JPH07157250A - Door closing notice alarm device for cargo elevator - Google Patents

Abstract

PURPOSE:To prevent an accident before occurrence such that a forklift collides against a door during closing to damage it by lighting a door closing notice warning lamp, mounted in a cage, before a fixed time of starting door closing, and on/off lighting the lamp, after lighted, after the fixed time. CONSTITUTION:When an elevator arrives at an objective story to open a door, contacts A1, A2 of relays for detecting this door are closed. Then, a continuously operating timer TA starts time limit counting, and when this time limit counting is completed, make contacts TA1, TA2 are turned on, to light a closing notice warning lamp L and to sound a door closing notice warning buzzer BZ. An interrupted operating timer TB starts time limit counting, and when this timer completes the time limit counting, a make contact TB1 is turned on, to carry a current in a flicker device F. Simultaneously with opening the door, a door closing starting timer TC starts time limit counting, and when it is completed, a door closing command is generated to close the door.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator door closing warning device, and more particularly to an alarm device suitable for an elevator door closing warning device that uses a forklift to carry in and carry out luggage.

[0002]

2. Description of the Related Art In a conventional luggage elevator, a method of giving a warning when a door starts to be closed includes a method of sounding a buzzer at a certain time before the door is closed, a lamp installed in a hall and a car, and a rotating lamp. There was a method to turn on the light to warn the forklift driver that the door was closed. As a related known example, as in Japanese Patent Laid-Open No. 3-31185, there is an example provided with an acoustic device that emits a sound during the door opening extension operation according to the operation of the door opening extension device to extend the opening time of the door. is there.

However, in this method, when the driver of the forklift becomes accustomed to handling, even if the buzzer sounds or the lamp or revolving light is turned on, the forklift driver does not immediately retract from the inside of the car. , Which could damage the door.

[0004]

Although the above-mentioned prior art has achieved the object as a door closing warning device,
Even so, a forklift collided with the door being closed, causing an accident.

In the present invention, the operation of the conventional door closing warning device has two patterns, the first step is the same as the conventional one, and the second step is the forklift warning as a warning to evacuate the forklift from the car. By alerting the carrier, it is to prevent damage accidents.

[0006]

[Means for Solving the Problems] In order to achieve the above object, the operation of a buzzer or lamp for notice of door closing is made into two patterns, and first, as a first step, for a notice of door closing before a fixed time before the start of door closing , The buzzer sounds or the lamp is turned on, and then the second step is performed by turning on and off the buzzer and turning the lamp on and off (flicker lighting) when a certain time elapses from the start of the operation of the first step. This is a method to warn persons. When a rotating lamp is used as the lamp, only the lamp is turned on in the first stage, and the second stage is operated as a rotating lamp (flicker lighting) by applying power to the motor.

[0007]

[Function] In a elevator for loading and unloading luggage using a forklift, the forklift is not as agile as a human being, so if the door is closed in a short time after a warning is issued, the forklift will There is a higher risk of the car colliding with the door and damaging the door. Also, on the other hand,
If the door is closed for a long time after the door close warning is given, the risk is reduced, but when the forklift driver gets used to the time, it is conjectured that there is time. However, there is a drawback that the risk of collision of the forklift with the door being closed increases on the contrary because the work is continued without immediately going out of the car.

In the present invention, these alarm devices are patterned in two steps, and the first step turns on the door closing warning lamp (or sounds the door closing warning buzzer) at a certain time before the door starts to be closed. Then, as a second step, the lamp is turned on (or the buzzer is sounded), and after a certain period of time, the fixed defect is improved by changing to intermittent lighting or intermittent sound that gives a feeling of tension to humans.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.

FIG. 1 is a control circuit showing an embodiment of the present invention, and FIG. 2 is an explanatory view of an operation mode of a door closing warning device.

