JPH06305418A - Plug door device - Google Patents

Abstract

PURPOSE:To minimize the clearance between a door and a door front rail by forming the door front rail in a projected shape, and by forming a guide member at the lower part of the door on the door front side in a recessed shape so as to engage with the door front rail and also forming it in parallel with the door in such a way that when the door has been entirely closed, it makes an acute angle with the door front rail. CONSTITUTION:A door 3 is provided to the entrance 2 of a vehicle body 1 so as to be flush with the side surface of the vehicle body 1, and an upper rail 4 is provided above the entrance 2, and a door front rail 5 and a door rear rail 6 are provided below the entrance. The upper rail 4 and the door front rail 5 are provided on a straight line that make an acute angle alpha(not shown) with the door 3 when the door has been completely closed, and the door rear rail 6 has a curved part and is provided so as to be parallel with the side surface of the vehicle body 1. The upper rail 4 is connected to the door front upper part via a connecting part 9, and the door front rail 5 and the door rear rail 6 are connected to the door front lower part and the door rear lower part via guide members 7, 8 respectively. The door front rail 5 is formed in a projected shape, and the guide member 7 is formed in a recessed parallel projection capable of being engaged with the door front rail 5, and the parallel projection is formed in such a way that when the door 3 has been completely closed, it makes an acute angle alpha with the door front rail 5, and that it insertedly holds the door front rail 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plug door device for pushing a door provided at an entrance of a vehicle body of a railway vehicle or the like toward a vehicle body and opening and closing the door along a side surface of the vehicle body.

[0002]

2. Description of the Related Art As a plug door device of this type, one disclosed in British Patent 1482981 is known.
In order to open and close the door along the side of the vehicle body, an upper rail is provided above the elevator door, and a door tip rail is provided below the elevator door. There is a Tojiri rail. Then, in order to push the door provided at the entrance of the vehicle body flush with the side surface of the vehicle body to the outside of the vehicle, and to open and close along the side surface of the vehicle body,
The upper rail and the door end rail are arranged at an acute angle so that the door butt side approaches the door front side toward the elevator door, and the door end side of the door butt rail has a curved portion directed to the elevator door. The upper part of the door end side is engaged with this upper rail via a connecting part such as a roller,
The lower part of the door end side is engaged with the door end rail through a guide tool such as a roller, and the lower part of the door tail side is engaged with the door end rail through a guide tool such as a roller. It has a structure that supports the opening and closing of the door with the Tojiri rail. Further, the connecting part is connected to a drive part such as a door engine for opening and closing the door.

In the plug door device having such a structure, the door extending from the side surface of the vehicle body toward the entrance / exit is guided by the upper rail, the door edge rail and the door trail rail when fully closed, and the side surface and the surface of the vehicle body at the entrance / exit of the vehicle body. It is in a uniform state and has a structure in which it is in close contact with the entrance / exit through the seal member. Therefore, it is generally known as a door device that does not require a door pocket and has good airtightness.

In the plug door device described above, the door end rail is provided at the lower edge of the entrance / exit. In the plug door device disclosed in British Patent 1482981, the door rail 120 as shown in FIG. 12 is provided at the lower edge of the entrance / exit. The door rail 120 is formed as an inverted T-shaped groove on the floor surface 124 at the lower edge of the entrance 121 of the vehicle body 104. Further, a roller 123, which is rotatable in the horizontal direction, is pivotally supported on the tip of a bracket 122 that hangs from the lower portion of the door 101. The roller 123 is positioned in the inverted T-shaped groove of the door-end rail 120 and guides and supports the lower part of the door 101 on the door-end side while restricting the horizontal direction in the drawing.

[0005]

However, the floor surface 1
Since the inverted T-shaped groove formed in 24 serves as the door-end rail 120, a gap is always created between the door-end rail 120 and the roller 123, and when the vehicle is passing at a high speed as the vehicle passes each other. In addition, when the wind pressure increases when entering a tunnel, there is a problem that it is impossible to prevent vibration of the door and entry of draft air from the side seal portion.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a plug door device capable of minimizing a gap between a door and a door end rail.

[0007]

In order to achieve the above object, the plug door device of the present invention is configured such that a door provided at an entrance / exit of a vehicle body so as to be flush with a side surface of the vehicle body is pushed out to the outside of the vehicle body, A plug door device that opens and closes along a door, an upper rail provided above the entrance / exit, a door tip rail provided below the door, and a door extending in parallel to the door tip rail from the door butt side of the door to the vehicle body side surface. Has a butt rail,
The upper rail and the door edge rail are parallel to each other and are provided on a straight line that forms an acute angle with the door when the door is fully closed, and the door butt rail has a curved portion that curves the door butt side in the vehicle inward direction. And the upper rail is engaged with the upper part of the door on the door tip side through a connecting portion, and the rails on the door tip and the tail rail are on the lower side of the door tip on the door and A plug door device which is engaged with a lower part of the door sill side via a guide and which supports the opening and closing of the door with the upper rail, the door tip rail, and the door sill rail, in which the door tip rail projects from the floor surface of the vehicle body. The guide tool provided on the lower part of the door on the door tip side is provided as a concave parallel protrusion that engages with the door tip rail, and the parallel protrusion forms the acute angle with the door tip rail when the door is fully closed. Formed in a direction parallel to the door and when the door is fully closed It is to sandwich the door head rail.

[0008]

[Function] During the process of opening and closing the door, the lower part of the door on the door tip side opens and closes along the acute angle of the door tip rail, so that the parallel protrusions of the door tip rail and the door are substantially parallel, and the door is opened and closed smoothly. . When the door is fully closed, the door and the side surface of the vehicle body are flush with each other at an acute angle with the door tip rail, so that the door tip rail is sandwiched by the parallel protrusions of the door, and the gap is eliminated.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a front view of the plug door device of the present invention, and FIG. 2 is a sectional view taken along the line AA of FIG. First, the entire plug door will be described with reference to FIGS. 1 and 2, and then the respective parts will be described in detail.

In FIG. 1, 1 is a vehicle body, 2 is an entrance / exit, and 3
Is a door, 4 is an upper rail, 5 is a door end rail, 6 is a door end rail, 7 is a door end side lower guide, 8 is a door end lower guide, 9 is a connecting part, 10 is a drive part, Reference numeral 11 is an upper retracting device on the side of the door, and 12 is a lower retracting device on the side of the door.

The drive unit 10 has a front end of a door engine 20 connected to a belt 23 wound around a first pulley 21 and a second pulley 22, and a third pulley 2 coaxial with the first pulley 21.
The connecting portion 9 is connected to the belt 26 wound around the fourth pulley 4 and the fourth pulley 25. When the door engine 20 extends, the belt 26 accelerated by the diameter ratio of the first pulley 21 and the third pulley 24 causes the connecting portion 9 to travel along the upper rail,
Door 3 opens.

The door 3 in FIG. 1 is engaged with the upper rail 4 at the connecting portion 9 on the upper side of the door tip side, and is engaged with the door tip rail 5 with the guide tool 7 at the lower side of the door tip side. The guide tool 8 engages the door-end side rail 6, and the door engine 10 connected to the connecting portion 9 causes the door engine 10 to change from a closed position indicated by a solid line (a position where the entrance 2 is closed) to an open position indicated by a chain double-dashed line (a side of the vehicle body 1 Position) to open and close. Figure 2
As clearly shown in FIG. 3, the door 3 in the fully closed position is flush with the side surface of the vehicle body 1 at the entrance / exit 2, but the door in the fully opened position is pushed out to the outside of the vehicle body 1 and positioned on the side surface. is doing.

Next, the structure of the door end rail 5 and its guide tool and the door butt rail 6 and its guide tool 8 which are flush with the side surface of the vehicle body 1 in the fully closed position and are located on the outer side surface in the fully open position. Will be described with reference to FIGS. In FIG. 3, the door-end rail 5 is provided on the vehicle body floor surface of the entrance / exit 2 of the vehicle body 1, has a substantially rectangular cross section, and has a convex shape in relation to the vehicle body floor surface 2a. It has an inclination of an acute angle α inside the vehicle body 1. The door butt rail 6 is provided so as to extend from the door butt side of the door 3 to the side surface of the vehicle body 1, and has a linear portion 6a and a curved portion 6b. That is, the door end side of the door 3 is gradually pushed out of the vehicle body 1 along the door end rail 5, but the door end side of the door 3 follows the curved portion 6b of the door end rail 6 in the final step of door closing. And is pushed out of the vehicle body 1 rapidly.

