JP2007203923A - Step device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a step device capable of reducing a shrinking volume of a cylinder device driving a step plate. <P>SOLUTION: Link mechanisms 3, 3 are arranged between a step plate 1 rotatably connecting to a deck part 21 of a vehicle body 20 and a bottom installation part 22 so as to actuate between a condition for suspending the step plate 1 in a vertical direction and an actuation condition for projecting the plate in a horizontal direction relative to the vehicle body 20. The respective link mechanisms 3 are rotatably connected with the step plate 1 by a second connection shaft 5, and with the installation part 2 by a third connection shaft 5. A cylinder device 11 is provided as a driving device for rotating the third connection shaft 5 via an actuation link 10. The cylinder device 11 is connected with the link mechanism 3 via the actuation link 10, so as to reduce its shrinking volume. Also, installation in a horizontal direction is not required, and so installation in a vertical direction can be realized. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a step device that is applied as a stepping aid when there is a step or a distance between the step and a step. In particular, the present invention relates to a step device suitable for use in rail vehicles and monorail cars.

  When a Shinkansen vehicle running on a conventional line stops on a Shinkansen platform, a vehicle with a narrow body width stops on a platform of a station that assumes a vehicle with a large body width, or a large curve is created. When the vehicle stops on the platform, a gap may be opened between the entrance of the vehicle and the edge of the platform. In addition, the position of the deck of the car body is often higher than the conventional platform, and there is a step between the entrance and exit of the vehicle and the platform. It is inconvenient and dangerous in some cases for passengers to get on and off in the presence of such gaps and steps. For this reason, it is desirable to project the step plate so as to be positioned from the vehicle body between the platform and the vehicle body deck.

  Therefore, a step device has been proposed as a device for temporarily closing such a gap to form a passage by protruding a step plate from the vehicle when the vehicle stops. The step device has a structure in which a step plate for placing a person or a baggage can be arranged at different positions when in use and at the time of storage. is there.

The conventional step device includes a step plate that protrudes from a vertically suspended state to a horizontal state with respect to the vehicle body, a first connecting shaft that connects the step plate and the vehicle body, and a second plate on the lower surface of the step plate. A first link connected via a connecting shaft, a second link connected to the first link via a third connecting shaft, and a fourth link connecting the second link to another position of the vehicle body. And a cylinder device for connecting the third connecting shaft and the vehicle body. When the cylinder device is protruded, the third connecting shaft connected to the cylinder device moves forward while being regulated by the second link, and is connected by the second connecting shaft via the first link. The plate is rotated from a state where it hangs vertically to a state where it protrudes horizontally.
Japanese Patent No. 3474434

  In the conventional step device, since the cylinder device is connected to the third connecting shaft, when the step plate is rotated between its operating position and the storage position, the third connecting shaft is It expands and contracts between the most retracted position corresponding to the retracted position of the plate and the most advanced position corresponding to the operating position of the step plate. When the expansion / contraction amount of the cylinder device increases, a large cylinder device is required. Further, the cylinder device must be extended in the horizontal direction, and the area occupied by the step device is large.

  Further, since the force from the cylinder device needs to be evenly distributed to the left and right third connecting shafts, the cylinder device needs to be installed at the approximate center of the left and right third connecting shafts, and the area occupied by the step device It is a factor to increase.

  As described above, the technical reason why the expansion / contraction amount of the cylinder device increases is that the third connecting shaft, which is an intermediate part of the link mechanism that rotates the step plate, not only rotates but also changes its position. The connecting shaft is one of the parts that are largely displaced during operation, and the output portion of the cylinder device is directly connected to the third connecting shaft. Then, when connecting the output part of a cylinder apparatus to the link mechanism for a step board operation | movement, there exists a problem which should be solved by the point connected with another part of the link mechanism in which the expansion-contraction amount of a cylinder apparatus becomes short.

  An object of the present invention is to reduce the size of a step device so that a small cylinder device can be adopted as a cylinder device that rotates a step plate between its operating position and a storage position.

  In order to achieve the above object, the present step device is connected to the vehicle body by a first connecting shaft, and is capable of rotating between a retracted state hanging vertically and an operating state projecting horizontally, A link mechanism rotatably connected to the lower surface of the step plate via a second connecting shaft and to the vehicle body via a third connecting shaft, and a drive device for operating the link mechanism The drive device is connected to an operating link connected to the second connecting shaft.

