JP2594528B2 - Plug door device - Google Patents

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 which pushes a door provided at a doorway of a vehicle body such as a railway vehicle toward a vehicle body and opens and closes the door along a side surface of the vehicle body.

[0002]

2. Description of the Related Art A plug door device of this type is known from British Patent No. 148,981.
To open and close the door along the side of the vehicle body, an upper rail is provided above the elevator, and a door rail is provided below the elevator, along the side of the vehicle from the side of the door in parallel with this door rail. Tojiri rails are provided. And in order to push the door toward the vehicle body, the upper rail and the door rail are inclinedly arranged such that the door bottom side approaches the door opening side toward the door top side,
The door end side of the door butt rail has a curved portion facing the elevator. The upper part of the door end is engaged with the upper rail via a connecting portion such as a roller, the lower part of the door end is engaged with the door rail via a guide such as a roller, and the lower part of the door end is engaged with the door butt rail. Are engaged via guides such as rollers. In order to open and close the door, the connecting portion is connected to a driving portion such as a door engine.

In the plug door device having such a structure, in the final step of closing the door from the side of the vehicle body to the doorway, the door guided by the upper rail, the door rail and the door end rail is pushed out to the vehicle body side, and the sealing is performed. It is structured to be in close contact with the entrance via the member. Therefore, it is generally known as a door device that does not require a door pocket and has good airtightness.

However, the above-described plug door apparatus has only three rails, and has a structure in which the door is supported at three points: an upper part of the door, a lower part of the door, and a lower part of the door. For this reason, the door rattles due to wind pressure during traveling or the like, and the airtightness at the upper part of the door end is easily damaged. Therefore, in the plug door device disclosed in the above-mentioned British Patent No. 1482981, a catch device as shown in FIG. 11 is provided on the upper side of the door end to prevent backlash. This catch device is a door 1
A roller 103 is provided on the upper side of the door end of the vehicle body 01 via a plate 102, and a funnel-shaped catcher 107 provided via a bracket 106 at an entrance / exit edge 105 of a vehicle body 104. In the final step of closing the door, the door bottom side of the door 101 is pushed out toward the vehicle body 104 as indicated by an arrow j, so that the roller 103 is received by the catcher 107 and locked.

[0005]

However, if the wind pressure on the side of the vehicle body increases due to recent high-speed running of vehicles, for example, when passing through a tunnel or passing a train, the conventional catch device as described above uses a roller. Due to the presence of the gap between 103 and catcher 107, it is not possible to prevent the door from vibrating in a high-pressure state or maintain airtightness. In other words, there is a problem that noise and draft in the high speed traveling cannot be ignored.

SUMMARY OF THE INVENTION 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 which is highly airtight when the door is closed.

[0007]

In order to achieve the above object, a plug door device of the present invention is a plug door device that pushes a door provided at an entrance / exit of a vehicle body to a vehicle body side and opens and closes along a side surface of the vehicle body. There is an upper rail provided above the entrance, a door rail provided below and a door bottom rail extending in parallel with the door rail from the door bottom side of the door to the side of the vehicle body, The upper rail is engaged with the upper part of the door via the connecting part, and the door rail and the door bottom rail are engaged with the lower part of the door and the upper part of the door via the guide. In the plug door device in which the connecting portion is connected to the driving portion, the upper and lower portions of the door and the lower portion of the door are guided and supported to open and close the door. The entrance, which is located at the upper part of the door end A retracting device that engages with the pin when the door is closed to retract the door into the vehicle interior, the retracting device includes a first claw that contacts the pin and starts a retracting cylinder in a final step of closing the door; A retractable cam having a second claw that retracts the pin into the vehicle by the operation of the retractable cylinder is provided. The retracting device preferably has a lock device for holding the retracting cam at that position when the pin is retracted inside the vehicle.

[0008]

In the final step of closing the door, the door is pushed out to the vehicle body side, and the pin provided at the upper part of the door end approaches the retracting device provided at the opposite entrance edge of the upper part of the door side. Then, the first claw of the retraction cam of the retraction device abuts on the pin on the door side, and the retraction cam rotates to operate the retraction cylinder.
The retracting cylinder further rotates the retracting cam, and the second pawl on the retracting cam strongly retracts the pin on the door side. as a result,
The upper part of the door is supported in a state where it is retracted into the vehicle body side, and the four corners of the door are joined together with the connecting part on the upper part of the door, the lower part of the door, and the lower part of the door. Support it in the state pushed out to the entrance. Then, when the locking device mechanically locks the retraction position of the retraction cam, the retraction position is held regardless of the power of the retraction cylinder device.

