JP2626821B2 - Safety devices for personnel conveyors - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a safety device for preventing danger in a personnel conveyor.

[Prior Art] Conventionally, a personnel conveyor has a structure in which driving is continued even when a person falls down at an exit, stops, or is left unattended.

[Problems to be Solved by the Invention] In a conventional personnel conveyor, when a person falls down at the exit, or stops or is left unattended, the personnel conveyor is continuously placed on the person or the object. There is a problem that the person who is transported in the room is folded and a personal injury occurs.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a safety device for a personnel conveyor that can prevent dangers when a person falls down on an exit or when an animal or an object is left.

[Means for Solving the Problems] According to the present invention, moving object detecting means for detecting that an object is moving at the exit of a personnel conveyor, and stopping at the exit based on the output signal of the moving object detection means Stopped object presence / absence determination means for determining whether or not there is an object present, and transported object detection means for detecting the presence of an object on a personnel conveyor near the exit, whereby an object is present on the personnel conveyor And a drive control means for stopping the drive of the conveyor when the stop object presence / absence determination means determines that there is a stopped object at the exit. Can be.

[Operation] According to the present invention, when an object is stopped at the exit of the personnel conveyor, the driving of the conveyor can be stopped.

Embodiment Next, an embodiment of the present invention will be described in detail based on an illustrated embodiment.

FIG. 1 shows an embodiment of a personnel conveyor.
In FIG. 1, reference numeral 1 denotes a transport belt. The conveyor belt 1 is moved in the direction of arrow a by a conveyor driving device (not shown). The transport belt 1 transports a person 2 riding on the transport belt 1 in the direction of arrow a. A guide handrail 3 is provided adjacent to the conveyor belt 1.

A distance sensor 5 is provided near the exit 4 of the conveyor belt 1.
Are arranged. The distance sensor 5 measures the distance between the object and an object such as a person, an animal, or luggage on the exit 4. The distance sensor 5 is configured by a sensor using an ultrasonic wave or a light beam.

A transport object sensor 6 is disposed on the side of the transport belt 1 near the exit 4. The transport object sensor 6 detects that there is an object transported by the transport belt 1. The transport object sensor 6 is configured by a sensor using light or ultrasonic waves.

As shown in FIG. 2, the output value of the distance sensor 5 is given to an output value comparison circuit 7 and an output value presence / absence determination circuit 8.

The output value comparison circuit 7 outputs the distance sensor 5
The ON signal is output only when this difference is equal to or less than a predetermined value. If this difference is less than the specified value,
This means that the object is stopped at the exit 4 or that there is no object at the exit 4.

The output value presence / absence determination circuit 8 outputs an ON signal only when the output value of the distance sensor 5 is within the reference range. When the output value of the distance sensor 5 is within the reference range,
Means that there is an object at

The outputs of the output value comparison circuit 7 and the output value presence / absence determination circuit 8 are supplied to a stationary object presence / absence determination circuit 9. The ON signal is output only when the transport object sensor 6 detects an object on the transport belt 1.

Only when both the output value comparison circuit 7 and the output value presence / absence determination circuit 8 output an ON signal, the stopped object presence / absence determination circuit 9 outputs an ON signal.

When both the output value comparison circuit 7 and the output value presence / absence determination circuit 8 output the ON signal, it means that the object is stopped at the exit 4. When the transport object sensor 6 outputs an ON signal, it means that there is an object on the transport belt 1 near the exit 4.

Therefore, only when there is a stationary object at the exit 4 and there is an object on the conveyor belt 1 near the exit 4, the stationary object presence / absence determination circuit 9 and the transport object sensor 6
Output an ON signal.

The outputs of the stopped object presence / absence determination circuit 9 and the transported object sensor 6 are given to the drive control circuit 10. The drive control circuit 10 controls the conveyor drive device 11. The conveyor driving device 11 moves the conveyor belt 1.
When both the stopped object presence / absence determination circuit 9 and the conveyed object sensor 6 output an ON signal, the drive control circuit 10 stops the operation of the conveyor driving device 11 and stops the convey belt 1.

FIG. 3 shows another embodiment of the present invention, which will be described below.

In the embodiment shown in FIG. 3, a Doppler radar 12 is arranged near the exit 4 instead of the distance sensor 5 in the embodiment shown in FIG.

The Doppler radar 12 transmits a microwave toward an object, receives a reflected wave from the object, mixes the reflected wave with a part of the transmitted wave, and measures the Doppler frequency shift. The output of the Doppler radar 12 is supplied to a Doppler frequency shift presence / absence determination circuit 13 and a reflected wave presence / absence determination circuit 14.

The Doppler frequency shift presence / absence determination circuit 13 outputs an ON signal only when the reflected wave received by the Doppler radar 12 has no Doppler frequency shift. That is, the Doppler frequency shift presence / absence determination circuit 13 outputs an ON signal when the object is stopped at the exit 4 or when there is no object.

