JP6081192B2 - Platform fall prevention device - Google Patents

Description

  The present invention relates to a platform fall prevention device that is installed on a platform of a station in a railway and closes a gap between a train and a platform edge.

  In recent years, the number of stations where platform fall prevention devices are installed has increased. The platform fall prevention device is also referred to as a movable step device or the like, and is a device that projects a fall prevention plate (also called a step) from the platform when getting on and off the train and closes the gap between the train and the platform. The platform fall prevention device accommodates the fall prevention plate on the platform side except when getting on and off, while projecting it to the track side when getting on and off the train, narrowing the gap between the platform and the train to prevent the fall (For example, see Patent Document 1 and Patent Document 2).

JP-A-2005-14805 JP 2009-126490 A

  The conventional platform fall prevention device includes a brake for preventing the fall prevention plate from moving due to a reaction force when a passenger steps on the fall prevention plate with the fall prevention plate protruding from the platform when getting on and off the train. A mechanism and a lock mechanism are provided.

  And since the brake mechanism and the lock mechanism in the conventional platform fall prevention device operate using electromagnetic force as described in Patent Document 1 and Patent Document 2, in order to transition between the operating state and the released state Requires power. For this reason, if a power interruption occurs in a state where the fall prevention plate does not complete the protrusion or the housing, the brake of the electric drive mechanism operates and the manual drive cannot be performed. Since the train cannot be operated while the fall prevention plate is protruding or being accommodated, the train cannot be operated until the power is restored. In order to avoid such a situation, a backup power source for performing a release operation is required so that a command to release the brake can be issued even when a failure or a power failure occurs.

  The present invention has been made in view of such circumstances, and the fall prevention plate is moved by a reaction force when a passenger gets on the fall prevention plate with the fall prevention plate protruding from the platform when getting on and off the train. An object of the present invention is to realize a platform fall prevention device including a lock mechanism that prevents and requires no electric power for the activation / release state transition. It is another object of the present invention to provide a platform fall prevention device that can accommodate and protrude a fall prevention plate by manual drive without providing a backup power source even when the power is shut off.

  A first invention for solving the above-described problems is a platform fall for projecting a fall prevention plate (for example, the fall prevention plate 16 in FIGS. 1 and 2) when getting on and off to block a gap between the platform and the train that is stopped. A lock block (for example, lock blocks 52R and 52L in FIG. 2) that changes between a lock operation state that suppresses the movement of the fall prevention plate and a lock release state that releases the suppression, and a drive range. And a driving plate (for example, the driving plate 30 in FIGS. 2 and 4) having a predetermined structure (for example, the cam portion 51 in FIG. 4) for causing the lock block to change state. A platform fall prevention device including a drive mechanism unit (for example, the drive mechanism unit 20 in FIG. 2) that moves the fall prevention plate forward and backward by driving in a forward and backward direction of the fall prevention plate.

  That is, the lock block makes a transition between a lock operation state that suppresses the movement of the fall prevention plate and a lock release state that releases the suppression, and the state transition of the lock block is in the drive range configured on the driving plate. It functions according to the predetermined structure of the end area. Further, the driving plate is driven in the advancing / retreating direction of the fall prevention plate by the drive mechanism unit, and the fall preventing plate is moved in the advancing / retreating direction by driving the driving plate.

According to a second aspect of the present invention, the drive mechanism portion is not engaged in the end region, but is engaged and driven when the driving plate moves beyond the end region in the forward / backward direction, and the fall prevention 2 is a platform fall prevention device for a platform according to a first aspect of the present invention , which has a driven plate (for example, the driven plate 40 in FIG. 2) for moving the plate back and forth.

  In other words, the driven plate is provided with a driven plate that moves the fall prevention plate back and forth by following the driven plate, but this driven plate does not engage with the driven plate in the end region of the driven plate that changes the state of the lock block.

  A third invention is the platform anti-falling device according to the second invention, wherein the lock block inhibits the movement of the fall prevention plate by inhibiting the movement of the driven plate.

  That is, the lock block itself suppresses the movement of the driven plate.

  According to a fourth aspect of the present invention, the lock block operates in a direction crossing the advance / retreat direction, locks the position where the follower plate is prevented from moving in the advance / retreat direction in the lock operating state, and releases the restraint. It is a fall prevention device for platforms of the 3rd invention which changes the state as a release state.

  That is, the movement direction related to the state transition of the lock block is set to a relationship that intersects the movement direction of the driven plate, and the lock block is positioned in the movement direction of the driven plate to suppress the movement.

  According to a fifth aspect of the present invention, the driving plate has a cam portion having an inclined cam surface at an end, and the lock block is pressed toward the cam surface by an urging member. The platform fall prevention device according to any one of the first to fourth aspects, wherein the state transition is performed in the end region by operating along the edge region.

  That is, the cam mechanism is used as a configuration for changing the state of the lock block.

  According to a sixth aspect of the present invention, the lock block has a mark at a predetermined position, and whether or not the mark is displayed or the lock block is in the lock operation state based on the display position of the mark. A platform fall prevention device according to any one of the first to fifth aspects of the invention, comprising a confirmation window capable of confirming whether or not.

  That is, a mark is provided at a predetermined position of the lock block, and a confirmation window for visually recognizing the mark is provided so that it can be confirmed whether or not the lock block is in the lock operation state.

  A seventh invention is the platform fall prevention device according to any one of the first to sixth inventions, wherein the drive mechanism section is configured to be capable of manual driving by a handwheel handle in addition to electric driving by a motor.

  That is, the drive mechanism unit that moves the driving plate and the fall prevention plate is configured to be driven by a handwheel.

  According to the first to sixth inventions, it is possible to realize a platform fall prevention device in which the state transition of the lock operation / unlock is mechanically performed. Therefore, it is not necessary to prepare a special controller or a standby power supply in preparation for a failure or power interruption. Further, unlike the conventional platform fall prevention device, the drive mechanism and the lock mechanism are not dispersed, so that a sensor for confirming the operation between the mechanisms becomes unnecessary. Furthermore, since no solenoid or brake for the locking mechanism is provided, the frequency of equipment failures can be reduced, and the frequency of inspection can be reduced.

In addition, according to the second aspect of the present invention, the torque for changing the state of the lock block and the torque for moving the follower plate and the fall prevention plate are not required at the same time. That is, a driving torque required for driving the apparatus is small.
In addition, the fall prevention plate is indirectly linked to the driving plate and the lock block via the driven plate, so that the lock plate is locked compared to the case where it is directly connected to the driving plate without using the driven plate. Fine movement and vibration associated with activation / release are difficult to be transmitted to the fall prevention plate side. Reduces unnecessary rattling and vibrations, and improves durability.

  In the sixth invention, the lock operation state / release state can be further visually confirmed. Furthermore, in the seventh invention, it becomes possible to manually move the device at the time of a power failure.

The top view and side view of the fall prevention apparatus 10 for platforms in the installation state. The perspective top view which shows the internal structure accommodated in the internal space of the fall prevention apparatus for platforms. The figure which looked at the track | orbit direction from the BB cross section of FIG. 1 which shows the internal structure accommodated in the internal space of the fall prevention apparatus for platforms. FIG. 3 is a three-view diagram illustrating a configuration example of a driving plate. The three-plane figure which shows the structural example of a follower board. FIG. 3 is a three-side view for explaining an engagement relationship between a driving plate and a driven plate. FIG. 3 is a three-side view illustrating a configuration example of lock blocks 52R and 52L. The figure which shows the protrusion completion state of a fall prevention board among operation | movement of the fall prevention apparatus for platforms. The figure which shows the state by which the lock | rock was cancelled | released among operation | movement of the fall prevention apparatus for platforms. The figure which shows the state which the fall prevention board started the movement among operation | movement of the fall prevention apparatus for platforms. The figure which shows the state which the movement of the fall prevention board was completed among the operation | movement of the fall prevention apparatus for platforms, and the lock operation was started. The figure which shows the storage completion state of a fall prevention board among operation | movement of the fall prevention apparatus for platforms. The figure which shows the example of a handwheel handle and its attachment structure.

An outline of a platform fall prevention device to which the present invention is applied will be described.
FIG. 1 is a (1) top view and (2) side view of a platform fall prevention device 10 in an installed state. The platform fall-preventing device 10 is fitted and fixed in an installation space 3 that is recessed in the upper part of the line side end of the platform 2 of the station.

  The platform fall prevention device 10 defines a thin rectangular internal space that opens to the track side by a main frame 14 fixed in the installation space 3 and a top plate 12 that contacts the lid, and the fall prevention is provided in the internal space. The plate 16 is supported by a ball bearing type slide rail 18 so as to be slidable substantially horizontally, and can be moved forward and backward by the drive mechanism 20 to the track side / home side.

Except when getting on and off, the fall prevention plate 16 is in a position where the entire plate is accommodated in the internal space so that the end of the track side does not protrude toward the track side, and the fall prevention plate 16 is operated by the lock mechanism 50 being locked. Movement is suppressed and the state is maintained. This state is called “accommodation complete state”.
At the time of getting on and off the train 4, the lock mechanism 50 is shifted to the unlocked state as the drive mechanism 20 is operated, and the fall prevention plate 16 is projected to the track side so that the gap between the platform and the train 4 is reached. D is narrowed to prevent the fall. This state is called a “projection completion state”. When the “projection completion state” is reached, the lock mechanism unit 50 automatically shifts to the lock operation state, the movement of the fall prevention plate 16 is suppressed, and the fall prevention plate 16 during getting on and off is maintained in the projection completion state by the lock mechanism unit 50. Is done. FIGS. 1A and 1B both show this “projection completion state”.
When the boarding / exit is completed, the drive mechanism unit 20 reverses and the lock mechanism unit 50 shifts to the unlocked state, the fall prevention plate 16 moves to the home side, and when the “accommodation complete state” is reached, the lock mechanism unit 50 is again turned on. The state automatically shifts to the lock operation state, the fall prevention plate 16 returns to the accommodation completion state, and is locked in that state.

  That is, the lock mechanism unit 50 according to the present embodiment automatically shifts to the lock operation state when the drive mechanism unit 20 is in the housing completion state / projection completion state, and inputs (for example, passengers) from the fall prevention plate 16 side. Therefore, it is possible to maintain the lock operation state against a reaction force or the like generated when trying to get into the fall prevention plate 16. On the other hand, the lock mechanism unit 50 follows the normal operation of the fall prevention plate 16 starting from the operation of the drive mechanism unit 20, and can automatically transition to the unlocked state. To release the lock, no electric power is required unlike the conventional movable step device.

Next, the configuration of the drive mechanism unit 20 and the lock mechanism unit 50 will be described in detail.
2 and 3 are views showing an internal structure according to the present invention housed in the internal space of the platform fall prevention device 10. FIG. 2 shows the top plate 12, the main frame 14, and the fall prevention plate 16. FIG. 3 corresponds to a view seen from the cross-section BB in FIG. Since the slide rail 18 can appropriately use a known technique, description and illustration are omitted.

  The drive mechanism unit 20 rotates the drive pulley 21 and the driven pulley 22 arranged along the advancing and retreating direction of the fall prevention plate 16 on the bottom surface of the main frame 14, the timing belt 23 that is turned around these, and the drive pulley 21. And a motor 24 to be operated. The motor 24 is driven and controlled by receiving a signal from a controller installed outside. In connection with the response at the time of power shut-off described later, the motor 24 does not have a built-in brake mechanism, or even if it has a braking force that can release the brake when it is rotated manually, or can be rotated manually. And In addition, a signal cable or the like for supplying power to the motor 24 or transmitting a control signal to a controller that controls the motor 24 is appropriately provided, and description and illustration thereof are omitted in this specification.

