JP2002339651A - Drive for opening/closing slide door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drive for opening/closing a slide door capable of smoothly actuating the slide door for opening and closing by preventing a traction member from slackening due to a delay in response, and solving the problem of a wire being disconnected from a guide pulley or entangled. SOLUTION: The drive for opening/closing a slide door includes a slide door movably provided on a rail attached to a vehicle body; a winding drum driven by a motor; a traction member tied to the slide door and the winding drum at each end and wound on the drum via the guide pulley in opposite directions; and a tension adjusting part for adjusting the tension of the traction member. When the motor is activated or when it is inverted in the direction opposite to one direction of rotation, the motor is controlled for drive in such a way that low-speed drive is effected initially, and that the speed is gradually increased to a predetermined driving speed in a manner corresponding to the mechanical delay in response of the entire drive.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slide in which an indexing member for opening and closing a door is stretched between a slide door and a winding drum, and the winding drum is rotated forward and reverse by a motor to open and close the slide door. The present invention relates to a door opening / closing drive device.

[0002]

2. Description of the Related Art In a conventional sliding door opening / closing drive device, a sliding door is movably mounted on a rail mounted on a side surface of a vehicle. The rail includes a straight portion parallel to the vehicle body and a retracted portion bent inward from an end of the straight portion.

[0003] A wire or a belt as an index member (described as a wire as a representative example), that is, a wire for operating a door closing operation and a wire for operating a door opening operation, are mounted on the winding drum with one end reversely wound, and the other end. Are respectively connected to predetermined positions of the slide door via guide rollers. The wire is provided with a tension adjusting device for adjusting the tension by removing the slack of the wire.

[0004] When the motor rotates forward, the opening operation wire is wound on the winding drum via the guide roller, the slide door is opened, and the slide door is opened. At this time, the door closing operation wire is unwound, and the slack generated in the unwound closing operation wire is absorbed by the tension adjusting device to apply a predetermined tension.

When the motor rotates in the reverse direction, the closing operation wire is wound on the winding drum via the guide roller to close the slide door. When the predetermined position is reached, the auto-closure actuator operates the closure mechanism and the slide door is held in the fully closed state. At this time, the door opening operation wire is unwound, and the slack generated in the unwound opening operation wire is absorbed by a tension adjusting device having a tension pulley, and a predetermined tension is applied.

[0006]

In the above configuration,
As shown in FIG. 4, when the switch is turned on, a duty ratio of 100% is applied to the motor, so that a predetermined number of revolutions is reached after time T, and the winding drum winds and rewinds the wire to open and close the slide door. The operation is performed. However, elongation occurs when the winding tension is applied to the wire. In addition, since there is a backlash in the connection portion at each location or a difference between the bent shape of the rail and the amount of movement of the slide door, the amount of movement of the slide door is smaller than the amount of winding of the wire of the winding drum.

On the other hand, the wire on the rewinding side is unwound by the same length on the drum as the wire on the rewinding side, and the difference between the amount of rewinding of the wire and the amount of movement of the slide door results in slackness of the wire. .

The slack of the wire is absorbed by the tension adjusting device by moving the tension pulley to maintain the tension properly. However, this takes time (the mechanical transmission mechanism is smaller than the response of the motor). However, there is a problem in that the wire is detached from the guide pulley or tangled due to the slack of the wire generated during this time, or the slide door is broken.

In particular, when the sliding door moves through the retraction portion of the rail, the difference between the winding amount of the wire and the moving amount of the sliding door becomes large, so that the occurrence rate of the above-mentioned problem becomes large. is there.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to solve the problem that the index member does not loosen due to a response delay and the wire comes off the guide pulley or becomes entangled. Another object of the present invention is to provide a sliding door opening / closing drive device capable of smoothly performing the opening / closing operation of the sliding door.

[0011]

Means taken to solve the problem according to the invention of claim 1 will be described with reference numerals used in the embodiment. A sliding door 2 movably provided, a winding drum 11 driven by a motor 32, and both ends connected to the sliding door 2 and the winding drum 11 via guide pulleys 5a and 5b, respectively. 11, index members 6a and 6b attached in reverse winding
a sliding door opening / closing drive device 30 having a tension adjusting portion 20 for adjusting the tension of the motor 3a and 6b.
When the motor 2 is started or when the motor rotates in one direction and reverses in the opposite direction, the drive control of the motor is initially set to a low speed drive, and a predetermined drive speed is gradually increased in response to a delay in the mechanical response of the opening / closing drive device 30 as a whole. The feature is that the speed is increased.

According to a second aspect of the present invention, the motor 32 is controlled by a PWM method, and the duty ratio is initially set small at the time of starting or when reversing from one direction of rotation to the opposite direction. %.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. First, in FIGS. 2 and 3, in a sliding door opening / closing drive device 30, a sliding door 2 is attached to a side surface of a vehicle. A rail 4 composed of a straight portion 4a and a retracted portion 4b is attached to the vehicle body 3, and guide pulleys 5a and 5b are attached to substantially both ends of the rail.

A base end of a connecting member 7 is rotatably attached to the slide door 2, and a distal end of the connecting member 7 is movably attached via a guide roller 7a which is guided by the rail 4 and rolls. ing.

One end of each of the wires 6a and 6b as index members is attached to the take-up drum 11, and the other end is passed through guide pulleys 5a and 5b to a predetermined position of the slide door 2, respectively.
That is, in the case of this embodiment, it is connected to the base pivot point of the mounting member 7.

