JPH08231173A - Man conveyor controller - Google Patents

Abstract

PURPOSE: To enable an operator to measure the stop braking distance of a man-conveyor accurately as reducing the labor of the operator. CONSTITUTION: A safety circuit 16 detects a stop command of a man-conveyor to be imparted from the outside, and if a speed of revolution in an electric motor 11 for driving a footstep is lowered by this stop control, a control circuit 18 performs a stop judgment at a time when revolution to be detected by a sped detector 14 has become lower than the specified set value. Accordingly, this control circuit 18 calculates a braking distance ranging from a point of stop command detecting time to a point of stop judging time on the basis of a speed signal. This calculated result is displayed by a stop braking distance display part 25. In addition, the control circuit 18 judges whether the stop braking distance is within the tolerance being preset or not, and then a proper judging result of the stop braking distance is displayed by a proper judgment display part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a man conveyor control device for escalators, moving walks and the like.

[0002]

2. Description of the Related Art Escalators and moving walks are known as passenger conveyors for carrying people on endless steps that are continuously moving. Particularly, the escalator is a circuit as shown in FIGS. 8 and 9. It is a composition. That is, an induction motor (IM) 1 for driving the escalator, which is housed on the upper floor of the escalator, a three-phase AC power supply 2 for supplying electric power to the induction motor 1, an overcurrent breaker 3 for circuit protection, Ascending operation electromagnetic contactor 4U provided for switching the phase sequence of the three-phase power supplied from the power source 2 through the overcurrent breaker 3 to rotate the induction motor 1 in the forward direction and the reverse direction,
The electromagnetic contactor 4D for descending operation is used, and when the ascending operation is performed, the induction motor 1 is driven in the forward direction by turning on the electromagnetic contactor 4U for ascending operation. By turning on the electromagnetic contactor 4D for driving, the induction motor 1 is driven in reverse, and the step is moved in the ascending direction and the descending direction.

Further, as shown in FIG. 9, in the electromagnetic brake circuit of the escalator, the ascending operation command is issued by the ascending operation switch 5
When U is input, or when the descending operation command is entered by closing the descending operation switch 5D, a current flows through the electromagnetic coil 7 and becomes an electromagnet, which comes into pressure contact with the pulley of the induction motor 1 to prevent its rotation. When the brake shoe (not shown) that had been used is released, and conversely, the ascending operation switch 5U or the descending operation switch 5D is turned off, no current flows in the electromagnetic coil 6 after the discharge of the capacitor 7 is completed, and the electromagnet force is reduced. In this configuration, the rotation of the induction motor 1 is stopped by bringing the brake shoe into pressure contact with the pulley of the induction motor 1 as before.

By the way, when using the escalator, the user moves to the upper floor or the lower floor with his / her body stabilized by being held by the handrail belt which moves in synchronization with the step. Generally, the speed of movement of the escalator is 30 m / min, and if it suddenly stops during traveling, the shock will be great even if it is caught by the handrail belt, and the body will lean forward. Therefore, if a sudden stop occurs especially during the descent operation, the user may fall forward. Therefore, in order to prevent such an accident, the stop braking distance S of the escalator is set to 0.1 m ≦ by the JIS standard. It is set to fall within the range of S ≦ 0.6 m (1), and the stop braking performance of the escalator is designed accordingly.

When verifying the braking performance of the manufactured actual machine, the safety circuit is operated when a step synchronized with the induction motor has passed a certain position, and the series of stop braking operations described above is performed. The induction motor stopped,
Brake performance is evaluated by measuring the distance traveled until the step stops.

[0006]

However, in such a conventional brake performance evaluation method, an operator observes a place where a step which is in the middle of movement of the step passes a predetermined fixed position, and a safety circuit is established. Since I am trying to operate it,
Some workers may have slight variations in the stop braking distance measurement results, and it is necessary to repeat the same test work many times and take the average in order to perform accurate brake performance evaluation. There was a problem that it took time and effort.

The present invention has been made in view of the above conventional problems, and provides a man conveyor control device capable of accurately detecting the stop braking distance in a short time while reducing the burden on the operator. The purpose is to provide.

