de travail ou de transport, et le dépliage ou repliage résultant de la structure de la tour, pour ces situations de travail ou de transport ; en obtenant en outre avec cette nouvelle réalisation un positionnement plus avantageux du cylindre actionneur (20) précité pour que son poids ne soit pas préjudiciable dans ces positions de la grue, cependant qu'ainsi, en supplément, la partie intérieure de la grue reste libre, par exemple pour y loger une échelle d'accès.In this way, the same effect is obtained as with the embodiment described above, in which the actuating cylinder (20) was located between the lower segment (12) of the tower and the actuating assembly (17) between the two articulated parts (4 and 12) of the tower. This amounts to saying that, by the sole actuation of the aforementioned actuating cylinder (20), the positioning of the counterweight in its respective working or transport positions is simultaneously produced, and the unfolding or folding resulting from the structure of the tower, for these work or transportation situations; by further obtaining with this new embodiment a more advantageous positioning of the aforementioned actuating cylinder (20) so that its weight is not detrimental in these positions of the crane, however that thus, in addition, the interior part of the crane remains free, for example to accommodate an access ladder.
Tout le mécanisme de réalisation pratique du système préconisé a été décrit conformément à ce qui précède, à titre d'exemple d'application, pour le cas d'une grue repliable du type à ciseaux mais, naturellement, il ne constitue absolument pas une application limitative puisque le système en question peut de même être appliqué à n'importe quel type de grue repliable en général, où il est susceptible d'établir une corrélation de mobilité synchronisée entre l'ensemble du contrepoids disposé en montage basculant et la structure repliable propre-ment dite de la grue, ce qui constitue en définitive l'essentiel du système préconisé.The entire practical mechanism for producing the recommended system has been described in accordance with the above, by way of example of an application, in the case of a folding crane of the scissor type, but, of course, it is absolutely not an application. limiting since the system in question can likewise be applied to any type of folding crane in general, where it is capable of establishing a correlation of synchronized mobility between the whole of the counterweight disposed in tilting assembly and the own folding structure -ment called crane, which ultimately constitutes the essence of the recommended system.
Et en tout cas, avec ce système objet de l'invention, ce qu'on obtient est que l'ensemble des corps (2) et (3) du contrepoids de la grue occupe tout l'espace disponible entre la structure pliable de la grue et la plate-forme tournante correspondante (14), ce qui permet que tout le contrepoids nécessaire pour le fonctionnement effectif de la grue reste incorporé dans cette position de transport ; cependant que, d'un autre côté, la charge de l'ensemble est répartie de façon appropriée entre les roues (18) avant et arrière de la structure porteuse de transport.And in any case, with this object of the invention system, what we get is that all the bodies (2) and (3) of the counterweight of the crane occupies all the space available between the foldable structure of the crane and the corresponding rotating platform (14), which allows that all the counterweight necessary for the effective operation of the crane remains incorporated in this transport position; however, on the other hand, the load of the assembly is appropriately distributed between the front and rear wheels (18) of the carrying carrying structure.
De cette façon, on évite les inconvénients que présentent sous ces aspects les grues équipées d'un contrepoids classique (19), comme celle représentée sur la figure 1, dans laquelle, comme on peut l'observer sur la figure 8, le contrepoids (19) situé de façon inamovible dans son emplacement de travail, surcharge les roues (18) avant de la structure de transport, en laissant inoccupée une grande partie de l'espace libre entre la structure pliable et la plate-forme tournante (14), ce qui n'implique pas seulement de mauvaises conditions pour le transport puisqu'en outre, dans le cas des grues de grandes dimensions, peut être incluse l'obligation de démontage d'au moins une partie du contrepoids (19) pour que le transport soit réalisable, ce qui, dans ce cas, suppose un grand préjudice pour la simplicité et la rapidité du montage et du démontage de la grue.In this way, the drawbacks presented by these aspects of cranes fitted with a conventional counterweight (19), such as that shown in FIG. 1, in which, as can be seen in FIG. 8, are avoided ( 19) located in an immovable manner in its working location, overloads the front wheels (18) of the transport structure, leaving a large part of the free space between the foldable structure and the rotating platform (14) unoccupied, which does not only imply bad conditions for transport since, in addition, in the case of large cranes, the obligation to dismantle at least part of the counterweight (19) can be included so that transport is possible, which, in this case, assumes great prejudice for the simplicity and speed of assembly and disassembly of the crane.
