JPH11335043A - Safety device for elevator door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make passengers easily find a door-closing preventive condition due to light shading, by arranging a visible ray emitting body for emitting a visible ray in the vicinity of an unvisible ray, in the vicinity of a door in a safety device for preventing door-opening when an unvisible ray receiving body does not detect light receiving. SOLUTION: A multibeam door sensor, composed of an unvisible ray emitting body 4a: composed of plural luminous elements 41a for emitting an unvisible ray 6, and an unvisible ray receiving body 5b: composed of plural luminous elements 51b for receiving the unvisible ray 6 opposite to the emitting body 4a, is installed in the closing directional end parts of car doors 1a and 1b to prevent door-closing when the unvisible ray 6 is shaded. At that time, a visible ray emitting body 7 composed of luminous elements 7a for emitting plural visible rays 8 is attached. When passengers shade the unvisible ray 6, the visible rays 8 are also shaded concurrently, to make the passengers find the preventive condition of door-closing due to light shading, thereby preventing the operational efficiency lowering of an elevator.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for an elevator door for preventing a door from being damaged during opening and closing of a passenger.

[0002]

2. Description of the Related Art Conventionally, an elevator includes an invisible light emitter that emits invisible light, for example, laser light or modulated light, near one of a car door and a landing door, and the invisible light emitter. A door safety device is provided having a non-visible light receiver that receives the non-visible light and is arranged to face the door. This prevented the passengers from being damaged by being caught in the car.

An example of this kind of safety device is shown in Japanese Utility Model Laid-Open Publication No.
The disclosure is found in JP-A-3-49868.

In order to improve the detection accuracy of passengers, there has been proposed a photodetector and a photodetector provided with a plurality of photodetectors, an example of which is disclosed in JP-A-8-208162.

[0005]

However, in the above-mentioned prior art, since the door is blocked by blocking the invisible light, if the passenger is near the door and unintentionally shields the light, the door is not closed. There is a disadvantage that the operating efficiency of the elevator is reduced.

[0006] Further, this inconvenience is particularly observed when there are a plurality of invisible light rays.

The present invention has been made in view of the above-mentioned inconveniences, and an object of the present invention is to provide an elevator door safety device which can easily make passengers aware of a door blocking state due to light blocking and which can achieve an improvement in operating efficiency. To offer.

[0008]

In order to achieve the above object, the present invention provides a luminous body which is provided near one of a car door and a landing door and emits invisible light, and a luminous body which emits invisible light. An elevator door safety device that is disposed to face and has an invisible light receiver that receives the invisible light, and that prevents the door from being opened when light reception is not detected by the invisible light receiver. A visible light emitter that emits visible light is disposed near the door so as to be located near the invisible light.

In the present invention, since the visible light emitter that emits visible light is provided so as to be positioned near the invisible light, the passenger can be alerted by blocking the visible light, and the passenger can be shielded from light. The operation efficiency of the elevator can be improved because it can be moved to avoid it.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings, taking a multi-beam door sensor in which a plurality of light emitters and light receivers are installed on a car door as an example.

FIG. 1 is a front view of a car door showing an embodiment of an elevator door safety device according to the present invention, and FIG.
It is -A 'sectional drawing.

In the figure, a car door 1a, 1b has door rollers 11a, 11b at its upper part, and door shoes 12a, 12b at its lower part, and a door rail 2 at its upper part.
The lower part is guided by the sill 3 to open and close.

At the ends of the car doors 1a and 1b in the closing direction, an invisible light emitter 4a, which comprises a plurality of light emitting elements 41a and emits an invisible light 6 (indicated by solid lines), is provided.
A multi-beam door sensor is provided which includes an invisible light receiving element 5b, which is arranged to face the invisible light emitting element 4a and receives a plurality of light receiving elements 51b for receiving the invisible light 6.

The multi-beam door sensor is configured to operate when the plurality of invisible light rays 6 are shielded and to prevent the door from being closed.

The visible light emitter 7 has a light emitting element 7a for shielding a plurality of visible lights 8 (indicated by solid lines).

In the present invention, since the visible light emitter 7 is provided in this manner, if the passenger blocks the invisible light 6 of the multi-beam door sensor, the passenger simultaneously blocks the visible light 8, and the passenger blocks the visible light 8. In order to avoid this, it is possible to prevent a decrease in elevator operation due to unconsciousness.

Although a plurality of light emitting elements 7a are provided here, a single light emitting element may be provided.

Further, if the visible light emitter 7 is arranged so that the visible light 8 and the invisible light 6 are parallel to each other, the simultaneous light shielding can be surely realized, and the above effect can be further improved.

[0019]

According to the present invention, since the door safety device is configured as described above, it is possible to notify the passenger that the door is in the closed state by light shielding and to improve the driving efficiency.

[Brief description of the drawings]

FIG. 1 is a front view of a car door showing an embodiment of a safety device for an elevator door of the present invention.

FIG. 2 is a sectional view taken along line AA ′ of FIG. 1;

[Description of Signs] 1a, 1b Car door 4a Invisible light emitter 5b Invisible light receiver 6 Invisible light 7 Visible light emitter 8 Visible light

Claims (2)

[Claims] 1. A luminous body which is provided near one of a car door and a landing door and emits invisible light, and a luminous body which is arranged to face the invisible light luminous body and receives the invisible light. A safety device for an elevator door that has a visible light receiver and prevents the door from being opened when light reception is not detected by the invisible light receiver, wherein the visible light is positioned near the invisible light. A safety device for an elevator door, wherein a visible light emitter that emits light is disposed near the door. 2. The safety device for an elevator door according to claim 1, wherein the visible light emitter is arranged to emit visible light substantially parallel to the invisible light.