EP0363800A1 - Appareil de levage - Google Patents

Appareil de levage Download PDF

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Publication number
EP0363800A1
EP0363800A1 EP89118393A EP89118393A EP0363800A1 EP 0363800 A1 EP0363800 A1 EP 0363800A1 EP 89118393 A EP89118393 A EP 89118393A EP 89118393 A EP89118393 A EP 89118393A EP 0363800 A1 EP0363800 A1 EP 0363800A1
Authority
EP
European Patent Office
Prior art keywords
cable
sheave
biasing means
hoist
frame
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.)
Granted
Application number
EP89118393A
Other languages
German (de)
English (en)
Other versions
EP0363800B1 (fr
Inventor
Marvin M. May
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.)
POWER CLIMBER Inc
Original Assignee
POWER CLIMBER Inc
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 POWER CLIMBER Inc filed Critical POWER CLIMBER Inc
Publication of EP0363800A1 publication Critical patent/EP0363800A1/fr
Application granted granted Critical
Publication of EP0363800B1 publication Critical patent/EP0363800B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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

  • This invention pertains to a hoist apparatus for raising or lowering a load along a cable and more particularly to an improved hoist apparatus which is simply constructed, light in weight, relatively inexpensive, easily serviced, allows for breech cable loading, incorporates advantageous safety features, and is highly reliable.
  • Traction hoists move up and down a wire rope (cable) by creating friction between the wire rope and one or more sheaves and drums.
  • Current traction hoists are exemplified by U.S. Pat. Nos. 4,139,178 and 3,944,185. These hoists include a motor, power transmission, cable driving sheave, cable tensioning sheave, a pressure exerting chain, and a number of brake mechanisms. These major components are all mounted to the same framework - a large casting, with the drive sheave radially stationary and the chain moving to bias the cable.
  • an object of the present invention to provide an improved hoist apparatus which is simply constructed, inexpensive, light in weight, easily inspected and serviced, and reliable.
  • a hoist apparatus for moving a load along a cable which includes a frame, a cable biasing means, and a sheave.
  • the cable biasing means is attached to the frame.
  • the sheave is movably connected relative to the frame so that it is free to move relative to the frame within a limited range toward and away from the cable biasing means.
  • the sheave has a circumferential peripheral groove which receives the cable.
  • the cable biasing means biases the cable toward the groove when the sheave is positioned adjacent the cable biasing means.
  • the sheave is movably positioned relative to the cable biasing means as a function of the tension in the cable.
  • the cable biasing means includes two pressure rollers and two rim rollers which divide the load on the cable biasing means between them.
  • the cable biasing means can be rigidly attached to the upper frame so that it will not move vertically, regardless of the pressure between it and the cable.
  • the cable biasing means may also include a shaft movable with the roller assembly against a spring a distance that is proportional to tension in the cable. Positioning of the roller assembly under such circumstances may be used to activate a brake means or provide a measure of load conditions. Positioning of the sheave may be used to activate another brake means.
  • a reeving spring acts on the cable biasing means to allow reeving of the cable around the sheave by the motor.
  • FIGS. 1, 2, and 3 there is illustrated the hoist apparatus of the present invention generally indicated at 10 which is enclosed within a housing 14.
  • Hoist 10 is drivingly related to a cable 12.
  • the cable 12 is normally a flexible, steel, wire rope which will have a diameter based upon the maximum load to be lifted.
  • a separate cable (“slack rope”) 16 is also used as part of the hoist apparatus as a safety device. Cable 16 passes through a safety braking means 18 which serves to automatically brake movement of hoist 10 with respect to cable 16 under certain conditions, eg., an underload condition such as would occur if a load was accidentally lowered on a building obstruction, the severing of cable 12, etc.
  • Cable 12 also is interconnected with a safety brake in the form of an overspeed governor means 20.
  • Means 20 stops descent of the hoist 10 in the event downward velocity of hoist 10 relative to cable 12 exceeds a predetermined maximum.
  • Cable 12, after passing through brake means 20 wraps around a sheave 22 and then is directed out of housing 14 by a diverter block 24.
