US3666075A - Moving-handrail device in moving stairways and the like - Google Patents

Moving-handrail device in moving stairways and the like Download PDF

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Publication number
US3666075A
US3666075A US104109A US3666075DA US3666075A US 3666075 A US3666075 A US 3666075A US 104109 A US104109 A US 104109A US 3666075D A US3666075D A US 3666075DA US 3666075 A US3666075 A US 3666075A
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US
United States
Prior art keywords
handrail
moving
friction
drive wheels
wheels
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Expired - Lifetime
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US104109A
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English (en)
Inventor
Tetjo Iwata
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.)
Toshiba Corp
Original Assignee
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP703816A external-priority patent/JPS5035719B1/ja
Priority claimed from JP12135070U external-priority patent/JPS4835907Y1/ja
Priority claimed from JP12134970U external-priority patent/JPS4835906Y1/ja
Application filed by Tokyo Shibaura Electric Co Ltd filed Critical Tokyo Shibaura Electric Co Ltd
Application granted granted Critical
Publication of US3666075A publication Critical patent/US3666075A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B23/00—Component parts of escalators or moving walkways
    • B66B23/02—Driving gear
    • B66B23/04—Driving gear for handrails

Definitions

  • FIG. 1 A first figure.
  • This invention relates generally to flexible belt-like structures and driving means therefor. More particularly, the invention relates to a new and advanced moving-handrail device in moving stairways (or escalators), moving sidewalks (or moving walkways), and like apparatuses, the handrail device being especially suitable for such apparatus of the so-called transparent balustrade type.
  • the handrail-driving mechanism is installed within the so-called truss or machine frame below the floor or stairway level and not in the end parts where the direction of travel of the handrail is reversed, the driving mechanism being of friction drive type.
  • the handrail driving force tends to decrease because of stretching of the moving handrail due to changes therein with the passage of time and the resulting changes in the wraparound angles of the handrail and the frictional force thereof.
  • the common practice known heretofore has been to correct the relationship between the wraparound angles and frictional force by means such as weights and tension pulleys.
  • an object of the invention to provide a moving handrail device in which the handrail is clamped firmly between and driven positively by two groups of wheels, one group being that of friction-drive wheels.
  • Another object of the invention is to provide, in the above described moving handrail device, a cam mechanism operating in reaction to increasing driving force imparted to the handrail, i.e., increasing load on the handrail, to cause the two groups of wheels to grip the handrail with increasing force thereby to prevent slippage and loss of driving force and power due to elongation of the moving handrail.
  • a moving-handrail device comprising a moving handrail adapted to travel partly along a guide rail in the balustrade structure and partly in the frame therebelow, motive power means, and a driving mechanism disposed in the frame and operated by the motive power means to drive the moving handrail at its return span in the frame, the driving mechanism comprising, essentially, two floating carriages, friction-drive wheels rotatably mounted in a row on one of the carriages and driven by the motive power means, idler wheels rotatably mounted in a row on the other carriage in positions confronting respective friction-drive wheels with the moving handrail interposed and clamped therebetween, and a cam mechanism operating in reaction to increasing driving force imparted to the handrail to cause the friction-drive wheels and idler wheels to grip the handrail with increasing force.
  • FIG. 1 is a fragmentary side elevation showing the upper part of an escalator in which an example of a handrail device according to the invention is installed;
  • FIG. 2 is an enlarged side elevation of one part of the moving handrail device shown in FIG. 1;
  • FIG. 3 is a simplified side view for the purpose of describing the operation of the device shown in FIG. 2;
  • FIG. 4 is a fragmentary, diagrammatic side view for the purpose of describing force relationships at the time of operation when the moving handrail is driven in the direction opposite to that indicated in FIG. 3;
  • FIG. 5 is a fragmentary side elevation, similar to FIG. 1, showing another example of the moving handrail device according to the invention
  • FIG. 6 is an enlarged side view showing one part of the handrail device shown in FIG. 5;
  • FIG. 7 is a diagrammatic side view indicating force relationships in the device illustrated in FIG. 5 when the device is operating in one driving direction;
  • FIG. 8 is a diagrammatic side view indicating force relationships in the same device operating in the opposite driving direction
  • FIG. 9 is a side view showing another example, which is a modification of the device shown in FIG. 6, of the invention.
  • FIG. 10 is a fragmentary side elevation, similar to FIG. 1, illustrating still another example of the invention.
  • FIG. 11 is an enlarged side view showing one part of the moving handrail device shown in FIG. 10;
  • FIG. 12 is a sectional view taken in the plane indicated by line XII-XII in FIG. 11 as viewed in the arrow direction;
  • FIG. 13 is a sectional view taken in the plane indicated by line XIIIXIII in FIG. 11 as viewed in the arrow direction.
  • reference numeral 1 designates a support frame of known type of an escalator.
  • the support frame 1 comprises an upper horizontal extension (shown), a lower horizontal extension (not shown) and a sloping intermediate extension or truss 2 partly shown in FIG. 1.
  • Above and along the support frame there are disposed a pair of balustrades 4 having struts 3, one of the balustrades being shown in FIG. 1.
  • Each of the balustrades 4 has a guide rail 4a disposed along the outer edge of the balustrade and an endless moving handrail travels along the guide rail 4a.
  • the lower or return run of the hand belt 5 passes through the interior space of the truss 2.
  • a pair of opposing upper and lower guide bases 6 and 7 which are rigidly secured to the truss 2.
  • the inner surface of the upper guide base 6 is provided with cam surfaces 6a formed as shown in FIG. 2.
  • a pair of floating carriages 8 and 9 are interposed between the guide bases 6 and .7. These floating carriages 8 and 9 are coupled to each other by means of pins 10 fixed to the carriage 8 and slots 11 in the carriage 9, the pins 10 slidably engaging respective slots 11. It will be noted that the carriages 8 and 9 are movable toward and away from each other in a direction transverse to the run of the moving handrail 5 passing through the truss 2.
  • a series of friction-drive wheels 12a, 12b, 12c, and 12d are rotatably supported on shafts 13a, 13b, 13c, and 13d, respectively, which are in turn mounted on the carriage 8 and support sprockets 14a, 14b, 14c, and 14d the shafts being parallel and spaced apart and being alined transversely relative to the handrail.
  • These sprockets 14a, 14b, 14c, and 14d are adapted to be driven in the same direction through chains 15 drivingly connecting adjacent pairs of the sprockets. All of the frictiondrive wheels 12a, 12b, 12c, and 12d are in contact with one surface of the handrail 5.
  • the floating carriage 9 has a series of idler wheels 16a, 16b, 16c, and 16d rotatably supported by parallel and spaced apart support shafts 17a, 17b, 17c, and 17d, respectively, which are also aligned transversely. These idler wheels 16a, 16b, 16c, and 16d are in opposing or confronting relation to the frictiondrive wheels 12a, 12b, 12c, and 12d, respectively, and cooperate with the latter to grip the handrail 5 therebetween.
  • the floating carriage 9 also has a pair of guide rollers 9a and 9b which roll on the surface of the guide base 7 for guiding the carriage 9 along the base 7. It is to be noted that there are slight clearances between the guide base 7 and the idler wheels 16a, 16b, 16c, and 16d.
  • a motor 19 is provided in the horizontal extension of the support frame 1, and is coupled to a speed-reduction device 20, the output shaft 20a of which is drivingly coupled to a pulley 22 through a belt 21.
  • a sprocket 23 has a shaft common to that of the pulley 22 and is, therefore, driven by the pulley 22.
  • An endless chain 24 is passed around the sprocket 23 and a sprocket (not shown) coaxial with the sprocket 14a.
  • the moving handrail device of the above described organization operates in the following manner. It will be apparent that when the motor 19 is operated, the sprocket 14a is also driven at a reduced speed through the above mentioned power transmission mechanism, and the other sprockets 14b, 14c. and 14d are also driven in the same direction through the chains 15.
  • FIG. 3 showing a simplified construction of the driving mechanism shown in FIG. 2, the mechanical relationship between the cam surfaces 6a and the follower rollers 18 will now be explained.
  • the driving force P is also increased or decreased, respectively.
  • the driving force P become greater, the follower rollers 18 are displaced leftward and downward as viewed in FIG. 3 to press the friction-drive wheels against the surface of the handrail 5 with increased forces and vice versa. Therefore, the hand belt driving mechanism according to the invention imparts suitable gripping forces to the handrail in proportion to the driving force P This prevents undue stress in the hand belt and ensures prolonged life of the belt.
  • the angle 6 formed between the surface of the guide base 6 and the surface of the cam 60 should be selected so as to provide the best operating condition of the handrail driving mechanism.
  • FIG. 4 illustrates the relation between the follower roller and the cam in the case Where the handrail 5 is driven in reverse direction. It will be apparent that when the belt 5 is reversely driven, each follower roller 18 engages the opposite face ofthe cam 6a.
  • FIG. 5 through 8, inclusive, show another example of the invention.
  • the same reference numerals as are used in FIGS. 1 and 2 designate the same or corresponding members and parts.
  • the truss 2 is again provided with a pair of parallel guide bases 6 and 7. It is to be noted, however, that the base 6 is located at a lower position and the base 7 is located at an upper position.
  • the lower base 6 has an upper edge formed with a pair of the notch-shaped cams 6a.
  • the carriage 8 supports a series of friction-drive wheels 112a, 112b, l12c, and 112d, which. are rotatable about support shafts l13a,113b, 113C, and 113d carried by the carriage 8.
  • the support shafts 1 13a, 1 13b, 113C, and 113d also support sprockets 114a, 114b, 114e, and 114d.
  • the adjacent sprockets 114a and 114b, and 1140 and 114d are drivingly coupled to each other through endless chains 115 and adapted to be driven in the same direction. All of the friction-drive wheels 112a, 112b, 1120, and 112d engage the upper surface of the handrail 5.
  • the carriage 9 supports a series of support shafts 117a, 117b, 117s, and 117d on which a series of idler wheels 116a, 116b, 1160, and 116d are rotatably mounted, respectively. These idler wheels are in opposed relation to respective friction-drive wheels and cooperate with the latter to grip the hand belt 5 therebetween.
  • the carriage 8 On the outer edge of the carriage 8 there are rotatably mounted guide rollers 118C and 118d which roll on the surface of the guide base 7. Furthermore, the carriage 9 is provided with follower rollers 1 18a and 118b rotatably mounted on the outer edge of the carriage 9. These follower rollers 118a and ll8b are in engagement with the cam surfaces 6a. It is to be noted that there are slight clearances between the surface of the guide base 6 and the peripheral surfaces of the idler rollers 116a, 116b, 116a, and 116d. Because ofthe engagement of the follower rollers 118a and 1 18b with the cam 6a, the carriages 8 and 9 are prevented from moving downward along the length of the inclined truss 2.
  • Sprockets 119a and 119b are rigidly mounted on the support shafts 113b and 113C and an endless intermediate transmission chain 120 is passed around both the sprockets 119a and 11912 and around guide rollers 121a, 121b, 121C, and 121d and the sprocket 23.
  • the sprocket 23 is driven by power from the motor 19 as in the case of FIGS. 1 and 2.
  • the motor 19 is operated to drive the sprocket 23 which, in turn, drives the sprockets 119a and 1 19b through the chain 120.
  • all of the friction-drive wheels 112a, 112b, 1120, and 112d are turned to drive the handrail 5, cooperating with the associated idler rollers 116a, 116b, 1160, and 116d.