[0009]

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

In FIG. 1, 1 is a vehicle body, 2 is a doorway, 3
Is a door, 4 is an upper rail, 5 is a door rail, 6 is a door bottom rail, 7 is a lower door side guide, 8 is a lower door bottom guide, 9 is a connecting section, 10 is a driving section, Reference numeral 11 denotes an upper retracting device on the door bottom side, and 12 denotes a lower retracting device on the door bottom side.

The drive unit 10 is connected to a belt 23 around which the tip of the door engine 20 is wound around a first pulley 21 and a second pulley 22, and is connected to a third pulley 2 coaxial with the first pulley 21.
In this configuration, the connecting portion 9 is connected to a belt 26 wound around the fourth and fourth pulleys 25. When the door engine 20 is extended, the belt 26 whose speed is increased 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 shown in FIG. 1 is engaged with the upper rail 4 at the connecting portion 9 on the upper side of the door, is engaged with the door rail 5 with the guide 7 on the lower side of the door, and is connected to the lower part on the side of the door ass. The door 8 is engaged with the door end side rail 6 by the guide 8 and is connected by the door engine 10 connected to the connecting portion 9 from the closed position of the solid line (the position closing the entrance 2) to the open position of the two-dot chain line (the side of the vehicle body 1). Position). FIG.
As can be clearly seen, the door 3 in the closed position is pushed into the side of the vehicle body 1, but the door in the open position protrudes from the vehicle body 1 and is located on the side surface of the vehicle body 1.

Next, the structure of the door rail 5 for pushing the door to the vehicle body in the final step of closing the door, its guide 7 and the door bottom rail 6 and its guide 8 will be described with reference to FIGS. FIG.
, The door rail 5 is provided at a position corresponding to the entrance 2 of the vehicle body 1, is entirely linear, and has an inclination angle α in which the door side enters the vehicle body 1. Tojiri rail 6
Is provided so as to extend from the door bottom side of the door 3 to the side surface of the vehicle body 1, and has a straight portion 6a and a curved portion 6b. That is,
The door end side of the door 3 is gradually pushed into the vehicle body 1 along the door end rail 5, but the door end side of the door 3 rapidly moves along the curved portion 6a of the door end rail 6 in the final step of closing the door. Pushed.

In FIG. 4, the door rail 5 is fixed in a laterally concave portion of the lower frame 30 of the vehicle body 1 and has an upper guide concave groove 31 and a lower guide inclined surface 32. The door-side guide 7 is provided with an upper roller 34 and a lower roller 35 at the tip of the laterally protruding portion 33a of the reinforcing member 33 embedded in the door 3.
Is rotatably supported. The upper roller 34 enters the upper guide groove 31 and is regulated and guided in the left-right direction in the drawing. The lower roller 35 has a conical portion 35a, and the conical portion 35a contacts the lower guide inclined surface 32 to prevent the door 3 from hanging down.

In FIG. 5, the door bottom rail 6 is fixed in a laterally concave portion of the lower frame 36 of the vehicle body 1 and has an upper guide groove 37 and a lower guide V groove 38. The door-side guide 8 is configured such that an upper roller 40 and a lower roller 41 are rotatably supported at the distal end of a laterally protruding portion 39 a of a reinforcing 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, and 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.

Next, similarly, the structures of the upper rail 4 and the connecting portion 9 will be described with reference to FIGS. In FIG. 6, an upper rail 4 is a slide rail, and is provided with an inclination angle α in which the door tip side enters the vehicle body 1, similarly to the door tip rail 5 of FIG. In FIG. 7, the upper rail 4 is fixed to a frame 45 in the vehicle body 1. The connecting portion 9 is L
The main part includes a U-shaped bracket 46, a spherical bearing 47, and a slide member 48. Bracket 46
Is fixedly provided inside the upper part of the door 3, and the spherical bearing 47 is composed of a movable spherical portion 47a and a fixed spherical seat portion 47b. The spherical bearing 47 is fitted into a lateral hole 46a provided at the tip of the bracket 46, and the spherical portion 47a is The plate 49a is fixed to the stepped shaft 48a, and the spherical seat portion 47b is fixed to the bracket 46 by the contact plate 49b. The slide member 48 is fitted on the upper rail 5 and is slidable in the thickness direction of the drawing. I have. Also, the second bracket 51 is sandwiched between the nut 50 and the contact plate 49a,
The upper horizontal portion is connected to the belt 26 of the drive unit.

