JP7493410B2 - Sliding door device and acquisition device - Google Patents

Description

The present invention relates to a sliding door device and an acquisition device.

Patent Document 1 describes a movable platform gate (sliding door device) that is installed on a platform at a train station and opens and closes the boarding and alighting passageway through which passengers board and alight from trains. The sliding door device in Patent Document 1 includes a rail that extends in the opening and closing direction and a linear guide bearing (guide block) that is slidably engaged with the rail. The guide block contains multiple rolling elements that are configured to roll in contact with the rail.

JP 2019-98847 A

In sliding door devices that use rails and guide blocks, it is necessary to maintain good lubrication between the rolling surfaces of the rails and guide blocks and the rolling elements. This is to reduce wear on the rails and guide blocks and to extend their lifespan. Generally, in sliding door devices, a lubricant is used to maintain lubrication between the rolling surfaces of the rails and guide blocks and the rolling elements. This lubricant is replenished or replaced as necessary.

However, as the rolling elements repeatedly move on the rails when the sliding door is opened and closed, the amount of lubricant decreases or deteriorates. This decrease or deterioration of the lubricant increases the sliding resistance between the rolling elements and the rolling surfaces of the rail and guide block. As a result, the rail and guide block may wear out and their surfaces may peel off before the lubricant can be replenished or replaced.

On the other hand, if the interval between lubricant replenishment or replacement is set too short, the number of replenishment or replacement will increase. As a result, the burden on the replenishment or replacement worker will increase.

In view of the above problems, the object of the present invention is to provide a sliding door device that makes it possible to properly determine the condition of the lubricant.

To solve the above problems, the sliding door device of the present invention comprises a sliding door that can move in the opening and closing direction relative to a door pocket, a rail that is fixed to the door pocket or the sliding door and extends in the opening and closing direction, a guide block that holds a rolling element that contacts the rail, and an acquisition unit that acquires status information regarding the status of a lubricant that exists between the rail and the rolling element.

In addition, 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.

The present invention provides a sliding door device that allows the state of the lubricant to be properly determined.

1 is a block diagram illustrating a platform screen door system equipped with a platform door device of a first embodiment. FIG. Figure 2(a) is a front view of the platform door device when the sliding doors are in the fully closed position, and Figure 2(b) is a front view of the platform door device when the sliding doors are in the fully open position. FIG. This is a cross-sectional view taken along line AA in FIG. FIG. 2 is a perspective view of the linear guide according to the first embodiment. A block diagram showing the platform door control unit and general control panel of the platform door device of the first embodiment. 4 is a flowchart showing the operation of the platform door control unit of the first embodiment. 13A and 13B are diagrams for explaining a manner in which the state of a lubricant is detected in the third embodiment. 13A and 13B are diagrams showing the arrangement of receiving portions in a third embodiment. Figure 10(a) is a diagram showing the arrangement of the receiving portion in a modified example of the third embodiment when the sliding door is in a fully closed position, and Figure 10(b) is a diagram showing the arrangement of the receiving portion in a modified example of the third embodiment when the sliding door is in a fully open position. FIG. 13 is a diagram showing the arrangement of image sensors in a modified example of the third embodiment. Figure 12(a) is a diagram showing the arrangement of the image sensor in a modified example of the third embodiment when the sliding door is in a fully closed position, and Figure 12(b) is a diagram showing the arrangement of the image sensor in a modified example of the third embodiment when the sliding door is in a fully open position. A block diagram showing the platform door control unit and general control panel of the platform door device of the fifth embodiment. 13 is a flowchart showing the operation of the platform door control unit of the fifth embodiment. A block diagram showing the platform door control unit and general control panel of the platform door device of the sixth embodiment. 13 is a flowchart showing the operation of the platform door control unit of the sixth embodiment. FIG. 23 is a block diagram showing an acquisition device according to a seventh embodiment. 23 is a flowchart showing the operation of the acquisition device of the seventh embodiment. FIG. 23 is a block diagram showing an acquisition device according to an eighth embodiment. 13 is a flowchart showing the operation of an acquisition device according to an eighth embodiment.

In the following embodiments and variations, identical or equivalent components and parts are given the same reference numerals, and duplicate explanations are omitted where appropriate. The dimensions of the parts in each drawing are enlarged or reduced as appropriate to facilitate understanding. Some parts that are not important for explaining the embodiments are omitted in each drawing.

[First embodiment]
A platform screen door system 1 will be described with reference to Fig. 1. The platform screen door system 1 includes a general control panel 50 and a plurality of platform door devices 100. The platform door device 100 is an example of a sliding door device. The platform door device 100 includes a platform door control unit 30.

The multiple platform door devices 100 are provided on the up and down tracks of the station platform. When the vehicle 61 stops at a predetermined position on the platform, the multiple platform door devices 100 are each positioned at the boarding and alighting entrances provided at positions corresponding to each vehicle door of the vehicle 61.

One general control panel 50 is provided on each platform and is connected to each platform door control unit 30 of the multiple platform door devices 100. The sliding doors 11 (see FIG. 2) of the platform door devices 100 are controlled to open and close by the general control panel 50 via the platform door control unit 30. Passengers can board and disembark from the vehicle 61 by opening the vehicle doors and the sliding doors 11. Passengers can only board and disembark by closing either the vehicle doors or the sliding doors 11.

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 an open command signal and a close command signal for the sliding door 11 to each platform door control unit 30. When the platform door control unit 30 opens the corresponding sliding door 11 in response to an 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 sliding door 11 in response to a close command signal, it transmits a full close signal to the general control panel 50. Each platform door control unit 30 can transmit status information, etc., described below, to the general control panel 50.

The general control panel 50 and the vehicle 61 can communicate with each other via the vehicle information transmission device 63 and the ground coil 62. The vehicle 61 can transmit to the general control panel 50 an open request signal to open the sliding doors 11 of all the platform door devices 100 and a close request signal to close the sliding doors 11 of all the platform door devices 100. When the general control panel 50 receives a full open signal or a full closed signal from all the platform door control units 30, it can transmit a full open confirmation signal or a full closed 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.

The operation of the platform screen door system 1 will be described. When the vehicle 61 reaches a predetermined position on the platform 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 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 sliding door 11. In response to receiving a fully open position signal from the fully open position sensor 41a described below, the platform door control unit 30 transmits a fully open signal to the general control panel 50. When the general control panel 50 receives a fully open signal from all platform door control units 30, it transmits a fully open confirmation signal to the vehicle 61 via the vehicle information transmission device 63 and the ground coil 62. When the driver of vehicle 61 receives this full-open confirmation signal, he or she opens the vehicle door.

When passengers have boarded and disembarked and the vehicle 61 departs from the platform, 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 the corresponding sliding door 11. In response to receiving a fully closed position signal from a fully closed position sensor 41b described below, each platform door control unit 30 transmits a fully closed signal to the general control panel 50. When the general control panel 50 receives fully closed signals from all platform door control units 30, it transmits a fully closed confirmation signal to the vehicle 61 via the vehicle information transmission device 63 and the ground coil 62. When the crew of the vehicle 61 receives this fully closed confirmation signal, they close 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.

The platform door device 100 will be described with reference to Figures 2 to 4. The platform door device 100 has a door pocket 10, a sliding door 11 that can move from the door pocket 10 in the opening and closing direction Dx, a door end side support part 12 into which the door end of the sliding door 11 can be inserted and which supports the sliding door 11 via the inserted door end, linear guides 20U and 20L that guide the sliding door 11 in the opening and closing direction Dx, and a platform door control part 30.

The platform door device 100 opens and closes the boarding/alighting entrance E, which is the space between the door pocket 10 and the door-end support portion 12, by moving the sliding door 11. The platform door device 100 closes the boarding/alighting entrance E by moving the door end of the sliding door 11 in a direction away from the door pocket 10 and inserting the door end of the sliding door 11 into the door-end support portion 12 (see FIG. 2(a)). The platform door device 100 opens the boarding/alighting entrance E by moving the door end of the sliding door 11 in a direction approaching the door pocket 10 (see FIG. 2(b)).

