JPH0978939A - Obstacle detecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve obstacle detection and door opening simultaneously by installing distance-measuring detectors at a door end at appropriate intervals along the vertical direction. SOLUTION: Range finders 3, 4, 5 are installed at a door end 6. When the door 1 is fully or half open, the range finders 3, 4, 5 output the same value since the door 1 is installed parallel to a doorstop 7. When an obstacle, e.g., a passenger, is on the line of movement of the door 1, the distance from the door 1 to the obstacle is measured using the finders 3, 4, 5. The finders 3, 4, 5 output different values since the obstacles such as passengers seldom constitute straight lines parallel to the door 1. Then the door 1 is controlled to be moved to a stopping or open position. Thus obstacle detection and door opening can be achieved by means of the same device.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to automatic doors.

[0002]

2. Description of the Related Art In a conventional automatic door, an obstacle detector is not installed between the door and the door stop in the case of one-way pulling, and between the doors in the case of double pulling. A function is added to project light rays between the doors or between doors, and as an obstacle detector along with passerby detection,
It is installed invisible above the door. The amount of light reflected by the projected light beam hitting an obstacle is detected. When there is no obstacle, the amount of light reflected from the floor is detected. The obstacle is detected by determining the difference in the amount of reflected light caused by the presence or absence of the obstacle.

[0003]

In the conventional obstacle detector, an obstacle is detected by a light beam emitted from a blindly attached detector between doors and doors or between doors. However, in order to detect the door-to-door contact or the door-to-door full range at the time of opening, a large number of light rays are required, which is expensive. In addition, there is a drawback that it is necessary to perform complicated control so that the door does not react when it is closed and does not respond to a certain area of the door when the door is half opened.

[0004]

As an obstacle detector for a door, a plurality of detectors capable of measuring a distance are installed at appropriate intervals in the vertical direction of a door tip portion. In the case of a double-sliding door, the distance detectors on both sides should be installed with different heights so that they do not interfere with each other.

[0005]

When the door is fully opened or half opened, the door and the door stop or the door and the door are installed in parallel, so that the distance measuring device installed at the door tip outputs the same value. This value indicates the opening of the door. However, when an obstacle such as a passerby exists on the moving line of the door, the distance from the door to the obstacle is measured by a plurality of distance detectors installed. Since an obstacle such as a passerby is almost parallel to the door and not a straight line, the outputs from the respective detectors output different values. Thus, when the output values of the detectors are different, it means that there is an obstacle, and when the output values are the same, there is no obstacle and the opening of the door is shown. Both door opening and obstacle detection are possible with the same detector.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a pulling door embodying the present invention will be described below with reference to the drawings. 1 and 2, the door (1, 15) is a guide rail (2,
16) It is installed above. Distance detector (3, 4,
5, 17, 18, 19) are installed at the door tips (6, 20). This detector has doors (7, 2)
It is used as a feedback input to the drive motors (8, 22) by detecting the distance from 1) and the output value from each detector is set by installing multiple. If indicates the same value, it means that there is no obstacle between the door and the door stop. Further, when the output values are different, it means that there is an obstacle, and it is possible to perform control to move the door to the stop or open position.

It is desirable that the distance measuring device can continuously measure the distance, but it is also possible to use a device which outputs a binary value at a certain distance.

Proximity switch (9, 2) for starting the door opening operation
3) detects the presence of a passerby by approaching the passerby's hand or a part of the body. Motor (8,2)
2), all signal inputs and a control device (10, 24) for controlling the motor by the input, a transmission mechanism (11, 25) for receiving the driving force from the motor and transmitting the force, and a door roller (12) for directly driving the door. , 26). A power cord (13, 27) for supplying power to an electric device incorporated in the door, and a plug (14, 28). As described above, one door (or two doors in the case of double-opening) and the rail constitute most of the necessary functions of the automatic door.

An example of a distance detector using the principle of triangulation will be shown as a position and obstacle detector. Light from an LED (light emitting diode) (29) is projected in a target direction by a lens 1 (30). The image of the light projected on the object by the lens 2 (31) is formed on the light receiving photoelectric converter (32). At this time, the imaged position changes depending on the distance from the projector to the object. The distance is measured by detecting this change. The light receiving photoelectric converter is an element capable of outputting the position of the point of light hitting the light receiving portion (for example,
Hamamatsu Photonics PSD) is used.

[0009]

The obstacle detection and the door opening detection can be configured by the same device. In addition, obstacle detection can detect obstacles existing between doors or between doors regardless of the opening degree of the doors. Further, complicated control considering the door opening is not necessary.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a self-supporting automatic door.

FIG. 2 is a configuration diagram of a hanging automatic door.

FIG. 3 is a diagram showing the principle of a distance measuring device used as an obstacle detector.

[Explanation of Codes] 1, 15 Doors 2, 16 Guide rails for doors 3, 4, 5, 17, 18, 19 Distance detectors 6, 20 Door end parts 7, 21 Per unit 8, 22 Drive motors 9, 23 Door opening start proximity switch 10, 24 Control device 11, 25 Driving force transmission mechanism 12, 26 Door roller 13, 27 Power cord 14, 28 Plug 15, 29 LED (light emitting diode) 16, 30 Lens 1 17, 31 Lens 2 18 , 32 Photoelectric converter for receiving light 33, 34 DUT

Claims (1)

[Claims] 1. In an automatic door device, a plurality of detectors capable of measuring a distance are installed at appropriate intervals in the vertical direction of the door tip, so that in the case of single pulling, both the door and the door stop are connected. In the case of pulling, an obstacle detection device that detects the presence of an obstacle between the doors and the opening of the door.