CA1200212A - Elevator drive apparatus with vibration isolation means - Google Patents
Elevator drive apparatus with vibration isolation meansInfo
- Publication number
- CA1200212A CA1200212A CA000432569A CA432569A CA1200212A CA 1200212 A CA1200212 A CA 1200212A CA 000432569 A CA000432569 A CA 000432569A CA 432569 A CA432569 A CA 432569A CA 1200212 A CA1200212 A CA 1200212A
- Authority
- CA
- Canada
- Prior art keywords
- drive apparatus
- drive
- traction sheave
- resilient
- motor
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
- B66B11/0035—Arrangement of driving gear, e.g. location or support
- B66B11/004—Arrangement of driving gear, e.g. location or support in the machine room
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
- B66B11/04—Driving gear ; Details thereof, e.g. seals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
- B66B11/04—Driving gear ; Details thereof, e.g. seals
- B66B11/043—Driving gear ; Details thereof, e.g. seals actuated by rotating motor; Details, e.g. ventilation
-
- 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
- B66D1/28—Other constructional details
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Cage And Drive Apparatuses For Elevators (AREA)
- Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
An elevator drive apparatus comprising a motor and reduction gear unit resiliently mounted on a first support member via vibration isolators, and a traction sheave rotatably mounted on a second support member via a bed member and vibration isolators. An output shaft of the reduction gear unit is connected to the sheave by an elastic coupling. The vibration isolators and the elastic coupling isolate vibrations generated by the engagement between the teeth of the reduction gears and by the pulsating rotation of the drive motor and reducing such vibrations from the sheave, which improves the ride comfort in the elevator cage.
An elevator drive apparatus comprising a motor and reduction gear unit resiliently mounted on a first support member via vibration isolators, and a traction sheave rotatably mounted on a second support member via a bed member and vibration isolators. An output shaft of the reduction gear unit is connected to the sheave by an elastic coupling. The vibration isolators and the elastic coupling isolate vibrations generated by the engagement between the teeth of the reduction gears and by the pulsating rotation of the drive motor and reducing such vibrations from the sheave, which improves the ride comfort in the elevator cage.
Description
æ
BACKGROUND OF THE INVENTION
The present invention reiates -to a drive apparatus for a traction elevator lifting a cage up and down with cables.
An apparatus having reduction gears driven by a mo-tor and a trac-tion sheave connec-ted to a rotatable output shaft of the reduction gears is known for driving elevators. The apparatus drives a cage and a counter weight with cables wound over the traction sheave. In such an apparatus the vibrations generated by the engayement be-tween the teeth of the reduction gears travels through the cables to the cage, whereby passengexs in the cage feel uncomfortable.
An elevator system employing reduction gears with parallel axis helical gears and a variable-voltage-variable-frequency controlled (W VFC) AC motor has also been introduced.
Such an elevator system has the advantages of saving energy because of less power loss wi-th the parallel axis reduction gears, and because the AC motor is smaller than a DC motor, strong and reliable since there are no brushes, and less costly and easy to maintain. The parallel axis gears, however, generate a greater vibration when the teeth are engagedj and W VFC drives xipple the AC motor by the current distortion which an inverter generates during modula-tion.
These vibrations are transmitted via the traction cables to the passenger cage.
,~, ~,j, .~ ,~.
-- 2 ~
ln Japanese laid-open pa-tent application No. 90381/
1982 published on June 5, 1982, an elevator apparatus has a motor resiliently supported in a motor housing wh;ch pre-vents vibra-tion -from the motor from travelling -to o-ther parts oF the system, e.g. reduction gears and support members.
In this apparatus, however, the vibra-tions from the reduc-tion gears are directly transmitted -to the traction sheave and travel through the cables -to the cage, which results in deteriorated ride conditions. Fur-thermore, since vibration generated by the brake is also transmitted to the sheave, it is not suFficient in suppressing vibration -to only consider countermeasures For the motor.
The apparatus according to this invention over-comes the above-mentioned disadvan-tages, and comprises drive means having a motor and reduction gears vibroisolatedly rnounted on support means, a traction sheave vibroisolatedly mounted on the support means, and an elas-tic coupling bet-ween a shaft o-F the sheave and an output shaft of the drive means, whereby vibrations from -the drive means are absorbed by the elastic coupling and vibrationally cushioned mount-ings, and are thus isolated from the sheave.