[0008]

According to a first aspect of the present invention, there is provided a man conveyor control device, an electric motor for driving a step, a speed detector for detecting a rotational speed of the electric motor, and a stop of the man conveyor provided from the outside. A stop command detection unit that detects a command, a stop determination unit that determines a stop when the rotation speed detected by the speed detector becomes lower than a preset value, and a stop determination signal from the stop determination unit A stop braking distance calculation unit that calculates a braking distance from the time when the stop command is detected by the detection unit to the time when the stop determination signal is received based on the speed signal of the speed detector.

According to a second aspect of the present invention, there is provided a passenger conveyor control device, an electric motor for driving a step, a handrail driven by the electric motor in synchronization with the step, and a handrail speed detector for detecting a driving speed of the handrail. A stop command detection unit that detects a stop command of the passenger conveyor given from the outside, a stop determination unit that determines stop when the drive speed detected by the handrail speed detector becomes lower than a predetermined set value, and a stop determination unit In response to the stop determination signal, a handrail braking distance calculation unit that calculates the handrail braking distance from the stop command detection time of the stop command detection unit to the reception time of the stop determination signal based on the speed signal of the handrail speed detector, And a stop braking distance calculation unit that calculates the stop braking distance of the electric motor based on the handrail braking distance calculation unit.

According to a third aspect of the present invention, the passenger conveyor control device according to the first or second aspect further comprises a stop braking distance display section for displaying the stop braking distance calculated by the stop braking distance calculating section. is there.

According to a fourth aspect of the present invention, in the passenger conveyor control device according to any of the first to third aspects of the present invention, the stop braking distance calculated by the stop braking distance calculating section falls within a preset allowable range. According to whether or not the stop braking distance is normal or abnormal, a stop braking distance appropriateness determination unit and a display unit that displays a determination result of the stop braking distance appropriateness determination unit are provided.

According to a fifth aspect of the present invention, in the passenger conveyor control device according to any one of the first to fourth aspects, a memory for storing a history of the stop braking distance calculated by the stop braking distance calculating section is provided.

[0013]

According to the passenger conveyor control device of the invention of claim 1,
If the stop command detection unit detects an externally supplied stop command for the conveyor and the rotation speed of the electric motor for driving the step decreases due to the stop control, the stop determination unit determines that the rotation speed detected by the speed detector is a predetermined value. When it becomes lower than the set value, stop judgment is performed. Therefore, when the stop braking distance calculation unit receives the stop determination signal from the stop determination unit, the stop braking distance calculation unit determines the braking distance from the stop command detection time of the stop command detection unit to the reception time of the stop determination signal based on the speed signal of the speed detector. To calculate.

In the man conveyor control device according to the second aspect of the present invention, the stop command detector detects an externally supplied stop command for the man conveyor, and the stop control reduces the rotation speed of the electric motor for driving the step, If the moving speed of the handrail synchronized with is also reduced, the stop determination unit makes a stop determination when the moving speed detected by the handrail speed detector becomes lower than a predetermined set value. Therefore, when the handrail braking distance calculation unit receives the stop determination signal from the stop determination unit, the handrail braking distance from the time when the stop command is detected by the stop command detection unit to the time when the stop determination signal is received is the speed signal of the handrail speed detector. Further, the stop braking distance calculation unit calculates the stop braking distance of the electric motor based on the handrail braking distance calculated by the handrail braking distance calculation unit.

According to a third aspect of the present invention, there is provided the stop control distance display section for displaying the stop braking distance calculated by the stop stop distance calculation section.

According to a fourth aspect of the present invention, there is provided a passenger conveyor control device according to any one of the first to third aspects of the present invention, in which the stop braking distance calculated by the stop braking distance calculation unit is preset. The stop braking distance appropriateness determination unit determines whether the stop braking distance is normal or abnormal depending on whether or not it is within the range, and displays the determination result of the stop braking distance appropriateness determination unit on the display unit.

According to the fifth aspect of the present invention, there is provided a man conveyor control device according to any one of the first to fourth aspects, wherein the stop braking distance history calculated by the stop braking distance calculating section is stored in a memory. By later reading the data in the memory, not only the stop braking distance evaluation test but also the stop braking distance of the passenger conveyor during an emergency stop that occurs during normal operation can be evaluated.

