JPH07238738A - Drive controller of opening/closing body - Google Patents

Abstract

PURPOSE:To secure safety, by providing a monitoring position-detector and a preventive control means against catching by outputting a first detection signal on starting of closing operation of an opening/closing body, and once opening it by a specified catching-preventive width. CONSTITUTION:When a window-pane 2 is positioned within a monitoring range where a catching risk is expected, a first detection signal S1 is outputted from a monitoring position-detection means 34 at the starting time of rising motion of the window-pane 2 owing to the one-directional revolution of an electric motor 22. When the interval from stop of the closing motion of the glass 2 to the next start time of the closing motion is shorter than a specified stable time, a second detection signal S2 s outputted by a detector 35 for stopping time. Next, the motor 22 is controlled by a preventive control means 32 against catching on the basis of the signals S1, S2 to once reversely rotate the motor 22 and then rotate it to one direction. In this way, it hinders the pane from catching on closing the window-pane while one does not notice the state produced by the overrun of the pane immediately after the stop motion of closing the pane.

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 body, and more particularly, to a drive control device for an opening / closing body having a safety function of preventing foreign matter from being caught by the closing opening / closing body. It is a thing.

[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 is known. Rotating the motor in one direction raises the window glass, and rotating it in the other direction lowers the window glass.

Conventionally, such a control device simply rotates the motor in one direction to close the window glass while the raising operation switch is turned on, and when the raising operation switch is turned off. Some stop the rotation of the motor. Further, as another control device, when the window glass is rising, it monitors whether or not a human body or the like is mistakenly caught by the window glass. In some cases, the rotation of the motor is stopped to immediately stop the ascent so as to ensure safety. Such a device monitors the change in the drive current of the electric motor due to the increase in the sliding resistance when the window glass rises, and detects the drive current in order to detect the penetration of the human body. When exceeds a predetermined threshold value, it is determined that the human body or the like is caught, and the rotation of the motor in one direction is stopped.

[0004]

However, in the former one of the above-mentioned conventional control devices, immediately after the rotation of the motor in one direction is stopped, the inertia of the window glass and the design of the drive mechanism are reduced. The window glass slightly rises (overruns) due to play and then stops completely, so you can raise the window glass again without noticing the pinching that occurred during that overrun, resulting in a sudden strong pinch. There was a risk of happening.

On the other hand, in the latter control device, of course, after the rotation of the motor in one direction is stopped, the drive current of the motor cannot be monitored, and immediately after the rotation of the motor in one direction is stopped. During the overrun in which the window glass rises slightly, the jamming is not detected. Immediately after the motor starts rotating in one direction, that is, immediately after the window glass starts to rise, the drive current of the motor is unstable. Therefore, the pinching is not detected until it stabilizes. Therefore, for example, after a pinch occurs during overrun of the window glass immediately after the motor stops rotating in one direction, the motor immediately starts rotating in one direction without noticing the pinch. When the window glass is re-raised, the pinching force increases immediately after the re-elevation is started until the detection of the pinching is started, and a strong pinching may occur rapidly.

An object of the present invention is to consider a case where a pinch occurs during an overrun after the closing operation of the opening / closing body such as a window glass is stopped. It is an object of the present invention to provide a drive control device for an opening / closing body that can avoid the occurrence of accidents and can ensure high safety.

[0007]

A drive control device for an opening / closing body of the present invention is a drive control device for an open / close body for controlling a drive mechanism for opening and closing the open / close body, wherein the open / close body is in the vicinity of a closing limit position. And a monitoring position detecting means for outputting a first detection signal when positioned within a predetermined slip-in monitoring range, and the first detection signal is output when the opening / closing body starts to be closed by the drive mechanism. It is characterized in that it is provided with a pinching prevention control means for temporarily opening the opening / closing body by a predetermined pinching preventing amount.

