JPH0781459B2 - Plug door device - Google Patents

Description

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

[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, since the lower door and the lower rail are engaged only on the door tip side of the door, the lower door end of the door is opened and closed when the door is opened and closed. There is rattling on the side, and when the door is fully opened, the door cannot be firmly supported, and when an external force acts on the door, the door easily swings in and out of the vehicle.

Further, in the one disclosed in the above publication, the working shaft for interlocking the upper and lower two levers is an essential component for the construction of the lower rail, and the working shaft is rotatably held. It is necessary to attach a bearing or the like 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 a plug door device having an upper mechanism of this kind, what kind of structure is optimal for securing the airtightness and the certainty of opening / closing operation by guiding and moving the lower part of the door? It becomes a problem.

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. It is a technical subject to ensure sufficient airtightness and certainty of opening / closing operation without inviting.

[Means for Solving the Problems]

A specific means for achieving the above technical problem is that the door is once brought out of the vehicle through an opening in the side wall of the vehicle and then moved along the side wall of the vehicle. In the plug door device, an upper mechanism is provided above the opening portion to open and close the door, and a lower mechanism is provided below the opening portion to guide the opening and closing movement of the door. A first guide rail attached to a member on the upper vehicle side of the opening to guide movement of the door in and out of the vehicle; and a movement of the door suspended in the first guide rail in the opening / closing direction along the vehicle side wall. A second guide rail for guiding, a slide member that is connected to the door and slides in the opening / closing direction along the second guide rail, and an opening / closing mechanism that is connected to the slide member and moves the door in the opening / closing direction. And a loading / unloading cylinder that is connected to the second guide rail and moves the door along with the second guide rail along the first guide rail, and the lower mechanism includes a door end side and a door butt side of the door. A pair of link members that are arranged in parallel with each other and that are connected in parallel to the lower vehicle-side member of the opening and one end of each is connected to the support frame and the other end of the support frame. A holding member that is attached and that is positioned at least on the rear side of the door when the door is closed and that holds the door slidably only in the opening and closing direction; and a first guide portion that is formed in the support frame and extends in the opening and closing direction. A second guide portion formed in a vehicle-side member below the opening portion in the vehicle interior, extending in the opening / closing direction, and having a door closing side end portion thereof bent inwardly of the vehicle; Attached to the first guide portion and the second guide portion. Id unit there is to provided a first engagement body and a second engagement body which is engaged respectively slidably engaged to.

[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, at the time of opening the door, first, the pair of link members are rotated to the outside of the vehicle by the operations of the opening / closing cylinder and the moving cylinder, and at the same time, the support frame is also translated to the outside of the vehicle. Accordingly, the second engaging body moves outwardly of the vehicle along the bent portion of the second guide portion, and
The engagement body moves to the outside of the vehicle without moving relative to the first guide portion, and therefore the door is once taken out to the outside 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. By sliding the door in the opening direction,
The door moves parallel to the side wall of the vehicle in the opening direction while maintaining a predetermined distance. Then, when the door is in the fully opened state, the first tip end and the second tip end engage with the first guide part and the second guide part and hold the door end side end of the lower part of the door. Since the members are also engaged and held, they are firmly supported. On the other hand, when the door is closed, the open / close cylinder and the in / out cylinder operate in the opposite manner to the above, so that the lower part of the door moves along the predetermined path, and when the door is fully closed, the lower part of the door is closed. The first engagement body and the second engagement body are engaged with the first guide portion and the second guide portion with respect to the door end side end of the, and the door bottom side of the lower portion of the door is engaged with and held by the holding member. As a result, sufficient airtightness can be secured.

