JP2002264804A - Door presser device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure airtightness inside of a vehicle, while to reduce the weight of the vehicle and to reduce the labor of construction work and maintenance work. SOLUTION: This door presser device for a vehicle secures the airtightness inside of the vehicle by pushing a door 10 for the vehicle to a seal member 11 with door presser member 41 and 42 provided near the door 10. The device is provided with an electric driving part 40 having an electric motor 46 as a driving source, a drive converting mechanism 44 for converting the output of the electric driving part 40 to door pressing operations of the door presser members 41 and 42, and a return spring mechanism 54. When the motor is electrified, each door presser 41 and 42 pushes the door 10 to the seal member 11 with the driving force. When the motor is not electrified, the pushing force is released by the energizing force of the return spring mechanism 54.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular door holding device for hermetically sealing a railroad vehicle or the like.

[0002]

2. Description of the Related Art Generally, in a traveling vehicle (particularly, a railway vehicle), it is preferable to sufficiently seal the inside of the vehicle. By such airtightness, for example, when the vehicle enters a tunnel at a high speed, it is possible to prevent a sudden change in the vehicle internal pressure,
It is also possible to improve the efficiency of air conditioning in the vehicle.

Conventionally, as a means for performing airtightness in a vehicle, a seal member surrounding the entrance is provided, for example, on the outside of a door that opens and closes the entrance, and the door is opposite to the seal member (for example, Development of a door holding device that presses from the inside) is underway. For example, Tokiko Sho 6
In Japanese Patent Application Laid-Open No. 3-58465, a door holding cylinder is arranged near the inner surface of a vehicle door, while air pressure output from an air source is converted into a hydraulic pressure, and the door holding cylinder is operated by the hydraulic pressure. A device is disclosed in which the door is pressed against a sealing member by a piston of a door holding cylinder.

[0004]

As described in the above-mentioned publication, when a door is held by utilizing pneumatic oil conversion, an air pressure pump, an air cylinder and an air cylinder for air / oil conversion, and an electromagnetic switch which are driving sources thereof are used. A large-scale hydraulic circuit system including various control valves such as valves and check valves, a muffler, a purification filter, and a pipe to each door holding cylinder must be mounted on the vehicle. Therefore, the total weight of the vehicle and the number of man-hours are remarkably increased, and particularly, the piping work is very troublesome. In addition, there is also an inconvenience that the maintenance and inspection work must be performed frequently.

The present invention has been made in view of the above circumstances, and has been developed to provide a door holding device capable of reliably performing airtightness in a vehicle while reducing the weight of the vehicle and reducing construction work and maintenance work. For the purpose of providing.

[0006]

The present inventors have conceived of using an electric motor as a drive source in order to solve the above-mentioned problems. By using such an electric motor, installation of a fluid pressure circuit system such as piping is not required, and the frequency of maintenance and inspection work is significantly reduced. However, when such an electric motor is used, it is desired that the switching between the door press and the door press release be reliably performed with as little power as possible.

SUMMARY OF THE INVENTION The present invention has been made in view of the above, and is a vehicle door pressing device for pressing a vehicle door against a seal member by a door pressing member provided near the vehicle door to seal the inside of the vehicle. An electric drive unit having an electric motor as a drive source and a drive output unit operated by the power, and a drive conversion mechanism for converting the movement of the drive output unit of the electric drive unit into a door holding operation of the door holding member. Wherein the door holding member is operated in a direction of pressing the door against the seal member by a driving force when the electric motor is energized, and the door holding member is turned off when the electric motor is not energized. And a return spring mechanism for operating the door holding member in a direction in which the door holding force is released.

According to this configuration, by energizing the electric motor, the door can be pressed by the door pressing member, that is, the door can be pressed against the seal member by the driving force, while the energization of the electric motor is cut off. Thus, the door holding force by the door holding member can be released by utilizing the elastic force of the return spring mechanism. Therefore, the door holding operation can be switched by switching the energization of the electric motor, and when the door is not held, the electric power can be cut off by turning off the energization of the electric motor.

Here, although the type of the electric motor is not limited, if the rotor-side magnet or the stator-side magnet is made of a permanent magnet, the rotor is rotated in the reverse direction (rotated in the direction opposite to the direction in which electricity is supplied). However, a considerably large return spring mechanism is required due to the large reverse rotation torque required, whereas a rotor magnet and a stator magnet both composed of electromagnets (for example, induction motors, series motors, If a winding motor is used, the reverse rotation torque is reduced, and the door retainer can be reliably released even with a small return spring mechanism.

The return spring mechanism may be connected to, for example, a door holding member. However, the return spring mechanism is provided in an electric drive unit, and an urging force is applied to a drive output unit of the electric drive unit by its resilient force. It is more preferable to do so.
By providing the return spring mechanism on the electric drive unit side in this way, the configuration is simplified. In particular, when a plurality of door holding members are connected to the drive output unit via the drive conversion mechanism, it is possible to release the door holding force by each door holding member with a single return spring mechanism. , Is even more effective. Further, the drive output unit is a rotary output shaft that is rotated by the power of the electric motor, and the drive conversion mechanism is connected to one end of the rotary output shaft, and the return spring mechanism is provided at the other end. Thus, the structure of the electric drive unit can be simplified.

The holding state of the door by the door holding member may be performed only by energizing the electric motor. However, the door holding mechanism receives the supply of electric energy, and the door holding member seals the door with the seal. The door holding state can be more reliably held by providing the door holding means that can be switched between a holding state in which the member is pressed against the member and a release state in which the holding is released. Also, by holding the door holding state by the door holding means,
It is also possible to save power by turning off the power to the electric motor during door holding.

As the door holding means, for example, an electromagnetic brake is preferable. The electromagnetic brake may be connected to, for example, each drive conversion mechanism or drive output unit. However, if the electromagnetic brake is directly connected to the output shaft of the electric motor, the structure is further simplified. Further, when a speed reducer is interposed between the motor output shaft and the drive output unit in the electric drive unit, the required braking force can be further reduced by directly braking the motor output shaft before the speed reduction.

Preferably, the door holding means is configured to be in the holding state when the exciting current is not supplied, and to be switched to the released state by supplying the exciting current. According to this configuration, even if the electromagnetic brake is suddenly de-energized due to a power failure or the like, the door holding state can be maintained, and thus the fail-safe function is enhanced.

If it is desired to be able to forcibly switch from the hold state to the release state in the event of an emergency such as a power failure, for example, a mechanical release mechanism by manual operation or a battery for emergency release may be provided. I just need.

Since the switching time of the door holding operation is shifted from the opening / closing time of the door, a drive circuit for operating the electric motor for driving the door holding is provided with a drive source for opening / closing the door. It can also be used as a drive circuit for a door opening / closing electric motor provided as above, thereby simplifying the entire motor drive circuit system.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described with reference to the drawings.

The door 10 shown in FIGS. 1 and 2 is for opening and closing a doorway provided on the side of the vehicle, and a seal member 11 (FIG. 2) surrounding the doorway is located immediately outside the door. Is provided. Specifically, as shown in FIG. 3, a bracket 4 is fixed to the inner peripheral edge of the frame 2 of the entrance and exit, and a seal member 11 made of an elastic material such as rubber is provided on the inner surface (left side in FIG. 3). The seal member 11 is fixed, and the inner peripheral surface of the seal member 11 is protected by the cover 6.

A plurality of brackets 12 projecting upward are fixed to the upper end of the door 10. On the other hand, the opening and closing direction of the door 10 (the left and right direction in FIG. 1) is above the entrance.
, A slide member 14 is held by the rail 16 so as to be slidable along its longitudinal direction, and the upper end of each bracket 12 is fixed to the slide member 14. With this configuration, the door 10 is suspended and supported so as to be able to slide open and close with respect to the vehicle.

In FIG. 1, reference numeral 15 denotes a door closing switch for detecting that the door 10 is fully closed.

