JPH0781460B2 - Plug door device and its control device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plug door device and a control device therefor, and more particularly, to an upper mechanism that drives the door to open and close above an opening in a vehicle side wall, and below the opening. In the present invention, the present invention relates to a plug door device having a lower mechanism for guiding the opening / closing movement of the door and a control device therefor.

[Conventional technology]

For example, according to Japanese Utility Model Publication No. 57-58043, as an automatic door device provided at an entrance / exit of a railway vehicle or the like, the following technique is adopted to remove a door from an entrance / exit (opening) on a side wall of a vehicle. It has been suggested that the vehicle be taken out of the vehicle and then moved along the side wall of the vehicle.

That is, this technique attaches an upper guide rail to a vehicle-side member on the inside of the vehicle above the entrance and exit, and attaches a lower rail to a vehicle-side member on the inside of the vehicle below the entrance and exit, and
A guide door roller fixed to the door via an upper connecting metal is engaged with the upper guide rail, and a guide wire fixed to the door via a lower connecting metal is engaged with the lower rail. . A rod of an opening / closing cylinder fixedly mounted on the vehicle-side member is engaged and connected to the upper connecting member, and a rod which vertically swings as the rod of the guide cylinder fixedly mounted on the vehicle-side member is moved back and forth. Two levers are installed, the guide roller attached to the tip of the upper lever of these is fitted into the guide groove of the door, and the roller attached to the tip of the lower lever is attached to the inner surface of the door. It is possible to roll along. In this case, both the upper guide rails and the lower rails are formed such that their door end side end portions are curved inward of the vehicle. The two upper and lower levers are fixed to an operation shaft extending in the vertical direction and integrally rotate with the operation shaft.

According to this structure, when the door is opened from the fully closed state, the two upper and lower levers are swung by the operation of the guide cylinder so that the guide roller and the roller move the upper and lower parts of the door toward the outside of the vehicle. Then, the door is taken out of the vehicle along the curved parts of the upper guide rail and the lower rail, and then the door is moved by the operation of the opening / closing cylinder. Along the side wall of the vehicle, the vehicle moves parallel to the opening direction while maintaining a constant distance. On the other hand, when the door is closed from the fully open state, the door cylinder moves in parallel with the closing direction due to the operation of the opening / closing cylinder, and when it reaches the bending point of the upper guide rail and the lower rail, the upper and lower levers move due to the operation of the guide cylinder. Oscillates and the guide roller in the guide groove attracts the door toward the inside of the vehicle along the curved portions of the upper guide rail and the lower rail.

[Problems to be Solved by the Invention]

However, according to the technique disclosed in the above publication, when the door is fully closed, the door is pulled toward the inside of the vehicle only by the thrust of the opening / closing cylinder and the pushing force of the guide cylinder, that is, only with respect to the upper part of the door. Since a positive pulling force acts and the guide wire is merely engaged with the lower rail for the lower part of the door,
There is a problem that a sufficient attraction force does not act on the lower part of the door, so that sufficient airtightness cannot be ensured when traveling at high speed.

Further, the one disclosed in the above-mentioned publication has an operating shaft as an indispensable constituent element for interlocking the upper and lower two levers,
In addition, a bearing or the like for rotatably holding the action shaft must be attached to the periphery of the entrance / exit, which is extremely disadvantageous in terms of appearance and layout.

According to Japanese Utility Model Laid-Open No. 2-71789, a configuration is disclosed in which the upper mechanism that contributes to the opening / closing drive of the door and the door are connected at one place only by the connecting plate provided on the door tip side. However, in the plug door device having the upper mechanism of this kind, there is a problem in what kind of structure is optimal for ensuring airtightness by guiding and moving the lower part of the door.

The present invention has been made in view of the above circumstances, and by adding a lower mechanism having an optimum structure to a predetermined upper mechanism that is responsible for opening and closing the door, there is no problem in terms of appearance or layout. The technical issue is to ensure sufficient airtightness without inviting.

[Means for Solving the Problems]

Where the concrete means in the plug door device for achieving the above technical problem is configured to move along the vehicle side wall after the door is brought out of the vehicle from the opening of the vehicle side wall, A plug door device comprising an upper mechanism that is provided above the opening and that drives the door to open and close, and a lower mechanism that is provided below the opening and that guides opening and closing movement of the door. A first guide rail attached to an upper vehicle member of the opening for guiding movement of the door in and out of the vehicle; and a first guide rail suspended in the first guide rail in an opening and closing direction along a vehicle side wall of the door. A second guide rail that guides movement, a slide member that is connected to the door and slides in the opening and closing direction along the second guide rail, and a door that is connected to the slide member and moves the door in the opening and closing direction. An opening / closing cylinder, and an entrance / exit cylinder that is connected to the second guide rail and moves the door along with the second guide rail along the first guide rail. A pair of link members which are arranged in parallel at positions corresponding to the hip side, one end of each of which is connected to a vehicle-side member below the opening and the other end of which is connected to a support frame; A holding member that is attached to the support frame and engages and holds the door slidably only in the opening and closing direction; a first guide portion that is formed in the support frame and extends in the opening and closing direction; and a vehicle below the opening portion. A second guide portion formed on the side member and extending in the opening / closing direction, and a door closing side end portion of which is bent inward in the vehicle, and the first guide portion and the first guide portion which are attached to a door tip side end portion of a lower portion of the door. The first engaged with the two guides respectively The combined portion and the second engaging body, and the rod portion that is attached to the vehicle-side member and is connected to at least one of the pair of link members or the support frame, and moves the link member or the support frame to lower the door. And an auxiliary cylinder for moving the vehicle in and out of the vehicle.

