JPS5923727A - Safety device for sun roof of automobile - Google Patents

Abstract

PURPOSE:To securely stop a sun roof under abnormal load, by stopping a motor depending on the output of either a means for changing a set overcurrent level in response to the position of the sun roof and then storing the level and a means for performing the delayed output of the level. CONSTITUTION:The load upon a motor 11 is measured by a resistor 40. An overcurrent level is set by an addition circuit 80. The set overcurrent level is stored into a memory circuit 110, which detects the position of a sun roof through a limit switch 22. The set overcurrent level is also applied to an overload detection circuit 100 through a delay circuit 90. The motor 11 is stopped by a motor stop circuit 120. Though the load upon the sun roof differs as to its position, the sun roof is securely stopped under overload because the overcurrent level is modified depending on the position of the sun roof and the delay circuit 90 is provided further.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a safety device for an automobile roof, and in particular to a safety device for an automobile roof.
This invention relates to overload prevention of drive sources in positioning the electric mechanisms that drive them.

Conventional electric drive roofs for automobiles use thermocouples, electronic devices, etc. to set the overcurrent value in advance.
Some systems cut off the circuit and stop the drive device when the overcurrent of the drive device exceeds the set overcurrent value when a foreign object such as a part of the body gets caught in the slide panel while the runroof is in operation.

However, in the entire operation process of the slide panel, the drive load differs greatly in the membrane operating section, the section that presses the deflector arm, and the section that requires sealing force across the link. The operating current changes.

Therefore, in the overcurrent detection method for a single set overcurrent value as described above, the set overcurrent #f value must be set for the maximum operating current, and depending on the position where the body is bitten, the Because the load was too low to reach the set overcurrent value, it was determined that the device was operating normally, which could result in injury.

The object of the present invention is to provide a set overcurrent value that is stored and a set overcurrent value that is always set according to the load of the electric motor.

Two set values are provided to prevent abnormal loads from acting on the slide panel, stopping or reversing the driving device.
The purpose is to prevent overloading of the drive device, restraint damage to the drive mechanism, and injury to the human body.

In order to achieve the above object, the present invention includes a signal generation means for generating a signal by mechanical motion in the electric drive mechanism, a means for detecting the load of the electric motor, and a means for detecting an overcurrent in accordance with the load of the electric motor. means for setting a value; storage means for storing the set overcurrent value and changing the stored value based on a signal from the signal generating means; delay means for delaying and outputting the set overcurrent value; The load of the electric motor is compared with the output of the storage means and the output of the delay means, and if the former exceeds the output value of at least one of the latter, it is determined that the motor is overloaded (mechanical failure, object or human body is stuck). The gist of the configuration is that it is equipped with an electronic control device that stops the energization of the motor.

With the above configuration, the present invention detects overload in the following manner. First, the current value output by the storage means is changed to the value stored at the time of motor startup based on a signal from the signal generation means.

However, with this storage means, if the load fluctuation of the mechanism itself is large during normal times, the stored value must be set to a current value that will not operate even at the maximum value of the load fluctuation, and it is necessary to set the stored value to a current value that will not operate even at the maximum value of the load fluctuation. In a heavy load system, the sensitivity is extremely low within the operating range.

Therefore, to overcome this drawback, the current value is set by a delay means, and the overcurrent value is always set in accordance with the motor load fluctuation. Therefore, even in systems where the load fluctuates or the load decreases, the current value is followed, so the same sensitivity can always be maintained. However, this delay means has a drawback in that it cannot detect overloads no matter how heavy the load becomes when it becomes heavier than the time constant of the delay.The storage means covers this problem.

As described above, in the present invention, two of the storage means and the delay means are used.
By using these two methods in combination, overload can be detected at a constant level with high sensitivity, and the initial objective can be achieved.

In addition, in the present invention, since the set overcurrent value can always be set based on the motor's operating current value, the motor current due to variations in the characteristics of the motor itself, variations in the load of the electric drive mechanism, or changes over time in these This has the effect of not being affected by variations in

Note that when the electric drive mechanism is stopped and started, the motor current is significantly larger when the motor is started at a certain point than when the electric drive mechanism passes through a certain point at a steady speed. Therefore, in order to prevent this from being detected as an overload, in a preferred embodiment of the present invention, the above-mentioned overload detection is not performed for a predetermined period of time from when the motor is started until the motor reaches a steady speed. Similarly, the storage means does not store information immediately after the motor is started.

