JP2736009B2 - Opening / closing body drive control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive control device for an opening / closing member, and more particularly to a drive control device for a switching member having a safety function for preventing foreign matter from being caught by the closing member. Things.

[0002]

2. Description of the Related Art As a drive control device of this type, for example, a control device for controlling a drive mechanism for raising and lowering a window glass (opening / closing body) of an automobile by a driving force of an electric motor in order to open and close the window glass is known. By rotating the motor in one direction, the windowpane is raised, and by rotating it in the other direction, the windowpane is lowered.

Conventionally, this type of control device monitors whether or not a human body or the like is erroneously pinched by the window glass while the window glass is being raised. There is an apparatus in which the rotation of a motor is stopped to immediately stop the rising of a window glass to ensure safety. Such a device monitors, for example, the drive current of an electric motor as a closing dynamic resistance related amount that changes according to the closing dynamic resistance when the window glass rises, in order to detect the entrapment of a human body or the like. When the drive current exceeds a predetermined threshold value, it is determined that a human body or the like has been pinched, and the motor is stopped in one direction.

[0004]

By the way, in the conventional control device as described above, after the rotation of the motor in one direction is stopped, the driving current of the motor cannot be monitored naturally. During the overrun in which the window glass slightly rises immediately after the rotation in one direction is stopped, no entrapment is detected. Immediately after the motor starts to rotate in one direction, that is, immediately after the window glass starts to rise, the driving current of the motor is unstable.

Therefore, for example, after a pinch occurs during the overrun of the window glass immediately after the one-way rotation of the motor is stopped, the motor immediately starts rotating in one direction without noticing the pinch. When the window glass is raised again, the pinching force is rapidly increased immediately after the start of the re-raising and before the detection of the pinch is started, which may cause a dangerous state.

[0006] However, the above conventional control device simply sets the drive current of the motor to a predetermined fixed threshold value when the jamming is detected, regardless of whether or not such a dangerous state exists. Only the comparison is made, and even in such a dangerous state, the detection sensitivity of the entrapment is the same as the normal case. For this reason, there is a possibility that the detection of the entrapment in such a dangerous state may be delayed and safety may not be ensured.

SUMMARY OF THE INVENTION An object of the present invention is to detect, with high sensitivity, a dangerous trap which may occur when the closing operation of a window glass is restarted immediately after the closing operation of an opening / closing body such as a window glass is stopped. An object of the present invention is to provide an opening / closing body drive control device that can ensure high safety.

[0008]

According to the present invention, there is provided a drive control device for an opening / closing body which controls a driving mechanism for opening and closing the opening / closing body. Detecting means for detecting a closing movement resistance related amount that changes according to the closing movement resistance of the opening / closing body; and the driving mechanism when the closing movement resistance related amount detected by the detecting means exceeds a predetermined threshold value. And a pinch detecting means for stopping the closing movement of the opening / closing body, and a closing movement stop time from the time when the closing movement of the opening / closing body is stopped by the driving mechanism, and the measured time is a predetermined first reference time. A first time measurement means for outputting a first detection signal until the first detection signal is output, and the first detection signal is output when the driving mechanism starts to close the opening / closing body, on condition that the first detection signal is output. The threshold value of the detection Characterized by comprising a threshold value setting changing means for changing only small.

[0009]

According to the opening / closing body drive control device of the present invention, when the closing operation of the opening / closing body such as a window glass is stopped immediately after the closing operation is resumed, the entrapment detecting means temporarily detects the entrapment. By lowering the threshold value of the closing dynamic resistance related amount for the detection and raising the detection sensitivity, the closing operation is restarted without noticing the pinching that occurred during the overrun of the opening and closing body immediately after the closing operation was stopped. In such a case, dangerous trapping is detected with high sensitivity to ensure high safety.

[0010]

An embodiment of the present invention will be described below with reference to the drawings. The present embodiment is an example of application as an elevating device for elevating and lowering a window glass (opening / closing body) of a side door of an automobile.

FIG. 1 is a schematic side view of a side door 1 of an automobile provided with a lift device (opening / closing body drive control device) 10 according to the present embodiment. The lift device 10 is attached to a window glass 2. A drive mechanism 20 for moving the carrier 3 up and down along the guide rail 4 is provided. Drive mechanism 20 of this example
Is configured such that the window glass 2 moves up and down together with the carrier 3 by moving the wire 21 connected to the carrier 3 in the directions of arrows A ₁ and A _{2 by} forward and reverse rotation of the electric motor (drive source) 22. The electric motor 22 has a rotation sensor 23 that outputs a pulse signal corresponding to the number of rotations.
(See FIG. 2). In addition, a switch operation unit 24 for raising and lowering the window glass 2 is provided inside the side door 1. These electric motors 22,
The rotation sensor 23 and the switch operation unit 24 are connected to the control device 30.

In FIG. 2, reference numeral 31 denotes a motor control means for controlling the driving of the motor 22 in accordance with the operation state of the operation switch 24 and the output signal of the pinch detection means 34 described later. The operation switch 24 is turned ON when raising the window glass 2 and outputs an UP signal.
A P switch (see FIG. 4A) and a DO which is turned ON when the window glass 2 is lowered to output a DOWN signal
A WN switch is provided. The control means 31
Turns on the UP relay (not shown) when a signal is output
When the DOWN signal is output, the DOWN relay (not shown) is turned ON to rotate the motor 22 in the other direction. Reference numeral 32 denotes a position counter (position detecting means) for detecting the elevation position P of the window glass 2 by counting pulse signals from the rotation sensor 23. This position counter 32
Sets the count value to “0” when the window glass 2 is at the upper limit position P ₀ (see FIG. 1), counts up the pulse signal output from the rotation sensor 23 in response to the lowering of the window glass 2, Further, the countdown is performed in accordance with the rise of the window glass 2. Therefore, the window glass 2 is moved to the lower limit position P _MAX
(See FIG. 1), the count value becomes maximum.

Reference numeral 33 denotes a period calculating unit (speed detecting means) for detecting the closing movement speed (up speed) of the window glass 2 by calculating the output period of the pulse signal of the rotation sensor 23. The entrapment detecting means 34 detects the monitoring range L based on the rising speed (closing speed) of the window glass 2 detected by the calculating section 33 and the count value of the counter 32.
It is detected whether or not a human body or the like is pinched while the window glass 2 is being lifted in the window glass 2 (see FIG. 1). Therefore, the pinch detecting means 34 and a threshold setting speed means 35 described later
Is provided with a detection unit for the monitoring range L. That is,
Their detection section, based on the count value of the position counter 32, the lifting of the limit position P _0, P position apart from each by a predetermined distance _MAX P ₁ to P _n between the monitoring range window glass 2 into the L Is detected whether or not is located. The monitoring range L is a range in which pinching may occur.

Various methods can be adopted as a method of detecting the pinch by the pinch detecting means 34. The following example can be given as the detection method.

First entrapment detection method The standard rising speed (comparison reference measure) corresponding to each position P of the window glass 2 is set as a threshold value, and the position of the window glass 2 is set. For each P, the threshold value is compared with the ascending speed detected by the arithmetic unit 33, and when the detected ascending speed becomes slower than the threshold value, it is determined that pinching has occurred. and outputs a detection signal S ₀ Te. Immediately after the window glass 2 starts to rise, the rising speed is not stable, so that the pinch detecting operation is not performed during the unstable period. Such a period during which the detection operation is not performed is hereinafter referred to as “mask time t ₀ ”. Further, the time when the window glass 2 is rising in the monitoring range L is defined as a detection operation period of the entrapment.
The rising speed as the threshold value is set in advance or automatically learned and set based on the detected speed when the window glass 2 is actually raised.

However, the rising speed as the threshold value is changed by the threshold value setting changing means 35 described later, and the detection sensitivity of the entrapment increases by lowering the threshold value.

Second Entrapment Detection Method A standard rising speed change rate (comparison reference speed change rate) corresponding to each position P of the window glass 2 at normal time is set as a threshold value, and the window is detected. For each position P of the glass 2, a rising speed at the next rising position is predicted based on the threshold value and the rising speed at the current rising position detected by the calculation unit 33, and the prediction is performed. The speed is compared with the rising speed detected at that time, and when the latter rising speed is lower than the former rising speed by a predetermined speed or more, it is determined that pinching has occurred and the detection signal S ₀ is detected. Is output. Immediately after the window glass 2 starts to rise, the rising speed is not stable, so that the pinching detection operation is not performed during the unstable period (mask time t ₀ ). Further, the time when the window glass 2 is rising in the monitoring range L is defined as a detection operation period of the entrapment.
The rate of change of the rising speed as the threshold is set in advance,
Alternatively, it is automatically learned and set based on the detection speed when the window glass 2 is actually raised.

However, the rate of change of the rising speed as the threshold value is changed by the threshold value setting change means 35 described later, and the detection sensitivity of the entrapment increases by lowering the threshold value.

