KR20080022999A - Circuit and method for break of elevator in case of a power failure - Google Patents

Abstract

A circuit and a method for stopping an elevator in case of a power failure are provided to enhance convenience of installation of the stopping circuit by separating an installation position of the stopping circuit by using at least one DC power. A circuit for stopping an elevator in case of a power failure includes a pair of power supplying units(10,11), a solenoid(50), a pair of condensers(60,61), a pair of switches(31,41), and a stopping switch. The power supplying unit supplies power to drive the elevator. The solenoid controls a speed regulator and/or a rope stopping device of the elevator in case of blocking of power. The condenser charges the power and supplies the charged power to the solenoid in case of a power failure. The switches are connected to the solenoid in series and is opened and closed according to a stoppage of power supply, overspeed, or door opening of the elevator. The interrupt switch supplies of the charged power to the solenoid so as to stop the elevator in case of the blocking of the power and the overspeed or door opening of the elevator.

Description

Braking Circuit and Braking Method in Elevator Power Failure {CIRCUIT AND METHOD FOR BREAK OF ELEVATOR IN CASE OF A POWER FAILURE}

1 is a braking circuit diagram in case of power failure of an elevator according to a first embodiment of the present invention;

2 is a braking circuit diagram in case of power failure of an elevator according to a second embodiment of the present invention;

3 is a braking circuit diagram in case of power failure of an elevator according to a third embodiment of the present invention;

4 is a braking circuit diagram in case of power failure of an elevator according to a fourth embodiment of the present invention;

5 is a braking circuit diagram in case of power failure of an elevator according to a fifth embodiment of the present invention;

6 is a braking circuit diagram of a power failure of an elevator according to a sixth embodiment of the present invention;

7 is a braking circuit diagram of a power failure of an elevator according to a seventh embodiment of the present invention;

8 is a braking circuit diagram in case of power failure of an elevator according to an eighth embodiment of the present invention;

9 is a braking circuit diagram in case of power failure of an elevator according to a ninth embodiment of the present invention;

`` Explanation of symbols for main parts of drawings ''

10, 11: power supply 22: power failure detection relay

23: power failure detection relay 31: door open detection switch

32: Door open detection relay 33: Door open detection relay contact

41: speed detection switch 42: speed detection relay

43: electrostatic detection relay contact 50: solenoid

60: first capacitor 61: second capacitor

D1, D2, D3, D4: Diode

The present invention relates to a braking circuit of an elevator, and more particularly, to a braking circuit and a method of a power failure of an elevator to perform a braking operation without time delay by detecting the door opening and the speed of the elevator car in the event of a power failure.

An elevator is a mechanical device which moves up and down by the rope which raises or lowers according to the operation of a hoisting machine. There are many safety devices in the elevator. The safety device of the elevator is provided with a brake device for stopping the elevator car on each floor. And, by using the governor rope interlocking with the rope to detect the falling speed or the lifting speed of the elevator, and if the detected speed exceeds the set value, the governor is installed to stop the elevator car by driving the emergency stop device built in the elevator car It is. The governor also functions to stop the elevator car by driving the emergency stop device even when the elevator car is operated or the door is not stopped at a predetermined position while the door is open. Along with this, a rope braking device for braking the rope for driving the elevator is also provided.

In this way, the elevator brakes the elevator car by using a hoisting brake, a governor and a rope braking device. However, when the braking devices are operated together in a conventional elevator, a sudden braking occurs, which causes a big shock to passengers in the elevator car.

Accordingly, in order to solve this problem, Patent Application No. 10-2003-0064834 (name: brake circuit in case of power failure of an elevator) (hereinafter referred to as 'prior art') has been filed. The prior art provides a braking circuit during an outage of an elevator that minimizes the impact on the elevator passengers during an outage. In the prior art, the power supply is charged to the capacitor during normal driving, and when the power failure occurs, the primary braking is performed by the hoisting brake, and the charging power of the capacitor is supplied to the solenoid driving the governor and the rope braking device. Braking after time has elapsed. In other words, the prior art delays the operation of the governor and the rope braking device for a time when the charging power of the capacitor is supplied, and when the charging power is completely discharged to stop the power supply to the solenoid, Perform secondary braking. Accordingly, the prior art prevents sudden braking of the elevator car when a power failure occurs, thereby preventing a safety accident caused by an impact caused by sudden braking.

However, since the prior art performs the first braking by the hoist brake when a power failure occurs, and after the predetermined time passes, the second braking is performed by the governor and the rope braking device. If the speed of the elevator car or door opening occurs, the elevator car may move even when the primary braking is performed. Accordingly, in the prior art, there is a problem that a safety accident occurs due to an overspeed governor or a door opening occurring during a power failure.

Accordingly, the present invention has been made to solve the problems described above, an object of the present invention is to provide a braking circuit and a braking method in the event of a power failure of the elevator to perform a braking operation immediately if the speed of the elevator car or the door opening occurs during the outage In providing.

The brake circuit in case of power failure of an elevator according to the present invention for achieving the above object is a power supply for supplying a supply power for driving the elevator, and braking of the governor and / or rope braking device of the elevator when the supply power is cut off A solenoid performing an operation, a capacitor charging the supply power and supplying charging power to the solenoid in the event of a power failure, a switch connected in series with the solenoid and operating in accordance with power failure, speeding, or door opening of the elevator; It is characterized in that it comprises a disconnect switch for blocking the supply of charging power of the capacitor to the solenoid so that the elevator brakes when the supply power is cut off and the door operation occurs by the switch operation.

Preferably, the cutoff switch includes a speed detection switch and / or a door opening detection switch that cuts off a supply path of the charging power when the speeding or door opening occurs.

The speed detecting switch and the door opening detecting switch may be configured in series between the solenoid and the capacitor.

According to the present invention, when the supply power is cut off, a power failure detection relay for sensing an outage and operating in series with the cutoff switch is connected to the operation of the power failure detection relay and supplied to the solenoid. It is preferably configured to further include a first relay contact for opening and closing the.

It is preferable to further include a diode (D1) connected in series between the electrostatic detection relay and the capacitor to prevent the charging power of the capacitor from being supplied to the electrostatic detection relay when the supply power is cut off.

The supply power is supplied to the capacitor to charge the supply power, and when the supply path is interrupted by the disconnect switch, the supply power of the capacitor is connected in parallel with the disconnect switch to prevent the supply of charge power to the solenoid. It is preferable to further comprise a diode (D2).

The braking circuit of the elevator according to another aspect of the present invention for achieving the above object is a power supply for supplying a supply power for driving the elevator, and the governor and / or rope braking of the elevator when the supply power is cut off A solenoid for braking the device, a capacitor for charging the supply power and supplying charging power to the solenoid in the event of a power outage, and a switch connected in series with the solenoid and opening / closing according to power failure, speeding, or door opening of the elevator And a first relay contact for opening and closing operation in conjunction with an operation of the electrostatic detection relay for detecting the interruption of the power supply and the operation of the electrostatic detection relay, a door opening detection switch for opening and closing according to the door opening of the elevator, and a door opening detection thereof. The second relay detects the door opening by the switch and operates And a second relay contact point for the second relay and an overspeed detection switch that operates when the elevator is overspeed, and the overspeed detection switch opens or the second relay contact opens when an overspeed or door open occurs during the power failure. It is characterized by braking the elevator by blocking the supply of the charging power of the capacitor to the solenoid.

In the present invention, it is preferable that the speed detecting switch and the first relay contact are configured in series between the capacitor and the solenoid.

And a third relay that operates by detecting an overspeed of the elevator by opening the speed detecting switch, and a third relay contact point for the third relay, wherein the speed detecting switch and the third relay comprise The second relay contact and the third relay contact and the second relay contact is preferably configured in series connected to the front end of the capacitor.

The second relay and the third relay is preferably configured to operate by receiving the charging power of the capacitor.

And a diode (D3) connected in series between the electrostatic detection relay and the capacitor to prevent the charging power of the capacitor from being supplied to the electrostatic detection relay when the supply power is cut off.

And a second capacitor configured to charge the power supply and to supply the charging power to the second relay when the power failure occurs.

The first relay contact is preferably configured in series connection to the front end of the second capacitor to open when the power failure occurs to supply the charging power of the second capacitor to the second relay.

The supply power is supplied to the second capacitor to charge the supply power, and the charging power of the second capacitor is supplied to the second relay and / or the third relay when the supply path is interrupted by the first relay contact. It is preferable to further comprise a diode (D4) for preventing the.

The brake circuit in case of power failure of an elevator according to another aspect of the present invention for achieving the above object is a relay unit for receiving a supply power from the first power supply unit to detect the power failure / speed / door opening, and the second power supply The elevator is supplied with supply power for driving the elevator from the supply unit, and when the overspeed or the door is opened in the state of power failure, the supply of charging power to the capacitor is blocked by the overspeed / door open detection relay operation of the relay unit to operate the elevator. It is configured to include a braking unit for stopping, characterized in that the relay unit and the braking unit are spaced apart from each other.

The brake unit charges the solenoid for stopping the elevator driving when the supply power of the second power supply unit is cut off, the switch opened by the electrostatic / speed / door opening, and the supply power of the second power supply unit. A first capacitor supplying the charged power to the solenoid at the time of power failure; and operation of the relay unit to cut off the charging power of the first capacitor when the speed or the door opening occurs when the supply power is cut off. It is preferable to include a second relay contact and a third relay contact to be switched to the open state.

The braking unit supplies supply power from the second power supply unit to the first capacitor and charges power of the first capacitor to the solenoid when the supply path is interrupted by the second relay contact and the third relay contact. It is preferable to further comprise a diode (D2) to prevent the supply.

The relay unit may include a power failure detection relay detecting a power failure when the first power supply unit is blocked, a first relay contact which is switched to a closed state by the power failure detection relay operation, and a door opening detection which is switched to an open state when the door is opened. A first relay unit in which a door opening detection relay operating by detecting a door opening by a switch and the door opening detecting switch operation is connected in series, a first relay contact which is switched to a closed state by the electrostatic detection relay operation, and the speed When the power outage is generated by charging the supply power from the speed detection switch which is switched to the open state, the speed detection relay which is connected to the speed detection relay which operates by detecting the speed by the speed detection switch in series, and the power supply from the first power supply. A second shaft for supplying the charged power to the electrostatic sensing relay, the first relay unit, and the second relay unit; Comprising: a group, wherein the electrostatic sensing relay, the first relay unit and the second relay unit is preferably configured in parallel are respectively connected to the first power supply.

The relay unit further includes a diode (D3) for preventing the charging power of the second capacitor from being supplied to the power failure detection relay when the power failure occurs.

Preferably, the relay unit is configured in the control panel of the elevator, and the brake unit is configured in the governor and / or the rope braking device.

It is preferable that the said power supply is a DC power supply.

The power supply unit is preferably configured to include a rectifier for receiving a commercial AC power to convert the DC voltage level required for driving the elevator.

Braking method of the elevator in case of power failure in accordance with the present invention for achieving the object as described above, and charging the supply power for driving the elevator, supplying the charged power to the solenoid when the supply power is cut off and the hoist brake device A primary braking step of stopping driving of the elevator by driving, detecting a door opening or overspeed in the first braking step, and when the door opening or overspeed occurs, by cutting off the power supplied to the solenoid And a second braking step of stopping the driving of the elevator by driving a rope braking device.

In the present invention, when the door opening or the overspeed does not occur in the primary braking step, it is preferable to perform the secondary braking after a delay for a time for which the charging power is supplied.

In the present invention, when the door opening or overspeed occurs when the supply power supply, it is preferable to stop the elevator driving by cutting off the power supplied to the solenoid.

The present invention having the configuration as described above, and detects whether the speed and / or door opening occurs when the power failure occurs. When speed and / or door opening are detected, a braking operation is immediately performed by cutting off the charging power of the capacitor supplied to the solenoid driving the governor and the rope braking device. In addition, the present invention, when the power outage occurs without the speed and the door open, the charging power of the capacitor is supplied to the solenoid to delay for a predetermined time and then perform a braking operation.

Hereinafter, a braking circuit in case of power failure of an elevator according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Here, the embodiments of the present invention intend to brake the elevator car immediately when speeding or door opening occurs during a power failure, and have a similar circuit structure. Therefore, when the present embodiments are sequentially described, the same circuit configuration will be described with the same reference numerals, and the same description will be omitted.

1 is a braking circuit diagram of a power failure of an elevator according to a first embodiment of the present invention.

FIG. 1 shows a configuration in which power is supplied to a solenoid 50 for driving a governor or a rope braking device by using a DC power supply from the power supply unit 10. Although the power supply of the power supply unit 10 has been described as a DC power source, this may be supplied by converting a commercial AC power input from the outside into a DC power of a predetermined voltage level using a rectifier (not shown).

The solenoid 50 receives power when the elevator is normally driven and stops the elevator car by driving the governor and the rope braking device when DC power is not supplied from the power supply unit 10 due to a power failure. . The solenoid 50 is powered / blocked by a first switch 70 connected in series. The first switch 70 is opened in response to an overspeed, door open, or power failure signal transmitted from an elevator controller (not shown) to cut off the DC power.

A capacitor 60 is provided to charge and receive the DC power from the power supply unit 10 through the first diode D1, the first switch 70, and the second diode D2. The capacitor 60 supplies the charged power to the solenoid 50 when the DC power is not supplied due to a power failure.

When the supply of the DC power is interrupted due to a power outage, a first relay contact that operates in conjunction with a power failure detection relay (hereinafter referred to as a “first relay”) 22 and the first relay 22 that detects it. 23 is provided. In the first embodiment, the first relay 22 and the first relay contact 23 have a configuration connected in parallel to the DC power supply (+). In addition, the first relay contact 23 is in series with a door open detection switch (hereinafter referred to as 'second switch') 31 and an overspeed detection switch (hereinafter referred to as 'third switch') 41 which will be described later. Have a connected configuration. The first relay contact 23 is normally in an open state, and is switched to a closed state according to the operation of the first relay 22. The open state is a state in which power supply is cut off, and the closed state is a state in which power is supplied. Thus, the charging power of the capacitor 60 is supplied to the solenoid 50.

The second switch 31 is opened and closed according to whether the door of the elevator car is opened, and the third switch 41 is opened and closed depending on whether the governor is overspeed. The second switch 31 and the third switch 41 may be configured as a mechanical switch that is mechanically operated independently of the supply of the DC power, or according to the state of the mechanical switch configured separately, It may be configured as a switch for opening and closing operation under the control of the elevator control unit for generating a governor overspeed signal.

On the other hand, when the charging power of the capacitor 60 is supplied to the first relay 22 which is turned off when a power failure occurs, the first relay 22 may not operate normally. Accordingly, the first diode D1 is provided between the capacitor 60 and the first relay 22 to prevent the charging power of the capacitor 60 from being supplied to the first relay 22. . In addition, the second diode D2 supplies the DC power to the capacitor 60 and prevents the charging power of the capacitor 60 from flowing to the solenoid 50 when the power failure occurs. .