Next, the procedure of assembling the plug door device having the above-described structure will be described below. In FIG. 1, an upper rail 4 and a driving unit 10 are attached to an upper part of a vehicle body 1, and a door rail 5 and a door end rail 6 are attached to a lower part of the vehicle body 1.
Then, the guides 7 and 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. 7 is fitted is inserted into the stepped shaft 48 a of the slide member 48. The vehicle body 1 and the door 3 are sheet metal processed, and the dimensional accuracy is not so good. The dimensional differences in the height direction, the front-rear direction, and the left-right direction can be absorbed by the long holes of the bolts c and d of the bracket 46. , D cannot be absorbed. But,
The bracket 46 can be inclined in any direction about the point A by the spherical bearing 47. For this reason, it is possible to assemble the vehicle body 1 and the door 3 with minimum sheet metal correction, and reduce the number of assembling steps. In addition, no excessive force is generated in the sliding travel of the upper rail 4 as the slide rail and the sliding member 48, and smooth traveling is ensured.

The opening and 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 slides along the upper rail 4 rightward in the drawing. In addition, the guide 7 at the lower part of the door end is guided along the door rail 5, and the guide 8 at the lower part of the door end is also guided along the door end rail 6. As shown in FIG. 3, the door bottom rail 6 has a curved portion 6a, and the door bottom side of the door 3 is pushed out to the side opposite to the vehicle body 1 in the initial stage of opening the door. Since the door rail of FIG. 3 and the upper rail of FIG. 6 are inclined at an angle α, the door rail is gradually pushed out to the opposite side of the vehicle body 1 in all steps of the door opening operation, and finally along the side surface of the vehicle body 1. This is the position indicated by the two-dot chain line.

As shown in FIGS. 4 and 5, the upper guide groove 31, the upper roller 34 and the upper guide groove 37 of the guide 7 at the lower part of the door and the guide 8 at the lower part of the door end.
The upper roller 40 restricts the play of the door 3 in the left-right direction in the drawing. The lower guide V groove 38 and the lower roller 41
The lower cone 41b restricts the downward movement of the door 3 due to its own weight. Due to these restrictions, the door 3 opens and closes smoothly without play.

In FIG. 1, when the door 3 is closed, a person or luggage may be caught between the door 3 and the entrance 2 of the vehicle body 1. Incidentally, the spherical bearing 4 as shown in FIG.
7, the door 3 around the point A in FIG.
A counter-clockwise rotation is generated. Therefore, the lower part of the door bottom side of the door 3 tends to float. When the lower part on the side of the door rises, the door 3 may be distorted and the closing operation may stop. However, as shown in FIG. 5, the door bottom rail 6 has a lower guide V groove 38, and the upper conical portion 41a of the lower roller 41 in the guide device 8 at the lower side of the door bottom.
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. Therefore, 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. 3 will not be lifted and prying.

By the way, the door 3 shown in FIG. 1 has a connecting portion 9 on the upper side of the door, a guide 7 on the lower side of the door, and a guide 8 on the lower side of the door end.
There is a risk that play will occur at the free upper part of the door end. Therefore, an upper retracting device 11 is provided on the door bottom side. This upper retracting device 11 is shown in FIG.
This will be described below.

FIG. 8A is a top view, FIG. 8B is a side view, and FIG. 8C is an operation diagram. 3A and 3B, 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 control valve 60, and a retraction cylinder 61 as main components. It is fixed to the side of the frame at the edge of the entrance 2 of the vehicle body 1. In addition, a recess 62 is formed at a position on the upper side of the door 3 opposite to the retraction cam 57, and a pin 63 is provided so as to cross the recess 62 up and down.

A rotary shaft 56 is rotatably mounted on a base 55, and a timing cam 58 and a retraction cam 5
9 is fitted and fixed. A tip roller 59b of a lever 59a of a switching valve 59 is urged against 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 is switched, and compressed air is supplied via the speed adjusting valve 60 in the shortening direction of the retracting cylinder 61. .

