JP2012211014A - Conveyor device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a conveyor device which prevents driving system equipment from being damaged, secures safety of a passenger and suppresses the deterioration of an operation rate, in the conveyor device which detects the magnitude of a load during operation and performs emergency stop of the operation when the magnitude of the detected load exceeds a prescribed threshold.SOLUTION: The conveyor device stores a plurality of load reference values which are smaller than a predetermined threshold and have the magnitudes different from one another and a plurality of pieces of alarm information which indicate the alarm of higher level as the load reference value becomes larger for each load reference value, and when the magnitude of the load detected by a current sensor 5 exceeds any load reference value, gains the alarm information corresponding to the magnitude of the load reference value and outputs the gained alarm information as a voice from a speaker 6.

Description

  The present invention relates to a conveyor device such as an escalator.

  Conventionally, in a conveyor device that transports passengers like an escalator, when the load of the electric motor is detected during operation and the load exceeds a predetermined threshold, in order to protect the drive system equipment and the safety of the user, It has been proposed to stop the driving emergency after giving a warning to the user with an image or sound (Patent Document 1).

JP 2011-11901 A

However, in the conveyor device provided with the safety device as described above, since the operation is stopped when the load exceeds a predetermined threshold, there is a problem that the operation rate of the conveyor device is lowered.
SUMMARY OF THE INVENTION An object of the present invention is to provide a conveyor device that can suppress a reduction in operating rate while ensuring breakage of drive system equipment and passenger safety.

The conveyor device according to the present invention is
Load detection means for detecting the magnitude of the load during operation;
Emergency stop means for emergency stopping the operation when the magnitude of the load detected by the load detection means exceeds a predetermined threshold;
Information storage means for storing a plurality of load reference values that are smaller than the predetermined threshold and different in size, and a plurality of warning information that indicates a higher level warning as the load reference value is larger for each load reference value When,
When the magnitude of the load detected by the load detection means exceeds any load reference value, warning information corresponding to the magnitude of the reference value is acquired from the information storage means, and the acquired warning information is voiced And / or notification means for outputting as video.

In the conveyor device of the present invention, in the process of increasing the load, the plurality of reference values are sequentially exceeded before the magnitude of the load reaches the threshold value. When the load size exceeds the smallest reference value, warning information representing the lowest level warning is acquired, the warning information is output as audio and / or video, and the load is increased for the passenger. Informed. In response to this, an interval for many passengers to get on the conveyor device is provided.
After that, when the magnitude of the load exceeds the next largest reference value, warning information representing the next highest level of warning is obtained, and the warning information is output as audio and / or video for further passengers. An increase in load is reported. Correspondingly, more passengers get into the conveyor device.

In this way, in the process of increasing the load, warnings at a level corresponding to the magnitude of the load are made, so that a plurality of passengers gradually leave the interval to get into the conveyor device, so the increase in load on the conveyor device is suppressed. Will be.
As a result, the frequency at which the magnitude of the load reaches the threshold and the operation is stopped is reduced, and the reduction in the operation rate due to the emergency stop is suppressed.

  When the load increases by the notification to the passenger and the load value exceeds the threshold value, the operation is emergency stopped, and the drive system equipment is damaged and the safety of the passenger is achieved.

  According to the conveyor apparatus which concerns on this invention, the fall of an operation rate can be suppressed, aiming at the failure | damage of a drive system apparatus, or a user's safety.

FIG. 1 is a diagram illustrating an embodiment of a conveyor device according to the present invention. FIG. 2 is a diagram showing another embodiment of the conveyor apparatus of the present invention. FIG. 3 is a flowchart showing the control operation of the conveyor apparatus of the present invention. FIG. 4 is a chart showing an example of the announcement in the conveyor device of the present invention.

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
In the conveyor apparatus according to the present invention, an escalator mechanism formed by connecting a plurality of steps in an endless manner is driven by an electric motor (1) as shown in FIG. 1, and electric power is supplied from a power source (2) to the electric motor (1). Is supplied.

A current sensor (3) is attached to one power supply line from the power source (2) to the electric motor (1), and the current sensor (3) is connected via an A / D converter (4). The programmable logic controller (5) is connected.
The programmable logic controller (5) is connected to a speaker (6) as a notification means.
The motor (1) is controlled in starting, stopping, and rotation speed by a control device (8) including an A / D converter (4) and a programmable logic controller (5).

  In the conveyor device, the current sensor (3) detects the magnitude of the current supplied to the electric motor (1) during operation, and the detection signal is supplied to the programmable logic controller (5). The increase in load is monitored.

  Specifically, a predetermined threshold I3 and two load reference values I1 and I2 (I1 <I2 <I3) smaller than the threshold are registered in the programmable logic controller (5), and the current sensor (3 ) From the current monitoring data X obtained through the A / D converter (4) is compared with the load reference values I1 and I2 and the threshold value I3, thereby determining the safety grade.

  Here, when the current monitoring data X exceeds the threshold value I3 due to an increase in load, an announcement indicating a warning (safety class 3) indicating that the operation is to be stopped is controlled by the control of the programmable logic controller (9). 6), after that, the supply of electric power to the electric motor (1) is interrupted, and the operation of the conveyor device is stopped.