Further, regarding the control device for controlling the plug door device configured as described above, any one of a first conduit communicating with one port of the opening / closing cylinder and a second conduit communicating with the other port and a fluid pressure source. An electromagnetic valve is provided for switching and connecting to a main pipeline communicating with the first pipeline, the first branch pipeline is branched from the middle of the first pipeline, the first branch pipeline is connected to one port of the inlet / outlet cylinder, and the first pipeline is connected to the first pipeline. 1 from the middle of 1 branch line
The auxiliary branch pipeline is branched to connect the first auxiliary branch pipeline to one port of the auxiliary cylinder, and the second branch pipeline is branched from the middle of the second pipeline to connect the second branch pipeline. The second auxiliary branch conduit is connected to the other port of the inlet / outlet cylinder and the second auxiliary branch conduit is branched from the middle of the second branch conduit to connect the second auxiliary branch conduit to the other port of the auxiliary cylinder; The branch portion of the first pipeline in the first branch pipeline and the first branch
A door is located on the moving path in the vehicle inward / outward direction between the branch portion of the auxiliary branch pipeline and the branch portion of the second pipeline in the second branch pipeline and the branch portion of the second auxiliary branch pipeline. The first branch pipe line and the second branch pipe line are communicated with each other when the door is located, and the first branch pipe line is directed only in the first pipe line direction when the door is located in the movement path in the opening / closing direction. There is provided a switching valve that is in a shut-off state and that shuts the second branch conduit only in the other port direction of the inlet / outlet cylinder and the auxiliary cylinder.

[Action]

According to the above technical means, regarding the operation of the upper mechanism, when the door is opened, the second guide rail and the door are moved toward the outside of the vehicle along the first guide rail by the operation of the opening / closing cylinder and the entrance / exit cylinder. Then, after that, the slide member slides in the opening direction along the second guide rail by the operation of the opening / closing cylinder, and accordingly, the door moves outside the side wall of the vehicle in the opening direction, while the door is closed. , The opening / closing cylinder and the entrance / exit cylinder perform operations opposite to the above, so that the door closes along a predetermined path, and when the door is fully closed, the upper part of the door is attracted inward by the operation of the entrance / exit cylinder. .

Regarding the operation of the lower mechanism, when the door is opened, first, the pair of link members is rotated outward by the operation of the auxiliary cylinder, and at the same time, the support frame is also translated outward by the vehicle.
Along with this, the second engaging body moves outwardly of the vehicle along the bent portion of the second guide portion, and the first engaging body moves outwardly of the vehicle without moving relative to the first guide portion. Therefore, the door is once taken out of the vehicle. After that, the first engaging body and the second engaging body are moved in the opening direction along the first guide portion and the second guide portion by the operation of the opening / closing cylinder of the upper mechanism, and are engaged and held by the holding member. When the door slides in the opening direction, the door moves in the opening direction in parallel with the vehicle side wall while keeping a predetermined distance. On the other hand, when the door is closed, the opening / closing cylinder operates in the opposite direction to the above and the auxiliary cylinder also operates in the opposite direction to move the lower part of the door along the predetermined path, and when the door is fully closed. The lower part of the door is pulled inward by the operation of the auxiliary cylinder.