The retracting cam 57 includes a first claw 57a and a second claw 5
7b, the arm 57c on the opposite side of the claws 57a, 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 of the door end moves in a curved manner as indicated by an arrow e in FIG. 3C, the pin 63 of the door 3 also moves in a curved manner as indicated by an arrow f, and the first claw 57a longer than the second claw 57b is initially moved. To the pin 63. The tip of the second claw 57b in FIG. 9A has a hook shape bent in the counterclockwise direction 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. The pin 63 is pulled into the vehicle body 1 as shown in FIG.

The retractable cylinder 61 has a built-in spring in the cylinder side chamber. When the rod side chamber is in communication with the atmosphere, the rod 61a is extended by the spring, and the retractable cam 57 is shown by a solid line in FIG. Is released. Switching valve 5
When the pressurized air is supplied to the rod-side chamber through the speed control valve 60 by the step 9, the rod 61a is shortened, and the retracting cam 57 is brought into the operating state shown by the solid line in FIG.

Next, the operation of the upper retracting device 11 will be described. In the door-open state of FIG. 3A, the rod-side chamber of the retracting cylinder 61 communicates 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 and moves in the direction of arrow f as shown in FIG. The pin 63 of the door 3 is the first
When hitting the claw 57a, the retraction cam 57 rotates counterclockwise. Then, the tamping cam 58 of FIG. 7A coaxial with the retraction cam 57 also rotates, the lever 59 a swings clockwise, the switching valve 59 is switched, and pressurized air is supplied to the rod side chamber of the retraction cylinder 61. Then, the retracting lever 57 shown in FIG. 4C is rotated from the release state of the two-dot chain line position to the operation position of the solid line position, the second claw 57b pulls the pin 63 strongly toward the vehicle body 1 side, and the upper part on the door end 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 and on the top and bottom of the door, the door 3 can be operated at high pressure during high-speed traveling.
There is no rattling. Then, the door 3 in FIG.
Is opened, the air pressure of the retracting cylinder 61 is exhausted to apply a spring force, and the retracting cam 57 rotates clockwise. Eventually, the switching valve 59 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) incorporated 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, in order to secure the retracting of the door 3, the lower side of the lower side of the door is required. A lower retracting device 12 is also provided. The structure of the lower retracting device 12 will be described with reference to FIG. FIG. 9A is a top view, and FIG.
Is a side view. 1A and 1B, the retracting device 12 mainly includes a base 65, a shaft 66, a retracting cam 57 ', a retracting cylinder 61', and a locking device 67. Is fixed to the side of the frame at the edge of the frame. In addition, at the lower part of the door bottom side of the door 3,
A recess 62 'is formed at a position opposite to the recess 7'.
A pin 63 'is erected so as to cross up and down 2'.

The locking device 67 comprises a cylinder 67a, a rod 67b, a manual bar 67c, and a spring 67d. The rod end 67e enters the notch 57d of the retraction cam 57 'to prevent the retraction cam 57' from rotating clockwise. , Keep the operating state. The rod end 67e is urged in the protruding 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 end 67e is pulled into the retraction cam 5.
Deviates from 7 '. The lever 67c overcomes the urging force of the spring 67d and forcibly pulls the rod tip 67e to retract the cam 57 '.
It is for removing from. By the way, the retracting cylinder 6
Switching of 1 'is performed by sharing the switching valve 61 of FIG. Therefore, the lower retraction device 12 in FIG. 9 is not provided with a switching valve or a speed control valve, and has a structure in which a lock device 67 is provided instead.

Next, the operation of the lower retracting device 12 will be described below. Retraction cam 57 'and retraction cylinder 6
The operation of 1 'is similar to that described with reference to FIG. As shown in FIG. 9A, the locking device 67 is operated in a state where the retracting cam 57 'retracts the pin 63' to lock the operating position of the retracting cam 57 '. 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 disengaged from the retracting cam 57 '. The retracting cam 57 'is pin 6
When 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 rod end 67e mechanically locks the retracting cam 57 'by the spring 67d, thereby operating the vehicle. Maintain state. However, when the speed of the vehicle body 1 becomes less than 10 km / h, pressurized air is supplied to the rod-side chamber 67g of the cylinder 67a, the rod tip 67e retreats, and the lock of the retraction cam 57 'is released. In addition, when the pressure of the air source of the pressurized air has disappeared, the rod tip 67e remains extended, and there is no danger that the door 3 will open. Further, when the lever 67c is manually raised during a power outage in a garage or the like, the rod end 67e is retracted, and the lock of the retraction cam 57 'is released.
The door 3 can be opened manually. The locking device 67 in FIG. 9 can be provided in the upper retracting device 11 in FIG.

