JPH0711220B2 - Automatic door opener with safety mechanism - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates generally to an automatic door opening / closing device having a safety mechanism. In the present invention, the door is a general automatic opening and closing door, that is, an elevator door, a store automatic door,
It refers to a girl wing type automobile door or the like, but here, in particular, a part of the door, that is, a window glass for automatically opening and closing the automobile door is also included.

Therefore, in order to improve the entry / exitability of an automobile, the present invention is an automatic window opening / closing device in which a safety mechanism operates when a foreign object is caught when the window is automatically opened / closed in synchronization with the opening / closing of the door, particularly when the window is closed. Regarding In the present invention, doors and windows are handled as equivalent objects as objects to be opened and closed.

2. Description of the Related Art A powered window opening / closing device is known in which a window is automatically opened when a foreign object is caught when the window is closed in an automobile. For example, according to the control device for a vehicle window glass disclosed in Japanese Patent Publication No. 50-11647, a pressing switch is provided in line with the packing that the edge of the window glass should contact when the window glass is closed. Therefore, when this switch is pressed, it is determined that a foreign object is caught.

On the other hand, according to the method for raising and lowering a powered window glass described in Japanese Patent Publication No. 55-1436, a timer is provided, and when the period during which the window glass rises is longer than the time set in the timer, it is considered that a foreign object is caught. To be judged.

Problems to be solved by the invention The invention is based on an automatic window opening and closing device as described at the beginning, and therefore the device according to the invention is particularly suitable for motor vehicles with frameless windows, so-called sashless windows. It is suitable. In such an automobile, there is no place for providing a push switch such as the control device for a window glass for a vehicle described in Japanese Patent Publication No. 50-11647, or even if there is an appropriate place, such a switch is not provided. Installation is extremely difficult. Furthermore, this known device requires additional parts, which complicates the construction. Moreover, since this part is, so to speak, a mechanical part, if it is to be attached to an existing automobile later, it is necessary to change the mechanism of the automobile body, and it is virtually impossible to attach it to the existing automobile.

On the other hand, in the power window glass lifting method described in Japanese Examined Patent Publication No. 55-1436, the judgment of trapping is made only after the time set in the timer, so this method is fundamentally for the protection of passengers. Useless. This is because, for example, when a human body is caught, the human body must be kept caught during the set time, and it is not guaranteed that the human body will not be seriously damaged during that time.

SUMMARY OF THE INVENTION An object of the present invention is to provide an automatic door opening / closing device having a safety mechanism as described at the beginning, which can be easily constructed and operates reliably, that is, can reliably prevent damage to a human body or the like due to pinching.

Furthermore, the device according to the invention makes it possible to easily integrate it into an existing motor vehicle equipped with a powered door opening device or a powered window opening device.

Means for Solving the Problems According to the present invention, this object is achieved as follows. That is, a timer connected to the door opening / closing command switch is provided, and the door driving device is connected to the power source through the door opening current circuit including the timer, the automatic shutoff device, and the door opening / closing command switch on the one hand, On the other hand, a time comparator connected to the power supply through a door closing current circuit composed of an automatic shutoff device and a door opening / closing command switch, and connected to the door driving device side of the door closing current circuit and a timer, and this time comparator. There is an emergency switch circuit connected to the
It is connected to the operating member of the door open / close command switch, and the output of the time comparator temporarily switches the door open / close command switch to the open side, so that the current supply period when closing the door is longer than the timer set time. If it is short, the door will be opened temporarily.

Action The automatic door opening / closing device according to the present invention uses an automatic shutoff device, that is, a device that shuts off the current supply to the motor when the motor is stopped by an external force, for example, by detecting an excessive current. The automatic shut-off device ensures that the door operation is terminated when the door is completely closed or fully opened.

The present invention is premised on the idea that the time required to open a fixed amount of door and the time required to close the same amount are substantially equal. Although it may take some extra time to close the door, it is rarely faster to close. Therefore, when the voltage supplied to the door drive device is shut off by the automatic shutoff device within a time shorter than the time for opening the door, it is determined that a foreign object is sandwiched.

When the automatic door opening / closing device according to the present invention is used in the automatic window opening / closing device as described above, the opening / closing device is activated by a window opening / closing command switch operated when the door is unlocked or when the door is opened, and is operated by a timer. The window is opened by driving the motor for a fixed period of time. The window opening / closing command switch is operated in the opposite direction when the door is locked or when the door is closed. In the case of normal operation, the window is closed over this time or longer.

The time comparator compares the voltage of the timer, which is activated even when the window is closed, with the window closing drive voltage, and when the drive voltage drops to 0 earlier than the timer voltage, the foreign matter is caught. To judge. At this time, the time comparator activates the emergency switch circuit and opens the window again.

Embodiments Embodiments of the present invention will be described below with reference to the drawings. The device according to the invention is used here as an automatic window opening and closing device.

The drive unit 1 of the window opening / closing motor is connected to the power supply Vcc through the automatic shutoff device 2, the normally open contact of the window open / close relay 4 and the normally open contact of the timed window open relay 5 on the one hand, and the automatic shutoff on the other hand. It is connected to the power supply Vcc through the normally closed contacts of the device 2 and the window opening / closing relay 4.

One terminal of the coil of the window opening / closing relay 4 is connected to the power supply Vcc, and the other terminal is connected to the ground via the diode D1 and the door switch 3. Similarly, one terminal of the coil of the timed window opening relay 5 is connected to the power source Vcc, and the other terminal is connected to the ground via the switch section of the transistor T1. The control terminal of this transistor T1 is EXOR
It is connected to the output terminal of a timer 6 consisting of a gate and an attached CR circuit, and the trigger input terminal of this timer 6 is connected to the door switch 3 via a diode D2.

In this embodiment, since the door switch 3 is closed when the door is opened, the relay 4 is energized via the switch 3 at this time. At this time, the energizing signal and the restoration signal of the relay 4 are simultaneously supplied to the reset input terminal of the automatic shutoff device 2 through a signal processing circuit (not shown), and therefore the automatic shutoff device 2 is reset each time the door is opened and closed. The power can be supplied until the next interruption.

Thus, when the door is closed, the respective switches and contacts are in the state just shown, at which time the motor drive unit 1 is energized via the normally closed contacts of the automatic shut-off device 2 and the relay 4 to close the window. When the window is completely closed, the automatic shutoff device 2 stops the power supply to the motor drive unit 1.

On the other hand, when the door is opened, the door switch 3 is closed. At this time, the relay 4 is energized and the attached contact switches to the normally open side. At this time, at the same time, the timer 6 is triggered via the diode D2 to make the transistor T1 conductive. Therefore relay 5
Is also energized and the attached contacts are closed. Thereby, the motor drive unit 1 is supplied with power via the automatic shutoff device 2, the normally open contact of the relay 4, and the normally open contact of the relay 5 to open the window. When the time set in timer 6 elapses, relay 5
Is restored and the window then stops at the predetermined open position.

The device according to the invention additionally forms a time comparator.
A NAND gate 8 is provided, one input terminal of this NAND gate is connected to the close side input terminal of the motor drive unit 1 via the inverter 7, and the other input terminal is an output terminal of the timer 6. It is connected to the. this
The output terminal of the NAND gate 8 has two NAND gates and the attached
It is connected to the trigger input terminal of the monostable multivibrator 9 consisting of a CR circuit. The output terminal of the monostable multivibrator 9 is connected to the control terminal of the transistor T2, the switch section of the transistor T2 is connected in series with the diode D3, and this series circuit is connected to the coil of the relay 4 and ground. Connected between.

Automatic shutoff device 2 reset at this time when the door is closed
The voltage is supplied to the motor drive unit 1 through the normally closed contact of the relay 4. The NAND gate 8 compares the voltage with the output of the timer 6 triggered at this time, so to speak.
If the voltage becomes 0 while the output of the timer 6 continues, the output of the inverter 7 becomes 1, and the NAND gate 8 produces an output at this time. This means that the window closing time was shorter than the opening time, and that the automatic shutoff device 2 stopped feeding power when something was pinched when the window was closed.

The output of the NAND gate 8 is spread to a predetermined width by the monostable multivibrator 9, and this signal causes the transistor
T2 is made conductive, the relay 4 is energized for a predetermined period, and the contact is switched to the open side. At the same time, the automatic shutoff device 2 is reset. The window is then opened for a period of time and the pinch can be removed.

EFFECTS OF THE INVENTION The structure of the automatic door opening / closing device according to the present invention is simple, and moreover, the trapping can be reliably detected. Further, since most of the components to be added for detecting the trapping are electronic components, they can be easily incorporated into the existing electric door opening / closing device.

The opening time and the reference time for pinch detection are
Since they are formed by the same timer, there is essentially no need for adjustment during installation.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of an automatic door opening / closing device according to the present invention. 1 ... Motor drive unit, 2 ... Automatic shutoff device, 3 ...
... door switch, 4,5 ... relay, 6 ... timer, 7 ...
... Inverter, 8 ... Time comparator, 9 ... Monostable multivibrator

Claims (1)

[Claims] 1. An automatic door opening / closing device in which a safety mechanism operates when at least a part of a door is automatically opened / closed, especially when a door is closed, and a safety mechanism is provided with a timer connected to a door opening / closing command switch. The door drive is connected to the power supply through the door opening current circuit consisting of this timer, the automatic shutoff device and the door opening / closing command switch on the one hand, and the automatic shutoff device and the door opening / closing command switch on the other hand. It is connected to the power supply through the door closing current circuit, and is provided with a time comparator connected to the door driving device side of the door closing current circuit and a timer, and an emergency switch circuit connected to this time comparator. This emergency switch circuit is connected to the operating member of the door open / close command switch, and the door open / close command switch is temporarily operated by the output of the time comparator. The automatic door opening / closing device with a safety mechanism is characterized in that the door is temporarily opened when the current supply period when closing the door is shorter than the set time of the timer.