In FIG. 1, A1 and A2 are break contacts of a relay (not shown) which is turned on when the elevator car door and the hold door are closed, and when both doors are opened, the contacts A1 and A2 are closed. Become. T
A is a timer for continuous operation which operates after a predetermined time after the door is opened, TA1 and TA2 are make contacts of the timer TA, and T is a make contact.
B is a timer for intermittent operation that operates after a lapse of a certain time after the timer TA is operated, TB1 is a make contact of the timer TB, TB2 is a break contact, F is a flicker device, and F1 is the contact, which is turned on and off at a constant cycle. repeat. L is a lamp for warning of door closing, BZ is a buzzer for warning of door closing, and TC is a timer for starting door closing, which is connected to the power sources P and N.

Now, a description will be given of how the elevator arrives at the destination floor, the door is opened, and after a certain period of time elapses, the door is closed by the door close command. When the door is opened, the contacts A1 and A2 of the relay (not shown) for detecting it are closed. Timer TA
Power is applied by the P-A1-TA-N circuit to start timed counting. When the continuous operation timer TA completes the timed counting, its make contacts TA1 and TA2
Turns on. In the P-TA1-TB2-L-N circuit, the lamp L for the door closing warning is lit, and the P-TA1-TB2
-BZ-N circuit allows buzzer BZ
Sounds. The P-TA2-TB-N circuit causes the intermittent operation timer TB to start timed counting.
When the timer TB completes the timed counting, the make contact TB1 is turned on, power is applied to the flicker device in the circuit P-TB1-F-N, and the contact F1 is repeatedly turned on and off. The door closing warning lamp L and the buzzer BZ are cut off from the power supply by opening the break contact TB2 of the timer TB, but immediately by the circuit of P-F1-LN and the circuit of P-F1-BZ-N. Power is applied. However, in this case, since the contact point of F1 is the contact point of the flicker device, it is repeatedly turned on and off, and the lamp L for the door closing warning and the buzzer BZ are now in an intermittent operation.
The timer TC for opening the door closes at the same time as the door opens.
The timer TC starts the time counting in the circuit of -TC-N and completes the time counting of the door closing time. The timer TC is turned on, and the contact (not shown) issues a door closing command to start closing the door. When the door is closed, timer TA, timer T
B, the timer TC is turned off, so that the flicker device is also disconnected from the power source, the lamp for the door closing warning and the buzzer BZ also stop operating.

The time limit of the timer is a timer TC for starting the door closing,
If the intermittent operation timer TB and the continuous operation timer TC are set to be long in this order, as shown in FIG. 2, the door closing warning lamp and the buzzer operate continuously in the first stage and in the second stage. The intermittent operation is performed at the step, which prompts the driver of the forklift to call out and prevents damage due to a collision between the forklift and the door being closed.

[0014]

According to the present invention, a lamp or a buzzer as a door closing warning device is formed into two patterns of continuous operation and intermittent operation, and continuous operation is performed in the first stage and intermittent operation is performed in the second stage. The forklift driver can give a precise alarm and can prevent an accident that causes the forklift to collide with a door being closed and damage it.

[Brief description of drawings]

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

FIG. 2 is an explanatory diagram of operation modes of a door closing warning lamp and a buzzer.

[Explanation of symbols]

TA ... Continuous operation timer, TB ... Intermittent operation timer, T
C ... Door closing start timer, L ... Door closing warning lamp, BZ ... Door closing warning buzzer, F ... Flicker device.

Claims (2)

[Claims] 1. In an elevator for transporting luggage, when a door closing warning lamp mounted in a car is turned on a certain time before the door starts to be started, and a certain time has elapsed after the lamp is turned on,
An elevator control device characterized by blinking this lamp. 2. A door closing warning buzzer is attached to a car in addition to the door closing warning lamp according to claim 1, and a buzzer sounds at a certain time before the door starts to start, and a certain time after the buzzer sounds. Elevator controller that sounds the buzzer intermittently when the time has passed.