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

The passage 74 from the door cock 71 enters the upper unit 70, and is connected to the door engine 20 via the filter 75 and the door opening solenoid valve 76. The door opening solenoid valve 76 includes a pilot switching valve 76a and a pilot valve 76b.
Switch 6a. 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 retracting device 1 passes through 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 to the left in the drawing, and the door opens. At this time, the passages 77 and 78 are in communication with the atmosphere.

A check valve 80 having the door engine 20 side in the forward direction and a spring check valve 81 having the bi-rot solenoid valve 76 side in the forward direction are connected in parallel to the passage 79. Furthermore,
A bypass passage 82 between the check valves 80 and 81 and the door engine 10 forms a check valve 83 with the discharge direction as a forward direction.
Through the door cock 71.

The passage 78 is connected to the upper retracting device 11 via an external passage 85. The upper retraction device 11 includes the switching valve 5
9 is a serial connection of the speed control valve 60 and the retracting cylinder 61.
Branch passage 86 between the speed regulating valve 60 and the retracting cylinder 61
Is connected to the lower retraction device 12 via the external passage 87 and reaches the retraction cylinder 61 '. A branch passage 88 between the air source 73 and the underfloor door cock 72 is provided in the upper unit 7.
It reaches the locking solenoid valve 89 within 0. Locking solenoid valve 89
Is connected to the retraction device 12 via the external passage 90, and the compressed air reaches the locking device 67. The locking solenoid valve 89 is switched to the position 89b when the traveling speed of the vehicle body is 5 km or more, and remains at the position 89a when the traveling speed is less than 10 km.

Next, the operation of opening and closing the door will be described with reference to the above-described pneumatic circuit diagram. In the state shown, the door is closed and the traveling speed is 5
A running state of less than km is shown. That is, the pilot valve 76b is remotely operated, and the pilot switching valve 76a is switched to the first position 76c. Air source 7
The pressure air 3 enters the rod side chamber 20c of the cylinder 20a via the passage 77, and the door engine 20 operates in the door closing direction. Further, the pressurized air is also supplied to the upper retraction device 11 through the passage 78 and the external passage 85, and the switching cylinder 59 is switched to the illustrated position in the final step of closing the door, and the speed adjustment valve 60 is used to control the retraction cylinder. Pressurized air is introduced into the rod side chamber 61a, and the pin 63 is drawn in by the drawing cam 57 in FIG. At the same time, pressurized air is also introduced into the rod side chamber 61a of the retraction cylinder 61 'of the lower retraction device 12 via the external passage 87 of FIG. 10, and the pin 63 is retracted by the retraction cam 57 of FIG.

When the traveling speed becomes 5 km or more,
The lock solenoid valve 89 in FIG. 10 is switched to the position 89b, the rod side chamber 67g of the lock device 67 communicates with the atmosphere through the external passage 90, and the rod end 67 is moved by the spring 67d.
e protrudes and locks the operating position of the retracting cylinder 61 '. Therefore, even if the pressure air of the retracting cylinder 61 'is released, the retracting of the door is not released. The retracting cylinders 61, 61 'in the upper and lower retracting devices 11, 12 are provided.
A solenoid valve is also provided in the passage 85 leading to the vehicle.
It is also possible to adopt a configuration in which the retracting cylinders 61, 61 'operate when the distance exceeds km. In this case, FIGS. 8 and 9
The first claw 57a of the retraction cams 57, 57 'and the switching valve 60 are not required.

By the way, during the door closing process, a person or luggage may be caught in the door. At this time, if the pressure in the rod side chamber 20c of the cylinder 20a of the door engine 20 rises and a person or luggage comes off the door, the cylinder 20a is suddenly shortened in the door closing direction and the door is closed suddenly. 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 81 with spring, thereby preventing the cylinder 20a from suddenly shortening in the door closing direction. However, due to the presence of the check valve 81 with spring, residual pressure remains in the cylinder side chamber 20b of the cylinder 20a. For this reason, it is difficult to manually open and close the door in a state where the power supply and the air source are lost when the vehicle is put in a garage or the like. However, when the door cock 71 is opened when the vehicle is put in the garage, the residual pressure in the cylinder side chamber 20b is released to the atmosphere through the passage 82 and the check valve 83, so that the door can be easily opened and closed manually.

