JPH07108754B2 - Elevator door controls - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Industrial field of application) The present invention relates to an elevator door control capable of surely performing a door opening / closing operation even when the door driving load increases when the elevator door is opened / closed. Regarding the device.

(Prior Art) The configuration of a conventional elevator door control device will be described with reference to FIG.

In FIG. 6, reference numeral 1 is an elevator control panel for controlling the elevator. From the elevator control panel 1, a door opening / closing signal 1A is input to the door control device 2. The door control device 2 comprises a door control circuit 3, a pattern setting circuit 4, a pattern selection circuit 5, a control pattern circuit 6, a main circuit control circuit 7, a main circuit drive circuit 8 and a door main circuit 9, and the door opening / closing signal 1A is , To the door control circuit 3 in the door control device 2. A door position signal 12A from a door position detector 12, which will be described later, is input to the door control circuit 3, which causes the door control circuit 3 to open / close and restart the door, and to determine a door motor drive pattern shape and supply voltage value. The selection signal 3A of is output. When the selection signal 3A is input to the door pattern selection circuit 5, the door pattern selection circuit 5 selects the data of the supply voltage set in the door pattern setting device 4, and based on this, the control pattern circuit 6 causes the door motor drive pattern. Is sent to the door main circuit control circuit 7.

As a result, the door main circuit control circuit 7 is driven by the main circuit drive circuit 8 based on the input door motor drive pattern.
To the main circuit drive circuit 8, and the main circuit drive circuit 8 outputs a control output corresponding to the switching signal to the door main circuit 9. Based on this, the door main circuit 9 gives a drive output to the door motor 11,
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 to control the output of the door motor.
Giving to 11.

In such a door control device, door control is performed based on the following door driving speed pattern. FIG. 4 shows an example thereof. In FIG. 4, the horizontal axis indicates the position of the door, the point O is the closed end, the point D is the open end, and the point A is the engagement point between the car door, which is the elevator door, and the hold door, which is the floor door. , B shows the end point of acceleration, and C point shows the start point of deceleration. The vertical axis shows the door speed, and the acceleration area is shown between points A and B. Then, at point B, the highest speed V _T is reached. The constant speed area is between points B and C, and the deceleration area is between points C and D.

FIG. 5 shows another example of the door drive pattern, in which the horizontal axis shows the door position similar to that in FIG. 2, and the vertical axis shows the output voltage, on the basis of which the voltage is supplied to the door motor. Then, torque is generated, and the control at the door speed shown in FIG. 4 can be realized. Here, a small acceleration is applied between points O and A in order to reduce the engagement sound in the section until the car door and the hold door are engaged. The pattern after the point D is for applying an open lock current and is a voltage for keeping the door open.

(Problems to be Solved by the Invention) In the elevator door control device having the above-described structure, when the door driving load is constant, the door driving speed pattern shown in FIG. 4 or the door driving speed pattern shown in FIG. Although door control is possible based on the door drive pattern shown, for example, when air is drawn into the elevator car when the door is closed from the open state, the door drive load increases due to that pressure and the drive torque of the door motor is insufficient. Therefore, it is difficult to close the door. Therefore, especially when the influence of wind hits 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 may make the elevator inoperable or cause a door failure. Sometimes.

Therefore, it is conceivable to greatly adjust the drive torque of the door motor in consideration of such fluctuations in the door drive load. However, in this case, the opening / closing operation force of the door becomes too large, and passengers move to the door. If it is caught, it is dangerous and there is a problem in terms of safety.

The present invention increases the door motor drive torque only when the door drive load increases so that the original door opening / closing operation can be reliably performed, so that the elevator operation is not performed due to the increase in the door drive load. It is an object of the present invention to provide an elevator door control device that does not become possible or cause a door failure and has no problem in safety.

[Structure of the Invention] (Means for Solving the Problems) Therefore, first, in order to achieve the above object, the invention according to claim 1 detects the door opening / closing signal of an elevator and the door position. In a door control device for an elevator that controls the opening and closing of a door by selecting a door drive pattern by a signal, a data storage unit that stores a door drive pattern and a target opening and closing time of the door in accordance with each door position, and a door position of the previous period. A time measuring means for measuring the door moving time at each door position from the detection signal, and a judging means for judging whether or not the actual door moving time measured by the time measuring means exceeds the target opening / closing time of the door. A data changing unit that changes the door drive pattern when the determination unit determines that the actual door movement time exceeds the target door opening / closing time. The actual door control device for an elevator which is adapted to change the door motor driving torque based door travel time exceeds the target closing time of the door and the door drive pattern changed by the data changing unit.

The invention according to claim 2 is the door control device for an elevator according to claim 1, wherein the data changing means includes the door moving time and the door driving pattern measured by the time measuring means. And the function of, and if the determination means determines that the actual door movement time exceeds the target opening / closing time of the door, the elevator drive pattern is changed according to the door movement time at that time. It is a door control device.

(Operation) Therefore, in the elevator door control device having such a configuration, it is determined that the door drive load increases only when the actual door movement time exceeds the target door opening / closing time, and the door motor drive pattern Since the door motor drive torque is increased by the change, the original door opening / closing operation can be reliably performed.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing a configuration example of an elevator door control apparatus according to the present invention. The same portions as those in FIG. 6 are designated by the same reference numerals, and the description thereof will be omitted. Only different points will be described here. That is, in the present embodiment, as shown in FIG. 1, a door constituted by a microcomputer instead of the parts corresponding to the pattern setting circuit 4, the pattern selecting circuit 5 and the control pattern circuit 6 of the conventional device described in FIG. The pattern setting device 20 is provided.

This door pattern setting device 20 has a CPU 21, which is the center of control,
It comprises a storage device 22 for storing programs and data and a work area, a DA converter 23 for converting output data of the CPU 21 into an analog output, and a timer 24. In this case CP
To U21, door position signals of about 10 points indicating the operating points of the door, such as points A to D shown in FIG. 4, are input from a cam switch (not shown).

FIG. 2 is a block 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 bus, and all information is processed as a data amount of, for example, about 8 bits. In addition, the storage device 22 in FIG.
It is roughly divided into a data section 22B composed of M. The program unit 22A has a processing capacity of, for example, about 4 kbytes and can execute all the door operations, and the data unit 22B has a processing capacity of, for example, about 1 kbyte and temporarily stores data. Is.

The data section 22B stores the allowable time data when the door passes each cam switch (allowable door opening / closing time data), the allowable time register 26, and the actual door movement time from the state of the cam switch detected by the CPU 21. A time measurement register 27 for measurement and a basic pattern register 28 in which a plurality of door drive patterns are stored are provided. In this case, the permissible time register 26 stores the permissible time (the target opening / closing time of the door) when the door passes each cam switch based on the clock signal from the reference timer 25 fetched by the CPU 21 for each basic clock. The allowable data calculated in is stored. That is, the permissible 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 to Z, the first cam switch A-
The allowable data when moving between the cam switches B is, for example, 1
The data is stored in the corresponding register section as byte data, and the value is set to, for example, about 1 sec.

Further, when the door drive pattern stored in the basic pattern register 28 is selected by the CPU 21, the reference clock circuit 29 that outputs the clock signal that becomes the reference of the time measurement register 27 to the data bus, the pattern signal is D / A converted. Then first
An input / output device 30 is connected to convert the signals of the D / A converter 23 and the cam switch, which are output to the main circuit control circuit 7 in the figure, into a form suitable for processing by the CPU 21, and to input / output the signals.

Next, the operation of the elevator door control device configured as described above will be described with reference to the flowchart shown in FIG.
FIG. 3 shows the flow of processing when the door is closed.

In FIG. 3, in step 1, it is determined whether or not a door closing command is issued from the elevator control panel 1, and the operation of this routine is started only when the door closing command is issued. Therefore, this routine is invalidated when the door safety or the like is activated.

If it is determined in step 1 that the door closing command is issued, in step 2 the optimum door drive pattern between the corresponding cam switches is output. Or not. Here, it is determined that the door exists between the cam switch A and the cam switch B. If it is determined in step 2 that the door is present between the cam switch A and the cam switch B, in step 3 the door is moved to the cam switch.
Measure the time to move between A and cam switch B. For example, the moving time of the door can be obtained by counting the reference clock signal from when the cam switch A is turned on to when the cam switch B is turned on. In this case, the reference clock circuit 29 interrupts the CPU 21, for example, every 10 msec to notify the reference time, and the moving time between the cam switch A and the cam switch B is counted, and the amount of time is stored in the time measurement register 27. To be done. When the door movement time between the cam switch A and the cam switch B is measured in step 3, in step 4, the CPU 21 allows the door movement time between the cam switch A and the cam switch B stored in the time measurement register 27. Whether or not it is within the permissible time (target door opening / closing time) between the corresponding cams stored in the time register 26, and if it is within the permissible time, the basic pattern drive from the basic pattern register 28 is set as standard. The pattern is read and output to the D / A converter 23. If it is determined that the allowable time (door open / close time) is exceeded, the maximum door drive pattern is selected and output to the D / A converter 23.

From step 5 onward, the operation range of the cam switch is a processing routine between the cam switch B and the cam switch C, and the same processing as the above-described steps 1 to 4 is performed to set the door drive pattern between the cam switch B and the cam switch C. I have decided.

Such processing is similarly performed within the operation area of all cam switches.

As described above, when the actual door movement time exceeds the permissible time (the target opening / closing time of the door) in the process routine in the operation area of all the cam switches, it is determined that the door is stopped, The door is opened and closed with the maximum door drive pattern, that is, the maximum torque value of the door motor to complete the process.

In this way, in this embodiment, it is turned on according to the opening / closing position of the door,
In the operating range of each cam switch to be turned off, it is determined whether the actual movement time of the door is within the predetermined allowable time (target opening / closing time of the door), and the allowable time (target opening / closing time of the door) is set. When it exceeds, the door is driven to open and close with the maximum door drive pattern, so that even if the door drive load increases due to wind pressure or the like, there is almost no effect and the door can be reliably opened and closed.

Also, the actual movement time of the door is once permissible time (door open / close time) regardless of the operating range of any cam switch.
If the value exceeds the maximum torque pattern, the maximum torque pattern is retained, so it is relatively easy to switch to the maximum torque pattern at the beginning of door operation, and the opening / closing operation of the door must be completed before the elevator user detects an abnormality in the door due to wind pressure. The advantage is that

In the above-described embodiment, when the actual door movement time exceeds the allowable time (door open / close time), the door motor is switched to the maximum torque pattern for processing.
Prepare different torque patterns with different values, and if it is determined that the actual door movement time exceeds the target door opening / closing time, increase the torque in proportion to the actual door movement time at that time. By doing so, the operation of the door can be made smooth.

Further, if the target opening / closing time of the door is constant regardless of the position of the cam switch, the flowchart shown in FIG. 3 can be simplified and can be implemented by a relay or the like without using the CPU 21 or the like.

Furthermore, when the actual door movement time exceeds the allowable time (target opening / closing time of the door), a function of the measured door movement time and the driving torque amount, for example, a slight delay in the door movement is caused by using the exponential smoothing method. The effect can be eliminated. In this case, the function correspondence is simply the basic pattern register 28
It suffices to set the area of (1) corresponding to the door movement measurement time and prepare step 4 shown in FIG. 3 for each time.

As described above, according to the present invention, the drive torque of the door motor is increased so that the original door opening / closing operation can be reliably performed only when the door drive load is increased.
The elevator drive will not be disabled due to an increase in the door drive load due to the wind pressure sucked in from the hall, and the doors will not open and close smoothly due to dust accumulated near the door sill. Even in such a case, it is possible to expel dust 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 description of drawings]

FIG. 1 is a block circuit diagram showing an embodiment 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 same. FIG. 4 is a flow chart for explaining the operation, 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 block showing a configuration example of a conventional elevator door control device. It is a circuit diagram. 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
...... Memory device, 22A …… Program section, 22B …… Data storage section, 23 …… D / A converter, 24 …… Timer, 25 …… Reference timer, 26 …… Permissible time register, 27 …… Time measurement Register 28 ... Basic pattern register 29 ... Reference clock circuit 30 ... Input / output device.

Claims (2)

[Claims] 1. An elevator door control device for controlling the opening and closing of a door by selecting a door drive pattern based on an elevator door open / close signal and a door position detection signal, and a door drive pattern and a target door open / close depending on each door position. Data storage means for respectively storing time, time measuring means for measuring the door moving time at each door position from the door position detection signal, and actual door moving time measured by the time measuring means Determination means for determining whether or not the target opening / closing time is exceeded, and data changing means for changing the door drive pattern when the determination means determines that the actual door movement time exceeds the target opening / closing time of the door When the actual door movement time exceeds the target opening / closing time of the door, it is based on the door drive pattern changed by the data changing means. Elevator door control device being characterized in that so as to change the door motor driving torque Te. 2. The data changing means makes the door moving time and the door driving pattern measured by the time measuring means into a function, and the judging means means that the actual door moving time exceeds the target opening / closing time of the door. The elevator door control device according to claim 1, wherein when the determination is made, the door drive pattern is changed according to the door movement time at that time.