Platform door device

Abstract

To provide a platform door device capable of avoiding pinching by doors even for a narrow object and an object which has no thickness, and capable of reducing a wind pressure passing through a gap between movable doors, with a simple configuration.SOLUTION: A platform door device 3A includes a pair of movable doors 4, 5 openable / closable in a direction A1. When a reference line SL along the direction A1 is set, a door end portion 41 of one movable door 4 is installed on a vehicle C side with respect to the reference line SL, and a door end portion 51 of the other movable door 5 is installed on the opposite side from the vehicle C with respect to the reference line SL. The movable doors 4 and 5 include protrusion parts 43 and 53, respectively. A top part 44 of the protrusion part 43 of the movable door 4 is positioned closer to a second virtual plane P2 than a top part 54 of the protrusion part 53 of the movable door 5. The protrusion part 43 of the movable door 4 is provided at a position which does not interfere with the protrusion part 53 of the movable door 5 in an opening / closing operation of the movable doors 4, 5.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a platform door device. [Background technology]

[0002] Patent Documents 1 to 5 disclose technologies related to platform doors installed on railway station platforms. In the technologies described in Patent Documents 1 and 2, when an obstacle outside the detection range of a door edge sensor becomes caught in the door after the door has closed, the obstacle is moved or otherwise detected by the door edge sensor. Next, without unlocking the door, the door is reopened to a certain distance that allows the door to be opened from the state in which the obstacle is caught, and then the door is closed again. In the technology described in Patent Document 3, a side mechanism such as a door edge rubber roller is provided along the opposing edges of a pair of left and right platform doors that opens toward at least one of the track side and the platform side when the pair of platform doors closes. In the technology described in Patent Document 4, one of a pair of left and right movable doors has a stopper mechanism that abuts against the door pocket that houses that door. The pressing torque on one movable door is greater than the pressing torque on the other movable door.

[0003] In the technology described in Patent Document 5, the door edge of one movable door is positioned on the vehicle side with respect to a reference line, and the door edge of the other movable door is positioned on the opposite side from the vehicle. An imaginary plane including the side surface of the door edge of one movable door on the reference line side and an imaginary plane including the side surface of the door edge of the other movable door on the reference line side are spaced apart from each other. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-137087 [Patent Document 2] Japanese Patent Application Laid-Open No. 2003-137086 [Patent Document 3] Japanese Patent Application Laid-Open No. 2010-007456 [Patent Document 4] Japanese Patent Application Laid-Open No. 2012-096768 [Patent Document 5] Japanese Patent Application Laid-Open No. 2015-080952 Summary of the Invention [Problem to be solved by the invention]

[0005] In recent years, platform door systems (also known as movable platform fences) with double-doors that can be opened or closed have been installed at positions corresponding to the entrances and exits of trains on station platforms to prevent passengers from falling off the platform or coming into contact with trains. These platform door systems must take measures to prevent passengers or objects from getting caught in the doors when they close, a situation known as door entrapment. Possible solutions include a system that uses a sensor installed at the edge of the door to detect abnormalities in door position when door entrapment occurs, a system that detects the load on the motor that operates the door and reverses or stops the motor, and a system that makes the door edge movable.

[0006] However, methods that detect abnormalities in door position and methods that detect the load on the motor may not be able to detect an abnormality if a thin or thin object, such as a finger, the tip of an umbrella, or the string of a bag, becomes trapped. Setting strict criteria for abnormality detection can lead to malfunction. Furthermore, placing a sensor at the edge of the door can cause durability issues, such as the sensor breaking down due to the impact of the door closing. Furthermore, methods that use a movable door edge structure result in a complex door structure, which reduces reliability and increases costs.

[0007] Therefore, it is conceivable to arrange a pair of movable doors in a staggered manner, with the door edges of the pair of movable doors spaced apart in the thickness direction of the movable doors, as described in Patent Document 5. This makes it possible to prevent even thin or thin objects from getting caught in the doors with a simple configuration.

[0008] However, if a pair of movable doors is staggered in this way and a gap is left between the door edges, the wind pressure caused by the train's wind when it approaches will escape through the gap to the platform side (i.e., the opposite side from the carriage), and passengers on the platform will be subjected to this wind pressure. Another problem is that this wind pressure will cause the movable doors to vibrate.