  • Sheave 22 is part of a lower assembly which is also made up of motor 26, gearbox 28 and lower frame 30 preferably in the form of a casting. Sheave 22, motor 26, and gearbox 28 are mounted to casting 30. Mounted to the motor 26 via clamps 32 is electrical control box 34. A cover 36 is connected to box 34 at flanges 36. Associated with control box 34 is a switch 40 and emergency stop button 42. Switch 40 controls the direction of rotation of motor output which results in an up or down movement of hoist 10. Button 42 cuts power to motor 26 and can also be used to manually (by levers) actuate brake 20.
  • Hoist 10 also includes an upper assembly made up of frame 50, a cable biasing means generally indicated at 52, brake means 20, and brake means 18. Cable biasing means 52 and brake means 20 are connected to side 53 of frame 50 while brake means 18 is connected to side 54 of frame 50.
  • Cable 12 fixedly connected to some stable point on a building, for example, passes down through a bushing 56 within an opening 57 in the upper wall of housing 14. After entering hoist 10, cable 12 passes through overspeed governor means 20.
  • overspeed governor means 20 Such a means is described in U.S. Patents 3,944,185 and 4,139,178 the Specifications of which are incorporated herein by reference.
  • cable 12 would be gripped between a braking cam and a stop, thereby braking movement of cable 12 through hoist 10 when cable speed through the hoist exceeds a predetermined limit. The braking cam is moved into the gripping position when the limit is exceeded.
  • Cable 12 after passing through governor means 20 is received within a circumferential peripheral groove 58 of sheave 22. Cable 12 passes almost completely around groove 58 to a diverter block 24 which guides the cable 12 out of groove 58, whereupon it proceeds out of housing 14. Diverter block 24 is mounted on casting 30 and has itself a grooved channel (not shown) which guides the cable 12 away from alignment with groove 58.
  • a rigid stationary cable guide 60 is positioned concentrically around the lower portion of the periphery of sheave 22. Cable guide 60 can be an integral part of casting 30 or a separate member detachably mounted to casting 30 (which is preferred to enable breech loading). Cable guide 60 directs cable 12 into and around the periphery of sheave 22 when cable 12 is first reeved into hoist 10 and also keeps cable 12 from coming out of groove 58 when cable 12 is not under tension.
  • the cable biasing means 52 comprises a roller assembly which is rigidly connected to frame 50. Shown are two pressure rollers 62 mounted for rotation between two triangular shaped brackets 64 and 65. While one pressure roller could be used, two are preferred in order to divide the applied loads between them (when pressure rollers 62 compress cable 12 against sheave 22 as discussed hereinafter). Pressure rollers 62 are mounted on axles 66 which are fastened to brackets 64 and 65. On each side of pressure rollers 62 are spacers 68. The assembly is fastened to frame 50 by a bolt 70. Spacers 72 and 74 fit respectively around the bolt 70 between brackets 64 and 65 and between bracket 65 and frame 50. Pressure rollers 62 have grooved peripheries adapted for engaging the outwardly directed surface of cable 12 when it is received in the groove 58 of sheave 22.
  • FIGS 5-7 illustrate the movable connection of frame 50 to casting 30.
  • Casting 30 has an integral upwardly extending flange 76 which has a vertically extending slot 78 therein.
  • a shoulder bolt 80 connected to frame 50 fits within slot 78.
  • a washer 82 retains the bolt 80 within slot 78.
  • the lower assembly (casting 30/sheave 22/motor 26/gearbox 28) is vertically movable relative to the upper assembly (frame 50/cable biasing means 52) within a limited range, ie., the length of movement of bolt 80 within slot 78.
  • a plurality of guide members are used. Flanged on casting 30 are two hollow guide blocks 84. Mounted within the bore of each block 84 is a guide pin 86. On frame 50 are mating tubular guide block flanges 88. Flanges 88 each have a central bore 90 in vertical alignment with and sized to accomodate pins 86. Bushings 92 can be fit within bore 90 of each flange 88 for ease of movement of pins 86. As should be understood, pins 86 move up and down within flanges 88 with relative vertical movement of the lower and upper assemblies. This is done without hindering such relative vertical movement while acting to maintain vertical alignment of the upper and lower assemblies.
  • a load such as scaffolding carrying personel and equipment along the face of a building
  • tension in the cable 12 forces the lower assembly and more specifically the sheave 22 vertically toward the upper assembly.
  • the amount of force on the cable 12 will be proportional to the tension in cable 12.
