JPH02231387A - Door control device for elevator - Google Patents

Abstract

PURPOSE:To prevent an elevator from deteriorating its operation such as impossible caused by an increase of load driving a door due to a pressure of air or the like sucked from a hall by constituting the elevator increasing drive torque of a door motor, only when the door drive load is increased, and surely performing the original action of opening and closing the door. CONSTITUTION:A drive pattern of a door motor 11 and tbe target time of opening and closing a door are stored in each memory device 22 in accordance with each door position. Next from a door position detection signal from a detector 12, the door open-close time in each door position is measured by a time detecting means. A difference between the actual door open-close time measured by this time detecting means and the target door open-close time is measured by a measuring means. A decision means 21 decides this difference for whether or not it exceeds the permissible time. As a result, when the difference exceeds the permissible time, the door is once placed in a fully opened condition. Thereafter a control device 2 outputs a command so as to increase drive torque of the door motor 11 again closing the door.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention provides an elevator door control system that enables door opening/closing operations to be performed reliably even when the door drive load increases when the elevator door is opened/closed. Regarding equipment.

(Prior Art) The configuration of a conventional elevator door control device will be explained with reference to FIG. In FIG. 6, reference numeral 1 denotes an elevator control panel for controlling the elevator, and a door opening/closing signal IA is input from this elevator control panel 1 to a door control system 2. The door control device 2 consists of a door control circuit 3, a pattern circuit 6, a main circuit control circuit 7, a main circuit drive circuit 8, and a door main circuit 9.
The door opening/closing signal IA is given to a door control circuit 3 within the door control device 2. A door position signal 12 from a door position detector 12, which will be described later, is input to the door control circuit 3, and these signals determine the shape and supply voltage value of the door motor drive pattern determined by the door control circuit 3, door opening/closing and reopening operations, and the door position. Outputs selection signal 3A. When this selection signal 3A is input to the door pattern selection circuit 5, the door pattern selection circuit 5 selects the supply voltage data set in the door pattern setting device 4, and based on this, the control pattern circuit 6 sets the door motor drive pattern. is generated and sent to the 5-door main circuit control circuit 7. As a result, this door main circuit control circuit 7 controls the main circuit drive circuit 8 based on the input door motor drive pattern.
A switching signal for the main circuit control element is sent to the door main circuit 9, and the main circuit drive circuit 8 outputs a control output corresponding to this switching signal to the door main circuit 9. Based on this, the door main circuit 9 gives a drive output to the door motor 1l, so that
The door motor 11 is drive-controlled. In this case, the door main circuit 9 is composed of semiconductor elements such as thyristors and transistors, and controls the output of the door power supply 10 and supplies it to the door motor 11. In such a door control device, door control is performed based on the following door drive speed pattern. Figure 4 shows an example. In Fig. 4, the horizontal axis indicates the position of the door; point O is the closed end, point D is the open end, and point A is the engagement point between the elevator door, the car door, and the floor door, the hall door. Point B indicates the end point of acceleration, and point C indicates the start point of deceleration. The vertical axis indicates the door speed, and the area between points -A and B indicates the acceleration region. Then, the maximum speed VT is reached at point B. B
, C is the constant speed region, and the area between C and D is the deceleration region.6 Figure 5 shows another example of the door drive pattern, and the horizontal axis is the same door drive pattern as in Figure 2. The position is shown, and the vertical axis is the power voltage. When voltage is supplied to the door motor based on this, torque is generated, and control at the door speed approximately shown in Figure 4 can be realized. here. O. In order to reduce the engagement noise between points A and 2, the area until the car door and hall door engage is
The acceleration is small. Also, the pattern after point D is for flowing an open lock current, which is the voltage for keeping the door open. (Problem to be Solved by the Invention) By the way, in the elevator/evening door control device configured as described above, when the door drive load is constant, the door drive speed pattern shown in FIG. 4 or the door drive speed pattern shown in FIG. It is possible to control the door based on the door drive pattern shown in Figure 2. However, if wind is sucked into the elevator car when the door is closed from the open state, the door drive load increases due to the pressure.
The door becomes difficult to close due to insufficient drive torque of the door motor. Therefore, especially when the influence of wind on the lobby floor is large, such as in recent high-rise buildings, the door drive load increases significantly due to the wind pressure, which can make elevators unable to run or cause door malfunctions. Sometimes. Therefore, it may be possible to greatly adjust the drive torque of the door motor in consideration of such fluctuations in the door drive load, but if this is done, the force for opening and closing the door will become too large, making it difficult for passengers to touch the door. If caught, it is dangerous, and safety remains a problem.

