JP3474434B2 - Step device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a step device in which a step plate for carrying a person, luggage or the like can be arranged at different positions when in use and when in storage. For example, a train stops on a platform. It is used as a device for temporarily closing a gap between the floor of the entrance / exit entrance and the platform to form a passage.

[0002]

2. Description of the Related Art Since "Komachi" and "Tsubasa" of the Shinkansen also stop on the platform of conventional lines, those vehicles that are narrower than those of "Hikari" are used. Therefore, when "Komachi" or "Tsubasa" stops on a normal Shinkansen platform, a wide gap is left between the entrance and exit platform.

Therefore, in order to close the above-mentioned gap, the following step device is attached below the floor surface of the entrance / exit of those vehicles. FIG. 5 is a front sectional view of a conventional step device 80, and FIG. 6 is a step device 80.
FIG.

As shown in FIGS. 5 and 6, the step device 80 includes a step plate 81, a body frame 82, drawer frames 83L and 83R, and link members 84L and 84.
R, pneumatic cylinder 85, connecting shaft P1, shaft member P
2L, P2R, P3L, P3R, and trunnion fitting P
4 and so on.

The step plate 81 is rotatably connected to the body frame 82 about the connecting shaft P1. The step plate 81 and the drawer frame 83 are connected by link members 84L and 84R.

The main body frame 82 is integrally fixed to the frame of the vehicle, and the main body frame 82 forms a space SP1 that is long in the depth direction and has a low height below the floor surface TF1 of the entrance / exit of the vehicle.

As shown in FIG. 6, the drawer frame 83 is substantially U-shaped in plan view and has a left arm member 83L, a right arm member 83R, and a center arm member 83C. There is.

The link members 84L and 84R are rotatably connected to the step plate 81 by shaft members P2L and P2R, respectively. Further, the link members 84L, 8
4R is a shaft member P3 in each of the left arm member 83L and the right arm member 83R of the drawer frame 83.
It is rotatably connected by L and the shaft member P3R.

The pneumatic cylinder 85 has a trunnion fitting P.
4 rotatably supports the main body frame 82. As shown in FIG. 5, the piston rod 85R of the pneumatic cylinder 85 is rotatably attached at the center of the arm member 83C at the center of the drawer frame 83.

Compressed air is supplied to the pneumatic cylinder 85,
When the piston rod 85R is moved in the direction of arrow M1 in FIG. 5, the drawer frame 83 moves in the same direction of arrow M1 and is pushed into the space SP1. As a result, the step plate 81 rotates about the connecting shaft P1 in the direction of the arrow M3 and is arranged at the storage position (the position indicated by the chain double-dashed line in FIG. 5).

Further, when compressed air is supplied to the pneumatic cylinder 85 so that the piston rod 85R moves in the direction of arrow M2, the drawer frame 83 also moves in the same direction of arrow M2, and as shown by the solid line in FIG. It is derived from SP1. Therefore, the step plate 81 rotates about the connecting shaft P1 in the direction of the arrow M4 and is arranged at the use position (the position shown by the solid line in FIG. 5).

When the vehicle is stopped on a normal Shinkansen platform, the step plate 81 can be placed in the use position to close the gap between the entrance and exit platform. The step plate 81 is arranged at the storage position when the vehicle is traveling or when the vehicle stops on the platform of the conventional line.

When the step plate 81 is in the use position, the straight line L0 connecting the shaft members P2L and P3L has an inclination angle δ with respect to the vertical axis Z. The same applies to the positional relationship between the shaft members P2R and P3R.

Therefore, even when the pressure supplied to the pneumatic cylinder 84 becomes low when the load is applied to the step plate 81, the step plate 81 is mechanically locked by the link members 84L and 84R. In this state, the step plate 81 is prevented from rotating in the direction of the arrow M3, which is safe.