[0008]

According to the drive control device for the opening / closing body of the present invention, at the start of the closing operation of the opening / closing body such as the window glass, the opening / closing body is within the predetermined range of the crawling, and only a predetermined amount is provided. By opening the opening / closing body once, if the opening / closing body is closed again without noticing the pinching that occurred during the overrun immediately after the closing operation of the opening / closing body was stopped, a strong collapse occurs suddenly. To prevent this and ensure high safety.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. This embodiment is an application example as a lifting device for lifting and lowering a window glass (opening / closing body) of a side door of an automobile to open and close.

FIG. 1 is a schematic side view of a side door 1 of an automobile equipped with a lifting device (drive control device for an opening / closing body) 10 of the present embodiment. The lifting device 10 is attached to a window glass 2. A drive mechanism 20 for raising and lowering the carrier 3 along the guide rail 4 is provided. Drive mechanism 20 of this example
Is configured such that the wire 21 connected to the carrier 3 is moved in the directions of arrows A ₁ and A _{2 by the} forward and reverse rotation of the electric motor (driving source) 22 to raise and lower the window glass 2 together with the carrier 3. The electric motor 22 has a pulse signal (motor pulse (Fig.
The rotation sensor 23 (see FIG. 2) that outputs (e) is provided. Further, inside the side door 1, there is provided a switch operating portion 24 for vertically moving the window glass 2. These electric motor 22 and rotation sensor 23
The switch operation unit 24 is connected to the control device 30.

In FIG. 2, reference numeral 31 indicates the motor 22 depending on the operating state of the operation switch 24 and the control signals from the jamming prevention control means 32 and the jamming detection unit A which will be described later.
Is a motor control means for driving and controlling the motor. The operation switch 24 includes an UP switch (see FIG. 4A) that is turned ON when the window glass 2 is raised and outputs an UP signal, and an ON switch that is turned ON when the window glass 2 is lowered to output a DOWN signal. Output DOWN switch (Fig. 4 (b))
(See) is provided. When the UP signal is output, the control means 31 turns the UP relay (not shown) ON to rotate the motor 22 in one direction, and when the DOWN signal is output, the DOWN relay (not shown) is turned ON to turn the motor 22 to another. Rotate in the direction. Further, the pinch prevention control means 32 controls the motor 22 via the motor control means 31 based on the signals S ₁ , S ₂ , S ₃ as described later.

A reference numeral 33 counts the pulse signals from the rotation sensor 23, so that the vertical position P of the window glass 2 is raised.
It is a position counter (position detecting means) for detecting. The position counter 33 sets the count value to “0” when the window glass 2 is at the rising limit position P ₀ (see FIG. 1), and outputs the pulse signal output from the rotation sensor 23 in accordance with the lowering of the window glass 2. Count up again, window glass 2
Counts down according to the rise of. Therefore, when the window glass 2 is at the lower limit position P _MAX (see FIG. 1),
The count value becomes maximum.

The window glass 2 is located within the monitoring range L between the positions P _{1 to} P _n, which are separated by a predetermined distance from each of the limit positions P ₀ and P _MAX of elevation, based on the count value of the position counter 33. Is a monitoring position detecting means for detecting whether or not the window glass 2 is located within the monitoring range L.
The first detection signal S ₁ is output when is positioned.
The monitoring range L is a range in which there is a risk of being caught.

35 is a timer T ₁ (see FIG. 4 (g))
As will be described later, the timer T ₁ is started when the UP switch of the operation switch 24 is turned OFF, and the OFF state of the UP switch continues for the first stable time t _{1 as} will be described later. When it does, the timer T ₁ times out. The second detection signal S ₂ (see FIG. 2) is output until the timer T ₁ times out. Reference numeral 36 is an opening time detecting means provided with a timer T ₂ (see FIG. 4 (f)), and as will be described later, when the DOWN relay is temporarily turned on and then turned off, the timer T ₂ is turned on. When the second stable time t ₂ has elapsed, the timer T ₂ times up and outputs the third detection signal S ₃ (see FIG. 2).

