JPS62147390A - Detector for automatic door - Google Patents

Abstract

PURPOSE:To enable both sides of a door to be detected by one sensor by providing a door frame above the door with the sensor for detecting both the outside and inside of the door. CONSTITUTION:A sensor 1 composed of a pyroelectric element, heat ray sensor and the like is provided in a door frame 3 above a door 2. Further, a mirror 4 which substantially V-shaped section is disposed above the sensor 1 and mirrors 5a and 5b for reflecting heat rays to the mirror 4 are symmetrically arranged on both sides of the mirror 4. The mirror 5a detects, for example, a detecting area A outside the door 2 and the mirror 5b detects a detecting area B inside the door 2. The heat rays detected in the detecting area A or B are reflected to the mirror 4 by the mirror 5a or 5b, respectively, and reflected to the sensor 1 by the mirror 4 where by the sensor 1 detects a person and a door opening and closing mechanism is driven by the output signal generated by the change in the signals of the sensor 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an automatic door detector using a pyroelectric element as a sensor.

[Background Art 1] Fig. 4 and Fig. 5 are diagrams showing the arrangement and configuration of conventional sensors for detecting the entrance and exit of people, and the sensors 1a and 1 are
b were arranged on the door frame 3 on the exit and entrance sides of the door 2, respectively. For example, as shown in FIG. 5, in detection area A, sensor 1a is used for detection, and in detection area B, sensor 1b is used for detection, and both sensors 1 at
The output of 1b is OR-connected, and the OR output drives a well-known door opening/closing mechanism to open/close the door.

In the case of such a conventional example, since two sensors 1 at 1 b are used on both sides of the door frame 3 to detect a person, there is a problem in that it becomes expensive.

[Object of the invention] The present invention has been provided in view of the above points, and includes:
The object of the present invention is to provide a low-cost automatic door detector that detects both sides of the door using a sensor mounted on the base.

[Disclosure of the Invention 1 (Configuration) The present invention provides an automatic door detector that detects the entrance and exit of a person using a sensor and automatically opens and closes the door based on the output of the sensor. This system is characterized by a single sensor that detects both of these being placed in the door frame above the door.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, a sensor 1 is installed in a door frame 3 above a door 2. In FIGS. Also, sensor 1
It may also be installed by pushing it onto the top of the door frame 3. The sensor 1 is composed of a pyroelectric element, a heat ray sensor, and the like. Above the sensor 1, a mirror 4 having a substantially ■-shaped cross section is arranged.
Mirrors 5a and 5b for reflecting light are arranged symmetrically.

For example, a detection area A outside the door 2 is detected by the mirror 5a, and a detection area B inside the door 2 is detected by the mirror 51). The heat rays detected in detection area 8 or B are reflected by mirror 5a or mirror 5)) to mirror 4, and reflected from mirror 4 to sensor 1, sensor 1 detects a person, and the change in the signal causes an output signal. It drives a door opening/closing mechanism known as In addition, the mirror 5a.

By using 5b as a polygon mirror, the detection areas A and B can be divided into many beams to match the width of the door 2. Since the only part protruding from the door frame 3 is the opening of the optical system, it is not noticeable. Furthermore, these protruding portions can be made smaller, resulting in better matching in design.

In addition, by placing the sensor 1 inside the door frame 3,
Even door frames 3 having different widths can be installed.

In FIG. 3, mirrors 5a and 5b are plane mirrors, and mirror 4 is a concave mirror, and since there is parallel light between mirror 4 and mirrors 5a and 5b,
Even if the length is changed, the detection area does not change.

[Effect of the Invention 1] As described above, the present invention provides an automatic door detector that detects the entrance and exit of a person using a sensor and automatically opens and closes the door based on the output of the sensor. A single sensor that detects both is placed in the door frame above the door, so one sensor can detect both sides of the door, resulting in a low cost. .

[Brief explanation of drawings]

FIG. 1 is a layout configuration diagram of an embodiment of the present invention, FIG. 2 is a perspective view of the automatic door same as above, and FIG. 3 is a layout configuration diagram of another embodiment.
FIG. 4 is a perspective view of a conventional automatic door, and FIG. 5 is a plan view of the same. 1 is a sensor, 2 is a door, and 3 is a door frame. Agent Patent Attorney Ishi 1) Chief Figure 7 4

Claims (1)

[Claims] (1) In an automatic door detector that detects people entering and exiting using a sensor and automatically opens and closes the door based on the sensor output, one sensor detects both the outside and inside of the door. A detector for an automatic door, characterized in that the detector is arranged in a door frame above the door.