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

Abstract

To provide a technology capable of determining the deterioration of a stopper that comes into contact with the door of a platform door device. [Solution] The platform door device 100 comprises a drive unit that drives the door to open and close, a stopper that determines the fully open or fully closed position of the door, a position detection unit 40 that detects that the door is in a predetermined position, a movement amount acquisition unit 33 that acquires the amount of movement of the door, and a deterioration determination unit 35 that determines deterioration of the stopper based on the amount of movement of the door acquired by the movement amount acquisition unit 33 and the detection information of the position detection unit 40.

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.

[0003] Platform door devices are required to operate normally in order to maintain stable operation. To ensure normal operation of platform door devices, for example, Patent Document 1 describes a platform door operation abnormality detection system for detecting the occurrence of abnormal operation of platform door devices. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-94299 Summary of the Invention [Problem to be solved by the invention]

[0005] Platform door systems are known that are equipped with stoppers that contact the doors to prevent their movement and thereby determine whether the doors are in a fully open or fully closed state. If such stoppers deteriorate due to wear or other reasons, the doors may be positioned differently from their intended positions when fully open or fully closed. In this case, the normal operation of the platform door system may not be ensured.

[0006] In view of the above problems, an object of the present invention is to provide a technology capable of determining deterioration of a stopper that comes into contact with the door of a platform door device. [Means for solving the problem]

[0007] In order to solve the above problems, a platform door device of one embodiment of the present invention comprises a drive unit that drives the door to open and close, a stopper that determines the fully open position or the fully closed position of the door, a position detection unit that detects that the door is in a predetermined position, a movement amount acquisition unit that acquires the amount of movement of the door, and a deterioration determination unit that determines deterioration of the stopper based on the amount of movement of the door acquired by the movement amount acquisition unit and the detection information of the position detection unit.

[0008] 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 unit that drives the doors to open and close, and a stopper that determines whether the doors are in a fully open or fully closed state, and includes the steps of detecting that the doors are in a predetermined position, acquiring the amount of movement of the doors, and determining deterioration of the stopper based on the acquired amount of movement of the doors and the detected information.

[0009] A platform door control program of one embodiment of the present invention is a program for controlling a platform door device that has a drive unit that drives the doors to open and close, and a stopper that determines the fully open or fully closed position of the doors, and is a program that causes a computer to execute the steps of detecting that the doors are in a predetermined position, acquiring the amount of movement of the doors, and determining deterioration of the stopper based on the acquired amount of movement of the doors and the detected information.

[0010] 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]

[0011] According to the present invention, it is possible to determine the deterioration of the stopper that comes into contact with the door of a platform door device. [Brief explanation of the drawings]

[0012] [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] This is a front view of the platform door device when the doors are fully closed. [Figure 4] This is a front view of the platform door device when the door is fully open. [Figure 5] FIG. 3 is a functional block diagram of the integrated control panel and platform door device shown in FIG. 2. [Figure 6] 6 is a graph showing an example of time changes in first to fourth movement amounts acquired by the movement amount acquisition unit shown in FIG. 5. [Figure 7] 7 is a graph showing another example of time changes in the first to fourth movement amounts acquired by the movement amount acquisition unit shown in FIG. 5. [Figure 8] 6 is a flowchart showing an example of the operation of the platform door control unit shown in FIG. 5. [Figure 9] 7 is a flowchart showing another example of the operation of the platform door control unit shown in FIG. 5. DETAILED DESCRIPTION OF THE INVENTION

[0013] 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.

[0014] 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.

[0015] 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.

[0016] 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.

[0017] 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.

[0018] 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.

[0019] 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.

[0020] 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 opening and closing of the doors 11 of the platform door devices 100 is controlled by the general control panel 50 via the platform door control unit 30. The opening of the vehicle doors and the doors 11 allows passengers to board and disembark from the vehicle 61. The closing of either the vehicle doors or the doors 11 restricts passenger boarding and disembarking.

[0021] 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 doors 11 open, or a close command signal for moving a pair of doors 11 close. When the platform door control unit 30 opens the corresponding door 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 11 in response to the close command signal, it transmits a full close signal to the general control panel 50.

[0022] 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 doors 11 of all the platform door devices 100 and a close request signal to close the doors 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.

[0023] 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. As a result, the general control panel 50 detects that the vehicle 61 has stopped. The crew 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 11. In response to receiving an open position signal (described below) from the open position sensor 42 (see FIG. 4), the platform door control unit 30 transmits a full-open signal to the general control panel 50. Upon receiving full-open signals from all platform door control units 30, the general control panel 50 transmits a full-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.

