JPH0741619Y2 - Locking device for plug door - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a lock device for a plug door, and particularly when the vehicle is running, even if a pressure difference between the inside and outside of the vehicle or a deliberate external force acts, the door can be kept in a fully closed position. Technology for holding in.

[Conventional technology]

Generally, the door is moved in the take-out / drawing direction with respect to the vehicle side wall (opening of the vehicle side wall) and the opening / closing direction along the vehicle side wall by the operation of the opening / closing device provided at the upper part of the door and the guide device provided at the lower part of the door. The plug door configured to do so is publicly known.

As a concrete example of this kind of plug door, for example, the actual open door Sho 53-5
As disclosed in Japanese Patent No. 7412, a link mechanism 103 having a coupling link 102 having one end connected to a vehicle 100 and the other end connected to a first guide rail (support frame) 101 as shown in FIG. Then, as shown in FIG. 7, the door 105 is attached to the second guide rail 10
And a slide mechanism 106 that holds the second guide rail 104 slidably on the first guide rail 101. Then, as shown in FIG. 8, a guide metal 108 having an elongated hole 107 is fixedly provided inside the door-side end of the door 105, and a pin slidably fitted into the elongated hole 107. 109 is attached to the tip of a piston rod 110a of an opening / closing cylinder 110 (described later).

Therefore, when the door is closed, the piston rod 110a moves to the eighth position.
By moving backward to the right in the figure, the door 105 also moves to the right,
After that, the coupling link 102 of the link mechanism 103 is rotated from the state shown by the solid line in FIG. 6 to the state shown by the chain line, and along with this, the guide rails 101 and 104 and the door 105 are pulled in the direction (the sixth line). The door 105 is in the fully closed state when the door 105 moves parallel to the direction (a in the figure) and reaches the moving end. On the other hand, when the door is opened, the piston rod 110a moves to the left in FIG. 8 to exert a pressing force to the left on the door 105, and this pressing force causes the connecting link 102 to be shown by a chain line in FIG. The guide rails 101, 104 and the door 105 are rotated in the direction shown in FIG.
Direction), and when it reaches the moving end, the door 105
Is brought to a predetermined position outside the vehicle 100.
When the piston rod 110a further protrudes leftward from such a state, the door 105 moves leftward along the second guide rail 104, and the second guide rail 104 moves to the first guide rail 101. The door 105 is moved to the left along it, and when it reaches the moving end, the door 105 is fully opened.

[Problems to be solved by the device]

By the way, in the plug door disclosed in the above publication, as shown in FIG. 9, an opening / closing device including an opening / closing cylinder 110 is provided at the upper part of the door. Specifically, the opening / closing cylinder 110 main body is a member on the vehicle side (vehicle side wall). 100x) is fixedly installed above one side of the opening X of the piston rod 110a.
The tip of the is connected to the upper part of the door 105 as described above. On the other hand, the lower part of the door 105 is in a state of being connected to a member on the vehicle side through the guide device including the slide mechanism 106 and the link mechanism 103 described above.

However, when the door 105 is connected to the member on the vehicle side as described above, the door is in the fully closed position when the vehicle is running.
It causes the problem that the lower part of 105 is taken out of the car. That is, the upper part of the door (door end side) is connected to the opening / closing cylinder 110 (piston rod 110a) that is fixed to the member on the vehicle side, so that a force to the outside of the vehicle acts on the door 105. Even though the upper part of the door is held in a fully closed state, the lower part of the door is in a state of being connected to the member on the vehicle side through the link mechanism 103 having no self-fixing holding force, so that the door 105 is When a force is applied to the outside of the vehicle, the connecting link 102 of the link mechanism 103 is easily rotated in the direction shown in FIG. 6b, so that the lower portion of the door 105 is taken out to the outside of the vehicle. Such a defect is mainly due to the phenomenon that the air pressure outside the vehicle becomes lower than the air pressure inside the vehicle when the vehicle passes through the tunnel while the vehicle is running, and the intentional external force acting on the door 105 acts on the door 105. And the like.

The present invention has been made in view of the above circumstances, and even when the lower portion of the door is connected to a vehicle-side member through a link mechanism that does not have a self-fixing holding force, the lower portion of the door is required when necessary. It is a technical issue to securely prevent the door from moving outside the vehicle when the vehicle passes through a tunnel or due to a deliberate external force when the vehicle is running. It is a thing.