Among the causes of overload on the electric drive mechanism, the most likely cause is a person or cargo getting stuck on the driven body, but
When the motor is thereby stopped, in order to remove the jamb, it is preferable to drive the motor in the opposite direction to the direction of rotation of the motor immediately before stopping. Therefore, in a preferred embodiment of the present invention, when an overload is detected and the motor is stopped, the motor is energized to rotate in a direction opposite to the motor rotation direction immediately before stopping, and then the motor is stopped.

It is preferable to use a limit switch as the signal generating means because of its simple structure, but a reed switch 1 potentiometer, a linear switch, or a photoswitch may also be used.

First, the load on the mechanism, that is, the load on the motor, is detected by a resistor inserted in the energizing current loop of the electric motor.

The present invention will be explained in detail below.

Fig. m1 shows the installed appearance of the slide panel l of a one-door roof for automobiles, Fig. 2 shows a cross-sectional view taken along the line T in Fig. 1, and Figs. A sectional view taken along line 111 is shown.

An opening 8 is formed in the automobile roof 2, and the slide panel 1 opens and closes this opening 8. Along the opening 3 (along the longitudinal direction of the vehicle), on both sides of the opening 8, a slide panel 1 is pivotally connected via a link 61162 to a shoe 51 that is slidable along the guide rail scratch.

Cables 71 and 72 are fixed to the shoe 51, and a toothed couple 81182 is connected thereto. The toothed cables 8 and t82 are connected to the reducer 9 and meshed with the gear 10. A rotating shaft of a DC motor 11 is coupled to an input shaft of the reducer 9 . When the motor 11 rotates forward, the gear 1 ( ) drives the toothed cable 81 and ~ in the direction in which the nozzle 1 is opened, and when the motor 11 rotates in the reverse direction, it drives the gear 1 in the direction in which the panel 1 is closed. A baffle plate 13 supported by an arm 1211122 is pivotally attached to the front part of the opening 3 so as to be able to stand upside down. A clockwise rotational force is applied to the arms 121 and 122 by a plate (not shown).

As shown in FIG. 8, when the panel l is fully opened, the arms 121 and 122 receive the force of the plate spring, and the wind regulating plate 1
3 is standing up. In this state, when the motor 11 is driven in reverse rotation, the panel 1 moves forward, and after traveling a predetermined distance A, its tip contacts the tops of A-1, 121, and 122 as shown at +rjA. When the panel 1 moves further forward from this state, the tip of the panel l lowers the arm 1 and ■22, and accordingly the air regulating plate 18 rotates clockwise, and the tip of the panel 1 climbs over the air regulating plate 13. Finally, the opening 8 is completely closed as shown in FIG.

Next, an enlarged plan view of the reducer 9 is shown in FIG.
A sectional view taken along the line I is shown in FIG.

The reducer 9 includes a worm 141. which is fixed to the rotating shaft of the motor 11. Worm wheel 141K intertwined with each other and pivoted to the rotating shaft 15, worm wheel gear 14291, wheel 14
2 with disc spring 16. A large-diameter gear 144 . which meshes with the gear IA introduced through a friction flange 162 and fixed to the rotating shaft 15 and the gear 143 . A gear ■45 that meshes with the gear 144 and is fixed to the rotating shaft 18. and a gear 10 fixed to the rotating shaft 18 and mated to the toothed cable 811.82.
The gear train is composed of, etc.

As shown in FIG. 8, an eccentric bearing 19 having an eccentric circumferential surface 198 is fitted to the tip of the rotating shaft 15, and a cam 2o is pivotally attached to this circumferential surface 19a. . A planetary gear 200 is pivotally mounted on the eccentric bearing 19. The planetary gear 200 meshes with the housing inner teeth 210, and a pin 21 is formed in the planetary gear 200. Further, a cam 20 is pivotally attached to the leading end of the rotating shaft 15. A through groove is formed in the cam 20, and the bottle 21 is engaged with this groove.

As a result, the bearing 19 rotates as the rotating shaft 150 rotates, the planetary gear 200 meshes with the housing inner teeth 21O and rotates differentially, the bin 21 moves, and the cam 20 is pushed by the bin 21. Rotate.

On the circumferential surface of the cam 20, two 6e Oa and 20b are formed on the upper and lower sides, and limit switches 22 and 23 are formed.
are arranged to face the grooves 2Qa and 2(lbK), respectively.As shown in FIGS. 9, 1.0 and 11, the cam 20
The operation of limit switches 22 and 23 will now be explained. Here, FIG. 9, FIG. 10, and FIG. 11 correspond to FIG. 8, FIG. 4, and FIG. 5, respectively.

When panel 1 is in the fully closed position (Figures 8 and 9),
Both limit switches 22.2B are pushed by the cam 20, and the limit switches 22 close 1. Limit switch 28 is open.

At this time, when the motor 11 is driven in the panel l closing direction,
The cam 20 rotates in the direction shown, and the panel 1 is connected to the arm 12.
1.122 (FIGS. 48 and 10), the bunschrond of the limit switch 22 fits into the groove 20a, and the limit switch 22 opens. When the motor 11 is further driven, the panel 1 moves toward the fully closed position (FIG. 5), but just before reaching the fully closed position, the limit switch 28
The bunschrond fits into the groove 2()b and becomes closed (Fig. 11). Therefore, the limit switch 22 is always idle and is open only while it is fitted into the groove 20a, and the limit switch 28 is closed. It is always open and closed only while it is fitted into the groove 20b.

Note that when the cable 81 or ~ is stopped and restrained by a force exceeding a certain level, the friction clutch 162 slips, and the gear 142 is rotationally driven by the motor 11, but the shaft 15 and the gear 143 fixed to the shaft do not rotate. do not. That is, the clutch 162 is provided as one mechanical safety mechanism.

Figure 12 shows the forward and reverse drive control of the motor 11 (panel l).
This shows an electric circuit that performs opening/closing positioning control.

One end of the motor 111 is connected to the power supply voltage Vn or chassis ground via the relay 31 of the motor drive circuit 3o, and the other end is connected to the power supply voltage Vs or chassis ground via the resistor 4. 82 are the relay driver 33 and relay driver; 3
4, it is energized and energized. This motor drive circuit 8o constitutes an electric driver, and the resistor 4o constitutes means for detecting the load on the electric motor 11.

When the idle switch 5o for Vunru 7 is switched to the open side, the relay driver 83 is energized and the m source power is 11 fV.
n -' IJ Ray-31-% -Ta l-Resistance 4゜-IJ Ray-82-Ground The current flows through the motor 11
Turn around.

In addition, when the switch is switched to the 1 closed side, the relay driver 34 is energized and the power supply voltage Vn - + Rule - 32 - Resistor 40 -
Current flows through the path of motor 11, relay 31, and ground, causing the motor 11 to rotate in reverse. At this time, the load signal of the motor 1 is taken out from one end of the resistor 40 and is input to the amplifier 70 via the filter circuit 60. Is the output v8 of this amplifier 70 overcharged? Addition circuit 80, which is a means for setting the M value
is input.

The adder circuit 80 has two
It has two circuits and is configured as follows.

First, for the delay circuit, the inverting input terminal ←) of the operational amplifier 8■ is connected to the chassis ground and the output terminal via resistors 82 and 82, respectively, and the non-inverting input terminal (G) is connected to the chassis ground and the output terminal, respectively.
Increase +1! The voltage that is obtained by dividing the constant power supply voltage Vc by the output V8 of the M unit 70 and the resistor 84°85 or the resistor 83.83, respectively.
is entered via. Therefore, the set voltage VD (corresponding to the set overcurrent value) for the delay circuit is % VD - V8 + V1
becomes. Furthermore, the adder for the memory circuit is similarly constructed using an operational amplifier 81, and resistors 86 and 87 are connected to a constant power supply voltage V
A voltage V2 obtained by dividing the voltage a is added to the turtle pressure v8 for each person. Therefore, the set voltage VM (corresponding to the set overcurrent value) for the memory circuit is VM-Vs+v2.

Next, the set voltage VD is input to a delay circuit 90 which is a delay means, is delayed (VD D), and is output to an overload detection circuit 100.
It is input to the non-inverting input terminal of the operational amplifier 101). It is also input to the non-inverting input terminal (-1-) of the operational amplifier 111 of the storage circuit 110, which is a set voltage storage means.

Since the multiplier amplifier 111 constitutes a peak detector circuit, the peak value of the set voltage VM is charged (written as "1.@") in the contin-v 112.

The voltage VMc charged in the condenser 112 is input to the non-inverting input terminal of the operational amplifier l (2) of the overload detection circuit 100.

The output Vs of the amplifier 70 is inputted to the inverting input terminal ← of the operational amplifiers 101 and 10217J.

Further, the output of operational amplifier 101.1 (+2&) is also connected to the base of transistor 103. The collector of the transistor 103 is connected via a diode 104 to the inverting input terminal of the operational amplifiers 101, 102I7). This collector is also connected to the base of a transistor 121 of the motor stop circuit 120.

This motor stop circuit 120 includes transistors 1.2].

The collector of the transistor 121 is connected to the base of the transistor 122.

Transistor 122 is 1-7 open/close switch 5°σ
It is inserted between the j closure element taker seedler 1 and the 1 bar 3, 4. Further, 28 is a limit switch which is a signal generating means. The output of this motor stop circuit 12 (l is
It is obtained from the collector of transistor 121 and is input to motor reversing circuit 180 .

The output of the motor stop circuit 120 is "Contin" 1131.
, are input to the inverting input terminal ←) of the operational amplifier 133 via the resistor 182. The output of the operational amplifier 133 is connected to the base of the transistor 134, and the collector is connected to the base of the transistor 134.
It is connected to the L/-I' driver 33.

Next, a transistor 141 connected to the closing terminal of the opening/closing switch detection circuit 141 and the roof opening/closing switch 5o
This is a switching circuit. The collector of this transistor 141 is connected to the motor stop circuit 120.

The motor inrush current mask circuit 150 receives a signal from the close terminal of the roof open/close switch 50, and
j'151. It is input to the non-inverting input terminal (G) of the operational amplifier 15B via the resistor 152. The output of this operational amplifier 153 is input to the motor stop circuit 12 (1).

Further, this output is transmitted to the transistor 11 of the memory circuit 110.
Connected to 3. Further, one end of the contin +1151 is connected to the non-2/1 axis input terminal (1) of the operational amplifier 114 of the storage circuit 110.

Note that a rim switch 22 serving as a signal generating means is connected to the output of the operational amplifier 114 via a diode 115.

Here, 101, 1 (12, 11
4, 138 and 153 have an oven collector type output stage.

In the above configuration, the operation of this embodiment will be explained next.

(1) Opening operation of the roof 7 To open the roof 7, when the opening/closing switch 50 is switched to the open side, the relay driver 83 is energized, the motor 11 rotates forward, and the slide panel 1 is opened.

The safety device does not operate during this opening operation.

(2) Closing operation of the engine 7 When the opening/closing switch 50 is switched to the close side, the transistor 122 is turned on, the relay driver 34 is energized, and the motor 11 starts rotating in reverse. At this time, the transistor 141 of the closing switch detection circuit 140 is turned off, and the collector maintains this barking state while the opening/closing switch 50 is switched to the closed side. Further, since one end of the capacitor 151 of the mask circuit 150 becomes the ground level, the potential at both ends of the capacitor 151 instantly becomes the ground level, and the output of the operational amplifier 158 becomes the "" level.Similarly, the operation of the memory circuit 110 The output of the amplifier 114 also becomes "V level." After that, Contin'41+ 151 is resistance 152
When this voltage reaches the reference voltage determined by the resistors 154 and 155, the output of the operational amplifier 153 returns to zero.

Similarly, the output of the operational amplifier 114 is
When the charging voltage reaches the reference voltage determined by the resistor 116, ll''rc, it becomes the ``H° level.

