JP2005036469A - Power sliding door device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a safe power sliding door using a pulse count reference setting method for correctly operating a power sliding door. <P>SOLUTION: This power sliding door device A comprises the sliding door 1 operated to open/close by a driving means; a pulse generating means for generating pulses according to the operation of the sliding door 1; a position detecting means for detecting the position of the sliding door 1 by counting the pulses generated by the pulse generating means; and a control unit 15 for controlling the driving means according to the output of the position detecting means. The position detecting means starts counting on the basis of the closed position of the sliding door 1, and a range of prescribed pulse number based on the closed position is set as a closing region. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a power sliding door device for a vehicle, and more particularly to a device for safely operating a sliding door.
[0002]
[Prior art]
[Patent Document 1] JP-A-11-71959
Patent Document 1 discloses an overload detection area setting method for an electric sliding door. Conventionally, in order to operate the electric sliding door safely, the electric sliding door is operated by detecting a first overload detection area for reversing the motor immediately when an overload is detected, and an overload detection provided near the fully closed position. However, there are provided two areas called a second overload detection area for driving the motor as it is. And the overload detection load value larger than the overload detection load set with respect to the reverse region is set in the confinement region. This is because near the fully closed position, motor power is required to close the slide door by the reaction force of the weather strip. However, the entire stroke of the sliding door is strictly different for each vehicle. Usually, the confinement area is set narrowly, and a hand or the like is set so as not to enter the confinement area.
[0003]
In the method for setting an overload detection area of an electric slide door disclosed in Patent Document 1, a constant overload detection area is set before the fully closed position of the electric slide door. That is, as shown in the timing chart of FIG. 7, the electric sliding door is operated from the fully open position to the fully closed position, and the number of pulses generated by the pulse generating means interlocking with the opening / closing operation is counted three times to obtain the median value. The number of pulses N is calculated to define the entire stroke of the electric sliding door. Then, a region converted by Nn obtained by subtracting the pulse number n of the predetermined region set before the fully closed position from the pulse number N is set as an inversion region. Thus, since the number N of pulses is set for each vehicle, a confinement region N-n is also set for each vehicle.
[0004]
[Problems to be solved by the invention]
According to the conventional example, in order to prevent the cable from being bent, an error in detecting the sliding door position due to the loose spring that biases the end of the conduit by the extension of the cable can be absorbed. Changes over time cannot be absorbed and cause errors.
[0005]
The present invention has been made based on such a background, and an object of the present invention is to provide a power slide door device that facilitates accurate position detection.
[0006]
[Means for Solving the Problems]
The power sliding door device of the present invention (Claim 1) includes a sliding door that is opened and closed by a driving means, a pulse generating means that generates a pulse in response to the operation of the sliding door, and a pulse generated by the pulse generating means. A position detection unit that counts and detects the position of the slide door, and a control unit that controls the drive unit according to the output of the position detection unit. The position detection unit detects the position where the slide door is closed. Counting is started as a reference, and a range of a predetermined number of pulses is set as a closed region with the closed position as a reference. Such an apparatus is preferably one in which the count number of the position detecting means is reset to a reference value every time the sliding door comes to a closed position (Claim 2). Further, it is more preferable that the closed position is a position where the half latch is detected during the automatic closing operation (Claim 3).
[0007]
[Operation and effect of the invention]
Since the power slide door device according to the present invention (claim 1) is based on the position where the door during the automatic closing operation is closed, the position of the door during the automatic closing operation can be accurately recognized. In other words, even if the number of pulse counts is the same at the same door position, even when the auto-opening operation is different from the closing operation, the position of the auto-closing operation is based on the closed position in this way. It is possible to accurately set the distance of the confinement region where a load may be applied when a hand or the like is pinched. For this reason, since a confinement region larger than necessary is not set, the device is safe.
[0008]
Further, when the count number of the position detecting means is reset to a reference value every time the sliding door comes to the closed position (Claim 2), even if the door position corresponding to the pulse number is shifted due to secular change. It is difficult for the confinement area near the closure to be widened or narrowed. Further, unlike the prior art, a learning operation is not required in which the number of pulses linked to the entire stroke of the electric sliding door is counted three times for each vehicle. Further, when the reference position for counting pulses is set to a position where the half latch is detected during the automatic closing operation (Claim 3), for example, a half latch that causes a reaction force when the door is closed and Since the reference position is set at a location over the weather strip portion, it is possible to set the region near the closing more accurately during the closing operation. Therefore, safety is improved.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of a power slide door device of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram showing the operating region of the power sliding door device of the present invention, FIG. 2a is a door speed in the closing direction of the door, FIG. 2b is a schematic diagram showing the door speed in the opening direction, and FIG. FIG. 4 is a block diagram of this power sliding door device, FIG. 5 is a schematic diagram showing an embodiment of the power sliding door device of the present invention, and FIG. 6A is a top view of the sliding door unit. 6b is a bottom view of FIG. 6a.
