CN109153531B - elevator control device - Google Patents

Abstract

An object of the present invention is to provide an elevator control device capable of judging whether or not a car is located in a door area without using a magnetic sensor that does not require power and a battery power supply to continuously supply the photoelectric sensor. To achieve this object, an elevator control device The controlled elevator includes: a car running in the hoistway; a counterweight connected to the car via a main wire rope; a motor driven by a three-phase power supply and transmitting the driving force to the main wire rope; the rotation of the motor is controlled. a control panel for controlling the motor; and a photoelectric sensor for door area detection that detects the position of the car, the control panel is based on a first input buffer in which an output signal of the photoelectric sensor is stored The signal is displayed in the door area on the display device.

Description

elevator control device

technical field

The present invention relates to an elevator control device capable of displaying a door area even when a car carries passengers and is directly and abnormally stopped due to various failures and rescue work is performed.

Background technique

As a conventional elevator control apparatus, the technique described in patent document 1 is known, and the following descriptions are included in the paragraphs 0036 to 0042 and the like.

When the elevator fails to restart between floors, the elevator inspector who arrives after receiving the fault signal installs a brake release device on the elevator in which the fault occurs, and uses a power source for brake release (such as a battery) as the power source The brake release operation of the car uses the balance between the car and the counterweight to move the car in the direction of the heavy load, thereby rescuing the passengers.

In addition, at this time, the speed of the car is monitored during the brake release operation, and when the speed exceeds a preset speed, the power supply to the hoisting machine brake can be cut off. In this way, in the elevator to which the electronic safety system is applied, by using the encoder provided in the governor and the safety controller, a power cut-off circuit dedicated to the release of the brake is not required and even in the event of a failure of the encoder provided in the motor The brake release operation can also be performed while monitoring the speed.

Also, although not explicitly disclosed in Patent Document 1, when a brake release operation is performed to start an elevator car from a place where the elevator state cannot be directly monitored, the door area, speed, and running direction are known using a display device. Such a display device is limited to European safety standards (EN standards), Chinese standards (GB standards), and the like, and these standards disclose a method of displaying a door area using a detection signal of a photoelectric sensor for door area detection.

prior art literature

Patent Literature

Patent Document 1: WO2015/093217

SUMMARY OF THE INVENTION

The problem to be solved by the invention

However, in the case of Patent Document 1, the power supply to the photoelectric sensor for door area detection is limited to the brake release operation using the power supply for brake release. Therefore, after the door area detection, the brake release operation is stopped and the car is in In the stopped state, that is, during passenger rescue work, no power is supplied to the photoelectric sensor, and the display in the door area of the display device is also stopped (OFF), so it is impossible to determine whether the car is located in the door area.

Therefore, in the prior art, a magnetic sensor that does not require a power source is used in combination with a battery and circuit that continues to supply power to the photoelectric sensor for door area detection even when the brake is released.

An object of the present invention is to provide an elevator control device capable of displaying whether or not a car is located in a door area even without supplying power to a photoelectric sensor from a battery.

technical solutions for problem solving

In order to solve the above problems, the present invention provides an elevator control device for controlling an elevator, wherein the elevator includes: a car running in a hoistway; a counterweight connected to the car via a main wire rope; A motor for transmitting driving force to the main rope; a brake for braking the rotation of the motor; a control panel for controlling the motor; and a photoelectric sensor for door area detection for detecting the position of the car, the control The disk displays the gate area on the display device based on the signal in the first input buffer in which the output signal of the photoelectric sensor is stored.

Invention effect

According to the present invention, the door area can be displayed even when the electric brake is released to rescue the passenger after the power source is lost.

Description of drawings

FIG. 1 is an overall schematic diagram of an elevator of one embodiment.

Fig. 2 is a detailed view of the elevator control apparatus of one embodiment.

Figure 3 is a flow chart of the door area display employed in the elevator control device of one embodiment.

Detailed ways

Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 3 .

Fig. 1 is an overall structure of an elevator to which an elevator control device of an embodiment is applied. As shown here, the elevator of this embodiment mainly includes: a car 5, a main wire rope 12 that connects the car 5 and the counterweight 4, a motor 3 that transmits driving force to the main wire rope 12 to move the car 5 in the hoistway, The control panel 2 which controls the electric motor 3 etc., and the three-phase power supply 1 which is the power supply which supplies electric power to these components.

In addition, the control panel 2 includes not only an operation controller that controls the normal operation of the elevator, but also a safety controller 11 that controls various safety devices, and transmits signals from the photoelectric sensor 8 and the like to the safety controller 11 via the accompanying cable 10, and also transmits A signal from the governor encoder 6a to be described later. Furthermore, the brake 3b is controlled by the control panel 2, and the rotation of the electric motor 3 is braked.

The display device 9 is a device used by maintenance personnel when the car 5 is moved by releasing the brakes, and by referring to the information of the door area display, speed display, and running direction display displayed here, even if the car 5 cannot be directly monitored. The brake release operation can also be performed safely in places with Here, the "door area" in this embodiment refers to an area within a certain range (for example, within a range of ±125 mm) based on the normal stop position of the car 5 on each stop floor. With the door open, passengers can safely leave the car 5 even if there is some height difference.

In normal times when various failures do not occur, the car 5 is subjected to speed feedback control based on a signal from the encoder 3 a attached to the motor 3 . Moreover, the photoelectric sensor 8 attached to the cage|basket 5 detects the distance between the cage|basket|car 5 and the shielding board 7 provided in each stop floor, and judges whether the cage|basket|car 5 is located in a door area.

In addition, the governor encoder 6a is attached to the governor 6 as a safety device for detecting the overspeed of the car 5. Even if slip occurs between the electric motor 3 and the main wire rope 12, it cannot be accurately determined based on the signal from the encoder 3a. When the speed and the like of the car 5 are independently obtained, the safety controller 11 can also 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 illustrating a detailed circuit required for the display device 9 to display the door area during and after the brake release operation.

When the car 5 stops abnormally due to various faults such as equipment failure and power failure while carrying passengers, it is necessary to move the car 5 to the nearest door area without receiving the power supply from the three-phase power supply 1 to rescue the passengers. Case. Although this can be achieved by the electric brake release described in Patent Document 1, the brake release circuit of the present embodiment shown in FIG. 2 has the following features.

That is, the brake release permission switch 92 connected to the battery 91 provided separately from the three-phase power supply 1 is a member operated when the inspector starts to release the brake, and the two contacts 92a and 92b are turned on in conjunction with the operation of the switch ( ON) or disconnected (OFF). When the brake release permission switch 92 is turned on, the brake release contactor coil 94a connected in series with the contact 92a is excited, and the contact 94b of the brake release contactor coil 94a is turned on. Thereby, a current flows to the brake coil 94c, the brake 3b is released (brake release), and the cage|basket|car 5 moves downward.

When the car 5 moves downward due to the release of the brake, the contact 92b linked with the brake release permission switch 92 is also turned on, and the contact 93 of the photoelectric sensor 8 for door area detection connected in series is also enabled. When the car 5 moves downward and the photoelectric sensor 8 detects the shielding plate 7 installed on each stop floor, the contact 93 outputs a signal indicating that it is located in the door area, which is stored in the safety controller input buffer for door area detection (hereinafter referred to as the for the input buffer 95). This input buffer 95 can be read from the safety controller 11 even when the photoelectric sensor 8 is not powered.

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

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

In addition, these calculation results are also stored in the door area display permission output buffer (hereinafter referred to as output buffer 99), and the door area display LED 98 provided in the display device 9 is turned on or off according to the contents stored here.

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

The door area display in passenger rescue will be specifically explained using the flowchart of FIG. 3 . Here, it is assumed that the brake is mechanically released and the passengers in the car 5 are rescued, and the three-phase power supply 1 as the power supply is turned off (S100).

The maintenance personnel who arrived after receiving the failure signal confirms whether the car 5 is located in the door area, and when it is not located in the door area, it is determined that it is necessary to move the car 5 after the brake is released downward ( S101 ). When it is determined that the brake release is required, the maintenance person turns on the brake release permission switch 92 (S102).

Thereby, as described in FIG. 2, the contactor coil 94a for brake release is excited, and the contact 94b becomes conductive (S103). When the contact 94b is turned on, a current flows to the brake coil, the brake is released, and the car 5 moves downward (S104). After that, 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, the input buffer 95 in the safety controller 11 stores a signal indicating that the contact 93 is turned on (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 gate area display LED 98 is turned on (S107). At this time, the safety controller 11 also obtains 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, so that it can judge whether the car 5 stays in the door area.

Therefore, when not only the input buffer 95 but also the input buffer 97 stores a signal indicating that it is in the gate area, the output buffer 99 is continuously turned on, so that the gate area display LED 98 is continuously lit (YES in S108).

On the other hand, if the input buffer 97 does not store the signal indicating that the car 5 is located in the door area (if the input buffer 97 stores the signal indicating that the car 5 is outside the door area (NO in S108)), the door area is The display LED 98 is turned off (S112). That is, in the present embodiment, the output signal 96 of the governor encoder 6a is used for the determination of turning off the door area display LED 98 .

In addition, in the present embodiment, the door area display LED 98 is reversed based on the storage contents of the input buffer 95 and the input buffer 97 without depending on the state of the brake release permission switch 92 (S109), so even when the brake release permission is enabled The door area display can be continued even when the switch 92 is turned off, that is, when there is no power supply from the battery 91 .

In addition, when the car 5 moves away from the door area after the rescue operation is completed, that is, when the input signal from the contact 93 of the photoelectric sensor 8 changes from on to off within a certain period of time, a disconnection edge is detected (S111 ). ), the door area display LED 98 is turned off (S112). Using these techniques, it is possible to resume the automatic operation after the rescue operation is completed (S113).

According to the elevator control device of the present embodiment described above, the door area can be displayed even when the power source is lost and the passenger is rescued by releasing the electric brake.

Explanation of reference numerals

1...three-phase power supply; 2...control panel; 3...motor; 3a...encoder; 3b...brake; 4...counterweight; 5...car; 6...speed governor; 6a...speed governor encoder; 7... 8...photoelectric sensor; 9...display device; 91...battery; 92...brake release enable switch; 92a, 92b...contacts; 93...contacts; 94a...brake release contactor coil; 94b...contacts; 94c...brake coil; 94d...buzzer; 95...input buffer; 96...output signal; 97...input buffer; 98...LED for door area display; 99...output buffer; Controller; 12...Main wire rope.

Claims (3)

1. an elevator control device for controlling an elevator, is characterized in that: The elevator includes: Cars running in the hoistway; a counterweight connected to the car via the main wire rope; Driven by a three-phase power supply, a motor that transmits driving force to the main wire rope; a brake for braking the rotation of the electric motor; a control panel for controlling the electric motor; a photoelectric sensor for door area detection that detects the position of the car; a governor that detects overspeed of the car; and The governor encoder set on the governor, The control panel performs a display on the display device based on the signal in the first input buffer storing the output signal of the photoelectric sensor and the signal in the second input buffer storing the output signal of the governor encoder. The door area is displayed. 2. elevator control device as claimed in claim 1 is characterized in that: In the case where the signal in the first input buffer and the signal in the second input buffer are both signals representing the door area, the door area display of the display device is lit up, When either the signal in the first input buffer or the signal in the second input buffer is not a signal indicating the gate area, the display of the gate area of the display device is turned off. 3. elevator control device as claimed in claim 1 or 2 is characterized in that: also includes a switch for supplying power from a battery to the photosensor when the brake is released, The control panel performs gate area display on the display device based on the signal in the first input buffer regardless of the state of the switch.

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