JPH06278966A - Safety device for elevator - Google Patents

Abstract

PURPOSE:To improve safety relating to passengers and persons of a landing by setting a detection signal from each load detecting switch to a control signal for moving a car in a reverse direction stopped in the former story to control a door opened, so as to reduce an accident and trouble in the case that the car is moved with a door left as interposing an object. CONSTITUTION:When a car begins to move in a condition that a cord-shaped object is interposed between a landing and the car, the interposed object is gradually pulled according to moving the car, to apply tension. Thus by applying force to an upper part load detecting switch 14 or to a car sill 15 with load detecting switch, the object is detected to be interposed. Then, first the car is emergency stopped, next moved slowly in a reverse direction to the direction, where moved up to this time, and stopped in a story where stopped before started moving. Finally a door is opened. Consequently, an accident and trouble, when the car is moved with the object left as interposed by the door, can be decreased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator safety device for ensuring safety when a car moves while an object is caught in a door.

[0002]

2. Description of the Related Art FIG. 6 shows the structure of a conventional car door portion. Reference numeral 1 is a digit, 2 is a car door rail, and 3 is a gate switch for detecting the full opening of the car door. . 4 is a basket door hanger that moves left and right on the basket door rail 2, 5 is a basket door suspended from the basket door hanger 4, 6 is a safety door edge for detecting that the basket door 5 has hit an object while the door is closed, 7 Is a basket threshold.

FIG. 7 shows the structure of a conventional hall door portion. 8 is a hall door rail, 9 is a hall door hanger that moves left and right on the hall door rail 8, and 10a and 10b are opened from the outside while the door is fully opened. With the interlocks on the working side and the fixed side to prevent the interlock, the interlock 10 on the working side is provided.
A is attached to the hall door hanger 9 and is engaged with the fixed side interlock 10b when fully closed. A door switch 11 detects that the door is fully closed, and operates when both interlocks 10a and 10b are engaged with each other. 1
2 is a hall door suspended from the hall door hanger 9, and 13 is a hall sill.

The conventional elevator is constructed as described above, and the door is opened and closed by connecting the car door 5 shown in FIG. 6 and the hall door 12 shown in FIG. Then, during the door closing operation, the safety door edge 6 is projected, and when it hits an object, it is retracted, the switch is turned on, and the door is opened. Further, when an object is sandwiched in a place that is not detected by the safety door edge 6, the gate switch 3 or the door switch 11 does not detect the fully closed state, and the basket does not move.

[0005]

In the conventional elevator as described above, the safety door edge 6 does not operate unless a certain amount of force is applied. Therefore, in the case of a light object, the safety door edge 6 is pushed and closed as it is. Also, the gate switch 3 or the door switch 11 is several mm
Even if there is a small gap, the full closure is detected, so the basket may start moving with a thin object in the center. And
After moving, there is no means for detecting the pinching. Therefore, when an object is caught between the basket and the landing, it is detected as a failure such as an overload, and an emergency stop occurs and the operation becomes impossible. That is, there is a problem in that a load is applied to a person or an object that has been caught until a failure occurs, and even if a failure is detected, the load remains as it is because it is simply stopped.

The present invention has been made to solve the above problems, and it is possible to reduce accidents and breakdowns when a basket moves while an object is sandwiched between doors, and it is safe for passengers and people in the hall. It is an object of the present invention to provide an elevator safety device that can improve the safety.

[0007]

A safety device for an elevator according to the present invention includes a load detection switch for detecting a load generated when a car starts to move while an object is being caught in a door, respectively, at a top of a doorway of an elevator and a car sill. Provided, by the detection signal from each of these load detection switches,
The car was moved in the opposite direction to the original floor, and the door was opened.

[0008]

In the elevator safety device configured as described above, when the basket starts to move with an object being caught in the door,
The load detection switch detects this. Then move the basket in the opposite direction to stop at the original floor and open the door. Therefore, accidents and breakdowns can be prevented, and safety for passengers and people in the hall can be improved.

[0009]

【Example】

Example 1. 1 and 2 show an elevator safety device according to an embodiment of the present invention.
6, 8 to 13 are exactly the same as those of the prior art. Reference numeral 14 is an upper load detection switch for detecting that the basket is lowered while holding an object, and is attached to the digit 1. Reference numeral 15 denotes a basket sill with a load detection switch that detects that the basket has risen while holding an object.

FIG. 3 shows a basket sill 15 with a load detection switch.
4 is an enlarged view of FIG. 4 and FIG. 5 is a configuration diagram of a switch portion when the basket sill 15 with a load detection switch is viewed from the side. In the figure, reference numeral 15a denotes a fixed portion of the cage sill 15 with a load detection switch, and 15b denotes a similar operation portion, which is configured to operate at an angle of 45 degrees with respect to the fixed portion 15a. 15c
Is a spring that constantly urges the operating portion 15b outward,
15d is an operating portion 15b which resists the biasing force of the spring 15c.
Is a coil for pulling back inward, and 15e is a contact for detecting the operation of the operation unit 15b.

Next, the operation of the first embodiment will be described.
As shown in FIG. 1, when a car starts to move with a string-shaped object sandwiched between the landing and the basket, the object sandwiched by the movement of the basket is gradually pulled to apply tension. This allows
A force is applied to the upper load detection switch 14 or the cage sill 15 with the load detection switch to detect that an object is caught. Then, the car first comes to an emergency stop, then slowly moves in the opposite direction to the direction in which the car had been moving until it stops at the floor that had been stopped before it started moving. And finally the door opens. Therefore, it is possible to reduce the number of accidents and malfunctions that occur when moving with an object sandwiched between the doors.

By the way, a basket sill 1 with a load detection switch
In No. 5, when the load is not applied, the operating portion 15b projects outward as shown in FIG. 5, and when a load is applied, the operating portion 15b pulls inward as shown in FIG. Touch and detect movement. However, if the operating portion 15b projects outward when getting on and off, passengers may stumble, and if the operating portion 15b moves, the stability is also poor. In view of this, in this embodiment, the coil 15d is excited to pull the operating portion 15b inward while the door is open, so that the moving portion 15b is at the same height as the fixed portion 15a so as not to move, as shown in FIG. Thus, it is possible to prevent tripping, reduce the number of operations, and extend the life. In addition, the operating unit 15b is slanted 45
Since it operates in degrees, it can handle loads in various directions.

Example 2. In the first embodiment, the fixed portion 15
The case where the cage 15 with the load detection switch is configured by providing the operating portion 15b, the spring 15c, the coil 15d, and the contact point 15e in a has been described. If possible, a load detection switch other than the above configuration can be used. Upper load detection switch 1
The same applies to 4.

[0014]

The present invention is configured as described above, and when the load is detected by the load detecting switch, the basket is moved in the opposite direction to stop at the original floor and the door is opened. In addition, it is possible to reduce accidents and breakdowns when the basket moves with an object sandwiched between the doors, and it is possible to improve safety for passengers and people in the hall.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a first embodiment of the present invention.

FIG. 2 is a configuration diagram of a car door portion of FIG.

FIG. 3 is an enlarged view of the car threshold with the load detection switch of FIG. 1.

FIG. 4 is a main part configuration diagram of a basket sill with a load detection switch, showing a state in which the operation unit is retracted inward.

FIG. 5 is a view corresponding to FIG. 4, showing a state in which the operating portion is projected outward.

FIG. 6 is a configuration diagram showing a conventional basket door portion.

FIG. 7 is a configuration diagram showing a conventional hall door portion.

[Explanation of symbols]

 1 digit 2 basket door rails 4 basket door hangers 5 basket doors 8 landing door rails 9 landing door hangers 12 landing doors 13 landing sill 14 upper load detection switch 15 basket sill with load detection switch

Claims (1)

[Claims] 1. A load detection switch for detecting a load generated when a car starts moving while an object is being sandwiched between doors is provided on an upper part of an entrance of an elevator and a car sill, and a detection signal from each of the load detection switches is supplied to the car. The elevator safety device is characterized in that the control signal is used to control the door opening by moving the vehicle in the opposite direction and stopping it at the original floor.