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Dokumentenidentifikation EP1213255 09.08.2007
EP-Veröffentlichungsnummer 0001213255
Titel Winde angetrieben durch einen drehbar angeordeten Zylinder
Anmelder Maritime Pusnes AG, Arendal, NO
Erfinder Hovik, Jon, 4818 Faervik, NO;
Siring, Knut T., 4849 Arendal, NO
Vertreter derzeit kein Vertreter bestellt
DE-Aktenzeichen 60129099
Vertragsstaaten DE, ES, FI, GB, IT, NL
Sprache des Dokument EN
EP-Anmeldetag 10.12.2001
EP-Aktenzeichen 016602252
EP-Offenlegungsdatum 12.06.2002
EP date of grant 27.06.2007
Veröffentlichungstag im Patentblatt 09.08.2007
IPC-Hauptklasse B66D 1/72(2006.01)A, F, I, 20051017, B, H, EP
IPC-Nebenklasse B63B 21/18(2006.01)A, L, I, 20051017, B, H, EP   

Beschreibung[en]

The present invention concerns a device for heaving in and paying out chains using one or more hydraulic cylinders which, by means of gripping and locking devices, grip the chain and lift or lower it a little while the locking device is disengaged. When the cylinder approaches the other end of its stroke, the locking device is re-engaged, the gripping device is released from the chain and, after the hydraulic cylinder has returned to its initial position, the gripping device is ready to grip again.

Several such types of linear winches for chains exist. They usually consist of three separate units:

  • A locking device for chains.
  • A cylinder device connected to a gripping device for the chain. The cylinder device can lift or lower the chain a little more than two chain links.
  • A 180° guide device for the chain which is raised/lowered vertically back to a parallel vertical direction towards a box or similar for storing the chain.

The locking device and gripping device are often arranged according to the same principle: one or two pawls which engage with every other chain link using the force of gravity, springs or similar. When the chain is lifted, the pawl(s) move aside, but the pawl(s) will fall back in place when the chain is lifted two chain links.

Such devices only work for heaving in the chain. If the chain is to be paid out, the pawls in the locking device and gripping device must be operated separately, for example by means of hydraulic auxiliary cylinders.

Jacking devices having two parallel cylinders can give problems regarding the synchronisation thereof, while a device having one cylinder can cause high bending moments on the piston rod. Cylinders where the working pressure acts on the rod side of the piston (the piston rod is pulling) provide reduced power as compared to cylinders where the working pressure acts on the entire piston (the piston rod is pushing).

US patent No. 3.845.935 shows a device where the piston rod is stationary and the gripping device is attached to the cylinder. Since the chain force causes a high bending moment in the piston rod, the latter is very robust. For the cylinder there are provided two bearing supports arranged at a considerable distance from the piston rod, which increases the total length substantially. The patent does not show any 180° guide device for the chain, but this will be necessary if the device is to be used for anchor chains.

In US patent 4.183.502 the bending moment in the piston rod has been avoided by placing the working cylinder centrally between two chains. This will not function properly for two anchor chains which often will have substantially different loads. The locking and gripping device is not pawls, but two parallel bolts pushed in on either side of a chain link in order to lock the link above.

EP-A-0831053 shows a semi-circular guide device for the chain. The guide device is pivotal about a pin near the periphery, and about diagonally thereof an upper pawl is arranged which can lock the chain to the periphery of the guide device, the pawl being supported in the structure of the guide device. A frame supports the pivot pin, a lower chain stopper and a support for a pushing cylinder. The piston rod with its head is supported in the guide device. When the cylinder pivots the guide device, the chain is lifted out of the lower chain stopper until it can hold the chain two links below. When the cylinder pivots the guide device back to its starting position, the chain will slide on the guide device and the upper pawl will grip the chain two links below. The preamble of claim 1 is based on EP-A-0831053 .

The present invention, as defined in claim 1, has some similarities to the device according to EP-A-0831053 . The frame has the same functions: supporting the guide device, holding the lower chain stopper, and supporting the pushing cylinder.

However, there are substantial differences which in many instances can be advantageous: the guide device is a rotatable chain wheel having pockets for the chain, and the pawl co-operates with the pockets and constitutes the upper chain stopper. The pawl is supported in two brackets, one on either side, and the two brackets are supported for rotation about the axis of the chain wheel. The pivot pin which provides support for the pawl in the brackets, may also form the support for the head on the piston rod of the pushing cylinder, although the support for the head may instead be a third pivot pin arranged in the two brackets. The two brackets may possibly be interconnected through a suitable structure.