At a position further above the rail 16,
An opening / closing drive device 20 for opening and closing the door 10 is provided. The opening / closing drive device 20 includes a door opening / closing drive motor 22 as a drive source, and an output shaft of the drive pulley 2.
3 is fixed, and a driven pulley 24 is rotatably installed at a position separated from the driving pulley 23 in the longitudinal direction of the rail 16, and an endless belt 26 is stretched between the pulleys 23 and 24. . The lower portion of the belt 26 is connected to the sliding member 14 via a connecting member 27.
It is connected to. Therefore, the door opening / closing drive motor 2
As the driving pulley 23 is driven to rotate by the output of No. 2, the belt 26 stretched between the pulleys 23 and 24
Is reciprocated, and the door 10 is slidably opened and closed integrally with the slide member 14 connected to the belt 26.

Further, the opening / closing drive device 20 is supported on a vehicle ceiling side via a hinge member 28 so as to be swingable about a horizontal axis (an axis parallel to the door opening / closing direction). The outer surface of the door 10 (FIG. 3)
(The right side) can be pressed against the seal member 11.

In the present invention, various structures conventionally used for railway vehicles are applicable irrespective of the specific structure of the door support structure and the opening / closing drive means.

Next, a door holding device for pressing the door 10 toward the seal member 11 (ie, outside) will be described.

In this embodiment, a door holding device is provided on each of the left and right sides of the entrance which is opened and closed by the door 10. Each of the door pressing devices includes an electric driving unit 40 provided at a middle position in the vertical direction, door pressing members 41 and 42 disposed above and below the electric driving unit 40, and the door pressing members 41 and 42.
Drive conversion mechanism 4 connecting the electric drive unit 42 and the electric drive unit 40
The output of the electric drive unit 40 is transmitted to the door holding members 41 and 42 via the drive conversion mechanism 44, whereby the door holding members 41 and 42 press the door 10 against the seal member 11. The position (pressing position) and the position (slack position) at which the pressing force is released can be switched.

More specifically, the electric drive unit 40 is shown in FIGS.
As shown in FIG. 7, a door press drive motor 46 serving as a drive source of the door press, a speed reducer 48 for reducing the output thereof and converting the output into a rotational force of a rotary output shaft (drive output section) 50, An electromagnetic brake 52 is directly connected to a drive shaft 47 (FIG. 8) of the drive motor 46, and the speed reducer 48, the door holding drive motor 46, and the electromagnetic brake 52 are connected in a state where they are vertically arranged in that order. I have. Further, the return spring mechanism 54 is arranged on the side thereof along the vertical direction.
The rotation output shaft 50 is urged by a return spring mechanism 54 in a predetermined direction (a direction for switching door holding members 41 and 42 described later to a slack position).

The door holding drive motor 46 serves as a drive source for the door holding, and has a drive shaft 4 extending in the vertical direction.
7 (FIG. 8). This door holding drive motor 46
May be an electric motor, for example, a DC brushless motor can be applied, but more preferably, a permanent magnet is not used, such as an induction motor, a series-wound motor, or a shunt-wound motor. It is preferable that both the magnet and the rotor-side magnet are constituted by electromagnets. By using such a motor, the reverse rotation torque generated in the non-energized state is reduced, and even if the urging force of the return spring mechanism 54 is low, the return operation of the rotary output shaft 50 by the urging force (the door pressing members 41, 42). The operation of returning the to the slack position) is performed reliably.

The rotary output shaft 50 is rotatably supported by the speed reducer 48 while penetrating the speed reducer 48 in a direction parallel to the opening / closing direction of the door 10 (ie, a direction perpendicular to the door holding direction). By the drive transmission from the speed reducer 48, it rotates around its own axis (around the longitudinal axis). Specifically, as shown in FIG.
The door opening / closing direction (FIG. 7)
(In the vertical direction), the sleeve 58 is rotatably held, the rotation output shaft 50 is inserted into the sleeve 58, and the sleeve 58 is integrally rotated with the sleeve 58 by a key 57. Are combined. Then, one end 50 of the rotary output shaft 50
a is provided with a rotating arm (rotating link) 60 at the other end 50.
The return spring mechanisms 54 are connected to the respective members b.

