JP2013256369A - Passenger conveyor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a passenger conveyor which does not raise the inner temperature of an electric power converter without providing a particular device.SOLUTION: An electric power converter 17 is provided on the internal part of a second control device 16 installed on an upper floor side machine room 102, a first temperature sensor 18 is provided on the electric power converter 17, and a second temperature sensor 20 is provided on the upper part of the upper floor side machine room 102. When the detection temperature of the first temperature sensor 18 is higher than a first reference temperature, a first low speed operation is performed, and when the detection temperature of the second temperature sensor 20 is higher than a second reference temperature, a second low speed operation with a further lower speed is performed.

Description

  This embodiment relates to passenger conveyors such as escalators and moving walkways.

  In recent years, many passenger conveyors installed have adopted an inverter device, that is, a method of controlling an operation speed using a power converter. This power converter is a device that generates heat due to an operating load, and generates more heat as the number of passengers on the steps of the passenger conveyor increases.

  Further, a general power converter is provided with a safety circuit that stops output in order to prevent malfunction of components when the internal temperature exceeds a certain temperature. However, when a state in which the safety circuit as described above is activated and stopped in the passenger conveyor occurs, a large number of passengers stop on the step without any prior notice. Therefore, a passenger on the step may be thrown out in the direction that has been moved so far due to inertia. If the passenger conveyor is operating in the downward direction, it may fall to the lower floor.

  In order to prevent such an accident, in a passenger conveyor using a power converter, an air conditioner is provided to cool the power converter, or a heat radiating device is provided to prevent an increase in temperature.

JP 2001-335270 A JP 2007-153536 A JP 2007-238293 A

  However, in order to install an air conditioner or a heat dissipation device in the power converter, it is necessary to have a larger space than to accommodate a normal control device, or it is necessary to construct a pipe for circulating the refrigerant of the air conditioner. There was a problem in terms of space and cost.

  Then, this embodiment aims at providing the passenger conveyor which does not raise the internal temperature of a power converter, without providing a special apparatus in view of the said problem.

  The present embodiment includes a first temperature sensor provided in the machine room of the truss, a second temperature sensor provided in a control device disposed in the machine room, and (1) a temperature detected by the first temperature sensor. Is higher than the first reference temperature, or when the detected temperature of the second temperature sensor is higher than the second reference temperature, the first low speed operation is performed at the first low speed v1 that is lower than the normal speed v0 of the normal operation. (2) When the detected temperature of the first temperature sensor is higher than the first reference temperature and the detected temperature of the second temperature sensor is higher than the second reference temperature, the second low speed v2 A main conveyor that performs the second low-speed operation at (0 <= v2 <v1 <v0).

It is a general view of the escalator of this embodiment. It is a perspective view from the bottom of the 2nd control unit and a power converter. It is a block diagram of an escalator. It is a flowchart which shows the operating state of an escalator.

  Hereinafter, the passenger conveyor of this embodiment is demonstrated based on FIGS. In this embodiment, the escalator 100 is described as a passenger conveyor.

(1) Structure of Escalator 100 The structure of the escalator 100 will be described with reference to FIG. FIG. 1 is an explanatory view of the escalator 100 as viewed from the side.

  The truss 2 of the escalator 100 is supported by the building 1 across the upper floor 1a and the lower floor 1b of the building 1 via support angles 2a and 2b.

  A driving device 3 is provided in the upper floor side machine room 102 at the upper end of the truss 2. The drive device 3 is connected to a drive chain 7 via an electric motor (IM) 4 and a transmission speed reduction device 6, and a drive sprocket 8 is driven by the drive chain 7. The electric motor 4 can be controlled by an inverter, and can change the rotation speed according to the frequency of an input control signal.

  A driven sprocket 9 is provided in the lower floor side machine room 104 at the lower end of the truss 2, and an endless step chain 10 is spanned between the drive sprocket 8 and the driven sprocket 9, and a plurality of steps are provided on the step chain 10. The steps 11 are connected at equal intervals.

  A front wheel and a rear wheel are attached to the front and rear of the step 11, and the front wheel and the rear wheel are provided by a guide rail including an unillustrated forward guide rail, a return guide rail, and a reverse guide rail provided in the truss 2. By being guided, the plurality of steps 11 circulates in conjunction with the movement of the step chain 10.

  The upper part of the position where the step 11 is reversed is a user entrance / exit, and boarding / exit plates 12a and 12b are provided at the entrance / exit. A pair of left and right balustrades 13 and 13 are erected on the left and right sides of the truss 2. A handrail belt 14 that travels in synchronization with the step 11 is provided above the pair of left and right balustrades 13 and 13.

  A first control device 15 and a second control device 16 are provided inside the upper floor side machine room 102. The first control device 15 is provided in front of the upper floor side machine room 102, and the second control device 16 is provided on a side surface of the upper floor side machine room 102. The first control device 15 is provided with a power converter 17 that controls the electric motor 4 with an inverter. The second control device 16 is provided with control means for devices other than the electric motor 4 (for example, a safety circuit) and a main control unit of the escalator 100.

  A first temperature sensor 18 is provided in the vicinity of the power converter 17 in the first control device 15. Further, a second temperature sensor 20 is provided at the lower part of the boarding / alighting plate 12 a constituting the ceiling part of the upper floor side machine room 102.

(2) Structure of the 1st control apparatus 15 Next, the structure of the 1st control apparatus 15 is demonstrated based on FIG. FIG. 2 is a simplified perspective view of the first control device 15 as viewed from below.

  A plurality of intake ports 24 of the first control device 15 are opened on the lower surface of the metal case 22 constituting the first control device 15. A rectangular parallelepiped power converter 17 is accommodated in the case 22 of the control device 15. A cooling fan 26 is provided inside the power converter 17, a plurality of intake ports 28 are provided on the lower surface of the power converter 17 corresponding to the cooling fan 26, and an exhaust port 30 is provided on the side surface. The first temperature sensor 18 described above is installed outside the intake port 28 and below the control device 15.

(3) Electrical configuration of escalator 100 Next, the electrical configuration of the escalator 100 will be described with reference to FIG. FIG. 3 is a block diagram of the escalator 100.

  The first control device 15 and the power converter 17 are connected to the second control device 16, and the first temperature sensor 18 is also connected to the main control means of the second control device 16. The second temperature sensor 20 provided at the lower part of the boarding / alighting plate 12 a is also connected to the main control means of the second control device 16.

  The power converter 17 is an apparatus that performs inverter control of the electric motor 4, and outputs a control signal having a frequency corresponding to the rotational speed of the electric motor 4 to the electric motor 4 based on the frequency command signal input from the second control apparatus 16. .

  When the temperature detected by the first temperature sensor 18 reaches a first reference temperature (for example, 45 ° C.), the first temperature sensor 18 sends a first high temperature signal to the second controller 16 in order to reduce the amount of heat generated by the power converter 17. Output to. As shown in FIG. 2, the reason for installing the first temperature sensor 18 at the intake port 28 of the power converter 17 is that the temperature of the air sucked from the suction port 28 by the cooling fan 26 reaches the first reference temperature. This is because the sensor 18 detects this, and the second control device 16 can perform control to reduce the amount of heat generated before the power converter 17 reaches the first reference temperature.

  When the temperature detected by the second temperature sensor 20 reaches a second reference temperature (for example, 50 ° C.), the second temperature sensor 20 performs a second control on the second high temperature signal in order to further reduce the amount of heat generated by the power converter 17. Output to the device 16. As shown in FIG. 1, the reason for providing the second temperature sensor 20 at the lower part of the boarding / alighting plate 12a is that when the temperature inside the upper floor side machine room 102 rises, the temperature of the ceiling part of the upper floor side machine room 102 rises most. Because it does. Therefore, the 2nd temperature sensor 20 is provided in the lower part of the boarding board 12a located in this ceiling part, and detects the highest temperature in the upper floor side machine room 102. FIG.

(4) Operating State of Escalator 100 Next, the operating state of the escalator 100 will be described based on the flowchart of FIG.

  In step S1, the administrator of the escalator 100 operates an operation switch using an operation board (not shown), inputs an operation start command to the main control means of the second control device 16, and proceeds to step S2.

  In step S <b> 2, the second control device 16 sends a frequency output command for causing the electric motor 4 to normally operate at the normal speed v <b> 0 (for example, v <b> 0 = 30 m / sec) to the power converter 17 via the first control device 15. Output. Then, the process proceeds to step S3.

  In step S3, the electric motor 4 supplied with the control signal having the frequency corresponding to the normal speed v0 from the power converter 17 starts normal operation at the normal speed v0. Then, the process proceeds to step S4.

  In step S4, when the escalator 100 continues normal operation and the number of passengers on the escalator 100 increases, the operation load increases and the amount of heat generated by the power converter 17 also increases. When the first temperature sensor 18 reaches a preset first reference temperature (for example, 45 ° C.), the first high temperature signal is output to the second controller 16 and the process proceeds to step S5 (in the case of YES). . On the other hand, if the first reference temperature has not been reached, the amount of heat generated by the power converter 17 is not large, and the process returns to step S2 (in the case of NO).