[0018]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows the configuration of a common embodiment of the inventions of claims 1 and 3 to 5. The escalator A as one of the man conveyors drives a step (not shown) by forward and reverse rotation drive of an induction motor (IM) 11 installed in a machine room on the upper floor thereof, and the step The handrail belt 12 is driven in synchronization with the driving. The induction motor 11 is driven by the circuit shown in FIG.
The brake circuit 13 is configured by the circuit shown in FIG. 9, and turns on the ascending operation switch 5U when the ascending operation command signal is given to the operation / stop instruction signal 12a, or descends when the descending operation command signal is given. The switch 5D is turned on to release the brake shoes for the induction motor 11, and conversely, when the stop command is given to the operation / stop command signal 12a, both the up and down operation switches 5U and 5D are turned off, and the induction motor 11 is turned on. On the other hand, the brake shoe is brought into pressure contact to apply braking.

The passenger conveyor control system of this embodiment is composed of a speed detector 14, a safety circuit 16, an operation circuit 17, and a control circuit 1.
8 and a stop braking distance appropriateness determination display section 24 and a stop braking distance display section 25.

The speed detector 14 detects the speed of the induction motor 11 by inputting the pulse signal 14a from the pulse generator 15 which outputs a pulse signal in accordance with the rotation of the induction motor 11. The safety circuit 16 gives a stop command signal 13a to the brake circuit 13 when an emergency occurs. Driving circuit 17
Outputs a run / stop command signal 13a to the induction motor 11 by an operation of a staff member.

The control circuit 18 controls the speed signal 14b from the speed detector 14, the emergency stop command 16b from the safety circuit 16,
A data input unit (DI) 19 for taking in the driving / stopping 17b from the driving circuit 17 and a PR in which a calculation processing procedure is registered.
The OM 20 and the CPU 2 that executes the stop braking distance separation calculation in accordance with the calculation processing procedure registered in the PROM 20.
1 and data necessary for the arithmetic processing of the CPU 21 and the CPU 2
A memory 22 for storing the result of the calculation executed by the CPU 1;
The data output unit 23 outputs the calculation processing result of 21. The stop braking distance adequacy determination result 24a output from the data output unit 23 of the control circuit 18 is displayed on the adequacy determination display unit 24, and the stop braking distance data 25a is displayed on the stop braking distance display unit 25. There is.

In the passenger conveyor control device having the above-described structure, the operation circuit 17 is operated by a staff member to operate the induction motor 1.
1, the stop command signal 13a is output, the safety circuit 16 outputs the stop command signal 13a for stopping the induction motor 11 in an emergency, and the stop command signal 13a of the driving circuit 17 or the stop of the safety circuit 16 is output. The brake circuit 13 operates by the command signal 13a, and the rotation of the induction motor 11 is quickly stopped.

The speed detector 14 receives the pulse signal 14a output from the pulse generator 15 by the rotation of the induction motor 11 and detects the speed.

The speed signal 14b from the speed detector 14, the stop command signal 16b from the safety circuit 16 and the operation / stop command signal 17b from the operation circuit 17 are also input to the data input section 19 of the control circuit 18, and the CPU 21 controls them. Necessary information is read from the PROM 20 in which the arithmetic processing procedure is registered and the memory 22 in which the data necessary for the arithmetic processing procedure is stored, and predetermined arithmetic processing is executed to calculate the stop braking distance of the induction motor. The result is stored in the memory 22, the stop braking distance appropriateness determination result 24a is output and displayed on the adequacy determination display unit 24 through the data input unit 23, and the stop braking distance data 2 is displayed on the stop braking distance display unit 25.
5a is output and displayed.

The structure of the arithmetic processing function executed by the control circuit 18 will be described with reference to FIG. 2. The speed input section 18a for inputting the speed signal 14b from the speed detector 14 and the stop command 16b from the safety circuit 16 are input. Stop command input section 1
8b, a driving command input unit 18c for inputting a driving command 17b from the driving circuit 17 as an input unit, a comparison unit 18d that compares the current speed with a predetermined stop speed, a calculation unit 18e that executes various calculations, and a calculation unit 18e. The storage unit 18f stores the calculation result of 1., the stop time timer 18g that measures the time from the stop command issuance to the actual stop, and the display output unit 18h that displays and outputs the calculation result of the calculation unit 18e.

Therefore, the operation command 17 from the operation circuit 17
When b is input from the operation command input unit 18c, the rotation speed signal 14b of the induction motor 11 is continuously input from the speed input unit 18a. When the safety circuit 16 makes an emergency stop for some reason while the escalator is in operation and the stop command signal 16b is detected by the stop command detector 18b, the stop time timer 18g starts time measurement.

