Platform door device, platform door control method, and platform door control program

Abstract

To provide a technique capable of reducing man-hours required for inspection of a platform door device while maintaining stable operation of the platform door device.SOLUTION: A home door device 100 includes a driving belt connected to a door body, a driving part, a control part, and an information acquisition part 33. The drive unit drives the door body to open and close via the drive belt. The control unit controls the drive unit so as to open and close the door body. The information acquisition unit 33 acquires information on a value related to a driving state of the driving unit when the control unit controls the driving unit to accelerate the door body.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a platform door device, a platform door control method, and a platform door control program. [Background technology]

[0002] In recent years, the installation of platform door devices has been progressing to further improve safety on train platforms (see, for example, Patent Document 1). Platform door devices remain closed until the train enters the platform, restricting passengers from moving from the platform side of the platform door device to the track side. When the train stops at a designated position on the platform, the platform door device opens, allowing passengers to board and disembark the train. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-227162 Summary of the Invention [Problem to be solved by the invention]

[0004] To ensure the normal operation of platform door systems and maintain stable operation, they are inspected regularly. However, there are many items that must be inspected, and inspecting all of them requires a lot of man-hours. For example, in platform door systems that use drive belts, such as the platform door system described in Patent Document 1, checking and adjusting the tension of the drive belt during inspection requires a lot of man-hours. As platform door systems become more widespread, the man-hours required for inspection are increasing.

[0005] In view of the above problems, an object of the present invention is to provide technology that can reduce the labor required to inspect platform door devices while maintaining stable operation of the platform door devices. [Means for solving the problem]

[0006] In order to solve the above problems, a platform door device of one embodiment of the present invention comprises a drive belt connected to a door body, a drive unit that drives the door body to open and close via the drive belt, a control unit that controls the drive unit to drive the door body to open and close, and an information acquisition unit that acquires value information regarding the drive state of the drive unit when the control unit controls the drive unit to accelerate the door body.

[0007] Another aspect of the present invention is a platform door device that includes a drive belt connected to a door body, a drive unit that drives the door body to open and close via the drive belt, a control unit that controls the drive unit to drive the door body to open and close, and an information acquisition unit that acquires information on values ​​related to the drive state of the drive unit when the control unit controls the drive unit to perform a reversing operation on the door body.

[0008] A platform door control method according to one embodiment of the present invention is a method for controlling a platform door device having a drive belt connected to a door body and a drive unit that drives the door body to open and close via the drive belt, and includes the steps of controlling the drive unit to drive the door body to open and close, and acquiring value information relating to the drive state of the drive unit when the drive unit is controlled to accelerate the door body.

[0009] A platform door control program according to one embodiment of the present invention is a platform door control program for controlling a platform door device having a drive belt connected to a door body and a drive unit that drives the door body to open and close via the drive belt, and is a program for causing a computer to execute the steps of controlling the drive unit to drive the door body to open and close, and acquiring value information relating to the drive state of the drive unit when the drive unit is controlled to accelerate the door body.

[0010] A platform door control method according to one embodiment of the present invention is a method for controlling a platform door device that includes a drive belt connected to a door body and a drive unit that drives the door body to open and close via the drive belt, and includes the steps of controlling the drive unit to drive the door body to open and close, and acquiring value information regarding the drive state of the drive unit when the drive unit is controlled to perform a reversing operation on the door body.

[0011] A platform door control program according to one embodiment of the present invention is a platform door control program for controlling a platform door device having a drive belt connected to a door body and a drive unit that drives the door body to open and close via the drive belt, and is a program for causing a computer to execute the steps of controlling the drive unit to drive the door body to open and close, and acquiring value information regarding the drive state of the drive unit when the drive unit is controlled to cause the door body to perform a reversing operation.

[0012] Any combination of the above, or mutual substitution of the components or expressions of the present invention among methods, devices, programs, temporary or non-temporary storage media on which programs are recorded, systems, etc., are also valid aspects of the present invention. [Effects of the Invention]

[0013] According to the present invention, it is possible to reduce the labor required to inspect platform door devices while maintaining stable operation of the platform door devices. [Brief explanation of the drawings]

[0014] [Figure 1] This is a plan view of a station where a platform door device is installed, viewed from above. [Figure 2] FIG. 1 is a block diagram illustrating a platform screen door system. [Figure 3] Figure 3(a) is a front view of the platform door device when the door body is in the fully closed position, and Figure 3(b) is a front view of the platform door device when the door body is in the fully open position. [Figure 4] This is a functional block diagram of the general control panel and platform door device. [Figure 5] 10 is a graph showing an example of a speed transition of a door body during a closing operation. [Figure 6] 10A and 10B are diagrams illustrating an example of a change in speed transition during opening and closing of a door body due to a decrease in tension of a drive belt. [Figure 7] A flowchart showing an example of the operation of the platform door control unit. [Figure 8] 10A and 10B are diagrams illustrating another example of a change in speed transition during opening and closing of the door body due to a decrease in tension of the drive belt. [Figure 9] A flowchart showing another example of the operation of the platform door control unit. DETAILED DESCRIPTION OF THE INVENTION

[0015] Among the embodiments disclosed in this specification, those that are comprised of multiple objects may be integrated, and conversely, those that are comprised of a single object may be separated into multiple objects. Regardless of whether they are integrated, it is sufficient that they are configured to achieve the object of the invention.

[0016] Among the embodiments disclosed in this specification, those in which multiple functions are provided in a distributed manner may have some or all of the multiple functions integrated together, and conversely, those in which multiple functions are provided in a distributed manner may have some or all of the multiple functions integrated together. Regardless of whether the functions are integrated or distributed, it is sufficient that the configuration can achieve the object of the invention.

[0017] Furthermore, separate components that share something in common are distinguished by prefixing their names with "first," "second," etc., and these are omitted when referring to them collectively. Furthermore, terms including ordinal numbers such as "first" and "second" are used to describe various components, but these terms are used only to distinguish one component from another, and do not limit the components.

[0018] The present disclosure will be described below based on preferred embodiments with reference to the drawings. In the embodiments and modified examples, identical or equivalent components and members are designated by the same reference numerals, and redundant explanations will be omitted where appropriate. Furthermore, the dimensions of the members in each drawing are enlarged or reduced as appropriate for ease of understanding. Furthermore, some members that are not important for explaining the embodiments are omitted from the drawings.

[0019] Fig. 1 is a plan view of station 1, as viewed from above, in which platform door devices 100 are installed. As shown in Fig. 1, station 1 is equipped with track 2 on which vehicles 61 (see Fig. 2) run, and platform 3 where passengers of vehicle 61 board and disembark. Multiple platform door devices 100 are installed along the edge of platform 3 on the side of track 2, which is provided along platform E.

[0020] 2 is a block diagram that schematically illustrates the platform screen door system 5. The platform screen door system 5 includes a general control panel 50 and a plurality of platform door devices 100. The platform door devices 100 include a platform door control unit 30.

[0021] A plurality of platform door devices 100 are provided on each of the up and down tracks of platform 3 of station 1. When a vehicle 61 stops at a predetermined position on platform 3, the plurality of platform door devices 100 are respectively arranged at boarding and alighting entrances E (see FIG. 1 ) provided at positions corresponding to each vehicle door of this vehicle 61.

[0022] One general control panel 50 is provided on each platform 3 and is connected to each platform door control unit 30 of the multiple platform door devices 100. The door bodies 11 of the platform door devices 100 are controlled to open and close by the general control panel 50 via the platform door control units 30. The vehicle doors and door bodies 11 open, allowing passengers to board and disembark from the vehicles 61. Passenger boarding and disembarking is restricted by closing either the vehicle doors or the door bodies 11.

[0023] The general control panel 50 and each platform door control unit 30 can communicate with each other. For example, the general control panel 50 transmits to each platform door control unit 30 an open command signal for moving a pair of door bodies 11 open, or a close command signal for moving a pair of door bodies 11 close. When the platform door control unit 30 opens the corresponding door body 11 in response to the open command signal, it transmits a full open signal to the general control panel 50. When the platform door control unit 30 closes the corresponding door body 11 in response to the close command signal, it transmits a full close signal to the general control panel 50.

[0024] The general control panel 50 and the vehicle 61 can communicate with each other via a vehicle information transmission device (ATO: Automatic Train Operation) 63 and a ground coil 62. The vehicle 61 can transmit to the general control panel 50 an open request signal to open the door bodies 11 of all the platform door devices 100 and a close request signal to close the door bodies 11 of all the platform door devices 100. When the general control panel 50 receives a full open signal from all the platform door control units 30, it can transmit a full open confirmation signal to the vehicle 61. Furthermore, when the general control panel 50 receives a full close signal from all the platform door control units 30, it can transmit a full close confirmation signal to the vehicle 61. Note that the vehicle information transmission device 63 and the ground coil 62 may not be provided at some stations 1.

[0025] The operation of the platform screen door system 5 will now be described. When the vehicle 61 reaches a predetermined position on the platform 3 and stops, the ground coil 62 and the vehicle information transmission device 63 transmit a stop signal to the general control panel 50, indicating that the vehicle 61 has stopped. This causes the general control panel 50 to detect that the vehicle 61 has stopped. The driver of the vehicle 61 then transmits an open request signal to the general control panel 50 via the ground coil 62 and the vehicle information transmission device 63. Upon receiving this open request signal, the general control panel 50 supplies an open command signal to each platform door control unit 30. In response to this open command signal, each platform door control unit 30 opens the corresponding door body 11. In response to receiving a fully open position signal (described below) from the fully open position sensor 42 (see FIG. 4), the platform door control unit 30 transmits a fully open signal to the general control panel 50. Upon receiving fully open signals from all platform door control units 30, the general control panel 50 transmits a fully open confirmation signal to the vehicle 61 via the ground coil 63 and the ground coil 62. When the driver of vehicle 61 receives this full-open confirmation signal, he opens the vehicle door.

[0026] When passengers have boarded and disembarked and vehicle 61 is about to depart from platform 3, the crew of vehicle 61 transmits a close request signal to the general control panel 50 via the ground coil 62 and vehicle information transmission device 63. Upon receiving this close request signal, the general control panel 50 supplies a close command signal to each platform door control unit 30. In response to this close command signal, each platform door control unit 30 closes the corresponding door body 11. In response to receiving a fully closed position signal, described below, from a fully closed position sensor 44 (see FIG. 4), the platform door control unit 30 transmits a fully closed signal to the general control panel 50. Upon receiving fully closed signals from all platform door control units 30, the general control panel 50 transmits a fully closed confirmation signal to vehicle 61 via the vehicle information transmission device 63 and ground coil 62. Upon receiving this fully closed confirmation signal, the crew of vehicle 61 closes the vehicle doors. Alternatively, a station attendant may use a station attendant operation panel 66 provided on the platform to transmit a close request signal or an open request signal to the general control panel 50.

[0027] Fig. 3(a) is a front view of the platform door device 100 when the door body 11 is in the fully closed position, and Fig. 3(b) is a front view of the platform door device 100 when the door body 11 is in the fully open position. The platform door device 100 has a pair of door pockets 10, a pair of door bodies 11a and 11b (sometimes collectively referred to as door bodies 11), a pair of drive mechanisms 13 that drive the pair of door bodies 11 to open and close, and a platform door control unit 30.

[0028] The platform door device 100 opens and closes the boarding / alighting entrance E, which is the space between a pair of door pockets 10, by moving the door bodies 11. The platform door device 100 closes the boarding / alighting entrance E by moving the door edges of the door bodies 11 in a direction away from the door pockets 10 and bringing the door edges of the pair of door bodies 11 into contact with each other (see FIG. 3(a))). The platform door device 100 opens the boarding / alighting entrance E by moving the door edges of the door bodies 11 in a direction approaching the door pockets 10 (see FIG. 3(b)).

[0029] The door pockets 10 house the door bodies 11 so that they can move back and forth. When viewed from the front, the door pockets 10 are configured with the opening and closing direction Dx as their longitudinal direction. The door pockets 10 are placed on the platform. Each door pocket 10 is provided with a drive mechanism 13. In addition, one of the pair of door pockets 10 is provided with a platform door control unit 30.

[0030] The drive mechanism 13 is provided on each of the pair of door bodies 11. The drive mechanism 13 is connected to the platform door control unit 30 via a power line (not shown). The drive mechanism 13 includes a motor 13m, a pair of rotating bodies, namely pulleys 13p, a connecting portion 13c, and an encoder 13e (see FIG. 4).

[0031] The pair of pulleys 13p are connected to a motor 13m on both sides in the opening / closing direction Dx and are rotated and driven by the motor 13m. A drive belt 13t is wound around the pair of pulleys 13p. The connecting portion 13c transmits the movement of the drive belt 13t to the door body 11, thereby transmitting the driving force of the motor 13m to the door body 11. The connecting portion 13c is provided, for example, on the trailing edge side of the door body 11. The encoder 13e is a rotary encoder that detects the rotation angle of the motor 13m and provides pulses corresponding to the rotation of the motor 13m.

[0032] The motor 13m is an example of a drive unit that drives the door body 11 to open and close via the drive belt 13t and the connecting unit 13c in accordance with the control of the platform door control unit 30. The drive belt 13t is connected to the door body 11 via the connecting unit 13c.

[0033] Figure 4 is a functional block diagram of the integrated control panel 50 and the platform door device 100. Each functional block shown in Figure 4 and other figures can be realized in hardware terms using electronic elements and mechanical parts, such as a computer CPU, and in software terms using computer programs, but here we will depict functional blocks realized by the cooperation of these. Therefore, it will be understood by those skilled in the art that these functional blocks can be realized in various ways by combining hardware and software.

[0034] The platform door device 100 comprises an opening / closing detection unit 40, a platform door control unit 30, and a drive mechanism 13.

[0035] The general control panel 50 acquires a full-open signal and a full-close signal from the platform door control unit 30. When the general control panel 50 receives an open request signal or a close request signal from a vehicle 61 (see FIG. 2) or a station staff operation panel 66 (see FIG. 2), it transmits an open command signal or a close command signal to the platform door control unit 30. The general control panel 50 transmits a full-open confirmation signal or a full-close confirmation signal to the vehicle information transmission device 63 (see FIG. 2).

[0036] The open / close detection unit 40 includes a fully open position sensor 42 and a fully closed position sensor 44. The fully open position sensor 42 is a sensor that detects whether the door body 11 is positioned in the fully open position, and transmits a fully open position signal indicating that the door body 11 is positioned in the fully open position. The fully closed position sensor 44 is a sensor that detects whether the door body 11 is positioned in the fully closed position, and transmits a fully closed position signal indicating that the door body 11 is positioned in the fully closed position. For example, a magnetic detection type proximity sensor or a photoelectric sensor is used as the fully open position sensor 42 and the fully closed position sensor 44.

[0037] The platform door control unit 30 of this embodiment includes a communication unit 31, a drive control unit 32, an information acquisition unit 33, a deterioration judgment unit 34, a timing determination unit 35, an alarm unit 36, and a memory unit 37.

[0038] The communication unit 31 acquires various signals supplied from the outside. For example, the communication unit 31 receives a fully open position signal or a fully closed position signal from the open / close detection unit 41 and a pulse signal from the encoder 13e. Furthermore, for example, the communication unit 31 communicates with the general control panel 50 via wire or wirelessly, receives an open command signal or a close command signal from the general control panel 50, and transmits predetermined information to the general control panel 50.

[0039] The drive control unit 32 controls the motor 13m to drive the door body 11 to open or close. For example, the drive control unit 32 controls the motor 13m in response to an open command signal or a close command signal received via the communication unit 31 to move each of the door bodies 11 in the opening or closing direction. The drive control unit 32 of this embodiment controls the drive current flowing through the motor 13m to control the drive of the door body 11 in the opening or closing direction.