[0009] The present invention has been made in consideration of such problems, and aims to provide a platform door device that has a simple configuration that can prevent even thin or thin objects from getting caught in the doors, and that can reduce the wind pressure that passes through the gaps between the movable doors. [Means for solving the problem]

[0010] In order to solve the above-mentioned problems, [1] the platform door device according to the present invention is a platform door device installed on a platform of a railway station, and is provided with a pair of movable doors that can be opened and closed in a first direction, and when a reference line along the first direction is set, a door edge portion of one of the pair of movable doors is arranged on the vehicle side with respect to the reference line, and a door edge portion of the other of the pair of movable doors is arranged on the opposite side of the reference line from the vehicle, and a first imaginary plane including a side surface of the door edge portion of one of the movable doors on the reference line side and a second imaginary plane including a side surface of the door edge portion of the other movable door on the reference line side are spaced apart from each other in a second direction intersecting the first direction, and one of the movable doors is arranged to be parallel to the first imaginary plane. One movable door has one convex portion protruding from the plane or multiple convex portions lined up in a third direction intersecting both the first direction and the second direction and protruding from the first imaginary plane, and the other movable door has one convex portion protruding from the second imaginary plane or multiple convex portions lined up in the third direction and protruding from the second imaginary plane, the top of the one convex portion or multiple convex portions of one movable door is located closer to the second imaginary plane of the other movable door than the top of the one convex portion or multiple convex portions of the other movable door, and the one convex portion or multiple convex portions of one movable door are located in a position that does not interfere with the one convex portion or multiple convex portions of the other movable door when the pair of movable doors are opened or closed.

[0011] In the platform door device described in [1] above, the door edge portions of a pair of movable doors are arranged on the vehicle side and the opposite side of the vehicle with respect to the reference line. In other words, these door edge portions are arranged alternately in a direction intersecting the reference line. The side surfaces of these door edge portions are spaced apart in a direction intersecting the second direction, i.e., the opening and closing direction. With this configuration, even when the movable doors are completely closed, a gap is always created between the door edge portions, making it possible to prevent thin or thin objects from getting caught in the doors. Furthermore, compared to the various methods described above, this can be achieved with a simpler configuration.

[0012] Additionally, in the platform door device described in [1] above, each of the pair of movable doors has one protrusion protruding from the first and second imaginary planes, or multiple protrusions aligned in a third direction and protruding from the first and second imaginary planes. The top of the protrusion on one movable door is located closer to the second imaginary plane of the other movable door than the top of the protrusion on the other movable door. By providing such a protrusion in the gap between the pair of movable doors, the gap between the doors can be narrowed, reducing the wind pressure passing through the gap. Furthermore, by providing the protrusion on one movable door in a position that does not interfere with the protrusion on the other movable door during the opening and closing operation of the pair of movable doors, the protrusions can be prevented from interfering with the opening and closing operation of the pair of movable doors.

[0013] [2] The platform door device of [1] above further includes a first detection means for detecting the presence of a foreign object on a line set along a first direction, and the line may be located between a convex portion of one movable door and a convex portion of the other movable door adjacent to the convex portion in a third direction, as viewed from the first direction. This makes it possible to effectively detect whether an object has been caught in the movable doors when they are closed. Furthermore, the first detection means may be, for example, a sensor that detects foreign objects using laser light.

[0014] [3] In the pair of movable doors of the platform door device described in [1] or [2] above, the tops of one or more of the protrusions may be made of synthetic resin. This allows the tops of the protrusions to act as a buffer when the movable doors vibrate due to wind pressure from the train and the protrusion of one movable door comes into contact with the other movable door, reducing the generation of abnormal noise. In addition, foreign objects caught between the top of the protrusion of one movable door and the other movable door can be easily removed.

[0015] [4] When the pair of movable doors of the platform door device described in [1] to [3] above are fully closed, one or more convex portions of one movable door and one or more convex portions of the other movable door may overlap each other when viewed from a third direction. In this case, the gap between the movable doors can be narrowed further, and wind pressure passing through the gap between the movable doors can be further reduced.

[0016] [5] The platform door device of [1] to [3] above further includes a pair of door pockets that respectively house the pair of movable doors. When the pair of movable doors is fully closed, one or more protrusions of one of the movable doors may be positioned closer to the door pocket that houses the other movable door than the one or more protrusions of the other movable door. In this case, stroke adjustment of the movable doors is not required. Therefore, there is no need to adjust the stroke in advance or to change parts for stroke adjustment, which improves production efficiency.

[0017] [6] In at least one of the pair of movable doors of the platform door device according to [1] to [5] above, the one or more protrusions may have a shape in which the width in the first direction gradually decreases from the base end toward the apex. This increases the mechanical strength of the base end of the protrusion, which is on the opposite side of the apex.