The door pocket 10 is configured with the opening and closing direction Dx as the longitudinal direction when viewed from the front. The door pocket 10 houses the panel-shaped sliding door 11 so that it can move forward and backward. The door pocket 10 is placed on the platform. The door pocket 10 is provided with a drive unit 13 that drives the sliding door 11 to open and close, a platform door control unit 30, and various sensors. The drive unit 13 includes a motor 13m that opens and closes the sliding door 11 according to the control of the platform door control unit 30, a pair of rotating bodies 13p connected to the motor 13m on both sides of the opening and closing direction Dx, a connecting unit 13c that transmits the driving force of the motor 13m to the sliding door 11, and a transmission member 13t that is wrapped around the pair of rotating bodies 13p. The connecting unit 13c is provided on the door end side of the sliding door 11.

Refer to Figure 3. The door pocket 10 includes a pair of support posts 17 spaced apart in the opening/closing direction Dx, and a connecting post 18 that connects the pair of support posts 17 in the opening/closing direction Dx. The drive unit 13 and the platform door control unit 30 are attached to the connecting post 18.

The sliding door 11 is configured with the opening/closing direction Dx as the longitudinal direction when viewed from the front. The sliding door 11 includes a transparent panel portion 14 that constitutes a part of the surface of the sliding door 11, a pair of upper and lower frames 15U and 15L that extend in the opening/closing direction Dx and support both ends of the transparent panel portion 14 in the up-down direction Dy, and a vertical frame 16 that holds both ends of the transparent panel portion 14 in the opening/closing direction Dx. The transparent panel portion 14 is configured, for example, as a glass plate, a translucent resin plate, or a glass plate sandwiched between translucent resin plates. The transparent panel portion 14 is disposed closer to the platform side in the thickness direction of the upper frame 15U and the lower frame 15L. The platform side front surface of the transparent panel portion 14 is configured to be approximately flush with the platform side front surfaces of the upper frame 15U and the lower frame 15L.

The linear guides 20U and 20L support and guide the pair of upper and lower frames 15U and 15L, respectively, in the opening/closing direction Dx when the sliding door 11 moves in the opening/closing direction Dx. The linear guides 20U and 20L are attached to the pair of upper and lower frames 15U and 15L, respectively. The linear guides 20U and 20L are disposed on the rear side of the transparent panel portion 14.

The linear guides 20U and 20L each include a rail 21U or 21L extending in the opening/closing direction Dx, and a guide block 22U or 22L that holds a rolling element 22a that contacts the rail 21U or 21L. The rolling element 22a is movable relative to the rail 21U or 21L in the opening/closing direction Dx. The rails 21U or 21L are fixed downward to the upper frame 15U or lower frame 15L of the sliding door 11, respectively, and extend parallel to the upper frame 15U or lower frame 15L. The rails 21U or 21L have a length that covers almost the entire sliding door 11 in the opening/closing direction Dx.

Guide blocks 22U and 22L are attached to rails 21U and 21L, respectively. Guide blocks 22U and 22L include leading-side guide blocks 22Ua and 22La provided on the leading side of sliding door 11, and trailing-side guide blocks 22Ub and 22Lb provided on the trailing side of sliding door 11, spaced apart from leading-side guide blocks 22Ua and 22La in the opening/closing direction Dx. Guide blocks 22U and 22L are supported by rails 21U and 21L in two directions perpendicular to opening/closing direction Dx. Therefore, the relative movement of guide blocks 22U and 22L with respect to rails 21U and 21L is restricted in two directions perpendicular to opening/closing direction Dx. In this embodiment, guide blocks 22U and 22L are provided in door pocket 10.

The number of guide blocks 22U and 22L in each of the linear guides 20U and 20L can be set arbitrarily. For example, the number of guide blocks 22U and 22L in the linear guides 20U and 20L may be different from each other. Also, one of the linear guides 20U and 20L may be omitted.

The guide blocks 22U and 22L will be described in detail with reference to FIG. 5. Hereinafter, the rails 21U and 21L may be referred to as rails 21. Also, the guide blocks 22U and 22L may be referred to as guide blocks 22.

Inside the guide block 22, a rolling element circulation path 22b is formed in which a number of rolling elements 22a are loaded so as to be able to roll freely. The rolling element circulation path 22b includes a rolling element rolling path 22c, a rolling element return path 22d, and a pair of U-shaped direction change paths 22e. The pair of direction change paths 22e connect both ends of the rolling element rolling path 22c and the rolling element return path 22d, allowing the rolling elements 22a to circulate endlessly through the rolling element circulation path 22b. The rolling elements 22a are configured to roll in contact with the rolling element rolling surface 21a of the rail 21 while circulating through the rolling element circulation path 22b. This allows the guide block 22 to move back and forth relative to the rail 21.

Although not all are shown, the guide block 22 of this embodiment has four rolling element circulating paths 22b formed to correspond to the four rolling element rolling surfaces 21a of the rail 21. This is not limiting, and the number of rolling element rolling surfaces 21a and rolling element circulating paths 22b can be changed depending on the application of the linear guide 20. Furthermore, the rolling elements 22a of this embodiment are balls, but may also be rollers or rollers.

A pair of cover members 23 are installed on both ends of the guide block 22 in the opening/closing direction Dx. A pair of oil seals 24 that seal the gap between the rail 21 and the guide block 22 are installed on each of the pair of cover members 23. The oil seal 24 has a lip portion 25 that is in contact with the rail 21 and can slide relative to the rail 21 at the contact portion with the rail 21. The lip portion 25 of the oil seal 24 contacts the rail 21 without any gaps, thereby preventing foreign matter from entering the guide block 22 and preventing lubricant from leaking out of the guide block 22. The oil seal 24 is made of rubber, synthetic resin, etc.

The guide block 22 includes a lubricant supply unit 26 for supplying lubricant between the rail 21 and the rolling element 22a. The lubricant supply unit 26 has a lubricant supply port 26a and a lubricant supply path 26b. The lubricant supply port 26a is connected to each rolling element circulation path 22b via the lubricant supply path 26b. By supplying lubricant through the lubricant supply port 26a, it is possible to supply the lubricant to the rolling element 22a of each rolling element circulation path 22b via the lubricant supply path 26b. The lubricant in this embodiment is semi-solid such as grease, but is not limited thereto, and may be liquid such as oil, solid such as wax, or powder such as carbon. In this embodiment, the lubricant supply unit 26 is provided in the guide block 22, but is not limited thereto, and the lubricant supply unit 26 may be provided outside the guide block 22. In this case, an oil seal 24 may be provided in the lubricant supply unit 26 outside the guide block 22.

In the linear guide 20 configured in this manner, when the rolling element 22a moves on the rail 21, the rolling element 22a repeatedly circulates within the rolling element circulation path 22b. This circulatory movement automatically supplies the lubricant accumulated in the lubricant supply path 26b between the rail 21 and the rolling element 22a. This allows the lubricant to spread between the rail 21 and the rolling element 22a, allowing the rolling element 22a to move smoothly on the rail 21.

The general control panel 50 will be described with reference to Figure 6. Each functional block shown in Figure 6 and other figures can be realized in hardware terms by electronic elements and mechanical parts such as a computer CPU, and in software terms by a computer program, 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.

The general control panel 50 includes a status acquisition unit 51, a command control unit 52, and a communication control unit 53. The status acquisition unit 51 acquires status information, a fully open signal, and a fully closed signal from the platform door control unit 30. When the command control unit 52 receives an open request signal or a close request signal from the vehicle 61 or the station staff operation panel 66, it transmits an open command signal or a close command signal to the door control unit 32 of the platform door control unit 30. The communication control unit 53 transmits a fully open confirmation signal or a fully closed confirmation signal to the vehicle information transmission device 54. The communication control unit 53 transmits an acquisition command, described below, to the acquisition unit 33 of the platform door control unit 30.

