US3810529A - Elevator system - Google Patents

Elevator system Download PDF

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Publication number
US3810529A
US3810529A US00364162A US36416273A US3810529A US 3810529 A US3810529 A US 3810529A US 00364162 A US00364162 A US 00364162A US 36416273 A US36416273 A US 36416273A US 3810529 A US3810529 A US 3810529A
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US
United States
Prior art keywords
members
chain
sheave
elevator system
counterweight
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.)
Expired - Lifetime
Application number
US00364162A
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English (en)
Inventor
L Tosato
F Solymos
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.)
CBS Corp
Original Assignee
Westinghouse Electric Corp
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
Priority to US00364162A priority Critical patent/US3810529A/en
Application filed by Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Priority to CA199,702A priority patent/CA974900A/en
Publication of US3810529A publication Critical patent/US3810529A/en
Application granted granted Critical
Priority to AU68997/74A priority patent/AU492513B2/en
Priority to BE1005982A priority patent/BE815461A/xx
Priority to BR4162/74A priority patent/BR7404162D0/pt
Priority to GB2307874A priority patent/GB1465166A/en
Priority to DE19742425216 priority patent/DE2425216A1/de
Priority to ES426626A priority patent/ES426626A1/es
Priority to IT41604/74A priority patent/IT1013905B/it
Priority to JP5923474A priority patent/JPS5346333B2/ja
Priority to FR7418193A priority patent/FR2230575B1/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
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B7/00—Other common features of elevators
    • B66B7/06—Arrangements of ropes or cables
    • B66B7/068—Cable weight compensating devices

