EP0578545B1 - Load lifting device - Google Patents
Load lifting device Download PDFInfo
- Publication number
- EP0578545B1 EP0578545B1 EP93401714A EP93401714A EP0578545B1 EP 0578545 B1 EP0578545 B1 EP 0578545B1 EP 93401714 A EP93401714 A EP 93401714A EP 93401714 A EP93401714 A EP 93401714A EP 0578545 B1 EP0578545 B1 EP 0578545B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- load
- pulley
- pulleys
- cables
- support
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/54—Safety gear
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
- B66C13/06—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for minimising or preventing longitudinal or transverse swinging of loads
Definitions
- the present invention relates to a load handling device.
- the invention relates to high security handling devices intended to be used in particular on hazardous sites such as nuclear power plants, for example for handling fuel elements.
- two-strand handling devices which comprise a winch provided with at least one winding drum around which the first ends of two support cables are wound symmetrically, the second end of each of these passing through a hauled pulley and being connected to one end of a safety balancing spreader, forming a fixed point, the hauled pulleys being connected to a load support yoke.
- the reeved pulleys are arranged opposite one another.
- each cable passes over a reeved pulley, over a deflection pulley and over another reeved pulley disposed of the other side of the load support yoke and is connected to one end of a safety balancer.
- the object of the invention is therefore to solve these problems by proposing a load handling device which is simple, reliable and which makes it possible to maintain the load in position and to prevent it from swinging, in particular in the event of one of the support cables.
- the subject of the invention is a device for handling a load, according to claim 1.
- each of these passes through a reeved pulley 5 and 6 respectively and is connected to one end of a safety balancing spreader 7 forming a fixed point.
- this type of device has a certain number of drawbacks in controlling the swinging of the load, in particular in the event of one of the support cables breaking.
- These devices also include a winch 10 provided with a winding drum 11 around which the first ends of two support cables 12 and 13 are wound symmetrically.
- each of these cables passes through a first reeved pulley 14, around a deflection pulley 15 and through a second reeved pulley 16 and is connected to one end of a safety balancing spreader 17.
- the other cable 13 follows a similar path around a first reeved pulley 18, a deflection pulley 19 and a second reeved pulley 20 to the other end of the safety balancing lifter 17.
- first and second reeved pulleys adapted to cooperate with each cable are arranged parallel and symmetrically in the load support yoke shown diagrammatically by an arrow 21 in this Fig. 2.
- This structure makes it possible to obtain good holding in position and to avoid the rocking of the load, but is relatively complex as has been explained previously.
- FIG.3 there is shown a block diagram of an embodiment of a device according to the invention.
- This device always includes a winch 25 provided with at least one winding drum 26 around which the first ends of two support cables 27 and 28 are wound symmetrically.
- each of these cables passes through a reeved pulley respectively 29 or 30 and is connected to one end of a safety balancing lifting beam 31.
- reeved pulleys 29 and 30 are connected to a load support yoke which will be described in more detail below and which comprises, for example, a load support hook 32.
- the pulleys 29 and 30 are arranged one above the other and are angularly offset from one another.
- the two cables descend in the direction of the muffle and cross at the level thereof to pass around each of the pulleys 29 and 30 and then go up towards the balancing spreader on which their second ends are permanently fixed, this spreader constituting a fixed point of conventional type.
- this structure makes it possible to maintain the load and the whole of the block in a vertical position and prevents it from rocking in the event of one of the two support cables breaking.
- the winch drum comprises for example conventional winding means with a thread on the left for one of the cables. and winding means with a net on the right for the other cable.
- each end of the balancing spreader 31 can for example be associated with stop or position detection means constituted for example by a limit switch push button, and designated by the general reference 33.
- FIG.5 and 6 there is shown an embodiment of a load support yoke forming part of a device according to the invention.
- the pulleys 29 and 30 are rotatably mounted between two flanges 35 and 36 of this yoke 37, by means of guide shafts 38 and 39 respectively. At its lower end, this yoke includes the load support hook 32 previously mentioned.
- the assembly always remains balanced even in the event of a break in one of the two support cables insofar as the axis of this hook, that is to say in this case the vertical axis, passes through the axis of the two pulleys.
- the pulleys are offset angularly by an angle approximately equal to 30 ° relative to each other, that is to say that they are offset each at an angle approximately equal to 15 ° on either side of the longitudinal plane of symmetry of the screed.
- the device according to the invention is particularly well suited for handling loads with a high degree of security because it provides redundancy for keeping these loads in position and can be used in extremely small spaces such as for example tubes or the like.
Abstract
Description
La présente invention concerne un dispositif de manutention d'une charge.The present invention relates to a load handling device.
Plus particulièrement, l'invention se rapporte à des dispositifs de manutention de haute sécurité destinés à être utilisés en particulier sur des sites à risques tels que des centrales nucléaires, par exemple pour la manutention d'éléments combustibles.More particularly, the invention relates to high security handling devices intended to be used in particular on hazardous sites such as nuclear power plants, for example for handling fuel elements.
On sait en effet que ces dispositifs doivent d'une part assurer le maintien et d'autre part éviter le balancement des charges, en cas de rupture d'un câble de support.It is known in fact that these devices must on the one hand ensure the maintenance and on the other hand avoid the swinging of the loads, in the event of a rupture of a support cable.
On connaît déjà dans l'état de la technique des dispositifs de manutention à deux fois deux brins qui comportent un treuil muni d'au moins un tambour d'enroulement autour duquel s'enroulent symétriquement des premières extrémités de deux câbles de support, la seconde extrémité de chacun de ceux-ci passant dans une poulie mouflée et étant reliée à une extrémité d'un palonnier d'équilibrage de sécurité, formant un point fixe, les poulies mouflées étant reliées à une chape de support de charge.There are already known in the prior art two-strand handling devices which comprise a winch provided with at least one winding drum around which the first ends of two support cables are wound symmetrically, the second end of each of these passing through a hauled pulley and being connected to one end of a safety balancing spreader, forming a fixed point, the hauled pulleys being connected to a load support yoke.
Dans ces dispositifs connus, les poulies mouflées sont disposées en regard l'une de l'autre.In these known devices, the reeved pulleys are arranged opposite one another.
Bien que ces dispositifs permettent d'assurer un maintien de la charge en cas de rupture de l'un des câbles, ils ne peuvent en aucun cas éviter le balancement de celle-ci, ce qui peut poser un certain nombre de problèmes.Although these devices make it possible to maintain the load in the event of one of the cables breaking, they cannot in any case prevent it from swinging, which can cause a certain number of problems.
Pour résoudre ces problèmes de balancement de charge, on a également développé dans l'état de la technique, des dispositifs de manutention à deux fois quatre brins.To resolve these load balancing problems, handling devices with two times four strands have also been developed in the state of the art.
Dans ces dispositifs, la seconde extrémité de chaque câble passe sur une poulie mouflée, sur une poulie de renvoi et sur une autre poulie mouflée disposée de l'autre côté de la chape de support de charge et est reliée à une extrémité d'un palonnier d'équilibrage de sécurité.In these devices, the second end of each cable passes over a reeved pulley, over a deflection pulley and over another reeved pulley disposed of the other side of the load support yoke and is connected to one end of a safety balancer.
Ces dispositifs assurent un maintien de la charge en cas de rupture de l'un des câbles et évitent le balancement de la charge, mais présentent une structure relativement complexe et un encombrement et un poids relativement importants.These devices maintain the load in the event of a break in one of the cables and prevent the load from swinging, but have a relatively complex structure and a relatively large size and weight.
Par ailleurs, le document DE-A-28.44.187 et l'article de E.O. Schneidersmann "Serienhebezeuge für erhöhte Sicherheitsanförderungen" publié dans Fördern und Heben, vol. 40, n°. 7, juillet 1990, pages 511-513, Mainz, Allemagne décrivent des dispositifs comportant les caractéristiques du préambule de la revendication. Ces dispositifs comportent en outre deux treuils munis chacun d'un tambour pour l'enroulement des cables.In addition, document DE-A-28.44.187 and the article by E.O. Schneidersmann "Serienhebezeuge für erhöhte Sicherheitsanförderungen" published in Fördern und Heben, vol. 40, no. 7, July 1990, pages 511-513, Mainz, Germany describe devices having the features of the preamble of the claim. These devices also include two winches each provided with a drum for winding cables.
Le but de l'invention est donc de résoudre ces problèmes en proposant un dispositif de manutention de charge qui soit simple, fiable et qui permette de maintenir la charge en position et d'éviter son balancement notamment en cas de rupture de l'un des câbles de support.The object of the invention is therefore to solve these problems by proposing a load handling device which is simple, reliable and which makes it possible to maintain the load in position and to prevent it from swinging, in particular in the event of one of the support cables.
A cet effet, l'invention a pour objet un dispositif de manutention d'une charge, selon la revendication 1.To this end, the subject of the invention is a device for handling a load, according to claim 1.
L'invention sera mieux comprise à l'aide de la description qui va suivre, donnée uniquement à titre d'exemple et faite en se référant aux dessins annexés, sur lesquels :
- les Fig.1 et 2 représentent de façon schématique deux exemples de réalisation de dispositifs de manutention de l'état de la technique;
- la Fig.3 représente de façon schématique un dispositif de manutention selon l'invention;
- la Fig.4 représente une vue en perspective d'un détail de la Fig.3; et
- les Fig.5 et 6 représentent des vues partiellement en coupe respectivement de face et de dessus d'une chape entrant dans la constitution d'un dispositif selon l'invention.
- Fig.1 and 2 show schematically two exemplary embodiments of handling devices of the prior art;
- Fig.3 shows schematically a handling device according to the invention;
- Fig.4 shows a perspective view of a detail of Fig.3; and
- Fig.5 and 6 show views partially in section respectively of the front and from above of a yoke forming part of a device according to the invention.
Ainsi qu'on l'a mentionné précédemment, il existe déjà dans l'état de la technique des dispositifs de manutention de charge à deux fois deux brins qui comportent un treuil désigné de façon générale par la référence 1 sur la Fig.1, muni d'au moins un tambour d'enroulement 2 autour duquel s'enroulent symétriquement des premières extrémités de deux câbles de support 3 et 4.As mentioned previously, there already exist in the state of the art load handling devices with two strands twice which comprise a winch generally designated by the reference 1 in FIG. 1, provided at least one winding drum 2 around which the first ends of two
La seconde extrémité de chacun de ceux-ci passe dans une poulie mouflée respectivement 5 et 6 et est reliée à une extrémité d'un palonnier d'équilibrage de sécurité 7 formant un point fixe.The second end of each of these passes through a reeved
Ces poulies mouflées sont disposées parallèlement et en regard l'une de l'autre et sont reliées à une chape de support de charge schématisée par la flèche 8 sur cette figure 1.These reeved pulleys are arranged in parallel and facing each other and are connected to a load support yoke shown diagrammatically by the
Ainsi qu'on l'a indiqué précédemment, ce type de dispositifs présente un certain nombre d'inconvénients au niveau du contrôle du balancement de la charge notamment en cas de rupture de l'un des câbles de support.As indicated above, this type of device has a certain number of drawbacks in controlling the swinging of the load, in particular in the event of one of the support cables breaking.
Pour résoudre ces problèmes, on a développé des dispositifs à deux fois quatre brins présentant une structure plus complexe telle que celle représentée sur la Fig.2.To solve these problems, devices with twice four strands have been developed having a more complex structure such as that shown in FIG. 2.
Ces dispositifs comportent également un treuil 10 muni d'un tambour d'enroulement 11 autour duquel s'enroulent symétriquement des premières extrémités de deux câbles de support 12 et 13.These devices also include a winch 10 provided with a winding
La seconde extrémité de chacun de ces câbles passe dans une première poulie mouflée 14, autour d'une poulie de renvoi 15 et dans une seconde poulie mouflée 16 et est reliée à une extrémité d'un palonnier d'équilibrage de sécurité 17.The second end of each of these cables passes through a first reeved
L'autre câble 13 suit un trajet analogue autour d'une première poulie mouflée 18, d'une poulie de renvoi 19 et d'une seconde poulie mouflée 20 jusqu'à l'autre extrémité du palonnier d'équilibrage de sécurité 17.The
On notera que les premières et secondes poulies mouflées adaptées pour coopérer avec chaque câble sont disposées parallèlement et symétriquement dans la chape de support de charge schématisée par une flèche 21 sur cette Fig.2.It will be noted that the first and second reeved pulleys adapted to cooperate with each cable are arranged parallel and symmetrically in the load support yoke shown diagrammatically by an
Cette structure permet d'obtenir un bon maintien en position et d'éviter le balancement de la charge, mais est relativement complexe comme cela a été expliqué précédemment.This structure makes it possible to obtain good holding in position and to avoid the rocking of the load, but is relatively complex as has been explained previously.
