EP1505031A1 - Method for operating a lifting apparatus and/or a conveyor and lifting apparatus and/or conveyor - Google Patents

Abstract

The method for operating a lifting and transporting unit (1), in particular, a crane with at least one wire rope (2) windable onto and from a drum (3) involves introduction of a separation element (4) into a space between adjacent rope coils on the drum so that direct contact them is at least partially prevented. An independent claim is also included for a lifting and transporting unit for implementation of the proposed method.

Description

The invention relates to a method for operating a lifting and / or Conveying device, in particular a crane, the at least one rope, in particular a wire rope, which, on or from a donor roll can be wound up or processed. Furthermore, the invention relates to a Lifting and / or conveying device, in particular a crane.

In lifting and / or conveying devices, especially in cranes, is mostly a pull rope provided with which the to be lifted or to be conveyed Load can be moved. To position the load accordingly, is more or less rope wound on a dispenser drum, the electric motor is driven.

Detailed investigations on the issue of life of the used coming ropes in the aforementioned lifting and / or conveying devices have revealed that the life of wound steel cables is considerably less than that of unwound ropes. It applies too suspect that during the winding process, the rope in the already on The donor role located Seilwindungen buried so that it micro-welds the material of the rope comes. The individual cable turns, which are on the dispenser roll, so then have one, if also small, metallic, cohesive connection. When re-rolling of the rope from the donor roll become these micro-welds torn apart again, causing the steel material that makes up the rope to is damaged. As a result, there is a high material stress comes, which significantly reduces the life of the rope.

The invention is therefore based on the object, a method for operating a lifting and / or conveying devices and such a device to propose, with or with which it is possible, the life to extend considerably. In particular, the rope during the winding process be treated on the donor role as well as re-unwinding so that there is no damage to the rope material.

The solution of this problem by the invention is procedurally characterized characterized in that when winding the rope on the dispenser roll a separation medium so between the individual rope turns of the rope on the Dispenser roll is introduced that a contact of the cable coils with each other at least partially, preferably completely, is prevented.

With the separation medium so is a direct contact of the individual cable turns - at least largely - prevented; there is no high surface pressure Metal-metal, allowing a point-welding of the individual Metallic cable turns is excluded. This will be the Life of the rope considerably increased.

The separating medium is preferably in the form of a strip-shaped plane or bent Train formed; It is especially thought of a plastic sheet.

The separation medium can be when feeding between the individual cable turns of the rope from a release media roll associated with the donor roll be handled. It can also be provided that the rotational movement the dispenser roll with the rotary motion of the separating media roll is synchronized. This synchronization of the rotational movements takes place with Advantage with mechanical means.

Finally, it can also be provided that when rewinding of the rope from the donor roll, the separation medium on the release media roll being rewound.

The lifting and / or conveying device according to the invention, in particular the Crane, has at least one rope, in particular a wire rope, and a Dispenser roll on which the rope can be wound or unwound. The inventive Embodiment provides that the dispenser roll a release media role is assigned, from the winding of the rope on the dispenser roll a separation medium so between the individual cable turns of the rope unwound on the dispenser roll is that a contact of the cable turns mutually at least partially, preferably completely prevented becomes.

The separation medium can be in the form of a strip-shaped plane or curved Railway, in particular made of plastic, be formed.

Furthermore, synchronization means, in particular mechanical synchronization means, be provided for synchronizing the rotational movement the release media roll with the donor roll.

A safe and precise arrangement of the separation medium can be achieved be that a guide device is provided, with which the Separation medium of the dispenser roll can be supplied.

The separation medium is advantageously a thermoplastic or thermoset for use. Manufacturing advantages are achieved when it as a continuous strip is extruded.

An alternative embodiment of the invention provides for a lifting and / or Conveying device of the type mentioned, in which it is provided that the Rope is provided with a separation medium, so that when winding up the rope on the donor roll this so between the individual rope turns of the Rope on the donor roll passes that contact the cable turns with each other at least partially, preferably completely, is prevented.

In contrast to the aforementioned embodiment, so here is the rope itself provided with the separation medium, so that the desired effect of spacing the individual cable turns on the dispenser roll alike is ensured.

The separation medium can completely envelop the rope; but it can Also be provided that the separation medium, the rope only over a predetermined Enveloped area wrapped.