Hereinafter, a method of braking at the time of power failure of an elevator according to the first embodiment of the present invention will be described in detail.

First, when the DC power is normally supplied from the power supply unit 10 before the power failure occurs, the capacitor 60 is connected to the first diode D1 and the first switch 70 and the second diode D2 in the closed state. The DC power is supplied and charged through the solenoid 50 and the first relay 22, and thus the DC power is not supplied. At this time, the first relay contact 23 maintains an open state.

During the supply of the DC power, the first relay 22 operates by detecting a power failure in response to an abnormal state occurring. Therefore, the elevator controller transfers the power failure signal to the first switch 70 to switch to the open state. At this time, the elevator control unit performs the primary braking to stop the driving of the elevator car by driving the brake device of the hoist. Subsequently, as the first relay contact 23 switches to the closed state in association with the operation of the first relay 22, the capacitor 60 supplies the charging power to the solenoid 50. At this time, the second switch 31 and the third switch 41 are both closed. As such, when the door is not opened or overspeed during the power failure, the solenoid 50 performs the secondary braking operation after delaying the operation of the governor and the rope braking device during the time when the charging power of the capacitor 60 is completely discharged. . As a result, the elevator car is braked only by the hoisting brake device, thereby preventing sudden braking. The delay time between the primary braking and the secondary braking is preferably set to about 3 seconds. At this time, the first diode D1 prevents the charging operation of the capacitor 60 from being supplied to the first relay 22 by delaying the switching operation to the open state of the first switch 70.

However, if the door open occurs in the state of power failure, it operates as follows.

The door open signal of the elevator control unit is transmitted to the first switch 70 and the second switch 31. The second switch 31, which has received the door open signal (directly according to the door open when the second switch 31 is a mechanical switch), is switched from the closed state to the open state by the door open signal. Accordingly, the charging power of the capacitor 60 supplied to the solenoid 50 is cut off, so that the solenoid 50 drives the governor and the rope braking device. Due to this, the elevator car is immediately braked.

In addition, when the governor overspeed occurs in the state of power failure occurs as follows.

The elevator control unit transmits the governor overspeed signal to the first switch 70 and the third switch 41. The third switch 41 which receives the governor overspeed signal (in the case of a mechanical switch according to the overspeed governor occurrence) switches from the closed state to the open state by the governor overspeed signal. Accordingly, the charging power of the capacitor 60 supplied to the solenoid 50 is cut off, so that the solenoid 50 drives the governor and the rope braking device. Due to this, the elevator car is immediately braked.

In addition, if the door open or overspeed occurs during normal power supply is operated as follows.

First, when the door opening occurs, the elevator control unit transmits a door opening signal to the first switch 70 and the second switch 31. As the first switch 70 and the second switch 31 are switched from the closed state to the open state, the solenoid 50 cannot receive power from the power supply 10 and the capacitor 60. Accordingly, the solenoid 50 drives the governor and the rope braking device, and the elevator car is immediately braked.

Next, when the overspeed governor occurs, the elevator control unit transmits the overspeed governor signal to the first switch 70 and the third switch 41. As the first switch 70 and the third switch 41 are switched to the open state, the solenoid 50 is not supplied with power from the power supply unit 10 and the capacitor 60. Accordingly, the solenoid 50 drives the governor and the rope braking device, and the elevator car is immediately braked.

Next, Figure 2 is a braking circuit diagram when the power failure of the elevator according to a second embodiment of the present invention. The configuration of FIG. 2 is similar to that of FIG. 1, except that the second switch 31, the third switch 41, and the first relay contact 23 are connected in series between the solenoid 50 and the capacitor 60. It is configured, and the first switch 70 is configured in parallel connection.

As in the first embodiment, when the power failure occurs, the first relay 22 operates by sensing the power failure, and the first switch 70 is switched to the open state. At this time, the first relay contact 23 is switched from the open state to the closed state in association with the operation of the first relay 22. Accordingly, the solenoid 50 receives the charging power of the capacitor 60 through the second switch 31, the third switch 41, and the first relay contact 23, and the capacitor 60 is completely discharged. When the supply is stopped, the governor and the rope braking device are driven. This prevents sudden braking of the elevator car.

When the door is opened at the time of power failure, the second switch 31 is switched to the open state, and the charging power of the capacitor 60 supplied to the solenoid 50 is cut off. Similarly, if overspeed occurs during a power failure, the third switch 41 is switched to the open state, and the charging power of the capacitor 60 supplied to the solenoid 50 is cut off. Thus, if overspeed or door opening occurs during power outage, as the charging power of the capacitor 60 is cut off, the solenoid 50 drives the governor and the rope braking device, and the elevator car is immediately braked.

3 is a braking circuit diagram of a power failure of an elevator according to a third embodiment of the present invention.

Referring to FIG. 3, in the configuration of FIG. 1, a door open detection relay (hereinafter referred to as a “second relay”) that operates by detecting a door open according to an operation state of the second switch 31 and the second switch 31. 32 is configured in parallel connection with the electrostatic detection relay 22. That is, the first relay contact 23, the second switch 31, and the second relay 32 that operate in correspondence with the operation of the first relay 22 are configured in series. In addition, a second relay contact 33 which operates in response to the operation of the second relay 32 is provided between the third switch 41 and the capacitor 60. The second relay contact 33 normally supplies the DC power to the capacitor 60 in a closed state, and supplies the charging power of the capacitor 60 to the solenoid 50 when the power failure occurs. On the other hand, when the door opening occurs, the second relay contact 32 switches to the open state as the second relay 32 operates to block the DC power or the charging power of the capacitor 60.

In addition, the third diode D3 for blocking the supply of the capacitor 60 power supplied to the second relay 32 to the first relay 22 includes the first relay 22 and the first relay contact ( 23) consists of a serial connection between.

Next, the braking method at the time of power failure of the elevator according to the third embodiment will be described in detail. When a power failure occurs, the first switch 70 is switched to the open state as in the first embodiment, and the first relay 32 operates by detecting the power failure. The capacitor 60 supplies the charged power to the solenoid 50 via the second relay contact 33 and the third switch 41, and the first capacitor contact via the first relay contact 23 and the second switch 32. Power is also supplied to the two relay contacts 33. Therefore, even if a power failure occurs, the second relay 32 may operate by detecting a door opening.

If door open occurs during power outage, it operates as follows.

When the second switch 31 is switched to the open state by the door open occurrence signal of the elevator controller, the second relay 32 operates by detecting the door open. Subsequently, the second relay contact 33 is switched to the open state according to the operation of the second relay 32, so that the charging power of the capacitor 60 supplied to the solenoid 50 is cut off. Accordingly, the solenoid 50 drives the governor and the rope braking device, and the elevator car is immediately braked.

When overspeed occurs when the power failure occurs, the operation is as follows.

When the third switch 41 is switched to the open state by the governor overspeed generation signal of the elevator controller, the charging power of the capacitor 60 supplied to the solenoid 50 is cut off. Accordingly, the solenoid 50 drives the governor and the rope braking device, and the elevator car is immediately braked.

Next, the braking circuit and method during power failure of the elevator according to the fourth embodiment of the present invention will be described in detail with reference to FIG. 4.

The configuration of FIG. 4 is similar to that of FIG. 3, except that the speed detection relay operates by detecting whether the speed governor is overspeed depending on the operation state of the third switch 41 and the third switch (hereinafter referred to as 'the third relay'). 42 is configured in parallel connection to the first relay 22 and the second relay 32. That is, the first relay contact 23, the third switch 41, and the third relay 42, which operate in response to the operation of the first relay 22, are configured in series. In addition, a third relay contact 43 that operates in response to the operation of the third relay 42 is provided between the second relay contact 33 and the capacitor 60. At this time, when the third switch 41 is switched to the open state, the third relay 42 operates by detecting the overspeed governor, and the third relay contact 43 is in the closed state according to the operation of the third relay 42. It is switched to the open state.

Next, the braking method at the time of power failure of the elevator according to the fourth embodiment will be described in detail. When a power failure occurs, the first relay 22 detects the occurrence of the power failure, and the first relay contact 23 switches to the closed state according to the operation of the first relay 22. The third relay 42 may operate by detecting an overspeed governor using the charging power of the capacitor 60 supplied through the first relay contact 23.

If overspeed occurs when the power failure occurs, the operation is as follows.

As the third switch 41 is switched to the open state, the third relay 33 operates by detecting the overspeed governor. Subsequently, in conjunction with the operation of the third relay 42, the third relay contact 43 is switched to the open state, and the charging power of the capacitor 60 supplied to the solenoid 50 is cut off. Accordingly, the solenoid 50 drives the governor and the rope braking device, and the elevator car is immediately braked.

Meanwhile, FIGS. 5 to 7 are braking circuits during power failure of an elevator. 5 to 7 are similar to and operate the same as the configuration of FIGS. 3 and 4, only different configurations will be described, and descriptions of overlapping operations will be omitted.

5 is a braking circuit diagram of a power failure of an elevator according to a fifth embodiment of the present invention.

The configuration of FIG. 5 is similar to that of FIG. 4, except that the door opening / speed detection relay (hereinafter 'the first') detects the door opening and the overspeed governor according to the operation state of the second switch 31 and the third switch 41. 36 'is configured as a parallel connection to the first relay 22. That is, the first relay contact 23, the second switch 31, the third switch 41 and the fourth relay 36 are configured in series. In addition, a fourth relay contact 37, which is switched from the open state to the closed state according to the operation of the fourth relay 36, is provided at the front end of the capacitor 60.

6 is a braking circuit diagram in case of power failure of an elevator according to a sixth embodiment of the present invention.

The configuration of FIG. 6 is similar to that of FIG. 3, but includes a second capacitor 61 for supplying power to the second relay 32. The second capacitor 61 charges the power supplied through the third diode D3 when the DC power is normally supplied. As the first relay contact 33 is switched to the closed state in conjunction with the operation of the first relay 22 when the power failure occurs, the charging power of the second capacitor 61 is controlled by the first relay contact 22 and the second. It is supplied to the second relay 32 through the switch 31. Accordingly, the second relay 32 receives the charging power of the second capacitor 61 when the power failure occurs and detects the door opening.