[0015]

However, in the above-described conventional step device 80, the drawer frame 83 is drawn out or pushed into the main body frame 82. In order to smoothly perform these operations, a guide plate for sliding is provided between the left and right arm members 83L and 83R of the drawer frame 83 and the main body frame 82, or the left arm member 83L and the right arm member 83R. It is necessary to make the degree of parallelism with and high accuracy, and the structure of the device becomes complicated and the manufacturing cost becomes high.

Further, since the drawer frame 83 has a relatively large width dimension, which is the length in the direction perpendicular to the moving direction (directions of the arrows M1 and M2), the step plate 81.
Deformation of the drawer frame 83 itself in plan view and displacement in the moving direction are likely to occur due to the uneven load and the like. In particular, in the drawer frame 83, since only the center of the center arm member 83C is driven by the pneumatic cylinder 85, it is easy to lose the balance during movement.

Therefore, when the drawer frame 83 is pulled out or pushed in, maintenance is not easy in order to maintain a smooth operation, and in some cases the drawer frame 83 tilts in the space SP1 to cause a so-called "koze". There is a risk that a phenomenon may occur and lock may occur.

Further, in the maintenance of the step device 80, it is necessary to take out the drawer frame 83 from the space SP1 to the outside in order to check the drawer frame 83, and the work is extremely troublesome.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a step device having a relatively simple structure, a smooth operation, and easy manufacture and maintenance.

[0020]

According to a first aspect of the present invention, there is provided a device for moving a first rotating shaft between a main frame and a horizontal use position and a retracted position retracted downward from the use position. A step plate rotatably provided in the center, a first link member arranged on the lower surface side of the step plate and rotatably provided around a second rotation axis, and one end A second link member rotatable with respect to the first link member about a third rotation axis and having the other end rotatable with respect to the body frame about a fourth rotation axis; One end is rotatable with respect to the first link member and the second link member about the third rotation shaft, and the other end is rotatable with respect to the body frame about a fifth rotation shaft. And a cylinder device provided on the second link member.
The main body when the step plate is in the use position.
By abutting on the abutting portion provided on the frame,
The same direction from the use position to the storage position
A rotation rule for restricting rotation of the second link member
If the control member is provided and the step plate is in the use position,
The rotation restricting member is brought into contact with the contact portion.
Therefore, the load applied to the step plate is applied to the first link portion.
So as to support it through the material and the second link member,
The position of the third rotation shaft is the same as that of the second rotation shaft and the fourth rotation.
It is arranged below the straight line connecting the axis .

[0021]

According to a second aspect of the present invention, the rotation restricting member is configured to be able to adjust the inclination angle of the second link member when the rotation restricting member and the contact portion are in contact with each other. It becomes.

According to a third aspect of the present invention, each of the second rotating shaft and the third rotating shaft is one long shaft,
The first link member and the second link member are provided at both ends of the second rotating shaft and the third rotating shaft, respectively.

According to a fourth aspect of the present invention, the second rotating shaft, the third rotating shaft, the fourth rotating shaft, the first link member, and the second link member are unitized. It becomes. The "horizontal state" as used herein may be a substantially horizontal state, and also includes an inclined state that can be used as a passage.

[0025]

1 is a front sectional view of a step device 1 according to the present invention, and FIG. 2 is a step plate 2 of the step device 1.
0 is a plan view showing a state in which the upper plate is removed, FIG. 3 is a view showing the operation of each member forming the link unit LU of the step device 1, and FIG. 4 is an enlarged view of a part of each member forming the link unit LU. FIG.

As shown in FIGS. 1 and 2, the step device 1 includes a body frame 10, a step plate 20, a link member 30, a link member 40, a cylinder device 50, a balance member 60, a step plate shaft J1, and a link. Shafts J2, J3, J4, and clevis fittings J5. The link shafts J2, J3, and J4 each have a length dimension close to the width dimension of the space SP.

