Patent Grant
11148909
The present application is based on PCT filing PCT/JP2017/021977, filed Jun. 14, 2017, the entire contents of which are incorporated herein by reference.
The present invention relates to a passenger-conveyor step-chain monitoring system.
For example, PTL 1 discloses a passenger-conveyor step-chain monitoring system. According to the monitoring system, it is possible to monitor elongation of a step chain.
However, in the monitoring system described in PTL 1, it is necessary to newly provide an additional sensor. Accordingly, a cost for monitoring elongation of a step chain is increased.
The present invention has been made to solve the above-described problem. An object of the present invention is to provide a passenger-conveyor step-chain monitoring system capable of monitoring elongation of a step chain without adding a special device.
A passenger-conveyor step-chain monitoring system according to the present invention includes a monitoring unit configured to monitor elongation of a step chain attached to a step of a passenger conveyor based on a result of detecting the step by a sensor provided to detect an absence of the step.
According to the present invention, elongation of a step chain is monitored based on a result of detecting a step by a sensor provided to detect an absence of a passenger-conveyor step. Accordingly, it is possible to monitor elongation of a step chain without adding a special device.
Modes for carrying out the present invention will be described with reference to the accompanying drawings. Note that in the drawings, the same or corresponding parts are denoted by the same reference numerals. Redundant descriptions of the parts are simplified or omitted as needed.
The passenger conveyor illustrated in
A plurality of steps 3 is provided between the lower platform 1 and the upper platform 2. The plurality of steps 3 is formed in an endless shape.
A pair of drive rollers 4 is provided to each of the plurality of steps 3. One of the pair of drive rollers 4 is provided on one side of the corresponding step 3. One of the pair of drive rollers 4 is provided on a leading end portion of a tread of the corresponding step 3. The other one of the pair of drive rollers 4 is provided on the other side of the corresponding step 3. The other one of the pair of drive rollers 4 is provided on a leading end portion of a tread of the corresponding step 3.
One of a pair of step chains 5 is provided on one side of the passenger conveyor. One of the pair of step chains 5 is formed in an endless shape. One of the pair of step chains 5 is attached to the vicinity of one of the pair of drive rollers 4 in the plurality of steps 3. The other one of the pair of step chains 5 is provided on the other side of the passenger conveyor. The other one of the pair of step chains 5 is formed in an endless shape. The other one of the pair of step chains 5 is attached to the vicinity of the other one of the pair of drive rollers 4 in the plurality of steps 3.
One of a pair of skirt guards 6 is adjacent to one side of the plurality of steps 3. The other one of the pair of skirt guards 6 is adjacent to the other side of the plurality of steps 3. One of a pair of parapets 7 is fixed to an upper portion of one of the pair of skirt guards 6. The other one of the pair of parapets 7 is fixed to an upper portion of the other one of the pair of skirt guards 6.
One of a pair of guide rails 8 is provided at an upper portion of one of the pair of parapets 7. The other one of the pair of guide rails 8 is provided at an upper portion of the other one of the pair of parapets 7. One of a pair of moving hand rails 9 is formed in an endless shape. One of the pair of moving hand rails 9 is guided to one of the pair of guide rails 8. The other one of the pair of moving hand rails 9 is formed in an endless shape. The other one of the pair of moving hand rails 9 is guided to the other one of the pair of guide rails 8.
An upper sensor 10 is provided at an upper portion of the passenger conveyor. For example, the upper sensor 10 is provided immediately above each of the return-path-side steps 3. The upper sensor 10 is provided to detect an absence of each step 3. A lower sensor 11 is provided at a lower portion of the passenger conveyor. For example, the lower sensor 11 is provided immediately above each of the return-path-side steps 3. The lower sensor 11 is provided to detect an absence of each step 3.
A control device 12 is provided at an upper portion of the passenger conveyor. The control device 12 includes a control unit 12a, a monitoring unit 12b, and a transmission unit 12c.
A monitoring device 13 is provided at a position away from the passenger conveyor. For example, the monitoring device 13 is provided in a control room of the building. For example, the monitoring device 13 is provided in a maintenance company for the passenger conveyor. The monitoring device 13 includes a reception unit 13a, a storage: b, a determination unit 13c, and a prediction unit 13d.
In the control device 12, the control unit 12a drives the step chains 5 to cause the plurality of steps 3 to move in a circulating manner. The monitoring unit 12b monitors elongation of the pair of step chains 5 based on the results of detecting the steps 3 by the upper sensor 10 and the lower sensor 11. The transmission unit 12c transmits information about the monitoring result from the monitoring unit 12b to an external device at a preliminarily set timing. For example, the information about the monitoring result from the monitoring unit 12b is constantly transmitted. For example, the information about the monitoring result from the monitoring unit 12b is periodically transmitted.
In the monitoring device 13, the reception unit 13a receives the information from the transmission unit 12c of the control device 12. The storage unit 13b stores the information received by the reception unit 13a. Based on the information received by the reception unit 13a, the determination unit 13c determines whether the current time corresponds to a replacement period for replacing the step chains 5. The prediction unit 13d predicts the replacement period for replacing the step chains 5 based on the history of the information received by the reception unit 13a.
Thus, each of the control device 12 and the monitoring device 13 functions as a monitoring system.
Next, a method for monitoring elongation of the step chains 5 and a method for determining the replacement period for replacing the step chains 5 will be described with reference to
As illustrated in
The monitoring unit 12b measures a time period A required for the lower sensor 11 to detect the step 3 by using the detection of the step 3 by the upper sensor 10 as a trigger.
As illustrated in
The monitoring unit 12b measures a time period B required for the lower sensor 11 to detect the step 3 by using the detection of the step 3 by the upper sensor 10 as a trigger.
In this case, the monitoring unit 12b determines that the time period corresponding to the length obtained by adding differences (Yn−Xn) between the upper sensor 10 and the lower sensor 11 at each of the plurality of steps 3 corresponds to the difference between the time period A and the time period B.
When the difference reaches a preliminarily set value, the determination unit 13c determines that the current time corresponds to the replacement period for replacing the step chains 5.
Next, an outline of an operation of the control device 12 will be described with reference to
In step S1, the control device 12 determines whether the plurality of steps 3 is moving in a circulating manner. In step S1, if the plurality of steps 3 is not moving in a circulating manner, the control device 12 performs the operation of step S1. If the plurality of steps 3 is moving in a circulating manner in step S1, the control device performs the operation of step S2.
In step S2, the control device 12 monitors elongation of the step chains 5 based on the results of detecting the step 3 by the upper sensor 10 and the lower sensor 11. After that, the control device 12 performs the operation of step S3.
In step S3, the control device 12 transmits information about the monitoring result from the monitoring unit 12b to the external device. After that, the control device 12 performs the operation of step S1.
Next, an outline of the operation of the monitoring device 13 will be described with reference to
In step S11, the monitoring device 13 determines whether the information from the control device 12 is received. In step S11, if the information from the control device 12 is not received, the monitoring device 13 performs the operation of step S11. In step S11, if the information from the control device 12 is received, the monitoring device 13 performs the operation of step S12.
In step S12, the monitoring device 13 stores the information from the control device 12. After that, the monitoring device 13 performs the operation of step S13.
In step S13, the monitoring device 13 determines, based on the information from the control device 12, whether current time corresponds to the replacement period for replacing the step chains 5.
In step S13, if the current time corresponds to the replacement period for replacing the step chains 5, the monitoring device 13 performs the operation of step S14. In step S14, the monitoring device 13 sends, to the external device, information for prompting the replacement of the step chains 5. After that, the monitoring device 13 performs the operation of step S11.
In step S13, if the current time does not correspond to the replacement period for replacing the step chains 5, the monitoring device 13 performs the operation of step S15. In step S15, the monitoring device 13 predicts the replacement period for replacing the step chains 5 based on the history of the stored information. After that, the monitoring device 13 performs the operation of step S11.
According to Embodiment 1 described above, elongation of the step chains 5 is monitored based on the results of detecting the steps 3 by the upper sensor 10 and the lower sensor 11. Accordingly, it is possible to monitor elongation of the step chains 5 without adding a special device.
For example, in European regulations, the installation of a sensor for detecting the absence of the steps 3 is required. Therefore, elongation of the step chains 5 can be monitored using an inexpensive sensor which has a low accuracy and is capable of detecting only the absence of the steps 3.
Further, the information about the monitoring result from the control device 12 is transmitted to the external device. Accordingly, during maintenance work for the passenger conveyor, work for checking elongation of the step chains 5 can be eliminated.
Further, the monitoring device 13 predicts the replacement period for replacing the step chains 5 based on the information about the monitoring result from the control device 12. Accordingly, it is possible to automatically predict elongation of the step chains 5 at a high accuracy. As a result, the replacement of the step chains 5 that requires the passenger conveyor to stop for a long period of time can be planned in advance.
Note that the information stored in the monitoring device 13 may be compared with the content of a verification result from a maintenance company for the passenger conveyor. In this case, the information stored in the monitoring device 13 can be used for future improvement activities.
Further, on one side of the passenger conveyor, a pair of one-side sensors may be provided at upper and lower portions of the passenger conveyor. On the other side of the passenger conveyor, a pair of other-side sensors may be provided at upper and lower portions of the passenger conveyor. In this case, elongation of one of the pair of step chains 5 may be monitored based on the results of detecting the steps 3 by the pair of one-side sensors. Elongation of the other one of the pair of step chains 5 may be monitored based on the results of detecting the steps 3 by the pair of other-side sensors. In this case, a deviation between elongation of one of the pair of step chains 5 and the other one of the pair of step chains 5 can be automatically monitored.
Further, the arrangement of the monitoring unit 12b, the transmission unit 12c, the storage unit 13b, the determination unit 13c, and the prediction unit 13d is not limited. For example, the monitoring unit 12b, the transmission unit 12c, the storage unit 13b, the determination unit 13c, and the prediction unit 13d may be provided in the control device 12. Also, in this case, it is possible to monitor elongation of the step chains 5 without adding a special device.
Next, an example of the control device 12 will be described with reference to
Each function of the control device 12 can be implemented by a processing circuitry. For example, the processing circuitry includes at least one processor 14a and at least one memory 14b. For example, the processing circuitry includes at least one piece of dedicated hardware 15.
If the processing circuitry includes at least one processor 14a and at least one memory 14b, each function of the control device 12 is implemented by software or firmware, or a combination of software and firmware. At least one of software and firmware is described as a program. At least one of software and firmware is stored in at least one memory 14b. At least one processor 14a reads out a program stored in at least one memory 14b and executes the program, thereby implementing each function of the control device 12. At least one processor 14a is also referred to as a central processing unit (CPU), a central processor, a processing device, an arithmetic device, a microprocessor, a microcomputer, or a DSP. For example, at least one memory 14b is a nonvolatile or volatile semiconductor memory, such as a RAM, a ROM, a flash memory, an EPROM, or an EEPROM, a magnetic disc, a flexible disc, an optical disc, a compact disc, a mini disk, a DVD, or the like.
If the processing circuitry includes at least one piece of dedicated hardware 15, the processing circuitry is implemented by, for example, a single circuit, a combined circuit, a programmed processor, a parallel programmed processor, an ASIC, or an FPGA, or a combination thereof. For example, each function of the control device 12 is implemented by a processing circuitry. For example, the functions of the control device 12 are collectively implemented by a processing circuitry.
A part of each function of the control device 12 may be implemented by the dedicated hardware 15, and the other part of each function of the control device 12 may be implemented by software or firmware. For example, the function of the control unit 12a may be implemented using a processing circuitry as the dedicated hardware 15, and functions other than the function of the control unit 12a may be implemented in such a manner that at least one processor 14a reads out a program stored in at least one memory 14b and executes the program.
In this manner, the processing circuitry implements each function of the control device 12 by using the hardware 15, software, or firmware, or a combination thereof.
Although not illustrated, the monitoring device 13 is also implemented by a processing circuitry equivalent to the processing circuitry of the control device 12.
As described above, a passenger-conveyor step-chain monitoring system according to the present invention can be used for a system that monitors elongation of a step chain without adding a special device.
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/JP2017/021977 | 6/14/2017 | WO | 00 |
| Publishing Document | Publishing Date | Country | Kind |
|---|---|---|---|
| WO2018/229901 | 12/20/2018 | WO | A |
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| 5708416 | Zaharia | Jan 1998 | A |
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| 20120043180 | Braasch | Feb 2012 | A1 |
| 20120283870 | Senger | Nov 2012 | A1 |
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| 101353132 | Jan 2009 | CN |
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| Entry |
|---|
| International Search Report and Written Opinion dated Aug. 8, 2017 for PCT/JP2017/021977 filed on Jun. 14, 2017, 9 pages including English Translation of the International Search Report. |
| Notification of Reasons for Refusal received for Japanese Patent Application No. 2018-523839, dated Jun. 5, 2018, 9 pages including English Translation. |
| Notification of Reasons for Refusal received for Japanese Patent Application No. 2018-523839, dated Aug. 14, 2018, 9 pages including English Translation. |
| Notification of Reasons for Refusal received for Japanese Patent Application No. 2018-523839, dated Dec. 4, 2018, 9 pages including English Translation. |
| Office Action dated May 27, 2020 in Chinese Patent Application No. 201780090878.0, 10 pages. |
| Number | Date | Country | |
|---|---|---|---|
| 20200095098 A1 | Mar 2020 | US |