[0010]
First, a power sliding door device A used in the present invention will be described with reference to FIG. As shown in FIG. 5, the power slide door device A of the present invention is used in a one-box type vehicle C, for example. The power sliding door device A of the vehicle C includes a door 1, rails 2 (a central rail 2a and upper and lower rails 2b) provided at the center and upper and lower ends of the vehicle body C for sliding the door 1, and a center thereof. And a power slide door unit 3 for sliding the slide door 1 along the rail 2a.
[0011]
This will be described in more detail with reference to FIG. First, the power slide door unit 3 of FIG. 6 a is arranged on a central rail 2 a arranged near the center of the slide door 1. Near the front end 4 of the central rail 2a is curved toward the vehicle inner side, and near the rear end 5 extends straight. The center rail 2a has an arm 1a for slidably mounting between the front and rear ends thereof for attaching the door 1. A roller 6 or the like that rolls in the center rail 2a is rotatably attached to the arm 1a. The arm 1a is engaged with the end portion of the cable 7a for moving the door 1 forward and the end portion of the cable 7b for moving the door 1 backward. The cables 7a and 7b extend along the center rail 2a outside the vehicle body C.
[0012]
A guide pulley 8 for changing the direction of the cable is rotatably attached to the outer wall of the vehicle body near the front end 4 of the center rail 2a. The guide pulley 8 is supported by a box-shaped bracket 12. The forward cable 7a passes through a hole formed in the outer wall of the vehicle body, enters the inside of the vehicle body, is changed in direction by the guide pulley 8, and is guided to the drive unit 10 by the conduit 9a. On the other hand, a guide portion 13 is arranged in the vicinity of the rear end 5, and the cable 7b that moves backward is guided by the guide portion 13 through the hole in the outer wall of the vehicle body and guided by the guide portion 13 to the drive portion 10 by the conduit 9b. Has been.
[0013]
As shown in FIG. 6b, the drive unit 10 winds the other end side of the forward and backward cables 7a and 7b, rewinds and winds the cable loop back and forth to drive the cable loop, and the drum 11 Although not shown, the motor M is a conventionally known one having an electromagnetic clutch K and a speed reducer for transmitting and releasing the driving between the drum 11 and the motor M. In this embodiment, the drive unit 10 is disposed laterally so as to pull out the cables 7a and 7b from the vehicle body C, and one end of the conduit 9a that guides the cable 7a for forward movement is connected to the bracket 12 and is bent upward therefrom. , It turns to the rear of the drive unit 10, is curved in a large arc shape, and is connected to the drive unit 10. On the other hand, the conduit 9b that guides the cable 9b for retreating extends backward from the guide portion 13, curves upward in an arc shape, then curves downward, and is connected to the drive unit 10. The drive unit 10 and the conduits 9a and 9b are accommodated in a panel on the side wall of the automobile. A loose spring 18 is arranged at the end of the conduits 9a and 9b connected to the drive unit 10 side. The loose spring 18 urges the ends of the conduits 9a and 9b so that the cables 7a and 7b are extended by an amount corresponding to the extension, thereby preventing the cables from being bent.
[0014]
From here, FIG. 4 will be described in detail. The drive unit 10 is provided with a pulse generator 14 that measures the rotation angle of the drive unit 10, and generates a pulse according to the rotation angle of the drive unit 10. That is, the rotation of the drive unit 10 is the amount of movement of the door 1, and the amount of movement is converted by the number of pulses. Pulses generated from the pulse generator 14 are transmitted to a control unit (hereinafter referred to as ECU) 15 which will be described later, where the pulses are counted. The ECU 15 controls the opening and closing of the door based on the number of pulses, as will be described later. As the pulse generator 14, a conventionally known one can be used. The pulse generator 14 generates a pulse in accordance with the rotational angle of the rotational motion transmitted from the drive shaft of the motor M via the electromagnetic clutch K, and is provided on the drive shaft on the door side of the electromagnetic clutch K. preferable.