In the pinching detecting section A, 37 is a cycle calculating section (speed detecting section) for detecting the closing speed (raising speed) of the window glass 2 by calculating the output cycle of the pulse signal of the rotation sensor 23. Means). The pinching detection means 38 is a window glass within the monitoring range L (see FIG. 1) based on the rising speed (closing speed) of the window glass 2 detected by the calculation unit 37 and the count value of the counter 33. Detecting the presence or absence of the human body being caught during the ascent of 2. Various methods can be adopted as the detection method. The following examples can be given as the detection method.

First Pinch Detection Method A normal standard rising speed (comparison reference measure) corresponding to each position P of the window glass 2 is set, and each position P of the window glass 2 is set. The standard ascending speed is compared with the ascending speed detected by the calculation unit 37, and when the latter ascending speed is slower than the former ascending speed by a predetermined speed or more, it is determined that a jamming has occurred. Then, the detection signal S ₀ is output. Immediately after the window glass 2 starts to rise, the rising speed thereof is not stable, and therefore the pinching detection operation is not performed during the unstable period. The period during which the detection operation is not performed in this way 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 set as the detection operation period of the pinching. The standard rising speed is set in advance or is automatically learned and set based on the detection speed when the window glass 2 is actually lifted.

Second Crawling Detection Method A standard ascending rate change rate (comparison reference rate change rate) at a normal time corresponding to each position P of the window glass 2 is set in advance.
For each position P of the window glass 2, based on the standard rate of change of the ascending speed and the ascending speed at the ascending position at the present time detected by the calculation unit 37, the ascending speed at the ascending position at the next time is calculated. Predict and compare the predicted speed with the ascending speed detected at that time, and when the latter's ascending speed is slower than the former's ascending speed by a predetermined speed or more, it is determined that a slip-in has occurred. And outputs the detection signal S ₀ . Immediately after the window glass 2 starts to rise, the rising speed is not stable, and therefore 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 set as the detection operation period of the pinching.
The standard rate of change of the rising speed is set in advance or is automatically learned and set based on the detected speed when the window glass 2 is actually lifted.

Other Method for Detecting Entrapment The current flowing in the motor 22 is monitored, and when a large load is applied to the motor 22 and an overcurrent exceeding a predetermined value flows,
The detection signal S ₀ is output when it is determined that the pinching has occurred.
Since a relatively large starting current flows through the motor 22 at the time when the window glass 2 starts to rise, the pinching detection operation is not performed while the starting current flows (mask time t ₀ ). Further, the time when the window glass 2 is rising in the monitoring range L is set as the detection operation period of the pinching.

As described above, the pinching detection means 38
Outputs a detection signal S ₀ at the time of detecting the pinching. The motor control means 31 stops the rotation of the motor 22 when the detection signal S ₀ is output.

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

First, when the DOWN signal is output by the ON operation of the DOWN switch (see FIG. 4B) of the operation switch 24, the process proceeds from steps S1 and S2 to S3, and the motor control means 31 switches the motor 22 to another. And the window glass 2 is lowered (DOWN operation). UP
When the UP signal is output by the ON operation of the switch (see FIG. 4A), the process proceeds to step S4, and when the timer T ₁ is up, the motor control means 31 turns the UP relay ON. , Immediately window glass 2
The ascending operation (UP operation) is started (step S1)
4). As will be described later, the timer T ₁ is started when the rising operation of the window glass 2 is stopped last time, and then the window glass 2 is activated.
The time is up when the first stable time t ₁ elapses in the stopped state. The stabilization time t ₁ is set in consideration of the amount of overrun after the rising operation of the window glass 2 is stopped, and when this stabilization time t ₁ has elapsed after the rising operation of the window glass 2 was stopped, It is said that the elapsed time is such that there is no danger of immediately raising the window glass again without noticing the pinching that occurred during the overrun. on the other hand,
When the timer T ₁ has timed out and the window glass 2 is not located within the monitoring range L (steps S4, S
5), UP signal is no longer output (step S
6) or the condition that the window glass 2 is moved up to the lift limit position P ₀ (step S7), the UP relay is turned on.
The ascending operation is stopped as FF (step S8). Note that the mask time t ₀ is such that the window glass 2 is at the lower limit position P _MAX.
Is set to be longer than the rising time required to rise from the position to the position P _n . Therefore, step S8 is executed only when the window glass 2 is rising between the position P ₁ and the rising limit position P ₀ .