  Further, the drive mechanism unit 20 includes a driving plate 30 that slides in the advancing and retreating direction of the fall prevention plate 16 as the timing belt 23 rotates, and a driven plate 40 that is driven by the movement of the driving plate. A configuration using a belt, a chain, and a ball screw instead of the timing belt 23 is also possible.

FIG. 4 is a three-sided view showing a configuration example of the driving plate 30, (1) a top view, (2) a side view seen from the timing belt side, and (3) a side view seen from the track side from the home side. It corresponds to. The driving plate 30 includes a main portion 31 that is long in the advancing and retreating direction of the fall prevention plate 16, a guide groove 33 in which a guide rail 32 fixed to the bottom surface of the main frame 14 is fitted on the lower surface of the main portion 31, and the main portion 31. And a connecting arm 34 extending toward the timing belt 23. The connecting arm 34 is gripped and connected to the timing belt 23 that is stretched in parallel with the guide rail 32.
That is, when the timing belt 23 rotates, the driving plate 30 moves along the guide rail 32 and moves directly in the advancing / retreating direction of the fall prevention plate 16.

  FIG. 5 is a three-sided view showing a configuration example of the driven plate 40, (1) a top view, (2) a side view seen from the timing belt side, and (3) a side view seen from the track side from the home side. It corresponds to. The driven plate 40 is a plate material that is attached to the lower surface of the fall prevention plate 16 with, for example, a bolt or the like. It should be noted that mounting bolt holes and the like are appropriately provided, and description and illustration are omitted in this specification.

  On the lower surface of the main plate 41 of the driven plate 40, a pair of home side engagement pieces 42 and track side engagement pieces 44 arranged along the advancing and retreating direction of the fall prevention plate 16 are provided. The installation interval L1 between the home-side engagement piece 42 and the track-side engagement piece 44 is wider than the width W of the connecting arm 34 of the driving plate 30 (the length in the direction in which the fall prevention plate 16 advances and retreats: see FIG. 4). .

  Then, as shown in FIG. 6, the driven plate 40 is combined so as to overlap the driving plate 30 so as to sandwich the connecting arm 34 along the advancing / retreating direction of the fall prevention plate 16. If attention is paid to the relationship between the connecting arm 34, the home-side engaging piece 42 and the track-side engaging piece 44, the driving plate 30 and the driven plate 40 are engaged with a play of a margin length L2 (= W−L1). Yes.

  Since the downward length L3 of the home side engaging piece 42 and the track side engaging piece 44 is set so as to reach the side surface of the connecting arm 34, the driving plate 30 moves linearly in the forward / backward direction of the fall prevention plate 16. Then, the connecting arm 34 hits either the home-side engaging piece 42 or the track-side engaging piece 44 and pushes the engaging piece to move the driven plate 40 and the fall prevention plate 16. A follower plate stopper 46 is erected from the bottom surface of the main frame 14 on the movement path track side of the follower plate 40 (see FIG. 2), and movement is caused by the contact of the track plate side surface of the follower plate 40 with this. Limited. That is, the upper limit of the protrusion amount of the fall prevention plate 16 is set.

  When the moving direction is reversed, the driving plate 30 starts moving integrally with the timing belt 23. The connecting arm 34 moves away from the engaging piece that has been in contact so far, moves to the opposite engaging piece, and comes into contact with the connecting piece 34 to move the driven plate 40 and the fall prevention plate 16 in the reverse direction. A driven plate stopper 46 is also erected from the bottom surface of the main frame 14 on the moving path home side of the driven plate 40 (see FIG. 2), and movement is caused by the contact of the side surface of the driven plate 40 on the home side. Limited. That is, the upper limit of the amount of the fall prevention plate 16 is set.