  • FIGS.7 and 8 The operative relationship between the cams 6a and the follower rollers 118a and l18b is identical to that explained with reference to FIGS. 1 through 4 is indicated in FIGS.7 and 8.
  • the cam 6a and the roller 118b are shown in inverted positions for the purpose of comparison with FIG. 3. It will be apparent that the operation of the handrail driving mechanism shown in FIGS. 5 and 6 is almost identical to that of the handrail driving mechanism shown in FIGS. 1 and 2.
  • FIG. 9 illustrates a modification of the driving mechanism shown in FIG. 6.
  • the mechanism shown in FIG. 9 differs from that shown in FIG. 6 in that the friction-drive wheels 1 12a and 112d and the cooperating idler rollers 116a and 116d are omitted to make the structure smaller.
  • the handrail driving mechanisms shown in FIGS. 5 through 9 are advantageous in that, because the angular extent of the intermediate transmission chain 120 around each of the sprockets 119a and 1I9b is reduced as compared with the angular extent of the chain 24 around the sprocket on the support shaft 13a, the curving extent of the chain 120 is made smaller, so that excessive curving of the chain 120 can be avoided.
  • Another advantageous feature is that the transmission of force from the chain 120 to the friction-drive wheels is reliable since the chain 120 passes around two sprockets 119a and ll9b.
  • FIGS. through 13, inclusive there is illustrated a further example of the invention.
  • the same reference numerals as are used in FIGS. 5 and 6 designate the same or like members and parts.
  • pins 210 on a floating carriage 8 are in engagement with slots 21 1 cut in a floating carriage 9 so as to allow relative movement of the carriages 8 and 9 toward and away from each other.
  • the carriage 8 supports support shafts 213a, 213b, 213a, 213d, and 213a on which friction-drive wheels 212a, 212b, 212e, 212d, and 2122 are rotatable.
  • the support shafts also carry thereon a series of sprockets 214a, 2140, 214d, and
  • Idler wheels 216a, 216b, 2166, 216d, and 216e are rotatably mounted on the floating carriage 9 cooperate with the friction-drive wheels 2120, 212:; to grip the handrail belt 5 therebetween.
  • the carriage 9 has a pair of cam follower rollers 218a and 21812 which cooperate with cam surfaces 6a of the guide base 6 in the same manner as described hereinbefore with reference to FIGS. 1 through 9.
  • the carriage 8 has mounted thereon a pair of guide rollers 2180 and 218d which engage the surface of the guide base 7.
  • the sprocket 23 When the motor 19 is operated, the sprocket 23 is rotated and drives the sprockets 214a, 214b, 214e in unison via the chain 220, whereby the friction-drive wheels 212a, 212b, 2l2e are driven and cooperate with the idler wheels 216a, 216b, 216e to advance the handrail 5.
  • the relation of the cams 6a and the follower rollers 218a and 218b is exactly the same as that described hereinbefore.
  • the handrail driving mechanism shown in FIGS. 10 through 13 is advantageous in that a more powerful and reliable drive of the friction-drive wheels can be obtained since a single chain 220 passes around all of the sprockets for the frictiondrive wheels in a zig-zag fashion.
  • a movinghandrail device comprising a moving handrail of flexible beltlike form adapted to travel longitudinally partly along the guide rail and partly in the frame structure, motive-power means for supplying power to drive the moving handrail, and a driving mechanism disposed in the frame structure and operated by said power to impart traveling motion to the moving handrail, said driving mechanism comprising:
  • first and second guide members fixed to the frame structure on respectively opposite sides of and spaced apart from the moving handrail;
  • one of said guide members having at least one cam surface
  • coupling means for coupling the first and second floating carriages in a manner to permit relative movement thereof toward and away from each other;
  • a moving-handrail device in which the cam surface is a triangular cutout formed in an edge part of the guide member.
  • a moving-handrail device in which the follower member is a follower roller rotatably supported on the first floating carriage.