[0015]
As described above, the constructed door 1 includes a latch mechanism 16 that is provided inside the door 1 and latches the door 1 and the vehicle body C. This is almost the same as that used in the conventional door lock mechanism. The latch mechanism 16 divides the latch state of the door 1 into an open state, a full latch state, and a half latch state that is an intermediate state between the two. In these latch states, the transition is made smoothly from the open state to the full latch state, and the latch state is not changed from the full latch state to the open state. Further, in order to change the latch state of the latch mechanism 16 from the open state to the half latch state or the full latch state, it is necessary to overcome a predetermined urging force such as a spring or a spring.
[0016]
The process until the door 1 is operated from the open state to the closed state by the latch mechanism 16 formed as described above, and then enters the full latch state through the half latch state will be described. As the door 1 is closed, the latch mechanism 16 provided on the door 1 shifts from the open state to the half-latch state against the bias of the spring or the like. In the half latch state, the latch state is further shifted to a full latch state by a locking cable or an actuator (not shown). Although not shown, in order to keep the door 1 open when the door 1 is opened, an opening latch is provided in the vehicle body C, and the door 1 is fully opened by the opening latch. maintain.
[0017]
Returning to FIG. 4, the vehicle body C is provided with a door switch 19 as a switch for detecting the open / closed state of the door 1, which detects that the door 1 is fully closed and OFF. Further, as a switch for detecting the fully open position of the door 1, there is a fully open switch 20. The fully open switch 20 is turned on when the slide door 1 is fully opened, and is otherwise turned off.
[0018]
The latch mechanism 16 has a switch for detecting the latch state. The half latch switch 17 detects whether the latch state between the vehicle body C and the door 1 is a half latch. The half latch switch 17 is turned on when the door 1 is in the half latch position or fully closed, and is turned off otherwise. On the other hand, the vehicle body C is provided with an ECU 15 for controlling these switches, the door 1 and the power slide door unit 3. The ECU 15 receives inputs from these switches and pulses generated from the pulse generator 14, and controls the position of the door 1 and the speed of the door 1 according to the position, as will be described later.
[0019]
Next, operation | movement of the door 1 arrange | positioned in this way is demonstrated using FIG. First, when the door 1 is closed from the fully open state, when a predetermined start condition for the closing operation is satisfied (S1), the drive motor M is driven and the closing operation is started (S2a). When the closing operation proceeds and the door 1 reaches the half latch position, the half latch switch 17 is turned ON.
[0020]
When ON of the half latch switch 17 is detected, the pulse count is reset to the reference value (S3a), and the drive motor M is stopped (S4a). When the drive motor M stops and the door 1 is fully closed, the door switch 19 is turned on.
[0021]
In this way, since a predetermined value is substituted for the number of pulses for each closing operation at the half latch position, the actual door position and the number of pulses are not likely to be shifted near the closing due to the expansion of the loose spring 18 or the like.
[0022]
For detection of pinching, an average pulse width of the obtained pulses for the past several times, the presence or absence of a pulse within a predetermined time interval, an overcurrent to the motor M, or the like is used. Parameters for detecting such pinching are set for each door position area, which will be described later, and are performed by comparing the value with a parameter set for each door position area.
[0023]
Next, when the door 1 operates from closed to open, first, a predetermined opening condition is established (S1), and then the operation of the door 1 in the opening direction starts (S2b). If the door 1 operates in the opening direction as it is and the door 1 reaches the fully open position, the fully open switch 20 is turned on, and the fully open position of the door 1 is detected (S3b). Next, the drive motor M is stopped (S4b), and after a predetermined time has elapsed, the electromagnetic clutch K is released.
[0024]
Next, a state in which the door 1 is closed will be described with reference to FIGS. 1a and 2a. When closing the door 1, the fully open switch 20 is switched from ON to OFF, and the ECU 15 starts counting the number of pulses. The first region 30 is the number of pulses up to n1 after the closing operation. In the first region 30, the door speed is accelerated to V1. Next, the door is at a constant speed V1 until the number of pulses reaches n2. A region where the door speed is constant is a second region 31. Since the speed of the door 1 is fast in the second region 31, the load value for detecting pinching is set sensitively. After passing through the second area 31, it becomes an area that decelerates when the door 1 approaches the closed area. When the number of pulses is n2 to n3, there is a third region 32, and there are a fourth region 33 up to n4 and a fifth region 34 up to n5 from there. These first, second, third, fourth and fifth areas are inversion areas, and the parameters as described above are set so that the door 1 can be immediately inverted when a load is applied. The parameter for reversal is set more sensitively as the door speed increases. In particular, there is a risk that a hand or the like may be caught in the vicinity of the door, so that the area where the door 1 is decelerated passes through several stages, and the reversing parameters according to the speed are set by the ECU 15 in each area. Yes.
[0025]
When the door 1 reaches the position of the pulse number n5, the closed section 35 is reached from here until the door 1 is in the half latch state. In the closing section 35, a force is required to overcome the above-described spring reaction force and weather strip reaction force for the door 1 to reach the half latch state. Therefore, as shown in FIG. 2a, the door speed is decelerated to the speed V3 between n2 and n6 pulses. However, the door speed is accelerated to the speed V2 in order to proceed to the half-latch state, and is described above. Overcoming the reaction force. In this closed section 35, when a hand or the like is caught, the reaction force as described above may be transmitted to the hand as it is, but in this embodiment, the closed section 35 is reduced to about 3 to 9 mm. be able to. Since it is such a small distance, it is safe because there is almost no risk of hands actually being caught. In other words, if there is an error in position accuracy, the confinement load is set to a value that takes the error into account, but the area can be reduced with accurate position accuracy as in this embodiment. This also reduces the width of the set confinement region and reduces the load value, which is a safe device.
[0026]
Next, the state in which the door 1 is opened will be described with reference to FIGS. 1b and 2b. First, a predetermined value is substituted for the number of pulses at the half latch position when closed. The door 1 is changed from the full latch to the half latch state, and the number of pulses from the half latch state to n7 pulses is defined as the sixth region 36. In this region, the door speed is accelerated to V5 as shown in FIG. 2b. Next, there is a seventh region 37 having a pulse count number of up to n8. Until the pulse count reaches n9, the door speed is constant at V5, and then the door speed is reduced to V4 from n9 toward the fully open position. Returning to FIG. 1b, when the pulse count exceeds n8, the checker section 38 is entered. In the checker section 38 where the door is fully opened, the fully open switch 20 is turned ON and the door is kept open. Note that the number of pulses set in such a region can be adjusted by the ECU 15 or the like.
[0027]
In this way, when the door is operated from the closed position to the open position, there is little possibility that a hand or the like will be caught. Every time the closing operation is performed, a predetermined value is always substituted at the half-latch position, and the pulse number count is reset. . In this embodiment, the count of the number of pulses is reset every time the half latch state is reached during the closing operation, but such an operation may be performed every certain number of times or at the start of operation.
[Brief description of the drawings]
FIG. 1 is a schematic view showing an operation region of a power slide door device of the present invention.
FIG. 2a is a schematic diagram showing the door speed in the closing direction of the door, and FIG. 2b is a schematic diagram showing the door speed in the opening direction.
FIG. 3 is a flowchart showing a control flow of the power sliding door device of the present invention.
FIG. 4 is a block diagram of the power sliding door device of the present invention.
FIG. 5 is a schematic view showing an embodiment of a power slide door device of the present invention.
6A is a top view of the sliding door unit, and FIG. 6B is a bottom view of FIG. 6A.
FIG. 7 is a chart showing a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Door 1a Arm 2a Rail 2b Rail 3 Power slide door unit 4 Front end vicinity 5 Rear end vicinity 6 Roller 7a Pull cable 7b Pull cable 8 Guide pulley 9a Conduit 9b Conduit 10 Drive part 11 Drum 12 Bracket 13 Guide part 14 Pulse generator 15 ECU
16 Latch mechanism 17 Half latch switch 18 Loose spring 19 Door switch 20 Fully open switch 30 1st area 31 2nd area 32 3rd area 33 4th area 34 5th area 35 Closed section 36 6th area 37 7th area 38 Checker Section A Power sliding door device C Car body K Electromagnetic clutch M Motor N Number of pulses n Number of pulses

Claims (3)

A sliding door that opens and closes by driving means;
Pulse generating means for generating a pulse in response to the operation of the sliding door;
Position detecting means for detecting the position of the sliding door by counting the pulses generated by the pulse generating means;
A control unit for controlling the driving means according to the output of the position detecting means,
A power slide door device in which the position detection means starts counting with a position where the slide door is closed as a reference, and a range of a predetermined number of pulses is set as a closed region with the closed position as a reference. The power slide door device according to claim 1, wherein the count number of the position detection means is reset to a reference value every time the slide door comes to a closed position. The power sliding door device according to claim 1 or 2, wherein the closed position is a position where a half latch is detected during an automatic closing operation.

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