JP5475164B1 - Platform fall prevention device - Google Patents

Abstract

A platform fall-preventing device that does not require electric power for activation / deactivation state transition is realized. Make the amount of protrusion of multiple fall prevention plates variable.
An end face of a driving plate 30 also serves as a cam portion, and when the driving plate 30 moves in the forward / backward direction, lock blocks 52R and 52L appear / retreat in an advanceable manner in the forward direction of the driven plate 40. . Each fall prevention plate 16 (16a, 16b) is provided with a second step engagement portion 162 (162a, 162b), and the main frame 14 is forward of the projection direction of each second step engagement portion. A fall-preventing plate track-side stopper 146 (146a, 146b) is provided so as to protrude in a fixed position. The amount of protrusion of each fall prevention plate 16 (16a, 16b) can be varied by adjusting the fixed position of the corresponding fall prevention plate track side stopper 146 (146a, 146b).
[Selection] Figure 21

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 stores 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, and falling passengers (See, for example, Patent Document 1 and Patent Document 2).

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

  Conventional platform fall prevention devices generally have a configuration in which one device moves one fall prevention plate. For example, when attention is paid to the platform in a curved section, the platform edge is curved. On the other hand, the edge of the train entrance / exit is a straight line. Therefore, the gap between the train entrance and platform and the platform vary widely depending on the location even at the same entrance and exit. As a countermeasure, it is possible to arrange a plurality of platform fall prevention devices for one entrance and exit, and to slightly change the amount of protrusion of the fall prevention plate of each device. There was a problem that it increased significantly.

  In addition, the conventional platform fall prevention device prevents 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 brake 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 change the operation state and the release state Requires power. For this reason, if a power interruption occurs in a state where the fall prevention plate does not reach completion of protrusion or storage, the brake of the electric drive mechanism operates and manual drive cannot be performed. Since the train cannot be operated if the fall prevention plate is protruding or in the middle of storage, the train cannot be operated until the power is restored. In order to avoid such a situation, a backup power source was necessary.

The present invention has been made in view of these circumstances.
A first problem is to realize a platform fall prevention device that can be handled by a single unit even when installed on a platform in a curved section.
In addition, the second problem is to prevent the fall prevention plate from moving due to a reaction force when a passenger gets on the fall prevention plate while the fall prevention plate projects 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 does not require electric power for the state transition of release.
A third problem is to realize a platform anti-falling device capable of storing the anti-falling plate by manual drive even when there is no backup power source when the power is cut off.

The first invention for solving the above-described problems is that the first and second fall prevention plates (for example, the fall prevention plates 16 and 16a in FIG. 21) protrude when the passenger gets on and off the platform and the train that is stopped. A platform fall prevention device for closing a gap,
A drive unit (for example, the drive mechanism unit 20 in FIG. 1, the drive pulley 21 in FIG. 3, the driven pulley 22, the timing belt 23, and the motor 24) that generates a drive force for driving the fall prevention plate in the forward / backward direction. )When,
A first follower plate provided corresponding to the first fall prevention plate and moving in the forward and backward direction by the driving force;
A second follower plate (for example, the sub follower plate 80a in FIG. 21) provided corresponding to the second fall prevention plate (for example, the fall prevention plate 16a in FIG. 21);
A connecting portion (for example, connecting rod 70 in FIGS. 3 and 21) that connects the first driven plate and the second driven plate;
The first follower plate engages with a first engaged portion (for example, the first step engagement portion 162 in FIG. 3) of the first fall prevention plate during the movement and moves the first follower plate. A first engagement portion (e.g., an adjustment stopper 48 in FIG. 3) that moves the fall prevention plate in the forward / backward direction so that the position can be adjusted in the forward / backward direction,
When the second driven plate moves with the connected first driven plate, the second engaged portion of the second fall prevention plate (for example, the first step engaging portion of FIG. 9). 162a), and has a second engagement portion (for example, an adjustment stopper 88 in FIG. 9) that moves the second fall prevention plate in the forward / backward direction so that the position thereof can be adjusted in the forward / backward direction,
The platform fall prevention device is capable of adjusting the movement ranges of the first and second fall prevention plates by adjusting the positions of the first and second engagement portions.

  According to a second aspect of the present invention, the first engaging portion includes a first storing movement engaging portion (for example, the fixed stopper 46 in FIG. 3) provided at a fixed position of the first driven plate, A first protrusion-moving engagement portion (for example, the adjustment stopper 48 in FIG. 3) provided so as to be position-adjustable in the advancing / retreating direction so as to sandwich the first engaged portion; The engaging portion is provided with a second storing-moving engaging portion (for example, a fixed stopper 86 in FIG. 9) provided at a fixed position of the second driven plate so that the position of the engaging portion can be adjusted in the forward / backward direction. A platform fall prevention device according to the first aspect of the present invention, further comprising a second projecting engagement portion (for example, the adjustment stopper 88 of FIG. 9) so as to sandwich the second engaged portion.

  According to a third aspect of the present invention, the first fall prevention plate has a first stopper portion (for example, the second step engagement portion 164 in FIG. 3) provided at a fixed position, and the second fall prevention plate The prevention plate has a second stopper portion (for example, the second step engagement portion 164a in FIG. 9) provided at a fixed position, and the first stopper portion comes into contact with the first stopper portion. The first stopper portion (for example, the fall prevention plate track side stopper 146 in FIG. 3) that restricts the movement in the protruding direction (the track direction in FIG. 3) beyond the movement range of the fall prevention plate is provided in the first stop. It is possible to change the position in accordance with the position adjustment range of the engaging portion, and the movement of the second fall prevention plate in the protruding direction beyond the moving range is regulated by the second stopper portion contacting. The second stopper portion (for example, the rail-side stopper 14 for the fall prevention plate in FIG. 9) The a), wherein with the repositionable in accordance with the position adjustment range of the second engaging portion, a fall prevention device for a platform of the first or second aspect of the present invention.

In a fourth aspect of the present invention, there is provided a lock operating state for suppressing movement of a first driven plate (for example, the driven plate 40 in FIG. 21) for moving the first fall prevention plate, and an unlocked state for releasing the suppression. And a cam portion (for example, a slope block 51c in FIG. 5) at an end thereof (for example, a track side lock block 52K and a home side lock block 52H in FIG. 21) and an inclined cam surface (for example, slope 51c in FIG. 5). And a driving plate (for example, the driving plate 30 of FIG. 21) having a predetermined structure for changing the state of the lock block in the end region of the driving range.
The drive unit drives the driving plate in the forward / backward direction,
The first driven plate does not engage with the driving plate in the end region, and engages and follows when the driving plate moves in the forward / backward direction beyond the end region,
The lock block is pressed toward the cam surface by an urging member (for example, the coil spring 59 in FIG. 3), and the state transition is performed in the end region by operating along the cam surface. The platform fall prevention device according to any one of the first to third inventions.