  Since the driving plate 30 and the driven plate 40 are thus engaged with a margin length L2, the connecting arm 34 is moved from one engaging piece to the other engaging piece when the moving direction is reversed. The moving plate 30 is moved but the driven plate 40 is not moved (not engaged) until it is moved. The margin length L2 and the time difference between the start of movement of the driving plate 30 and the driven plate 40 are important factors for unlocking the lock mechanism 50. In addition, it is important that there is a period in which the driving plate 30 and the driven plate 40 are not engaged in the end region in the range in which the driving plate 40 can be driven in the forward / backward direction.

Next, the configuration of the lock mechanism unit 50 will be described.
As shown in FIG. 2, the lock mechanism unit 50 is installed on the opposite side of the timing belt 23 with the driving plate 30 interposed therebetween. The lock mechanism portion 50 includes a cam portion 51 provided on the driving plate 30 and two lock blocks 52R and 52L following the cam portion 51. The lock blocks 52 </ b> R and 52 </ b> L are rod-shaped cam followers that are engaged with the cam portion 51, and are a pair of block guides erected on the main frame 14 along a direction orthogonal to the advancing / retreating direction of the fall prevention plate 16. 53.

  The cam portion 51 has a predetermined structure that causes the lock blocks 52R and 52L to change states in the end region of the driving range of the driving plate 30, and is configured using the side surface of the main portion 31 of the driving plate 30. Specifically, it functions as a cam surface on the side surface opposite to the timing belt 23 (upper side in FIG. 2). The difference in distance from the guide rail 32 to the side surface determines the cam profile. As shown in FIG. 4, the cam profile of this embodiment has a high lift area 51 b at the center of the main part 31, and low lift areas 51 a at both ends of the main part 31 in the advancing / retreating direction. These lift areas are connected by an inclined surface 51c. The total width of the low lift area 51a and the inclined surface 51c (the length in the direction in which the fall prevention plate 16 advances and retreats) is set to have at least a margin length L2 (see FIG. 6).

  FIG. 7 is a three-view diagram illustrating a configuration example of the lock blocks 52R and 52L. (1) corresponds to a top view of the lock block 52R, and (2) corresponds to a side view of the lock block 52R as viewed from the track side from the home side. Further, (3) corresponds to a top view of the lock block 52L, and (4) corresponds to a side view of the lock block 52L as viewed from the track side.

  The lock blocks 52R and 52L have a cantilevered roller 56 on the back side (right side in FIGS. 7 (2) and 7 (4)) on one end (lower side in FIG. 7) on the driving plate 30 side. Pivot at.

  The lock blocks 52R and 52L include a guide pin 58 standing on the side surface of the other end (upper side in FIG. 7) opposite to the driving plate 30 and a coil spring 59. One end of the guide pin 58 (lower side as viewed in FIG. 7) is fixed to the lock blocks 52R and 52L, and the other end (upper side as viewed in FIG. 7) is a guide pin support plate erected from the bottom surface of the main frame 14. 60 guide holes 61 are inserted (see FIG. 2). The coil spring 59 is provided between the guide pin support plate 60 and the lock blocks 52R and 52L, and the guide pin 58 is inserted inside the coil.

  Accordingly, while the lock blocks 52R and 52L are guided by the block guide 53 and the guide pin 58 and are slidably supported along the bottom surface of the main frame 14 in a direction orthogonal to the advancing and retreating direction of the fall prevention plate 16, The coil spring 59 is always urged toward the driving plate 30. Since the corners of the lock blocks 52R and 52L are chamfered around the axis of the roller 56 at substantially the same angle as the inclined surface 51c of the cam portion 51, the lock blocks 52R and 52L are biased toward the cam portion 51. Even if this is done, the roller 56 abuts against the cam portion 51 with respect to the direct movement of the driving plate 30, and the lock blocks 52R and 52L operate smoothly.

The state of the lock blocks 52R and 52L is detected by a limit switch 66 (see FIG. 2) of a push-in switch provided on the side surface on the home side and the side surface on the track side.
Specifically, step-shaped portions 55 are respectively provided on the home side surface of the lock block 52R and the raceway side surface of the lock block 52L. The step-shaped portion 55 is provided at a position where the lock blocks 52R and 52L follow the cam portion 51 and pass in front of the limit switch 66 in the process of transition from the lock operation state to the lock release state. Therefore, whether or not the lock blocks 52R and 52L are in the lock operation state or the lock release state can be detected based on whether or not the limit switch 66 is pushed.

  Here, an important dimensional relationship will be described. The vertical thickness of the lock blocks 52R and 52L is set to be larger than the vertical thickness of the driving plate 30. When described with reference to the bottom surface of the main frame 14, the height H (see FIG. 7) to the upper end on one end side where the rollers 56 of the lock blocks 52R and 52L are cantilevered is the upper end height of the driving plate 30. It is set to be larger than Hg (see FIG. 4).

[Description of operation]
Next, the state transition of the lock mechanism 50 will be described while explaining the operation of the platform fall prevention device 10.
FIGS. 8-12 is a figure which shows the continuous transition state for demonstrating operation | movement of the fall prevention apparatus 10 for platforms. In each of the drawings, (1) corresponds to an overall schematic diagram, and (2) corresponds to an enlarged view of the lock mechanism unit 50.

  First, as shown in FIG. 8, a “projection completion state” in which the fall prevention plate 16 is projected is shown (corresponding to the state of FIGS. 1 to 3). In the projecting process of the fall prevention plate 16 that reaches this state, the driving plate 30 moves to the left in the figure, so that the track-side side surface of the connecting arm 34 abuts the track-side engagement piece 44 of the driven plate 40. Yes. Further, the home-side lock block 52 </ b> R is in the low lift region 51 a at the home-side end of the cam portion 51, and is in a lock operation state that suppresses the movement of the driven plate 40. The lock block 52L on the track side remains in the high lift area 51b.

If the fall prevention plate 16 further protrudes to the track side (left side in FIG. 8) from this state, the driven plate 40 abuts on the track-side driven plate stopper 46 to restrict the movement.
As described above, when the bottom surface of the main frame 14 is used as a reference, the height H (see FIG. 7) to the upper ends of the lock blocks 52R and 52L is higher than the upper end height Hg of the driving plate 30 (see FIG. 4). It is set to be large. Therefore, from this state, even if the fall prevention plate 16, that is, the follower plate 40 tries to move to the home side, the home side end surface of the follower plate 40 (particularly the position where the “pointer mark” is present) is the side surface on the track side of the lock block 52R. The movement is restricted when hitting. That is, the fall prevention plate 16 is restrained in the protruding completion state.

In the process of getting on and off and housing the fall prevention plate 16, first, the state transitions to the state of FIG.
When the motor 24 is driven counterclockwise, the timing belt 23 is also rotated counterclockwise and the driving plate 30 is moved to the home side. Since the driving plate 30 and the driven plate 40 are engaged with each other with a margin length L2, the connecting arm 34 of the driving plate 30 is separated from the track-side engaging piece 44 for a while after the drive of the motor 24 is started. Since it moves to the home side within the range of the length L2 (see FIG. 6), the state where the connecting arm 34 does not contact the home side engaging piece 42 continues. That is, the driven plate 40 does not move. FIG. 9 shows exactly that state. The driving plate 30 continues to move toward the home side until the connecting arm 34 comes into contact with the home side engaging piece 42. The lock block 52R continues to ascend the inclined surface 51c of the cam portion 51. Immediately after the drive of the motor 24 is started, vibrations at the start of movement of the driving plate 30 or vibrations due to movement of the lock block 52R may occur. Such vibration leads to a decrease in durability of the entire apparatus, and vibration of the fall prevention plate 16 and a sound accompanying the vibration may be transmitted to passengers. However, in the configuration of this embodiment, the fall prevention plate 16 is configured to be indirectly linked to the drive mechanism unit 20 via the driven plate 40, so that such vibrations are not easily transmitted to the fall prevention plate 16.

When the connecting arm 34 comes into contact with the home side engagement piece 42, the driven plate 40 moves to the home side integrally with the driving plate 30 as shown in FIG. At this time, the lock block 52R has already climbed the inclined surface 51c, reached the high lift area 51b, and has been unlocked. There is no lock block 52R on the home side of the driven plate 40, and the movement is not hindered. In other words, in the transition of FIGS. 8 to 10, the connecting arm 34 is released from the contact (engagement) with the track-side engagement piece 44 and is brought into contact (engagement) with the home-side engagement piece 42 on the opposite side. ) Corresponds to the end area of the driving range in the advancing / retreating direction of the driving plate 30. In this end area, the inclined surface 51c makes a transition between the lock operation state / unlock state. In terms of dimensions, the length of the end region has a margin length L2.
When the state shown in FIG. 10 is reached, the limit switch 66 on the home side is released.

When the motor 24 is driven counterclockwise, the state transitions to the state shown in FIG.
In this state, the track-side lock block 52 </ b> L starts to descend the slope 51 c at the track-side end of the cam portion 51. The home-side lock block 52R remains in the high lift area 51b.

  When the motor 24 is further driven counterclockwise, the “accommodation complete state” of FIG. 12 is finally reached. In this state, the side surface on the home side of the driven plate 40 abuts against the driven plate stopper 46 on the home side and movement is restricted. Further, the track-side lock block 52L is completely moved down the inclined surface 51c of the cam portion 51, reaches the low lift region 51a at the track-side end portion, and enters the lock operation state. Along with this, the limit switch 66 on the track side is pushed in, and a signal indicating that it is in the lock operation state is output to an external controller or the like that controls the drive of the motor 24, and the drive of the motor 24 is stopped.

  The process from the housing completion state to the projecting completion state follows the transition from FIG. 11 to FIG.

Next, countermeasures against power interruption of the platform fall prevention device 10 will be described.
As shown in FIG. 13 (1), a handwheel handle 90 is provided in the platform fall prevention device 10. A connecting hole 92 is provided at the upper end of the rotating shaft of the drive pulley 21 to insert and connect the handwheel handle 90.

  In addition, the platform fall prevention device 10 is provided with a confirmation window 96 on the top plate 12 so that the locked state can be visually confirmed (see FIG. 1). Further, on the upper surfaces of the lock blocks 52R and 52L, there is a mark 98 at a position adjusted in advance so as to come to a predetermined position (for example, directly below) with respect to the confirmation window 96 when the lock operation state is established ( (See FIGS. 7, 8, and 12). In other words, whether or not the mark 98 is displayed at a predetermined position or the display position of the mark 98 can be visually confirmed.

  When the power is shut off, the handle hatch 94 provided on the top plate 12 is opened (see FIG. 1), and the handle 90 is inserted into the connection hole 92 of the drive pulley 21 and connected as shown in FIG. As described above, the lock mechanism unit 50 of the present embodiment only needs to be driven by the drive mechanism unit 20 and moved by the driving plate 30 in order to transition to the lock operation state / unlock state. In other words, the drive pulley 21 only needs to rotate. The drive pulley 21 can be rotated by a handwheel handle 90.

  Therefore, the platform fall prevention device 10 can manually accommodate the fall prevention plate 16 or project the fall prevention plate 16. And if the fall prevention board 16 will be in an accommodation completion state, it will be in a mechanically restrained state (locked state), and the state can also be confirmed visually. The platform fall prevention device 10 does not need to have a spare power supply. Further, since the mechanisms are not dispersed, a sensor for confirming the operation between the mechanisms becomes unnecessary. Furthermore, since it is not necessary to provide a solenoid or a brake for the lock mechanism, the frequency of equipment failure can be reduced, and the frequency of inspection can be reduced.

The embodiment to which the present invention is applied has been described above. However, the application form of the present invention is not limited to the above, and it is possible to appropriately change, add, or omit constituent elements.
For example, although it has been described that the two lock blocks 52R and 52L corresponding to the locks in the projecting completion state and the housing completion state are provided, the projecting completion state and the housing completion state are configured to be lockable by one lock block. It is good as well. In this case, the limit switches 66 and 66 may be provided in the vicinity of the driven plate stoppers 46 and 46, for example, and may be substituted by detecting contact between the driven plate 40 and the driven plate stopper 46.

    DESCRIPTION OF SYMBOLS 2 ... Platform, 3 ... Installation space, 4 ... Train, 10 ... Platform fall prevention device, 12 ... Top plate, 14 ... Main frame, 16 ... Fall fall prevention plate, 18 ... Slide rail, 20 ... Drive mechanism part, 21 ... Drive pulley, 22 ... driven pulley, 23 ... timing belt, 24 ... motor, 30 ... driving plate, 31 ... rail, 31 ... main part, 32 ... guide rail, 33 ... guide groove, 34 ... connecting arm, 40 ... driven plate , 41 ... main plate, 42 ... home side engagement piece, 44 ... raceway side engagement piece, 46 ... driven plate stopper, 50 ... lock mechanism part, 51 ... cam part, 51a ... low lift area, 51b ... high lift area, 51c ... Inclined surface, 51c ... Inclined surface, 52L ... Lock block, 52R ... Lock block, 53 ... Block guide, 55 ... Stepped portion, 56 ... Roller, 58 ... Guide pin, 59 ... Coil sp 60 ... guide pin support plate, 61 ... guide hole, 66 ... limit switch, 90 ... handle, 92 ... connection hole, 92 ... connection height, 94 ... hatch for handle, 96 ... confirmation window, 98 ... mark, L1 ... Installation interval, L2 ... margin length

Claims (5)

A platform fall prevention device for projecting a fall prevention plate when getting on and off to block a gap between the platform and a stopped train,
A lock block that transitions between a lock operation state that suppresses the movement of the fall prevention plate and a lock release state that releases the suppression; and
A driving mechanism having a driving plate having a predetermined structure for changing the state of the lock block in an end region of the driving range, and driving the driving plate in the advancing and retreating direction of the falling preventing plate. And
Equipped with a,
The driving plate has a cam portion having an inclined cam surface at an end,
The lock block is pressed toward the cam surface by an urging member, and the state transition is performed in the end region by operating along the cam surface.
Platform fall prevention device. A platform fall prevention device for projecting a fall prevention plate when getting on and off to block a gap between the platform and a stopped train,
A lock block having a mark at a predetermined position, and a state transition to a lock operation state for inhibiting the movement of the fall prevention plate and a lock release state for releasing the inhibition;
A driving mechanism having a driving plate having a predetermined structure for changing the state of the lock block in an end region of the driving range, and driving the driving plate in the advancing and retreating direction of the falling preventing plate. And
A confirmation window capable of confirming whether or not the mark is displayed, or whether or not the lock block is in the lock operation state based on the display position of the mark;
Fall prevention device for platforms with The drive mechanism portion is not engaged in the end region, but is engaged and driven when the driving plate moves in the forward / backward direction beyond the end region, and the driven plate moves the fall prevention plate back and forth. Having
The platform fall prevention device according to claim 1 or 2 . The lock block inhibits movement of the fall prevention plate by inhibiting movement of the driven plate.
The platform fall prevention device according to claim 3 . The lock block operates in a direction crossing the advance / retreat direction, and the state transition is performed with the position where the follower plate is prevented from moving in the advance / retreat direction as the lock operating state and the position where the inhibition is released as the unlock state. To
The platform fall prevention device according to claim 4 .

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