JP2505609B2 - Safety device for elevator doors - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a safety device for an elevator door, which detects an elevator passenger in a non-contact manner and inverts and opens the elevator door which is being closed.

[Conventional technology]

FIG. 5 is a general configuration diagram of an infrared detector (8) used for detecting a human body. In the figure, (15) is an optical system lens for condensing infrared rays within the human body detection range, and the condensed infrared rays are converted into an electric signal according to the infrared ray amount by a thermoelectric conversion element (16). It is amplified to a constant level by the operational amplifier (17) and input to the comparator (18). The comparator (18) outputs a door opening command from the output terminal (19) when the input signal level exceeds a certain level.

FIGS. 6 (a) and 6 (b) are configuration diagrams of a conventional elevator door safety device configured by installing the infrared detector (8) having the above-described configuration in an elevator door having a single-opening door.

In the figure, (1) is a car room, (2) is a car door,
(3) is a landing door, (4) is a hanger plate on which rollers (4a) for guiding the car door (2) along the rail (6) are installed, and (5) detects a door stop of passengers, A safety shoe that outputs a door inversion signal, (8) an infrared detector attached to the rail (6) for non-contact detection of elevator passengers located in the detection range (9), and (10) a basket sill Line, (11) is the landing threshold line, and (12) is the landing frame.

The operation of this device is as follows: When the elevator door passengers enter the human body detection range (9) when the car door (2) and the landing door (3) are closed, the detection range ( The infrared energy in 9) changes. This change in infrared energy is detected by the infrared detector (8) installed on the rail (6) above the passengers, and a door opening command for opening the reversing door while the door is closed is sent to the elevator door control panel (not shown). Output.

In addition, as shown in FIGS. 7 (a) and 7 (b), when the elevator doors are double doors, the car doors (2) and (2) and the landing doors (3) and (3) are fully closed. The infrared detector (8) having the above-described configuration is installed on the rail (6) at the target position, and the detection range (9) is directly below the infrared detector (8). As a result, for example, when both car doors (2), (2) are fully closed and a human body is detected within the detection range (9), both car doors (2),
(2) is controlled by the elevator control panel to open the reversing door.

[Problems to be Solved by the Invention]

A conventional elevator safety device is shown in FIG.
Since infrared detectors are installed at the positions shown in (b) and FIGS. 7 (a) and (b) to set the detection range, it is impossible to detect the human body near the fully open door. When is expanded, the closed door is detected, so the detection range cannot be expanded. Therefore, some passengers could not be detected on the doorway of the car and the landing door. In addition, since the detection of the human body is detected by the change in infrared energy within the detection range, even if it is within the detection range, there is no movement of the human body for passengers who are stationary near the car door. There is a problem that the infrared energy change is not detected, and therefore the detection of passengers is not possible, and the safety shoe does not turn the door open until it finally touches the body.

The present invention has been made to solve the above problems, and an object of the present invention is to obtain a safety device for an elevator door capable of detecting passengers over the entire doorway of a car door and a landing door. .

[Means for solving the problem]

The safety device for an elevator door according to the present invention installs an infrared detector that detects infrared rays emitted by a human body on a member that moves with the movement of the elevator door, and the radiated infrared ray detection direction is along the elevator door tip. In the vertical direction, outputs a command to open the reversing door to the elevator door that is in the door closing operation according to the radiant infrared detection result, and if the elevator door is a double door, install it on each member that moves with the movement of the elevator door. The infrared detectors are characterized in that the mounting positions of the infrared detectors are displaced from each other, and the radiation infrared detection direction of at least one of the infrared detectors is effective in the vicinity of the fully closed elevator doors.

[Action]

According to this invention, the mounting position of the infrared detector is the tip of the hanger plate that moves together with the movement of the elevator door, and the infrared energy detection direction is the vertical direction along the elevator door. The entire area of the doorway is continuously detected and the detection of passengers is eliminated.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1 (a) and 1 (b) are configuration diagrams when the safety device for an elevator door according to the present embodiment is installed in an elevator door having a single-opening door. In the figure, the same reference numerals as in FIGS. 6 (a) and (b)
The same or corresponding parts are shown and detailed description thereof is omitted.
In the figure, (7) is a mounting metal fitting extended to the hanger plate (4), and the tip of the mounting metal fitting (7) is
An infrared detector (8) having the structure shown in FIG. 5 is attached. This infrared detection direction is the vertical direction along the tip of the car door (2), and the detection range (9) continuously moves from the fully open position to the fully closed position on the doorway as the car door (2) moves. Change.

FIGS. 2 (a) and 2 (b) are configuration diagrams when the device of this embodiment is applied to an elevator door having a double door. First in the figure
The same reference numerals as those in FIGS. (A) and (b) indicate the same or corresponding portions. In this embodiment, the metal fittings (7) are attached to the hanger plates (4) and (4) of the car doors (2) and (2), respectively.
Infrared detectors (8a) and (8b) are attached via a) and (7b). As the operation of this embodiment, the door is in a state of being closed from the vicinity of full opening, and when the door is moved in the door closing direction, the detection ranges (9a) and (9b) are also moved in the door closing direction along with the movement. However, the infrared energy within the detection range hardly changes. If there are passengers as shown in the figure while the door is closed, the passengers will enter the detection range (9a) or (9b), so the infrared energy within the detection range will change significantly due to the infrared rays emitted by the human body. The infrared detector (8a) or (8b) outputs a corresponding signal, and a door opening command is output to a door opening / closing control means (not shown) to open the door in reverse. Even if the passengers are stationary near the threshold, the infrared energy within the detection range changes because the door closes (that is, the detection range moves).
Similar to the above, the reversing door is opened.

 Further, the operation of the above-mentioned single-opening door is similar to that of the double-opening door.

If infrared detectors are installed on the hanger plates of the double doors, the infrared detectors may interfere with each other when the doors are fully closed.
As shown in (3), the infrared detectors (8a) and (8b) may be vertically displaced from each other so that only the lower infrared detector (8a) is effective for human body detection when the door is substantially fully closed.

Alternatively, as shown in FIGS. 4 (a) and 4 (b), the infrared detectors (8a),
The human body detection by the infrared detectors (8a) and (8b) may be effective even when (8b) is shifted back and forth and the door is substantially fully closed.

〔The invention's effect〕

As described above, according to the present invention, an infrared detector that detects infrared rays emitted by the human body is installed on a member that moves with the movement of the elevator door, and the radiated infrared ray detection direction is along the elevator door tip. In the vertical direction,
The human body detection range is continuously changed from the fully open position to the fully closed position by outputting a command to open the inverted elevator door during closing operation according to the radiant infrared detection result. It is possible to detect passengers in the entire doorway without having to cover a wide area and prevent detection omissions. Therefore, there is an effect that an extremely reliable elevator door safety device can be obtained.

[Brief description of drawings]

1 (a) and 1 (b) are a front view and a top view of a single-opening door showing a mounting state and a detection range of a safety device for an elevator door according to an embodiment of the present invention, and FIGS. 2 (a) and 2 (b). ) Is a front view and a top view of a double door showing a mounting state and a detection range of a safety device for an elevator door according to another embodiment of the present invention, FIGS. 3 (a), (b), 4 (a), (B) is a front view and a top view showing a mounting state and a detection range in the vicinity of a fully closed door of a safety device for an elevator door according to an embodiment of the present invention, Fig. 5 is a configuration diagram of an infrared detector, and Fig. 6 (A) and (b) are a top view and a front view of a single-opening door showing a mounting state and a detection range of a safety device for a conventional elevator door, and FIGS. 7 (a) and (b) are safety for the conventional elevator door. It is the front view and top view of a double door which shows the mounting state and detection range of an apparatus. In the figure, (2) is a car door, (3) is a landing door, (4) is a hanger plate, (7) is a mounting bracket, (8) is an infrared detector, and (9) is a detection range. In the drawings, the same reference numerals indicate the same or corresponding parts.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masahiko Fukuda Inventor Masahiko Fukuda 2-14-40 Ofuna, Kamakura-shi, Kanagawa Sanryo Electric Co., Ltd. Living Systems Research Center (56) Reference JP-A-2-43195 (JP, A)

Claims (2)

(57) [Claims] 1. An infrared detector for detecting infrared rays emitted by a human body is installed on a member that moves with the movement of an elevator door, and the emitted infrared ray detection direction is a vertical direction along the tip of the elevator door. A safety device for an elevator door, which outputs a command for opening the inverted elevator door during a door closing operation according to a detection result. 2. The safety device for an elevator door according to claim 1, wherein when the elevator door is a double door, the infrared detectors installed on members of the respective doors that move together with the movement of the elevator door are mutually A safety device for an elevator door, characterized in that the mounting position is shifted so that at least one of the infrared detectors can detect the emitted infrared ray in the vicinity of the substantially closed position of the elevator door.