JP2004066883A - Snow adhesion prevention device for sliding door for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent difficulties in opening and closing of a sliding door when a vehicle runs in a heavy snow region by suppressing snow adhesion to a stepped part of the sliding door and a vehicle outer frame. <P>SOLUTION: A snow adhesion prevention device has bag bodies 17, 18, 19, 20 arranged in the vehicle outer frame 14 around an exit 12 of the vehicle 10 opened and closed by the sliding door 13 and an air supply and exhaust mechanism 23 for expanding/shrinking each bag body 17, 18, 19, 20 by supplying/exhausting air into/from each bag body 17, 18, 19, 20 to peel snow adhered due to expansion/shrinkage of each bag body 17, 18, 19, 20 in order to prevent snow adhesion. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a snowfall prevention device for preventing snow from attaching to a sliding door for a vehicle such as a railway vehicle.
[0002]
[Prior art]
For example, a railway vehicle often uses a simple sliding door as a door that opens and closes an entrance. However, as shown in FIGS. 6 and 7, since there is a step 3 between the outer frame 1 around the entrance and the sliding door 2, when traveling in a snowy area, snowfall or snow S which has been rolled up during traveling. Adheres to the step 3 behind the traveling direction indicated by the arrow A and freezes between the sliding door 2 and the outer frame 1 or falls on the floor 4 of the doorway, as shown in FIG. In addition, the sliding door 2 may be clogged between the sliding door 2 and the guide rail 5, resulting in poor opening and closing of the sliding door 2. If the sliding door 2 is not properly opened and closed, the recovery work is difficult and takes a long time, which has a large effect on the schedule. In addition, since the snow S falls on the floor 4 at the entrance and exit, the passengers are prevented from getting on and off smoothly.
[0003]
For this reason, some guide rails are heated by a heater to prevent the guide rail from freezing and to melt snow falling on the floor at the doorway. (For example, refer to Patent Document 1).
[0004]
[Patent Document 1]
JP-A-2000-108897 (page 3, FIG. 7)
[0005]
[Problems to be solved by the invention]
However, in the above-described configuration, although it is possible to prevent snow on the floor portion of the doorway, it was not possible to prevent snow on the upper portion of the sliding door or on the steps between the both side portions and the outer frame of the vehicle.
[0006]
Therefore, the present invention provides a snowfall prevention device for a sliding door for a vehicle, which suppresses snowfall on a stepped portion between the sliding door and a vehicle outer frame and prevents poor opening and closing of the sliding door when traveling in a snowy area. The purpose is.
[0007]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, a snow cover preventing 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 opened and closed by the sliding door, and expands and contracts by supplying and discharging fluid. And a mechanism for supplying and discharging the fluid to and from the capsule. Further, as a preferred embodiment, the cyst is composed of a plurality of divided cyst units, and each cyst unit can be independently expanded and contracted. And a tube through which the fluid is conducted, and at least one of the skin and the tube is formed of an elastic body.
[0008]
BEST MODE FOR CARRYING OUT 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. An entrance 12 formed in a side structure 11 of the vehicle 10 is opened and closed by a sliding door 13. The outer frame 14 around the entrance 12 is formed diagonally so that a step 15 with the sliding door 13 becomes thinner toward the sliding door 13 in order to reduce air resistance during traveling. 16 are provided.
[0009]
The sac 16 includes an upper left sac unit 17 arranged at the upper left of the vehicle outer frame 14, a lower left sac unit 18 arranged at the lower left, and an upper right sac unit 19 arranged at the upper right. And a lower right sac unit 20 arranged at the lower right.
[0010]
Each of the sac units 17, 18, 19, 20 comprises an outer skin 21 to be found, and tubes 22, 22 through which compressed air is conducted. Each tube 22 is connected to a pipe from an air supply / discharge mechanism 23 mounted on the vehicle 10. Although the outer cover 21 and the tube 22 are formed of a flexible material, one or both of the outer cover 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 having an air compressor 24, an air tank 25, and a pressure control valve 26, and a circuit 28 for the left sac unit and a circuit 29 for the right sac unit at the end of the pressure control valve 26. And a switching valve 31, 32 is provided in each of the circuits 28, 29, respectively, and piping 33, which is connected from the switching valve 31 to the tube 22 of the upper left capsule unit 17 and the tube 22 of the lower left capsule unit 18, respectively. The pipe 34 is branched from the switching valve 32 to pipes 35 and 36 connected to the tube 22 of the upper right capsule unit 19 and the tube 22 of the lower right capsule unit 20, respectively. Each of the pipes 33, 34, 35, 36 is provided with a pressure switch 37 for detecting abnormal pressure and a cock 38 for opening. The pressure switch 37 is activated when the air pressure supplied to each of the sac units 17, 18, 19, 20 exceeds a limit value, and performs a burst protection operation of the sac units 17, 18, 19, 20.
[0012]
Further, the main circuit 27 is connected to a pressure adjusting circuit 41 having a pressure regulator 40. The pressure regulator 40 operates the air compressor 24 when the pressure air supplied to each capsule unit falls below a specified pressure lower limit. When the pressure reaches the upper limit, the operation of the air compressor 24 is stopped.
[0013]
Further, the main circuit 27 is provided with an operation circuit 43 having an electromagnetic valve 42 for operating the switching valve 31 and an operation circuit 45 having an electromagnetic valve 44 for operating the switching valve 32. Each of the solenoid valves 42 and 44 is operated by the controller 46 to switch the switching valves 31 and 32.
