EP0372576B1 - A support structure for a linear motor drive type of elevator - Google Patents
A support structure for a linear motor drive type of elevator Download PDFInfo
- Publication number
- EP0372576B1 EP0372576B1 EP19890122702 EP89122702A EP0372576B1 EP 0372576 B1 EP0372576 B1 EP 0372576B1 EP 19890122702 EP19890122702 EP 19890122702 EP 89122702 A EP89122702 A EP 89122702A EP 0372576 B1 EP0372576 B1 EP 0372576B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- stator
- linear motor
- column
- elevator
- support structure
- 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
Links
- 230000033001 locomotion Effects 0.000 claims description 7
- 230000035939 shock Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Images
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
- B66B11/0045—Arrangement of driving gear, e.g. location or support in the hoistway
- B66B11/0055—Arrangement of driving gear, e.g. location or support in the hoistway on the counterweight
-
- 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
- B66B11/0407—Driving gear ; Details thereof, e.g. seals actuated by an electrical linear motor
Definitions
- the conventional traction type of elevator is widely used.
- This type of elevator utilizes a machine room which is provided above the lift, in which a traction machine is installed and whereon ropes are hung, on respective ends of which ropes a car and a counterweight are suspended.
- an elevator having a linear motor as its power source has been provided.
- the linear motor itself moves in a well known manner in a linear direction, and there is no need of a traction machine, reduction device, and traction sheaves; whereby the whole equipment is quite lightweight. A machine room for the traction machine is not necessary.
- the invention relates to an elevator of the linear motor drive type, the linear motor comprising a stator designed as the primary side or the secondary side of the linear motor and comprising a moving element designed as the other side of the linear motor, both ends of the stator being fastened to a building equipped with the elevator, the fastening means for one end of the stator comprising a spring.
- Such an elevator is known from the document EP-A-0 048 847.
- the stator of its linear motor is rigidly fastened to the building at its upper end and is connected to the building via a coil spring at its lower end.
- Stators provided for such elevators have a considerable length, depending on the height of the building where the elevator is to be installed. By earthquakes vibrations and shocks are transmitted to the stator, resulting in a risk of stator breakage.
- the elevator according to the invention is characterized in that the fastening means for the other end of the stator comprises a joint which allows relative pivoting movements of the stator in vertical planes; and that the spring is provided such that that it provides a pre-determined tension to the stator and absorbs vibrations acted on the stator.
- the way how the stator is fastened to the building allows the stator to vibrate and absorbs the vibration acted on the stator.
- the joint allows a swivelling motion of the stator within a certain range.
- the spring allows the stator to swing within a certain range. Since displacement of the stator is allowed by the movement of the joint and by the spring, vibrations are reduced and absorbed, so that the stator is protected from breakage.
- the linear motor of the elevator as shown consists of a hollow cylindrical moving element 1 and a column 10 as a stator.
- the cylindrical moving element 1 functions as a primary side.
- Counterweights 2 are installed in a casing consisting of a channel member to form as a whole a counterweight 3 for a car 4. This counterweight 3 is usually set in its weight as 1.5 times of the car 4.
- the car 4 and the counterweight 3 are connected by four ropes 6 through four sheaves 5 provided above.
- both the car and the counterweight have guide rails 7 and 8 respectively on both sides thereof and engage the guide rails via slide members 9 when going up and down.
- the column 10 of the stator side is made of aluminum alloy, which passes through the cylindrical moving element 1 at the middle portion between the guide rails 8 for the counterweight 3.
- the lower end portion of the column 10 is fastened through a support member 14 to a lower support frame 11 provided on the lower portion of the guide rails 8.
- the upper end portion of the column 10 is fastened through a support member 13 to the upper support consisting of a support channel 12.
- the desired length of column 10 in a elevator of 600 kg loading capacity is obtained practically by connecting a plurality of column sections having 1,500 mm length and 100 mm diameter each.
- a pre-determined gap has to be provided between the primary side and the secondary side, and in order to maintain the gap the moving element 1 is supported by rollers 15 provided on both the upper side and the lower side of the moving element 1 by four pieces. Further, considering the change of this gap due to vibrations, shocks to the linear motor or wearing of the rollers 15, gap sensors 16 are provided on the upper and lower portions of the casing frame 17.
