JP2000233877A - Maintenance device and maintenance method for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform a maintenance work in a place, where the maintenance work can be performed by providing the maintenance equipment of a hoist in a place separated from the hoist and control board set within an elevator shaft for raising and lowering a car where the maintenance work can be performed. SOLUTION: A maintenance control board 12 is embedded in the back of a first floor hall control board 1B, and a main circuit wire 13a is bypassed and led to the maintenance control board 12. At maintenance, the first floor hall control board 1B is removed, and the maintenance control board 12 is exposed and laid in operable state. A current measuring probe and a voltmeter are engaged with the main circuit wire 13a to measure the current and voltage of the main circuit wire 13a. According to this, the voltage measurement and current measurement of an electric motor 9a can be performed without entering an elevator shaft 1. Namely, the maintenance work of a hoist 9 can be performed without entering the elevator shaft 1, depending on the situation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to maintenance of an elevator in which a hoist and a control panel are installed in a hoistway.

[0002]

2. Description of the Related Art With regard to maintenance work in a pit below a hoistway, Japanese Patent Application Laid-Open No. Hei 8-26617 discloses a special maintenance operating device provided under a car to distract attention and to prevent a car from being overhead. There is disclosed a configuration in which safety of work in a pit is assured with respect to elevating. In addition, regarding maintenance work on elevators with control panels installed in the hoistway,
Japanese Patent Application Laid-Open No. H10-109846 discloses a configuration in which connectors or terminals required for maintenance work are provided in an elevator hall, and a maintenance work portable terminal is connected to perform maintenance work in the elevator hall. . Further, Japanese Utility Model Laid-Open Publication No. 2-132081 discloses a technique in which a car surface is made to stand by at a specific floor by detecting the level of water inundated in a pit, and the power supply is shut off when the water level further increases. I have.

[0003]

By the way, in an elevator in which a hoist and a control panel are installed in a hoistway, from the viewpoint of safety of maintenance work, the number of operations performed by an operator in a pit is reduced as much as possible. It is desirable to make it. That is, the pit depth is determined by the elevator speed of the car, and some pits are shallower than the average human height. In elevators in which a hoisting machine or a control panel is installed in such a shallow pit, especially when performing maintenance work while raising and lowering the car, not only is the workability bad because the operator is always forced to bend over,
There was also a problem that the car's descent limit was unclear at the site, so it was necessary to pay special attention to safety. As an example of maintenance work performed while raising and lowering the car, there is current measurement of an electric motor that drives a hoist. In order to perform this current measurement outside the hoistway, for example, it is conceivable to attach a probe for current measurement to the power circuit, draw out the probe wire outside the hoistway, and connect the probe wire to the measurement monitor for measurement. But,
Connection work in the pit is troublesome. In addition, there is a problem in that the permanent use of the probe only for current measurement also results in a poor use rate. In addition, since the pits are usually drilled below the ground, the pits may be humid, and if the waterproofing is insufficient, the pits may be flooded. For this reason, in an elevator in which a hoist is installed in a hoistway, there is also a problem that the brake torque may be reduced due to moisture or flooding.

[0004] The present invention has been made to solve the above-mentioned problems, and an elevator in which a hoist and a control panel are installed in a hoistway can perform work at a place where maintenance work is possible. For maintenance of elevators. Also, in elevators in which hoisting machines and control panels are installed in the hoistway, even if the braking torque is reduced due to moisture or flooding, dynamic braking is generated and complemented, and until maintenance work is started. It is an object of the present invention to prevent occurrence of trouble during the maintenance, that is, to prepare for maintenance work.

[0005]

A first elevator maintenance device according to the present invention is a place separated from a hoisting machine and a control panel installed in a hoistway on which a car moves up and down, and can perform maintenance work. A maintenance device for the hoist is provided at a convenient location.

A second elevator maintenance device according to the present invention is the first elevator maintenance device, wherein the maintenance device is configured such that the hoist is moved from the control panel among the main circuit wires of the electric motor that drives the hoist. The part of the main circuit electric wire drawn into a place where maintenance work of the machine is possible.

[0007] A third elevator maintenance device according to the present invention is the second elevator maintenance device, wherein an ammeter is engaged with the main circuit electric wire.

According to a fourth elevator maintenance device of the present invention, in the first elevator maintenance device, the hoist is driven by an electric motor that generates a braking torque by short-circuiting a main circuit. The maintenance device is a short-circuit means for short-circuiting the main circuit.

