JP2009108493A - Opening/closing member control unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an opening/closing member control unit which can establish inexpensive compatibility between the prevention of pinching and the security of closing, without complicating a product structure and a constitution of a circuit. <P>SOLUTION: This opening/closing member control unit comprises an opening/closing member 11, a motor 20, and a control section 3 for controlling the motor 20. The control section 3 is equipped with a load detecting means for detecting a load applied to the motor 20, and a direction-of-rotation switching means for making the motor 20 run in a reverse direction when the load applied to the motor 20 during opening/closing drive reaches a predetermined amount or above. The direction-of-rotation switching means rotatively drives the motor 20 in the reverse direction so that the opening/closing member 11 can be lowered within a range in which an upper end of the opening/closing member 11 can maintain the state of being covered with a seal member U, when the load detected by the load detecting means and applied to the motor 20 reaches the predetermined amount or above. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an opening / closing member control apparatus, and more particularly, to an opening / closing member control apparatus capable of detecting a foreign object caught by the opening / closing member.

Currently, in a car opening / closing member control device, when a foreign object is caught during a closing operation, it is detected that the foreign object has been caught due to a change in the speed of a motor that drives the opening / closing member. In such a case, the mainstream is one that has a pinching prevention function that immediately stops the closing operation of the opening and closing member and switches to the opening operation.
When the pinching prevention mechanism is provided as described above, it is common to provide a region (so-called “dead zone”) in which the pinching prevention function does not function in order to prevent erroneous pinching detection due to a load when the window glass is fully closed. .
In other words, in order to prevent the load caused by the contact between the weather strip and the upper end of the window glass, which occurs when the window glass reaches the fully closed position, from being erroneously determined as a load caused by pinching, this region is A dead zone is set (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 61-064982

In the technique of Patent Document 1, a dangerous area where foreign objects are likely to be caught and a safe area where there is very little possibility of being caught are set according to the rising position of the window glass.
The boundary between the safety area and the danger area is set at a position where the distance between the upper end of the window glass and the lower end of the window frame is 5 mm, and the upper side from this position is the safety area.
In this danger zone, a reference current value is set, and when the motor load current value exceeds this reference current value, it is determined that there is jamming, the closing operation is stopped, and the window glass is forcibly Switch to open operation.
On the other hand, in the safety area, pinching detection is not performed, and if the motor load current value exceeds the reference current value set higher than the reference current value in the dangerous area, the upper end of the window glass contacts the lower end of the window frame. It is judged that it has been performed, and after holding for a predetermined time in this state, the closing operation is terminated.
As described above, the technique of Patent Document 1 achieves both prevention of pinching when pinching occurs and guarantee of closing when there is no pinching.

However, in the technique of Patent Document 1, in order to perform control in this safety zone, it is necessary to provide mechanism parts for the motor and the regulator. When the mechanical parts are provided in this way, there is a problem that the product structure becomes complicated and the manufacturing cost increases.
Further, even when not provided as a mechanical component, if the position of the window glass is detected using a Hall IC or the like and computer processing is performed, there is a problem that the circuit configuration becomes complicated and the manufacturing cost increases.
Also, in order to ensure closing, the upper end of the window glass and the lower end of the window frame are in contact with each other for a predetermined time, so that an excessive load is applied to the motor and the upper end of the window glass is in press contact with the lower end of the window frame. Since the closing operation is completed, there is a problem that an excessive load is constantly applied to the entire system.

  SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and to provide an opening / closing member control device capable of achieving both prevention of pinching and guarantee of closing without complicating the product structure and circuit configuration. There is to do.

  An object of the present invention is to provide an opening / closing member control apparatus according to the present invention, an opening / closing member, a motor that surrounds the outer periphery of the opening / closing member and guides the opening / closing operation, and a motor that drives the opening / closing member, An opening / closing member control apparatus comprising: a control unit that performs control; wherein the control unit includes a load detection unit that detects a load applied to the motor during opening / closing driving, and a load applied to the motor is equal to or greater than a predetermined amount. A rotation direction switching means for rotating the motor in the reverse direction is provided, and the rotation direction switching means detects that the load applied to the motor detected by the load detection means exceeds a predetermined amount. In the case, the opening / closing member is disposed on at least an upper side portion of the frame and seals at least an upper end portion of the opening / closing member when the opening / closing member is fully closed To the extent that maintain the state in which the upper portion is covered, so that the closing member is lowered, is solved by rotationally driving the motor in the reverse direction.