When the door drive load increases, the present invention resets the door state to fully open the door again, and then increases the door motor drive torque to ensure the original door closing operation. This prevents elevator operation from becoming impossible or door failure due to increased load. Furthermore, since the present invention allows the door to be fully opened once, it is not necessary to change the drive characteristics of the door motor, so it is an object of the present invention to provide an elevator door control device that is easy to use. ．． [Structure of the Invention] (Means for Solving the Problem) In order to achieve the above objects, the present invention selects a door motor drive pattern based on an elevator door opening/closing signal and a door position detection signal to control door opening/closing. In the door control device for an elevator, the data storage means stores the drive pattern of the door motor and the target opening/closing time of the door according to each door position, and the door opening/closing time at each door position is measured from the door position detection signal. a time detecting means; a measuring means for measuring the difference between the actual door opening/closing time measured by the time detecting means and the target door opening/closing time; and the actual door opening/closing time and the target door opening/closing time measured by the measuring means. The present invention is characterized by comprising a determining means for determining whether or not the difference between the two times exceeds a permissible time.

(Function) When this determination means determines that the actual door opening/closing time exceeds the allowable time with respect to the target door opening/closing time, the control device increases the drive torque of the door motor after fully opening the door. The system issues a command to close the door again, ensuring that the desired door opening/closing process is performed. (Embodiment) An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an oval configuration example of an elevator door control device according to the present invention. The same parts as in FIG. . That is, in this embodiment, as shown in FIG. 1, in place of the portions corresponding to the pattern setting circuit 4, pattern selection circuit 5, and control pattern circuit 6 of the conventional device explained in FIG. The configuration is such that a pattern setting device 20 is provided. This door pattern setting device 20 is a CP that is the center of control.
U21. It is comprised of a storage device 22 that serves as a storage and work area for programs and data, a DA converter 23 that converts output data of the CPU 21 into analog output, and a timer 24. In this case, the CPU 21 has A-
Door position signals from about 10 points indicating the operating points of the door, such as point D, are inputted from a cam switch (not shown). FIG. 2 is a book circuit diagram showing the door pattern setting device 20 in detail. As shown in FIG. 2, the CPU 21 and peripheral devices are connected by a data path, so that all information is processed as a data amount of, for example, about 8 bits. Furthermore, the storage device 22 in FIG. 1 is roughly divided into a program section 22A made up of ROM and a data section 22B made up of RAM. The program section 22A is capable of processing all door operations with a processing capacity of, for example, about 4 kbytes, and the data section 22B has a processing capacity of, for example, about 1 kbyte, and is used for temporary storage of data. It is. The data section 22B includes a permissible time register 26 that stores permissible time data when the door passes each cam switch;
It includes a time measurement register 27 that measures the actual door movement time from the state of the cam switch detected by the CPU 21, and a basic pattern register 28 that stores a plurality of door drive patterns.

In this case, the allowable time register 26 stores allowable data that is calculated for each basic clock as the allowable time for the door to pass through each cam switch based on the clock signal from the reference timer 25 taken into the CPU 21. It will be done. That is, the allowable time register 26 has the same number of register sections as the number of cam switches, and if the signals from the cam switches from the door open state to the door close are A-Z, the first cam switch A - cam switch The permissible data when moving between B is stored in the corresponding register section as 1-byte data, and the value is, for example, lsec.
It is set to about. The data bus also includes a reference clock circuit 29, which outputs a clock signal serving as a reference for the time measurement register 27, and a CP.
When the door driving pattern stored in the basic pattern register 28 is selected by U21, the pattern signal is sent to D/
D/A converts A and outputs it to the main circuit control circuit 7 in FIG.
An input/output device [30] that converts signals from the converter 23, cam switch, etc. into a form suitable for processing by the CPU 21 and outputs the converted signals is connected. Next, the operation of the elevator door control system configured as described above will be described using the flowchart shown in FIG. Figure 3 shows the flow of processing during door closing operation. In Figure 3, in step l, it is determined whether or not a door closing command has been issued from the elevator control panel 1. The operation of this routine starts only when the Therefore, if the door safety etc. is activated, this routine will be invalid. If it is determined in step 1 that a door closing command has been issued, then in step 2 it is checked whether a torque UP command for improving the door drive torque is being output. This has already improved the torque to detect whether the door is closing. In this case, it is the first detection, so move on to step 3. In step 3, the time taken for the door to move between cam switch A and cam switch B is measured.

For example, by counting the reference clock signal from when cam switch A is turned on until when cam switch B is turned on, the amount of time can be determined. In this case, the reference clock circuit 29 interrupts the CPU 21 every 10 msec to inform the CPU 21 of the reference time, thereby counting the travel time between the cam switch A and the cam switch B, and storing the amount of time in the time measurement register 27. It will be done. When the door movement time between cam switch A and cam switch B is measured in step 3, in step 4, the door movement time between cam switch A and cam switch B stored in the time measurement register 27 is stored in the allowable time register 27. Determine whether the time is within the allowable time between the corresponding cams stored in the
If the permissible time is within the allowable time, the standard set basic door drive pattern is read out from the basic pattern register 28 and output to the D/A converter 23. If it is determined that the allowable time has been exceeded, the maximum door drive pattern is selected and output to the D/A converter 23. In this case, in step 5, a torque UP command is simultaneously set and notified to step 2. Further, in step 6, a door opening command is set to once fully open the door so that the door motor drive torque can be effectively generated.

When the torque UP command is set in this way, the system is configured to detect completion of door closing in step 7 and cancel the torque UP command at step white. Furthermore, FIG. 7 shows the door control pattern output shown in FIG. 4 in synchronization with the flowchart in FIG. 3. The steps are therefore according to FIG.

In this figure, the door moves from point A, which indicates the door fully open, to points B and C in response to the door open command, but when the door does not reach point D, which indicates the door close, even after the allowable time, the door is fully opened once. It represents. Generally used door motor torque is often not effective even if the torque is improved at a point where the influence of wind pressure etc. is large, so improving the torque after the door is fully opened as in the present invention has an effect on wind pressure. It becomes difficult to be exposed. In this way, in this embodiment, the on/off mode is turned on/off depending on the open/closed position of the door.
Detects each cam switch turning off and determines whether the actual door movement time is within a predetermined allowable time,
If the allowable time is exceeded, the door is driven to open and close using the maximum door drive pattern, so even if the door drive load increases due to wind pressure, etc., there is almost no effect, and the door can be opened and closed reliably. .

〔Effect of the invention〕

As described above, according to the present invention, only when the door drive load increases, the drive torque of the door motor is increased to ensure that the original door opening/closing operation can be performed.
Elevator operation will not become impossible due to increased door drive load due to wind pressure sucked in from the hall, and doors will not open and close smoothly due to dirt accumulated near the door sills. Even in such a case, it is possible to expel dirt and the like by increasing the torque of the door motor, and it is possible to provide an elevator door control device that is free from problems in terms of failure and safety.

[Brief explanation of the drawing]

Fig. 1 is a block circuit diagram showing an example of an elevator door control device according to the present invention, Fig. 2 is a block circuit diagram showing details of a door pattern setting device in the same embodiment, and Fig. 3 is a block circuit diagram showing the details of the door pattern setting device in the same embodiment. FIG. 4 is a door control pattern output diagram, FIG. 5 is a door control pattern output diagram showing another example, and FIG. 6 is a configuration example of a conventional elevator door control device. Block circuit diagram, 7th
The figure is a door control pattern output diagram according to the present invention. 1・
...Elevator control panel, 2...Door control device, 3...
・Door control circuit, 7... Main circuit control circuit, 8.
...Main circuit drive circuit, 9...Door main circuit, 10...Door power supply, 11...
Door motor, 12...Door position detector, 21.
...CPU. 22...Storage device, 22A
...Program section, 22B...Data storage section, 23
...D/A converter, 24...timer, 25...
・Reference timer, 26... Allowable time register, 2
7... Time measurement register, 28... Basic pattern register, 29... Reference clock circuit, 30... Input/output device.
Agent Patent Attorney Nori Ken Yudo Ken Deshimaru Figure 1 Figure 2 Figure Figure Figure

Claims (1)

[Claims] (1) In an elevator door control device that controls door opening/closing by selecting a door motor drive pattern based on elevator door opening/closing signals and door position detection signals, the door motor drive pattern and target opening/closing time of the door are determined according to each door position. a data storage means for storing each, a time detection means for measuring the door opening/closing time at each door position from the door position detection signal, and an actual door opening/closing time and a target door opening/closing time measured by the time detecting means. A measuring time for measuring the difference, a determining means for determining whether the difference between the actual door opening/closing time measured by this measuring means and the target door opening/closing time exceeds a permissible time, data changing means for changing the door motor drive pattern when it is determined that the door opening/closing time exceeds the allowable time with respect to the target door opening/closing time, If it is determined that the elevator is not completed even after the allowable time has passed, the door is fully opened and then the door motor drive torque is changed based on the door motor drive pattern changed by the data change means. door control device.