JPS6118515B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to an improved safety device for passengers at elevator entrances and exits.

Elevator landings are equipped with landing doors, and elevator cars are equipped with car doors, which open and close automatically in conjunction with each other. Therefore, when closing the door, there is a risk that the passenger may become trapped in the door.

To prevent this, various safety devices are used, some of which utilize energy waves such as ultrasonic waves. This is shown in FIG.

In the figure, 1 is an elevator car, 2 is an entrance to the car, 3 is a car door, and 4 is a gate provided at the top of the car 1, such as the one shown in the embodiment of Japanese Patent Application Laid-Open No. 52-73442. A transmitting device in which a pulse generating circuit is disposed and transmits an energy wave 4a having a pulse to the landing side, 5 a receiving device that also receives a reflected wave of the energy wave 4a, 6 a landing entrance, 7
is the door of the landing, and 8 is the passenger of the landing.

That is, the energy wave 4a is transmitted to the landing side,
By receiving the reflected wave with the receiving device 5,
The presence or absence of passengers 8 is detected by constructing a device that has a three-dimensional detection range and can detect a large number of passengers 8 at the landing. When a passenger 8 is detected, the car door 3 and the landing door 7 (hereinafter simply referred to as the door) are stopped, reversed and opened, and the door closing operation of the doors 3 and 7 is controlled to detect the passenger. Prevent 8 from getting caught between doors 3 and 7.

However, even when the car 1 is full and no more passengers 8 can board, this safety device continues to control the door closing operation as long as the passenger 8 is within the detection range of the energy wave 4a. As a result, doors 3 and 7 will not close and car 1 will not be able to depart, which will unnecessarily lengthen the elevator's operating time and degrade elevator service. In the case of facilities, it is rare for there to be no passengers within the energy wave detection range, and the elevators will be unable to operate.

This invention aims to improve the above-mentioned problems, and provides a safety device at the entrance and exit of the elevator that prevents the door closing operation from being unnecessarily prolonged by controlling the door closing operation when the car is full and the car cannot be boarded. The purpose is to provide.

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

In Figure 2, 4b is a reflected wave of energy wave 4a, 9
10 is a driving device that drives the transmitting device 4, and 10 is a passenger 8.
11 is a door closing control device that operates based on the output of the detection device 12 and controls the door closing operation by the door opening/closing motor 12; This is a load detection device that emits an output when the load exceeds a predetermined value.

Next, the operation of this embodiment will be explained.

Assume now that car 1 is stopped at landing entrance 6 and doors 3 and 7 are open. Then, at the same time that the doors 3 and 7 are driven in the door closing direction, an energy wave 4a is transmitted from the transmitting device 4 to the landing side, and the reflected wave 4b is received by the receiving device 5. When the reflected wave 4b is a steady one from a fixed body such as a landing floor, the detection device 10 does not operate and the door closing control device 11
issues a door closing command, drives the electric motor 12 in the door closing direction, and when the doors 3 and 7 are completely closed, the car 1 departs.

Next, when there is a passenger 8 in the hall and the energy wave 4a is reflected by him, and this reflected wave 4b is received by the receiving device 5, the detection device 10 operates and emits an output. At this time, if the load inside the car 1 is less than a predetermined value, the load detection device 13 does not output any output. Now, the output of the detection device 14 causes the door closing control device 11 to
controls the electric motor 12 to control the door closing operation by stopping the movement of the doors 3 and 7 or restarting the movement of the doors 3 and 7. Therefore, the passenger 8 is prevented from being caught between the doors 3 and 7.

At this time, if the load inside the car 1 is higher than a predetermined value (i.e., the car cannot be boarded), the load detection device 1
3 emits an output. Now, even if the detection device 10 is emitting an output, the control of the door closing operation by the door closing control device 11 is canceled, and the door closing command is issued in the same way as when the passenger 8 is not present, and the electric motor 12 is moved in the door closing direction. When the doors 3 and 7 are completely closed, the car 1 departs.

FIG. 3 shows another embodiment of the invention.

This embodiment is the same as that in FIG. 2 except that the output of the load detection device 13 is input to the detection device 10.

When the load detection device 13 generates an output, the detection device 10 stops generating the output. Therefore,
Even if there is a passenger 8, the result is the same as when there is no passenger 8, a door closing command is issued and doors 3 and 7 are closed.

Moreover, when the load detection device 13 emits an output,
Decreasing the energy amount of the energy wave 4a from the transmitting device 4, changing the transmitting direction of the transmitting device 4 or the receiving direction of the receiving device 5, or changing the transmitting direction of the transmitting device 4 or the receiving direction of the receiving device 5. Or, by shielding the transmitting port of the transmitting device 4 or the receiving port of the receiving device 5 with a shielding plate (not shown) to reduce the energy amount of the energy wave 4a or reduce the receiving sensitivity. , a door closing command may be issued.

As explained above, in this invention, an energy wave having pulses is transmitted to the landing area, and passengers are detected in a relatively wide area of the landing area.If the load inside the car at that time is more than a predetermined value, no passenger is detected. Since the door close command is given to the door even when the car is full, unnecessary control of door closing operation caused by passengers present at the landing entrance when the car is full and no more passengers can board is eliminated. This makes it possible to prevent an unnecessary increase in elevator operation time, and improve operating efficiency, especially in elevators where there are often a large number of passengers in the hall.

[Brief explanation of the drawing]

FIG. 1 is a vertical side view of an elevator entrance showing a conventional elevator entrance safety device, FIG. 2 is a block circuit diagram showing an embodiment of the elevator entrance safety device according to the present invention, and FIG. FIG. 2 is a diagram corresponding to FIG. 2 showing an embodiment of the present invention. 1... Elevator car, 3... Car door, 4
... Transmitting device, 4a... Energy wave, 4b... Reflected wave, 5... Receiving device, 7... Landing door, 8...
Passenger, 10...detection device, 11...door closing control device, 12...door opening/closing motor, 13...load detection device. Note that the same parts in the figures are indicated by the same reference numerals.

Claims (1)

[Claims] 1. An energy wave having a pulse is transmitted from a transmitting device installed in a car to a landing area, and the reflected wave is received by a receiving device, so that the detection range has a three-dimensional spread. A device capable of detecting a large number of passengers is provided to prevent the door from closing when a passenger at the landing is detected by the reflected wave, and to issue a door closing command to the door when no passenger at the landing is detected. In the device, there is a load detection device that operates when the internal load of the car exceeds a predetermined value, and when the load detection device operates, the door closing command is given to the door to close the door even if the object is detected. A safety device for an elevator entrance, characterized by being equipped with a command device. 2. The elevator entrance/exit safety device according to claim 1, which uses a door closing command device that issues a door closing command by releasing the blocking of the closing operation of the door. 3. The elevator entrance/exit safety device according to claim 1, which uses a door closing command device that issues a door closing command by stopping the detection output of an object. 4. The elevator doorway safety device according to claim 1, which uses a door closing command device that issues a door closing command by reducing the energy amount of energy waves. 5. The elevator doorway safety device according to claim 1, which uses a door closing command device that issues a door closing command by lowering the sensitivity of a receiving device. 6. The elevator doorway safety device according to claim 1, which uses a door closing command device that issues a door closing command by changing the transmitting direction of the transmitting device or the receiving direction of the receiving device.