JPH10120346A - Door controller of elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To minimize the extent of pinching pressure force ranging from a user or the like having caught in the door to the release from it after the door is reversed, by setting a door-closing torque to zero as long as the specified time in the case where a contact type safety device has operated during the door closing. SOLUTION: In time of door closing, a user or the like is caught in the door and thereby a shoe operates, a microprocessor unit 1 sets a current limiter value in the closing direction to zero as long as the specified time, and thereby a deviation between a current command value and an actual speed grows larger, through which such a possibility that door driving force grows larger in the closing direction is prevented from occurring. In addition, with a shoe operating signal 103 outputted to an elevator control unit 10, a closing command 101 is turned to OFF and an opening command 102 to ON, respectively. When any torque in the closing direction till the opening command 102 is turned on, is set to zero, whereby pinching pressure to be added to the user becomes zero, and thus a burden on the user is reduced. With this constitution, the pinching pressure ranging from the user being caught in the door to this caughtness being released after the door being reversed can be minimized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a contact type safety device which operates when a door of an elevator is closed and a user is sandwiched between the doors.
The present invention relates to an elevator door control device capable of reducing a squeezing pressure applied to a user until a door is turned over.

[0002]

2. Description of the Related Art As a conventional technique, as described in Japanese Patent Application Laid-Open No. 5-221595, when a contact-type safety device is operated, the deceleration of a door is increased, and the door is quickly reversed to improve the safety of a user. There is an elevator door control to secure.

[0003]

In the elevator door control device described above, the deceleration after detecting that a user or the like has been caught in the door is reduced to a certain extent in order to suppress noise, impact, and the like during deceleration. However, no consideration has been given to the point that the degree of reduction of the clamping force applied to the user or the like until the door is turned over and the pinch is released is reduced to a certain extent.

[0004] An object of the present invention is to set the closing torque to 0 after the detection of the user's being caught until the door opening command is input. To provide an elevator door control device capable of easily and reliably protecting a user by minimizing a clamping pressure until the clamping is released by reversing and having no problem in terms of safety. It is in.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a door speed by means for detecting a door position and a speed from a rotation speed of an elevator door driving motor, and a door speed command. A torque command set according to a deviation from the value, a means for setting a voltage to be applied to the motor in accordance with a deviation from a torque obtained by converting a current from the motor current detection means into a torque with respect to the torque command, When the safety device operates, a means is provided for setting the door closing torque to 0 after a predetermined time has elapsed or until a door opening command is input.

In the elevator door control device according to the present invention, when the contact-type safety device operates while the door is closed, the door closing torque is set to 0 after a predetermined time elapses or until a door opening command is input, thereby enabling the user or the like to operate. Since the rise of the clamping force applied to the fin can be suppressed, the protection of the user and the like can be surely performed.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing a configuration of an embodiment of the present invention. FIG. 2A is a diagram showing a door motor driving pattern when the door is closed according to the present invention, and FIG. 2B is a diagram showing a motor current curve. is there.

FIG. 3 (a) shows a conventional door motor drive pattern from the detection of jamming to door reversal, FIG. 3 (b) shows a motor current curve, and FIG. 3 (c) shows a door open / close command signal and a contact type safety device operation signal ( FIG. 5 is a diagram showing a timing chart of a shoe operation signal. 4A is a door motor drive pattern from the detection of pinching to door reversal according to the present invention, FIG. 4B is a motor current curve, and FIG.
FIG. 3 is a diagram showing a timing chart of a door opening / closing command signal and a shoe operation signal.

FIG. 5 is a flowchart for explaining the detection of the shoe operation signal and the operation based on the detection result.

In FIG. 1, reference numeral 1 denotes a microprocessor (MP
U), 2 is ROM, 3 is RAM, 4 is base drive circuit, 5 is input / output buffer (I / O), 5 is power supply, 7 is diode bridge, 8 is capacitor, 9 is door motor drive element, 10 is elevator Control device, 11 is the door position,
Speed detection means, 12 is a door motor, 13 is an open end detection switch (OLS), 16 is a closed end detection switch (CLS),
17 is a switch operation cam, 18 is a strip, 19 and 20 are rotating bodies, 21 is a door, 22 is a door rail, 31 is a door motor current detector, and 32 is a digital signal of the detection signal of the current detector 31. An A / D converter for conversion.

In one embodiment of the present invention shown in FIG. 1, an elevator door 21 is supported by a door rail 22 and a strip 18 is provided.
Is connected to the strip 18 at a connection portion 23 with

The strip 18 is wound around a rotary body 20 installed at both ends of the elevator car entrance, and the rotary body 20 is connected to the door motor 12 and the rotary body 19 in a state.

The rotators 19 and 20 convert the rotation of the motor 12 into horizontal movement via the strip 18, and open and close the door 21 horizontally. An open end detection switch 13 (hereinafter referred to as O) that detects the open end of the door 21 is provided at the entrance of the elevator.
LS) and a closed end detection switch 16 (hereinafter referred to as CLS) for detecting a closed end of the door 21 are provided.
A cam 17 for operating each switch is attached to the door 21. Since the cam 17 operates the above-mentioned switch in synchronization with the position of the door 21, the open end and the closed end of the door 21 can be detected.

The door control device drives and controls the door motor 12 that drives the door. The door motor drive element 9, a single-phase AC power supply 6 for supplying DC power to the door motor drive element 9, and a full-wave rectifier Drive circuit 4 for controlling ignition of diode bridge 7, smoothing capacitor 8, door motor drive element 9 for use, base drive circuit 4
MPU1, ROM2, RAM3, input / output buffer I, which are peripheral devices of
/ O5, attached to the door motor 12, the door motor 1
The pulse signal is transmitted to the MPU 1 via the I / O 5 with the rotation of the MPU 1
A current detector 31 that generates a voltage proportional to a current flowing through the door position and speed detection means 11 and a current flowing through the door motor 12 and a voltage generated by the current detector 31 are converted into an 8-bit digital signal, which is sent to the MPU 1. An A / D converter 32 for inputting is provided. The switches CLS,
The OLS operation signal and the door open command 102, the close command signal 101, and the shoe operation signal 103 output from the contact-type safety device shoe and the elevator control device 10 are input to the MPU 1 via the I / O5. The MPU 1 controls the opening and closing of the door according to 101 and 102.

FIGS. 2A and 2B show a speed curve and a motor current curve in the embodiment of the present invention.

FIG. 2A shows a speed curve when the door is normally closed. When the MPU 1 detects that the door closing command 101 is turned on when the door 21 is at the open end, the MPU 1 issues a speed command at a predetermined acceleration α. When the speed command reaches V1, the speed command V1 is generated until the door position data by the door position / speed detecting means 11 reaches a predetermined value.
When the door position data reaches a predetermined value, the speed command is reduced at a predetermined deceleration β, and when the speed command becomes V2, the speed command V2 is generated up to the closed end. The door position data for starting deceleration is calculated by calculating the distance required by the MPU 1 for deceleration from the deceleration β and subtracting it from the entrance width data stored in the ROM 2 in advance.

The MPU 1 calculates a difference between the speed command generated above and the actual door speed detected by the door position and speed detection detecting means 11, calculates a torque command proportional to the difference, and calculates a motor current from the calculated torque command. Calculate the command. Next, the MPU 1 determines whether the motor current command and the current detector 31
The base drive circuit 4 that detects the difference from the actual motor current detected by the / D converter 32, calculates a voltage command proportional to the difference, and controls the motor drive element 9 according to the calculated voltage command. Control. As described above, the MPU 1 causes the actual speed of the door to follow the generated speed command. When a shoe or the like is operated with a user or the like sandwiched between the doors, the MPU 1 sets the speed command value of the door to 0 at the deceleration β1. On the other hand, the actual speed of the door becomes 0 due to being caught, and the deviation between the speed command value (solid line) and the actual speed (dotted line) increases as shown in FIG. The motor current for causing the actual speed of the door to follow the speed command increases as shown in FIG. Elevator control device 10
Turns off the close command and turns on the open command in response to the shoe operation signal 103 (FIG. 3C). Here, until the opening command is turned on, the speed command value is decelerated from the closing direction, and the clamping pressure is applied to the user or the like until the opening command is turned on, and there is a problem that the burden on the user is large. .

The present invention minimizes the clamping force from the detection of the shoe operation signal of the MPU 1 to the reversal of the opening / closing direction, which will be described below with reference to FIGS. When the shoe is operated when a user or the like is pinched by the door when the door is closed, the MPU 1 sets the current limiter value in the closing direction to 0 for a predetermined time T2, and sets the speed command value (solid line) as shown in FIG. And the actual speed (dotted line) increases to prevent the door driving force F from increasing in the closing direction (5 in FIG. 5).
1, 52, 53). Also, by outputting the shoe operation signal 103 to the elevator control device 10, the elevator control device 10 turns off the close command 101, and
2 is turned on (FIG. 4C). By setting the torque in the closing direction until the opening command 102 is turned on to zero, the clamping pressure applied to the user or the like becomes zero, and the burden on the user is reduced.

[0020]

According to the present invention, when the shoe operates, the door driving torque in the closing direction is set to 0,
It is possible to minimize the clamping pressure from when the user is sandwiched by the door to when the door is turned over and the sandwiching is released,
An elevator door control device capable of easily and reliably protecting a user and providing an elevator door control device having no problem in safety can be obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

FIG. 2 is a characteristic diagram of a door motor drive when the door is closed.

FIG. 3 is a diagram showing a conventional door motor drive characteristic from a pinch detection to a door reversal.

FIG. 4 is a diagram illustrating a door motor drive characteristic from the detection of the pinch to the reversal of the door according to the present invention.

FIG. 5 is a flowchart of an operation of changing a door motor drive pattern.

[Explanation of symbols]

1 microprocessor, 2 ROM, 3 RAM, 4
... Base drive circuit, 5 ... I / O buffer, 5 ... Power supply, 7 ... Diode bridge, 8 ... Capacitor, 9 ... Door motor drive element, 10 ... Elevator control device, 11 ...
Door position and speed detecting means, 12: Door motor, 13: Open end detection switch, 16: Closed end detection switch, 17: Switch operating cam, 18: Strip, 19, 20: Rotating body, 2
DESCRIPTION OF SYMBOLS 1 ... Door, 22 ... Door rail, 22 ... Contact type safety device, 31 ... Door motor current detector.

Claims (2)

[Claims] A motor for opening and closing an elevator door; and a door control circuit for determining a torque command value of the motor according to a deviation between a speed command value and an actual speed.
An elevator door control device provided with a contact-type safety device that outputs a reversal request signal to open the door when a user of the elevator comes into contact with the door. An elevator door control device wherein a command value is set to a predetermined value or less. 2. A motor for opening and closing a door of an elevator, and a door control circuit for determining a torque command value of the motor according to a deviation between a speed command value and an actual speed.
When an elevator user touches a door, in an elevator door control device provided with a contact-type safety device that outputs a reversal request signal to open the door, until the door-open command is input after the contact-type safety device operates. An elevator door control device, wherein a closing torque command value is equal to or less than a predetermined value.