WO2012042660A1 - エレベータの運転モード切替システム - Google Patents
エレベータの運転モード切替システム Download PDFInfo
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- WO2012042660A1 WO2012042660A1 PCT/JP2010/067226 JP2010067226W WO2012042660A1 WO 2012042660 A1 WO2012042660 A1 WO 2012042660A1 JP 2010067226 W JP2010067226 W JP 2010067226W WO 2012042660 A1 WO2012042660 A1 WO 2012042660A1
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- operation mode
- maintenance
- car
- landing door
- switch
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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
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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
- B66B5/0087—Devices facilitating maintenance, repair or inspection tasks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B13/00—Doors, gates, or other apparatus controlling access to, or exit from, cages or lift well landings
- B66B13/02—Door or gate operation
- B66B13/14—Control systems or devices
- B66B13/16—Door or gate locking devices controlled or primarily controlled by condition of cage, e.g. movement or position
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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
- B66B5/005—Safety of maintenance personnel
Definitions
- This invention relates to an elevator operation mode switching system for switching an operation mode during maintenance work.
- the maintenance staff gets on the car and performs maintenance work on the hoisting machine and the control device.
- the maintenance staff enters the hoistway pit and performs maintenance work for the hoisting machine and the control device.
- an overshoot limit switch is provided above and below the hoistway to prevent the car from moving beyond the overshoot limit switch during maintenance operation. ing. Further, when a maintenance person enters the pit, a switch or the like provided at the landing is operated in advance so that the car does not operate before entering the pit.
- the operation mode is automatically switched from the normal operation mode to the maintenance operation mode (see, for example, Patent Document 1).
- the present invention has been made to solve the above-described problems, and is an elevator that can more reliably prevent maintenance personnel from entering the hoistway in the normal operation mode with a simple configuration.
- the purpose is to obtain an operation mode switching system.
- An elevator operation mode switching system is a system that is provided in an elevator having a plurality of landing door switches that detect opening and closing of a plurality of landing doors, and switches an operation mode during maintenance work.
- a maintenance operation mode switch for switching the operation mode to the maintenance operation mode a landing door opening detection switch that is provided on the landing door separately from the landing door switch and is blocked when the landing door is artificially opened.
- the landing door open detection switch When the landing door open detection switch is shut off, it is demagnetized and is equipped with a normal operation blocking relay that prevents the car from starting, and the maintenance operation mode is switched after the car is blocked from starting by the normal operation blocking relay during maintenance.
- An elevator operation mode switching system is provided in an elevator including a plurality of landing door switches that detect opening and closing of a plurality of landing doors, and a car gate switch that detects opening and closing of a car door.
- the maintenance operation mode changeover switch operates after the car is prevented from starting by the normal operation prevention relay during maintenance. By switching the over-de maintenance operation mode, the maintenance operation of the car is made possible.
- the normal operation blocking relay at the time of maintenance is demagnetized and the start of the car is temporarily blocked, and thereafter the operation mode is switched by the maintenance operation mode switching switch.
- the maintenance operation mode By switching to the maintenance operation mode, the maintenance operation of the car becomes possible, so that it is possible to more reliably prevent maintenance personnel from entering the hoistway in the normal operation mode with a simple configuration.
- FIG. 1 It is a block diagram which shows the machine room less type elevator by Embodiment 1 of this invention. It is a front view which shows the landing door of FIG. It is a rear view which expands and shows the principal part of the landing door 5 of FIG. It is a circuit diagram which shows the operation mode switching system of the elevator of FIG. It is a circuit diagram which shows the operation mode switching system of the elevator by Embodiment 2 of this invention. It is a circuit diagram which shows the operation mode switching system of the elevator by Embodiment 3 of this invention.
- FIG. 1 is a block diagram showing a machine room-less type elevator according to Embodiment 1 of the present invention.
- a hoisting machine 2 is installed in the lower part of the hoistway 1.
- the hoisting machine 2 includes a drive sheave, a hoisting motor that rotates the driving sheave, and a hoisting machine brake that brakes the rotation of the driving sheave.
- Suspension means (not shown) is wound around the drive sheave.
- As the suspension means a plurality of ropes or a plurality of belts are used.
- the car 3 and the counterweight (not shown) are suspended in the hoistway 1 by suspension means and are raised and lowered by the hoisting machine 2.
