EP0699620A1 - Mécanisme de treuil - Google Patents

Mécanisme de treuil Download PDF

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Publication number
EP0699620A1
EP0699620A1 EP95305940A EP95305940A EP0699620A1 EP 0699620 A1 EP0699620 A1 EP 0699620A1 EP 95305940 A EP95305940 A EP 95305940A EP 95305940 A EP95305940 A EP 95305940A EP 0699620 A1 EP0699620 A1 EP 0699620A1
Authority
EP
European Patent Office
Prior art keywords
roll
rolls
winch mechanism
webbing
rope
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.)
Withdrawn
Application number
EP95305940A
Other languages
German (de)
English (en)
Inventor
Peter William Leacroft Saywell
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TREWHELLA BROS UK Ltd
Original Assignee
TREWHELLA BROS UK Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by TREWHELLA BROS UK Ltd filed Critical TREWHELLA BROS UK Ltd
Publication of EP0699620A1 publication Critical patent/EP0699620A1/fr
Withdrawn legal-status Critical Current

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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
    • B66D1/60—Rope, cable, or chain winding mechanisms; Capstans adapted for special purposes
    • B66D1/74—Capstans
    • B66D1/7415—Friction drives, e.g. pulleys, having a cable winding angle of less than 360 degrees

Definitions

  • the present invention is concerned with a winch mechanism for gripping and moving a webbing material or a cable, rope or like material.
  • webbing material in winches in place of the conventional cable or rope.
  • Webbing material has the advantages that it is extremely strong and lightweight, but with webbing it is essential that each turn is wound on top of the preceding turn.
  • the effective diameter of the winch increases with each turn and the mechanical advantage rapidly decreases. Nevertheless, given the advantages of webbing material there is a demand for a winch which can be used with webbing material but which does not suffer the problem of a rapidly decreasing mechanical advantage.
  • a winch mechanism comprising first, second and third rolls for receiving therearound a webbing, cable, rope or the like, the first and second rolls being rotatable about the axes thereof and the third roll being rotatable about the axis thereof and being moveable towards and away from a line joining the axes of the first and second rolls at a point along the line intermediate the first and second rolls, the arrangement of the webbing, cable, rope or the like being such that it:
  • the first, second and third rolls may be mounted between a pair of side plates.
  • the third roll may be slidably mounted in the side plates, for example by means of slots or recesses formed therein.
  • the third roll may be moveable in a direction substantially perpendicular to the line joining the axes of the first and second rolls.
  • the third roll may be moveable along a line which intersects the line joining the axes of the first and second rolls at a point substantially midway between the axes of the first and second rolls.
  • the webbing, cable, rope or the like may comprise a webbing material.
  • One or more of the first, second and third rolls may be provided with a relatively high friction material around the periphery thereof.
  • the first, second and third rolls may be dimensioned such that the distance between the first and second rolls is less than the diameter of the third roll.
  • One of the first and second rolls may be provided with drive means.
  • the drive means may be powered, for example mechanically, hydraulically or electrically, or may be operable manually.
  • the driven roll and the third roll may be interconnected by means of gears such that rotation of the driven roll causes corresponding counter-rotation of the third roll.
  • the webbing, cable, rope or the like wound in by the winch mechanism may be stored in storage means, such as on a rotatable drum.
  • the winch mechanism may include a braking mechanism to allow controlled unwinding of the webbing, cable, rope or the like.
  • the drumless winch mechanism shown in the figures comprises a pair of side plates 1, only one of which is shown in Figure 1 for clarity, having mounted rotatably therebetween three rolls 3, 5 and 7.
  • the rolls 3, 5 and 7 may be made of any suitable material. Where the pulling capacity of the winch mechanism is low, the rolls may be made of plastics material, but for higher pulling capacities the rolls may be made of aluminium or steel. To increase the frictional properties of the peripheries of the rolls, the rolls may be provided therearound with a material 8 having relatively high frictional properties, such as a polyurethane material.
  • the side plates 1 in the illustrated embodiment are generally rectangular, although any convenient shape may be employed, and the side plates may be made of any suitable material, such as aluminium pressure die castings.
  • the rolls 3, 5 and 7 are mounted in a rotatable manner in the side plates 1.
  • the axes of the rolls 3 and 5 are stationary, while roll 7 is mounted in such a way that it is moveable towards and away from a line joining the axes of rolls 3 and 5.
  • the roll 7 is mounted in slots 9 formed in the side plates 1
  • the roll 7 is mounted in recesses 10 formed in the side plates, the slots 9 or recesses 10 extending in a direction substantially perpendicular to the line joining the axes of rolls 3 and 5 and being positioned substantially mid-way between the axes of rolls 3 and 5.
  • the same effect can be achieved by a loose-fit of the roll 7 in the side plates 1.