Other Entrapment Detection Method The current flowing through the motor 22 is monitored, and it is determined that the entrapment has occurred when a large load is applied to the motor 22 and an overcurrent exceeding a predetermined threshold flows. and outputs a detection signal S ₀ and. At the time when the window glass 2 starts to rise, a relatively large starting current flows through the motor 22, so that the entrapment detecting operation is not performed while the starting current flows (mask time t ₀ ). When the window glass 2 is rising in the monitoring range L, the pinching detection operation period is set. However, the current value as the threshold value is determined by a threshold setting change unit 35 described later.
The threshold value is lowered, and the detection sensitivity of the pinch is increased.

As described above, the pinch detecting means 34
Outputs the detection signal S ₀ at the time of detection of the narrowing sandwiched. Motor control means 31, when the detection signal S ₀ is output to stop the rotation of the motor 22.

Reference numeral 36 denotes a timer T ₁ (see FIG. 4B).
It is a first time measuring means provided with, as described later,
UP switch of the operation switch 24 (see FIG. 4 (a)) starts the timer T ₁ is when the turned OFF from ON,
When the OFF state of the UP switch is the first reference time t ₁ continues, the timer T ₁ is the time is up. Then, the second detection signal S ₁ (see FIG. 2) is output until the timer T ₁ times out. Reference numeral 37 denotes a second time measuring means provided with a timer T ₂ (see FIG. 5C). As will be described later, the timer T ₂ is turned on when the UP switch of the operation switch 24 is turned on from OFF. When the timer is activated and the second reference time t ₂ has elapsed thereafter, the timer T ₂ times out and the second detection signal S ₂ (FIG. 2)
Output).

The threshold value setting change means 35 changes the threshold value of the pinch detection means 35 based on these detection signals S ₁ and S ₂ as described later. The threshold value differs depending on the method of detecting the entrapment as described above.

Next, the operation will be described (FIGS. 3 and 4).
reference).

First, when a DOWN signal is output by the ON operation of the DOWN switch of the operation switch 24, the process proceeds from steps S1 and S2 to S3, in which the motor control means 31 rotates the motor 22 in the other direction, and 2
Is lowered (DOWN operation). On the other hand, when the UP signal is output by the UP switch ON operation (see FIG. 4 (a)) starts the timer T ₂ of the measuring means 36 (step S4), and motor control means 31 as ON the UP relay Then, the raising operation (UP operation) of the window glass 2 is started (step S5).

When the timer T ₁ has expired, the threshold value setting changing means 35 sets the threshold value S of the pinch detecting means 34 to an initial value S ₀ (step S _0).
6, S7), whereas, when the timer T ₁ is not timed up, lowering the value of the threshold S by a predetermined value [Delta] S (step S6, S8).

Thereafter, if the mask time t ₀ has elapsed (step S9) and the window glass 2 is located within the monitoring range L for the pinching (step S10), the pinching detecting means 34 Performs the pinch detection operation as described above (step S14). On the other hand, when the window glass 2 is not located within the monitoring range L, and the UP signal is not output (step S11), and or the window glass 2 is raised to the raised limit position P ₀ (step S12)
Under the condition, the UP relay is turned off to stop the ascending operation (step S13). Note that the mask time t ₀ is
The rising time required for the window glass 2 to rise from the lower limit position _PMAX to the position _Pn is set longer. Therefore, step S11, only be executed when the window glass 2 is raised between positions P ₁ and the ascent limit position P _0.

Detection operation of pinching (step S14)
It is, while the output of the UP signal continues to proceed (step S15, S18), in the meantime, when the timer T ₂ has timed returns the threshold S to the initial value S ₀ (step S18, S19). Further, when the narrowing sandwiched during the detection operation of narrowing sandwiched is detected, is output the detection signal S ₀ as described above, rotation of the motor 22 is stopped.

If the UP switch (see FIG. 4A) is turned off during the detection operation of the entrapment and the UP signal is no longer output, the UP relay is turned off to stop the ascending operation. (Step S16), Timer T
₁ is started (step S17), and the process returns to step S1.

After all, after the lifting operation of the window glass 2 is stopped, until the raising operation is started again, that is, from the OFF operation to the ON operation when the UP switch is repeatedly operated, the first reference time is set. when the timer T ₁ and t ₁ has passed is timed up, the threshold S of the detection means 34 narrowing sandwiched is maintained at the initial value S _0, detects the narrowing sandwiched with a normal sensitivity . On the other hand, UP switch is repeatedly operated at short intervals, when the timer T ₁ is not time-up, as shown in FIG. 4, lower the threshold S only [Delta] S, increasing the detection sensitivity of the narrowing sandwiched. Also, when the situation in which the timer T ₁ is not time-up is continuously occur, each time, is lowered by ΔS threshold S as shown in FIG. 5, it is increased detection sensitivity. Also, when the UP switch has passed the second reference time t ₂ from being turned ON, the return to the initial value S ₀ of the threshold S as shown in FIG. 5, the normal detection sensitivity.

