JPH0781457B2 - Plug door device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plug door device, and more particularly, to moving a door in a take-out / draw-in direction with respect to an opening of a vehicle by projecting / retracting movement of a piston rod of an in / out cylinder. With
The present invention relates to a plug door device configured to move a door once taken out in an opening / closing direction along a vehicle side wall by a protruding / retracting movement of a piston rod of an opening / closing cylinder.

[Conventional technology]

Conventionally, the door is moved by both the movement in the take-out / draw-in direction (inside and outside of the vehicle) with respect to the opening of the vehicle and the movement in the opening / closing direction (along the side wall of the vehicle) of the door that intersects with the door. A plug door device configured to be driven is publicly known, and in an attempt to put it into practical use, the applicant of the present invention has proposed a plug door device as described below in a utility model registration application (Japanese Utility Model Application No. 63-151564). The structure of the device and its control device were proposed.

That is, the schematic structure of this plug door device is, as shown in FIG. 17, provided above the opening 2 formed in the vehicle side wall 1 of the vehicle and in the take-out direction of the door 3 (see FIG.
the first guide mechanism 4, 4 for guiding the movement in the b direction),
Second guide mechanisms 5 and 5 are provided that are suspended from the guide mechanisms 4 and that guide the movement of the door 3 in the opening / closing direction (the cd direction in the figure).
The first guide mechanism 4 is fixed to a mounting base (not shown) of the vehicle upper wall portion, and is provided with a guide body 4a disposed at an inclination angle of 45 degrees with respect to the vehicle side wall 1, and the guide body 4a. The second guide mechanism 5 is composed of a slide body 4b held slidably, and the second guide mechanism 5 is held slidably along the guide rail 5a extending parallel to the door 3 and in the horizontal direction. And a pair of sliding pieces 5b, 5b. The brackets 6, 6 are attached to the sliding bodies 4b, 4b of the first guide mechanism 4, 4.
The guide rails 5a of the second guide mechanism 5 are attached via the sliding guides 5b, 5b of the second guide mechanism 5
A door bracket 7 fixed to the upper portion of the door end portion of the door 3 is attached to the door via a guided member 8. The guided member 8 includes a lower door front side member 8a and an upper door rear end side member 8b which are fixedly integrated. Further, an opening / closing cylinder 9 extending in a horizontal direction in parallel with the door 3 is fixedly supported on the mounting base of the vehicle upper wall portion directly below the first guide mechanism 4, 4 via holding brackets 10, 10. This open / close cylinder 9
Tip fitting 11 attached to the tip of the piston rod 9a of
The auxiliary guide roller 12 is supported by the auxiliary guide roller 12, and the auxiliary guide roller 12 is attached to one end portion of the guided member 8 (the right end portion of the upper step rear end member 8b) in the front-back direction. It is sandwiched so as to be movable (inside and outside the vehicle). Further, between the pair of first guide mechanisms 4 and 4, an in-and-out cylinder 14 arranged at an inclination angle of 45 degrees with respect to the vehicle side wall 1 is mounted on a vehicle upper wall part mounting base via a holding bracket 15. It is fixedly supported, and the tip end of the piston rod 14a of the loading / unloading cylinder 14 is connected to the guide rail 5a of the second guide mechanism 5. In addition, in the same figure, the portions marked with parallel diagonal lines show the portions where the vehicle upper wall is fixed to the mounting base.

On the other hand, the control device for controlling the opening / closing cylinder 9 and the inlet / outlet cylinder 14, that is, the fluid supply / discharge circuit, as shown in FIG. 18 to FIG. The second pipeline 23 communicating with the closed port 22, the main pipeline 25 communicating with the fluid pressure source 24, and the first and second pipelines 2
1, 23 has a solenoid valve 26 for selectively switching and connecting the main pipe line 25 and the atmosphere opening portion Ex, and the first branch pipe line 27 branched from the first pipe line 21 is connected to the inlet / outlet cylinder 14. A second branch pipeline 29 connected to the carry-out side port 28 and branched from the second pipeline 23 is connected to the pull-in side port 30 of the loading / unloading cylinder 14, and a limit valve in the middle of the first branch pipeline 27.
31 are installed. As will be described later, the limit valve 31 takes a communication position while the door 3 is moving in the take-out / pulling-in direction, and takes a blocking position while the door 3 is moving in the opening / closing direction. In the state shown by the solid line in FIG. 20, the roller plunger 31a at the tip of the limit valve 31 is moved by the limit plate 32 attached to the other end of the guided member 8 (the left end of the lower door tip side member 8a). It has been compressed.

According to the above configuration, when the door 3 is fully closed, the solenoid valve
26 is switched to the position shown in FIG. 18 and the second pipe line 23 is connected to the main pipe line 25, both piston rods 9a and 14a are stopped at the retracted end position, and therefore the plug door device is set to the first position. The condition shown by the solid line in Fig. 17 is maintained. On the other hand, when the door 3 is opened, the solenoid valve 26 is switched to the position shown in FIG. 19 so that the first pipe line 21 is connected to the main pipe line 25. Accordingly, both the open / close cylinder 9 and the inlet / outlet cylinder 14 are connected. The piston rods 9a and 14a of FIG. 17 project and move while their respective speeds are adjusted by a flow rate adjusting valve (not shown), so that the door 3 and the second guide mechanism 5 are guided by the first guide mechanisms 4 and 4 and are shown in FIG. It is brought out in the a direction. 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 carry-out direction, the door 3 moves to the first position.
The state shown by the reference numeral (a) in FIG. 20 and the state of the second guide mechanism 5 shown by the reference numeral (b) in the same figure. Since the guide rail 5a and the guided member 8 do not move relative to each other when the door 3 is moved out, the roller plunger 31a of the limit valve 31 is kept compressed by the limit plate 32. In this way, after the door 3 moves in the carry-out direction by a predetermined dimension and reaches the moving end in that direction,
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 guided member 8 move in the opening direction along the guide rail 5a. Along with this, the door 3 also moves in the opening direction (direction c in FIG. 17), but at this time, the limit plate 32 separates from the roller plunger 31a of the limit valve 31, so that the roller plunger 31a is projected by the spring force. Then, the limit valve 31 is switched to the state shown in FIG. 20, and the first branch pipeline 27 is closed. As a result, the pressure fluid in the main pipeline 25 is transferred from the first pipeline 21 to the open side port of the opening / closing cylinder 9.
It will only be supplied to 20 cylinders, therefore 14 cylinders in and out
When the piston rod 14a is stopped and only the piston rod 9a of the opening / closing cylinder 9 is projecting and reaches the projecting end, that is, when the door 3 is fully opened, the door 3 is indicated by the symbol ( 2 ') and the second guide mechanism 5 is in the state shown by the reference numeral (B') in FIG.

On the other hand, when the door 3 is closed, the solenoid valve 26 is first switched from the position shown in FIG. 20 to the other position from the above fully opened state, and the pressure fluid in the main pipeline 25 is closed in the closing port 22 of the opening / closing cylinder 9. At the same time, the limit valve 31 of the first branch pipe line 27 and the inlet / outlet cylinder will be supplied to the inlet side port 30 of the inlet / outlet cylinder 14.
14 is closed, and the pressure receiving area of the piston 14b of the loading / unloading cylinder 14 is larger on the carry-out side port 28 side than on the pull-in side port 30 side by the amount corresponding to the axial cross-sectional area of the piston rod 14a. From this, this in-and-out cylinder
The piston rod 14a of 14 is temporarily held in the carry-out position, and only the piston rod 9a of the opening / closing cylinder 9 moves backward to move the door 3 in the closing direction (direction d in FIG. 20). And
When the door 3 reaches the position indicated by the reference numeral (a) in FIG. 20, the roller plunger 31a of the limit valve 31 is changed to the limit plate 32.
The limit valve 31 is compressed by and is switched to the position shown in FIG. 18, whereby the piston rods 9a and 14a of both the opening / closing cylinder 9 and the loading / unloading cylinder 14 move backward, which is the reverse of the time of carrying out. By this operation, the door 3 and the second guide mechanism 5 move in the retracting direction (direction of FIG. 17b), and when the moving end is reached, the door 3 is fully closed again.

[Problems to be Solved by the Invention]

However, according to the plug door device proposed by the present applicant, when the door 3 moves in the cd direction in FIG. 17,
The limit valve 31 simply shuts off the first branch pipe line 27 so that the piston rod 14
When the door 3 is closed in the direction shown in FIG. 17d, the pressure of the piston 14b of the loading / unloading cylinder 14 on the take-out port 28 side and the pull-in side port 30 side is received as described above. Since the piston rod 14a is held at the take-out position due to the difference in area, the holding force for holding the door 3 at the take-out position is extremely weak, and some external force acts on the door 3 in the pull-in direction. In this case, the door 3 comes into contact with the side wall 1 of the vehicle. Such a problem is caused by air leakage occurring in a sliding portion between the piston rod 14a of the loading / unloading cylinder 14 and the cylinder tube while the door 3 is held at the take-out position, or between the piston 14b and the cylinder tube. This is further promoted by air leakage or the like that occurs in the sliding portion. Incidentally, in order to avoid such a problem, the diameter of the piston rod 14a of the inlet / outlet cylinder 14 may be increased to increase the difference in the pressure receiving area of the piston 14b described above. According to this, not only new problems such as an increase in the size of the loading / unloading cylinder 14 and a high cost are caused, but also it is extremely difficult to obtain a sufficient holding force for reliably holding the door 3 in the take-out position. Further, when the door 3 is manually opened / closed without depending on the operation of the fluid supply / discharge circuit as described above, the fluid pressure source 24 and the solenoid valve 26.
And the piston rod 14a of the opening / closing cylinder 14 and the opening / closing cylinder 9 are manually operated by operating a three-way cock (not shown) provided between the first and second pipelines 21 and 23 to open the atmosphere. , 9a must be moved backwards and upwards. In this case, when the door 3 moves in the direction cd of FIG. 17, the piston 14b of the inlet / outlet cylinder 14 is connected to the carry-out port 28 side and the draw-in port 30 side. Since both of them are in an atmospheric pressure state, there is no fluid pressure for urging the door 3 to the take-out position. Therefore, even if an extremely small external force acts on the door 3 in the retracting direction, In a stable state, rattling etc. occurs, and the door 3
Causes contact with the vehicle side wall 1.

The present invention has been made in view of the above circumstances, and not only when the door is automatically opened and closed by the supply and discharge operation of the pressure fluid, but also when the door is manually opened and closed, the door and the vehicle side wall are SUMMARY OF THE INVENTION It is a technical object to provide a plug door device capable of reliably preventing the contact between the two.

[Means for Solving the Problems]

As a concrete means for achieving the above technical problem, there are an in-and-out cylinder for moving the door in the take-out direction with respect to the opening of the vehicle, and a door taken out from the opening along the vehicle side wall. In a plug door device including an opening / closing cylinder that moves in the opening / closing direction and a guide mechanism that guides each movement of the door due to the operation of the entrance / exit cylinder and the opening / closing cylinder, a lock position that locks the piston rod of the entrance / exit cylinder. And a lock member for taking a non-locked position to bring it into a non-locked state, and a non-locked position is taken while the door is located on the moving path in the take-out / pull-in direction and the door is located on the moving path in the opening / closing direction. The switching means is provided for switching the position of the lock member so as to take the locked position during the operation.

[Action]

According to the above means, the lock member is switched to the unlocked position by the operation of the switching means while the door is being guided in the take-out / retracting direction while being guided by the guide mechanism as the piston rod of the loading / unloading cylinder is projected and retracted. The piston rod of the in / out cylinder can move freely.On the other hand, the door once taken out is opened / closed along the side wall of the vehicle while being guided by the guide mechanism as the piston rod of the open / close cylinder projects and retracts. While moving, the lock member is switched to the lock position by the operation of the switching means, and the piston rod of the loading / unloading cylinder is reliably locked in the lifting position. Therefore,
While the door is on the moving path in the opening / closing direction, the door moves in the opening / closing direction while being securely held in the carry-out position by the in / out cylinder. Even if an external force is applied, a required gap is always secured between the door and the vehicle side wall, and the situation where the door and the vehicle side wall come into contact with each other does not occur. Further, when the door is manually opened and closed, the fluid pressure in the take-out direction from the fluid supply / discharge circuit for driving the cylinder does not act on the piston rod of the cylinder, and the door becomes extremely unstable. Even in this case, since the piston rod of the loading / unloading cylinder is locked in the carry-out position while the door is located in the movement path in the opening / closing direction, the door does not come into contact with the vehicle side wall and the door does not move. It can be opened and closed smoothly.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 19.

FIG. 1 shows a main structure of a plug door device according to the present invention. However, the entire structure of the device itself is substantially the same as the conventional example shown in FIG. Are omitted and common constituent elements are given the same reference numerals, and description thereof will be omitted. It should be noted that although the shape and layout of each component is slightly different from the conventional example shown in FIG. 20, it is noted that the function of each component is the same, and in the following description, FIG. The points different from the conventional example shown in will be described.

As shown in FIG. 1, the plug door device according to the present invention has a lock member 50 that takes a locked position that locks the piston rod 14a of the loading / unloading cylinder 14 and an unlocked position that locks the piston rod 14a, and the door 3 Should be in the unlocked position while it is on the moving path in the take-out / drawing direction (ab direction), and should be in the locked position while the door 3 is on the moving path in the opening / closing direction (cd direction). Further, it has a switching means 51 for switching the position of the lock member 50. The switching means 51 includes a detection lever 53 that swings with the movement of the control plate 52 in the vicinity of the door 3 moving from the movement path in the take-out / drawing direction to the movement path in the opening / closing direction, and the detection lever 53. And a transmission mechanism 54 for converting the swinging motion into the projecting / retracting motion of the lock member 50. The control plate
52 is fixed to the lower surface of the guided member 8 (lower door front side member 8a) (see FIG. 2), and its plan view shape is a pentagonal shape having an inclined surface 52a parallel to the take-out / pull-in direction. ing.

3 to 16 show specific configurations of the detection lever 53, the transmission mechanism 54, and the lock member 50.

That is, a valve built-in block that contains the limit valve 31
The detection lever 53 is arranged on the lower surface side of 55, and the base end of the detection lever 53 is fixed to a support shaft 56 rotatably held at one end of the valve built-in block 55. (See FIG. 6) In addition, a guide roller 57 that comes into contact with and separates from the control plate 52 is attached to the tip of the detection lever 53. Reference numeral 70 is a fan-shaped cam forming body for switching the limit valve 31 (see FIG. 7).

Further, the transmission mechanism 54 is disposed on the upper surface side of the valve built-in block 55 and fixed to the support shaft 56 so that the detection lever 53 is provided.
An auxiliary lever 58 that swings integrally with the auxiliary lever 58 (see FIGS. 3, 6, and 8), 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.
It has a cam lever 60 rotatably connected to the other end of 59, and a tension coil spring 62 whose one end is locked to the tip of the auxiliary lever 58 and the other end is locked to a pin 61 (first
(See Figures 3 and 4). The cam lever 60 is slidably held in the longitudinal direction of the storage block 64 accommodating the lock member 50 (see FIGS. 13 and 15). Is the fulcrum pin 65a
A crank lever 65 that can be swung is held via the cam lever 60, and a first roller 66 attached to the crank lever 65 is in contact with a cam surface 60a formed on the cam lever 60.

Further, the lock member 50 (see FIGS. 14 and 16) is retained inside the storage block 64 so as to be capable of projecting and retracting in a direction intersecting with the crank lever 65, and the compression coil spring 68.
The lock member 50 is urged in the protruding direction by a concave groove 50a which is engaged with the second roller 67 attached to the crank lever 65.

The valve built-in block 55, the pin forming plate 68 on which the pin 61 is projected, and the storage block 64 are fixed to the mounting base 1x of the vehicle upper wall shown in FIG. Therefore, in FIG. 1, the portions marked with parallel slant lines schematically show the directly or indirectly fixed portions to the mounting base 1x, and the right side of the inlet / outlet cylinder 14 in FIG. A solenoid valve 26, which will be described later, and a silencer 69 connected to the atmosphere opening portion Ex of the solenoid valve 26 are provided.

According to the above configuration, when the door 3 opens from the fully closed state, the piston rod 14 of the loading / unloading cylinder 14 shown in FIG.
When a is projected, the guide rail 5a and the guided member 8 are integrally moved in the carry-out direction (direction a) while being guided by the first guide mechanism 4, but during this movement, the guided member 8 is moved. Fixed ramp 52 of control plate 52
Since the state in which the guide roller 57 of the detection lever 53 is in contact with a is maintained, the detection lever 53 is held at the swinging end in the leftward direction indicated by the symbol X in the figure. Therefore, the auxiliary lever 58, which is integrated with the detection lever 53, is connected via the connecting rod 59, and the cam lever 60 maintains the state in which it is held at the moving end to the left as shown in FIG. The lock member 50 is held at the retracted end position as shown in FIG. 14 against the urging force of the compression coil spring 68 by the engagement of the concave groove 50a and the second roller 67, and the tip thereof is the storage block.
It will be stored in 64. Thus, when the door 3 is moved in the carry-out direction, the piston rod 14a of the loading / unloading cylinder 14 and the wide head 14ax at the tip of the piston rod 14a can freely project and move without interfering with the tip of the lock member 50. Become.

Next, when the piston rod 14a of the loading / unloading cylinder 14 reaches the moving end in the carry-out direction, the control plate 52 reaches the position shown by the chain line in FIG. 1, and the detection lever 53 (guide roller 57) moves slightly. And swings to the right to reach the position indicated by symbol Y in the figure. Along with this, the cam lever 60 moves slightly to the right due to the urging force of the tension coil spring 62, and the cam surface moves.
At the same time when the contact position of the first roller 66 with respect to 60a changes, the crank lever 65 swings slightly clockwise from the position shown in FIG. 13, and the locking member 50 slightly projects from the state shown in FIG. Then, the tip end of the housing block 64 projects outward by a very short predetermined dimension (this state is not shown). Then, when the guided member 8 and the control plate 52 move in the opening direction (direction c) from the state shown by the chain line in FIG. 1, the detection lever 53 (guide roller 57) further swings to the right and the same. The position indicated by the symbol Z in the figure is reached. Along with this, the cam lever 60 is further moved to the right by the urging force of the tension coil spring 62, and the contact position of the first roller 66 with respect to the cam surface 60a is changed from before so that the crank lever 65 is moved.
Is further swung in the clockwise direction, and the lock member 50 is in a state of protruding by a required dimension from the storage block 64, as shown in FIG. This state is the lock member 50 in this embodiment.
However, the shape of the cam surface 60a of the cam lever 60 is appropriately changed to detect the detection lever 53 (guide roller).
It is also possible to set the lock member 50 to the locked position when 57) reaches the position indicated by the symbol Y in FIG. When the lock member 50 takes the lock position in this way, even if an external force acts in the pulling direction (b direction) on the door 3 and thus the guide rail 5a, the in-and-out cylinder 14
The wide head 14ax at the end of the piston rod 14a of the lock member 5
The piston rod 14a of the loading / unloading cylinder 14 is locked in the carry-out position by being locked at the tip of 0 and prevented from moving in the pull-in direction.

Further, when the door 3 is closed from the fully open state, the operation opposite to the above is performed, and while the door 3 and the guided member 8 are brought out, while the door 3 is moving in the closing direction (d direction). While the piston rod 14a of the loading / unloading cylinder 14 is locked by the lock member 50 at the carry-out position and the door 3 and the guided member 8 are moving in the pulling direction (direction b), the piston rod 14a of the loading / unloading cylinder 14 is not locked. It is locked.

As described above, it is preferable to use a mechanical means that does not depend on an electric signal or fluid pressure as the switching means 51, because the door carry-out position can be reliably maintained even during a power failure or manual opening / closing, for example. .

As described above, the switching means 51 using mechanical means is used as the embodiment of the present invention, but the invention is not limited to this embodiment, and it is possible to use the switching means having the following configuration. Is.

That is, a limit switch is installed to detect a transition point between the moving path in which the door 3 is brought out and drawn in and the moving path in the opening / closing direction, and an electromagnet (solenoid) whose energization is controlled based on an electric signal sent from the limit switch. Etc.), and the above-mentioned locking member 50 is projected and retracted by this electromagnet, as an example.

Further, as the configuration of the control device of the present invention, it is possible to use, for example, the configuration shown in FIGS. 18 to 20 described above, but it goes without saying that the configuration is not limited to this.

〔The invention's effect〕

As described above, according to the plug door device of the present invention, by the operation of the switching means, the locking member unlocks the piston rod of the loading / unloading cylinder while the door is located in the moving path in the take-out / pulling-in direction, and Since the lock member locks the piston rod of the inlet / outlet cylinder while the door is located in the movement path in the opening / closing direction, some external force in the retracting direction is applied to the door when the door moves in the opening / closing direction. Even if it works, it is possible to reliably and firmly prevent the movement of the piston rod in the retracting direction of the piston cylinder, and thus the door in the retracting direction, and to prevent contact between the door and the vehicle side wall. Furthermore,
According to the present invention, not only when the door is automatically opened and closed according to the supply and discharge operation of the pressure fluid, but also when the door is manually opened and closed, the door can be smoothly moved in the opening and closing direction in a stable state without rattling. In addition to being possible, there is an advantage that the contact between the door and the side wall of the vehicle is reliably and firmly prevented and a smooth and quick door opening / closing operation can be performed.

[Brief description of drawings]

1 to 16 show an embodiment of the present invention.
FIG. 1 is a schematic plan view showing a main structure of a plug door device according to the present invention, FIG. 2 is a vertical sectional side view taken along line II-II in FIG. 1, and FIG. 3 is a front view showing a structure of a switching means. Fig. 4 is a bottom view taken along the line IV-IV in Fig. 3, and Fig. 5 is Fig. 4V.
Fig. 6 is a side view taken along line -V, Fig. 6 is a partially cutaway front view showing the configuration of the valve built-in block and its peripheral portion, and Fig. 7 is a side view showing the configuration of the valve built-in block and its peripheral portion. FIG. 9 is a plan view showing the configuration of the valve built-in block and its peripheral portion, FIG. 9 is a bottom view showing the configuration of the valve built-in block and its peripheral portion, and FIG. 10 is a front view showing the configuration of the storage block and the peripheral portion. FIG. 11 is a plan view showing the structure of the storage block and the peripheral portion, FIG. 12 is a side view taken along the line VIII-VIII of FIG. 11, FIG. 13 is a plan view showing the internal structure of the storage block, and FIG. 13 is a vertical sectional view taken along the line IX-IX in FIG. 13, FIG. 15 is a plan view showing the internal structure of the storage block, and FIG. 16 is a vertical sectional view taken along the line XX in FIG. Further, FIG. 17 is a schematic plan view showing a structure of a conventional plug door device, and FIGS. 18, 19 and 20 are schematic configuration diagrams showing a control device of the conventional plug door device, respectively. 1 ... Vehicle (vehicle side wall) 2 ... Opening portion 3 ... Door 4 ... Guide mechanism (first guide mechanism) 5 ... Guide mechanism (second guide mechanism) 9 ... Open / close cylinder 14 ... Entry / exit cylinder 14a ...... Piston rod of the cylinder in and out 50 ...... Lock member 51 ...... Switching means

Claims (1)

[Claims] 1. A loading / unloading cylinder for moving a door in a take-out / drawing-in direction with respect to an opening of a vehicle; an opening / closing cylinder for moving a door taken out from the opening in an opening / closing direction along a vehicle side wall; A plug door device comprising a guide mechanism for guiding the respective movements of the door associated with the operation of the opening / closing cylinder, wherein a locking position for locking the piston rod of the loading / unloading cylinder and an unlocking position for unlocking the piston rod are provided. A lock member is provided, and while the door is located on the moving path in the take-out / pulling-in direction, the unlocked position is taken and the lock position is taken while the door is located on the moving path in the opening / closing direction. A plug door device comprising switching means for switching the position of a lock member.