〔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 on the upper vehicle-side member of the opening 2 and with respect to the vehicle side wall 1.
It is composed of a first guide rail 4a arranged at an inclination angle of 45 degrees and a slide body 4b held slidably in the ab direction along the first guide rail 4a, and the second guide mechanism 5 is , A second guide rail 5a extending parallel to the door 3 and in the horizontal direction, and an opening / closing direction (c-
A pair of sliding pieces 5b, 5b held slidably in the (d direction)
And a slide member 8 fixedly mounted over these sliding pieces 5b, 5b. The slide member 8 is formed by coupling and fixing the door-end side slide member 8a and the door-end side slide member 8b. Then, the sliding member 4b of the first guide mechanism 4, 4
The second guide mechanism 5 is attached to 4b via brackets 6,6.
The second guide rail 5a is suspended, and the slide member 8 (door end side slide member) of the second guide mechanism 5 is suspended.
8a), a door bracket 7 fixed to the upper end of the door 3 is attached. Further, an opening / closing cylinder 9 extending in the horizontal direction in parallel with the door 3 is fixedly supported on the mounting base via holding brackets 10 and 10 just below the first guide mechanism 4, 4. The slide member 8 is provided at the right end of the piston lot 9a of the cylinder 9.
A tip fitting 11 fixed to the right end of the (door end slide member 8b) is connected so as to be relatively movable only in a direction orthogonal to the cd direction (vertical direction in the figure). Further, between the pair of first guide mechanisms 4 and 4, a loading / unloading cylinder 14 arranged at an inclination angle of 45 degrees with respect to the vehicle side wall 1 is fixedly supported on the base. rod
The tip of 14a is fixed to the second guide rail 5a of the second guide mechanism 5.

Therefore, when the door 3 starts the opening operation from the fully closed position, the piston rods 9a and 14a of both the open / close cylinder 9 and the in / out cylinder 14 project and move while their respective speeds are adjusted, so that the door 3 and The second guide mechanism 5 is guided by the first guide mechanisms 4, 4 and moves to the outside of the vehicle (direction a). Then, when the piston rod 14a of the loading / unloading cylinder 14 reaches a predetermined position, that is, when it reaches the moving end in the a direction, the door 3 is in the state shown by the symbol (a) in the figure and the second guide mechanism 5 is The state shown by the reference numeral (b) in FIG.
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 continues to project, so that the sliding pieces 5b, 5b of the second guide mechanism 5 and the slide member 8 move in the opening direction (C direction) along the second guide rail 5a. The door 3 moves and the door 3 also moves in the opening direction. When the piston rod 9a of the opening / closing cylinder 9 reaches the projecting end, that is, when it is in the fully open state, the door 3
Is in the state shown by the symbol (a ') in the figure and the second guide mechanism 5 is in the state shown by the symbol (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 locking the piston rod 14a and a take-out support mechanism 80 for surely carrying out the take-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 fixed to the upper part of the door 3 on the door tail side and a fixed member to the upper edge of the opening 2 in the vehicle side wall 1. Protruding member 17 installed
And a contact portion (roller) at the tip of the protruding member 17.
18 is installed. The engaging surface 16a of the locking member 16 (see FIG. 2) is a moving direction of the door 3 with respect to the inside and outside of the vehicle (a-
The same inclined surface as the (b direction), and at the closed position of the door 3 shown by the solid line in the figure, the engagement surface 16a and the peripheral surface of the contact portion 18 are closely engaged. . Therefore, when the door 3 is in the closed position, even if a pressing force in the vehicle outer vertical direction acts on the door 3, the door 3 is reliably supported in the closed position. Further, since the engaging surface 16a is the same inclined surface as the ab direction, it does not hinder the opening / closing operation of the door 3. The closed position support mechanism 15 does not have to be provided on the upper door end side of the door 3 as described above, but may be provided on the upper door end side, the lower door end side or the lower door end side of the door 3. Alternatively, it may be provided at two or more of these locations.