The speed signal continuously input from the speed input unit 18a is compared with a reference value for judging stop in the comparing unit 18d, and if the value is below the reference value, the comparing unit 18d sends a stop command to the stop time timer 18g. The stop time timer 18g gives the arithmetic unit 18e the measurement result of the stop braking required time from the time when the stop command is input from the safety circuit 16 to the stop determination time.

The computing unit 18e calculates the stop braking distance by integrating the speed command continuously input from the speed input unit 18a over the required stop braking time, saves this in the storage unit 18f, and displays it. The stop braking distance data 25a is output from the output unit 18h and displayed on the stop braking distance display unit 25.

Further, the calculation unit 18e compares the calculated stop braking distance S with the above inequality (1), and this equation (1)
Is determined to be normal, and if it is out of the range, abnormality is determined and the determination result 24a is displayed on the display output unit 18h.
Is output to the appropriateness determination display unit 24 through the display to display the appropriateness of the stop braking distance.

The detailed processing operation of the above control circuit is shown in FIG.
And it demonstrates based on the flowchart of FIG. First, the value of the condition data (CNDDAT) is determined (step S1).

Initially, CNDDAT = 0, so it is determined whether or not a stop command is detected (step S
2). If the stop command is not detected, the process is directly terminated and the stop command detection determination is performed again. On the other hand, if the stop command is detected, the current speed is read (step S3),
After resetting the stop time timer 18g, start the timer and start measuring the stop braking time.
To 1 to exit the process (steps S4, S
5).

In the next loop, since CNDDAT is set to 1, the speed is read from the speed detector 14 (steps S1 and S6) and the speed is compared with the stop reference value (step S7).

If the current speed is still higher than the stop reference value in this comparison, the process is left as it is, and the speed reading and the stop reference value are compared.

Induction motor 11 during the repetition of several times
If the current speed stops and the current speed falls below the stop reference speed, it is determined that the induction motor is stopped (step S7),
The stop braking distance S is obtained by time-integrating the speed data repeatedly input by the value of the stop time timer 18g.
Is calculated (step S8) and the stop braking distance S is stored in the storage unit 1.
It is set to 8f (step S9). And CNDDA
The value T is set to 2, the stop braking distance display unit 25 is caused to display, and the processing is terminated (steps S10 and S11).

In the next loop, since 2 is set in CNDDAT, it is judged whether or not there is a driving command signal (steps S1 and S12), and if the driving command is not issued, the process ends. However, if the measurement of the stop braking distance is completed and the operation command is input for restarting, C
NDDAT is set to 0 (step S13), the stop braking distance obtained up to that point is reset, and the process exits (step S14).

Next, for the calculation result of the stop braking distance,
The appropriateness determination is executed based on the flowchart of FIG. First, it is determined whether or not the stop braking distance S is set (step S21), and if not set, the display of the appropriateness determination display section 24 is erased (step S2).
2). On the other hand, if the stop control distance S is set, it is determined whether or not the stop braking distance S is within the reference range as shown in the above equation (1) (step S23).

In this determination step, if it is within the reference range, the appropriateness determination display section 24 displays normal (step S24), and if it is out of the reference range, it displays abnormal (step S25).

As a result, the worker operates the safety circuit to make an emergency stop when the step reaches a specific place on the escalator as in the conventional case, and the stop braking is actually applied until the step stops. It is possible to recognize the stop braking distance at the time of the emergency stop of the escalator by looking at the display of the stop braking distance display section 25, by simply activating the safety circuit without performing the work of actually measuring the distance. It is also possible to recognize the suitability by looking at the judgment display of the suitability display unit 24.

In the first embodiment, the calculation result of the stop braking distance and the appropriateness judgment result are displayed, and the calculation result is stored. However, as an embodiment of the invention of claim 1, Can be configured so that only the stop braking distance is calculated, and how the data of the calculation result is used can be left to the intention of the user.

Further, as a common embodiment of the inventions of claims 1 and 3, in the first embodiment described above, only the calculation result of the stop braking distance is displayed without displaying the judgment result of suitability. Can be Further, as a common embodiment of the inventions of claims 1 and 4,
In the first embodiment described above, only the judgment result of suitability of the stop braking distance may be displayed, and the stop braking distance data itself may not be displayed. Further, as a common embodiment of the inventions of claim 1, claim 3, and claim 4, the history of the stop braking distance is not stored, and the measurement result of the stop braking distance and its suitability are obtained only during the stop braking distance evaluation work. It is possible to have a configuration in which the determination result of is displayed.

Next, one embodiment of the inventions of claims 2 to 5 will be described with reference to FIGS. 5 and 6. The feature of this second embodiment is that the moving speed of the handrail belt 12 is most stable in the pulse generator 15 'that rotates in synchronization with the rotation of the handrail belt 12 of the escalator and outputs a pulse signal as shown in FIG. The pulse signal 14a of this pulse generator 15 'is input to the counter 14'
The counter 14 'counts the pulse signal 14'a and inputs the count value 14'b to the data input section 19 of the control circuit 18.

As shown in FIG. 6, the functional structure of the control circuit 18 is almost the same as that of the first embodiment shown in FIG. 2, but the pulse count data 14'b proportional to the handrail belt speed is used. A pulse count input section 18j for inputting is provided in place of the speed input section 18a, and the calculation section 18 is also provided.
A change has been made to the arithmetic processing procedure executed by e.

The operation of the second embodiment will be explained. The operation command 17a is sent from the operation circuit 17 to the induction motor 11
And the operation is started. When the induction motor 11 is driven, a step (not shown) starts to move, and in synchronization with this, the handrail belt 12 also starts to move.

When the handrail belt 12 moves, the pulse generator 15 'causes the pulse signal 14'a proportional to its moving speed.
Is input to the counter 14 ', pulse counting is performed here, and the pulse count value is always input to the pulse count input unit 18j of the control circuit 18.

When the stop command 13a is given from the safety circuit 16 to the brake circuit 13 and the brake circuit 13 operates, the induction motor 11 is brought to an emergency stop and stopped for a certain stop braking distance. The handrail belt 12 that has been moving along with it will also stop.

When the safety circuit 16 outputs the stop command 13a, the stop command 16b is input to the stop command detector 18b of the control circuit 18, and the stop command detector 18b detects an emergency stop. When this emergency stop is detected, the calculation unit 18e reads out the pulse count value input to the pulse count input unit 18j at the time of occurrence and stores it in the storage unit 18f, and then the pulse count value of the pulse count input unit 18j is stored. If the pulse count value does not increase by monitoring, it is determined that the emergency stop is completed, the pulse count value at that time is read, and the pulse count value at the time of the stop command generation stored in the storage unit 18f is read and the difference between them is read. Is calculated, and the stop braking distance corresponding to the pulse count number of the difference is calculated. This is because the pulse generator 15 ′ outputs one pulse each time the handrail belt 12 moves a certain distance, and therefore the belt stop braking distance can be easily obtained by multiplying the pulse count number by the moving distance per pulse. is there.

The calculation unit 18e further calculates the stop braking distance of the induction motor 11 from the calculated belt stop braking distance, stores it in the storage unit 18f, and stores it in the display output unit 18h. Output to and display.

The calculating unit 18e further compares the obtained stop braking distance S of the induction motor 11 with the range defined by the above-mentioned equation (1). If the range is within the range, the stop braking distance is normal. If it is outside, it is determined to be abnormal, and the determination result is output to the adequacy determination display unit 24 through the display output unit 18h,
Displays the appropriateness of the stop braking distance.

Next, detailed processing operation of the second embodiment will be described with reference to the flow charts of FIGS. 7 and 4. First, the value of the condition data (CNDDAT) is determined (step S31).

At first, CNDDAT = 0, so it is judged whether or not a stop command is detected (step S3).
2). If the stop command is not detected, the process is directly terminated and the stop command detection determination is performed again. On the other hand, if the stop command is detected, the current pulse count value of the counter 14 'is read and stored (step S33), and CNDDAT is set.
Is set to 1, and the process exits (step S34).

In the next loop, since CNDDAT is set to 1, the pulse count value at this time is read from the counter 14 'and stored (step S31,
S35, S36). Then, the difference from the stored pulse count value one cycle before is calculated (step S3
7) The difference is compared with the stop determination reference value (step S38). It is desirable to set the stop determination reference value to a pulse count value when 10% or less of the rated speed is taken into consideration in consideration of shaking of the handrail belt 12. This step S3
If the difference is larger than the stop determination reference value in the comparison of No. 8, it is determined that the handrail belt 12 is not stopped, and the process is skipped, and the repeated pulse count value is read, the difference is calculated, and the stop determination reference value. Perform a comparison with.