[Means for Solving the Problems]

As a concrete means for achieving the above technical problem, an opening / closing device provided above the door and a guide device provided at the bottom of the door allow the door to be taken out with respect to the vehicle side wall and along the vehicle side wall. A link mechanism in which the guide device includes a link member having one end connected to a vehicle-side member and a support frame connected to the other end of the link member. And a slide mechanism provided between the support frame and the door, the pair of auxiliary members extending in the opening / closing direction of the door fixed to the upper surface of the box body fixed to the lower side wall of the vehicle. A rail, a locking member held between the two auxiliary rails, slidable only in the opening / closing direction of the door by a driving device, and having a trapezoidal convex portion with a narrow tip; A locked member having a trapezoidal recess whose front end is fixed to the vehicle and is engageable with the locking member, and the locking member is moved to the forward position when the vehicle speed of the vehicle is equal to or higher than a predetermined value. And a control means for controlling the drive device so that the drive device is moved to engage with the locked member.

According to the above means, when the door is opened while the vehicle is stopped, the door is moved in the take-out direction and then moved to the open side in the opening / closing direction by driving the opening / closing device on the upper part of the door, and at the same time, the lower part of the door is operated by the link mechanism. After being guided in the take-out direction, the slide mechanism operates to guide the door to the open side in the opening / closing direction. On the other hand, when the door is closed, the opening / closing device drives the door in the opposite direction to the above to move the door. At the same time, the slide mechanism and the link mechanism perform the opposite operations to guide and move the lower part of the door.

Then, when the door is closed, the locking member and the locked member of the locking device are brought into the engaged state, so that the link mechanism, and hence the lower portion of the door, is prevented from being taken out to the outside of the vehicle.

According to a more detailed configuration, when the vehicle travels after the door is fully closed and the vehicle speed becomes equal to or higher than a predetermined value (for example, 5 km / h), the control means activates the drive device. The locking member is moved to the forward position, thereby engaging the locking member with the locked member. In this case, the locking member is prevented from moving to the outside of the vehicle by the auxiliary rail, and the locked member is fixed to the support frame of the link mechanism.
Even if a force to the outside of the vehicle acts on the lower part of the door and thus on the link mechanism, this force will be received by the auxiliary rail fixed to the box body via the locked member and the locking member. The carry-out movement of the lower portion of the door to the outside of the vehicle is reliably prevented when the vehicle is traveling at a speed equal to or higher than a predetermined vehicle speed. Then, when the vehicle speed of the vehicle becomes equal to or lower than the predetermined value, the control means actuates the drive device in the opposite manner to move the locking member to the retracted position, thereby locking the locking member. If it is removed from the member, it will not hinder the opening and closing movement of the door.

Further, since the locking member is formed so that the tip end thereof is a narrow trapezoidal convex portion, while the tip end of the locked member is also formed so as to be a narrow trapezoidal concave portion. The pulling force of both members is generated by the engagement of the stop member and the locked member, whereby the lower portion of the door is reliably held in the closed position.

The period during which the control means engages the locking member and the locked member as described above is a period when the vehicle speed is equal to or higher than a predetermined value (for example, 0 km / h may be used), that is, a period during the entire traveling of the vehicle. However, it does not matter even if it is all periods except when the door is opened and closed.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 5.

First, prior to the description of the lock device for the plug door according to the present invention, the schematic structure of the opening / closing device provided at the top of the plug door will be described.

That is, as shown in FIG. 5, this plug door opening / closing device is provided above the opening 2 of the vehicle side wall 1 and guides the movement of the door 3 in the take-out / drawing-in direction (a-b direction in the same figure). 1 guide mechanism 4,4, and 2nd guide mechanism 5,5 which is suspended by the 1st guide mechanism 4,4 and which guides the movement of the door 3 in the opening / closing direction (direction cd in the figure). . The first guide mechanism 4 is fixed to a mounting base (not shown) of the vehicle upper wall portion and is arranged at an inclination angle of 45 degrees with respect to the vehicle side wall 1.
4a and a slide body slidably held by the guide body 4a
The second guide mechanism 5 includes a guide rail 5a extending in a horizontal direction in parallel with the door 3 and a pair of sliding pieces 5 slidably held along the guide rail 5a.
It consists of b and 5b. The guide rails 5a of the second guide mechanism 5 are attached to the sliding bodies 4b, 4b of the first guide mechanism 4, 4 via brackets 6, 6, and
A door bracket 7 fixed to the upper part of the door end side end of the door 3 is attached to the sliding pieces 5b, 5b of the second guide mechanism 5 via a connecting metal fitting 8. Further, an opening / closing cylinder 9 extending in the 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. An auxiliary guide roller 12 is supported by the tip fitting 11 attached to the tip of the piston rod 9a of the opening / closing cylinder 9, and the auxiliary guide roller 12 is at one end (right end) of the connecting fitting 8. It is sandwiched by an auxiliary guide rail 13 attached to the front and back so as to be movable back and forth. 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 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 figure, the shaded portions indicate the portions where the vehicle upper wall is fixed to the mounting base.