- An elevator control device (control panel) 4 that controls the hoisting machine 2 is installed in the lower part of the hoistway 1. The operation of the car 3 is controlled by the elevator control device 4.
- the landing doorway on each floor is opened and closed by a pair of landing doors 5 (FIG. 2).
- the landing door 5 on each floor is provided with a landing door switch 6 for detecting the open state of the landing door 5.
- the lowermost landing door opening detection switch 7 is provided on the lowermost landing door 5.
- the lowest floor landing door opening detection switch 7 is provided only on the lowest floor landing door 5 and detects that the lowest floor landing door 5 has been artificially opened.
- a normal floor landing door opening detection switch 8 is provided on each of the landing doors 5 on floors other than the lowest floor.
- the normal floor landing door opening detection switch 8 detects that the landing door 5 on the floor other than the lowest floor has been artificially opened.
- the in-pit maintenance operation mode changeover switch 9 and the in-pit maintenance operation mode switch 10 are arranged close to each other and are electrically connected to the elevator control device 4.
- a first reset switch 11 for resetting the operation mode and returning the operation mode to the normal operation mode is provided at the lowest floor hall.
- a landing on a predetermined floor (for example, the second floor) other than the lowest floor is provided with a second reset switch 12 for resetting the operation mode and returning the operation mode to the normal operation mode.
- the reset switches 11 and 12 are electrically connected to the elevator control device 4.
- the car doorway is opened and closed by a car door 13.
- the landing door 5 on that floor is opened and closed in conjunction with the car door 13.
- a door operator 14 for controlling the opening and closing of the car door 13 is provided.
- the door operator 14 is provided with a car maintenance operation mode switching switch 15 for switching the operation mode to the maintenance operation mode, and a car maintenance operation device 16 for operating the car 3 in the maintenance operation mode.
- the on-car maintenance operation mode switch 15 and the on-car maintenance operation device 16 are arranged close to each other and are electrically connected to the elevator control device 4.
- the in-pit maintenance operation mode switching switch 9, the in-pit maintenance operation device 10, the on-car maintenance operation mode switching switch 15, and the on-car maintenance operation device 16 are all arranged in the hoistway 1. For this reason, in order to operate these, the maintenance person artificially opens the landing door 5 and enters the hoistway 1.
- the car door 13 is provided with a car gate switch 17 for detecting the open state of the car door 13.
- a maintenance operation lower limit switch 18 is provided at the lower part of the hoistway 1 to restrict the lowering of the car 3 during the maintenance operation.
- a maintenance operation upper limit switch 19 is provided at the upper part in the hoistway 1 to limit the rise of the car 3 during the maintenance operation.
- the car 3 is provided with a cam 20 for operating the limit switches 18 and 19.
- FIG. 2 is a front view showing the landing door 5 of FIG. 1
- FIG. 3 is a rear view (viewed from inside the hoistway 1) showing an enlarged main part of the landing door 5 of FIG.
- a latch 21 is fixed to the upper part of the landing entrance.
- a hook portion 21 a is provided at one end of the latch 21.
- a latch 22 is swingably attached to the upper part of the landing door 5.
- An engaging portion 22 a is provided at the distal end portion of the latch 22. When the landing door 5 is in the fully closed state, the engaging portion 22a engages with the hook portion 21a, thereby preventing the landing door 5 from moving in the door opening direction.
- the landing door switch 6 is disposed in the vicinity of the latch 21 at the upper part of the landing doorway, and is operated by swinging the latch 22.
- the interlock device 23 includes a latch 21, a latch 22, and a landing door switch 6.
- the landing door opening detection switches 7 and 8 are provided on the back surface of the landing door 5.
- An unlocking member 24 for manually unlocking the interlock device 23 is swingably attached to the back surface of the landing door 5.
- the landing door 5 is provided with an unlocking key hole 5a into which an unlocking key (not shown) for swinging the unlocking member 24 is inserted.
- the unlocking member 24 is connected to the latch 22 via a connecting wire 25 and a connecting plate 26.
- the maintenance staff swings the unlocking member 24 in the clockwise direction of FIG. 3 using the unlocking key, whereby the end of the latch 22 on the side of the non-engagement portion 22a is pulled down, and the latch 22 is It is swung clockwise in FIG. Thereby, the engagement state of the latch 22 and the latch 21 is manually released.