[0014]
With this configuration, when the switching valves 31 and 32 are opened during snowfall or traveling in a snowy area, the bladder units 17, 18, 19 and 20 are supplied with pressurized air and expanded to some extent. In this state, for example, when the vehicle travels in the direction indicated by the arrow A in FIG. 1, snow S adheres to the step portion 15 that is located rearward in the traveling direction. And the switching valve 32 is actuated to supply compressed air to the tube 22 of the upper right capsule unit 19 and the tube 22 of the lower right capsule unit 20, and the upper right capsule unit 19 and the lower right capsule unit 20 are supplied. And inflate. As a result, the attached snow S does not expand and contract as much as the upper right sac unit 19 and the lower right sac unit 20, so that cracks are generated everywhere as shown in FIG.
[0015]
Next, the controller 46 opens the switching valve 32 of the right upper capsule unit 19 and the right lower capsule unit 20 when the preset time elapses, and sets each of the upper right capsule unit 19 and the lower right capsule unit 20 The pressurized air in the tube 22 is exhausted, and the upper right sac unit 19 and the lower right sac unit 20 are contracted as shown in FIG.
[0016]
By repeating the expansion and contraction of the upper right sac unit 19 and the lower right sac unit 20 several times, the attached snow S cannot withstand the vibration given by the right upper sac unit 19 and the lower right sac unit 20. Peel off from the right upper capsule unit 19 and the right lower capsule unit 20. Since the separated snow S is blown off by the airflow at the time of traveling, it is possible to prevent snow on the outer frame 14 and the step portion 15.
[0017]
In the turning operation, the snow S adheres to the upper left sac unit 17 and the lower left sac unit 18, and the controller 46 excites the electromagnetic valve 42 according to the general command from the cab as described above, and the switching is performed. By operating the valve 31, the upper left sac unit 17 and the lower left sac unit 18 are inflated, and after a certain period of time, the switching valve 31 is opened to contract the upper left sac unit 17 and the lower left sac unit 18, and By repeating the expansion and contraction of the sac unit 17 and the left lower sac unit 18 several times, the snow S attached to the upper left sac unit 17 and the lower left sac unit 18 can be removed in the same manner as described above.
[0018]
Furthermore, when the vehicle 10 is left outdoors for a long time on the day of snowfall, as shown in FIG. 5, snow accumulates on each of the sac units 17, 18, 19, and 20. In this case, as described above, since the switching valves 31 and 32 are open, the power supply of the air supply / discharge mechanism 23 is turned on, and the switching valves 31 and 32 are operated to operate the capsule units 17, 18, 19. , 20 are expanded, and after a certain period of time, the switching valves 31 and 32 are opened to contract each of the capsule units 17, 18, 19 and 20, and this is repeated several times. The snow S adhered to 17, 18, 19, 20 can be removed.
[0019]
The operation of the air supply / discharge mechanism 23 is not limited to the general command from the above-mentioned cab. The controller 46 may be operated to inflate and contract the capsule units 17, 18, 19, and 20, The expansion and contraction may be repeated at regular intervals using a timer. Further, by applying a fluororesin process to the outer cover 21 to make it harder for snow to accumulate, it is possible to further enhance the effect of preventing snow accretion.
[0020]
【The invention's effect】
As described above, according to the present invention, it is possible to suppress snow on a stepped portion between a sliding door around an entrance of a vehicle and an outer frame of the vehicle, and to prevent poor opening and closing of the sliding door when traveling in a snowy area. Can be.
[Brief description of the drawings]
FIG. 1 is a front view around an entrance 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 an enlarged view of a bag body taken along the line III-III in FIG. FIG. 4 is a cross-sectional view of the state in which the bladder is contracted in the IV-IV cross-sectional view of FIG. 1; FIG. 5 is a front view of a state in which snow is attached to the lower part of the doorway; FIG. FIG. 7 is a cross-sectional view taken along line VII-VII of FIG. 6; FIG. 8 is a cross-sectional view of a state where snow is clogged between a sliding door and a guide rail;
DESCRIPTION OF SYMBOLS 10 ... vehicle, 11 ... side structure, 12 ... doorway, 13 ... sliding door, 14 ... car outer frame of entrance, 16 ... sac, 17 ... left upper sac unit, 18 ... left lower sac unit, 19 ... upper right sac unit , 20 right lower capsule unit, 21 outer skin, 22 tube, 23 air supply / discharge mechanism, S snow

Claims (4)

A vehicle, comprising: a sac that is disposed on an outer frame around a doorway of a vehicle that is opened and closed by a sliding door and that expands and contracts by supplying and discharging fluid, and a mechanism for supplying and discharging fluid to and from the sac. Sliding door snow prevention device. The snow accretion prevention device for a sliding door for a vehicle according to claim 1, wherein the sac is composed of a plurality of sac units divided into a plurality of sac units, and each sac unit can be independently expanded and contracted. 3. The snow accretion prevention device for a sliding door for a vehicle according to claim 1, wherein the bladder or the bladder unit is configured by an outer skin to be found and a tube through which the fluid is conducted. 4. The snowfall prevention device for a sliding door for a vehicle according to claim 4, wherein at least one of the outer cover and the tube is formed of an elastic body.

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