  In step S5, since the first high temperature signal is input from the first temperature sensor 18 to the second controller 16, the second controller 16 determines that the motor 4 has the first low speed v1 (provided that 0 <v1 <v0. For example, a frequency output command for the first low speed operation is output to the power converter 17 at v1 = 20 m / sec)). Then, the process proceeds to step S6.

  In step S6, the electric motor 4 becomes the first low speed v1 slower than the normal speed v0 by the power converter 17, and the escalator 100 performs the first low speed operation slower than the normal operation. Then, the process proceeds to step S7.

  Even if the operation at the first low speed operation is continued in step S7, if the amount of heat generated by the power converter 17 is further increased without reducing the number of passengers on the escalator 100, the exhaust from the power converter 17 causes the inside of the upper floor side machine room 102 to Temperature rises. When the temperature detected by the second temperature sensor 20 reaches a preset second reference temperature (for example, 50 ° C.), a second high temperature signal is output from the second temperature sensor 20 to the second controller 16 (YES) in the case of). Then, the process proceeds to step S8. On the other hand, if the temperature inside the upper floor side machine room 102 has not reached the second reference temperature, the process returns to step S4 (in the case of NO).

  In step S8, the second control device 16 performs the second low speed operation (ultra low speed operation) when the electric motor 4 is at the second low speed v1 (where 0 <v2 <v1 <v0, for example, v2 = 10 m / sec). To output to the power converter 17. Then, the process proceeds to step S9.

  In step S9, the electric motor 4 becomes the second low speed v2 that is slower than the first low speed v1, and the escalator 100 performs the second low speed operation. Then, the process proceeds to step S10.

  In step S <b> 10, it is determined whether or not a stop signal for the escalator 100 is input to the second control device 16. This stop signal is output, for example, when the temperature of the power converter 17 continues to rise and outputs a stop signal, or when the number of passengers increases and the safety circuit is activated. If a stop signal is input to the second control device 16, the process proceeds to step S11 (in the case of YES), and if not input, the process returns to step S7 (in the case of NO).

  In step S11, since the stop signal is input, the second control device 16 outputs the output stop signal to the power converter 17, and the process proceeds to step S12.

  In step S12, the electric motor 4 is stopped by the power converter 17, and the escalator 100 is stopped. And it ends.

  On the other hand, if the number of passengers on the escalator 100 decreases while continuing the second low-speed operation, the amount of heat generated from the power converter 17 also decreases, and the temperature in the upper floor machine room 102 decreases and becomes lower than the second reference temperature. The second high temperature signal from the second temperature sensor 20 disappears, and the process proceeds to NO in step S7 and returns to step S4.

  When the number of passengers using the escalator 100 is further reduced in step S4 and the temperature of the power converter 17 decreases and becomes lower than the first reference temperature, the first high temperature signal from the first temperature sensor 18 disappears and the NO side is reached. Proceed and return to step S2.

  In step S <b> 2 that has been returned, the second control device 16 outputs to the power converter 17 a frequency output command for the electric motor 4 to normally operate at the normal speed v <b> 0. Therefore, in step S3, the escalator 100 performs normal operation at the normal speed v0.

(5) Effect According to the present embodiment, when the number of passengers using the escalator 100 increases and the amount of heat generated by the power converter 17 increases, the operation is stopped at a low speed, so that the output stop operation for preventing malfunction due to temperature rise is suppressed. In addition, continuous operation can be continued. That is, before the temperature inside the power converter 17 rises and the output stop operation due to internal protection is performed, the speed of the escalator 100 is reduced, thereby reducing the load on the power converter 17 and suppressing the output stop operation.

  Moreover, since the escalator 100 is stopped by performing two-stage low-speed driving, the escalator 100 does not stop suddenly, and the safety of passengers on the steps can be ensured.

  In addition, since the escalator 100 is stopped by performing two-stage low-speed operation, the carrying capacity of the escalator 100 does not drop suddenly.

  Further, when the detected temperatures of the two temperature sensors 18 and 20 are lower than the first reference temperature and the second reference temperature, the normal operation can be restored.

  Moreover, since the 1st temperature sensor 18 is provided in the inlet 28 of the power converter 17, a 1st low speed driving | operation can be performed before the power converter 17 becomes 1st reference temperature.