The rotary arm 60 constitutes the drive conversion mechanism 44 together with a connecting rod (connecting link) 90 described later. The rotating arm 60 has a symmetrical shape, and a central portion thereof is coupled to one end 50a of the rotary output shaft 50 so as to rotate integrally therewith.

Further, a stopper 61 is provided at an appropriate position near the rotating arm 60, and a position where the rotating arm 60 comes into contact with the stopper 61 by the operation of the door pressing drive motor 46 (two points in FIG. 4). It is configured to be rotationally driven up to a holding pivot position (shown by a chain line).

The return spring mechanism 54 includes a pinion 62 fixed to the end 50a of the rotary output shaft 50, a return shaft 64 provided along the vertical direction, and a return spring 66 for urging the return shaft 64. It has.

The return shaft 64 penetrates a pair of upper and lower holding portions 63A and 63B formed in the housing of the speed reducer 48 so as to be vertically movable (that is, movable in the axial direction) by the holding portions 63A and 63B. Is held. At upper and lower ends of the return shaft 64, flange portions 64a and 64b are provided, and at an upper inner surface, a rack 64c meshed with the pinion 62 is provided.
Each is formed. Therefore, the rotation output shaft 50
The return shaft 64 moves up and down in conjunction with the rotation of the pinion 62.

The return spring 66 is composed of a compression coil spring in the illustrated example, and is interposed between the lower flange 64b of the return shaft 64 and the lower holding portion 63B. This return spring 66
The return shaft 64 is urged downward by the resilient force, and the upper flange 64a of the return shaft 64 is turned off when the door pressing drive motor 46 is not energized (that is, the rotation output shaft 50 is almost freely rotating). The lower limit position corresponding to the upper holding portion 63A (FIG. 6)
The position of the return shaft 64 is held. The urging force is designed to act on the rotation output shaft 50 in a direction opposite to the direction of the rotation drive by the door holding drive motor 46.

In other words, the rotation output shaft 50 and the rotation arm 60 are rotated by the biasing force of the return spring mechanism 54 (the rotation position corresponding to the lower limit position of the return shaft 64 in the mechanism 54). 4; a position driven by the operation of the door pressing drive motor 46 (a rotating position at which the rotating arm 60 hits the stopper 61; a turning position shown by a two-dot chain line in FIG. 4). (Moving position).

Further, a presser detection switch 67A and a looseness detection switch 67B, which are limit switches, are provided on the outer surface of the speed reducer 48, and the turning arm 60 is turned to the presser turning position to turn the turning arm. When the detector 67a of the presser detection switch 67A comes into contact with the switch 60A, the switch 67A is switched from OFF to ON. Conversely, the rotation arm 60 is rotated to the loosening rotation position, thereby turning the rotation arm 60. The looseness detection switch 67B
Switch 67A, 67B so that the switch 67B is switched from off to on by the contact of the detector 67b of
Is arranged.

The electromagnetic brake 52 directly holds and releases the drive shaft 47 of the door holding drive motor 46.
It has a structure as shown in FIG. That is, the brake 52 includes a main body 68 fixed to the lower end of the housing of the door pressing drive motor 46 and a cover 69 covering the lower surface thereof. The lower part of the drive shaft 47 is rotated by a bearing 70 incorporated in the main body 68. It is kept possible. A fan 74 is fixed to the lower end of the drive shaft 47 via a key 72, and a horizontal donut plate-shaped armature 76 is provided directly above the fan 74 so as to be vertically movable, and a solenoid for driving the armature 76 is provided. A spring 78 for pressing the armature 80 and the armature 76 downward is incorporated in the main body 68. When the exciting current is not supplied to the solenoid 80, the armature 76 is pushed down by the resilience of the spring 78, and the pad 79 provided on the lower surface thereof
The armature 76 is pulled up by magnetic force against the resilience of the spring 78 by supplying an exciting current to the solenoid 80 while pressing the fan 74 and the drive shaft 47 by pressing against the upper surface of the armature 76. It is configured to release the fan 74 and the drive shaft 47.

That is, the electromagnetic brake 52 brakes the drive shaft 47 in the non-energized state, and finally the door holding member 4
The positions of the drive shafts 47 are fixed while the positions of the drive shafts 47 are fixed.
To allow the door holding members 41 and 42 to move.

