JP4234369B2 - Snow prevention device for sliding door for vehicle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a snow accretion prevention device that prevents snow from adhering to a sliding door for a vehicle such as a railway vehicle.
[0002]
[Prior art]
For example, in a railway vehicle, a simple sliding door is frequently used as a door for opening and closing an entrance. However, as shown in FIGS. 6 and 7, since there is a step 3 between the vehicle outer frame 1 and the sliding door 2 around the entrance / exit, when running in a snowy area, snowfall or snow S rolled up during running 8 adheres to the step 3 portion which is the rear of the traveling direction indicated by the arrow A, and freezes between the sliding door 2 and the vehicle outer frame 1 or falls on the floor 4 at the doorway, as shown in FIG. In addition, the sliding door 2 and the guide rail 5 may become clogged, resulting in a poor opening / closing of the sliding door 2. If the sliding door 2 becomes open / closed poorly, the restoration work takes time and it has a great influence on the diagram. Moreover, since it slips with the snow S which fell on the floor 4 of an entrance, a passenger's smooth boarding / alighting is prevented.
[0003]
For this reason, by heating the guide rail with a heater, it is intended to prevent the guide rail from freezing and to melt the snow that has fallen on the floor of the doorway. (For example, refer to Patent Document 1).
[0004]
[Patent Document 1]
Japanese Unexamined Patent Publication No. 2000-108897 (page 3, FIG. 7)
[0005]
[Problems to be solved by the invention]
However, in the above-described configuration, although snow on the floor portion of the entrance / exit can be prevented, it is not possible to prevent snow on the stepped portion between the upper part of the sliding door and other side portions and the vehicle outer frame.
[0006]
Therefore, the present invention provides a snow prevention device for a sliding door for a vehicle that suppresses snow accumulation on a stepped portion between the sliding door and a vehicle outer frame and prevents a sliding door from opening and closing when traveling in a snowy area. It is aimed.
[0007]
[Means for Solving the Problems]
In order to achieve the above-described object, a snow sliding prevention device for a sliding door for a vehicle according to the present invention is provided on a vehicle outer frame around a doorway of a vehicle that is opened and closed by a sliding door, and is expanded and contracted by supply and discharge of pressurized air. A snow sliding prevention device for a sliding door for a vehicle having a body and an air supply / discharge mechanism for supplying and discharging pressure air to and from the sac, wherein the sac is composed of a sac unit divided into a plurality of parts, Each sac unit can be independently inflated and deflated, and the air supply / discharge mechanism includes a main circuit including an air compressor, an air tank, and a pressure regulating valve. Branch to the unit circuit, each sac unit circuit is provided with a switching valve, and each switching valve is provided with a pipe connected to each of the plurality of sac body units. Sometimes the cyst unit is behind the direction of travel It is characterized in that a controller for actuating the control valve for supplying and discharging pressure air. Further, as a preferred embodiment, the capsular unit is, as viewed from the sliding door side, an upper left capsular unit disposed at the upper left portion of the vehicle outer side frame, a lower left capsular unit disposed at the lower left portion, and an upper right portion. from the right upper bladder unit disposed in, Rukoto consists of the lower right bladder unit positioned in the right lower front Ki嚢 body unit includes a tube in which the outer skin to be Mitsuke fluid is conducted It is configured, and at least one of the outer skin and the tube is formed of an elastic body.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment applied to a side sliding door of a railway vehicle according to the present invention will be described with reference to FIGS. The doorway 12 formed in the side structure 11 of the vehicle 10 is opened and closed by a sliding door 13. The vehicle outer frame 14 around the doorway 12 is formed obliquely so that the stepped portion 15 with the sliding door 13 becomes thinner toward the sliding door 13 in order to reduce the air resistance during traveling. 16 is disposed.
[0009]
The sac 16 includes an upper left sac unit 17 disposed at the upper left part of the vehicle outer frame 14, a left lower sac unit 18 disposed at the lower left part, an upper right sac unit 19 disposed at the upper right part, The lower right capsular unit 20 is arranged at the lower right.
[0010]
Each of the capsular units 17, 18, 19, and 20 includes an outer skin 21 to be seen and tubes 22 and 22 through which pressurized air is conducted. Each tube 22 is connected to a pipe from an air supply / discharge mechanism 23 mounted on the vehicle 10. The outer skin 21 and the tube 22 are formed of a flexible material, but either one or both of the outer skin 21 and the tube 22 may be formed of an elastic material such as rubber.
[0011]
The air supply / discharge mechanism 23 includes a main circuit 27 including an air compressor 24, an air tank 25, and a pressure adjustment valve 26. A left capsular unit circuit 28 and a right capsular unit circuit 29 are provided at the tip of the pressure adjustment valve 26. And are provided with switching valves 31 and 32 in both circuits 28 and 29, respectively, and pipes 33, which are connected from the switching valve 31 to the tube 22 of the left upper capsule unit 17 and the tube 22 of the left lower capsule unit 18, respectively. 34 is branched from the switching valve 32 to pipes 35 and 36 connected to the tube 22 of the right upper capsular unit 19 and the tube 22 of the right lower capsular unit 20, respectively. Each piping 33, 34, 35, 36 is provided with a pressure switch 37 for detecting an abnormal pressure and an opening cock 38. The pressure switch 37 is activated when the air pressure supplied to the capsular units 17, 18, 19, and 20 exceeds a limit value, and performs a burst protection operation of the capsular units 17, 18, 19, and 20.
[0012]
The main circuit 27 is connected to a pressure adjustment circuit 41 having a pressure regulator 40. The pressure regulator 40 operates the air compressor 24 when the pressure air supplied to each capsular unit is less than a specified pressure lower limit. When the specified pressure upper limit is reached, the operation of the air compressor 24 is stopped.
[0013]
Further, the main circuit 27 is provided with an operating circuit 43 having an electromagnetic valve 42 for operating the switching valve 31 and an operating circuit 45 having an electromagnetic valve 44 for operating the switching valve 32. The electromagnetic valves 42 and 44 are operated by a controller 46 to switch the switching valves 31 and 32.
[0014]
With this configuration, when the switching valves 31 and 32 are kept open during snowfall or running in a heavy snowy region, the sac units 17, 18, 19, and 20 are expanded to some extent by being supplied with pressurized air. In this state, for example, when traveling in the direction indicated by the arrow A in FIG. 1, the snow S adheres to the step portion 15 that is the rear of the traveling direction, so that the controller 46 controls the solenoid valve 44 in response to a general command from the cab. And the switching valve 32 is actuated to supply pressure air to the tube 22 of the right upper capsular unit 19 and the tube 22 of the right lower capsular unit 20, and the right upper capsular unit 19 and the right lower capsular unit 20. And inflate. As a result, the attached snow S does not expand and contract as much as the right upper capsular unit 19 and the right lower capsular unit 20, so that cracks occur around as shown in FIG.
[0015]
Next, when the preset time elapses, the controller 46 opens the switching valve 32 of the right upper capsular unit 19 and the right lower capsular unit 20, and each of the right upper capsular unit 19 and the right lower capsular unit 20 is opened. The compressed air in the tube 22 is exhausted, and the upper right capsular unit 19 and the right lower capsular unit 20 are contracted as shown in FIG.
[0016]
By repeating the expansion and contraction of the right upper capsular unit 19 and the right lower capsular unit 20 several times, the attached snow S cannot withstand the vibration given by the right upper capsular unit 19 and the right lower capsular unit 20. The right upper capsular unit 19 and the right lower capsular unit 20 are peeled off. Since the separated snow S is blown by the air flow during traveling, it is possible to prevent snow from reaching the vehicle outer frame 14 and the stepped portion 15.
[0017]
Further, since the snow S adheres to the left upper capsule unit 17 and the left lower capsule unit 18 during the turn-back operation, the controller 46 excites the electromagnetic valve 42 in accordance with a general command from the driver's cab in the same manner as described above. The valve 31 is actuated to expand the left upper capsule unit 17 and the left lower capsule unit 18, and after a predetermined time has elapsed, the switching valve 31 is opened to contract the left upper capsule unit 17 and the left lower capsule unit 18. By repeating the expansion / contraction of the capsular unit 17 and the left lower capsular unit 18 several times, the snow S attached to the left upper capsular unit 17 and the left lower capsular unit 18 can be peeled off as described above.
[0018]
Further, when the vehicle 10 is left outdoors for a long time on a snowy day, it snows on the capsule units 17, 18, 19, and 20 as shown in FIG. In this case, since the switching valves 31 and 32 are open as described above, the air supply / exhaust mechanism 23 is turned on and the switching valves 31 and 32 are operated so that the bladder units 17, 18, and 19 are operated. , 20 is expanded, the switching valves 31, 32 are opened after a lapse of a certain time, the capsular units 17, 18, 19, 20 are contracted, and this is repeated several times. Snow S adhering to 17, 18, 19, 20 can be peeled off.
[0019]
The operation of the air supply / discharge mechanism 23 is not limited to the general command from the driver's cab described above, but the controller 46 is operated to expand / contract the capsular units 17, 18, 19, 20; Expansion and contraction may be repeated at a constant cycle using a timer. Further, by making the outer skin 21 difficult to snow by applying fluororesin processing, a further effect of preventing snow accretion can be obtained.
[0020]
【The invention's effect】
As described above, according to the present invention, it is possible to prevent the sliding door from opening and closing poorly when traveling in a snowy area by suppressing snow accumulation on the stepped portion between the sliding door around the vehicle entrance and the outer frame. Can do.
[Brief description of the drawings]
FIG. 1 is a front view around a doorway of a vehicle showing an embodiment of the present invention. FIG. 2 is a circuit diagram of an air supply / discharge mechanism. FIG. 3 is a sectional view taken along the line III-III in FIG. Cross-sectional view of the state [FIG. 4] Cross-sectional view of the sac contracted in the IV-IV cross-sectional view of FIG. 1 [FIG. 5] Front view of the state where snow has fallen on the lower part of the doorway [FIG. FIG. 7 is a cross-sectional view taken along the line VII-VII in FIG. 6. FIG. 8 is a cross-sectional view in which snow is clogged between the sliding door and the guide rail.
DESCRIPTION OF SYMBOLS 10 ... Vehicle, 11 ... Side structure, 12 ... Entrance / exit, 13 ... Sliding door, 14 ... Outer side frame of entrance / exit, 16 ... Sac, 17 ... Upper left cyst unit, 18 ... Left lower cyst unit, 19 ... Upper right cyst unit 20 ... Right lower capsular unit, 21 ... Outer skin, 22 ... Tube, 23 ... Air supply / discharge mechanism, S ... Snow

Claims (4)

It has a bladder that is disposed outside of the vehicle frame around the entrance of the vehicle expands and contracts by the supply and discharge of compressed air which is opened and closed by the sliding door, and an air supply and discharge mechanism for supplying and discharging pressure air to該嚢body A snow sliding prevention device for a sliding door for a vehicle , wherein the sac is composed of a sac unit divided into a plurality of parts, and each sac unit can be independently expanded and contracted, and the air supply / discharge mechanism is A main circuit including an air compressor, an air tank, and a pressure regulating valve is branched into a plurality of capsular unit circuits at the tip of the pressure regulating valve, and each capsular unit circuit is provided with a switching valve, A pipe connected from the switching valve to each of the plurality of capsular units is provided, and the switching valve that supplies and discharges pressure air to the capsular unit that is rearward in the traveling direction during traveling is operated among the switching valves. It is characterized in that a controller Snow accretion prevention device of the sliding door for a vehicle. The capsular unit is, when viewed from the sliding door side, an upper left capsular unit disposed at the upper left part of the vehicle outer frame, a lower left capsular unit disposed at the lower left part, and an upper right capsular body disposed at the upper right part. unit and, accretion prevention device of the sliding door for a vehicle according to claim 1, wherein that you have been composed of a lower right bladder unit positioned in the right bottom. Before Ki嚢 body unit, the outer skin and snow accretion preventing apparatus for a vehicle sliding door according to claim 1 or 2, characterized in that said fluid is composed of the tube that is conductive to be found. 4. The snow sliding prevention device for a sliding door for a vehicle according to claim 3, wherein at least one of the outer skin and the tube is formed of an elastic body.

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