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 and 4 and taken out in the direction of FIG. 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 is in the state shown by reference numeral (a) in the figure and the second guide mechanism 5 is the same. The state shown by the symbol (b) in the figure is obtained. Since the guide rail 5a and the connecting fitting 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 has moved in the take-out direction by a predetermined dimension, 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 connection are formed. The metal fitting 8 moves in the opening direction along the guide rails 5a, and accordingly, the door 3 also moves in the opening direction (direction c in the figure). At this time,
The limit plate 32 is the roller plunger 31 of the limit valve 31.
When the roller plunger 31a is moved by the spring force by being separated from the a, the passage state of the cylinder pneumatic circuit (not shown) is changed, and the piston rod 14a of the inlet / outlet cylinder 14 is stopped and the open / close cylinder is opened. At the time when only the piston rod 9a of 9 has moved to the projecting end and has reached 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 the same. The state is shown by the reference numeral (b ') in the figure. When the door 3 is closed, the reverse operation is performed.

Next, the guide device for the plug door will be described.

That is, the plug door guide device provided under the door is
As shown in FIGS. 1 to 4, one end of the box 40 is rotatably connected to the upper surface of a box 40 fixed to the vehicle lower wall 1a via support shafts 41a and 41b and arranged in parallel with each other. And a pair of link members 42a, 42b and a support frame 4 rotatably connected to the other ends of the pair of link members 42a, 42b via support shafts 43a, 43b.
4 has a link mechanism 45. A rail forming plate 46 having an L-shaped cross section extending in the opening / closing direction (direction c-d in FIG. 1) is fixed to the support frame 44.
The first guide rail portion 46 extends linearly in the opening / closing direction.
47 is formed, and the box 40 is formed with a second guide rail portion 48 whose end portion on the door closing side is a bent portion 48a extending in the take-out direction (the ab direction in FIG. 1). Has been done. A staircase-shaped bracket 49 is fixedly attached to the end of the door 3 on the door-end side. A first engagement body 51 that engages (abuts) the first guide rail portion 47 is attached to a high step portion of the bracket 49, and a first engagement body 51 that engages the second guide rail portion 48 is attached to a low step portion. Two engaging bodies 52 are attached. Further, a stopper member 53 having a U-shape in a plan view is fixedly provided at an end portion of the rail forming plate 46 (first guide rail portion 47) fixed to the support frame 44 on the door closing side. A regulation surface 53a that regulates movement of the support frame 44 in the take-out direction (direction a in FIG. 1) when the door is fully closed is formed on the. Further, this plug door guide device includes a slide block 54 fixed to the door opening side end of the support frame 44 (rail forming plate 46), and a linear rail body 55 fixed to the door 3 and extending in the opening / closing direction. And a slide block on the linear rail body 55.
54 is slidably engaged only in the opening / closing direction. Therefore, the slide block 54 has a linear rail body 55.
On the other hand, it is configured such that it cannot move in the left-right direction relative to FIG.

However, as a feature of the present invention, the guide device for the plug door is provided with the lock device 60 that prevents the link mechanism 45 from being carried out to the outside of the vehicle at a predetermined time.

The lock device 60 includes a pair of auxiliary rails 6 fixed in the vehicle lower wall 1a and fixed to the upper surface of the box body 40 and extending in the opening / closing direction.
1, 61, a locking member 62 held between the auxiliary rails 61, 61 and slidable only in the opening / closing direction, and fixedly installed on the upper surface of the box body 40 so that the tip of the piston rod 63a is locked by the locking member. Fluid cylinder (drive device) 63 connected to member 62
A locked member 64 fixed to the support frame 44 of the link mechanism 45, and control means for variably controlling the supply / discharge path of the working fluid supplied to the fluid cylinder 63 according to the vehicle speed of the vehicle. It is configured. A trapezoidal convex portion 62a having a narrow tip (left end in FIG. 2) is formed on the upper surface of the locking member 62, and the lower surface of the locked member 64 is similarly formed. A trapezoidal concave portion 64a having a narrow tip is formed, and both of them are detachable. Further, the control means switches the passage state of the fluid supply / discharge circuit for supplying / discharging the working fluid to / from the fluid cylinder 63 between a passage state in which the piston rod 63a projects and a passage state in which the piston rod 63a moves backward. It has a valve (for example, a vehicle speed detection valve that operates depending on whether the vehicle speed is a predetermined value or more),
The switching valve is switched according to the vehicle speed of the vehicle.

According to such a configuration of the lock device 60, the vehicle speed is a predetermined value (for example, 5 km / h) during traveling when the door 3 is in the fully closed state.
In the above case, the control means causes the piston rod 63a of the fluid cylinder 63 to project to move the locking member 62 to the forward position, and therefore the trapezoidal convex portion 62a of the locking member 62 is the first, As shown in FIG. 3, it is in a state of being engaged with the trapezoidal recess 64a of the locked member 64. The locking member 62 is prevented from moving to the outside of the vehicle by the auxiliary rail 61, and the locked member 64 is fixed to the support frame 44 of the link mechanism 45. Even if a force to the outside of the vehicle acts on the support frame 44 of 45, this force is received by the auxiliary rail 61 fixed to the box body 40 via the locked member 64 and the locking member 62, This surely prevents the lower portion of the door 3 from being carried out to the outside of the vehicle when the vehicle is running at a speed equal to or higher than a predetermined vehicle speed, and, for example, the rubber packing 3a.
Even if the lower part of the door is not held in the closed position shown in FIG. 1 due to the elastic force of the door and the mounting error during fitting, the lower part of the door is securely closed by the pulling force of the locked member 64 and the locking member 62. Will be held in.

On the other hand, when the vehicle speed of the vehicle is less than or equal to a predetermined value (for example, 5 km / h) and immediately before the vehicle stops or immediately after the start of traveling, the control means moves the piston rod 63a of the fluid cylinder 63 backward to the retracted position. The stopper member 62 is pulled out from the locked member 64. As a result, the locked member 64 is not restricted in its movement by the locking member 62, and the locked member 64, and thus the support frame 44 of the link mechanism 45, becomes movable.
When the vehicle is stopped and the door 3 is opened in such a state, the door 3 is guided to the outside of the vehicle while being guided by the link mechanism 45, and the state shown in FIGS. .

As for the drive unit, the fluid cylinder 63
However, the locking member 62 is not limited to this and may be any member that can move the locking member 62 between the forward movement position and the retracted position.

Further, in the illustrated example, the locked member 64 is fixed to the support frame 44 of the link mechanism 45. However, separately from this, the locked member 64 is connected to the link member 42a of the link mechanism 45 and / or 42b
However, in this case, the auxiliary rail 61,
It is necessary to appropriately change the arrangement or layout of the locking member 62 and the fluid cylinder 63.

Further, the timing when the control means engages the locking member 62 and the locked member 64 is not limited to the above, and when the vehicle speed of the vehicle is a predetermined value (for example, 0 km / h) or more. That is, it may be in the engaged state throughout the traveling of the vehicle, and may be in the engaged state during all the periods other than the door opening operation and the door closing operation.

When the locking member 62 is removed from the locked member 64 and the locking device 60 is in the unlocked state, the lower portion of the door 3 is guided as follows.

That is, when the door 3 starts the opening operation from the fully closed position shown in FIGS. 1 and 3 by the operation of the opening / closing device (the entrance cylinder 14 and the opening / closing cylinder 9) on the upper part of the door, the bracket on the lower part of the door. The second engaging body 52 attached to 49 moves in the take-out direction along the bent portion 48a of the second guide rail portion 48, and the first engaging body 51 also attached to the bracket 49 at the lower part of the door also moves in the take-out direction. Move, but at this time,
The first engaging body 51 is the first guide rail portion 47 of the rail forming plate 46.
Since it moves in the state of being in contact with the rail forming plate 46, the support frame 44 to which the rail forming plate 46 is fixed is a pair of link members.
While rotating 42a and 42b, they move in parallel in the carry-out direction. Then, at the time when the movement of the door 3 in the take-out direction is completed, that is, when the movement of the second engagement body 52 along the bent portion 48a is completed, the door 3 becomes the state shown by the symbol (a) in FIG. At this time point, the first engaging body 51 is slightly moving relative to the first guide rail portion 47 in the door opening direction,
Moreover, the link members 41a, 42b are orthogonal to the vehicle side wall 1.

