JPS6358468B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a folding step device particularly suitable for use in railway vehicles.

BACKGROUND ART Conventionally, in railway vehicles, except for streetcars, passengers have boarded and alighted on high platforms installed therein. However, especially on local railways, the population density and frequency of use are low, which is the origin of various operational problems. Therefore, it is necessary to eliminate platform facilities and allow passengers to board and disembark anywhere, in order to secure passengers and improve service. is desired.

SUMMARY OF THE INVENTION An object of the present invention is to obtain a foldable step device that allows passengers to board and alight without a high platform.

According to the present invention, when the step is extended, it occupies a normal position to enable getting on and off, but when it is not needed, it is folded up into a compact state that does not get in the way. Note that the principle of the present invention can be used not only for railway vehicles but also for other vehicles and step devices for things other than vehicles.

Next, an embodiment of the present invention will be explained with reference to the drawings. In FIG. 1, 1 indicates the body of a railway vehicle, 2
indicate the respective carts. The truck 2 constitutes a support portion of the step device of the present invention. The truck 2 has a bracket 3 on its side, to which a first lateral fixed pivot 4 is attached.
is supported, and the base end of the first step 5 is rotatably supported by this pivot 4.

On the other hand, a second lateral fixed pivot shaft 6 is supported below the first fixed pivot shaft 4 and at a position away from the first fixed pivot shaft 4 with respect to the truck 2 serving as a support portion. The base end of the second step 7 is rotatably supported.

In the illustrated state, the first and second steps 5, 7
are both in horizontal positions that function as steps, and the tip of the first step 5 and the middle of the second step 7 are connected to the pin 5 by an interlocking link 8 in the vertical direction.
It is pivotally connected via a and 7a.

Another bracket 1 is attached to the trolley 2 as a support part.
0 is provided, to which a third lateral fixed pivot 11
is supported. This pivot 11 is above the first fixed pivot 4. And the third fixed axis 1
One end of a first operation link 12 is pivotally connected to 1,
One end of a second operating link 14 is pivotally connected to the other end by a pin 13, and the other end is pivotally connected to the middle of the second step 7 by a pin 15. 1st
and the second operating link constitute an operating link mechanism.

In the state shown in FIG. 1, both operating links 12 and 14 of the operating link mechanism are fully extended, and the second step 7
The first step 5 is prevented from lowering below the horizontal position, and the first step 5 is connected to the second step 7 via an interlocking link 8.
, and is similarly prevented from lowering below the horizontal position. Therefore, in this state both steps 5,
You can get on and off using 7.

An arm 17 is supported around the pivot shaft 11 so as to rotate integrally with the first operation link 12, and its tip is pivotally connected to the tip of a drive rod 20 of a drive source 19 by a pin 18. . Although the drive source 19 is an air cylinder in the illustrated example, any other drive source may be used. Drive source 19
is provided to avoid the position of the trolley 2.

To fold the step device from the usage state shown in FIG. 1, the drive source 19 is extended as shown in FIG. 2, and the arm 17 is rotated counterclockwise in the same figure. As a result, the first operating link 12, which is integral with it, rotates in the same direction around the pivot 11, so the operating link mechanism bends, and the second step 7
is pulled and rotated clockwise around its pivot 6. The rotation of the second step 7 causes the first step 5 to rotate in the same direction around its pivot 4 via the interlocking link 8.

When the drive source 19 is further extended, the operating link mechanisms 12 and 14 are further bent, and the second step 7 is further rotated, rising to a vertical position as shown in FIG. On the other hand, the first step 5 similarly rises to a vertical state via the interlocking link 8, and both steps 5 and 7 are folded under the vehicle 1 and stored along the truck 2. Along with this, the link mechanism 12,
14. The interlocking link 8 is located inside the outermost second step 7 and does not protrude outward. All members fall within the reduction limit L shown in FIG.

In order to bring the stair device stored as shown in FIG. 3 into use, it is sufficient to retract the drive device 19 in the opposite manner to that described above.

As described above, the step device of the present invention reliably forms a staircase shape when extended, and can be folded into a compact state along the side of the support, so it is especially useful for getting on and off in places where there is no platform. It is suitable for being applied to railway vehicles to enable this, and is useful in that it can be installed while adhering to the vehicle limits of railway vehicles. Furthermore, as mentioned at the beginning,
The present invention can also be applied to other than vehicles.

[Brief explanation of the drawing]

Fig. 1 is a side view of the foldable step device of the present invention in a state in which it is in use, Fig. 2 is a side view showing the device in the middle of folding, and Fig. 3 is a side view showing the device in the folded state. be. 2... Support part, 4... First lateral fixing axis,
5...First step, 6...Second lateral fixed pivot, 7...Second step, 8...Interlocking link, 11
...Third lateral fixed pivot, 12...First operation link, 14...Second operation link, 17...Arm, 19...Drive source.

Claims (1)

[Scope of Claims] 1. A first step whose proximal end is rotatably supported by a first lateral fixed pivot on the supporting part, and a first step below the first fixed pivot and with respect to the supporting part. a second step whose proximal end is rotatably supported relative to the support by a second lateral fixed pivot located apart from the fixed pivot; and rotation of the second step about the second fixed pivot. an interlocking link interconnecting the first and second steps such that the first step rotates about the first fixed pivot in conjunction with the first step; a first operating link whose one end is supported by a support portion by a direction-fixed pivot; and a second operating link whose one end is pivotally connected to the other end of the first operating link and the other end is pivotally connected to the second step. and a drive mechanism that rotates the first operating link around a third fixed axis, and the operating link mechanism is configured such that when both operating links are fully extended, the second step is in a horizontal position. and the interlocking link is configured to cause the first step to assume a horizontal position when the second step assumes a horizontal position. . 2. The folding device according to claim 1, wherein the drive mechanism includes an arm fixed to one end of the first operating link and a drive source that rotates the arm around a third fixed axis. Type step device. 3. The folding step according to claim 1 or 2, wherein one end of the interlocking link is pivotally connected to the tip side of the first step, and the other end is pivotally connected to the middle of the second step. Device.