EP2660180A1 - Overspeed detecting device for elevator apparatus with a safety interlock - Google Patents
Overspeed detecting device for elevator apparatus with a safety interlock Download PDFInfo
- Publication number
- EP2660180A1 EP2660180A1 EP13179074.3A EP13179074A EP2660180A1 EP 2660180 A1 EP2660180 A1 EP 2660180A1 EP 13179074 A EP13179074 A EP 13179074A EP 2660180 A1 EP2660180 A1 EP 2660180A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- car
- overspeed
- speed
- circuit portion
- detecting device
- 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
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- 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
- B66B5/04—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed
- B66B5/06—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed electrical
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B1/00—Control systems of elevators in general
- B66B1/34—Details, e.g. call counting devices, data transmission from car to control system, devices giving information to the control system
- B66B1/3492—Position or motion detectors or driving means for the detector
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- 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
Definitions
- the present invention relates to an elevator apparatus having an electronic overspeed detecting device for monitoring whether or not a speed of a car reaches an overspeed monitoring pattern.
- a speed detecting device of a conventional elevator apparatus employs a pulse disc composed of a first circular plate and a second circular plate that are superposed one on another. By changing the angle of superposition of the second circular plate with respect to the first circular plate, the number of effective through-holes of the pulse disc is changed. More specifically, during an inspective operation of checking whether or not the speed detecting device operates normally, the number of the effective through-holes is doubled, so a speed of a hoisting machine that is twice as high as a normal speed thereof is detected in a simulative manner (e. g. , see Patent Document 1).
- the present invention has been made to solve the problem as described above, and it is therefore an object of the present invention to obtain an elevator apparatus allowing an operation of inspecting an electronic safety system including an electronic overspeed detecting device to be performed with ease.
- the elevator apparatus includes: a car for being raised/lowered within a hoistway; a brake portion for braking raising/lowering of the car; a safety circuit portion for being opened to cause the brake portion to perform a braking operation; and an electronic overspeed detecting device, which has an overspeed monitoring pattern set to change continuously at least with respect to a position within a car slowdown section of a terminal portion of the hoistway, for monitoring whether or not a speed of the car reaches the overspeed monitoring pattern, and in the elevator apparatus, the electronic overspeed detecting device has operation modes including an inspection mode for inspecting the electronic overspeed detecting device itself, and the safety circuit portion is opened in response to a switch in operation mode to the inspection mode.
- Fig. 1 is a structural diagram of an elevator apparatus according to Embodiment 1 of the present invention.
- a hoistway 1 includes a pair of car guide rails 2 and a pair of counterweight guide rails (not shown) provided therein.
- a car 3 is raised and lowered in the hoistway 1 while being guided by the car guide rails 2.
- a counterweight 4 is raised and lowered in the hoistway 1 while being guided by the counterweight guide rail.
- the safety device 5 is provided in a lower part of the car 3 that engages with the car guide rails 2 to stop the car 3 in case of an emergency.
- the safety device 5 has a pair of braking pieces (wedge members) 6 that are moved by mechanical operation to be pushed against the car guide rails 2.
- a driving apparatus (hoisting machine) 7 that raises and lowers the car 3 and the counterweight 4 via a main rope is provided.
- the driving apparatus 7 has: a drive sheave 8; a motor portion (not shown) that rotates the drive sheave 8; a brake portion 9 that brakes the rotation of the drive sheave 8; and a motor encoder 10 that generates a detection signal according to the rotation of the drive sheave 8.
- the brake portion 9 is, for example, an electromagnetic brake apparatus.
- a spring force of a braking spring is used to push a brake shoe against a braking surface to brake the rotation of the drive sheave 8 and an electromagnetic magnet is excited to separate the brake shoe from the braking surface to cancel the braking.
- An elevator control panel 11 is provided, for example, in a lower part of the hoistway 1.
- the elevator control panel 11 includes: an operation control portion 12 that controls operation of the driving apparatus 7; and a safety circuit portion (relay circuit portion) 13 that suddenly stops the car 3 when the elevator has abnormality.
- the operation control portion 12 is input with a detection signal from the motor encoder 10. Based on the detection signal from the motor encoder 10, the operation control portion 12 calculates the position and speed of the car 3 to control the driving apparatus 7.
- a speed governor (mechanical speed governor) 14 is provided in the upper part of the hoistway 1.
- the speed governor 14 includes: a speed governor sheave 15, an overspeed detection switch 16, a rope catch 17, and a speed governor encoder 18 serving as a sensor.
- the speed governor sheave 15 is wound at a speed governor rope 19. Both ends of the speed governor rope 19 are connected to an operational mechanism of the safety device 5.
- the lower end of the speed governor rope 19 is wound around a tension sheave 20 provided in the lower part of the hoistway 1.
- the speed governor rope 19 When the car 3 is raised or lowered, the speed governor rope 19 is moved in circulation and the speed governor sheave 15 is rotated at a rotation speed corresponding to a traveling speed of the car 3.
- the speed governor 14 mechanically detects that the traveling speed of the car 3 reaches an overspeed.
- Set as overspeeds to be detected are a first overspeed (OS speed) that is higher than a rated speed and a second overspeed (Trip speed) that is higher than the first overspeed.
- the overspeed detection switch 16 When the traveling speed of the car 3 reaches the first overspeed, the overspeed detection switch 16 is operated. When the overspeed detection switch 16 is operated, the relay circuit of the safety circuit portion 13 is opened. When the traveling speed of the car 3 reaches the second overspeed, the rope catch 17 grips the speed governor rope 19 to stop the circulation of the speed governor rope 19. When the circulation of the speed governor rope 19 is stopped, the safety device 5 provides a braking operation.
- the speed governor encoder 18 generates a detection signal according to the rotation of the speed governor sheave 15.
- the speed governor encoder 18 employs a dual sense type encoder that simultaneously outputs two types of detection signals, i.e., a first detection signal and a second detection signal.
- the first detection signal and the second detection signal from the speed governor encoder 18 are input to an ETS circuit portion 22 (electronic overspeed detection device) of an Emergency Terminal Slowdown apparatus (ETS apparatus) provided at an electronic safety controller 21.
- the ETS circuit portion 22 detects, based on a detection signal from the speed governor encoder 18, abnormality of an elevator and outputs a command signal for shifting the elevator to a safe state. More specifically, the ETS circuit portion 22 calculates, independently from the operation control portion 12, the traveling speed and a position of the car 3 based on the signal from the speed governor encoder 18, and monitors whether the traveling speed of the car 3 reaches an overspeed monitoring pattern (overspeed detection level).
- the overspeed monitoring pattern is set to change continuously with respect to a position within a car slowdown section of a terminal portion of the hoistway.
- the ETS circuit portion 22 also converts the signal from the speed governor encoder 18 to a digital signal to perform a digital calculation processing and determine whether the traveling speed of the car 3 reaches an ETS monitoring overspeed. When the ETS circuit portion 22 determines that the traveling speed of the car 3 has reached the ETS monitoring overspeed, the relay circuit of safety circuit portion 13 is opened.
- the ETS circuit portion 22 can also detect abnormality of the ETS circuit portion 22 itself and abnormality of the speed governor encoder 18. When the ETS circuit portion 22 detects abnormality of the ETS circuit portion 22 itself or abnormality of the speed governor encoder 18, a nearest floor stop command signal is output from the ETS circuit portion 22 to the operation control portion 12 as a command signal for shifting the elevator to a safe state. Interactive communication is also possible between the ETS circuit portion 22 and the operation control portion 12.
- first to fourth reference sensors 23 to 26 for detecting that the car 3 is located at a reference position in the hoistway.
- Top and bottom terminal landing switches can be used for the reference sensors 23 to 26.
- Detection signals from the reference sensors 23 to 26 are input to the ETS circuit portion 22. Based on the detection signals from the reference sensors 23 to 26, the ETS circuit portion 22 corrects the information for the position of the car 3 calculated in the ETS circuit portion 22.
- a car buffer 27 and a counterweight buffer 28 are provided on a bottom face of the hoistway 1.
- These buffers 27 and 28 may be, for example, an oil-filled-type or spring-type buffer.
- Fig. 2 is a graph of overspeed patterns set in the speed governor 14 and the ETS circuit portion 22 of Fig. 1 .
- the speed governor 14 is associated with a first overspeed pattern V 1 and a second overspeed pattern V 2 by a mechanical position adjustment.
- the ETS circuit portion 22 is associated with an ETS overspeed monitoring pattern V E .
- the ETS overspeed monitoring pattern V E is set to be higher than the normal speed pattern V 0 .
- the ETS overspeed monitoring pattern V E is also set to have an equal interval from the normal speed pattern V 0 in the entire ascending/descending process. In other words, the ETS overspeed monitoring pattern V E changes according to a car position. More specifically, the ETS overspeed monitoring pattern V E is set to be fixed in the vicinity of an intermediate floor and is set to continuously and smoothly decline, in the vicinity of a terminal landing, while being closer to an end of the hoistway 1 (upper end and lower end).
- the ETS circuit portion 22 monitors the traveling speed of the car 3 not only in a position in the vicinity of terminal landings but also in a position in the vicinity of an intermediate floor (a fixed speed traveling zone in the normal speed pattern V 0 ). However, the ETS circuit portion 22 does not always have to monitor the traveling speed of the car 3 in a position in the vicinity of the intermediate floor.
- the first overspeed pattern V 1 is set to be higher than the ETS overspeed monitoring pattern V E .
- the second overspeed pattern V 2 is set to be higher than the first overspeed pattern V 1 .
- the first overspeed pattern V 1 and the second overspeed pattern V 2 are fixed at all heights in the hoistway 1.
- Fig. 3 is a block diagram showing functions of the ETS circuit portion 22 of Fig. 1 .
- the ETS circuit portion 22 has a speed detecting portion 31, a position calculating portion 32, an overspeed monitoring portion 33, and an inspection mode setting portion 34.
- the speed detecting portion 31 detects a running speed of the car 3 based on a signal from the speed governor encoder 18.
- the position calculating portion 32 calculates a position of the car 3 based on signals from the reference position sensors 23 to 26 and information on the speed of the car 3 which is obtained from the speed detecting portion 31.
- the overspeed monitoring portion 33 monitors whether or not the speed of the car 3 reaches a preset overspeed monitoring pattern, based on the information on the speed of the car 3 which is obtained from the speed detecting portion 31, information on the position of the car 3 which is obtained from the position calculating portion 32, and the overspeed monitoring pattern.
- a forcible slowdown command is output to the safety circuit portion 13 to open the relay circuit thereof.
- the inspection mode setting portion 34 sets a change in the overspeed monitoring pattern in the inspection mode.
- the ETS circuit portion 22 has a computer (not shown) having a calculation processing portion (a CPU), a storage portion (a ROM, a RAM, a hard disk, and the like), and signal input/output portions.
- the functions of the speed detecting portion 31, the position calculating portion 32, the overspeed monitoring portion 33, and the inspection mode setting portion 34, which are illustrated in Fig. 3 are realized by the computer of the ETS circuit portion 22.
- programs for realizing the functions of the speed detecting portion 31, the position calculating portion 32, the overspeed monitoring portion 33, and the inspection mode setting portion 34 are stored in the storage portion of the computer.
- the calculation processing portion Based on the programs, the calculation processing portion performs calculation processings regarding the functions of the speed detecting portion 31, the position calculating portion 32, the overspeed monitoring portion 33, and the inspection mode setting portion 34.
- the operation control portion 12 is constituted by a computer that is different from the computer of the ETS circuit portion 22.
- Fig. 4 is a graph showing a first example of the overspeed monitoring pattern in the inspection mode of the ETS circuit portion 22 of Fig. 1 .
- the overspeed monitoring pattern V E within a car slowdown section in a terminal portion of the hoistway 1 is directly shifted to an intermediate portion of a raising/lowering stroke of the car 3, so an inspective monitoring pattern V EC is set.
- the car 3 is caused to run within the hoistway 1 according to the normal speed pattern V 0 .
- the overspeed monitoring pattern has been changed, the running pattern of the car 3 during the inspection coincides with an inspection-time running pattern V 0C .
- the change in the overspeed monitoring pattern is set in the inspection mode, so an overspeed can be detected in the intermediate portion of the hoistway 1 even when the car 3 is caused to run at a rated speed. Consequently, the operation of inspecting the ETS circuit portion 22 can be performed with ease. There is no need to cause the car 3 to run at a speed higher than the rated speed in order to inspect the ETS circuit portion 22. Therefore, there is no need to increase the capacity of the motor portion of the drive device 7 only for the purpose of inspection.
- Fig. 5 is a graph showing a second example of the overspeed monitoring pattern in the inspection mode of the ETS circuit portion 22 of Fig. 1 .
- the overspeed monitoring pattern V E within the car slowdown section in the terminal portion of the hoistway 1 is shifted to a lower value than the normal mode, so an inspective monitoring pattern V EC is set.
- the operation of inspecting the ETS circuit portion 22 can also be performed with ease by setting the inspective monitoring pattern V EC , which is lower in speed than the overspeed monitoring pattern in the normal mode, in the inspection mode.
- Fig. 6 is a graph showing a third example of the overspeed monitoring pattern in the inspection mode of the ETS circuit portion 22 of Fig. 1 .
- the overspeed monitoring pattern V E within the car slowdown section in the terminal portion of the hoistway 1 is shifted by an arbitrary distance in a raising/lowering direction of the car 3, so an inspective monitoring pattern V EC is set.
- the inspective monitoring pattern V EC as described above also enables detection of an overspeed when the car 3 runs at a speed equal to or lower than the rated speed. As a result, the operation of inspecting the ETS circuit portion 22 can be performed with ease.
- Fig. 7 is a graph showing a fourth example of the overspeed monitoring pattern in the inspection mode of the ETS circuit portion 22 of Fig. 1 .
- the inspective monitoring pattern V EC is so set as to make an overspeed detecting level constant and equal to or lower than the rated speed regardless of the position within the hoistway 1.
- the inspective monitoring pattern V EC as described above also enables detection of an overspeed when the car 3 runs at a speed equal to or lower than the rated speed. As a result, the operation of inspecting the ETS circuit portion 22 can be performed with ease.
- Fig. 8 is a block diagram showing functions of the ETS circuit portion 22 of an elevator apparatus according to Embodiment 2 of the present invention.
- the elevator apparatus according to Embodiment 2 is different from the elevator apparatus according to Embodiment 1 only in the functional structure of the ETS circuit portion 22.
- the entire construction of the elevator apparatus according to Embodiment 2 is identical to that of the elevator apparatus according to Embodiment 1.
- the inspection mode setting portion 34 changes information on the position of the car 3, which is transmitted from the position calculating portion 32 to the overspeed monitoring portion 33. More specifically, in the inspection mode, the ETS circuit portion 22 fixes the information on the position of the car 3, which is transmitted from the position calculating portion 32 to the overspeed monitoring portion 33, to information indicating a predetermined fixed position within the car slowdown section without changing the overspeed monitoring pattern V E itself, as shown in, for example, Fig. 9 . That is, in the inspection mode, the speed of the car 3 is monitored on the assumption that the position of the car 3 is fixed to the fixed position, although the car 3 is actually running.
- the fixed position may be variable within the car slowdown section as circumstances demand.
- the inspection of the ETS circuit portion 22 can thereby be conducted a plurality of times as well while changing the fixed position.
- FIG. 10 is a block diagram showing an essential part of an elevator apparatus according to Embodiment 3.
- an automatic inspection command input portion 35 for inputting thereto a command to conduct the inspection of the ETS circuit portion 22 automatically is connected to the ETS circuit portion 22 and the operation control portion 12.
- an inspection mode setting command is input to the inspection mode setting portion 34 of the ETS circuit portion 22, and an inspective running pattern is input to the operation control portion 12.
- Embodiment 3 is identical to Embodiment 1 or 2 in other constructional details.
- the inspection of the ETS circuit portion 22, including the inspective running of the car 3 and the change in the setting of the ETS circuit portion 22, can be automatically conducted simply by inputting an inspection command to the automatic inspection command input portion 35.
- the burden cast on a maintenance worker or an installation operator during inspection can be lightened.
- the inspection mode setting command and the inspective running pattern may be input to the ETS circuit portion 22 and the operation control portion 12 respectively either at the same time or with a time difference.
- the inspective running pattern may be input to the operation control portion 12 as soon as a predetermined time elapses after the inspection mode setting command has been input to the ETS circuit portion 22.
- the car 3 may be caused to start running as soon as a predetermined time elapses after the inspective running pattern has been input to the operation control portion 12.
- two or more inspective running patterns may be input to the operation control portion 12.
- a running command according to a corresponding one of the inspective running patterns may be input to the operation control portion 12 after a command to move the car 3 to the initial position has been input to the operation control portion 12 and then an inspection mode setting command has been input to the ETS circuit portion 22.
- the automatic inspection command input portion 35 may be provided independently from the ETS circuit portion 22 and the operation control portion 12, but may also be provided as part of the ETS circuit portion 22 or the operation control portion 12.
- FIG. 11 is a block diagram showing an essential part of an elevator apparatus according to Embodiment 4 of the present invention.
- an interlock switch 36 is connected to the ETS circuit portion 22.
- a first switch 36a of the interlock switch 36 is closed, an inspection mode starting circuit is short-circuited, so the inspection mode setting portion 34 sets an inspection mode.
- the interlock switch 36 is provided with a second switch 36b, which is connected in series to the safety circuit portion 13.
- the second switch 36b is opened/closed in such a manner as to be interlocked with the opening/closing of the first switch 36a mechanically. More specifically, the second switch 36b is opened when the first switch 36a is closed. Accordingly, the safety circuit portion 13 is opened when the first switch 36a is closed.
- the inspection mode can be set with the car 3 stopped more reliably.
- An operator is allowed to perform an operation of inspecting the ETS circuit portion 22, which requires the operator to move onto the car 3 or into the hoistway 1, with the car 3 stopped more reliably.
- Figs. 12 and 13 are a block diagram showing a state of an essential part of an elevator apparatus according to Embodiment 5 during normal operation and a block diagram showing a state of the elevator apparatus of Fig. 12 in an inspection mode, respectively.
- the safety circuit portion 13 and the inspection mode starting circuit are selectively short-circuited using a jumper plug 37. That is, during a normal operation, while the safety circuit portion 13 is short-circuited by the jumper plug 37, the inspection mode starting circuit is open. On the other hand, in the inspection mode, while the inspection mode starting circuit is short-circuited by the jumper plug 37, the safety circuit portion 13 is open.
- the inspection mode can be set with the car 3 stopped more reliably.
- the operator is allowed to perform an operation of inspecting the ETS circuit portion 22, which requires the operator to move onto the car 3 or into the hoistway 1, with the car 3 stopped more reliably.
- Fig. 14 is a block diagram showing functions of the ETS circuit portion 22 of an elevator apparatus according to Embodiment 6.
- the ETS circuit portion 22 has the speed detecting portion 31, the position calculating portion 32, the overspeed monitoring portion 33, a floor stop position storing portion 38, a reference position storing portion 39, a relative position displaying portion 40, and a reference position displaying portion 41.
- a floor stop signal is transmitted from the operation control portion 12 to the floor stop position storing portion 38.
- Information on the position of the car 3, which has been calculated by the position calculating portion 32, is transmitted to the floor stop position storing portion 38.
- the floor stop position storing portion 38 thereby stores the position of the car 3 upon stoppage of the car 3 at the predetermined floor, which has been calculated by the position calculating portion 32.
- Reference position detection signals from the reference position sensors 23 to 26 and the information on the position of the car 3, which has been calculated by the position calculating portion 32, are transmitted to the reference position storing portion 39.
- the reference position storing portion 39 thereby stores the position of the car 3 upon passage of the car 3 past a reference position, which has been calculated by the position calculating portion 32.
- the relative position displaying portion 40 calculates a distance between two predetermined floors based on the information from the floor stop position storing portion 38, and causes a monitor (not shown) to display the distance as shown in, for example, Fig. 15 .
- the reference position displaying portion 41 calculates distances from a predetermined floor to the reference position sensors 23 to 26 based on the information from the floor stop position storing portion 38 and the reference position storing portion 39, and causes the monitor to display the distances as shown in, for example, Fig. 15 .
- the functions of the floor stop position storing portion 38, the reference position storing portion 39, the relative position displaying portion 40, and the reference position displaying portion 41 are realized by the computer of the ETS circuit portion 22.
- programs for realizing the functions of the floor stop position storing portion 38, the reference position storing portion 39, the relative position displaying portion 40, and the reference position displaying portion 41 are stored in the storage portion of the computer.
- the calculation processing portion Based on the programs, the calculation processing portion performs calculation processings regarding the functions of the floor stop position storing portion 38, the reference position storing portion 39, the relative position displaying portion 40, and the reference position displaying portion 41.
- an inter-floor distance calculating portion and a reference position calculating portion according to Embodiment 6 are constituted by the computer of the ETS circuit portion 22.
- a distance between predetermined floors which has been output from the relative position displaying portion 40, can be compared with an actual distance between floors of a building.
- the ETS circuit portion 22 correctly performs the function of calculating a relative distance.
- the functions of the floor stop position storing portion 38, the reference position storing portion 39, the relative position displaying portion 40, and the reference position displaying portion 41 are realized by the computer of the ETS circuit portion 22 in Embodiment 6, they may also be realized by a computer separated from the ETS circuit portion 22.
- the outputs from the relative position displaying portion 40 and the reference position displaying portion 41 may also be displayed on a monitoring panel installed in an administrative room of the building.
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Computer Networks & Wireless Communication (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
- Indicating And Signalling Devices For Elevators (AREA)
Abstract
a car (3) for being raised/lowered within a hoistway (1);
a brake portion (9) for braking raising/lowering of the car (3) ;
a safety circuit portion (13) for being opened to cause the brake portion (9) to perform a braking operation; and
an electronic overspeed detecting device (22), which has an overspeed monitoring pattern set to change continuously at least with respect to a position within a car slowdown section of a terminal portion of the hoistway, for monitoring whether or not a speed of the car reaches the overspeed monitoring pattern,
characterized in that:
the electronic overspeed detecting device (22) has operation modes including an inspection mode for inspecting the electronic overspeed detecting device (22) itself; and
the safety circuit portion (13) is opened in response to a switch in operation mode to the inspection mode.
Description
- The present invention relates to an elevator apparatus having an electronic overspeed detecting device for monitoring whether or not a speed of a car reaches an overspeed monitoring pattern.
- A speed detecting device of a conventional elevator apparatus employs a pulse disc composed of a first circular plate and a second circular plate that are superposed one on another. By changing the angle of superposition of the second circular plate with respect to the first circular plate, the number of effective through-holes of the pulse disc is changed. More specifically, during an inspective operation of checking whether or not the speed detecting device operates normally, the number of the effective through-holes is doubled, so a speed of a hoisting machine that is twice as high as a normal speed thereof is detected in a simulative manner (e. g. , see Patent Document 1).
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- Patent Document 1:
JP 05-338948 A - In the conventional elevator apparatus constructed as described above, when performing an operation of inspecting the speed detecting device, an operator needs to carry out a troublesome procedure of manually changing the angle of superposition of the second circular plate with respect to the first circular plate at a place where the speed detecting device is installed, namely, in a hoistway or a machinery room.
