JPH0342230Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field This invention relates to a sensor device for opening and closing an automatic door.

(b) Prior Art An example of a conventionally known sensor device for automatic doors is shown in FIG. Reference numeral 1 denotes a proximity sensor, which includes a light projecting section that irradiates a light projecting beam 1a in front of the door D, and a light receiving zone 1b that is installed near the projecting section and in almost the same space as the projecting beam 1a. When the projected beam 1a is reflected by something approaching in front of the door D, the amount of light detected by the light receiving section changes. Outputs a signal to open D. The reason why the light beam 1a is directed in front of the door D is because the timing when the door D is opened and the object approaching the door D is directed in front of the door D.
This is to match the timing of reaching . The reason why the change is detected is to avoid continuously outputting a signal to open the door D when something stops in front of the door D.

In principle, the proximity sensor 1 outputs a signal to close the door D after a predetermined period of time after outputting the signal to open the door D, but the light beam 1a is directed in front of the door D. Since it is configured to detect changes in the door D, it is not possible to detect that an object has stopped in the immediate vicinity of door D.
There is a danger that Door D will be closed even though it is there.

In order to prevent this danger, a light emitter 2a and a light receiver 2b are mounted on the left and right side walls of the door D, facing each other with the door D in between, so that the light from the light emitter 2a reaches the light receiver 2b. When the light does not arrive, door D is closed, but when the light does not reach door D, it is assumed that something is present at door D, and door D is not closed. That is, the light projector 2a and the light receiver 2b constitute a presence sensor that detects the presence of an object. The reason why the light projector 2a and the light receiver 2b are attached to the left and right side walls of the door D is because in the case of the facing type, it is necessary to cause the light beam I to cross the door D.

However, in the conventional device described above, although the proximity sensor 1 is normally attached to the wall above the door D, the projector 2a and the receiver 2b are installed separately and facing each other on the left and right walls of the door D. In addition to the inconvenience of having to install it, which requires time and effort, it also does not look good.

(c) Purpose The purpose of this invention is to provide a sensor device for automatic doors that is easy to install and has a good appearance.

(d) Configuration The automatic door sensor device of this invention includes a proximity detector that detects objects approaching in front of the door, and a light receiving zone that is attached to the ceiling or wall above the door and set close to the door. a light receiver, and a light emitter that is attached to the ceiling or wall near the light receiver and is set to emit a light beam so as to intersect the light receiving zone in the space immediately adjacent to the door and not to illuminate the floor surface included in the light receiving zone. A presence sensor detects that something is present near the door when a light receiver detects the reflected light of the projected beam, and the proximity sensor opens the door when it detects something approaching the door. and a controller that outputs a control signal to the automatic door opening/closing mechanism to enable the door to close when a predetermined period of time has elapsed since the opening operation and the presence sensor does not detect anything in the vicinity of the door. It is equipped with and configured.

(E) Embodiment Reference numeral 10 shown in FIG. 2 is an embodiment of the automatic door sensor device of this invention, which is attached to the wall above the door D.

As shown in FIG. 3, this automatic door sensor device 10 includes a proximity sensor 21 and a presence sensor 22.
and a built-in controller 23.

The approach sensor 21 has basically the same configuration as a conventionally known approach sensor, and the light beams 11a, 12a, 13a are emitted from the light projector to the front of the door D, and the light beams 11a, 12a, 13
The light receiving zone 11b of the light receiving part is located in almost the same space as a.
12b and 13b are set. When something approaching the door D enters the projected light beams 11a, 12a, 13a, the amount of reflected light changes, and the approach sensor 21 detects this change.

On the other hand, the presence sensor 22 includes a light emitter 17 and a light receiver 18, as shown in FIG. The projection beam 14 is set so as not to irradiate the floor surface 15a included in the light receiving zone 15. Therefore, normally no reflected light is incident on the light receiver 18, but when something enters the intersecting space 16 between the projection beam 14 and the light receiving zone 15, the reflected light will be incident on the light receiver 18. Presence sensor 22
is used to detect the presence or absence of this reflected light.

The controller 23 outputs a control signal for opening the door D to the opening/closing mechanism M of the door D when there is a change in the amount of light at the proximity sensor 21 . Furthermore, when a predetermined period of time has elapsed and the presence sensor 22 does not detect reflected light, a control signal for closing the door D is output. If the presence sensor 22 detects the reflected light, the door D is kept open until it is no longer detected, and a control signal is output to close the door D only when the presence sensor 22 is no longer detected.

Now, as a result of the above, when a person approaches door D, door D is automatically opened.

If a person remains standing in front of door D or passes through door D, door D will open after a predetermined time.
will be closed automatically.

However, when the person remains near door D, door D remains open.
Door D is automatically closed when the user leaves the nearby position.

Other examples include those in which the proximity sensor is of a radio wave type, a hot wire type, or an ultrasonic type.

(e) Effects According to the automatic door sensor device of this invention,
It senses when someone is near the door and delays the door closing operation, so there is no danger of someone getting caught in the door, making it safer.

Furthermore, since it is not necessary to arrange a light emitter or a light receiver on the left and right sides of the door, installation is easy, and the appearance is also clean and has the effect of giving a good impression to people.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of a conventional photoelectric sensor device for automatic doors, Fig. 2 is an explanatory diagram of the installation of an embodiment of the automatic door sensor device of this invention, and Fig. 3 is
FIG. 4 is an explanatory diagram of the presence sensor of the apparatus shown in FIG. 2. 10... Automatic door sensor device, 11a, 1
2a, 13a...projection beam, 11b, 12b,
13b...Light receiving zone, 14...Emission beam, 1
5...Light receiving zone, 16...Cross space, 17...
Emitter, 18... Light receiver, 21... Proximity detector,
22... Presence sensor, 23... Controller, D... Door, M... Door opening/closing mechanism.

Claims (1)

[Scope of utility model registration request] A proximity sensor that detects objects approaching in front of the door, a light receiver that is installed on the ceiling or wall above the door and has a light reception zone set close to the door, and a light receiver that is installed on the ceiling or wall near the light receiver. A light emitter is attached to the light receiving zone and the light beam is set to intersect with the light receiving zone in the space immediately adjacent to the door, and the light beam is set so as not to irradiate the floor surface included in the light receiving zone. a presence sensor that senses the presence of something in the immediate vicinity; and when the approach sensor detects something approaching the door, the door is opened, and when a predetermined period of time has elapsed since the opening operation, the presence sensor 1. A sensor device for an automatic door, comprising: a controller that outputs a control signal to an automatic door opening/closing mechanism to enable the door to close when the door does not sense the presence of something in the immediate vicinity of the door.