Thus, in the present invention, the rotation direction switching means of the control unit reverses the rotation direction of the motor when the load applied to the motor exceeds a predetermined amount.
At this time, the rotation direction switching means drives the motor to rotate in the reverse direction so that the opening / closing member descends within a range in which the upper end of the opening / closing member can be kept covered by the sealing member.
The load detected by the load detection means exceeds a predetermined amount when there is a pinch and when the upper end of the opening / closing member comes into contact with the seal member (that is, when it is fully closed). .
When pinching occurs, the rotation direction switching means reversely rotates the motor and the opening / closing member descends, so that the pinched portion is released.
Therefore, it is possible to reliably prevent foreign matter from being caught.

Also, when the upper end of the opening / closing member comes into pressure contact with the seal member (that is, when the opening / closing member reaches the uppermost portion), the motor reversely rotates by the rotation direction switching means, and the opening / closing member descends.
At this time, the rotation direction switching means drives the motor to rotate in the reverse direction so that the opening / closing member descends within a range in which the upper end of the opening / closing member can be kept covered by the sealing member.
Therefore, in the fully closed state, the opening / closing member is positioned slightly below the uppermost portion, and the upper end portion of the opening / closing member is not in pressure contact with the seal member. For this reason, even when the open / close member is in the fully closed state, an extra load is not applied to the upper end of the open / close member, so that it is possible to prevent the motor and the entire system from being applied with a load.

In addition, since the motor is driven to rotate in the reverse direction so that the opening and closing member descends within a range in which the upper end of the opening and closing member can be covered with the seal member, waterproofness can be reliably ensured.
Therefore, it is possible to achieve both prevention of pinching and guarantee of closing without complicating a special product structure or circuit configuration with a simple configuration.

Further, at this time, the rotation direction switching means is configured to rotate the motor in the reverse direction for a predetermined time from when the load applied to the motor becomes equal to or greater than a predetermined amount.
Since the size and the like of the seal member are known, the upper end portion of the window glass can be stopped inside the weather strip by adjusting the time for driving the motor in the reverse direction.
For this reason, a special sensor or the like is unnecessary, and the moving distance of the opening / closing member can be defined only by the timer.
Therefore, waterproofness can be simultaneously ensured with a simple configuration.

Further, at this time, the rotation direction switching means is configured to rotate the motor in the reverse direction from when the load applied to the motor becomes a predetermined amount or more until the opening / closing member descends a predetermined distance.
The motor generates a ripple current.
This ripple current waveform is generated by a change in the number of effective conductors, and the number of the chevron waveforms depends on the number of segments of the commutator.

That is, the rotational speed of the motor can be grasped by detecting the ripple current waveform and counting the mountain-shaped waveform.
In addition, since the movement distance of the opening / closing member when the motor makes one revolution can be easily calculated from the gear ratio, etc., the movement distance of the opening / closing member can be grasped by counting the peak waveform of this ripple current. It becomes possible to do.
For this reason, a special sensor or the like is unnecessary, and the moving distance of the opening / closing member can be defined only by using the ripple current.
Therefore, waterproofness can be simultaneously ensured with a simple configuration.

  Further, at this time, in the fully closed state of the opening / closing member, if the opening / closing member and the sealing member are in contact with each other over the entire range of the sealing member, the waterproof property is further improved, and the shut-off guarantee is ensured. A waterproof guarantee can be realized.

According to the present invention, it is possible to achieve both prevention of pinching and guarantee of closing without complicating the product structure and circuit configuration.
Further, according to the present invention, it is possible to avoid an excessive load from being continuously applied to the motor and the entire system at the time of closing.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
Note that the configuration described below does not limit the present invention and can be variously modified within the scope of the gist of the present invention.
The present embodiment relates to an opening / closing member control device capable of achieving both prevention of pinching and ensuring of closing without complicating the product structure and circuit configuration.

1 to 9 show an embodiment of the present invention. FIG. 1 is an explanatory diagram of a power window device, FIG. 2 is an electrical configuration diagram of the power window device, FIG. 3 is a circuit diagram of a drive circuit, and FIG. 4 is a current waveform diagram, FIG. 5 is a correlation diagram of ripple current and armature rotation angle, FIG. 6 is a flowchart showing a window glass closing operation process, and FIG. 7 is a current value, motor output, jamming load, and window when jamming is detected. FIG. 8 is a correlation diagram of glass position, FIG. 8 is a correlation diagram of current value, motor output, pinching load, and window glass position when no pinching is detected, and FIG. 9 is an explanatory diagram showing the position of the upper end of the window glass in the fully closed state. .
FIG. 10 is a flowchart showing a window glass closing operation process according to another embodiment.

Hereinafter, an embodiment in which the present invention is applied to a power window device will be described.
FIG. 1 is an explanatory diagram of a power window device 1 according to the present embodiment, FIG. 2 is an electrical configuration diagram thereof, and FIG. 3 is a circuit diagram of a drive circuit.
The power window device 1 according to the present embodiment is configured to raise and lower (open and close) a window glass 11 as an opening and closing member disposed on a door 10 of a vehicle by rotational driving of a motor 20. The power window device 1 includes, as main components, an elevating mechanism 2 that drives the window glass 11 to open and close, a control unit 3 that controls the operation of the elevating mechanism 2, and an operation switch 4 that is used by an occupant to command the operation. .

In the present embodiment, the window glass 11 moves up and down between an upper fully closed position and a lower fully opened position along a rail (not shown).
A weather strip U serving as a sealing member is disposed on the upper side of the window frame W, which is a frame of the window glass 11, along the frame.
The weather strip U is a known weather strip made of an elastic resin, and serves as a seal when the window glass 11 is fully closed to prevent wind and rain from being blown into the vehicle.

In the present embodiment, the weather strip U is used as the sealing member, but any material can be used as long as the sealing property and waterproofness of the window frame W and the window glass 11 can be guaranteed. .
When the weather strip U and the glass run are provided as separate members, the glass run functions as a seal member according to the present embodiment.

  The elevating mechanism 2 according to this embodiment includes a motor 20 having a speed reducing mechanism fixed to the door 10, an elevating arm 21 having a fan-shaped gear 21 a driven by the motor 20, and the elevating arm 21 in a crossing manner. The main component is a follower arm 22 pivotally supported, a fixed channel 23 fixed to the door 10, and a glass side channel 24 integrated with the window glass 11.

  The motor 20 according to the present embodiment is energized to the winding of the rotor by receiving power supply from the control unit 3, thereby causing a magnetic attraction action between the rotor and the stator having the magnet to rotate. The child is configured to rotate forward and backward. In the elevating mechanism 2 of this example, when the elevating arm 21 and the driven arm 22 are swung in accordance with the rotation of the motor 20, these end portions are subjected to sliding regulation by the channels 23 and 24 and are driven as X links. Then, the window glass 11 is moved up and down.

The motor 20 according to the present embodiment is not provided with a conventional rotation detection device (position detection device). The rotation detection device outputs a pulse signal (speed detection signal, rotation speed signal, etc.) synchronized with the rotation of the motor 20 to the control unit 3, and detects a plurality of magnetic changes of the magnet that rotates together with the output shaft of the motor 20. Usually, an encoder or the like configured to detect with the Hall element is used.
That is, conventionally, as shown in FIG. 2 (b), a rotation sensor is generally provided with a pulse sensor or the like.
However, as shown in FIG. 2A, in the present embodiment, since such an apparatus is not necessary, the product structure can be prevented from becoming complicated, and the problem of an increase in manufacturing cost can be solved. .

The control unit 3 according to this embodiment includes a controller 31 and a drive circuit 32. The controller 31 and the drive circuit 32 are configured to be supplied with electric power necessary for operation from a battery 5 mounted on the vehicle.
The controller 31 according to the present embodiment includes a microcomputer including a memory (not shown) such as a CPU, a ROM, and a RAM, various timers, an input circuit, an output circuit, and the like.
In the CPU, a memory (not shown), an input circuit, and an output circuit are connected to each other via a bus. The controller 31 is not limited to this, and may be configured by a DSP or a gate array.

The controller 31 normally opens and closes the window glass 11 by rotating the motor 20 forward and backward via the drive circuit 32 based on the operation signal from the operation switch 4.
FIG. 3 shows a circuit configuration example of the drive circuit 32 according to the present embodiment.
Note that FIG. 3 is an example for implementation, and the present invention is not limited to this. Any circuit configuration may be used as long as it does not depart from the gist of the present invention.

As shown in FIG. 3, the operation switch 4 of the power window device 1 is installed on the driver seat side, the passenger seat side, and the rear seat side. Illustration of the operation switch 4 is omitted.
The operation switch 4 according to the present embodiment is configured by a swing type switch that can be operated in two steps, and has an open switch, a close switch, and an auto switch. When the occupant operates the operation switch 4, a command signal for opening and closing the window glass 11 is output to the controller 31.

  Specifically, when the operation switch 4 is operated one step toward one end, the opening switch is turned on, and a normal opening command signal for normally opening the window glass 11 (that is, opening operation only during the operation). Is output to the controller 31. Further, when the operation switch 4 is operated one step to the other end side, the closing switch is turned on, and a normal close command signal for causing the window glass 11 to be normally closed (that is, only during the operation) is supplied to the controller. To 31.

  Further, when the operation switch 4 is operated in two steps toward one end, both the opening switch and the auto switch are turned on, and the auto switch for automatically opening the window glass 11 (that is, opening to the fully opened position even if the operation is stopped). An open command signal is output to the controller 31. Further, when the operation switch 4 is operated in two steps to the other end side, both the closing switch and the auto switch are turned on, and the window glass 11 is automatically closed (that is, closed to the fully closed position even if the operation is stopped). Is output to the controller 31.

While receiving the normal opening command signal from the operation switch 4 (while the operation switch 4 is being operated), the controller 31 drives the motor 20 via the drive circuit 32 to normally open the window glass 11. Let On the other hand, the controller 31 drives the motor 20 via the drive circuit 32 while receiving the normal close command signal from the operation switch 4 (while the operation switch 4 is being operated), so that the window glass 11 is normally operated. Close operation.
When the controller 31 receives an auto-open command signal from the operation switch 4, the controller 31 drives the motor 20 via the drive circuit 32 to automatically open the window glass 11 to the fully open position. On the other hand, when receiving an auto close command signal from the operation switch 4, the controller 31 drives the motor 20 via the drive circuit 32 to cause the window glass 11 to automatically close to the fully closed position.

The circuit configuration will be described below with reference to FIG.
In FIG. 3, the controller 31 and the operation switch 4 are connected by a line 11 to a line 14. In FIG. 2, these lines 11 to 14 are collectively referred to as “line L1”.
The controller 31 and the drive circuit 32 are connected by lines 15 to 18. In FIG. 2, the lines 14 to 17 are collectively referred to as “line L2”.

Each command transmitted by operating an on-vehicle operation switch 4 (not shown) is input to a circuit of the operation switch 4.
This command is determined based on the connection state of the switches SW1 to SW4, and this connection state is input to the controller 31 via the lines l1 to l4.

The connection pattern of these switches SW1 to SW4 is as follows. When SW1 is connected, an auto-close operation that rises to full close with one touch, when SW2 is connected, a manual close operation that arbitrarily rises in the closing direction, and SW3 is connected When this is done, there are four ways: a manual opening operation that is arbitrarily lowered in the opening direction, and an automatic opening operation that is lowered to full opening when SW4 is connected.
Since SW1 is turned on via SW2, SW2 is also turned on simultaneously when SW1 is turned on. Since SW4 is turned on via SW3, when SW4 is turned on, SW3 is also turned on simultaneously.

The controller 31 is supplied with power from the battery 5.
Lines a and b connected to SW1 to SW4 are supplied with power from an ignition power supply.
The motor 20 is supplied with power from an ignition power supply via relay circuits R1 and R2.
The relay circuit R1 includes a switch r11 and a coil r12. When power is supplied to the coil r12, the switch r11 is connected to the line c and turned on. On the other hand, the relay circuit R2 includes a switch r21 and a coil r22. When power is supplied to the coil, the switch r21 is connected to the line d and turned on. The switches r11 and r21 are both grounded via the line e in a state where the coil is not energized.
Energization of the coil r12 and the coil r22 is set by a terminal p1 (connected to the line 15) and a terminal p2 (connected to the line l6) of the controller 31, respectively.

  In such a circuit configuration, when it is desired to raise the window glass 11, the coil r12 is energized by turning on SW1 or SW2 and grounding the terminal p1 of the controller 31, and the switch r11 is connected to the ignition power source. . The ignition power source enters the motor 20 from the line f and is energized from the line g to the line e through the switch r21 and the shunt resistor K. At this time, the controller 31 can detect the ripple current output from the motor 20 via the line 17 branched from the switch r21.

  Conversely, to lower the window glass 11, the coil r22 is energized by turning on SW3 or SW4 and grounding the terminal p2 of the controller 31, and the switch r21 is connected to the ignition power source. The ignition power supply enters the motor 20 from the line g, and is energized to the line e from the line f through the switch r11 and the shunt resistor K.

In the present embodiment, a method for detecting the position of the window glass 11 will be briefly described.
In the present embodiment, the position of the window glass 11 is detected by a ripple current.
FIG. 4 is a diagram showing a ripple current waveform of the motor 20 used for driving the window glass.
As shown in FIG. 4, a rotation pulse generated when the motor 20 rotates is called a ripple current, and this ripple current is detected by monitoring a current output from the motor 20.

The ripple current I _P waveform is generated by the change in the number of effective conductors, and the number of the chevron waveforms depends on the number of segments of the commutator.
As shown in FIG. 5, in the motor 20 according to the present embodiment, 10 chevron waveforms are generated every time one rotation (that is, displacement of 360 degrees).
That is, the rotational speed of the motor 20 can be grasped by detecting the waveform of the ripple current I _P.

Further, since the moving distance of the window glass 11 when the motor 20 makes one rotation can be easily calculated from the gear ratio or the like, the window glass 11 is counted by counting the mountain waveform of the ripple current I _P. It is possible to grasp the movement distance of
For this reason, the controller 31 receives the ripple current I _P output from the motor 20 via the line 16, counts the peak waveform of the ripple current I _P , and calculates the moving distance of the window glass 11. Can do.

Further, the controller 31 constantly monitors whether or not foreign objects are caught by the window glass 11 when the window glass 11 is closed (normally closed or automatically closed).
When the window glass 11 sandwich the foreign matter, since the driving current of the motor 20 is increased, the controller 31 in this embodiment, when the current value exceeds the predetermined threshold I ₁ which is set in advance Then, it is determined that the pinching has occurred, and the motor 20 is reversely driven for a certain time (or the window glass 11 by a certain distance).

In addition, when it determines with pinching, you may control so that the window glass 11 descend | falls, after stopping operation | movement of the motor 20 once and stopping the further closing operation | movement of the window glass 11 once.
In the present embodiment, when the upper end portion of the window glass 11 is in contact with the weather strip U also, the current value increases, exceeds the threshold value I _1.
Also in this case, the motor 20 is driven in reverse rotation for a certain period of time or the window glass 11 by a certain distance. This operation will be described in detail below.

Next, the pinching determination process of the controller 31 according to the present embodiment will be described with reference to FIGS.
First, the closing operation flow of the power window device 1 will be described with reference to FIG.
The controller 31 according to the present embodiment first determines whether or not the operation switch 4 has been operated to a closing operation (normal closing operation and automatic closing operation) (step S1).
If it is determined that the operation switch 4 has not been operated to the closing operation (normally closing operation or auto closing operation) (step S1: No), the process returns to the beginning.
When it is determined that the operation switch 4 has been operated to the closing operation (normally closing operation and auto closing operation) (step S1: Yes), the motor 20 is driven to rotate forward in step S2.

Then, in step S3, the driving current is determined whether the threshold value I ₁ or more.
In step S3, when the drive current value is determined not to be the threshold value I ₁ or more (step S3: No), it is determined that the no abnormality, continued forward rotation of the motor 20 in step S4, the processing Returns to step S3.

In step S3, when the drive current value is determined to be the threshold value I ₁ or more (step S3: Yes), it is determined that reaches the abnormality occurrence or Shimekiri position, the motor 20 reversely driven in step S5, the process Advances to step S6.
In step S6, the reverse rotation time of the motor 20 determines whether or not exceeded the predetermined time T _1.
The predetermined time T ₁ is monitored by a provided timer in the controller 31.

In step S6, if the driving time of the motor 20 is determined not to exceed a predetermined time T ₁ (step S6: No), and it continues the reverse rotation of the motor 20 in step S7, the process returns to the step S6.
In step S6, if the driving time of the motor 20 is determined to have exceeded the predetermined time _{T 1} (step S6: Yes), it stops the driving of the motor 20 in step S8, the process returns to the beginning.

In the present embodiment, at step S3, a situation where the drive current value is determined to be the threshold value I ₁ or more, the two patterns are conceivable.
One pattern is when foreign objects are caught during the closing operation of the window glass 11, and the other pattern is when the window glass 11 reaches the closed position, that is, the upper end of the window glass 11 is the weather strip. This is the case when it contacts U.

FIG. 7 shows a current value, a motor output, a sandwiching load, and a position of the window glass 11 when a foreign object is caught during the closing operation of the window glass 11.
As shown in FIG. 7, when the current value exceeds the threshold value I _1, the motor 20 is driven for a predetermined time T ₁ reversed. Thus, since the motor 20 is driven in reverse, the position of the window glass 11 is lowered. As the window glass 11 descends, the foreign matter is released, so that the sandwiching load becomes zero.

Similarly, in FIG. 8, when the window glass 11 reaches the closed position, that is, when the upper end portion of the window glass 11 contacts the weather strip U, the current value, the motor output, the sandwiching load, the position of the window glass 11. Indicates.
As shown in FIG. 8, if those Sessure the upper end portion weather strip U of the window glass 11, by this pressing force, the current value as in the case where the foreign matter is sandwiched exceeds the threshold I _1.
Thus, when the current value exceeds the threshold value I _1, the motor 20 is driven for a predetermined time T ₁ reversed.
However, the position of the window glass 11 at this time is slightly lower than the position of the fully closed state.

FIG. 9 is an explanatory diagram of the points X1 and X2 in FIG.
FIG. 9A is a view at the X1 point, that is, at a position where the upper end portion of the window glass 11 is in contact with the weather strip U.
In this position, the upper end portion of the window glass 11 is in a state of receiving a load due to the pressing force F received from the contact surface of the weather strip U.
In the present embodiment, (detects that the driving current value is the threshold value I ₁ or higher) detecting the arrival at the X1 point Then, the lower position the window glass 11 of the motor 20 driven in reverse to (X2 point ) To stop.

For this reason, even when the window glass 11 is fully closed, the window glass 11 is disposed at the point X2, and no extra load is applied to the upper end of the window glass 11. This prevents the motor 20 and the entire system from being applied with a load. be able to.
Further, since the size and the like of the weather strip U are known, the upper end portion of the window glass 11 can be stopped inside the weather strip U by adjusting the time (predetermined time T ₁ ) for driving the motor 20 in the reverse direction. . For this reason, waterproofness can also be guaranteed at the same time.

Next, another embodiment of the present invention will be described.
In addition, description is abbreviate | omitted regarding the structure similar to the said embodiment.
This embodiment is different from the above embodiment in that the reverse drive of the motor 20 is defined not by time but by the moving distance of the window glass 11.

First, the closing operation flow of the power window device 1 will be described with reference to FIG.
The controller 31 according to the present embodiment first determines whether or not the operation switch 4 has been operated to a closing operation (normal closing operation and auto closing operation) (step S11).
When it is determined that the operation switch 4 is not operated to the closing operation (normally closing operation and auto closing operation) (step S11: No), the processing returns to the first.
When it is determined that the operation switch 4 has been operated to the closing operation (normally closing operation and auto closing operation) (step S11: Yes), the motor 20 is driven to rotate forward in step S12.

Then, in step S13, the driving current is determined whether the threshold value I ₁ or more.
In step S13, when the drive current value is determined not to be the threshold value I ₁ or more (step S13: No), it is determined that the no abnormality, continued forward rotation of the motor 20 in step S14, the processing Returns to step S13.

In step S13, when the drive current value is determined to be the threshold value _{I 1} or more (step S13: Yes), it is determined that reaches the abnormality occurrence or Shimekiri position, the motor 20 reversely driven in step S15, the processing Advances to step S16.
In step S16, it is determined whether or not the window glass 11 has reached a predetermined reverse drive distance.

The reverse drive distance is calculated by the controller 31 from the ripple current I _P.
That is, since the moving distance of the window glass 11 when the motor 20 makes one rotation can be easily calculated from the gear ratio or the like, the window glass 11 is counted by counting the mountain waveform of the ripple current I _P. It is possible to grasp the movement distance of
For this reason, the controller 31 can receive the ripple current I _P output from the motor 20, count the mountain waveform of the ripple current I _P , and calculate the moving distance of the window glass 11. When this moving distance reaches a predetermined reverse driving distance, step S16 becomes affirmative.

If it is determined in step S16 that the reverse drive distance has not been reached (step S16: No), the reverse drive of the motor 20 is continued in step S17, and the process returns to step S16.
If it is determined in step S16 that the reverse drive distance has been reached (step S16: Yes), the drive of the motor 20 is stopped in step S18, and the process returns to the beginning.
Thus, the reverse drive of the motor 20 is stopped based on the moving distance of the window glass 11.
Other configurations are the same as in the above embodiment.

It is explanatory drawing of the power window apparatus which concerns on one Embodiment of this invention. It is an electrical block diagram of the power window apparatus of FIG. FIG. 2 is a circuit diagram of the drive circuit in FIG. 1. It is a current waveform diagram. FIG. 5 is a correlation diagram between a ripple current and an armature rotation angle according to an embodiment of the present invention. It is a flowchart which shows the closing operation | movement process of a window glass. FIG. 6 is a correlation diagram of current value, motor output, pinching load, and window glass position when pinching is detected. FIG. 6 is a correlation diagram of current value, motor output, pinching load, and window glass position when pinching is not detected. It is explanatory drawing which shows the window glass upper-end part position in the time of a fully closed state. It is a flowchart which shows the closing operation | movement process of a window glass.

Explanation of symbols

1. Power window device 2. Lifting mechanism 3. Control unit 4. Operation switch
5. Battery, 10. Door, 11. Window glass, 20. Motor,
21... Lifting arm, 21a... Gear, 22 .. Follower arm, 23.
24 ... Glass side channel, 25 ... Rotation detector, 31 ... Controller 32 ... Drive circuit U ... Weather strip, W ... Window frame

Claims (4)

An opening / closing member control device comprising: an opening / closing member; a motor that opens and closes the opening / closing member in a frame that surrounds the outer periphery of the opening / closing member and guides the opening / closing operation; and a control unit that controls the motor. And
The control unit includes a load detection unit that detects a load applied to the motor during opening and closing drive,
When the load applied to the motor becomes a predetermined amount or more, a rotation direction switching means for rotating the motor in the reverse direction is provided,
The rotation direction switching means is disposed on at least the upper side of the frame and is in the fully closed state of the opening / closing member when the load applied to the motor detected by the load detection means exceeds a predetermined amount. The motor is rotated in the reverse direction so that the opening / closing member descends within a range in which the sealing member covering at least the upper end of the opening / closing member can keep the upper end of the opening / closing member covered. An opening / closing member control device.   2. The opening / closing member control device according to claim 1, wherein the rotation direction switching unit rotates the motor in a reverse direction for a predetermined time from a point in time when a load applied to the motor becomes a predetermined amount or more.   The rotation direction switching means rotates the motor in the reverse direction from when the load applied to the motor becomes a predetermined amount or more until the opening / closing member descends a predetermined distance. Opening / closing member control device.   2. The opening / closing member control apparatus according to claim 1, wherein the opening / closing member and the sealing member are in contact with each other over the entire range of the sealing member when the opening / closing member is fully closed.

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