[0018] [7] In at least one of the pair of movable doors of the platform door device according to [1] to [5] above, the one or more protrusions may have a shape in which the width in the first direction is constant from the base end to the top end. This simplifies the shape of the protrusion and makes manufacturing easier. [Effects of the Invention]

[0019] The platform door device of the present invention has a simple configuration that makes it possible to prevent even thin or thin objects from getting caught in the doors, and also reduces the wind pressure that passes through the gaps between the movable doors. [Brief explanation of the drawings]

[0020] [Figure 1] FIG. 1 is a cross-sectional plan view showing the configuration of a platform door system 1 equipped with a plurality of platform door devices according to one embodiment of the present invention. [Figure 2] FIG. 2 is a front view showing the configuration of the platform door system shown in FIG. [Figure 3] FIG. 3 is a perspective view showing the configuration of the platform door system as seen from the platform side. [Figure 4] FIG. 4 is a perspective view showing the configuration of the platform door system as seen from the track side. [Figure 5] FIG. 5 is a top view showing the configuration of the platform door device. [Figure 6] Fig. 6(a) is a schematic diagram showing the case where the overlap length D1 is large, and Fig. 6(b) is a schematic diagram showing the case where the overlap length is reduced by changing the installation position of the platform door pocket. [Figure 7] FIG. 7 is a diagram showing a specific example of a convex portion. [Figure 8] FIG. 8 is a diagram showing a specific example of a convex portion. [Figure 9] FIG. 9 is a diagram showing a specific example of a convex portion. [Figure 10] FIG. 10 is a perspective view of a movable door including a protrusion, showing a modified example. [Figure 11] FIG. 11 is a diagram showing a modified example, and is a top view of a protrusion. DETAILED DESCRIPTION OF THE INVENTION

[0021] Hereinafter, an embodiment of a platform door device according to the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same elements are given the same reference numerals, and duplicated explanations will be omitted.

[0022] FIG. 1 is a cross-sectional plan view showing the configuration of a platform door system 1 equipped with a plurality of platform door devices 3A according to one embodiment of the present invention. FIG. 2 is a front view showing the configuration of the platform door system 1 shown in FIG. 1. FIGS. 1 and 2 show a state in which a vehicle C is parked at a platform P. FIG. 3 is a perspective view showing the configuration of the platform door system 1 as seen from the platform P side. FIG. 4 is a perspective view showing the configuration of the platform door system 1 as seen from the track side. Note that in FIGS. 1 to 4, protruding parts, which will be described later, are not shown.

[0023] As shown in Figures 1 to 4, the platform door system 1 includes multiple platform door devices 3A. The multiple platform door devices 3A are installed near the edge of platform P at a railway station, at positions corresponding to passenger entrances E1 for vehicles C. Each platform door device 3A is a double-hinged sliding door and includes a pair of movable doors 4 and 5 and platform door pockets 31 and 32 that can store the movable doors 4 and 5, respectively. The movable doors 4 and 5 are reciprocated by a drive mechanism (not shown) between a position where they are stored in the platform door pockets 31 and 32, respectively, and a position where they are pulled out from the platform door pockets 31 and 32, respectively. The pair of movable doors 4 and 5 move in opposite directions to close the passenger boarding and alighting passageway when pulled out, and move in opposite directions to open the passenger boarding and alighting passageway when they are stored in the platform door pockets 31 and 32, respectively. The platform door pockets 31 and 32 are equipped with a drive mechanism for driving the movable doors 4 and 5, a door open / close detector for detecting the closed state of the movable doors 4 and 5, and an obstacle sensor 38 (see Figure 4) for detecting obstacles on the vehicle C side.

[0024] The platform door system 1 also includes a crew door 7 and a crew door pocket 9. The crew door 7 is located in a position different from the passenger entrance E1 and the platform door device 3A. The crew door 7 and the crew door pocket 9 are crew doors and crew door pockets for opening and closing the boarding and alighting passageway used by crew members getting on and off the crew cabin of vehicle C, and are provided for the crew cabin and the crew entrance E2. The platform door system 1 also includes an emergency escape door 10 and an emergency escape door pocket 12. The emergency escape door 10 is provided to allow passengers to escape from vehicle C when vehicle C stops (for example, due to a disaster, power outage, accident, etc.) while the position of the platform door device 3A does not match the boarding and alighting entrance E1 of vehicle C.

[0025] FIG. 5 is a top view showing the configuration of the platform door apparatus 3A. As shown in FIG. 5, the movable doors 4 and 5 of the platform door apparatus 3A can be opened and closed by reciprocating along direction A1 (first direction) along the edge of the platform P. When the movable doors 4 and 5 are closed, the door edge portion 41 of one of the movable doors 4 is located on the vehicle C (see FIG. 1) side of a reference line SL along direction A1, and the door edge portion 51 of the other movable door 5 is located on the opposite side (opposite side) of the reference line SL from the vehicle C. In other words, these door edge portions 41, 51 are arranged alternately in a direction intersecting the reference line SL (e.g., direction A2). Note that in this embodiment, when the movable doors 4 and 5 are closed, the entire movable door 4, including the door edge portion 41, is located on the vehicle C side of the reference line SL, and the entire movable door 5, including the door edge portion 51, is located on the opposite side (opposite side) of the reference line SL from the vehicle C.