  • a moving-handrail device in which at least two guide rollers are rollably interposed between the second floating carriage and the guide member for guiding the same.
  • a moving-handrail device in which the coupling means comprises at least one slot formed in one of the floating carriages and at least one pin fixed to the other floating carriage and slidably engaged with the slot.
  • a moving-handrail device in which the motive power means comprises a prime mover producing said power, a driving chain for transmitting said power to a central shaft of one of the friction-drive wheels, and other driving chains for transmitting power from said shaft to similar shafts of other friction-drive wheels successively from one wheel to the adjacently next wheel.
  • a moving-handrail device in which the motive power means comprises a prime mover producing said power, a driving chain for transmitting said power to central shafts of one pair of adjacent wheels among the frictiondrive wheels and other driving chains for coupling said pair of adjacent wheels to adjacent other friction-drive wheels.
  • the motive power means comprises a prime mover, idler wheels each interposed between and apart from each pair of adjacent friction-drive wheels, and a driving chain for coupling the prime mover and all friction-drive wheels, said chain being passed around a driving wheel of the prime mover and alternately around sprockets on all friction-drive wheels and the idler wheels in succession in a zig-zag path.

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  • Escalators And Moving Walkways (AREA)
US104109A 1970-01-16 1971-01-05 Moving-handrail device in moving stairways and the like Expired - Lifetime US3666075A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP703816A JPS5035719B1 (enrdf_load_stackoverflow) 1970-01-16 1970-01-16
JP12135070U JPS4835907Y1 (enrdf_load_stackoverflow) 1970-12-05 1970-12-05
JP12134970U JPS4835906Y1 (enrdf_load_stackoverflow) 1970-12-05 1970-12-05

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GB (1) GB1304821A (enrdf_load_stackoverflow)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4200177A (en) * 1976-10-13 1980-04-29 Hitachi, Ltd. Driving mechanism for driving moving handrail
US4589539A (en) * 1983-09-15 1986-05-20 Westinghouse Electric Corp. Transportation apparatus having a moving handrail
US4901839A (en) * 1989-02-28 1990-02-20 Otis Elevator Company Self adjustable escalator handrail drive
US4998613A (en) * 1989-02-28 1991-03-12 Otis Elevator Company Self adjustable escalator handrail drive
US5018616A (en) * 1990-11-05 1991-05-28 Otis Elevator Company Balanced self adjustable escalator handrail drive
US5062520A (en) * 1990-07-11 1991-11-05 Otis Elevator Company Self adjustable handrail drive with separate drive chains
US5133443A (en) * 1991-03-15 1992-07-28 Otis Elevator Company Self adjustable escalator handrail drive with balanced drive chain tension
EP0530946A1 (en) * 1991-09-03 1993-03-10 Montgomery Elevator Company Handrail drive mechanism for a passenger conveyor
EP0531940A1 (en) * 1991-09-09 1993-03-17 Otis Elevator Company Moving handrail drive
US5427221A (en) * 1994-05-12 1995-06-27 Home Elevators, Inc. Escalator handrail drive system
US5638937A (en) * 1995-01-13 1997-06-17 Inventio Ag Handrail drive system conversion
US20050180833A1 (en) * 2002-03-13 2005-08-18 Preben Almind Transport container for wind turbine blades
CN1318288C (zh) * 2000-09-26 2007-05-30 奥蒂斯电梯公司 自动扶梯驱动机构
US20080296125A1 (en) * 2007-06-01 2008-12-04 Kone Corporation Load sharing handrail drive apparatus
