EP1538122A1 - Device for securing cage of elevator - Google Patents
Device for securing cage of elevator Download PDFInfo
- Publication number
- EP1538122A1 EP1538122A1 EP02765552A EP02765552A EP1538122A1 EP 1538122 A1 EP1538122 A1 EP 1538122A1 EP 02765552 A EP02765552 A EP 02765552A EP 02765552 A EP02765552 A EP 02765552A EP 1538122 A1 EP1538122 A1 EP 1538122A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- car
- counterweight
- advancing
- elevator
- rope
- 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.)
- Granted
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/0043—Devices enhancing safety during maintenance
- B66B5/005—Safety of maintenance personnel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
-
- 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
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B17/00—Hoistway equipment
- B66B17/34—Safe lift clips; Keps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/16—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
Definitions
- the present invention relates to a self-propelled elevator in which a driving machine for causing a car and a counterweight to ascend and descend is mounted on the counterweight.
- the invention relates to an elevator car fixing device that fixes the car with respect to the counterweight in an elevator in which an operator gets on top of the car to perform maintenance operation on the driving machine.
- Fig. 16 is a perspective view of a conventional self-propelled elevator as proposed, for example, in JP 9-124259 A.
- Fig. 17 is a diagram schematically illustrating this elevator apparatus.
- a car 2 and a counterweight 3 are arranged inside a hoistway of the elevator.
- the car 2 and the counterweight 3 ascend and descend within the hoistway while being guided by car-side guide rails 4 and counterweight-side guide rails 5 with a T-shaped sectional configuration, respectively.
- the counterweight 3 is mounted on the counterweight 3 with a driving machine 7 for driving a rope 6 wrapped around it.
- the counterweight 3 is further equipped with a brake device 31 that holds the side surfaces of a flange protruding in the outer periphery of a sheave of the driving machine 7 by a spring pressure to effect braking.
- a car-side rope fixing member 10 for fixing the portion of the rope 6 on the car 2 side and a weight-side rope fixing member 11 for fixing the portion of the rope 6 on the counterweight 3 side.
- an elevator control device 35 Installed at a predetermined position in a lower portion of the hoistway is an elevator control device 35 including a drive inverter for the driving machine 7 mounted on the counterweight 3.
- an elevator cable 32 Suspended inside the hoistway is an elevator cable 32 containing a power line for driving the driving machine 7 mounted on the counterweight 3, a brake drive line, a speed feedback encoder line for detecting speed and position, etc.
- the elevator cable 32 is suspended between the control device 35 and the driving machine 7 by way of a building-side junction point 33 and a junction point 34 under the car 2.
- the car 2 is suspended from the portion of the rope 6 between the car-side rope fixing member 10 and a return pulley 8.
- the car 2 is suspended by wrapping the rope 6 around a sash pulley 9 rotatably supported on a side surface of the car.
- the counterweight 3 is suspended from the portion of the rope 6 between the counterweight-side rope fixing member 11 and the return pulley 8.
- the counterweight 3 is suspended by wrapping the rope 6 around the sheave of the driving machine 7.
- the elevator thus constructed, that is, in the so-called self-propelled elevator in which the driving machine 7 for causing the car 2 to ascend and descend is mounted on the counterweight 3, the operator gets on top of the car 2, and the car 2 is moved to a position where maintenance of the driving machine 7 is possible, that is, to the position where the car 2 passes the counterweight 3, the operator reaching out from the car 2 to inspect the driving machine 7.
- a car fixing device for fixing the car to a stationary portion in the hoistway, such as a guide rail, as a device for mechanically preventing inadvertent movement of the car 2 during maintenance operation when the maintenance operation is thus to be performed on the driving machine 7 by reaching out from the top of the car 2.
- Fig. 18 is a perspective view of a conventional car fixing device as disclosed, for example, in JP 2000-203774 A.
- an operating mechanism 50 having a lock bar 41 adapted to longitudinally advance and retreat and a bracket 42 for securing this lock bar 41 at a predetermined position.
- the lock bar 41 has an operating lever 43 protruding from a side surface portion thereof.
- the present invention has been made with a view toward solving the above problem in the prior art. It is an object of the present invention to provide an elevator car fixing device in which the car and the counterweight are fixed in position in a state they are connected together, so that the device is free from the influence of the expansion of the rope with age, making it possible to fix the position of the driving machine with respect to the car fixing position.
- an elevator car fixing device which is provided in an elevator, the elevator including: a rope arranged in a hoistway and wrapped around a return pulley arranged in an upper portion of the hoistway; a car suspended from one end of the rope; and a counterweight suspended from a portion of the rope between a counterweight-side rope fixing member, which is provided in the upper portion of the hoistway and to which the other end of the rope is fixed, and the return pulley, the counterweight being adapted to ascend when the car descends and to descend when the car ascends and equipped with a driving machine for causing the car to ascend and descend, the elevator car fixing device including an advancing/retreating member provided on one of the car and the counterweight and adapted to move toward and away from the other of the car and the counterweight, and a locking mechanism provided on the other of the car and the counterweight and adapted to be engaged with the advancing/retreating member when the advancing/retreating member advances to thereby lock the car and the counterweight
- any inadvertent motion of the car during the operation is mechanically inhibited, making it possible to perform the operation in a stable manner and with ease.
- the device is free from the influence of the expansion of the rope with age, making it possible to fix the position of the driving machine with respect to the car fixing position.
- Fig. 1 is a perspective view of an elevator, showing an elevator car fixing device according to Embodiment 1 of the present invention. Further, Fig. 2 is a diagram showing how an operator works on top of the car of the elevator of Fig. 1. Fig. 3 is a schematic diagram schematically showing the elevator of this embodiment. Fig. 4 is a schematic diagram illustrating how the operator performs maintenance operation, with the car and a counterweight being connected together.
- a car 2 and a counterweight 3 are arranged in a hoistway 1 of the elevator.
- the car 2 and the counterweight 3 ascend and descend inside the hoistway 1 while being guided by car-side guide rails 4 and weight-side guide rails 5 with a T-shaped sectional configuration, respectively.
