JP5614780B2 - Passenger conveyor - Google Patents

Description

  Embodiments of the present invention relate to passenger conveyors such as escalators and moving walkways.

  The passenger conveyor motor is provided with a thermal protector for overheat protection. If the start-up is repeated for a short time during the inspection operation by the maintenance staff, the motor overheats, the thermal protector operates and becomes in a failure stop state, and it takes time to recover until the motor is cooled.

  As a countermeasure, for example, there is a technology that suppresses the operation of the thermal protector by operating the timer once after a short time start (inching operation) and preventing the next inching operation only after a predetermined time. .

JP-A-5-139675

  If the timer as described above is provided to increase the time until the next jogging operation, there is a problem that the operation waiting time becomes long. In particular, in the inspection operation, it is necessary to finish the inspection work as soon as possible, and there is a problem that the waiting time is wasted for the maintenance staff.

  Then, in view of the said problem, embodiment of this invention aims at providing the passenger conveyor which can perform the jogging driving | operation at the time of a check operation reliably, without generating the overload of a motor.

The present embodiment includes a driving unit that drives a motor that moves a step, an operation switching unit that switches the driving unit to a normal operation or an inspection operation, and when the operation switching unit switches to the inspection operation. a counting means for counting the number of activations of the drive means, to a predetermined a predetermined time from the start of the counting, the count number k of the number of activations is the first threshold value A1 (provided that 1 <A1) And a control means for warning by a warning means that the first threshold value A1 has been exceeded.

It is explanatory drawing seen from the side of the escalator of this embodiment. It is a front view of the operation panel on the upper floor side. It is a front view of the operation panel on the lower floor side. It is a top view of a control device. It is a front view of a control device. It is a block diagram of a main control part. It is a circuit diagram of an operation circuit, (a) is a drive circuit, (b) is a control circuit. It is a flowchart which shows the operation state during a check driving | operation.

  Hereinafter, the passenger conveyor of one embodiment is explained based on Drawing 1-Drawing 8 taking escalator 10 as an example.

(1) Structure of the escalator 10 The structure of the escalator 10 is demonstrated based on FIG. FIG. 1 is an explanatory view of the escalator 10 as seen from the side.

  A truss 12 of the escalator 10 is supported via support angles 2 and 3 across the upper and lower floors of the building 1. A driving device 18 is provided inside the upper floor machine room 14 at the upper end of the truss 12. A motor 20 and a drive chain 22 operated by the motor 20 are connected to the drive device 18, and a drive sprocket 24 is driven by the drive chain 22. The motor 20 is provided with an overload protection device such as a thermal protector. Further, a control device 50 is provided inside the machine room 14 on the upper floor side. A driven sprocket 26 is provided in the lower floor machine room 16 at the lower end of the truss 12, and a step chain 28 is spanned between the drive sprocket 24 and the driven sprocket 26. The steps 30 are connected at equal intervals.

  A front wheel 30 a and a rear wheel 30 b are attached to the front and rear of the step 30, and the front wheel 30 a and the rear wheel 30 b are guides including an unillustrated forward guide rail, a return guide rail, and a reverse guide rail provided in the truss 12. By being guided by the rail, the plurality of steps 30 circulate in conjunction with the movement of the step chain 28.

  The upper part of the position where the step 30 is inverted is a user entrance / exit, and an entrance board 32 on the upper floor side and an entrance board 34 on the lower floor side are provided at the entrance / exit.

  On the left and right sides of the truss 12, a pair of left and right balustrades 36 are erected. A handrail belt 38 moves on top of the balustrade 36. A front skirt guard 40 is provided to cover the front lower part of the upper floor side of the balustrade 36, and a lower front skirt guard 42 is provided at the lower front part of the lower floor side, from the front of the front skirt guards 40, 42, Inlet portions 46 and 48, which are entrances and exits of the handrail belt 38, protrude. A skirt guard 44 is provided at the lower side of the balustrade 36. The upper floor side front skirt guard 40 is provided with an upper floor side operation panel 52, and the skirt guard 44 near this is provided with an upper floor side speaker 54. The lower floor side front skirt guard 42 is also provided with a lower floor side operation panel 56, and the skirt guard 44 in the vicinity thereof is provided with a lower floor side speaker 58.

