JPH05301692A - Safety device for elevator entrance door - Google Patents

Abstract

PURPOSE:To provide an elevator entrance door safety device of high safety capable of detecting foreign material such as even a string like body of small cross section in contact with the floor, thereby eliminating such danger that the foot tip or the like of a passenger is put in between. CONSTITUTION:The lower end 12a of an operating piece disposed movably along the door closing side edge part of an elevator door 1 through parallel link mechanism 3 is fitted slidably with play into the guide groove 11 of a sill, and the retreating direction movement of this operating piece in relation to the elevator door 1 is detected to control the closing action of the elevator door 1.

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, and more particularly to a safety device for an elevator door that can prevent foreign matter from being caught in the elevator door.

[0002]

2. Description of the Related Art A conventional safety device for an elevator door of this type is disclosed in Japanese Utility Model Publication No. 63-41415.
And Japanese Patent Application Laid-Open No. 3-79582. FIG. 3 is a front view showing a conventional safety device for an elevator door as disclosed in the above publication.

In the figure, 1 is an elevator door that opens and closes the entrance and exit of an elevator, 2 is an operating piece arranged in a state of extending along the edge of the elevator door 1, and 3 is an operating piece 2 which can move the operating piece 2 in the backward direction. In the parallel link mechanism mounted on the elevator door 1 in such a state, 3a is a link of the parallel link mechanism 3, 3b is a switch for detecting when the operating piece 2 is retracted, 3c is a forward movement of the operating piece 2 at a predetermined position. The stopper 3d that regulates to 3 is a movable fulcrum of the link 3a. 4 is link 3
It is a rivet in which a is pivotally attached to the operating piece 2. 5 is a sill extending below the entrance of the elevator, 6 is a roller arranged above the elevator door 1, 7 is a rail arranged below the entrance of the elevator and the roller 6 rolls, 8 is a string, etc. Foreign material.

A conventional safety device for an elevator door is constructed as described above, and an operating piece 2 which is moved forward and backward by a pair of parallel link mechanisms 3 at the tip of the elevator door 1.
Is rotatably supported in the upward direction, and the elevator door 1 is provided with a switch 3b for stopping or reversing the closing operation of the elevator door 1 by the operating piece 2 during the door opening operation or when the elevator door 1 is fully opened. Therefore, when a person or the like touches the operating piece 2 during the closing operation of the elevator door 1, the operating piece 2 retracts, and the switch 3b operates to control the closing operation of the elevator door 1.

[0005]

However, in the conventional safety device for an elevator door as described above, the operating piece 2 cannot be provided over the entire height of the elevator door 1 structurally, and the lower end 2a of the operating piece 2 cannot be provided. Between the upper surface 5a of the threshold 5,
Also, there are predetermined gaps between the lower end 1a of the elevator door 1 and the upper surface 5a of the sill 5.

Therefore, when the cord-shaped foreign body 8 having a small cross section such as a cord is in contact with the floor, the operating piece 2 does not move,
This foreign substance 8 could not be detected. Therefore, the elevator door 1 may be closed as it is, and the operation of the elevator may be started while the cord-shaped body is sandwiched at the lowermost portion of the tip of the elevator door 1. The cord-like foreign matter 8 is a cord of an electric vacuum cleaner that is cleaning an elevator hall or the inside of an elevator car, and sometimes a pet chain or the like, which is a problem in terms of safety. Moreover, the foot of the passenger may be caught in the gap between the lower end 2a of the operating piece 2 and the floor.

Therefore, the present invention can detect even a foreign substance 8 such as a string-like object that is in contact with the floor, and there is no danger of the passengers' toes being caught, and the safety device for an elevator door is highly safe. Is to be provided.

