JP6689221B2 - Passenger conveyor - Google Patents

Description

  The present invention relates to a passenger conveyor provided with a plurality of drive devices.

  In Patent Document 1, an idler sprocket is provided at each of both ends in the lengthwise direction, and an endless step chain having a fixed step for passengers is wound around these idler sprockets. Is provided with one or a plurality of drive devices for driving and braking the step chain, and the drive device includes a drive gear having an involute tooth profile and engaging with the step chain. The passenger conveyor is characterized in that the above-mentioned step chain is engaged with only one of the upper chain and the lower chain.

  In Patent Document 2, two step chains in which a plurality of steps are connected steplessly, a pair of chain drive rotating bodies around which the step chains are wound, and a chain drive rotating body are provided outside the chain drive rotating bodies, respectively. In the passenger conveyor provided with the drive rotating body and two drive devices for driving the drive rotating body, the two drive devices are arranged side by side in the width direction of the machine room, and the two drive devices are provided outside the respective drive devices. The output shafts projecting in the direction, the small rotating bodies are fitted to the respective output shafts, and one of the driving rotating bodies is driven through the small rotating body fitted to the output shaft of the one driving device, and the other is driven. The passenger conveyor is characterized in that it is configured to drive the other of the drive rotating bodies via a small rotating body fitted to the output shaft of the driving device.

JP, 2001-130856, A Japanese Unexamined Patent Publication No. 10-109871

  However, the passenger conveyor described in Patent Document 1 can effectively and effectively utilize the arrangement space portion by disposing the pair of driving devices in a distributed manner, but the load of the passengers on the step is If the load is unbalanced due to uneven bias on one side, the shaft that connects the pair of drive devices will be twisted, which may break in the worst case. I had to.

  Therefore, the present invention provides a passenger conveyor that is capable of reducing twist in a shaft connecting drive devices even if a load imbalance occurs.

  In order to solve the above problems, the passenger conveyor according to one aspect of the present invention includes a pair of drive sprockets in which opposing portions are connected by a shaft, and a pair of drive sprockets disposed so as to rotate in the vicinity of the drive sprockets. Drive device, a plurality of steps connected endlessly so as to be moved via a pair of drive sprockets rotated by the drive device, and a control device for controlling the drive device. Further, the control device of the passenger conveyor detects the occurrence of twist of the shaft and controls the drive device so as to correct the occurrence of twist of the shaft.

  Further, the passenger conveyor according to one aspect of the present invention includes a pair of drive sprockets in which opposing portions are connected by shafts, and a pair of drive devices in which the respective drive sprockets are dispersed and arranged in the vicinity of the drive sprockets. And a plurality of steps connected endlessly so as to be moved by a driving device through a driving sprocket that rotates, and a control device for controlling the driving device. Further, the passenger conveyor is provided with a twist generation detector that detects the twist generation of the shaft due to load imbalance, and the drive device is arranged to correct the shaft twist generation when the control device detects the twist generation detector. An adjustment command information output unit for providing adjustment command information to be controlled is provided.

  According to the passenger conveyor which is one embodiment of the present invention, even if a load imbalance occurs, it is possible to reduce the twist in the shaft that connects the drive devices. In addition, problems, configurations, and effects other than those described above will be clarified by the following description of the embodiments.

1 is a schematic configuration diagram showing a passenger conveyor according to an embodiment of the present invention. It is a top view which shows the passenger conveyor shown in FIG. It is a top view which shows the passenger conveyor by the modification 1 of a present Example. It is a top view which shows the passenger conveyor by the modification 2 of a present Example. It is a top view which shows the passenger conveyor by the modification 3 of a present Example. It is a top view which shows the principal part of the passenger conveyor by the modification 4 of a present Example.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a schematic configuration diagram of a passenger conveyor according to an embodiment of the present invention.