[0040] An example of the processing in the drive control unit 32 when driving the door body 11 to close will be described with reference to Fig. 5. Fig. 5 is a graph showing an example of the speed transition of the door body 11 during the closing operation. The speed transition in Fig. 5 is also applied to the opening operation. The drive control unit 32 controls the speed of the door body 11 during the closing operation via the motor 13m and the drive belt 13t.

[0041] As shown in FIG. 5, upon receiving a close command signal, the drive control unit 32 controls the motor 13m to accelerate the door element 11, which is stopped at the initial position (fully open position), maintain that speed when it reaches a predetermined first speed, begin deceleration when it reaches a predetermined position where deceleration begins, maintain that speed when it decelerates to a predetermined second speed, and stop the door element 11 in that state when it reaches the fully open position. That is, the closing operation of this embodiment includes an acceleration control operation that accelerates the door element 11, which is stopped at the fully open position, to the predetermined first speed, a high-speed control operation that maintains the first speed, a deceleration control operation that decelerates to the second speed, and a low-speed control operation that maintains the second speed until the door element 11 reaches the fully closed position. Control parameters such as the first speed, the second speed, and the deceleration start position can be set by experiment or simulation based on the specifications of the platform door device 100. Hereinafter, the drive control unit 32 will also be simply referred to as the "control unit."

[0042] Returning to the explanation of FIG. 4, the information acquisition unit 33 acquires value information relating to the driving state of the motor 13m when the drive control unit 32 controls the motor 13m to drive the door element 11 to open or close. The value information relating to the driving state of the motor 13m is value information calculated by the information acquisition unit 33 based on pulse signals from the encoder 13e acquired via the communication unit 31. The value information relating to the driving state of the motor 13m may be, for example, information on the position of the door element 11, the moving speed of the door element 11, or the acceleration of the door element 11. The moving speed of the door element 11 can be calculated from the number of pulse signals from the encoder 13e. The position of the door element 11 can be calculated by integrating the calculated moving speed of the door element 11 with respect to time. The acceleration of the door element 11 can be calculated by differentiating the calculated moving speed of the door element 11 with respect to time.

[0043] Instead of or in addition to the pulse signal of the encoder 13e, the information acquiring unit 33 may acquire at least one of the drive current and applied voltage of the motor 13m controlled by the drive control unit 32 and actual measured values ​​of the current and voltage of the motor 13m. Then, the information acquiring unit 33 may calculate information on values ​​relating to the driving state of the motor 13m based on the acquired values.

[0044] In this way, the information acquisition unit 33 can acquire information about values ​​relating to the driving state of the motor 13m based on information that can normally be acquired by the platform door device 100, such as the pulse signal from the encoder 13e, the control information of the drive control unit 32, and the actual measured values ​​of the current and voltage of the motor 13m. Therefore, the platform door device 100 of this embodiment does not need to be equipped with a dedicated sensor or the like, which prevents the platform door device 100 from becoming more complicated and eliminates the need to inspect or adjust the dedicated sensor, which is effective in reducing maintenance costs.

[0045] The deterioration determining unit 34 determines that the drive belt 13t has deteriorated when the information acquired by the information acquiring unit 33 has changed from the reference value by a threshold value or more. The determination by the deterioration determining unit 34 will be described in detail later.

[0046] The timing determination unit 35 determines the timing for the deterioration determination unit 34 to execute the determination process. The timing determination unit 35 determines the timing for the deterioration determination unit 34 to execute the determination process after a predetermined period of time has elapsed since the deterioration determination unit 34 last executed the determination process. For example, the timing determination unit 35 may determine the timing for the deterioration determination unit 34 to execute the determination process when the use of the platform door device 100 begins in a day, i.e., when station 1 opens for business, and may determine the timing for the deterioration determination unit 34 to execute the determination process when the use of the platform door device 100 ends, i.e., when station 1 closes for business. The timing determination unit 35 may determine the timing for the deterioration determination unit 34 to execute the determination process based on elapsed time, or may determine the timing for the deterioration determination unit 34 to execute the determination process each time the drive control unit 32 controls the opening and closing drive of the door body 11 a predetermined number of times. In this way, by having the deterioration determination unit 34 execute the determination process at time intervals, power consumption is reduced compared to when the determination process is executed more frequently, and it is easier to grasp changes since the previous determination process.

[0047] Similarly to the above, the timing determination unit 35 may determine the timing at which the information acquisition unit 33 acquires the information on the value related to the driving state of the motor 13 m. This allows the information acquisition unit 33 to acquire the information on the value related to the driving state of the motor 13 m at time intervals, thereby saving more power than when the information is acquired more frequently.

[0048] The timing determination unit 35 may determine the timing of control of the motor 13m by the drive control unit 32. As a result, the drive control unit 32 of this embodiment can perform an inspection operation to control the motor 13m at a timing determined by the timing determination unit 35, in addition to a normal operation of controlling the motor 13m in response to an open command signal or a close command signal. When the drive control unit 32 performs an inspection operation, the information acquisition unit 33 may acquire information and the deterioration determination unit 34 may perform determination processing only when the drive control unit 32 performs the inspection operation. The timing of control of the motor 13m by the drive control unit 32 determined by the timing determination unit 35 may be, for example, at night or early in the morning when trains are not running.

[0049] The notification unit 36 ​​issues a notification when the deterioration determination unit 34 determines that the drive belt 13t has deteriorated. The form of the notification unit 36 ​​is not particularly limited, and may be, for example, a speaker, a patrol lamp, or the like installed in the platform door device 100, or a speaker, a patrol lamp, or the like installed in the general control panel 50. By the notification unit 36 ​​issuing a notification, it is possible to notify those around at an early stage of deterioration of the drive belt 13t.

[0050] The storage unit 37 stores various types of information, control programs, etc. used by the platform door control unit 30. The information stored in the storage unit 37 includes, for example, reference values ​​and threshold values ​​used in the determination process by the deterioration determination unit 34, and information on a predetermined period used by the timing determination unit 35. The storage unit 37 includes, for example, a non-volatile memory.

[0051] As described above, the drive control unit 32 controls the speed of the door body 11 during the closing operation, and ideally the speed of the door body 11 changes as shown in the graph in Fig. 5. However, if the tension of the drive belt 13t decreases due to deterioration of the drive belt 13t, the speed change of the door body 11 may differ from that shown in the graph in Fig. 5.

[0052] Fig. 6 is a diagram showing an example of a change in the speed transition during the opening and closing operation of the door body 11 due to a decrease in the tension of the drive belt 13t. As shown in Fig. 6, when the tension of the drive belt 13t is not decreased, the speed of the door body 11 increases at a constant angle with respect to time during the acceleration control operation, as shown by the solid line, which is ideal control. On the other hand, as the tension of the drive belt 13t decreases, the speed of the door body 11 tends to first accelerate sharply, then decelerate once, and then accelerate again during the acceleration control operation.

[0053] This change in speed transition due to a decrease in tension of the drive belt 13t can be explained, for example, as follows. That is, as the tension of the drive belt 13t decreases, the drive belt 13t exerts almost no resistance to the rotation of the motor 13m in the initial stage of the acceleration control operation, and therefore the rotation speed of the motor 13m is likely to be higher than the expected rotation speed. At this time, the drive belt 13t is bent. When the pair of pulleys 13p are rotated by the motor 13m to a certain extent, the bend in the drive belt 13t is eliminated, and the drive belt 13t exerts resistance to the rotation of the motor 13m, so the rotation speed of the motor 13m is likely to temporarily decrease. Thereafter, the rotational force of the motor 13m is transmitted to the door member 11 via the pair of pulleys 13p and the drive belt 13t. When the door member 11 starts to open or close, the rotation speed of the motor 13m gradually stabilizes and accelerates again. The information on the speed of the door body 11 acquired by the information acquisition unit 33 is information calculated based on the rotational speed of the motor 13m, so as mentioned above, the lower the tension of the drive belt 13t, the stronger the tendency is for the door body 11 to first accelerate rapidly, then decelerate once, and then accelerate again during acceleration control operation.

[0054] The deterioration determination unit 34 of this embodiment can determine deterioration of the drive belt 13t using information on the driving state of the motor 13m during the acceleration control operation. Specifically, considering that the door door 11 rapidly accelerates at the beginning of the acceleration control operation when the tension of the drive belt 13t decreases, the deterioration determination unit 34 may determine that the drive belt 13t has deteriorated if the acceleration of the door door 11 acquired by the information acquisition unit 33 increases by a threshold or more from a reference value. Also, considering that the door door 11 decelerates once during the acceleration control operation when the tension of the drive belt 13t decreases, the deterioration determination unit 34 may determine that the drive belt 13t has deteriorated if the acceleration of the door door 11 acquired by the information acquisition unit 33 decreases by a threshold or more from a reference value. Also, the deterioration determination unit 34 may determine that the drive belt 13t has deteriorated if the timing of the decrease in the acceleration of the door door 11 acquired by the information acquisition unit 33 changes from the reference value by a threshold or more, for example, if the timing is earlier or later than the reference value by a threshold or more. This is effective when it is easier to detect a change in the timing of a decrease in acceleration of the door body 11 acquired by the information acquisition unit 33 than to detect an increase or decrease in the acceleration.

[0055] As shown in FIG. 6, even after the transition from acceleration control to high-speed control, the speed transition of the door element 11 differs depending on whether the tension of the drive belt 13t is reduced or not. Specifically, during high-speed control, the speed of the door element 11 is constant when the tension of the drive belt 13t is not reduced. On the other hand, during high-speed control, the more the tension of the drive belt 13t is reduced, the longer it takes for the speed to converge to the target speed. Therefore, the deterioration determination unit 34 may determine the deterioration of the drive belt 13t based on, for example, the time it takes for the speed of the door element 11 acquired by the information acquisition unit 33 to fall within a predetermined range.

[0056] The tension of the drive belt 13t is, for example, 200N at the reference value when it is not deteriorated, and is, for example, 150N at the deteriorated value.

[0057] 7 is a flowchart showing an example of the operation of the platform door control unit 30. If it is time for the deterioration determination unit 34 to execute the determination process (Y in S10), the platform door control unit 30 proceeds to step S12, and if it is not time for the deterioration determination unit 34 to execute the determination process (N in S10), the processing ends. The timing for the execution of the determination process by the deterioration determination unit 34 may be the timing determined by the timing determination unit 35, for example.

[0058] In step S12, the information acquisition unit 33 waits until the drive control unit 32 is executing the acceleration control operation of the door body 11. When the acceleration control operation is in progress (Y in S12), the information acquisition unit 33 acquires information on values ​​related to the driving state of the motor 13m (S14).

[0059] The deterioration determination unit 34 determines whether the information acquired by the information acquisition unit 33 has changed from the reference value by a threshold value or more (S16). If the change is by the threshold value or more (Y in S16), the deterioration determination unit 34 determines that the drive belt 13t has deteriorated (S18). On the other hand, if the change is not by the threshold value or more (N in S16), the process ends.

[0060] After step S18, the notification unit 36 ​​issues a notification (S20), and the process ends.

[0061] As described above, in this embodiment, the information acquisition unit 33 acquires information about values ​​relating to the driving state of the motor 13m when the drive control unit 32 controls the motor 13m to accelerate the door body 11. The information about values ​​relating to the driving state of the motor 13m shows different trends depending on the decrease in tension of the drive belt 13t, so it is possible to grasp the decrease in tension of the drive belt 13t without providing a dedicated sensor or the like.

[0062] In this embodiment, the deterioration determination unit 34 determines that the drive belt 13t has deteriorated when the information acquired by the information acquisition unit 33 has changed from the reference value by a threshold value or more. This makes it possible to more clearly grasp the decrease in tension of the drive belt 13t without providing a dedicated sensor or the like.

[0063] Fig. 8 is a diagram showing another example of a change in the speed transition during the opening and closing operation of the door body 11 due to a decrease in tension of the drive belt 13t. Fig. 8 shows an example in which, while the drive control unit 32 is performing, for example, a closing operation on the door body 11, the drive control unit 32 reverses the door body 11 due to contact with an obstacle or the like, and transitions to, for example, an opening operation. In Fig. 8, all speeds on the vertical axis are shown in the positive direction, but the direction of movement of the door body 11 is reversed before and after the point indicated by the white arrow as "start of reversal operation."

[0064] Here, the reversal operation may be an operation performed by the information acquisition unit 33 of this embodiment to acquire information, such as during maintenance and inspection, or it may be an operation that occurs when the platform door device 100 is in operation.

[0065] If the reversal operation is an operation that occurs when pinching is detected, the platform door control unit 30 may further include a door pinch determination unit (not shown). The door pinch determination unit determines whether or not a foreign object, such as a person, part of a person, or an object, is pinched between the door edges of the pair of door bodies 11 based on the stopping positions of the pair of door bodies 11. The stopping positions of the pair of door bodies 11 can be determined, for example, based on the rotation angle of the encoder 13e of the motor 13m provided on each of the pair of door bodies 11.

[0066] As shown in Figure 8, when the tension of the drive belt 13t is not reduced, the speed of the door body 11 decreases at a constant angle with respect to time when it comes into contact with an obstacle, as shown by the solid line in ideal control. In other words, the door body 11 decelerates at a roughly constant acceleration. After the door body 11 stops, when the reversing operation starts, the door body 11 accelerates at a roughly constant acceleration, and then transitions to a constant speed when it reaches the target speed.

[0067] On the other hand, as the tension of the drive belt 13t decreases, the speed of the door body 11 decreases significantly immediately after the start of deceleration, and then the speed decreases more slowly than in the case of ideal control, and the door body 11 stops. Even after the start of the reversing operation, as the tension of the drive belt 13t decreases, the speed of the door body 11 first accelerates significantly, and then decelerates when it exceeds the target speed, and then accelerates when it becomes lower than the target speed, repeating this operation until it gradually converges to the target speed.

[0068] The change in speed transition due to the decrease in tension of the drive belt 13t can be explained in the same manner as described above with reference to Figure 6. That is, as the tension of the drive belt 13t decreases, the drive belt 13t exerts almost no resistance to the rotation of the motor 13m at the start of deceleration, making it more likely that the rotational speed of the motor 13m will decelerate more rapidly than expected. At this time, the drive belt 13t is bent. Once the pair of pulleys 13p are rotated by the motor 13m to a certain extent, the bend in the drive belt 13t is eliminated, and resistance to the rotation of the motor 13m is exerted by the drive belt 13t, making the decrease in the rotational speed of the motor 13m more gradual. Thereafter, the rotational force of the motor 13m is transmitted to the door element 11 via the pair of pulleys 13p and the drive belt 13t. When the door element 11 begins to open or close, the rotational speed of the motor 13m gradually stabilizes. The same applies after the start of the reversing operation.

[0069] The information acquiring unit 33 may acquire information on the value of the driving state of the motor 13m when the drive control unit 32 controls the motor 13m to reverse the door body 11. In this case, for example, when the drive control unit 32 is driving the door body 11 to close and the door body 11 is reversed due to contact with an obstacle, the information acquiring unit 33 may acquire information on the value of the driving state of the motor 13m from when the drive control unit 32 starts the closing drive to when the drive control unit 32 returns to the closing drive after the reverse operation and the door body 11 is fully closed. The information on the value of the driving state of the motor 13m may be, for example, the time from when the motor 13m starts to decelerate before the reverse operation to when it stops. In this case, the deterioration determining unit 34 may determine that the drive belt 13t has deteriorated if the time acquired by the information acquiring unit 33 has changed from a reference value by more than a threshold value.

[0070] The information on the value relating to the driving state of the motor 13m may be, for example, the speed of the motor 13m from when the motor 13m starts to decelerate until when it stops before the reversing operation. In this case, the deterioration determination unit 34 may determine that the drive belt 13t has deteriorated if the speed acquired by the information acquisition unit 33 has changed from the reference value by more than a threshold value.

[0071] The information about the value of the drive state of the motor 13m may be, for example, the time from when the motor 13m starts accelerating as a reverse operation until it reaches a target speed. The time until it reaches the target speed may be the time until it converges to a speed within a predetermined range including the target speed. In this case, the deterioration determination unit 34 may determine that the drive belt 13t has deteriorated if the time acquired by the information acquisition unit 33 has changed from a reference value by more than a threshold value.

[0072] The information on the value relating to the driving state of the motor 13m may be, for example, the speed after the motor 13m starts accelerating as a reverse operation. In this case, the deterioration determination unit 34 may determine that the drive belt 13t has deteriorated if the speed acquired by the information acquisition unit 33 has changed from the reference value by more than a threshold value.

[0073] Figure 9 is a flowchart showing another example of the operation of the platform door control unit 30. If it is time for the deterioration determination unit 34 to execute the determination process (Y in S30), the platform door control unit 30 proceeds to step S32, and if it is not time for the deterioration determination unit 34 to execute the determination process (N in S30), it terminates the processing. The timing for the deterioration determination unit 34 to execute the determination process may be the timing determined by the timing determination unit 35, for example.

[0074] In step S32, the information acquisition unit 33 waits until the drive control unit 32 controls the door body 11 to reverse. When the reverse control is performed (Y in S32), the information acquisition unit 33 acquires information on values ​​related to the drive state of the motor 13m (S34). Here, the information acquired by the information acquisition unit 33 may be information before the reverse control was performed. In that case, the information acquisition unit 33 may acquire the information before the reverse control was performed from a temporary storage area of ​​the platform door control unit 30.

[0075] Steps S36 to S40 are the same as steps S16 to S20 shown in FIG. 7, and therefore a description thereof will be omitted.

[0076] The above describes in detail examples of embodiments of the present invention. The above-described embodiments merely illustrate specific examples of implementing the present invention. The contents of the embodiments do not limit the technical scope of the present invention, and many design changes, such as changes, additions, and deletions of components, are possible within the scope of the invention as defined in the claims. In the above-described embodiments, content that allows such design changes is described with the notation "in the embodiment" or "in the embodiment," but design changes are also permissible in content that does not have such notation.

[0077] Any combination of the above-described embodiments and modifications is also useful as an embodiment of the present invention. A new embodiment resulting from the combination has the combined effects of the combined embodiments and modifications.

[0078] For example, the door body 11 of this embodiment has been described as a double-swing sliding door that can move in the opening and closing direction Dx from the door pocket 10, but the door body 11 may also be a single-swing door.

[0079] 3 shows an example in which the drive mechanism 13 of this embodiment is installed near the center of the door body 11 in the vertical direction, but the location at which the drive mechanism 13 is installed is not particularly limited. For example, the drive mechanism 13 may be installed below the door body 11, or may be installed above the door body 11 so that the door body 11 is configured as a hanging type.

[0080] Furthermore, in the present embodiment, the drive control unit 32 has been described as starting the reversing operation of the door body 11 after the door body 11 has stopped due to contact with an obstacle, but the conditions under which the drive control unit 32 starts the reversing operation of the door body 11 are not particularly limited. For example, the drive control unit 32 may start the reversing operation of the door body 11 when the moving speed of the door body 11 falls below a certain level. Also, for example, the platform door device 100 may be equipped with an obstacle sensor that detects an obstacle such as a person or object located at the platform door E, and the drive control unit 32 may start the reversing operation of the door body 11 when the obstacle sensor detects an obstacle during the closing operation of the door body 11. In this case, the method of detecting an obstacle using the obstacle sensor is not particularly limited.

[0081] When the timing for the drive control unit 32 to start the reversing operation of the door body 11 is during maintenance and inspection, the reversing operation may be started by the maintenance and inspection worker bringing an obstacle into contact with the door body 11 or by causing the above-mentioned obstacle sensor to enter a detection state while the door body 11 is closing. Alternatively, a control program for controlling the drive control unit 32 to fully open the door body 11, close it for a certain distance or for a certain time, and then reverse the door body 11 to open it again until it is fully open again may be stored in the storage unit 37 in advance, and when the inspection mode is selected by the maintenance and inspection worker, the control program may be executed to cause the drive control unit 32 to start the reversing operation.

[0082] The information acquisition unit 33 may store the acquired information on values ​​relating to the driving state of the motor 13m over time in the storage unit 37. Then, the deterioration determination unit 34 may determine whether or not the motor 13m has deteriorated based on the difference between the information on values ​​relating to the driving state of the motor 13m stored in the storage unit 37 at different times.

[0083] The communication unit 31 may transmit information acquired by the information acquisition unit 33, information stored in the memory unit 37, information related to the determination by the deterioration determination unit 34, etc. to the general control panel 50. The general control panel 50 may then transmit the information received from the communication unit 31 to an external terminal or the like. The communication unit 31 may also communicate with an external terminal or the like via a wired or wireless connection, and may transmit this information directly to the external terminal or the like.

[0084] At least one of the deterioration determination unit 34 and the memory unit 37 does not have to be provided in the platform door control unit 30. For example, at least one of the deterioration determination unit 34 and the memory unit 37 may be provided in the general control panel 50, may be provided as any component of the platform door system 5, or may be provided in an external system capable of communicating with the platform door system 5, such as a station management system.