The communication control unit 53 also transmits predetermined information to the station office display device 64 and the display device provided on the station staff operation panel 66. As an example, these display devices display the presence or absence of abnormalities in the sliding doors 11 of the up and down lines based on this information. The communication control unit 53 also transmits predetermined information to the general command room display device 65 in the general command room provided in a location away from the station. As an example, the general command room display device 65 displays the presence or absence of abnormalities in the sliding doors 11 of all stations based on this information.

Refer to FIG. 6. The platform door device 100 includes an open/close detection unit 41 and a state detection unit 43. The open/close detection unit 41 includes a fully open position sensor 41a and a fully closed position sensor 41b. The fully open position sensor 41a is a sensor that detects whether the sliding door 11 is in the fully open position, and transmits a fully open position signal indicating that the sliding door 11 is in the fully open position. The fully closed position sensor 41b is a sensor that detects whether the sliding door 11 is in the fully closed position, and transmits a fully closed position signal indicating that the sliding door 11 is 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 41a and the fully closed position sensor 41b.

2 and 3. The state detection unit 43 of this embodiment includes a film thickness sensor 43a. The film thickness sensor 43a measures the film thickness of the lubricant adhering to the surface of the rail 21. The film thickness sensor 43a of this embodiment is an optical sensor, and detects the film thickness based on the path difference between the reflected light on the surface of the rail 21 and the reflected light on the surface of the lubricant film when light is irradiated onto the surface of the rail 21. The film thickness sensor 43a of this embodiment is provided in the door pocket 10. The film thickness sensor 43a of this embodiment is provided between the door leading guide block 22Ua (22La) and the door trailing guide block 22Ub (22Lb). The film thickness sensor 43a of this embodiment is provided below each of the rails 21U and 21L, but is not limited thereto, and may be provided at any position as long as the film thickness of the lubricant adhering to the surface of the rail 21 can be measured. The film thickness sensor 43a may also be provided on only one of the rails 21U and 21L.

The platform door control unit 30 of this embodiment will be described with reference to FIG. 6. The platform door control unit 30 includes a receiving unit 31, a door control unit 32, an acquiring unit 33, and a transmitting unit 34. The receiving unit 31 receives various signals supplied from the outside. For example, the receiving unit 31 supplies a fully open signal or a fully closed signal to the transmitting unit 34 based on a fully open position signal or a fully closed position signal received from the opening/closing detection unit 41. The door control unit 32 controls the motor 13m of the driving unit 13 in response to the open command signal or the close command signal received via the receiving unit 31 to open or close the sliding door 11. The acquiring unit 33 acquires status information, which will be described later, via the receiving unit 31. The transmitting unit 34 transmits the status information, the fully open signal, or the fully closed signal to the general control panel 50.

When using the platform door device 100 using the linear guide 20, it is necessary to maintain sufficient lubrication between the rolling surfaces of the rail 21 and the guide block 22 and the rolling body 22a. If used without sufficient lubrication, the rolling surfaces of the rail 21 and the guide block 22 will come into direct contact with the rolling body 22a, increasing wear and possibly causing flaking on the rolling surfaces of the rail 21 and the guide block 22. This will result in a shortened lifespan. For this reason, the platform door device 100 supplies lubricant between the rail 21 and the rolling body 22a to maintain sufficient lubrication, thereby suppressing wear on the rail 21 and the guide block 22.

On the other hand, the lubricant decreases or deteriorates as the rolling body 22a repeatedly moves on the rail 21 due to the opening and closing of the sliding door 11, etc. This decrease or deterioration reduces the lubricating performance of the lubricant. For this reason, in the platform door device 100, it is necessary to replenish or replace the lubricant as appropriate. Here, "replacing the lubricant" in this embodiment refers to replacing the guide block 22 itself to provide new lubricant, or overhauling the guide block 22 and removing the lubricant remaining in the lubricant supply unit 26, and then supplying the lubricant to the lubricant supply unit 26. Also, "replenishing the lubricant" in this embodiment refers to supplying the lubricant to the lubricant supply unit 26 without replacing or overhauling the guide block 22 itself.

In order to maintain good lubrication, it is necessary to shorten the interval between refilling or replacing the lubricant and refill or replace it frequently. However, if the interval between refilling or replacing is made too short, the burden on the worker performing the refilling or replacement increases. Therefore, it is necessary to refill or replace the lubricant at appropriate intervals.

In recent years, the sliding door 11 has become larger, and the travel distance and load of the guide block 22 on the rail 21 have increased even with the same number of openings and closings. As a result, there have been cases where the lubricant in the platform door device 100 has run out before it was replenished or replaced. The degree of reduction and deterioration of the lubricant also differs depending on the installation environment of the rail 21 (indoors, outdoors, etc.). In this way, the degree of reduction and deterioration of the lubricant differs for each platform door device 100 depending on the usage status and installation environment of the linear guide 20. For this reason, it is desirable to comprehensively judge the condition of the linear guide 20 of each platform door device 100 and determine the period for replenishing or replacing the lubricant.

As a method for understanding the state of the linear guide 20, for example, a method is envisaged in which the magnitude of the load on the motor 13m that drives the sliding door 11 is detected, and if an increase in the sliding resistance between the rail 21 and the guide block 22 is detected, an abnormality in the lubricant is notified. However, this sliding resistance also changes due to factors other than the state of the lubricant, such as changes in the fitting adjustment of the sliding door 11. Therefore, with this method, there is room for improvement in that it is difficult to distinguish whether a change in sliding resistance is due to poor lubrication or other factors.

In addition, by the time an increase in sliding resistance is detected, the lubricant has already been depleted or foreign matter has been mixed into the lubricant, and wear of the rail 21 and guide block 22 has progressed in many cases. Therefore, there is room for improvement in preventing the shortening of the lifespan of the linear guide 20.

Based on the above, we will explain the operation of the platform door device 100 of this embodiment.

Operation S10 by the platform door control unit 30 of the platform door device 100 of this embodiment will be described with reference to the flowchart in Figure 7. Operation S10 is repeatedly executed at regular intervals (e.g., every 10 milliseconds).

In S11, the acquisition unit 33 determines whether or not an acquisition command has been received from the general control panel 50 via the receiving unit 31 to cause the platform door device 100 to acquire status information. In this embodiment, the general control panel 50 transmits an acquisition command to the acquisition unit 33 of each platform door control unit 30 in response to receiving a fully closed signal from all platform door control units 30. If an acquisition command is not received (N in S11), operation S10 ends. If an acquisition command is received (Y in S11), operation S10 proceeds to S12. Note that the general control panel 50 may transmit an acquisition command to the acquisition unit 33 of one platform door control unit 30 in response to receiving a fully closed signal from that platform door control unit 30.

In S12, the acquisition unit 33 acquires status information regarding the state of the lubricant present between the rail 21 and the rolling element 22a. In S12, the acquisition unit 33 supplies a detection command to the status detection unit 43, and acquires the detection data supplied from the status detection unit 43 in response to the detection command as status information. The status information in this embodiment indicates the state of the lubricant adhering to the rail 21. Specifically, the status information in this embodiment indicates the film thickness of the lubricant adhering to the rail 21. The status information includes the value of a status parameter indicating the state of the lubricant. The status parameter in this embodiment is the film thickness of the lubricant adhering to the rail 21.

Here, in the above state information, "obtaining state information regarding the state of the lubricant present between the rail 21 and the rolling body 22a" includes both directly obtaining the state of the lubricant present between the rail 21 and the rolling body 22a and indirectly obtaining the state of this lubricant. "The lubricant present between the rail 21 and the rolling body 22a" includes the lubricant on the surface of the rail 21. "Indirectly obtaining the state of the lubricant present between the rail 21 and the rolling body 22a" means obtaining the state of the lubricant present between the rail 21 and the rolling body 22a based on the state of the lubricant present other than between the rail 21 and the rolling body 22a. This state information may also be for estimating the state of the lubricant.

Next, the detection mode of the film thickness sensor 43a in this embodiment will be described. As described above, by using the linear guide 20, lubricant is applied to the surface of the rail 21. When the remaining amount of lubricant in the lubricant supply unit 26 decreases and the amount of lubricant supplied between the rail 21 and the rolling element 22a decreases, the film thickness of the lubricant adhering to the rail 21 becomes thinner. Therefore, by measuring this film thickness, the remaining amount of lubricant in the lubricant supply unit 26 can be grasped.

The acquisition unit 33 supplies the acquired status information to the transmission unit 34, and operation S10 proceeds to S13.

In S13, the transmitter 34 transmits the acquired status information to the general control panel 50. In this embodiment, the general control panel 50 displays the film thickness of the lubricant adhering to the rail 21 on the station office display device 64 and the general command room display device 65 based on the received status information. After S13, operation S10 ends.

According to this embodiment, the state of the lubricant present between the rail 21 and the rolling element 22a can be directly obtained, so that the lubricating performance of the lubricant can be accurately grasped. In particular, in this embodiment, the film thickness of the lubricant adhering to the rail 21 is obtained as the state of the lubricant. Therefore, the worker can grasp the remaining amount of lubricant in the lubricant supply unit 26 and can decide whether or not to perform lubricant replenishment work.

In this embodiment, the acquisition unit 33 acquires the status information in response to receiving an acquisition command from the general control panel 50 to cause the platform door device 100 to acquire status information. The transmission unit 34 transmits the acquired status information to the general control panel 50. With this configuration, it is possible to monitor the status of the lubricant in cooperation with the general control panel 50. In addition, since there is no need to provide a separate storage unit in the platform door control unit 30 for storing status information, the platform door control unit 30 can be made less expensive.

In this embodiment, the condition detection unit 43 is provided inside the door pocket 10. This configuration makes it possible to obtain condition information at a location where foreign matter such as dirt, dust, and rain is relatively unlikely to get mixed into the lubricant, thereby preventing a deterioration in detection accuracy.

[Modification]
In the present embodiment, the platform door device 100 installed on a platform of a vehicle is taken as an example, but is not limited thereto. For example, the present invention may be a sliding door device for opening and closing an entrance and exit of a factory.

In this embodiment, the acquisition command is transmitted in response to the general control panel 50 receiving a fully closed signal in S11 and S12, but this is not limited thereto, and the acquisition command may be transmitted in response to the general control panel 50 receiving a fully open signal. Alternatively, the acquisition command may be transmitted in response to the reception of each of the fully open signal and the fully closed signal.

In this embodiment, the acquisition unit 33 supplies a detection command in response to receiving an acquisition command, but is not limited to this. The acquisition unit 33 may supply a detection command when the opening/closing detection unit 41 detects at least one of the fully open and fully closed states of the sliding door 11. In this case, the state information indicates the state of the lubricant detected by the state detection unit 43 provided between the door leading guide block 22Ua (22La) and the door trailing guide block 22Ub (22Lb) when the opening/closing detection unit 41 detects at least one of the fully open and fully closed states of the sliding door 11. According to this configuration, even when one state detection unit 43 is used, the lubrication state of the door leading guide block 22Ua (22La) can be grasped at the completion of the opening operation, and the lubrication state of the door trailing guide block (22Lb) can be grasped at the completion of the closing operation.

In this embodiment, the rail 21 is fixed to the sliding door 11, but this is not limited thereto, and the rail 21 may also be fixed to the door pocket 10.

[Second embodiment]
A second embodiment of the present invention will be described below. In the drawings and description of the second embodiment, the same or equivalent components and members as those of the first embodiment are denoted by the same reference numerals. Explanations that overlap with the first embodiment will be omitted as appropriate, and the description will focus on the configurations that differ from the first embodiment.

See Figures 2 and 3. In this embodiment, the state detection unit 43 includes a color measurement sensor 43b. The color measurement sensor 43b outputs color values in a predetermined color system, such as chromaticity, brightness, saturation, and hue, based on the spectrum of reflected light when light is irradiated onto the lubricant. The color measurement sensor 43b measures the color value of the lubricant adhering to the rail 21. The color measurement sensor 43b in this embodiment is provided between the door leading guide block 22Ua (22La) and the door trailing guide block 22Ub (22Lb), similar to the film thickness sensor 43a described above. The color measurement sensor 43b in this embodiment is a photoelectric sensor.

The state information in this embodiment indicates the color of the lubricant adhering to the rail 21. The state parameter in this embodiment is the color of the lubricant adhering to the rail 21. As described above, a lubricant is applied to the surface of the rail 21 by using the linear guide 20. This applied lubricant may deteriorate physically due to the inclusion of foreign matter such as wear powder, moisture, and dust, or may deteriorate chemically due to changes in quality accompanied by chemical reactions such as oxidation and hydrolysis of the components of the lubricant. Most of the lubricant that has deteriorated on the rail 21 is scraped off by the lip portion 25 during the opening and closing of the sliding door 11, so it hardly gets into the inside of the guide block 22. However, there are cases where only a very small amount of the deteriorated lubricant is not scraped off by the lip portion 25 and gets into the inside of the guide block 22. As a result, the lubricant inside the guide block 22 deteriorates by mixing with the lubricant that has been mixed in from the outside. When the lubricant deteriorates, its brightness decreases. Therefore, in this embodiment, the colorimetric sensor 43b detects the color value of the lubricant adhering to the rail 21. This allows the degree of deterioration of the lubricant in the lubricant supply unit 26 to be understood. This allows the worker to determine whether or not to replace the lubricant based on the condition of the lubricant.

In this embodiment, the status information includes one status parameter (the color of the lubricant), but is not limited to this and may include multiple status parameters, such as both the film thickness and color of the lubricant.

[Third embodiment]
A third embodiment of the present invention will be described below. In the drawings and description of the third embodiment, the same or equivalent components and members as those of the first embodiment are denoted by the same reference numerals. Descriptions that overlap with those of the first embodiment will be omitted as appropriate, and the description will focus on the configurations that differ from those of the first embodiment.

Refer to FIG. 8. The state detection unit 43 in this embodiment includes a resistance detection sensor 43c. As shown in FIG. 8, an insulating material 28 is provided on the guide block 22 to insulate the rail 21 and guide block 22 from the door pocket 10 and the sliding door 11. An electrode 27 is connected to the door leading guide block 22Ua (22La) and the door trailing guide block 22Ub (22Lb), and a current is applied to the rail 21 and guide block 22 via this electrode 27. The resistance detection sensor 43c detects the resistance value when a current is applied to the rail 21 and guide block 22 in this manner.

The state information in this embodiment indicates the resistance value measured when a current is applied to the rail 21 and the guide block 22. The state parameter in this embodiment is this resistance value. The lubricant has a relatively high resistance value and does not easily pass a current. Therefore, when a sufficient amount of lubricant remains in the lubricant supply unit 26 and a sufficiently thick lubricant film is formed on the rail 21 and the rolling body 22a, the resistance value is relatively high. On the other hand, when the film thickness of the lubricant adhering to the rail 21 becomes thin due to a decrease in the lubricant, the resistance value becomes relatively small. In addition, when wear powder from the rail 21, etc. is mixed into the lubricant, the resistance value becomes small. Therefore, by detecting this resistance value, the remaining amount and degree of deterioration of the lubricant adhering to the rail 21 can be grasped.

In this embodiment, the resistance value is detected during the opening or closing operation of the sliding door 11. When the sliding door 11 is stopped (when the sliding door 11 is fully closed or fully open), the lubricant between the rail 21 and the rolling body 22a is pushed out and the rail 21 and the rolling body 22a come into contact. Therefore, in this stopped state, the resistance value is relatively small. On the other hand, when the sliding door 11 moves in the opening or closing direction, the lubricant is supplied between the rail 21 and the rolling body 22a, so the resistance value is relatively large. However, when the lubricant supply unit 26 runs out of lubricant and the amount of lubricant supplied decreases, the thickness of the lubricant film between the rail 21 and the rolling body 22a becomes small and the resistance value becomes relatively high.

According to this embodiment, by detecting the resistance value during the opening or closing operation of the sliding door 11, it is possible to confirm whether lubrication is being performed effectively during the opening or closing operation. In addition, according to this embodiment, the device can be constructed using only a power source and electrodes, making it possible to realize an inexpensive and highly reliable platform door device 100.

The state information may also include the resistance value (frequency-resistance characteristic) against frequency, which is measured when the frequency of the current is changed when a current is applied to the rail 21 and the guide block 22. This makes it possible to estimate the specific state of deterioration, such as oxidation or moisture contamination.

[Fourth embodiment]
A fourth embodiment of the present invention will be described below. In the drawings and description of the fourth embodiment, the same or equivalent components and members as those of the first embodiment are denoted by the same reference numerals. Descriptions that overlap with those of the first embodiment will be omitted as appropriate, and the description will focus on the configurations that differ from those of the first embodiment.

Refer to FIG. 9. The state detection unit 43 in this embodiment includes a weight sensor 43d. The weight sensor 43d measures the weight of the lubricant that falls from the rail 21 due to the movement of the sliding door 11 in the opening and closing direction. The weight sensor 43d in this embodiment measures the weight of the lubricant that has accumulated in the receiving portion 29. The weight sensor 43d is, for example, a load cell.

In this embodiment, a receiving portion 29 is provided below the lip portion 25 of the oil seal 24 to receive the lubricant that falls from the rail 21 due to the movement of the sliding door 11 in the opening and closing direction. For example, the receiving portion 29 can receive the lubricant that falls from the boundary portion between the rail 21 and the lip portion 25 by being scraped off by the lip portion 25. The receiving portion 29 is provided on the guide block 22 so as to be positioned below the lip portion 25. For example, the receiving portion 29 provided on the leading edge guide block 22Ua (22La) is positioned below the lip portion 25 of the oil seal 24 on the leading edge side of the leading edge guide block 22Ua (22La). The receiving portion 29 provided on the trailing edge guide block 22Ub (22Lb) is positioned below the lip portion 25 of the oil seal 24 on the trailing edge side of the trailing edge guide block 22Ub (22Lb).

The state information in this embodiment does not indicate the state of the lubricant adhering to the rail 21 as in the above embodiment, but indicates the state of the lubricant peeled off from the rail 21. Specifically, the state information in this embodiment indicates the weight of the lubricant accumulated in the receiving portion 29. The state parameter in this embodiment is the weight of the lubricant accumulated in the receiving portion 29. When the linear guide 20 is used by opening and closing the sliding door 11, the lubricant in the lubricant supply path 26b is supplied between the rail 21 and the rolling body 22a. Therefore, the remaining amount of lubricant in the lubricant supply path 26b decreases each time the sliding door 11 is opened and closed. In addition, the lubricant is applied to the rail 21 through the rolling body 22a at the sliding point with the rolling body 22a by opening and closing the sliding door 11. Therefore, the lubricant is adhered to the entire surface of the rail 21. The lubricant adhering to the surface of the rail 21 is scraped off by the lip portion 25 that is in close contact with the rail 21 without any gaps by opening and closing the sliding door 11. The lubricant scraped off by the lip portion 25 and accumulated in the oil seal 24 due to repeated sliding movement on the rail 21 falls from the rail 21 or the guide block 22 due to its own weight. It is considered that the remaining amount of lubricant in the lubricant supply unit 26 is reduced by the weight of this fallen lubricant. Therefore, in this embodiment, the weight sensor 43d measures the weight of this fallen lubricant. This makes it possible to grasp the remaining amount of lubricant in the lubricant supply unit 26.

In this embodiment, the state of the lubricant that has fallen from the rail 21 is obtained as state information, and the state of the lubricant that exists between the rail 21 and the rolling element 22a is indirectly obtained. According to this embodiment, the state of the lubricant can be grasped using a relatively simple detection system.

In this embodiment, the acquisition unit 33 acquires the weight of the lubricant that falls from the rail 21 when the lubricant adhering to the rail 21 is scraped off by the lip portion 25. With this configuration, the state of the lubricant can be grasped with a simple configuration without using a complex detection system such as an optical sensor.

In this embodiment, the receiving portion 29 is provided on the guide block 22 so as to be positioned below the oil seal 24 (e.g., below the lip portion 25). Here, when the sliding door 11 is fully opened or fully closed, the sliding door 11 stops, and the vibration of the sliding door 11 when it stops makes it easier for the lubricant to fall from the lip portion 25. As a result, the lubricant tends to accumulate under the guide block 22. With this configuration, it is possible to accurately detect the weight of the lubricant that has fallen from the rail 21. As a result, it is possible to more accurately grasp the remaining amount of lubricant.

In this embodiment, the receiving portion 29 is provided on the guide block 22, but this is not limited and may be provided on the door pocket 10. The receiving portion 29 may also be embedded in the base below the guide block 22 or the floor below the rail 21.

The sliding door 11 may also be provided with a receiving portion 29. In this case, as shown in Figs. 10(a) and (b), the receiving portion 29 may be provided on the leading edge and trailing edge of the sliding door 11 so as to be positioned under the oil seal 24 when the sliding door 11 is fully closed and fully open. The receiving portion 29 may be provided on only one of the leading edge and trailing edge of the sliding door 11.

The status information in this embodiment indicates the weight of the lubricant, but is not limited to this. For example, the status information may indicate at least one of the contact area of the lubricant with respect to the surface with which the lubricant falls from the rail 21 comes into contact, the volume of the lubricant that has fallen from the rail 21, and the cumulative value of the impact load caused by the lubricant falling. These also make it possible to grasp the remaining amount of lubricant.

When acquiring the contact area or volume of the lubricant, the contact area or volume may be detected using an image sensor 43e such as a camera as the state detection unit 43. In this case, the image sensor 43e is arranged at a position where the lubricant under the rail 21 can be photographed within the movement range of the rail 21 in the opening and closing direction. For example, the image sensor 43e is arranged so that the entrance E and the inside of the door pocket 10 are included in the field of view. Specifically, as shown in Figs. 11(a) and (b) and 12, the image sensor 43e may be arranged in the door pocket 10 and the door end support part 12 so that the floors of the entrance E and the floors of the door pocket 10 are the receiving parts 29. This allows the lubricant that has fallen from the rail 21 during the opening and closing operation and accumulated on the floor of the entrance E and the floor of the door pocket 10 to be monitored. The image sensor 43e may be arranged at a position where the upper surface of the lower frame 15L can be photographed. This allows the lubricant that has fallen from the rail 21U and accumulated on the upper surface of the lower frame 15L to be monitored. Furthermore, the image sensor 43e may be placed in a position that allows it to capture an image of the lubricant accumulated in the receiving portion 29, which is placed in the position shown in Figures 9, 10(a) and (b). This allows the lubricant that has fallen from the lip portion 25 and accumulated in the receiving portion 29 to be monitored.

When acquiring the cumulative value of the impact load, a piezoelectric impact detection sensor (not shown) that converts the impact load applied to the receiving portion 29 into a voltage signal may be used. In this case, the cumulative value of the impact load may be detected by calculating the sum of the voltage signals from when the lubricant accumulated in the receiving portion 29 was removed by inspection or the like until the present.