  The passenger conveyor includes a frame body 2 including an upper horizontal frame 2a, an intermediate frame 2b and a lower horizontal frame 2c, a drive sprocket 3 arranged in the upper horizontal frame 2a, and a driven sprocket 4 arranged in the lower horizontal frame 2c. A step chain 5 for connecting the driven sprocket 4 so that the driven sprocket 4 rotates in conjunction with the rotation of the drive sprocket 3; a plurality of steps 6 endlessly connected to the step chain 5; Upright balustrade panel 7 and skirt guard 8, moving handrail 9 guided by a guide rail (not shown) provided on balustrade panel 7 to run in synchronization with step 6, and drive sprocket 3 in upper horizontal frame 2a. It is configured by including a control device 10 and an inverter device 11 arranged in the vicinity of. FIG. 2 is a plan view showing the vicinity of the drive sprocket 3 described above.

  The drive sprocket 3 described above has a common shaft 12 whose central axis is arranged in the width direction of the step 6 and a pair of drive sprockets 3a and 3b which are arranged at both ends of the shaft 12 in the axial direction. The opposing sides of the pair of drive sprockets 3a and 3b are connected by. A pair of drive devices 13a and 13b each including a motor are dispersedly arranged near each drive sprocket 3a and 3b, and the drive device 13a rotationally drives the drive sprocket 3a, and the drive device 13b drives the drive sprocket 3b. It is configured to be rotationally driven. A step chain 5 is hung on each of the drive sprockets 3a and 3b. The drive device 13a is controlled by the control device 10 through the inverter device 11a, and the drive device 13b is controlled by the control device 10 through the inverter device 11b.

  Torsion generation detectors, such as strain gauges 14a and 14b, for detecting the generation of torsion of the shaft 12 due to load imbalance are attached to the ends of the shaft 12 on the side of connection with the drive sprockets 3a and 3b, respectively. The strain gauges 14a and 14b may be provided one at each end of the coupling side, or a plurality of strain gauges 14a and 14b may be provided near the circumferential or axial direction of the shaft 12.

  The control device 10 takes in the detection information of the strain gauges 14a and 14b in addition to the load information (load current) in the motors of the drive devices 13a and 13b from the two inverter devices 11a and 11b. The control device 10 has an unbalance generation detection unit 10a that detects that a difference of a set value or more has occurred between the detected values of the strain gauges 14a and 14b. The unbalance occurrence detection unit 10a receives the detection information from the strain gauge 14 and determines the presence or absence of the imbalance based on the detection information. For example, the imbalance occurrence detection unit 10a compares the detected values of the strain gauge 14a and the strain gauge 14b, and if the difference is equal to or more than the set value, it is determined that the imbalance has occurred. When the control device 10 determines that the unbalance generation detection unit 10a has generated an unbalance of a predetermined value or more on the shaft 12, the control device 10 fetches load information such as load currents in the motors of the drive devices 13a and 13b and performs unbalance. It has a calculation unit 10b that calculates adjustment command information such as drive torque for correcting balance. When receiving the notification from the unbalance occurrence detection unit 10a, the calculation unit 10b takes in the operation information of the drive device 13 and generates the adjustment information necessary for correcting the unbalance.

  The control device 10 includes an adjustment command information output unit 10c that corrects the imbalance of the shaft 12 by applying the adjustment command information in the calculation unit 10b to the motors of the drive devices 13a and 13b from the inverter devices 11a and 11b.

  That is, the control device 10 obtains information about the state of the shaft 12 rotated by the plurality of drive devices from the sensor, and when the shaft is twisted, issues a command to the plurality of drive devices to cancel the twist.

  For example, a passenger riding on step 6 is biased to one side, so that a tension difference is generated in the step chain 5 connected to step 6, and a torsional displacement is generated in the shaft 12 due to the load imbalance between the drive sprockets 3a and 3b. And

  At this time, in the unbalance generation detection unit 10a of the control device 10 that has acquired the detection information of the strain gauges 14a and 14b, a difference of a set value or more occurs between the detection values of the strain gauges 14a and 14b. Suppose that you have determined that In this case, the calculation unit 10b of the control device 10 acquires the load information such as the load current in the motors of the drive devices 13a and 13b and calculates the adjustment command information for correcting the shaft twist. The adjustment command information in the arithmetic unit 10b is given from the adjustment command information output unit 10c of the control device 10 to the motors of the drive devices 13a and 13b through the inverter devices 11a and 11b. Therefore, the load current in the motors of the drive devices 13a and 13b is adjusted, and the imbalance generated in the shaft 12 is suppressed.

  According to such a passenger conveyor, the drive sprockets 3a and 3b are arranged at both ends of the shaft 12, and the drive devices 13a and 13b are arranged in the vicinity of each drive sprocket in a distributed manner. The drive devices 13a and 13b can be smaller than the device. Therefore, it is possible to effectively and effectively utilize the space portion in the frame body 2 to arrange the relatively small drive devices 13a and 13b, thereby achieving space saving. Further, since the pair of drive sprockets 3a and 3b are connected by the shaft 12, it is possible to synchronize the phases of both drive sprockets 3a and 3b during rotation.

  However, since the pair of drive sprockets 3a and 3b are connected to each other by the shaft 12, if the passenger rides on the step 6 in a biased manner, the shaft 12 is twisted and displaced. However, as described above, when this type of twisting occurs in the shaft 12, the controller 10 adjusts the load current in the motors of the drive devices 13a and 13b by taking advantage of the features of the drive devices 13a and 13b that are distributed. Therefore, the torsional displacement generated in the shaft 12 can be suppressed. Therefore, the shaft 12 that connects the drive sprockets 3a and 3b can be made small and lightweight.

  FIG. 3 is a plan view showing the passenger conveyor according to the first modification of the present embodiment.

  The same parts as those of the previous embodiment are designated by the same reference numerals, detailed description thereof will be omitted, and only different parts will be described. A torque sensor 15, which is a torsion generation detector, is provided at an axially intermediate portion of the shaft 12 that connects the pair of drive sprockets 3a and 3b.

  The control device 10 takes in the detection information of the torque sensor 15 in addition to the load information (load current) in the motors of the drive devices 13a and 13b from the two inverter devices 11a and 11b, as in the case of the previous embodiment. There is. The control device 10 includes an unbalance occurrence detection unit 10a, and when the unbalance occurrence detection unit 10a receives the detection value of the torque sensor 15, the unbalance occurrence detection unit 10a detects whether or not the detection value is equal to or greater than a set value. The control device 10 includes a calculation unit 10b, and when the unbalance occurrence detection unit 10a determines that the shaft 12 has an unbalance greater than or equal to a predetermined value, the control device 10 determines the load current in the motors of the drive devices 13a and 13b. Load information is taken in to calculate adjustment command information that corrects the imbalance. The control device 10 includes an adjustment command information output unit 10c, and the adjustment command information output unit 10c corrects the imbalance of the shaft 12 by applying the adjustment command information to the motors of the drive devices 13a and 13b from the inverter devices 11a and 11b. Outputs adjustment command information.

  For example, it is assumed that the load on both drive sprockets 3a and 3b is unbalanced and the torsion torque is generated on the shaft 12 because the passenger riding on step 6 is biased to one side.

  At this time, it is assumed that the unbalance occurrence detection unit 10a of the control device 10 that has acquired the detection information of the torque sensor 15 determines that the detection value of the torque sensor 15 exceeds a predetermined set value. In this case, the calculation unit 10b of the control device 10 takes in load information such as load current in the motors of the drive devices 13a and 13b and calculates adjustment command information for suppressing the shaft torque. The adjustment command information in the arithmetic unit 10b is given from the adjustment command information output unit 10c of the control device 10 to the motors of the drive devices 13a and 13b through the inverter devices 11a and 11b. Therefore, the load current in the motors of the drive devices 13a and 13b is adjusted, and the torsion torque of the shaft 12 is suppressed.

  According to such a passenger conveyor, since the pair of drive sprockets 3a and 3b are connected by the shaft 12, if the passenger is biased on step 6, the shaft 12 is twisted. However, as described above, when the torque sensor 15 detects that this kind of torsional torque is generated in the shaft 12, the control device 10 controls the drive device 13a by utilizing the features of the drive devices 13a and 13b arranged in a distributed manner. , 13b, the load currents of the motors are adjusted to suppress the torsion torque generated in the shaft 12. Therefore, the shaft 12 that connects the drive sprockets 3a and 3b can be made small and lightweight.

  FIG. 4 is a plan view showing a passenger conveyor according to the second modification.

  The same parts as those of the previous embodiment are designated by the same reference numerals, detailed description thereof will be omitted, and only different parts will be described. In the embodiment shown in FIG. 3, the torque sensor 15 is provided on the shaft 12 that connects the pair of drive sprockets 3a and 3b, but in the present embodiment, the connecting portion of the shaft 12 on either one of the drive sprockets 3a and 3b. A torque sensor 16 which is a torsion generation detector is provided in the vicinity.

  The control device 10 takes in the detection information of the torque sensor 16 in addition to the load information (load current) in the motors of the drive devices 13a and 13b from the two inverter devices 11a and 11b, as in the case of the previous embodiment. There is. The control device 10 detects an unbalance occurrence detection unit 10a that detects that the detected value of the torque sensor 16 is equal to or more than a set value, and the unbalance occurrence detection unit generates a torsion torque of a predetermined value or more on the shaft 12. When it is determined that the load information such as the load currents in the motors of the drive devices 13a and 13b is taken in to calculate the adjustment command information for correcting the imbalance, and the adjustment command information in the calculation unit is converted to the inverter device 11a, An adjustment command information output unit 10c for correcting the imbalance by providing the motors of the driving devices 13a and 13b from 11b is provided.

  For example, it is assumed that the load on both drive sprockets 3a and 3b is unbalanced and the torsion torque is generated on the shaft 12 because the passenger riding on step 6 is biased to one side.

  At this time, the torsion torque of the shaft 12 is detected by the torque sensor 16 arranged near the connecting portion of the shaft 12 in the drive sprocket 3a. At this time, it is assumed that the unbalance occurrence detection unit 10a of the control device 10 that has acquired the detection information of the torque sensor 16 determines that the detection value of the torque sensor 16 exceeds a predetermined set value. In this case, the calculation unit 10b of the control device 10 takes in load information such as load current in the motors of the drive devices 13a and 13b and calculates adjustment command information for suppressing the shaft torque. The adjustment command information in the arithmetic unit 10b is given from the adjustment command information output unit 10c of the control device 10 to the motors of the drive devices 13a and 13b through the inverter devices 11a and 11b. Therefore, the load current in the motors of the drive devices 13a and 13b is adjusted, and the torsion torque of the shaft 12 is suppressed.

  According to such a passenger conveyor, since the pair of drive sprockets 3a and 3b are connected by the shaft 12, if the passenger is biased on step 6, the shaft 12 is twisted. However, as described above, when it is detected by the torque sensor 16 that this kind of torsional torque is generated in the vicinity of the connecting portion of the shaft 12 of either one of the drive sprockets 3a, 3b, the drive devices 13a, which are arranged in a distributed manner, By utilizing the features of 13b, the control device 10 can control the load current in the motors of the drive devices 13a and 13b, and suppress the twist generated in the shaft 12. Therefore, the shaft 12 that connects the drive sprockets 3a and 3b can be made small and lightweight.

  FIG. 5 is a plan view showing a passenger conveyor according to a modified example 3 of the present embodiment.

  The same parts as those of the previous embodiment are designated by the same reference numerals, detailed description thereof will be omitted, and only different parts will be described. In the embodiment shown in FIG. 3, the torque sensor 15 is provided on the shaft 12 that connects the pair of drive sprockets 3a and 3b. However, in the present embodiment, a torque sensor is provided at the opposing portion of both drive sprockets 3a and 3b. A laser emitting section 17a and a laser receiving section 17b are provided respectively. When the twist of the shaft 12 is in the initial state, the irradiation light from the laser emitting unit 17a is received by the laser receiving unit 17b, while when the twist of the shaft 12 exceeds a predetermined value, the irradiation light from the laser emitting unit 17a is received. Are prevented from being received by the laser receiving portion 17b.