- the counterweight 3 has a weight frame 3b formed by connecting together four frame members with a U-shaped section into a rectangular configuration, and a plurality of weights 3a accommodated in the weight frame 3b in different numbers for adjustment in weight.
- mounted on the counterweight 3 is a driving machine 7 for causing the car 2 and the counterweight 3 to ascend and descend.
- the counterweight 3 is equipped with a brake device, which is not shown here.
- a return pulley 8 is provided in the upper portion of the hoistway 1.
- a rope 6 is wrapped around the return pulley 8, and dangles in the hoistway 1.
- One end portion of the rope 6 dangles first, and is then turned upwards to be fixed to a car-side rope fixing member 10 provided in the upper portion of the hoistway 1.
- the other end portion of the rope 6 dangles first, and is then turned upwards to be fixed to a counterweight-side rope fixing member 11 provided in the upper portion of the hoistway 1.
- the car 2 is suspended from the portion of the rope 6 between the car-side rope fixing member 10 and the return pulley 8. In suspending the car 2, the rope 6 is wrapped around a sash pulley 9 provided under the car.
- the counterweight 3 is suspended from the portion of the rope 6 between the counterweight-side rope fixing member 11 and the return pulley 8. In suspending the counterweight 3, the rope 6 is wrapped around a sheave 7a of the driving machine 7.
- a connecting device 12 for connecting the car 2 and the counterweight 3 with each other in the ascent/descent direction.
- a control device 35 for operating the elevator In the lower portion of the hoistway 1, there is installed a control device 35 for operating the elevator. As in the prior art, between the control device 35 and the driving machine 7, there is provided an elevator cable, which is not shown here.
- Fig. 5 is a diagram for illustrating the connecting device of this embodiment.
- Fig. 6 is a diagram showing the connecting device in the connecting state.
- the connecting device 12 has a lock bar 13 provided on the car 2 and serving as an advancing/retreating member 13 adapted to move toward and away from the counterweight 3, and a lock hole 3c which is provided in the counterweight 3 and into which the forward end portion of the lock bar 13 is inserted when the lock bar 13 advances.
- the lock hole 3c is formed in a weight frame 3b.
- the height of the lock hole 3c is determined such that, when the car 2 and the counterweight 3 are connected together, the driving machine 7 attains a height which facilitates the inspection thereof.
- the weight frame 3b is engaged with the lock bar 13 to constitute a locking mechanism for locking the car 2 and the counterweight 3 with respect to each other in the ascent/descent direction.
- the lock bar 13 is slidably supported by a bracket 14 serving as a guide member provided on the car frame 2a. Two side surfaces of the bracket 14 have through-holes 14a. The lock bar 13 is passed through these two through-holes 14a, and is supported so as to be capable of moving toward and away from the counterweight 3.
- An operating lever 13a protrudes from the outer peripheral surface of the lock bar 13. This operating lever 13a is engaged with a U-shaped guide slit 14b formed in the bracket 14, and regulates the movement of the lock bar 13.
- the lock bar 13a is engaged with a lateral groove at the advance end of the guide slit 14b, the lock bar 13 is secured in the connecting position.
- the operating lever 13a is engaged with a lateral groove at the retreat end of the guide slit 14b, the lock bar 13 is secured in the retreat position.
- the operator When the car 2 and the counterweight 3 are to be connected together, the operator performs positioning on the car 2 and the counterweight 3.
- the operating lever 13a When the position has been reached where the positioning on the car 2 and the counterweight 3 is complete, the operating lever 13a is removed from the lateral groove at the retreat position, and the lock bar 13 is caused to advance, and inserted into the lock hole 3c, with the operating lever 13a being fixed to the lateral groove at the connecting position.
- the car 2 and the counterweight 3 are mutually regulated in their movement in the ascent/descent direction.
- the elevator car fixing device constructed as described above, is provided in an elevator having: the rope 6 wrapped around the return pulley 8 and arranged in the hoistway 1, with the return pulley 8 being arranged in the upper portion of the elevator hoistway; the car 2 suspended from one end of the rope 6; and the counterweight 3 suspended from the portion of the rope 6 between the counterweight-side rope fixing member 11 in the upper portion of the hoistway 1, to which the other end of the rope 6 is fixed, and the return pulley 8, the counterweight 3 being adapted to ascend when the car 2 descends and to descend when the car 2 ascends, and equipped with the driving machine 7 for causing the car 2 to ascend and descend, wherein the car fixing device is equipped with the lock bar 13 provided on the car 2 and adapted to move toward and away from the counterweight 3, and the weight frame 3b adapted to be engaged with the lock bar 13 when the lock bar 13 provided on the car 2 advances, thereby mutually locking the car 2 and the counterweight 3 in the ascent/descent direction.
- the device is free from the influence of an expansion of the rope 6 with age, making it possible to always keep the position of the driving machine 7 with respect to the car fixing position fixed.
- the lock bar 13 is substantially formed as a bar extending in the advancing/retreating direction and slidably guided in the advancing/retreating direction by the bracket 14, and the weight frame 3b has the lock hole 3c into which the forward end portion of the lock bar 13 is inserted.
- lock bar 13 is provided on the car 2 and the lock hole 3c is provided in the counterweight 3, conversely, it is also possible to provide the lock hole 3c in the car 2 and to provide the lock bar 13 on the counterweight 3.
- Fig. 7 is a diagram for illustrating a connecting device according to Embodiment 2.
- Fig. 8 is a diagram showing the connecting device in the connecting state.
- the connecting device of this embodiment has a lock bar 16 mounted to the weight frame 3b and a lock member 17 provided on the car frame 2a.
- the lock bar 16 is formed as a substantially T-shaped member composed of a short base portion 16b and a long main body portion 16a connected to the center of the base portion 16b, with the base portion 16b being rotatably supported by a shrouding ring 18.
- the lock bar 16 rotates using the base portion 16b as a fulcrum, and horizontally moves between a retreat position, where the lock bar 16 is substantially parallel to the weight frame 3b, and a connecting position, where the lock bar 16 is substantially perpendicular to the weight frame 3b.
