US2961216A - Lifting, lowering and hauling and especially in mine hoisting - Google Patents

Lifting, lowering and hauling and especially in mine hoisting Download PDF

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Publication number
US2961216A
US2961216A US590731A US59073156A US2961216A US 2961216 A US2961216 A US 2961216A US 590731 A US590731 A US 590731A US 59073156 A US59073156 A US 59073156A US 2961216 A US2961216 A US 2961216A
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United States
Prior art keywords
rope
winch
wheel
motor
loop
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Expired - Lifetime
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US590731A
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English (en)
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Blair Robert
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Individual
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B17/00—Hoistway equipment
    • B66B17/02—Hoistway equipment mounted in head-frames
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B15/00—Main component parts of mining-hoist winding devices
    • B66B15/08—Driving gear
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B7/00—Other common features of elevators
    • B66B7/06—Arrangements of ropes or cables

Definitions

  • This invention relates to installations in which long lengths of a flexible element such as a rope or cable (referred to herein as a rope) are payed out or wound in at slow speed during the operation of the installation.
  • a flexible element such as a rope or cable (referred to herein as a rope)
  • the primary application of the invention is to mine hoisting and especially to the lowering and raising of stages during shaft-sinking; but the invention is not restricted to such uses.
  • the primary object of the present invention is to provide equipment which avoids or minimizes the difiiculties of known procedure.
  • the equipment consists in a driven wheel around which the rope passes in driving engagement with the wheel, a winch drum on which the rope is wound, a motor to drive the winch at a speed that ensures a rate of pay'in and pay-out at all times exceeding that of the wheel when the winch is in motion, means to form a loop in the rope between the wheel and the winch, and means to maintain the length of the loop between predctermined limits while keeping the tension in the rope of the loop substantially constant.
  • the loop-forming means consists in a jockey pulley suspended freely from the rope, and the means to maintain the loop within its prescribed limits of length are control switches located to be actuated by the pulley (or by structure associated therewith), when the loop attains the limits of its prescribed range of lengths, the switches controlling the motor that drives the winch.
  • the wheel acts to divide the rope into a zone of high-tension (between it and the load) and a zone of low-tension (between it and the winch).
  • the tensional differential between the zones depends upon the nature of the wheel, the co-efiicient of friction between the rope and the wheel and the angle of contact between the rope and the wheel, and can be selected if not theoretically then empirically so to limit the tension in the low zone that the multi-layer wrapping of the rope around the winch drum is not disadvantageous.
  • the winch since the winch is in the low-tension zone it need not have the robustness of a winch handling highly tensioned rope, its function being merely to pay-out rope as it is demanded by the wheel and wind it in as the wheel surrenders it.
  • tension in the low zone can be so selected that the rope can be wound on to the winch drum under the selected tension at the rope factory, thereby avoiding troublesome and costly rewinding at the place of use.
  • the invention is equally applicable to a plurality of ropes which are to be synchronously operated, such as occurs in shaft-sinking when stages have to be supported.
  • the invention has at least one advantage in these installations which is not present in single-rope installations.
  • the wheel is made to receive all the ropes, or several wheels may be gauged, in which case all, or all but one of the wheels, may be provided with clutches; or each wheel may have its own winch and motor.
  • Figure 2 is a vertical section through the centre of Figure 1;
  • Figure 3 is a fragmentary view of a safety braking system, in elevation.
  • Fig. 4 is a schematic diagram of the electrical circuit.
  • the equipment is shown as handling two ropes 10, 11, but it will be apparent that it could equally well be constructed to deal with fewer or more than two ropes, depending on the nature of the duty which the hoist is to perform.
  • Each rope 10 or 11 is fed from a winch drum 12 or 13, round a direction-changing pulley 14 or 15, down into the cavity 16 of a compensating tower 17, round a jockey pulley 18 or 19, upwardly towards and over a second direction-changing pulley 20 or 21, round a driving wheel 22 or 23 and so away to the point of application of the load.
  • the operations of paying-out and winding-in the ropes are performed by the driving wheels 22, 23.
  • the wheels are driven through suitable drive-transmitting mechanism such as a pinion 24 which meshes with a gearwheel 25 keyed to the shaft 26 of one wheel, and rotated by a motor 26a, the drive to the second wheel being transmitted from the first wheel through a clutch (not shown).
  • the ropes are lapped several times around the wheels.
  • the ropes are constrained to form loops 27 and 28 by the weight of the jockeys 18 and 19 and the structure associated therewith, which weight may be adjustably varied.
  • These jockeys are guided for vertical movement within the cavity of the tower by pairs of vertical rails 29, 3t) and 31, 32 which areengaged by rollers 33, 34 mounted on the sheaves 35, 36 of the jockeys.
  • the lengths of the loops 27 and 28 vary as the jockeys 18 and 19 move upwardly or downwardly in the tower 17.
  • the driving wheels 22, 23 divide the ropes into two zones, one, which is that between the wheels and the load being a zone of high tension, the magnitude of which is governed by the load, and the other of which lies between the Wheels 22, 23 and the winch drums 12, 13
  • the rope tension in the low-tension zone is governed by the weights of the jockeys 13, 19 and remains substantially constant as long as the jockeys are freely suspended from the loops 27, 28, irrespective of the magnitude, or variations in the magnitude, of the rope tension in the high-tension zone.
