JPH02239091A - Control device for passenger conveyor - Google Patents

Abstract

PURPOSE:To improve safety by controlling a starting characteristic and a braking characteristic at the time of starting/stopping a passenger conveyor composed of an escalator or a moving corridor. CONSTITUTION:In a motor control circuit, a main control circuit 15 generates information indicating the difference among starting, stoppage, or constant speed operation and the difference between a lifting operation or a lowering operation. Such information is inputted into a speed command device 17 to generate a speed command in accordance with the contents of the information. The speed command is compared to an actual speed detected by a detector 20 by a speed control computing element 18 to generate a current reference for making the resultant speed deviation zero, which is sent out to a current control computing element 19. As an escalator load which is detected by a load detector 22 is inputted, the current control computing element 19 corrects the current reference of the speed control computing element 18 so as to make the speed change ratio at the time of starting and stopping a driving motor 10 nearly constant in accordance with the output of the load detector and the information on the operating direction obtained from the main control circuit 15.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the invention] (Industrial field of application) The present invention relates to a control device for a passenger conveyor, and more particularly to a control device for controlling a passenger conveyor consisting of an escalator or a moving walkway. The present invention relates to a 3A control device for a passenger conveyor that calculates a current standard for matching the speed standard and sub-controls the current of the drive motor in accordance with the current standard.

(Prior Art) Conventionally, escalators and moving walkways (moving walkways) are generally driven by three-phase induction motors with electromagnetic brakes.
The electric motor itself is configured to receive fixed frequency AC power from a commercial power source via a switch. That is, when a passenger conveyor such as an escalator is started, the switch is turned on and the electromagnetic brake is released, and when the passenger conveyor is stopped, the switch is turned off and the electromagnetic brake is applied.

(Problem to be Solved by the Invention) In such a passenger conveyor, when starting the drive motor, the drive motor starts up according to its torque vs. speed characteristic.
The speed increases until the speed point where the motor output torque and load torque are balanced. The time required to rise to this speed point varies somewhat depending on the motor starting method, but basically it depends on the load torque when there are no or only a few passengers onboard the escalator. When the load torque is small, it becomes short, and conversely, when the load torque is large, it becomes long. In this way, the starting time of the motor varies depending on the load condition. Additionally, starting the vehicle with a passenger on board poses a safety problem, and generally it has been possible to start the vehicle only when no passenger is on board. Furthermore, on escalator evenings and inclined moving walkways,
If an attempt is made to start the vehicle with a passenger on board, the load torque acting in the downward direction may cause the vehicle to descend before the brakes open and the electric motor starts.

When such a passenger conveyor is stopped, a stop switch or a safety switch is used to stop power supply to the electric motor, and at the same time, an electromagnetic brake is activated to stop the electric motor. If the safety switch is activated, there is a passenger on the S-force rake or moving walkway, and the driving direction is either up or down. In such a situation, if the electric power supply to the electric motor is reduced by +1 and braking is applied by the electromagnetic brake, the braking force of the electromagnetic brake is generally constant, so the braking distance will vary depending on the load amount depending on the number of passengers and the driving direction. Alternatively, braking characteristics such as deceleration and deceleration time were different. In order to keep such braking characteristics as constant as possible, methods have been devised in which the braking force of the electromagnetic brake is divided into two stages, but this is not a drastic measure.

Therefore, it is an object of the present invention to provide a control device for a passenger conveyor that can minimize variations in characteristics during startup and stop, thereby making the passenger conveyor safer.

[Structure of the invention]

(Means for Solving the Three Points) In order to achieve the above objectives, the passenger conveyor control device of the present invention supplies driving power from a power converter to a main drive motor that drives a passenger conveyor consisting of an escalator or a moving walkway. A speed control means that constitutes a main circuit for supplying electricity and calculates a current reference for finalizing the actual speed of the drive motor according to a predetermined running pattern, and a load detection means that detects the stacking load of the passenger conveyor. A current control means for controlling the current of the drive motor according to the current reference and the loaded load is provided, and the current reference is set such that the acceleration/deceleration speed and acceleration/deceleration distance of the passenger conveyor are approximately constant regardless of the driving direction of the passenger conveyor or the loaded load. is characterized in that it is corrected by the output of the load detection means.