Thus, according to -the present invention there is provided a drive apparatus for an elevator including an electric drive motor, reduction gears driven by the motor, and a traction sheave driven by the reduction gears, said apparatus being installed in a machine room proximate a hoistway of an elevator cage, and comprising: a) support means disposed in the machine room; b) drive means including the motor and the reduction gears; c) a plurali-ty of spaced first resilient means disposed between said drive means and said support means for absorbing vibrations generated by the mesh of the reduction gears and pulsa-ting rotations of the motor; d) -trac-tion sheave means wound with cables connected to the cage; e) a plurality oF spaced second ~ 3 L~
resilient means d-isposed be-tween said -traction sheave rneans and said support means for absorbing vibrations generated by or transmit-ted to the traction sheave means; and (f) elastic torque transmission means including a res-ilient coupling member disposed between said drive means and said trac-tion sheave means -For minimizing vibration transmissions thereto From the drive means, whereby the ride com-Fort level in -the elevator cage is improved. Suitably the sheave means includes a bed member moun-ted on said second resilient means, said bed member mounting a -traction sheave. Desirably the support means includes a first pair of spaced parallel beams and a first support mernber comprising a second pair o-f spaced parallel beams disposed on and perpendicular to said -First pair oF beams and wherein said first resilient vibration absorbing means are disposed on said second pair o-F beams, said drive means being attached to said First resilient vibration absorbing means. Preferably said suppor-t means further includes a second support rnember comprising a third pair of spaced parallel beams disposed on and perpendicular to said First pair of beams, said second resilient vibra-tion absorbing means being disposed on said third pair of beams and wherein said traction sheave means includes a bed member disposed on said second resilient vibration absorbing means, a traction sheave being supported on said bed member.
The present inven-tion will be further illustrated by way of the accompanying drawings, in which:-Fig. 1 is a vertical sectional view of an elevator drive apparatus according to the invention;
Fig. 2 is a plan view partly in sec-tion of a reduc-tion gear mechanism for the drive appara-tus;
Fig. 3 is a vertical sectional view taken on line III-III of Fig. l;
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Fig. 4 ls an enlarged sectional view of an elas-tic coupling oF the invention; and Fig. 5 is a plan view of an alternate elastic coupling.
In Figs. 1-4 re-ference numeral 1 designates an elevator shaft or hoistway, 2 a machine room disposed above the hoistway, 2a a floor of the machine room, 3 a pair of base members vertically upstanding from the floor, 4 a first support member comprising two beams extending across -the base members 3, 5 a drive appara-tus comprising reduction gears, an elec-tric motor and a brake described more fully below and mounted on -the first support member 4 via rubber vibration isolating pads 6, 7 a reduction gear box having helical gears 7a as shown in F-iy. 2, an input shaft 7b and - 4a -7~
an output shaft 7c, 8 an AC mo-tor connected to the input shaft 7b, and 9 a magnetic brake attached to the motor for braking the drive apparatus when necessary. A second support member 10 comprises two parallel beams extending across -the base members 3 separate from the first support member 4, reference numeral 11 designates a bed member moun-ted on -the second support member via vibration isolating pads 12, 13 is a traction sheave mounted on a shaft 13a whose ends are rotatably journaled in bearing stands 14 on the bed member 11, and lS
is an elastic coupling connecting the shafts 13a and 7c. As shown in Fig. 4/ the coupling has flanges 15a individually attached to the shaf-ts 13a and 7c and a circular or toroidal rubber member 15b connecting the flanges together in a compact manner. Reference numeral 16 designates a deflection sheave rotatably supported on the bottom surface of the bed member 11, 17 designa~es a plurality of hoist cables reeved over the traction and deflection sheaves and extending down into the hoistway, 18 is an elevator cage hung at one end of the cables, 18a is a cage sling connected to the cables, 18b is a passenger enclosure of the cage supported on the sling via resilient rubbers 18c, and 19 is a counter weight hung at the other end of the cables.
In the above structure, by reason of the traction sheave 13 being rotatably supported on the bed member 11 attached to the second support member 10 via the vibration isolating pads 12, the support member 10 heing separate from the first support member 4 mounting the drive apparatus 5, and the traction sheave being connected to the output shaft 7c of the drive apparatus via the elas-tic coupling 15, any vlbra-tions generated by the mesh of the reduction gears and by the pulsating rotation of the motor 8 under WVFC are absorbed by the coupling 15, which greatly reduces the vibration level of the trac-tion sheave 13.
Considering vertical vibrations generated by the reduction gears and the drive motor, because of the isolating rubbers 6 and 12 these vibrations are prevented from travelling to the sheave 13 through the path including the drive apparatus 5, the first support member 4, the base member 3, the second support member 10, and the bed member 11. The vibration of the traction sheave 13 is -thus substantlally reduced, and attendantly the transmission of vibrations from the drive apparatus to the cage 18 via the ropes 17 is greatly attenuated, improving the comfort level in the cage.
In the above embodiment the elastic coupling 15 includes a toroidal member 15b. As an alternative, an elastic belt 15c as shown in ~ig. 4 may be employed as -the force transmission member. The belt is reeved over two pulleys attached to the shafts 13a and 7c, and operates in the same manner as described above.
~ t~
In -the embodimen-t shown in Figs. 1-3, since both the traction sheave 13 and the deflection sheave 16 are rotatably supported on the same bed member 11, the horizontal force between the sheaves 13 and 16 is never applied to the rubbers 12, whereby the structure for lsolating vibration is simple and can be inexpensively manufacturecl. Furthermore, since the drive apparatus 5 and the sheave 13 are vibration isolated from the building, vibration and noise are not genera-ted in the rooms of the building and do not degrade the working environment.
With isolating rubbers 6 disposed between the first support member 4 and the drive apparatus 5, the amplitude of any vibrations generated is minimized. That is, if the rubbers were disposed between the first support member 4 and the base member 3, the first support member would also vibrate relative to the base member and reinforce the vibrations of the drive apparatus. The same analysis applies to isolating rubbers 12 by reason of their being mounted between the second support member 10 and bed member 11 instead of between the second support member and base members 3.
Since the deflection sheave 16 is suppor-ted on the bed member 11 via the isolating rubbers 12, the vibrations from the reduction gears and the drive mo-tor are isolated from the deflecti.on sheave, which further reduces any vibrations trans-mitted to the cage 18 -thxough the deflection sheave and the æ
cables 17. The isolating rubbers 12 suppress vibrations to both the -traction sheave 13 and the deflection sheave 16, whereby the cleflection sheave does not require an independen-t rubber mounting and the quantity of par-ts can be reduced.
BACKGROUND OF THE INVENTION
The present invention reiates -to a drive apparatus for a traction elevator lifting a cage up and down with cables.
An apparatus having reduction gears driven by a mo-tor and a trac-tion sheave connec-ted to a rotatable output shaft of the reduction gears is known for driving elevators. The apparatus drives a cage and a counter weight with cables wound over the traction sheave. In such an apparatus the vibrations generated by the engayement be-tween the teeth of the reduction gears travels through the cables to the cage, whereby passengexs in the cage feel uncomfortable.
An elevator system employing reduction gears with parallel axis helical gears and a variable-voltage-variable-frequency controlled (W VFC) AC motor has also been introduced.
Such an elevator system has the advantages of saving energy because of less power loss wi-th the parallel axis reduction gears, and because the AC motor is smaller than a DC motor, strong and reliable since there are no brushes, and less costly and easy to maintain. The parallel axis gears, however, generate a greater vibration when the teeth are engagedj and W VFC drives xipple the AC motor by the current distortion which an inverter generates during modula-tion.
These vibrations are transmitted via the traction cables to the passenger cage.
,~, ~,j, .~ ,~.
-- 2 ~
ln Japanese laid-open pa-tent application No. 90381/
1982 published on June 5, 1982, an elevator apparatus has a motor resiliently supported in a motor housing wh;ch pre-vents vibra-tion -from the motor from travelling -to o-ther parts oF the system, e.g. reduction gears and support members.
In this apparatus, however, the vibra-tions from the reduc-tion gears are directly transmitted -to the traction sheave and travel through the cables -to the cage, which results in deteriorated ride conditions. Fur-thermore, since vibration generated by the brake is also transmitted to the sheave, it is not suFficient in suppressing vibration -to only consider countermeasures For the motor.