- The present invention has been made to solve the problem as described above, and it is therefore an object of the present invention to obtain an elevator apparatus allowing an operation of inspecting an electronic safety system including an electronic overspeed detecting device to be performed with ease.
- The elevator apparatus according to the present invention includes: a car for being raised/lowered within a hoistway; a brake portion for braking raising/lowering of the car; a safety circuit portion for being opened to cause the brake portion to perform a braking operation; and an electronic overspeed detecting device, which has an overspeed monitoring pattern set to change continuously at least with respect to a position within a car slowdown section of a terminal portion of the hoistway, for monitoring whether or not a speed of the car reaches the overspeed monitoring pattern, and in the elevator apparatus, the electronic overspeed detecting device has operation modes including an inspection mode for inspecting the electronic overspeed detecting device itself, and the safety circuit portion is opened in response to a switch in operation mode to the inspection mode.
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- [
Fig. 1 ] A structural diagram of an elevator apparatus according toEmbodiment 1 of the present invention. - [
Fig. 2 ] A graph of a pattern of overspeed set in speed governor and an ETS circuit portion ofFig. 1 . - [
Fig. 3 ] A block diagram showing functions of the ETS circuit portion ofFig. 1 . - [
Fig. 4 ] A graph showing a first example of an overspeed monitoring pattern in an inspection mode of the ETS circuit portion ofFig. 1 . - [
Fig. 5 ] A graph showing a second example of the overspeed monitoring pattern in the inspection mode of the ETS circuit portion ofFig. 1 . - [
Fig. 6 ] A graph showing a third example of the overspeed monitoring pattern in the inspection mode of the ETS circuit portion ofFig. 1 . - [
Fig. 7 ] A graph showing a fourth example of the overspeed monitoring pattern in the inspection mode of the ETS circuit portion ofFig. 1 . - [
Fig. 8 ] A block diagram showing functions of an ETS circuit portion of an elevator apparatus according toEmbodiment 2 of the present invention. - [
Fig. 9 ] A graph showing an example of an overspeed monitoring pattern in an inspection mode of the ETS circuit portion ofFig. 8 . - [
Fig. 10 ] A block diagram showing an essential part of an elevator apparatus according toEmbodiment 3 of the present invention. - [
Fig. 11 ] A block diagram showing an essential part of an elevator apparatus according toEmbodiment 4 of the present invention. - [
Fig. 12 ] A block diagram showing a state of an essential part of an elevator apparatus according toEmbodiment 5 of the present invention during normal operation. - [
Fig. 13 ] A block diagram showing a state of the elevator apparatus ofFig. 12 in an inspection mode. - [
Fig. 14 ] A block diagram showing functions of an ETS circuit portion of an elevator apparatus according toEmbodiment 6 of the present invention. - [
Fig. 15 ] A front view showing an example of a display screen according to a relative position displaying portion and a reference position displaying portion ofFig. 14 . - Preferred embodiments of the present invention will be hereinafter described with reference to the drawings.
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Fig. 1 is a structural diagram of an elevator apparatus according toEmbodiment 1 of the present invention. In the drawing, ahoistway 1 includes a pair ofcar guide rails 2 and a pair of counterweight guide rails (not shown) provided therein. Acar 3 is raised and lowered in thehoistway 1 while being guided by thecar guide rails 2. Acounterweight 4 is raised and lowered in thehoistway 1 while being guided by the counterweight guide rail. - Provided in a lower part of the
car 3 is asafety device 5 that engages with thecar guide rails 2 to stop thecar 3 in case of an emergency. Thesafety device 5 has a pair of braking pieces (wedge members) 6 that are moved by mechanical operation to be pushed against thecar guide rails 2. - In the upper part of the
hoistway 1, a driving apparatus (hoisting machine) 7 that raises and lowers thecar 3 and thecounterweight 4 via a main rope is provided. Thedriving apparatus 7 has: adrive sheave 8; a motor portion (not shown) that rotates thedrive sheave 8; abrake portion 9 that brakes the rotation of thedrive sheave 8; and amotor encoder 10 that generates a detection signal according to the rotation of thedrive sheave 8. - The
brake portion 9 is, for example, an electromagnetic brake apparatus. In the electromagnetic brake apparatus, a spring force of a braking spring is used to push a brake shoe against a braking surface to brake the rotation of thedrive sheave 8 and an electromagnetic magnet is excited to separate the brake shoe from the braking surface to cancel the braking. - An
elevator control panel 11 is provided, for example, in a lower part of thehoistway 1. Theelevator control panel 11 includes: anoperation control portion 12 that controls operation of thedriving apparatus 7; and a safety circuit portion (relay circuit portion) 13 that suddenly stops thecar 3 when the elevator has abnormality. Theoperation control portion 12 is input with a detection signal from themotor encoder 10. Based on the detection signal from themotor encoder 10, theoperation control portion 12 calculates the position and speed of thecar 3 to control thedriving apparatus 7. - When the relay circuit of the
safety circuit portion 13 is opened, an electric current to the motor portion of thedriving apparatus 7 is blocked and an electric current to the electromagnetic magnet of thebrake portion 9 is also blocked, whereby thedrive sheave 8 is braked. - In the upper part of the
hoistway 1, a speed governor (mechanical speed governor) 14 is provided. Thespeed governor 14 includes: aspeed governor sheave 15, anoverspeed detection switch 16, arope catch 17, and aspeed governor encoder 18 serving as a sensor. The speed governor sheave 15 is wound at aspeed governor rope 19. Both ends of thespeed governor rope 19 are connected to an operational mechanism of thesafety device 5. The lower end of thespeed governor rope 19 is wound around atension sheave 20 provided in the lower part of thehoistway 1. - When the
car 3 is raised or lowered, thespeed governor rope 19 is moved in circulation and thespeed governor sheave 15 is rotated at a rotation speed corresponding to a traveling speed of thecar 3. Thespeed governor 14 mechanically detects that the traveling speed of thecar 3 reaches an overspeed. Set as overspeeds to be detected are a first overspeed (OS speed) that is higher than a rated speed and a second overspeed (Trip speed) that is higher than the first overspeed. - When the traveling speed of the
car 3 reaches the first overspeed, theoverspeed detection switch 16 is operated. When theoverspeed detection switch 16 is operated, the relay circuit of thesafety circuit portion 13 is opened. When the traveling speed of thecar 3 reaches the second overspeed, the rope catch 17 grips the speed governor rope 19 to stop the circulation of thespeed governor rope 19. When the circulation of thespeed governor rope 19 is stopped, thesafety device 5 provides a braking operation. - The
speed governor encoder 18 generates a detection signal according to the rotation of thespeed governor sheave 15. Thespeed governor encoder 18 employs a dual sense type encoder that simultaneously outputs two types of detection signals, i.e., a first detection signal and a second detection signal. - The first detection signal and the second detection signal from the
speed governor encoder 18 are input to an ETS circuit portion 22 (electronic overspeed detection device) of an Emergency Terminal Slowdown apparatus (ETS apparatus) provided at anelectronic safety controller 21. TheETS circuit portion 22 detects, based on a detection signal from thespeed governor encoder 18, abnormality of an elevator and outputs a command signal for shifting the elevator to a safe state. More specifically, theETS circuit portion 22 calculates, independently from theoperation control portion 12, the traveling speed and a position of thecar 3 based on the signal from thespeed governor encoder 18, and monitors whether the traveling speed of thecar 3 reaches an overspeed monitoring pattern (overspeed detection level). The overspeed monitoring pattern is set to change continuously with respect to a position within a car slowdown section of a terminal portion of the hoistway. - The
ETS circuit portion 22 also converts the signal from thespeed governor encoder 18 to a digital signal to perform a digital calculation processing and determine whether the traveling speed of thecar 3 reaches an ETS monitoring overspeed. When theETS circuit portion 22 determines that the traveling speed of thecar 3 has reached the ETS monitoring overspeed, the relay circuit ofsafety circuit portion 13 is opened. - The
ETS circuit portion 22 can also detect abnormality of theETS circuit portion 22 itself and abnormality of thespeed governor encoder 18. When theETS circuit portion 22 detects abnormality of theETS circuit portion 22 itself or abnormality of thespeed governor encoder 18, a nearest floor stop command signal is output from theETS circuit portion 22 to theoperation control portion 12 as a command signal for shifting the elevator to a safe state. Interactive communication is also possible between theETS circuit portion 22 and theoperation control portion 12. - In predetermined positions in the