- the landing door opening detection switches 7 and 8 are disposed in the vicinity of the unlocking member 24 and are operated by swinging of the unlocking member 24. Even if the latch 22 is swung by the engagement device on the car 3 side during normal operation, the swing is not transmitted to the unlocking member 24. Accordingly, the landing door opening detection switches 7 and 8 detect only artificial opening of the landing door 5.
- FIG. 4 is a circuit diagram showing the elevator operation mode switching system of FIG.
- the first to fourth reset relays 31 to 34 (PRSTA, CRSTA, PRSTB, CRSTB) are connected in parallel to each other.
- the first and third reset relays 31 and 33 are relays for resetting the normal operation blocking state during maintenance in the pit 1a.
- the second and fourth reset relays 32 and 34 are relays for resetting the normal operation blocking state during maintenance on the car 3.
- the first reset relay 31 is connected in series to the first reset switch 11 and interlocks with the first reset switch 11.
- the second reset relay 32 is connected in series to the second reset switch 12 and interlocks with the second reset switch 12.
- the third and fourth reset relays 33 and 34 are relays for confirming that all the landing doors 5 are closed.
- a normal operation blocking relay 35 (INSC) for maintenance on the car and a normal operation blocking relay 36 (INSP) for maintenance in the pit are connected to the battery 37 in parallel with each other.
- HLS-T Normally closed contact of normal floor landing door open detection switch 8 on the top floor
- HLS-M Normally closed contact of normal floor landing door open detection switch 8 on the middle floor (only one is shown in FIG. 4 for simplicity)
- HLS-B Normally closed contact of the lowest floor landing door open detection switch 7
- DS-T Contact point of landing door switch 6 on the top floor
- DS-M Contact point of landing door switch 6 on the middle floor (only one is shown in FIG. 4 for simplicity)
- DS-B Contact point of landing door switch 6 on the lowest floor
- the normal operation blocking relay 35 at the time of maintenance on the car is connected in series to the normally closed contact of the normal floor landing door open detection switch 8. For this reason, the normal operation blocking relay 35 during car maintenance is released when the landing door 5 other than the lowest floor is artificially opened.
- the normal operation blocking relay 35 is demagnetized during maintenance on the car, the car 3 is prevented from starting. Further, the normal operation blocking relay 35 during maintenance on the car can be turned on only when the relay contacts of the second and fourth reset relays 32 and 34 are closed.
- the normal operation blocking relay 36 during maintenance in the pit is connected in series with the normally closed contact of the lowermost landing door opening detection switch 7. For this reason, the normal operation blocking relay 36 during maintenance in the pit is released when the lowermost landing door 5 is artificially opened. When the normal operation blocking relay 36 is demagnetized during maintenance in the pit, the car 3 is prevented from starting. Further, the normal operation blocking relay 36 during maintenance in the pit can be turned on only when the relay contacts of the first and third reset relays 31 and 33 are closed.
- the fourth reset relay 34 is connected in series to the contact point of the landing door switch 6. When the second reset relay 32 is excited and all the contacts of the landing door switch 6 are closed, that is, when all the landing doors 5 are closed, the fourth reset relay 34 is excited. However, at this time, when the first reset switch 11 on the lowest floor is turned on, the fourth reset relay 34 is configured not to be excited.
- the third reset relay 33 is connected in series with the contact of the landing door switch 6. When the first reset relay 31 is excited and all the contacts of the landing door switch 6 are closed, that is, when all the landing doors 5 are closed, the third reset relay 33 is excited. However, at this time, the third reset relay 33 is configured not to be excited when the second reset switch 12 is turned on.
- the normal operation blocking relays 35 and 36 for maintenance are excited only when the reset switches 11 and 12 are turned on at the landing when all the landing doors 5 are closed and not in the maintenance operation mode.
- the normal operation blocking relays 35 and 36 at the time of maintenance are configured so as to be held by their own contacts and always excited unless the landing door 5 is artificially opened.
- the circuit including the landing door open detection switches 7 and 8 and the normal operation blocking relays 35 and 36 for maintenance is configured to be backed up by the battery 37 even when the power is interrupted or the power is shut off. When this occurs, it is possible to prevent the elevator from being kept from being blocked when the relays 35 and 36 are cut off to recover from a power failure.
- the operation switches (UP, DN) of the maintenance operation device 10 in the pit each have two contact points, one system is connected to a power supply line to the elevator control device 4, and the other system is the elevator control device 4. Is connected to the ascending operation command signal and the descending operation command signal.
- the maintenance staff When the maintenance work is completed, the maintenance staff returns the in-pit maintenance operation mode switching switch 9 to the normal operation (AUTO) side, and moves from the pit 1a to the lowest floor landing. Then, the first reset switch 11 is operated in a state where all the landing doors 5 and the car doors 13 are closed. As a result, the operation mode is returned to the normal operation mode.
- AUTO normal operation
- the elevator controller 4 is only operated when the operation switches (UP, DN) of the on-car maintenance operation device 16 are operated. Power is supplied, and the maintenance operation of the car 3 becomes possible.
- the operation switches (UP, DN) of the car maintenance operation device 16 each have two systems of contacts, one system is connected to the power supply line to the elevator control device 4, and the other system is the elevator control device 4. Is connected to the ascending operation command signal and the descending operation command signal.
- the maintenance staff When the maintenance work is completed, the maintenance staff returns the car maintenance operation mode changeover switch 15 to the normal operation (AUTO) side and moves from the car to the landing. Then, the second reset switch 12 is operated with all the landing doors 5 and the car doors 13 being closed. As a result, the operation mode is returned to the normal operation mode.
- AUTO normal operation
- Such an elevator operation mode switching system can more reliably prevent maintenance personnel from entering the hoistway 1 in the normal operation mode with a simple configuration.
- FIG. 5 is a circuit diagram showing an elevator operation mode switching system according to Embodiment 2 of the present invention.
- the reset circuit of the normal operation blocking relay 35 during maintenance on the car and the reset circuit of the normal operation blocking relay 36 during maintenance in the pit are common.
- the first reset relay 38 is a relay for resetting the normal operation blocking state during maintenance, and is interlocked with the first and second reset switches 11 and 12.
- the second reset relay 39 is a relay for confirming that all the landing doors 5 are closed. Other configurations are the same as those in the first embodiment.
- RSTA Relay contact of the first reset relay 38
- RSTB Relay contact of the second reset relay 39
- the reset circuit of the normal operation blocking relay 35 during maintenance on the car and the reset circuit of the normal operation blocking relay 36 during maintenance in the pit are common, so the configuration is simple. Yes, by operating any one of the reset switches 11 and 12, the elevator can be returned from the unstartable state.
- the landing door opening detection switches 7 and 8 are not necessarily provided on all floors. For example, when the maintenance work is performed only in the pit 1a and the lower floor landing door 5 is always opened and moved into the pit 1a, only the lowermost floor door opening detection switch 7 is provided. In this case, relays and switches related to maintenance work on the car 3 are omitted. On the contrary, when the maintenance work is performed only on the car 3, the lowest floor landing door opening detection switch 7 can be omitted. There is also a method of restricting movement to the car 3 only from a specific floor and providing a normal floor landing door opening detection switch 8 only on that floor.
- FIG. 6 is a circuit diagram showing an elevator operation mode switching system according to Embodiment 3 of the present invention.
- the microcomputer (determination unit) 41 includes operation circuits for the normal operation blocking relay 35 for car maintenance and the normal operation blocking relay 36 for in-pit maintenance.
- the gate switch relay 42 is turned on and off by the microcomputer 41 as the car gate switch 17 is opened and closed.
- the landing door switch relay 43 is turned on and off by the microcomputer 41 according to the opening and closing of the landing door switch 6.
- the normally open contact (GSR) of the gate switch relay 42 and the normally open contact (DSR) of the landing door switch relay 43 are connected in series to the power supply line of the elevator control device 4.
- the landing door 5 is artificially opened using the landing door opening detection switches 7 and 8.
- the maintenance-time normal operation blocking relays 35 and 36 are operated by the microcomputer 41, only the landing door 5 is provided due to the consistency between the landing door switch 6 and the car gate switch 17. It is determined that it has been opened artificially, and the normal operation blocking relays 35 and 36 are shut off during maintenance.
- the normal operation blocking relay 36 at the time of maintenance in the pit is cut off. Further, when it is detected that the landing door switch 6 on the floor other than the lowest floor is opened even though the car gate switch 17 is closed, the normal operation blocking relay 35 at the time of car maintenance is cut off.