When the door is opened, the pilot valve 76 is opened.
b is remotely operated to switch the pilot switching valve 76a to the second position 76d. The pressurized air from the air source 73 enters the cylinder side chamber 20b of the cylinder 20a via the passage 79, and the door engine 20 operates in the door opening direction. At this time,
The lock solenoid valve 89 has been switched to the position 89a, and the lock device 67 is in the released state as shown.
Further, the switching valve 59 of the upper retraction device 11 is also switched from the illustrated position, and the operation of the retraction cam by the retraction cylinder 61 is released. Similarly, the operation of the retraction cam by the retraction cylinder 61 'of the lower retraction device 12 is also released. Therefore, the door is opened in a state where it is opened from the upper and lower retraction devices 11 and 12.

[0038]

According to the plug door apparatus of the present invention, a pin is provided at the upper part of the door end of the door, and the door is engaged with the pin at the entrance edge opposite to the upper part of the door when the door is closed to engage the door inside the vehicle. A first pawl for starting the retracting cylinder by contacting the pin in the final step of closing the door, and a second pawl for retracting the pin into the vehicle by operating the retracting cylinder. In the final step of closing the door, the door is pushed out to the vehicle body side,
The pin provided at the upper part of the door end approaches the retracting device provided at the opposite entrance edge of the upper part of the door end, and the first claw of the retracting cam of the retracting device comes into contact with the pin on the door side and retracts. The retraction cylinder is operated by the rotation of the cam, the retraction cylinder further rotates the retraction cam, the second claw of the retraction cam pulls the pin on the door side strongly, and the upper part of the door is retracted to the vehicle body side on the door end side. It is supported in a state where
The four corners of the door are supported by pushing the four corners of the door to the entrance and exit of the car body together with the guide at the bottom of the door and the guide at the bottom of the door end, so that the door is securely attached to the entrance of the car, The door does not vibrate even in a high-pressure state during high-speed running, and noise and drafts during high-speed running can be completely prevented. And
If the retracting device has a lock device that holds the retracting cam at that position when the pin is retracted inside the vehicle, the retracted position of the door is maintained regardless of the force of the retracting cylinder device. Even if the pressure air drops, it is possible to secure the close contact with the door entrance.

[Brief description of the drawings]

FIG. 1 is a front view of a plug door device of 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. 1;

FIG. 4 is a sectional view taken along the line CC of FIG. 1;

FIG. 5 is a sectional view taken along line DD of FIG. 1;

FIG. 6 is a sectional view taken along the line EE of FIG. 1;

FIG. 7 is a sectional view taken along line FF of FIG. 1;

FIG. 8 is a view showing an upper retracting device.

FIG. 9 is a view showing a lower retraction device with a lock device.

FIG. 10 is a pneumatic circuit diagram of the plug door device.

FIG. 11 is a top view of a catcher provided in a conventional plug door device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body 2 Entrance / exit 3 Door 4 Upper rail 5 Door rail 6 Door bottom rail 7 Guide 8 Guide 9 Connecting part 10 Drive part 11 Upper retraction device 12 Lower retraction device 57 Retraction cam 57a First claw 57b Second claw 61 Retraction cylinder 63 Pin 76 Lock device

Claims (2)

(57) [Claims] 1. A plug door device that pushes a door provided at a doorway of a vehicle body toward a vehicle body and opens and closes along a side surface of the vehicle body, comprising: an upper rail provided above the doorway; A door end rail and a door end rail extending from the door end side of the door to the side of the vehicle body in parallel with the door end rail, wherein the upper rail is engaged with a door end side upper portion of the door via a connecting portion. At the same time, the door rail and the door bottom rail are engaged with the door bottom side and the door bottom side of the door via a guide, and the connecting portion is connected to a driving unit, so that the door top side of the door is connected. And a plug door device in which the lower part and the door bottom side are guided and supported to open and close the door, wherein a pin is provided on the door bottom side upper part of the door, and at the entrance / exit edge facing the door bottom side upper part, when the door is closed. A retracting device that engages with this pin and pulls the door into the vehicle Only, this pull-in device,
It is provided with a retraction cam having a first claw that comes into contact with the pin to start the retraction cylinder in the final step of closing the door and a second claw that retracts the pin into the vehicle by operating the retraction cylinder. And the plug door device. 2. The plug door device according to claim 1, wherein the retracting device has a lock device for holding the retracting cam at the position when the pin is retracted inside the vehicle.