JP2006224842A - Safety device for platform door device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To certainly detect whether or not a passenger is left between a door and a train by a simple constitution. <P>SOLUTION: The safety device for the platform door device for detecting the passenger existing at an area between the train 6 and the door 16 of the platform door device 4 has arms 26, 28 arranged at both sides of the door 16 at the area respectively. The arms 26, 28 are provided rotatably by a wind pressure of the train and automatically returnably by a return spring around approximately vertical shafts 30, 32 relative to a floor surface of the platform 2 at a door 6 side of the platform 2. Projectors 34e, 36e of transmission type photoelectric sensor for detecting the passenger and light-receivers 34r, 36r are provided between the arms 26, 28 so as to penetrate an optical axis. Further, when force is applied to the arms 26, 28 and the arms 26, 28 are rotated around the rotation shafts 30, 32, limit switches provided on the rotation shafts 30, 32 detect that it is not in the detection state. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a safety device for preventing a door from closing when a passerby is left between the door and a train in a platform door device installed on a platform of a station, and in particular, used in this safety device. It relates to a sensor that performs.

  Conventionally, as the safety device, for example, there is one disclosed in Patent Document 1. In the safety device disclosed in Patent Document 1, in order to detect passengers existing between the train and the door of the platform door device, the first detection region is formed on the side of the opening of the platform door device. A first photoelectric sensor is provided. The second photoelectric sensor is provided so as to form the second detection region at a position closer to the train side than the detection region of the first photoelectric sensor. As the second photoelectric sensor, for example, a reflective photoelectric sensor is provided in the header box of the platform door device. This reflective photoelectric sensor is composed of a projector that projects light toward the floor surface of the platform, and a light receiver that receives reflected light from the floor surface of the platform.

  In the technique of Patent Document 1, since the second photoelectric sensor is attached to the header box, it is possible to prevent a building limit (the train and the building on the platform from contacting each other when the train is stopped on the platform). For this reason, it is prohibited to install buildings or other structures within the distance predetermined by each railway operator from the long edge of the platform to the opposite side of the train. The position separated by a predetermined distance on the side is called the construction limit.) The second photoelectric sensor never exceeds. However, since the reflective photoelectric sensor is used as the second photoelectric sensor, if a puddle is formed on the floor of the platform due to rain water, etc., there is a possibility of malfunction, and the door and train Depending on the color and material of the clothes worn by the passengers remaining between the two, there is a possibility that they cannot be detected reliably.

  In order to solve the above problems, it is necessary to use a transmissive photoelectric sensor. However, when a transmissive photoelectric sensor is used, the projector and the light receiver must be installed so that the optical axis passes between both ends of the door opening of the platform door device. An example in which a transmission type photoelectric sensor is installed in this way is disclosed in Patent Document 2.

  In the technique of Patent Document 2, a rotating arm provided with a projector of a transmissive photoelectric sensor and a rotating arm provided with the light receiver are advanced to the train side, and are retracted from the train side. It is configured so that it can be driven by a motor so that one of the selected can be taken, and when the train stops on the platform, the rotating arm is advanced to the train side, and when the train is not on the platform, it is retracted from the train side. ing.

JP 2002-37056 A JP 2002-234428 A

  However, in the technique of Patent Document 2, the rotating arm must be driven by a motor, which increases the cost. Moreover, in order to prevent the rotating arm from being damaged by the wind pressure when the train enters the platform, and the rotating arm from coming into contact with the train, the rotating arm must be You must advance to the train side. Therefore, a detector for detecting that the train is stopped and a control circuit for controlling the motor in accordance with the detection signal are required, and the configuration becomes complicated.

  An object of the present invention is to provide a platform door device safety device that can reliably detect whether passengers remain between a door and a train with a simple configuration.

  The platform door device safety device according to the present invention is a platform door device safety device that detects passengers present in the region between the train and the platform door device door. In the platform door device, for example, a partition body is provided at a position inside a predetermined distance from the longitudinal edge of the platform. A door opening through which a passenger can pass is formed in the partition body. The door opens and closes the door opening. Two supports are arranged on each side of the door in the region. These supports are provided on the platform so as to be rotatable about an axis substantially perpendicular to the floor surface of the platform on the door side of the platform. In the detectable state where the tip ends of these supports are on the train side, a transmissive photoelectric sensor is provided on the support so that the optical axis passes between the supports. The transmissive photoelectric sensor detects an object when the optical axis is blocked. For example, a light projector can be provided on one support and a light receiver can be provided on the other support. Alternatively, a projector and a light receiver may be provided on one support so as to face the other support, and a reflector that reflects light rays from the projector to the light receiver may be provided on the other support. Each of the supports is provided with a self-return means. The self-returning means holds the support in the detection state, and rotates the support around the axis when a force that rotates the support around the axis is applied to the support. When the force disappears, the support is automatically returned to the detection state. As the self-returning means, for example, an elastic body that is provided between the support and the fixing portion, expands when the force is applied, and returns to the original when the force disappears can be used.

  In the safety device for a platform door apparatus configured as described above, when the train enters the platform when the support is in the detection state, the support is automatically rotated around the axis by the wind pressure. Therefore, the support is not damaged by the influence of wind pressure. And when a train stops at a platform and a wind pressure lose | disappears, since a support body will return to a detection state, it can detect whether the passenger is left between a platform door and a train. Moreover, since the photoelectric sensor is a transmission type, even if a water pool or the like is formed on the floor surface of the platform, it is possible to reliably detect the presence or absence of passengers without being affected by it. In addition, even when the passenger gets in and out of the train, even if it comes into contact with the support, the support rotates as described above, so that the support is not damaged and the passenger is not injured. . Further, since the support is automatically rotated by the self-returning means, the motor is controlled based on the motor for rotating the support, the detector for detecting the position of the train, and the signal from the detector. For this reason, a control circuit is not required, and the configuration can be simplified. Further, the self-returning means rotates the support in the direction of the force regardless of which direction the support is applied around the axis, and returns to the original state when the force disappears. It is desirable to configure. If comprised in this way, a support body can be rotated even if a train advances from any direction to a platform.

  The support may be provided so that the tip of the support is located in the vicinity of the platform building limit in the detection state. If comprised in this way, it will become possible to detect whether a passenger exists near the position near a building limit, and can improve safety.

  The support may be an arm installed near the floor of the platform. If comprised in this way, even if a passenger is a short person like a child, it can detect reliably, and since the support body itself can also be made low, it can be constituted small. it can.

  Alternatively, the support can be formed in a fence shape. This configuration can make the passenger think that it is impossible to move beyond the support from between the door and the train in the detected state, accidentally along the direction of the platform It is possible to prevent a passenger from moving in a direction away from the door. Also, if the support is provided with a detector that detects that the passenger has rotated the support in the direction away from the door along the platform, the passenger will move in a direction away from the door beyond the support. Even this can be detected immediately.

  Another transmissive photoelectric sensor for passing the optical axis between the doors may be provided at a position closer to the door than the optical axis through which the transmissive photoelectric sensor passes. If comprised in this way, the presence or absence of a passenger can be detected at each of a position close to the door and a position away from the door, and safety can be improved.

  Another transmission type photoelectric sensor that passes the optical axis between the doors may be provided on a support column that passes through each axis. In this case, in the detection state, the support body is provided so as to protrude from the column to the train side. If comprised in this way, in order to install another transmission type photoelectric sensor, it is not necessary to provide another support body, and a safety device can be reduced in size.

  Further, the support can be formed in a fence shape. In this case, in the detection state, it is possible to make the passenger think that a passerby cannot move beyond the support from between the door and the train, and in the direction away from the door by mistake. It is possible to prevent passengers from moving along the platform. Also, if the support is provided with a detector that detects that the passenger has rotated the support in the direction away from the door along the platform, the passenger will move in a direction away from the door beyond the support. Even this can be detected immediately.

  As described above, according to the present invention, since the support is automatically rotated using self-hook means that does not require a motor, a detector, a control circuit, etc., the safety device can be manufactured with a simple configuration. In addition, the presence or absence of passengers between the door and the train can be detected more reliably.

  In the first embodiment of the present invention, a platform door device 4 is installed on the floor surface of the platform 2 as shown in FIGS. In the platform door device 4, as shown in FIG. 2C, the platform 2 is positioned at a position opposite to the train 6 by a predetermined distance from the longitudinal edge on the train 6 side of the floor surface of the platform 2 and on the longitudinal edge of the floor surface of the platform 2. A partition, for example, a fixed wall 8 is installed along the line. The fixed wall 8 is substantially perpendicular to the floor surface and has a height dimension that cannot be ridden by passengers. A header box 10 is attached to the upper portion of the fixed wall 8. In the fixed wall 8, when the train 6 stops on the platform 2, a passage opening 14 is formed at a position corresponding to the doors 12, 12 of the stopped train 6. The passage opening 14 is formed so as to pass through in a direction perpendicular to the longitudinal edge of the platform 6 so that a passenger can pass therethrough. The passage opening 14 can be opened and closed by doors 16 and 16. The doors 16 and 16 are advanced and retracted in the longitudinal edge direction of the platform 2 by a drive mechanism (not shown) provided in the header box 10 to open and close the passage opening 14. When the doors 12 and 12 of the stopped train 6 are opened, the doors 16 and 16 are also opened. When the doors 12 and 12 are closed, the doors 16 and 16 are also closed. Open / close control is performed.

  The fixed wall 8, the door 12 and the like are installed on the opposite side of the train 6 from the assumed building limit indicated by the dotted line in FIG. The building limit generally varies depending on the height position of the platform 2 from the floor surface. When the height is low, the building limit is close to the longitudinal edge of the floor surface of the platform 2.

  The safety device includes first and second photoelectric sensors. Of these, the first photoelectric sensor is attached to a support, for example, poles 18 and 20. The poles 18 and 20 are located on both sides of the traffic opening 14 and, as shown in FIG. 1 (c), at a position on the opposite side of the train 6 from the building limit and substantially perpendicular to the floor surface of the platform 6. It is fixed.

  At different height positions of the pole 18, for example, at the upper end of the pole 18 and at a position slightly lower than the center in the height direction of the pole 18, the projectors 22e and 24e of the first photoelectric sensor are directed toward the pole 20 side. Are mounted so as to project light almost horizontally. The projectors 22e and 24e project infrared light, for example. At the upper end of the pole 20 and a position somewhat lower than the center of the pole 18 in the height direction, the light receivers 22r and 24r of the first photoelectric sensor are arranged so as to face the light projectors 22e and 24e. The light receivers 22r and 24r can receive infrared rays. By arranging the light projectors 22e and 24e and the light receivers 22r and 24r corresponding to each other so as to face each other, light is emitted between both sides of the passage opening 14 as shown by broken lines in FIGS. 1 (a) and 1 (b). The shaft is passed through. The presence or absence of a passenger in the vicinity of the passage opening 14 is detected depending on whether or not the light beams from the light projections 22e and 22e are blocked.

  When the platform 2 is linear, the first photoelectric sensor can detect the passenger when the passenger is present between the door 16 of the platform door device 2 and the door 12 of the train 6. However, when the platform 2 is convexly curved toward the train 6 side, the distance between the door 16 of the platform door device 2 and the door 12 of the train 6 is larger than that of a straight line, and the projectors 22e, 24e, In the devices 22r and 24r, a dead zone region in which no passenger can be detected is further formed forward of the optical axis passed between the projectors 22e and 24e and the light receivers 22r and 24r. In order to improve this point, a second sensor is provided.

  The second sensor is attached to a support, such as arms 26 and 28. The arms 26 and 28 are provided on both sides of the passage opening 14, for example, on rotating columns 30 and 32 provided outside the poles 16 and 18. The rotary columns 30 and 32 are located further outside the poles 18 and 20 and are installed substantially perpendicular to the floor surface of the platform 2. The height is lower than the poles 18 and 20. These rotary struts 30 and 32 are formed so as to be rotatable around rotary shafts 30 a and 32 a that pass through the center thereof, that is, substantially perpendicular to the floor surface of the platform 2. The arms 26 and 28 are formed integrally with the rotary columns 30 and 32 so as to protrude perpendicularly to the rotary columns 30 and 32, that is, substantially perpendicular to the floor surface of the platform 2 and to the train 6 side. As shown in FIG. 1C, the ends of the arms 26 and 28 approach the building limit without exceeding the building limit. Accordingly, the arms 26 and 28 are also rotatable around the rotation shafts 30a and 32a. However, even if the arms 26 and 28 are rotated in a state parallel to the fixed wall 8 of the platform door device 4, for example, the installation positions are selected so that the tips of the arms 26 and 28 do not contact the poles 18 and 20. Yes. The arms 26 and 28 are installed at a height position close to the floor surface of the platform 2.

  As shown by the solid lines in FIGS. 1A to 1C, when the arms 26 and 28 protrude toward the train 6, the arms 26 are provided with projectors 34e and 36e of the second sensor on the arm 28 side. Are arranged at intervals in the length direction of the arm 26. Similarly, on the arm 28, the light receivers 34r and 36r of the second sensor are arranged at intervals in the length direction of the arm 28 so as to face the arm 26 side. As shown in FIGS. 1A and 1B, the optical axis is passed between the projector 34e and the light receiver 34r, and between the projector 36e and the light receiver 36r. 36e and light receivers 34r and 36r operate. Accordingly, when the arms 26 and 28 protrude toward the train 6 as shown by solid lines in FIGS. 1A to 1C, that is, in the detected state, there are passengers between the arms 26 and 28. , Can detect the feet of passengers. In particular, since the arms 26 and 28 are installed at a height close to the floor surface of the platform 2, even a short passenger such as a child can be detected at the feet of the passenger.

  As described above, since the rotary columns 30 and 32 are rotatable around the rotary shafts 30a and 32a, for example, when a large wind pressure is generated when the train 6 enters the platform 2, the wind pressure is reduced to the arm 26, 28, the arms 26 and 28 rotate around the rotation shafts 30a and 32a, so that the arms 26 and 28 are not damaged by receiving a large wind pressure. Since the arms 26 and 28 are rotatable in any direction around the rotary shafts 30a and 32a, the arm 26, 28 can be moved from the left side or the right side of FIG. 28 rotates. Further, even if many passengers get on and off the train 6 and the space between the door 16 of the platform door device and the door 12 of the train 6 is crowded with passengers, and the passenger contacts the arms 26 and 28, the arms 26 and 28 Rotates around the rotary shafts 30a, 32a, so that passengers are not injured and the arms 26, 28 are not damaged.

  However, if the arms 26 and 28 remain rotating, the presence or absence of passengers cannot be detected by the second sensor. Therefore, self-returning means, for example, a return spring is built in the rotary support columns 30 and 32 (not shown). For example, one end of the return spring is fixed to the inner surface of the rotary support column, and the other end is fixed to a fixed portion such as the floor surface of the platform 2. When the arms 26 and 28 are rotated by applying a force in any direction around the rotary shafts 30a and 32a from the detection state indicated by the solid lines in FIGS. extend. And if the said force lose | disappears, a return spring will return to an original state, and the rotation support | pillars 30 and 32 will also rotate to the original position at that time. Thereby, the arms 26 and 28 are also returned to their original positions, that is, the detection state. Therefore, when the train 6 enters the platform 2, the arms 26 and 28 are rotated from the detection state by the wind pressure. However, when the train 6 is stopped, the wind pressure disappears, so the arms 26 and 28. Returns to the detection state, and the presence or absence of a passenger can be detected by the second sensor.

  A second embodiment is shown in FIGS. This embodiment is configured in the same manner as in the first embodiment except that the projectors 34e and 36e of the second photoelectric sensor and the supports of the light receivers 34r and 36r are formed in a fence shape. The same parts are denoted by the same reference numerals, and the description thereof is omitted.

  The support bodies, for example, the fence-like bodies 281 and 301 are formed integrally with the rotary columns 301 and 321 provided at positions outside the poles 18 and 20. The rotary columns 301 and 321 are provided so as to be substantially perpendicular to the floor surface of the platform 2 and to be rotatable. The upper ends of the rotary columns 301 and 321 are at a higher position than the upper ends of the poles 18 and 20. Horizontal bars 262, 263, 264, 282, 283, 284 protrude from the upper end, center, and lower end of the rotating columns 301, 321 in a direction away from the rotating columns 301, 321 and almost perpendicular to the rotating columns 301, 321. . Longitudinal bars 265 and 285 are provided substantially parallel to the rotary columns 301 and 321 so as to connect these leading ends. In the detection state in which these horizontal rails 262, 263, 264, 282, 283, 284 are positioned substantially perpendicular to the train 6, the vertical rails 265, 285 are close to the train 6 side. The light emitters 34e and 36e and the light receivers 34r and 36r of the second photoelectric sensor are provided on the lowermost horizontal rails 264 and 284 in the same manner as in the first embodiment. Of course, a return spring as an automatic return means is also provided in the rotary columns 301 and 321.

  With this configuration, in addition to operating in the same manner as in the first embodiment, in the detection state, it extends beyond the fence-like bodies 261 and 281 in the direction away from the passage opening 14 along the longitudinal edge of the platform 2. It is possible to make the passenger think that it is impossible to move, and it is possible to prevent the passenger from moving in the direction away from the passage opening 14 along the longitudinal edge of the platform 2. Actually, since the support bodies 281 and 301 rotate when the passenger applies force, the support bodies 281 and 301 extend along the longitudinal edges of the platform 2 as shown by a one-dot chain line in FIG. When moving in a direction away from the passage opening 14, detection means for detecting this, for example, a limit switch is provided for each of the supports 281 and 301. Thereby, it is possible to detect that the passenger is moving in a direction away from the passage opening 14 and the second photoelectric sensor is not in a detection state although there is no need.

  A third embodiment is shown in FIGS. 3 (a) to 3 (c). In the second embodiment, the poles 18 and 20 for the first photoelectric sensor and the rotating posts 261 and 281 for the second photoelectric sensor are separately provided. In the third embodiment, these poles 18 and 20 are provided separately. It is integrated. Since other configurations are the same as those of the second embodiment, the same parts are denoted by the same reference numerals, and description thereof is omitted.

  Fixed struts similar to the poles 18, 20, for example, fixed poles 181, 201, are erected substantially perpendicular to the floor surface of the platform 2 on both sides of the passage opening 14. As in the second embodiment, the fixed poles 181 and 201 are provided with the light projectors 22e and 24e and the light receivers 22r and 24r of the first photoelectric sensor.

  Supporting bodies, for example, fence-like bodies 2601 and 2801 are attached to the fixed poles 181 and 201 so as to be rotatable. Reference numerals 2602, 2603, 2802, and 2803 indicate rotation support members that do not block the optical axis between the projectors 22 e, 24 e, 22 r, and 24 r of the first photoelectric sensor on the fence-like bodies 2601 and 2801. Are provided respectively. The support bodies, for example, the fence-like bodies 2601 and 2801 are formed in, for example, a substantially trapezoidal shape formed on a hypotenuse that is located on the outer side as the outer edges thereof are directed downward from above. This corresponds to the fact that the building limit differs depending on the height position of the platform 2 from the floor surface, and the position where the height is high is closer to the platform door device 4 side than the longitudinal edge of the floor surface of the platform 2. is there. At the lower ends of the fence-like bodies 2601 and 2801, projectors 34e and 36e and light receivers 34r and 36r of the second photoelectric sensor are provided as in the second embodiment. Although not shown, automatic return means, for example, return springs are provided on the fence-like bodies 2601 and 2801. Further, the limit switches described in the second embodiment are also provided for the fence-like bodies 2601 and 2801. Note that the fence-like bodies 2601 and 2801 may be configured by plate-like bodies, or may have a structure in which a net is attached to a trapezoidal frame.

  The safety device of the third embodiment operates in the same manner as the safety device of the second embodiment, and only the poles 181 and 201 are provided in common for the first and second photoelectric sensors. Therefore, the configuration can be simplified and the size can be reduced.

  In each of the above embodiments, the first photoelectric sensors, ie, the projectors 22e and 24e and the light receivers 22r and 24r are provided in order to detect the presence or absence of passengers in the vicinity of the passage opening 14. Can also be removed. In the first embodiment, the arms 26 and 28 are provided on the rotary columns 30 and 32. However, similarly to the third embodiment, the arms 26 and 28 can be rotatably attached to the poles 18 and 20. In the second and third embodiments, limit switches are provided for the fence-like bodies 261, 281, 2601, 2801. However, limit switches are provided for the arms 26, 28 in the first embodiment. You can also. The fence-like bodies 2601 and 2801 used in the third embodiment can also be used in the second embodiment.

It is the top view, front view, and side view of the platform door apparatus which implemented the safety device of the 1st Embodiment of this invention. It is the top view of the platform door apparatus which implemented the safety device of the 2nd Embodiment of this invention, a front view, and a side view. It is the top view, front view, and side view of the platform door apparatus which implemented the safety device of the 3rd Embodiment of this invention.

Explanation of symbols

2 Platform 4 Platform door device 6 Train 16 Door 18, 20 Pole 26 28 Arm (support)
22e, 24e Floodlight (transmission type photoelectric sensor)
22r, 24r light receiver (transmission type photoelectric sensor)
261 281 Fence (support)
2601, 2801 Fence (support)

Claims (7)

A safety device for a platform door device for detecting passengers present in the area between the train and the door of the platform door device,
Two supports respectively disposed on both sides of the door in the region and provided on the platform so as to be rotatable about an axis substantially perpendicular to the floor of the platform on the door side of the platform;
In a detectable state in which the front ends of these supports are on the train side, a transmissive photoelectric sensor provided on the support so as to pass the optical axis between the supports,
When the force that holds the support in the detection state and rotates the support around the axis is applied to the support, the support is rotated around the axis, and when the force disappears A self-return means provided for each of the supports so as to automatically return the support to the detection state;
A safety device for the platform door device provided.   The safety device for a platform door device according to claim 1, wherein a tip end portion of the support body is positioned in the vicinity of the platform building limit in the detection state.   The platform door device safety device according to claim 1, wherein the support is an arm installed in the vicinity of a floor surface of the platform.   The platform door device safety device according to claim 1, wherein the support is formed in a fence shape.   2. The safety device for a platform door device according to claim 1, wherein another transmissive photoelectric sensor for passing an optical axis between the doors is provided at a position closer to the door than an optical axis through which the transmissive photoelectric sensor passes. Platform door device safety device.   2. The safety device for a platform door device according to claim 1, wherein another transmission type photoelectric sensor for passing an optical axis between the doors is provided on a column passing through each of the shafts, and the support is separated from the column in the detection state. A safety device for a platform door device provided so as to protrude toward the train side.   7. The safety device for a platform door device according to claim 6, wherein the support is formed in a fence shape that prevents a passerby from moving between the door and the train beyond the support in the detection state. Platform door device safety device.

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