JPH05246667A - Safety device for elevator door - Google Patents

Abstract

PURPOSE:To provide an elevator with a safety device which prevents the malfunction and surely detects the nipping of a string, etc. CONSTITUTION:A tape switch 1 installed at the edge of the whole length of the closed edge part of a cage door and a microswitch installed at the lowermost part of the closed edge part are connected with each elevator control stop circuit, and the elevator is brought into stop when the rubber elastic body 2 of the tapp switch 1 or the detection piece 5 of the microswitch senses a string.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improvements in elevator door safety devices.

[0002]

2. Description of the Related Art Generally, an elevator door safety device is hung by a pair of links so as to move forward and backward to the front end of the door, as shown in, for example, Japanese Utility Model Laid-Open No. 550023/1985. When moving from
The operating piece is provided so as to rotate upward, and the door is provided with a switch for stopping or reversing the closing operation of the door by the backward movement of the operating piece during the door closing operation or when the door is fully opened.

However, due to the structure, it is not possible to detect that a soft and thin object is sandwiched, and there is a method disclosed in Japanese Utility Model Application Laid-Open No. 62-71175 that improves this point.

[0004]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
According to Japanese Patent No. 1175, a tape switch is provided at one end of a door to detect pinching of a string or the like. However, there is a drawback that the door malfunctions when the door is slightly strongly closed due to a door misadjustment or the like. is there.

It is an object of the present invention to provide a safety device for an elevator door which prevents malfunction and can reliably detect pinching of a string or the like.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to provide a safety device for an elevator door provided on a door which is suspended by a hanger roller and which opens and closes along a door rail, and is arranged at a closed end angle of the door. Further, it is achieved by providing the tape switch at a position where it does not come into contact with other parts when the door is fully closed.

[0007]

According to the above construction, for example, even if the string carried by the passenger who got into the car is caught in the elevator door, the tape moves due to the tension of the string when the passenger moves or the elevator car moves a little. The switch works. Further, since the tape switch is provided at the corner of the closed end of the door, it does not operate even if the door is closed somewhat strongly.

[0008]

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

FIG. 1 is a plan view of a single-open car door showing an embodiment of the present invention, and FIG. 2 is a plan view of a double-open car door.
FIG. 3 is a detailed plan view showing the installation of the thin cord detecting device installed at the closed end of the car door of FIG. 1 or 2, and FIG. 4 is a front view of FIG.

The tape switch 1 installed at the corner of the closed end of the door shown in FIG. 3 is embedded in the entire length of the door, and contains two oppositely facing conductors 3 wrapped in a rubber elastic body 2.
It is connected to an elevator stop circuit and the fact that a thin string or the like is caught at the closed end of the door is detected by the pressure applied to the rubber elastic body 2 to stop the elevator. The microswitch 4 installed at the lower end of the door shown in FIG. 4 has its detection piece 5 extended to the threshold groove 7, and the detection piece 5 is installed so as to project at least from the closed end of the door. Similarly, the elevator is stopped by detecting that a connecting string or the like is caught in the elevator stop circuit.

Next, the operation of detecting the thin string or the like at any position will be described with additional features.

When an elevator user pulls into a car while holding a thin cord or the like, the vertical position where the thin cord or the like is sandwiched is not specified, so that the tape switch 1 is installed over the entire door height. is doing. Further, even when a thin string or the like is caught between the sill 6 and the sill 6 which is detached from the lower end of the door, the detection piece 5 of the microswitch 4 is located at least at the closed end of the door, so that it is possible to detect even a very thin string. Further, since the detection piece 5 extends in the threshold groove 7, it has a feature that foreign matter in the threshold groove 7 can be detected. Further, when the thin string or the like is sandwiched by itself (not held by the user), it is on the threshold 6, and the micro switch 4 detects this. Since the tape switch 1 is installed at the corner of the closed end of the door, even if the normal closed end of the door where the thin string or the like is not caught is not properly adjusted and is strong, the operation can be performed without malfunction.

As described above, according to this embodiment, since the detecting portions are provided at the corners of the closed end of the door and the lower end of the door, it is possible to reliably detect the pinching of the thin cord.

[0014]

As described above, according to the present invention, a tape switch, which is a safety device, is provided at the corner of the closed end of the door to prevent malfunction when the door is closed a little due to improper door adjustment. The pinching of the thin cord, which is the main purpose, can be reliably detected. In addition, the micro switch provided at the lower end of the door can detect a string that has entered a slight gap on the sill and can also detect a foreign substance in the sill groove.

[Brief description of drawings]

FIG. 1 is a plan view of a single-sided car door incorporating the safety device of the present invention.

FIG. 2 is a plan view of a double-door car door incorporating the safety device of the present invention.

FIG. 3 is a detailed plan view of a car door closed end portion in which the safety device of the present invention is incorporated.

FIG. 4 is a front view around a sill of a car door closed end (lower end) in which the safety device of the present invention is incorporated.

[Explanation of symbols]

 1 Tape switch 2 Rubber elastic body 3 Conductor 4 Micro switch 5 Detection piece 6 Sill 7 Sill groove

Claims (1)

[Claims] 1. A safety device for an elevator door, which is provided on a door that is suspended by a hanger roller and that opens and closes along a door rail, is arranged at a closed end angle of the door, and when the door is fully closed, A safety device for elevator doors, characterized in that a tape switch is provided at a position where it does not come into contact with other parts.