  The fifth invention is the platform fall prevention device according to any one of the first to fourth 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.

  According to the first aspect of the present invention, the first and second engaged portions of the first and second fall prevention plates are engaged with the engaged portions (first engaged portion, second engaged portion). By making the position of the engaging portion of the driven plate adjustable, the relative position of the driven plate and the fall preventing plate in the advancing / retreating direction can be varied for each fall preventing plate. Even if the platform is in a curved section, if the amount of protrusion of each fall prevention plate is set individually, one platform can be used for the platform curve. A single platform fall prevention device may be installed for a single entrance, and when installing multiple devices at a single entrance / exit as in the past or when incorporating the same drive mechanism in a single vehicle The installation cost is much cheaper than that.

  According to the second aspect of the invention, it is possible to adjust the time when the force for moving in the forward / backward direction from the driven plate to the fall prevention plate is transmitted. Thereby, the protrusion amount of a fall prevention board can be changed.

  According to the third aspect of the present invention, the position where excessive protrusion of the fall prevention plate is restricted can be set variably according to the change in the protrusion amount of the fall prevention plate.

  According to the fourth invention, the driven plate is indirectly moved by engaging with the driving plate moved by the drive unit, and the fall prevention plate is projected / accommodated by moving the driven plate. In the end area of the driving plate, the lock block deters movement of the anti-falling plate as the engagement between the driving plate and the driven plate is released and the anti-falling plate no longer moves in the forward / backward direction. The state transitions between a lock operation state to be released and a lock release state to release the inhibition. That is, a mechanism is formed in which the lock is automatically activated as the fall prevention plate is in a protruding state or a housed state. Even if a passenger getting on and off the train steps on the fall prevention plate and a reaction force occurs in the moving direction of the fall prevention plate, the fall prevention plate does not move. Further, since the state transition of the lock block is realized in a driven and mechanical manner with the movement of the driving plate, it is not necessary to provide a separate power source for releasing / operating the lock as in the prior art. Furthermore, since the number of drive parts is reduced as compared with the conventional case, not only the effect of reducing the manufacturing cost and weight but also the effect of reducing the failure frequency can be obtained.

  According to the fifth aspect of the invention, the driving mechanism that moves the driving plate and the fall prevention plate can be driven by the handwheel. Therefore, it is possible to manually move the apparatus when the power is cut off, and it is not necessary to prepare a special controller or a standby power source prepared for an accident or when the power is turned off as in the prior art. In addition, since the conventional platform fall prevention device is configured to move one fall prevention plate, when manually driven, personnel corresponding to each fall prevention plate are arranged separately. Had to be driven manually. In other words, there was one fall prevention plate corresponding to one manual drive port. On the other hand, according to the fifth aspect of the present invention, the plurality of fall prevention plates can be moved at a time via the first driven plate and the second driven plate by manual driving with one manual driving port. it can. That is, there are a plurality of fall prevention plates corresponding to one manual drive port.

The top view of the fall prevention apparatus for platforms in the installation state. Sectional drawing of the same apparatus in the AA cross section of FIG. The perspective top view which shows the internal structure of a main unit. The side view which looked at the main unit from the track side. The figure which shows the structural example of a drive plate. The figure which shows the structural example of a driven plate. Enlarged view around the driven plate. The figure which shows the structural example of a lock block. The top view of a sub A unit. The side view which looked at the sub A unit from the track side. The enlarged view around a sub-A unit. The figure which shows the structural example of a sub driven board. The figure which shows the state from which the force for moving to a track | orbit direction is transmitted from a drive plate to a driven plate among the operation | movement of a main unit, and the state by which the lock mechanism part was cancelled | released. The figure which shows the state from which the force for moving to a track | orbit direction is transmitted to a fall prevention board from a driven board among operation | movement of a main unit. The figure which shows the state which the movement regulation of the follower plate and the fall prevention plate acted in the operation | movement of a main unit, and the state which the lock mechanism part act | operated. The figure which shows the state which the movement of the fall prevention board was completed among operation | movement of a main unit. The figure which shows the state from which the force for moving to a home direction is transmitted from a drive plate to a driven plate among the operation | movement of a main unit, and the state by which the lock mechanism part was cancelled | released. The figure which shows the state from which the force for moving to a home direction is transmitted to a fall prevention board from a driven board among operation | movement of a main unit. The figure which shows the state which adjusted the protrusion amount of the fall prevention board small rather than the state of FIG. The figure which shows the state which protruded the fall prevention board in the adjustment state of FIG. The figure which shows a storage completion state among operation | movement of the fall prevention apparatus for platforms. The figure which shows the state which the driven plate of the main unit started the drive to a track direction (protrusion direction) among operation | movement of the fall prevention apparatus for platforms. The figure which shows the state which the fall prevention board started following in the track | orbit direction (protrusion direction) in sub B unit among operation | movement of the platform fall prevention apparatus. The figure which shows the state which the fall prevention board started following in the track | orbit direction (projection direction) in the main unit among operation | movement of the fall prevention apparatus for platforms. The figure which shows the state which the fall prevention board started following to the track | orbit direction (protrusion direction) in sub A unit among operation | movement of the fall prevention apparatus for platforms. The figure which shows the state in which the movement control to the protrusion direction of each fall prevention plate is acting among operation | movement of the fall prevention apparatus for platforms. The figure which shows the state which the driven plate of the main unit started the drive to a home direction (storage direction) among operation | movement of the fall prevention apparatus for platforms. The figure which shows the state in which each fall prevention plate of the main unit and sub B unit is driven to a home direction (storage direction) among operation | movement of the fall prevention apparatus for platforms. The figure which shows the state which each fall prevention plate of a main unit, a sub B unit, and a sub A unit is driven to a home direction (storage direction) among operation | movement of the platform fall prevention apparatus. The figure which shows the example of a handwheel handle and its attachment structure.

An embodiment of a platform fall prevention device to which the present invention is applied will be described.
FIG. 1 is a top view of the platform fall prevention device 10 in an installed state. FIG. 2 is a cross-sectional view of the same device taken along the line AA of FIG.

  The platform fall prevention device 10 of the present embodiment is a three-unit fall prevention device including a main unit 11U and sub-A units 11a and B units 11b provided on both sides of the unit in the longitudinal direction of the platform. is there. The platform fall-preventing device 10 is fitted and fixed in an installation space 3 that is recessed at the upper end of the line side of the platform 2 of the station (FIG. 2).

  The platform fall prevention device 10 has a main frame 14 fixed to the installation space 3 and detachable top plates 12, 12a, 12b that contact the lids thereof, and these are thin rectangular internal spaces that open to the track side. Is defined. Then, in the internal space, the linear movement mechanism 18 that supports the fall prevention plate 16 of the main unit 11U so as to be slidable in the advancing / retreating direction of “home to track” substantially horizontally, and the fall prevention plate 16 are moved in the advance / retreat direction. The drive mechanism part 20 for this is incorporated.

  The fall prevention plates 16, 16a, 16b are also called steps. Outside of getting on and off, the fall prevention plates 16, 16a, 16b are housed in the internal space of each unit so that the track side end (projection side end) does not protrude to the track side (track side). . At this time, the lock mechanism unit 50 enters a lock operation state, and suppresses the movement of the fall prevention plates 16, 16a, 16b by suppressing the movement of the driven plate 40 and the sub driven plates 80a, 80b (see FIG. 21). This state is referred to as a “storing completion state”.

  And when getting on and off the train, as the drive mechanism unit 20 is operated, the lock mechanism unit 50 is changed to the unlocked state, and the fall prevention plates 16, 16a, 16b are projected to the track side, and the platform, the train, Narrow the gap to prevent falling. This state is called a “projection completion state”. When in the “projection completion state”, the lock mechanism 50 automatically changes to the lock operation state. The movement of the fall-preventing plate 16b is restrained and is maintained in the protruding completion state by the lock mechanism 50. 1 and 2 show this “projection completion state”.

  When the boarding / exit is completed, the drive mechanism unit 20 reverses and the lock mechanism unit 50 changes to the unlocked state. When the fall prevention plates 16, 16 a, 16 b move in the home direction (storage direction) and enter the “storage completion state”, the lock mechanism unit 50 automatically transitions to the lock operation state again. The fall prevention plate 16 returns to the storage completion state and is locked in that state.

  That is, the lock mechanism unit 50 according to the present embodiment automatically changes to the lock operation state when the drive mechanism unit 20 is in the storage completion state / projection completion state, and input from the fall prevention plates 16, 16a, 16b side. The lock operation state can be maintained against (for example, reaction force generated when a passenger gets into the fall prevention plates 16, 16a, 16b and tries to get in). On the other hand, the lock mechanism 50 follows the normal operation of the fall prevention plates 16, 16a, 16b starting from the operation of the drive mechanism 20, and can automatically change to the unlocked state. No power is required to unlock.

  And the platform fall prevention apparatus 10 of this embodiment can set each protrusion amount (stroke amount) of the fall prevention plates 16, 16a, 16b.

[Description of drive mechanism]
Next, the configuration of the drive mechanism unit 20 will be described in detail.
3 and 4 are views showing the internal structure of the main unit 11U. FIG. 3 corresponds to a top view of the top plate 12 and the fall prevention plate 16 shown in FIG. 1, and FIG. 4 is a view from the track side. It corresponds to the side view. Since the linear motion mechanism 18 can use a known technique as appropriate, the description thereof is omitted. Moreover, both figures show the “storing completion state”.

  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 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.

  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 rotate manually. To do. 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.

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

FIG. 5 is a diagram 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, that is, the left side of FIG. 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 carved on the lower surface of the main portion 31, and a connection extending from the main portion 31 toward the timing belt 23. Arm 34.

  The guide groove 33 is slidably fitted to the lower surface of the main portion 31 with a guide rail 32 (FIG. 4) fixed to the bottom surface of the main frame 14, and guides the driving plate 30 along the advancing / retreating direction of the fall prevention plate. . 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 linearly along the advancing / retreating direction of the fall prevention plate.

FIG. 6 is a (1) top view and (2) BB sectional view of the driven plate 40.
On the lower surface of the main plate 41 of the driven plate 40, a pair of home side engaging pieces 42 and track side engaging pieces 44 arranged along the advancing and retreating direction of the fall prevention plate are provided. The installation interval L1 between the home-side engagement piece 42 and the track-side engagement piece 44 is set to be larger than the width W of the connecting arm 34 of the driving plate 30 (width in the advancing and retreating direction of the fall prevention plate: FIG. 5). .

Further, on the upper surface of the main plate 41 of the driven plate 40, a pair of fixed stoppers 46 and an adjustment stopper 48 arranged along the advancing and retreating direction of the fall prevention plate 16 are provided.
A screw hole 45 is provided on the upper surface of the fixed stopper 46.
The adjustment stopper 48 is fixed to a long hole 47 provided in the main plate 41 along the advancing / retreating direction of the fall prevention plate with a bolt 49. That is, the adjustment stopper 48 is attached in the direction of the long hole 47 so that the fixed position is variable. The attachment position of the adjustment stopper 48 is determined by the desired stroke amount of the fall prevention plate 16.

  Then, as shown in FIG. 7, the driven plate 40 is configured such that the home side engaging piece 42 and the track side engaging piece 44 sandwich the connecting arm 34 along the advancing and retreating direction of the fall prevention plate. Combined on top of each other. 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 (= L1-W). .

  Since the projecting lengths of the home side engaging piece 42 and the track side engaging piece 44 are set so as to reach the side surface of the connecting arm 34, the driving plate 30 moves linearly along the advancing and retreating 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 transmits a force for movement.

  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. This margin length L2, in other words, the time difference between the start of movement of the driving plate 30 and the start of movement of the driven plate 40 is an important factor 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 and backward directions.

Incidentally, a follower plate track side stopper 142 (FIG. 3) is erected from the bottom surface of the main frame 14 on the moving path track side of the follower plate 40, and the side surface of the follower plate 40 on the track side hits this. The movement in the above trajectory direction is restricted. That is, the movement limit position of the driven plate 40 in the track direction is set by the driven plate track side stopper 142.
Further, a driven plate home-side stopper 144 (FIG. 3) is erected from the bottom surface of the main frame 14 on the moving path home side of the driven plate 40, and the side surface on the home side of the driven plate 40 hits this. Further movement in the storage direction is restricted. That is, the movement limit position of the driven plate 40 in the home direction is set by the driven plate home-side stopper 144.

On the other hand, the fall prevention plate 16 is disposed on the driven plate 40.
As shown in FIG. 3, a first step engagement portion 162 and a second step engagement portion 164 project downward from the lower surface of the fall prevention plate 16. The first step engagement portion 162 is assembled so as to be positioned between the fixed stopper 46 and the adjustment stopper 48. The second step engaging portion 164 includes a fall prevention plate track side stopper 146 and a fall prevention that are arranged to face the bottom surface of the main frame 14 in the advancing / retreating direction (protrusion / storage direction) of the fall prevention plate 16. The plate is assembled so as to be positioned between the plate home side stopper 148.

  The fall-preventing plate track side stopper 146 is attached to a fixed position. In the present embodiment, bolts 149 are attached to the long holes 147 opened in the bottom surface of the main frame 14 along the advancing / retreating direction of the fall prevention plate 16. The fixed position of the fall-preventing plate track side stopper 146 is determined according to a desired protrusion amount (stroke amount) of the fall-preventing plate 16.

When the fall prevention plate 16 moves in the track direction (protruding direction) together with the driven plate 40, the second step engaging portion 164 eventually comes into contact with the side surface on the home side of the fall prevention plate track side stopper 146, and more tracks. Movement in the direction is restricted. That is, the protrusion limit position of the fall prevention plate 16 is set by the fall stop plate raceway side stopper 146.
On the contrary, when the fall prevention plate 16 moves to the home side together with the driven plate 40, the second step engaging portion 164 eventually comes into contact with the side surface of the fall prevention plate home side stopper 148, and the fall prevention plate 16 No more moving in the home direction. That is, the storage limit position of the fall prevention plate 16 is set by the fall prevention plate home side stopper 148.

[Description of locking mechanism]
Next, the configuration of the lock mechanism unit 50 will be described.
As shown in FIG. 3, 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 (see FIG. 5) provided on the driving plate 30, and two home side lock blocks 52H and a track side lock block 52K following the cam portion 51. The home-side lock block 52H and the track-side lock block 52K are rod-shaped cam followers that engage with the cam portion 51, and are erected on the main frame 14 along a direction perpendicular to the advancing / retreating direction of the fall prevention plate 16. It arrange | positions between a pair of block guide 53 made.

The cam portion 51 (see FIG. 5) has a predetermined structure for causing the home-side lock block 52H and the track-side lock block 52K to change state in the end region of the driving range of the driving plate 30, and the side surface of the main portion 31 of the driving plate 30. Configured using.
Specifically, the side of the driving plate 30 opposite to the timing belt 23 (upper side in FIG. 3) functions as a cam surface. The difference in distance from the guide rail 32 to the side surface determines the cam profile. As shown in FIG. 5, the cam profile of the present embodiment has a high lift area 51 b at the center of the main portion 31, and both end portions in the advancing and retreating direction of the main portion 31 (in other words, both ends of the driving range of the driving plate 30. Part) has a low lift area 51a. These lift areas are connected by an inclined slope 51c. At both ends, the total width (length in the advancing / retreating direction) of the low lift region 51a and the slope 51c is set to have at least a margin length L2 (see FIG. 7).

  FIG. 8 is a diagram illustrating a configuration example of the home-side lock block 52H and the track-side lock block 52K. (1) Top view of home-side lock block 52H, (2) Side view of the lock block viewed from the home side, (3) Top view of the track-side lock block 52K, (4) View of the lock block from the home side It corresponds to each side view.

  The home-side lock block 52H and the track-side lock block 52K have a cantilevered roller 56 on the back side (on the right side in FIGS. 8 (2) and (4)) of one end (lower side in FIG. 8). Pivot at.

  Further, the home-side lock block 52H and the track-side lock block 52K include a guide pin 58 erected on the side surface of the other end (upper side in FIG. 8) opposite to the driving plate 30, and a coil spring 59. Prepare. One end (lower end in FIG. 8) of the guide pin 58 is fixed to the lock block 52, and the other end (upper end in FIG. 8) is a guide hole 61 of the guide pin support portion 60 erected from the bottom surface of the main frame 14. (See FIG. 3). The coil spring 59 is provided between the guide pin support portion 60 fixed to the frame 14 and the lock block, and the guide pin 58 is inserted inside the coil.

  Accordingly, the home-side lock block 52H and the track-side lock block 52K are guided by the block guide 53 and the guide pin 58, and are slidable along the bottom surface of the main frame 14 in a direction perpendicular to the advancing and retreating direction of the fall prevention plate 16. The coil spring 59 is always biased toward the driving plate 30 while being supported by the coil spring 59. The corners of the end portions of the home side lock block 52H and the track side lock block 52K are chamfered around the axis of the roller 56 at substantially the same angle as the slope 51c of the cam portion 51.

  The states of the home-side lock block 52H and the track-side lock block 52K are detected by the home-side side surface, the home-side limit switch 66H and the track-side limit switch 66K (FIG. 3) provided on the track-side side surface. These switches are realized by, for example, push-in switches.

As shown in FIG. 8, step-shaped portions 55 are respectively provided on the home side surface of the home side lock block 52 </ b> H and the side surface of the track side lock block 52 </ b> K on the track side. The step-shaped portion 55 is provided at a position that passes in front of the limit switch while the home-side lock block 52H and the track-side lock block 52K follow the cam portion 51 and changes from the lock operation state to the lock release state. Yes.
Accordingly, it is possible to detect whether the home side lock block 52H and the track side lock block 52K are in the lock operation state or the lock release state depending on whether or not the home side limit switch 66H and the track side limit switch 66K are pushed. it can.

  Here, an important dimensional relationship will be described. The vertical thickness of the home-side lock block 52H and the track-side lock block 52K is set to be larger than the vertical thickness of the driving plate 30. Describing with reference to the bottom surface of the main frame 14, the height H (see FIG. 8) to the upper end on the one end side where the rollers 56 of the home side lock block 52H and the track side lock block 52K are cantilevered is determined as the driving force. The upper end height Hg of the plate 30 (see FIG. 5) is set to be greater.

[Description of connecting structure]
Returning to FIG. 7, the connecting rod 70 is fixed to the fixing stopper 46 of the driven plate 40. For example, the bolt 75 is fixed to the screw hole 45 (see FIG. 6).
The connecting rod 70 passes between the fall prevention plate 16 and the driven plate 40, one end from the main unit 11U to the sub A unit 11a, and the other end from the main unit 11U to the sub B unit 11b. Then, the movement of the driven plate 40 is transmitted to the sub A unit 11a and the sub B unit 11b.

[Subunit configuration]
Next, the structure of the sub A unit 11a will be described. The sub B unit 11b is bilaterally symmetric with the sub A unit 11a, and the description thereof is omitted.

FIG. 9 is a top view of the sub A unit 11a. FIG. 10 is a side view of the unit as viewed from the track side.
The sub A unit 11a supports the fall prevention plate 16a by the linear motion mechanism 18 at the same height as the fall prevention plate 16 of the main unit 11U so as to be slidable in the forward and backward directions. Further, a guide rail 72a is provided on the bottom surface of the main frame 14 of the sub A unit 11a along the forward / backward direction of the fall prevention plate 16a.

  FIG. 11 is (1) an enlarged top view and (2) a side view around the sub driven plate 80a. A sub driven plate 80a is placed on the guide rail 72a so as to be slidably guided. The connecting rod 70 extending from the main unit 11U passes through the bottom surface of the main frame 14 and the middle of the fall prevention plate 16a to reach the sub A unit 11a. The tip is connected to the sub driven plate 80a.

FIG. 12 is a diagram illustrating a configuration example of the sub driven plate 80a, which corresponds to (1) a top view, (2) a CC cross-sectional view, and (3) a side view as viewed from the home side.
The configuration of the sub driven plate 80a is similar to the configuration of the driven plate 40.
A guide groove 83 is provided on the lower surface of the main plate 81 of the sub driven plate 80a so as to be slidably fitted to the guide rail 72a along the advancing and retreating direction of the fall prevention plate.
Further, the upper surface of the main plate 81 has a pair of stoppers arranged along the advancing / retreating direction of the fall prevention plate 16. The track side is a fixed stopper 86 and the home side is an adjustment stopper 88.

A screw hole 85 for tightening a bolt 75 for fixing the connecting rod 70 is provided on the upper surface of the fixing stopper 86.
The adjustment stopper 88 is fixed to a long hole 87 provided in the main plate 81 along the advancing / retreating direction of the fall prevention plate 16 with a bolt 89. That is, the adjustment stopper 88 is attached in the direction of the long hole 87 so that the fixed position is variable. The attachment position of the adjustment stopper 88 is determined by the protruding amount of the fall prevention plate 16a in the desired sub A unit 11a.

  As shown in FIGS. 9 and 11, a fall prevention plate 16a is disposed on the sub driven plate 80a of the sub A unit 11a. And as shown in FIG. 10, the 1st step engagement part 162a and the 2nd step engagement part 164a are protrudingly provided by the lower surface of the fall prevention board 16a toward the downward direction. The first step engagement portion 162a is assembled so as to be positioned between the fixed stopper 86 and the adjustment stopper 88 of the sub A unit 11a (see FIG. 9). The second step engagement portion 164a and a fall prevention plate track side stopper 146a arranged to face the bottom surface of the main frame 14 in the advancing / retreating direction (protruding / storing direction) of the fall prevention plate 16a and the fall prevention. It is assembled so that it may be located between the board | substrate home side stoppers 148a (refer FIG. 9).

  As shown in FIGS. 9 and 10, the fall-preventing plate track side stopper 146 a is attached in a variable fixed position. In the present embodiment, the bolts 149a are attached to the long holes 147a opened in the bottom surface of the main frame 14 along the advancing / retreating direction of the fall prevention plate 16a. The fixed position of the track-side stopper 146a for the fall prevention plate is determined according to the desired protrusion amount (stroke amount) of the fall prevention plate 16a.

When the fall prevention plate 16a moves to the track side together with the sub driven plate 80a, the second step engaging portion 164a eventually comes into contact with the side surface on the home side of the fall prevention plate raceway side stopper 146a, and further to the track direction. Movement is restricted. That is, the protrusion limit position of the fall prevention plate 16a is set by the fall-prevention plate track side stopper 146a.
On the contrary, when the fall prevention plate 16a moves to the home side together with the sub driven plate 80a, the second step engagement portion 164a eventually comes into contact with the side surface on the track side of the fall prevention plate home side stopper 148a, and the fall prevention plate 16a. Can no longer move in the home direction. That is, the movement limit position in the storing direction of the fall prevention plate 16a is set by the fall prevention plate home side stopper 148a.

[Description of operation]
Next, in describing the operation of the platform fall prevention device 10, the operation of the main unit 11U will be described first.

First, an operation of projecting the fall prevention plate 16 from the storage completion state will be described with reference to FIGS. 3 and 13 to 16.
FIG. 3 shows a “storing completed state” in which the fall prevention plate 16 is stored in the main frame 14 in the home side as described above. In this state, the connecting arm 34 of the driving plate 30 is in contact with the home side engaging piece 42 of the driven plate 40, and the driven plate 40 is in contact with the driven plate home side stopper 144 and stopped. Further, the first step engaging portion 162 of the fall prevention plate 16 is in contact with the fixed stopper 46 of the driven plate 40. The second step engagement portion 164 which is another engagement portion of the fall prevention plate 16 is in contact with the fall prevention plate home side stopper 148.

  If attention is paid to the lock mechanism portion 50, the roller 56 of the track side lock block 52K is in the low lift region 51a at the left end of the cam portion 51, and the home side lock block 52H is in the high lift region 51b of the cam portion 51. . That is, the track side lock block 52K is in a locked state. Therefore, the track side limit switch 66K is turned on, and the home side limit switch 66H is turned off.

  In this state, the track side lock block 52K is inserted into the track side of the driven plate 40. Therefore, even if the follower plate 40 tries to move in the track direction, the corner of the follower plate 40 near the lock block cannot hit the track side lock block 52K. As a result, even if the fall prevention plate 16 comes out on the track side, the first step engagement portion 162 hits the fixed stopper 46 of the driven plate 40 and cannot move to the track side. That is, the fall prevention plate 16 is in a locked state.

Next, the process of changing from FIG. 3 to FIG. 13 will be described.
When the motor 24 is driven counterclockwise, the timing belt 23 on the side where the driving plate 30 is engaged moves in the track direction (projection direction). Accordingly, when the driving plate 30 starts moving in the track direction (projection direction), the connecting arm 34 is separated from the home side engaging piece 42. At this stage, the follower plate 40 still does not move.

  Here, when turning to the lock mechanism 50, the driving plate 30 moves in the track direction, whereby the roller 56 of the track-side lock block 52K climbs the slope 51c from the low lift region 51a and reaches the high lift region 51b. The process in which the roller 56 climbs the slope 51c corresponds to the removal of the lock block that has been inserted in the forward direction of the driven plate 40. Therefore, the lock is released. Even at this stage, the follower plate 40 still does not move.

  If the driving plate 30 continues to move in the track direction, the state shown in FIG. 13 is reached. The connecting arm 34 of the driving plate 30 hits the track-side engagement piece 44, and thereafter, a force for moving in the track direction is transmitted to the driven plate 40 via the driving plate 30, and the driven plate 40 is driven to move with the driving plate 30. Moves in the direction of the orbit. At this stage, the fall prevention plate 16 does not move.

  When the motor 24 is further driven, the driving plate 30 and the driven plate 40 are further moved in the track direction. Then, as shown in FIG. 14, the fixed stopper 46 is eventually separated from the first step engaging portion 162 of the fall prevention plate 16 and the adjustment stopper 48 is approached instead. When the adjustment stopper 48 hits the first step engagement portion 162, a force for moving the driven plate 40 in the track direction is transmitted to the fall prevention plate 16. Thereafter, the fall prevention plate 16 follows, and moves together with the driving plate 30 and the driven plate 40 in the track direction. As a matter of course, the second step engagement portion 164 of the fall prevention plate 16 is separated from the fall prevention plate home side stopper 148 and approaches the fall prevention plate raceway side stopper 146.

  The integral movement of the driving plate 30, the driven plate 40, and the fall prevention plate 16 continues until the state shown in FIG. When this state is reached, the track-side side surface of the driven plate 40 hits the track-side stopper 142 for the driven plate projecting from the main frame 14 and cannot move further in the track direction. In addition, since the fixing position of the fall-preventing plate track-side stopper 146 is appropriately adjusted, the second fall-preventing plate 16 of the second fall-preventing plate 16 is almost at the same timing as when the driven plate 40 hits the follower plate track-side stopper 142. The step engaging portion 164 hits or comes close to a position close to the fall-preventing plate track side stopper 146.

  Even if the fall prevention plate 16 tries to move further in the track direction, the second step engaging portion 164 hits the fall prevention plate track side stopper 146 and cannot move. That is, the protrusion beyond the design of the fall prevention plate 16 is limited. Therefore, if the lock mechanism of the lock mechanism unit 50 is ignored, the fall prevention plate 16 may move for some reason outside the range in which the fall prevention plate 16 is moved based on the driving force of the motor 24. Even if there is, the range is limited between the fall prevention plate raceway side stopper 146 and the fall prevention plate home side stopper 148, and the fall prevention plate 16 does not move beyond this range.

  Here, the description will be given focusing on the lock mechanism unit 50. When the state of FIG. 15 is reached, the roller 56 of the home-side lock block 52H descends the slope 51c from the high lift area 51b of the cam portion 51 and reaches the low lift area 51a. The process in which the roller 56 descends the slope 51c corresponds to the lock block being inserted into the home side of the driven plate 40 and the lock being activated. That the home side lock block 52H is in the lock operating state is detected by turning on the home side limit switch 66H. Then, as shown in FIG. 16, the operation of the motor 24 is stopped, and a “projection completion state” in which the fall prevention plate 16 projects to the track side is obtained.

  Next, consider the case where the fall prevention plate 16 is about to move to the home side in the protruding completion state. When the fall prevention plate 16 tries to move to the home side, the first step engagement portion 162 pushes the adjustment stopper 48 of the driven plate 40 in the home direction. However, the corner near the lock mechanism 50 at the right end of the follower plate 40 abuts on the home-side lock block 52H in the lock operation state and cannot move. Therefore, in the protrusion completion state, the fall prevention plate 16 is in a state where movement is restricted to the track side and the home side, that is, a locked state.

Next, with reference to FIGS. 16-18, the operation | movement which accommodates the fall prevention board 16 from a protrusion completion state is demonstrated.
When the motor 24 is driven clockwise from the protrusion completion state of FIG. 16, the portion of the timing belt 23 on the driving plate side moves in the home direction (storage direction). The connected driving plates 30 also start moving in the home direction (storage direction). The connecting arm 34 moves away from the track-side engagement piece 44 of the driven plate 40 and moves toward the home-side engagement piece 42. Eventually, both come into contact with each other as shown in FIG. 17, and a force for moving in the home direction is transmitted from the driving plate 30 to the driven plate 40. Thereafter, the driving plate 30 and the driven plate 40 move together in the home direction. At this stage, the fall prevention plate 16 has not moved yet.

  On the other hand, in the lock mechanism unit 50, the roller 56 of the home side lock block 52H moves up the slope 51c from the low lift region 51a of the cam unit 51, reaches the high lift region 51b, and is unlocked. That the home side lock block 52H is in the unlocked state is detected by turning off the home side limit switch 66H.

  When the driving plate 30 and the driven plate 40 start moving integrally to the home side from the state of FIG. 17, the adjustment stopper 48 is relatively separated from the first step engagement portion 162 of the fall prevention plate 16, instead. The fixed stopper 46 approaches the first step engaging portion 162. Eventually, as shown in FIG. 18, the fixed stopper 46 hits the first step engagement portion 162, and the force for moving in the home direction is transmitted from the driven plate 40 to the fall prevention plate 16. Thereafter, the driving plate 30, the driven plate 40, and the fall prevention plate 16 integrally move to the home side (storage direction).

  When the driving plate 30, the driven plate 40, and the fall prevention plate 16 further move toward the home side, the state changes from FIG. 18 to the state shown in FIG. In this process, the second step engaging portion 164 of the fall prevention plate 16 moves away from the fall prevention plate raceway side stopper 146, approaches the fall prevention plate home side stopper 148, and finally comes into contact therewith. Thereafter, the fall prevention plate 16 can no longer move in the home direction. That is, it is stopped at the storage completion position. At substantially the same time, the home side end portion of the driven plate 40 comes into contact with the driven plate home side stopper 144 and cannot move further to the home side.

  Further, in the lock mechanism 50, the roller 56 of the track-side lock block 52K goes down the slope 51c from the high lift area 51b to the low lift area 51a. That is, the track side lock block 52K is inserted into the track side of the driven plate 40, and the lock operation state is established. The fact that the track-side lock block 52K is in the lock operation state is detected by turning on the track-side limit switch 66K, and the motor 24 is stopped. The storage is completed as shown in FIG.

[Adjustment of protrusion amount of fall prevention plate]
The protrusion amount (stroke amount) of the fall prevention plate 16 is varied by adjusting the fixing position of the adjustment stopper 48, and accordingly, the fixing position of the fall prevention plate track side stopper 146 is also adjusted.
Specifically, when the top plate 12 (FIGS. 1 and 2) is removed and the fall prevention plate 16 is removed, the driven plate 40 and the fall prevention plate track side stopper 146 are exposed. When the fixing position of the adjustment stopper 48 and the fall prevention plate track side stopper 146 is changed to the home side, the protrusion amount (stroke amount) of the fall prevention plate 16 decreases. On the contrary, if the fixing position of both is changed to the track side, the protrusion amount (stroke amount STu) of the fall prevention plate 16 increases.

  More specifically, in FIG. 19, the fixing positions of the adjustment stopper 48 and the fall prevention plate track side stopper 146 are both changed to the home side as compared with the adjustment state of FIG. Even if the adjustment state (fixed position) is different, the positional relationship of the fall prevention plate 16 with respect to the main frame 14 in the storage completion state of the fall prevention plate 16 does not change.

  When the fall prevention plate 16 is moved in the track direction in the adjusted state (fixed position) in FIG. 19, the projection completion state shown in FIG. 20 is reached. Compared with FIG. 16 in the same protrusion completion state, the difference in protrusion amount (stroke amount STu ′ <STu) of the fall prevention plate 16 is apparent.

[Unit interlock]
Next, with the operation of the main unit 11U described above in mind, the operation of the main unit 11U, the sub-A unit 11a, and the sub-B unit 11b, and the operation as the platform fall prevention device 10 made as a result of the interlocking will be described. To do.
As a premise, it is assumed that the protrusion amount of the fall prevention plate of each unit is set to satisfy the relationship of sub B unit <main unit <sub A unit. Specifically, the fixing position of the adjustment stopper 88a of the sub driven plate 80a of the sub A unit 11a is closer to the home side than the fixing position of the adjustment stopper 88b of the sub driven plate 80b of the sub B unit 11b of the same type. It has been adjusted.

  FIG. 21 is a diagram illustrating a state of the internal structure of the platform fall prevention device 10 in the storage completion state. The driven plate 40 of the main unit 11U, the sub driven plate 80a of the sub A unit 11a, and the driven plate 80b of the sub B unit 11b are integrally connected by a connecting rod 70.

  As shown in FIG. 22, when the motor 24 is driven counterclockwise, in the main unit 11U, the driving plate 30 contacts the driven plate 40, and the driven plate 40 starts moving in the track direction (projection direction) (FIG. 22). 13). Accordingly, the sub driven plates 80a and 80b connected by the connecting rod 70 also start moving in the track direction (projection direction). At the time when the driven plate 40 starts to move, any of the fall prevention plate 16 of the main unit 11U, the fall prevention plate 16a of the sub A unit 11a, and the fall prevention plate 16b of the sub B unit 11b has started to move. Absent.

  As shown in FIG. 23, as the movement in the orbit direction proceeds, first, the adjustment stopper 88b of the sub driven plate 80b of the sub B unit 11b approaches and comes into contact with the first step engagement portion 162b of the fall prevention plate 16b. . Thereby, the force to move in the track direction is transmitted to the fall prevention plate 16b of the sub B unit 11b via the driven plate 40, the interlocking rod 70, and the sub driven plate 80b. Therefore, thereafter, the fall prevention plate 16b moves integrally with the driven plate 40 and the sub driven plate 80b in the track direction. However, at this time, the fall prevention plate 16 of the main unit 11U and the fall prevention plate 16a of the sub A unit 11a have not yet started moving.

  When the movement in the orbital direction further proceeds, the adjustment stopper 88 of the driven plate 40 hits the first step engaging portion 162 of the fall prevention plate 16 in the main unit 11U as shown in FIG. Thereafter, the fall prevention plate 16 also moves integrally with the driven plate 40 in the track direction (corresponding to FIG. 14).

  When the movement in the orbit direction further proceeds, as shown in FIG. 25, next, in the sub A unit 11a, the adjustment stopper 88a of the sub driven plate 80a approaches the first step engagement portion 162a of the fall prevention plate 16a. Then touch. As a result, the force to move in the orbital direction transmitted in the order of the driven plate 40 → the interlocking rod 70 → the sub driven plate 80a is also transmitted to the fall prevention plate 16a of the sub A unit 11a. Therefore, after that, the fall prevention plate 16b moves integrally with the driven plate 40 and the sub driven plate 80a in the track direction.

  Further, when the movement in the track direction proceeds, as shown in FIG. 26, in the sub-A unit 11a, the second step engagement portion 164a of the fall prevention plate 16a approaches the fall prevention plate track side stopper 146a. In time, it will come into contact. The fall prevention plate 16a can no longer move in the track direction. Thereby, the protrusion amount in the sub A unit 11a has reached the set protrusion amount STa.

  At substantially the same time, in the main unit 11U, the follower plate 40 hits the follower plate track-side stopper 142 and cannot move further in the track direction (corresponding to FIG. 15). Further, the second step engaging portion 164 of the fall prevention plate 16 abuts against the fall prevention plate track side stopper 146, and the fall prevention plate 16 can no longer move in the track direction. Thereby, the protrusion amount in the main unit 11U has reached the set protrusion amount STu.

Also in the sub-B unit 11b, the second step engaging portion 164b of the fall prevention plate 16b contacts the fall prevention plate track side stopper 146b, and the fall prevention plate 16b can no longer move in the track direction. Thereby, the protrusion amount in the sub B unit 11b has reached the set protrusion amount STb.
Therefore, the platform fall prevention device 10 has reached the projecting completion state in which all the fall prevention plates are finished projecting.

  In the projecting completion state, the driven plate 40 of the main unit 11U is restricted from moving toward the home side by the lock mechanism unit 50 as described above. Even if the fall prevention plate 16a tries to move in the home direction for some reason in the sub A unit 11a, the first step engaging portion 162a pushes the adjustment stopper 88a of the sub driven plate 80a, but the sub driven plate 80a is driven by the driven plate. 40 and the connecting rod 70 are integrally connected so that they cannot move in the home direction. Therefore, the fall prevention plate 16a of the sub A unit 11a is locked and its movement is restricted. The same can be said for the sub-B unit 11b, so that the fall prevention plate 16b of the sub-B unit 11b is also locked, and even if a force to move in the home direction is applied for some reason, it is restricted. The

Next, the operation of storing from the protruding completion state will be described.
As shown in FIG. 27, when the motor 24 is driven clockwise, the driven plate 40 of the main unit 11U starts moving in the home direction. At the same time, the sub driven plates 80a and 80b connected by the connecting rod 70 also start moving in the home direction. In the sub A unit 11a, the adjustment stopper 88a is separated from the first step engagement portion 162a, and in the sub B unit 11b, the adjustment stopper 88b is separated from the first step engagement portion 162b. At this stage, the fall prevention plate of any unit does not move in the home direction (storage direction).

When the movement in the home direction proceeds, as shown in FIG. 28, first, in the sub B unit 11b, the fixing stopper 86b of the sub driven plate 80b approaches the first step engagement portion 162b of the fall prevention plate 16b and comes into contact therewith. . Thereafter, the fall prevention plate 16b moves integrally with the driven plate 40 and the sub driven plate 80b in the home direction.
When the movement in the home direction further proceeds, the fixed stopper 46 of the driven plate 40 of the main unit 11U then contacts the first step engaging portion 162 of the fall prevention plate 16. Thereafter, the fall prevention plate 16 moves together with the driven plate 40 in the home direction.

  When the movement in the home direction further proceeds, as shown in FIG. 29, the fixed stopper 86a of the sub driven plate 80a of the sub A unit 11a comes into contact with the first step engaging portion 162a of the fall prevention plate 16a. Thereafter, the fall prevention plate 16a moves integrally with the driven plate 40 and the sub driven plate 80a in the home direction.

  Then, as shown in FIG. 21, the sub A unit 11a is almost the same as the driven plate 40 of the main unit 11U abuts on the driven plate home side stopper 144 and cannot move any more. The second step engaging portion 164a of the fall prevention plate 16a contacts the fall prevention plate home side stopper 148a, and further movement in the home direction is restricted. Further, in the sub-B unit 11b, the second step engaging portion 164b of the fall prevention plate 16b abuts on the fall prevention plate home side stopper 148b, and further movement in the home direction is restricted. At this point, the platform falling prevention device 10 is in the storage completed state.

  The platform fall prevention device 10 of this embodiment includes a plurality of fall prevention plates 16, 16 a, 16 b each capable of adjusting the amount of protrusion to the track side. Therefore, it can respond to the platform of a curve section by adjusting the protrusion amount of each fall prevention plate appropriately. In addition, since only one device may be installed, the installation cost can be greatly reduced as compared with the case where a plurality of devices are installed.

[Power failure countermeasures]
Next, countermeasures against power interruption of the platform fall prevention device 10 will be described.
As shown in FIG. 30 (1), a handwheel handle 90 is prepared 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.

  Moreover, 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 (FIG. 1). Further, the upper surfaces of the home-side lock block 52H and the track-side lock block 52K are marked with a position 98 adjusted in advance so as to come to a predetermined position (for example, directly below) with respect to the confirmation window 96 when locked. (FIG. 8). 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 (FIG. 1), and the handwheel 90 is inserted into the connection hole 92 of the drive pulley 21 and connected as shown in FIG. As described above, in order to change the lock mechanism portion 50 of the present embodiment to the lock operation state / lock release state, the drive mechanism portion 20 needs only to be driven and the driving plate 30 to move. 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 store the fall prevention plate 16 or allow it to protrude. And if the fall prevention board 16 will be in a storage 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 home side lock blocks 52H and the track side lock block 52K corresponding to the locks in the projecting completion state and the storage completion state are provided, the protrusion completion state and the storage completion state are provided as one lock block. It is good also as comprising so that a lock is possible. In that case, the home-side limit switch 66H and the track-side limit switch 66K are provided, for example, in the vicinity of the driven-plate track-side stopper 142 and the driven-plate home-side stopper 144, and detect contact between the driven plate 40 and these stoppers. Can be used instead.

  In the above embodiment, one platform fall prevention device 10 is configured by one main unit and two subunits. However, the number of subunits can be changed as appropriate. For example, one main unit and one subunit can be configured. Or the structure which provides the subunit after the 3rd after the sub A unit 11a or the sub B unit 11b further is also possible.

  2 ... Platform, 3 ... Installation space, 10 ... Platform fall prevention device, 11U ... Main unit, 11a ... Sub A unit, 11b ... Sub B unit, 12 (12a, 12b) ... Top plate, DESCRIPTION OF SYMBOLS 14 ... Main frame, 16 (16a, 16b) ... Fall prevention plate, 18 ... Linear motion mechanism, 20 ... Drive mechanism part, 21 ... Drive pulley, 22 ... Drive pulley, 23 ... Timing belt, 24 ... Motor, 30 ... Drive Plate 31 31 Main part 32 Guide rail 33 Guide groove 34 Connecting arm 40 Drive plate 41 Main plate 42 Home side engagement piece 44 Track side engagement piece 45. Screw hole, 46 ... fixed stopper, 47 ... long hole, 48 ... first engaging portion, 49 ... bolt, 50 ... lock mechanism portion, 51 ... cam portion, 51a ... low lift region, 51b ... high lift region, 51c …slope 52H: Home side lock block, 52K: Track side lock block, 53 ... Block guide, 55 ... Stepped portion, 56 ... Roller, 58 ... Guide pin, 59 ... Coil spring, 60 ... Guide pin support, 61 ... Guide hole , 66H ... Home-side limit switch, 66K ... Track-side limit switch, 70 ... Connecting rod, 72 ... Guide rail, 75 ... Bolt, 80a, 80b ... Sub driven plate, 81 ... Main plate, 82 ... Home Side engagement piece, 84 ... Track side engagement piece, 85 ... Screw hole, 86 (86a, 86b) ... Fixed stopper, 87 ... Long hole, 88 (88a, 88b) ... Adjustment stopper, 89 ... Bolt, 90 ... handle, 92 ... connection hole, 92 ... connection height, 94 ... hatch for handle, 96 ... confirmation window, 98 ... mark, 142 (142a, 142b) ... track for driven plate Stopper, 144 (144a, 144b) ... Home-side stopper for driven plate, 146 (146a, 146b) ... Track-side stopper for fall prevention plate, 147 ... Long hole, 148 (148a, 148b) ... Home-side stopper for fall prevention plate 149 ... Bolt, 162 (162a, 162b) ... First step engagement part, 164 (164a, 164b) ... Second step engagement part

Claims (5)

A platform fall prevention device for projecting the first and second fall prevention plates at the time of getting on and off to close a gap between the platform and the stopped train,
A drive unit for generating a drive force for driving the fall prevention plate in the advancing and retracting direction;
A first follower plate provided corresponding to the first fall prevention plate and moving in the forward and backward direction by the driving force;
A second driven plate provided corresponding to the second fall prevention plate;
A connecting portion for connecting the first driven plate and the second driven plate;
With
The first follower plate engages with a first engaged portion of the first fall prevention plate during movement to move the first fall prevention plate in the forward / backward direction. The joint has a position adjustable in the forward / backward direction,
When the second driven plate moves together with the connected first driven plate, the second driven plate engages with the second engaged portion of the second fall preventing plate, and the second fall preventing plate is used. The second engaging portion that moves in the forward / backward direction has a position adjustable in the forward / backward direction,
A platform fall prevention device capable of adjusting the movement range of each of the first and second fall prevention plates by adjusting the position of each of the first and second engagement portions. The first engagement portion includes a first storage movement engagement portion provided at a fixed position of the first driven plate, and a first protrusion movement provided to be position-adjustable in the forward / backward direction. An engaging portion so as to sandwich the first engaged portion,
The second engagement portion includes a second storage movement engagement portion provided at a fixed position of the second driven plate, and a second protrusion movement provided to be position-adjustable in the forward / backward direction. Having an engaging portion so as to sandwich the second engaged portion,
The platform fall prevention device according to claim 1. The first fall prevention plate has a first stopper portion provided at a fixed position;
The second fall prevention plate has a second stopper portion provided at a fixed position,
The position of the first engaging portion is a first stopper portion that restricts movement of the first fall prevention plate in the protruding direction beyond the moving range by contacting the first stopper portion. The position can be changed according to the adjustment range.
The second stopper portion that restricts the movement of the second fall prevention plate in the protruding direction beyond the movement range when the second stopper portion abuts is positioned at the position of the second engagement portion. The position can be changed according to the adjustment range.
The platform fall prevention device according to claim 1 or 2. A lock block that makes a transition between a lock operation state that inhibits movement of the first driven plate for moving the first fall prevention plate and a lock release state that releases the inhibition;
A driving plate having a cam structure having an inclined cam surface at an end, and having a predetermined structure for causing a state transition of the lock block in an end region of the driving range;
Further comprising
The drive unit drives the driving plate in the forward / backward direction,
The first driven plate does not engage with the driving plate in the end region, and engages and follows when the driving plate moves in the forward / backward direction beyond the end region,
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.
The fall prevention device for platforms as described in any one of Claims 1-3. The drive mechanism portion is configured to be capable of manual driving by a handwheel handle in addition to electric driving by a motor.
The platform fall prevention device according to any one of claims 1 to 4.

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