The wires 6a and 6b have tension adjusting portions 2 for absorbing slack of the wires and maintaining proper tension.
0 (only one is shown) is provided. Tension adjusting unit 20
Is a lever 2 provided to be swingable with the base end as a fulcrum.
The tension pulley 22 is attached to the tip of the wire 6a, 6a by a spring 23.
b, and a predetermined tension is applied to the wires 6a and 6b.

When the slide door 2 moves along the rail 4, the fully open position (the end point of the linear portion 4a of the rail 4), the non-entrapment detection position (the boundary point between the linear portion 4a and the drawing portion 4b), the fully closed position A fully open position detection sensor 31a, a non-entrapment detection position detection sensor 31b, and a fully closed position detection sensor 31c are provided at (the end point of the retraction unit 4b).

A motor 32 for driving the opening / closing drive device 30
Are controlled by a PWM method, and the output is adjusted by changing the duty ratio.

The motor 32 is controlled by a controller 35. When the motor is started, for example, when the motor is closed from the fully open position or when the motor is opened from the fully closed position, or when the sliding door inverts the motor 32 across a person or object during the closing operation or the opening operation, The control is performed as shown in FIG.

When the switch is turned on, the motor 32
Fired after hours. Small duty ratio d at the start
It is set to 1 and operated for T1 time. Since the output of the motor 32 is small, the winding drum 11 is driven at a low speed, and the difference from the mechanical response delay of the wires 6a and 6b mediated by the slide door 2 is small. Since the length of the returned 6b is also small, and the difference from the moving amount of the slide door 2 is also small, the tension adjusting unit 2
0 quickly absorbs the slack and maintains proper tension.

Next, the electrical response speed is gradually changed so that the wires 6a and 6b do not loosen in response to the operation of the tension adjusting unit 20, that is, the electrical response speed is gradually changed to match the mechanical response delay. The duty ratio of the motor 32 is increased step by step, and the motor 32 is operated at the duty ratio d2 for T1 time, and then the duty ratio is increased to d3 (100%). Motor 3
The duty ratios d1 and d2 and the operation time T1 of 2 may be set according to the response speed of a mechanical part such as the tension adjusting unit 20.

In this embodiment, the output of the motor 32 is adjusted by changing the duty ratio,
1 was controlled from a low speed to a high speed.
The control may be performed by increasing the terminal voltage of the second terminal from a low voltage to a high voltage.

The controller 35 receives information from the position sensors 31a, 31b, 31c for detecting the position of the slide door 2, and controls the motor 32.

According to the above embodiment, the following effects can be obtained. That is, when the motor 32 is started or when the motor 32 is rotated from one direction to the opposite direction, the motor is initially operated at a low speed and gradually rotates at a predetermined speed in response to the operation of a mechanical portion such as the tension adjusting section 20. Since the speed is increased up to the number, the index members 6a and 6b do not loosen due to the response delay, and eliminate the problem that the wire comes off the guide pulley or becomes entangled. It can be done smoothly.

[0025]

According to the present invention, a slide door movably provided on a rail attached to a vehicle body, a winding drum driven by a motor, and both ends of the sliding door and the winding drum are respectively provided. An opening / closing drive device for a slide door including an index member attached to the drum via a guide pulley and attached to the drum in a reverse winding direction, and a tension adjusting unit for adjusting the tension of the index member, wherein the motor is activated or At the time of reversing from one direction of rotation to the opposite direction, the drive control of the motor is initially set to low speed drive so that the drive speed is gradually increased to a predetermined drive speed corresponding to the overall mechanical response delay of the opening / closing drive device. As a result, slack due to mechanical response delay does not occur in the index member, eliminating the problem of the wire coming off or becoming entangled with the guide pulley, and smoothly opening and closing the slide door. In which an effect that can be performed.

[Brief description of the drawings]

FIG. 1 is a diagram showing a control state of a motor according to the present invention.

FIG. 2 is a plan view of a drive device for opening and closing the slide door.

FIG. 3 is a diagram showing a configuration.

FIG. 4 is a diagram showing a control state of a conventional motor.

[Explanation of symbols]

 Reference Signs List 2 slide door 3 body 4 rail 5a guide pulley 5b guide pulley 6a closing operation wire (index member) 6b opening operation wire (index member) 7a guide roller 11 winding drum 20 tension adjusting unit 30 opening / closing drive device 32 motor

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2E052 AA09 BA02 CA06 DA03 DB03 EA16 EB01 EC01 GB06 GB13 GD03 GD07 HA01 KA13 KA15 KA16

Claims (2)

[Claims] 1. A slide door movably provided on a rail mounted on a vehicle body, a winding drum driven by a motor, and guides having both ends connected to the slide door and the winding drum, respectively. A sliding door opening / closing drive device comprising: an index member attached to the drum in a reverse winding manner via a pulley; and a tension adjusting unit for adjusting the tension of the index member. When the motor is reversed in the opposite direction, the drive control of the motor is initially performed at a low speed, and the speed is gradually increased to a predetermined drive speed in response to a mechanical response delay of the entire opening / closing drive device. Opening and closing drive device for the sliding door. 2. The motor is controlled by a PWM method. At start-up or when reversing from one direction of rotation to the opposite direction, the duty ratio is initially set small, and the duty ratio is increased stepwise to 100%. The opening / closing drive device for a slide door according to claim 1, wherein: