JPWO2018020542A1 - Elevator control device - Google Patents

Abstract

The present invention provides an elevator control device that can determine whether a car is located in a door zone without using a magnetic sensor that does not require a power source or using means such as continuing the supply of battery power to a photoelectric sensor. The purpose is to provide. In order to achieve this, a car that runs in the hoistway, a counterweight connected to the car and the main rope, a motor that is driven by a three-phase power source and transmits the driving force to the main rope, and the motor An elevator control device for controlling an elevator, comprising: a brake that brakes rotation of the motor; a control panel that controls the electric motor; and a photoelectric sensor for door zone detection that detects the position of the car, the control panel Is an elevator control device that displays the door zone on the display device based on the signal in the first input buffer that stores the output signal of the photoelectric sensor.

Description

  The present invention relates to an elevator control device capable of displaying a door zone even when a passenger car is abnormally stopped due to various troubles and a rescue operation is performed.

  As a conventional elevator control device, the one described in Patent Document 1 is known, and paragraphs 0036 to 0042 and the like include the following description.

  If an elevator failure occurs that cannot be restarted between floors, an elevator inspector who rushed in response to the failure signal attaches a brake release device to the failed elevator, and uses a brake release power supply (for example, a battery) as the power supply. By releasing the brake, the passenger is rescued by moving the car in the heavy load direction using the unbalance of the car and the counterweight.

  At this time, the speed of the car is monitored during the brake releasing operation, and when the preset speed is exceeded, the power supply to the hoisting machine brake can be cut off. In this way, in an elevator that uses an electronic safety system, the encoder installed in the governor and the safety controller are used, so the encoder installed in the motor has failed without the need for a power cut-off circuit dedicated for brake release. In some cases, the brake can be released while monitoring the speed.

  Although not explicitly disclosed in Patent Document 1, when the elevator car is moved by operating the brake to be released from a place where the elevator state cannot be directly monitored, the door zone, speed, and driving direction are known using a display device. ing. Such display devices are stipulated in European safety standards (EN standards), Chinese standards (GB standards), etc., and these standards include a method for displaying door zones using detection signals of photoelectric sensors for door zone detection. Is disclosed.

WO2015 / 093217

  However, in the case of Patent Document 1, the power supply to the photoelectric sensor for detecting the door zone is limited to the brake releasing operation using the brake releasing power source. Therefore, after the door zone is detected, the brake releasing operation is stopped and the car is stopped. In other words, during the rescue operation of the passenger, the photoelectric sensor is not supplied with power, and the door zone display on the display device is also turned off, so there is a problem that it cannot be determined whether the car is located in the door zone.

  For this reason, conventionally, a magnetic sensor that does not require a power source and a battery and a circuit that continuously supply power to the photoelectric sensor for detecting the door zone even when the brake is released have been used in combination.

  An object of the present invention is to provide an elevator control device that can display whether a car is located in a door zone even when power is not supplied from a battery to a photoelectric sensor.

  In order to solve the above problems, a car that runs in a hoistway, a counterweight connected to the main car with the car, a motor that is driven by a three-phase power source and transmits the driving force to the main rope, An elevator control device for controlling an elevator, comprising: a brake that brakes rotation of the electric motor; a control panel that controls the electric motor; and a photoelectric sensor for door zone detection that detects the position of the car. The control panel is an elevator control device that displays the door zone on the display device based on the signal in the first input buffer that stores the output signal of the photoelectric sensor.

  According to the present invention, the door zone can be displayed even when the passenger is rescued by releasing the electric brake after the power source is lost.

It is the whole elevator schematic of one Example. It is detail drawing of the elevator control apparatus of one Example. It is a flowchart of the door zone display employ | adopted with the elevator control apparatus of one Example.

  Embodiments of the present invention will be described below with reference to FIGS.

  FIG. 1 shows the overall structure of an elevator that employs an elevator control apparatus according to an embodiment. As shown here, the elevator of this embodiment mainly includes a car 5, a main rope 12 that connects the car 5 and the counterweight 4, a driving force transmitted to the main rope 12, and the car 5 in the hoistway. The motor 3 is moved roughly, the control panel 2 for controlling the motor 3 and the like, and the three-phase power source 1 which is a power source for supplying power to them.

  The control panel 2 includes a safety controller 11 that controls various safety devices in addition to an operation controller that controls normal traveling of the elevator. The safety controller 11 includes a photoelectric sensor 8 via a tail cord 10. Etc., and a signal from a governor encoder 6a described later is also transmitted. Further, the brake 3 b is controlled by the control panel 2 to brake the rotation of the electric motor 3.

  The display device 9 is used by maintenance personnel when the car 5 is moved with the brake released, and by referring to each information of the door zone display, speed display, and driving direction display displayed here, Even from a place where the car 5 cannot be directly monitored, the brake release operation can be executed safely. Here, the “door zone” in the present embodiment is a zone within a certain range (for example, within a range of ± 125 mm) based on the normal stop position at each stop floor of the car 5, and in this door zone, If the door is opened, the passenger can safely escape from the car 5 even if there are some steps.

  During normal times when various troubles have not occurred, the car 5 is subjected to speed feedback control based on a signal from the encoder 3a attached to the electric motor 3. The photoelectric sensor 8 attached to the car 5 senses the distance from the shielding plate 7 provided on each stop floor of the car 5 to determine whether the car 5 is in the door zone.

  Further, the governor 6 which is a safety device for detecting the overspeed of the car 5 is provided with a governor encoder 6a, and a slip occurs between the electric motor 3 and the main rope 12, and based on a signal from the encoder 3a. Even when the speed of the car 5 or the like cannot be accurately obtained, the safety controller 11 can calculate the absolute position and speed of the car 5 from the output signal 96 of the governor encoder 6a.

  FIG. 2 is a diagram for explaining a detailed circuit required when the display device 9 performs door zone display during and after the brake releasing operation.

  If the car 5 stops abnormally due to various troubles such as equipment failure or power failure, the car 5 is moved to the nearest door zone without receiving power from the three-phase power supply 1 and You may need to rescue. This can be realized by the electric brake release described in Patent Document 1, but the brake release circuit of the present embodiment shown in FIG. 2 is characterized by the following configuration.

  That is, the brake release permission switch 92 connected to the battery 91 provided separately from the three-phase power supply 1 is operated when the inspector starts releasing the brake, and in conjunction with the operation of this switch. The two contacts 92a and 92b are turned on or off. When the brake release permission switch 92 is turned on, the brake release contactor coil 94a connected in series to the contact 92a is excited, and the contact 94b of the brake release contactor coil 94a is turned on. As a result, current flows through the brake coil 94c, the brake 3b is released (brake is released), and the car 5 moves downward.

  When the car 5 is moving downward due to the release of the brake, the contact 92b interlocked with the brake release permission switch 92 is also ON. Therefore, the contact 93 of the photoelectric sensor 8 for detecting the door zone connected in series therewith. Is also effective. When the car 5 moves downward and the photoelectric sensor 8 detects the shielding plate 7 provided on each stop floor, the contact 93 outputs a signal indicating that it is in the door zone, and a safety controller input buffer for detecting the door zone. (Hereinafter, input buffer 95). The input buffer 95 can be read from the safety controller 11 even when the photoelectric sensor 8 is not supplied with power.

  Further, the output signal 96 of the governor encoder 6a driven by the 24V power source indicated by P24 in FIG. 2 is stored in the governor encoder safety controller input buffer (hereinafter, input buffer 97). In this embodiment, the input buffer 95 and the input buffer 97 are built in the safety controller 11, but both input buffers may be built in the display device 9 as long as the safety controller 11 can refer to them.

  The safety controller 11 determines whether the car 5 has reached the door zone from the output signal 96 of the contact 93 stored in the input buffer 95 and the output signal 96 of the governor encoder 6 a stored in the input buffer 97, The absolute position of 5 is calculated.

  These calculation results are also stored in a door zone display permission output buffer (hereinafter, output buffer 99), and a door zone display LED 98 provided in the display device 9 is turned on or off according to the stored contents. To do.

  When the photoelectric sensor 8 detects the door zone and the contact 93 outputs a signal, the buzzer 94d sounds to notify that the car 5 has reached the door zone.

  The door zone display during passenger rescue will be specifically described with reference to the flowchart of FIG. Here, it is assumed that the brakes are mechanically released and the passengers in the car 5 are rescued, and the three-phase power source 1 as the power source is OFF (S100).

  The maintenance staff rushed in response to the failure signal confirms whether the car 5 is located in the door zone, and if it is not located in the door zone, it is necessary to move the car 5 downward using the brake release. Judgment is made (S101). If it is determined that the brake needs to be released, the maintenance staff turns on the brake release permission switch 92 (S102).

  As a result, as described in FIG. 2, the brake release contactor coil 94a is excited and the contact 94b is turned on (S103). When the contact 94b is turned ON, a current flows through the brake coil, the brake is released, and the car 5 moves downward (S104). Thereafter, when the photoelectric sensor 8 of the car 5 detects the shielding plate 7, the contact 93 of the photoelectric sensor 8 is turned ON (S105). When the contact 93 is turned on, a signal indicating that the contact 93 is turned on is stored in the input buffer 95 in the safety controller 11 (S106).

  When the output signal of the photoelectric sensor 8 is stored in the input buffer 95, the output buffer 99 is turned on and the door zone display LED 98 is lit (S107). At this time, since the safety controller 11 takes in the output signal 96 of the governor encoder 6a from the information in the input buffer 97 and calculates the absolute position of the car 5, it can be determined whether the car 5 remains in the door zone. is there.

  Therefore, in addition to the input buffer 95, even when a signal indicating that the vehicle is located in the door zone is stored in the input buffer 97, the output buffer 99 is kept on, so that the door zone display LED 98 continues to be lit (Y in S108). ).

  On the other hand, when the signal indicating that the vehicle is located in the door zone is not stored in the input buffer 97 (when the signal indicating that the car 5 is out of the door zone is stored in the input buffer 97 (N in S108)). The door zone display LED 98 is turned off (S112). That is, in this embodiment, the output signal 96 of the governor encoder 6a is used for determining whether the door zone display LED 98 is turned off.

  In this embodiment, regardless of the state of the brake release permission switch 92, the door zone display LED 98 is turned over based on the stored contents of the input buffer 95 and the input buffer 97 (S109). Even when 92 is OFF, that is, when there is no power supply from the battery 91, the door zone display can be continued.

  In addition, when the car 5 moves and exits the door zone after the rescue operation is completed, that is, an OFF edge in which the input signal from the contact 93 of the photoelectric sensor 8 changes from ON to OFF within a certain time is detected (S111). ), The door zone display LED 98 is turned off (S112). Using these techniques, after the rescue operation is completed, it is possible to return to the automatic operation (S113).

  According to the elevator control apparatus of the present embodiment described above, the door zone can be displayed even when the passenger is rescued by releasing the electric brake after the power supply is lost.

DESCRIPTION OF SYMBOLS 1 ... Three-phase power supply, 2 ... Control panel, 3 ... Electric motor, 3a ... Encoder, 3b ... Brake, 4 ... Counterweight, 5 ... Riding car, 6 ... Governor, 6a ... Governor encoder, 7 ... Shield plate, 8 ... Photoelectric Sensor, 9 ... Display device, 91 ... Battery, 92 ... Brake release permission switch, 92a, 92b ... Contact, 93 ... Contact, 94a ... Brake release contactor coil, 94b ... Contact, 94c ... Brake coil, 94d ... Buzzer, 95 ... Input buffer, 96 ... Output signal, 97 ... Input buffer, 98 ... LED for door zone display, 99 ... Output buffer, 10 ... Tail code, 11 ... Safety controller, 12 ... Main rope

Claims (4)

A car that runs in the hoistway,
A counterweight connected by the main rope with the car,
An electric motor driven by a three-phase power source and transmitting the driving force to the main rope;
A brake for braking the rotation of the motor;
A control panel for controlling the electric motor;
A photoelectric sensor for door zone detection for detecting the position of the car;
An elevator control device for controlling an elevator equipped with
The control panel displays a door zone on a display device based on a signal in a first input buffer storing an output signal of the photoelectric sensor. In the elevator control device according to claim 1,
Furthermore, a governor for detecting an overspeed of the car,
A governor encoder provided in the governor;
With
The control panel displays a door zone on the display device based on a signal in a second input buffer storing an output signal of the governor encoder. The elevator control device according to claim 2,
When both the signal in the first buffer and the signal in the second buffer are signals indicating a door zone, the door zone display of the display device is turned on,
An elevator control device that turns off the door zone display of the display device when either of the signal in the first buffer and the signal in the second buffer is not a signal indicating a door zone. The elevator control device according to any one of claims 1 to 3,
And a switch for supplying electric power from a battery to the photoelectric sensor when the brake is released,
The control panel displays a door zone on a display device based on a signal in the first input buffer regardless of a state of the switch.

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