[0026] Here, we define a first imaginary plane P1 including the side surface 41a of the door tip portion 41 on the reference line SL side, and a second imaginary plane P2 including the side surface 51a of the door tip portion 51 on the reference line SL side. When the movable doors 4 and 5 are closed, the imaginary planes P1 and P2 are spaced apart in a direction intersecting with the direction A1 (for example, direction A2). Therefore, as shown in FIG. 5, the area between the door tip portion 41 and the door tip portion 51 as viewed from the direction A1 forms a gap B. In this embodiment, the entire side surface of the movable door 4 on the reference line SL side, including the side surface 41a, is included in the imaginary plane P1, and the entire side surface of the movable door 5 on the reference line SL side, including the side surface 51a, is included in the imaginary plane P2.

[0027] Furthermore, when the movable doors 4 and 5 are fully closed, the tip 41b of the door tip portion 41 is located closer to the platform door door pocket 32 ​​in direction A1 than the tip 51b of the door tip portion 51. In other words, when viewed from the normal direction of the imaginary planes P1 and P2 (i.e., direction A2), the movable doors 4 and 5 partially overlap each other. The movable doors 4 and 5 have opposing surfaces 42 and 52, respectively, that face each other when the movable doors 4 and 5 are closed. The opposing surfaces 42 and 52 may be flat or may have irregularities.

[0028] Figure 5 shows the overlap length D1 of the movable doors 4 and 5. It is desirable for the overlap length D1 to be relatively large to facilitate the installation of the platform door device 3A and the attachment of the protrusions 43 and 53 described below. Depending on the platform shape and the number of doors on the stopped trains, it may be necessary to change the lengths of the platform door door pockets 31 and 32 and the movable doors 4 and 5 in the direction A1. However, if the overlap length D1 is large, this can be addressed by simply changing the installation position of the platform door door pockets 31 and 32 while using the same platform door device 3A. Figure 6(a) is a schematic diagram showing a case where the overlap length D1 is large. Figure 6(b) is a schematic diagram showing a case where the overlap length D1 is reduced by changing the installation position of the platform door pockets 31 and 32, thereby significantly changing the length of the movable doors 4 and 5 in the direction A1. Alternatively, this can be addressed by moving the platform door pockets 31 and 32 themselves, rather than by changing the installation position of the platform door door pockets 31 and 32. In either case, the same platform door device 3A can be used, which can lead to cost reduction. However, the overlap length D1 may be any value.

[0029] The movable door 4 has a protrusion 43 that protrudes from the imaginary plane P1 toward the imaginary plane P2. The movable door 5 has a protrusion 53 that protrudes from the imaginary plane P2 toward the imaginary plane P1. FIGS. 7 to 9 are diagrams showing specific examples of the protrusions 43 and 53. FIG. 7 is a perspective view of the movable doors 4 and 5 including the protrusions 43 and 53. FIG. 8 is a side view of the movable doors 4 and 5 including the protrusions 43 and 53 when viewed from the direction A1. FIG. 9 is a top view of the protrusions 43 and 53. As shown in FIGS. 7 and 8, the movable door 4 has a plurality of protrusions 43, and the movable door 5 has a plurality of protrusions 53. The plurality of protrusions 43 are arranged in a comb-teeth shape along a direction A3 (a third direction) that intersects with both the direction A1 and the direction A2. Similarly, the plurality of protrusions 53 are arranged in a comb-teeth shape along the direction A3. Note that the direction A3 is a direction that intersects with (is perpendicular to, in one example) the surface of the platform P.

[0030] When the movable doors 4 and 5 are fully closed, the convex portion 43 of the movable door 4 is located on the platform door pocket 32 ​​side relative to the convex portion 53 of the movable door 5. In other words, in the same state, the convex portion 53 of the movable door 5 is located on the platform door pocket 31 side relative to the convex portion 43 of the movable door 4. The convex portion 43 is located at the door tip portion 41 of the movable door 4, and the convex portion 53 is located at the door tip portion 51 of the movable door 5. In one example, the convex portion 43 is located at one end of the opposing surface 42 closer to the platform door pocket 32, and the convex portion 53 is located at one end of the opposing surface 52 closer to the platform door pocket 31.

[0031] The protrusion 43 has an apex 44 and a base end 45 (see FIG. 9). The apex 44 of the protrusion 43 is located closer to the imaginary plane P2 than the apex 54 of the protrusion 53. The protrusion 53 has an apex 54 and a base end 55. The apex 54 of the protrusion 53 is located closer to the imaginary plane P1 than the apex 44 of the protrusion 43. That is, when the protrusions 43 and 53 move to the same position in the direction A1 during the opening and closing operation of the movable doors 4 and 5, parts of the protrusions 43 and 53 overlap each other when viewed from the direction A3. At this time, the multiple protrusions 43 and the multiple protrusions 53 are positioned so as not to interfere with each other so as not to interfere with the opening and closing operation of the movable doors 4 and 5 (see FIG. 8). In one example, the protrusions 43 and the protrusions 53 are alternately arranged in the direction A3.

[0032] In the illustrated example, the convex portion 43 of the movable door 4, which is the movable door on the vehicle C side, has a shape in which the width in the direction A1 is constant from the base end 45 to the top 44. On the other hand, the convex portion 53 of the movable door 5, which is the movable door on the opposite side from the vehicle C, has a shape in which the width in the direction A1 gradually decreases from the base end 55 to the top 54. However, the shapes of the convex portions 43, 53 are not limited to this example. The convex portion 43 may have a shape in which the width in the direction A1 gradually decreases from the base end 45 to the top 44. Furthermore, the convex portion 53 may have a shape in which the width in the direction A1 is constant from the base end 55 to the top 54.

[0033] At least the tops 44 and 54 of the protrusions 43 and 53 are made of synthetic resin. The entire protrusions 43 and 53 may be made of synthetic resin. Examples of synthetic resins include rubber plastics.

[0034] Referring again to FIG. 5, the platform door device 3A further includes a detection means 30 (first detection means). The detection means 30 detects foreign objects, such as an umbrella or bag caught in a door, or passengers, that exist on a straight line set along direction A1 within the area (including gap B) between imaginary planes P1 and P2. The detection means 30 is a one-dimensional sensor. In this embodiment, the detection means 30 has a light-emitting unit 33 and a light-receiving unit 34 that are arranged opposite each other. The light-emitting unit 33 is fixed to the platform door door pocket 31, and the light-receiving unit 34 is fixed to the platform door door pocket 32. Alternatively, the light-receiving unit 34 may be fixed to the platform door door pocket 31, and the light-emitting unit 33 may be fixed to the platform door door pocket 32. The light-emitting unit 33 emits laser light L1 (see FIGS. 7 and 8) on the straight line. The light-receiving unit 34 detects the laser light L1 emitted from the light-emitting unit 33. The straight line, i.e., the optical path of laser light L1, is included in the area between imaginary planes P1 and P2. If a foreign object is present in this area, laser light L1 is blocked, and light receiving unit 34 is unable to detect laser light L1. This detects the presence of a foreign object in this area. The detection means 30 may start its detection operation, for example, when the door open / close detectors in platform door pockets 31 and 32 detect the closed state of movable doors 4 and 5.

[0035] The above-mentioned straight lines, i.e., the optical paths of the laser light L1, are set in multiple lines (two in the illustrated example) in the direction A3. For this reason, the platform door device 3A is equipped with multiple detection means 30 (two in this embodiment). The multiple light-emitting units 33 are arranged in a row along the direction A3 in the platform door door pocket 31 (or 32), and the multiple light-receiving units 34 are arranged in a row along the direction A3 in the platform door door pocket 32 ​​(or 31).

[0036] 8, the straight line, i.e., the optical path of the laser light L1, is located between a certain convex portion 43 and a convex portion 53 adjacent to the certain convex portion 43 in the direction A3 when viewed from the direction A1. At the location where the optical path of the laser light L1 exists, the distance between the convex portions 43 and 53 is wider than in other locations.

[0037] The platform door device 3A further includes a detection means 60 (second detection means). The detection means 60 detects an object present in an area on the opposite side of the vehicle C (i.e., the area inside the platform P) with respect to a third imaginary plane P3 that includes the side 5b of both side surfaces 5a, 5b of the movable door 5 that is opposite the reference line SL. The detection means 60 may be configured with either a one-dimensional sensor or a two-dimensional sensor. However, the detection area C4 of the detection means 60 is included in the area on the opposite side of the imaginary plane P3 from the vehicle C. Preferably, the detection area C4 is along the imaginary plane P3 and is close to the imaginary plane P3 with a small gap therebetween.

[0038] Here, an imaginary plane P4 is defined that includes the side surfaces 31a, 32a of the platform door door pockets 31, 32 on the side opposite to the vehicle C. It is desirable that no protrusions that may obstruct passenger passage are provided in the area on the opposite side of the imaginary plane P4 from the vehicle C (on the platform P side). Therefore, it is preferable that the detection means 60 is disposed in the area on the vehicle C side of the imaginary plane P4.

[0039] The platform door device 3A further includes a guidance means 35. The guidance means 35 is configured to include at least one of a light-emitting body, a display screen, and a speaker, for example. When the detection means 30 detects a foreign object, the guidance means 35 notifies passengers and the like that a foreign object has been detected by outputting at least one of light, sound (including audio guidance), and an image (display of text or pictures).

[0040] The advantages of the platform door system 3A of this embodiment, which has the above-described configuration, are now described. In this platform door system 3A, the door leading portions 41, 51 of a pair of movable doors 4, 5 are positioned on the vehicle C side and the opposite side of vehicle C, respectively, relative to the reference line SL. The side surfaces 41a, 51a of these door leading portions 41, 51 are spaced apart in a direction A2 (a second direction) intersecting with the direction A1 (i.e., the opening and closing direction). This configuration ensures that a gap B is always created between the door leading portions 41, 51 even when the movable doors 4, 5 are fully closed, preventing thin or thin objects from becoming trapped. Furthermore, compared to the various methods described in the "Problems to be Solved by the Invention" section, a platform door system capable of preventing trapping can be realized with a simpler configuration. Furthermore, the simplified configuration of the platform door system facilitates installation of the platform door system on the platform and shortens the installation time.

[0041] It should be noted that even when a pair of movable doors are arranged in a straight line, as in typical platform door systems (see, for example, Patent Documents 1 to 4), it is possible to leave a gap between the door edges. However, with platform door system 3A of this embodiment, the distance between tip 41b of door edge 41 and tip 51b of door edge 51 as seen from the passenger side, i.e., from direction A2, can be narrowed, making it possible to ensure sufficient width for gap B to prevent passengers from getting caught in the doors while fully ensuring passenger safety.

[0042] Furthermore, with the platform door apparatus 3A of this embodiment, the door edge portions 41, 51 do not abut against each other, eliminating the need for precise adjustment of the relative height or inclination of the movable doors 4 and 5, or the detection reference value of the door opening / closing detector. This facilitates door alignment (door alignment adjustment). Conventionally, to avoid the collision noise of the door edges during closing, adjustments are made to leave a gap of, for example, several millimeters between the doors. This adjustment is necessary due to individual differences in components such as the motor that drives the doors, the belt that transmits the motor's driving force to the doors, the sensors that make up the door opening / closing detector, and dimensional errors in the door body, as well as differences in installation conditions, installation environment, and ambient temperature. The platform door apparatus 3A of this embodiment eliminates the need for such adjustments.

[0043] Furthermore, according to the platform door device 3A of this embodiment, when a train passes, wind passes between the recesses between the multiple protrusions 43 of the movable door 4 and the movable door 5, and between the recesses between the multiple protrusions 53 of the movable door 5 and the movable door 4, thereby reducing the load on the platform door device and its base due to wind pressure from the train and increasing the durability of the platform door device.

[0044] Additionally, in this platform door device 3A, the movable doors 4 and 5 each have a protrusion 43, 53 that protrudes from the imaginary planes P1, P2, respectively. The top 44 of the protrusion 43 of one movable door 4 is located closer to the imaginary plane P2 than the top 54 of the protrusion 53 of the other movable door 5. By providing such protrusions 43, 53 in the gap between the movable doors 4 and 5, the gap between the movable doors 4 and 5 can be narrowed, reducing wind pressure passing through the gap between the movable doors 4 and 5. Furthermore, the protrusions 43, 53 of the movable doors 4 and 5 are positioned so as not to interfere with each other during the opening and closing operations of the movable doors 4 and 5, preventing the protrusions 43, 53 from interfering with the opening and closing operations of the movable doors 4 and 5. Furthermore, the protrusions 43, 53 make the gap between the movable doors 4 and 5 less visible to passengers on the platform P, thereby ensuring sufficient passenger safety while ensuring a sufficient gap width to prevent passengers from getting caught in the doors.

[0045] In this embodiment, the movable door 4 has a plurality of protrusions 43, and the movable door 5 has a plurality of protrusions 53, but at least one of the protrusions 43 and the protrusions 53 may be provided only once. Even in such a case, the above-described effects can be achieved.

[0046] As in this embodiment, the platform door device 3A further includes detection means 30 for detecting the presence of a foreign object on a straight line set along direction A1. This straight line may be located between the convex portion 43 of one of the movable doors 4 and the convex portion 53 of the movable door 5 adjacent to the convex portion 43 in direction A3, as viewed from direction A1. This allows for appropriate detection of entrapment when the movable doors 4, 5 are closing. Entrapment can then be effectively avoided by interrupting the closing operation of the movable doors 4, 5 or issuing a warning about entrapment. Furthermore, the detection means 30 can be, for example, a sensor that detects foreign objects using laser light L1.