In FIG. 4 and the like, reference numeral 53 denotes a forcible release lever, which is configured to be able to mechanically release the braking state by the electromagnetic brake 52 by rotating the lever 53 even in a non-energized state. I have.

On the other hand, the door holding members 41 and 42 are arranged at positions where the upper end and the lower end of the door 10 can be pressed, respectively, and have axes parallel to the rotary output shaft 50 (parallel to the door opening and closing direction). It is supported on the vehicle side so as to be swingable about a horizontal axis). Specifically, each door holding member 41,
9 and 10, a support shaft 82 penetrates in a direction parallel to the rotary output shaft 50, and a bearing 86 is interposed between the support shaft 82 and the door holding members 41 and 42. I have. The support shaft 82 itself has a flange portion 84 at one end thereof, and the flange portion 84 is fixed to the vehicle side.

Outer ends (ends closer to the door) 41a, 42a of the inner and outer ends of each door holding member 41, 42
Is formed in a forked shape, and a door holding roller 88 is held at the forked portion so as to be rotatable around a bolt 87 parallel to the support shaft 82. Door holding member 4
Inner ends (ends farther from door) 41b, 4 of 1, 42
2b is similarly formed in a forked shape, and a connecting rod 90 is connected to the forked portion.

The connecting rod 90 is connected to the rotating arm 6.
0, and the inner ends 41b, 42b of the door holding members 41, 42 are connected to form a drive conversion mechanism 44 together with the arm 60. In the illustrated example, a turn capable of adjusting the axial length is provided. It consists of a buckle.

That is, each connecting rod 90 has a long sleeve 92 and ring-shaped connecting portions 93 and 94 formed at both ends thereof, and bolt portions formed at these connecting portions 93 and 94 are formed by bolts. The sleeve 92 is screwed into screw holes formed at both ends of the sleeve 92, and the screwed portion is tightened by a double nut 96. The sleeve 92 and the coupling portions 93 and 94 are connected by relative rotation. The axial length of the entire rod 90 is adjustable.

One connecting portion 93 is connected to the rotating arm 60.
Is inserted into the forked part formed at both ends 60a of the
When the bolt 97 penetrates in a direction orthogonal to the insertion portion, the both ends 60 a of the rotating arm and the coupling portion 93 are connected to each other via the bolt 97 so as to be relatively rotatable. The other connecting portion is inserted into a forked portion formed on the inner end portions 41b and 42b of the door holding members 41 and 42, and the pin 98 penetrates through the inserted portion, so that the pin 98 is interposed. The inner end portions 41b and 42b of the door holding members 41 and 42 and the connecting portion 94 are connected so as to be relatively rotatable.

When the turning arm 60 of the electric drive unit 40 is turned to the slack turning position (the position indicated by the solid line in FIG. 4), each of the turning arms 60 is connected to the turning arm 60 via the connecting rod 90. Inner end 41 of door holding members 41, 42
9 are retracted toward the electric drive unit 40, and conversely, the door holding rollers 88 of the outer ends 41a and 42a are separated from the inner surface of the door 10 (or retracted to the extent that they are not separated) (the slack position; FIG. 9). 10 and 10), the inner ends 41b and 42b are pushed out to the upper and lower sides, respectively, in a state where the rotary arm 60 is rotated to the holding rotary position (the two-dot chain line position in FIG. 4). Outer ends 41a, 42a
The drive conversion mechanism 44 is configured such that the door holding roller 88 presses against the pressed plate 10 a provided on the inner surface of the door 10 to press the door 10 against the outer seal member 11.

Further, in the illustrated configuration, the distance from each support shaft 82 to the tip of the door holding roller 88 at the outer end 41a, 42a of the door holding member 41, 42 is determined by the distance between the support shaft 82 and the door holding member 41, 42. 42 inner end portions 41b, 4
The distance is set smaller than the distance to the bolt 98 in 2b, and care is taken so that a large door holding force can be obtained by the principle of leverage even with a small driving force.