When the timer T ₁ has timed out and the window glass 2 is located within the monitoring range L (steps S4 and S5), the DOWN relay is turned on to start a temporary descending operation ( Step S9). Then, when the window glass 2 is lowered by the predetermined amount for preventing the pinching, the DOWN relay is turned off to temporarily stop the lowering operation (steps S10 and S11). The descending amount of the window glass 2 in that case is detected based on the count value of the position counter 33, and the pinching prevention amount is, for example, immediately after the rotation of the motor in one direction is stopped (immediately after the raising operation of the window glass 2 is stopped). Is set to an extent corresponding to the amount of overrun of the window glass in the ascending direction.

After that, the timer T ₂ is started (step S12), and after the elapse of the _second stable time t ₂ at which the timer T ₂ times out (step S13),
The UP relay is turned on to start the raising operation of the window glass 2 (step S14). The second stabilization time t ₂ is set in consideration of the overrun in the descending direction of the window glass 2 immediately after the temporary lowering operation is stopped in step S11. The waiting time is about to stop. By setting such a waiting time, when the window glass 2 is subsequently raised,
Avoid overloading the drive mechanism 20, especially the wires 21 (see FIG. 1).

After the window glass 2 is raised in step S14, the masking time t ₀ is waited for (step S15), and the pinching detecting means 38 detects the pinching as described above. (Step S16). The jamming detection operation is performed until the window glass 2 rises within the monitoring range L by a predetermined return amount (steps S17 and S1).
8), or while the UP signal is being output (step S19) even after the return amount is increased, when the pinching is detected during the continuation, as described above, the detection signal S ₀ is output and the rotation of the motor 22 is stopped.
The return amount of the window glass 2 that serves as the determination reference in step S18 is the return amount for raising the window glass 2 to the up / down position of the window glass 2 at the time when the temporary lowering operation is started in step S9 described above. And, for example, step S
It is set to a total amount of the amount of prevention of pinching in 10 and the amount of overrun after the descent operation is stopped in step S11. In addition, such a rising return amount is calculated by the position counter 3
It detects based on the count value of 3.

The window glass 2 is operated during the slip-in detection operation.
Is outside the monitoring range L, the process proceeds from step S17 to step S6 described above, and when the UP signal is no longer output, the UP relay is turned off to stop the ascending operation (step S20). The timer T ₁ is activated (step S21) and the process returns to step S1.

After all, at the start of the raising operation of the window glass 2,
(I) The window glass 2 is located within the monitoring range L (the first detection signal S ₁ is output), (II)
On condition that the first stabilization time t ₁ has not elapsed (the second detection signal S ₂ has been output), the window glass 2 is once lowered by the predetermined amount of prevention of pinching. . Therefore, after the lifting operation of the window glass 2 is stopped, the user does not notice the pinching during the overrun until the window glass 2 completely stops, and the window glass 2 is immediately lifted again to cause a strong Occurrence will be prevented.

It should be noted that the window glass 2 is provided under the condition of (I) only, not under the condition of the elapse of the first stabilization time t ₁ of (II).
The window glass may be lowered by a predetermined amount to prevent the pinching at the time of starting the raising operation of. Further, the pinching detection unit A does not necessarily have to be provided.