The apparatus according to this invention over-comes the above-mentioned disadvan-tages, and comprises drive means having a motor and reduction gears vibroisolatedly rnounted on support means, a traction sheave vibroisolatedly mounted on the support means, and an elas-tic coupling bet-ween a shaft o-F the sheave and an output shaft of the drive means, whereby vibrations from -the drive means are absorbed by the elastic coupling and vibrationally cushioned mount-ings, and are thus isolated from the sheave.
Thus, according to -the present invention there is provided a drive apparatus for an elevator including an electric drive motor, reduction gears driven by the motor, and a traction sheave driven by the reduction gears, said apparatus being installed in a machine room proximate a hoistway of an elevator cage, and comprising: a) support means disposed in the machine room; b) drive means including the motor and the reduction gears; c) a plurali-ty of spaced first resilient means disposed between said drive means and said support means for absorbing vibrations generated by the mesh of the reduction gears and pulsa-ting rotations of the motor; d) -trac-tion sheave means wound with cables connected to the cage; e) a plurality oF spaced second ~ 3 L~
resilient means d-isposed be-tween said -traction sheave rneans and said support means for absorbing vibrations generated by or transmit-ted to the traction sheave means; and (f) elastic torque transmission means including a res-ilient coupling member disposed between said drive means and said trac-tion sheave means -For minimizing vibration transmissions thereto From the drive means, whereby the ride com-Fort level in -the elevator cage is improved. Suitably the sheave means includes a bed member moun-ted on said second resilient means, said bed member mounting a -traction sheave. Desirably the support means includes a first pair of spaced parallel beams and a first support mernber comprising a second pair o-f spaced parallel beams disposed on and perpendicular to said -First pair oF beams and wherein said first resilient vibration absorbing means are disposed on said second pair o-F beams, said drive means being attached to said First resilient vibration absorbing means. Preferably said suppor-t means further includes a second support rnember comprising a third pair of spaced parallel beams disposed on and perpendicular to said First pair of beams, said second resilient vibra-tion absorbing means being disposed on said third pair of beams and wherein said traction sheave means includes a bed member disposed on said second resilient vibration absorbing means, a traction sheave being supported on said bed member.
The present inven-tion will be further illustrated by way of the accompanying drawings, in which:-Fig. 1 is a vertical sectional view of an elevator drive apparatus according to the invention;
Fig. 2 is a plan view partly in sec-tion of a reduc-tion gear mechanism for the drive appara-tus;
Fig. 3 is a vertical sectional view taken on line III-III of Fig. l;
3,~'bd''D"~
...~L~IJ~ h~
Fig. 4 ls an enlarged sectional view of an elas-tic coupling oF the invention; and Fig. 5 is a plan view of an alternate elastic coupling.
In Figs. 1-4 re-ference numeral 1 designates an elevator shaft or hoistway, 2 a machine room disposed above the hoistway, 2a a floor of the machine room, 3 a pair of base members vertically upstanding from the floor, 4 a first support member comprising two beams extending across -the base members 3, 5 a drive appara-tus comprising reduction gears, an elec-tric motor and a brake described more fully below and mounted on -the first support member 4 via rubber vibration isolating pads 6, 7 a reduction gear box having helical gears 7a as shown in F-iy. 2, an input shaft 7b and - 4a -7~
an output shaft 7c, 8 an AC mo-tor connected to the input shaft 7b, and 9 a magnetic brake attached to the motor for braking the drive apparatus when necessary. A second support member 10 comprises two parallel beams extending across -the base members 3 separate from the first support member 4, reference numeral 11 designates a bed member moun-ted on -the second support member via vibration isolating pads 12, 13 is a traction sheave mounted on a shaft 13a whose ends are rotatably journaled in bearing stands 14 on the bed member 11, and lS
is an elastic coupling connecting the shafts 13a and 7c. As shown in Fig. 4/ the coupling has flanges 15a individually attached to the shaf-ts 13a and 7c and a circular or toroidal rubber member 15b connecting the flanges together in a compact manner. Reference numeral 16 designates a deflection sheave rotatably supported on the bottom surface of the bed member 11, 17 designa~es a plurality of hoist cables reeved over the traction and deflection sheaves and extending down into the hoistway, 18 is an elevator cage hung at one end of the cables, 18a is a cage sling connected to the cables, 18b is a passenger enclosure of the cage supported on the sling via resilient rubbers 18c, and 19 is a counter weight hung at the other end of the cables.