hoistway 1, there are provided first tofourth reference sensors 23 to 26 for detecting that thecar 3 is located at a reference position in the hoistway. Top and bottom terminal landing switches can be used for thereference sensors 23 to 26. Detection signals from thereference sensors 23 to 26 are input to theETS circuit portion 22. Based on the detection signals from thereference sensors 23 to 26, theETS circuit portion 22 corrects the information for the position of thecar 3 calculated in theETS circuit portion 22. - On a bottom face of the
hoistway 1, acar buffer 27 and acounterweight buffer 28 are provided. Thesebuffers -
Fig. 2 is a graph of overspeed patterns set in thespeed governor 14 and theETS circuit portion 22 ofFig. 1 . In the drawing, when thecar 3 travels at a normal speed (rated speed) from a bottom terminal landing to a top terminal landing, thecar 3 draws a normal speed pattern V0. Thespeed governor 14 is associated with a first overspeed pattern V1 and a second overspeed pattern V2 by a mechanical position adjustment. TheETS circuit portion 22 is associated with an ETS overspeed monitoring pattern VE. - The ETS overspeed monitoring pattern VE is set to be higher than the normal speed pattern V0. The ETS overspeed monitoring pattern VE is also set to have an equal interval from the normal speed pattern V0 in the entire ascending/descending process. In other words, the ETS overspeed monitoring pattern VE changes according to a car position. More specifically, the ETS overspeed monitoring pattern VE is set to be fixed in the vicinity of an intermediate floor and is set to continuously and smoothly decline, in the vicinity of a terminal landing, while being closer to an end of the hoistway 1 (upper end and lower end). In this manner, the
ETS circuit portion 22 monitors the traveling speed of thecar 3 not only in a position in the vicinity of terminal landings but also in a position in the vicinity of an intermediate floor (a fixed speed traveling zone in the normal speed pattern V0). However, theETS circuit portion 22 does not always have to monitor the traveling speed of thecar 3 in a position in the vicinity of the intermediate floor. - The first overspeed pattern V1 is set to be higher than the ETS overspeed monitoring pattern VE. The second overspeed pattern V2 is set to be higher than the first overspeed pattern V1. The first overspeed pattern V1 and the second overspeed pattern V2 are fixed at all heights in the
hoistway 1. -
Fig. 3 is a block diagram showing functions of theETS circuit portion 22 ofFig. 1 . TheETS circuit portion 22 has aspeed detecting portion 31, aposition calculating portion 32, anoverspeed monitoring portion 33, and an inspectionmode setting portion 34. Thespeed detecting portion 31 detects a running speed of thecar 3 based on a signal from thespeed governor encoder 18. Theposition calculating portion 32 calculates a position of thecar 3 based on signals from thereference position sensors 23 to 26 and information on the speed of thecar 3 which is obtained from thespeed detecting portion 31. - The
overspeed monitoring portion 33 monitors whether or not the speed of thecar 3 reaches a preset overspeed monitoring pattern, based on the information on the speed of thecar 3 which is obtained from thespeed detecting portion 31, information on the position of thecar 3 which is obtained from theposition calculating portion 32, and the overspeed monitoring pattern. When the speed of thecar 3 reaches an overspeed level of the overspeed monitoring pattern, a forcible slowdown command is output to thesafety circuit portion 13 to open the relay circuit thereof. - Included in operation modes of the
ETS circuit portion 22 are a normal mode and an inspection mode for inspecting theETS circuit portion 22 itself. In the inspection mode, the overspeed monitoring pattern can be changed. The inspectionmode setting portion 34 sets a change in the overspeed monitoring pattern in the inspection mode. - The
ETS circuit portion 22 has a computer (not shown) having a calculation processing portion (a CPU), a storage portion (a ROM, a RAM, a hard disk, and the like), and signal input/output portions. The functions of thespeed detecting portion 31, theposition calculating portion 32, theoverspeed monitoring portion 33, and the inspectionmode setting portion 34, which are illustrated inFig. 3 , are realized by the computer of theETS circuit portion 22. In other words, programs for realizing the functions of thespeed detecting portion 31, theposition calculating portion 32, theoverspeed monitoring portion 33, and the inspectionmode setting portion 34 are stored in the storage portion of the computer. Based on the programs, the calculation processing portion performs calculation processings regarding the functions of thespeed detecting portion 31, theposition calculating portion 32, theoverspeed monitoring portion 33, and the inspectionmode setting portion 34. - The
operation control portion 12 is constituted by a computer that is different from the computer of theETS circuit portion 22. -
Fig. 4 is a graph showing a first example of the overspeed monitoring pattern in the inspection mode of theETS circuit portion 22 ofFig. 1 . In the first example, the overspeed monitoring pattern VE within a car slowdown section in a terminal portion of thehoistway 1 is directly shifted to an intermediate portion of a raising/lowering stroke of thecar 3, so an inspective monitoring pattern VEC is set. In inspecting theETS circuit portion 22, thecar 3 is caused to run within thehoistway 1 according to the normal speed pattern V0. However, since the overspeed monitoring pattern has been changed, the running pattern of thecar 3 during the inspection coincides with an inspection-time running pattern V0C. - As described above, the change in the overspeed monitoring pattern is set in the inspection mode, so an overspeed can be detected in the intermediate portion of the
hoistway 1 even when thecar 3 is caused to run at a rated speed. Consequently, the operation of inspecting theETS circuit portion 22 can be performed with ease. There is no need to cause thecar 3 to run at a speed higher than the rated speed in order to inspect theETS circuit portion 22. Therefore, there is no need to increase the capacity of the motor portion of thedrive device 7 only for the purpose of inspection. -
Fig. 5 is a graph showing a second example of the overspeed monitoring pattern in the inspection mode of theETS circuit portion 22 ofFig. 1 . In the second example, the overspeed monitoring pattern VE within the car slowdown section in the terminal portion of thehoistway 1 is shifted to a lower value than the normal mode, so an inspective monitoring pattern VEC is set. - As described above, the operation of inspecting the
ETS circuit portion 22 can also be performed with ease by setting the inspective monitoring pattern VEC, which is lower in speed than the overspeed monitoring pattern in the normal mode, in the inspection mode. -
Fig. 6 is a graph showing a third example of the overspeed monitoring pattern in the inspection mode of theETS circuit portion 22 ofFig. 1 . In the third example, the overspeed monitoring pattern VE within the car slowdown section in the terminal portion of thehoistway 1 is shifted by an arbitrary distance in a raising/lowering direction of thecar 3, so an inspective monitoring pattern VEC is set. - The inspective monitoring pattern VEC as described above also enables detection of an overspeed when the
car 3 runs at a speed equal to or lower than the rated speed. As a result, the operation of inspecting theETS circuit portion 22 can be performed with ease. -
Fig. 7 is a graph showing a fourth example of the overspeed monitoring pattern in the inspection mode of theETS circuit portion 22 ofFig. 1 . In the fourth example, the inspective monitoring pattern VEC is so set as to make an overspeed detecting level constant and equal to or lower than the rated speed regardless of the position within thehoistway 1. - The inspective monitoring pattern VEC as described above also enables detection of an overspeed when the
car 3 runs at a speed equal to or lower than the rated speed. As a result, the operation of inspecting theETS circuit portion 22 can be performed with ease. - Reference will be made next to
Fig. 8 , which is a block diagram showing functions of theETS circuit portion 22 of an elevator apparatus according toEmbodiment 2 of the present invention. The elevator apparatus according toEmbodiment 2 is different from the elevator apparatus according toEmbodiment 1 only in the functional structure of theETS circuit portion 22. The entire construction of the elevator apparatus according toEmbodiment 2 is identical to that of the elevator apparatus according toEmbodiment 1. - In this example, during the inspection mode, the inspection
mode setting portion 34 changes information on the position of thecar 3, which is transmitted from theposition calculating portion 32 to theoverspeed monitoring portion 33. More specifically, in the inspection mode, theETS circuit portion 22 fixes the information on the position of thecar 3, which is transmitted from theposition calculating portion 32 to theoverspeed monitoring portion 33, to information indicating a predetermined fixed position within the car slowdown section without changing the overspeed monitoring pattern VE itself, as shown in, for example,Fig. 9 . That is, in the inspection mode, the speed of thecar 3 is monitored on the assumption that the position of thecar 3 is fixed to the fixed position, although thecar 3 is actually running. - Thus, the same state as in the case where the inspective monitoring pattern VEC is so set as to make the overspeed detecting level constant and equal to or lower than the rated speed regardless of the position within the
hoistway 1 is substantially established, so an overspeed can be detected when thecar 3 runs at a speed equal to or lower than the rated speed. As a result, the operation of inspecting theETS circuit portion 22 can be performed with ease. - The fixed position may be variable within the car slowdown section as circumstances demand. The inspection of the
ETS circuit portion 22 can thereby be conducted a plurality of times as well while changing the fixed position. - Reference will be made next to
Fig. 10 , which is a block diagram showing an essential part of an elevator apparatus according toEmbodiment 3. Referring toFig. 10 , an automatic inspectioncommand input portion 35 for inputting thereto a command to conduct the inspection of theETS circuit portion 22 automatically is connected to theETS circuit portion 22 and theoperation control portion 12. When the automatic inspection command is input to the automatic inspectioncommand input portion 35, an inspection mode setting command is input to the inspectionmode setting portion 34 of theETS circuit portion 22, and an inspective running pattern is input to theoperation control portion 12. - When the inspection mode setting command is input to the inspection
mode setting portion 34, the operation mode of theETS circuit portion 22 is switched to the inspection mode, so the change in setting as described inEmbodiment operation control portion 12, theoperation control portion 12 causes thecar 3 to run according to the inspective running pattern.Embodiment 3 is identical toEmbodiment - In the elevator apparatus constructed as described above, the inspection of the
ETS circuit portion 22, including the inspective running of thecar 3 and the change in the setting of theETS circuit portion 22, can be automatically conducted simply by inputting an inspection command to the automatic inspectioncommand input portion 35. In consequence, the burden cast on a maintenance worker or an installation operator during inspection can be lightened. - The inspection mode setting command and the inspective running pattern may be input to the
ETS circuit portion 22 and theoperation control portion 12 respectively either at the same time or with a time difference. For instance, the inspective running pattern may be input to theoperation control portion 12 as soon as a predetermined time elapses after the inspection mode setting command has been input to theETS circuit portion 22. Thecar 3 may be caused to start running as soon as a predetermined time elapses after the inspective running pattern has been input to theoperation control portion 12. - Furthermore, two or more inspective running patterns may be input to the
operation control portion 12. For example, in the case where an initial position of thecar 3 for inspection has been determined, a running command according to a corresponding one of the inspective running patterns may be input to theoperation control portion 12 after a command to move thecar 3 to the initial position has been input to theoperation control portion 12 and then an inspection mode setting command has been input to theETS circuit portion 22. - Still further, the automatic inspection
command input portion 35 may be provided independently from theETS circuit portion 22 and theoperation control portion 12, but may also be provided as part of theETS circuit portion 22 or theoperation control portion 12. - Reference will be made next to
Fig. 11 , which is a block diagram showing an essential part of an elevator apparatus according toEmbodiment 4 of the present invention. Referring toFig. 11 , aninterlock switch 36 is connected to theETS circuit portion 22. When afirst switch 36a of theinterlock switch 36 is closed, an inspection mode starting circuit is short-circuited, so the inspectionmode setting portion 34 sets an inspection mode. - The
interlock switch 36 is provided with asecond switch 36b, which is connected in series to thesafety circuit portion 13. Thesecond switch 36b is opened/closed in such a manner as to be interlocked with the opening/closing of thefirst switch 36a mechanically. More specifically, thesecond switch 36b is opened when thefirst switch 36a is closed. Accordingly, thesafety circuit portion 13 is opened when thefirst switch 36a is closed. - In the elevator apparatus constructed as described above, since the setting of an inspection mode and the opening of the
safety circuit portion 13 are carried out in an interlocking manner, the inspection mode can be set with thecar 3 stopped more reliably. An operator is allowed to perform an operation of inspecting theETS circuit portion 22, which requires the operator to move onto thecar 3 or into thehoistway 1, with thecar 3 stopped more reliably. - Reference will be made next to
Figs. 12 and13 , which are a block diagram showing a state of an essential part of an elevator apparatus according toEmbodiment 5 during normal operation and a block diagram showing a state of the elevator apparatus ofFig. 12 in an inspection mode, respectively. Referring toFigs. 12 and13 , thesafety circuit portion 13 and the inspection mode starting circuit are selectively short-circuited using ajumper plug 37. That is, during a normal operation, while thesafety circuit portion 13 is short-circuited by thejumper plug 37, the inspection mode starting circuit is open. On the other hand, in the inspection mode, while the inspection mode starting circuit is short-circuited by thejumper plug 37, thesafety circuit portion 13 is open. - Included in methods of inspecting the
ETS circuit portion 22 with thecar 3 stopped is the following method. First of all, information on the position of thecar 3, which is transmitted from theposition calculating portion 32 to thespeed calculating portion 33, is fixed according to the method described inEmbodiment 2. Then, thespeed governor rope 19 is temporarily removed from thespeed governor sheave 15. After that, thespeed governor sheave 15 is rotated using an electric drill or the like, so a signal corresponding to a rotational speed of thespeed governor sheave 15 is output from thespeed governor encoder 18. By conducting the inspection in this manner, a speed of thecar 3 can be detected by thespeed detecting portion 31 without actually causing thecar 3 to run. By looking at the manner in which the switch of thesafety circuit portion 13 operates when the speed of thecar 3 has exceeded the overspeed monitoring pattern VE, it becomes possible to confirm whether or not theETS circuit portion 22 operates correctly. - In the elevator apparatus constructed as described above, since the setting of the inspection mode and the opening of the
safety circuit portion 13 are carried out in an interlocking manner, the inspection mode can be set with thecar 3 stopped more reliably. The operator is allowed to perform an operation of inspecting theETS circuit portion 22, which requires the operator to move onto thecar 3 or into thehoistway 1, with thecar 3 stopped more reliably. - Reference will be made next to
Fig. 14 , which is a block diagram showing functions of theETS circuit portion 22 of an elevator apparatus according toEmbodiment 6. TheETS circuit portion 22 has thespeed detecting portion 31, theposition calculating portion 32, theoverspeed monitoring portion 33, a floor stopposition storing portion 38, a referenceposition storing portion 39, a relativeposition displaying portion 40, and a referenceposition displaying portion 41. - When the
car 3 stops at a predetermined floor, a floor stop signal is transmitted from theoperation control portion 12 to the floor stopposition storing portion 38. Information on the position of thecar 3, which has been calculated by theposition calculating portion 32, is transmitted to the floor stopposition storing portion 38. The floor stopposition storing portion 38 thereby stores the position of thecar 3 upon stoppage of thecar 3 at the predetermined floor, which has been calculated by theposition calculating portion 32. - Reference position detection signals from the
reference position sensors 23 to 26 and the information on the position of thecar 3, which has been calculated by theposition calculating portion 32, are transmitted to the referenceposition storing portion 39. The referenceposition storing portion 39 thereby stores the position of thecar 3 upon passage of thecar 3 past a reference position, which has been calculated by theposition calculating portion 32. - The relative
position displaying portion 40 calculates a distance between two predetermined floors based on the information from the floor stopposition storing portion 38, and causes a monitor (not shown) to display the distance as shown in, for example,Fig. 15 . - The reference
position displaying portion 41 calculates distances from a predetermined floor to thereference position sensors 23 to 26 based on the information from the floor stopposition storing portion 38 and the referenceposition storing portion 39, and causes the monitor to display the distances as shown in, for example,Fig. 15 . - The functions of the floor stop
position storing portion 38, the referenceposition storing portion 39, the relativeposition displaying portion 40, and the referenceposition displaying portion 41 are realized by the computer of theETS circuit portion 22. In other words, programs for realizing the functions of the floor stopposition storing portion 38, the referenceposition storing portion 39, the relativeposition displaying portion 40, and the referenceposition displaying portion 41 are stored in the storage portion of the computer. Based on the programs, the calculation processing portion performs calculation processings regarding the functions of the floor stopposition storing portion 38, the referenceposition storing portion 39, the relativeposition displaying portion 40, and the referenceposition displaying portion 41. - Accordingly, an inter-floor distance calculating portion and a reference position calculating portion according to
Embodiment 6 are constituted by the computer of theETS circuit portion 22. - In the elevator apparatus as described above, a distance between predetermined floors, which has been output from the relative
position displaying portion 40, can be compared with an actual distance between floors of a building. Thus, it is possible to easily check whether or not theETS circuit portion 22 correctly performs the function of calculating a relative distance. - A distance from a predetermined floor to a reference position, which has been output from the reference
position displaying portion 41, can be compared with a predetermined distance from the predetermined floor to the reference position, so it is possible to easily check whether or not thereference position sensors 23 to 26 are positioned correctly. In addition, since the position of thecar 3 upon passage thereof past the reference position has been obtained, it is also possible to easily check whether or not thereference position sensors 23 to 26 operate correctly. - Although the functions of the floor stop
position storing portion 38, the referenceposition storing portion 39, the relativeposition displaying portion 40, and the referenceposition displaying portion 41 are realized by the computer of theETS circuit portion 22 inEmbodiment 6, they may also be realized by a computer separated from theETS circuit portion 22. The outputs from the relativeposition displaying portion 40 and the referenceposition displaying portion 41 may also be displayed on a monitoring panel installed in an administrative room of the building. Thus, the function of calculating a relative distance and the functions of thereference position sensors 23 to 26 can be confirmed with ease from a remote place. -
- 1. An elevator apparatus, comprising an electronic overspeed detecting device (22), which has an overspeed monitoring pattern set to change continuously at least with respect to a position within a car slowdown section of a terminal portion of a hoistway, for monitoring whether or not a speed of a car reaches the overspeed monitoring pattern,
characterized in that:- the electronic overspeed detecting device (22) has operation modes including an inspection mode for inspecting the electronic overspeed detecting device (22) itself; and
- the overspeed monitoring pattern can be changed in the inspection mode.
- 2. The elevator apparatus according to
item 1, characterized in that the electronic overspeed detecting device (22) shifts the overspeed monitoring pattern for the car slowdown section toward an intermediate portion of a raising/lowering stroke of the car in the inspection mode. - 3. The elevator apparatus according to
item 1, characterized in that the electronic overspeed detecting device (22) shifts the overspeed monitoring pattern for the car slowdown section to a speed slower than that in a normal operation in the inspection mode. - 4. The elevator apparatus according to
item 1, characterized in that the electronic overspeed detecting device (22) can shift the overspeed monitoring pattern for the car slowdown section in a raising/lowering direction of the car (3) by an arbitrary distance in the inspection mode. - 5. The elevator apparatus according to
item 1, characterized in that the electronic overspeed detecting device (22) sets an overspeed detecting level to a value that is constant and equal to or lower than a rated speed regardless of a position within the hoistway (1) in the inspection mode. - 6. The elevator apparatus, comprising:
an electronic overspeed detecting device (22), which has an overspeed monitoring pattern set to change continuously at least with respect to a position within a car slowdown section of a terminal portion of a hoistway, for monitoring whether or not a speed of a car reaches the overspeed monitoring pattern,
characterized in that:
the electronic overspeed detecting device (22) has operation modes including an inspection mode for inspecting the electronic overspeed detecting device (22) itself; and the electronic overspeed detecting device (22) monitors the speed of the car on an assumption that a position of the car is fixed to a predetermined fixed position within the car slowdown section despite a running state of the car (3), in the inspection mode. - 7. The elevator apparatus according to
item 6, characterized in that the fixed position can be changed. - 8. The elevator apparatus according to any one of
items 1 to 7, further comprising an operation control portion (12) for controlling operation of the car (3),
characterized by further comprising
an automatic inspection command input portion (35) for inputting thereto a command to automatically conduct an inspection of the electronic overspeed detecting device (22),
an operation mode of the electronic overspeed detecting device (22) being switched to the inspection mode and the car (3) being automatically caused to start running according to an inspective running pattern by inputting an inspection command to the automatic inspection command input portion (35). - 9. The elevator apparatus according to
item 8, characterized in that the car (3) is automatically moved to an inspection starting position in a normal running state, an operation mode of the electronic overspeed detecting device (22) is then switched to the inspection mode, and the car (3) is caused to start running according to the inspective running pattern when the inspection command is input to the automatic inspection command input portion (35). - 10. An elevator apparatus, comprising:
- a car (3) for being raised/lowered within a hoistway (1);
- a brake portion (9) for braking raising/lowering of the car (3);
- a safety circuit portion (13) for being opened to cause the brake portion (9) to perform a braking operation; and
- an electronic overspeed detecting device (22), which has an overspeed monitoring pattern set to change continuously at least with respect to a position within a car slowdown section of a terminal portion of the hoistway, for monitoring whether or not a speed of the car reaches the overspeed monitoring pattern,
- the electronic overspeed detecting device (22) has operation modes including an inspection mode for inspecting the electronic overspeed detecting device (22) itself; and
- the safety circuit portion (13) is opened in response to a switch in operation mode to the inspection mode.
- 11. An elevator apparatus, comprising:
- a car (3) for being raised/lowered within a hoistway (1);
- an operation control portion (12) for controlling operation of the car (3); and
- an electronic overspeed detecting device (22), which has an overspeed monitoring pattern set to change continuously at least with respect to a position within a car slowdown section of a terminal portion of the hoistway, for monitoring whether or not a speed of the car reaches the overspeed monitoring pattern,
- a floor-to-floor calculating portion for storing a floor position upon stoppage of the car (3) at a floor, which has been calculated by the electronic overspeed detecting device (22), based on a floor stop signal transmitted from the operation control portion (12) upon stoppage of the car (3) at the floor and information on a position of the car which has been obtained by the electronic overspeed detecting device (22), and calculating a distance between predetermined floors.
- 12. An elevator apparatus, comprising:
- a car (3) for being raised/lowered within a hoistway (1);
- an operation control portion (12) for controlling operation of the car (3);
- an electronic overspeed detecting device (22), which has an overspeed monitoring pattern set to change continuously at least with respect to a position within a car slowdown section of a terminal portion of the hoistway, for monitoring whether or not a speed of the car reaches the overspeed monitoring pattern; and
- reference position sensors (23 to 26) each provided at a reference position within the hoistway (1), for inputting information indicating that the car (3) is located at the reference position into the electronic overspeed detecting device (22),
- a reference position calculating portion for storing a floor position upon stoppage of the car (3) at a floor, which has been calculated by the electronic overspeed detecting device (22), based on a floor stop signal transmitted from the operation control portion (12) upon stoppage of the car (3) at the floor and information on a position of the car which has been obtained by the electronic overspeed detecting device (22), storing a reference position at a time when the car (3) is located at the reference position, which has been calculated by the electronic overspeed detecting device (22), based on the information on the position of the car which has been obtained by the electronic overspeed detecting device (22) and information from the reference position sensors (23 to 26), and calculating a distance between a predetermined floor and the reference position.
Claims (1)
- An elevator apparatus, comprising:a car (3) for being raised/lowered within a hoistway (1);a brake portion (9) for braking raising/lowering of the car (3) ;a safety circuit portion (13) for being opened to cause the brake portion (9) to perform a braking operation; andan electronic overspeed detecting device (22), which has an overspeed monitoring pattern set to change continuously at least with respect to a position within a car slowdown section of a terminal portion of the hoistway, for monitoring whether or not a speed of the car reaches the overspeed monitoring pattern,characterized in that:the electronic overspeed detecting device (22) has operation modes including an inspection mode for inspecting the electronic overspeed detecting device (22) itself; andthe safety circuit portion (13) is opened in response to a switch in operation mode to the inspection mode.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP13179074.3A EP2660180B1 (en) | 2005-03-30 | 2005-03-30 | Overspeed detecting device for elevator apparatus with a safety interlock |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2005/006112 WO2006103769A1 (en) | 2005-03-30 | 2005-03-30 | Elevator apparatus |
EP13179074.3A EP2660180B1 (en) | 2005-03-30 | 2005-03-30 | Overspeed detecting device for elevator apparatus with a safety interlock |
EP05727801.2A EP1880967B1 (en) | 2005-03-30 | 2005-03-30 | Elevator apparatus |
Related Parent Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05727801.2A Division-Into EP1880967B1 (en) | 2005-03-30 | 2005-03-30 | Elevator apparatus |
EP05727801.2A Division EP1880967B1 (en) | 2005-03-30 | 2005-03-30 | Elevator apparatus |
EP05727801.2 Division | 2005-03-30 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2660180A1 true EP2660180A1 (en) | 2013-11-06 |
EP2660180B1 EP2660180B1 (en) | 2014-11-26 |
Family
ID=37053043
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05727801.2A Expired - Fee Related EP1880967B1 (en) | 2005-03-30 | 2005-03-30 | Elevator apparatus |
EP13179075.0A Expired - Fee Related EP2660181B1 (en) | 2005-03-30 | 2005-03-30 | Elevator apparatus with overspeed detection device and car position detection. |
EP13179074.3A Expired - Fee Related EP2660180B1 (en) | 2005-03-30 | 2005-03-30 | Overspeed detecting device for elevator apparatus with a safety interlock |
Family Applications Before (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05727801.2A Expired - Fee Related EP1880967B1 (en) | 2005-03-30 | 2005-03-30 | Elevator apparatus |
EP13179075.0A Expired - Fee Related EP2660181B1 (en) | 2005-03-30 | 2005-03-30 | Elevator apparatus with overspeed detection device and car position detection. |
Country Status (6)
Country | Link |
---|---|
EP (3) | EP1880967B1 (en) |
JP (1) | JP4930792B2 (en) |
CN (1) | CN1950286B (en) |
ES (2) | ES2526400T3 (en) |
PT (2) | PT2660180E (en) |
WO (1) | WO2006103769A1 (en) |
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CN101511716B (en) * | 2006-11-20 | 2013-05-01 | 三菱电机株式会社 | Elevator apparatus |
ATE456535T1 (en) * | 2007-05-24 | 2010-02-15 | Wittur Holding Gmbh | SPEED AND ACCELERATION MONITORING UNIT WITH ELECTRONICALLY CONTROLLED SERVO TRIGGER FOR USE FOR CONVEYOR EQUIPMENT |
JP2009215046A (en) * | 2008-03-12 | 2009-09-24 | Toshiba Elevator Co Ltd | Terminal floor forced reduction gear for elevator |
EP2380841A1 (en) * | 2009-01-21 | 2011-10-26 | Mitsubishi Electric Corporation | Elevator device |
JP5222833B2 (en) * | 2009-12-11 | 2013-06-26 | 株式会社日立製作所 | Electronic safety elevator |
EP2660179B1 (en) * | 2010-12-27 | 2020-12-16 | Mitsubishi Electric Corporation | Termination floor forced deceleration device for elevator |
WO2012127560A1 (en) * | 2011-03-18 | 2012-09-27 | 三菱電機株式会社 | Elevator device |
CN102431862B (en) * | 2011-09-30 | 2014-07-09 | 快意电梯股份有限公司 | Method for monitoring speed of high-speed elevator |
US9708157B2 (en) | 2012-02-03 | 2017-07-18 | Otis Elevator Company | Controlling speed of an elevator using a speed reducing switch and governor |
JP6272199B2 (en) * | 2014-09-26 | 2018-01-31 | 株式会社日立製作所 | Elevator apparatus and electronic safety system inspection method for elevator apparatus |
WO2016157369A1 (en) * | 2015-03-30 | 2016-10-06 | 三菱電機株式会社 | Control system for elevators |
CN109476450B (en) * | 2016-07-29 | 2020-07-07 | 三菱电机株式会社 | Control device for elevator |
EP3539913B1 (en) | 2018-03-16 | 2021-04-28 | Otis Elevator Company | Automatic rescue operation in an elevator system |
WO2020255193A1 (en) * | 2019-06-17 | 2020-12-24 | 三菱電機株式会社 | Terminal floor forced deceleration system for elevators |
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EP0628510A2 (en) * | 1993-06-08 | 1994-12-14 | Kone Oy | Procedure and apparatus for triggering the safety gear of an elevator |
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2005
- 2005-03-30 CN CN2005800148313A patent/CN1950286B/en active Active
- 2005-03-30 ES ES13179074.3T patent/ES2526400T3/en active Active
- 2005-03-30 EP EP05727801.2A patent/EP1880967B1/en not_active Expired - Fee Related
- 2005-03-30 EP EP13179075.0A patent/EP2660181B1/en not_active Expired - Fee Related
- 2005-03-30 PT PT131790743T patent/PT2660180E/en unknown
- 2005-03-30 ES ES05727801T patent/ES2530693T3/en active Active
- 2005-03-30 EP EP13179074.3A patent/EP2660180B1/en not_active Expired - Fee Related
- 2005-03-30 JP JP2007510293A patent/JP4930792B2/en active Active
- 2005-03-30 PT PT57278012T patent/PT1880967E/en unknown
- 2005-03-30 WO PCT/JP2005/006112 patent/WO2006103769A1/en not_active Application Discontinuation
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US4128141A (en) * | 1977-07-07 | 1978-12-05 | Westinghouse Electric Corp. | Elevator system |
GB2254170A (en) * | 1991-03-13 | 1992-09-30 | Thames Valley Lift Company Lim | Lift control system |
JPH05338948A (en) | 1992-06-02 | 1993-12-21 | Mitsubishi Electric Corp | Winch device for elevator |
EP0628510A2 (en) * | 1993-06-08 | 1994-12-14 | Kone Oy | Procedure and apparatus for triggering the safety gear of an elevator |
Also Published As
Publication number | Publication date |
---|---|
EP2660181B1 (en) | 2021-02-17 |
EP1880967B1 (en) | 2014-11-26 |
EP2660181A1 (en) | 2013-11-06 |
PT2660180E (en) | 2014-12-24 |
CN1950286B (en) | 2012-10-17 |
EP1880967A4 (en) | 2013-06-12 |
JP4930792B2 (en) | 2012-05-16 |
EP2660180B1 (en) | 2014-11-26 |
ES2530693T3 (en) | 2015-03-04 |
PT1880967E (en) | 2014-12-31 |
EP1880967A1 (en) | 2008-01-23 |
WO2006103769A1 (en) | 2006-10-05 |
ES2526400T3 (en) | 2015-01-12 |
CN1950286A (en) | 2007-04-18 |
JPWO2006103769A1 (en) | 2008-09-04 |
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