With the proposed measures it is achieved that the rope is very gentle is treated when wound up on the donor roll and later is handled by her again. It is reliably excluded that it to selective micro welds comes, which would damage the rope. The life of the rope is thereby considerably extended; This can done up to a factor of 50.

FIG 1

schematisch einen Kran in der Seitenansicht;

FIG 2

den Schnitt A-B gemäß FIG 1 durch die Spenderrolle des Krans und

FIG 3

den linken Endbereich des Krans gemäß FIG 1 in einer alternativen Ausgestaltung.

In the drawings, embodiments of the invention are shown. Show it:

FIG. 1

schematically a crane in side view;

FIG. 2

the section AB of FIG 1 by the donor roll of the crane and

FIG. 3

the left end of the crane according to FIG 1 in an alternative embodiment.

In Figure 1, a crane 1 is shown schematically in the side view. He points in the usual way a vertically arranged support 9, on which a horizontal arranged carrier 10 is attached. A load 11 is on a wire rope 2 attached and is thereby moved vertically up and down that the wire rope 2 up on a donor roll 3 and is unwound. Not shown are electric drive means, the donor roll 3 with predetermined Turning speed and preset angle of rotation.

On the support 10 is next to the dispenser roll 3 another role, namely the release media roll 6, arranged. On this is a separation medium. 4 wound, this being an endless extruded, flat plastic sheet is. As a material for the separation medium is basically Any type of plastic into consideration, being one of the company Elastogran manufactured plastic with the trade name Elastollan especially has proven.

If the load 11 is to be moved vertically upwards, the wire rope 2 must open the dispenser roll 3 are wound up accordingly. It is intended that in this winding process, the strip-shaped separation medium. 4 so between the individual cable winding of the wire rope 2 on the dispenser roll 3 is introduced, that a contact of the individual cable turns with each other is prevented.

To illustrate this, the section A-B according to FIG. 1 can be seen in FIG. It can be seen how individual cable windings 5, 5 ', 5 "of the wire rope 2 on the donor roll 3 are wound up. The wound on the release media roll 6 Plastic sheet (separation medium 4) is when winding the rope 2 on the dispenser roll 3 so under the rope 2 that it is in on the Dispenser roll 3 wound state semicircular from below to the Rope 2 applies. As can be seen from FIG. 2, this results from the fact that the individual cable windings 5, 5 ', 5 "of the rope 2 no direct - metallic - have more contact, since between the individual cable turns, 5, 5 ', 5 "the separating medium 4 comes to rest the individual cable turns with each other are thus reliably prevented; the life of the rope 2 is substantially increased.

As can be seen from FIG. 3, it can be provided that the strip-shaped Separating medium 4 of its separation media roll 6 when Aufwikkeln of the rope 2 is guided on the dispenser roll 3 via a guide device 8 becomes. This is indicated only schematically in FIG. 3 and causes the plastic strip 4 when rolling the rope 2 on the dispenser rolls. 3 exactly "under" the rope 2 is brought, so that it rolls up on the Dispenser roll 3 - as seen in FIG 2 - semicircular around the rope 2 sets.

While rolling up the rope 2 on the dispenser roll 3 of the plastic strip 4 is unwound from the release media roll 6, this is reversed Operation when unrolling the rope 2 of the dispenser roll 3 accordingly. In this case, the plastic strip 4 is thus back on the release media roll 6 wound up.

Important for a good function of the described method is that the Separating medium 4 in the form of the plastic strip exactly at the speed is guided under the rope 2 near the donor roller 3, with this is wound on the dispenser roll 3. For this purpose, as shown in FIG. 1, only very schematically illustrated synchronization means 7 is provided. It these may be mechanical transmission means which ensure that the separation medium 4 exactly with the winding speed of the rope 2 is supplied.

But it is also possible to execute the synchronization means 7 electronically. In this case, the separating media roller 6 may be provided by an electric motor, preferably powered by a servomotor, its Angular or rotational speed signals from a travel or speed measurement sensor receives the location or speed of the Rope 2 when rolling the rope 2 on the dispenser roll 3 measures.

A metallic contact of the individual cable windings 5, 5 ', 5 "of the rope 2 can also be prevented by the rope 2, at least in the wound up Area provided from the outset with a separation medium 4 is. Again, the said plastic is preferably used, wherein in this case, the rope over at least part of its circumference the coating having. In this case, the rope 2, as seen in Figure 2, semicircular Surrounded by the separation medium 4, which with appropriate guidance of the rope is sufficient to a spaced apart in the wound state to ensure the individual cable turns 5, 5 ', 5 ".

Likewise, the rope 2 can also be completely surrounded by a plastic layer 4 so that the desired effect is achieved.

The proposal according to the invention can be used wherever in lifting and / or conveying devices, steel cables are wound up and unwound that is, for all types of cranes, crane trucks, winches, etc.

LIST OF REFERENCE NUMBERS

1

Lifting and / or conveying device (crane)

2

Rope (wire rope)

3

supply roll

4

separation medium

5, 5 ', 5 '

rope wrap

6

Separation media role

7

synchronization means

8th

guiding device

9

carrier

10

carrier

11

load

Claims (13)

Method for operating a lifting and / or conveying device (1), in particular a crane, which has at least one cable (2), in particular a wire rope, which can be wound on or off a donor roller (3) .
characterized in that when winding the rope (2) onto the donor roll (3) a separation medium (4) between the individual cable turns (5, 5 ', 5 ", ...) of the rope (2) on the donor roll (3 ) is introduced, that a contact of the cable turns (5, 5 ', 5 ", ...) with each other at least partially, preferably completely prevented. A method according to claim 1, characterized in that the separation medium (4) is formed as a strip-shaped plane or curved path, in particular as a plastic sheet, preferably formed from a thermoplastic or thermosetting plastic and / or extruded. A method according to claim 1 or claim 2, characterized in that the separating medium (4) when feeding between the individual cable windings (5, 5 ', 5 ", ...) of the rope (2) of one of the dispenser roll (3) associated with separation media Roll (6) is handled. A method according to claim 3, characterized in that the rotational movement of the dispenser roll (3) is synchronized with the rotational movement of the separating media roll (6), in particular by mechanical means. A method according to claim 3 or claim 4, characterized in that when rewinding the rope (2) from the donor roller (3) the separation medium (4) is rewound on the release media roll (6). Lifting and / or conveying device (1), in particular a crane, which has at least one cable (2), in particular a wire rope, and a dispensing roller (3) on which the rope (2) can be wound or unwound,
characterized in that the dispenser roll (3) is associated with a separating media roll (6), from which upon winding of the rope (2) on the dispenser roll (3) a separation medium (4) between the individual cable turns (5, 5 ', 5 ", ...) of the rope (2) on the donor roll (3) can be unwound or unwound, that a contact of the cable turns (5, 5 ', 5", ...) with each other at least partially, preferably completely prevented becomes. Lifting and / or conveying device according to claim 6, characterized in that the separating medium (4) as a strip-shaped plane or curved path, in particular of plastic, is formed. Lifting and / or conveying device according to claim 6 or 7, characterized by synchronization means (7), in particular mechanical synchronization means for synchronizing the rotational movement of the separating media roll (6) with that of the dispensing roll (3). Lifting and / or conveying device according to one of claims 6 to 8, characterized by a guide device (8), with which the separation medium (4) of the dispenser roll (3) can be supplied or is supplied. Lifting and / or conveying device according to one of claims 6 to 9, characterized in that the separating medium (4) made of plastic, in particular of thermoplastic or thermoset, and / or extruded as endless strip. Lifting and / or conveying device (1), in particular a crane, which has at least one cable (2), in particular a wire rope, and a dispensing roller (3) on which the rope (2) can be wound or unwound,
characterized in that the cable (2) is provided with a separation medium (4), so that when winding the rope (2) on the dispenser roll (3) this between the individual cable turns (5, 5 ', 5 ", .. .) Of the rope (2) on the dispenser roll (3) that a contact of the cable turns (5, 5 ', 5 ", ...) with each other at least partially, preferably completely prevented. Lifting and / or conveying device according to claim 11, characterized in that the separating medium (4) completely encloses the cable (2). Lifting and / or conveying device according to claim 12, characterized in that the separating medium (4) surrounds the cable (2) only over a predetermined circumferential area.

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