Further, regarding the control device for controlling the movement of the door described above,
When the door moves to the outside of the vehicle during the door opening operation, the solenoid valve is switched to the open position and the switching valve is at the predetermined position, so that the pressure fluid from the fluid pressure source passes through the first pipeline. While being supplied to one port of the open / close cylinder,
The auxiliary cylinder is supplied to one port of the inlet / outlet cylinder via a first branch pipeline branched from the first pipeline, and is further supplied to the auxiliary cylinder via a first auxiliary branch pipeline branched from the first branch pipeline. It is supplied to one port. As a result, the rods of the opening / closing cylinder, the loading / unloading cylinder, and the auxiliary cylinder are actuated, and the door is carried out to the outside of the vehicle. In this way, when the door is moved outside in the vehicle and moves in the opening direction along the vehicle side wall, only the switching valve is switched to the other position from the above state, so that the fluid pressure source The pressure fluid is supplied to one port of each of the opening / closing cylinder, the inlet / outlet cylinder and the auxiliary cylinder via the first conduit, and the second branch conduit is connected to the other port of both the inlet / outlet cylinder and the auxiliary cylinder. The door is shut off only in the port direction, so that the pressing force to the outside of the vehicle acts appropriately on the door, and therefore the door reliably maintains a predetermined distance from the vehicle side wall. Will move in the opening direction. Then, when the door moves in the closing direction along the side wall of the vehicle after the door is fully opened, only the solenoid valve is switched to the closed position from the above state, and the pressure fluid from the fluid pressure source passes through the second pipeline. It is supplied to the other port of the open / close cylinder via the second branch pipe line that is branched from the second pipe line in the other port direction of both the inlet / outlet cylinder and the auxiliary cylinder. And the first branch pipe is blocked in the direction of the first pipe so that the door maintains a predetermined space between the side walls of the vehicle while being prevented from moving inward. While moving, it will move in the opening direction. Furthermore, when the door moves inward in the vehicle after finishing the movement in the closing direction along the vehicle side wall, only the switching valve switches from the above state to the initial predetermined position,
The pressure fluid from the fluid pressure source is supplied to the other port of the opening / closing cylinder via the second conduit and at the same time is supplied to the other port of the inlet / outlet cylinder via the second branch conduit.
Further, it is supplied to the other port of the auxiliary cylinder via the second auxiliary branch line. Thereby, the rods of the opening / closing cylinder, the loading / unloading cylinder, and the auxiliary cylinder are actuated, so that the door is pulled inward of the vehicle.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

First, the schematic structure of the upper mechanism of the plug door device according to the present invention will be described. As shown in FIG. The first guide mechanism 4,4 for guiding the movement in the ab direction in the figure) and the opening / closing direction (the cd direction in the figure) along the vehicle side wall 1 of the door 3 suspended from the first guide mechanism 4,4. And second guide mechanisms 5, 5 for guiding the movement of the. The first guide mechanism 4 is fixed to a mounting base (not shown) mounted to a vehicle-side member above the opening 2 on the vehicle inner side, and is arranged at an inclination angle of 45 degrees with respect to the vehicle side wall 1. The first guide rail 4a and a slide body 4b slidably held along the first guide rail 4a in the ab direction are provided. The second guide mechanism 5 extends in parallel with the door 3 and in the horizontal direction. Second guide rail 5a, a pair of sliding pieces 5b, 5b held slidably in the opening / closing direction (cd direction) along the second guide rail 5a, and fixed by these sliding pieces 5b, 5b And the slide member 8 that is formed. The slide member 8
The door-end slide member 8a and the door-end slide member 8b are joined and fixed. And the first guide mechanism
The second guide rails 5a of the second guide mechanism 5 are suspended from the sliding bodies 4b, 4b of the 4, 4 via the brackets 6, 6, and the slide members 8 of the second guide mechanism 5 ( A door bracket 7 fixed to the upper part of the door end side end of the door 3 is attached to the door end side slide member 8a). Furthermore,
An opening / closing cylinder 9 extending in the horizontal direction in parallel with the door 3 is provided immediately below the first guide mechanisms 4, 4 in the holding bracket 1.
The opening and closing cylinder 9 is fixedly supported on the mounting base through 0 and 10, and is fixed to the right end of the piston lot 9a of the opening / closing cylinder 9 at the right end of the slide member 8 (door end side slide member 8b). The tip fitting 11 is connected so as to be relatively movable only in the direction orthogonal to the cd direction (vertical direction in the figure). Further, the vehicle side wall 1 is provided between the pair of first guide mechanisms 4, 4.
An inlet / outlet cylinder 14 arranged at an inclination angle of 45 degrees with respect to is fixedly supported on the base, and a tip of a piston rod 14a of the inlet / outlet cylinder 14 is attached to a second guide rail 5a of the second guide mechanism 5. It is fixed.

Therefore, when the opening operation of the door 3 is started from the fully closed position, the piston rods 9a and 14a of both the opening / closing cylinder 9 and the loading / unloading cylinder 14 project and move, so that the door 3 and the second
The guide mechanism 5 is guided by the first guide mechanism 4, 4 and moves to the outside of the vehicle (direction a). Then, the access cylinder 14
When the piston rod 14a of No. 2 reaches the moving end in the direction a, the door 3 enters the state shown by the symbol (a) in FIG.
The guide mechanism 5 is in the state shown by the symbol (B) in the figure. After the door 3 has moved in the a direction by a predetermined dimension in this way, only the piston rod 9a of the opening / closing cylinder 9 projects to cause the sliding pieces 5b and 5b of the second guide mechanism 5 and the slide member 8 to open. Direction (C direction), and along with this, door 3
Also moves in the opening direction. When the door 3 is in the fully opened state, the door 3 is in the state shown by the reference numeral (a ') in the figure and the second guide mechanism 5 is in the state shown by the reference numeral (b') in the figure. When the door 3 is closed, the reverse operation is performed.