Next, a control system of the apparatus will be described. In this embodiment, a door controller 30 is mounted in the opening / closing drive device 20, and both the door driving and the door holding are controlled by the door controller 30 collectively.

FIG. 11 shows a specific configuration of the door controller 30. The controller 30 includes, in addition to a power supply circuit 31, an input circuit 32, a microcomputer 33, a drive circuit 34 (for driving a motor), a hall signal input circuit 35, a door holding relay switch Ry1, a door opening / closing relay switch Ry2, It includes an electromagnetic brake relay switch Ry3 and the like.

The input circuit 32 is provided with
A / D-converts various signals output from a conductor switch 8 operated by the conductor, a vehicle speed switch 9 which is turned on when the vehicle speed exceeds a certain level, and the like, in addition to 7A, a slack detection switch 67B, and a door closing switch 15. Is input to the microcomputer 33.

The microcomputer 33, based on the input signal, drives the drive circuit 34 and the relay switch Ry.
1 and Ry2 to output a control signal to the door holding drive motor 4
6 and drive control of the door opening / closing drive motor 22 and output a control signal to the electromagnetic brake relay switch Ry3 to perform brake control.

The drive circuit 34 is commonly used as a drive circuit for both motors 46 and 22 in this embodiment. FIG. 11 shows that the door holding drive motor 46 is a three-phase induction motor, the door opening / closing drive motor 22 is a three-phase brushless motor,
An example is shown in which the drive circuit 34 is formed of a three-phase bridge circuit. The U-phase, V-phase, and W-phase of the door holding drive motor 46 are respectively connected to three output terminals of the drive circuit 34 via the relay switch Ry1. The U-phase, V-phase, and W-phase of the door opening / closing drive motor 22 are connected via a relay switch Ry2. Further, a hall signal output from a hall element included in the door opening / closing drive motor 22 is fed back to the microcomputer 33 through a hall signal input circuit 35.

Next, the contents of the motor control performed by the microcomputer 33 and the operation of the door holding device will be described together with the time chart of FIG.

1) Initial state First, in an initial state (a state in which the vehicle is stopped and the door 10 is closed) before the time t1 shown in FIG. 46 and the electromagnetic brake 52 are both in a non-energized state. At this time, the rotation output shaft 50 and the rotation arm 60 are pressed against the urging force of the return spring mechanism 54 and the pressing rotation position shown by the two-dot chain line in FIG. The electromagnetic brake 52 in a non-energized state brakes the drive shaft 47 of the door pressing drive motor 46 so as to maintain the rotation position. Therefore,
Each door holding member 41, 42 connected to the rotating arm 60 via a connecting rod 90 has an outer end 41.
The door holding roller 86 held by the doors 10a and 10a is fixed to a pressing position for pressing the pressed plate 10a of the door 10 from the inside, and the door 10 is pressed against the outer seal member 11 by this pressing, so that the inside of the vehicle is Airtightness is ensured.

At this time, the looseness detection switch 67B is turned off, the presser detection switch 67A is turned on, the door closing detection switch 15 is turned on, and the vehicle speed switch 9 is turned off.

2) Door Opening Operation When the conductor switch 8 is operated in the "door opening" direction from the state of 1) (time t1 in FIG. 12), an exciting current is supplied to the electromagnetic brake 52, and the electromagnetic brake 52 is actuated. Drive shaft 47
Is released. As a result, the rotation output shaft 50 and the pinion 62 of the return spring mechanism 54 connected to the rotation output shaft 50 are also released, and the return shaft 64 of the mechanism 54 is moved to the lower limit position (upper flange portion) by the elastic force of the return spring 66. 64
a is pressed down to the position at which the “a” contacts the upper holding portion 63A). Accordingly, the rotation output shaft 50 and the rotation arm 60 connected to the return shaft 64 via the rack 64c and the pinion 62 rotate to the slack rotation position shown by the solid line in FIG. By the rotation of the rotation arm 60, the inner ends 41 b and 42 b of the door holding members 41 and 42 are connected to the connecting rod 90.
, And the outer ends 41a, 42a of the door holding members 41, 42 pivot upward and downward to release the pressing of the door 10, and the door 10 opens and closes smoothly. You can do it.

At this time, if the door holding drive motor 46 is formed of a motor having no permanent magnet, such as an induction motor, the reversing torque is small, and the elasticity of the return spring 66 is relatively low. Thus, even when the reduction ratio of the speed reducer 48 is large, it is possible to reliably switch the door holding members 41 and 42 to the slack position.

When the loosening operation is completed in this way, the looseness detecting switch 67B is switched from off to on, and the door opening / closing drive motor 22 is energized after the switching (time t2). That is, the opening drive of the door 10 is started.

3) Door closing operation and starting of the vehicle After the conductor checks the safety, the conductor switch 8 is set to "door closed".
(Time t3), the door opening / closing drive motor 22 rotates in the reverse direction to drive the door in the closing direction, and when the door is fully closed, the power supply to the motor 22 is stopped.

Thereafter, when the vehicle speed switch 9 detects that the vehicle has started and the vehicle speed has reached a certain level or more (at time t).
4) The presser drive motor 46 is energized and its drive shaft 47
Rotates. The rotation force is converted into rotation of the rotation output shaft 50 via the speed reducer 48, and the rotation output shaft 50 and the rotation arm 60 are moved to the pressing rotation position where the arm 60 contacts the stopper 61 (the two-dot chain line in FIG. 4). ) To return spring mechanism 54
Pivots against the biasing force of. By the rotation of the rotation arm 60, the inner ends 41b of the door holding members 41, 42,
42b is pushed out to the upper and lower outer sides, and conversely, the outer end 41
a, 42a are pivoted inward and the end portions 41a, 42a
The pressing roller 86 held by the pressing member presses the pressed plate 10a of the door 10 from the inside. As a result of the switching of the door holding members 41 and 42 to the holding position in this manner, the door 10 is pressed against the outer seal member 11 again, and the inside of the vehicle is hermetically sealed.

Further, as the door holding members 41 and 42 are switched to the holding position, the holding detection switch 67 is switched.
A is turned on, and upon receiving this signal, the presser drive motor 46 and the electromagnetic brake 52 are turned off. When the door holding drive motor 46 is de-energized, the drive shaft 47
However, since the drive shaft 47 is braked by the electromagnetic brake 52 which has also been switched to the non-energized state, the rotary output shaft 50 and the rotary arm 60 are still held at the pressing and rotating position, and The members 41 and 42 are kept at the holding position.

That is, in this device, the electric drive unit 40
It is possible to maintain the door holding state while stopping the power supply to the door holding drive motor 46 and the electromagnetic brake 52, thereby contributing to significant power saving.

The embodiments of the present invention are not limited to those described above, and the following embodiments can be taken as examples.

The return spring mechanism 54 may be connected to, for example, each door holding member 41, 42. However, as shown in FIG.
The configuration can be further simplified by providing. In particular,
As shown in the drawing, if the rotation arm 60 is connected to one end 50a of the rotation output shaft 50 and the return spring mechanism 54 is connected to the other end, respectively, the electric drive unit 40 includes a drive conversion mechanism and a return spring mechanism. Both can be integrated compactly.

In the illustrated device, the electromagnetic brake 52
Can be omitted, and the door holding state can be maintained only by energizing the door holding drive motor 46. Further, even when door holding means is provided separately from the door holding drive motor 46,
The specific means is not limited to the electromagnetic brake 52. For example, a solenoid device having a plunger that can be retracted is disposed near the motor drive shaft 47, and the plunger is moved to the motor drive shaft 47 or to the motor drive shaft 47 by the operation of the solenoid device. The fixed member may be switched between a locked state and a released state. Also in this case, the configuration in which the motor drive shaft 47 is locked with the solenoid device de-energized allows the door holding state to be maintained even during a power failure or the like, and also contributes to power saving. .

