Rope guiding device and a method for guiding a rope

Patent metadata

Field	Value
Publication number	US-2020354202-A1
Application number	US-201816640395-A
Country	US
Kind code	A1
Filing date	Aug 21, 2018
Priority date	Aug 21, 2017
Publication date	Nov 12, 2020
Grant date	—

Abstract

A rope guiding device for guiding a rope on a rope drum, the rope drum being adaptable to rotate about a drum axis to wind the rope around the rope drum or from the rope drum to hoist and lower a load adapted on the rope, includes at least guiding element, and an actuator for generating a rope guiding force, which force affects each guiding element in the direction of the drum axis so that the movement of each guiding element in the direction of the drum axis may be guided by the force.

First claim

1 .- 24 . (canceled)

25 . A rope guiding device for guiding a rope on a rope drum, the rope drum being adaptable to rotate about a drum axis to wind the rope around the rope drum or from the rope drum to hoist and lower a load adapted on the rope, the rope guiding device comprising:
at least one guiding element; an actuator for generating a rope guiding force in the direction of the drum axis; and one or more movement member(s) adapted to convey the force generated by the actuator to one or more guiding element(s) in the direction of the drum axis so that the movement of each guiding element in the direction of the drum axis may be guided by means of the force, whereby the rope guiding device is arranged to compensate a rope angle which is caused by the angle between a rope run-off point from the rope drum and a subsequent guiding structure closest to the rope drum and guiding the direction of the rope, by the force parallel to the drum axis of the rope drum.

26 . The rope guiding device as claimed in claim 25 , wherein said actuator is adapted to guide each guiding element to such a position that the fleet angle of the rope from the rope drum is less than 4 degrees in relation to direction of a radius of the rope drum, regardless of the angle between rope run-off point from the rope drum and the subsequent guiding structure closest to the rope drum and guiding the direction of the rope.

27 . The rope guiding device as claimed in claim 26 , wherein said rope fleet angle from the rope drum is substantially in the direction of the radius of the rope drum.

28 . The rope guiding device as claimed in claim 25 , wherein the rope guiding device comprises at least two guiding elements and said guiding elements are adapted to move mutually at the same pace in at least the direction of the rope drum.

29 . The rope guiding device as claimed in claim 25 , comprising:
at least one movement member extending in the direction of the drum axis, to which at least one guiding element is immovably adapted, whereby the actuator affects each movement member and each movement member is at any one time adapted to convey the rope guiding force generated by the actuator to said guiding element adapted in said movement member.

30 . The rope guiding device as claimed in claim 25 , comprising:
a first movement member extending in the direction of the drum axis, to which the first of said two guiding element is immovably adapted; and a second movement member extending in the direction of the drum axis, to which the second of said two guiding element is immovably adapted, whereby the first movement member and the second movement member are coupled to each other so that the actuator simultaneously acts on the first movement member and the second movement member, wherein the first movement member is adapted to convey the rope guiding force created by the actuator to the first guiding element, and wherein the second movement member is adapted to convey the rope guiding force created by the actuator to the second guiding element.

31 . The rope guiding device as claimed in claim 30 ,
wherein the first movement member comprises a first toothed bar and the second movement member comprises a second toothed bar which are intercoupled by a geared axle, the toothing of the geared axle being adapted to couple to the toothing on both the first toothed bar and the second toothed bar so that the toothed bars move, as the geared axle is rotated, simultaneously to opposite directions in the direction of the drum axis, and wherein the actuator is adapted to rotate the geared axle.

32 . The rope guiding device as claimed in claim 30 ,
wherein the first movement member comprises a right-handed screw and the second movement member comprises a left-handed screw, and wherein said right-handed screw and left-handed screw are connected to each other at their ends, and the actuator is adapted to rotate the interconnected screws so that the guiding elements adapted in said screws move, as the screws are rotated, simultaneously to opposite directions in the direction of the drum axis.

33 . The rope guiding device as claimed in claim 30 ,
wherein the actuator is adapted to rotate a drive wheel, and wherein the first movement member and second movement member form the belt so that the first guiding element and the second guiding element are adapted on different sides of the drive wheel, whereby the actuator is adapted to rotate the belt by means of the drive wheel so that the first guiding element and the second guiding element move simultaneously in different directions in the direction of the drum axis.

34 . The rope guiding device as claimed in claim 25 , wherein the actuator comprises a gear motor or rope drum.

35 . The rope guiding device as claimed in claim 25 wherein the rope guiding device is adapted to guide the rope also when the rope is being wound on the rope drum in two or more layers.

36 . A hoisting device which comprises the rope guiding device as claimed in claim 25 for guiding a hoisting rope on the rope drum which is the rope drum of the hoisting device.

37 . The hoisting device as claimed in claim 36 and comprising two ropes adapted on the rope drum in one of the following ways:
such that the ropes are wound from the edges of the rope drum towards the centre point of the rope drum, whereby, at the upper position of the hoisting device, the run-off points of the ropes from the rope drum are closest to each other, and correspondingly at the lowest position of the hoisting device, furthest away from each other in the direction of the drum axis,
such that the ropes are wound from the centre point of the rope drum towards the edges of the rope drum whereby at the upper position of the hoisting device the rope run-off points from the rope drum are furthest from each other and correspondingly at the lowest position of the hoisting device closest to each other in the direction of the drum axis, or
such that the ropes are wound in mutually the same direction whereby the rope run-off points from the rope drum are at an equal distance from each other in all the positions of the hoisting device.

38 . A method for guiding a rope on a rope drum by means of a rope guiding device, the rope drum being adaptable to rotate about a drum axis to wind the rope around the rope drum or from the rope drum to hoist and lower a load adapted on the rope, comprising the steps of:
guiding the rope with the rope guiding device which comprises at least one guiding element, one or more movement member(s) and an actuator for generating a rope guiding force in the direction of the drum axis; and moving said at least one guiding element in the direction of the drum axis by means of the rope guiding force produced by the actuator of the rope guiding device and conveyed to each guiding element in the direction of the drum axis by the one or more movement member(s), whereby a rope angle which is caused by the angle between rope run-off point from the rope drum and a subsequent guiding structure closest to the rope drum and guiding the direction of the rope is compensated by the force parallel to the drum axis of the rope drum provided by the rope guiding device.

39 . The method as claimed in claim 38 ,
wherein the rope guiding device comprising at least two guiding elements, and wherein the method comprises moving the guiding elements in the direction of the drum axis by means of the rope guiding force produced by the actuator, the force affecting the guiding elements substantially in the direction of the drum axis.

Assignees

• Konecranes Global Corp

Inventors

• Kaiturinmäki Jari

Classifications

• B66D1/38 Primary

  by means of guides movable relative to drum or barrel · CPC title

• B66D1/485

  electrical · CPC title