  • Hoist 10 is simply constructed, inexpensive, lightweight, has relatively few moving parts, is easily serviced, and is reliable. It can simply be breech loaded by moving apart or disconnecting the upper and lower assemblies (this also simplifies service, handling, and maintenance).
  • FIGS. 5 and 8 also illustrate an advantageous slack rope brake.
  • Pinned to the upper edge of casting flange 76 is a link 91 which is connected to another link 89.
  • Link 89 is suitably mechanically connected to the slack rope brake 18.
  • Brake means 18 like brake means 20 would also preferably have a cam and stop member between which cable 16 would pass. However, instead of having a cable speed dependent mechanism to actuate the brake means 18 to cause the cam and stop to clamp the cable 16, the cam is simply moved to its clamping position by virtue of movement of link 89 (which could directly position the cam).
  • FIGS. 9a and 9b A second embodiment of the invention is shown in FIGS. 9a and 9b.
  • the cable biasing means 93 also includes rim rollers 94.
  • Rim rollers 94 (which are shown in more detail in FIG. 12) are mounted for rotation between a pair of bell crank brackets 96. Rim rollers 94 are mounted on an axle 98 which is fastened to brackets 96. Between rim rollers 94 are spacers 100 which position rim rollers 94 such that they bear against both outer edges of groove 58 while bridging the groove itself and cable 12. Alternately, one rim roller with a central groove would work equivalently.
  • Bell crank brackets 96 are fastened to brackets 64 and 65 at the end opposite to that which connects the rim rollers 94 by a shaft 97 which passes through brackets 64, 65, and 96.
  • the shaft 97 is clamped (not shown) at both ends outside brackets 96.
  • the only connection of cable biasing means 93 to frame 50 is pivotally at 102.
  • a major advantage of cable biasing means 93 is that it allows for regulating the pressure on the cable 12.
  • FIG. 9a there is minimal cable tension and only the pressure rollers 62 contact the cable 12.
  • the cable 12 is shown protruding from groove 58 under such circumstances.
  • the cable biasing means 93 and sheave 22 are moved toward each other, the cable 12 is compressed between cable biasing means 93 and sheave 22 and biased into groove 58.
  • the force bearing against cable 12 is reduced by the amount of the load taken up by the rim rollers 94 and absorbed by the rim of sheave 22.
  • the allocation of forces between the pressure rollers 62 and rim rollers 94 can be determined by the relative arm lengths of bell crank brackets 96.
  • the force directed to the rim rollers 94 is proportionally greater. Preferably, approximately 2/3 of the force is directed to the rim rollers.
  • FIG. 10 illustrates a third embodiment. It is the same as FIG. 9a except for the addition of an overload mechanism and the connection to frame 50 (which is only at brackets 113 and 116).
  • a hollow block 110 is connected between brackets 96. Block 110 supports a shaft 112. Shaft 112 is vertically movable between aligned holes in brackets 113 and 116. Bracket 113 acts as a stop for up and down movement of shaft 112.
  • Mounted around shaft 112 is a spring 114.
  • Spring 114 is positioned between support bracket 116 and a plate 118 which is pinned to shaft 112 at 119. Attached to plate 118 for movement therewith is a rod 120 with an enlarged end 122.
  • Position of rod 120 is a measure of load conditions and can advantageously be used for indicating or taking action with respect to overload and/or underload conditions.
  • bracket 96 would move upwardly overcoming tension of spring 114 and moving rod 120 upward (the degree of which depends on the magnitude of the load) such that end 122 contacts lever 123 of switch 124.
  • Switch 124 can be used to cut off power to the motor 26 in the up direction.
  • another switch (not shown) positioned below rod 120 can be used for underload conditions to cut off motor power in the down direction.
  • switch 124 could be used to actuate a brake means.
  • FIGS. 11 and 12 show another embodiment.
  • brackets 96 are connected together and to a lever 132 with a shaft 130.
  • Lever 132 is pivotally connected to frame 50 by bolt 134.
  • Bolt 134 is spaced from frame 50 by a bushing 136 which allows for rotation of lever 132.
  • Lever 132 which serves to increase the transmitted motion of brackets 96, has an upwardly protruding knob 138 which is contacted by spring loaded plug 140.
  • Plug 140 is biased by a reeving spring 142 against knob 138. Reeving spring 142 downwardly biases lever 132 and in turn pressure rollers 62 such that pressure rollers 62 will biase cable 12 into groove 58 even when there is no tension in cable 12.
  • the lever 160 of switch 162 in an overload situation, will be activated, this time by the top of cylinder 146, whereby power to the motor in the up direction will be cut off.