If the difference between the read pulse count value and the previous pulse count value becomes less than the stop determination reference value during the number of repetitions, it is determined that the handrail belt 12 has stopped (step S31). , S35 to S3
8). Then, the difference between the pulse count value stored in the storage unit 18f at the time of detecting the stop command and the pulse count value at the time of the current stop determination is calculated (step S39), and the stop braking distance of the handrail belt 12 is calculated from this difference. Further, since the handrail belt 12 tends to stretch over time, it is converted to the actual stop braking distance S of the induction motor 11 by applying a predetermined coefficient, and the result is set in the storage unit 18f (steps S40 and S41). ). And CNDD
The AT is set to 2, the stop braking distance display section 25 is caused to display, and the processing is exited (steps S42 and S43).

In the next loop, since 2 is set in CNDDAT, it is judged whether or not there is a driving command signal (steps S31, S44), and if the driving command has not been issued, the process ends. However, if the measurement of the stop braking distance is completed and the operation command is input for restarting,
The stop braking distance obtained up to that point is reset (step S45), CNDDAT is set to 0, and the process exits (step S46).

Next, for the calculation result of the stop braking distance, the appropriateness judgment is executed based on the flowchart of FIG. 4 as in the first embodiment, and if it is within the reference range, the appropriateness judgment display section 24 is displayed. The operator is informed by displaying the normal display and displaying the abnormal display if it is out of the reference range.

As a result, the worker operates the safety circuit to make an emergency stop when the step reaches a specific place on the escalator as in the conventional case, and the stop braking is actually applied until the step stops. It is possible to recognize the stop braking distance at the time of the emergency stop of the escalator by looking at the display of the stop braking distance display section 25, by simply activating the safety circuit without performing the work of actually measuring the distance. The suitability can be recognized by looking at the judgment display of the suitability display unit 24.

In the second embodiment, the calculation result of the stop braking distance and the adequacy determination result are displayed, and the calculation result is stored. However, as an embodiment of the invention of claim 2, Can be configured so that only the stop braking distance is calculated, and how the data of the calculation result is used can be left to the intention of the user.

Further, as a common embodiment of the inventions of claims 2 and 3, in the above-mentioned second embodiment, only the calculation result of the stop braking distance is displayed without displaying the judgment result of suitability. Can be Further, as a common embodiment of the inventions of claims 2 and 4,
In the second embodiment described above, only the judgment result of the suitability of the stop braking distance may be displayed, and the stop braking distance data itself may not be displayed. Further, as a common embodiment of the inventions of claim 2, claim 3, and claim 4, the history of the stop braking distance is not stored, and the measurement result of the stop braking distance and its suitability are obtained only during the stop braking distance evaluation work. It is possible to have a configuration in which the determination result of is displayed.

[0058]

As described above, according to the invention of claim 1,
If the stop command detection unit detects an externally supplied stop command for the conveyor and the rotation speed of the electric motor for driving the step decreases due to the stop control, the stop determination unit determines that the rotation speed detected by the speed detector is a predetermined value. When the stop judgment is made when the value becomes lower than the set value, and the stop braking distance calculation unit receives the stop judgment signal from the stop judgment unit, braking from the time when the stop command detection unit receives the stop judgment signal to the time when the stop judgment signal is received. Since the distance is calculated based on the speed signal of the speed detector, it is troublesome for the worker to operate the safety circuit while paying attention to the movement of the step as before, and then measure the stop distance. Even without such work, the stop braking distance can be automatically measured on the device side simply by giving the operation command of the safety circuit, and the stop braking distance can be accurately measured with little labor. .

According to the second aspect of the present invention, the stop command detection unit detects an externally supplied stop command for the passenger conveyor, and the stop control reduces the rotational speed of the motor for driving the step, and synchronizes with this. If the moving speed of the handrail also decreases, the stop judgment unit makes a stop judgment when the moving speed detected by the handrail speed detector becomes lower than a preset value, and the handrail braking distance calculation unit makes a stop judgment from the stop judgment unit. When the signal is received, the handrail braking distance from the time when the stop command is detected by the stop command detector to the time when the stop determination signal is received is calculated based on the speed signal from the handrail speed detector. Since the stop braking distance of the electric motor is calculated based on the handrail braking distance calculated by the braking distance calculation unit, the worker operates the safety circuit while paying attention to the movement of the step as in the conventional case. Even if you do not do the troublesome work of actually measuring the stop distance after that, the stop braking distance can be automatically measured on the device side simply by giving the operation command of the safety circuit, and the stop braking distance can be measured. Can be done accurately with little effort.