Therefore, taking into account the overrun of the window glass 2 immediately after the rotation of the motor in one direction is stopped and the mask time t ₀ for detecting no entrapment, the reference time t ₁ ,
By setting t ₂ , the initial value S ₀ , and the variation ΔS, a dangerous pinch that may occur when the UP switch is repeatedly operated at short intervals, that is, during the overrun of the window glass 2, In order to enhance the safety by detecting a dangerous entrapment when the windowpane 2 is raised again immediately after the lifting operation of the windowpane 2 is stopped without noticing the entrapment that has occurred, to enhance safety. Become. Also, the first
Reference time _{t 1} of set longer than the mask time _{t 0 (t 1> t 0} ).

FIG. 6 shows the relationship between the closing position (up position) of the window glass 2 and the closing speed (up speed). FIG.
Is cause narrowing sandwiched at time P ₁₁ immediately after the UP switch is OFF operated, then, an example in which the UP switch ON operation at a first reference time t ₁ has elapsed before the time point P ₁₂ shown, between time points P ₁₂ to the second reference time t ₂ has elapsed, the detection sensitivity of the narrowing sandwiched are threshold S is the (S ₀ -ΔS) increases.

[0032]

As described above, the opening / closing body drive control apparatus according to the present invention temporarily stops the closing operation of the opening / closing body such as a window glass when the closing operation is immediately resumed. Since the detection sensitivity is increased by lowering the threshold value of the closing dynamic resistance related amount for detection of entrapment in the entrapment detection means, the entrapment generated during the overrun of the opening / closing member immediately after the closing operation is stopped. , The dangerous entrapment when the closing operation is restarted is detected with high sensitivity, and high security can be secured.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a vehicle door provided with one embodiment of the present invention.

FIG. 2 is a block diagram of the control device shown in FIG. 1;

FIG. 3 is a flowchart for explaining a control procedure of the control device shown in FIG. 1;

FIG. 4 is a time chart for explaining an example of the operation of the threshold value setting changing means shown in FIG. 2;

FIG. 5 is a time chart for explaining another example of the operation of the threshold value setting changing means shown in FIG. 2;

6 is an explanatory diagram of a relationship between a closing movement position and a closing movement speed of the window glass shown in FIG. 1;

FIG. 7 is an explanatory diagram of a relationship between a closing position and a closing speed of the window glass in a case where a pinch occurs due to an overrun of the window glass shown in FIG. 1;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Elevating device (driving control device of opening / closing body) 20 Drive mechanism 22 Electric motor 30 Control device 32 Position counter (Position detecting means) 33 Period calculating section (Speed detecting means) 34 Entrapment detecting means 35 Threshold value setting changing means 36 first time measuring means 37 second time measuring means S ₁ first detection signal S ₂ second detection signal

Claims (3)

(57) [Claims] An opening / closing body drive control device for controlling a driving mechanism for opening and closing the opening / closing body, wherein the closing movement resistance changes according to the closing movement resistance of the opening / closing body during the closing movement of the opening / closing body. Detecting means for detecting a related amount; and pinching detecting means for stopping the closing movement of the opening / closing body by the driving mechanism when a closing motion resistance related amount detected by the detecting means exceeds a predetermined threshold value. A first time for measuring a closing stop time of the opening / closing body from the time when the driving mechanism stops the closing movement, and outputting a first detection signal until the measured time exceeds a predetermined first reference time; Measuring means; and when the drive mechanism starts closing the opening / closing body, temporarily reduces a threshold value of the entrapment detection means by a predetermined amount on condition that the first detection signal is output. The threshold setting change means to be changed Opening and closing member of the drive control apparatus characterized by was e. 2. A closing movement continuation time from a start time of the closing movement of the opening / closing body by the driving mechanism is measured, and a second detection signal is output when the measured time exceeds a predetermined second reference time. A second time measuring means for resetting the threshold value of the pinch detecting means to a value before the change when the second detection signal is output. The drive control device for an opening / closing body according to claim 1, wherein: 3. The method according to claim 1, wherein the detecting means detects, as the closing movement resistance related amount, either a closing movement speed of the opening / closing body or a drive current of an electric motor for closing the opening / closing body. The drive control device for an opening / closing body according to claim 1 or 2, wherein: