JPH11310375A - Door safety device for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent pulling-in before a load is applied to the user's body by controlling opening/closing operation of a sliding door according to operation of a photoelectric device having a detecting area in the vertical direction of an entrance arranged in the door pocket part between vertical frames constituting the entrance and the sliding door. SOLUTION: An entrance of an elevator is composed of a sliding door opening/closing in the lateral direction by an electric motor, the threshold for guiding the sliding door, left/right vertical frames 4 and an upper frame constituting three sides of an entrance. There is a constant interval 6 on an opening/ closing mechanism of the sliding door between the sliding door and the vertical frames 4 to constitute the door pocket part 7. A photoelectric device 8 having a detecting area in the vertical direction of the entrance is arranged in the door pocket part 7 so that the photoelectric device 8 is constituted of the light projecting part 8a, the light receiving part 8b and the optical axis 8c. When cutting off the optical axis 8c possessed by the photoelectric device at sliding door opening time, sliding door opening operation is immediately stopped to be also reversely controlled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an elevator door safety device.

[0002]

2. Description of the Related Art Generally, the entrance of a passenger elevator comprises a sliding door which is electrically opened and closed in the left-right direction, a threshold for guiding the sliding door, left and right vertical frames constituting three sides of the entrance, and an upper upper frame.

Further, a certain gap is required between the sliding door, the vertical frame and the upper frame due to the opening and closing mechanism of the sliding door.

Here, when the sliding door is opened and closed, particularly when the door is opened,
Elevator user's hands are pulled into the gap between the vertical frame and the sliding door, and there are occasional cases that lead to accidents.

[0005] On the other hand, it has been proposed to install a safety device for detecting the pull-in phenomenon and controlling the opening / closing operation of the sliding door.
468 publication.

[0006]

However, in the above safety device, the deformation of the vertical frame or the sliding door which occurs when the elevator user's hand or the like is drawn into the gap between the vertical frame and the sliding door is detected. As a result, the opening and closing operation of the sliding door is controlled. For this reason, it takes a certain period of time from when the user's arm or the like is pulled in to when the opening and closing operation of the sliding door stops or reverses, and the load on the body that is drawn in during that time is large. Had.

[0007] In particular, in the case of an accident in which a child is retracted, an increase in the retracted time immediately results in damage to the body of the infant, and thus improvement is required.

It is an object of the present invention to provide an elevator door safety device that detects a retracted state more quickly and controls the opening and closing operation of a sliding door.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an elevator having a sliding door for electrically opening and closing an entrance, wherein a door pocket portion between the vertical frame constituting the entrance and the sliding door is provided with an entrance. An optoelectronic device having a detection area in a vertical direction is provided, and the opening and closing operation of the sliding door is controlled according to the operation of the optoelectronic device.

[0010]

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

FIG. 2 is an overall view of the entrance of the elevator.

The entrance 1 of the elevator comprises a sliding door 2 which is electrically opened and closed in the left-right direction, a threshold 3 for guiding the sliding door 2, and left and right vertical frames 4 constituting three sides of the entrance 1 and an upper upper frame 5.

FIG. 1 is a side view showing an elevator door safety device according to the present invention.

A fixed gap 6 exists between the sliding door 2 and the vertical frame 4 due to the opening and closing mechanism of the sliding door 2, and forms a door pocket 7. The door pocket 7 is provided with a photoelectric device 8 having a detection area in the vertical direction of the doorway, and the photoelectric device 8 includes a light projecting unit 8a, a light receiving unit 8b, and an optical axis 8c.

If the optical axis 8c of the photoelectric device 8 is interrupted while the sliding door 2 is being opened, the opening operation of the sliding door 2 is immediately stopped, and the reversing control is performed.

FIG. 3 shows a sectional view of FIG.

In the drawing, W indicates an entrance / exit width, and a photoelectric device 8 is provided in a door pocket portion 7 between the sliding door 2 and the vertical frame 4, and a state in which a user's hand 9 is drawn into the gap.

Normally, the elevator user passes through the range of the entrance width W when getting on and off the elevator, so that the optical axis 8c of the photoelectric device 8 is not interrupted. Therefore, the sliding door 2 only performs a normal opening / closing operation, and does not hinder the operation of the elevator.

However, if the user's hand 9 is pulled into the gap 6 of the door pocket 7 together with the operation of the sliding door 2 while the sliding door 2 is being opened for some reason, the optical axis 8c of the photoelectric device 8 Is shut off.

As a result, the photoelectric device 8 operates and the sliding door 2
Immediately stops the door opening operation and is reversed.

This makes it possible to quickly detect the user's hand 9 being pulled into the door pocket 7 and to pull the user's hand 9 back from the door pocket 7 before a physical load is applied. Become.

[0022]

As described above, the elevator door safety device according to the present invention is provided with a photoelectric device having a detection area in the vertical direction of the entrance in the door pocket between the vertical frame and the sliding door constituting the entrance, The opening and closing operation of the sliding door can be controlled in accordance with the operation of the photoelectric device. As a result, it is possible to detect the retraction more quickly and to eliminate the retraction before a physical load is applied to the user.

[Brief description of the drawings]

FIG. 1 is a side view showing an elevator door safety device of the present invention.

FIG. 2 is an overall view of an entrance and exit of an elevator according to an embodiment of the present invention.

FIG. 3 is a sectional view of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Entrance / exit 2 Sliding door 3 Sill 4 Vertical frame 5 Upper frame 6 Gap 7 Door pocket 8 Optical device 8a Projector 8b Receiver 8c Optical axis 9 User's hand

Claims (1)

[Claims] 1. An elevator provided with a sliding door for electrically opening and closing an entrance, wherein a photoelectric device having a detection area in a vertical direction of the entrance is provided in a door pocket portion between a vertical frame and the sliding door constituting the entrance, and the photoelectric device is provided. An opening / closing operation of the sliding door is controlled in accordance with the operation of (1).