JPH08198553A - Safety device for elevator door - Google Patents

Abstract

PURPOSE: To provide a safety device for an elevator door sounding an alarm only when a landing door in danger of fall is opened. CONSTITUTION: A safety device for an elevator door is provided with alarm devices 1-4, 1BZ-4BZ for sounding the alarm to door opening detected floors when door opening detecting devices 1Da-4Da detect the opening of landing doors other than the landing door of the stop floor of a car 1C and the landing door of one floor above the stop floor of the car 1C.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a safety device for an elevator door.

[0002]

2. Description of the Related Art In an elevator, if a landing door on a landing floor without a car is opened, there is a risk of falling into the hoistway. In an elevator hall door safety device provided with a switch for detecting closing, during normal operation, the car door switch is activated when the car door is closed, and one of the plurality of hall door switches is activated. There has been proposed a safety device for an elevator hall door, which is provided with a detection device for detecting that the detection device is not operating and a warning device for issuing a warning when the detection device is activated.

[0003]

The above prior art has a problem that the alarm does not sound even when the hall door is opened when the car door is opened.

Further, when the passenger gets on the car, the alarm sounds even if the landing door on the first floor of the car stop floor is opened. In other words, no matter which door you open, the alarm will sound, and you will get used to the alarm. If you open the door with the intention of getting on the car, you will fall into the pit without a car.

It is an object of the present invention to provide a safety device for an elevator door, which issues an alarm only when the landing door, which has a risk of falling, is opened.

[0006]

In order to achieve the above object, a door open detection device for detecting the opening of the elevator car door and a plurality of landing doors is provided, and the door open detection device detects the door open. In the safety device of the elevator door that was designed to prevent the traveling of the elevator when
When the door opening detection device detects the opening of a landing door other than the landing door of the floor where the car is stopped and the floor where the car is stopped, an alarm device is provided to issue an alarm to the door opening detection floor. It is a thing.

[0007]

With this configuration, the alarm device is activated when there is no car on the floor where the hall door is opened and when there is no car under the floor on the first floor of the floor. In this way, an alarm is issued to the door-opening floor only when the landing door on the floor where there is a danger of falling from the landing is opened, so accidents such as getting used to work and accidentally falling down in the hoistway can be prevented. .

[0008]

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

In the figure, the first-floor door 1 is provided between the power sources P and N.
Normally open contact 1Da of the first floor door open detection relay (not shown) that is activated when D opens, and normally closed contact 1 of the first floor stop detection relay (not shown) that is activated when the car 1C arrives at the first floor 1F.
Fb and a first-floor alarm command relay 1 having a normally open contact 1a for ringing a buzzer 1BZ installed on the first floor 1F are connected in series.

Similarly, the second floor door 2 is connected between the power supplies P and N.
Normally open contact 2Da of the second floor door open detection relay (not shown) that is activated when D opens, and normally open contact 3 of the third floor stop detection relay (not shown) that is activated when the car 1C arrives at the third floor 3F.
Fa and a second-floor alarm command relay 2 having a normally-open contact 2a for ringing a buzzer 2BZ installed on the second-floor 2F are respectively connected in series, and the car 1C is connected in parallel with the normally-open contact 3Fa.
A normally open contact 4Fa1 of a not-shown fourth-floor stop detection relay that is energized when the vehicle arrives at the floor is connected.

Similarly, the third floor door 3 is provided between the power sources P and N.
Normally open contact 3Da of the third floor door open detection relay (not shown) that is activated when D opens, normally open contact 1Fa1 of the first floor stop detection relay (not shown), and buzzer 3B installed on the third floor 3F.
Third-floor alarm command relays 3 each having a normally-open contact 3a for ringing Z are connected in series, and in parallel with the normally-open contact 1Fa, a normally-open contact 4Fa2 of a not-shown fourth-floor stop detection relay
Is connected.

Similarly, the fourth floor door 4 is connected between the power sources P and N.
A normally open contact 4Da of a door open detection relay (not shown) that is activated when D opens, a normally open contact 1Fa2 of a stop detection relay (not shown) on the first floor, and a buzzer 4B installed on the fourth floor 4F.
The fourth-floor alarm command relays 4 each having a normally-open contact 4a for ringing Z are connected in series, and are connected in parallel to the normally-open contact 1Fa2, and are activated when the car 1C arrives at the second floor 2F. The normally open contact 2Fa is connected.

Similarly, the normally-open contact 1a is provided between the power supplies P and N.
And a buzzer 1BZ are connected in series. Hereinafter, a normally open contact 2a and a buzzer 2BZ, a normally open contact 3a and a buzzer 3B are connected between the power supplies P and N.
Z, the normally open contact 4a and the buzzer 4BZ are connected in series.

Next, the operation will be described.

Now, when the car 1C is stopped at the second floor 2F, a key (not shown) is inserted into the keyhole 4DA provided in the fourth floor door 4D in an attempt to get on the car 1C from the fourth floor 4F. When you open the floor door 4D, P-4Da-2Fa-4-
The circuit of N is formed and the 4th floor alarm detection relay 4 is energized,
The buzzer 4BZ sounds in the circuit of P-4a-4BZ-N, so the person who tried to open the door 4D on the 4th floor has 3 cars in the car 1C.
You can see that it is not stopped on the 3rd floor.

Buzzers 1BZ to 4B installed on each floor
Z ringing condition, that is, 1st to 4th floor alarm detection relays 1
The urging conditions of ~ 4 are that the car 1C is not stopped on the first floor 1F when the first floor door 1D is opened, and the car 1C is the third floor 3F and the fourth floor when the second floor door 2D is opened. When stopped on 4F, when the third floor door 3D is opened, when the car 1C is stopped on the first floor 1F, fourth floor 4F, and when the fourth floor door 4D is opened, as described above Basket 1C is on the second floor 2F
There are two cases, one is on the 1st floor and the other is on the 1st floor.

In this way, when the first to fourth floor doors are opened and there is a danger of falling, the buzzers 1BZ to 4BZ are activated to prevent a falling accident.

Although the present embodiment has described the case of four floors, it is clear that any number of floors may be used.

[0019]

According to the present invention, the alarm device is operated when there is no car on the floor where the hall door is opened and when there is no car under the first floor of the floor. In this way, an alarm is issued to the door-opening floor only when the landing door on the floor where there is a danger of falling from the landing is opened, so accidents such as getting used to work and accidentally falling down in the hoistway can be prevented. .

[Brief description of drawings]

FIG. 1 is a circuit diagram of a main part of an embodiment of the present invention.

FIG. 2 is a perspective view showing a positional relationship between an elevator hall and a car.

[Explanation of symbols]

1Da to 4Da 1 to 4th floor Normally open contact of door open detection relay 1Fb 1st floor Stop detection relay normally closed contact 1Fa1, 1Fa2, 2Fa, 3Fa, 4Fa1, 4F
a2 1st to 4th floor stop detection relay normally open contacts 1 to 4 1st to 4th floor alarm detection relays 1BZ to 4BZ buzzer

Claims (1)

[Claims] 1. A door opening detection device for detecting opening of an elevator car door and a plurality of landing doors is provided, and when the door opening detection device detects opening of the door, the elevator is prevented from traveling. In the elevator door safety device, when the door open detection device detects the opening of a landing door other than the landing door of the floor where the car is stopped and the floor where the car is stopped, the door opening detection floor A safety device for an elevator door, which is provided with an alarm device for issuing an alarm.