JP2006298068A - Platform gap adjuster - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a platform gap adjuster simplified substantially, not requiring a large-scale reform of a platform, capable of meeting any size of gap between the platform and a car, and capable of keeping a sufficient strength for a load such as passengers. <P>SOLUTION: The platform gap adjuster is equipped with a sliding shoe 24 to make straight reciprocating motions in the vertical direction, a guide member 25 to guide the shoe in the vertical direction, a first supporting arm 22 having one end borne rotatably on the undersurface of a movable footboard and the other end which is borne by the shoe 24 rotatably, a second supporting arm 23 having one end borne rotatably in the position as dividing the first arm in two equal portions, with the other end borne rotatably in a stationary part 26 over a space S, and having a link length as one half of the first arm, a driving device 27 to slide the shoe 24 along the guide member 25, and position restricting means 29a and 29b to stop the footboard 21 in the protruding position or the retreat position. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  In order to prevent a passenger from falling on a track in a vehicle entrance / exit platform for a track such as a railway station, for example, the present invention provides a simple clearance between the platform tip and the vehicle entrance / exit. The present invention relates to a gap adjusting device that can be closed with a simple structure.

  Conventionally, when a train arrives on the premises at a railway station, if the track along the platform is a straight line, there is no large gap between each vehicle and the platform, but if the track is curved, the train T 9 is a straight line, on the platform located outside the train, as shown in FIG. 9 (a), between the entrances and exits near the center of the entrance T1 of each vehicle and the platform P In the platform located inside the train T, a large gap Q is generated between the platform T1 and the platform P near the front and rear ends of each vehicle, as shown in FIG. 9B.

Therefore, in order to fill the gap between the platform provided along the curved track and each vehicle of the train, a device having a movable tread that protrudes from the end of the upper surface of the platform toward the track has been proposed. .
For example, Patent Document 1 (Japanese Patent Application Laid-Open No. 2002-53035) discloses a platform fall prevention device including the above-described movable tread. This apparatus will be described with reference to FIG. In FIG. 10, this apparatus has a fall prevention device 020 installed so that an upper surface 014 of an edge 013 of a platform 010 is fitted into a recessed storage portion 015, and a pinion 032 and a pinion 032 that are rotationally driven by a motor 031. The drive mechanism 030 including the meshing rack member 025 causes the plate 024 integrated with the rack member 025 to protrude and retract toward the vehicle, and the fall prevention member (movable tread) 021 attached to the plates 023 and 024 to protrude and retract in the horizontal direction. The storage unit 015 is configured to be covered with the ceiling member 050 from above.
JP 2002-53035 A

  However, the apparatus disclosed in Patent Document 1 peels off the upper surface of the platform where a fall prevention member (movable tread) 021 is installed by a certain thickness, forms a storage portion 015 there, and drives the mechanism 030. It is necessary to make a large-scale modification of the platform, for example, it is necessary to make a through-hole 017 for inserting the motor 031 of this type, and the storage unit 015 is installed over the entire width of the fall-preventing member 021 and is prevented from falling. Since the pinion and the rack member are used as means for moving the member 021 in the horizontal direction, there is a problem that the apparatus configuration is large and complicated.

  Further, foreign matter such as dust is easily collected in the concave portion of the storage portion 015. If foreign matter is collected in the concave portion of the storage portion 015, the reciprocation of the fall prevention member 021 is likely to be hindered. Since it becomes cantilever support by the part 015, there exists a problem that support strength is weak.

  In view of the above-mentioned problems, the present invention can greatly simplify the apparatus, and does not require a large-scale modification of the platform when installed on the platform, and can be provided in a gap of any size between the vehicle and the platform. It is an object of the present invention to provide a gap adjusting device that can cope with and can maintain sufficient strength against a load caused by passengers getting on and off.

In order to achieve the above object, a gap adjusting device according to the present invention has a plate-like movable tread that has a length equal to or greater than the opening width of a vehicle entrance and exit from the upper end of the platform toward the track side. In the gap adjustment device that is provided so as to be able to appear and close and that closes the gap formed between the vehicle and the platform,
A slider disposed so as to be linearly reciprocable in a vertical direction in a space provided below the movable tread;
A guide member for guiding the slider in the vertical direction;
One end is pivotally attached to the lower surface of the movable tread and the other end is pivotally attached to the slider, and is obliquely mounted on the movable tread so as to support the movable tread from below. 1 support arm,
One end of the first support arm is pivotally attached to a position that bisects the other end, and the other end is pivotally attached to a fixed portion above the space portion, and is ½ of the first support arm. A second support arm having a link length of 1 and supporting the first support arm obliquely from above,
A drive device for projecting and moving the movable tread from the upper end of the platform toward the track,
Position regulating means for positioning the movable tread by stopping the drive device when the movable tread reaches a predetermined protruding position or retreat position;
The pivoting portion between the second support arm and the fixed portion is at a position where a horizontal plane passing through the movable tread and a vertical line passing through the pivoting portion between the first support arm and the slider intersect. It is characterized by being configured.

  In the device according to the present invention, the support mechanism for the movable tread is composed of the first support arm, the slider, the second support arm, and the guide member. The support mechanism has the above-described configuration, and when the movable tread plate is caused to protrude and retract from the upper end of the platform toward the track side by the driving device, the slider is accurately slid along the guide member in the vertical direction. Can be moved. The driving device may be a driving device that directly drives the movable tread, or a driving device that slides the slider in the vertical direction along the guide member. In this case, when the slider is slid in the vertical direction along the guide member, the movable tread plate reciprocates horizontally toward the track side accurately.

  The principle of this support mechanism will be described with reference to the schematic diagram of FIG. In FIG. 1, reference numeral 1 denotes a movable tread plate arranged so as to be movable in the horizontal direction, which is movable in a direction away from or approaching the base 7 provided in the fixed portion 6, and constant in the direction away from the base 7. Although it can move to a distance, further movement is prevented by this support mechanism.

Reference numeral 2 denotes a first support arm, one end of which is pivotally attached to the movable tread 1 at a joint point Y, and the other end is pivotally attached to the slider 4 at a joint point Z. The slider 4 is guided by the guide member 5 so as to be slidable in the vertical direction. The guide member 5 has a guide surface for guiding the slider 4 attached to the fixed portion 6 in the vertical direction.
Reference numeral 3 denotes a second support arm, one end of which is pivotally mounted at a coupling point W that bisects the length YZ of the first support arm 2 and the other end is a base 7 and a coupling point X. The second support arm 3 is pivotally attached to the shaft, and the length XW of the second support arm 3 is ½ that of the first support arm 2. That is, YW = ZW = XW.
The junction X is located at the intersection of a horizontal plane h passing through the movable tread 1 and a vertical line v passing through the coupling point Z.

When the above relationship is established, if the movable tread plate 1 reciprocates linearly in the horizontal direction, the slider 4 strictly reciprocates linearly in the vertical direction.
Next, how the load applied when a passenger gets on the movable tread 1 acts on the support structure of the movable tread 1 will be described. The force (load) applied when a passenger gets on the movable tread 1 is represented as a force A applied vertically downward to the point Y in FIG. Separating the component force A ₂ to act a force A in the horizontal direction component force A ₁ and a first direction of the supporting arm 2, the force component A ₁ in the horizontal direction, to generate the moment around the attachment point W, Since YW = ZW, a force B having the same magnitude and the opposite direction as A ₁ is generated at the coupling point Z.

The force which the second support arm 3 is applied to the first support arm is represented in C, and the force C to the first support arm 2 in the direction of the force component C ₁ and the horizontal component force C ₂ nits When divided, the component force C ₁ is canceled with the component force A _2, and only the component force C _{2 in the} horizontal direction remains.
Thus for the first support arm 2 eventually, only horizontal force component B and C ₂ remain.

If the support mechanism of the present invention is employed in this way, no vertical force acts on the slider 4, but only a horizontal force acts, so the movable tread is moved from the upper end of the platform toward the track side. A large driving force is not required when going up and down.
There are means for directly moving the movable tread plate and means for driving the movable tread plate by moving the slider 4 up and down in the vertical direction. Since no vertical force is applied, no driving force is required by any of the above means.

Further, since a vertical force does not act on the slider 4, it becomes easy to hold the slider at an arbitrary position.
For example, when a driving device for driving the slider 4 is provided, the slider can be held at a fixed position only by the holding force of the driving device.
In addition, the amount of protrusion of the movable tread to the track side can be freely adjusted by simply setting the vertical position of the slider 4 as appropriate, and the movable tread can be adjusted only by holding the slider 4 at an arbitrary position. Can also be held at any protruding position. Thus, the projecting position of the movable tread 1 is determined by the vertical position of the slider 4, and since the movable tread is supported by the support mechanism, the movable tread 1 will not drop out past the allowable projection limit position. Absent.

In the apparatus of the present invention, there is provided position restriction means for positioning the movable tread by stopping the driving device when the movable tread reaches a predetermined protruding position or retracted position.
As the position regulating means, for example, a contact type switch such as a limit switch or a proximity switch such as a magnetic switch can be used, and it may be attached to either the movable tread plate side or the fixed part of the platform. By changing the mounting position of such position restricting means, the protruding position or the retracting position of the movable tread can be arbitrarily adjusted.
In addition, it is necessary to ensure the safety at the time of passenger getting on and off by making the length of the movable tread in the longitudinal direction longer than the width of the entrance and exit of the train.

In the device according to the present invention, preferably, in order to simplify the device, the movable tread plate supporting mechanism including the slider, the guide member, the first support arm, and the second support arm is used as the movable tread plate. The drive device and the position restricting means may be provided in at least one of the support mechanisms.
In the device of the present invention, the driving device for directly driving the movable tread is preferably a slider coupled to the movable tread, a guide member for guiding the slider in the horizontal direction, a screw hole formed in the slider, It consists of a ball screw screwed into the screw hole and an electric motor that rotationally drives the ball screw.
The drive device for sliding the slider along the guide member is preferably constituted by a chain or belt to which the slider is connected and an electric motor for driving the chain or belt.

In the device of the present invention, preferably, the drive device is operated in conjunction with a vehicle stop signal or a vehicle start signal from a vehicle cab, or in conjunction with a detection signal when a vehicle has entered or started on the platform. It is configured to be driven or stopped.
In the apparatus of the present invention, when the movable tread reaches the protruding position, a cover plate is placed on the upper surface of the movable tread so as to eliminate a step from the upper surface of the platform.

According to the device of the present invention, a slider disposed so as to be linearly reciprocable in a space portion provided below the movable tread, a guide member for guiding the slider in the vertical direction, and one end thereof A first pivotally mounted on the lower surface of the movable tread and the other end pivotally pivotally mounted on the slider and mounted obliquely with respect to the movable tread to support the movable tread from below. One end of the support arm and a position at which the first support arm is divided into two halves are pivotally attached, and the other end is pivotally attached to a fixed portion above the space portion. A second support arm having a link length of 1/2 of the above and supporting the first support arm obliquely from above, a drive device for projecting and retracting the movable tread from the upper end of the platform toward the track side, and When the movable tread reaches a predetermined protruding position or retracted position, the driving device is stopped to move the movable tread Position regulating means for positioning, and a shaft attachment portion between the second support arm and the fixed portion is a horizontal surface passing through the movable tread, and a shaft attachment portion between the first support arm and the slider. By configuring it so that it is at a position that intersects the vertical line that passes through, the movable tread can be accurately moved in the horizontal plane, and the movable tread does not tilt, so passengers on the movable tread can slip It is possible to ensure the safety of passengers.
Further, as described above, since a downward load is not applied to the slider, the movable tread can be smoothly moved to the protruding position or the retracted position with a small driving force.

  Even in the case where a driving device is provided for sliding the slider in the vertical direction along the guide member, the slider strictly in the vertical direction with respect to the horizontal movement of the movable tread. Because it moves linearly, it can slide smoothly along the guide member arranged in the vertical direction, and the vertical force is not applied to the slider, but only the horizontal force is applied. By fixing the guide member to a fixed part that can resist the horizontal force, it is possible to support the passenger's load applied to the movable tread. Therefore, the support mechanism for the movable tread can be made extremely simple.

In addition, since no vertical force is applied to the slider, it is easy to stop the slider at an arbitrary position, so that the projecting position of the movable tread to the track side can be freely adjusted and the slider can be freely adjusted. The movable tread can be held at an arbitrary protruding position without providing any fixing means for the movable tread just by holding the moving element at a predetermined position.
Further, since no vertical force is applied to the slider, the slider can be held at an arbitrary height only by the holding force of the driving device.

The support mechanism of the movable tread of the present invention does not take a place, and when it is installed on the platform, only the installation part of the support mechanism needs to partially remove the concrete, and can be unitized. Just a renovation.
Further, since the movable tread has the tip supported by the first support arm, it is not cantilevered as in Patent Document 1, and has sufficient strength to support the movable tread even when the movable tread protrudes. .

  Furthermore, the movable tread is protruded or retracted to a desired position by providing a position restricting means for positioning the movable tread by stopping the driving device when the movable tread reaches a predetermined protruding position or retracted position. Preferably, the position regulating means is a contact type switch or a proximity switch, and the projecting position or the retracting position of the movable tread can be arbitrarily changed by changing the mounting position.

  Preferably, a movable tread by a passenger is obtained by disposing a plurality of movable tread support mechanisms including a slider, a guide member, a first support arm, and a second support arm along the longitudinal direction of the movable tread. It is possible to provide the movable tread with a sufficient strength against the load on the vehicle, and the drive device and the position restricting means may be provided in at least one of the support mechanisms, and this configuration further simplifies the device. It becomes possible.

Preferably, the driving device is driven or stopped in conjunction with a vehicle stop signal or a vehicle start signal from a vehicle cab, or in response to the detection signal when the vehicle has entered or started on the platform. With this configuration, the moving operation of the movable tread can be performed systematically at the optimum timing in conjunction with the start and stop of the vehicle.
Preferably, when the movable tread reaches the protruding position, a cover plate is placed on the upper surface of the movable tread so as to eliminate a step from the upper surface of the platform. Conversely, it is possible to smoothly and safely move passengers from the movable tread board to the platform.

Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. However, the dimensions, materials, shapes, relative positions, and the like described in this embodiment are merely illustrative examples and not intended to limit the scope of the present invention unless otherwise specified.
2A and 2B relate to a first embodiment of the apparatus of the present invention, in which FIG. 2A is a plan view showing the time of protrusion (during operation), FIG. 2B is the time of retraction (during storage), and FIG. 4 is a side sectional view taken along the line BB in FIG. 2, FIG. 5 is a side sectional view taken along the line CC in FIG. 2, and FIG. These are sectional side views which follow the DD arrow in FIG.

  In FIG. 3 which shows the AA cross section in FIG.2 and FIG.2 (a), 11 is the flame | frame assembled in the space S provided in the platform P, 12 is a covering plate which covers the space S, and covers The plate 12 is supported by the frame 11 and forms the same height as the upper surface of the platform P other than the place where the movable tread is installed. The cover plate 12 may be exchangeable by being detachably attached to the frame 11, for example. Reference numeral 21 denotes a flat plate-shaped movable tread that is disposed horizontally at the front end of the upper surface of the platform P, and is configured to be stored under the cover plate 12 when not in use and project from the platform P to the track side when in use. A groove steel 21a to which one end of a first support arm 22 (to be described later) is coupled is fixed to the back surface of the movable tread 21 while providing rigidity to the movable tread.

  Reference numeral 22 denotes a first support arm, one end of which is pivotally attached to the grooved steel 21a of the movable tread plate 21 at the joint Y, and the other end is pivotally attached to the linear guide 24 at the joint Z. Has been. The linear guide 24 is loosely fitted to the guide rail 25 and is slidably guided in the vertical direction. The guide rail 25 is a frame 13 in which a rail surface loosely fitted to the linear guide 24 and guided is fixed in the space S. Is attached vertically.

Reference numeral 23 denotes a second support arm. One end of the second support arm is pivotally attached to a joint portion W that bisects both the joint portions Y and Z of the first support arm 22, and the other end is attached to the frame 13. Attached to the base portion 26 and the coupling portion X is pivotally mounted. The length XW of the second support arm 23 is exactly half the length of the first support arm 22. That is, YW = ZW = XW.
Further, the position where the second support arm 23 and the base 26 are attached to each other is such that the horizontal plane h passing through the movable tread 21 and the vertical line v passing through the first support arm 22 and the linear guide 24 are provided. It is configured to be in.

A support mechanism for the movable tread plate 21 is configured by the above configuration. As shown in FIG. 2, a plurality of such support mechanisms are arranged in the longitudinal direction of the movable tread plate 21, and the coupling portion Y of the first support arm 22 with the movable tread plate 21 is between the support mechanisms. The front channel steel 21a and the rear channel steel 21b are alternately selected.
Reference numeral 27 denotes an electric motor installed on the fixed frame 13, and a chain 28 arranged in a direction perpendicular to the output shaft of the electric motor 27 is wound, and the chain 28 is rotated vertically by rotating the output shaft forward or backward. The linear guide 24 attached to the chain 28 is slid vertically along the guide rail 25 in the vertical direction.
The drive motor 27 and the chain 28 are installed only in the support mechanism shown in FIG. 3 (AA cross section in FIG. 1), and are not installed in other support mechanisms. For example, in the support mechanism illustrated in FIG. 4 (cross section BB in FIG. 2), the guide rail 25 is fixed to the frame 11 erected in close contact with the wall surface of the platform P.

Next, a specific example of position restricting means for positioning the movable tread plate 21 by stopping the drive motor 27 when the movable tread plate 21 reaches a predetermined protruding position or retracted position will be described.
In FIG. 6 (DD cross section in FIG. 2), 29a and 29b are limit switches attached to the frame 14 attached in the horizontal direction to the frame 11 provided in the space S, and the limit switch 29a is The movable tread 21 protrudes from the end of the platform P to the track side and is activated when the movable tread 21 reaches the set projection limit position, and the operation of the drive motor 27 is stopped. The operation of the drive motor 27 is stopped when it reaches the fully retracted position below 12.

FIG. 7 is a block diagram showing the control system of the first embodiment. In FIG. 7, 32 is an operation panel installed in the cab of the vehicle, from which a vehicle stop signal 35 or a vehicle start signal 36 is transmitted to the control device 31.
33 is a vehicle approach detection device provided on the station side platform P, and 34 is a vehicle start detection device similarly provided on the station side platform P.

In the apparatus of the first embodiment, when the train enters the platform P, the control device 31 receives the vehicle stop signal 35 transmitted from the operation panel 32 installed in the cab of the train, or the station side platform. The vehicle approach detection device 33 provided at P detects the entry of the vehicle, transmits the detection signal to the control device 31, and the control device 31 operates the movable tread plate drive motor 27 based on these signals.
Accordingly, when the drive motor 27 is operated and the linear guide 24 is slid upward, the movable tread plate 21 protrudes from the front end portion of the platform P to the track side. When the movable tread 21 comes to the protrusion limit position, the limit switch 29a is activated and the movable tread 21 is stopped.

For example, the projecting dimension of the movable tread 21 from the front surface of the platform P to the vehicle side is 150 to 200 mm, and the length of the movable tread 21 in the longitudinal direction is set to about 2000 mm. The length of the movable tread 21 is made longer than the width of the entrance / exit of the train to ensure safety when passengers get on and off.
After the passenger finishes getting on and off and closes the entrance of the vehicle, when the vehicle start signal 36 is transmitted from the operation panel 32 installed in the cab of the train, the control device 31 receives the signal, or the platform P When the vehicle start detecting device 34 detects the start of the vehicle and the detection signal is sent to the control device 31, the output shaft of the drive motor 27 is reversely rotated, and the linear guide 24 is slid downward to be movable. The step board 21 is moved away to the platform P side. When the movable tread plate 21 is completely retracted to the lower side of the covering plate 12, the limit switch 29b is activated to stop the operation of the drive motor 27.

  According to the apparatus of the first embodiment, as explained in FIG. 3 showing the AA cross section in FIG. 2 and FIG. 2, the relationship is YW = ZW = XW, and the second support arm. 23 and the base 26 are configured such that a horizontal plane h passing through the movable tread 21 and a vertical line v passing through the first support arm 22 and the linear guide 24 intersect each other. Therefore, the linear guide 24 accurately performs the linear motion in the vertical direction with respect to the horizontal linear motion of the movable tread 21.

  Accordingly, by arranging the guide rail 25 accurately in the vertical direction, the movable tread 21 can be accurately moved in the horizontal plane, and since no downward force is applied to the linear guide 24, the linear guide 24 is moved to the guide rail. A means for fixing separately on 25 is not required, and the support by the chain 28 to which the linear guide 24 is connected is sufficient. Conversely, a large load is not applied from the linear guide 24 to the driving devices such as the chain 28 and the motor 27.

Further, the support mechanism including the first and second support arms 22 and 23, the linear guide 24, the guide rail 25, and the like does not occupy the lateral volume of the platform P and can be installed in an extremely narrow space. It is not necessary to provide a space in the platform P over the entire width of the movable tread as in 1, and a small installation space is sufficient, so that the construction work is simple.
Further, according to the apparatus of the present embodiment, the storage unit 015, the driving mechanism 030 including the motor and the rack member, and the like as in Patent Document 1 are not necessary, and an extremely simple configuration can be achieved.

Further, since the movable tread 21 is not supported in a cantilever manner as in Patent Document 1, but is supported at both ends, a sufficient strength against the load of passengers can be maintained, and the vertical direction of the linear guide 24 can be maintained. Since this movement accurately draws a vertical straight line, vertical guidance by the guide rail 25 can be performed very smoothly.
The drive mechanism including the drive motor 27 and the chain 28 may be provided in any one of the support mechanisms, and the device configuration can be simplified, and the movable tread can be selected by appropriately selecting the installation positions of the limit switches 29a and 29b. The maximum protruding position and the leaving position of 21 can be arbitrarily selected.

Furthermore, based on the vehicle stop signal 35 or the vehicle start signal 36 transmitted from the operation panel 32 installed in the cab of the vehicle, or the detection signal of the vehicle approach detection device 33 or the vehicle start detection device 34 installed on the platform P. Since the driving of the movable tread 21 is controlled, the driving of the movable tread 21 can be automated, and can be performed systematically without error at an optimal timing according to the start and stop of the vehicle.
As shown in FIG. 6, when the movable tread 21 reaches the protruding position, the cover plate 41 is placed on the upper surface of the movable tread 21 so that the step with the upper surface of the platform is eliminated. It is possible to smoothly and safely move passengers to and from the tread 21 and vice versa from the movable tread 21 to the platform P.

Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 8 is a cross-sectional view of the drive unit of the movable tread of the second embodiment. That is, it is a cross-sectional view at a position corresponding to the AA cross section in the first embodiment of FIG. In FIG. 8, a space S is formed in the platform by a frame 51, a base frame 52, and the like, and a cover plate 53 is horizontally installed at a height that coincides with the upper surface of the platform.
54 is a movable tread plate installed horizontally on the back side of the cover plate 53, and is connected to one end of an arm 56 by a connecting portion 55, and the other end of the arm 56 is connected to a slider 58 by a connecting portion 57.

  The slider 58 slides on a guide rail 59 installed in the horizontal direction. The guide rail 59 is formed on the upper surface of the casing 60. In FIG. 8, the sliding surface on the front side of the slider 58 is omitted. The casing 60 is supported in the horizontal direction by a support frame 61, and the support frame 61 is supported by a support bar 62 attached to the frame 51.

Inside the casing 60, an electric motor 63 and a ball screw 64 connected to its output shaft are accommodated. The ball screw 64 is screwed into a screw hole 58 a that is drilled in the lower portion of the slider 58 and is screwed through a circulating ball. When the ball screw 64 is rotated by the electric motor 63, the slider 58 slides in the axial direction of the ball screw 64. It comes to move. Reference numeral 65 denotes a bearing that rotatably supports the other end of the ball screw 64. Reference numeral 66 denotes an incoming terminal that supplies power to the drive motor 63.
FIG. 8 shows a drive mechanism for the movable tread plate 54 in the second embodiment. The second embodiment is different from the first embodiment only in the drive mechanism for the movable tread plate 54, and other parts, that is, positions of limit switches and the like. The restricting means and the support means for the movable tread have the same structure as in the first embodiment.

  According to the second embodiment having such a configuration, the slider 58 is directly connected to the movable tread plate 54 instead of driving the movable tread plate through the linear guide 24 and the second support arm 22 as in the first embodiment. Thus, the load applied to the drive mechanism is further reduced, and the drive mechanism is simplified, and the same operational effects as those of the first embodiment can be achieved.

  According to the present invention, the apparatus can be greatly simplified, and when installed on a platform, no major modification of the platform is required, and a gap of any size between the vehicle and the platform can be accommodated. In addition, it is possible to provide a clearance adjustment device that can maintain sufficient strength against the load caused by passengers getting on and off.

It is principle explanatory drawing of this invention apparatus. It is a top view of 1st Example of this invention apparatus, (a) is at the time of protrusion, (b) shows the time of leaving. It is an AA cross section side view in FIG. It is a BB cross-section side view in FIG. It is CC sectional side view in FIG. FIG. 3 is a cross-sectional side view taken along the line DD in FIG. 2. It is a block diagram which shows the control system of the said 1st Example. It is a cross-sectional side view of 2nd Example of this invention apparatus. It is a top view which shows the relationship between a curved platform and a train. It is a disassembled perspective view of the conventional platform clearance gap adjusting device.

Explanation of symbols

1, 21, 54 Movable tread 2,22 First support arm 3,23 Second support arm 4 Slider 5 Guide member 6 Fixed portion 7, 26 Base 11, 13, 14, 51 Frame 12, 53 Cover plate 21a, 21b Channel steel 24 Linear guide 25, 59 Guide rail 27, 63 Drive motor 28 Chain 29a, 29b Limit switch 55, 57 Connection part 56 Arm 58 Slider 60 Casing 61 Support frame 62 Support bar 64 Ball screw 65 Bearing bearing 66 Power incoming Terminal A Load for passengers Y, X, Z, W Connection point

Claims (8)

A flat plate-shaped movable tread that is longer than the opening width of the vehicle entrance and exit is provided so as to be able to protrude from the upper end of the platform toward the track side, and a gap formed between the vehicle and the platform In the gap adjustment device designed to block
A slider disposed so as to be linearly reciprocable in a vertical direction in a space provided below the movable tread;
A guide member for guiding the slider in the vertical direction;
One end is pivotally attached to the lower surface of the movable tread, and the other end is pivotally attached to the slider, and is obliquely mounted on the movable tread so as to support the movable tread from below. 1 support arm,
One end of the first support arm is pivotally attached to a position that bisects the other end, and the other end is pivotally attached to a fixed portion above the space portion, and is ½ of the first support arm. A second support arm having a link length of 1 and supporting the first support arm obliquely from above,
A drive device for projecting and moving the movable tread from the upper end of the platform toward the track,
Position regulating means for positioning the movable tread by stopping the drive device when the movable tread reaches a predetermined protruding position or retreat position;
The pivoting portion between the second support arm and the fixed portion is at a position where a horizontal plane passing through the movable tread and a vertical line passing through the pivoting portion between the first support arm and the slider intersect. A platform gap adjusting device characterized in that it is configured as described above.   2. The platform gap adjusting device according to claim 1, wherein the driving device is a driving device that slides the slider in the vertical direction along the guide member. A plurality of support mechanisms for the movable tread plate composed of the slider, the guide member, the first support arm, and the second support arm are dispersedly arranged along the longitudinal direction of the movable tread plate,
3. The platform gap adjusting device according to claim 1, wherein the driving device and the position restricting means are provided in at least one of the support mechanisms.   The drive device includes a slider coupled to the movable tread, a guide member for horizontally guiding the slider, a screw hole formed in the slider, a ball screw screwed into the screw hole, and the ball screw. 3. The platform clearance adjusting device according to claim 1, wherein the platform clearance adjusting device comprises an electric motor that rotates.   4. The drive device according to claim 2, wherein the drive device includes a chain or belt connected to the slider and arranged in a vertical direction along the guide member, and an electric motor that drives the chain or belt. The platform gap adjusting device according to any one of the above.   The position restricting means is a contact type switch or a proximity switch, and by changing the mounting position, the projecting limit position and the retreat limit position of the movable tread can be changed to arbitrary positions. The platform clearance adjusting device according to any one of -5.   The drive device is configured to be driven or stopped in conjunction with a vehicle stop signal or a vehicle start signal from a vehicle cab or in response to a detection signal when the vehicle has entered or started on the platform. The platform gap adjusting device according to any one of claims 1 to 6.   8. The step according to claim 1, wherein when the movable tread reaches a protruding position, a cover plate is placed on the upper surface of the movable tread so as to eliminate a step from the upper surface of the platform. Platform clearance adjustment device.

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