According to the invention of claim 3, in the invention of claim 1 or 2, the stop braking distance calculated by the stop braking distance calculating section is displayed by the stop braking distance display section. The stop braking distance can be evaluated and the stop braking distance can be evaluated more efficiently and accurately.

According to the invention of claim 4, in any one of claims 1 to 3, it is determined whether the stop braking distance calculated by the stop braking distance calculation unit falls within a preset allowable range. The stop braking distance adequacy determination unit determines whether the stop braking distance is normal or abnormal, and the result of this stop braking distance adequacy determination unit is displayed on the display unit. The evaluation of stop braking distance can be performed more efficiently and accurately.

According to the invention of claim 5, in the invention of any one of claims 1 to 4, since the history of the stop braking distance calculated by the stop braking distance calculating section is stored in the memory, the memory is stored later. By reading the data of
It is possible to evaluate not only the stop braking distance evaluation test, but also the stop braking distance of the passenger conveyor at the time of an emergency stop that occurs during normal operation.

[Brief description of drawings]

1 is a circuit block diagram of a common embodiment of the inventions of claims 1 and 3 to 5;

FIG. 2 is a functional block diagram of a control circuit in the above embodiment.

FIG. 3 is a flowchart showing stop braking distance calculation processing of the above embodiment.

FIG. 4 is a flowchart showing a process of determining whether or not the stop braking distance is appropriate according to the embodiment.

FIG. 5 is a circuit block diagram of a common embodiment of the inventions of claims 2-5.

FIG. 6 is a functional block diagram of a control circuit in the above embodiment.

FIG. 7 is a flowchart showing stop braking distance calculation processing of the above embodiment.

FIG. 8 is a circuit block diagram of a conventional example.

FIG. 9 is a block diagram of a conventional brake circuit.

[Explanation of symbols]

 11 Induction Motor 12 Handrail Belt 13 Brake Circuit 14 Speed Detector 14 'Counter 15 Pulse Generator 15' Pulse Generator 16 Safety Circuit 17 Driving Circuit 18 Control Circuit 24 Proper Judgment Display 25 Stop Braking Distance Display

Claims (5)

[Claims] 1. A motor for driving a step, a speed detector for detecting a rotation speed of the motor, a stop command detector for detecting a stop command of the man conveyor given from the outside, and the speed detector. A stop determination unit that determines a stop when the rotation speed to be detected becomes lower than a predetermined set value, and a stop determination signal of the stop determination unit that receives the stop determination signal of the stop determination unit from the time when the stop command is detected by the stop determination unit. And a stop braking distance calculating unit for calculating a braking distance up to the reception time of the signal based on the speed signal of the speed detector. 2. An electric motor for driving a step, a handrail driven by the electric motor in synchronism with the step, a handrail speed detector for detecting a driving speed of the handrail, and the man conveyor provided from the outside. A stop command detecting unit for detecting a stop command of, a stop determining unit for determining stop when the drive speed detected by the handrail speed detector becomes lower than a predetermined set value, and a stop determining signal for the stop determining unit. And a handrail braking distance calculator that calculates the handrail braking distance from the time when the stop instruction is detected by the stop instruction detector to the time when the stop determination signal is received, based on the speed signal of the handrail speed detector; A passenger conveyor control device comprising: a stop braking distance calculation unit that calculates a stop braking distance of the electric motor based on the handrail braking distance calculated by the distance calculation unit. 3. The passenger conveyor control device according to claim 1, further comprising a stop braking distance display unit that displays the stop braking distance calculated by the stop braking distance calculation unit. 4. A stop braking distance adequacy determining unit that determines whether the stop braking distance is normal or abnormal depending on whether or not the stop braking distance calculated by the stop braking distance calculating unit falls within a preset allowable range. 4. The passenger conveyor control device according to claim 1, further comprising a display unit that displays a determination result of the stop braking distance appropriateness determination unit. 5. A memory for storing a history of the stop braking distance calculated by the stop braking distance calculator.
~ The passenger conveyor control device according to claim 4.