In addition to the above configuration, the upper mechanism according to this embodiment includes a closed position support mechanism 15 for surely retracting and supporting the door 3 in the closed position, and a transition of the door 3 from the a direction movement to the c direction movement. Point and a transition point from the movement in the d direction to the movement in the b direction are detected, the passage state of the control device (fluid supply / discharge circuit) described later is switched, and the inlet / outlet cylinder 14 is moved according to the ab direction movement and the cd direction movement of the door 3. A switching means 51 for switching the piston rod 14a between the unlocked state and the locked state, and a carry-out support mechanism 80 for reliably carrying out the carry-out movement of the door 3 in the ab direction are provided.

As shown in FIGS. 2 to 4, the closed position support mechanism 15 includes a locking member 16 and a protruding member 17, and the protruding member 17
An abutting portion (roller) 18 is attached to the tip of 17.
The engagement surface 16a of the locking member 16 (see FIG. 2) is an inclined surface that is the same as the moving direction (ab direction) of the door 3 with respect to the inside and outside of the vehicle. At the position, the engagement surface 16a and the peripheral surface of the contact portion 18 are tightly engaged with each other. Therefore, when the door 3 is in the closed position and the pressing force in the vehicle vertical direction acts on the door 3, the locking member is
Since the engagement surface 16a of 16 and the contact portion 18 at the tip of the protruding member 17 are engaged with each other, the door 3 is securely supported in the closed position. Further, since the engaging surface 16a is an inclined surface that is the same as the ab direction, it does not interfere with the normal opening / closing operation of the door 3.

The switching means 51 is, as shown in FIG.
A lock member 50 for locking the piston rod 14a of 14 is provided, and the lock member 50 is in the unlocked position and the door 3 moves in the cd direction while the door 3 is located in the movement path in the ab direction. It is switched to take the lock position while it is located on the route. Further, the switching means 51 includes a detection lever 53 that swings with the movement of the control plate 52 at the time when the door 3 shifts from the movement path in the ab direction to the movement path in the cd direction, and the detection lever 53 swings. And a transmission mechanism 54 for converting the lock member 50 into a protruding / retracting motion. The control plate 52 includes a slide member 8 (door end side slide member 8
It is fixed to the lower surface of (a) (see FIG. 6), and its plan view shape is a pentagonal shape having an inclined surface 52a parallel to the ab direction. The base end of the detection lever 53 is fixed to a support shaft 56 that is rotatably held in a valve built-in block 55 that contains a switching valve 115, which will be described later. A guide roller 57 that comes into contact with and separates from the control plate 52 is attached. In addition, as shown in FIG. 7, the transmission mechanism 54 includes an auxiliary lever 58 that is fixed to the support shaft 56 that is rotatably held by the valve built-in block 55 and that swings integrally with the detection lever 53. A connecting rod 59 whose one end is rotatably connected to the tip of the auxiliary lever 58, a cam lever 60 whose one end is rotatably connected to the other end of the connecting rod 59, and one end of which is the auxiliary The lever 58 has a tension coil spring 62 which is locked to the tip of the lever 58 and the other end of which is locked to the pin 61. Then, the cam lever 60 has the lock member 50.
Is held slidably in the left-right direction inside a storage block 64 that stores, and when the cam lever 60 slides to the right, the lock member 50 protrudes as shown in the drawing and the piston rod of the in-and-out cylinder 14 When the cam lever 60 slides to the left while the backward movement of the cylinder 14a is blocked, the lock member 50 is retracted from the state shown in the drawing to move in and out the cylinder.
The piston rod 14a of 14 is allowed to project and retreat. Further, a fan-shaped cam forming body 74 is integrally attached to the detection lever 53, and a cam surface formed on the rear surface side of the fan-shaped cam forming body 74 in FIG. By moving, the switching valve 115 built in the valve built-in block 55 can be switched. The fifth
In the figure, the portions with parallel diagonal lines (also in FIG. 1) schematically show the direct or indirect fixing points to the mounting base 1χ, and the right side of the cylinder 14 in the same figure. The solenoid valve 106 described later
And a silencer 69 connected to the solenoid valve 106.

According to the configuration of the switching means 51 as described above, the detection lever is moved by moving the door 3 from the moving end in the a direction to the c direction.
53 swings to the right and reaches the position indicated by the symbol Z from the symbols X and Y in the figure, and accordingly, the cam lever 60 moves to the right and the lock member 50 assumes the locked position. With the lock member 50 taking the lock position in this way, the door 3 can be reliably held at a predetermined distance from the vehicle side wall 1.

