The present invention relates to a railroad vehicle and a plug door for a railroad vehicle, and more particularly, to a railroad vehicle that efficiently moves a door to an airtight position and makes it possible to ensure the air tightness of the door without increasing the size of a cylinder device even when the door must be moved across a distance to arrive at the airtight position, and a plug door for a railroad vehicle.
Conventional railroad vehicles, particularly high-speed railroad vehicles include ones equipped with a plug door. The plug door has a door form such that the outer surface thereof is flush with the outer surface of a vehicle body when the doorway is closed. This plug door allows reductions in air resistance and noise such as wind noise.
Furthermore, as for an airtight maintaining device included in the plug door, Patent Literature 1 listed below discloses a configuration in which a piston rod of a cylinder device 4 is extended, thereby causing a link member 5 to turn and press a door 1 in a closed position toward airtight packing 3 so as to maintain the air tightness of the door 1.
Patent Literature 1: JP-A No. H09(1997)-11895
However, the airtight maintaining device disclosed in the above-described Patent Literature 1, the following problem has arisen when the door 1 in the closed position must be moved across a distance to arrive at an airtight position. That is, in that case, it is necessary to increase the size of the link member 5 and, accordingly, to increase the size of the cylinder device 4.
Accordingly, the present invention has been made in order to address the above-described problem, and an object of the present invention is to provide a railroad vehicle that efficiently moves a door to an airtight position and makes it possible to ensure the air tightness of the door without increasing the size of a cylinder device even when the door must be moved across a distance to arrive at the airtight position, and a plug door for a railroad vehicle.
The railroad vehicle according to the present invention offers the following advantages. That is, when a door is closed, the door is pressed by a second pressing device prior to being pressed by a first pressing device. The second pressing device is disposed to face an inner surface of the door and adapted to press the door toward a door frame. When a second piston is extended in a width direction of a vehicle body, the pressing member coupled to a leading end of the second piston abuts on the inner surface of the door and presses the door toward the door frame. Thus, the door is moved toward the door frame. In this manner, the second pressing device extends the second piston perpendicularly with respect to the inner surface of the door, and therefore it is possible to efficiently move the door toward the door frame without increasing the size of a cylinder device.
Thereafter, the door is pressed by the first pressing device. The first pressing device is disposed adjacent to the door in a longitudinal direction of the vehicle body and adapted to press the door toward the door frame. When a first piston is extended in the vehicle body longitudinal direction, a link mechanism operates and abuts on the inner surface of the door to press the door toward the door frame. In this manner, the first pressing device presses the door through the link mechanism, and therefore, even if an external force is applied from an outer surface of the door, not all external forces act on the piston. It is therefore possible to resist the external force and ensure the air tightness of the door without increasing the size of the piston. Consequently, there are the advantages of efficiently moving the door to an airtight position and making it possible to ensure the air tightness of the door without increasing the size of the cylinder device even when the door must be moved across a distance to arrive at the airtight position.
The railroad vehicle according another aspect of the present invention offers the following additional advantage. The first pressing device is disposed on the same level on both sides of the door so as to sandwich the door therebetween in the vehicle body longitudinal direction. The second pressing device is disposed on the same level on both sides of the door so as to sandwich the door therebetween in the vehicle body longitudinal direction. The first pressing device and the second pressing device are vertically alternately arranged. Thus, the door can be equally pressed. Therefore, there is the advantage of being able to ensure the air tightness of the door.
The railroad vehicle according another aspect of the present invention offers the following additional advantage. A blocking wall is provided in a manner protruding inward the vehicle on a door end side of the door. The blocking wall is disposed at a portion of the door on which the first pressing device or the second pressing device abuts, so as to surround that portion. Thus, it is possible to prevent, for example, a finger from being pinched between the inner surface of the door and the first pressing device or between the inner surface of the door and the second pressing device.
Furthermore, a door pocket opening the doorway and storing the door is provided with a shutter that opens and closes an entrance of the door pocket. A covering member is also provided at a leading end of the shutter for cover a portion through which the blocking wall passes while allowing passage of the blocking wall. Thus, even if the blocking wall is provided in a protruding manner on the door, the entrance of the door pocket can be covered. Therefore, there is the advantage of being able to prevent a finger from being pinched between the inner surface of the door and the first pressing device or between the inner surface of the door and the second pressing device due to, for example, the inadvertent entry of the finger from the portion through which the blocking wall passes.