Sur la Fig.3, on a représenté un schéma synoptique d'un mode de réalisation d'un dispositif selon l'invention.In Fig.3, there is shown a block diagram of an embodiment of a device according to the invention.
Ce dispositif comporte toujours un treuil 25 muni d'au moins un tambour d'enroulement 26 autour duquel s'enroulent symétriquement des premières extrémités de deux câbles de support 27 et 28.This device always includes a
La seconde extrémité de chacun de ces câbles passe dans une poulie mouflée respectivement 29 ou 30 et est reliée à une extrémité d'un palonnier d'équilibrage de sécurité 31.The second end of each of these cables passes through a reeved pulley respectively 29 or 30 and is connected to one end of a safety
Ces poulies mouflées 29 et 30 sont reliées à une chape de support de charge qui sera décrite plus en détail par la suite et qui comporte par exemple un crochet de support de charge 32.These reeved
Selon l'invention, les poulies mouflées 29 et 30 sont disposées l'une au-dessus de l'autre et sont décalées angulairement l'une par rapport à l'autre.According to the invention, the
Ainsi, les deux câbles descendent en direction de la moufle et se croisent au niveau de celle-ci de façon à passer autour de chacune des poulies 29 et 30 puis remontent en direction du palonnier d'équilibrage sur lequel leurs secondes extrémités sont fixées de façon permanente, ce palonnier constituant un point fixe de type classique.Thus, the two cables descend in the direction of the muffle and cross at the level thereof to pass around each of the
On conçoit donc que cette structure permet d'assurer le maintien de la charge et de l'ensemble de la moufle dans une position verticale et évite le balancement de celle-ci en cas de rupture de l'un des deux câbles de support.It is therefore understandable that this structure makes it possible to maintain the load and the whole of the block in a vertical position and prevents it from rocking in the event of one of the two support cables breaking.
On a indiqué précédemment que les premières extrémités des deux câbles s'enroulent de façon symétrique autour du tambour du treuil et dans ce but, celui-ci comporte par exemple des moyens classiques d'enroulement avec un filet à gauche pour l'un des câbles et des moyens d'enroulement avec un filet à droite pour l'autre câble.It was previously indicated that the first ends of the two cables are wound symmetrically around the winch drum and for this purpose, the latter comprises for example conventional winding means with a thread on the left for one of the cables. and winding means with a net on the right for the other cable.
Comme on peut le voir sur la Fig.4, chaque extrémité du palonnier d'équilibrage 31 peut par exemple être associée à des moyens de butée ou de détection de position constitués par exemple par un bouton poussoir de fin de course, et désignés par la référence générale 33.As can be seen in FIG. 4, each end of the
Sur les Fig.5 et 6, on a représenté un exemple de réalisation d'une chape de support de charge entrant dans la constitution d'un dispositif selon l'invention.On Fig.5 and 6, there is shown an embodiment of a load support yoke forming part of a device according to the invention.
Les poulies mouflées 29 et 30 sont montées à rotation entre deux flasques 35 et 36 de cette chape 37, par l'intermédiaire d'arbres de guidage respectivement 38 et 39. A son extrémité inférieure, cette chape comporte le crochet de support de charge 32 mentionné précédemment.The
On conçoit donc que l'ensemble reste toujours équilibré même en cas de rupture de l'un des deux câbles de support dans la mesure où l'axe de ce crochet, c'est à dire dans ce cas l'axe vertical, passe par l'axe des deux poulies mouflées.It is therefore understandable that the assembly always remains balanced even in the event of a break in one of the two support cables insofar as the axis of this hook, that is to say in this case the vertical axis, passes through the axis of the two pulleys.
Dans le mode de réalisation décrit sur ces figures 5 et 6, les poulies mouflées sont décalées angulairement d'un angle à peu près égal à 30° l'une par rapport à l'autre, c'est à dire qu'elles sont décalées chacune d'un angle à peu près égal à 15° de part et d'autre du plan de symétrie longitudinal de la chape.In the embodiment described in these Figures 5 and 6, the pulleys are offset angularly by an angle approximately equal to 30 ° relative to each other, that is to say that they are offset each at an angle approximately equal to 15 ° on either side of the longitudinal plane of symmetry of the screed.
Cependant, d'autres décalages angulaires peuvent être envisagés, ces décalages pouvant aller par exemple jusqu'à un angle de l'ordre de 90°.However, other angular offsets can be envisaged, these offsets being able to go for example up to an angle of the order of 90 °.
On conçoit donc que le dispositif selon l'invention est particulièrement bien adapté pour la manutention de charges avec un haut degré de sécurité car il assure une redondance pour le maintien en position de ces charges et peut être utilisé dans des espaces extrêmement réduits comme par exemple des tubes ou autres.It can therefore be seen that the device according to the invention is particularly well suited for handling loads with a high degree of security because it provides redundancy for keeping these loads in position and can be used in extremely small spaces such as for example tubes or the like.
Claims (3)
- Load-handling device, of the type comprising two support cables (27, 28) passing through a pulley block (29, 30), and one end of which is connected to one end of a safety balancing lifting beam (31), the pulley blocks (29, 30) being connected to a load-supporting crosspiece (37), and being disposed one above the other and offset angularly one relative to the other, characterised in that it comprises a winch fitted with a single winding drum (26) around which the other ends of the two support cables (27, 28) are symmetrically wound.
- Device according to claim 1, characterised in that the pulley blocks are offset by an angle less than or equal to 90°.
- Device according to claim 2, characterised in that the pulley blocks are each offset by an angle approximately equal to 15° on either side of the longitudinal plane of symmetry of the crosspiece.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9208390 | 1992-07-07 | ||
| FR929208390A FR2693447B1 (en) | 1992-07-07 | 1992-07-07 | Load handling device. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0578545A1 EP0578545A1 (en) | 1994-01-12 |
| EP0578545B1 true EP0578545B1 (en) | 1997-09-24 |
Family
ID=9431647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP93401714A Expired - Lifetime EP0578545B1 (en) | 1992-07-07 | 1993-07-01 | Load lifting device |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0578545B1 (en) |
| AT (1) | ATE158563T1 (en) |
| DE (1) | DE69314105D1 (en) |
| FR (1) | FR2693447B1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2311052A (en) * | 1996-03-12 | 1997-09-17 | Metallifacture Ltd | Support for a spare wheel using two parallel cables |
| CN104495665B (en) * | 2014-12-02 | 2017-01-11 | 河南省矿山起重机有限公司 | Hoisting device of crane, pulley beam of crane and crane |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU483825A3 (en) * | 1970-03-07 | 1975-09-05 | Хеш Машиненфабрик Дейчланд Аг (Фирма) | Lifting gear |
| US3786935A (en) * | 1972-05-22 | 1974-01-22 | Whiting Corp | Overhead crane |
| FR2290383A1 (en) * | 1974-11-08 | 1976-06-04 | Commissariat Energie Atomique | Crane with travelling gantry - has crab with two contra-rotating drums unwinding hoist ropes in loops |
| DE2844187A1 (en) * | 1978-10-11 | 1980-04-24 | Noell Gmbh | Safety double cable lifting tackle - has two parallel winding drums with lifting cables for two pulleys, crossing diagonally |
| DE3130160C2 (en) * | 1981-07-30 | 1983-11-03 | Wiener Brückenbau- und Eisenkonstruktions-AG, Wien | Rigid rope guide for a hoist |
| US4721286A (en) * | 1985-07-24 | 1988-01-26 | Amca International Corporation | Split block for extended travel |
-
1992
- 1992-07-07 FR FR929208390A patent/FR2693447B1/en not_active Expired - Fee Related
-
1993
- 1993-07-01 AT AT93401714T patent/ATE158563T1/en not_active IP Right Cessation
- 1993-07-01 EP EP93401714A patent/EP0578545B1/en not_active Expired - Lifetime
- 1993-07-01 DE DE69314105T patent/DE69314105D1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| FR2693447A1 (en) | 1994-01-14 |
| FR2693447B1 (en) | 1994-09-30 |
| DE69314105D1 (en) | 1997-10-30 |
| EP0578545A1 (en) | 1994-01-12 |
| ATE158563T1 (en) | 1997-10-15 |
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