As shown in FIGS. 5 and 8, the carry-out support mechanism 80 includes a guide plate 81 fixedly supported with respect to the mounting base 1χ and having a guide surface 81a, and the slide member 8 (door end side slide member). 8a) is rotatably held and is in contact with the guide surface 81a and is rollable.
The guide surface 81a of the guide plate 81 has a direction (a
-b direction) and the guide surface 81a
The end position in the a direction of is the position corresponding to the transition point between the movement of the door 3 in the ab direction and the movement of the door 3 in the cd direction. Therefore, the door 3
When the opening operation starts from the fully closed state, the guide surface 81a
Unless the roller member 82 has moved along
This means that the door 3 cannot move in the direction.
The collision between the door 3 and the vehicle side wall 1 due to the movement in the direction c during the movement in the direction is effectively prevented. Regarding the guide plate 81, the guide surface 81a
May be extended linearly from the end position in the a direction to the position corresponding to the fully open position in the c direction. In such a case, the piston rod 14a of the loading / unloading cylinder 14 may be moved as described above. No need to lock. Further, contrary to the above configuration, the guide plate 81 may be fixed to the slide member 8 and the roller member 82 may be fixedly supported on the mounting base 1χ.

Next, the structure of the lower mechanism of the plug door device according to the present invention will be described. As shown in FIGS. 9 to 12, the lower mechanism is supported on the upper surface of the box body 20 fixed to the vehicle lower wall 1a. Axis 21
A pair of link members 22a, 2 arranged in parallel via a, 21b
2b and the support shaft 23 at the other end of the pair of link members 22a, 22b.
A link mechanism 25 including a support frame 24 rotatably connected via a and 23b is provided. The support frame 24 has a rail forming plate 2 having an L-shaped cross section, which extends in the opening / closing direction (cd direction in FIG. 9).
6 is fixed, the rail forming body 26 is formed with a first guide portion 27 extending in the cd direction, and the box body 20 has its door closing side end portion bent inward. The second guide portion 28 is formed as a bent portion 28a extending inward and outward of the vehicle (ab direction in FIG. 9). A staircase-shaped bracket 29 is fixedly provided at the end of the door 3 on the door end side, and a high step portion of the bracket 29 is engaged with (contacts with) the first guide portion 27. An engaging body 31 is attached, and a second engaging body 32 that engages with the second guide portion 28 is attached to the lower step portion. Further, a stopper member 33 having a U-shape in plan view is fixedly attached to the door closing side end of the rail forming plate 26 (first guide portion 27) fixed to the support frame 24. Has a restricting surface 33a that engages with the first engaging body 31 when the door is closed. Further, this lower mechanism comprises a holding member 34 fixed to the door opening side end of the support frame 24 (rail forming plate 26) and a linear rail body 35 fixed to the door 3 and extending in the cd direction. A slide mechanism 36 is provided, and the linear rail body 35 is engaged with the holding member 34 slidably only in the cd direction. Furthermore, the vehicle lower wall 1a
The base 20 of the auxiliary cylinder 41 is rotatably connected to the box body 20 fixed to the box body 20 via a bracket 40.
One end of the link member 22b on the door opening side (the right side in the figure) of the pair of link members extends, and the extending portion 22b 'and the tip of the piston rod 41a of the auxiliary cylinder 41 rotate. It is movably connected. The projecting movement and the retreating movement of the piston rod 41a of the auxiliary cylinder 41 are performed in synchronization with the operation of the above-mentioned moving cylinder 14.

According to the configuration of the lower mechanism as described above, the auxiliary cylinder 41 and the operation of the loading / unloading cylinder 14 and the opening / closing cylinder 9 are performed.
When the piston rod 41a of the door 3 moves backward, the second engaging body 32 attached to the bracket 29 of the door 3 moves in the a direction along the bent portion 28a of the second guide portion 28, and the bracket of the door 3 also. The first engaging body 31 attached to 29 also moves in the a direction, but at this time, the first engaging body 31 moves while being in contact with the first guide portion 27 of the rail forming plate 26. The support frame 24 to which the rail forming plate 26 is fixed moves in parallel in the a direction while rotating the pair of link members 22a and 22b. Then, at the time when the movement of the door 3 in the direction a is completed, that is, when the movement of the second engagement body 32 along the bent portion 28a is completed, the door 3 is in the state shown by the symbol (a) in FIG. When the door 3 moves in the c direction from such a state, the second engaging body 32 moves along the linear portion of the second guide portion 28, and at the same time the first engaging body 31 also moves in the first guide portion.
The linear rail body 35 of the door 3 moves along the line 27 and is guided by the holding member 34 of the support frame 24 (rail forming plate 26) to move. When the moving end in the c direction is reached, the door 3 is in the state indicated by reference numeral (a ') in FIG. 10, that is, the fully open state. On the other hand, when the door 3 is closed from such a fully opened state, the operation reverse to the above is performed,
When the door 3 moves in the b direction during this closing operation, that is, when the state shown by the reference numeral (a) in FIG. 10 shifts to the state shown in FIG. 9, the piston rod of the auxiliary cylinder 41 is
When the first engaging body 31 is fitted between the regulating surface 33a of the stopper member 33 and the first guide portion 27 as the 41a projects and moves to a fully closed state, the first engaging body 31 and the regulating surface 33a. And are in close contact. Then, after that, while the door 3 is held in the fully closed state, the link member 22b, and thus the support frame 24 and the door 3 are maintained in a state of being urged inward by the operation of the auxiliary cylinder 41. The place where the auxiliary cylinder 41 is attached is the link member on the door opening side (right side) as described above.
Not limited to 22b, it may be attached to the link member 22a on the door closing side (left side) or to both link members 22a and 22b. More preferably, the door 3 is more preferably airtight when fully opened. The auxiliary cylinder 41 is attached to the link member 22a on the closing side, and the above-described closed position support mechanism 15 is attached to the door bottom side at the lower part of the door.