The reflected wave presence determination circuit 14 outputs an ON signal only when the Doppler radar 12 receives a reflected wave. That is,
Circuit 14 for determining the presence or absence of a reflected wave only when there is an object at exit 4
Outputs an ON signal.

The outputs of the Doppler frequency shift presence / absence determination circuit 13 and the reflected wave presence / absence determination circuit 14 are provided to a stationary object presence / absence determination circuit 9. The outputs of the stopped object presence / absence determination circuit 9 and the transported object sensor 6 are supplied to a drive control circuit 10.

As described above, only when there is a stationary object at the exit 4 and there is an object on the conveyor belt 1 near the exit 4, the stationary object presence / absence determination circuit 9 and the transport object sensor 6
Output an ON signal.

When both the stopped object presence / absence determination circuit 9 and the conveyed object sensor 6 output ON signals, the drive control circuit 10 receiving them stops the operation of the conveyor driving device 11 and stops the conveyer belt 1.

4 and 5 show another embodiment of the present invention, which will be described below.

The embodiment shown in FIGS. 4 and 5 is such that an object sensor 15 and a pyroelectric sensor 16 are arranged near the exit 4 in place of the distance sensor 5 in the embodiment shown in FIG. It is.

The pyroelectric sensor 16 is arranged above a person when the person stands at the exit 4. The object sensor 15 is arranged to detect a leg of a person when the person stands at the exit 4.

The pyroelectric sensor 16 is a sensor using a pyroelectric element that undergoes self-polarization by a slight temperature rise upon receiving infrared rays and induces electric charge. The pyroelectric sensor 16 detects a change in far-infrared energy also caused by the movement of a heat ray radiator such as a person and an animal. Object sensor 15
Is a sensor using light or ultrasonic waves.

As shown in FIG. 5, the outputs of the object sensor 15 and the pyroelectric sensor 16 are supplied to a stopped object presence / absence determination circuit 9.

Object sensor 15 is ON only when an object is detected
Output a signal. The pyroelectric sensor 16 outputs an ON signal only when a thermal radiation body such as a person is stopped or when there is no thermal radiation body. The conveyance object sensor 6 outputs an ON signal only when an object is detected. The output of the transport object sensor 6 is given to the drive control circuit 10.

In the same manner as described above, the stop object presence / absence determination circuit 9 and the transfer object sensor are provided only when there is a thermal radiation body stopped at the exit 4 and there is an object on the conveyor belt 1 near the exit 4. 6 both output an ON signal.

When both the stopped object presence / absence determination circuit 9 and the conveyed object sensor 6 output ON signals, the drive control circuit 10 receiving them stops the operation of the conveyor driving device 11 and stops the conveyer belt 1.

In the above-described embodiment, another conveyance object sensor is provided on the side farther from the exit 4 than the conveyance object sensor 6, and the movement of the conveyance belt 1 is started when an object on the conveyance belt 1 is detected. The speed may be reduced.

Further, in the above-described embodiment, the alarm may be activated by operating the alarm for a predetermined time from the time when the stopped object presence / absence determination circuit 9 outputs the ON signal.

[Effects of the Invention] According to the present invention, danger can be prevented when a person falls down at the exit, stops, or is left unattended.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing an embodiment of the present invention, and FIG.
FIG. 3 is a block diagram showing the same embodiment, FIG. 3 is a block diagram showing another embodiment of the present invention, FIG. 4 is a partially cutaway perspective view showing another embodiment of the present invention, and FIG. FIG. 4 is a block diagram of the embodiment shown in FIG. 4. 1 ... Conveyer belt, 4 ... Outlet, 5 ... Distance sensor, 6 ...
… Conveyed object sensor, 9… Stopped object presence / absence judgment circuit, 10…
... Driving control circuit, 12 ... Doppler radar, 15 ... Object sensor, 16 ... Pyroelectric sensor.

Claims (4)

(57) [Claims] 1. A moving object detecting means for detecting that an object is moving at an exit of a personnel conveyor, and judging whether or not there is a stopped object at the exit based on an output signal of the means. Means for determining the presence or absence of a stopped object, means for detecting a conveyed object for detecting the presence of an object on a personnel conveyor near the exit, and thereby detecting the presence of an object on the personnel conveyor, and When the presence / absence determination means determines that there is a stopped object at the exit, drive control means for stopping the drive of the conveyor is provided. 2. A safety device for a personnel conveyor according to claim 1, wherein said moving object detecting means comprises a distance sensor. 3. The safety device for a personnel conveyor according to claim 1, wherein said moving object detection means comprises a Doppler radar. 4. The moving object detecting means comprises an object sensor for detecting an object at an exit of a personnel conveyor, and a pyroelectric sensor for detecting a person or an animal moving at the exit. 2. A safety device for a personnel conveyor according to claim 1, wherein: