JP2002188361A - Automatic opening/closing device of opening/closing body for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic opening/closing device of an opening/closing body for vehicle capable of increasing the reliability of operation by preventing a drive source from being reversely rotated even if the opening/closing body is in the state of receiving a closing moment by the dead weight or the action of an auxiliary energizing means when the opening/closing body is stopped halfway so as to surely stop the opening/closing body. SOLUTION: When the opening/closing body is stopped halfway between a completely closed position and a fully opened position while receiving the closing moment of the dead weight or the action of the auxiliary energizing means, a drive control device 25 supplies a voltage to the drive source 10 in the reverse direction to the closing moment or the action of the auxiliary supplying means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic opening / closing device for an opening / closing body of a vehicle such as an automobile, and more particularly to a swing door or a sliding door provided on the side of the vehicle so as to be openable and closable at a rear portion of the vehicle. The present invention relates to an automatic opening / closing device for a vehicle opening / closing body that opens and closes an opening / closing body such as a door by a drive source such as a motor.

[0002]

2. Description of the Related Art Such an apparatus is disclosed in, for example,
There is one disclosed in Japanese Patent Publication No. 1852. That is, a vehicle opening / closing body that opens and closes a back door with a motor and is assisted by a gas stay is disclosed.

In such an opening / closing body, when the opening / closing body is stopped halfway between the fully open position and the fully closed position, a closing moment due to its own weight or an urging force of a gas stay acts on the opening / closing body, and the speed reducer is operated. The motor is rotated in reverse to move the opening / closing body from the stop position.

Further, in a sliding door or a swing door, when the opening / closing body is stopped halfway between a fully open position and a fully closed position in a state where the vehicle is inclined in the front-rear direction as if the vehicle is stopped on a slope. Depending on the state of the inclination, a closing moment due to its own weight acts on the opening / closing body, which may cause the motor to reversely rotate via the reduction gear and move the opening / closing body from the stop position.

In order to prevent the movement of the opening / closing member when the opening / closing member stops halfway, it is conceivable to form the motor drive circuit in a closed circuit while the clutch is kept connected when the motor stops. This is to take advantage of the fact that when the motor is to be rotated from the open / close body side, a power generation resistance is generated in the motor and the brake is applied in order to oppose the load applied from the open / close body. However, if the closing moment acting on the opening / closing body or the biasing force of the gas stay is applied beyond the limit, the opening / closing body cannot be stopped completely and the opening / closing body may move from the stop position even though it is electrically stopped. Yes, the operation reliability may be reduced.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of such problems of the prior art. When the opening / closing body is stopped halfway, the opening / closing body is closed by its own weight or an auxiliary biasing force. It is an object of the present invention to provide an automatic opening / closing device for a vehicle opening / closing body that prevents the motor from being reversely rotated even when it is under the action of the means, stops the opening / closing body reliably, and improves operation reliability. Aim.

[0007]

According to the first aspect of the present invention,
An opening / closing body which is supported by the vehicle body so as to be openable and closable and can be opened and closed between a fully closed position and a fully open position by an opening and closing device; and a movement detecting means capable of detecting the opening / closing movement of the opening / closing body and detecting the opening / closing direction A drive control device for controlling the amount and direction of a voltage applied to a drive source for opening and closing the opening and closing body, wherein the opening and closing body includes a closing moment or an auxiliary bias due to its own weight. When the drive control device stops halfway between the fully closed position and the fully open position while receiving the action of the means, the drive control device applies a voltage to the drive source in the direction opposite to the direction of the action of the closing moment or the auxiliary biasing means. It is characterized by applying.

According to the first aspect of the present invention, when the opening / closing member is stopped halfway, the opening / closing device is reversed even if the closing moment due to its own weight or the auxiliary urging means is acting on the opening / closing member. , And the opening / closing body is reliably stopped, so that the operation reliability of the automatic opening / closing device for the vehicle opening / closing body is improved.

According to a second aspect of the present invention, the drive control device determines the predetermined value immediately after the stop operation from the opening degree at the time of the stop operation of the opening / closing body, the speed of the opening / closing body immediately before the stop operation, or the drive current value immediately before the stop operation. A voltage in an amount and a direction determined according to a condition is applied to the drive source.

According to the second aspect of the present invention, the amount and direction of the voltage applied to the drive source by the drive control device are the opening degree at the time of the stop operation of the opening / closing body, the speed of the opening / closing body immediately before the stop operation, or the time immediately before the stop operation. Is determined according to a predetermined condition from the driving current value of the driving source, the reverse rotation of the driving source can be prevented by simple control, and the opening / closing body can be reliably stopped, so that the driving control device can be simplified and the cost can be reduced. .

According to a third aspect of the present invention, when the movement of the opening / closing member is confirmed after the application of the voltage, the drive control device operates in a direction opposite to the moving direction of the opening / closing member until the stop of the opening / closing member is confirmed. And applying a voltage to the drive source.

According to the third aspect of the present invention, the voltage is applied to the driving device until the stop is confirmed in the direction corresponding to the state of the opening / closing body, so that it is possible to appropriately cope with the external force applied to the opening / closing body. In addition, the opening / closing body can be reliably stopped by preventing the reverse rotation of the driving source.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. A back door 3 that closes an opening 2 provided at a rear end portion of a vehicle body 1 of the vehicle shown in FIG. 1 is pivotally supported by a hinge 4 provided at an upper edge of the opening 2. The hinge 4 is a hinge pin 4 supported in the horizontal direction.
a, and the back door 3 can be opened and closed in the vertical direction about the hinge pin 4a.

The lower end of the back door 3 is engaged with a striker (not shown) fixed to the vehicle body 1,
Door lock device 5 for holding back door 3 in fully closed position B
Are arranged. The door lock device 5 has a release actuator (not shown) that electrically releases the lock.

Reference numeral 6 denotes one end 6a connected to the vehicle body 1 by the other end 6a.
b is a gas stay which is a telescopic "auxiliary urging means" connected to the back door 3, and both end portions 6a and 6b are formed of ball joints to follow the opening and closing of the back door 3. The gas stay 6 is filled with compressed gas therein and is urged in the extending direction, and generates an auxiliary urging force for opening and closing the back door 3. That is, the other end portion 6b, which is a connecting portion of the gas stay 6 to the back door 3, performs a swinging motion about the hinge pin 4a of the back door 3. On the other hand, one end 6 a of the gas stay 6, which is a connecting portion on the vehicle body 1 side, is pivotally supported, and the other end 6 b of the gas stay 6 is pivoted by the back door 3.
An arc motion is performed around a. At this time, the other end 6b of the gas stay 6 expands and contracts while swinging with respect to the one end 6a.

As shown in FIG. 4, between the fully open position A and the fully closed position B, there is a neutral position C where the biasing force of the gas stay 6 and the closing moment due to the weight of the back door 3 are balanced. Exists. In the swing position other than the neutral position C, the back door 3 receives a force in the opening direction between the neutral position C and the fully open position A, and in the closing direction between the neutral position C and the fully closed position B.

When the back door 3 is to be opened from the fully closed position B, the door lock device 5 is released, and the back door 3 is lifted until it exceeds the neutral position C of the gas stay 6. When the neutral position C is exceeded, the biasing force of the gas stay 6 becomes larger than the closing moment due to its own weight acting on the back door 3, so that the back door 3 does not need to be operated in the opening direction.
Swings to the fully open position A by the urging force of the gas stay 6.

When swinging the back door 3 from the fully open position A in the closing direction, the back door 3 is swung to a position beyond the neutral position C against the urging force of the gas stay 6 in reverse to the opening operation. When the neutral position C is exceeded, the closing moment applied to the back door 3 becomes larger than the urging force of the gas stay 6, so that the back door 3 itself swings to the fully closed position B without applying an operating force in the closing direction. I do. By cooperating with the operation of the gas stay 6, the opening / closing device 8 described later can open and close the back door 3 even if the driving force is small.

An opening / closing device 8 is attached to a roof panel 7 at the rear end of the vehicle body 1 by a bracket 8a, and the inside of the room is covered with a trim (not shown). Bracket 8a
Is fixed to a speed reduction mechanism 11 to which a motor 10 that can rotate forward and backward is attached.

In the case 11a of the speed reduction mechanism 11, FIG.
As shown in the figure, the large-diameter gear portion 12a of the first reduction gear 12 meshes with the output gear 10a of the motor 10. The input gear portion 13a of the electromagnetic clutch 13 that connects and disconnects the transmission of the driving force is engaged with the small-diameter gear portion 12b of the first reduction gear 12. The large-diameter gear portion 14a of the second reduction gear 14 meshes with the output gear portion 13b of the electromagnetic clutch 13.
An input gear 15a of a rotary encoder 15 for detecting an electric pulse is provided on a large-diameter gear portion 14a of the second reduction gear 14.
Are engaged. Small-diameter gear portion 14 of second reduction gear 14
b, the large-diameter gear portion 16a of the pinion 16 meshes with the pinion 16, and the output gear portion 16b is
a.

The signal detected by the rotary encoder 15 is used for controlling the operation of the switching device 8. The input of the rotary encoder 15 is the output gear 1 of the electromagnetic clutch 13.
Since it is taken from the second reduction gear 14 on the 3b side, it is possible to detect the movement when the back door 3 is manually opened and closed without disconnecting the electromagnetic clutch 13 and driving the motor 10.

The teeth 17a of the rack 17 are
The pinion 16 is engaged with the output gear portion 16b of the pinion 16 and is held by the holding portion 18 so as to be movable in the longitudinal direction. The holding portion 18 is supported by the case 11a of the speed reduction mechanism 11 so as to be swingable about the same rotation center as the pinion 16, and a cover 19 is covered from the outside.

One end 17b of the rack 17 is provided with an arm member 3a projecting toward the indoor side above the back door 3 and a shaft 17c.
And are rotatably connected.

In the fully closed position B indicated by the solid line in FIG. 1, when the operation switch 24 is operated in the opening direction, the motor 10 rotates forward and the pinion 16 rotates forward via the speed reduction mechanism 11. Then, the rack 17 meshed with the pinion 16 moves rearward as the pinion 16 rotates. At this time, at the same time as the rack 17 moves rearward, the rack 17 also moves upward along with the swinging movement about the hinge pin 4a of the back door 3, and the back door 3 passes through the neutral position C and reaches the fully open position A. I do.

The above description has been given of the situation in which the drive is performed from the fully closed position B to the fully open position A. However, when the drive is performed from the fully open position A to the fully closed position B, the procedure is reversed, and the description is omitted.

Next, the drive control device 25 will be described. FIG. 5 is a block diagram showing a drive control device 25 according to the present embodiment.
Reference numeral 3 denotes an electromagnetic clutch, reference numeral 24 denotes an operation switch provided at an appropriate place near the driver's seat or near the back door 3, and reference numeral 26 denotes a battery which is a "power supply". A rotary encoder 15 detects the movement of the back door 3 and recognizes the movement of the back door 3 as the number of pulses. Reference numeral 33 denotes an ammeter for detecting a drive current value of the motor.

The drive control unit 25 has a main control unit 27 for controlling the output according to the input signals from the operation switch 24 and the rotary encoder 15. Main control unit 2
On the input side of 7, there is provided an operation unit 28 which performs an arithmetic operation on the pulse signal from the rotary encoder 15 and sends it to the main control unit 27. On the output side of the main control unit 27, a voltage control unit 29 that controls the motor 10 in accordance with an output signal from the main control unit 27, an opening driving unit 30, a closing driving unit 31, and a clutch driving unit 32 that controls an electromagnetic clutch. Is provided.

The operation switch 24, the rotary encoder 15, and the ammeter 33 are connected to the drive control device 2 as input devices.
5 is connected. The motor 10 and the electromagnetic clutch 13 are connected to the drive control device 25 as outputs. The battery 26 includes the motor 10 and the drive control device 25.
It is connected to the drive control device 25 as its own power supply.

The operation switch 24 is a door opening switch 24.
a and a door closing switch 24b, which are respectively connected to the main control unit 27 of the drive control device 25. The stop operation operates the door opening switch 24a or the door closing switch 24b again during the operation. Although a switch dedicated to stop may be provided separately, it is advantageous to operate the door opening switch 24a and the door closing switch 24b again because the number of components can be reduced.

The rotary encoder 15 detects not only the position of the back door 3 but also the moving direction.
It is possible to generate two phase pulse signals having different degrees. The rotary encoder 15 detects a pulse signal as the back door 3 moves, and
8 has been entered.

The pulse signal input to the arithmetic unit 28 is calculated into a rotation direction detection value, a position detection value, and a speed detection value, and is input to the main control unit 27. The detected speed value is obtained by differentiating the detected position value from the rotary encoder 15 with the value of the clock signal, which is a unit time element.
From the ammeter 33, a drive current value for driving the motor 10 is input to the drive control device 25 as the back door moves.

A drive control signal is output from the main control unit 27 to one of the door drive unit 30 and the door drive unit 31. The drive current for which the polarity in the motor rotation direction has been determined by the door drive unit 30 or the door drive unit 31 is then adjusted to an appropriate voltage by the voltage control unit 29. The drive current whose polarity and voltage have been adjusted is connected to the motor 10 from the voltage control unit 29.

From the main control unit 27, a clutch driving unit 32
The driving signal is output to From the clutch drive unit 32,
The driving current for driving the electromagnetic clutch 13 is the electromagnetic clutch 1
3 is connected.

Next, with reference to the flowchart of FIG. 6, a description will be given of the movement prevention control when the back door 3 stops halfway.

First, the operation switch 24 is operated during electric operation of the door.
Is stopped (step S1). With the current supply to the electromagnetic clutch 13 continued, only the drive current supplied to the motor 10 is stopped (step S2), and the back door 3 is stopped halfway (step S3). After the back door 3 stops halfway, a voltage set under predetermined conditions is immediately applied according to the stop position (step S).
4). The amount and direction of the set voltage are determined by the backdoor 3
Of the back door 3 immediately before the stop operation and the drive current value immediately before the stop operation are determined by predetermined conditions to be described later.

After the voltage is applied, the speed and direction in which the back door 3 moves are detected by the rotary encoder 15 as a speed detection value and a rotation direction detection value, and it is confirmed whether the back door 3 moves in a direction opposite to the direction in which the voltage is applied. (Step S5).

If it is determined in step S5 that the back door 3 does not move in the direction opposite to the direction in which the voltage is applied, it is checked whether the back door 3 moves in the direction in which the voltage is applied (step S7). If the back door 3 does not move in the direction to which the voltage is applied in step S7, the back door 3 is completely stopped halfway, and the process ends.

If the back door 3 moves in the direction opposite to the direction in which the voltage was applied in step S5, the applied voltage is increased by a predetermined value α and applied again in the same direction as the previous time (step S6).

When the back door 3 moves in the direction in which the voltage is applied in step S7, the applied voltage is reduced by a predetermined value α, and the voltage is applied again in the same direction as the previous time (step S8).
The moving direction and speed of the back door 3 are checked again (step S9).

If the back door 3 moves in the direction opposite to the direction in which the voltage is reapplied in step S9, the process returns to step S9.
7 is performed. If the back door 3 moves in the direction in which the voltage is reapplied in step S9, the process of step S5 is performed again.

Next, the conditions for adjusting the applied voltage in step S4 will be described separately for the door opening, the motor current, and the door speed. An important factor in each condition is whether the urging force of the gas stay 6 serves as an assisting force or a resisting force with respect to the driving force of the motor 10. Here, when the position of the back door 3 is between the fully closed position B and the neutral position C, the direction closer to the neutral position C becomes larger when the position of the back door 3 is between the neutral position C and the fully open position A. The closer to the fully open position A, the greater the door opening.

(Conditions when the door opening is large) When the door opening is large, the door position is in the fully closed position to the neutral position, and the operation direction of the door by the motor (hereinafter the same) is the opening direction, ,
The applied voltage is small and the application direction is the opening direction. When the door opening degree is large, the door position is the fully closed position to the neutral position, and the operation direction is the closing direction, the applied voltage is small and the applied direction is the opening direction. When the door opening degree is large, the door position is the neutral position to the fully opened position, and the operation direction is the open direction, the applied voltage is large and the applied direction is the closed direction. When the door opening degree is large, the door position is the neutral position to the fully opened position, and the operation direction is the closing direction, the applied voltage is large and the applied direction is the closing direction.

(Conditions when the door opening is small) When the door opening is small, the door position is in the fully closed position to the neutral position, and the operation direction is the opening direction, the applied voltage is large and the applied direction is large. Is the opening direction. Door opening is small and door position is fully closed
When the operation direction is the closing direction at the neutral position, the applied voltage is large and the applied direction is the open direction. When the door opening degree is small, the door position is the neutral position to the fully opened position, and the operation direction is the open direction, the applied voltage is small and the applied direction is the closed direction. When the door opening degree is small, the door position is in the neutral position to the fully opened position, and the operation direction is the closing direction, the applied voltage is small and the applied direction is the closing direction.

(Conditions when the motor current is large) When the motor current is large, the door position is the fully closed position to the neutral position, and the operation direction is the open direction, the applied voltage is large and the applied direction is open. Direction. When the motor current is large, the door position is the fully closed position to the neutral position, and the operation direction is the closing direction, the applied voltage is small and the applied direction is the open direction. When the motor current is large, the door position is the neutral position to the fully open position, and the operation direction is the open direction, the applied voltage is small and the applied direction is the closed direction. When the motor current is large, the door position is in the neutral position to the fully open position, and the operation direction is the closing direction, the applied voltage is large and the applied direction is the closing direction.

(Conditions when the motor current is small) When the motor current is small, the door position is the fully closed position to the neutral position, and the operation direction is the open direction, the applied voltage is small and the applied direction is open. Direction. When the motor current is small, the door position is the fully closed position to the neutral position, and the operation direction is the closing direction, the applied voltage is large and the applied direction is the open direction. When the motor current is small, the door position is in the neutral position to the fully open position, and the operation direction is the open direction, the applied voltage is large and the applied direction is the closed direction. When the motor current is small, the door position is in the neutral position to the fully open position, and the operation direction is the closing direction, the applied voltage is small and the applied direction is the closing direction.

(Conditions when the door speed is high) When the door speed is high and the door position is between the fully closed position and the neutral position,
When the operation direction is the open direction, the applied voltage is small and the applied direction is the open direction. When the door speed is fast, the door position is the fully closed position to the neutral position, and the operation direction is the closing direction,
The applied voltage is large and the application direction is the opening direction. When the door speed is high, the door position is in the neutral position to the fully open position, and the operation direction is the open direction, the applied voltage is large and the applied direction is the closed direction. When the door speed is high, the door position is in the neutral position to the fully open position, and when the operation direction is the closing direction, the applied voltage is small and the applied direction is the closing direction.

(Conditions when the door speed is low) When the door speed is low and the door position is between the fully closed position and the neutral position,
When the operation direction is the open direction, the applied voltage is large and the applied direction is the open direction. When the door speed is low, the door position is the fully closed position to the neutral position, and the operation direction is the closing direction,
The applied voltage is small and the application direction is the opening direction. When the door speed is low, the door position is in the neutral position to the fully open position, and the operation direction is the open direction, the applied voltage is small and the applied direction is the closed direction. When the door speed is low, the door position is in the neutral position to the fully open position, and the operation direction is the closing direction, the applied voltage is large and the applied direction is the closing direction.

Under the above conditions, the door opening, the motor current, and the door speed determine the amount and direction of the applied voltage.

In this embodiment, an example in which the automatic opening / closing device of the present invention is applied to the back door 3 has been described. However, the present invention is not limited to this, and a swing door or a sliding door driven by a motor 10 is used. Can be applied in the same way.

[0050]

According to the first aspect of the present invention, even when the opening / closing member is stopped halfway, the opening / closing device is reversed even when the closing moment due to its own weight or the auxiliary biasing means acts on the opening / closing member. This prevents the opening / closing body from being stopped, so that the operation reliability of the automatic opening / closing device for the vehicle opening / closing body is improved.

According to the second aspect of the present invention, the amount and direction of the voltage applied to the drive source by the drive control device are determined by the opening at the time of the stop operation of the opening / closing body, the speed of the opening / closing body immediately before the stop operation, or the time immediately before the stop operation. Is determined according to a predetermined condition from the drive current value of the drive source, the reverse rotation of the drive source can be prevented by simple control, and the opening / closing body can be reliably stopped, so that the drive control device can be simplified and the cost can be reduced. .

According to the third aspect of the present invention, the voltage is applied to the driving device until the stop is confirmed in the direction corresponding to the state of the opening / closing body, so that it is possible to appropriately cope with the external force applied to the opening / closing body. In addition, the opening / closing body can be reliably stopped by preventing the reverse rotation of the driving source.

[Brief description of the drawings]

FIG. 1 is a side view of a vehicle to which an opening / closing device according to an embodiment of the present invention is attached.

FIG. 2 is a view taken along a line II in FIG.

FIG. 3 is a sectional view taken along line III-III in FIG. 1;

FIG. 4 is an explanatory diagram showing a relationship between a force applied to the opening / closing device from a back door and an opening degree.

FIG. 5 is a block diagram of a drive control device for the opening / closing body according to the embodiment of the present invention.

FIG. 6 is a flowchart showing a flow of operation of the opening / closing body according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body 3 Back door (opening / closing body) 6 Gas stay (auxiliary biasing means) 8 Opening / closing device 10 Motor (drive source) 25 Drive control device

Claims (3)

[Claims] An opening / closing body which is supported by a vehicle body so as to be openable and closable and which can be opened and closed between a fully closed position and a fully open position by an opening and closing device; an opening and closing movement of the opening and closing body and a direction of opening and closing movement can be detected. An automatic opening / closing device for a vehicle opening / closing body, comprising: a movement detection unit, and a drive control device that controls an amount and a direction of a voltage applied to a drive source that opens and closes the opening / closing body. When stopping halfway between the fully-closed position and the fully-open position while receiving the action of the moment or the auxiliary biasing means, the drive control device sets a direction opposite to the direction of the action of the closing moment or the auxiliary biasing means, An automatic opening / closing device for a vehicle opening / closing body, which applies a voltage to a driving source. 2. The automatic opening / closing device for a vehicle opening / closing body according to claim 1, wherein the drive control device immediately after the stop operation, the opening degree at the time of the stop operation of the opening / closing body, and the opening / closing body of the opening / closing body immediately before the stop operation. An automatic opening / closing device for a vehicle opening / closing body, wherein a voltage in an amount and direction determined according to predetermined conditions from a speed or a motor current value immediately before a stop operation is applied to a drive source. 3. The automatic opening / closing device for a vehicle opening / closing body according to claim 1, wherein the drive control device confirms stoppage of the opening / closing body when the movement of the opening / closing body is confirmed after voltage application. An automatic opening / closing device for a vehicle opening / closing body, wherein a voltage is applied to a drive source in a direction opposite to a direction in which the opening / closing body moves until the opening / closing body moves.