  • the winch drums 12, 13 may be driven by a single motor 51 housed in a suitable covering 50 with perhaps a clutch on one or either drum to'correct loss of synchronism, but if, as is assumed not to be the case-in the equipment being described, the rates'may vary, then each drum is driven by its own motor.
  • the drive to the drums 12, 13 or each of them is so designed that the drum is rotated at a rate that ensures that the wind-in or pay-out of the drum will at all times exceed that of the driving wheels 22, 23.
  • the means consist in two control switches 39, 40 located to be actuated by contact with the chassis 37 or38 on which the jockey pulley 18 or 19 is mounted, whenever the pulley reaches its upper and its lower limits, the switches being comprised in the circuit of the drum motor or operating a clutch between the motor and the Winch drum.
  • the embodiment may also comprise certain safety devices which come into operation in case of need. These may include limit switches 41, 42 beyond the control switches 39, 40, which, should the jockey pulley 18 or 19 fail to actuate the control switches 39, 40 or the latter not function, immobilize the entire system. There may also be included a braking device on, associated with, or actuated by, the jockey pulley 1 8 or 19. This device may consist (Fig. 3) in a pair of brake shoes 43, 44 irirespect of each jockey 18 or 19.
  • Each pair of brake shoes 43, 44 is carried on bell cranks 45, 46, pivotally mounted on a horizontal member 47 of the framework of the tower 17 At rest, the shoes are close to but free from the periphcr es of the pulleys 15, 21, which may be thickened to provide braking surfaces.
  • the spacing of the shoes from the pulleys is adjustable by screws 48, 49 that make contact with the bell cranks 45, 46.
  • the jockey 19 In use, when the jockey 19 moves above its permitted range, it makes contact with the shoes 43; 44 and jams them between itself and the pulleys 15, 21. The train of pulleys is thus immobilized, with the ropes kinked around them soto resist further paying out of the ropes that the ropes slip on the driving wheels 22, 23.
  • the brake device has also a valuable function in a multiple rope installation where one of the ropes breaks. In these circumstances the jockey pulley associated with the broken rope actuates the lower limit switch 41 to bring the system to a stop.
  • M1 and M2 represent respectively the motors that drive the winch 12 or 13 and the driven wheel 22, 23.
  • M1 is fed from a mains supply 50 through a reversing contactor 52.
  • M2 is fed from the mains supply 50 through a circuit breaker 54.
  • the upper and lower control switches 39, 40 operate to start and stop the motor M1 through the reversing contactor 52.
  • the jockey 18 travels upwardly until it comes into contact with the top control switch 39 and closes it to operate the motor circuit 59, 52.
  • This circuit is operated by the control circuit 58, 39, 40, directional switch 56, 41, which is closed by the closing of the control switch 39.
  • Motor M1 is set in motion and pays out rope, allowing the jockey 18 to move downwards.
  • the jockey then moves upwardly, to close switch 39, to restart the motor, and so on.
  • the limit switches 42, 41 situated respectively at the top and bottom of the tower 17 are operated by the jockey to open the control circuit and thereby to open the motor circuit to prevent overor underwind.
  • Lifting, lowering or hauling equipment comprising a rope, a driven wheel around which the rope passes in driving engagement with the wheel, a motor to drive said wheel, a winch drum on which the rope is wound, a load to which the end of said rope remote from said winch is attached, a motor to drive the winch at a speed that ensures a rate of pay-in and pay-out at all times exceeding that of the wheel when the winch is in motion, a tower located between the wheel and the winch, pulleys arranged to lead the rope into and out of the tower, a jockey pulley freely suspended from the rope within the tower to form a loop of rope between the pulleys, which loop is contained within the tower, switches located to be actuated by structure associated with the jockey pulley, when the loop attains the limits of its prescribed range of lengths, said switches controlling the motor that drives the winch; limit switches beyond said switches arranged to be operated by structure associated with the jockey pulley to stop said driven wheel and winch motors when the loop
  • Lifting, lowering or hauling equipment comprising a rope, a driven wheel around which the rope passes in driving engagement with the wheel, a motor to drive said wheel, a winch drum on which the rope is wound, a load to which the end of said rope remote from said winch is attached, a motor to drive the winch at a speed that ensures a rate of pay-in and pay-out at all times exceeding that of the wheel when the winch is in motion, pulleys including a jockey pulley to form a loop in the rope between the wheel and the winch, and means to maintain the length of the loop between predetermined limits while keeping the tension in the rope of the loop substantially constant; and including also braking means to lock the equipment if the length of the loop moves out of the prescribed range.
  • the braking means comprises shoes that are arranged to be between the jockey pulley and pulleys due to shortening of the loop.
  • Lifting, lowering or hauling equipment comprising a rope, a driven wheel around which the rope passes in driving engagement with the wheel, a motor to drive said Wheel, a winch drum on which the rope is wound, a load to which the end of said rope remote from said winch is attached, a motor to drive the winch at a speed that ensures a rate of pay-in and pay-out at all times exceeding that of the wheel when the winch is in motion, a tower located between the wheel and the winch, pulleys arranged to lead the rope into and out of the tower, a jockey pulley freely suspended from the rope within the tower to form a loop of rope between the pulleys, which loop is contained within the tower, control switches located to be actuated by structure associated with the jockey pulley, when the loop attains the limits of its prescribed range of lengths, the switches controlling the motor that drives the winch; limit switches beyond the control switches arranged to be operated by structure associated with the jockey pulley to stop said driven wheel and winch motors when

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US590731A 1955-06-12 1956-06-11 Lifting, lowering and hauling and especially in mine hoisting Expired - Lifetime US2961216A (en)

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ZA2961216X 1955-06-12

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US (1) US2961216A (enrdf_load_stackoverflow)
BE (1) BE548579A (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3341148A (en) * 1966-03-22 1967-09-12 Gayley Wycombe Corp Take-up apparatus
US3469820A (en) * 1967-07-05 1969-09-30 Ocean Science & Eng Drill pipe stabilizing apparatus
US4111398A (en) * 1975-04-18 1978-09-05 Wharton Engineers (Elstree) Limited Haulage winches
US4354608A (en) * 1979-06-08 1982-10-19 Continental Emsco Company Motion compensator and control system for crane
US4411392A (en) * 1980-04-03 1983-10-25 Liba Maschinenfabrik Gmbh Speed-compensating device for the feeding of threads to a weaving or knitting machine
US4614331A (en) * 1984-12-04 1986-09-30 Francois Simon Lifting pulley block
US20160145077A1 (en) * 2014-11-25 2016-05-26 Kone Corporation Arrangement and method
US11186465B2 (en) * 2015-12-22 2021-11-30 Inventio Ag Elevator system having a reservoir for traction medium

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1475855A (en) * 1921-05-24 1923-11-27 Westinghouse Electric & Mfg Co Tension device for armature banding
US1832430A (en) * 1929-03-06 1931-11-17 Western Electric Co Winding device
US2203946A (en) * 1939-07-06 1940-06-11 D E Makepeace Company Heat-treating wire
US2603428A (en) * 1946-06-20 1952-07-15 Westinghouse Electric Corp Wire feed machine
US2741437A (en) * 1953-02-10 1956-04-10 Belden Mfg Co Constant tension take-up and let-off mechanism
US2825512A (en) * 1953-10-19 1958-03-04 Artos Engineering Co Wire feeder

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1475855A (en) * 1921-05-24 1923-11-27 Westinghouse Electric & Mfg Co Tension device for armature banding
US1832430A (en) * 1929-03-06 1931-11-17 Western Electric Co Winding device
US2203946A (en) * 1939-07-06 1940-06-11 D E Makepeace Company Heat-treating wire
US2603428A (en) * 1946-06-20 1952-07-15 Westinghouse Electric Corp Wire feed machine
US2741437A (en) * 1953-02-10 1956-04-10 Belden Mfg Co Constant tension take-up and let-off mechanism
US2825512A (en) * 1953-10-19 1958-03-04 Artos Engineering Co Wire feeder

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3341148A (en) * 1966-03-22 1967-09-12 Gayley Wycombe Corp Take-up apparatus
US3469820A (en) * 1967-07-05 1969-09-30 Ocean Science & Eng Drill pipe stabilizing apparatus
US4111398A (en) * 1975-04-18 1978-09-05 Wharton Engineers (Elstree) Limited Haulage winches
US4354608A (en) * 1979-06-08 1982-10-19 Continental Emsco Company Motion compensator and control system for crane
US4411392A (en) * 1980-04-03 1983-10-25 Liba Maschinenfabrik Gmbh Speed-compensating device for the feeding of threads to a weaving or knitting machine
US4614331A (en) * 1984-12-04 1986-09-30 Francois Simon Lifting pulley block
US20160145077A1 (en) * 2014-11-25 2016-05-26 Kone Corporation Arrangement and method
US9862574B2 (en) * 2014-11-25 2018-01-09 Kone Corporation Elevator roping arrangement and method for installing roping of an elevator
AU2015258338B2 (en) * 2014-11-25 2020-01-02 Kone Corporation Arrangement and method
US11186465B2 (en) * 2015-12-22 2021-11-30 Inventio Ag Elevator system having a reservoir for traction medium

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