(2) Operation panels 52 and 56
Next, the structure of the operation panels 52 and 56 will be described with reference to FIGS.

  The upper floor side operation panel 52 is provided on the side surface of the upper floor side front skirt guard 40 as described above. The operation panel 52 includes an up / down changeover switch 68, a start switch 70, an emergency stop button 72, and a display unit 74.

  The spring return type up / down changeover switch 68 is rotated to the left when the maintenance person inserts the key and raises the escalator 10 and to the right when the escalator 10 is lowered.

  The spring return type start switch 70 inserts a key and rotates it to the right side when a maintenance person starts the escalator 10. Then, a buzzer sounds from the speakers 54 and 58 and the escalator 10 notifies the start. On the other hand, when the maintenance staff rotates to the left, the escalator 10 stops.

  The emergency stop button 72 is a button operated by a passenger or the like when the escalator 10 needs to be stopped during normal operation.

  The display unit 74 includes a liquid crystal display device in which two rows of seven-segment display bodies are arranged, and can digitally display numbers.

  Similarly, the operation panel 56 on the lower floor side includes an up / down changeover switch 69, a start switch 71, an emergency stop button 73, and a display unit 75.

(3) Control device 50
Next, the structure of the control apparatus 50 is demonstrated based on FIG.4 and FIG.5. 4 is a top view of the control device 50, and FIG. 5 is a front view.

  As described above, the control device 50 is provided in the machine room 14 on the upper floor side. The control device 50 includes a main control unit 60, an ascending contactor 62, a descending contactor 64, and a control circuit which will be described later. Further, on the upper surface of the control device 50, an operation changeover switch 66 is provided for switching between the case where the escalator 10 is normally operated and the case where the escalator 10 is inspected.

(4) Main control unit 60
Next, the configuration of the main control unit 60 will be described based on the block diagram of FIG.

  The main control unit 60 includes an input unit 88, a calculation unit 90, an output unit 92, and a storage unit 94. An ascending contactor 62, a descending contactor 64, and an operation changeover switch 66 are connected to the input unit 88. An SCC relay 96, a buzzer 98, and a display unit 74 of a safety circuit are connected to the output unit 92. The safety circuit is a circuit composed of a safety sensor that operates when a human body or a foreign object is pinched, a skirt guard pinched detection switch, and the like.

  The storage unit 94 stores a first threshold value A1 and a second threshold value A2 that indicate the number of times that the jogging operation is restricted during the inspection operation described later. As the first threshold value A1, for example, the number of times about five times before the thermal protector operates due to overheating of the motor 20 due to inching operation is obtained by experiment. As the second threshold value A2, for example, the motor 20 is inching operation. The number of times before the thermal protector is activated by overheating is calculated by experiment. However, 0 <A1 <A2.

(5) Driving Operation Circuit Next, the configuration of the driving operation circuit of the escalator 10 will be described based on the circuit diagram of FIG. The driving operation circuit includes a drive circuit shown in FIG. 7A, a control circuit shown in FIG. 7B, and a safety circuit (not shown).

  A drive circuit of the motor 20 will be described with reference to FIG. The power source 76 is a three-phase AC power source and is connected to the three-phase motor 20 via the ascending contactor 62 and the descending contactor 64. The ascending contactor 62 is input during the ascending (UP) operation, and the descending contactor 64 is input during the descending (DOWN) operation.

  The control circuit will be described with reference to FIG. In the control circuit, an SCC contact 78, a start switch 70, an up / down switch 68 on the upper floor side, an up / down switch 69 on the lower floor side, and an operation switch 66 are connected in series. Also, the ascending contactor 62, the descending contactor 64, the holding circuits 80 and 82, and the opening circuits 84 and 86 are connected in parallel. The SCC contact 78 is a contact of the SCC relay 96 of the safety circuit.