In FIG. 4, which is a sectional view taken along line CC of FIG. 3 and shows the door fully closed, the door-end rail 5 is a floor surface 2a of the vehicle body 1.
It is fixed in a protruding shape. The guide tool 7 at the lower part of the door tip side has a concave shape fixed to the lower end of the door 3 and has parallel projections 33 and 34. The parallel protrusions 33 and 34 are provided in parallel with the door 3, and when fully closed as shown in the figure,
The front end rail 5 is inclined at an acute angle α with the corner B of the parallel protrusion 33 and the corner C of the parallel protrusion 34.
Is sandwiched between. In addition, 95 is the door-end side floor surface 2a of the entrance / exit
96 is a door detachment prevention member that is fixed to the
Is a rain protection member fixed to substantially the entire length of the entrance / exit floor surface 2a (see FIG. 3). Next, in FIG. 5 which is a cross-sectional view taken along the line I-I of FIG. 3 and shows the door fully closed, the vicinity of the terminal end of the door tip rail 5 extends to above the projecting portion 1 a of the vehicle body 1.
The front end of is open parallel to the side surface of the vehicle body 1. Even when fully opened, the parallel protrusions 33 and 34 and the door-end rail 5 are inclined at an acute angle α, and the corner B of the parallel protrusion 33 and the corner C of the parallel protrusion 34 sandwich the door-end rail 5.

In FIG. 6, which is a sectional view taken along line DD of FIG.
The door sill rail 6 is fixedly provided in the lateral recess of the lower frame body 36 of the vehicle body 1, and has an upper guide groove 37 and a lower guide V groove 3.
8 and. The trailing edge side guiding tool 8 is such that an upper roller 40 and a lower roller 41 are rotatably supported at the tip of a laterally projecting portion 39a of a connecting member 39 embedded in the door 3. The upper roller 40 enters the upper guide groove 37 and is regulated and guided in the left-right direction in the drawing. The lower roller 41 has an upper conical portion 41a and a lower conical portion 41b. The upper and lower conical portions 41a and 41b enter the lower guide V groove 38 and are regulated and guided in the vertical direction in the drawing.

Similarly, the structure of the upper rail 4 and the connecting portion 9 will be described with reference to FIGS. 7 and 8. In FIG. 7, the upper rail 4 is a slide rail, and like the door-end rail 4 in FIG. 3, the door-end side is provided with an inclination angle α into the vehicle body 1. In FIG. 8 which is a cross-sectional view taken along the line FF of FIG. 7, the upper rail 4 is fixed to the frame body 45 in the vehicle body 1. The connecting portion 9 includes an L-shaped bracket 46 in a side view,
The spherical bearing 47 and the slide member 48 are the main parts. The bracket 46 is fixedly installed inside the upper portion of the door 3, and the spherical bearing 47 includes a movable spherical portion 47a and a fixed spherical seat portion 4.
7b, is fitted in a lateral hole 46a provided in the tip portion of the bracket 46, the spherical surface portion 47a is fixed to the stepped shaft 48a by the contact plate 49a, and the spherical seat portion 47b is in contact with the contact plate 49b.
It is fixed to the bracket 46 with. Slide member 48
Is fitted to the upper rail 5 and slidable in the thickness direction of the drawing, and a stepped shaft 48a protruding laterally is fitted in a through hole 47c of the spherical portion 47a of the spherical bearing 47 and fixed by a nut 50. Further, the second bracket 51 is sandwiched between the nut 50 and the contact plate 49a, and the upper end horizontal part thereof is connected to the belt 26 of the drive part.