The switching means 51 is, as shown in FIG.
It has a lock member 50 for locking the piston rod 14a of 14, and the lock member 50 is in the unlocked position while the door 3 is located in the movement path in the ab direction and the door 3 has the movement path in the cd direction. The switch is switched to take the lock position while it is located at. Further, the switching means 51 is a detection lever 53 that swings with the movement of the control plate 52 when the door 3 moves from the movement path in the ab direction to the movement path in the cd direction.
And a transmission mechanism 54 for converting the swing of the detection lever 53 into the projecting / retracting movement of the lock member 50. The control plate 52
Is fixed to the lower surface of the slide member 8 (door end side slide member 8a) (see FIG. 6), and its plan view shape is ab.
It has a pentagonal shape having an inclined surface 52a parallel to the direction. The base end of the detection lever 53 has a switching valve 115 described later.
Is fixed to a support shaft 56 that is rotatably held in a valve built-in block 55 that has a built-in valve.
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 the support shaft rotatably held by the valve built-in block 55.
An auxiliary lever 58 that is fixed to 56 and 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, and one end of which is the connecting rod 59. A cam lever 60 rotatably connected to the other end,
It has a tension coil spring 62 having one end locked to the tip of the auxiliary lever 58 and the other end locked to the pin 61. The cam lever 60 is held inside the storage block 64 that stores the lock member 50 so as to be slidable in the left-right direction. When the cam lever 60 slides to the right, the lock member 50 is not shown. Thus, while the piston rod 14a of the loading / unloading cylinder 14 is prevented from moving backward, when the cam lever 60 slides to the left, the lock member 50 moves backward from the state shown in the drawing to move the piston rod 14a of the loading / unloading cylinder 14 Allows protrusion / retraction movement. 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. In addition, in FIG. 5, the portions marked with parallel diagonal lines are the same (also in FIG. 1),
FIG. 3 schematically shows a direct or indirect fixing portion to the mounting base 1χ, and a solenoid valve 106 described later and an atmosphere opening portion of the solenoid valve 106 are provided on the right side of the inlet / outlet cylinder 14 in FIG. A silencer 69 connected to Eχ is provided.

According to the configuration of the switching means 51 as described above, when the door 3 starts the opening operation from the fully closed state and moves from the moving end in the direction a to the direction c, the detection lever 53 swings to the right. From the X and Y to the position indicated by the Z, the cam lever 60 moves to the right along with this, and the lock member 50 takes a state in which it projects outward from the storage block 64 by a required dimension, that is, the lock position. It becomes a state. 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 plate 81
The door 3 cannot move in the c direction unless the roller member 82 moves along the guide surface 81a up to the end position of the guide surface 81a in the direction. Therefore, during the movement of the door 3 in the a direction, Door 3 caused by moving in the c direction
The collision between the vehicle side wall 1 and the vehicle side wall 1 is effectively prevented. With respect to the guide plate 81, the guide surface 81a may be linearly extended from the end position in the a direction to the position corresponding to the fully open position of the c direction. Piston rod of the cylinder 14 as described
You no longer need to lock 14a. It is needless to say that the guide plate 81 may be fixed to the slide member 8 and the roller member 82 may be fixedly supported with respect to the mounting base 1χ, contrary to the above configuration.

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, 22b whose one ends are rotatably connected via a, 21b, and the pair of link members 22a, 22b.
A link mechanism 25 including a support frame 24 rotatably connected to the other end of the support frame via support shafts 23a and 23b. The support frame
A rail forming plate 26 having an L-shaped cross section that extends in the opening / closing direction (the cd direction in FIG. 9) is fixed to 24, and the rail forming body 26 has a first guide portion 27 that extends in the cd direction. At the same time, the box body 20 is provided with a second guide portion 28 whose end portion on the door closing side is bent toward the inside of the vehicle to form a bent portion 28a extending in the vehicle interior / exterior direction (direction ab in FIG. 9). ing.
A bracket 29 is fixed to the end of the door 3 on the door end side. The bracket 29 has a first engagement body 31 that engages (contacts) the first guide portion 27 and the second engagement body 31. A second engaging body 32 that engages with the guide portion 28 is attached. In addition, the rail forming plate 26 (first guide portion) fixed to the support frame 24.
27) A stopper member 33 having a U-shape in plan view is fixedly provided at the end portion of the door closing side. The stopper member 33 regulates the movement of the support frame 24 in the a direction when the door is fully closed. The surface 33a is formed. Further, this lower mechanism is provided with 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. The linear rail body 35 engages with the holding member 34 slidably only in the cd direction. ing.

According to the configuration of the lower mechanism as described above, when the door 3 starts the opening operation from the fully closed state shown in FIG. 9 and FIG. 11 due to the operation of the above-mentioned inlet / outlet cylinder 14 and the opening / closing cylinder 9,
The second engaging body 32 attached to the bracket 29 of the door 3 is the second
While moving in the a direction along the bent portion 28a of the guide portion 28, the first engaging body 31 also attached to the bracket 29 of the door 3 also moves in the a direction. Since it moves in a state of contacting the first guide portion 27 of the forming plate 26, the support frame 24 to which the rail forming plate 26 is fixed moves in the a direction while rotating the pair of link members 22a, 22b. Translate to. Then, when the movement of the second engaging body 32 along the bent portion 28a is completed, the door 3 is in the state shown by the symbol (a) in FIG. 10, and when the door 3 is moved in the c direction from this state, , The second engaging body 32 moves along the linear portion of the second guide portion 28, the first engaging body 31 also moves along the first guide portion 27, and the linear rail body 35 of the door 3 is The support frame 24 (rail forming plate 26) is guided and moved by the holding member 34. When the moving end in the c direction is reached, the door 3 is in the fully open state indicated by the symbol (a ') in FIG. Then, when fully opened, the first engagement body 31 and the second engagement body 32 respectively have the first guide portion 27 and the second guide portion 27, respectively.
28. The linear rail body 35 is engaged with the holding member 28.
The door 3 is firmly supported by being engaged with the door 34. On the other hand, when the door 3 is closed from such a fully opened state, the operation opposite to the above is performed. However, when the door 3 is moved in the b direction during this closing operation, that is, FIG. In the case of shifting from the state shown by the symbol (a) to the state shown in FIG.
When the first engaging body 31 is fitted between the 33a and the first guide portion 27 and is in the fully closed state, the first engaging body 31 and the regulating surface 33a.
And are in close contact. When the door 3 is fully closed, the first engagement body 31 and the second engagement body 32 are engaged with the first guide portion 27 and the second guide portion 28, respectively, on the door tip side of the door 3, and For the Tojiri side of 3, a straight rail body
35 is engaged with the holding member 34, so that the door 3
The lower part of is supported at both ends,
Sufficient airtightness can be secured.

Next, a control device for controlling the open / close cylinder 9 and the inlet / outlet cylinder 14, 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. Then, the first branch pipeline 107 and the second branch pipeline 109
The above-mentioned switching valve 115 is arranged in this position. This switching valve 1
Reference numeral 15 is a two-position four-port type, which has two internal passages 116 and 117 capable of mutually communicating 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. The shut-off state is set only in the direction of the other port 110 of the cylinder 14.

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. 9 and the other port 110 of the inlet / outlet cylinder 14 is supplied.
As a result, a pressing force to the inside of the vehicle acts on the upper portion of the door 3.

When the door 3 moves to the outside of the vehicle (direction a) from such a state, only the position of the solenoid valve 106 is switched and the 14th
Due to the state shown in the figure, the pressure fluid is supplied to the ports 100 and 108 of the opening / closing cylinder 9 and the port of the inlet / outlet cylinder 14, respectively, and the ports 102 and 110 of the other ports are in communication with the atmosphere opening portion E χ, and Along with this, the piston rod 9a of the open / close cylinder 9 projects in the opening direction (direction c), and at the same time, the piston lot 14a of the loading / unloading cylinder 14 projects outward in the vehicle (direction a). Further, when the door 3 completes the movement to the outside of the vehicle (direction a) and starts to move in the opening direction (direction c), the fluid is generated as the detection lever 53 swings. The supply / discharge circuit is brought into the state shown in FIG. 15 by switching the switching valve 115 from the above state to the other position. As a result, the pressurized air that has reached the first branch pipeline 107 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, the other of the inlet / outlet cylinder 14 is connected. The port 110 of is in communication with the atmosphere opening portion E χ. At this time, the piston rod 9a of the opening / closing cylinder 9
Will continue to project in the opening direction (direction c), and the door 3 will also move in the opening direction accordingly, but during this movement, the entrance / exit cylinder 14 ensures that the upper part of the door 3 is outside the vehicle. It is urged and held in the other carry-out position. When the door 3 moves in the closing direction (direction d) after the door 3 is fully opened, the position of only the solenoid valve 106 in the fluid supply / discharge circuit is switched from the above state, and the pressure from the fluid pressure source 104 is changed. The fluid is supplied to the other port 102 of the open / close cylinder 9, and the piston rod 9a of the open / close cylinder 9 is moved backward in the closing direction (d direction) with this, but at this point, the inlet / outlet cylinder 14 A backflow of the pressure fluid from one port 108 toward the atmosphere opening portion Eχ is blocked by one check valve 118 of the switching valve 115, and the pressure fluid from the fluid pressure source 104 toward the other port 110 of the inlet / outlet cylinder 14 is supplied. Is blocked by the other check valve 119 of the switching valve 115. Therefore, even if a pressing force to the inside of the vehicle acts on the door 3 under such a state, the movement of the upper portion of the door 3 to the inside of the vehicle is blocked. When the door 3 completes the movement in the closing direction (direction d) and starts moving inward (direction b) in the vehicle, the detection lever 53 swings in the opposite direction. In the fluid supply / discharge circuit, the position of only the switching valve 115 is switched from the above state to the state shown in FIG. 13, so that the piston rods 9a and 14a of both the opening / closing cylinder 9 and the inlet / outlet cylinder 14 move backward, and the door 3 Will definitely move inward of the vehicle.

〔The invention's effect〕

As described above, according to the plug door device of the present invention, even if only the door end side end portion of the upper portion of the door is connected to the upper mechanism, the lower portion of the door is not closed when fully closed. The first engagement body and the second engagement body attached to the front end portion are engaged with the first guide portion and the second guide portion, and the holding member is engaged with the door tail side of the door bottom portion. The outside of the vehicle on the door end side and the door butt side of the vehicle is effectively prevented from moving out of the entire door, and the airtightness is improved.
When the door is fully opened, the first engagement body and the second engagement body on the door tip side are engaged with the first guide section and the second guide section and the holding member is engaged with the door tip side as in the above case. The door tip at the bottom of the door will be firmly supported at three points.

Furthermore, since the upper mechanism and the lower mechanism operate independently, the action shaft and the bearings for supporting the two upper and lower levers are not required as in the conventional case, and the external appearance and Inconvenience in layout will not occur.

[Brief description of drawings]

1 to 15 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 FIGS. 13 to 15 are schematic configuration diagrams showing the 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

Claims (1)

[Claims] 1. A door is constructed to move along the vehicle side wall after being taken out of the vehicle through an opening in the vehicle side wall, and is provided above the opening to open and close the door. A plug door device comprising an upper 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 the door is attached. A first guide rail for guiding the movement of the vehicle in and out of the vehicle, a second guide rail suspended from the first guide rail for guiding the movement of the door in the opening / closing direction along the vehicle side wall, and connected to the door. 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 9 in the opening / closing direction, and a slide member that is connected to the second guide rail. An entrance / exit cylinder for moving the door along with the first guide rail is provided together with a second guide rail, and the opening is provided in the lower mechanism in parallel with a position corresponding to a door front side and a door butt side of the door. A pair of link members each one end of which is connected to a lower vehicle side member and each other end of which is connected to a support frame, and a pair of link members attached to the support frame and at least on the door butt side of the door when the door is closed. A holding member that is located and engages and holds the door slidably only in the opening / closing direction, a first guide portion formed in the support frame and extending in the opening / closing direction, and a vehicle-side member in the vehicle interior below the opening. A second guide portion that is formed on the door and extends in the opening / closing direction and has a door closing side end portion that is bent inwardly of the vehicle; and the first guide portion and the second guide that are attached to the door tip side end portion of the lower portion of the door. First member slidably engaged with the respective parts A plug door device comprising a combination and a second engagement body.