In the above structure, by reason of the traction sheave 13 being rotatably supported on the bed member 11 attached to the second support member 10 via the vibration isolating pads 12, the support member 10 heing separate from the first support member 4 mounting the drive apparatus 5, and the traction sheave being connected to the output shaft 7c of the drive apparatus via the elas-tic coupling 15, any vlbra-tions generated by the mesh of the reduction gears and by the pulsating rotation of the motor 8 under WVFC are absorbed by the coupling 15, which greatly reduces the vibration level of the trac-tion sheave 13.
Considering vertical vibrations generated by the reduction gears and the drive motor, because of the isolating rubbers 6 and 12 these vibrations are prevented from travelling to the sheave 13 through the path including the drive apparatus 5, the first support member 4, the base member 3, the second support member 10, and the bed member 11. The vibration of the traction sheave 13 is -thus substantlally reduced, and attendantly the transmission of vibrations from the drive apparatus to the cage 18 via the ropes 17 is greatly attenuated, improving the comfort level in the cage.
In the above embodiment the elastic coupling 15 includes a toroidal member 15b. As an alternative, an elastic belt 15c as shown in ~ig. 4 may be employed as -the force transmission member. The belt is reeved over two pulleys attached to the shafts 13a and 7c, and operates in the same manner as described above.
~ t~
In -the embodimen-t shown in Figs. 1-3, since both the traction sheave 13 and the deflection sheave 16 are rotatably supported on the same bed member 11, the horizontal force between the sheaves 13 and 16 is never applied to the rubbers 12, whereby the structure for lsolating vibration is simple and can be inexpensively manufacturecl. Furthermore, since the drive apparatus 5 and the sheave 13 are vibration isolated from the building, vibration and noise are not genera-ted in the rooms of the building and do not degrade the working environment.
With isolating rubbers 6 disposed between the first support member 4 and the drive apparatus 5, the amplitude of any vibrations generated is minimized. That is, if the rubbers were disposed between the first support member 4 and the base member 3, the first support member would also vibrate relative to the base member and reinforce the vibrations of the drive apparatus. The same analysis applies to isolating rubbers 12 by reason of their being mounted between the second support member 10 and bed member 11 instead of between the second support member and base members 3.
Since the deflection sheave 16 is suppor-ted on the bed member 11 via the isolating rubbers 12, the vibrations from the reduction gears and the drive mo-tor are isolated from the deflecti.on sheave, which further reduces any vibrations trans-mitted to the cage 18 -thxough the deflection sheave and the æ
cables 17. The isolating rubbers 12 suppress vibrations to both the -traction sheave 13 and the deflection sheave 16, whereby the cleflection sheave does not require an independen-t rubber mounting and the quantity of par-ts can be reduced.
Claims (12)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A drive apparatus for an elevator including an electric drive motor, reduction gears driven by the motor and a traction sheave driven by the reduction gears, said apparatus being installed in a machine room proximate a hoistway of an elevator cage and comprising: a) support means disposed in the machine room; b) drive means includ-ing the motor and the reduction gears; c) a plurality of spaced first resilient means disposed between said drive means and said support means for absorbing vibrations genera-ted by the mesh of the reduction gears and pulsating rota-tions of the motor; d) traction sheave means wound with cables connected to the cage; e) a plurality of spaced second resilient means disposed between said traction sheave means and said support means for absorbing vibrations genera-ted by or transmitted to the traction sheave means; and (f) elastic torque transmission means including a resilient coupling member disposed between said drive means and said traction sheave means for minimizing vibration transmissions thereto from the drive means, whereby the ride comfort level in the elevator cage is improved.
2. A drive apparatus as claimed in claim 1, where-in said reduction gears are helically cut.
3. A drive apparatus as claimed in claim 1, where-in the motor is a variable-voltage, variable-frequency con-trolled AC motor.
4. A drive apparatus as claimed in claim 1, where-in said traction sheave means includes a bed member mounted on said second resilient means, said bed member mounting a traction sheave.
5. A drive apparatus as claimed in claim 4, including a deflection sheave wound with the cables, said deflection sheave together with said traction sheave being mounted on said bed member.
6. A drive apparatus as claimed in claim 1, where-in said support means includes a first pair of spaced paral-lel beams and a first support member comprising a second pair of spaced parallel beams disposed on and perpendicular to said first pair of beams and wherein said first resilient vibration absorbing means are disposed on said second pair of beams, said drive means being attached to said first resilient vibration absorbing means.