The railroad vehicle according another aspect of the present invention offers the following additional advantage That is, a plug rail for guiding the door in movement in the vehicle body width direction extends between a first rail and a second rail. The first rail is suspended from a ceiling of the vehicle body and extends in the vehicle body longitudinal direction for guiding the door in reciprocal movement in the vehicle body longitudinal direction with respect to the doorway. The second rail is suspended from the ceiling of the vehicle body between the first rail and a side wall of the vehicle body and extends in the vehicle body longitudinal direction for guiding the door in reciprocal movement in the vehicle body longitudinal direction with respect to the doorway. In this manner, the plug rail is held at both ends by the first rail and the second rail. Thus, dangling of the leading end of the plug rail can be prevented. Therefore, there is the advantage of being able to reliably block the doorway and ensure the air tightness of the door.
The railroad vehicle according another aspect of the present invention offers the following additional advantage When the first piston is extended, the link member causes the arm to rotate about the rotary shaft, and the rotating roller turnably journaled to the leading end of the arm abuts the inner surface of the door and presses the door toward the door frame. In this case, even if an external force is applied from the outer surface of the door, the external force is distributed without acting directly upon the piston. Therefore, there is the advantage of being able to resist the external force and ensure the air tightness of the door without increasing the size of the piston.
A plug door for a railroad vehicle according to claim 6 offers the advantage of efficiently moving the door to an airtight position and making it possible to ensure the air tightness of the door without increasing the size of the cylinder device even when the door must be moved across a distance to arrive at the airtight position.
Hereinafter, a preferred embodiment of the present invention will be described with reference to the accompanying drawings.
The railroad vehicle 1 is provided with a first rail 2 extending in a vehicle body longitudinal direction (i.e., from the near side to the far side of the drawing sheet in
The plug rail 5 extends downwardly from the bearing fitting 4 and then is bent to extend toward a door 8. A rail 5a (see Portion A in
An L-shaped door-hanging fitting 7 is coupled to a lower surface of the moving member 6 so as to couple the moving member 6 and the door 8. The door 8 is provided integral with the moving member 6 through the door hanging fitting 7 so as to be movable in the vehicle body width direction (i.e., in the horizontal direction in
A second rail 9 is provided parallel to the first rail 2 in the vehicle longitudinal direction above the leading end side (door 8 side) of the plug rail 5 (see
Furthermore, as shown in
Furthermore, a guide passage 12 is coupled to the other surface (the right side surface in
As shown in
Furthermore, a coil spring 16 is inserted on each of the two shafts 13 on the opposite side across the slide member 14 from the door 8 so as to urge the slide member 14 toward the door 8. Thus, the rotating roller 15 travels while separating the door 8 from the wall surface when passing through the inside of the guide passage 12, and can also move smoothly from the straight passage to the bent passage of the guide passage 12.
Further, as shown in
Therefore, the telescopic motion of the rod 18 allows the bearing fitting 4, the plug rail 5 coupled to the bearing fitting 4, the moving member 6 coupled to the plug rail 5, the door hanging fitting 7, the door 8, and the block piece 11 to reciprocate in the vehicle body longitudinal direction. It should be noted that the shafts 13, the slide member 14, and the rotating roller 15 are also allowed to reciprocate in the vehicle body longitudinal direction through the door hanging fitting 7.
In contrast, as shown in
As shown in
It should be noted that, in
That is, the three main pressing devices 40 and the two auxiliary pressing devices 30 are alternately provided on the left side. Also in the same manner, the three main pressing devices 40 and the two auxiliary pressing devices 30 are alternately provided on the right side. Thus, it is possible to equally press the door 8 against the door frame and to ensure the air tightness.
Next, referring to
The auxiliary pressing device 30 is adapted to further move the door 8′ indicated by the two-dot dash line in
When the door 8 is moved to the position 8′ indicated by the two-dot dash line in
Moreover, a blocking wall 8b that surrounds the portion of the door 8 on which the pressing member 33 abuts is provided inward the vehicle on an inner surface (on the door end side) of the door 8. Thus, an accident, such as pinching a finger between the pressing member 33 and the inner surface of the door 8, can be prevented. It should be noted that a gap between the leading end of the blocking wall 8b and the obliquely-extending wall surface is of a size so that the finger does not enter the gap.
The main pressing device 40 is provided with an air cylinder 41 and a piston that telescopes in the vehicle body longitudinal direction from the air cylinder 41. The main pressing device 40 is also provided with: a rotary shaft 42 coupled to the inner surface of the vehicle body side wall and extending vertically; an arm 43 journaled to the rotary shaft 42 and extending inward the vehicle, a leading end thereof being bent toward the inner surface of the door 8; a rotating roller 44 turnably journaled to the leading end of the arm 43; and a link member 45 having one end that is rotatably coupled to the leading end of the piston and the other end that is rotatably coupled to the arm 43. It should be noted that the leading end of the piston is provided with a rotary shaft and the one end of the link member 45 is coupled to the rotary shaft. Furthermore, the arm 43 is mounted to the rotating roller 44 and the link member 45 in such a manner as to be rotatable on the rotary shaft.
With the main pressing device 40, when the piston is extended in the vehicle body longitudinal direction, the link member 45 causes the arm 43 to rotate about the rotary shaft 42, and the rotating roller 44 turnably journaled to the leading end of the arm 43 abuts the inner surface of the door 8 and presses the door 8 toward the door frame W. In this case, even if an external force is applied from the outer surface of the door 8, the external force is distributed without acting directly upon the link member 45 and the piston. It is therefore possible to resist the external force and ensure or maintain the air tightness of the door 8 without increasing the size of the cylinder 41.
That is, if the main pressing device 40 and the auxiliary pressing device 30 are operated in reverse order, the main pressing device 40 cannot move the door 8 over a long distance. In order to move the door 8 over a long distance, it is necessary to increase the size of the arm 43, and, accordingly, also to increase the size of the cylinder. Furthermore, it is necessary to increase the size of the cylinder 31, because the external force acts directly upon the piston 32 in the auxiliary pressing device 30.
As described above, causing the main pressing device 40 and the auxiliary pressing device 30 to work in reverse order leads to an increase in the size of the cylinder device. However, according to the aspect of this embodiment, there is no need to increase the size of the cylinder device. In this manner, according to this embodiment, it is possible to efficiently move the door 8 to an airtight position and ensure or maintain the air tightness of the door without increasing the size of the cylinder device even when the door 8 must be moved across a distance to arrive at the airtight position.
As shown in
In contrast, when the door 8 is stored in the door pocket T as shown in
Therefore, in this embodiment, the portion of the leading end 51 of the opening/closing door 50 through which the blocking wall 8b passes is made of rubber or a brush. Thus, even if the blocking wall 8b is provided in a protruding manner on the door 8, the entrance T1 of the door pocket T can be covered. It is therefore possible to prevent, for example, the inadvertent entry of a finger from the portion through which the blocking wall 8b passes.
While an embodiment of the present invention has been described above, the present invention is by no means limited to the above embodiment, and it is obvious that various modifications may be made without departing from the scope of the present invention.
Number | Date | Country | Kind |
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2012-255745 | Nov 2012 | JP | national |
Filing Document | Filing Date | Country | Kind |
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PCT/JP2013/079605 | 10/31/2013 | WO | 00 |
Publishing Document | Publishing Date | Country | Kind |
---|---|---|---|
WO2014/080736 | 5/30/2014 | WO | A |
Number | Name | Date | Kind |
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3636658 | Bollinger, Sr. | Jan 1972 | A |
4087939 | Elguindy | May 1978 | A |
4438595 | MacDonald | Mar 1984 | A |
4669220 | Dilcher | Jun 1987 | A |
4924625 | Dilcher | May 1990 | A |
5140770 | Morvan | Aug 1992 | A |
5142823 | Brandenburg | Sep 1992 | A |
5263280 | Dilcher | Nov 1993 | A |
5483769 | Zweili | Jan 1996 | A |
5893236 | Krbec | Apr 1999 | A |
6385910 | Smink | May 2002 | B1 |
6539669 | Heidrich | Apr 2003 | B1 |
6792717 | Carlsson | Sep 2004 | B2 |
7426803 | Fronz | Sep 2008 | B2 |
8001908 | Webster | Aug 2011 | B2 |
8950115 | Andersson | Feb 2015 | B2 |
Number | Date | Country |
---|---|---|
S51-160308 | Dec 1976 | JP |
H04-41458 | Apr 1992 | JP |
H09-11895 | Jan 1997 | JP |
2008-174151 | Jul 2008 | JP |
Entry |
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Jan. 21, 2014 International Search Report issued in International Patent Application No. PCT/JP2013/079605. |
Number | Date | Country | |
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20150321677 A1 | Nov 2015 | US |