Next, a procedure for assembling the plug door device having the above structure will be described below. In FIG. 1, an upper rail 4 and a drive unit 10 are attached to an upper portion of a vehicle body 1, and a door tip rail 5 and a door trail rail 6 are attached to a lower portion of the vehicle body 1.
Then, the guide tools 7, 8 attached to the door 3 are fitted into the door-end rail 5 and the door-end rail 6. Next, the connecting portion 9 of FIG. 1 is assembled. The bracket 46 in which the spherical bearing 47 of FIG. 8 is fitted is inserted into the stepped shaft 48 a of the slide member 48. The car body 1 and the door 3 are processed by sheet metal, and the dimensional accuracy is not so good. The dimensional difference in the height direction, the front-rear direction, and the left-right direction can be absorbed by the elongated holes of the bolt tightening parts c and d of the bracket 46, but the inclination in the height direction, the front-rear direction, and the left-right direction is the bolt tightening part c. , D cannot be absorbed. But,
The spherical bearing 47 allows the bracket 46 to be tilted in any direction around the point A. Therefore, it is possible to assemble the vehicle body 1 and the door 3 with minimal sheet metal modification, and the number of assembly steps can be reduced. In addition, an unreasonable force is not generated during the sliding traveling of the upper rail 4 as the slide rail and the sliding member 48, and smooth traveling is secured.

The opening / closing operation of the plug door device assembled as described above will be described with reference to FIG. When the door engine 20 extends leftward in the drawing, the belt 26 travels rightward in the drawing, and the connecting portion 9 also slides rightward in the drawing along the upper rail 4. Further, the guide tool 7 on the lower side of the door tip side is guided along the door tip rail 5, and the guide tool 8 on the lower side of the door tail side is also guided along the door tail rail 6. As shown in FIG. 3, the door butt rail 6 has a curved portion 6b, and the door butt side of the door 3 is pushed out to the outside of the vehicle body 1 in the initial stage of door opening. Since the door end rail of FIG. 3 and the upper rail of FIG. 7 are inclined at an angle α, they are gradually pushed out to the opposite side of the vehicle body 1 in the entire process of the door opening operation, and finally along the side surface of the vehicle body 1. Fully open position.
By the way, in FIG. 3A showing the positional relationship between the guide tool 7 at the lower part of the door tip side and the door tip rail 5, when the door 3 is flush with the side surface of the vehicle body 1, the guide tool 7 is closed. Parallel projection 3
3, 34 hold the door-end rail 5 therebetween. Therefore, there is no gap between the door-end rail 5 and the guide tool 7, and even if the wind pressure is high, such as when the vehicle is crossing at high speed or when entering a tunnel, the door 3 vibrates, Draft does not enter. However, when the door 3 starts to open, the door butt side is suddenly pushed out, and the door 3 itself is shown in FIG.
As described above, it has the same inclination of the acute angle α as the Tojiri rail, and the acute angle α gradually decreases. That is, during the opening and closing of the door 3, the door butt rail 5 and the parallel protrusions 33,
34 is substantially parallel and opens and closes smoothly. The door 3
When the door is fully opened, the door rail 5 has parallel projections 3 as well as when it is fully closed.
Although it is sandwiched by 3, 34, the end of the door-end rail 5 may be made substantially parallel to the side surface of the vehicle body 1 to have a gap.

Further, as shown in FIG. 6, the upper guide groove 37 and the upper roller 40 in the guide tool 8 at the lower part of the door tail side restrict the backlash of the door 3 in the left-right direction in the drawing. In addition, the lower guide V groove 38 and the lower conical portion 41b of the lower roller 41.
Due to this, the downward movement of the door 3 due to its own weight is restricted. Due to these restrictions, the door 3 can be smoothly opened and closed without play.

Further, in FIG. 1, when the door 3 is closed, a person or luggage may be caught between the door 3 and the entrance / exit 2 of the vehicle body 1. By the way, the spherical bearing 4 as shown in FIG.
Since 7 is provided, the door 3 is centered around the point A in FIG.
A moment is generated that tries to rotate the counterclockwise. Therefore, the lower part of the door 3 on the side of the door is about to rise. If the lower part of the door buttocks side floats up, the door 3 may be twisted and the closing operation may stop. However, as shown in FIG. 6, the door tail rail 6 has a lower guide V groove 38, and the upper cone portion 41a of the lower roller 41 of the guide tool 8 at the lower part of the door tail side.
Since the lifting of the door 3 is restricted by the engagement of the lower guide V groove 38 with the lower guide V groove 38, even if a person or luggage is caught in the door 3 when a spherical bearing is used for the connecting portion 9 in FIG. The 3 is lifted up and won't twist.