The body frame 10 is a floor surface T of the entrance / exit of the vehicle.
Below F, it is integrally fixed to the frame of the vehicle by bolts or the like. A space SP that is long in the depth direction and has a low height is formed below the entrance / exit floor surface TF of the vehicle by the body frame 10.

The step plate 20 is a metal plate for temporarily closing the gap between the platform HM and the entrance / exit TD, and is used as a passage for a person to walk or a passage for carrying luggage.

The step plate 20 is rotatably connected to the body frame 10 about a step plate shaft J1. By rotating the step plate 20, the step plate 20 is arranged in the horizontal use position PU when in use, and in the storage position PD retracted from the use position PU when not in use. 1 and 3, the state when the step plate 20 is in the use position PU is a solid line, and the storage position PD
The state at the time of is indicated by a chain double-dashed line.

The link member 30 is disposed on the lower surface side of the step plate 20, one end of which is rotatably connected to the connecting fitting 21 provided on the back surface of the step plate 20 by the link shaft J2, and the other end of which is a link. The link shaft 40 is rotatably connected to one end of the link member 40.

As best shown in FIG. 2, the link member 3
Zeros are provided as link members 30L and 30R at both ends of the link shaft J2. The link member 40 has one end rotatably connected to the link member 30 by the link shaft J3 and the other end rotatably connected to the connecting fitting 12 fixed to the main body frame 10 by the link shaft J4. .

The link member 40 is a link shaft J3.
One link member 40L and one link member 40R are provided at both ends. Link members 40L, 40R
Are arranged immediately inside the link members 30L and 30R, respectively. A connecting member 60 is provided on the link shaft J3 so as to cover the outside thereof.

At both ends of the connecting member 60, the connecting member 60 slides in the rotational direction with the link shaft J3. as a result,
The connecting member 60 is rotatable around the link shaft J3. At the center of the connecting member 60 in the longitudinal direction,
The piston rod 50R of the cylinder device 50 is connected. As a result, the driving force of the cylinder device 50 is transmitted to the link shaft J3 via the connecting member 60. The connecting member 60 has a large weight on the side opposite to the connected side of the piston rod 50R about the link shaft J3, thereby canceling out the moment around the link shaft J3 due to the weight of the cylinder device 50.

A rotation restricting member 41 is provided on the projecting portion 40a of the link member 40. When the step plate 20 is in the use position PU, the rotation restricting portion 41 contacts the contact portion 11 provided on the body frame. When the rotation restricting portion 41 contacts the contact portion 11, the rotation of the link member 40 in the direction of the arrow M12 is restricted at that position.

The rotation restricting member 41 is a hexagon socket head cap screw, and is screwed into a screw hole provided in the protrusion 40a. Therefore, by rotating the rotation restricting member 41, the rotation angle position of the link member 40 when contacting the contact portion 11, that is, the attitude of the step plate 20 at the use position PU is adjusted. After the rotation restricting member 41 is adjusted, it is locked by the nut 42. Due to the presence of the rotation restricting member 41, the position of the step plate 20 can be easily adjusted. Therefore, it is possible to absorb a processing error of each part of the step device 1 and a dimensional variation between the vehicle and the platform HM.

At the use position PU of the step plate 20,
The link shaft J3 is located below the straight line L1 connecting the link shaft J2 and the link shaft J4. Therefore, the load applied to the step plate 20 acts so as to rotate the link member 30 in the right direction and the link member 40 in the left direction in FIG. 3, respectively. However, since the rotation restricting member 41 is in contact with the contact portion 11, the link member 40 and the link member 30 do not rotate. That is, the step plate 20 is mechanically locked in its use position PU. Therefore, it is safe even if the pressure supplied to the cylinder device 50 drops.

A metal fitting 43 is attached to the link member 40, and when the step plate 20 reaches the use position PU due to the extension of the piston rod 50R, the metal fitting 43 contacts the link member 30. The link member 30 and the link member 40 are regulated so as not to rotate further. The pad fitting 43 increases the rigidity at the use position PU and increases the stability. However, since the rotation restricting member 41 also performs the same function, the metal fitting 43 may be omitted. Alternatively, only the metal fitting 43 may be provided and the rotation restricting member 41 may be omitted.

As best shown in FIGS. 1 and 2, the cylinder device 50 is rotatably connected to the body frame 10 by a clevis metal fitting J5 on the head side. The tip portion of the piston rod 50R has the connecting member 6 as described above.
It is connected to the center of 0. The cylinder device 50 is provided with a detection switch for detecting the stroke position of the piston rod 50R. The output signal of the detection switch interlocks with the operation of the vehicle.

Next, the operation of the step device 1 will be described. The cylinder device 50 is in a contracted state when the vehicle is traveling and in the section of the conventional line, and thus the step plate 20 is in the storage position PD. When a normal Shinkansen station is approached within a predetermined distance while the vehicle is running, the cylinder device 50 expands, and the link member 30 and the link member 40 rotate to rotate the step plate 20.
Moves from the storage position PD to the use position PU. After the step plate 20 reaches the use position PU, the door of the entrance and exit opens. Passengers pass through the step board 20 between the entrance and exit and the platform HM.

The load applied to the step plate 20 is the link shaft J2, the link member 30, and the link shaft J.
It is supported by 3, the link member 40, the link shaft J4, and the contact portion 11. At this time, the cylinder device 5
Since the force does not act in the direction of contracting the piston rod 50R of 0, even if the pressure of the compressed air supplied to the cylinder device 50 decreases, the piston rod 50R does not contract and it is safe.

Further, since the step plate 20 is moved and driven by the single cylinder device 50, the instability of the operation due to the lack of synchronization among the cylinder devices as in the case of using a plurality of cylinder devices is eliminated. , The operation is smooth. Also, no adjustment work is required to synchronize.

When the vehicle leaves the platform HM and reaches a predetermined speed or more, the piston rod 50R of the cylinder device 50 contracts, and the step plate 20 moves to the retracted position P.
Move to D.

By disposing the step plate 20 in the storage position PD, the air resistance during traveling of the vehicle is reduced. In addition,
When the vehicle stops on the conventional line platform, the step plate 20 remains in the storage position PD.

In the above embodiment, the link member 3
0, link member 40, and link shafts J2, J
The part formed of 3, 3, and the like is a part that requires particularly high precision, but these constituent members are assembled in advance in a processing factory or the like to form one integrated link unit LU. The link unit LU is shipped to the vehicle factory after being sufficiently adjusted in the factory where it was assembled.

The link unit LU is assembled to the vehicle at the vehicle factory. In that case, the step plate 2
0 and is connected to the piston rod 50R of the cylinder device 50 attached to the body frame 10 in the space SP. The work of mounting the cylinder device 50 in the space SP is easy, and the work of mounting the link unit LU and adjusting the use position PU of the step plate 20 are also easy. Further, maintenance such as inspection, adjustment and replacement of parts at the time of failure is easy.

The left and right link members 30L, 30R,
Since the link members 40L and 40R are connected by the link shafts J2, J3, and J4, respectively, there is no need for centering, and the accuracy of the axial center position is guaranteed. However, these shafts J1, J2, J
Each of J3 and J4 may not be configured by one long shaft, but may be configured by a short shaft pin existing only in a portion where the link members 30L, 30R, 40L, 40R are provided. In particular, for the link shaft J4, it may be advantageous to use two short shaft pins in order to avoid interference with other members. When using two short shaft pins, connect each shaft pin to the connecting fittings 12L, R.
Therefore, the link members 40L and R may be rotatably supported at two positions, respectively, and the link members 40L and R may be rotatably fitted between them.

The cylinder device 50 is the clevis metal fitting J.
Since it is rotatably attached by 5, the swing range of the cylinder device 50 is widened, which is advantageous during assembly work and maintenance.

In the above embodiment, the step device 1
Was installed in the vehicle to temporarily close the gap between the entrance / exit floor and the platform, but it was installed in the elevator to temporarily close the gap between the floor of the elevator and the floor of each floor. It can also be used for plugging. In addition, it can be used for a door opening / closing device, a retractable workbench, stairs, a window, a chair, or the like.

The structure, shape, arrangement position, etc. of the whole or each part of the step device 1 can be appropriately changed in accordance with the gist of the present invention.

[0050]

According to the inventions of claims 1 to 4,
It has a relatively simple structure, operates smoothly, and is easy to manufacture and maintain.

According to the invention of claim 1 , since the load of the step plate is supported by the action of the rotation restricting member, it is safe and the rigidity is increased. According to the invention of claim 2 , it is possible to absorb the processing error of each part of the step device or the dimensional variation between the vehicle and the platform.

According to the third aspect of the invention, it is not necessary to align the first link member and the second link member provided at both ends, and the accuracy of the axial center position is guaranteed. Claim 4
According to the invention, the mounting work and the maintenance are easy.

[Brief description of drawings]

FIG. 1 is a front sectional view of a step device according to the present invention.

FIG. 2 is a plan view of a step device according to the present invention.

FIG. 3 is a diagram showing an operation of each member constituting the link unit.

FIG. 4 is an enlarged plan sectional view showing a part of each member constituting the link unit.

FIG. 5 is a front sectional view of a conventional step device.

FIG. 6 is a plan view of a conventional step device.

[Explanation of symbols]

1-step device 10 body frame 11 Contact part 20 step board 30 link member (first link member) 40 link member (second link member) 41 Rotation restriction member 50 cylinder device J1 step plate shaft (first rotation axis) J2 link shaft (second rotation axis) Shaft for J3 link (3rd rotation axis) J4 link shaft (4th rotation axis) J5 Clevis bracket (5th rotation axis) L1 straight line

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields investigated (Int.Cl. ⁷ , DB name) B61D 23/00-23/02 B60R 3/02 B61B 1/02

Claims (4)

(57) [Claims] 1. A step plate rotatably provided on a main frame between a use position in a horizontal state and a storage position retracted downward from the use position about a first rotation shaft. The step plate is arranged on the lower surface side thereof, and
A first link member rotatably provided about a turning shaft, one end of which is turnable with respect to the first link member about a third turning shaft, and the other end of which is with respect to the body frame A second link member rotatably provided about a fourth rotation shaft, and one end thereof rotatable about the third rotation shaft with respect to the first link member and the second link member. And a cylinder device, the other end of which is provided so as to be rotatable about a fifth rotation axis with respect to the main body frame, and the step plate is in a use position on the second link member.
At some point, touch the contact part provided on the body frame.
By touching, from the use position to the storage position
The second link member rotates in the same direction as the moving direction.
A rotation restricting member for restricting the rotation is provided, and the rotation restricting member is provided when the step plate is in the use position.
The step of contacting the member with the contact part
The load applied to the plate is applied to the first link member and the second lid.
Position of the third rotating shaft so that it is supported via a link member.
Is located below a straight line connecting the second rotation axis and the fourth rotation axis.
A step device characterized in that the step device is arranged on one side . Wherein said turn restricting member, the the rotation restricting member and the contact portion is configured to allow adjusting the inclination angle of the second link member when in contact with, claim 1, wherein Step equipment. 3. The second rotating shaft and the third rotating shaft are each one long shaft, and the first link member and the second link member are respectively the second rotating shaft. thus provided at both ends of the shaft and the third rotation shaft, the step apparatus according to claim 1 or claim 2. Wherein said second pivot axis, said third pivot axis, the fourth pivot shaft, said first link member, and said second link member is formed by a unit, according to claim 3, wherein Step equipment.