US3789972A - Transportation device - Google Patents

Transportation device Download PDF

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Publication number
US3789972A
US3789972A US00283679A US3789972DA US3789972A US 3789972 A US3789972 A US 3789972A US 00283679 A US00283679 A US 00283679A US 3789972D A US3789972D A US 3789972DA US 3789972 A US3789972 A US 3789972A
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United States
Prior art keywords
platform
axle
fixed
platforms
locking
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Expired - Lifetime
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US00283679A
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English (en)
Inventor
J Kraft
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
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B23/00—Component parts of escalators or moving walkways
    • B66B23/08—Carrying surfaces
    • B66B23/12—Steps

Definitions

  • ABSTRACT A transportation device including a flexible unit hav- 1521 US. 01 198/16 R ing spaced axles driven about a closed p which 51 1111.01. B65b 9/12 cludes a load bearing A plurality of Steps, p [58] Field of Search 1. 198/16, 17, 18 forms or pallets are detachably fixed t9 the axles y a clamping arrangement which permits removal of the 56] R f e Ci d steps, platforms or pallets anywhere on the load bearl'lll'l WithOUt disassembly Of the StpS, platforms or pallets, the drive system, or surrounding structure.
  • the invention relates in general to transportation devices for moving people from one landing to another, and more specifically to transportation devices, such as movable stairways and movable walkways, having a plurality of steps, platforms or pallets.
  • Transportation devices for moving people from one landing to another of the type which have a plurality of steps, platforms or pallets thereon, such as movable stairways and movable walkways, conventionally utilize a flexible unit having a plurality of spaced, parallel axles thereon. A step, platform or pallet is clamped to each axle.
  • the removal and replacement operation is time consuming and dirty, adding significantly to the maintenance cost of the transportation device.
  • the present invention is a new and improved transportation device, such as a movable stairway or movable walkway having an endless, flexible unit which includes a plurality of spaced, parallel axles.
  • a step, platform or pallet is detachably clamped to each axle.
  • the unit is driven about a closed loop by drive means, with the loop including an upper load bearing run.
  • the steps, platforms or pallets are removable and replaceable from any location on the load bearing run, without disassembly of a step, platform, pallet, balustrade, or any part of the drive and guide system.
  • the clamping means for clamping the steps, platforms or pallets to the axles includes a movable portion and a fixed portion, with the movable portion being actuated by the step axle to the proper clamped position when the step, platform or pallet is placed on the axle.
  • Locking means for locking and unlocking the clamp in the clamped position is accessible via access openings in the step. Removal of a step after the clamp is unlocked automatically actuates the movable portion of the clamp to its unclamped configuration.
  • FIG. 1 is a schematic view in side elevation of a transportation device which may embody the invention
  • FIG. 2 is a fragmentary, perspective view of a movable stairway, with parts removed and/or cut away. which illustrates a step clamped to a step axle according to the teachings of the invention
  • FIG. 3 is a side elevation of the step shown in FIG.
  • FIG. 4 is a fragmentary view of the step shown in FIG. 3, illustrating the step as it is being removed from, or being placed on, a step axle;
  • FIGS. 5 and 6 are side and plan views of the movable portion of the clamping means employed in the embodiment of the invention shown in FIGS. 2, 3 and 4;
  • FIG. 7 is a fragmentary view of a step illustrating clamping means constructed according to another embodiment of the invention.
  • FIG. 1 there is shown a transportation device 10 which may utilize the teachings of the invention. While the invention is equally applicable to moving walkways having an endless series of rigid segments or platforms, commonly called pallets, it will be described relative to a movable stairway.
  • Device 10 employs a conveyor portion 12 for transporting passengers between a first landing l4 and a second landing l6.
  • Conveyor 12 is of the endless type, having a flexible unit 14 which is driven about a closed path.
  • the invention may be utilized with any type of movable stairway, its use is particularly advantageous with the modular passenger conveyor construction disclosed in co-pendin g application Ser. No. 91,846, filed Nov. 23, 1970, now U.S. Pat. 3,707,220, which is assigned to the same assignee as the present application, and the invention will be described relative to such construction.
  • Conveyor 12 includes an upper load bearing run 17 upon which the passengers stand while being transported between the landings l4 and 16, and a lower return run 18.
  • a balustrade 20 is disposed above the conveyor 12 which guides a continuous, flexible handrail 24.
  • the balustrade 20 may be transparent as indicated, or opaque, as desired.
  • Conveyor 12 includes a plurality of steps 26, only a few of which are shown in FIG. 1. These steps 26 move in a closed path, driven by a modular drive unit 28, such as disclosed in U.S. Pat. No. 3,677,388, which is assigned to the same assignee as the present application.
  • the endless, flexible unit or belt 14 is formed of pivotally interconnected toothed links 30, to which the steps 26 are connected, as will be hereinafter explained.
  • the steps 26 are supported by main and trailer rollers or wheels which cooperate with main tracks and trailer tracks, respectively, to guide the steps 26 in the endless path.
  • Modular drive unit 28 includes sprocket wheels and chains which engage the toothed links 30 of the conveyor 12, to pull the flexible unit 14 up the incline between the landings 14 and 16.
  • FIG. 2 is a fragmentary, perspective view of a step 26 disposed on the load bearing run 17 of the conveyor 12, with parts removed and/or broken away in order to better illustrate the teachings of the invention. More specifically, first and second closed loops 32 and 34 each of which are formed of the pivotally interconnected toothed links 30 are disposed in spaced, side-by-side relation, with the planes of the loops being vertical.
  • the toothed links 30 may be formed of stacked, metallic laminations, such that their ends dovetail, enabling openings in their ends to be aligned while also aligning the toothed links 30.
  • Main wheels or rollers 38 and 39 are mounted on opposite ends of the step axle 36, which rollers are guided about the closed path by c-shaped tracks 40 and 41, respectively.
  • the step axles 36 have metallic shoulder members 42 and 44 disposed thereon which axially locate the steps 26 on the step axle, and resilient, elastomeric bushings 46 and 48 may also be disposed on the step axles 36, adjacent the alignment shoulders 42 and 44, respectively.
  • the steps may be clamped to the bushings 46 and 48, in order to reduce noise and vibration which may otherwise be transmitted from the modular drive unit 28 and the loops of toothed links 30, to the steps 26 upon which the passengers ride.
  • Each of the steps 26 includes right and left-hand step brackets 50 and 52, respectively, a cleated riser 54 which extends between the step brackets on one end thereof, and a treadboard 56, which also extends between the step brackets, forming the surface upon which the passengers stand.
  • the ends of the step brackets 50 and 52 which are adjacent the riser 54 are provided with trailer wheels 58 and 60, respectively, and the opposite ends, adjacent tread-board 56, are provided with clamping means 62 and 64.
  • Clamping means 62, associated with the left-hand step bracket is shown in FIG. 2, and clamping means 64, which is associated with the right-hand step bracket 50, is shown in FIGS. 3 and 4.
  • the clamping means 62 of FIG. 2 is illustrated clamped about a resilient bushing 66, while clamping means 64 is shown clamped about a resilient bushing 68 in FIG. 3.
  • the trailer rollers 58 and 60 ride on L-shaped tracks 70 and 72, respectively.
  • the steps 26 are in the load bearing run 17 of the conveyor 12, at any location between landings l4 and 16, they may be removed by unlocking clamping means 62 and 64 via access openings provided in the steps 26.
  • the clamping means 62 and 64 are each unlocked, the steps 26 may simply be pivoted upwardly on their trailer wheels and removed.
  • the trailer wheels 58 and 60 are placed on the tracks 70 and 72, respectively, and
  • the step axle itself actuates the clamping means to their clamping positions on the axle, and the locking means is then actuated through openings in the step, preferably through the treadboard 56.
  • a modular drive unit such as modular drive unit 28
  • it requires only a minute or two to stop the conveyor 12 and remove the steps which are immediately above the drive unit.
  • the steps do not have to be disassembled.
  • the balustrade and skirt are not dismantled.
  • the floor plate and tracks of the drive assembly remain undisturbed.
  • FIG. 3 is an elevational view of step 26 shown in FIG. 2, showing the right-hand side of the step, with the clamping means in its closed or clamped position.
  • FIG. 4 is a fragmentary view of the step shown in FIG. 3, illustrating the clamping means in its open or unclamped position.
  • Clamping means 64 includes a movable portion 80, shown more clearly in FIGS. 5 and 6, which are side and plan views thereof respectively, a stationary portion 82, and locking means 84.
  • the stationary portion 82 which may be formed integrally with the step bracket, includes a curved, concave surface'86, which has a cross-section defining a semi-circle having a radius selected to be substantially the same as the radius of the resilient bushing 68.
  • Movable portion of the clamping means 64 includes a curved, concave surface 88, which also has a cross-sectional configuration which defines a semi-circle having a radius substantially equal to the radius of bushing 68.
  • the movable portion 80 of the clamping means is pivotally mounted to the step bracket 50 via a pin disposed through aligned openings in the step bracket 50 and through an extension 91 of the movable portion 80.
  • Movable portion 80 as illustrated in FIGS. 5 and 6, has an opening 92 disposed through the extension 91 for receiving the pin 90.
  • the openings in the step bracket 50 and in the movable portion 80 of the clamping means are preferably drilled with the movable portion 80 assembled with the fixed portion 82 by the screw 104.
  • the clamping means 64 is then bored during final assembly to obtain the desired close fit with the bushing 68.
  • the locking means 84 includes first and second cooperative portions and 102, respectively, which are associated with the fixed and movable portions 82 and 80 of the clamping means 64, respectively.
  • a first portion 100 includes a screw 104 having a head 106 of the type which may be turned by the insertion of a tool 108 through an opening in the step 26, such as through opening 110 disposed through the treadboard 56, which opening is aligned with the screw 104.
  • screw 104 may have a hex-shaped Allen head, and tool 108 will thus be an Allen wrench.
  • This arrangement requires a very small access opening through the treadboard 56, which conveniently may fall between the ridges of the treadboard and thus be virtually unnoticed. Screw 104 is held captive by the first portion 100, preventing the screw 104 from being backed completely out of a threaded portion 112 of the locking means 84.
  • the second portion 102 of the locking means 84 includes a threaded portion 114, which is aligned with the threaded portion 112 of the fixed portion of the locking means when the clamping means 64 is clamped about the step axle 36.
  • This arrangement provides a positive locking function, as it is not possible to tighten the screw 104 unless it is properly engaged with the threaded portion 114 of the movable portion of the clamping means.
  • Movable portion 80 of clamping means 64 is actuated to its clamping position when the step 26 is placed on the inclined portion of the load bearing run 17, with its trailer wheels disposed on the trailer tracks, and thenit is dropped or pivoted into operating position.
  • This function may be performed by providing the movable portion 80 with an extension 116 dimensioned to strike the step axle 36 as the step 26 is pivoted into its operating position.
  • the step 26 may be pivoted into operating position after the trailer wheels 58 and 60 are placed on the trailer tracks 70 and 72, respectively, with the center line of the stationary portion 82 of the clamping means following the dashed curve 120, which also intersects the center line of the step axle 36.
  • the stationary portion 82 of the clamping means is shaped to allow the extension 116 to clear the stationary portion as the movable portion pivots into place under the bushing 68.
  • FIG. 7 is a fragmentary view of a step 26' illustrating clamping means 64 constructed according to another embodiment of the invention.
  • Clamping means 64' is automatically actuated to its clamping configuration about axle 36, as hereinbefore described relative to clamping means 64.
  • Clamping means 64' includes locking means 84 which automatically latches or locks the clamping means 64 in its clamped configuration, eliminating the separate step of actuating No. the locking means to its locked condition.
  • Locking means 84 is unlocked or unlatched by using a tool 108 disposed through an access opening 110 in the treadway 56.
  • the locking means 84 includes a portion 200 associated with the stationary portion 82 of the clamping means, a portion 202 associated with the movable portion 80 of the clamping means, and a spring member 204 has one end fixed to one portion of the locking means 84, such as portion 202, and its other end includes a curved portion 206.
  • the clamping means 64 is actuated to its clamped configuration, the curved portion 206 is cammed against the bias of spring member 204 until the curved end 206 clears a shoulder on portion 200, at which point the curved portion snaps over the shoulder, under the influence of the urging of the spring member 204, to latch or lock the clamping means in its clamped configuration about axle 36.
  • Opening 110 in the treadway is disposed to align the tool with curved portion 206, enabling an inward force on the tool to release the latch or lock.
  • a movable stairway of the type which has a plurality of steps connected to step axles.
  • Each of the steps may be quickly and easily removed, or replaced, on its associated step axle, any place on the load bearing run of the incline, without dismantling a step, a balustrade, or any part of the driving or guiding means of the conveyor.
  • Replacement of the step into its operating position merely requires that the trailer wheels of the step be placed on their respective tracks, and the step pivoted into position.
  • the step axle itself actuates the clamping means into the clamped position, preparatory to locking the clamps by inserting the tool through access openings in the step, or the clamping means may be self-locking in its clamped configuration.
  • Transportation apparatus extending between first and second landings, comprising:
  • an endless, flexible unit including a plurality of spaced axles
  • drive means driving said unit along a substantially fixed path which includes an upper load bearing run and a lower return run,
  • said platforms each including mounting means detachably connecting said platforms to different ones of said axles, said mounting means enabling a platform to be detached from, and reconnected to an axle, while the platform is located in the upper load bearing run of the flexible unit, without disassembly of the platform, adjacent platforms, or supporting structure,
  • said mounting means including fixed and movable portions, means for pivotally mounting said movable portion, said movable portion being pivotable between clamped and unclamped positions with respect to said fixed portion, said fixed portion being shaped and oriented to rest on a selected axle when its platform is placed on the load bearing run of said flexible unit, said movable portion being shaped and oriented when in the unclamped position to strike said selected axle and pivot into its clamped position about said axle as said fixed portion is placed thereon,
  • each of the platforms include an access opening therein, with the locking means being actuatable via said access opening.
  • each of the platforms is a step including a treadboard, with the access openings being in said treadboard.
  • the endless flexible unit includes first and second spaced belts formed of pivotally interconnected toothed links and the drive means is mounted between said first and second belts, and between the load bearing and return runs of the fixed path.
  • each of the platforms include an access opening therein
  • the mounting means includes clamping means which automatically clamps and locks onto an axle when the platform is placed in position on the endless, flexible unit, said clamping means being actuable to an unlocked condition via the access opening in the platform, permitting said clamping means to be unclamped to remove the platform from the endless, flexible unit.
  • each platform is a step having a treadway, and the access opening is in said treadway.
  • the locking means includes a cooperative screw and nut each carried by a different portion of the fixed and movable portions of the mounting means, said screw and nut being aligned for engagement when the fixed and movable portions are in the clamped position, and wherein each platform defines an access opening through which the screw and nut may be engaged and disengaged.
  • the locking means includes cooperative spring means and locking shoulder, each carried by a different portion of the fixed and movable portions of the mounting means, said spring means being actuated by the pivotal movement of the movable portion as it pivots to the clamped position, to releasably engage the locking shoulder and lock the fixed and movable portions in the clamped position, and wherein each platform defines an access opening through which the spring means may be disengaged from the locking shoulder.
  • Transportation apparatus extending between first and second landings, comprising:
  • an endless, flexible unit including a plurality of spaced axles
  • drive means driving said unit along a substantially fixed path which includes an upper load bearing run and a lower return run, a plurality of platforms, and mounting means detachably connecting each of said platforms to a different one of said axles,
  • said mounting means including clamping means having fixed and movable portions, means for pivotally mounting said movable portion, with said movable portion being operable between unclamped and clamped configurations, and locking means for locking said clamping means in the clamped configuration on a step axle,
  • said movable portion of the clamping means being pivotally fixed such that placing a step on a step axle causes the step axle to strike and pivot the movable portion of the clamping means into its clamped configuration on the step axle, said mounting means enabling a platform to be detached from, and reconnected to, its associated axle, while the platform is located in the upper load bearing run of the unit, without disassembly of the platform, adjacent platforms, or supporting structure.
  • the locking means includes a screw mounted on the fixed portion of the locking means and a nut on the movable portion, and including access openings in the platform aligned with said screw, for actuating saidlocking means.
US00283679A 1972-08-25 1972-08-25 Transportation device Expired - Lifetime US3789972A (en)

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US28367972A 1972-08-25 1972-08-25

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US00283679A Expired - Lifetime US3789972A (en) 1972-08-25 1972-08-25 Transportation device

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US (1) US3789972A (fr)
JP (1) JPS5425315B2 (fr)
BE (1) BE803868A (fr)
CA (1) CA949914A (fr)
DE (1) DE2342849C2 (fr)
ES (1) ES194156Y (fr)
GB (1) GB1384225A (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0169349A1 (fr) * 1984-07-17 1986-01-29 Inventio Ag Système de fixation des marches d'un escalier roulant
US5072821A (en) * 1990-12-07 1991-12-17 Otis Elevator Company Escalator/people mover bearing
US5219060A (en) * 1991-05-24 1993-06-15 Otis Elevator Company Step axle for escalator
US5351800A (en) * 1992-07-15 1994-10-04 Otis Elevator Company Escalator step axle attachment assembly
US5454166A (en) * 1993-03-12 1995-10-03 Noga Engineering Ltd. Deburring tool
US5894917A (en) * 1996-12-31 1999-04-20 Lg Industrial Systems Co., Ltd. Step combining system for escalator
US20040060800A1 (en) * 2001-05-25 2004-04-01 Uwe Hauer Step attachment on the step chain of an escalator
US20050000778A1 (en) * 2000-11-28 2005-01-06 Uwe Hauer Footboard element fastening for passenger conveyors
US20090026038A1 (en) * 2006-05-16 2009-01-29 Van Der Werf Gerben Escalator or travelator
US20120085618A1 (en) * 2009-07-20 2012-04-12 Otis Elevator Company Releasable step locking system
EP2240361B1 (fr) * 2007-11-12 2015-06-24 Peter A. Müller Plate-forme segmentée

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH618394A5 (fr) * 1977-05-25 1980-07-31 Inventio Ag
JPS5878984A (ja) * 1981-11-04 1983-05-12 三菱電機株式会社 乗客コンベヤの駆動装置
JPS58117466U (ja) * 1982-02-05 1983-08-10 三菱電機株式会社 マンコンベアの踏段取付装置
JPS6296079U (fr) * 1985-12-02 1987-06-19
DE19608169C1 (de) * 1996-03-04 1997-04-17 O & K Rolltreppen Gmbh Montageverfahren sowie Befestigungseinrichtung für die Stufen bzw. Paletten von Rolltreppen bzw. Rollsteigen
DE10236115B4 (de) * 2002-08-07 2005-09-15 Kone Corp. Stufensystem für eine Rolltreppe
DE10254318B4 (de) * 2002-11-21 2007-02-08 Kone Corp. Rolltreppe sowie Stufe für eine Rolltreppe
WO2019159312A1 (fr) * 2018-02-16 2019-08-22 三菱電機ビルテクノサービス株式会社 Marche d'escalier mécanique permettant une vérification visuelle d'un état fixe par rapport à l'arbre de pas
CN111741916B (zh) * 2018-03-07 2022-06-21 三菱电机大楼技术服务株式会社 带锁定机构的乘客输送机用梯级

Citations (5)

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US2033308A (en) * 1934-08-04 1936-03-10 Harold W Shonnard Step for moving stairways
US2214580A (en) * 1937-06-26 1940-09-10 Westinghouse Elec Elevator Co Moving stairway
US2570135A (en) * 1948-07-19 1951-10-02 Robert F Loughridge Moving stairway
US2981397A (en) * 1957-09-13 1961-04-25 Westinghouse Electric Corp Moving stairway
US3677388A (en) * 1970-11-23 1972-07-18 Westinghouse Electric Corp Modular drive unit for a conveyor

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Publication number Priority date Publication date Assignee Title
US2292534A (en) * 1941-09-04 1942-08-11 Otis Elevator Co Moving stairway step construction
JPS4727349U (fr) * 1971-04-15 1972-11-28

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2033308A (en) * 1934-08-04 1936-03-10 Harold W Shonnard Step for moving stairways
US2214580A (en) * 1937-06-26 1940-09-10 Westinghouse Elec Elevator Co Moving stairway
US2570135A (en) * 1948-07-19 1951-10-02 Robert F Loughridge Moving stairway
US2981397A (en) * 1957-09-13 1961-04-25 Westinghouse Electric Corp Moving stairway
US3677388A (en) * 1970-11-23 1972-07-18 Westinghouse Electric Corp Modular drive unit for a conveyor

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0169349A1 (fr) * 1984-07-17 1986-01-29 Inventio Ag Système de fixation des marches d'un escalier roulant
US5072821A (en) * 1990-12-07 1991-12-17 Otis Elevator Company Escalator/people mover bearing
EP0490591A2 (fr) * 1990-12-07 1992-06-17 Otis Elevator Company Palier pour escalier roulant/transporteur de personnes
EP0490591A3 (en) * 1990-12-07 1993-05-12 Otis Elevator Company Escalator/people mover bearing
US5219060A (en) * 1991-05-24 1993-06-15 Otis Elevator Company Step axle for escalator
US5351800A (en) * 1992-07-15 1994-10-04 Otis Elevator Company Escalator step axle attachment assembly
US5454166A (en) * 1993-03-12 1995-10-03 Noga Engineering Ltd. Deburring tool
US5894917A (en) * 1996-12-31 1999-04-20 Lg Industrial Systems Co., Ltd. Step combining system for escalator
US6868956B2 (en) * 2000-11-28 2005-03-22 Otis Elevator Company Footboard element fastening for passenger conveyors
US20050000778A1 (en) * 2000-11-28 2005-01-06 Uwe Hauer Footboard element fastening for passenger conveyors
US20040060800A1 (en) * 2001-05-25 2004-04-01 Uwe Hauer Step attachment on the step chain of an escalator
US7222713B2 (en) * 2001-05-25 2007-05-29 Otis Elevator Company Step attachment on the step chain of an escalator
US20090026038A1 (en) * 2006-05-16 2009-01-29 Van Der Werf Gerben Escalator or travelator
US7854311B2 (en) 2006-05-16 2010-12-21 Thyssenkrupp Fahrtreppen Gmbh Escalator or travelator
EP2240361B1 (fr) * 2007-11-12 2015-06-24 Peter A. Müller Plate-forme segmentée
US20120085618A1 (en) * 2009-07-20 2012-04-12 Otis Elevator Company Releasable step locking system

Also Published As

Publication number Publication date
JPS5425315B2 (fr) 1979-08-27
ES194156Y (es) 1975-05-16
BE803868A (fr) 1974-02-22
ES194156U (es) 1974-11-16
DE2342849A1 (de) 1974-03-07
GB1384225A (en) 1975-02-19
JPS4967382A (fr) 1974-06-29
CA949914A (en) 1974-06-25
DE2342849C2 (de) 1983-10-27

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