The device according to EP-A-0831053 has advantages as compared to the other patents discussed above, i.a. as regards space requirements since it has moderate dimensions. The dimensions of the winch according to the present invention may be reduced even further. The diameter of the guide device (the chain wheel) is reduced to less than half. The chain force, which is held by the lower chain stopper when the winch is not in operation, will be transmitted to the upper chain stopper in periods during the operation. The force exerted by the upper chain stopper is transmitted through the two supports in the frame. In an advantageous embodiment according to the invention, the two supports are located at about the same distance from the chain on either side. Consequently, the chain force is held by about one half by each of the two supports in the frame, and the forces may simply be transmitted further to the area of the lower chain stopper. The structure may thereby be made compact where the large loads occur.

An exemplifying embodiment of the invention is shown in the appended figures, where

  • Fig. 1 shows an elevation of a linear winch according to the invention, and
  • Fig. 2 shows the winch of Fig. 1 separated into its two major parts.

Fig. 1 shows the linear winch with the pushing cylinder 5 in the lower position. The bracket 1 which guides the curved stroke of the rod head and the pivot pin 3 for the pawl 2 are shown in broken lines 1A and 3A in the upper position. The pivot pin 3 for the pawl 2 and the centre of the rod head on the cylinder 5 are shown in the same position on the bracket 1, but these two may be separately positioned on the bracket. The bracket 1 is supported on the axle 7 of the chain wheel 6. The axle 7 is fixed or pivotally supported in the frame 8. The cylinder 5 is pivotally supported 4 in the frame 8, and the pawls of the lower chain stopper 10 are also pivotally supported in the frame 8. The auxiliary cylinder 9 for pivoting the pawls of the lower chain stopper 10 is supported in the frame 8. The chain is shown with finer lines and has vertical links 11 and horizontal links 12. In this context, the vertical links 11 lie in the central plane of the chain wheel 6, while the horizontal links 12 are perpendicular thereto.

Fig. 2 shows that the pushing cylinder 5, the bracket 1 and the chain wheel 6 with appurtenant details may be separated from the frame 8 with the lower chain stopper 10. The separable parts which constitute the upper chain stopper and linear winch, may be transported to other frames 8 having a lower chain stopper 10 so that the separable parts may be used for tensioning several chains. In order to facilitate the assembly, a small auxiliary bracket 13 used during transportation is shown.

The operation of a winch according to the invention is as follows:

In the initial position the chain 11, 12 is held by the lower chain stopper 10 and is guided over the chain wheel 6. When the pushing cylinder 5 is activated, the pawl 2 is pushed against the chain 11 and takes over the chain force together with the chain wheel 6. The bracket 1 guides the pivot pin 3 of the pawl 2 in such a way that its pivot follows a pivot circle about the axle 7 of the chain wheel 6. Thus, the relative position of the pawl/chain/chain wheel remains unchanged. The reference circle for the chain 11, 12 becomes about half the pivot circle for the pawl axis and, consequently, the pushing cylinder 5 has to exert a force of about half of the chain force.

When the stroke of the pushing cylinder 5 nears the end, the chain is lifted two links 11, 12, whereupon the pawl in the lower chain stopper 10 click in. The pawl 2 in the upper chain stopper slides on the chain back to the initial position wherein the pawl 2 has a small clearance to the chain 11, thus completing the cycle.

If the chain is paid out, the pawl 2 in the upper chain stopper must be pivoted out of contact with the chain 11 by means of an auxiliary cylinder 9 or the like. The pushing cylinder 5 is operated towards the upper position, and the pawl 2 is pivoted into contact with the chain 11 just before the top position. The pushing cylinder 5 is operated to the top position and thereby takes over the chain pull. The lower chain stopper 10 thereby becomes unloaded, and the pawl in this stopper 10 are pivoted out of contact with the chain 12 by auxiliary cylinder 9 or the like. The pushing cylinder 5 lowers the chain towards the lower position. The pawls in the lower chain stopper 10 are pivoted to contact with the chain 12 and take over the chain force just before the pushing cylinder 5 reaches the lower position. The cycle is thereby completed.