7 is a braking circuit diagram of an elevator power failure according to a seventh embodiment of the present invention. The configuration of FIG. 7 is similar to that of FIG. 6, except that the first relay contact 23 is formed in front of the second capacitor 61 and the fourth diode is configured in parallel connection with the first relay contact 23. (D4) is provided. When the DC power is normally supplied, the fourth diode D4 supplies the supplied power to the second capacitor 61. Accordingly, the second capacitor 61 receives the DC power and charges it, and when the power failure occurs, the second capacitor 61 removes the charging power of the second capacitor 61 through the first relay contact 23 and the second switch 31. 2 relays 32 are supplied. Accordingly, the second relay 32 receives the charging power of the second capacitor 61 and operates by detecting the door opening when the power failure occurs.

The sixth embodiment and the seventh embodiment are provided with separate capacitors to supply power to the second relay in the event of a power failure, which may be equally applied to FIGS. 3 to 5.

8 and 9, power supply units 10 and 11 are provided to supply power to the relay unit (part A) and the brake unit (part B), respectively, and are spaced apart within a predetermined distance.

8 is a braking circuit diagram of a power failure of an elevator according to an eighth embodiment of the present invention.

8 is similar to FIG. 4, and is divided into a relay unit A receiving DC power from the first power supply unit 10 and a braking unit B receiving DC power from the second power supply unit 11. It is configured. Then, as illustrated in FIG. 6, the first capacitor 60 to supply charging power to the braking unit A and the second capacitor 61 to supply charging power to the relay unit B are provided. For this reason, the relay unit A may be installed in the control panel of the elevator, and the brake unit B may be installed in the governor and / or the rope braking device. In this case, the first power supply unit 10 and the second power supply unit 11 may be configured to supply a DC power of the same voltage level, the first power supply unit 10 is applied to the commercial AC power to the elevator It may be configured to include a rectifier rectified by a DC power supply of the voltage level required for driving.

The relay unit A includes a first relay 22 for detecting a power failure when the first power supply unit 10 is blocked, a first relay contact 23 for closing by the first relay operation, and the door. The second switch 31 which is switched to the open state when opened, and the second relay 32 which detects the door opening by the operation of the second switch 31 are configured in the first relay unit connected in series. In addition, the first relay contact 23 is switched to the closed state by the first relay 22 operation, the third switch 41 is switched to the open state when the speed is excessive, and the third switch 41 is operated. A second relay unit in which a third relay 42 which operates by sensing an overspeed is connected in series is configured. In addition, a second capacitor which charges the supply power from the first power supply unit 10 and supplies the charged power to the first relay 22, the first relay unit, and the second relay unit when the power failure occurs. The first relay 22, the first relay unit, and the second relay unit are configured to be connected in parallel with the first power supply unit 10, respectively. In addition, the relay unit A includes a diode D3 for preventing the charging power of the second capacitor 61 from being supplied to the first relay 22 when the power failure occurs.

The braking unit B is provided with a solenoid 50 which stops driving the elevator when the supply power of the second power supply 11 is cut off. Then, the first switch 70 is switched to the open state by the power outage / speed / door opening, and the power supply of the second power supply unit 11 is charged to supply the charged power to the solenoid when the power failure occurs. The first capacitor 60 to be supplied to 50 is configured. In addition, when the speed or the door opening occurs when the power supply is cut off, the second relay contact (switched to an open state by the operation of the relay unit A to cut off the charging power of the first capacitor 60) 33 and the third relay contact 43 are configured. In addition, when the supply power from the second power supply 11 is supplied to the first capacitor 60 and the supply path is blocked by the second relay contact 33 and the third relay contact 43, the first A diode D2 is provided to prevent the charging power of the capacitor 60 from being supplied to the solenoid 50.

At this time, the first diode D1 of FIG. 4, which prevents the charging power of the first capacitor 60 from being supplied to the first relay 22, is removed.

Next, a description will be given of a braking method at the time of power failure of the elevator according to the eighth embodiment.

The first capacitor 60 passes through the second diode D2 while the DC power supply of the second power supply 11 is normally supplied, or via the second relay contact 33 and the third relay contact 43. Supply and charge

When the supply power of the first power supply unit 10 and the second power supply unit 11 is cut off, the first switch 70 is switched to the open state by the elevator control unit. Subsequently, the first capacitor 70 supplies the charged power to the solenoid 50 through the second relay contact 33 and the third relay contact 43. Accordingly, the solenoid 50 drives the governor and the rope braking device after delaying while the charging power of the first capacitor 60 is supplied, thereby preventing sudden braking of the elevator car.

On the other hand, when the door open or the governor overspeed occurs during the power outage, the second relay 32 or the third relay 42 operates according to the switching of the open state of the second switch 31 or the third switch 41. Then, the second relay contact 33 or the third relay contact 43 is switched to the open state in conjunction with the operation of the second relay 32 or the third relay 42. Therefore, since the charging power of the first capacitor 60 is cut off, the solenoid 50 drives the governor and the rope braking device, and the elevator car is immediately braked.

Next, FIG. 9 is a braking circuit diagram of an elevator power failure according to a ninth embodiment of the present invention.

The configuration of FIG. 9 is similar to that of FIG. 8, except that the first capacitor 60 is connected to the second power supply 11 and the solenoid 50 in parallel, and the second relay contact 33 is configured. And a third relay contact 43 is configured in parallel with the first switch 70.

When a power failure occurs, the first switch 70 is switched to the open state by the elevator control unit. The first capacitor 60 supplies the charged power to the solenoid 50 through the second relay contact 33 and the third relay contact 43 while the DC power of the second power supply 11 is normally supplied. . Accordingly, the solenoid 50 drives the governor and the rope braking device after delaying while the charging power of the first capacitor 60 is supplied, thereby preventing sudden braking of the elevator car.

On the other hand, when the door open or the governor overspeed occurs during the power outage, the second relay 32 or the third relay 42 operates according to the switching of the open state of the second switch 31 or the third switch 41. Then, the second relay contact 33 or the third relay contact 43 is switched to the open state in conjunction with the operation of the second relay 32 or the third relay 42. Therefore, since the charging power of the first capacitor 60 is cut off, the solenoid 50 drives the governor and the rope braking device, and the elevator car is immediately braked.

The configuration of the ninth embodiment can be equally applied to the third to seventh embodiments described above.

The eighth and ninth embodiments enable the configuration of the solenoid by detecting whether the door is opened or the overspeed occurs by using at least one DC power source and at least one capacitor.

Through the operation as described above, the present invention charges the DC power to the capacitor in the normal power supply state and supplies the charging power of the capacitor to the solenoid at the time of power failure, and also detects whether the door open and overspeed occurs. If overspeed or door opening occurs during a power failure, the charging power of the capacitor supplied to the solenoid is cut off to immediately perform a braking operation.

As described above, the present invention has been described with reference to the embodiments shown in the drawings, which are merely exemplary, and a person of ordinary skill in the art without departing from the spirit and scope of the present invention. It will be apparent that various modifications, changes, and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

As described above, the present invention determines whether to supply power to the solenoid by detecting whether the door open and overspeed during power outage. That is, the present invention performs a braking operation after a delay while the charging power of the capacitor is supplied during a normal power failure, and immediately performs a braking operation when an overspeed or door opening occurs during a power failure. Accordingly, the present invention can prevent safety accidents due to overspeed or door opening during power outages. In addition, the present invention can also prevent a safety accident due to sudden braking during a general power failure. In addition, the present invention can be configured by separating the installation position of the braking circuit using one or more DC power. For this reason, the present invention has the advantage of improving the convenience in installing the braking circuit.

Claims (25)