  According to the step device of the present invention, when the cylinder device is actuated to bring the step plate into the actuated state, the actuating link connected to the cylinder device is actuated in such a manner as to rotate around the second connecting shaft. The link mechanism that is rotatably connected by the connecting shaft is operated, and the step plate is rotated from the retracted state in which the step plate hangs vertically to the activated state that protrudes horizontally. Further, when the cylinder device operates in the reverse direction, the operation link and the link mechanism operate in the reverse direction, respectively, and the step plate returns to the retracted state and rotates. The expansion / contraction amount of the output part of the cylinder device, that is, the advance / retreat amount does not depend on the link mechanism but depends on the arm length of the operating link, so that a small cylinder device can be adopted as the cylinder. The apparatus can be miniaturized.

  An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a plan view showing an embodiment of a step device according to the present invention. 2 is a cross-sectional view taken along the line AA of FIG. 1, (a) is a cross-sectional view showing a state when the vehicle is running, (b) is a cross-sectional view in the middle from (a) to (c), and (c). FIG. 4 is a cross-sectional view of a state in which a step plate is projected horizontally. 3 is a cross-sectional view taken along the line BB of FIG. 1, (a) is a cross-sectional view showing a state when the vehicle is running, (b) is a cross-sectional view in the middle from (a) to (c), and (c). Is a cross-section with the step plate protruding horizontally. FIG. 4 is an enlarged view showing a main part of FIG. The embodiment shown in FIGS. 1 to 4 is an example in which the step plate protrudes at the same height as the deck. In FIG. 1, there are positions that cannot be seen on the deck or the step board, but these are partially cut away.

  1 to 3, the step plate 1 is a rectangular plate as a whole, and is formed by a first connecting shaft 2 that is disposed along the longitudinal direction of the vehicle with respect to the upper portion of the deck 21 of the entrance / exit of the vehicle body 20. It is connected so that it can rotate. FIG. 2A shows a state in which the step plate 1 is suspended by the first connecting shaft 2, that is, the step plate 1 hangs vertically with the side on which the step plate 1 is attached to the first connecting shaft 2 facing upward. It shows that it is in the stored state stored in the lower side. In order to operate the step plate 1 in the retracted state shown in FIG. 2 (a) to the horizontally projecting operation state shown in FIG. 2 (c), the step device has a pair of left and right ends of the step plate 1. The link mechanisms 3 and 3 are provided, and in the vicinity of the link mechanism 3 on one side (lower side in FIG. 1), the link mechanisms 3 and 3 are operated to place the step plate 1 between the retracted state and the activated state. A cylinder device 11 is provided as a common drive device to be driven by the motor. FIG. 2B is a state diagram between FIG. 2A and FIG. In addition, since the whole shape of the vehicle body is not shown in the drawings, a reference numeral of the vehicle body 20 is attached to a member that is a part of the vehicle body.

  Each link mechanism 3 is connected to the lower surface of the step plate 1 on one end side via the second connecting shaft 4 and connected to the installation portion 22 of the vehicle body 20 on the other end side via the third connecting shaft 5. Has been. Each link mechanism 3 includes a first link 6 connected to the lower surface of the step plate 1 via the second connection shaft 4, and a second link 7 connected to the installation portion 22 to the third connection shaft 5. The first link 6 and the second link 7 are connected to each other via a fourth connecting shaft 8 so as to be rotatable. The second link 7 is connected to the third connecting shaft 5 by welding (see w1, FIG. 4).

  Since the length of the second link 7 is set to be shorter than the length of the first link 6, when the second link 7 rotates around the third connecting shaft 5 during the operation of the link mechanisms 3, 3, Although the rotation trajectory of the four connecting shafts 8 becomes smaller, the first link 6 greatly changes the trajectory of the second connecting shaft 4 connected to the step plate 1 at the tip thereof, and enlarges the movement of the step plate 1. be able to.

  The third connecting shaft 5 is a long shaft extending between the link mechanisms 3 and 3, and is a single connecting shaft common to both the link mechanisms 3 and 3. Both ends of the third connecting shaft 5 are pivotally supported by the storage portion 22 by mounting legs 9 and 9. Each mounting leg 9 is pressed and fixed to the installation portion 22 by a bolt (not shown) from above.

  A cylinder device 11 is disposed at a close position offset in the axial direction of the third connecting shaft 5 with respect to one link mechanism 3. The cylinder device 11 is provided in common to the pair of link mechanisms 3 and 3. Corresponding to the cylinder device 11, the operating link 10 is connected to the third connecting shaft 5. The operation link 10 is connected to the third connection shaft 5 by welding (see w2, FIG. 4). The cylinder device 11 includes an output rod 14 that moves forward and backward with respect to the cylinder body 13, and the distal end portion of the output rod 14 is rotatably connected to the distal end portion of the operation link 10 via the fifth connection shaft 12. Has been. The cylinder device 11 is rotatably supported by a sixth connecting shaft 16 with respect to an attachment leg 15 attached to the installation portion 22 of the vehicle body 20. The longitudinal direction of the cylinder device 11, that is, the advancing / retreating direction of the output rod 14 faces the width direction of the vehicle body. According to the above structure, when the cylinder device 11 is operated, the link mechanisms 3 and 3 are operated from the output rod 14 via the fifth connecting shaft 12, the operating link 10, and further the third connecting shaft 5.

  As shown in FIG. 3, a support seat 23 is provided on the installation portion 22 on the vehicle body side, and is supported at the tip of the operation link 10 when the amount of rotation of the operation link 10 becomes larger than a predetermined amount. A screw 24 that contacts the seat 23 is provided. The screw 24 can adjust the contact allowance to the support seat 23 by screwing. The support seat 23 and the screw 24 function as a stopper that limits the rotation amount of the operation link 10, that is, the advancement amount of the output rod 14 of the cylinder device 11. When the cylinder device 11 is operated and the output rod 14 is advanced, the operation link 10 is rotated until a predetermined rotation amount in which the tip of the screw 24 is in contact with the support seat 23, but further rotation is a stopper function. Is blocked by. 3A corresponds to FIG. 2A, FIG. 3B corresponds to FIG. 2B, and FIG. 3C corresponds to FIG.

  In FIG. 4, a reinforcing plate 1 a is provided on the back surface of the step plate 1, and the first link 6 is connected to the reinforcing plate 1 a via the second connecting shaft 4. Since the second link 7 is welded to the third connecting shaft 5, when the third connecting shaft 5 rotates, the link mechanism 3 including the second link 7 operates simultaneously.

  In this configuration, when the cylinder device 11 is operated and the output rod 14 is advanced when the vehicle stops at the station, the operation link 10 rotates together with the third connecting shaft 5. The rotation of the third connecting shaft 5 is transmitted to the link mechanisms 3 and 3, and in each link mechanism 3, the second link 7, the fourth connecting shaft 8, the first link 6 and the second connecting shaft 4 are operated, The step plate 1 is driven around the first connecting shaft 2 so as to repel from the retracted state to the activated state, so that the step plate 1 is flush with the deck 21. Thereby, there is no gap between the deck 21 and the platform, and passengers can get on and off safely.

  In the above embodiment, the cylinder device 11 is connected to the operating link 10 via the fifth connecting shaft 12, so that a moment can be applied using the length of the arm of the operating link 10. The amount of expansion and contraction can be reduced.

  When the step plate 1 is in an operation state where it is flush with the deck 21, the operation link 10 is prevented from further rotation by a stopper function in which the support seat 23 and the screw 24 come into contact. At this time, in each link mechanism 3, the first link 6 and the second link 7 slightly exceeded the straight extension state indicated by the straight line 31 connecting the second connection shaft 4 and the third connection shaft 5. It is in a state (see FIG. 2 (c) and FIG. 3 (c)). In other words, each link mechanism 3 rotates to the lower position slightly beyond the dead point where the fourth connecting shaft 8 is located on the straight line 31. At this time, the step plate 1 occupies a position where the step plate 1 returns slightly more than the most repelled state around the first connecting shaft 2, but substantially protrudes horizontally.

  The load acting on the step plate 1 when the passenger gets in and out acts as a moment to rotate the step plate 1 in the direction to hang vertically around the first connecting shaft 2, but the operation of each link mechanism 3 is dead. Since the point is slightly beyond the point, the moment acts in each link mechanism 3 in a direction in which the fourth connecting shaft 8 is further away from the straight line 31 connecting the second connecting shaft 4 and the third connecting shaft 5. . However, the moment in this direction acts in the direction in which the tip of the screw 24 as a stopper abuts the support seat 23 more strongly in the operating link 10. For this reason, when the step plate 1 is in an operating state, the rotation center of the fourth connecting shaft 8 is below the straight line 31, and when the passenger gets on and off, the step plate 1 becomes unstable and retracts vertically. There is no inadvertent return to state. Thus, the link mechanism 3 constitutes a kind of toggle mechanism when the step plate 1 is in an operating state, and can stably support the load of the passenger. In order to return the step plate 1 to the original retracted state, the cylinder device 11 is operated with a large force such as a return force as a clear reverse operation, and the fourth connecting shaft 8 exceeds the dead point which is the position on the straight line 31. It is necessary to return to the original direction and rotate. When the cylinder device 11 moves the output rod 14 backward, even if the fourth connecting shaft 8 is positioned below the straight line 31 connecting the second connecting shaft 4 and the third connecting shaft 5, the second link 7 is moved. You can force it back over the dead point.

  FIG. 5 shows another embodiment of the step device according to the present invention. FIG. 5A is a longitudinal sectional view showing an operating state in which the step plate is protruded, and FIG. 5B is a longitudinal sectional view in which the step plate is stored when the vehicle is running. In the first embodiment, the cylinder device 11 that is a driving device is arranged horizontally, but in the second embodiment, the cylinder device 11 that is a driving device is arranged vertically. That is, the cylinder connected to the operating link 10 is connected to the second link 7 via the third connecting shaft 5 instead of moving the fourth connecting shaft 8 horizontally to project the step plate 1 horizontally. The device 11 may be installed vertically. Reference numeral 25 denotes a connecting seat that connects the seat of the installation portion 22 and the cylinder device 11.

  The step device according to the present invention is not limited to the above-described embodiment, and various modifications can be made. For example, the drive mechanism may be other than the cylinder device. As the drive source, besides a fluid type, a mechanical operation mechanism such as a rack or a ball screw, or an electric type using a motor may be used. Moreover, it can be used as a staircase by installing it upside down.

It is a top view which shows one Example of the step apparatus by this invention. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is an enlarged view which expands and shows the principal part of the step apparatus shown in FIG. It is explanatory drawing which shows the other Example of the step apparatus of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Step board 2 1st connection shaft 3 Link mechanism 4 2nd connection shaft 5 3rd connection shaft 6 1st link 7 2nd link 8 4th connection shaft 9 Mounting leg 10 Actuation link 11 Cylinder apparatus 12 5th connection shaft 13 Cylinder Main body 14 Output rod 15 Mounting leg 16 Sixth connecting shaft 20 Car body 21 Deck 22 Installation portion 23 Support seat 24 Screw 25 Connection seat

Claims (7)

A step plate that is connected to the vehicle body by a first connecting shaft and is rotatable between a vertically suspended state and a horizontally projecting state;
A link mechanism rotatably connected to the lower surface of the step plate via a second connecting shaft and to the vehicle body via a third connecting shaft;
A drive device for operating the link mechanism,
The drive device is connected to an operating link connected to the second connecting shaft;
A step device. The step device according to claim 1,
The link mechanism includes a first link connected to the lower surface of the step plate by the second connecting shaft, and is connected to the vehicle body by the third connecting shaft and connected to the first link by a fourth connecting shaft. Having a second link made,
A step device. The step device according to claim 2, wherein
The operating link is provided with a stopper that is in contact with the vehicle body and restricts a rotational operation amount thereof.
The step rotated from the retracted state in response to the fourth connecting shaft of the link mechanism occupying a position slightly beyond the dead center on the line connecting the second connecting shaft and the third connecting shaft. A plate occupies the operating state and the stopper abuts the vehicle body;
A step device. In the step apparatus of any one of Claims 1-3,
The link mechanism is arranged in a pair of forms on both end sides of the step plate,
The third connecting shaft of the pair of link mechanisms is formed on one common shaft,
The drive device is disposed in common to the pair of link mechanisms;
A step device. In the step apparatus of any one of Claims 1-4,
The drive device is horizontally disposed;
A step device. In the step apparatus of any one of Claims 1-4,
The drive device is arranged vertically;
A step device. In the step apparatus of any one of Claims 1-6,
The drive device is a cylinder device;
A step device.

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