  • a nut 164 and spacer 166 which fit around the upper end of cylinder 146 act as a stop for downward movement of cylinder 146 (by contacting bracket 148).
  • FIG. 13 illustrates the connection of the lower assembly - sheave 22, motor 26, casting 30, and gearbox 28.
  • Motor shaft 170 is keyed at 172 to gearbox input shaft 174 which is mounted for rotation between bearing 176.
  • the stationary shaft 175 of gearbox 28 is connected to casting 30 with fasteners 178 and 180.
  • Sheave 22 is mounted for rotation with gearbox 28. Suitable gearing (not shown) would be used to connect gearbox shaft 174 to the housing of gearbox 28 to control rotation of sheave 22.
  • Cable guide 60 is mounted to casting 30 to retain cable 12 within groove 58 as previously described.
  • FIG. 14 illustrates an alternate approach to mount the lower assembly to obtain the relative movement of the sheave to the cable biasing means.
  • the casting 198 which forms a part of the lower assembly (sheave, motor, casting, and gearbox) which is generally indicated at 200, is pivotally connected at 202 to a plate 204.
  • Fastener 202 connects flange 206 of plate 204 and integral bracket 208 of casting 198.
  • flange 210 which has a slot 212 therethrough.
  • a bolt 214 mounted in plate 204 protrudes through slot 212.
  • a washer 216 retains bolt 214 in slot 212.
  • Lower assembly 200 is thus able to pivot up or down relative to upper frame 206 within the range of movement of slot 212 around bolt 214.
  • a cable biasing means (not shown) such as in FIG. 9a would be mounted on upper frame 206 to engage the sheave of lower assembly 200 when the sheave of lower assembly 200 is positioned adjacent thereto, ie., when there is tension in the cable 12.
  • a reeving spring 220 mounted to plate 204 may be used to bias the lower assembly 200 upward to create a reeving force between the sheave and cable biasing means on cable 12.
  • FIGS. 15 - 17 there is shown another embodiment of the invention.
  • the stirrups which join the hoist to the load are used to further stabilize the hoist.
  • This hoist generally indicated at 250 includes the same components as hoist 10, only with some additions and a larger lower assemly casting designated 252.- Identical elements of previous embodiments are designated the same for convenience.
  • Stirrups 254 and 255 are connected to frame 50 of hoist 250 with fasteners 260 and to platform 262 with brackets 264.
  • Roller 266 is mounted for rotation with a shaft 267 and clips 268 and 269 to casting 252 at an upper extended edge of casting 252.
  • Roller 270 is similarly mounted to a lower extended edge of casting 252 located opposite to the upper edge.
  • roller 266 is positioned adjacent stirrup 255 at the upper portion of casting 252 while roller 270 is positioned adjacent stirrup 254 at the bottom of casting 252.
  • Mounted to stirrups 254 and 255 are vertical guide strips 280 and 282 respectfully.
  • Guide strip 280 has a longitudinal groove 284.
  • Strip 282 likewise has a longitudinal groove 286.
  • Roller 266 is positioned to rotate within groove 286.
  • roller 270 is positioned to rotate within groove 284. Because of the positoning of rollers 266 and 270 in vertical grooves, they may only move vertically. This allows the relative movement of casting 252 and attached sheave 22 vertically toward and away from frame 50 and cable biasing means 52.
  • a flange stop 290 at the bottom of strip 280 prevents separation of the lower assembly from the hoist 250 (and limits the relative movement of sheave 22 to cable biasing means 52).
  • the mounting of rollers 266 and 270 within grooved guides 282 and 280 maintains vertical alignment of sheave 22 and cable biasing means 52, and keeps the lower assembly from rotating, ie., due to turning moment from the load and from the location of the motor 26 cg.
  • the guide means of this embodiment may by used in addition to or as an alternate to that shown in FIG. 5 - blocks 84 and 88 with pins 86.
  • FIG. 18 illustrates an alternative to using rollers 266 and 270.
  • This is to use male and female vee guides 300 and 302 respectively.
  • vee guide 300 would be used instead of roller 266 and connected to casting 252 by fasteners 304.
  • Vee guide 300 engages female vee guide 302 (which replaces guide 282) which is connected to stirrup 255 with fasteners 306. The result is the same with guide 300 able to vertically slide within guide 302 while keeping the casting 252 (and therefore the lower assembly) from rotating.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
  • Guides For Winding Or Rewinding, Or Guides For Filamentary Materials (AREA)
  • Carriers, Traveling Bodies, And Overhead Traveling Cranes (AREA)
EP19890118393 1988-10-13 1989-10-04 Appareil de levage Expired - Lifetime EP0363800B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US25733088A 1988-10-13 1988-10-13
US257330 1988-10-13