[0085] Among the embodiments disclosed in this specification, those in which multiple functions are provided in a distributed manner may have some or all of the multiple functions integrated together, and conversely, those in which multiple functions are provided in a distributed manner may have some or all of the multiple functions integrated together. Regardless of whether the functions are integrated or distributed, it is sufficient that the configuration can achieve the object of the invention. [Explanation of symbols]

[0086] 11, 11a, 11b...door body, 13e...encoder, 13m...motor, 13t...drive belt, 32...drive control unit, 33...information acquisition unit, 34...deterioration determination unit, 36...alarm unit, 100...platform door device.

Claims

1. A drive belt connected to the door body; a drive unit that drives the door body to open and close via the drive belt; a control unit that controls the drive unit to drive the door body to open and close; an information acquisition unit that acquires information on values ​​related to the driving state of the drive unit when the control unit controls the drive unit to accelerate the door body; A platform door device equipped with:

2. a deterioration determination unit that determines that the drive belt has deteriorated when the information acquired by the information acquisition unit has changed from a reference value by a threshold value or more; The platform door device according to claim 1.

3. the information acquisition unit acquires the acceleration of the drive unit; the deterioration determining unit determines that the drive belt has deteriorated when the acceleration acquired by the information acquiring unit increases from a reference value by a threshold value or more. The platform door device according to claim 2.

4. the information acquisition unit acquires the acceleration of the drive unit; the deterioration determining unit determines that the drive belt has deteriorated when the acceleration acquired by the information acquiring unit has decreased from a reference value by a threshold value or more. The platform door device according to claim 2.

5. the information acquisition unit acquires the acceleration of the drive unit; the deterioration determining unit determines that the drive belt has deteriorated when the timing at which the acceleration decreases acquired by the information acquiring unit has changed from a reference value by a threshold value or more. The platform door device according to claim 2.

6. The platform door device according to any one of claims 2 to 5, wherein the deterioration determination unit executes the determination process after a predetermined period of time has elapsed since the previous determination process.

7. The platform door device according to any one of claims 2 to 5, further comprising an alarm unit that issues an alarm when the deterioration determination unit determines that the drive belt has deteriorated.

8. A drive belt connected to the door body; a drive unit that drives the door body to open and close via the drive belt; a control unit that controls the drive unit to drive the door body to open and close; an information acquisition unit that acquires information on a value related to a driving state of the drive unit when the control unit controls the drive unit to perform a reverse operation of the door body; A platform door device equipped with:

9. a deterioration determination unit that determines that the drive belt has deteriorated when the information acquired by the information acquisition unit has changed from a reference value by a threshold value or more; The platform door device according to claim 8.

10. the information acquisition unit acquires a time from when the drive unit starts to decelerate until when the drive unit stops before the reversing operation, The deterioration determination unit determines that the drive belt has deteriorated when the time has changed from a reference value by a threshold value or more. The platform door device according to claim 9.

11. the information acquisition unit acquires a speed of the drive unit from when the drive unit starts to decelerate until when the drive unit stops before the reversing operation, The deterioration determination unit determines that the drive belt has deteriorated when the speed has changed from a reference value by a threshold value or more. The platform door device according to claim 9.

12. the information acquisition unit acquires a time from when the drive unit starts accelerating as the reversing operation until when the drive unit reaches a target speed, The deterioration determination unit determines that the drive belt has deteriorated when the time has changed from a reference value by a threshold value or more. The platform door device according to claim 9.

13. the information acquisition unit acquires a speed after the drive unit starts accelerating as the reversing operation, The deterioration determination unit determines that the drive belt has deteriorated when the speed has changed from a reference value by a threshold value or more. The platform door device according to claim 9.

14. The platform door device according to any one of claims 9 to 13, wherein the deterioration determination unit executes the determination process after a predetermined period has elapsed since the previous determination process.

15. The platform door device according to any one of claims 9 to 13, further comprising an alarm unit that issues an alarm when the deterioration determination unit determines that the drive belt has deteriorated.

16. A method for controlling a platform door device including a drive belt connected to a door body and a drive unit that drives the door body to open and close via the drive belt, controlling the drive unit to drive the door body to open and close; acquiring information on a value relating to a driving state of the driving unit when the driving unit is controlled to accelerate the door body; A platform door control method including:

17. A platform door control program for controlling a platform door device including a drive belt connected to a door body and a drive unit that drives the door body to open and close via the drive belt, the program comprising: controlling the drive unit to drive the door body to open and close; acquiring information on a value relating to a driving state of the driving unit when the driving unit is controlled to accelerate the door body; A platform door control program for executing the above.

18. A method for controlling a platform door device including a drive belt connected to a door body and a drive unit that drives the door body to open and close via the drive belt, controlling the drive unit to drive the door body to open and close; acquiring information on a value relating to a driving state of the driving unit when the driving unit is controlled to perform a reverse operation of the door body; A platform door control method including:

19. A platform door control program for controlling a platform door device including a drive belt connected to a door body and a drive unit that drives the door body to open and close via the drive belt, the program comprising: controlling the drive unit to drive the door body to open and close; acquiring information on a value relating to a driving state of the driving unit when the driving unit is controlled to perform a reverse operation of the door body; A platform door control program for executing the above.

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