7. A drive apparatus as claimed in claim 6, where-in said support means further includes a second support mem-ber comprising a third pair of spaced parallel beams dis-posed on and perpendicular to said first pair of beams, said second resilient vibration absorbing means being dis-posed on said third pair of beams and wherein said traction sheave means includes a bed member disposed on said second resilient vibration absorbing means, a traction sheave being supported on said bed member.
8. A drive apparatus as claimed in claim 1, where-in said drive means includes brake means.
9. A drive apparatus as claimed in claim 1, where-in said elastic transmission means comprises a circular resilient connector having side surfaces individually con-nected to a rotative shaft of said traction sheave means and an output shaft of said drive means.
10. A drive apparatus as claimed in claim 9, where-in said circular resilient connector is hollow and has holes communicating with the hollow at central portions of each side surface, said connector being coupled to said shafts via respective flanges individually fixed to the shafts and to peripheral portions of the holes.
11. A drive apparatus as claimed in claim 10, wherein said connector is a hollow toroidal ring having a peripneral wall shaped into a half circle in radial section, and is bidirectionally deformable along the axes of the shafts and the side surfaces of the connector.
12. A drive apparatus for an elevator as claimed in claim 10, wherein the diameter of said circular connector is greater than that of the flanges.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57143801A JPS5936089A (en) | 1982-08-19 | 1982-08-19 | Drive for elevator |
| JP143801/1982 | 1982-08-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1200212A true CA1200212A (en) | 1986-02-04 |
Family
ID=15347289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000432569A Expired CA1200212A (en) | 1982-08-19 | 1983-07-15 | Elevator drive apparatus with vibration isolation means |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPS5936089A (en) |
| KR (1) | KR840005703A (en) |
| CA (1) | CA1200212A (en) |
| GB (1) | GB2125362B (en) |
| HK (1) | HK84486A (en) |
| MY (1) | MY8700113A (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI76541C (en) * | 1986-12-23 | 1988-11-10 | Kone Oy | Lifting Machinery |
| IT1253037B (en) * | 1991-09-24 | 1995-07-10 | Alberto Sassi | WINCH FOR LIFTS WITH PERFECTED SUPPORT |
| AUPO108996A0 (en) * | 1996-07-17 | 1996-08-08 | G.P. Embelton & Co. Pty. Ltd. | Vibration isolation device |
| DE29924747U1 (en) * | 1998-02-26 | 2005-06-09 | Otis Elevator Co., Farmington | Elevator system with drive motor between elevator car and elevator shaft side wall |
| US7874404B1 (en) | 1998-09-29 | 2011-01-25 | Otis Elevator Company | Elevator system having drive motor located between elevator car and hoistway sidewall |
| JP4131764B2 (en) * | 1998-09-01 | 2008-08-13 | 東芝エレベータ株式会社 | Elevator equipment |
| ATE514221T1 (en) * | 2006-04-24 | 2011-07-15 | Inventio Ag | ACCESS DRIVE FOR AN ELEVATOR |
| JP5250521B2 (en) * | 2009-09-30 | 2013-07-31 | 株式会社日立製作所 | Elevator counterweight and elevator device using the same |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50103046A (en) * | 1974-01-26 | 1975-08-14 |
-
1982
- 1982-08-19 JP JP57143801A patent/JPS5936089A/en active Pending
-
1983
- 1983-04-02 KR KR1019830001369A patent/KR840005703A/en not_active Application Discontinuation
- 1983-07-15 CA CA000432569A patent/CA1200212A/en not_active Expired
- 1983-08-19 GB GB08322337A patent/GB2125362B/en not_active Expired
-
1986
- 1986-11-06 HK HK844/86A patent/HK84486A/en unknown
-
1987
- 1987-12-30 MY MY113/87A patent/MY8700113A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| KR840005703A (en) | 1984-11-16 |
| GB2125362B (en) | 1985-07-24 |
| GB2125362A (en) | 1984-03-07 |
| HK84486A (en) | 1986-11-14 |
| JPS5936089A (en) | 1984-02-28 |
| MY8700113A (en) | 1987-12-31 |
| GB8322337D0 (en) | 1983-09-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |