JP2010012977A - Device for detecting article fallen from platform - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for detecting an article fallen from a platform for certainly detecting a fallen article with a simple structure, and having a large cost merit. <P>SOLUTION: The device for detecting the article fallen from the platform includes a detection line (8) stretched along an end edge of the platform (2) in a lower area of the end edge while separating from a track surface (4), and having flexibility; a detection switch (22) having a detector (16) coupled to one end of the detection line (8) and actuated when the detector (16) is pulled by the detection line (8); and an electric circuit generating a signal by the actuation of the detection switch (22). <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a home fallen object detection device that detects a fallen person or a fallen object from a station platform.

As a method of detecting a fallen person or a fallen object (hereinafter referred to as “falling object”) from a station platform, a direct detection method for detecting the weight of the fallen object and the impact force at the time of the fall, and a measurement with a camera or the like were used. An indirect detection method is known in which the presence or absence of a fallen object is detected by software processing from the situation of the home or around the home.
As a direct detection method, a detection method using a fall detection mat having switching means arranged along a track under the platform is known (for example, Patent Document 1). A method is also known in which a rigid pipe is arranged on the side wall of the platform and the sleepers of the track and is detected by a tape switch provided on the upper surface of the pipe (for example, Patent Document 2). Furthermore, a method is also known in which a metal net is disposed along a track under the platform and detected by a vibration detection cable stretched on the net (for example, Patent Document 3).

Further, as an indirect detection method, a method is known in which the state of a home is monitored by an image sensor such as a camera and a falling object is detected by image processing based on the data (for example, Patent Document 4).
Japanese Patent Publication No. 5-73179 JP 2002-321613 A JP-A-9-193789 Japanese Patent No. 4041678

In the above-described direct detection method, in order to detect a fallen object from the station platform, it is necessary to install a large number of electrical equipment such as switches over the entire length of the platform, resulting in an increase in equipment cost. Further, since the electrical equipment is installed over the entire length of the home, there is a problem that maintenance labor for the insulation deterioration of the electrical equipment due to secular change becomes large.
In addition, in the indirect detection method described above, when processing an image obtained by an image sensor such as a camera, it is difficult to completely eliminate the influence of disturbances such as outdoor weather and solar radiation only by software processing, Problems remain in terms of detection accuracy. When an auxiliary device such as auxiliary lighting is provided to eliminate disturbance, a problem arises in terms of cost.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a home fallen object detection device having a large cost merit capable of reliably detecting a fallen object with a simple configuration. There is to do.

  In order to achieve the above-described object, the home fallen object detection device according to claim 1 has a flexible detection that is stretched in a state of being separated from the track surface along the edge in a region below the home edge. A detection switch that is connected to one end of the detection line and is activated when the detection element is pulled by the detection line; and an electric circuit that generates a signal by the operation of the detection switch. It is characterized by providing.

According to a second aspect of the present invention, there is provided the home fallen object detection device according to the first aspect, further comprising an elastic member that is coupled to the detector and urges the detection wire in a direction in which tension is applied.
According to a third aspect of the present invention, there is provided the home fallen object detection device according to the first aspect, wherein the electric circuit includes a self-holding circuit that continuously generates the signal when the detection switch is activated.

According to a fourth aspect of the present invention, there is provided the home fallen object detection device according to the third aspect, wherein the electric circuit includes a reset switch for resetting the self-holding circuit.
According to a fifth aspect of the present invention, there is provided the home fallen object detection device according to the first aspect, further comprising a holding member that holds the intermediate portion of the detection line so as to be movable in the longitudinal direction and at a height away from the track surface. It is characterized by.

  According to the home fallen object detection device of the first aspect of the present invention, when an object falls from the home edge to the lower region, the detection line is pushed down by the object, and the detector is pulled by the detection line. Then, the detection switch is activated and the electric circuit generates a signal. As a result, it is possible to operate an alarm device that informs the staff of the station or the train driver of the fall, or to operate an emergency stop device of the train.

In addition, for example, the entire length of the home can be covered with a single detection line, and an electric circuit for detecting the fall is only required to be provided at one end of the detection line. Not only can the daily maintenance of the electrical circuit be performed easily.
According to the home fallen object detection device of the second aspect, since the elastic member for applying tension to the detection line is connected to the detector, the sensitivity of the detection device can be set by appropriately setting the biasing force by the elastic member. Can be set to a desired value.

  According to the home fallen object detection device of claim 3, since the electric circuit includes a self-holding circuit that continuously generates the signal when the detection switch is activated, for example, the fallen object falls from the home. Even after the detection line is pushed down, the signal can continue to be generated even in a situation where the detection line is no longer pushed down by rolling to the side of the detection line.

According to the home fallen object detection device of claim 4, since the electric circuit includes a reset switch for resetting the self-holding circuit, after detecting the fallen object, safety measures and confirmation can be taken. Then, the self-holding circuit can be easily reset by operating the reset switch.
According to the home fallen object detection device of the fifth aspect of the invention, since the holding portion that holds the intermediate portion of the detection line is movable in the longitudinal direction and at a height away from the track surface, Even when the home is curved, the detection lines can be arranged along a desired detection region by providing an appropriate number of the holding members along the home. Even if the home is a straight line, by providing an appropriate number of the holding members along the home, the range in which the detection line bends by one falling object is partitioned and shortened. The amount of displacement of the detector with respect to the amount of deflection can be increased, thereby increasing the detection accuracy.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a plan view showing an entire home fallen object detection device according to an embodiment of the present invention, FIG. 2 is a view taken along the arrow II in FIG. 1, and FIG. 3 is an arrow along the line III-III in FIG. FIG. 4 is a sectional view showing a detection switch of the detection device, FIG. 5 is an electric circuit diagram of the detection device, and FIG. 6 is a schematic diagram for explaining the operation of the detection device.

  As shown in FIG. 1, the home 2 is provided along the track 6 of the track surface 4. In the region below the edge 2a of the home 2, one detection line 8 is stretched along the edge 2a. One end of the detection line 8 is connected to an anchor member 10 fixed to the side wall of the home 2, and the other end is connected to a switch device 12 fixed to the side wall of the home 2. Further, the detection line 8 is held by a holding member 14 whose intermediate portion is fixed to the side wall of the home 2 so as to be movable in the longitudinal direction. As is apparent from FIGS. 2 and 3, the anchor member 10, the switch device 12, and the holding member 14 are arranged such that the detection line 8 is positioned at a predetermined height h from the track surface 4. The detection line 8 is formed of a flexible member such as a wire rope or a canvas belt.

  As shown in FIG. 4, the switch device 12 is fixed to the side wall of the home 2, and includes a main body 18 that houses a detector 16 connected to one end of the detection wire 8, and between the detector 16 and the main body 18. A tension spring 20 and a detection switch 22 that operates according to the displacement of the detector 16 relative to the main body 18 are provided. The detection switch 22 has contacts 22 a and 22 b attached to the main body 18 and a contact 22 c attached to the detector 16. The urging force of the spring 20 is set so that the detection line 8 is stretched linearly in a normal state and the detector 16 is displaced with respect to the main body 18 when the detection line 8 is pushed downward by a fallen object from the home. . Regarding the relationship between the contacts 22a and 22b and the contact 22c, the contacts 22a and 22b and the contact 22c are normally in contact with each other (FIG. 4A), and when the detector 16 is displaced by being pulled by the detection line 8, the contacts 22a and 22b are contacted. 22b and the contact 22c are separated (FIG. 4B). This switch can be multiplexed by arranging a plurality of points. Moreover, it can comprise as a non-contact switch by the proximity switch using a magnetic field, an electrostatic capacitance, etc. instead of a metal electrode.

  The detection switch 22 is included in the electric circuit shown in FIG. In the electric circuit, the first relay has a coil 24 and three switches 24 a, 24 b and 24 c that are driven by excitation of the coil 24. The switches 24a and 24c are normally open switches, and the switch 24b is a normally closed switch. The second relay includes a coil 26 and a switch 26 a that is driven by excitation of the coil 26. The switch 26a is a normally open switch.

  The detection switch 22 is connected in series to the coil 24 and the switches 24 a and 26 a connected in parallel to each other. The reset switch 28 is connected in series with the switch 24b and the coil 26 and the capacitor 30 connected in parallel with each other. The reset switch 28 is a normally open switch. The switch 24c is connected in series to a coil 32 of a signal generation relay for generating a signal indicating a fall. The signal generating relay generates a signal indicating a drop when not excited. Further, the signal is transmitted so as to activate a well-known alarm device (not shown) for notifying a station attendant or a train driver of the fall or to activate a well-known emergency stop device for a train (not shown).

  Next, the operation of the home fallen object detection device configured as described above will be described. First, when using this apparatus, the reset switch 28 is turned on to excite the coil 26 of the second relay. Even when the operation time of the reset switch 28 is extremely short, that is, when the reset switch 28 returns from on to off in a short time, the coil 26 of the second relay is excited for a predetermined time due to the discharge of the capacitor 30. Maintained. The switch 26a is turned on by exciting the coil 26 of the second relay. At this time, if there is no fallen object, the switch device 12 is in the state shown in FIG. 4A, and the detection switch 22 is on. For this reason, the coil 24 of the first relay is excited, the switch 24a is turned on, the switch 24b is turned off, and the switch 24c is turned on. The first relay is kept on by turning on the switch 24a. When the switch 24b is turned off, the second relay 26 is turned off and the switch 26a is turned off. When the switch 24c is turned on, the coil 32 of the signal generation relay is turned on. As a result, the signal generation relay does not generate a signal indicating a drop.

  Then, as shown in FIG. 6, when the fallen object S falls from the home 2 and pushes down the detection line 8, the detection element 16 is pulled by the detection line 8, and the detection switch as shown in FIG. 4B. 22 is turned off. When the detection switch 22 is turned off, the coil 24 of the first relay is de-energized, the switch 24a is turned off, the switch 24b is turned off, and the switch 24c is turned off. When the switch 24c is turned off, the signal generating relay coil 32 is de-energized to generate a signal indicating a drop.

In this state, even if the detection switch 22 is subsequently turned on, since the switches 24a and 26a are turned off, the coil 24 of the first relay remains in a non-excited state, and the switch 24c is turned off and the signal generating relay is turned off. The non-excited state of the coil 32 is continued. In this way, a self-holding circuit is configured.
According to the home fallen object detection device configured as described above, it is possible to reliably detect a fallen object from the edge 2a of the home 2 and generate a signal informing the fall. In addition, for example, the entire length of the home 2 can be covered with a single detection line 8, and it is sufficient to provide an electric circuit for detecting a fall at one end of the detection line 8. Therefore, the cost can be reduced. Not only can the daily maintenance of the electrical circuit be performed easily.

Further, since the spring 20 that applies tension to the detection line 8 is connected to the detector 16, the sensitivity of the detection device can be set to a desired value by appropriately setting the urging force of the spring 20.
Furthermore, since the electric circuit including the detection switch 22 includes a self-holding circuit that continuously generates a signal by the signal generation relay when the detection switch 22 is turned off, for example, the falling object S falls from the home 2. Even when the detection line 8 is pushed down and then rolled to the side of the detection line 8 and the detection line 8 is no longer pushed down, the signal generated by the signal generation relay continues to be generated. If the safety measure and confirmation are obtained after detecting the falling object S, the self-holding circuit can be easily reset by operating the reset switch 28.

  Furthermore, since the holding member 14 that holds the intermediate portion of the detection line 8 at a height h that is movable in the longitudinal direction and away from the track surface 4 is provided, for example, when the home 2 is curved. However, by providing an appropriate number of holding members 14 along the home, the detection lines 8 can be arranged along a desired detection region. Even if the home 2 is a straight line, by providing an appropriate number of holding members 14 along the home 2, the range in which the detection line 8 is bent by the fallen object S is partitioned and shortened. The amount of displacement of the detector 16 with respect to the amount of bending can be increased, whereby the detection accuracy can be increased.

Although the description about the embodiment of the home falling object detection device according to the present invention has been completed above, the embodiment is not limited to the above embodiment.
For example, in the above embodiment, the tension is applied to the detection wire 8 by the spring 20, but instead, a connecting member such as a steel wire having a strength that can be broken by a predetermined load can be employed. The connecting member is set to have such a strength as to break when the detection line is pushed down by a fallen object and the detector is pulled. According to this configuration, since the detection switch does not return simultaneously with the detection of the falling object, the detection output can be reliably held. Conversely, even if the self-holding circuit is not provided in the electric circuit including the detection switch, it is possible to continuously generate a signal that informs the drop.

Further, a weight can be employed instead of the spring 20. In that case, a cable with a weight attached thereto is appropriately connected to a connector via a pulley so that gravity by the weight acts as a tension on the detection line.
Furthermore, in the above embodiment, the single detection line 8 is provided over the entire length of the home 2, but when the home 2 is very long, a plurality of main detection devices are arranged in series and used. Can do. If necessary, a plurality of detection lines 8 can be arranged in parallel and used.

It is a top view which shows the whole home fallen object detection apparatus which concerns on one Embodiment of this invention. It is an arrow line view which follows the arrow II of FIG. FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 2. It is sectional drawing which shows the detection switch 22 of this detection apparatus. It is an electric circuit diagram of this detection apparatus. It is the schematic explaining the action | operation of this detection apparatus.

Explanation of symbols

2 Home 4 Track surface 8 Detection line 12 Switch device 14 Holding member 16 Detector 22 Detection switch

Claims (5)

A flexible sensing line stretched in a region below the home edge along the edge away from the track surface;
A detection switch connected to one end of the detection line, the detection switch operating when the detection element is pulled by the detection line;
And an electric circuit that generates a signal by the operation of the detection switch.   The home fallen object detection device according to claim 1, further comprising an elastic member connected to the detector and biasing in a direction in which a tension is applied to the detection line.   2. The home falling object detection device according to claim 1, wherein the electric circuit includes a self-holding circuit that continuously generates the signal when the detection switch is operated.   The home falling object detection device according to claim 3, wherein the electric circuit includes a reset switch that resets the self-holding circuit.   The home fallen object detection device according to claim 1, further comprising a holding member that holds an intermediate portion of the detection line so as to be movable in a longitudinal direction of the detection line and at a height away from the track surface.

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