When the current monitoring data X exceeds the first load reference value I1 in the process of increasing the load, the announcement representing the low level warning (safety class 1) is made by the control of the programmable logic controller (5). 6).
Thereafter, when the current monitoring data X exceeds the second load reference value I2, an announcement representing a high level warning (safety class 2) is output from the speaker (6) under the control of the programmable logic controller (5). The

  In the programmable logic controller (5), voice announcement information (voice data) corresponding to the safety class is registered for each of the safety classes 1, 2 and 3 as illustrated in FIG.

FIG. 3 shows the control executed by the programmable logic controller (5).
When the conveyor device is activated, current monitoring is first started in step S1, and current monitoring data X is read in step S2.
Subsequently, in step S3, it is determined whether or not the current monitoring data X is greater than or equal to the first load reference value I1, and if it is determined no, the process proceeds to step S9, and the conveyor device is stopped by the operation of the operator. It is determined whether or not a command has been issued.

  When it is determined NO in step S9, the process returns to step S2 and the reading of the current monitoring data X is repeated. If it is determined YES in step S9, the conveyor device is normally stopped.

  When the current monitoring data X is equal to or greater than the first load reference value I1 and it is determined YES in step S3, the process proceeds to step S4, and whether or not the current monitoring data X is equal to or greater than the second load reference value I2. Is judged. Here, when it is determined NO, the process proceeds to step S7, the safety class 1 is announced, and then the process proceeds to step S9.

  Thereafter, when the current monitoring data X becomes equal to or greater than the second load reference value I2 and it is determined YES in step S4, the process proceeds to step S5, and it is determined whether or not the current monitoring data X is equal to or greater than the threshold value I3. Is done. Here, when it is determined NO, the process proceeds to step S8, the safety class 2 is announced, and then the process proceeds to step S9.

  Thereafter, when the current monitoring data X is equal to or greater than the threshold value I3 and it is determined YES in step S5, the process proceeds to step S6, and after the safety class 3 announcement is made, the conveyor device is emergency stopped.

  According to the conveyor device of the present invention described above, in the process in which the current monitoring data X increases due to an increase in load, the current monitoring data X first exceeds the first load reference value I1 before reaching the threshold value I3. As a result, a safety class 1 announcement is made. In response to this, an interval for many passengers to get on the conveyor device is provided.

  Thereafter, when the load further increases and the current monitoring data X exceeds the second load reference value I2, a safety class 2 announcement is made. Correspondingly, more passengers get into the conveyor device.

  As described above, in the process of increasing the load, a safety class announcement according to the magnitude of the load is made, so that a plurality of passengers gradually get an interval to get on the conveyor device. The increase in the load on is suppressed.

  As a result, the load further increases, and when the current monitoring data X exceeds the threshold value I3, the operation of the conveyor device is stopped urgently, and the drive system equipment is damaged and the passengers are safe.

  Therefore, according to the conveyor device of the present invention, the frequency at which the operation is stopped due to an increase in load is reduced, and a reduction in the operation rate due to the emergency stop is suppressed.

  In addition, each part structure of this invention is not restricted to the said embodiment, A various deformation | transformation is possible within the technical scope as described in a claim. For example, the present invention can also be applied to a conveyor device that controls the electric motor (1) by the inverter (7) as shown in FIG. 2, and in this case, the current value output terminal ( The current monitoring data obtained from 71) is supplied to the programmable logic controller (5).

Instead of the current monitoring data, it is also possible to monitor the increase in load by the value of the electric power supplied to the electric motor (1).
The load reference value to be compared with the current monitoring data may be a plurality of three or more.

The announcement to the passenger can increase the volume as the level of warning increases. As a result, the actions of passengers can be urged effectively.
It is also possible to issue a warning sound such as a buzzer sound together with an announcement for the passenger. As a result, notification to foreigners becomes effective.
Furthermore, the notification to the passenger is not limited to voice but can be performed by video.

(1) Electric motor
(2) Power supply
(3) Current sensor
(4) A / D converter
(5) Programmable logic controller
(6) Speaker
(7) Inverter
(8) Control device

Claims (4)

A conveyor device comprising load detection means for detecting the magnitude of a load during operation, and emergency stop means for emergency stop when the magnitude of the load detected by the load detection means exceeds a predetermined threshold In
Information storage means for storing a plurality of load reference values that are smaller than the predetermined threshold and different in size, and a plurality of warning information that indicates a higher level warning as the load reference value is larger for each load reference value When,
When the magnitude of the load detected by the load detection means exceeds any load reference value, warning information corresponding to the magnitude of the load reference value is acquired from the information storage means, and the acquired warning information is A conveyer device comprising an informing means for outputting audio and / or video.   The conveyor device according to claim 1, wherein the load detection unit is configured by a current sensor interposed between a power source and an electric motor.   The conveyor device according to claim 1, wherein the load detection means is configured by a current value output terminal of an inverter interposed between a power source and an electric motor.   The conveyor apparatus according to any one of claims 1 to 3, wherein the warning information includes information for suppressing a passenger number.

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