When the door 3 moves in the opening direction from such a state,
The second engagement body 52 moves along the linear portion of the second guide rail portion 48, at the same time the first engagement body 51 also moves along the first guide rail portion 47, and the linear rail body 55 of the door 3 is It is guided and moved by the slide block 54 of the support frame 44 (rail forming plate 46). When the moving end in the opening direction is reached, the door 3 is in the state indicated by reference numeral (a ') in FIG. 2, that is, the fully opened state.

On the other hand, when the door 3 is closed from such a fully opened state, the reverse operation is performed, but when the door 3 is moved in the retracting direction during this closing operation, that is, as shown in FIG. When the state shown by reference numeral (a) is changed to the state shown in FIG. 1, the restriction surface 53a of the stopper member 53 and the first
When the first engaging body 51 is fitted between the guide rail portion 47 and the fully closed state, the first engaging body 51 and the restriction surface 53a are in close contact with each other.

[Effect of device]

As described above, according to the present invention, the locked member and the locked member, which are components of the lock device, are engaged with each other during a predetermined period when the door opening / closing operation is not performed, so that the locked device is locked. The link mechanism with the member attached is firmly locked to the member on the vehicle side with the locking member attached, which causes a pressure difference between the inside and outside of the vehicle when the vehicle passes through a tunnel or is intentionally caused. Even if a force is exerted to the outside of the vehicle on the lower part of the door and thus to the link mechanism, this force will be reliably received by the auxiliary rail on the vehicle side, and the lower part of the door in the fully closed position when the vehicle is running will Problems such as being taken outside the vehicle will be reliably avoided.

Further, since the engaging member and the engaged member both have a trapezoidal convex portion and a concave portion each having a narrow tip end, a pulling force is generated in the engaged state, so that the elasticity of the rubber packing and the fitting Even if the lower part of the door is not accurately held in the closed position due to a mounting error, the lower part of the door is reliably held in the closed position.

[Brief description of drawings]

1 to 5 show an embodiment of the present invention.
FIG. 1 is a plan view showing a plug door locking device when the door is fully closed, FIG. 2 is a plan view showing a plug door locking device when the door is open, and FIG. 3 is an enlarged side view of the locking device corresponding to FIG. FIG. 4 is an enlarged side view of the lock device corresponding to FIG. 2, and FIG. 5 is a plan view showing the structure of an opening / closing device for driving the plug door. Further, FIG. 6 is a schematic plan view showing a conventional link mechanism, FIG. 7 is a vertical sectional side view showing a conventional slide mechanism, and FIG. 8 is a schematic view showing a main part configuration of a conventional plug door opening / closing device. Top view, No. 9
FIG. 1 is a schematic front view showing a peripheral structure of a conventional door. 1 …… Vehicle side member (vehicle side wall) 1a …… Vehicle side member (vehicle lower wall) 3 …… Door 43a, 43b …… Link member 44 …… Support frame 45 …… Link mechanism 56 …… Slide mechanism 60 ...... Lock device 62 …… Locking member 63 …… Drive device (fluid cylinder) 64 …… Locked member

Claims (1)

[Scope of utility model registration request] 1. An opening / closing device provided above the door and a guide device provided below the door are configured to move the door in a take-out / drawing direction with respect to a vehicle side wall and an opening / closing direction along the vehicle side wall. The guide device is provided between the support frame and the door; and a link mechanism having a link member having one end connected to a vehicle-side member and a support frame connected to the other end of the link member. A pair of auxiliary rails extending in the opening / closing direction of the door fixed to the upper surface of the box body fixed to the lower side wall of the vehicle, and held between the auxiliary rails. And a locking member that is slidable only in the opening and closing direction of the door by the driving device and has a trapezoidal convex portion with a narrow tip, and is fixed to the link mechanism and can be engaged with the locking member. Ahead To be a trapezoidal recess having a narrow width, and to move the locking member to the forward position to engage the locked member when the vehicle speed of the vehicle is equal to or higher than a predetermined value. 2. A locking device for a plug door, comprising: control means for controlling the drive device.