Here, since the reference voltage of the operational amplifier 158 is higher than the reference voltage of the operational amplifier 114, the operational amplifier 114 reaches the level "'' first. In this embodiment, the time during which the output of each of these operational amplifiers maintains the pulse voltage is 0.3 sec for operational amplifier 153, 0.3 sec for operational amplifier 114, and 0.3 sec for operational amplifier 114. JSo, 28ee, Toshi.

Further, while the output level of the operational amplifier 153 is ≧v, the transistor 118 of the memory circuit 110 is turned off, and the collector becomes an oven.

Now, when the motor 11 starts rotating, a large current flows due to an inrush current, so that VB>VDD and the overload detection circuit 100 is activated. That is, the output of the operational amplifier 101 reaches the level L'L', the transistor 108 turns off, and the collector becomes open. However, as described above, since the output of the mask circuit M150 is at the "level", the motor stop circuit 120 does not operate.

In addition, since the transistor 113 of the memory circuit 110 is off, the capacitor ``+412'' attempts to be charged with VM, but at the same time, since the operational amplifier 114 is outputting the level ``'', the capacitor 112 is not charged ( Thereafter, charging of the capacitor ++ 112 starts when the operational amplifier 114 outputs the H'' level, and continues until the output of the mask circuit 150 switches to the H level. That is, The set voltage VMO corresponding to the set overcurrent value stored in the memory circuit 110 is the storage voltage VM between Q4 sec when the motor 11 starts rotating and Q1 sec later.
remember.

Now, when the slide panel l comes into contact with the deflector arms 121 and 122 after that, it operates normally (see Figure 4).
, the limit switch 22 turns off (see Figure 10).
.

Then, the capacitor 112 is charged by the constant power supply voltage Va via the rediode 115, and the set voltage VMC increases. Determined by width.

Furthermore, the slide panel 1 moves to close, and the limit switch 2
8 fits into the groove 20b of the cam 2() (see FIG. 11), the limit switch 23 turns on and keeps the transistor 121 of the motor stop circuit 120 off. Therefore, the slide panel 1 is connected to the deflector arm 121 +
122'! Even if the overload detection circuit 100 detects a large current value required to move to the sealed state by pressing the motor 11, the motor stop circuit 120 does not operate.

Here, FIG. 18 shows the load current of the motor 11 when the panel 1 is normally driven from the fully open position to the fully closed position. When driving from the fully closed position to the fully open position, either the load current of the motor 11 shows the same value, or the motor electromotive current at the fully open position becomes larger than the level shown in Fig. 12, and The motor current immediately before the motor stops becomes smaller than the level shown in FIG. Also, if the motor 1 is not fully closed or fully open,
Stop 1 once.

When the panel 1 is stopped and then is driven to fully open or fully open, the current of the motor at the time of startup becomes higher than the level during steady running shown in FIG. 12.

If a foreign object such as a body gets caught in the slide panel l during the above-mentioned closing operation, and an overload occurs on the motor 11, the overload detection circuit 100 is activated. At this time, the overload detection circuit 10
0 operates, the collector of transistor 103 becomes
Motor stop circuit 1 because it becomes oven state than level.
20 transistors 121 are turned on. Therefore, since the transistor 122 is turned off, the energization to the relay driver 34 is cut off, and the motor 11 is stopped.

Furthermore, the capacitance of the motor reverse circuit 180 depends on the transistor 121 being turned on! One end of 1131 instantly drops to ground level, and the output of operational amplifier 133 becomes ``''.
Switches from level to 'H' level. Therefore, the transistor 134 is turned on, and the relay driver 33 is energized and the motor 11 rotates in the reverse direction, driving the slide panel 11 in the opening direction.

Thereafter, since the capacitor "l'1.31" is charged via the resistor 132, the output of the operational amplifier 183 gradually returns from the °'H level to the °'L level after a predetermined time, and the transistor 134 is turned off. Then, the drive WJJ f of the motor 11 stops. As described above, the overload of the motor 11 is detected and the slide panel 11 is stopped.

Note that the diode 104 provided in the overload detection circuit 100
This is to prevent malfunction due to chattering caused by a back electromotive force of the motor when the motor 11 is stopped.