[0008]

A safety device for an elevator door according to the present invention includes an elevator door that opens and closes an elevator door and a parallel link mechanism along the edge of the elevator door on the door closing side. A movable piece arranged in a movable state, a sill having a guide groove in which a lower end of the movable piece is loosely fitted in a slidable state, a movement of the movable piece in the backward direction is detected, and an elevator door And a safety means for controlling the closing operation.

[0009]

In the elevator door safety device of the present invention, the lower end of the operating piece movably disposed along the edge of the elevator door on the door closing side via the parallel link mechanism guides the sill. It is fitted in the groove in a slidable state and detects the backward movement of the operating piece to control the closing operation of the elevator door.Therefore, there is no gap between the lower end of the operating piece and the upper surface of the sill. Even if a foreign object such as a string-shaped object with a small cross section or the foot of a passenger is located at the tip, the operating piece moves in the backward direction with respect to the elevator door and the closing operation of the elevator door is controlled. Foreign bodies such as the body and the feet of passengers are not caught between the lower edge of the elevator door and the sill.

[0010]

EXAMPLES Examples of the present invention will be described below.
FIG. 1 is a front view showing a safety device for an elevator door according to an embodiment of the present invention, and FIG. 2 is an enlarged side view of an essential part showing the safety device for an elevator door of FIG. In the figure,
The same reference numerals and symbols as those of the above-mentioned conventional example indicate the same or corresponding components as those of the above-mentioned conventional example.

In the figure, 11 is a guide groove provided in the sill 5, 12 is an operating piece arranged in a state of projecting along the edge of the elevator door 1, and the lower end 1 of this operating piece 12 is shown.
2a is loosely fitted in the guide groove 11 of the threshold 5. And
The lower end 12a of the operating piece 12 is guided by the guide groove 11 and slides.

That is, in the safety device for the elevator door according to the present embodiment, the guide groove 11 is provided in the sill 5, the lower end 12a of the operating piece 12 is extended and loosely fitted in the guide groove 11, and the others are conventional. It has the same configuration as the example. Therefore, as in the conventional case, the elevator door 1 is suspended by the rollers 6 rolling on the rails 7 so as to be openable and closable leftward and rightward, and the lower portion is guided by the shoes sliding inside the sill 5. Further, the operating piece 12 is arranged so as to be movable to the elevator door 1 via the parallel link mechanism 3. That is,
The operating piece 12 is attached to the tip of the elevator door 1 so as to be movable back and forth by the link 3a pivotally supported by the fulcrum 3d of the parallel link mechanism 3 fixed to the elevator door 1. A switch 3b for reversing the elevator door 1 is incorporated in the parallel link mechanism 3.

In the safety device for an elevator door having this structure, when the elevator door 1 is closed, for example, when a cord-like foreign substance 8 such as a cord is located at the tip of the elevator door 1, the foreign substance 8 is also present. Becomes a resistance and moves the operating piece 12 backward, so that the switch 3b is operated and the closing operation of the elevator door 1 is reversed. Therefore, there is no possibility that the operation of the elevator will be started with the string-like foreign matter 8 such as a cord being sandwiched. Further, the lower end 12a of the operating piece 12 is loosely fitted in the guide groove 11 of the threshold 5, and the lower end 12a of the operating piece 12 is formed.
Since there is no gap between the upper surface 5a of the sill 5 and the upper surface 5a of the sill 5, there is no possibility that the foot of the passenger is caught.

As described above, the safety device for the door of the elevator according to this embodiment includes the elevator door 1 for opening and closing the door of the elevator and the parallel link mechanism 3 along the edge of the elevator door 1 on the door closing side. And a lower end 12a of the operating piece 12 that is slidably fitted in the operating piece 12 arranged so that it can be moved back and forth, and guides the lower end 12a of the operating piece 12 when the elevator door 1 is opened and closed. The sill 5 having the groove 11 and the backward movement of the operating piece 12 with respect to the elevator door 1 are detected by the switch 3b, and the elevator door 1
And a safety means for controlling the closing operation.

That is, the safety device for the elevator door according to the present embodiment is provided with the operating piece 12 which is movably arranged along the edge of the elevator door 1 on the door closing side via the parallel link mechanism 3. The lower end 12a is loosely fitted in the guide groove 11 of the sill 5 in a slidable state, the movement of the operating piece 12 in the backward direction is detected, and the closing operation of the elevator door 1 is controlled.

Therefore, according to the elevator door safety device of this embodiment, there is no gap between the lower end 12a of the actuating piece 12 and the upper surface 5a of the sill 5, and the string-shaped small cross section is formed at the lowermost portion of the tip of the elevator door 1. Even if the foreign matter 8 such as the body is located, the operating piece 12 moves in the backward direction with respect to the elevator door 1,
The closing operation of the elevator door 1 is controlled. Further, there is no possibility that the toes of the passengers will be caught between the lower end 1a of the elevator door 1 and the upper surface 5a of the sill 5. Therefore, the elevator is not operated while the foreign matter 8 such as a string-like object is sandwiched at the lowermost part of the tip of the elevator door 1, and the safety is improved.

In this embodiment, the foreign matter 8 having a small cross section on the upper surface 5a of the sill 5 or the foot of the passenger is the actuating piece 1.
When it comes into contact with 2, the actuating piece 12 becomes a pair of parallel link mechanisms 3.
Thus, the elevator door 1 is turned upside down by moving the switch 3b while moving upward. Therefore, the operating piece 12
The lower end 12a of the operating piece 12 remains in the threshold 5 even after moving upward.
In order that the loose fitting state can be maintained in the guide groove 11, the fitting insertion length of the lower end 12a of the operating piece 12 needs to be determined in advance.

Further, a hole for discarding foreign matter such as pebbles is formed in the bottom surface of the guide groove 11, and foreign matter such as pebbles enters the bottom of the guide groove 11 of the threshold 5 in which the operating piece 12 is loosely fitted. The actuating piece 12 may not be accidentally moved during the door closing operation of the elevator door 1.

[0019]

As described above, the safety device for an elevator door according to the present invention includes an elevator door, an operating piece, and
A state in which a lower end of an operating piece, which is provided with a sill and a safety means and is movable along a door-closing side edge of an elevator door via a parallel link mechanism, can slide in a guide groove of the sill. By loosely fitting, the movement of the operating piece in the backward direction is detected to control the closing operation of the elevator door, so that the gap between the lower end of the operating piece and the upper surface of the sill is eliminated, and a string-shaped object with a small cross section is attached to the tip of the elevator door. Even if a foreign object such as a passenger or the foot of the passenger is located, the operating piece moves in the backward direction with respect to the elevator door, the closing operation of the elevator door is controlled, and the foreign object such as a string-like object and the foot of the passenger Is not sandwiched between the lower edge of the elevator door and the threshold,
The safety is improved because the elevator will not be operated while foreign matter such as a string-like object is caught in the end of the elevator door.

[Brief description of drawings]

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

FIG. 2 is an enlarged side view of essential parts showing a safety device for an elevator door of FIG. 1.

FIG. 3 is a front view showing a conventional safety device for an elevator door.

[Explanation of symbols]

 1 Elevator Door 1a Lower End 3 Parallel Link Mechanism 3a Link 3b Switch 3c Stopper 3d Support Point 4 Rivet 5 Sill 5a Upper Surface 6 Roller 7 Rail 8 Foreign Object 11 Guide Groove 12 Operating Piece 12a Lower End

Claims (1)

[Claims] 1. An elevator door that opens and closes an entrance and exit of an elevator; an actuating piece disposed so as to be movable along a door closing side edge of the elevator door via a parallel link mechanism; and the actuating piece. A sill having a guide groove whose lower end is loosely fitted in a slidable state, and a safety means for detecting the backward movement of the operating piece and controlling the closing operation of the elevator door. Safety device for elevator doors.