JPH069181A - Safety device of elevator car door - Google Patents

Abstract

PURPOSE:To provide a safety device of an elevator car door which has a safety higher than a conventional device, by detecting a foreign matter held along the whole area in the up and down direction of the closing end of the door. CONSTITUTION:This safety device is composed by providing photoelectric devices 9 and 11 for detecting a foreign matter 6 passing in the up and down direction through a gap G provided between a car threshold 3 and a landing threshold 5, near the closing end of a car door 2.

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 car door, and more particularly to a safety device for an elevator car door suitable for detecting a foreign object caught at the closed end of the door.

[0002]

2. Description of the Related Art As a conventional technique, the actual exploitation 64-12
As described in Japanese Patent No. 069, provided at the tip of the door,
A car door with a safety shoe that reverses the door when a force in the opening direction is applied to the door that is moving in the closing direction, and an elevator car door that includes a front pillar that forms the closed end of the car when the door is closed. In the safety device, a pressure-sensitive foreign matter detection device is provided between the lower end of the door below the safety shoe and the lower end of the front pillar to detect the foreign matter caught at the closed end of the door.

[0003]

By the way, when a case where the elevator is started in a state where a foreign object such as a string is caught at the closed end of the door is examined, it becomes the lower end when the car is in the ascending operation and is the lower end when the car is in the descending operation. It may be at the top. This means that depending on the type of safety shoe attached to the tip of the door, it may become inoperable when the door reaches the closed end, so the position where foreign matter falls is not necessarily the bottom edge of the door. To do.

The above-mentioned prior art does not adequately consider this point, and since dust easily accumulates on the lower end of the closed end of the door, there is a problem in that it is mistaken for foreign matter.

An object of the present invention is to provide a safety device for an elevator car door, which is capable of detecting foreign matter over the entire area above and below the closed end of the door.

[0006]

In order to achieve the above object, the present invention has a predetermined gap between a car sill that guides a car door and a hall sill that guides a landing door when the car is landing on the car. In a safety device for an elevator car door, a photoelectric device for detecting a foreign object passing vertically through the gap is provided near the closed end of the car door.

[0007]

According to the present invention, a photoelectric device for detecting foreign matter passing vertically through a gap formed by a car sill and a landing sill is provided in the vicinity of the closed end of the car door, and the foreign matter trapped all over the door closed end is removed. Since it is configured to detect, it is possible to provide a safety device for an elevator car door, which is safer than before.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. Figure 1 is a horizontal cross section of the elevator hoistway,
2 is a plan view of an essential part of FIG. 1, and FIG. 3 is a side view of FIG.

In the figure, 1 is a car that moves up and down the hoistway 13, 2 is a door of the car 1, 3 is a sill that guides the car door 2, 4 is a landing door that opens and closes in synchronization with the car door 2, and 5 Is a landing sill that guides the landing door 4, G is a predetermined gap provided between the car sill 3 and the landing sill 5, 6 is a string-made foreign object made by a rope jump at the closed end of the door, and 7 is a car door 2 A safety shoe that is provided at the tip and turns over the door when a force in the opening direction is applied to the door while the door is being opened or closed.
Is attached to the upper bracket 8, 9 is a light emitting portion of the photoelectric device supported by the upper bracket 8, 10 is a lower bracket fixed to the car 1, 11 is a light receiving portion of the photoelectric device supported by the lower bracket 10, and 12 is The beam.

In the above-described structure, if the foreign matter 6 is caught at the door end as shown in FIG. 1, the foreign matter 6 is at the door end and on the gap G before the elevator is started, or Whenever the elevator is started up or down, it always enters the vertical projection space of the gap G and the beam 1
It will be detected because it will block 2 and if it is not activated, the door will be inverted if it is not activated, and if it is activated, the elevator will be emergency stopped or the floor will be opened to the original floor for safety. To secure.

[0011]

According to the present invention, a photoelectric device for detecting a foreign object passing vertically through a gap formed by a car sill and a landing sill is provided in the vicinity of the closed end of the car door, and is sandwiched over the entire area above and below the closed end of the door. Since it is configured to detect foreign matter, it is possible to provide a safety device for an elevator car door, which is safer than ever.

[Brief description of drawings]

FIG. 1 is a plan sectional view of an elevator hoistway showing an embodiment of the present invention.

FIG. 2 is a plan view of an essential part of FIG.

FIG. 3 is a side view of FIG.

[Explanation of symbols]

 1 cage 3 cage sill 5 landing sill 6 foreign matter 8 upper bracket 9 light emitting part of photoelectric device 10 lower bracket 11 light receiving part of photoelectric device 12 beam of photoelectric device

Claims (1)

[Claims] 1. A safety device for an elevator car door having a predetermined gap between a car sill that guides a car door and a landing sill that guides a hall door when the car is landed,
A safety device for an elevator car door, comprising a photoelectric device for detecting a foreign object passing vertically through the gap near the closed end of the car door.