Here, in the water example, the set voltage by the memory circuit is switched in two stages using a limit switch, but it is also possible to switch it in multiple stages depending on the application. Furthermore, the wooden example relates to a safety device for an automobile roof.
The present invention can be similarly applied to other on-vehicle equipment that is rotatably driven or reciprocated by an electric mechanism, such as an on-vehicle seat, a blind window, and a mirror.

[Brief explanation of the drawing]

Figure 1 is a plan view showing an overview of the opening/closing mechanism of a run roof installed on the roof of an automobile, Figure 2 is a sectional view taken along the T-line in Figure 1 with the slide panel closed, Figures 3, 4, and 4. 5
The figure is a sectional view taken along line 11 in FIG. 6 is an enlarged plan view of the reducer shown in FIG. 1, FIG. 7 is a sectional view taken along the line ■-Vll in FIG. 6, and FIG. 8 is an enlarged perspective view of a part of the rotating shaft.
9, 10, and 11 are plan views showing the positional relationship of the cam and limit switch of the reducer shown in FIG. FIG. 18 shows the mirror 7 showing the drive motor current, memory circuit setting overcurrent, and delay circuit setting overcurrent when the slide panel is driven from the fully open position to the fully closed position. loo・slide panel, 2...roof, 3...opening, 4...guide rail (supporting means) 51...shoe (supporting means) 161162...' link + 711
72...Cable +8++82...Toothed cable (
Electric drive mechanism), 9...Reducer (electric drive mechanism)
+l O+ 1%~14r,...Gear, 200...
・Planetary gear, 210...Casing internal teeth. 11...Motor (electric drive mechanism) l 12111
22...Arm, 18...Blow plate, ■4...Worm, 15.17.18...Rotating shaft, 20.Pacam
19°°・Eccentric bearing, gQa, 2Ub...i, 2
1...Bin, 22.23...Limit switch (
Signal generation means), 31.32... Relay (Relay, 40,? ;, 1. l'il resistor (
(Means for detecting load), 80... Addition circuit (Means for setting overcurrent value), 90... Delay circuit (Delay means),
100... Overload detection circuit (electronic control device), 110
... Memory circuit (memory means) i120 ... Motor stop circuit (electronic control device), 180 ... Motor reversing circuit (
electronic control device), ■40...close switch detection circuit,
150...Motor inrush current mask circuit (electronic control device) Patent applicant Reio Nakai, Representative of Aisin Seiki Co., Ltd.

Claims (7)

[Claims] (1) Support means for movably supporting the slide panel of Yanru 7 for uIJ vehicles; Electric drive mechanism for driving the slide panel; Il/l
1 coupled to the drive mechanism and commuting to the operation of the electric drive mechanism
Signal generating means for generating a signal corresponding to the position of the roof; Electric driver for energizing the electric motor of the electric drive mechanism; Means for detecting the load on the electric motor; Means for setting an overcurrent value according to the load on the electric motor. storage means for storing the set overcurrent value and changing the stored value based on a signal from the signal generating means; delay means for delaying and outputting the set overcurrent value; and storage means for storing the load of the electric motor. and an output of the delay means, and an electronic control device that stops energizing the electric motor when the load of the electric motor exceeds at least one of the output values. (2) The electronic control device does not perform the comparison for a predetermined period of time from the start of energization of the electric motor, but performs the comparison after a predetermined period of time. Safety device. (3) When the electronic control device is 0 years old and the load on the electric motor exceeds at least one of the output values, the electric motor is energized in the opposite direction for a certain period of time and then stopped, and this state is maintained. A one-roof safety device for an automobile according to claim (1) or (2). (4) The vehicle according to claim (1), wherein the storage means does not store data during a set time period from the start of energization of the electric motor, but stores the set overcurrent value within a certain period of time thereafter. Safety device for Zanru 7. (5) The vehicle according to claim 1, wherein the signal generating means increases the set overcurrent value stored in the storage means by a predetermined amount when detecting that the slide panel has come into contact with the support means. Safety equipment for run roofs. (6) A safety device for a power connector 7 for an automobile according to claim (1), wherein the means for detecting the load on the electric motor is a resistor inserted in the energizing current loop of the electric motor. (7) The safety device for a run roof for an automobile according to claim (1), wherein the means for setting the overcurrent value is a circuit that adds a predetermined current value to the load of the electric motor.