Anspruch[de]
Vorrichtung zum Einhieven und zum Nachlassen einer Kette (11, 12), bestehend aus einem Gestell (8), das eine untere Sperreinrichtung für die Kette aufweist, die mit einer oder mehreren Sperrklinken (10) zum Einrasten der Kette (11, 12) versehen ist, einer Hebevorrichtung (5) für die Kette (11, 12), einer an dem Gestell abgestützte Kettenführung, einer oberen Greifvorrichtung mit mindestens einer Sperrklinke (2) zum Einrasten der Kette (11, 12) in der Kettenführung, welche Sperrklinke an einem Träger (1) abgestützt ist, der um dieselbe Achse drehbar abgestützt ist wie die Kettenführung, wobei die Hebevorrichtung (5) an dem Träger (1) und an dem Gestell (8) gelenkig abgestützt ist, dadurch gekennzeichnet, dass die Kettenführung ein mit Taschen für die Kette versehenes Kettenrad (6) ist, das gelenkig an dem Gestell abgestützt ist, dass die obere Greifvorrichtung (1, 2) getrennt um die Rotationsachse des Kettenrads (6) drehbar ist und dass zumindest eine Sperrklinke (2) der oberen Greifvorrichtung derart angeordnet ist, dass sie die Kette (11, 12) in dem Kettenrad (6) einrastet. Vorrichtung nach Anspruch 1,

dadurch gekennzeichnet, dass die Sperrklinke (2) der oberen Greifvorrichtung ein senkrechtes Kettenglieds (11) abstützt, das an einem horizontalen Kettenglied (12) abgestützt ist, das wiederum an dem Kettenrad (6) abgestützt ist.
Vorrichtung nach Anspruch 1,

dadurch gekennzeichnet, dass die Sperrklinke (2) der oberen Greifvorrichtung ein senkrechtes Kettenglied (11) abstützt, das auch an dem Kettenrad (6) abgestützt ist.
Vorrichtung nach einem oder mehreren der vorangehenden Ansprüche,

dadurch gekennzeichnet, dass die Hebevorrichtung ein hydraulischer Zylinder (5) ist, der vorspringende Gelenkzapfen (4), die gegebenenfalls an dem Gestell (8) abgestützt sind, und eine Kolbenstange mit einem gegebenenfalls an dem Träger (1) abgestützten Kopf aufweist.
Vorrichtung nach einem oder mehreren der vorangehenden Ansprüche,

dadurch gekennzeichnet, dass die gelenkige Abstützung des Kopfes an der Kolbenstange und die gelenkige Abstützung (3) der Sperrklinke (2) der oberen Greifvorrichtung eine gemeinsame Rotationsachse haben.
Vorrichtung nach einem oder mehreren der vorangehenden Ansprüche,

dadurch gekennzeichnet, dass die Sperrklinken (2, 10) mittels eines zusätzlichen Zylinders (9) mit der Kette (11, 12) außer und in Eingriff schwenkbar sind.
Vorrichtung nach einem oder mehreren der vorangehenden Ansprüche,

dadurch gekennzeichnet, dass der Träger (1), die Sperrklinke (2) der oberen Greifvorrichtung, die gelenkige Abstützung (4) des Schiebezylinders (5) und das Kettenrad (6) mit ihrer gelenkigen Abstützung (7) von dem Gestell (8) demontierbar sind, um als eine Einheit in entsprechende Gestelle (8) mit einem unteren Kettenstopper (10) installiert zu werden.
Vorrichtung nach einem oder mehreren der vorangehenden Ansprüche,

dadurch gekennzeichnet, dass der untere Kettenstopper zwei Sperrklinken (10) aufweist, die symmetrisch auf beiden Seiten der Kettenbahn gelenkig angeordnet sind, wobei die Sperrklinken (10) derart angeordnet sind, dass sie einen Eingriff mit einem horizontalen Kettenglied (12) bilden.
Anspruch[en]
A device for heaving in and paying out a chain (11, 12), comprising a frame (8) provided with a lower locking device for the chain having one or more pawls (10) adapted for engaging the chain (11, 12), a lifting device (5) for the chain (11, 12), a chain guide supported in the frame, an upper gripping device comprising at least one pawl (2) which engages the chain (11, 12) in the chain guide and is supported in a bracket (1) which is pivotally supported with the same axis as the chain guide, and wherein the lifting device (5) is pivotally supported in the bracket (1) and the frame (8),

characterised in that the chain guide is a chain wheel (6) having pockets for the chain and being rotatably supported in the frame, that the upper gripping device (1, 2) is independently pivotable about the axis of rotation of the chain wheel (6), and that said at least one pawl (2) of the upper gripping device is adapted to be able to lock the chain (11, 12) to the chain wheel (6).
A device according to claim 1,

characterised in that the pawl (2) of the upper gripping device is arranged to support a vertical chain link (11) which is supported by a horizontal chain link (12), which in turn is supported by the chain wheel (6).
A device according to claim 1, characterised in that the pawl (2) of the upper gripping device is arranged to support a vertical chain link (11) which is also supported by the chain wheel (6). A device according to one or more of the preceding claims,

characterised in that the lifting device is a hydraulic cylinder (5) having extending pivot pins (4) that may be supported in the frame (8) and having a piston rod with a head that may be supported in the bracket (1).
A device according to one or more of the preceding claims,

characterised in that the pivotal support of the head on the piston rod and the pivotal support (3) of the pawl (2) of the upper gripping device have a common axis of rotation.
A device according to one or more of the preceding claims,

characterised in that the pawls (2, 10) are pivotal out of and into engagement with the chain (11, 12) by means of auxiliary cylinders (9).
The device according to one or more of the preceding claims,

characterised in that the bracket (1), the pawl (2) of the upper gripping device, the pivotal support (4) of the pushing cylinder (5) and the chain wheel (6) with its pivotal support (7) are removable from the frame (8) as a unit for installation on corresponding frames (8) having a lower chain stopper (10).
A device according to one or more of the preceding claims,

characterised in that the lower chain stopper comprises two pawls (10) which are pivotally arranged symmetrically on either side of the chain path, said pawls (10) being arranged to form an engagement with a horizontal chain link (12).
Anspruch[fr]
Dispositif destiné à soulever et à dérouler une chaîne (11, 12), comprenant un cadre (8) muni d'un dispositif de blocage inférieur pour la chaîne comportant un ou plusieurs cliquets (10) adaptés pour se mettre en prise avec la chaîne (11, 12), un dispositif de levage (5) pour la chaîne (11, 12), un guide de chaîne supporté dans le cadre, un dispositif de préhension supérieur comprenant au moins un cliquet (2) qui se met en prise avec la chaîne (11, 12) dans le guide de chaîne et est supporté dans un support (1) qui est supporté de manière pivotante avec le même axe que le guide de chaîne, et dans lequel le dispositif de levage (5) est supporté de manière pivotante dans le support (1) et le cadre (8), caractérisé en ce que le guide de chaîne est une roue à chaîne (6) comportant des poches pour la chaîne et étant supportée de manière rotative dans le cadre, en ce que le dispositif de préhension supérieur (1, 2) peut pivoter de manière indépendante autour de l'axe de rotation de la roue à chaîne (6), et en ce que ledit au moins un cliquet (2) du dispositif de préhension supérieur est adapté pour être en mesure de bloquer la chaîne (11, 12) sur la roue à chaîne (6). Dispositif selon la revendication 1, caractérisé en ce que le cliquet (2) du dispositif de préhension supérieur est agencé pour supporter un maillon de chaîne vertical (11) qui est supporté par un maillon de chaîne horizontal (12), qui est à son tour supporté par la roue à chaîne (6). Dispositif selon la revendication 1, caractérisé en ce que le cliquet (2) du dispositif de préhension supérieur est agencé pour supporter un maillon de chaîne vertical (11) qui est également supporté par la roue à chaîne (6). Dispositif selon une ou plusieurs des revendications précédentes,

caractérisé en ce que le dispositif de levage est un vérin hydraulique (5) comportant des pivots en extension (4) qui peuvent être supportés dans le cadre (8) et comportant une tige de piston avec une tête qui peut être supportée dans le support (1).
Dispositif selon une ou plusieurs des revendications précédentes,

caractérisé en ce que le support pivotant de la tête sur la tige de piston et le support pivotant (3) du cliquet (2) du dispositif de préhension supérieur comportent un axe de rotation commun.
Dispositif selon une ou plusieurs des revendications précédentes,

caractérisé en ce que les cliquets (2, 10) peuvent pivoter hors de prise et en prise avec la chaîne (11, 12) au moyen de vérins auxiliaires (9).
Dispositif selon une ou plusieurs des revendications précédentes,

caractérisé en ce que le support (1), le cliquet (2) du dispositif de préhension supérieur, le support pivotant (4) du vérin de poussée (5) et la roue à chaîne (6) avec son support pivotant (7) peuvent être retirés du cadre (8) d'un seul tenant pour être installés sur des cadres correspondants (8) comportant une butée de chaîne inférieure (10).
Dispositif selon un ou plusieurs des revendications précédentes,

caractérisé en ce que la butée de chaîne inférieure comprend deux cliquets (10) qui sont agencés de manière pivotante et symétrique de chaque côté du chemin de la chaîne, lesdits cliquets (10) étant agencés pour former une liaison en prise avec un maillon de chaîne horizontal (12).






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