  • the slots 9 are positioned to one side of the line joining the axes of rolls 3 and 5 such that the axis of roll 7 is positioned to one side of the line joining the axes of rolls 3 and 5.
  • the precise disposition of the slots 9 relative to the line joining the axes of rolls 3 and 5 may be varied to some extent without affecting the operation of the winch mechanism in any significant detrimental manner.
  • the slots 9 may be replaced by any suitable configuration, such as elongate recesses, which permit movement of the roll 7 towards and away from the line joining the axes of rolls 3 and 5.
  • the webbing material may be, for example, of polyester or other natural or man-made material.
  • the webbing material enters the winch mechanism and contacts part of the periphery of roll 3 on that side of the line joining the axes of rolls 3 and 5 remote from roll 7.
  • the webbing material 11 then passes between the rolls 3 and 7 and around that part of the periphery of the roll 7 remote from the line joining the axes of rolls 3 and 5. Thereafter, the webbing material passes between the rolls 7 and 5 and around that part of the periphery of roll 5 on that side of the line joining the axes of the rolls 3 and 5 before passing out of the winch mechanism.
  • the rolls 3, 5 and 7 are dimensioned, in conjunction with the thickness of the webbing material 11, such that the minimum distance between the peripheries of the rolls 3 and 5 is less than the diameter of the roll 7 with the webbing material extending therearound. Thus the roll 7 with the webbing material extending therearound is unable to pass between the rolls 3 and 5. It may be desirable, for safety reasons, for the minimum distance between the peripheries of the rolls 3 and 5 to be less than the diameter of the roll 7. Although the rolls 3, 5 and 7 are shown as all having substantially the same diameter, this is not essential and the rolls 3, 5 and 7 may each have any suitable diameter. Ideally the width of the rolls 3, 5 and 7 is substantially the same as the width of the webbing material 11.
  • webbing material may be replaced by a conventional cable or rope material.
  • the lower end of the webbing material 11 as illustrated in Figure 1 is connected to a load (not shown), but it should be noted that the winch mechanism need not be oriented as shown in the figure.
  • the upper roll 5 as illustrated in Figure 1 is connected as shown in Figures 2 and 3 to drive means 13 or 15.
  • the drive means 15 shown in Figure 3 comprises mechanically, electrically or other powered drive means, while the drive means 13 shown in Figure 2 comprises a handle or the like for manual operation.
  • the driven roll 5 and the moveable roll 7 may be interconnected as shown diagrammatically in Figure 2 by gears 17, 19 secured to both the driven roll 5 and the moveable roll 7.
  • the gears may be, for example, deep tooth spur gears which remain engaged irrespective of the position of the moveable roll 7 relative to the slots 9.
  • the gears 17, 19 may be made of any suitable material depending on the pulling capacity of the winch mechanism. When the capacity of the winch mechanism is low, plastics gears may be used, but as the pulling capacity rises the gears may be made of aluminium or steel.
  • the upper end of the webbing material 11 may pass to a suitable form of storage such as the drum arrangement 21 shown diagrammatically in Figure 3 for the webbing material. It will be appreciated, however, that because the drum is not operating as a winch mechanism the issue of mechanical advantage does not arise.
  • the winch mechanism also incorporates a braking mechanism 23, also shown diagrammatically in Figure 3, which may be of any convenient known form.
  • the braking mechanism allows the winch mechanism to be self-sustaining.
  • the use of an automatic self-sustaining brake mechanism ensures safe operation when lifting and accurate control when lowering.
  • a length of webbing material 11 is passed around the rolls 3, 7 and 5 as previously described. That end of the webbing material 11 extending from the roll 3 is connected to a load (not shown) while the other end of the webbing material may pass, for example, to a storage drum as shown in Figure 3.
  • the effect of the load, in combination with the braking mechanism 23 is to allow controlled unwinding of the winch mechanism and to urge the roll 7 in a direction towards the line joining the axes of the rolls 3 and 5. Therefore the greater the load the greater the force with which the roll 7 is urged against the webbing, cable, rope or the like positioned between the roll 7 and the rolls 3 and 5 and, consequently, the greater the frictional forces between the rolls 3, 5 and 7 and the webbing material 11.
  • the winch mechanism provides a lightweight lifting or pulling device for example for tightening overhead electric cables, telegraph wires, fencing or the like.
  • the mechanism is sufficiently light for such applications to be operated with one hand by a person working on a pylon or up a pole.
  • the winch mechanism may be used in DIY applications, such as changing a car engine or moving a boat or caravan.
  • the load capacity of the winch mechanism may be, for example, in the range from 0.25 tonne to 5 tonnes or more.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Storing, Repeated Paying-Out, And Re-Storing Of Elongated Articles (AREA)
EP95305940A 1994-09-01 1995-08-24 Mécanisme de treuil Withdrawn EP0699620A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9417533A GB2292723A (en) 1994-09-01 1994-09-01 Multi-roll capstan
GB9417533 1994-09-01