[0047] For example, if the object caught in the door is a passenger's belongings (such as an umbrella or bag) on ​​the platform P side, it is possible to forcibly remove the object or wait until the next train arrives and the movable doors 4 and 5 reopen. However, if the belongings of a passenger who has already boarded car C are caught between the movable doors 4 and 5, they will inevitably be caught in the door of car C as well, making it difficult to remove. The devices described in Patent Documents 1 and 2 can open the door even in such cases if the belongings are wide enough for the door edge sensor to detect them. However, if the belongings are too thin for the door edge sensor to detect, there is a risk that car C will start moving. In contrast, according to this embodiment, the provision of the detection means 30 effectively prevents the occurrence of door entrapment regardless of the width (thickness) of the belongings. In particular, the optical path range of the laser light L1 can be easily adjusted, making it easy to detect relatively thin foreign objects (such as fingers, the tip of an umbrella, or the string of a bag).

[0048] As in this embodiment, the tops 44, 54 of the convex portions 43, 53 of the movable doors 4 and 5 may be made of synthetic resin. This allows the tops 44, 54 to act as a buffer when the movable doors 4, 5 vibrate due to wind pressure from the car C and the convex portion 43 of the movable door 4 comes into contact with the movable door 5, or when the convex portion 53 of the movable door 5 comes into contact with the movable door 4, thereby reducing the generation of abnormal noise. In addition, foreign objects caught between the top 44 of the convex portion 43 of the movable door 4 and the movable door 5 can be easily pulled out. Furthermore, even if the tops 44, 54 are damaged, they can be easily replaced if they are made of synthetic resin, minimizing the disruption of train operations.

[0049] As in this embodiment, when the movable doors 4 and 5 are fully closed, the convex portion 43 of the movable door 4 may be located on the platform door pocket 32 ​​side that houses the movable door 5, relative to the convex portion 53 of the movable door 5. In this case, it is not necessary to adjust the stroke of the movable doors 4 and 5. Therefore, it is not necessary to adjust the stroke in advance or to change parts for stroke adjustment, and production efficiency can be improved.

[0050] As in this embodiment, at least one of the protrusions 43 and 53 may have a shape in which the width in the direction A1 gradually decreases from the base end 45 (55) to the apex 44 (54). This can increase the mechanical strength of the base end 45 (55) on the opposite side to the apex 44 (54) of at least one of the protrusions 43 and 53.

[0051] As in this embodiment, at least one of the protrusions 43 and 53 may have a shape in which the width in the direction A1 is constant from the base end 45 (55) to the apex 44 (54). This simplifies the shape of at least one of the protrusions 43 and 53, making it easier to manufacture.

[0052] As in this embodiment, the platform door device 3A may be equipped with detection means 60. This makes it possible to prevent passengers from leaning not only on the movable door 4 but also on the movable door 5 (i.e., the movable door on the platform P side of the reference line SL) and from getting caught in the platform door door pocket 32 ​​on the movable door 5 side.

[0053] Furthermore, as in this embodiment, the platform door device 3A may be provided with guidance means 35 that notifies passengers using at least one of light and sound when the detection means 30 detects a foreign object. This alerts passengers and more effectively prevents accidents.

[0054] (Variation) 10 and 11 are views showing a modified example of the above embodiment. FIG. 10 is a perspective view of the movable doors 4 and 5, each including a protrusion 43 and a protrusion 53. FIG. 11 is a top view of the protrusions 43 and 53. In this modified example, the movable door 4 includes a member 46 formed by integrating multiple protrusions 43. The member 46 is disposed at the tip of the movable door 4. The movable door 5 includes a member 56 formed by integrating multiple protrusions 53. The member 56 is disposed at the tip of the movable door 5. As a result, the member 46 forms the tip 41b of the movable door 4, and the member 56 forms the tip 51b of the movable door 5. In this modified example, the protrusion 43 protrudes from the imaginary plane P1 toward the imaginary plane P2, and the protrusion 53 protrudes from the imaginary plane P2 toward the imaginary plane P1. Furthermore, when the movable doors 4 and 5 are fully closed, the protrusion 43 of one movable door 4 and the protrusion 53 of the other movable door 5 overlap each other when viewed from the direction A3. In this case, the gap between the movable doors 4, 5 can be narrowed, further reducing the wind pressure passing through the gap between the movable doors 4, 5. As in this modified example, the protrusions 43 and 53 may each be located at the tip of the movable doors 4 and 5 in the direction A1. In the above embodiment, the minimum value of the overlap length D1 shown in Figure 5 is when the protrusions 43, 53 overlap each other at the tip of each door end portion 41, 51, as in this modified example.

[0055] The platform door system according to the present invention is not limited to the above-described embodiment, and various other modifications are possible. For example, the shape of the protrusions of the pair of movable doors is not limited to the shapes shown in the above-described embodiment and modified examples.

[0056] Furthermore, in the above embodiment and modified example, the right-side movable door 4 as seen from the passenger side is arranged on the car C side of the reference line SL, and the left-side movable door 5 as seen from the passenger side is arranged on the opposite side of the reference line SL from car C, but the left-side movable door may also be arranged on the car C side of the reference line SL, and the right-side movable door may be arranged on the opposite side of the reference line SL from car C. Furthermore, the platform door device of the present invention may further include a control device that is higher-level than the first and second detection means and the guiding means. When the first and second detection means detect an object, they send a detection signal to the control device, and the control device controls the detection signal and instructs the guiding means, thereby making it possible to suitably control the operation of the first and second detection means and the guiding means. [Explanation of symbols]

[0057] 1...platform door system, 3A...platform door device, 4, 5...movable door, 5a, 5b...side, 7...crew door, 9...door pocket for crew door, 10...emergency escape door, 12...door pocket for emergency escape door, 30...detection means (first detection means), 31, 32...door pocket for platform door, 31a, 32a...side, 33...light-emitting unit, 34...light-receiving unit, 35...guiding means, 38...obstacle sensor, 41, 51...door tip portion, 41a, 51a...side, 41 b,51b...tip portion, 42,52...opposing surface, 43,53...convex portion, 44,54...top portion, 45,55...base end portion, 46,56...component, 60...detection means (second detection means), A1...direction (first direction), A2...direction (second direction), A3...direction (third direction), B...gap, C...vehicle, C4...detection area, E1,E2...boarding / alighting door, L1...laser light, P...platform, P1,P2,P3,P4...imaginary plane, SL...reference line.

Claims

1. A platform door device installed on a platform at a railway station, a pair of movable doors that can be opened and closed in a first direction; When a reference line along the first direction is set, a door edge portion of one of the pair of movable doors is disposed on the vehicle side with respect to the reference line, and a door edge portion of the other of the pair of movable doors is disposed on the opposite side of the reference line from the vehicle, a first imaginary plane including a side surface of the door tip portion of the one movable door on the reference line side and a second imaginary plane including a side surface of the door tip portion of the other movable door on the reference line side are spaced apart from each other in a second direction intersecting with the first direction, the one movable door has one protrusion protruding from the first imaginary plane or a plurality of protrusions arranged in a third direction intersecting both the first direction and the second direction and protruding from the first imaginary plane, the other movable door has one protrusion protruding from the second imaginary plane or a plurality of protrusions arranged in the third direction protruding from the second imaginary plane, a top of the one protrusion or the plurality of protrusions of the one movable door is located closer to the second imaginary plane of the other movable door than a top of the one protrusion or the plurality of protrusions of the other movable door, A platform door device in which the one convex portion or the multiple convex portions of one of the movable doors is positioned so as not to interfere with the one convex portion or the multiple convex portions of the other movable door during the opening and closing operation of the pair of movable doors.

2. a first detection means for detecting the presence of a foreign object on a line set along the first direction; 2. The platform door device according to claim 1, wherein the straight line is located between the convex portion of one of the movable doors and the convex portion of the other movable door adjacent to the convex portion in the third direction when viewed from the first direction.

3. The platform door device according to claim 1 or 2, wherein in the pair of movable doors, the top of the one convex portion or the plurality of convex portions is made of synthetic resin.

4. 3. The platform door device according to claim 1, wherein when the pair of movable doors are completely closed, the one or more convex portions of one movable door and the one or more convex portions of the other movable door overlap each other when viewed from the third direction.

5. Further provided is a pair of door pockets for respectively storing the pair of movable doors, 3. The platform door device according to claim 1, wherein when the pair of movable doors are completely closed, the one or more convex portions of one of the movable doors is located on the door pocket side that stores the other movable door relative to the one or more convex portions of the other movable door.

6. 3. The platform door device according to claim 1, wherein in at least one of the pair of movable doors, the one convex portion or the plurality of convex portions has a shape in which the width in the first direction gradually decreases from the base end toward the top.

7. 3. The platform door device according to claim 1, wherein in at least one of the pair of movable doors, the one convex portion or the plurality of convex portions has a shape in which the width in the first direction is constant from the base end to the top.

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