WO2014142891A1 (en) 2013-03-14 2014-09-18 Otis Elevator Company Self-clamping handrail drive
CN107001005A (zh) * 2014-11-28 2017-08-01 因温特奥股份公司 用于自动扶梯或移动步道的扶手驱动装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1086930A (en) * 1966-04-13 1967-10-11 Waggonfabrik Jos Rathgeber A G Improvements in escalators
US3414109A (en) * 1965-12-02 1968-12-03 Westinghouse Electric Corp Transportation devices having movable handrails

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3414109A (en) * 1965-12-02 1968-12-03 Westinghouse Electric Corp Transportation devices having movable handrails
GB1086930A (en) * 1966-04-13 1967-10-11 Waggonfabrik Jos Rathgeber A G Improvements in escalators

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4200177A (en) * 1976-10-13 1980-04-29 Hitachi, Ltd. Driving mechanism for driving moving handrail
US4589539A (en) * 1983-09-15 1986-05-20 Westinghouse Electric Corp. Transportation apparatus having a moving handrail
US4901839A (en) * 1989-02-28 1990-02-20 Otis Elevator Company Self adjustable escalator handrail drive
EP0385276A3 (en) * 1989-02-28 1990-09-26 Otis Elevator Company Self adjustable escalator handrail drive
US4998613A (en) * 1989-02-28 1991-03-12 Otis Elevator Company Self adjustable escalator handrail drive
US5062520A (en) * 1990-07-11 1991-11-05 Otis Elevator Company Self adjustable handrail drive with separate drive chains
EP0466666A3 (en) * 1990-07-11 1992-05-27 Otis Elevator Company Self adjustable handrail drive with separate drive chains
US5018616A (en) * 1990-11-05 1991-05-28 Otis Elevator Company Balanced self adjustable escalator handrail drive
US5133443A (en) * 1991-03-15 1992-07-28 Otis Elevator Company Self adjustable escalator handrail drive with balanced drive chain tension
EP0503152A1 (en) * 1991-03-15 1992-09-16 Otis Elevator Company Self-adjustable escalator handrail drive with balanced drive chain tension
EP0530946A1 (en) * 1991-09-03 1993-03-10 Montgomery Elevator Company Handrail drive mechanism for a passenger conveyor
EP0531940A1 (en) * 1991-09-09 1993-03-17 Otis Elevator Company Moving handrail drive
US5427221A (en) * 1994-05-12 1995-06-27 Home Elevators, Inc. Escalator handrail drive system
US5522492A (en) * 1994-05-12 1996-06-04 Home Elevators Escalator handrail drive system
US5638937A (en) * 1995-01-13 1997-06-17 Inventio Ag Handrail drive system conversion
CN1318288C (zh) * 2000-09-26 2007-05-30 奥蒂斯电梯公司 自动扶梯驱动机构
US20050180833A1 (en) * 2002-03-13 2005-08-18 Preben Almind Transport container for wind turbine blades
CN101679006B (zh) * 2007-06-01 2012-03-14 通力股份公司 负载均分扶手驱动设备
WO2008150455A2 (en) 2007-06-01 2008-12-11 Kone Corporation Load sharing handrail drive apparatus
WO2008150455A3 (en) * 2007-06-01 2009-03-12 Kone Corp Load sharing handrail drive apparatus
US7954619B2 (en) 2007-06-01 2011-06-07 Kone Corporation Load sharing handrail drive apparatus
US20080296125A1 (en) * 2007-06-01 2008-12-04 Kone Corporation Load sharing handrail drive apparatus
WO2014142891A1 (en) 2013-03-14 2014-09-18 Otis Elevator Company Self-clamping handrail drive
EP2969879A4 (en) * 2013-03-14 2016-11-16 Otis Elevator Co SELF-CLOSED HAND-DRIVE DRIVE
US9556005B2 (en) 2013-03-14 2017-01-31 Otis Elevator Company Self-clamping handrail drive
CN107001005A (zh) * 2014-11-28 2017-08-01 因温特奥股份公司 用于自动扶梯或移动步道的扶手驱动装置
US10017361B2 (en) * 2014-11-28 2018-07-10 Inventio Ag Handrail drive for an escalator or a moving walkway
CN107001005B (zh) * 2014-11-28 2018-12-04 因温特奥股份公司 用于自动扶梯或移动步道的扶手驱动装置

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