(6) Operating State of Normal Operation The operating state of the escalator 10 in normal operation will be described.

  When the maintenance staff raises the escalator 10 in the normal operation, the operation changeover switch 66 in the control device 50 is switched to the normal operation side and turned on.

  Next, when a maintenance person inputs the one-shot input of the spring return type start switch 70 to the “buzzer side (start side)” and turns it ON, the buzzer 98 sounds from the speakers 54 and 58 and the escalator 10 is started. To inform.

  Next, when the maintenance person inputs the spring return type up / down changeover switch 68 to the ascending side, the ascending contactor 62 is turned on, the retaining circuit 80 is retained, the opening circuit 86 is opened, and the motor 20 is operated in ascending operation. Rotate in the direction.

  Next, when the escalator 10 is stopped, when the maintenance engineer inputs the start switch 70 to the “stop side” by one shot, the holding circuit 80 of the ascending contactor 62 is opened, and the opening circuit 86 is turned on, so that the motor 20 The power supply to is cut off and stopped.

  On the other hand, when the escalator 10 is lowered, when the maintenance staff inputs the up / down selector switch 68 to the down (DOWN) side, the lowering contactor 64 is turned on, the holding circuit 82 is held, and the opening circuit 84 is opened. Then, the motor 20 rotates in the descending operation direction.

(7) Operation State of Inspection Operation Next, an operation state when the maintenance staff repeats the start-up (inching operation) for a short time during the inspection operation of the escalator 10 will be described based on the flowchart of FIG. Note that the “inching operation” refers to an operation that is repeatedly started for a short time in order to move the step 30 by several steps when the maintenance staff checks the step 30 of the escalator 10 or the like.

  First, the maintenance staff switches the operation changeover switch 66 in the control device 50 from the normal operation to the inspection operation in order to perform the inspection operation. As a result, the operation switch 66 in the driving operation circuit diagram is turned off.

  In step S1, the main control unit 60 determines whether the escalator 10 is in normal operation or in check operation. In the case of normal operation, step S1 (in the case of NO) is continued, and in the case of inspection operation, the process proceeds to step S2 (in the case of YES). Here, the role of the operation changeover switch 66 will be described. As shown in FIG. 7B, the operation changeover switch 66 is connected in series with the SCC contact 78, the up / down changeover switch 68 on the upper floor side, and the up / down changeover switch 69 on the lower floor side, and is always ON during normal operation. It is OFF during the inspection operation. As a result, during the inspection operation, a current flows through the ascending contactor 62 or the descending contactor 64 only while the maintenance staff inputs the up / down switching switch 68 on the upper floor side or the up / down switching switch 69 on the lower floor side, The motor 20 rotates and the escalator 10 can be moved in an inching manner.

  In step S2, the main control unit 60 starts counting one-shot inputs (operation signals) of the up / down changeover switches 68 and 69 operated by maintenance personnel. Thereby, the main control part 60 can count the count number k of the frequency | count of starting in an inching operation. Then, the process proceeds to step S3.

  In step S3, the calculation unit 90 of the main control unit 60 determines whether or not the count number k has exceeded the first threshold value A1 (described as threshold value 1 in the drawing) stored in the storage unit 94, and exceeds it. If so, the process proceeds to step S5 (in the case of YES), and if not, the process proceeds to step S4 (in the case of NO).

  In step S4, the main control unit 60 determines whether or not a predetermined time (for example, 5 minutes) has elapsed since the start of counting, and if it has elapsed, the process proceeds to step 10 to reset the count ( If yes). On the other hand, if it has not elapsed, the process returns to step S3 (in the case of NO).

  In step S5, since the count number k exceeds the first threshold value A1, the main control unit 60 sounds the buzzer 98 from the speakers 54 and 58 to generate a warning sound. Then, the process proceeds to step S6. Thus, when the count number k exceeds the first threshold value A1, a warning sound is generated by the buzzer 98 to notify the maintenance personnel that the number of times that the inching operation can be performed is close to the limit number.

  In step S6, the calculation unit 90 of the main control unit 60 determines whether or not the count number k has exceeded a second threshold value A2 (described as threshold value 2 in the drawing) stored in the storage unit 94. If so, the process proceeds to step S8 (in the case of YES), and if not, the process proceeds to step S7 (in the case of NO).

  In step S7, the main control unit 60 determines whether or not a certain time (for example, 5 minutes) has elapsed since the start of counting, and proceeds to step 10 if it has elapsed (in the case of YES). The count is reset and the process returns to step S1. The main control unit 60 returns to step S6 when the predetermined time has not elapsed (in the case of NO).

  In step S8, the main control unit 60 causes the buzzer 98 to beep from the speakers 54 and 58 because the count number exceeds the second threshold value A2, and forcibly activates the escalator 10 by operating the safety circuit. Stop. Then, the process proceeds to step S9.

  In step S9, the main control unit 60 determines whether or not a certain time (for example, 10 minutes) has elapsed since the stop, and if it has elapsed (in the case of YES), the main control unit 60 proceeds to step 10 to reset the count. Then, the process returns to step S1. As a result, the jogging operation can be performed again. Then, the main control unit 60 continues the operation of step S9 when the predetermined time has not elapsed.

(8) Effect According to the present embodiment, when the maintenance staff repeats the jogging operation, a warning sound is notified when the limit number of times that the jogging operation can be repeated is approached, and the jogging operation is further performed. The warning sound is further notified before the thermal protector is operated, and the escalator 10 is automatically stopped. Therefore, the thermal protector of the motor 20 does not operate and enter into a failure state.

  Further, after the escalator 10 is automatically stopped, the jogging operation can be performed again when the motor 20 is cooled after a predetermined time has elapsed.

(9) Modification 1
In the above embodiment, the warning is given only with the warning sound, but instead, the display unit 74 may indicate the number of times that the inching operation can be performed with a number. In this case, in step S2 in FIG. 8, every time counting is started, a number B obtained by subtracting the count number k from the first threshold value A1 is displayed. However, B = A1-k.

  Thus, the maintenance staff can determine how many times the jogging operation can be performed while looking at the display unit 74. In the case of this control, the second threshold value A2 is not provided, and when the count number becomes 0, the escalator 10 may be stopped by operating the safety circuit.

(10) Modification 2
In the above embodiment, only a warning sound is generated by the buzzer 98. Instead, when the first threshold value A1 is exceeded, the speaker 54, 58 broadcasts that “short-time startup continues”. When the second threshold value A2 is exceeded, an alarm announcement such as “Motor may overheat, so operation is stopped” may be broadcasted to alert the maintenance staff.

(11) Modification 3
In this modified example, in step S9, the return time is displayed on the display unit 74 in the process of determining whether or not a certain time has elapsed since the main control unit 60 stopped.

  As a result, the maintenance staff can see at a glance how many minutes will return after seeing the display unit 74, and the convenience of the inspection operation can be improved.

(12) Modification 4
In the above embodiment, the first threshold value A1 and the second threshold value A2 stored in the storage unit 94 are constant. However, the ambient temperature in the truss 12 also changes depending on the installation environment of the escalator 10 and the like. Even with the same number of startups, the influence of heat generation on the motor 20 changes.

  Therefore, in this modified example, a temperature sensor is provided on the surface of the motor 20, the detected temperature is detected by the control device 50, and the first threshold value A1 and the second threshold value A2 are corrected.

  For example, in principle, the first threshold A1 is 10 times and the second threshold A2 is 20 times. In this case, when the detected temperature of the temperature sensor is higher than the first reference temperature T1 (for example, 40 ° C.), the first threshold A1 is decreased to 8 times, and the detected temperature of the temperature sensor is set to the second reference temperature T2 (for example, If lower than 20 ° C., the first threshold value A1 is increased to 18 times. Further, when the detected temperature of the temperature sensor is higher than the third reference temperature T3, the second threshold A2 is decreased to 16 times, and when the detected temperature of the temperature sensor is lower than the fourth reference temperature T4, the second threshold A2 is set. It may be increased to 22 times.