By the way, the door 3 in FIG. 1 has a connecting portion 9 on the upper side of the door tip, a guide tool 7 on the lower side of the door tip, and a guide tool 8 on the lower side of the door tail side.
Since it is supported at three points, there is a risk of rattling at the free upper part of the door butt side. Therefore, the upper retracting device 11 is provided on the side of the door. This upper retractor 11 is shown in FIG.
Will be described.

FIG. 9A is a top view, FIG. 9B is a side view, and FIG. 9C is an operation view. 1A and 1B, the upper retraction device 11 includes a base 55, a rotary shaft 56, a retraction cam 57, a timing cam 58, a switching valve 59, a speed adjustment valve 60, and a retraction cylinder 61 as main parts. It is fixed to the frame frame side surface at the edge of the entrance / exit 2 of the vehicle body 1. Further, a recess 62 is formed at a position facing the retracting cam 57 on the upper part of the door 3 on the door tail side, and a pin 63 is provided so as to cross the recess 62 vertically.

The rotary shaft 56 is rotatably provided on the base 55, and the timing cam 58 and the retracting cam 5 are mounted on the rotary shaft 56.
9 is inserted and fixed. A tip roller 59b of a lever 59a of a switching valve 59 is urged to abut on the timing cam 58 in a contact state. The tip roller 59b is the timing cam 5
8 moves from the small diameter portion 58a to the large diameter portion 58b, the lever 59a swings clockwise, the switching valve 59 switches, and pressurized air is supplied in the shortening direction of the retracting cylinder 61 via the speed control valve 60. .

The retracting cam 57 includes a first pawl 57a and a second pawl 5
The arm 57c, which has 7b and is opposite to the claws 57a and 57b, is pin-connected to the tip of the rod 61a of the retracting cylinder 61. In the final step of closing the door, the tip end of the door is curvedly moved as shown by an arrow e in FIG. 7C, the pin 63 of the door 3 is also curvedly moved as shown by an arrow f, and the first claw 57a longer than the second claw 57b is firstly moved. Hit the pin 63. The tip of the second pawl 57b in FIG. 11A is a hook shape that is bent counterclockwise in the circumferential direction of the rotating shaft 56, and when the retracting cylinder 61 urges the retracting cam 57 to rotate clockwise, the same figure is used. As shown in (c), the pin 63 is pulled toward the vehicle body 1.

In the retracting cylinder 61, a spring is built in the cylinder side chamber, and when the rod side chamber is in communication with the atmosphere, the rod 61a is extended by the spring, and the retracting cam 57 shows the retracting cam 57 in the solid line in FIG. Is released. Switching valve 5
When the pressurized air is supplied to the rod side chamber via the speed control valve 60 by 9, the rod 61a is shortened and the retracting cam 57 is in the operating state shown by the solid line in FIG.

Next, the operation of the above-described upper retractor 11 will be described. In the door open state of FIG. 6A, the rod side chamber of the retracting cylinder 61 is in communication with the atmosphere, and the rod 61a is extended by a spring (not shown). In the final step of closing the door 3, the pin 63 bends in the direction of arrow f as shown in FIG. The pin 63 of the door 3 is the first of the retractable cam 57.
When it hits the claw 57a, the retracting cam 57 rotates counterclockwise. Then, the tamming cam 58 shown in FIG. 9A which is coaxial with the retracting cam 57 also rotates, the lever 59a swings clockwise, the switching valve 59 switches, and pressurized air is supplied to the rod side chamber of the retracting cylinder 61. Then, the retracting lever 57 of FIG. 7C rotates from the released state of the chain double-dashed line position to the operating position of the solid line position, the second pawl 57b strongly pulls the pin 63 toward the vehicle body 1 side, and the upper part on the door butt side is also the vehicle body. Seal to 1.
That is, since the door 3 in FIG. 1 is supported at four points on the top and bottom of the door end side and the top and bottom of the door tail side, the door 3 is supported even at high pressure during high-speed traveling.
There is no rattling. And the door 3 of FIG. 9 (c)
When is opened, the compressed air in the retracting cylinder 61 is exhausted, so that a spring force acts and the retracting cam 57 rotates in the clockwise direction. Eventually, the switching valve 59 shown in FIG. 9A is switched, the rod side chamber of the retracting cylinder 61 communicates with the atmosphere, the rod 61a is extended by a spring (not shown) built in the cylinder side chamber, and the retracting cam 57 is released. Return to the state.

Although the door 3 is supported at the four corners by the upper retracting device 11 on the upper side of the door as shown in FIG. 1, in the present embodiment, the door 3 is supported at the lower side of the door in order to ensure the retracting of the door 3. Is also provided with a lower retractor 12. The structure of the lower retractor 12 will be described with reference to FIG. 10A is a top view and FIG. 10B is a side view. 1A and 1B, the retraction device 12 has a base 65, a shaft 66, a retraction cam 57 ', a retraction cylinder 61', and a lock device 67 as main parts. It is fixed to the side of the frame at the edge of the frame. Further, a recess 62 'is formed at a position facing the retracting cam 57' in the lower part of the door 3 on the door tail side, and a pin 63 'is provided so as to vertically cross the recess 62'.

The lock device 67 comprises a cylinder 67a, a rod 67b, a manual bar 67c and a spring 67d, and the rod tip 67e enters the notch 57d of the retracting cam 57 'to prevent the retracting cam 57' from rotating clockwise. , Keep working condition. The rod tip 67e is biased in the projecting direction by a spring 67d built in the cylinder side chamber 67f of the cylinder 67a, and when pressurized air is supplied to the rod side chamber 67g of the cylinder 67a, the rod tip 67e moves to the retracting cam 5.
Remove from 7 '. The lever 67c overcomes the biasing force of the spring 67d and forcibly pulls the rod tip 67e into the retracting cam 57 '.
It is for removing from. By the way, retract cylinder 6
The switching of 1'is performed by sharing the switching valve 61 of FIG. Therefore, the lower retraction device 12 in FIG. 10 is not provided with a switching valve or a speed control valve, but is provided with a lock device 67 instead.

Next, the operation of the lower retractor 12 described above will be described below. Retracting cam 57 'and retracting cylinder 6
The operation of 1'is similar to that described in FIG. As shown in FIG. 10A, the lock device 67 is actuated while the retracting cam 57 'is retracting the pin 63', and the retracting cam 57 'is activated.
Lock the operating position of. That is, until the retracting cam 57 'retracts the pin 63', pressurized air is supplied to the rod side chamber 67g of the cylinder 67a, and the rod tip 67e is separated from the retracting cam 57 '. When the retracting cam 57 'retracts the pin 63' and the vehicle body 1 travels at a speed of 10 km / h or more, the rod side chamber 67g of the cylinder 67a communicates with the atmosphere, and the spring tip 67e causes the rod tip 67e to mechanically operate the retracting cam 57 '. Lock to and maintain its working condition. However, when the vehicle body 1 becomes less than 5 km / h, pressurized air is supplied to the rod side chamber 67g of the cylinder 67a, the rod tip 67e retracts, and the lock of the retracting cam 57 'is released. Further, when the pressure of the air source of the compressed air disappears, the rod tip 67e remains advanced and there is no fear of opening the door 3. Furthermore, when the lever 67c is manually raised during a power failure in a garage or the like, the rod tip 67e retracts and the retracting cam 57 'is unlocked.
The door 3 can be opened manually. The lock device 67 shown in FIG. 10 may be provided in the upper retracting device 11 shown in FIG.

Next, an air circuit diagram for the above-described door engine 20, upper door retracting device 11 on the door tail side, and lower door retracting device 12 on the door tail side will be described with reference to FIG. Reference numeral 70 is an upper unit provided at the upper part of the entrance / exit, 11 is an upper retraction device provided at the upper part of the edge of the entrance / exit on the door butt side, and 12 is a lower retraction device provided at the lower part of the edge of the entrance / exit of the door butt. Also,
Door cock 71, underfloor door cock 72,
An air source 73 is provided.

A passage 74 from the door cock 71 enters the upper unit 70, and is connected to the door engine 20 via a filter 75 and a door opening electromagnetic valve 76. The door opening solenoid valve 76 includes a pilot switching valve 76a and a pilot valve 76b. The pilot switching valve 7 is a remotely operated pilot valve 76b.
6a is switched. When the pilot switching valve 76a is in the first position 76c, pressurized air is supplied to the passage 77, the cylinder 20a of the door engine 20 is shortened to the right in the drawing, and the door is closed. In addition, the upper retractor 1 via the passage 78
1 is also supplied with pressurized air. Pilot switching valve 76a
Is in the second position 76d, pressurized air is supplied to the passage 79, the cylinder 20a of the door engine 20 extends leftward in the drawing, and the door opens. At this time, the passages 77 and 78 are in communication with the atmosphere.