The status information may also indicate the viscosity of the lubricant accumulated in the receiving portion 29. The lubricant deteriorates due to the inclusion of moisture or decomposition over time, and as the viscosity of the lubricant decreases, the lubricating performance also decreases. Therefore, by acquiring the viscosity of the lubricant, the degree of deterioration of the lubricant can be grasped. In this case, for example, the viscosity of the lubricant accumulated in the receiving portion may be detected by a rotational viscometer. The status information may also indicate the color of the lubricant accumulated in the receiving portion 29.

[Fifth embodiment]
Hereinafter, a fifth embodiment of the present invention will be described. In the drawings and description of the fifth embodiment, the same or equivalent components and members as those of the first embodiment are denoted by the same reference numerals. Explanations that overlap with the first embodiment will be omitted as appropriate, and the description will focus on the configurations that differ from the first embodiment.

Refer to FIG. 13. The home door control unit 30 of this embodiment includes an acquisition unit 33, a transmission unit 34, an information generation unit 35, and a storage unit 36. The information generation unit 35 of this embodiment generates remaining amount information indicating the remaining amount of lubricant in the lubricant supply unit 26 and deterioration information indicating the degree of deterioration of the lubricant. The storage unit 36 stores first correspondence data 36a indicating the correspondence relationship between the remaining amount of lubricant and the difference between the film thickness value of the lubricant and a reference value set for this film thickness, and second correspondence data 36b indicating the correspondence relationship between the color value of the lubricant and the degree of deterioration of the lubricant and the difference between the color value of the lubricant and a reference value set for this color value.

The operation S30 by the platform door control unit 30 of the platform door device 100 of this embodiment will be described with reference to the flowchart in Figure 14. In operation S30, the processing of S31 and S32 is the same as S11 and S12 described above unless otherwise noted, and therefore the description thereof will be omitted.

When the acquisition unit 33 supplies the status information to the information generation unit 35 in S32, the information generation unit 35 generates remaining amount information indicating the remaining amount of lubricant present between the rail 21 and the rolling element 22a based on the lubricant film thickness value in the acquired status information in S33. Specifically, the information generation unit 35 generates the remaining amount information based on a comparison between the lubricant film thickness value in the status information and a reference value. For example, the information generation unit 35 calculates the difference between the film thickness value and the reference value, and determines the remaining amount value of lubricant corresponding to the difference based on the first correspondence data 36a. The information generation unit 35 generates the determined remaining amount value as remaining amount information.

In addition, in S33, the information generating unit 35 generates deterioration information indicating the degree of deterioration of the lubricant present between the rail 21 and the rolling element 22a based on the color value of the lubricant in the acquired status information. Specifically, the information generating unit 35 generates the deterioration information based on a comparison between the color value of the lubricant in the status information and a reference value. For example, the information generating unit 35 calculates the difference between the color value and the reference value, and determines the deterioration degree of the lubricant corresponding to the difference based on the second correspondence data 36b. The information generating unit 35 generates the determined degree of deterioration as deterioration information.

The reference value is set based on at least one of the following: the length of the sliding door 11 in the opening/closing direction, the number of times the sliding door 11 is opened and closed within a specified period, the presence or absence of a roof at the installation location of the platform door device 100, and the temperature at the installation location of the platform door device 100. If the length of the sliding door 11 in the opening/closing direction is large or the number of times the sliding door 11 is opened and closed within a specified period is large, it is likely that the total movement distance of the sliding door 11 during the specified period will be large. The viscosity of the lubricant changes depending on the temperature at the installation location of the platform door device 100. If there is no roof at the installation location of the platform door device 100, the platform door device 100 will be exposed to rain and wind, and foreign matter such as moisture and dust will easily get mixed into the lubricant. Therefore, by setting the reference value based on at least one of the above length, the number of times the sliding door 11 is opened and closed within a specified period, it is possible to take into account the effects of the above length, the number of times the sliding door 11 is opened and closed, the presence or absence of a roof, and the temperature, making it possible to accurately obtain the state of the lubricant.

The information generating unit 35 supplies the generated remaining amount information and deterioration information to the transmitting unit 34, and operation S30 proceeds to S34. In S34, the transmitting unit 34 transmits the remaining amount information and deterioration information to the general control panel 50. In this embodiment, the general control panel 50 displays the remaining amount of lubricant and the degree of deterioration of the lubricant on the station office display device 64 and the general command room display device 65 based on the received remaining amount information and deterioration information. This allows workers to decide whether to replenish or replace the lubricant based on the remaining amount value and the degree of deterioration of the lubricant.

According to this embodiment, the remaining amount and degree of deterioration of the lubricant present between the rail 21 and the rolling element 22a can be grasped. As a result, it is possible to specifically grasp the lubricating performance of the lubricant based on the remaining amount and degree of deterioration of this lubricant. Therefore, it becomes possible to more accurately and quickly determine whether or not the lubricant needs to be replenished or replaced.

In this embodiment, the remaining amount information and the deterioration information are generated and transmitted, but this is not limited to this. For example, one of the remaining amount information and the deterioration information may be generated and transmitted.

In the present embodiment, the remaining amount information or deterioration information is generated based on a comparison between the lubricant film thickness value or color value in the status information and a reference value, but is not limited to this. For example, the remaining amount information or deterioration information may be generated based on the film thickness value or color value using correspondence data that indicates the correspondence between the remaining amount or deterioration degree of the lubricant and the lubricant film thickness value or color value, without comparison with a reference value. Furthermore, the remaining amount information is generated using the lubricant film thickness, but is not limited to this, and the weight of the lubricant, the resistance value, the contact area, the volume, and the impact load may be used. The deterioration information is generated using the lubricant color, but is not limited to this, and the viscosity and the resistance value may be used.

Sixth Embodiment
A sixth embodiment of the present invention will be described below. In the drawings and description of the sixth embodiment, the same or equivalent components and members as those of the fifth embodiment are denoted by the same reference numerals. Descriptions that overlap with the fifth embodiment will be omitted as appropriate, and the description will focus on the configurations that differ from the fifth embodiment.

Refer to FIG. 15. In this embodiment, the information generating unit 35 generates refill information indicating whether or not the lubricant needs to be refilled, and replacement information indicating whether or not the lubricant needs to be replaced. The memory unit 36 stores a reference value for the film thickness of the lubricant and a reference value for the color value of the lubricant.

The operation S50 by the platform door control unit 30 of the platform door device 100 of this embodiment will be described with reference to the flowchart in Figure 16. In operation S50, the processing of S51 and S52 is the same as S11 and S12 described above unless otherwise noted, and therefore the description thereof will be omitted.

When the acquisition unit 33 supplies the status information to the information generation unit 35 in S52, the information generation unit 35 generates replenishment necessity information based on the lubricant film thickness value in the acquired status information in S53. Specifically, the information generation unit 35 generates replenishment necessity information based on a comparison between the lubricant film thickness value in the status information and a reference value. For example, when the film thickness value is smaller than the reference value, the information generation unit 35 generates replenishment necessity information indicating that lubricant replenishment is necessary. When the film thickness value is equal to or greater than the reference value, the information generation unit 35 generates replenishment necessity information indicating that lubricant replenishment is not necessary.

In addition, in S53, the information generating unit 35 generates replacement necessity information based on the color value of the lubricant in the acquired status information. Specifically, the information generating unit 35 generates replacement necessity information based on a comparison between the color value of the lubricant in the status information and a reference value. For example, when the color value of the lubricant is greater than the reference value, the information generating unit 35 generates replacement necessity information indicating that the lubricant needs to be replaced. When the film thickness value is equal to or less than the reference value, the information generating unit 35 generates replenishment necessity information indicating that the lubricant does not need to be replaced.

The information generating unit 35 supplies the generated refill necessity information and replacement necessity information to the transmitting unit 34, and operation S50 proceeds to S54. In S54, the transmitting unit 34 transmits the refill necessity information and replacement necessity information to the general control panel 50. In this embodiment, the general control panel 50 displays the need for refilling and replacing the lubricant on the station office display device 64 and the general command room display device 65 based on the refill recommendation information and replacement recommendation information. This allows workers to determine whether to refill or replace the lubricant based on the need for refilling and replacing the lubricant. In this way, according to this embodiment, it is possible to grasp the need for refilling and replacing the lubricant.

In this embodiment, the replenishment necessity information and the replacement necessity information are generated and transmitted, but this is not limited thereto, and either the replenishment necessity information or the replacement necessity information may be generated and transmitted.

In this embodiment, the refill necessity information and the replacement necessity information are generated, but the present invention is not limited to this. For example, refill timing information indicating the timing of refilling the lubricant may be generated based on the difference between the lubricant film thickness value and the reference value, and replacement timing information indicating the timing of replacing the lubricant may be generated based on the difference between the lubricant color value and the reference value. In this case, the storage unit 36 may store correspondence data indicating the correspondence relationship between the difference between the lubricant film thickness value and the reference value and the period until the lubricant is refilled, or the correspondence relationship between the difference between the lubricant color value and the reference value and the period until the lubricant is replaced. The information generating unit 35 may also generate refill timing information or replacement timing information by calculating the above difference and determining the period until the lubricant is refilled or replaced corresponding to the difference based on the correspondence data.

For example, the information generating unit 35 may generate replenishment recommendation information to notify the user that it is recommended to replenish the lubricant when the lubricant film thickness value is equal to or less than a reference value. The information generating unit 35 may generate replacement recommendation information to notify the user that it is recommended to replace the lubricant when the lubricant color value is equal to or greater than a reference value. The transmitting unit 34 may transmit at least one of the replenishment recommendation information and the replacement recommendation information to the general control panel 50.

The information generating unit 35 may generate at least one of remaining amount information, deterioration information, refilling necessity information, and replacement necessity information. The transmitting unit 34 may transmit at least one of status information, remaining amount information, deterioration information, refilling necessity information, and replacement necessity information to the general control panel 50.

[Seventh embodiment]
A seventh embodiment of the present invention will be described below. In the drawings and description of the seventh embodiment, the same or equivalent components and members as those of the first embodiment are denoted by the same reference numerals. Descriptions that overlap with those of the first embodiment will be omitted as appropriate, and the description will focus on the configurations that differ from those of the first embodiment.

Refer to FIG. 17. The acquisition device 70 of this embodiment includes an acquisition unit 33, a transmission unit 34, an acquisition device receiving unit 37, a status detection unit 43, and an attachment unit 71 for attaching the acquisition device 70 to the platform door device 100. In this embodiment, the acquisition device 70 is attached to the platform door device 100 via the attachment unit 71. The acquisition device 70 is not connected to the general control panel 50, but is connected to a vehicle information transmission device 63, a station staff operation panel 66, and an acquisition device display device 72.

The acquisition device receiver 37 receives a close request signal or an open request signal from the vehicle information transmission device 63 and the station staff operation panel 66. In response to receiving a close request signal or an open request signal via the acquisition device receiver 37, the acquisition device 33 supplies a detection command to the status detection unit 43. The close request signal or the open request signal is an example of an open or close signal for starting the opening and closing operation of the sliding door 11. The transmission unit 34 transmits the status information to the acquisition device display device 72.

The display device 72 for the acquisition device is provided independently of the station office display device 64 and the general command room display device 65. The display device 72 for the acquisition device is a display device dedicated to the acquisition device 70, which is realized by a PC (Personal Computer), a PDA (Personal Digital Assistant), a smartphone, a tablet terminal, etc.

The operation S70 performed by the acquisition device 70 of this embodiment will be described with reference to the flowchart in FIG. 18. In operation S70, the processes of S71 and S72 are similar to the above-mentioned S11 and S12 unless otherwise noted, and therefore the description thereof will be omitted as appropriate.

In S71, the acquisition unit 33 determines whether or not a close request signal or an open request signal has been received via the acquisition device receiver 37. If a close request signal or an open request signal has not been received (N in S71), operation S70 ends. If a close request signal or an open request signal has been received (Y in S71), operation S70 proceeds to S72.

After the status information is acquired in S72, in S73 the transmission unit 34 transmits the acquired status information to the acquisition device display device 72. In this embodiment, the acquisition device display device 72 displays the state of the lubricant (film thickness, etc.) based on the received status information. After S73, operation S70 ends.

According to this embodiment, it is possible to attach the acquisition device 70 to the platform door device 100 even after the platform door device 100 has been installed. Therefore, even if the platform door device 100 does not have the function to acquire status information at the time of its installation, it is possible to give it this acquisition function after installation.

In addition, according to this embodiment, the acquisition device 70 acquires status information in conjunction with a close request signal or an open request signal from the station attendant operation panel 66 and the vehicle information transmission device 63, without directly exchanging information with the general control panel 50. As a result, it becomes possible to acquire lubricant status information without the need to modify the existing general control panel 50, such as by updating the program of the general control panel 50. Therefore, this embodiment can be easily given the function of acquiring status information, and is therefore suitable for use in cases such as temporarily monitoring the status of a lubricant.

In this embodiment, the status information is transmitted by the transmission unit 34, but this is not limited thereto, and a memory unit 36 may be provided and the status information may be stored in the memory unit 36.

[Eighth embodiment]
Hereinafter, an eighth embodiment of the present invention will be described. In the drawings and description of the eighth embodiment, the same or equivalent components and members as those of the seventh embodiment will be denoted by the same reference numerals. Descriptions that overlap with the seventh embodiment will be omitted as appropriate, and the description will focus on the configuration that differs from the seventh embodiment.

Refer to FIG. 19. The acquisition device 70 of this embodiment is not connected to the station staff operation panel 66, the ground coil 62, and the vehicle information transmission device 63 as in the seventh embodiment, but is connected to the open/close detection unit 41 of the platform door device 100. The acquisition device receiver 37 receives a fully closed position signal and a fully open position signal from the open/close detection unit 41. The acquisition unit 33 acquires status information in response to detection of the fully closed or fully open state of the sliding door 11. For example, the acquisition unit 33 acquires status information when it receives a fully closed position signal or a fully open position signal via the acquisition device receiver 37.

The operation S80 performed by the acquisition device 70 of this embodiment will be described with reference to the flowchart in FIG. 20. In operation S80, the processes of S82 and S83 are similar to the above-described S72 and S73, and therefore will not be described.

In S81, the acquisition unit 33 determines whether the open/close detection unit 41 has detected the sliding door 11 to be fully closed or fully open. For example, when the acquisition unit 33 receives a fully closed position signal or a fully open position signal from the open/close detection unit 41, it determines that the sliding door 11 has been detected to be fully closed. If a fully closed or fully open state is not detected (N in S81), operation S80 ends. If a fully closed or fully open state is detected (Y in S81), operation S80 proceeds to S82.

According to this embodiment, the acquisition unit 33 acquires status information in conjunction with the open/close detection unit 41 detecting that the sliding door 11 is fully closed or fully open. This embodiment provides the same effects and advantages as the seventh embodiment.

In this embodiment, the status information is acquired when the opening/closing detection unit 41 detects that the sliding door 11 is fully closed, but this is not limited thereto, and the status information may be acquired when the opening/closing detection unit 41 detects at least one of the sliding door 11 being fully closed and fully open.

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

1 Platform door system, 10 Door pocket, 11 Sliding door, 13 Drive unit, 20 Linear guide, 21 Rail, 22 Guide block, 22a Rolling body, 30 Platform door control unit, 33 Acquisition unit, 34 Transmission unit, 35 Information generation unit, 43 Status detection unit, 50 General control panel, 100 Platform door device.

Claims (22)

A sliding door that is movable in an opening/closing direction relative to a door pocket;
a rail fixed to the door pocket or the sliding door and extending in the opening and closing direction;
a guide block for holding a rolling element that contacts the rail;
an acquisition unit that acquires status information regarding a status of a lubricant present between the rail and the rolling elements;
Equipped with
A sliding door device , wherein the status information indicates a film thickness of the lubricant adhering to the rail . The sliding door device according to claim 1 , wherein the status information indicates a color of the lubricant adhering to the rail. 3. The sliding door device according to claim 1 , wherein the state information indicates a resistance value measured when a current is applied to the rail and the guide block during an opening or closing operation of the sliding door. An opening/closing detection unit is provided for detecting whether the sliding door is fully closed or fully open,
The guide block includes a door leading side guide block provided on the door leading side of the sliding door, and a door trailing side guide block provided on the door trailing side of the sliding door aligned with the door leading side guide block in the opening and closing direction,
3. The sliding door device according to claim 1, wherein the state information indicates a state of the lubricant detected by a state detection unit provided between the door leading side guide block and the door trailing side guide block when the opening/closing detection unit detects at least one of the fully open and the fully closed state. A sliding door that is movable in an opening/closing direction relative to a door pocket;
a rail fixed to the door pocket or the sliding door and extending in the opening and closing direction;
a guide block for holding a rolling element that contacts the rail;
an acquisition unit that acquires status information regarding a status of a lubricant present between the rail and the rolling elements;
Equipped with
A sliding door device, wherein the status information indicates a status of the lubricant peeled off from the rail. 6. The sliding door device according to claim 5, wherein the status information indicates at least one of a weight of the lubricant that has fallen from the rail due to movement of the sliding door in the opening and closing direction, a contact area of the lubricant with the surface onto which the lubricant has fallen, a volume of the fallen lubricant, and a cumulative value of an impact load caused by the fall of the lubricant. The sliding door device according to claim 5 , wherein the state information indicates at least one of a color of the lubricant that has fallen from the rail due to movement of the sliding door in the opening and closing direction and a viscosity of the fallen lubricant. a receiving portion for receiving the lubricant that falls from the rail due to movement of the sliding door in the opening and closing direction;
an oil seal that seals a gap between the guide block and the rail,
The receiving portion is provided below the oil seal,
The sliding door device according to claim 5 , wherein the state information indicates a state of the lubricant accumulated in the receiving portion. The sliding door device according to claim 8 , wherein the receiving portion is provided on the door pocket or the guide block so as to be positioned below the oil seal. The sliding door device according to claim 8 , wherein the receiving portion is provided on the sliding door so as to be positioned below the oil seal when the sliding door is at least one of fully closed and fully open. The sliding door device according to claim 5 , wherein the status information indicates a state of the lubricant detected using an imaging sensor that captures an image of the lubricant under the rail within a range of movement of the rail in the opening and closing direction . The sliding door device according to claim 1 , further comprising an information generating unit that generates remaining amount information on a remaining amount of the lubricant based on the state information. The sliding door device according to claim 1 , further comprising an information generating unit configured to generate replenishment necessity information indicating whether or not the lubricant needs to be replenished based on the state information. The sliding door device according to claim 2 , further comprising an information generating unit that generates deterioration information relating to a degree of deterioration of the lubricant based on the state information. The sliding door device according to claim 2 , further comprising an information generating unit configured to generate deterioration necessity information indicating the necessity of replacing the lubricant based on the state information. The sliding door device according to claim 1 , wherein the state information indicates a state of the lubricant detected by a state detection unit provided in the door pocket. the status information includes a status parameter indicating a status of the lubricant,
the sliding door device includes an information generating unit that generates at least one of remaining amount information on a remaining amount of the lubricant, deterioration information on a degree of deterioration of the lubricant, replenishment necessity information indicating whether or not the lubricant needs to be replenished, and replacement necessity information indicating whether or not the lubricant needs to be replaced, based on a comparison between a value of the state parameter and a reference value;
The sliding door device according to any one of claims 1 to 16, wherein the reference value is set based on at least one of the length of the sliding door in the opening and closing direction, the number of times the sliding door is opened and closed within a specified period of time, the presence or absence of a roof at an installation location of the sliding door device, and the air temperature at the installation location. The sliding door device is a platform door device installed on a platform,
The sliding door device includes an information generating unit that generates, based on the state information, at least one of remaining amount information on a remaining amount of the lubricant, deterioration information on a deterioration degree of the lubricant, replenishment necessity information indicating whether or not the lubricant needs to be replenished, and replacement necessity information indicating whether or not the lubricant needs to be replaced;
a receiving unit that receives an acquisition command for acquiring the status information from a general control panel that outputs an open or close command signal for opening or closing the sliding door;
a transmitter that transmits at least one of the status information, the remaining amount information, the deterioration information, the replenishment necessity information, and the replacement necessity information to the integrated control panel,
The sliding door device according to claim 1 , wherein the acquisition unit acquires the status information in response to receiving the acquisition command from the general control panel. A sliding door that is movable in an opening/closing direction relative to a door pocket;
a rail fixed to the door pocket or the sliding door and extending in the opening and closing direction;
a guide block for holding a rolling element that contacts the rail;
A platform door control unit that controls the opening and closing of the sliding door;
An acquisition device for use in a platform door device comprising:
An attachment unit for attaching the acquisition device to the platform door device;
A receiver for an acquisition device that receives at least one of an open signal and a close signal for causing the platform door control unit to start the opening and closing operation of the sliding door;
an acquisition unit that acquires status information regarding a status of a lubricant present between the rail and the rolling elements in response to receiving at least one of the open and close signals;
Equipped with
The status information indicates a film thickness of the lubricant on the rail . A sliding door that is movable in an opening/closing direction relative to a door pocket;
a rail fixed to the door pocket or the sliding door and extending in the opening and closing direction;
a guide block for holding a rolling element that contacts the rail;
A platform door control unit that controls the opening and closing of the sliding door;
An acquisition device for use in a platform door device comprising:
An attachment unit for attaching the acquisition device to the platform door device;
A receiver for an acquisition device that receives at least one of an open signal and a close signal for causing the platform door control unit to start the opening and closing operation of the sliding door;
an acquisition unit that acquires status information regarding a status of a lubricant present between the rail and the rolling elements in response to receiving at least one of the open and close signals;
Equipped with
The status information indicates a status of the lubricant that has peeled off the rail. A sliding door that is movable in an opening/closing direction relative to a door pocket;
a rail fixed to the door pocket or the sliding door and extending in the opening and closing direction;
a guide block for holding a rolling element that contacts the rail;
An opening/closing detection unit that detects at least one of a full closing and a full opening of the sliding door;
A platform door control unit that controls the opening and closing of the sliding door;
An acquisition device for use in a platform door device comprising:
An attachment unit for attaching the acquisition device to the platform door device;
an acquisition unit that acquires status information relating to a status of a lubricant present between the rail and the rolling element in response to the opening/closing detection unit detecting at least one of a full closing state and a full opening state of the sliding door;
Equipped with
The status information indicates a film thickness of the lubricant on the rail . A sliding door that is movable in an opening/closing direction relative to a door pocket;
a rail fixed to the door pocket or the sliding door and extending in the opening and closing direction;
a guide block for holding a rolling element that contacts the rail;
An opening/closing detection unit that detects at least one of a full closing and a full opening of the sliding door;
A platform door control unit that controls the opening and closing of the sliding door;
An acquisition device for use in a platform door device comprising:
An attachment unit for attaching the acquisition device to the platform door device;
an acquisition unit that acquires status information relating to a status of a lubricant present between the rail and the rolling element in response to the opening/closing detection unit detecting at least one of a full closing state and a full opening state of the sliding door;
Equipped with
The status information indicates a status of the lubricant that has peeled off the rail.

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