Next, a control device for controlling the opening / closing cylinder 9, the inlet / outlet cylinder 14, and the auxiliary cylinder 41, that is, a fluid supply / discharge circuit will be described.

That is, as shown in FIG. 13, the fluid supply / discharge circuit includes a first pipeline 101 communicating with one port 100 of the opening / closing cylinder 9 and a second pipeline 103 communicating with the other port 102, and a fluid pressure source 10.
It has a main pipe line 105 leading to 4 and a solenoid valve 106 for selectively switching and connecting the first and second pipe lines 101, 103 to the main pipe line 105 and the atmosphere opening portion E χ. A first branch pipeline 107 branched from the first pipeline 101 is connected to one port 108 of the inlet / outlet cylinder 14, and a second branch pipeline 1 branched from the second pipeline 103.
09 is connected to the other port 110 of the inlet / outlet cylinder 14. Further, the first auxiliary branch pipeline 111 branched from the first branch pipeline 107 is connected to one port 112 of the auxiliary cylinder 41, and the second auxiliary branch pipeline 113 branched from the second branch pipeline 109 is It is connected to the other port 114 of the auxiliary cylinder 41. Then, between the branch portion S of the first pipeline 101 and the branch portion t of the first auxiliary branch pipeline 111 in the first branch pipeline 107, and the second pipeline 103 in the second branch pipeline 109. Between the branch portion u and the branch portion v of the second auxiliary branch pipeline 113,
The switching valve 115 described above is arranged. This switching valve 115 is
It is a two-position four-port type, and has two internal passages 116 and 117 that can communicate with each other at one position and two check valves 118 and 119 having different directions at the other position.
Then, by the operation of the switching valve 115, both the first branch pipe line 107 and the second branch pipe line 109 are in the communicating state while the door 3 is located on the moving path in the vehicle inward / outward direction (ab direction). While the door 3 is located in the movement path in the opening / closing direction (cd direction), the first branch pipeline 107 is blocked only in the first pipeline 101 direction, and the second branch pipeline 109 enters and exits. Ports 110 and 11 on the other side of both cylinder 14 and auxiliary cylinder 41
The shutoff state is set only in four directions.

According to the configuration of the fluid supply / discharge circuit as described above, when the door 3 is fully closed, the solenoid valve 106 and the switching valve 115 are in the positions shown in FIG. It is supplied to the other port 102 of the opening / closing cylinder 9 via a pipe 103 and also enters / exits the cylinder 14 via a second branch pipe 109.
Is supplied to the other port 110 of the second auxiliary branch line 113
While being supplied to the other port 114 of the auxiliary cylinder 41 via one side, one port 100, 108, 112 of each of the opening / closing cylinder 9, the inlet / outlet cylinder 14 and the auxiliary cylinder 41 is connected to the atmosphere opening portion E.
It is in communication with χ. As a result, the piston rod 9a of the opening / closing cylinder 9 is urged in the closing direction (d direction) and the piston rod 14a of the loading / unloading cylinder 14 moves toward the inside of the vehicle (b).
Direction), a pressing force to the inside of the vehicle acts on the upper portion of the door 3 and the piston rod 41 of the auxiliary cylinder 41
a is urged in the protruding direction, and the link member 22b and the support frame 24
As a result, the pressing force to the inside of the vehicle acts on the lower portion of the door 3, and the airtightness when the door 3 is fully closed is effectively enhanced.