  Moreover, since the 2nd temperature sensor 20 is provided in the lower part of the boarding / alighting board 12a, the highest temperature is detectable in the temperature of the upper floor side machine room 102. FIG.

  Conventionally, it has been necessary to provide an additional device such as an air conditioner or a heat radiating device. However, according to the present embodiment, the escalator 100 can be continuously operated without stopping only by providing two temperature sensors. This can save not only the cost but also the installation space of the control device.

(6) Modification Example In the above embodiment, the first low-speed operation and the second low-speed operation (ultra-low speed operation) are two-stage continuous operation. However, the present invention is not limited to this. By doing so, the temperature inside the power converter 17 can be lowered to a temperature at which low-speed operation can be performed earlier than ultra-low speed operation.

  In the above embodiment, the low-speed operation is not performed unless the first temperature sensor 18 becomes equal to or higher than the first reference temperature. However, the present invention is not limited to this, and the detected temperature of the second temperature sensor 20 is the second reference temperature first. If the value reaches, low speed operation may be performed. For example, this is a case where the temperature inside the upper floor side machine room 102 rises due to heat generated from the electric motor 4.

  Moreover, in the said embodiment, although the 1st temperature sensor 18 was provided in the inlet 28 of the power converter 17, it may be another place as long as it can measure the temperature of the power converter 17 not only in this, for example, You may attach to the case 22 of the power converter 17 directly.

  Moreover, in the said embodiment, although the 2nd temperature sensor 20 was provided in the lower part of the boarding / alighting board 12a, if it is a place which can detect the temperature of the upper floor side machine room 102 not only this but another place, for example, You may attach to the beam of the truss 2 which comprises the upper floor side machine room 102, and you may provide in the stand of the electric motor 4. FIG.

  Moreover, in the said embodiment, although the 1st temperature sensor 18 was installed in order to detect the temperature of the power converter 17, you may make it detect the temperature of the control apparatus which not only this but a temperature rise produces.

  Moreover, although the said embodiment demonstrated by the escalator, you may apply the structure of this embodiment not only to this but to the moving walk.

  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 100 ... Escalator, 102 ... Upper floor side machine room, 4 ... Electric motor, 12a, 12b ... Boarding board, 15 ... 1st control apparatus, 16 ... 2nd control apparatus, 17 ... Power converter, 18 ... First temperature sensor, 20 ... Second temperature sensor, 22 ... Case, 24 ... Inlet, 26 ... Fan, 28 ... Inlet 30 ... Exhaust port

The present embodiment includes a first temperature sensor provided in the machine room of the truss, a second temperature sensor provided in a control device disposed in the machine room, and (1) a temperature detected by the first temperature sensor. Is higher than the first reference temperature, or when the detected temperature of the second temperature sensor is higher than the second reference temperature, the first low speed operation is performed at the first low speed v1 that is lower than the normal speed v0 of the normal operation. (2) When the detected temperature of the first temperature sensor is higher than the first reference temperature and the detected temperature of the second temperature sensor is higher than the second reference temperature, 0 <= v2 < v1 <a main control means for performing a second low-speed operation at a second lower speed v2 with the relationship v0, a passenger conveyor having.

Claims (6)

A first temperature sensor provided in the machine room of the truss;
A second temperature sensor provided in a control device disposed in the machine room;
(1) When the detected temperature of the first temperature sensor is higher than the first reference temperature, or when the detected temperature of the second temperature sensor is higher than the second reference temperature, it is lower than the normal speed v0 of normal operation. A first low speed operation is performed at a first low speed v1, and (2) the detected temperature of the first temperature sensor is higher than a first reference temperature, and the detected temperature of the second temperature sensor is the second reference temperature. If higher, the main control means for performing the second low speed operation at the second low speed v2 (0 <= v2 <v1 <v0);
With passenger conveyor. The second temperature sensor is provided at a lower portion of the boarding / exiting plate,
The passenger conveyor according to claim 1. The first temperature sensor is provided in a power converter in the control device.
The passenger conveyor according to claim 1 or 2, comprising: The first temperature sensor is provided at an intake port of a cooling fan provided in the power converter.
The passenger conveyor according to claim 3. When the detected temperature of the first temperature sensor is lower than the first reference temperature and the detected temperature of the second temperature sensor is lower than the second reference temperature, the main control means is configured to change the normal speed v0. To return to the normal operation of
The passenger conveyor as described in any one of Claims 1 thru | or 4. The second low speed v2 is 0;
The passenger conveyor as described in any one of Claims 1 thru | or 5.

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