- the lock member 17 provided on the car frame 2a has a lock groove 17a open horizontally outwards. At the position where positioning on the car 2 and the counterweight 3 is complete, rotation of the lock bar 16 toward the connecting position causes the main body portion 16a of the lock bar 16 to be engaged with the lock groove 17a of the lock member 17. The lock member 17 is engaged with the lock bar 16 to form a locking mechanism for mutually locking the car 2 and the counterweight 3 in the ascent/descent direction.
- the lock bar 16 and the shrouding ring 18, mounted to the weight frame 3b, are provided so as to attain a height which allows easy inspection of the driving machine 7 when the position has been reached where the car 2 and the weight 3 are connected together.
- Fig. 9 is a diagram for illustrating a connecting device according to Embodiment 3.
- the car frame 2a is equipped with an accommodation confirming switch 20 for detecting that the lock bar 13 of the connecting device 12 is at an accommodation position.
- This accommodation confirming switch 20 is electrically connected to the control device 35 of the elevator.
- the control device 35 takes in a signal from the accommodation confirming switch 20, and forms a safety circuit for preventing the elevator from being driven when the lock bar 13 is not in the accommodation position.
- this embodiment is of the same construction as Embodiment 1.
- Fig. 10 is a diagram for illustrating a connecting device according to Embodiment 4.
- a tension spring 21 serving as an elastic member for urging the lock bar 13 in the advancing direction.
- a roller 22 is provided at the forward end of the lock bar 13.
- the weight frame 3b as the locking mechanism has a parallel surface 3d parallel to the ascent/descent direction and the lock hole 3c formed in this parallel surface 3d. Urged by the tension spring 21, the lock bar 13 brings the roller 22 into contact with the parallel surface 3d and causes the roller 22 to slide thereon. When it is matched in position with the lock hole 3, the forward end portion of the lock bar is inserted into the lock hole 3c.
- a retreat confirming switch 20 for detecting that the lock bar 13 is at a retreat position.
- This retreat confirming switch 20 is electrically connected to the elevator control apparatus 35.
- the control device 35 takes in a signal from the retreat confirming switch 20, minimizing the car ascent/descent speed when the lock bar 13 is not at the retreat position. Further, when the lock bar 13 is inserted into the lock hole 3c for locking, it stops the ascent/descent of the car. That is, the control device 35 constitutes an operation restricting means.
- Fig. 11 is a schematic diagram schematically showing an elevator apparatus according to Embodiment 5.
- Fig. 12 is a schematic diagram showing how the operator performs maintenance operation, with the car and the counterweight being connected together.
- two return pulleys 8 are provided in the upper portion of the hoistway.
- the rope 6 is wrapped around the return pulleys 8, and dangles inside the hoistway 1.
- One end portion of the rope 6 first dangles, and is then turned upwards to be fixed to the counterweight-side rope fixing member 11 provided in the upper portion of the hoistway 1.
- the counterweight 3 is suspended from the portion of the rope 6 between the counterweight-side rope fixing member 11 and the return pulleys 8. Further, mounted on the counterweight 3 is the driving machine 7 for causing the car 2 and the counterweight 3 to ascend and descend. The counterweight 3 is suspended by wrapping the rope 6 around the sheave 7a of the driving machine 7.
- the other end portion of the rope 6 dangles downward similarly to be connected to the car 2, whereby the car 2 is suspended from the rope 6.
- this elevator car fixing device constructed as described above, it is possible to apply the connecting device 12 also to a so-called 1:1 roping type self-propelled elevator, in which the ratio of the movement distance of the car 2 to the movement length of the rope 6 is 1:1.
- Fig. 13 is a schematic diagram schematically showing an elevator according to Embodiment 6.
- Fig. 14 is a schematic diagram showing how the operator performs connecting operation, with positioning having being effected on the car and the counterweight.
- Fig. 15 is a diagram showing the side surfaces, the top surface, the front surface, and the rear surface of a photoreceptor type detection switch.
- there is provided on top of the car 2 a photoreceptor type detection switch 24 which detects approach of an object by receiving a laser beam emitted therefrom.
- a reflection plate 25 is provided on the counterweight 3.
- the photoreceptor type detection switch 24 constitutes a positioning detection means which receives detection light emitted toward the reflection plate 25 to thereby detect positioning.
- the photoreceptor type detection switch 24 has on its front side an emitting portion 24a and a light receiving portion 24b.
- a laser beam serving as the detection light emitted from the emitting portion 24a is received by the light receiving portion 24b.
- the reflection plate 25 reflects the laser beam to the light receiving portion 24b.
- a buzzer 26 is provided at the rear of the photoreceptor type detection switch 24.
- the buzzer 26 is operated to generate a beep based on a detection signal output when the photoreceptor type detection switch 24 receives detection light.
- the buzzer 26 constitutes an informing means for informing the operator of the completion of the positioning.
- the elevator car fixing device that fixes the car with respect to the counterweight, which is suitable for use in the self-propelled elevator in which the driving machine for causing the car and the counterweight to ascend and descend is mounted on the counterweight, in particular, the elevator in which the operator gets on top of the car to perform maintenance operation on the driving machine.
Abstract
Description
- The present invention relates to a self-propelled elevator in which a driving machine for causing a car and a counterweight to ascend and descend is mounted on the counterweight. In particular, the invention relates to an elevator car fixing device that fixes the car with respect to the counterweight in an elevator in which an operator gets on top of the car to perform maintenance operation on the driving machine.
- Fig. 16 is a perspective view of a conventional self-propelled elevator as proposed, for example, in JP 9-124259 A. Fig. 17 is a diagram schematically illustrating this elevator apparatus. In Figs. 16 and 17, a
car 2 and acounterweight 3 are arranged inside a hoistway of the elevator. Thecar 2 and thecounterweight 3 ascend and descend within the hoistway while being guided by car-side guide rails 4 and counterweight-side guide rails 5 with a T-shaped sectional configuration, respectively. - Mounted on the
counterweight 3 is adriving machine 7 for driving arope 6 wrapped around it. Thecounterweight 3 is further equipped with abrake device 31 that holds the side surfaces of a flange protruding in the outer periphery of a sheave of thedriving machine 7 by a spring pressure to effect braking. - Provided in an upper portion of the hoistway are a car-side
rope fixing member 10 for fixing the portion of therope 6 on thecar 2 side and a weight-siderope fixing member 11 for fixing the portion of therope 6 on thecounterweight 3 side. - Installed at a predetermined position in a lower portion of the hoistway is an
elevator control device 35 including a drive inverter for thedriving machine 7 mounted on thecounterweight 3. - Suspended inside the hoistway is an
elevator cable 32 containing a power line for driving thedriving machine 7 mounted on thecounterweight 3, a brake drive line, a speed feedback encoder line for detecting speed and position, etc. - The
elevator cable 32 is suspended between thecontrol device 35 and thedriving machine 7 by way of a building-side junction point 33 and ajunction point 34 under thecar 2. - The
car 2 is suspended from the portion of therope 6 between the car-siderope fixing member 10 and areturn pulley 8. Thecar 2 is suspended by wrapping therope 6 around asash pulley 9 rotatably supported on a side surface of the car. - The
counterweight 3 is suspended from the portion of therope 6 between the counterweight-siderope fixing member 11 and thereturn pulley 8. Thecounterweight 3 is suspended by wrapping therope 6 around the sheave of thedriving machine 7. - When the
driving machine 7 provided on thecounterweight 3 is driven, the sheave rotates, and thecar 2 and thecounterweight 3 are caused to ascend and descend within the hoistway 1. When thecar 2 descends, thecounterweight 3 ascends, and when thecar 2 ascends, thecounterweight 3 descends. - In the elevator thus constructed, that is, in the so-called self-propelled elevator in which the
driving machine 7 for causing thecar 2 to ascend and descend is mounted on thecounterweight 3, the operator gets on top of thecar 2, and thecar 2 is moved to a position where maintenance of thedriving machine 7 is possible, that is, to the position where thecar 2 passes thecounterweight 3, the operator reaching out from thecar 2 to inspect thedriving machine 7. - Conventionally, there has been proposed a car fixing device for fixing the car to a stationary portion in the hoistway, such as a guide rail, as a device for mechanically preventing inadvertent movement of the
car 2 during maintenance operation when the maintenance operation is thus to be performed on thedriving machine 7 by reaching out from the top of thecar 2. - Fig. 18 is a perspective view of a conventional car fixing device as disclosed, for example, in JP 2000-203774 A.
- As shown in Fig. 18, there is provided on top of the
car 2 anoperating mechanism 50 having alock bar 41 adapted to longitudinally advance and retreat and abracket 42 for securing thislock bar 41 at a predetermined position. Thelock bar 41 has anoperating lever 43 protruding from a side surface portion thereof. When theoperating lever 43 is removed from an operatinglever insertion groove 42b of thebracket 42, and thelock bar 41 is moved toward afixing mechanism 44 to insert the forward longitudinal end portion of thelock bar 41 into a lock bar insertion hole 44a of thefixing mechanism 44 which is provided on the guide rail, thecar 2 is mechanically fixed in position. Thereafter, theoperating lever 43 is inserted into an operatinglever insertion groove 42a to thereby prevent thelock bar 41 from coming out of engagement with thefixing mechanism 44. - In this conventional elevator car fixing device, constructed as described above, the
car 2 is fixed to a stationary portion in the hoistway, such as a guide rail. Thus, when therope 6 becomes longer with age, the position of thedriving machine 7 with respect to the car fixing position is lowered, which leads to a hindrance to maintenance operation. - The present invention has been made with a view toward solving the above problem in the prior art. It is an object of the present invention to provide an elevator car fixing device in which the car and the counterweight are fixed in position in a state they are connected together, so that the device is free from the influence of the expansion of the rope with age, making it possible to fix the position of the driving machine with respect to the car fixing position.
- According to the present invention, there is provided an elevator car fixing device which is provided in an elevator, the elevator including: a rope arranged in a hoistway and wrapped around a return pulley arranged in an upper portion of the hoistway; a car suspended from one end of the rope; and a counterweight suspended from a portion of the rope between a counterweight-side rope fixing member, which is provided in the upper portion of the hoistway and to which the other end of the rope is fixed, and the return pulley, the counterweight being adapted to ascend when the car descends and to descend when the car ascends and equipped with a driving machine for causing the car to ascend and descend, the elevator car fixing device including an advancing/retreating member provided on one of the car and the counterweight and adapted to move toward and away from the other of the car and the counterweight, and a locking mechanism provided on the other of the car and the counterweight and adapted to be engaged with the advancing/retreating member when the advancing/retreating member advances to thereby lock the car and the counterweight with respect to each other in an ascent/descent direction. Thus, when the operator gets on top of the car to perform maintenance operation on the driving machine, any inadvertent motion of the car during the operation is mechanically inhibited, making it possible to perform the operation in a stable manner and with ease. The device is free from the influence of the expansion of the rope with age, making it possible to fix the position of the driving machine with respect to the car fixing position.
-
- Fig. 1 is a perspective view of an elevator, showing an elevator car fixing device according to Embodiment 1 of the present invention.
- Fig. 2 is a diagram showing how an operator works on top of the car of the elevator of Fig. 1.
- Fig. 3 is a schematic diagram schematically showing the elevator of Embodiment 1.
- Fig. 4 is a schematic diagram illustrating how the operator performs maintenance operation, with the car and a counterweight being connected together.
- Fig. 5 is a diagram for illustrating a connecting device according to Embodiment 1.
- Fig. 6 is a diagram showing the connecting device of Fig. 5 in the connecting state.
- Fig. 7 is a diagram for illustrating a connecting device
according to
Embodiment 2. - Fig. 8 is a diagram showing the connecting device of Fig. 7 in the connecting state.
- Fig. 9 is a diagram for illustrating a connecting device
according to
Embodiment 3. - Fig. 10 is a diagram for illustrating a connecting device
according to
Embodiment 4. - Fig. 11 is a schematic diagram schematically showing an
elevator according to
Embodiment 5. - Fig. 12 is a schematic diagram illustrating how the operator performs maintenance operation, with the car and the counterweight being connected together.
- Fig. 13 is a schematic diagram schematically showing an
elevator according to
Embodiment 6. - Fig. 14 is a schematic diagram illustrating how the operator performs maintenance operation, with the car and the counterweight being connected together.
- Fig. 15 is a diagram showing the side surfaces, the top surface, the front surface, and the rear surface of a photoreceptor type detection switch.
- Fig. 16 is a perspective view of a conventional self-propelled elevator.
- Fig. 17 is a schematic view of a conventional elevator apparatus.
- Fig. 18 is a perspective view of a conventional car fixing device.
-
- Fig. 1 is a perspective view of an elevator, showing an elevator car fixing device according to Embodiment 1 of the present invention. Further, Fig. 2 is a diagram showing how an operator works on top of the car of the elevator of Fig. 1. Fig. 3 is a schematic diagram schematically showing the elevator of this embodiment. Fig. 4 is a schematic diagram illustrating how the operator performs maintenance operation, with the car and a counterweight being connected together.
- In the drawings, a
car 2 and acounterweight 3 are arranged in a hoistway 1 of the elevator. Thecar 2 and thecounterweight 3 ascend and descend inside the hoistway 1 while being guided by car-side guide rails 4 and weight-side guide rails 5 with a T-shaped sectional configuration, respectively. Thecounterweight 3 has aweight frame 3b formed by connecting together four frame members with a U-shaped section into a rectangular configuration, and a plurality ofweights 3a accommodated in theweight frame 3b in different numbers for adjustment in weight. Further, mounted on thecounterweight 3 is adriving machine 7 for causing thecar 2 and thecounterweight 3 to ascend and descend. As in the prior art, thecounterweight 3 is equipped with a brake device, which is not shown here. - A
return pulley 8 is provided in the upper portion of the hoistway 1. Arope 6 is wrapped around thereturn pulley 8, and dangles in the hoistway 1. One end portion of therope 6 dangles first, and is then turned upwards to be fixed to a car-siderope fixing member 10 provided in the upper portion of the hoistway 1. Similarly, the other end portion of therope 6 dangles first, and is then turned upwards to be fixed to a counterweight-siderope fixing member 11 provided in the upper portion of the hoistway 1. - The
car 2 is suspended from the portion of therope 6 between the car-siderope fixing member 10 and thereturn pulley 8. In suspending thecar 2, therope 6 is wrapped around asash pulley 9 provided under the car. Thecounterweight 3 is suspended from the portion of therope 6 between the counterweight-siderope fixing member 11 and thereturn pulley 8. In suspending thecounterweight 3, therope 6 is wrapped around asheave 7a of the drivingmachine 7. - When the driving
machine 7 provided on thecounterweight 3 is driven, thesheave 7a rotates, and thecar 2 and thecounterweight 3 ascend and descend within the hoistway 1. When thecar 2 descends, thecounterweight 3 ascends, and when thecar 2 ascends, thecounterweight 3 descends. - In this embodiment, there is used a so-called 2:1 roping type elevator, in which the ratio of the movement distance of the
car 2 to the movement length of therope 6 is 2:1. - On the top surface of the
car 2, there is provided a connectingdevice 12 for connecting thecar 2 and thecounterweight 3 with each other in the ascent/descent direction. - In the lower portion of the hoistway 1, there is installed a
control device 35 for operating the elevator. As in the prior art, between thecontrol device 35 and the drivingmachine 7, there is provided an elevator cable, which is not shown here. - Fig. 5 is a diagram for illustrating the connecting device of this embodiment. Fig. 6 is a diagram showing the connecting device in the connecting state. The connecting
device 12 has alock bar 13 provided on thecar 2 and serving as an advancing/retreatingmember 13 adapted to move toward and away from thecounterweight 3, and alock hole 3c which is provided in thecounterweight 3 and into which the forward end portion of thelock bar 13 is inserted when thelock bar 13 advances. Thelock hole 3c is formed in aweight frame 3b. The height of thelock hole 3c is determined such that, when thecar 2 and thecounterweight 3 are connected together, the drivingmachine 7 attains a height which facilitates the inspection thereof. Theweight frame 3b is engaged with thelock bar 13 to constitute a locking mechanism for locking thecar 2 and thecounterweight 3 with respect to each other in the ascent/descent direction. - The
lock bar 13 is slidably supported by abracket 14 serving as a guide member provided on thecar frame 2a. Two side surfaces of thebracket 14 have through-holes 14a. Thelock bar 13 is passed through these two through-holes 14a, and is supported so as to be capable of moving toward and away from thecounterweight 3. An operatinglever 13a protrudes from the outer peripheral surface of thelock bar 13. This operatinglever 13a is engaged with a U-shaped guide slit 14b formed in thebracket 14, and regulates the movement of thelock bar 13. When the operatinglever 13a is engaged with a lateral groove at the advance end of theguide slit 14b, thelock bar 13 is secured in the connecting position. When the operatinglever 13a is engaged with a lateral groove at the retreat end of theguide slit 14b, thelock bar 13 is secured in the retreat position. - As in this embodiment, in a so-called self-propelled elevator, in which the
elevator driving machine 7 is mounted on thecounterweight 3, the operator gets on top of thecar 2, as shown in Figs. 2 and 4, when maintenance is to be performed on the drivingmachine 7, and moves close to the place where thecar 2 and thecounterweight 3 pass each other, reaching out from the car to perform maintenance on the drivingmachine 7. - When the
car 2 and thecounterweight 3 are to be connected together, the operator performs positioning on thecar 2 and thecounterweight 3. When the position has been reached where the positioning on thecar 2 and thecounterweight 3 is complete, the operatinglever 13a is removed from the lateral groove at the retreat position, and thelock bar 13 is caused to advance, and inserted into thelock hole 3c, with the operatinglever 13a being fixed to the lateral groove at the connecting position. By this operation, thecar 2 and thecounterweight 3 are mutually regulated in their movement in the ascent/descent direction. - The elevator car fixing device, constructed as described above, is provided in an elevator having: the