- the linear motor is shown as being installed in the counterweight 3, but it is also possible to install the linear motor on the car 4.
- FIG. 2 shows the structure of the lower support member 14 for the column 10.
- a ball joint 105 as a coupling means having an eyebolt 101.
- an eyebolt 102 is fastened to the support frame 11 which is connected to the lower ends of the guide rails 8 at both sides of the linear motor.
- the column 10 is kept vertical by connecting the eyebolts 101 and 102 with a coil spring 103 and a turnbuckle 104, both of which have hooks on both ends thereof respectively.
- the turnbuckle 104 can add a specific tension to the column 10 by regulating the distance between the spring 103 and the joint 105. Further, the provision of the turnbuckle 104 allows for an easy regulation of the tension to the column 10 and for an easy assembly of the spring 103.
- the ball joint 105 has such a structure that it holds a ball 109 by a pair of yokes 106 which are connected to the eyebolt 101, and the ball 109 is kept therein by a pin 111 penetrating the pair of yokes 106 and the ball 109.
- the end of column 10 has a shaft 107 having a ring which accepts the ball. Accordingly, due to this construction, the yoke portion can rotate approximately 36° relative to the shaft 107; further, in the plane perpendicular to the above rotating plane, it can rotate within a certain angle.
- Fig. 3 shows the structure of the upper support member 13 of the column 10.
- the upper support structure although it is possible to connect the column 10 to the upper support channel 12 by using the same structure as the lower support structure, in this embodiment, because it is enough for either upper or lower support member to bear a spring to damp the vibration or the shock of the column, the upper support structure has merely a ball joint 110.
- This ball joint 110 can also rotate within a certain range, and functions to allow the displacement of the column 10 due to the vibration with the lower support member 14.
- the structure consisting of a ball joint 105 and coil spring 103 without a turnbuckle 104 is enough for effecting the functions thereof.
- Fig. 4 shows how to construct the column 10.
- the column 10 obtains its desired length, as mentioned above, by connecting a plurality of column sections.
- a connecting member 200 shown in Fig. 5 is used.
- This connecting member 200 has a structure machined integrally by a lathe with a flange 201 formed in the middle portion of it and both ends thereof being threaded 202.
- the end portions of the column sections to be connected are drilled and threaded, and counterbores 203 receive the flange 201.
- the threads in the drill holes can be manufactured easily with a lathe sufficiently concentrically.
- Figs 6 and 7 show a gap sensing system to detect the abnormality of the distance between the column 10 and the moving element 1 of the linear motor.
- the support mechanism consists of the rollers 15.
- rollers have the problem that the gap between the stator and the moving element 1 is changed due to the wearing of the surface of the rollers 15 by frequent up-down travelling of the elevator, breakage, or dropping out.
- gap sensors 16 are provided on both of the upper and lower sides of the linear motor.
- This gap sensor system consists of a hollow casing 300, a conductive strip 301, a conductive strip fastening screw 302, a regulator screw 303, and a detecting circuit 310.
- One end of the conductive strip 301 is fastened to the inner side of the casing 300 by the fastening screw 302 and the other end thereof sets a change of the allowable gap between the column 10 and the moving element 1 of the linear motor through the regulator screw 303.
- the fastening screw 302 and the column 10 are connected to a DC source through a lead wire 304 respectively.
- the conductive strip 301 is preferably installed at each of four positions of the quarter inner circumference of the casing 300, but it may be at three positions or a plurality of positions over five.
- the conductive strip may be ring shaped.
- a detecting circuit 310 has a structure as shown in Fig. 7.
- a conductive strip 301 of the gap sensors 16 provided on both of the upper and lower sides of the linear motor touches the surface of the column 10, whereby relay coils X1 and X2 are energized and contacts Y1 and Y2 which are normally open are closed. Because those relay coils and the contacts constitute a self holding circuit, the warning lamps I1 and I2 continue to light.
- a safety means may be provided, which reads the signal generated when the conductive strip 301 contacts the column 10 and operates the brake apparatus to stop the car 4.