[0063]

As described above, the present invention relates to a vehicular door holding device for pressing a vehicle door against a seal member by a door holding member provided near the vehicle door to make the inside of the vehicle airtight. An electric drive unit having an electric motor and a drive output unit operated by the power of the electric motor, and a drive conversion mechanism that converts the movement of the drive output unit of the electric drive unit into a door holding operation of the door holding member, When the electric motor is energized, the driving force of the door pressing member operates in a direction to press the door against the seal member, and when the electric motor is de-energized, the door pressing force of the door pressing member is reduced. Since it is provided with a return spring mechanism for operating the door holding member in the direction in which the door is released, the use of an electric motor as a drive source reduces the weight of the vehicle, Was, while achieving a reduction in construction work and maintenance and inspection work, there is an effect that can be reliably performed an air-tight in the vehicle with less power.

[Brief description of the drawings]

FIG. 1 is a front view of a vehicle door provided with a door holding device according to an embodiment of the present invention.

FIG. 2 is a side view of the door.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a front view showing an electric drive unit of the door holding device.

FIG. 5 is a side view of the electric drive unit.

FIG. 6 is a rear view of the electric drive unit.

FIG. 7 is a partial cross-sectional plan view of the electric drive unit.

FIG. 8 is a sectional front view of an electromagnetic brake of the electric drive unit.

FIG. 9A is a plan view of an upper door holding member in the door holding device, and FIG. 9B is a front view thereof.

FIG. 10A is a plan view of a lower door holding member in the door holding device, and FIG. 10B is a front view thereof.

FIG. 11 is a block circuit diagram of a door controller that controls the door holding device.

FIG. 12 is a time chart showing a control operation by the door controller.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Door 11 Seal member 22 Door opening / closing drive motor 30 Door controller 34 Drive circuit 40 Electric drive part 41, 42 Door holding member 44 Drive conversion mechanism 46 Door holding drive motor (electric motor) 47 Motor drive shaft 48 Reduction gear 50 Rotation output shaft 52 Electromagnetic brake 54 Return spring mechanism

Claims (9)

[Claims] 1. A vehicle door holding device for sealing a vehicle door by pressing a vehicle door against a seal member by a door holding member provided in the vicinity of the door, and operates by an electric motor as a drive source and its power. And a drive conversion mechanism for converting the movement of the drive output section of the electric drive section into a door holding operation of the door holding member, and the drive force when the electric motor is energized. The door holding member is configured to operate in a direction of pressing the door against the seal member, and the door holding member is pressed in a direction in which the door holding force by the door holding member is released when the electric motor is not energized. A door holding device for a vehicle, comprising a return spring mechanism for operating a member. 2. The door holding device for a vehicle according to claim 1, wherein both the rotor-side magnet and the stator-side magnet of the electric motor are constituted by electromagnets. . 3. The vehicle door holding device according to claim 1, wherein the return spring mechanism is provided in the electric drive unit, and the return spring mechanism is provided to a drive output unit of the electric drive unit by an elastic force of the return spring mechanism. A door holding device for a vehicle to which an urging force is applied. 4. The door holding device for a vehicle according to claim 3, wherein a plurality of door holding members are connected to the drive output unit via the drive conversion mechanism. 5. The vehicle door holding device according to claim 3, wherein the drive output portion is a rotary output shaft that is rotated by the power of the electric motor, and the drive conversion mechanism is provided at one end of the rotary output shaft. A vehicle door holding device which is connected and provided with the return spring mechanism at the other end. 6. A door holding device for a vehicle according to claim 1, wherein said door holding mechanism receives said electric energy and presses said door against said seal member. A door holding device for a vehicle, comprising: a door holding unit that is switched between a holding state for holding the door and a release state for releasing the holding. 7. The door holding device for a vehicle according to claim 6, wherein the door holding unit is in the holding state when electric energy is not supplied, and is switched to the released state by supplying an exciting current. A door holding device for a vehicle, characterized in that: 8. The vehicle door holding device according to claim 6, wherein the door holding device is an electromagnetic brake directly connected to an output shaft of the electric motor. 9. The vehicle door holding device according to claim 1, further comprising a drive circuit for moving the electric motor, and the drive circuit serving as a drive source for opening and closing the door. A door holding device for a vehicle, which is also used as a drive circuit of a provided door opening / closing electric motor.