rope 6 wrapped around thereturn pulley 8 and arranged in the hoistway 1, with thereturn pulley 8 being arranged in the upper portion of the elevator hoistway; thecar 2 suspended from one end of therope 6; and thecounterweight 3 suspended from the portion of therope 6 between the counterweight-siderope fixing member 11 in the upper portion of the hoistway 1, to which the other end of therope 6 is fixed, and thereturn pulley 8, thecounterweight 3 being adapted to ascend when thecar 2 descends and to descend when thecar 2 ascends, and equipped with the drivingmachine 7 for causing thecar 2 to ascend and descend, wherein the car fixing device is equipped with thelock bar 13 provided on thecar 2 and adapted to move toward and away from thecounterweight 3, and theweight frame 3b adapted to be engaged with thelock bar 13 when thelock bar 13 provided on thecar 2 advances, thereby mutually locking thecar 2 and thecounterweight 3 in the ascent/descent direction. Therefore, when the operator gets on top of thecar 2 to perform maintenance on the drivingmachine 7, it is possible to mechanically prevent any inadvertent motion of thecar 2 during the maintenance operation, making it possible to perform the operation in a stable manner and with ease. Further, the device is free from the influence of an expansion of therope 6 with age, making it possible to always keep the position of the drivingmachine 7 with respect to the car fixing position fixed. - Further, the
lock bar 13 is substantially formed as a bar extending in the advancing/retreating direction and slidably guided in the advancing/retreating direction by thebracket 14, and theweight frame 3b has thelock hole 3c into which the forward end portion of thelock bar 13 is inserted. Thus, it is possible to easily form the mechanism for mutually locking the car and the counterweight in the ascent/descent direction. - While in this embodiment the
lock bar 13 is provided on thecar 2 and thelock hole 3c is provided in thecounterweight 3, conversely, it is also possible to provide thelock hole 3c in thecar 2 and to provide thelock bar 13 on thecounterweight 3. - Fig. 7 is a diagram for illustrating a connecting device according to
Embodiment 2. Fig. 8 is a diagram showing the connecting device in the connecting state. The connecting device of this embodiment has alock bar 16 mounted to theweight frame 3b and alock member 17 provided on thecar frame 2a. Thelock bar 16 is formed as a substantially T-shaped member composed of ashort base portion 16b and a longmain body portion 16a connected to the center of thebase portion 16b, with thebase portion 16b being rotatably supported by ashrouding ring 18. Thelock bar 16 rotates using thebase portion 16b as a fulcrum, and horizontally moves between a retreat position, where thelock bar 16 is substantially parallel to theweight frame 3b, and a connecting position, where thelock bar 16 is substantially perpendicular to theweight frame 3b. - The
lock member 17 provided on thecar frame 2a has alock groove 17a open horizontally outwards. At the position where positioning on thecar 2 and thecounterweight 3 is complete, rotation of thelock bar 16 toward the connecting position causes themain body portion 16a of thelock bar 16 to be engaged with thelock groove 17a of thelock member 17. Thelock member 17 is engaged with thelock bar 16 to form a locking mechanism for mutually locking thecar 2 and thecounterweight 3 in the ascent/descent direction. - The
lock bar 16 and theshrouding ring 18, mounted to theweight frame 3b, are provided so as to attain a height which allows easy inspection of the drivingmachine 7 when the position has been reached where thecar 2 and theweight 3 are connected together. - In this elevator car fixing device, constructed as described above, when the operator gets on top of the
car 2 to perform maintenance on the drivingmachine 7, thecar 2 is fixed in position by connecting thecar 2 with thecounterweight 3, making it possible to mechanically prevent any inadvertent movement of the car during the maintenance operation. - Fig. 9 is a diagram for illustrating a connecting device according to
Embodiment 3. In this embodiment, thecar frame 2a is equipped with anaccommodation confirming switch 20 for detecting that thelock bar 13 of the connectingdevice 12 is at an accommodation position. Thisaccommodation confirming switch 20 is electrically connected to thecontrol device 35 of the elevator. In addition to signals from other peripheral apparatuses, thecontrol device 35 takes in a signal from theaccommodation confirming switch 20, and forms a safety circuit for preventing the elevator from being driven when thelock bar 13 is not in the accommodation position. Otherwise, this embodiment is of the same construction as Embodiment 1. - In this elevator car fixing device, constructed as described above, the elevator cannot be operated if the
lock bar 13 is not completely accommodated in the accommodation position. Thus, there is no fear of the elevator being operated without canceling the lock of the connectingdevice 12, making it possible to prevent damage to the relevant apparatuses, etc. - Fig. 10 is a diagram for illustrating a connecting device according to
Embodiment 4. In this embodiment, there is stretched between thebracket 14 and the rear end of thelock bar 13 atension spring 21 serving as an elastic member for urging thelock bar 13 in the advancing direction. Further, aroller 22 is provided at the forward end of thelock bar 13. - The
weight frame 3b as the locking mechanism has aparallel surface 3d parallel to the ascent/descent direction and thelock hole 3c formed in thisparallel surface 3d. Urged by thetension spring 21, thelock bar 13 brings theroller 22 into contact with theparallel surface 3d and causes theroller 22 to slide thereon. When it is matched in position with thelock hole 3, the forward end portion of the lock bar is inserted into thelock hole 3c. - Further, there is provided a
retreat confirming switch 20 for detecting that thelock bar 13 is at a retreat position. Thisretreat confirming switch 20 is electrically connected to theelevator control apparatus 35. In addition to signals from other peripheral apparatuses, thecontrol device 35 takes in a signal from theretreat confirming switch 20, minimizing the car ascent/descent speed when thelock bar 13 is not at the retreat position. Further, when thelock bar 13 is inserted into thelock hole 3c for locking, it stops the ascent/descent of the car. That is, thecontrol device 35 constitutes an operation restricting means. - In this elevator car fixing device, constructed as described above, when, for example, the
lock bar 13 is brought into contact with theparallel surface 3d of theweight frame 3b, with thecounterweight 3 being slightly above the position to be attained through positioning, thelock bar 13 is urged toward thecounterweight 3 by the force of thetension spring 21. When, in this state, the alignment between thecounterweight 3 and thecar 2 is pursued, theroller 22 slides on theparallel surface 3d, and thelock bar 13 automatically enters thelock hole 3c upon matching in position between thelock bar 13 and thelock hole 3c. Thus, the alignment operation is facilitated. - Fig. 11 is a schematic diagram schematically showing an elevator apparatus according to
Embodiment 5. Fig. 12 is a schematic diagram showing how the operator performs maintenance operation, with the car and the counterweight being connected together. In the drawings, tworeturn pulleys 8 are provided in the upper portion of the hoistway. Therope 6 is wrapped around the return pulleys 8, and dangles inside the hoistway 1. One end portion of therope 6 first dangles, and is then turned upwards to be fixed to the counterweight-siderope fixing member 11 provided in the upper portion of the hoistway 1. - The
counterweight 3 is suspended from the portion of therope 6 between the counterweight-siderope fixing member 11 and the return pulleys 8. Further, mounted on thecounterweight 3 is the drivingmachine 7 for causing thecar 2 and thecounterweight 3 to ascend and descend. Thecounterweight 3 is suspended by wrapping therope 6 around thesheave 7a of the drivingmachine 7. - The other end portion of the
rope 6 dangles downward similarly to be connected to thecar 2, whereby thecar 2 is suspended from therope 6. - When the
driving device 7 provided on thecounterweight 3 is driven, thesheave 7a rotates, and thecar 2 and thecounterweight 3 ascend and descend within the hoistway 1. When thecar 2 descends, thecounterweight 3 ascends, and when thecar 2 ascends, thecounterweight 3 descends. On the top surface of thecar 2, there is provided the connectingdevice 12 similar to that of Embodiment 1. - In this elevator car fixing device, constructed as described above, it is possible to apply the connecting
device 12 also to a so-called 1:1 roping type self-propelled elevator, in which the ratio of the movement distance of thecar 2 to the movement length of therope 6 is 1:1. - Fig. 13 is a schematic diagram schematically showing an elevator according to
Embodiment 6. Fig. 14 is a schematic diagram showing how the operator performs connecting operation, with positioning having being effected on the car and the counterweight. Fig. 15 is a diagram showing the side surfaces, the top surface, the front surface, and the rear surface of a photoreceptor type detection switch. In this embodiment, there is provided on top of thecar 2 a photoreceptortype detection switch 24 which detects approach of an object by receiving a laser beam emitted therefrom. Areflection plate 25 is provided on thecounterweight 3. The photoreceptortype detection switch 24 constitutes a positioning detection means which receives detection light emitted toward thereflection plate 25 to thereby detect positioning. - As shown in Fig. 15, the photoreceptor
type detection switch 24 has on its front side an emitting portion 24a and alight receiving portion 24b. A laser beam serving as the detection light emitted from the emitting portion 24a is received by thelight receiving portion 24b. When thecounterweight 3 has reached the position to be attained through positioning, thereflection plate 25 reflects the laser beam to thelight receiving portion 24b. - A
buzzer 26 is provided at the rear of the photoreceptortype detection switch 24. Thebuzzer 26 is operated to generate a beep based on a detection signal output when the photoreceptortype detection switch 24 receives detection light. Thebuzzer 26 constitutes an informing means for informing the operator of the completion of the positioning. - In this elevator car fixing device, constructed as described above, by keeping the photoreceptor
type detection switch 24 ON, a beep is issued when thecar 2 and thecounterweight 3 are aligned with each other, thus facilitating the positioning operation. - While in this embodiment the
buzzer 26 is used as the informing means, it is also possible to adopt, for example, an arrangement in which a lamp illuminates upon alignment. - According to the present invention, there is provided the elevator car fixing device that fixes the car with respect to the counterweight, which is suitable for use in the self-propelled elevator in which the driving machine for causing the car and the counterweight to ascend and descend is mounted on the counterweight, in particular, the elevator in which the operator gets on top of the car to perform maintenance operation on the driving machine.
Claims (12)
- An elevator car fixing device provided in an elevator, the elevator including:a rope arranged in a hoistway and wrapped around a return pulley arranged in an upper portion of the hoistway;a car suspended from one end of the rope; anda counterweight suspended from a portion of the rope between a counterweight-side rope fixing member, which is provided in the upper portion of the hoistway and to which the other end of the rope is fixed, and the return pulley, the counterweight being adapted to ascend when the car descends and to descend when the car ascends and equipped with a driving machine for causing the car to ascend and descend,the elevator car fixing device being characterized by comprising:an advancing/retreating member provided on one of the car and the counterweight and adapted to move toward and away from the other of the car and the counterweight; anda locking mechanism provided on the other of the car and the counterweight and adapted to be engaged with the advancing/retreating member when the advancing/retreating member advances to thereby lock the car and the counterweight with respect to each other in an ascent/descent direction.
- An elevator car fixing device according to Claim 1,
wherein the advancing/retreating member is formed substantially as a bar extending in the advancing/retreating direction and slidably guided in an advancing/retreating direction by a guide member, and
wherein the locking mechanism has a lock hole into which a forward end portion of the advancing/retreating member is inserted. - An elevator car fixing device according to Claim 2, further comprising an elastic member urging the advancing/retreating member in the advancing direction,
wherein the advancing/retreating member has a roller at the forward end portion,
wherein the locking mechanism has a parallel surface that is parallel to the ascent/descent direction, and the lock hole formed in the parallel surface, and
wherein the advancing /retreating member is urged by the elastic member to cause the roller to slide on the parallel surface while being held in contact with the parallel surface, causing the forward end portion to be inserted into the lock hole when a position corresponding to the lock hole is reached. - An elevator car fixing device according to Claim 1,
wherein the advancing/retreating member is formed substantially as a bar and is provided so as to be rotatable within a horizontal plane while being axially supported at its rear end, and
wherein the locking mechanism has a lock groove with which a main body portion of the advancing/retreating member is engaged. - An elevator car fixing device according to any one of Claims 1, 2, and 4, further comprising:a retreat confirming switch for detecting a retreat position of the advancing/retreating member; anda safety circuit which operates based on a signal from the retreat confirming switch and which inhibits a drive of the elevator when the advancing/retreating member is not at the retreat position.