- a support structure for a cylindrical type of linear motor particularly a support structure of the column of the stator side is described, but the structure according to the present invention is not limited to the application to the cylindrical type of linear motor, but is also applicable for instance to a support structure of a conductive plate of a plate type of linear motor.
- the stator functioning as the primary side or the secondary side of the linear motor is provided on a building by being mounted in a hoist-way of the elevator through coupling members allowing relative movement provided on the upper and the lower portions of the stator. If a shock or vibration was imparted to the stator, the movement of the stator itself is appropriately allowed, particularly the vibration etc is reduced or absorbed by the spring provided on the lower portion of the stator to protect the stator effectively from the damages such as breaking.
Landscapes
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Types And Forms Of Lifts (AREA)
- Linear Motors (AREA)
- Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
- Cage And Drive Apparatuses For Elevators (AREA)
Description
- The conventional traction type of elevator is widely used. This type of elevator utilizes a machine room which is provided above the lift, in which a traction machine is installed and whereon ropes are hung, on respective ends of which ropes a car and a counterweight are suspended.
- The dimension of this machine is relatively large, and at the same time in the machine room are installed a brake apparatus and other control apparatus. Thus the machine room occupies considerable space and has to be designed having the necessary structural strength.
- In order to avoid those problems, an elevator having a linear motor as its power source has been provided. The linear motor itself moves in a well known manner in a linear direction, and there is no need of a traction machine, reduction device, and traction sheaves; whereby the whole equipment is quite lightweight. A machine room for the traction machine is not necessary.
- The invention relates to an elevator of the linear motor drive type, the linear motor comprising a stator designed as the primary side or the secondary side of the linear motor and comprising a moving element designed as the other side of the linear motor, both ends of the stator being fastened to a building equipped with the elevator, the fastening means for one end of the stator comprising a spring.
- Such an elevator is known from the document EP-A-0 048 847. The stator of its linear motor is rigidly fastened to the building at its upper end and is connected to the building via a coil spring at its lower end.
- Stators provided for such elevators have a considerable length, depending on the height of the building where the elevator is to be installed. By earthquakes vibrations and shocks are transmitted to the stator, resulting in a risk of stator breakage.
- It is the problem underlying the invention to provide an elevator which is safer in regard of stator breakage.
- As a solution of this problem the elevator according to the invention is characterized in that the fastening means for the other end of the stator comprises a joint which allows relative pivoting movements of the stator in vertical planes; and that the spring is provided such that that it provides a pre-determined tension to the stator and absorbs vibrations acted on the stator.
- The way how the stator is fastened to the building allows the stator to vibrate and absorbs the vibration acted on the stator. The joint allows a swivelling motion of the stator within a certain range. The spring allows the stator to swing within a certain range. Since displacement of the stator is allowed by the movement of the joint and by the spring, vibrations are reduced and absorbed, so that the stator is protected from breakage.
- In the following, referring to the attached drawings, a preferred embodiment of the invention is elucidated
- Fig. 1
- is a schematic diagram of a linear motor drive type of elevator,
- Fig. 2
- shows the lower support structure for a column as a stator of a linear motor
- Fig. 3
- shows the upper support structure,
- Fig. 4
- shows how to connect columns partially in section,
- Fig. 5
- shows a perspective view showing a column connecting member,
- Fig. 6
- shows a sectional view of a gap sensor,
- Fig. 7
- shows a circuitry for the gap sensor.
- The linear motor of the elevator as shown consists of a hollow cylindrical moving element 1 and a
column 10 as a stator. The cylindrical moving element 1 functions as a primary side.Counterweights 2 are installed in a casing consisting of a channel member to form as a whole acounterweight 3 for a car 4. Thiscounterweight 3 is usually set in its weight as 1.5 times of the car 4. The car 4 and thecounterweight 3 are connected by fourropes 6 through four sheaves 5 provided above. Further, both the car and the counterweight have guide rails 7 and 8 respectively on both sides thereof and engage the guide rails via slide members 9 when going up and down. Thecolumn 10 of the stator side is made of aluminum alloy, which passes through the cylindrical moving element 1 at the middle portion between the guide rails 8 for thecounterweight 3. The lower end portion of thecolumn 10 is fastened through asupport member 14 to a lower support frame 11 provided on the lower portion of the guide rails 8. The upper end portion of thecolumn 10 is fastened through asupport member 13 to the upper support consisting of asupport channel 12. Incidentally, the desired length ofcolumn 10 in a elevator of 600 kg loading capacity, is obtained practically by connecting a plurality of column sections having 1,500 mm length and 100 mm diameter each. - In the cylindrical linear motor, as is well known, a pre-determined gap has to be provided between the primary side and the secondary side, and in order to maintain the gap the moving element 1 is supported by
rollers 15 provided on both the upper side and the lower side of the moving element 1 by four pieces. Further, considering the change of this gap due to vibrations, shocks to the linear motor or wearing of therollers 15,gap sensors 16 are provided on the upper and lower portions of thecasing frame 17. In Fig. 1, the linear motor is shown as being installed in thecounterweight 3, but it is also possible to install the linear motor on the car 4. - Next, Fig. 2 is explained. This figure shows the structure of the
lower support member 14 for thecolumn 10. On the free end of thelowest column section 100 there is mounted aball joint 105 as a coupling means having aneyebolt 101. On the floor aneyebolt 102 is fastened to the support frame 11 which is connected to the lower ends of the guide rails 8 at both sides of the linear motor. Thecolumn 10 is kept vertical by connecting theeyebolts coil spring 103 and aturnbuckle 104, both of which have hooks on both ends thereof respectively. Theturnbuckle 104 can add a specific tension to thecolumn 10 by regulating the distance between thespring 103 and thejoint 105. Further, the provision of theturnbuckle 104 allows for an easy regulation of the tension to thecolumn 10 and for an easy assembly of thespring 103. - The
ball joint 105 has such a structure that it holds aball 109 by a pair of yokes 106 which are connected to theeyebolt 101, and theball 109 is kept therein by a pin 111 penetrating the pair of yokes 106 and theball 109. On the other hand, the end ofcolumn 10 has ashaft 107 having a ring which accepts the ball. Accordingly, due to this construction, the yoke portion can rotate approximately 36° relative to theshaft 107; further, in the plane perpendicular to the above rotating plane, it can rotate within a certain angle. These structures will allow the column itself to vibrate within certain angles. - Fig. 3 shows the structure of the
upper support member 13 of thecolumn 10. As to the upper support structure, although it is possible to connect thecolumn 10 to theupper support channel 12 by using the same structure as the lower support structure, in this embodiment, because it is enough for either upper or lower support member to bear a spring to damp the vibration or the shock of the column, the upper support structure has merely aball joint 110. Thisball joint 110 can also rotate within a certain range, and functions to allow the displacement of thecolumn 10 due to the vibration with thelower support member 14. - Therefore, according to the support structure of the
column 10 mentioned above, even if the vibration and shock acted on thecolumn 10, it is possible to protect thecolumn 10 effectively. Moreover, in the lower support structure ofcolumn 10, the structure consisting of aball joint 105 andcoil spring 103 without aturnbuckle 104 is enough for effecting the functions thereof. - Fig. 4 shows how to construct the
column 10. Thecolumn 10 obtains its desired length, as mentioned above, by connecting a plurality of column sections. - In this kind of linear motor, because of the requirement of precise linearity along the whole length of the
column 10, it is an issue how to connect the column sections. Practically it is needed to connect two column sections in such a manner that surface steps between the column are not more than 0.1 mm. - Therefore, a connecting
member 200 shown in Fig. 5 is used. This connectingmember 200 has a structure machined integrally by a lathe with aflange 201 formed in the middle portion of it and both ends thereof being threaded 202. On the other hand, the end portions of the column sections to be connected are drilled and threaded, andcounterbores 203 receive theflange 201. The threads in the drill holes can be manufactured easily with a lathe sufficiently concentrically. - Accordingly, it is possible to connect the column sections in such a manner that the allowable linearity of the
whole column 10 is satisfied by screwing one male screw portion of the above connectingmember 200 into a female screw threaded on one end of a column section, the other male screw portion of the connectingmember 200 being screwed into the female screw of the other column section. - Figs 6 and 7 show a gap sensing system to detect the abnormality of the distance between the
column 10 and the moving element 1 of the linear motor. - As mentioned above, normally in a linear motor, it is necessary to provide a certain gap between the stator and the moving element, and in order to maintain this gap a support mechanism becomes necessary.