(Function) According to the above configuration, when starting and stopping the passenger conveyor, the acceleration/deceleration of the drive motor is controlled so that it always has an appropriate acceleration/deceleration speed and acceleration/deceleration distance, regardless of the loaded load or the driving direction. As a result, the passenger was S! Passengers can always get on and off the conveyor under the same conditions regardless of the loaded load or driving direction, making it a safe passenger conveyor.

(Examples) Hereinafter, the present invention will be explained in detail based on Examples. In the following embodiments, an escalator will be used as an example of the passenger conveyor.

FIG. 1 shows an embodiment of the present invention.

In FIG. 1, the drive motor driving the passenger conveyor is designated 10. The drive motor 10 is, for example, a Sanwa induction motor, and is supplied with $1 controlled AC power from an AC power supply connected to terminals R, S, and T via a power converter 11. The power converter 11 includes a converter 12 that performs AC/DC conversion, a shunt capacitor 13, and an inverter 14 that performs inverse conversion. The inverter 14 outputs alternating current power of variable voltage and variable frequency, thereby controlling the speed of the drive motor. The inverter 14 is controlled by a main control circuit 15 and a speed control device 16.
It is done through. The main control circuit 15 includes a single stage signal circuit f for switching the operating direction of the passenger conveyor, making an emergency stop, etc., and transmits its output signal to the speed control device 16.
Send to. The speed control device 16 receives an actual speed signal of the drive motor 10 from a speed detector 20, and also receives an actual speed signal from a current detector 21.
The current signal of the drive motor 10 is further transmitted to the load detector 2.
From 2 onwards, the escalator's loading load number ID is manually applied. The speed control i2llll device 16 is a speed control device iif
l7, speed Ruri 8 calculator 18 and current Ruri control calculator 1
Contains one. The speed command device 17 is connected to the main control circuit 15
The speed standard is generated by referring to various signals input manually from the system. The speed control calculator 18 compares the actual speed detected by the speed detector 20 with the speed reference from the speed command device 17, and outputs a current reference for making the deviation, that is, the speed deviation, zero. The current control calculator 19 compares the actual RFI current detected by the current detector 21 with the current reference from the speed control calculator 18, and controls the ignition of the inverter 14 so that the deviation, that is, the current deviation, becomes zero. Take control. Here, the output of the load detector 22 is based on the current reference from the speed control calculator 18 so that the acceleration/deceleration speed and acceleration/deceleration distance of the S-force rake are approximately constant regardless of the driving direction of the escalator or the loaded load. Used to add corrections.

When the drive motor 10 is stopped, braking by an electromagnetic brake (not shown) is also used.

FIG. 2 is an internal side view of the main part of the escalator shown for explaining the mounting structure of the load detector 22. FIG. The figure shows the top of the escalator.

The steps 30, side cover 31, and upper entrance/exit floor plate 32 are exposed to the outside. Each step 30 is connected to a chain 34 driven by a drive wheel 33. Drive wheel 33
Attach the drive shaft mounting bracket 36 to the escalator frame 35.
The drive shaft 37 is rotatably attached to the drive shaft 37 via the drive shaft 37. The drive wheel 33 is driven by the drive motor 10 to reduce the speed of the drive wheel 33.
8 and a drive chain 39. The drive motor 10 is provided with an electromagnetic brake 40 .

A power converter 11 that drives and controls the drive motor 10 is housed in a control panel 41 . Other electric circuit components are also housed within the control panel 4l.

FIG. 3 is an enlarged view of the main part of FIG. 2. Load detector 22
a. , 22b (corresponding to the load detector 22 in FIGS. 1 and 2) are provided between the escalator frame 35 and the drive shaft mounting bracket 36. 42 is a lead wire of the load detectors 22a, 22b. Load detector 22
a. As 22b, for example, a load cell configured using a strain gauge can be used.

The Cj weight applied to the escalator acts on the drive shaft mounting bracket 36 via the step chain 34 as a component force of the load in the direction a along the slope of the escalator, and as a result, the escalator load is detected by the load detectors 22a and 22b. can do.