A fifth elevator maintenance device according to the present invention is the fourth elevator maintenance device, wherein the field of the electric motor is constituted by permanent magnets.

According to a sixth elevator maintenance device of the present invention, in the first elevator maintenance device, the hoist is driven by an electric motor that generates a braking torque by short-circuiting a main circuit. The maintenance device is a stop switch that activates short-circuit means for short-circuiting the main circuit.

In a seventh elevator maintenance device according to the present invention, in the sixth elevator maintenance device, the stop switch is operated when the power supply to the electric motor is stopped, so that the short-circuit means is operated. It is like that.

An eighth elevator maintenance device according to the present invention is the first elevator maintenance device according to the first elevator maintenance device, wherein the liquid level detector is activated when the liquid level of the flooded water reaches a predetermined value in the hoistway. And the maintenance device is short-circuiting means for generating a braking torque by short-circuiting the main circuit of the electric motor which drives the hoist by operating in response to the operation signal of the liquid level detector.

A ninth elevator maintenance device according to the present invention is the elevator maintenance device according to any one of the fourth and sixth to eighth elevators, wherein the maintenance equipment is provided when the main circuit of the motor is short-circuited. It includes an alarm that operates.

A tenth elevator maintenance device according to the present invention is the elevator maintenance device according to any one of the first, second, fourth, sixth, eighth, and ninth elevators, wherein the maintenance equipment comprises: Of the landing operation panels provided on each floor to attract the elevator car, they are attached together with the landing operation panel on a specific floor so that they are always concealed.

An eleventh elevator maintenance device according to the present invention is the tenth elevator maintenance device, wherein the maintenance equipment is concealed by being buried behind a landing operation panel on a specific floor. By removing it, it is exposed and operable.

A first elevator maintenance method according to the present invention is an elevator maintenance method including measuring a current of a main circuit electric wire of a motor for driving a hoist to raise and lower a car, A step of removing the concealment of the maintenance equipment that is normally concealed and being attached together with the landing operation panel so that maintenance work can be performed, and a part of the main circuit wire that is drawn to the position of the maintenance equipment. And reading a measurement value of the ammeter.

A second elevator maintenance method according to the present invention is directed to an elevator maintenance method which includes setting a state in which a braking torque can be generated in an electric motor that drives a hoist to raise and lower a car. Attached together with the operation panel, a step of eliminating the concealment of the normally concealed maintenance equipment to enable maintenance work, and short-circuiting the main circuit for operating the maintenance equipment and supplying power to the electric motor, Setting a state in which a braking torque can be generated.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 1 to 3 show:
Embodiment 1 Embodiment 1 of the present invention will be described. FIG. 1 shows Embodiment 1
1 is a hoistway, 2 is a side wall of the hoistway 1, 3 is a pit of the hoistway 1, 3a is a pit floor, 4 is a car, and 5 is a car 4 Main rope, 6 basket 4
The first pulley around which the main rope 5 rising from
A second pulley around which the main rope 5 rising from the balance weight 8 is wound, and a hoist 9 fixed to the pit floor 3a, drives the car 4 up and down with the main rope 5 wound. 9
a is a motor for driving the hoisting machine 9, and here, a synchronous motor whose field is constituted by a permanent magnet is used. Reference numeral 10 denotes a control panel that controls the electric motor 9a, and reference numeral 11 denotes a brake coil that opens and closes a brake integrated into the hoisting machine 9.

The first floor is the lowest floor, the first floor, the second floor is the second floor,
F indicates the third floor, 1B indicates the first floor hall operation panel, 2B indicates the second floor hall operation panel, and 3B indicates the third floor hall operation panel. Reference numeral 12 denotes a maintenance operation panel in which maintenance equipment is stored, and a first-floor landing operation panel 1B.
And is concealed by being concealed behind, and is exposed for maintenance by removing the cover of the first-floor operation panel 1B during maintenance or by removing the entire first-floor operation panel 1B. Things. 13 is a main circuit electric wire for supplying electric power from the control panel 10 to the armature of the electric motor 9a.
a is a main circuit electric wire of a portion of the main circuit electric wire 13 drawn into the maintenance operation panel 12, and this main circuit electric wire 13a functions as a maintenance device used for current measurement of the electric motor 9a. Reference numeral 14 denotes a call signal line connected to the landing operation panels 1B, 2B, and 3B on each floor, and reference numeral 15a denotes a maintenance signal line that connects the control panel 10 and the maintenance operation panel 12.

FIG. 2 is an electric circuit connection diagram showing a main part of the first embodiment. In the figure, reference numeral 10a denotes an inverter which generates a three-phase alternating current of variable voltage and variable frequency and supplies it to a motor 9a;
10b is a main contactor for connecting the inverter 10a to a power source,
Reference numeral 15 denotes a maintenance circuit incorporated in the maintenance operation panel 12;
Reference numeral 6 denotes a stop switch, which is normally closed and connected to the maintenance circuit 15, and stops the elevator by manual opening. Reference numeral 17 denotes when the motor 9a is stopped, and thus the main contactor 10b
Switch 16 when car is open and car 4 is stopped
Is a short-circuiting contactor that closes when it is opened. The closing of the short-circuit contactor 17 causes the main circuit electric wire 13 to close.
Is connected to the short circuit 18. As a result, even if the braking torque is reduced and the car 4 starts to move due to the unbalanced load with the counterweight 8, the electric motor 9a generates the braking torque and suppresses the acceleration of the car 4, so that the car 4 It can only go up and down at a very slow speed. Reference numeral 19 denotes an alarm which is turned on when the short-circuit contactor 17 is closed. 20 is the main circuit electric wire 13
A current measurement probe for measuring the current a, a current measurement monitor 21 for displaying a current waveform, and a voltmeter 22 for measuring the voltage of the main circuit wire 13a.

Next, the contents of the maintenance work will be described with reference to FIG. In step S11, the maintenance operation panel 12 is made operable. More specifically, in FIG.
By removing B, the operation panel for maintenance 12 is exposed. After confirming that the car 4 has stopped in step S12, the stop switch 16 is manually opened. When the stop switch 16 is opened, a safety circuit (not shown) of the elevator is shut off, the car 4 is prevented from starting, the short-circuit contactor 17 is closed, and the main circuit electric wire 13 is short-circuited. The alarm 19 is turned on by this short circuit. Procedure S from a safety point of view
In step 13, the lighting of the alarm 19 is confirmed, and if not, the operation of step S12 is repeated.

If the annunciator 19 is turned on, the procedure proceeds to step S14.
Then, the current measurement probe 20 and the voltmeter 22 are attached to the main circuit electric wire 13a. In step S15, the stop switch 16 is manually closed to release the short circuit of the main circuit wire 13. Procedure S1
At 6, it is confirmed that the annunciator 19 is turned off. If not turned off, the operation of step S15 is repeated again. When the light is turned off, the car 4 is raised and lowered in step S17, and the main circuit electric wire 1 at that time is moved.
Measure the current and voltage of 3. After confirming the end of the measurement in step S18 and confirming the stop of the car 4 in step S19, the stop switch 16 is manually opened to short-circuit the main circuit wire 13. After confirming the lighting of the alarm 19 in step S20, the current measuring probe 20 and the voltmeter 22 of the main circuit are determined in step S21.
Remove. In step S22, the stop switch 16 is closed,
The short circuit of the main circuit wire 13 is released. After confirming that the annunciator 19 is turned off in step S23, the maintenance operation panel 12 is concealed by installing the first floor hall operation panel 1B in step S24, and the maintenance including the voltage measurement and the current measurement of the main circuit electric wire 13 is performed. Finish the work.

According to the first embodiment, the maintenance operation panel 12 is submerged behind the first-floor landing operation panel 1B, and the main circuit wire 13a is drawn around the maintenance operation panel 12 while being bypassed. At the time of maintenance, the first floor landing operation panel 1B was removed, the operation panel 12 for maintenance was exposed and operable, and the current measurement probe 20 and the voltmeter 22 were engaged with the main circuit wire 13a. Voltage measurement and current measurement of the motor 9a can be performed without entering the hoistway 1.