- Thus, as shown in Fig. 1, in this embodiment the support mechanism consists of the
rollers 15. - However, these rollers have the problem that the gap between the stator and the moving element 1 is changed due to the wearing of the surface of the
rollers 15 by frequent up-down travelling of the elevator, breakage, or dropping out. - To detect abnormal changes of the gap,
gap sensors 16 are provided on both of the upper and lower sides of the linear motor. - This gap sensor system consists of a
hollow casing 300, aconductive strip 301, a conductivestrip fastening screw 302, aregulator screw 303, and a detectingcircuit 310. One end of theconductive strip 301 is fastened to the inner side of thecasing 300 by thefastening screw 302 and the other end thereof sets a change of the allowable gap between thecolumn 10 and the moving element 1 of the linear motor through theregulator screw 303. - Further, the
fastening screw 302 and thecolumn 10 are connected to a DC source through alead wire 304 respectively. Theconductive strip 301 is preferably installed at each of four positions of the quarter inner circumference of thecasing 300, but it may be at three positions or a plurality of positions over five. - Furthermore, the conductive strip may be ring shaped.
- A detecting
circuit 310 has a structure as shown in Fig. 7. - As mentioned above, if a change is generated in the gap due to wearing of the
rollers 15, aconductive strip 301 of thegap sensors 16 provided on both of the upper and lower sides of the linear motor touches the surface of thecolumn 10, whereby relay coils X₁ and X₂ are energized and contacts Y₁ and Y₂ which are normally open are closed. Because those relay coils and the contacts constitute a self holding circuit, the warning lamps I₁ and I₂ continue to light. - Further, a safety means may be provided, which reads the signal generated when the
conductive strip 301 contacts thecolumn 10 and operates the brake apparatus to stop the car 4. - In the above described embodiment, a support structure for a cylindrical type of linear motor, particularly a support structure of the column of the stator side is described, but the structure according to the present invention is not limited to the application to the cylindrical type of linear motor, but is also applicable for instance to a support structure of a conductive plate of a plate type of linear motor.
- According to the present invention, the stator functioning as the primary side or the secondary side of the linear motor is provided on a building by being mounted in a hoist-way of the elevator through coupling members allowing relative movement provided on the upper and the lower portions of the stator. If a shock or vibration was imparted to the stator, the movement of the stator itself is appropriately allowed, particularly the vibration etc is reduced or absorbed by the spring provided on the lower portion of the stator to protect the stator effectively from the damages such as breaking.
Claims (3)
- Elevator of the linear motor drive type, the linear motor comprising a stator (10) designed as the primary side or the secondary side of the linear motor and comprising a moving element (1) designed as the other side of the linear motor, both ends of the stator (10) being fastened to a building equipped with the elevator, the fastening means (14) for one end of the stator (10) comprising a spring (103),
characterized in that
the fastening means (110) for the other end of the stator (10) comprises a joint which allows relative pivoting movements of the stator (10) in vertical planes; and that the spring (103) is provided such that it provides a predetermined tension to the stator (10) and absorbs vibrations acted on the stator (10). - Elevator as defined in claim 1,
characterized in that
the fastening means (114) for the one end of the stator (10) comprises a joint (105) which allows relative pivoting movements of the stator (10) in vertical planes. - Elevator as defined in claim 1 or 2,
characterized in that
the fastening means (114) for the one end of the stator (10) comprises a turn buckle (104).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63311539A JPH0825702B2 (en) | 1988-12-09 | 1988-12-09 | Support structure for elevator guide rails |
JP311539/88 | 1988-12-09 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0372576A1 EP0372576A1 (en) | 1990-06-13 |
EP0372576B1 true EP0372576B1 (en) | 1995-03-22 |
Family
ID=18018453
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19890122702 Expired - Lifetime EP0372576B1 (en) | 1988-12-09 | 1989-12-08 | A support structure for a linear motor drive type of elevator |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0372576B1 (en) |
JP (1) | JPH0825702B2 (en) |
DE (1) | DE68921853T2 (en) |
ES (1) | ES2072886T3 (en) |
FI (1) | FI895865A0 (en) |
HK (1) | HK83495A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103953145A (en) * | 2014-04-21 | 2014-07-30 | 苏州市时代工程咨询设计管理有限公司 | Semi-frame sightseeing lift panorama glass curtain wall system |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02241353A (en) * | 1989-02-28 | 1990-09-26 | Otis Elevator Co | Air gap adjuster for cylindrical linear motor |
FR2666702B1 (en) * | 1990-09-10 | 1995-08-25 | Shinko Metal Prod | PLATED METAL COLUMN FOR LINEAR MOTOR AND METHOD FOR MANUFACTURING THE SAME. |
JP2603889B2 (en) * | 1991-12-04 | 1997-04-23 | 三菱電機株式会社 | Guide rails for linear motor driven elevators |
KR960008646Y1 (en) * | 1993-08-06 | 1996-10-07 | 엘지산전 주식회사 | Linear motor driving type elevator motor supporting device |
JP4577333B2 (en) * | 2007-07-09 | 2010-11-10 | 株式会社日立製作所 | Traction elevator |
DE102010042144A1 (en) * | 2010-10-07 | 2012-04-12 | Thyssenkrupp Transrapid Gmbh | elevator system |
JP5858751B2 (en) * | 2011-11-28 | 2016-02-10 | 東芝エレベータ株式会社 | Elevator guide rail support structure |
JP6222864B1 (en) * | 2016-05-25 | 2017-11-01 | 東芝エレベータ株式会社 | Elevator buffer equipment |
KR102009254B1 (en) * | 2017-10-30 | 2019-08-09 | 한국기계연구원 | Smart Cart with Low Vibration for Plant Maintenance |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3641832A (en) * | 1969-03-26 | 1972-02-15 | Hitachi Ltd | A worm-gear-type speed reduction device for an elevator |
US4012654A (en) * | 1971-12-24 | 1977-03-15 | Bbc Brown Boveri & Company Limited | Single-phase synchronous machine |
FR2491045A1 (en) * | 1980-09-30 | 1982-04-02 | Otis Elevator Co | AUTOMOTIVE ELEVATOR USING AS A COUNTERWEIGHT A LINEAR ELECTRIC MOTOR |
JPS5964490A (en) * | 1982-10-04 | 1984-04-12 | 三菱電機株式会社 | Hoisting device for elevator |
DE3422374A1 (en) * | 1984-06-15 | 1985-12-19 | Kurt-Erich 8000 München Heidenreich | Lift |
JPS62175394A (en) * | 1986-01-29 | 1987-08-01 | フジテツク株式会社 | Guide rail supporter for elevator |
-
1988
- 1988-12-09 JP JP63311539A patent/JPH0825702B2/en not_active Expired - Lifetime
-
1989
- 1989-12-08 EP EP19890122702 patent/EP0372576B1/en not_active Expired - Lifetime
- 1989-12-08 DE DE1989621853 patent/DE68921853T2/en not_active Expired - Fee Related
- 1989-12-08 ES ES89122702T patent/ES2072886T3/en not_active Expired - Lifetime
- 1989-12-08 FI FI895865A patent/FI895865A0/en not_active Application Discontinuation
-
1995
- 1995-05-25 HK HK83495A patent/HK83495A/en not_active IP Right Cessation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103953145A (en) * | 2014-04-21 | 2014-07-30 | 苏州市时代工程咨询设计管理有限公司 | Semi-frame sightseeing lift panorama glass curtain wall system |
Also Published As
Publication number | Publication date |
---|---|
DE68921853D1 (en) | 1995-04-27 |
JPH02158586A (en) | 1990-06-19 |
FI895865A0 (en) | 1989-12-08 |
EP0372576A1 (en) | 1990-06-13 |
DE68921853T2 (en) | 1995-09-07 |
ES2072886T3 (en) | 1995-08-01 |
HK83495A (en) | 1995-06-01 |
JPH0825702B2 (en) | 1996-03-13 |
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