In the passage 79, a check valve 80 whose forward direction is the door engine 20 side and a spring-equipped check valve 81 whose forward direction is the bilot solenoid valve 76 side are connected in parallel. Furthermore,
A bypass passage 82 from between the check valves 80 and 81 and the door engine 10 has a check valve 83 whose discharge direction is a forward direction.
And is connected to the door cock 71.

The passage 78 is connected to the upper retractor 11 via an external passage 85. The upper retractor 11 is a switching valve 5
9, the speed control valve 60, and the retracting cylinder 61 are connected in series.
Branch passage 86 from between speed control valve 60 and retracting cylinder 61
Is connected to the lower retractor 12 via the external passage 87 and reaches the retracting cylinder 61 '. In addition, the branch passage 88 from between the air source 73 and the underfloor door cock 72 is provided in the upper unit 7.
The solenoid valve for locking 89 in 0 is reached. Solenoid valve for locking 89
Is connected to the retracting device 12 via an external passage 90 and the pressurized air reaches the locking device 67. The locking solenoid valve 89 switches to the position 89b when the vehicle running speed is 5 km or more, and remains in the position 89a when the running speed is less than 10 km.

Next, the opening / closing operation of the door will be described with reference to the above-mentioned pneumatic circuit diagram. In the state shown, the door is closed and the running speed is 1
The running state of less than 0 km is shown. That is, the pilot valve 76b is remotely operated, and the pilot switching valve 76a
Has been switched to the first position 76c. The pressurized air from the air source 73 enters the rod side chamber 20c of the cylinder 20a through the passage 77, and the door engine 20 operates in the door closing direction. Further, the pressurized air is also supplied to the upper retractor 11 via the passage 78 and the external passage 85, and the retractor cylinder of the retractor cylinder is switched through the switching valve 59 and the speed adjusting valve 60, which are switched to the positions shown in the figure in the final step of closing the door. Pressured air is introduced into the rod side chamber 61a, and the pin 63 is pulled in by the retracting cam 57 in FIG. At the same time, pressurized air is also introduced into the rod side chamber 61a of the retracting cylinder 61 'of the lower retracting device 12 through the external passage 87 of FIG.
3 is pulled in.

When the traveling speed reaches 10 km or more, the locking solenoid valve 89 shown in FIG. 11 is switched to the position 89b, the rod side chamber 67g of the locking device 67 communicates with the atmosphere through the external passage 90, and the spring 67d rotates the rod 67d. The tip 67e projects and locks the operating position of the retracting cylinder 61 '. Therefore, even if the compressed air in the retracting cylinder 61 'escapes, the retracting of the door is not released. The retracting cylinders 61, 6 in the retracting devices 11, 12 at the upper and lower portions
It is also possible to provide a solenoid valve also in the passage 85 leading to 1 ', so that the retracting cylinders 61, 61' operate when the traveling speed reaches 10 km or more, for example.

By the way, during the door closing process, a person or luggage may be caught in the door. At this time, if the pressure of the rod side chamber 20c of the cylinder 20a of the door engine 20 rises and a person or a luggage is removed from the door, the cylinder 20a is suddenly shortened in the door closing direction, and the door is suddenly closed. In this case, the pressure in the cylinder side chamber 20b of the cylinder 20a is increased by an amount corresponding to the spring force of the check valve with spring 81, which prevents the cylinder 20a from being suddenly shortened in the door closing direction. However, due to the existence of the check valve 81 with spring, residual pressure remains in the cylinder side chamber 20b of the cylinder 20a. Therefore, it becomes difficult to manually open and close the door in a state where the power source and the air source are removed when the vehicle is parked. However, when the door cock 71 is opened when the vehicle is put in the garage, the residual pressure of the cylinder side chamber 20b is released to the atmosphere through the passage 82 and the check valve 83, and the manual opening and closing of the door can be facilitated.

When opening the door, the pilot valve 76
The pilot switching valve 76a is switched to the second position 76d by operating b remotely. The pressurized air from the air source 73 enters the cylinder side chamber 20b of the cylinder 20a through the passage 79, and the door engine 20 operates in the door opening direction. At this time,
The locking solenoid valve 89 is switched to the position 89a, and the locking device 67 is in the unlocked state shown in the figure.
Further, the switching valve 59 of the upper retracting device 11 is also switched from the position shown in the figure, and the operation of the retracting cam by the retracting cylinder 61 is also released. Similarly, the operation of the retracting cam by the retracting cylinder 61 'of the lower retracting device 12 is also released. Therefore, the door opens in a state of being opened from the upper and lower retracting devices 11 and 12.

[0038]

According to the plug door device of the present invention, the door end rail is provided as a convex shape projecting from the floor surface of the vehicle body, and the guide tool provided on the lower part of the door end side of the door is in a concave parallel shape for engaging with the door end rail. Provided as a projection, the parallel projection is formed in a direction parallel to the door so as to form the acute angle with the door rail when the door is fully closed, and holds the door rail when the door is fully closed. In the middle of the opening and closing process of, the lower part of the door on the door tip side opens and closes along the acute angle of the door tip rail, the parallel protrusions of the door tip rail and the door are substantially parallel, and the door opens and closes smoothly,
When the door is fully closed, the door is at a sharp angle with the door rail and is flush with the side of the vehicle body.The door rail is pinched by the parallel protrusions of the door, so there is no gap, so when the vehicle passes by a tunnel or tunnel. Even if the wind pressure increases at the time of entry, it is possible to prevent vibration of the door and entry of draft air from the side seal portion. In addition, since the door rail has a convex shape that protrudes from the floor,
Compared to the inverted T-shaped groove formed on the floor surface, the structure can be simplified, and there is no fear that dust and debris will accumulate on the door rail.

[Brief description of drawings]

FIG. 1 is a front view of a plug door device according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG.

FIG. 4 is a sectional view taken along line CC of FIG.

5 is a cross-sectional view taken along the line I-I of FIG.

6 is a cross-sectional view taken along line DD of FIG.

7 is a sectional view taken along line EE of FIG.

8 is a cross-sectional view taken along the line FF of FIG.

FIG. 9 is a view showing an upper retracting device in a G portion of FIG.

FIG. 10 is a diagram showing a lower retracting device with a locking device in the H part of FIG. 1.

FIG. 11 is a pneumatic circuit diagram of the plug door device.

FIG. 12 is a side sectional view showing a door end rail in a conventional plug door device.

[Explanation of symbols]

 1 Vehicle Body 2 Entrance / Exit 3 Door 4 Upper Rail 5 Convex Door Tip Rail 6 Tojiri Rail 6a Curved Part 7 Concave Guide Tool 8 Guide Tool 9 Connecting Part 33, 34 Concave Parallel Protrusion

Claims (1)

[Claims] 1. A plug door device that pushes a door, which is provided flush with a side surface of a vehicle body at an entrance / exit of a vehicle body, to the outside of the vehicle and opens / closes along the side surface of the vehicle body, the plug door device being provided above the entrance / exit opening. An upper rail, a door tip rail provided below, and a door butt rail extending in parallel to the door tip rail from the door butt side of the door to the vehicle body side surface. The upper rail and the door tip rail are parallel to each other. Is provided on a straight line that forms an acute angle with this door when fully closed, and the door butt rail is provided parallel to the vehicle body side surface with a curved portion that curves the door butt side in the vehicle inward direction, The upper rail is engaged with an upper part of the door on the door end side through a connecting portion, and the upper and lower rails are engaged with the lower part of the door on the door end side and the lower part of the door butt via a guide tool. Open and close the door with this upper rail, door tip rail and door butt rail In the plug door device for guiding and supporting, the door tip rail is provided as a convex shape projecting from the vehicle body floor surface, and the guide tool provided at the lower part of the door on the door tip side is a concave parallel protrusion engaging with the door tip rail. The parallel protrusion is formed in a direction parallel to the door so as to form the acute angle with the door rail when the door is fully closed, and holds the door rail when the door is fully closed. Plug door device to do.