The motor 9a is a synchronous motor whose field is constituted by permanent magnets.
6 is opened, the short-circuit contactor 17 is closed, and the main circuit wire 13 is connected to the short-circuit 18. For this reason, even if the brake torque is reduced and the car 4 starts to move due to the unbalanced load with the counterweight 8, the motor 9a generates the braking torque and suppresses the acceleration of the car 4, so that the car 4 It can only go up and down at a very slow speed. For this reason, even if the car 4 finally strikes a shock absorber (not shown) provided in the pit 3a, the counterweight 8 may be reversed.
Can safely stop the car 4 even if the car hits the shock absorber. Therefore, in an elevator in which the hoist 9 is installed on the pit floor 3a, an environment of high humidity or flooding is expected, and safety can be ensured even if the brake torque is reduced by such an environment.

Further, since the stop switch 16 is operated after the car 4 is stopped, even if the stop switch 16 is operated and the main circuit wire 13 is short-circuited, an excessive current does not flow. Will not be damaged.
Furthermore, the short-circuit contactor 17 is closed and the main circuit electric wire 13 is closed.
Is short-circuited, the annunciator 19 is turned on, so that the short-circuit of the main circuit wire 13 can be confirmed before the maintenance work, and safety can be ensured. .

[0026]

[Embodiment 1] FIG. 4 shows Embodiment 1
The installation of the main circuit wire 13a as a maintenance device is shown.
That is, the first floor landing operation panel 1B includes a storage box 1Bb embedded in the side wall 2 and a cover 1B that covers the front surface of the storage box 1Bb.
p and a call button 1Bu attached to the cover 1Bp.
And connectors 24 and 25 for connecting the call button 1Bu to the signal line 14. In addition, the first floor landing operation panel 1
An opening is formed on the back surface of the storage box 1Bb of B,
The main circuit electric wire 13a is fixed to the side wall 2 by means of supports 22 and 23 above and below the opening, and stretches vertically through the opening. In the above configuration, in order to measure the current of the main circuit wire 13a, the cover 1Bp is removed, and if necessary, the connector 24 or 25 is removed to separate the cover 1Bp. The current measuring probe 20 is inserted into the hoistway 1 from the back opening of the storage box 1Bb and engaged with the main circuit electric wire 13a. In this state, the car 4 is raised and lowered,
The current at that time is measured by the current measurement monitor 21.

According to the first embodiment, the main circuit electric wire 13a
Is always covered by the cover 1Bp, so that there is no unnaturalness in appearance. Further, at the time of maintenance, the current can be measured by removing the cover 1Bp and engaging the current measuring probe 20 with the main circuit wire 13a, so that the current can be measured without entering the hoistway 1.

Embodiment 2 FIG. FIG. 5 shows another attachment of the main circuit electric wire 13a as the maintenance device in the first embodiment. That is, the main circuit electric wire 13a is drawn into the storage box 1Bb and bent, and the detent 27 is attached to the storage box 1Bb.
b is always drawn into the storage box 1Bb so as to prevent it from coming out of the rear opening. In the above configuration, to measure the current of the main circuit wire 13a, the current measurement probe 20 is engaged with the curved portion of the main circuit wire 13a for measurement after removing the cover 1Bp. In the second embodiment, the main circuit electric wire 13a is bent and drawn into the storage box 1Bb at all times. However, as shown in FIG.
May be run vertically up and down in the opening, and may be drawn into the storage box 1Bb and curved during maintenance.

Embodiment 3 FIG. FIG. 6 shows still another attachment of the main circuit wire 13a as a maintenance device in the first embodiment. That is, the first floor landing operation panel 1B is detached from the side wall 2 integrally with the storage box 1Bb when measuring the current of the main circuit electric wire 13a. For this reason, a larger opening than in the first or second embodiment can be secured. Also,
The main circuit wires 13a are fixed to the side wall 2 above and below the opening formed in the side wall 2 by supports 22 and 23, and run vertically through the opening. The current is measured on the main circuit wire 13a in the vertically running portion in the same manner as in the first embodiment. In the third embodiment, since a large opening can be ensured, it is suitable for measurement when the main circuit wire 13a is thick.

Embodiment 4 FIG. FIG. 7 shows an example in which the main circuit electric wire 13 is short-circuited by the manually operated short-circuit switch 28 instead of the short-circuit contactor 17 as a maintenance device in the first embodiment to generate a braking torque in the electric motor 9a. . That is, the moving element 28a is constantly moving to the "OFF" side in the figure, and energizes the safety circuit 10c of the control panel 10 to enable the operation of the elevator. When performing maintenance work,
When the mover 28a moves to the "ON" side in the figure by a manual operation, the safety circuit 10c is cut off and the operation of the elevator is prevented. The main circuit wire 13 is short-circuited, and the alarm 19 is turned on by the alarm power supply 19a. Therefore, even if the brake torque is reduced and the car 4 starts to move due to the unbalanced load with the counterweight 8, the electric motor 9a generates the braking torque and suppresses the speed increase of the car 4, which is safe.

Embodiment 2 8 and 9 show a second embodiment of the present invention. In the second embodiment, in the elevator in which the hoisting machine 9 and the control panel 10 are installed in the hoistway 1, when the brake torque is reduced due to the flooding in the pit 3, the dynamic brake is generated to supplement the braking torque. It is something to do. That is, FIG. 8 is an electric circuit connection diagram.
A short-circuiting contactor 29 for short-circuiting is provided.
The pit 3 is provided with a first liquid level detector 30 and a second liquid level detector 31 for detecting inundation.

The first liquid level detector 30 operates at a water level which does not affect the hoisting machine 9 and the control panel 10 even when the pit 3 is flooded, and stops the car 4 on the nearest floor. With this stop, the short-circuit contactor 29 is closed to short-circuit the main circuit wire 13 and the main contactor 10b is opened. This is to prepare for a decrease in brake torque due to water intrusion and to avoid damage to equipment due to electric leakage. The second liquid level detector 31 operates at a water level immediately before the hoisting machine 9 is flooded. The second liquid level detector 31 stops the car 4 in an emergency, and in addition to the normal brake, closes the short-circuit contactor 29 and simultaneously activates the dynamic brake. When the second liquid level detector 31 is activated during the stop of the nearest floor by the first liquid level detector 30, the water level rises rapidly due to the flooding, and an urgent measure is taken.

FIG. 9 is a flowchart showing the operation of the elevator when the pit 3 is flooded and the maintenance work. Procedure S
If the first liquid level detector 30 is not operating at 31, the process proceeds to step S <b> 32, and if maintenance is not being performed, the elevator continues normal operation and ends. If the maintenance work is being performed in step S32, the process proceeds to step S34, where the maintenance work is performed according to the procedure shown in FIG. 3, and the operation of the elevator is confirmed by current measurement or the like.

If the first liquid level detector 30 has been activated in step S31, the process proceeds to step S35. When the motor 9a is not operating, that is, when the motor is stopped, the process proceeds to step S40, in which the main contactor 10b is opened to cut off the power supply circuit, thereby preventing leakage due to water intrusion and avoiding damage to the equipment. Step S35
If the electric motor 9a is operating in step S36, the control panel 1
From 0, the nearest floor stop command is issued. When stopping at the nearest floor in step S37, the process proceeds to step S40, in which the main contactor 10b is opened to cut off the power supply circuit. If it has not stopped at the nearest floor in step S37, the process proceeds to step S38, and if the second liquid level detector 31 has been activated, the main contactor 10 is immediately turned on in step S39.
Release b.

If it is determined in step S38 that the second liquid level detector 31 is not operating, the process returns to step S37, and waits for the nearest floor stop to open the main contactor 10b in step S40. Further procedure S
At 41, the short-circuit contactor 29 is closed to prepare for a decrease in brake torque due to water inundation. When the short-circuit contactor 29 is closed, the indicator lamp 19 is turned on in step S42. In step S43, the pit 3a is drained by the maintenance staff, and the equipment is further inspected. When it is confirmed that there is no abnormality, the process proceeds to step S44, where maintenance work is performed according to the procedure shown in FIG. 3, and finally, the operation of the elevator is confirmed by current measurement or the like, and the process ends.

According to the second embodiment, the car 4 can be stopped on the nearest floor in advance even if water is generated.
Even if the braking torque is reduced due to flooding, dynamic braking is also used, so it is possible to prevent the brakes from slipping and causing problems before the maintenance work is started, complementing elevator maintenance it can. In addition, since the main contactor 10b is opened, it is possible to avoid damage to the device due to electric leakage.

Embodiment 3 FIG. 10 is an electric circuit connection diagram showing Embodiment 3 of the present invention. In the third embodiment, in the elevator in which the hoisting machine 9 and the control panel 10 are installed in the hoistway 1, the flooding of the hoisting machine 9 is predicted from the inundation speed into the pit 3, and the car 4 is set in advance. In this case, the vehicle is stopped to the nearest floor or an emergency stop is performed, and a dynamic brake is used together. That is, in FIG. 9, reference numeral 32 denotes a liquid level gauge for measuring the liquid level in the pit 3a, a float 33 which rises and falls with the liquid level, and liquid level detecting elements a1, a2, a3, a4 for detecting the position of the float 33. ,
a5 and a6.

The liquid level detecting element a3 operates at a water level which does not affect the hoisting machine 9 and the control panel 10 even when the pit 3 is flooded, and stops the car 4 on the nearest floor.
The main circuit wire 13 is short-circuited by closing the short-circuit contactor 29. In addition, the liquid level detecting element a6 detects the liquid level in advance and stops the car 4 in an emergency to prevent the brake from being submerged at least until the brake is operated and the car 4 is stopped. 13 is short-circuited. Furthermore, the rising speed of the liquid level is detected from the operation time interval of each of the liquid level detecting elements a1 to a6, the operation time of the liquid level detecting element a3 is predicted, and the car 4 is stopped on the nearest floor in advance, The operation time of the liquid level detection element a6 is predicted, and the car 4 is stopped in advance in advance.

According to the third embodiment, similarly to the second embodiment, the car 4 can be stopped on the nearest floor in advance for flooding. Even if the braking torque is reduced due to flooding, the dynamic brake is also used, so it is possible to prevent the brake from slipping and causing problems before the maintenance work is started, complementing elevator maintenance can do. In addition, since the main contactor 10b is opened, it is possible to avoid damage to the device due to electric leakage.

Embodiment 4 FIG. In the above embodiments, the maintenance equipment such as the stop switch 16 and the main circuit wire 13a is provided behind the landing operation panel. However, the invention is not limited to this. It is good. Further, the synchronous motor having the field constituted by the permanent magnet is used as the electric motor. However, the present invention is not limited to this, and a DC motor having the field constituted by a permanent magnet may be used. Furthermore, in the second and third embodiments, the liquid level detectors 30 and 31 or the liquid level gauge 32 are provided as a countermeasure in a case where the equipment is flooded by being flooded in the pit 3. However, the present invention is not limited to this. Absent. The pit is
The same control may be performed when the humidity is high and the humidity is equal to or higher than a predetermined value because the hole is usually drilled below the ground.

[0041]

As described above, the first elevator maintenance device according to the present invention is a place separated from the hoisting machine and the control panel installed in the hoistway on which the car moves up and down, and performs maintenance work. A maintenance device for the hoist is provided at a possible location. Therefore, in some cases, there is an effect that maintenance work of the hoist can be performed without entering the hoistway.

According to the second elevator maintenance device of the present invention, in the first elevator maintenance device, the maintenance equipment is provided by changing the hoist from the control panel to the main circuit wires of the electric motor for driving the hoist. The part of the main circuit electric wire drawn into a place where maintenance work of the machine is possible. For this reason, by engaging the current measurement probe with the main circuit electric wire, there is an effect that the current measurement of the motor can be performed without entering the hoistway.

A third elevator maintenance device according to the present invention is the same as the second elevator maintenance device, wherein an ammeter is engaged with the main circuit electric wire. For this reason, there is an effect that the current of the electric motor can be measured without entering the hoistway.

According to a fourth elevator maintenance device of the present invention, in the first elevator maintenance device, the hoist is driven by an electric motor that generates a braking torque by short-circuiting a main circuit. The maintenance device is a short-circuit means for short-circuiting the main circuit. For this reason, even if the brake torque decreases and the car starts moving due to the unbalanced load with the counterweight, the electric motor generates braking torque and suppresses the speed increase of the car. I can't get it. In particular, high humidity environments are expected in elevators where a hoist is installed on the pit floor,
There is an effect that safety can be ensured even if the brake torque is reduced by this humidity or by flooding.

A fifth elevator maintenance device according to the present invention is the fourth elevator maintenance device, wherein the field of the electric motor is constituted by permanent magnets. For this reason, even if the brake torque is reduced and the car starts moving due to the unbalanced load with the counterweight, the electric motor has an effect of generating the braking torque and suppressing the speed increase of the car.

According to a sixth elevator maintenance device of the present invention, in the first elevator maintenance device, the hoist is driven by an electric motor that generates a braking torque by short-circuiting a main circuit. The maintenance device is a stop switch that activates short-circuit means for short-circuiting the main circuit. Therefore, even if the brake torque is reduced by operating the stop switch prior to maintenance and the car starts moving due to the unbalanced load with the counterweight, the motor generates the braking torque and increases the speed of the car. This has the effect of being able to control and secure maintenance.

According to a seventh elevator maintenance device of the present invention, in the sixth elevator maintenance device, the stop switch is operated when the power supply to the electric motor is stopped to activate the short-circuit means. It is like that. For this reason, even if the stop switch is operated and the main circuit wire is short-circuited, there is an effect that an excessive current does not flow.

An eighth elevator maintenance device according to the present invention is the elevator maintenance device according to the first elevator, wherein the liquid level detector which operates when the liquid level of the flooded water reaches a predetermined value in the hoistway. And the maintenance device is short-circuit means for generating a braking torque by short-circuiting the main circuit of the electric motor which drives the hoist by being activated by the operation signal of the liquid level detector. For this reason, even if the brake torque is reduced due to the flooding, the dynamic brake is also used, so that it is possible to prevent the brake from slipping until the maintenance work is started, thereby preventing a problem from occurring, and This has the effect of complementing maintenance.

A ninth elevator maintenance device according to the present invention is the elevator maintenance device according to any one of the fourth and sixth to eighth elevators, wherein the maintenance equipment is provided when the main circuit of the motor is short-circuited. It includes an alarm that operates. For this reason, the main short circuit can be confirmed by the annunciator, and the safety of maintenance work can be ensured.

A tenth elevator maintenance device according to the present invention is the elevator maintenance device according to any one of the first, second, fourth, sixth, eighth and ninth elevators, wherein the maintenance equipment comprises: Of the landing operation panels provided on each floor to attract the elevator car, they are attached together with the landing operation panel on a specific floor so that they are always concealed.
For this reason, even if maintenance equipment is installed, there is no unnaturalness in appearance. In addition, there is an effect that the maintenance operation can be performed at the landing by removing the landing operation panel during maintenance.

The eleventh elevator maintenance device according to the present invention is the tenth elevator maintenance device, wherein the maintenance equipment is concealed by being buried behind a landing operation panel on a specific floor. By removing it, it is exposed and operable. For this reason, even if maintenance equipment is installed, there is no unnaturalness in appearance. In addition, during maintenance, you can remove the landing operation panel and perform maintenance work at the landing.
This has the effect.

A first elevator maintenance method according to the present invention is an elevator maintenance method which includes measuring a current of a main circuit electric wire of a motor for driving a hoist to raise and lower a car, A step of removing the concealment of the maintenance equipment that is normally concealed and being attached together with the landing operation panel so that maintenance work can be performed, and a part of the main circuit wire that is drawn to the position of the maintenance equipment. And reading a measurement value of the ammeter. For this reason, since the current can be measured at the landing, there is an effect that the maintenance work is safe.

The second elevator maintenance method according to the present invention is directed to an elevator maintenance method which includes a step of driving a hoist to raise and lower a car so as to generate a braking torque. Attached together with the operation panel, a step of removing the concealment of the normally concealed maintenance equipment to enable maintenance work, and short-circuiting the main circuit for operating the maintenance equipment and supplying power to the electric motor. Setting a state in which a braking torque can be generated.
Therefore, it is possible to operate the electric motor at the landing prior to the maintenance work so that the motor can generate a braking torque, and even if the braking torque is reduced due to flooding, the braking torque is complemented by the above-mentioned braking torque to prevent the occurrence of a malfunction. It has the effect of being able to.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of a hoistway showing an overall configuration of a first embodiment of the present invention.

FIG. 2 is an electric circuit connection diagram showing a main part of the first embodiment of the present invention.

FIG. 3 is a flowchart showing the contents of the maintenance work according to the first embodiment of the present invention.

FIG. 4 is a sectional view showing attachment of the main circuit electric wire 13a according to the first embodiment in the first embodiment.

FIG. 5 is a sectional view showing another attachment of the main circuit electric wire 13a according to the second embodiment in the first embodiment.

FIG. 6 is a sectional view showing still another attachment of the main circuit electric wire 13a according to the third embodiment in the first embodiment.

FIG. 7 is an electric circuit connection diagram using the manually operated short-circuit switch according to the fourth embodiment in the first embodiment.

FIG. 8 is an electric circuit connection diagram showing Embodiment 2 of the present invention.

FIG. 9 is a flowchart showing maintenance work according to the second embodiment of the present invention.

FIG. 10 is an electrical circuit connection diagram showing Embodiment 3 of the present invention.

[Explanation of symbols]

1 hoistway, 2 side walls, 3 pits, 3a pit floor, 4 cars, 9 hoist, 9a motor, 1
0 Control panel, 10b Main contactor, 11 Brake coil, 12 Maintenance operation panel, 13 Main circuit wire, 1
3a main circuit wire, 15a signal wire for maintenance, 16
Stop switch, 17 Short-circuit contactor, 18 Short-circuit, 19 Alarm, 20 Current measurement probe, 2
1 current measurement monitor, 22 voltmeter, 29 contactor for short circuit, 33 float, 34 liquid level detecting element, 1B
First floor hall operation panel, 2B Second floor hall operation panel, 3B 3
Floor platform operation panel.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroshi Araki 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsui Electric Co., Ltd. (72) Inventor Takehiko Kubota 2-3-2 Marunouchi, Chiyoda-ku, Tokyo 3 Inside Rishi Electric Co., Ltd. (72) Inventor Hiroaki Sakurai 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Sanbishi Electric Co., Ltd. (72) Takanori Komatsu 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi F term (reference) in Denki Co., Ltd. 3F304 AA00 BA01 BA02 BA06 CA06 EA00 ED16

Claims (13)

[Claims] 1. An elevator maintenance device comprising a hoist and a control panel, which are separated from a hoist and a control panel installed in a hoistway on which a car moves up and down, and where maintenance equipment for the hoist is provided at a place where maintenance work is possible. 2. The maintenance device according to claim 1, wherein the main circuit electric wire of a portion of the main circuit electric wire of the electric motor for driving the hoist that is drawn from the control panel to a place where the hoist can be maintained. Item 2. An elevator maintenance device according to Item 1. 3. The elevator maintenance device according to claim 2, wherein an ammeter is engaged with the main circuit electric wire. 4. The maintenance machine according to claim 1, wherein the hoist is driven by an electric motor which generates a braking torque by short-circuiting the main circuit, and the maintenance equipment is short-circuit means for short-circuiting the main circuit. Elevator maintenance equipment. 5. The elevator maintenance device according to claim 4, wherein the electric motor is provided with a field by a permanent magnet. 6. The hoist is driven by an electric motor that generates a braking torque by short-circuiting a main circuit, and the maintenance equipment is a stop switch that operates short-circuit means for short-circuiting the main circuit. The elevator maintenance device according to claim 1. 7. The elevator maintenance device according to claim 6, wherein the stop switch is operated when the power supply to the electric motor is stopped to activate the short circuit means. 8. A liquid level detector which is activated in a hoistway when the liquid level of flooded water reaches a predetermined value, and a maintenance device is operated by an operation signal of the liquid level detector. The elevator maintenance device according to claim 1, wherein the main circuit of the electric motor that drives the hoist is short-circuited to generate a braking torque. 9. The elevator maintenance device according to claim 4, wherein the maintenance device includes an alarm that operates when the main circuit of the electric motor is short-circuited. 10. The maintenance equipment is installed together with a landing operation panel of a specific floor among landing operation panels provided on each floor to attract an elevator car, and is always concealed. The elevator maintenance device according to any one of claims 2, 4, 6, 8, and 9. 11. The maintenance equipment is concealed by being buried behind a landing operation panel on a specific floor, and can be exposed and operated by removing the landing operation panel.
0. The elevator maintenance device according to 0. 12. An elevator maintenance method comprising measuring a current of a main circuit wire of an electric motor for driving a hoist to raise and lower a car, wherein the maintenance is attached together with a landing operation panel and always concealed. Removing the concealment of the equipment for maintenance so that the maintenance work can be performed; engaging the ammeter with a part of the main circuit wire that has been drawn to the position of the maintenance equipment; Reading a measured value of the elevator. 13. An elevator maintenance method, which includes setting a state in which a braking torque can be generated in an electric motor that drives a hoist to raise and lower a car, wherein the elevator is installed together with a landing operation panel and is always concealed. A step of removing the concealment of the maintenance equipment to enable maintenance work, and a step of operating the maintenance equipment to short-circuit a main circuit for supplying power to the electric motor, and setting a state capable of generating a braking torque. Elevator maintenance method.