A power supply unit for supplying a power supply for driving an elevator; A solenoid for braking the governor and / or the rope braking device of the elevator when the supply power is cut off; A capacitor for charging the supply power and supplying charging power to the solenoid when a power failure occurs; A switch connected in series with the solenoid and opened and closed according to power failure, speed, or door opening of the elevator; The power supply of the elevator characterized in that it comprises a shut-off switch to block the supply of the charging power of the capacitor to the solenoid so that the elevator is braked when the supply power is cut off and the door operation occurs by the switch operation City braking circuit. The method of claim 1, The shutoff switch may include a speed detecting switch and / or a door opening detecting switch which cuts off a supply path of the charging power when the speeding or door opening occurs. The method of claim 2, And the speed detecting switch and the door opening detecting switch are connected in series between the solenoid and the capacitor. The method of claim 1, A power failure detection relay which operates by detecting occurrence of power failure when the power supply is cut off;  And a first relay contact connected to the cutoff switch in series to open and close the charging power of the capacitor supplied to the solenoid in conjunction with the operation of the electrostatic detection relay. The method of claim 1, And a diode (D1) connected in series between the electrostatic detection relay and the capacitor to prevent the charging power of the capacitor from being supplied to the electrostatic detection relay when the supply power is cut off. Braking circuit in case of power failure. The method of claim 1, The supply power is supplied to the capacitor to charge the supply power, and when the supply path is interrupted by the disconnect switch, parallel to the disconnect switch to prevent the charging power of the capacitor from being supplied to the solenoid. The brake circuit of the elevator, characterized in that it further comprises a diode (D2) connected. A power supply unit for supplying a power supply for driving an elevator; A solenoid for braking the governor and / or the rope braking device of the elevator when the supply power is cut off; A capacitor for charging the supply power and supplying charging power to the solenoid when a power failure occurs; A switch connected in series with the solenoid and opened and closed according to power failure, speed, or door opening of the elevator; A first relay contact configured to open and close in conjunction with an operation of detecting an interruption of the power supply and an operation of the interruption detection relay; A second relay which operates by detecting a door opening by a door opening detecting switch and a door opening detecting switch which open and close according to the door opening of the elevator; And a second relay contact point for the second relay and an overspeed detection switch that operates when the elevator is overspeed, When the power outage occurs, if the speed or the door open occurs, the elevator is braked by blocking the supply of charging power of the capacitor to the solenoid by opening the speed detecting switch or opening the second relay contact. Braking circuit. The method of claim 7, wherein And the speed detecting switch and the first relay contact are connected in series between the capacitor and the solenoid. The method of claim 7, wherein A third relay which operates by detecting an overspeed of the elevator by opening the speed detecting switch; And further comprising a third relay contact for the third relay, The speed detecting switch and the third relay are connected in parallel to the second relay, and the third relay contact and the second relay contact are configured to be connected in series with the front end of the capacitor. Circuit. The method of claim 9, And the second relay and the third relay are configured to operate by being supplied with charging power of the capacitor. The method of claim 9, And a diode (D3) configured to be connected in series between the electrostatic detection relay and the capacitor to prevent the charging power of the capacitor from being supplied to the electrostatic detection relay when the supply power is cut off. Braking circuit in case of power failure of elevator. The method of claim 7, wherein And a second capacitor configured to charge the power supply and to supply the charging power to the second relay when the power failure occurs to operate the power supply. The method of claim 7, wherein Wherein the first relay contact is opened in the event of a power outage and is configured in series connection with a front end of the second capacitor to supply the charging power of the second capacitor to the second relay. The method of claim 7, wherein The supply power is supplied to the second capacitor to charge the supply power, and the charging power of the second capacitor is supplied to the second relay and / or the third relay when the supply path is interrupted by the first relay contact. The brake circuit of the elevator, characterized in that it further comprises a diode (D4) to prevent it. A relay unit for receiving power supply from the first power supply unit and detecting an outage / speed / door opening; Receiving the supply power for driving the elevator from the second power supply unit, and when the speed or the door opening occurs in the state of power failure, the supply of charging power of the capacitor is cut off by the overspeed / door opening detection relay operation of the relay unit It is configured to include a brake to stop driving the elevator, The relay unit and the braking unit is a brake circuit when the blackout of the elevator, characterized in that spaced apart from each other. The method of claim 15, wherein the braking unit, A solenoid for stopping driving of the elevator when the supply power of the second power supply is cut off; A switch opened by the power failure / speed / door opening; A first capacitor charging the supply power of the second power supply unit to supply the charged power to the solenoid when the power failure occurs; And a second relay contact point and a third relay contact point which are switched to an open state by an operation of the relay unit to cut off the charging power of the first capacitor when the speed or the door opening occurs when the supply power is cut off. Braking circuit in case of power failure of elevator. The method of claim 16, wherein the braking unit, Supplying the supply power from the second power supply unit to the first capacitor and preventing the charging power of the first capacitor from being supplied to the solenoid when the supply path is interrupted by the second relay contact and the third relay contact. Braking circuit at the time of power failure of the elevator, characterized in that it further comprises a diode (D2). The method of claim 15, wherein the relay unit, A power failure detection relay for detecting a power failure when the first power supply is blocked; A first relay contact which is switched to a closed state by the electrostatic detection relay operation, a door opening detection switch which is switched to an open state when the door is opened, and a door opening detection relay which operates by detecting a door opening by the door opening detection switch operation The first relay unit is connected in series, A first relay contact which is switched to the closed state by the electrostatic detection relay operation, a speed detection switch which is switched to the open state at the time of speeding, and a speed detection relay which detects the speed by the speed detection switch operation and is connected in series 2 relays, And a second capacitor which charges the supply power from the first power supply and supplies the charged power to the power failure detecting relay, the first relay part, and the second relay part when the power failure occurs. The blackout circuit of the elevator, characterized in that the blackout detection relay, the first relay portion, the second relay portion is connected in parallel with the first power supply. The method of claim 18, wherein the relay unit, And a diode for preventing the charging power of the second capacitor from being supplied to the power failure detecting relay when the power failure occurs. The method of claim 15, The relay unit is configured in the control panel of the elevator, The braking circuit of the elevator, characterized in that configured in the governor and / or rope braking device. The method according to any one of claims 1, 7, and 15, The power supply is a braking circuit when the power failure of the elevator, characterized in that the direct current power. The method according to any one of claims 1, 7, and 15, And the power supply unit includes a rectifier for receiving commercial AC power and converting the DC voltage level to drive the elevator. Charging supply power for driving an elevator, A primary braking step of supplying the charged power to the solenoid and stopping the driving of the elevator by driving the hoisting brake device when the supply power is cut off; Detecting door open or overspeed in the first braking step; When the door open or overspeed occurs, the power supply to the solenoid is shut off to drive the governor and the rope braking device to stop the driving of the elevator, characterized in that it comprises a second power failure of the elevator Braking method. The method of claim 23, wherein If the door opening or overspeed does not occur in the primary braking step, the braking method when the blackout of the elevator, characterized in that the secondary braking is performed after a delay for a time when the charging power is supplied. The method of claim 23, wherein When the door opening or overspeed occurs when the supply power supply, braking method of the elevator in case of power failure, characterized in that to stop the elevator driving by cutting off the power supplied to the solenoid.

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