Claims (3)
- A crane of the type comprising a rotary platform (14) and a tower structure having a bottom segment (12) hinged to the front portion of said rotary platform (14) and a top segment (4) hinged to said bottom segment (12), said tower structure being capable of being put in a working position in which the bottom segment (12) and the top segment are vertically above the front portion of said rotary platform (14) and in line with each other, and being capable of being put in a transport position in which the bottom segment (4) extends substantially horizontally in front of said platform and the top segment (4) is folded over said bottom segment (12) and said platform (14),
means (17, 20) for folding and unfolding said tower structure; and
a counterweight (19) carried by said platform (14) and designed to provide said crane with stability when in the working position;
the crane being characterized by the fact that:
the counterweight (19) is hinged on one side to the rear portion of the platform (14) and on the other side to connecting rods (10) themselves hinged to the bottom segment (12) of the tower structure, the counterweight (19), the connecting rods (10), the bottom segment (12), and the rotary platform (14) together forming a deformable hinged quadrilateral on tilting of the bottom segment under drive from the folding and unfolding means, the hinge axes (9, 11, 15, 16) of said quadrilateral being disposed in such a manner that, in the transport position, the counterweight (19) is folded onto the rotary platform (14), and in the working position, the counterweight (19) takes up a vertical position on the rear portion of the rotary platform (14). - A crane according to claim 1, characterized by the fact that the counterweight (19) includes a support (1) hinged to the rotary platform (14) and to the connecting rods (10), a bottom body (3) fixed to said support (1), and two top bodies (2) mounted longitudinally and defining between them a space for receiving the top segment (4) of the tower structure in the transport position.
- A crane according to claim 2, characterized in that the means for folding and unfolding the tower structure comprise an actuator cylinder (20) hinged between respective points (21) and (22) of the rotary platform (14) and of the counterweight support (1), an actuator assembly (17) enabling both segments (4, 12) of the tower structure and the connecting rods (23) connecting said support (1) to said actuator assembly to move simultaneously, said actuator cylinder (20) serving to tilt the counterweight (19) between the working position and the rest position, and the movement of the counterweight (19) ensuring simultaneous folding and unfolding of the tower structure by means of the connecting rods (10) which connect said support (1) to the bottom segment (12) and of connecting rods (23) which connect said support (1) to said actuator assembly (17).
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES9100941 | 1991-04-12 | ||
| ES9100941A ES2036912B1 (en) | 1991-04-12 | 1991-04-12 | TILTING COUNTERWEIGHT SYSTEM FOR DEPLOYABLE CRANES. |
| ES09101965A ES2054535B1 (en) | 1991-04-12 | 1991-09-02 | IMPROVEMENTS IN THE SUBJECT OF THE MAIN PATENT N 9100941 FOR "TILTING COUNTERWEIGHT SYSTEM FOR DEPLOYABLE CRANES". |
| ES9101965 | 1991-09-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0508907A1 EP0508907A1 (en) | 1992-10-14 |
| EP0508907B1 true EP0508907B1 (en) | 1996-08-28 |
Family
ID=26154533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP92401020A Expired - Lifetime EP0508907B1 (en) | 1991-04-12 | 1992-04-10 | Tilting counterweight arrangement for deployable cranes |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0508907B1 (en) |
| AT (1) | ATE141899T1 (en) |
| DE (1) | DE69213071T2 (en) |
| ES (1) | ES2054535B1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2903095B1 (en) * | 2006-06-29 | 2008-08-22 | Potain Soc Par Actions Simplif | MOBILE LEST DEVICE FOR TRANSPORTABLE TOWER CRANE |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB272286A (en) * | 1926-03-09 | 1927-06-09 | William Edwin Wright | Improvements in and relating to cranes |
| GB327478A (en) * | 1929-01-17 | 1930-04-10 | Claude Martineau Toplis | Improvement in jib cranes |
| GB1055114A (en) * | 1965-03-30 | 1967-01-18 | Schwermaschb Kirow Veb | Improvements in or relating to cover arrangements on jib cranes |
| DE1267395B (en) * | 1966-08-12 | 1968-05-02 | Hans Tax | Luffing crane |
| FR2096646B1 (en) * | 1970-04-07 | 1974-10-31 | Noly Jean | |
| US3924753A (en) * | 1974-04-22 | 1975-12-09 | Case Co J I | Crane counterweight support and means for removing and mounting same |
| FR2605619B1 (en) * | 1986-10-27 | 1989-03-31 | Potain Sa | FOLDABLE MACHINE FOR HANDLING AND LIFTING LOADS |
| ES2013027A6 (en) * | 1989-02-20 | 1990-04-16 | Munazarriz Aldaz Alberto | Foldable crane with scissors-type tower |
-
1991
- 1991-09-02 ES ES09101965A patent/ES2054535B1/en not_active Expired - Fee Related
-
1992
- 1992-04-10 EP EP92401020A patent/EP0508907B1/en not_active Expired - Lifetime
- 1992-04-10 AT AT92401020T patent/ATE141899T1/en not_active IP Right Cessation
- 1992-04-10 DE DE69213071T patent/DE69213071T2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| ATE141899T1 (en) | 1996-09-15 |
| ES2054535B1 (en) | 1995-08-01 |
| ES2054535A1 (en) | 1994-08-01 |
| DE69213071D1 (en) | 1996-10-02 |
| EP0508907A1 (en) | 1992-10-14 |
| DE69213071T2 (en) | 1997-03-06 |
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