When the door 3 moves outward (direction a) from such a state, only the solenoid valve 106 is switched from the position shown in FIG. 13 to the other position, so that the opening / closing cylinder 9 and the entrance / exit cylinder 14 are moved. And one port of each of the auxiliary cylinders 41
The pressure fluid is supplied to 100, 108, 112, and the other ports 102, 110, 114 of the respective other ports are brought into communication with the atmosphere opening portion Ex, and accordingly, the piston rod 9a of the opening / closing cylinder 9 is connected.
Moves in the opening direction (direction c) and at the same time, the cylinder
The 14 piston lots 14a project outwardly of the vehicle (direction a) and the piston rod 41a of the auxiliary cylinder 41 moves backward to move from the link member 22b to the support frame 24 and further to the lower portion of the door 3 outwardly of the vehicle (direction a). The urging force of. Furthermore, the door 3 completes the movement to the outside of the vehicle (direction a) and opens (direction c).
When the movement to the switching valve is started, the fluid supply / discharge circuit is changed from the above state as the detection lever 53 swings.
115 switches to the other position. As a result, the fluid pressure source 1
The pressurized air that has reached the first branch pipe line 107 from 04 through the first pipe line 101 passes through one check valve 118 of the switching valve 115 and is supplied to one port 108 of the inlet / outlet cylinder 14 and At the same time as being supplied to one port 112 of the auxiliary cylinder 41 via the auxiliary branch pipe line 111, the inlet / outlet cylinder 14 and the auxiliary cylinder
The other ports 110 and 114 on both sides of 41 are in communication with the atmosphere opening portion E χ via the other check valve 119 of the switching valve 115. At this time, the piston rod 9a of the opening / closing cylinder 9 continues to project in the opening direction (direction c), and the door 3 also moves in the opening direction accordingly. Also, the auxiliary cylinder 41 surely biases and holds the upper and lower portions of the door 3 at the take-out position outside the vehicle. Then, when the door 3 moves in the closing direction (direction d) after the door 3 is fully opened, the fluid supply / discharge circuit operates from the above state to the solenoid valve.
The position of only 106 is switched, and the pressure fluid from the fluid pressure source 104 is supplied to the other port 102 of the opening / closing cylinder 9 via the second pipe 103, and accordingly, the piston rod 9a of the opening / closing cylinder 9 is changed. Although it moves backward in the closing direction (d direction), at this time, the reverse flow of the pressure fluid from one port 108, 112 of both the inlet / outlet cylinder 14 and the auxiliary cylinder 41 toward the atmosphere opening portion E χ of the switching valve 115. It is blocked by one check valve 118, and the other port of both the inlet / outlet cylinder 14 and the auxiliary cylinder 41 from the fluid pressure source 104.
Outflow of the pressure fluid toward 110 and 114 is blocked by the other check valve 119 of the switching valve 115. Therefore, under such a condition, the piston rod 14a of the entrance / exit cylinder 14 is made to retreat and the piston rod 41a of the auxiliary cylinder 41 is made to project by the pressing force to the inside of the vehicle acting on the door 3. Even one port 1 of both cylinders 14,41
Around 08,112 is pressure boosted and the other port 110,114
The negative pressure in the vicinity prevents the door 3 from moving inward. Further, the door 3 is closed (d
Direction) and the movement inward of the vehicle (direction b) is started, the fluid supply / drain circuit is moved from the above state in accordance with the swing of the detection lever 53 in the opposite direction. Switching valve 115
Only the position of the chisel is switched to the state shown in Fig. 13,
Therefore, the piston rods 9a and 14a of both the opening / closing cylinder 9 and the loading / unloading cylinder 14 move backward, and at the same time, the auxiliary cylinder 41
The piston rod 41a of the above-mentioned makes a protruding movement, so that the upper part and the lower part of the door 3 surely move inward of the vehicle.

〔The invention's effect〕

As described above, according to the present invention, when the door is moved in and out of the vehicle, the upper part of the door is driven in and out of the vehicle by the operation of the opening / closing cylinder and the in / out cylinder of the upper mechanism, and at the same time, the lower part of the door is also an auxiliary cylinder of the lower mechanism. By this operation, the vehicle is positively driven inward and outward, and the movement of the door inward and outward of the vehicle is ensured. Further, when the door is moved outside in the vehicle in the opening / closing direction along the side wall of the vehicle, the upper and lower parts of the door are prevented from moving inward by the action of the cylinder, and the lower part of the door is also an auxiliary cylinder. Movement of the vehicle will prevent it from moving inward,
Contact between the door and the side wall of the vehicle is reliably prevented.
Furthermore, when the door is fully closed, the upper part of the door is urged inward by the operation of the cylinder, and at the same time the lower part of the door is urged inward by the operation of the auxiliary cylinder. In this case, extremely high airtightness can be secured.

[Brief description of drawings]

1 to 13 show an embodiment of the present invention.
FIG. 1 is a schematic plan view showing an upper structure of a plug door device according to the present invention, FIG. 2 is an enlarged cross-sectional plan view showing an essential part of a closed position support mechanism provided in the upper mechanism, and FIG. FIG. 4 is an enlarged front view of an essential part showing FIG. 4, FIG. 4 is an enlarged vertical side view of an essential part showing the closed position support mechanism, and FIG. 5 is a schematic plan view showing a switching means and a carry-out support mechanism provided in the upper part mechanism. 5 is a vertical cross-sectional side view taken along the line II-II in FIG. 5, FIG. 7 is a bottom view showing the configuration of the switching means, and FIG. 8 is a vertical side view taken along the line III-III in FIG.
FIG. 9 is a plan view showing a state of the lower mechanism of the plug door device according to the present invention when the door is fully closed, FIG. 10 is a plan view showing a state of the lower mechanism when the door is opened, and FIG.
FIG. 12 is an enlarged side view corresponding to the drawing, FIG. 12 is an enlarged side view corresponding to FIG. 10, and FIG. 13 is a schematic configuration diagram showing a control device of the plug door device according to the present invention. 1 ... Vehicle side wall 2 ... Opening 3 ... Door 4a ... First guide rail 5a ... Second guide rail 8 ... Slide member 9 ... Open / close cylinder 14 ... In / out cylinder 22a, 22b ... Link member 24 ... Support frame 27 ... First guide Part 28 ... Second guide part 31 ... First engaging body 32 ... Second engaging body 34 ... Holding member 41 ... Auxiliary cylinder 101 ... First conduit 103 ... Second conduit 104 ... Fluid pressure source 106 ... Solenoid valve 107 ... First branch pipeline 109 ... Second branch pipeline 111 ... First auxiliary branch pipeline 113 ... Second auxiliary branch pipeline 115 ... Switching valve

Claims (2)

[Claims] 1. An upper portion which is configured to move along a vehicle side wall after being taken out of the vehicle from an opening portion of the vehicle side wall, and which is provided above the opening portion to open and close the door. A plug door device comprising a mechanism and a lower mechanism provided below the opening for guiding opening / closing movement of a door, wherein the upper mechanism is attached to a vehicle-side member above the opening, and A first guide rail for guiding movement in the vehicle inward / outward direction; a second guide rail suspended from the first guide rail for guiding movement of the door in the opening / closing direction along the vehicle side wall; A slide member that slides in the opening / closing direction along the second guide rail, an opening / closing cylinder that is connected to the slide member to move the door in the opening / closing direction, and a second guide that is connected to the second guide rail. A rail and a loading / unloading cylinder for moving the door along the first guide rail are provided, and the lower mechanism is disposed in parallel with a position corresponding to a door front side and a door tail side of the door and is below the opening. A pair of link members, one end of each of which is connected to the vehicle-side member and the other end of which is connected to the support frame, and a pair of link members that are attached to the support frame so that the door is slidably held only in the opening / closing direction. A holding member, a first guide portion formed on the support frame and extending in the opening / closing direction, a vehicle-side member extending in the opening / closing direction, and a door closing side end portion of which is bent inward of the vehicle. A second guide portion, a first engagement body and a second engagement body which are attached to a door end side end portion of a lower portion of the door and are engaged with the first guide portion and the second guide portion, respectively, and below the opening portion. The pair of phosphorus is attached to a vehicle-side member inside the vehicle. A plug door, the rod portion of which is connected to at least one position of the frame member or the support frame, and an auxiliary cylinder for moving the link member or the support frame to move the lower part of the door inward and outward of the vehicle. apparatus. 2. The plug door device according to claim 1, wherein either one of a first conduit communicating with one port of the opening / closing cylinder and a second conduit communicating with the other port and a fluid pressure source. An electromagnetic valve is provided for switching and connecting to a main pipeline communicating with the first pipeline, the first branch pipeline is branched from the middle of the first pipeline, the first branch pipeline is connected to one port of the inlet / outlet cylinder, and the first pipeline is connected to the first pipeline. The first auxiliary branch conduit is branched from the middle of the first branch conduit to connect the first auxiliary branch conduit to one port of the auxiliary cylinder, and the second branch conduit is connected from the middle of the second conduit. The second branch pipe is branched and the second branch pipe is connected to the other port of the inlet / outlet cylinder, and the second auxiliary branch pipe is branched from the middle of the second branch pipe to connect the second auxiliary branch pipe to the auxiliary cylinder. Connect to the other port and connect to the first port in the first branch line. A door is provided between the branch portion of the pipeline and the branch portion of the first auxiliary branch pipeline and between the branch portion of the second pipeline and the branch portion of the second auxiliary branch pipeline in the second branch pipeline. The first branch pipeline and the second branch pipeline are brought into communication with each other when the vehicle is located on the moving path in the vehicle inward / outward direction, and the first branch pipeline is opened when the door is located on the moving path in the opening / closing direction. A plug valve device is provided, which is provided with a switching valve that is closed only in one pipe line direction and in which the second branch pipe line is closed only in the other port direction of the inlet / outlet cylinder and the auxiliary cylinder. Control device.