Publications (1)

Publication Number Publication Date
EP0699620A1 true EP0699620A1 (fr) 1996-03-06

Family

ID=10760630

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95305940A Withdrawn EP0699620A1 (fr) 1994-09-01 1995-08-24 Mécanisme de treuil

Country Status (2)

Country Link
EP (1) EP0699620A1 (fr)
GB (1) GB2292723A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014147291A1 (fr) * 2013-03-20 2014-09-25 Kone Corporation Arrangement d'installation pour un ascenseur
WO2015085361A1 (fr) * 2013-12-09 2015-06-18 Winnebago Motorhomes Pty Ltd Mécanisme d'entraînement

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE872987C (de) * 1951-04-08 1953-04-09 Yale & Towne Mfg Co Hebezeug mit Seil als Lastorgan
FR2217259A1 (fr) * 1973-02-15 1974-09-06 Kaufer Carl
FR2307761A1 (fr) * 1975-04-18 1976-11-12 Dressler Bruno Palan auto-elevateur
FR2434111A1 (fr) * 1978-08-22 1980-03-21 Tractel Sa Systeme de poulies ameliorant la cooperation d'un treuil avec le cable qu'il actionne
EP0110250A2 (fr) * 1982-11-26 1984-06-13 Heinz Hänel Mécanisme d'entraînement d'un câble de halage
GB2171973A (en) * 1985-03-05 1986-09-10 Fitzgerald Smith Lt Col James In-line Capstan Winch
EP0343063A1 (fr) * 1988-05-18 1989-11-23 Tractel S.A. Treuil pour le défilement d'une sangle

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB874912A (fr) *
US4557465A (en) * 1984-03-19 1985-12-10 The Boeing Company Cable drive mechanism

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE872987C (de) * 1951-04-08 1953-04-09 Yale & Towne Mfg Co Hebezeug mit Seil als Lastorgan
FR2217259A1 (fr) * 1973-02-15 1974-09-06 Kaufer Carl
FR2307761A1 (fr) * 1975-04-18 1976-11-12 Dressler Bruno Palan auto-elevateur
FR2434111A1 (fr) * 1978-08-22 1980-03-21 Tractel Sa Systeme de poulies ameliorant la cooperation d'un treuil avec le cable qu'il actionne
EP0110250A2 (fr) * 1982-11-26 1984-06-13 Heinz Hänel Mécanisme d'entraînement d'un câble de halage
GB2171973A (en) * 1985-03-05 1986-09-10 Fitzgerald Smith Lt Col James In-line Capstan Winch
EP0343063A1 (fr) * 1988-05-18 1989-11-23 Tractel S.A. Treuil pour le défilement d'une sangle

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014147291A1 (fr) * 2013-03-20 2014-09-25 Kone Corporation Arrangement d'installation pour un ascenseur
US10246304B2 (en) 2013-03-20 2019-04-02 Kone Corporation Installation arrangement for an elevator
WO2015085361A1 (fr) * 2013-12-09 2015-06-18 Winnebago Motorhomes Pty Ltd Mécanisme d'entraînement

Also Published As

Publication number Publication date
GB9417533D0 (en) 1994-10-19
GB2292723A (en) 1996-03-06

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