JPH0738622Y2 - Automatic door device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic door device.

[0002]

2. Description of the Related Art First, a conventional example (1) of an automatic door device will be described with reference to FIG. Reference numeral 2 denotes a detector for detecting the presence or absence of the subject 1 such as a person or a vehicle near a door (not shown). The detector 1 is a detector that detects the presence or absence of reception of infrared rays of direct waves or the reception of infrared rays of reflected waves from an infrared light emitter (not shown). In addition, this detector 2
May receive radio waves, ultrasonic waves, etc. from the transmitter.

The detection output of the detector 2 is passed through an amplifier 3,
The detection level is supplied to the comparator 4 and is compared with a reference level. The detection level is controlled to turn on / off the switch 5 connected to a door driving device (not shown), and the presence of the subject 1 near the door. If it is confirmed, the door is opened by the door driving device, and if it is not detected, the door is closed by the door driving device.

When the automatic door device of the conventional example (1) malfunctions due to environmental changes or external noise, the door does not open or the door opens even though the subject 1 is near the door. The door may be closed while the subject 1 is passing.

Therefore, referring to FIG. 3, an automatic door device of the conventional example (2) will be described. A plurality of detectors 2A, 2B of the same type or different types for detecting the presence or absence of the same subject 1 are provided, and the detection outputs of the respective detectors 2A, 2B are respectively amplified by an amplifier 3A,
3B to the comparators 4A and 4B to compare with reference levels having the same or different detection levels, and to supply the respective comparison outputs to the logical product circuit 6, and in the logical product circuit 6, the respective large and small If the relationship is the same, the on / off of the switch 5 connected to the door driving device is controlled depending on the size, and if the presence of the subject 1 near the door is confirmed, the door is opened by the door driving device, and if it is not detected, the door is opened. Make sure the drive closes the door. By doing so, the problem caused by the malfunction of the automatic door device is once solved.

[0006]

However, the automatic door device of the conventional example (2) also has drawbacks, and there is a difference in sensitivity between the plurality of detectors, and one of the plurality of detectors is not detected. If any failure occurs, the door will not open or the door will open and the subject 1
The door may close during the passage.

In view of the above point, the present invention provides an automatic door apparatus having a plurality of detectors for detecting the presence or absence of an object, in which an environmental change, external noise, a defect or failure of a plurality of detectors, and a plurality of detectors. If there is a possibility that a malfunction may occur due to any difference in sensitivity or the like, it is intended to propose a device that can surely open the door.

[0008]

According to the present invention, a plurality of detectors 2A for detecting the presence or absence of a subject 1 near a door are provided.
2B, a logical product circuit 6 to which the detection outputs of the plurality of detectors 2A and 2B are supplied, and a door driving device controlled by the output of the logical product circuit 6 are provided.
In the automatic door device in which the door is opened or closed by the door driving device when all the detection outputs of A and 2B match, a comparator 7 for comparing the detection output levels of the plurality of detectors 2A and 2B is used. Set up. Then, the door driving device is also controlled by the comparison output of the comparator 7, and the comparator 7 detects a level difference of a predetermined value or more between the detection outputs of the plurality of detectors 2A and 2B. At this time, the door is opened by the door driving device. Note that the subject and the circuits associated therewith may each be larger than two.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. 1, but the portions corresponding to those in FIGS. 2 and 3 will be designated by the same reference numerals. A plurality of detectors 2A, 2B of the same type or different types for detecting the presence or absence of the same subject 1 are provided, and the detection outputs of the respective detectors 2A, 2B are respectively amplified by amplifiers 3A, 3B.
It is supplied to the comparators 4A and 4B through B, compared with reference levels having the same or different detection levels, the respective comparison outputs are supplied to the logical product circuit 6, and the logical product output is supplied to the logical sum circuit 8. , Is supplied as a control signal to the switch 5 connected to the door driving device. The AND circuit 6
In the above, if the respective magnitude relations match, the ON / OFF of the switch 5 connected to the door driving device is controlled by the magnitude, and if the presence of the subject 1 near the door is confirmed, the door driving device opens the door, If not detected, the door drive will close the door.

Further, the detector 2 from the amplifiers 3A, 3B
The detection outputs of A and 2B are supplied to the comparator 7 to compare the levels, and when the level is higher than a predetermined level, the switch 5 connected to the door driving device is controlled to open the door. The predetermined level is determined in advance by the constants and characteristics of the plurality of detectors and the circuits connected to them.

[0011]

According to the present invention, in an automatic door device provided with a plurality of detectors for detecting the presence or absence of a subject,
Environmental changes, external noise, defective or defective multiple detectors,
If there is a risk of malfunction due to any of the differences in sensitivity among the plurality of detectors, the door can be reliably opened. Therefore, the safety of the automatic door device is ensured.

[Brief description of drawings]

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

FIG. 2 is a block diagram showing a conventional example (1).

FIG. 3 is a block diagram showing a conventional example (2).

[Explanation of symbols]

 1 subject 2A detector 2B detector 4A comparator 4B comparator 5 switch 6 AND circuit 7 comparator 8 OR circuit

Claims (1)

[Scope of utility model registration request] 1. A plurality of detectors for detecting the presence or absence of an object in the vicinity of the door, a logical product circuit to which detection outputs of the plurality of detectors are supplied, and a door controlled by the outputs of the logical product circuit. An automatic door device having a driving device and opening or closing the door by the door driving device when all the detection outputs of the plurality of detectors match, the detection output of the plurality of detectors Is provided so that the door drive device is controlled by the comparison output of the comparator, and the comparator outputs a predetermined value or more between the detection outputs of the plurality of detectors. An automatic door device configured to open the door by the door drive device when a level difference is detected.