- An elevator car fixing device according to any one of Claims 1 to 4, further comprising:a retreat confirming switch for detecting a retreat position of the advancing/retreating member; andan operation restricting means which operates based on a signal from the retreat confirming switch, for minimizing an ascent/descent speed of the car when the advancing/retreating member is not at the retreat position.
- An elevator car fixing device according to any one of Claims 1 through 6, further comprising:a positioning detection means for detecting positioning performed on the car and the counterweight; andan informing means for informing an operator of completion of the positioning.
- An elevator car fixing device according to Claim 7, wherein the positioning detection means has a reflection plate provided on one of the car and the counterweight and a photoreceptor type detection switch provided on the other of the car and the counterweight and adapted to receive a detection light emitted toward the reflection plate to detect the positioning.
- An elevator car fixing device according to any one of Claims 1 through 8, wherein the advancing/retreating member is provided on the car.
- An elevator car fixing device according to any one of Claims 1 through 8, wherein the advancing/retreating member is provided on the counterweight.
- An elevator car fixing device according to any one of Claims 1 through 10,
wherein the other end of the rope is fixed to a car-side rope fixing member in the upper portion of the hoistway, and
wherein the car is connected with a sash pulley arranged between the car-side rope fixing member and the return pulley and suspended from the rope. - An elevator car fixing device according to any one of Claims 1 through 10, wherein the other end of the rope is connected to the car.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2002/009462 WO2004024610A1 (en) | 2002-09-13 | 2002-09-13 | Device for securing cage of elevator |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1538122A1 true EP1538122A1 (en) | 2005-06-08 |
EP1538122A4 EP1538122A4 (en) | 2011-05-11 |
EP1538122B1 EP1538122B1 (en) | 2012-01-11 |
Family
ID=31986106
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02765552A Expired - Fee Related EP1538122B1 (en) | 2002-09-13 | 2002-09-13 | Device for securing cage of elevator |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1538122B1 (en) |
JP (1) | JP4197515B2 (en) |
KR (1) | KR100614146B1 (en) |
CN (1) | CN1319838C (en) |
WO (1) | WO2004024610A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11078043B2 (en) | 2017-05-12 | 2021-08-03 | Otis Elevator Company | Elevator overrun systems |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4693565B2 (en) * | 2005-09-16 | 2011-06-01 | 東芝エレベータ株式会社 | elevator |
CN101134547B (en) * | 2006-08-30 | 2010-12-15 | 上海三菱电梯有限公司 | Elevator car fixing device |
JP2016098106A (en) * | 2014-11-26 | 2016-05-30 | 三菱電機株式会社 | Car fixation device for elevator |
JP6468932B2 (en) * | 2015-04-20 | 2019-02-13 | 株式会社日立製作所 | Elevator equipment |
KR101651840B1 (en) * | 2016-02-04 | 2016-08-29 | (주)토인이앤씨건축사사무소 | Pit equipment |
KR20240007959A (en) | 2018-06-22 | 2024-01-17 | 닛폰세이테츠 가부시키가이샤 | Steel sheet, tailored blank, the hot press forming bosom, steel pipe, hollow phase quenching molded product, the manufacturing method of steel sheet, the manufacturing method of tailored blank, the manufacturing method of the hot press forming bosom, the manufacturing method of the steel pipe, and the manufacturing method of the hollow phase quenching molded product |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0776859A2 (en) * | 1995-11-29 | 1997-06-04 | Otis Elevator Company | Locking elevator car frame to building during loading/unloading horizontally moveable cab |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2509072Y2 (en) * | 1987-04-23 | 1996-08-28 | 株式会社 日立ビルシステムサービス | Elevator inspection safety device |
JP3360972B2 (en) * | 1995-06-19 | 2003-01-07 | 三菱電機ビルテクノサービス株式会社 | Elevator with car stopper |
JP3225811B2 (en) * | 1995-11-06 | 2001-11-05 | 三菱電機株式会社 | Elevator equipment |
JP2000203774A (en) * | 1998-11-12 | 2000-07-25 | Toshiba Corp | Stop locking device for elevator car |
JP2000211835A (en) * | 1999-01-25 | 2000-08-02 | Hitachi Ltd | Hydraulic elevator |
-
2002
- 2002-09-13 WO PCT/JP2002/009462 patent/WO2004024610A1/en active Application Filing
- 2002-09-13 KR KR1020047007205A patent/KR100614146B1/en not_active IP Right Cessation
- 2002-09-13 EP EP02765552A patent/EP1538122B1/en not_active Expired - Fee Related
- 2002-09-13 JP JP2004535853A patent/JP4197515B2/en not_active Expired - Fee Related
- 2002-09-13 CN CNB028179897A patent/CN1319838C/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0776859A2 (en) * | 1995-11-29 | 1997-06-04 | Otis Elevator Company | Locking elevator car frame to building during loading/unloading horizontally moveable cab |
Non-Patent Citations (1)
Title |
---|
See also references of WO2004024610A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11078043B2 (en) | 2017-05-12 | 2021-08-03 | Otis Elevator Company | Elevator overrun systems |
Also Published As
Publication number | Publication date |
---|---|
JPWO2004024610A1 (en) | 2006-01-05 |
EP1538122A4 (en) | 2011-05-11 |
EP1538122B1 (en) | 2012-01-11 |
WO2004024610A1 (en) | 2004-03-25 |
KR20040066115A (en) | 2004-07-23 |
KR100614146B1 (en) | 2006-08-25 |
JP4197515B2 (en) | 2008-12-17 |
CN1555336A (en) | 2004-12-15 |
CN1319838C (en) | 2007-06-06 |
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