On the other hand, in the motor control circuit (Fig. 1), the main control circuit 15
It emits information indicating whether it is starting, stopping, constant speed operation, and whether it is upward or downward operation. This information is manually input to the speed command device 17, which generates a speed command according to the content of the information. This speed command and the actual speed detected by the speed detector 20 are compared in the speed control calculator 18,
A current reference for making the resulting speed deviation zero is generated and sent to the current control calculator 19. As already mentioned, the current control calculator 19 basically operates the inverter 14 so that the actual current value detected by the current detector 21 matches the current reference manually input from the speed '3A performance device 18. The escalator load detected by the load detector 22 is manually applied to control the output of the load detector and the main control circuit 1.
The current from the speed control calculator 18 is adjusted so that the speed change rate, that is, the acceleration/deceleration, and the starting and stopping distance, that is, the acceleration/deceleration distance, are approximately constant when the electric drive ram 10 starts and stops in accordance with the information regarding the driving direction obtained from the driving direction. Amendments are made to the standards.

As a result of controlling as described above, the escalator can always obtain a constant starting time and starting acceleration even when starting, regardless of the amount of negative direction or the driving direction. Similarly, even when the escalator is stopped, a constant stop time and stop deceleration can always be obtained regardless of the load amount or driving direction. Therefore, regardless of the amount of passenger load, it is possible to always provide a constant start/stop time and constant acceleration/deceleration within a safe range. Therefore, for example, after the escalator has stopped due to activation of a safety device, if the factor that activated the safety device no longer exists, the escalator can be activated again with passengers still on board. Furthermore, when stopping, especially when the safety device is activated, there are passengers on the S-force rake, and the braking distance differs depending on the number of passengers and the driving direction, but according to the above embodiment, the electromagnetic brake The drive motor 10 itself stops while performing an acclimatization operation before the brake 40 is activated, and then the electromagnetic brake 40 is activated to stop the escalator. As a result, constant braking distance and deceleration can always be obtained regardless of the driving direction or passenger load.

The load detectors 22 or 22a, 22b are installed in the third
The structure is not limited to that shown in the figure. Instead of the load detector mentioned above, a passenger detector is installed at the entrance of the escalator or moving walkway, and the difference between the amount of passengers detected at the entrance and the amount of passengers detected at the exit is multiplied by the standard weight per person. The amount of load, that is, the live load may be estimated by doing so. In that case, the present invention can be applied to horizontal moving walkways other than S-force lakes and inclined moving walkways. An example is shown in FIG.

In the S-Riki Lake shown in FIG. 4, a photo-lightning type passenger sensor 44 is installed at the boarding gate 43 (boarding day and exit gate) to count the number of passengers at the boarding gate and the number of passengers at the exit. Based on this count result, i! The loaded load (J weight) may be used instead of the detection result of the load detector 22.

Further, as shown in FIG. 5, the entrance floor plate 3 of the entrance 43
2, a load detector 45a. 4.5b may be provided in an embedded manner, and the wi load may be detected each time from the difference between the excess load of the boarding passengers and the combined load of the passengers who have disembarked.

〔Effect of the invention〕

As described above, according to the present invention, the passenger conveyor control device controls the starting characteristics and braking characteristics when starting and stopping the passenger conveyor consisting of an S-force rake or a moving walkway, thereby further improving safety. can be offered.

4. Figure 1 is a block diagram showing one embodiment of the present invention, Figure 2 is an internal side view showing the main parts of an escalator to which the present invention is applied, and Figure 3 is the same as that shown in Figure 2. FIGS. 4 and 5 are enlarged views of the main parts, and side views of the main parts showing different mounting examples of the load detector.

10... Drive motor, 11... Power converter, 15.
・・Main i1 control circuit, 16・・Motor control circuit, 17・
...Speed command device, 18...Speed control calculator, 19.
...Current control calculator, 20...Speed detector, 21...
- Current detector, 22, 22a. 22b, 45a. 45b
-/Jtl detector, 30... Steps, 32... Entrance/exit floor plate, 33... Drive wheel, 35... S force rake frame, 36... Drive wheel mounting bracket, 37... Drive Axis, 40... Electromagnetic brake, 43... Entrance/exit, 44.
...Photoelectric sensor.

Claims (1)

[Claims] It constitutes a main circuit that supplies drive power from a power converter to a drive motor that drives a passenger conveyor consisting of an escalator or a moving walkway, and also provides a current reference for controlling the actual speed of the drive motor according to a predetermined running pattern. a speed control means for calculating, a load detection means for detecting the load of the passenger conveyor, and a current control means for controlling the current of the drive motor according to the current reference and the load; A control device for a passenger conveyor, characterized in that the current reference is corrected by the output of the load detection means so that the acceleration/deceleration speed and acceleration/deceleration distance of the passenger conveyor are substantially constant regardless of the loaded load.