Definitions

  • Compensation for the hoisting roping includes a chain which interconnects the car and counterweight, and a compensator sheave which guides and tensions the chain.
  • the sheave includes a circumferential groove formed by first and second axially spaced elastomeric members, with the grooves being sized such that alternate links of the chain extend edgewise into the groove, while the intervening links rest against the outer peripheries of the first and second members.
  • FIG ELEVATOR SYSTEM BACKGROUND OFTHE INVENTION 1.
  • Field of the Invention relates in general to elevator systems, and more specifically to elevator systems which utilize chain compensation for the hoisting roping.
  • Resilient spacers while successfully increasing the top speed limit of a chain compensated elevatorsystem to about 500 feet per minute, reduce the economic advantage of chains over wire ropes, since the resilient spacers are disposed over alternate links of the chain over substantially the complete length of the chain. Further, while the noise created by the chain striking the sides of the hoistway is reduced, it would be desirable to completely eliminate chain sway, if it can be accomplished economically and without creating maintenance problems.
  • the present invention is a new and improved elevator system which includes an elevator car and counterweight interconnected via hoist roping. and via compensation for the weight of the hoist roping.
  • the compensation includes a link chain and a sheave.
  • the link chain is connected to the bottoms of the car and counterweight, extending downwardly therefrom about the sheave, which is disposed in the pit.
  • the sheave includes elastomeric means disposed about its periphery.
  • the elastomeric means may be a single structure having first and second axially spaced members which extend outwardly from a common back portion to define a circumferential groove; or, it may include first and second independent members which are held in spaced relation to provide a circumferential groove.
  • the first and second members are substantially cylindrical and tubular in cross-sectional configuration.
  • the first and second members are sized and axially spaced such that alternate links of the chain extend edgewise into the circumferential groove while the intervening links remain outside the groove, the flat broad sides of which are supported by the outer peripheries of the first and second members.
  • the depth of the groove is selected such that it exceeds the dimension of the portion of the link which extends into the groove, precluding any digging of the link into the elastomeric material or the backing support therefor.
  • the sides of the members which define the groove support and contact opposite sides of the links which extend therein, providing a positive guide for the chain.
  • Compression of the first and second members by the flatwise sides of the chain links compresses the cylindrical members into an elliptical configuration which reduces the width of the circumferential groove to provide a firm guide for different chain sizes without the necessity of changing the unstressed width of the circumferential grooves.
  • FIG. 3 is a fragmentary view of one edge of the sheave shown in FIG. 2;
  • FIGS. 4,5, 6, 7 and 8 are cross-sectional views of a portion of the sheave shown in FIG. 2, taken between the arrows IV-IV, illustrating different structural arrangements which may be used for providing a circumferential groove in the sheave;
  • FIG. 9 is a perspective view of an elevator system which may be constructed according to the teachings of the invention.
  • Elevator system 10 includes an elevator car 12 mounted for movement in a hoistway 14 of a structure or building having a plurality of floors, indicated generally at 16, which floors are served bythe elevator car 12.
  • An elevator drive motor 18 may be mounted on the floor of a penthouse in the building, which floor is illustrated generally by line 20, with the drive motor having a drive shaft 22 to which a traction sheave 24 is secured.
  • An idler or deflection sheave 26 may be secured to the lower surface of the penthouse floor 20, if required.
  • Hoist ropes or cables 28 interconnect the elevator car 12 with a counterweight 30.
  • Buffers for the car and counterweight 30 are also disposed in the pit, but they are not shown as they may be conventional.
  • Sheave 36 is constructed according to the teachings of the invention to reduce the operating noise of the chain 32, to prevent sway of the chain 32 'at all elevator speeds, and to accomplish these silencing and guiding functions without incurring offsetting economic penalties such as excessive initial cost, increased maintenance, or both. Sheave 36 is also constructed to achieve theseresults when used with elevator speeds up to about 700 feet per minute, allowing chain compensation to be used at elevator speeds at which only rope compensation was heretofore considered practical.
  • FIGS. 2 and 3 are side and end elevational views, respectively, of sheave 36, which views are shown partially cut away in order to more clearly illustrate the teachings of the invention.
  • sheave 36 may be'of any suitable conventional construction, including a cylindrical outer metallic member 40, an inner metallic structure 41 having a opening for receiving a shaft 42 upon which the sheave 36 is rotatably mounted, and means shown generally at 44, such as a web or plurality of spokes, for supporting member 40 from the inner structure 41.
  • Elastomeric means 50 is disposed about the outer peripheiy of cylindrical member 40, providing a circumferential groove 52 about the outer periphery of the sheave 36.
  • Elastomeric means 50 includes first and second axially spaced members 54 and 56 which are disposed between plate-like metallic guide members 58 and 60.
  • Guide members 58 and 60 which may be washer or disc shaped, are firmly secured to opposite sides of the cylindrical member 40, such as by screws 62, to form a circumferential trough or channel about sheave 36.
  • the construction of the elastomeric means 50 and its dimensional relationship with the chain 32 may be more readily apparent by observing cross-sectional views of the elastomeric means and chain, with the elastomeric means 50 constructed according to different embodiments of the invention in the different views.
  • FIG. 4 is a cross-sectional view of elastomeric means 50 and chain 32 taken between and in the direction of arrows IV-IV as illustrated in FIG. 2.
  • the first and second members 54 and 56 are independent in this embodiment, i.e., not connected to one another, each having a circular cross-sectional configuration, and each formed of a solid rod of elastomeric material.
  • the elastomeric material is preferably polyurethane, because of its excellent wear characteristics, but any suitable elastomer may be used.
  • the members are each formed into a continuous loop having an inside diameter equal to the outside diameter of the cylindrical member 40.
  • the outside diameter of the material from which members 54 and 56 are formed is selected to provide a gap between the members 54 and 56 when these members are placed within the channel formed by guide members 58 and 60 and axially spaced such that they contact the guide members 58 and 60, respectively.
  • the chain 32 is an ordinary link chain having a series of interconnected metallic links, with alternate links 72 being of like orientation, and the intervening links 74 being of like orientation.
  • the centerline 76 through the opening of link 72 extends in the same direction as and parallel to the centerline 37 of the sheave 36, while the centerline 78 of link 74 extends in a direction perpendicular to the direction of centerline 37.
  • the alternate links 72 extend edgewise into the circumferential groove 52 provided by gap 70, while the intervening links 74 lie flatwise on the outer peripheries of membe'rs 54 and 56.
  • the edgewise dimension of the links .72 which is the dimension of the stock from which the links are made, is about the same as the dimension of gap 70, and there may be a slight interference fit between the link stock and the dimension of gap 70 in order to accommodate different sizes of chains without modification of the sheave, and still provide a positive guide for the edgewise oriented links 72.
  • the imaginary lines 80 and 82 of the stock which forms the two sides of link 74 which lines are parallel with the centerline 78 of the opening of link 74, extend through the axes of members 54 and 56, but different sizes of chains may vary this relationship somewhat while still resting the sides of the intervening links against the outer peripheries of members 54 and 56.
  • FIG. 5 is a cross-sectional view which is similar to that of FIG.
  • members 54 and 56 are modified in FIG. 5, they will be referred to as members 54' and 56' when describing this embodiment.
  • Members 54' and 56' define central openings 92 and 94, respectively, with the wall thickness being selected to provide the desired compression of members 54' and 56', and thus the desired dimensional change of the circumferential groove 52, as the members 54' and 56' are compressed or stressed.
  • FIG. 6 is a view which is similar to that shown in FIG. 5, with FIG. 5 representing the relationship of the chain 32 and elastomeric means 50 just prior to the chains compression of the elastomeric means, and FIG. 6 represents their relationship after members 54' and 56' are compressed.
  • the central axis 91 of the side of chain link 72 which extends into the circumferential groove 52 moves downwardly by a dimension 96.
  • the movement of the axis 91 oflink 72 below the axes 93 and 95 of members 54' and 56, respectively, as viewed in FIG. 6, is desirable as it exerts an even greater aligning force on the links 72.
  • the sides of the members 54' and 56' which define the gap dimension 70 of groove 52 tend to pull the chain links 72 towards the bottom 90 of the groove.
  • elastomeric member 100 includes solid projections 102 and 104 which extend outwardly in spaced relation from a common side of a back portion 106.
  • Elastomeric member 100 has a smooth inner surface defining a diameter selected to snugly fit the outside diameter of the cylindrical member 40.
  • the projections 102 and 104 preferably have a substantially circular cross-sectional configuration, except of course where they are connected to the back portion 106, and they function as hereinbefore described relative to the embodiment of the invention shown in FIG. 4.
  • the members 102 and 104 may function to reduce the gap dimension solely by compression of the members by the flatwise oriented links 74, in which event the bottom of the groove would be disposed in the location illustrated by the broken line 110, which location is substantially tangent to the circular configuration of members 102 and 104.
  • the reduction in the width of the of the circumferential groove 52 may also be accomplished by a combination of compression and cantilever bending of members 102 and 104, if desired, by lowering the bottom of the groove to the location indicated by reference numeral 112 in FIG. 7.
  • FIG. 8 illustrates an embodiment of the invention which is similar to the embodiment shown in FIG. 7, except members 102 and 104 are hollow or tubular. Since member is modified in this embodiment, it is referred to as elastomeric member 100', and its extensions are referred to with reference numerals 102 and 104. As illustrated, projections 102' and 104 define central openings 114 and 116, respectively, and they function as hereinbefore described relative to the embodiment of the invention shown in F I65. 5 and 6.
  • any conventional lockdown arrangement may be used, or the lockdown arrangement disclosed in co-pending application Ser. No. 347,285, filed Apr. 2, 1973, which is assigned to the same ass'ignee as the present application, may be used.
  • a compensation system with a lockdown feature applies a predetermined tension to the compensating rope or chain while automatically accommodating permanent and elastic changes in the length of the hoisting rope.
  • the upward movement of the sheave is limited, in order to tie the car and counterweight together to achieve similar rates of deceleration for both the car and counterweight during a buffer stop of either, or a safety stop of the car.
  • FIG. 9 is a perspective view of an elevator system which includes tensioning and lockdown apparatus 122 which may utilize the teachings of the invention hereinbefore described.
  • an elevator car 124 and counterweight 126 are interconnected by hoist roping 128 which is reeved about a traction sheave (not shown), with the traction sheave being driven by drive means shown generally at 130.
  • Two ordinary link chains 132 and 134 are used to provide compensation for the hoist roping 128, with the chains being ,connected to points spaced equally on opposite sides of the center gravity of the car, and to similar points on the counterweight.
  • the spacing 136 between the two chains may be any suitable dimension.
  • the car and counterweight buffers may be disposed between the chains, in which event the dimension 136 would be greater than illustrated in H0. 9.
  • Each chain has the ends of its loop spread by a dimension which is much greater than would be provided by a natural loop, to provide good car balance, without requiring the use of a sheave having the necessarily large diameter required to achieve this spread.
  • This resuit is obtained by using two smaller diameter sheaves for each chain. The distance between the axes of these smaller diameter sheaves is made adjustable so that the desired chain spread may be obtained without changing the construction of the sheaves themselves.
  • chain 132 is disposed to run about first and second sheaves 140 and 142
  • chain 134 is disposed to run about first and second sheaves 144 and 146, with these sheaves each being constructed as hereinbefore disclosed relative to sheave 36 shown in FIG.
  • Sheaves 140 and -144 are mounted for rotation on a mension 152 between axes 148 and 150 is selected for each application, and is adjustable so field changes may be made, if necessary.
  • Sheaves 140, 142, 144 and 146 are mounted on a common frame 160, and the frame 160 is pivotable about axis 162 in a vertical plane.
  • Frame 160 may be constructed of two spaced angles 164 and 166, with a plurality of openings 168 disposed in the facing portions of the angles for rotatably mounting the sheaves and for adjusting the dimension 152 between the sheaves.
  • Means for pivoting the frame 160 is provided at one end thereof, such as a hinge for each angle, with ahinge 170 for angle 164 being illustrated in the figure.
  • One side of the hinge 170 is connected to the angle 164, and the other side is fixed to a vertically extending mounting member, such as angle 172. in like manner, a hinge would be connected to angle 166, and to a vertical mounting member or angle 174.
  • the frame 160 is biased downwardly about the pivot axis 162 by any suitable biasing means, such as compression springs 176 and 178, but a single spring may be used if desired.
  • Rod members 180 and 182 each have one end fixed to angles 172 and 174, respectively, and they extend through openings in angles 164 and 166, through lower spring seats 184 and 186, through springs 176 and 178, and through openings in upper spring seats 188 and 190, respectively.
  • the outwardly extending ends of the rod members 180 and 182 are threaded, and nuts 192 and 194 are disposed thereon and advanced to the point necessary to urge the upper spring seats 188 and 190 against the springs in order to compress them and provide the proper bias, and thus the desired tension in the chains 132 and 134.
  • Elastic and permanent stretch of the hoisting rope is automatically accommodated, and upward movement of the sheaves is limited when the springs 176 and 178 pipe, to prevent slack in the chains due to buffer and safety stops.
  • An elevator system comprising:
  • a compensating chain having a plurality of interconnected links, said compensating chain interconnecting said car and counterweight,
  • tensioning means for tensioning and guiding said compensating chain
  • said elastomeric means including first and second axially spaced members disposed about the outer periphery of said sheave to define a circumferential groove therein having a predetermined width dimension
  • said first and second members of the elastomeric means being shaped and spaced such that alternate links of said compensating chain extend edgewise into the circumferential groove, contacting the spaced opposed sides of the first and second members, and the intervening links of said compensating chain rest against the outer peripheries of said first and second members.
  • first and second tubular members are dimensioned such that the tensioned compensating chain compresses a portion of each of the tubular members into a substantially elliptical cross-sectional configuration, reducing the width dimension of the circumferential groove.
  • the tensioning means includes support means pivotally mounted at a point located below the travel paths of the elevator car and counterweight, with the sheave being rotatably mounted on said support means, and
  • port means permits limited pivotal movement thereof, preventing movement which attempts to raise the sheave beyond a predetermined point.

Landscapes

  • Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
  • Gears, Cams (AREA)
US00364162A 1973-05-25 1973-05-25 Elevator system Expired - Lifetime US3810529A (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
US00364162A US3810529A (en) 1973-05-25 1973-05-25 Elevator system
CA199,702A CA974900A (en) 1973-05-25 1974-05-13 Elevator system
AU68997/74A AU492513B2 (en) 1973-05-25 1974-05-15 Improvements in or relating to elevator system
BE1005982A BE815461A (fr) 1973-05-25 1974-05-22 Systeme d'ascenseur
BR4162/74A BR7404162D0 (pt) 1973-05-25 1974-05-22 Sistema de elevador
GB2307874A GB1465166A (en) 1973-05-25 1974-05-23 Elevator system
DE19742425216 DE2425216A1 (de) 1973-05-25 1974-05-24 Schallgedaempfter kettenspanner fuer die ausgleichskette eines aufzugs
IT41604/74A IT1013905B (it) 1973-05-25 1974-05-24 Impianto d ascensore con compen sazione a catena dei cavi di sol levamento
ES426626A ES426626A1 (es) 1973-05-25 1974-05-24 Un sistema de ascensor perfeccionado.
JP5923474A JPS5346333B2 (it) 1973-05-25 1974-05-25
FR7418193A FR2230575B1 (it) 1973-05-25 1974-05-27

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00364162A US3810529A (en) 1973-05-25 1973-05-25 Elevator system

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US3810529A true US3810529A (en) 1974-05-14

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US00364162A Expired - Lifetime US3810529A (en) 1973-05-25 1973-05-25 Elevator system

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US (1) US3810529A (it)
JP (1) JPS5346333B2 (it)
BE (1) BE815461A (it)
BR (1) BR7404162D0 (it)
CA (1) CA974900A (it)
DE (1) DE2425216A1 (it)
ES (1) ES426626A1 (it)
FR (1) FR2230575B1 (it)
GB (1) GB1465166A (it)
IT (1) IT1013905B (it)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4230205A (en) * 1978-05-10 1980-10-28 Westinghouse Electric Corp. Elevator system
EP1142816A1 (de) * 2000-03-31 2001-10-10 Inventio Ag Hydraulische Spann- und Dämpfungsvorrichtung für Aufzug
US6431321B2 (en) 2000-03-31 2002-08-13 Inventio Ag Tensioning device for at least one trailing rope of an elevator installation
US6488125B1 (en) * 1998-03-12 2002-12-03 Kabushiki Kaisha Toshiba Traction elevator
US6860367B1 (en) * 1998-09-29 2005-03-01 Otis Elevator Company Elevator system having drive motor located below the elevator car
US20050133312A1 (en) * 2003-08-12 2005-06-23 Draka Elevator Products, Inc. Dampening device for an elevator compensating cable and associated system and method
US20070063175A1 (en) * 2005-09-09 2007-03-22 J.R. Clancy, Inc. Counterweight Assisted Winch
WO2012034899A1 (de) 2010-09-17 2012-03-22 Inventio Ag Aufzug mit einer aufzugskabine und einem gegengewicht
GB2538790A (en) * 2015-05-29 2016-11-30 Lewmar Ltd Gypsy for windlass and method for its manufacture
CN113247738A (zh) * 2021-05-21 2021-08-13 上海三菱电梯有限公司 电梯补偿装置

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5629346Y2 (it) * 1976-02-03 1981-07-13
JPS52153545A (en) * 1976-06-17 1977-12-20 Mitsubishi Electric Corp Block device for elevator
JPS5931653Y2 (ja) * 1978-07-26 1984-09-06 フジテツク株式会社 エレベ−タ装置
JPS5651288A (en) * 1979-10-02 1981-05-08 Toshiba Corp Control system for making dissolved oxygen in aeration tank constant
DE50114535D1 (de) 2000-03-31 2009-01-15 Inventio Ag Mechanische Spannvorrichtung für Unterseil eines Aufzugs

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3279762A (en) * 1964-03-11 1966-10-18 Otis Elevator Co Noise abating and traction improving elevator sheave

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3279762A (en) * 1964-03-11 1966-10-18 Otis Elevator Co Noise abating and traction improving elevator sheave

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4230205A (en) * 1978-05-10 1980-10-28 Westinghouse Electric Corp. Elevator system
US6488125B1 (en) * 1998-03-12 2002-12-03 Kabushiki Kaisha Toshiba Traction elevator
US6712183B2 (en) 1998-03-12 2004-03-30 Kabushiki Kaisha Toshiba Traction elevator
US6860367B1 (en) * 1998-09-29 2005-03-01 Otis Elevator Company Elevator system having drive motor located below the elevator car
EP1142816A1 (de) * 2000-03-31 2001-10-10 Inventio Ag Hydraulische Spann- und Dämpfungsvorrichtung für Aufzug
US6431321B2 (en) 2000-03-31 2002-08-13 Inventio Ag Tensioning device for at least one trailing rope of an elevator installation
US20050133312A1 (en) * 2003-08-12 2005-06-23 Draka Elevator Products, Inc. Dampening device for an elevator compensating cable and associated system and method
US7117978B2 (en) 2003-08-12 2006-10-10 Draka Elevator Products, Inc. Dampening device for an elevator compensating cable and associated system and method
US20070063175A1 (en) * 2005-09-09 2007-03-22 J.R. Clancy, Inc. Counterweight Assisted Winch
US7264228B2 (en) * 2005-09-09 2007-09-04 J. R. Clancy, Inc. Counterweight assisted winch
WO2012034899A1 (de) 2010-09-17 2012-03-22 Inventio Ag Aufzug mit einer aufzugskabine und einem gegengewicht
GB2538790A (en) * 2015-05-29 2016-11-30 Lewmar Ltd Gypsy for windlass and method for its manufacture
US10450173B2 (en) 2015-05-29 2019-10-22 Lewmar Limited Gypsy for windlass and method for its manufacture
CN113247738A (zh) * 2021-05-21 2021-08-13 上海三菱电梯有限公司 电梯补偿装置

Also Published As

Publication number Publication date
FR2230575B1 (it) 1977-10-14
BE815461A (fr) 1974-11-22
CA974900A (en) 1975-09-23
JPS5346333B2 (it) 1978-12-13
FR2230575A1 (it) 1974-12-20
GB1465166A (en) 1977-02-23
JPS5020449A (it) 1975-03-04
BR7404162D0 (pt) 1975-01-07
ES426626A1 (es) 1976-07-01
IT1013905B (it) 1977-03-30
AU6899774A (en) 1975-11-20
DE2425216A1 (de) 1974-12-12

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