  Furthermore, when the escalator 10 stops exceeding the second threshold A2, the return time from the stop to the return may also be changed according to the temperature detected by the temperature sensor. For example, when the detected temperature at the time of stop is higher than the fifth reference temperature T5, the return time is lengthened, and when it is lower than the sixth reference temperature T6, the return time is shortened.

(13) Modification 5
In this modified example, the motor 20 is provided with a cooling fan. And when the escalator 10 has stopped exceeding 2nd threshold value A2, this cooling fan is operated, the motor 20 is cooled, and it is prevented that it becomes a failure stop of the operation | movement of a thermal protector by an inching operation.

  Further, the buzzer 98 may be sounded when the first threshold value A1 or the second threshold value A2 is exceeded, and the motor 20 may be cooled by operating a cooling fan.

(14) Modification 6
In the said embodiment, although the escalator 10 demonstrated as a passenger conveyor, you may adapt to a moving sidewalk.

(15) Others Although one embodiment of the present invention has been described above, this embodiment is presented as an example and is not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 10 ... Escalator, 20 ... Motor, 50 ... Control device, 52 ... Control panel, 54 ... Speaker, 56 ... Control panel, 58 ... Speaker, 60 ... Main Control unit, 74 ... display unit, 98 ... buzzer

Claims (9)

Driving means for driving a motor for moving the steps;
With respect to the driving means, operation switching means for switching to normal operation or inspection operation;
A count unit that counts the number of activations of the driving unit when the operation switching unit switches to the inspection operation;
The predetermined within a certain time period from the start of the counting, the count number k of the number of activations is the first threshold value A1 (where 1 <a A1) when exceeded, exceeds the first threshold value A1 Control means for warning by means of warning means;
With passenger conveyor. The control means stops and does not start the motor when the count number k exceeds a second threshold A2 (where 1 <A1 <A2).
The passenger conveyor according to claim 1. The warning means outputs a warning buzzer or a warning message.
The passenger conveyor according to claim 1 or 2, comprising: It further has a display means for digitally displaying numbers,
The control means displays the remaining number of activations B up to the first threshold A1 (where B = A1-k) on the display means.
The passenger conveyor as described in any one of Claims 1 thru | or 3. It further has a display means for digitally displaying numbers,
The control means stops the motor when the count number k exceeds the second threshold A2, prevents the motor from starting, and displays the return time from the stop to the return on the display means.
The passenger conveyor according to claim 2. A temperature sensor for detecting the temperature of the motor;
The control means decreases the first threshold A1 when the detected temperature of the temperature sensor is higher than the first reference temperature T1, or the detected temperature of the temperature sensor is the second reference temperature T2 (however, , T2 <= T1), the first threshold value A1 is increased.
The passenger conveyor as described in any one of Claims 1 thru | or 5. A temperature sensor for detecting the temperature of the motor;
The control means decreases the first threshold A1 when the detected temperature of the temperature sensor is higher than the first reference temperature T1, or the detected temperature of the temperature sensor is the second reference temperature T2 (however, , T2 <= T1), the first threshold value A1 is increased, and if the detected temperature of the temperature sensor is higher than the third reference temperature T3, the second threshold value A2 is decreased, or When the detected temperature of the temperature sensor is lower than the fourth reference temperature T4 (where T4 <= T3), the second threshold A2 is increased.
The passenger conveyor according to claim 2. When the detected temperature of the temperature sensor is higher than the fifth reference temperature T5, the control means shortens the return time from the stop to the return, or the detected temperature of the temperature sensor is the sixth reference temperature. If it is higher than T6 (where T6 <= T5), the return time is shortened.
The passenger conveyor according to claim 6 or 7. A cooling fan for cooling the motor;
The control means rotates the cooling fan when warned by the warning means or when the control means stops.
The passenger conveyor according to claim 2.

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