FIG. 5 shows the relationship between the closing movement position (raising position) and the closing movement speed (raising speed) of the window glass 2. In addition, FIGS. 6A and 6B show the window glass 2 at the time of the jamming prevention operation.
FIG. 7 is a diagram showing an example of changes in closing speed and closing load of FIG. That is, in this example, immediately after the raising operation of the window glass 2 stopped at the closed position P _A , the tucking of the human body or the like was detected shortly before it was detected, and then the window glass 2 overran. Completely stop at position P _B , then window glass 2
When the ascending operation is resumed, the window glass 2 as shown by the dotted line in FIG.
To the position P _{A and} then back to the window glass 2
This is an example of the case where the ascending operation of No. 2 is restarted, and by the window glass 2 being returned to the position P _A , it is possible to avoid a sudden strong pinching. Further, when the window glass 2 is closed from its position P _A without releasing the pinching, as shown in FIG.
Is gradually returned from the position P _B to P _A , the load gradually rises, and when the mask time t ₀ has passed, the pinching is immediately detected at the time of the closing position P _C , and the closing load is relatively high. The closing motion will stop at a small time point, that is, at a time point when the user does not squeeze strongly.

FIGS. 7 (a) and 7 (b) show a conventional example in which the trapping prevention operation is not performed. That is, the closed position P
Immediately after the lifting operation of the window glass 2 is stopped at _A ′, the crawling of the human body or the like occurs shortly before it is detected,
Then, the window glass 2 overruns to the position P _B ′ and then completely stops, and thereafter, the window glass 2 is moved up again from the position P _B ′ without noticing the pinching. . In this way, when the window glass 2 is closed again from the position P _B ′ without releasing the pinching, the pinching is detected at the closing position P _C ′ after the mask time t ₀ has elapsed. The closing motion will stop when the closing load becomes relatively large, that is, when a strong pinch occurs suddenly.

[0030]

As described above, according to the drive control device for an opening / closing body of the present invention, the opening / closing body is within a predetermined range of monitoring for catching at the start of the closing operation of the opening / closing body such as a window glass. The condition is that the opening / closing body is once opened by a predetermined amount, so when the opening / closing body is closed again without noticing the pinching that occurred during the overrun immediately after the closing operation of the opening / closing body was stopped. In addition, it is possible to prevent a strong pinch from occurring suddenly and ensure high safety.

[Brief description of drawings]

FIG. 1 is a schematic side view of a vehicle door including an embodiment of the present invention.

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

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

FIG. 4 is a time chart for explaining an operation timing of the control device shown in FIG.

5 is an explanatory view of a relationship between a closing position and a closing speed of the window glass shown in FIG.

6 is an operation characteristic diagram for explaining an example of a trapping prevention operation by the control device shown in FIG.

FIG. 7 is an operation characteristic diagram for explaining an example of a trapping prevention operation by a conventional control device.

[Explanation of symbols]

10 Lifting Device (Drive Control Device for Opening / Closing Body) 20 Drive Mechanism 22 Electric Motor 30 Control Device 32 Entrapment Prevention Control Means 34 Monitoring Position Detecting Means 35 Stop Time Detecting Means 36 Opening Time Detecting Means S ₁ First Detection Signal S ₂ Second detection signal S ₃ Third detection signal

Claims (2)

[Claims] 1. A drive control device for an opening / closing body for controlling a drive mechanism for opening and closing the opening / closing body, wherein the opening / closing body is located within a predetermined crawling monitoring range including the vicinity of a closing limit position. A monitoring position detecting means for outputting a first detection signal; and a predetermined gripping of the opening / closing body on condition that the first detection signal is output when the opening / closing body starts to be closed by the drive mechanism. A drive control device for an opening / closing body, comprising: a trapping prevention control means for temporarily opening an amount corresponding to a jamming prevention amount. 2. A stop time for outputting a second detection signal when the time from the closing stop time of the opening / closing body by the drive mechanism to the next closing start time is shorter than a predetermined first stable time. A detection means, and the pinching prevention control means sets the opening / closing body to a predetermined condition on condition that the first and second detection signals are output at the time of starting the closing movement of the opening / closing body by the drive mechanism. 2. The drive control device for an opening / closing body according to claim 1, wherein the opening / closing body is temporarily opened by an amount to prevent the pinching.