[0024] When passengers have boarded and disembarked and the vehicle 61 is about to depart from the platform 3, the crew of the vehicle 61 transmits a close request signal to the general control panel 50 via the ground coil 62 and the 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 its corresponding door 11. In response to receiving a closed position signal (described below) from a 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 the vehicle 61 via the vehicle information transmission device 63 and the ground coil 62. Upon receiving this fully closed confirmation signal, the crew of the vehicle 61 closes the vehicle door. Note that a station attendant may transmit a close request signal or an open request signal to the general control panel 50 using a station attendant operation panel 66 installed on the platform.

[0025] FIG. 3 is a front view of the platform door device 100 when the doors 11 are fully closed. FIG. 4 is a front view of the platform door device 100 when the doors 11 are fully open. The platform door device 100 includes a pair of door pockets 10, a pair of doors 11a and 11b (sometimes collectively referred to as doors 11), a pair of drive mechanisms 13 that drive the pair of doors 11 to open and close, a platform door control unit 30, a pair of stoppers 20, and a pair of position detection units 40. The pair of drive mechanisms 13 are not shown in FIG. 4. As will be described later, the stoppers 20 may deteriorate due to wear and tear. The platform door device 100 shown in FIGS. 3 and 4 is in a normal state, with no deterioration of the stoppers 20.

[0026] 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 doors 11. As shown in Figure 3, the platform door device 100 closes the boarding / alighting entrance E by moving the door edges of the doors 11 in a direction away from the door pockets 10 and bringing the door edges of the pair of doors 11 close to or into contact with each other. As shown in Figure 4, the platform door device 100 opens the boarding / alighting entrance E by moving the door edges of the doors 11 in a direction approaching the door pockets 10.

[0027] The door pockets 10 house the doors 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, a stopper 20, and a position detection unit 40. In addition, at least one of the pair of door pockets 10 is provided with a platform door control unit 30.

[0028] The drive mechanism 13 is provided on each of the pair of doors 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. 5).

[0029] The pair of pulleys 13p are connected to a motor 13m on both sides in the opening / closing direction Dx and are driven to rotate by the motor 13m. A drive belt 13t is looped around the pair of pulleys 13p. The connecting portion 13c transmits the movement of the drive belt 13t to the door 11, thereby transmitting the driving force of the motor 13m to the door 11. The connecting portion 13c is provided, for example, on the trailing edge side of the door 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.

[0030] The motor 13m is an example of a drive unit that drives the door 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 11 via the connecting unit 13c.

[0031] The stopper 20 determines whether the door 11 is in a fully open state or a fully closed state. Specifically, the stopper 20 includes a first stopper 22 and a second stopper 24. As shown in FIG. 4, the first stopper 22 comes into contact with a first location 15 of the door 11 when the door 11 is in a fully open state. This determines the fully open state of the door 11. The first stopper 22 comes into contact with the first location 15 of the door 11 during the opening operation to stop the opening operation of the door 11, and the state in which the first stopper 22 and the first location 15 come into contact is referred to as the fully open state. As shown in FIG. 3, the second stopper 24 comes into contact with a second location 17 of the door 11 when the door 11 is in a fully closed state. This determines the fully closed state of the door 11. The second stopper 24 comes into contact with the second point 17 of the door 11 as it closes to stop the closing operation of the door 11, and the state in which the second stopper 24 and the second point 17 come into contact is referred to as the fully closed state.

[0032] In the example shown in Figures 3 and 4, the door 11 extends in the opening / closing direction Dx below the floor surface 70 of the platform 3, and has a first location 15 located on the closing direction side (the right side in Figures 3 and 4 for the door 11a) and a second location 17 located on the opening direction side of the first location 15 (the left side in Figures 3 and 4 for the door 11a). The first location 15 and the second location 17 protrude in a direction intersecting the opening / closing direction Dx relative to other locations on the door 11. The first stopper 22 is located on the closing direction side of the second stopper 24 in the opening / closing direction Dx, and is located on the opening direction side of the opening / closing direction Dx relative to the first location 15. The second stopper 24 is located on the closing direction side of the opening / closing direction Dx relative to the second location 17.

[0033] When the second stopper 24 comes into contact with the second location 17 and the doors 11 are closed, the edges of the doors 11 may come into contact with each other, or a gap 23 may be formed as shown in Fig. 3. By forming a gap 23 between the edges of the doors 11, it is possible to prevent the doors 11 from colliding with each other. The first stopper 22 and the second stopper 24 are configured to include a cushioning material that may become worn with repeated use.

[0034] The position detection unit 40 detects that a predetermined portion of the door 11 is in a predetermined position. Specifically, the position detection unit 40 includes an open position sensor 42 and a closed position sensor 44. The open position sensor 42 detects that the first portion 15 of the door 11 is in a predetermined detection position during the opening operation. In the example shown in FIG. 4 , the open position sensor 42 starts detection just before the first portion 15 of the door 11 contacts the first stopper 22 during the opening operation, and continues detection until the first portion 15 contacts the first stopper 22, indicating that the door 11 is in the fully open state. While detecting the first portion 15, the open position sensor 42 transmits an open position signal indicating that the door 11 is in the open position. The closed position sensor 44 detects that the second portion 17 of the door 11 is in a predetermined detection position during the closing operation. 3, closed position sensor 44 starts detection immediately before second point 17 of door 11 comes into contact with second stopper 24 during the closing operation, and continues detection in the fully closed state where second point 17 comes into contact with second stopper 24. While detecting second point 17, closed position sensor 44 transmits a closed position signal indicating that door 11 is in the closed position. For example, magnetic detection type proximity sensors or photoelectric sensors are used as open position sensor 42 and closed position sensor 44.

[0035] Thus, when the platform door device 100 is in a normal state, the range of positions over which the open position sensor 42 detects the first point 15 of the door 11 includes the fully open position in which the first point 15 is in contact with the first stopper 22. Therefore, the open position sensor 42 can transmit an open position signal when the door 11 is in a fully open state. Similarly, when the platform door device 100 is in a normal state, the range of positions over which the closed position sensor 44 detects the second point 17 of the door 11 includes the fully closed position in which the second point 17 is in contact with the second stopper 24. Therefore, the closed position sensor 44 can transmit a closed position signal when the door 11 is in a fully closed state. However, if the stopper 20 deteriorates due to wear or the like, there may be cases where the open position sensor 42 does not transmit an open position signal even when the door 11 is in a fully open state, or where the closed position sensor 44 does not transmit a closed position signal even when the door 11 is in a fully closed state. Furthermore, when the open position sensor 42 transmits an open position signal, the platform door may not be in a fully open state, and when the closed position sensor 44 transmits a closed position signal, the platform door may not be in a fully closed state. Therefore, the platform door device 100 of this embodiment is capable of detecting an abnormality in the platform door device 100 by determining deterioration of the stopper 20, as will be described later.

[0036] Figure 5 is a functional block diagram of the integrated control panel 50 and the platform door device 100. Each functional block shown in each figure, including Figure 4, can be realized in hardware terms using electronic elements such as a computer CPU, microcontrollers, and mechanical parts, 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.

[0037] The platform door device 100 comprises a position detection unit 40, a platform door control unit 30, and a drive mechanism 13.

[0038] 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).

[0039] The platform door control unit 30 of this embodiment includes a communication unit 31, a drive control unit 32, a movement amount acquisition unit 33, a difference calculation unit 34, a deterioration judgment unit 35, an alarm unit 36, a memory unit 37, a reference generation unit 38, and a timing determination unit 39.

[0040] The communication unit 31 acquires various signals supplied from the outside. For example, the communication unit 31 receives an open position signal or a closed position signal from the position detection unit 40 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.

[0041] The drive control unit 32 controls the motor 13m to drive the door 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 doors 11 in the opening / closing direction Dx. The drive control unit 32 of this embodiment controls the drive current flowing through the motor 13m to control the driving of the door 11 in the opening / closing direction Dx.

[0042] The movement amount acquiring unit 33 acquires the movement amount of the door 11. For example, the movement amount acquiring unit 33 calculates the movement amount of the door 11 based on a pulse signal from the encoder 13e acquired via the communication unit 31. When the door 11 performs an opening operation, the movement amount acquiring unit 33 acquires the movement amount of the door 11 until the open position sensor 42 enters a detection state (also referred to as a "first movement amount") and the movement amount of the door 11 until the door 11 enters a fully open state (also referred to as a "second movement amount"). When the door 11 performs a closing operation, the movement amount acquiring unit 33 acquires the movement amount of the door 11 until the close position sensor 44 enters a detection state (also referred to as a "third movement amount") and the movement amount of the door 11 until the door 11 enters a fully closed state (also referred to as a "fourth movement amount"). When the pulse signal from the encoder 13e is interrupted for a certain period of time during the opening operation of the door 11, the movement amount acquiring unit 33 may determine that the door 11 has reached a fully open state and acquire a second movement amount. Similarly, when the pulse signal from the encoder 13e is interrupted for a certain period of time during the closing operation of the door 11, the movement amount acquiring unit 33 may determine that the door 11 has reached a fully closed state and acquire a fourth movement amount.

[0043] The first to fourth movement amounts acquired by the movement amount acquisition unit 33 will be described with reference to FIG. 6. FIG. 6 is a graph showing an example of changes over time in the first to fourth movement amounts acquired by the movement amount acquisition unit 33. In FIG. 6, the horizontal axis represents time, and the vertical axis represents the movement amount of the door 11. The horizontal axis of FIG. 6 starts, for example, from the time when the platform door device 100 is inspected and adjusted to operate normally, and as it moves in the positive direction, it represents the passage of time, for example, in units of several years, as the opening and closing operation of the door 11 is repeatedly performed. The vertical axis of FIG. 6 represents the movement amount along the opening / closing direction Dx of the door 11, and as it moves in the positive direction, it represents movement toward the opening direction.

[0044] In the example shown in FIG. 6, the first movement amount 80, i.e., the movement amount of the door 11 until the open position sensor 42 is in a detection state when the door 11 is opening, remains substantially unchanged over time. On the other hand, the second movement amount 82, i.e., the movement amount of the door 11 until the door 11 is fully open, gradually transitions toward the opening direction from a certain point in time. This indicates that the first stopper 22 is worn due to the first point 15 of the door 11 repeatedly colliding with the first stopper 22. When the first stopper 22 wears, a portion of the first stopper 22 is missing on the closing direction side in the opening / closing direction Dx compared to the example shown in FIG. 4. Therefore, the door 11 that reaches the fully open state moves further toward the opening direction in the opening / closing direction Dx than the example shown in FIG. 4.

[0045] The third movement amount 84 and the fourth movement amount 86 have the same relationship as the first movement amount 80 and the second movement amount 82 described above. That is, in the example shown in FIG. 6, the third movement amount 84, i.e., the movement amount of the door 11 until the closed position sensor 44 enters a detection state when the door 11 is closing, does not change substantially over time. On the other hand, the fourth movement amount 86, i.e., the movement amount of the door 11 until the door 11 reaches a fully closed state, gradually transitions toward the closing direction from a certain point in time as time passes. This indicates that the second stopper 24 is worn due to repeated collisions between the second point 17 of the door 11 and the second stopper 24. When the second stopper 24 wears, a portion of the second stopper 24 is missing on the opening direction side in the opening / closing direction Dx compared to the example shown in FIG. 3. Therefore, the door 11 that reaches the fully closed state moves further toward the closing direction in the opening / closing direction Dx compared to the example shown in FIG. 3.

[0046] Returning to the explanation of Figure 5, the movement amount acquisition 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, instead of or in addition to the pulse signal of the encoder 13e. The movement amount acquisition unit 33 may then calculate the movement amount of the door 11 based on the acquired values. Furthermore, the platform door device 100 may be equipped with, for example, a dedicated sensor for acquiring the position and movement amount of the door 11. In this case, the movement amount acquisition unit 33 calculates the movement amount of the door 11 based on the signal from the dedicated sensor.

[0047] The difference calculation unit 34 calculates a difference value between the first movement amount and the second movement amount, and a difference value between the third movement amount and the fourth movement amount, both of which are acquired by the movement amount acquisition unit 33. In Fig. 6, the difference value between the first movement amount 80 and the second movement amount 82 is shown as a first difference value 88, and the difference value between the third movement amount 84 and the fourth movement amount 86 is shown as a second difference value 90. The difference calculation unit 34 calculates the first difference value 88 and the second difference value 90 at predetermined times.

[0048] The deterioration determination unit 35 determines deterioration of the stopper 20 based on the movement amount of the door 11 acquired by the movement amount acquisition unit 33 and the detection information of the position detection unit 40. Specifically, the deterioration determination unit 35 determines that the first stopper 22 has deteriorated when the difference value between the first movement amount 80 and the second movement amount 82 calculated by the difference calculation unit 34, i.e., the first difference value 88, is equal to or greater than a threshold value. Furthermore, the deterioration determination unit 35 determines that the second stopper 24 has deteriorated when the difference value between the third movement amount 84 and the fourth movement amount 86 calculated by the difference calculation unit 34, i.e., the second difference value 90, is equal to or greater than a threshold value. If the memory unit 37 described below stores the first movement amount 80 to the fourth movement amount 86, the deterioration determination unit 35 may read the first movement amount 80 to the fourth movement amount 86 from the memory unit 37 and perform the above-mentioned determination process.

[0049] Here, the details of the threshold value used by the deterioration determination unit 35 will be explained. As described above, when the platform door apparatus 100 is in a normal state, the open position sensor 42 transmits an open position signal when the door 11 is fully open, and the closed position sensor 44 transmits a closed position signal when the door 11 is fully closed. However, as the first differential value 88 increases, the difference between the timing at which the open position sensor 42 transmits the open position signal and the timing at which the door 11 is fully open increases. Similarly, as the second differential value 90 increases, the difference between the timing at which the closed position sensor 44 transmits the closed position signal and the timing at which the door 11 is fully closed increases. This makes it difficult to accurately determine the open / closed state of the door 11 of the platform door apparatus 100, making control difficult. Furthermore, even when the platform door apparatus 100 is configured to form a gap 23 between the door edges of each door 11 in the fully closed state as shown in FIG. 3, wear, particularly of the second stopper 24, can cause the door edges of the doors 11 to collide with each other. Therefore, the platform door apparatus 100 of this embodiment can prevent such malfunctions by setting the threshold value to an appropriate value.

[0050] The threshold value used by the deterioration determination unit 35 may be determined so that the gap 23 between the door edges of each door 11 is a dimension, such as 5 mm, that allows detection of inter-door entrapment. The deterioration determination unit 35 may perform the determination process on the first difference value 88 obtained with one opening operation of the door 11 or the second difference value 90 obtained with one closing operation of the door 11, or may perform the determination process on the average or median of the first difference value 88 or the second difference value 90 accumulated over a certain period of time, such as several months or several years. The deterioration determination unit 35 may perform a multi-stage determination on at least one of the first difference value 88 and the second difference value 90. For example, the deterioration judgment unit 35 may use first to third thresholds to judge that the first stopper 22 requires attention if the first difference value 88 is greater than or equal to the first threshold and less than the second threshold, to judge that replacement of the first stopper 22 is recommended if the first difference value 88 is greater than or equal to the second threshold and less than the third threshold, and to judge that the first stopper 22 is abnormal if the first difference value 88 is greater than or equal to the third threshold.

[0051] The notification unit 36 ​​issues a notification when the deterioration determination unit 35 determines that the stopper 20 has deteriorated. The form of the notification unit 36 ​​is not particularly limited, and may be, for example, a speaker, a patrol lamp, etc. installed in the platform door device 100, or a speaker, a patrol lamp, etc. 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 stopper 20.

[0052] 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 35, and information on a predetermined period used by the timing determination unit 39 (described later). The storage unit 37 includes, for example, a non-volatile memory.

[0053] The memory unit 37 stores the difference values ​​calculated by the memory unit 37 over time. In this embodiment, an example is shown in which the memory unit 37 is provided in the platform door control unit 30, but the memory unit 37 may also be provided in the general control panel 50, and the contents stored in the memory unit 37 may also be transmitted to the platform door control unit 30 via the communication unit 31.

[0054] The reference generation unit 38 generates a threshold value used by the deterioration determination unit 35 in the determination process. The reference generation unit 38 generates an individual threshold value for each door 11 or each platform door device 100 according to the operating conditions of each door 11, for example, after several opening and closing operations or several months of operation. The reference generation unit 38 may also adjust the threshold value as needed depending on the installation status and usage status of the platform door device 100. The reference generation unit 38 may also adjust the threshold value as needed depending on external environmental information such as the season, temperature, humidity, and amount of ultraviolet light. To further reduce the effects of expansion and contraction of the door 11, the reference generation unit 38 may lower the threshold value, for example, in winter when temperatures tend to drop, because the stopper 20 becomes harder and less likely to deform. Alternatively, the reference generation unit 38 may raise the threshold value, for example, in summer when temperatures tend to rise, because the stopper 20 becomes softer and more likely to deform.

[0055] The timing determination unit 39 determines the timing for the deterioration determination unit 35 to execute the determination process. The timing determination unit 39 determines the timing for the deterioration determination unit 35 to execute the determination process after a predetermined period of time has elapsed since the deterioration determination unit 35 last executed the determination process. For example, the timing determination unit 39 may determine the timing for the deterioration determination unit 35 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 35 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 39 may determine the timing for the deterioration determination unit 35 to execute the determination process based on elapsed time, or may determine the timing for the deterioration determination unit 35 to execute the determination process each time the drive control unit 32 controls the opening and closing drive of the door 11 a predetermined number of times. In this way, by having the deterioration determination unit 35 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.

[0056] Similarly to the above, the timing determination unit 39 may determine the timing at which the difference calculation unit 34 calculates the difference value. This allows the difference calculation unit 34 to calculate the difference value at time intervals, thereby saving more power than when the calculation is performed more frequently.

[0057] The timing determination unit 39 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 the timing determined by the timing determination unit 39, in addition to the 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 the inspection operation, the calculation of the difference value by the difference calculation unit 34 and the determination process by the deterioration determination unit 35 may be performed 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 39 may be, for example, at night or early in the morning when trains are not running.

[0058] Fig. 7 is a graph showing another example of the time changes of the first to fourth movement amounts acquired by the movement amount acquisition unit 33. In Fig. 7, the horizontal axis indicates time, and the vertical axis indicates the movement amount of the door 11. The information indicated by the horizontal and vertical axes in Fig. 7 is the same as that in Fig. 6. Furthermore, matters in Fig. 7 other than those described later are the same as those described above with reference to Fig. 6.

[0059] In the example shown in FIG. 7 , the first movement amount 80, i.e., the movement amount of the door 11 until the open position sensor 42 enters a detection state when the door 11 opens, gradually transitions toward the opening direction from a certain point in time. This indicates that the door 11 is expanding in the opening / closing direction Dx due to the influence of heat or the like. When the door 11 expands in the opening / closing direction Dx, the position of the first point 15 moves away from the open position sensor 42 toward the closing direction in the opening / closing direction Dx, so the movement amount of the door 11 until the first point 15 is detected by the open position sensor 42, i.e., the first movement amount 80, increases. In this case, the movement amount of the door 11 until the first point 15 contacts the first stopper 22, i.e., the second movement amount 82, also increases as the door 11 expands in the opening / closing direction Dx. Therefore, the difference calculation unit 34 calculates a first difference value 88 between the first movement amount 80 and the second movement amount 82, and the deterioration determination unit 35 executes a determination process based on the first difference value 88, thereby reducing the influence of the expansion of the door 11. The matters described above regarding the first difference value 88 also apply to the second difference value 90. The same also applies to the case where the door 11 contracts due to cooling or the like.

[0060] Note that the degree to which the motor 13m provided in the drive mechanism 13 expands or contracts is sufficiently small compared to the degree to which the door 11 expands or contracts. Therefore, when the movement amount acquisition unit 33 calculates the movement amount of the door 11 based on the pulse signal from the encoder 13e, it can be assumed that the reference for the movement amount does not change. Furthermore, when the movement amount acquisition unit 33 calculates the movement amount of the door 11 based on a signal from a dedicated sensor, the dedicated sensor may be installed, for example, on the platform 3 outside the platform door device 100 in order to reduce the influence of the expansion or contraction of the door 11.

[0061] Figure 8 is a flowchart showing an example of the operation of the platform door control unit 30. If the door 11 is in the opening operation (Y at S10), the platform door control unit 30 proceeds to step S12, and if the door 11 is not in the opening operation (N at S10), it terminates the processing. The platform door control unit 30 may execute the processing of this flowchart on the condition that the door 11 is in the opening operation. In that case, it is not necessary to execute the processing of step S10. Furthermore, the platform door control unit 30 does not necessarily execute the processing of this flowchart every time the door 11 is in the opening operation.

[0062] The process waits until the open position sensor 42 enters a detection state (N in S12), and when the open position sensor 42 enters a detection state (Y in S12), the movement amount acquisition unit 33 acquires the first movement amount 80 (S14). Thereafter, the process waits until the door 11 enters a fully open state (N in S16), and when the door 11 enters a fully open state (Y in S16), the movement amount acquisition unit 33 acquires the second movement amount 82 (S18).

[0063] Thereafter, the difference calculation unit 34 calculates a first difference value 88 between the first movement amount 80 and the second movement amount 82, stores it in the storage unit 37 (S20), and ends the process.

[0064] In this way, each time the platform door control unit 30 executes the processing of this flowchart, it accumulates and stores the first difference value 88 in the memory unit 37. In Figure 8, the processing when the door 11 is in the opening operation has been described, but the same applies when the door 11 is in the closing operation, and the platform door control unit 30 accumulates and stores the second difference value 90 in the memory unit 37.

[0065] Figure 9 is a flowchart showing another example of the operation of the platform door control unit 30. The processing of this flowchart is processing for determining deterioration of the stopper 20 using the first difference value 88 and the second difference value 90 stored in the memory unit 37 by the processing of the flowchart shown in Figure 8.

[0066] If it is time for the deterioration determination unit 35 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 35 to execute the determination process (N in S30), the processing ends. The execution timing of the determination process by the deterioration determination unit 35 may be the timing determined by the timing determination unit 39, for example.

[0067] The deterioration determination unit 35 acquires at least one of the first difference value 88 and the second difference value 90 from the storage unit 37 (S32). The deterioration determination unit 35 determines whether at least one of the acquired first difference value 88 and the second difference value 90 is equal to or greater than a threshold value (S34). If it is equal to or greater than the threshold value (Y in S34), it determines that the stopper 20 has deteriorated (S36). On the other hand, if it is not equal to or greater than the threshold value (N in S34), it determines that the stopper 20 has not deteriorated, and ends the process.

[0068] After step S36, the notification unit 36 ​​issues a notification (S38), and the process ends.

[0069] As described above, the platform door device 100 of this embodiment includes a drive unit that drives the door 11 to open and close, a stopper 20 that determines whether the door 11 is in a fully open or fully closed position, a position detection unit 40 that detects whether the door 11 is in a predetermined position, a movement amount acquisition unit 33 that acquires the amount of movement of the door 11, and a deterioration determination unit 35 that determines deterioration of the stopper 20 based on the amount of movement of the door 11 acquired by the movement amount acquisition unit 33 and the detection information of the position detection unit 40. This allows the platform door device 100 to determine deterioration of the stopper 20, making it easier to ensure normal operation of the platform door device. Furthermore, because the platform door device 100 determines deterioration of the stopper 20 based on the amount of movement of the door 11 and the detection information of the position detection unit 40, the determination result makes it easier to reduce the effects of expansion and contraction of the door 11.

[0070] Furthermore, in the platform door device 100 of this embodiment, the position detection unit 40 detects that a predetermined portion of the door 11 that is in contact with the stopper 20 during an opening or closing operation is in a predetermined position. As a result, the portion of the door 11 that is in contact with the stopper 20 and the portion of the door 11 detected by the position detection unit 40 are the same portion, so even if the door 11 expands or contracts, the impact on the determination result can be further reduced.

[0071] Furthermore, in the platform door device 100 of this embodiment, the position detection unit 40 detects when a predetermined portion of the door 11 during an opening operation reaches a predetermined position, the movement amount acquisition unit 33 acquires a first movement amount 80 of the door 11 until the position detection unit 40 enters a detection state and a second movement amount 82 of the door 11 until the door 11 is in a fully open state, and the deterioration determination unit 35 determines that the first stopper 22 has deteriorated if the difference between the first movement amount 80 and the second movement amount 82 is equal to or greater than a threshold value. This makes it possible for the platform door device 100 to determine deterioration of the first stopper 22, which comes into contact with the door 11 in a fully open state.

[0072] Furthermore, in the platform door device 100 of this embodiment, the position detection unit 40 detects when a predetermined portion of the door 11 during a closing operation reaches a predetermined position, the movement amount acquisition unit 33 acquires a third movement amount 84 of the door 11 until the position detection unit 40 enters a detection state, and a fourth movement amount 86 of the door until the door 11 enters a fully closed state, and the deterioration determination unit 35 determines that the second stopper 24 has deteriorated if the difference between the third movement amount 84 and the fourth movement amount 86 is equal to or greater than a threshold value. This makes it possible for the platform door device 100 to determine deterioration of the second stopper 24, which comes into contact with the door 11 in a fully closed state.

[0073] The platform door device 100 of this embodiment further includes a storage unit 37 that stores the difference value over time. This allows the platform door device 100 to store data that allows for analysis of changes in the difference value over time.

[0074] The platform door device 100 of this embodiment further includes a standard generation unit 38 that generates a threshold value according to at least one of the operation status, installation status, and usage status of at least one of the doors 11 and the platform door device 100, and external environment information. This allows the platform door device 100 to set an appropriate threshold value according to the installation environment of the platform door device 100, etc.

[0075] The platform door device 100 of this embodiment further includes a notification unit 36 ​​that issues a notification when the deterioration determination unit 35 determines that the stopper 20 has deteriorated. This allows the platform door device 100 to notify those around it of deterioration of the stopper 20 at an early stage.

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

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

[0080] In addition, in Figures 3 and 4 of this embodiment, an example is shown in which the first location 15, the second location 17, the stopper 20, and the position detection unit 40 are located below the floor surface 70 of the platform 3, but the locations at which these components are installed are not particularly limited.

[0081] Furthermore, in this embodiment, the stopper 20 is described as being provided in the door pocket 10, but the stopper 20 may also be provided in the door 11. In this case, the first stopper 22 may be provided integrally with the first location 15, and the second stopper 24 may be provided integrally with the second location 17. Then, at the positions shown as the first stopper 22 and the second stopper 24 in Figures 3 and 4, members that come into contact with the first stopper 22 and the second stopper 24, respectively, when the door 11 is in the fully open or fully closed state may be provided.

[0082] The communication unit 31 may transmit information stored in the memory unit 37, information related to the determination by the deterioration determination unit 35, 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, etc. The communication unit 31 may also communicate with the external terminal, etc. via a wired or wireless connection, and may transmit this information directly to the external terminal, etc.

[0083] At least one of the deterioration determination unit 35 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 35 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.

[0084] 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]

[0085] 10...door pocket, 11, 20...stopper, 30...platform door control unit, 33...movement amount acquisition unit, 34...difference calculation unit, 35...deterioration judgment unit, 36...alarm unit, 37...memory unit, 38...reference generation unit, 40...position detection unit, 80...first movement amount, 82...second movement amount, 84...third movement amount, 86...fourth movement amount, 100...platform door device.

Claims

1. a drive unit that drives the door to open and close; a stopper that defines a fully open position or a fully closed position of the door; a position detection unit that detects that the door is in a predetermined position; a movement amount acquisition unit that acquires the movement amount of the door; a deterioration determination unit that determines deterioration of the stopper based on the movement amount of the door acquired by the movement amount acquisition unit and detection information of the position detection unit; A platform door device equipped with:

2. the position detection unit detects that a predetermined portion of the door that contacts the stopper during an opening operation or a closing operation is at the predetermined position; The platform door device according to claim 1.

3. The position detection unit detects when a predetermined portion of the door during an opening operation reaches the predetermined position, the movement amount acquisition unit acquires a first movement amount of the door until the position detection unit enters a detection state and a second movement amount of the door until the door enters a fully open state; the deterioration determination unit determines that the stopper has deteriorated when a difference between the first movement amount and the second movement amount is equal to or greater than a threshold value. The platform door device according to claim 1.

4. the position detection unit detects when a predetermined portion of the door during a closing operation reaches the predetermined position, the movement amount acquisition unit acquires a third movement amount of the door until the position detection unit enters a detection state and a fourth movement amount of the door until the door enters a fully closed state; the deterioration determination unit determines that the stopper has deteriorated when a difference between the third movement amount and the fourth movement amount is equal to or greater than a threshold value. The platform door device according to claim 1.

5. The platform door device according to claim 3 or 4, further comprising a memory unit that stores the difference value over time.

6. The platform door device according to claim 3 or 4, further comprising a reference generation unit that generates the threshold value according to at least one of the operation status, installation status, and usage status of at least one of the door and the platform door device, and external environment information.

7. The platform door device according to claim 1, further comprising an alarm unit that issues an alarm when the deterioration determination unit determines that the stopper has deteriorated.

8. A method for controlling a platform door device comprising: a drive unit that drives the door to open and close; and a stopper that determines the fully open position or the fully closed position of the door; detecting that the door is in position; acquiring the amount of movement of the door; determining whether the stopper has deteriorated based on the acquired movement amount of the door and the detected information; A platform door control method including:

9. A platform door control program for controlling a platform door device including a drive unit that drives the door to open and close, and a stopper that determines the position of the door in a fully open state or a fully closed state, the program including: detecting that the door is in position; acquiring the amount of movement of the door; determining whether the stopper has deteriorated based on the acquired movement amount of the door and the detected information; A platform door control program for executing the above.

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