- the normal operation blocking relays 35 and 36 at the time of maintenance are reset when a reset switch signal is input with all the doors 5 and 13 closed. Furthermore, the circuit including the microcomputer 41 and the normal operation blocking relays 35 and 36 at the time of maintenance is configured to be backed up by the battery 37 at the time of power failure and power interruption. Other configurations are the same as those in the first embodiment.
- Such an elevator operation mode switching system can also more reliably prevent maintenance personnel from entering the hoistway 1 in the normal operation mode with a simple configuration. Further, even when maintenance work is performed simultaneously in the pit 1a and on the car 3, the car 3 does not move in a state unexpected by maintenance personnel.
- the car 3 when maintenance work is performed simultaneously in both the pit 1a and on the car 3, the car 3 can be operated for maintenance if it is simultaneously operated in the same direction.
- the start of the car 3 is blocked by both the blocking relay 35 and the normal operation blocking relay 36 during maintenance in the pit, neither the operation of the maintenance driving apparatus 10 in the pit nor the operation of the maintenance driving apparatus 16 on the car is accepted.
- It can also be configured.
- a machine room-less type elevator is shown.
- the present invention can be applied to an elevator with a machine room as long as the elevator performs maintenance work in the hoistway.
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Abstract
Description
また、この発明に係るエレベータの運転モード切替システムは、複数の乗場ドアの開閉を検出する複数の乗場ドアスイッチと、かごドアの開閉を検出するかごゲートスイッチとを備えたエレベータに設けられ、保守作業時に運転モードを切り替えるシステムであって、昇降路内に設けられ、運転モードを保守運転モードに切り替えるための保守運転モード切替スイッチ、消磁されることにより、かごの起動を阻止する保守時通常運転阻止リレー、及び乗場ドアスイッチとかごゲートスイッチとの整合性により、かごドアが閉じたままで乗場ドアが人為的に開放されたことを判定し、保守時通常運転阻止リレーを消磁する判定部を備え、保守時通常運転阻止リレーにより前記かごの起動が阻止された後、前記保守運転モード切替スイッチで運転モードを保守運転モードに切り替えることにより、前記かごの保守運転が可能となる。
実施の形態1.
図1はこの発明の実施の形態1による機械室レスタイプのエレベータを示す構成図である。図において、昇降路1内の下部には、巻上機2が設置されている。巻上機2は、駆動シーブと、駆動シーブを回転させる巻上機モータと、駆動シーブの回転を制動する巻上機ブレーキとを有している。駆動シーブには、懸架手段(図示せず)が巻き掛けられている。懸架手段としては、複数本のロープ又は複数本のベルトが用いられている。
PRSTA:第1のリセットリレー31のリレー接点
CRSTA:第2のリセットリレー32のリレー接点
PRSTB:第3のリセットリレー33のリレー接点
CRSTB:第4のリセットリレー34のリレー接点
INSC:かご上保守時通常運転阻止リレー35のリレー接点
INSP:ピット内保守時通常運転阻止リレー36のリレー接点
HLS-M:中間階の通常階乗場ドア開放検出スイッチ8の常閉接点(図4では、簡単のため1つのみ示している)
HLS-B:最下階乗場ドア開放検出スイッチ7の常閉接点
DS-M:中間階の乗場ドアスイッチ6の接点(図4では、簡単のため1つのみ示している)
DS-B:最下階の乗場ドアスイッチ6の接点
TLS:保守運転上部リミットスイッチ19の接点
BLS:保守運転下部リミットスイッチ18の接点
次に、図5はこの発明の実施の形態2によるエレベータの運転モード切替システムを示す回路図である。この実施の形態2では、かご上保守時通常運転阻止リレー35のリセット回路と、ピット内保守時通常運転阻止リレー36のリセット回路とが共通になっている。
RSTA:第1のリセットリレー38のリレー接点
RSTB:第2のリセットリレー39のリレー接点
次に、図6はこの発明の実施の形態3によるエレベータの運転モード切替システムを示す回路図である。この実施の形態3では、かご上保守時通常運転阻止リレー35及びピット内保守時通常運転阻止リレー36の操作回路がマイクロコンピュータ(判定部)41により構成されている。
また、上記の例では、機械室レスタイプのエレベータを示したが、昇降路内で保守作業を行うエレベータであれば、機械室付きのエレベータにもこの発明は適用できる。
Claims (8)
- 複数の乗場ドアの開閉を検出する複数の乗場ドアスイッチを備えたエレベータに設けられ、保守作業時に運転モードを切り替えるエレベータの運転モード切替システムであって、
昇降路内に設けられ、運転モードを保守運転モードに切り替えるための保守運転モード切替スイッチ、
前記乗場ドアスイッチとは別に前記乗場ドアに設けられ、前記乗場ドアが人為的に開かれたときに遮断される乗場ドア開放検出スイッチ、及び
前記乗場ドア開放検出スイッチが遮断されると消磁され、前記かごの起動を阻止する保守時通常運転阻止リレー
を備え、
前記保守時通常運転阻止リレーにより前記かごの起動が阻止された後、前記保守運転モード切替スイッチで運転モードを保守運転モードに切り替えることにより、前記かごの保守運転が可能となることを特徴とするエレベータの運転モード切替システム。 - 前記昇降路内の前記保守運転モード切替スイッチの近傍には、保守作業時に前記かごを手動で運転するための保守運転装置が配置されていることを特徴とする請求項1記載のエレベータの運転モード切替システム。
- 乗場に設けられ、運転モードを通常運転モードに戻すためのリセットスイッチをさらに備え、
前記保守運転モード切替スイッチが通常運転モード側に戻され、かつ、前記乗場ドアスイッチの状態により、全ての前記乗場ドアが閉じられていることが検出された状態で、前記リセットスイッチが操作されたときに、通常運転モードでの前記かごの運転が可能となることを特徴とする請求項1記載のエレベータの運転モード切替システム。 - 前記保守運転モード切替スイッチは、前記昇降路のピットに設けられており、
前記乗場ドア開放検出スイッチは、最下階の前記乗場ドアに設けられていることを特徴とする請求項1記載のエレベータの運転モード切替システム。 - 前記保守運転モード切替スイッチは、前記かご上に設けられており、
前記乗場ドア開放検出スイッチは、最下階以外の階の前記乗場ドアに設けられていることを特徴とする請求項1記載のエレベータの運転モード切替システム。 - 前記保守運転モード切替スイッチは、前記昇降路のピットに設けられたピット内保守運転モード切替スイッチと、前記かご上に設けられたかご上保守運転モード切替スイッチとを含み、
前記保守運転装置は、前記ピットに設けられたピット内保守運転装置と、前記かご上に設けられたかご上保守運転装置とを含み、
前記乗場ドア開放検出スイッチは、最下階の前記乗場ドアに設けられた最下階乗場ドア開放検出スイッチと、最下階以外の前記乗場ドアに設けられた通常階乗場ドア開放検出スイッチとを含み、
前記保守時通常運転阻止リレーは、前記最下階乗場ドア開放検出スイッチに対応するピット内保守時通常運転阻止リレーと、前記通常階乗場ドア開放検出スイッチに対応するかご上保守時通常運転阻止リレーとを含み、
前記ピット内保守時通常運転阻止リレー及び前記かご上保守時通常運転阻止リレーの両方により前記かごの起動が阻止された場合、前記ピット内保守運転装置及び前記かご上保守運転装置が同時に同方向へ操作された場合のみ、前記かごの保守運転が可能となることを特徴とする請求項2記載のエレベータの運転モード切替システム。 - 前記乗場ドア開放検出スイッチ及び前記保守時通常運転阻止リレーを含む回路は、停電時及び電源遮断時もバッテリーにより電源バックアップされるように構成されていることを特徴とする請求項1記載のエレベータの運転モード切替システム。
- 複数の乗場ドアの開閉を検出する複数の乗場ドアスイッチと、かごドアの開閉を検出するかごゲートスイッチとを備えたエレベータに設けられ、保守作業時に運転モードを切り替えるエレベータの運転モード切替システムであって、
昇降路内に設けられ、運転モードを保守運転モードに切り替えるための保守運転モード切替スイッチ、
消磁されることにより、前記かごの起動を阻止する保守時通常運転阻止リレー、及び
前記乗場ドアスイッチと前記かごゲートスイッチとの整合性により、前記かごドアが閉じたままで前記乗場ドアが人為的に開放されたことを判定し、前記保守時通常運転阻止リレーを消磁する判定部
を備え、
前記保守時通常運転阻止リレーにより前記かごの起動が阻止された後、前記保守運転モード切替スイッチで運転モードを保守運転モードに切り替えることにより、前記かごの保守運転が可能となることを特徴とするエレベータの運転モード切替システム。
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