Publications (2)

Publication Number Publication Date
EP0363800A1 true EP0363800A1 (fr) 1990-04-18
EP0363800B1 EP0363800B1 (fr) 1994-01-19

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ID=22975853

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890118393 Expired - Lifetime EP0363800B1 (fr) 1988-10-13 1989-10-04 Appareil de levage

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EP (1) EP0363800B1 (fr)
JP (1) JP2657551B2 (fr)
DE (1) DE68912495T2 (fr)
ES (1) ES2047640T3 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0668239A1 (fr) * 1994-02-22 1995-08-23 Tma Tecnologie Meccaniche Avanzate S.R.L. Dispositif de limitation de traction pour treuils
EP0677480A1 (fr) * 1994-03-24 1995-10-18 Gebrueder Roeck Ohg - Snc D. Simon Roeck Dispositif compact de traction pour câbles
WO2012052593A1 (fr) * 2010-10-21 2012-04-26 Elevadores Goian, S.L. Appareil élévateur par câble
WO2013004663A1 (fr) * 2011-07-04 2013-01-10 Tractel Greifzug Gmbh Treuil à câble sans fin
EP4371923A1 (fr) * 2022-11-21 2024-05-22 Goodrich Corporation Suiveur de câble

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1173755B (de) * 1960-02-19 1964-07-09 Borg Warner Selbstspannender Riementrieb mit schwenkbarem Motor, vorzugsweise fuer Waschmaschinen
FR2307761A1 (fr) * 1975-04-18 1976-11-12 Dressler Bruno Palan auto-elevateur
EP0050073A1 (fr) * 1980-10-09 1982-04-21 Tractel S.A. Treuil à moteur électrique avec poulie à gorge de coincement pour l'actionnement d'un câble de traction ou de levage à brin libre
GB2093149A (en) * 1981-02-14 1982-08-25 Packaged Air Conditioning Equi Drive unit
GB2110632A (en) * 1979-06-01 1983-06-22 Tractel Sa Cable traction or hoisting apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1173755B (de) * 1960-02-19 1964-07-09 Borg Warner Selbstspannender Riementrieb mit schwenkbarem Motor, vorzugsweise fuer Waschmaschinen
FR2307761A1 (fr) * 1975-04-18 1976-11-12 Dressler Bruno Palan auto-elevateur
GB2110632A (en) * 1979-06-01 1983-06-22 Tractel Sa Cable traction or hoisting apparatus
EP0050073A1 (fr) * 1980-10-09 1982-04-21 Tractel S.A. Treuil à moteur électrique avec poulie à gorge de coincement pour l'actionnement d'un câble de traction ou de levage à brin libre
GB2093149A (en) * 1981-02-14 1982-08-25 Packaged Air Conditioning Equi Drive unit

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0668239A1 (fr) * 1994-02-22 1995-08-23 Tma Tecnologie Meccaniche Avanzate S.R.L. Dispositif de limitation de traction pour treuils
EP0677480A1 (fr) * 1994-03-24 1995-10-18 Gebrueder Roeck Ohg - Snc D. Simon Roeck Dispositif compact de traction pour câbles
WO2012052593A1 (fr) * 2010-10-21 2012-04-26 Elevadores Goian, S.L. Appareil élévateur par câble
WO2013004663A1 (fr) * 2011-07-04 2013-01-10 Tractel Greifzug Gmbh Treuil à câble sans fin
US9422140B2 (en) 2011-07-04 2016-08-23 Tractel Greifzug Gmbh Endless cable winch with overload protection
EP4371923A1 (fr) * 2022-11-21 2024-05-22 Goodrich Corporation Suiveur de câble

Also Published As

Publication number Publication date
DE68912495T2 (de) 1994-05-11
JP2657551B2 (ja) 1997-09-24
ES2047640T3 (es) 1994-03-01
JPH02138099A (ja) 1990-05-28
DE68912495D1 (de) 1994-03-03
EP0363800B1 (fr) 1994-01-19

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