  The control device 10 is similar to the case of the previous embodiment, in addition to the load information (load current) in the motors of the drive devices 13a and 13b from the two inverter devices 11a and 11b, the laser light emitting portion 17a and the laser light receiving portion 17b. Incorporates detection information from. The control device 10 includes an imbalance occurrence detection unit 10a that detects that the irradiation light from the laser emission unit 17a is not received by the laser light reception unit 17b, and the imbalance occurrence detection unit 10a causes an imbalance of a predetermined value or more on the shaft 12. When it is determined that the error has occurred, the calculation unit 10b that fetches load information such as load current in the motors of the driving devices 13a and 13b to calculate the adjustment command information that corrects the imbalance, and the adjustment command information in the calculation unit. It is provided with an adjustment command information output unit 10c and the like for applying the motors of the drive devices 13a and 13b from the inverter devices 11a and 11b to correct the imbalance.

  For example, it is assumed that an unbalanced load occurs on both drive sprockets 3a and 3b because the passengers riding in step 6 are biased to one side.

  At this time, the imbalance generated on the shaft 12 is detected because the irradiation light from the laser emitting section 17a is not received by the laser receiving section 17b. At this time, it is assumed that the imbalance occurrence detection unit of the control device 10 that has received the detection information of the laser light emitting unit 17a and the laser light receiving unit 17b determines that the detection value of the laser light receiving unit 17b exceeds a predetermined set value. . In this case, the calculation unit of the control device 10 acquires the load information such as the load current in the motors of the drive devices 13a and 13b and calculates the adjustment command information that suppresses the imbalance. The adjustment command information in the calculation unit is given from the adjustment command information output unit 10c of the control device 10 to the motors of the drive devices 13a and 13b through the inverter devices 11a and 11b. Therefore, the load current in the motors of the drive devices 13a and 13b is adjusted, and the imbalance of the shaft 12 is suppressed.

  According to such a passenger conveyor, since the pair of drive sprockets 3a and 3b are connected by the shaft 12, if the passenger is biased on step 6, the shaft 12 is twisted. However, as described above, when it is detected by the laser emitting section 17a and the laser receiving section 17b that this kind of imbalance occurs in the shaft 12, the control is performed by utilizing the characteristics of the drive devices 13a and 13b arranged in a distributed manner. The load current in the motors of the drive devices 13a and 13b is adjusted by the device 10 and the imbalance generated in the shaft 12 can be suppressed. Therefore, the shaft 12 that connects the drive sprockets 3a and 3b can be made small and lightweight.

  FIG. 6 is a plan view showing a passenger conveyor according to a modified example 4 of the present embodiment.

  The same parts as those of the previous embodiment are designated by the same reference numerals, detailed description thereof will be omitted, and only different parts will be described. Rotary encoders 18a and 18b for detecting the amount of rotation are provided near the axial end of the shaft 12 that connects the pair of drive sprockets 3a and 3b.

  The control device 10 outputs the detection information of the rotary encoders 18a and 18b in addition to the load information (load current) in the motors of the drive devices 13a and 13b from the two inverter devices 11a and 11b, as in the case of the previous embodiment. I am capturing. The control device 10 detects an unbalance occurrence detection unit 10a that detects that the difference between the detection values of the rotary encoders 18a and 18b is equal to or greater than a set value, and the unbalance occurrence detection unit 10a causes the shaft 12 to detect an unbalance above a predetermined value. When it is determined that the balance is occurring, a calculation unit 10b that fetches load information such as load current in the motors of the drive devices 13a and 13b to calculate adjustment command information that corrects the imbalance, and an adjustment command in the calculation unit 10b. An adjustment command information output unit 10c for correcting the unbalance of the shaft 12 by giving information to the motors of the driving devices 13a, 13b from the inverter devices 11a, 11b is provided.

  For example, it is assumed that the load on both drive sprockets 3a and 3b is unbalanced and the torsion torque is generated on the shaft 12 because the passenger riding on step 6 is biased to one side.

  At this time, it is determined that the unbalance occurrence detection unit 10a of the control device 10 that has received the detection information of the rotary encoders 18a and 18b determines that the difference between the detection values of the rotary encoders 18a and 18b exceeds a predetermined set value. To do. In this case, the calculation unit 10b of the control device 10 takes in load information such as load current in the motors of the drive devices 13a and 13b and calculates adjustment command information for suppressing the shaft torque. The adjustment command information in the arithmetic unit 10b is given from the adjustment command information output unit 10c of the control device 10 to the motors of the drive devices 13a and 13b through the inverter devices 11a and 11b. Therefore, the load current in the motors of the drive devices 13a and 13b is adjusted, and the torsion torque of the shaft 12 is suppressed.

  According to such a passenger conveyor, since the pair of drive sprockets 3a and 3b are connected by the shaft 12, if the passenger is biased on step 6, the shaft 12 is twisted. However, as described above, when it is detected by the rotary encoders 18a and 18b that this kind of torsion torque is generated in the shaft 12, the control device 10 drives by utilizing the characteristics of the drive devices 13a and 13b that are distributed. The load current in the motors of the devices 13a and 13b can be adjusted to suppress the torsion torque generated in the shaft 12. Therefore, the shaft 12 that connects the drive sprockets 3a and 3b can be made small and lightweight.

  According to the passenger conveyors of the respective embodiments described above, it is possible to reduce the twist generated in the shaft 12 connecting the dispersed drive sprockets 3a and 3b, and thus the shaft 12 can be made small and lightweight. Further, in a steady state, if torque is generated that exceeds the fatigue limit of the shaft material before the shaft 12 is damaged, the passenger conveyor may be stopped and inspection or component replacement may be performed to enhance safety.

  It should be noted that the present invention is not limited to the above-described embodiments, but includes various modifications. For example, the above-described embodiments have been described in detail in order to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Further, it is possible to add, delete, or replace other configurations with respect to a part of the configurations of the respective embodiments.

2 frame 3 drive sprocket 3a, 3b drive sprocket 5 step chain 6 step 10 control device 10a unbalance occurrence detection part 10b calculation part 10c adjustment command information output part 11a, 11b inverter device 12 shaft 13a, 13b drive device 14a, 14b strain Gauge 15 Torque sensor 17a Laser emitting part 17b Laser receiving parts 18a, 18b Rotary encoder

Claims (5)

A pair of drive sprockets connecting opposite parts by shafts, a pair of drive devices arranged in the vicinity of each drive sprocket in a dispersed manner so as to rotate the drive sprockets, respectively, and a pair of the drive devices rotated by the drive device. In a passenger conveyor provided with a plurality of steps connected endlessly so as to be moved via a drive sprocket, and a control device for controlling the pair of drive devices,
A first inverter device connected to one of the driving devices, a second inverter device connected to the other of the driving devices, and a torsion generation detector for detecting torsion generation of the shaft due to load imbalance. ,
When the control device determines that an imbalance has occurred by the unbalance occurrence detection unit that detects the occurrence of imbalance by taking in the detection information from the torsion occurrence detector, and the unbalance occurrence detection unit, A calculation unit that calculates adjustment command information that corrects the imbalance of the shaft based on the load information of the drive device that is acquired from the first inverter device and the second inverter device, and an adjustment command in the calculation unit. A passenger conveyor, comprising: an adjustment command information section for giving information from the first inverter device and the second inverter device to the pair of drive devices to correct the imbalance of the shaft . The passenger conveyor according to claim 1 , wherein the twist generation detector uses a strain gauge or a torque sensor attached to the shaft. The passenger conveyor according to claim 1 , wherein the twist occurrence detector uses a torque sensor arranged in the vicinity of a connecting portion of the drive sprocket with the shaft.   The passenger conveyor according to claim 1, wherein the twist occurrence detector uses a laser emitting portion and a laser receiving portion arranged at opposing portions of the pair of drive sprockets. The passenger conveyor according to claim 1 , wherein the twist generation detector uses a rotary encoder attached to the shaft.

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