JPH0749747B2 - Automatic opening / closing device for sliding doors - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a device for automatically opening and closing a sliding door of a vehicle.

[Conventional technology]

A conventional device of this type is, for example, JP-A-61-36480.
As disclosed in Japanese Patent Publication No. JP-A-2003-264, a middle portion of a cable in which both end portions are wound around a winding drum pivotally supported on the lower surface of a vehicle body is guided so as to be able to reciprocate along a moving path of a slide door. In addition, a part of the cable was fixed to the tip of the bracket extending inward of the vehicle body from the slide door, and the winding drum was attached to the vehicle body via the electromagnetic clutch and the reduction mechanism. Direction that closes the slide door by rotating the winding drum and rotating the cable by rotating the motor in the required direction when the electromagnetic clutch is engaged and linked to the motor that can rotate forward and backward. Or, there is one that is forcibly moved in the opening direction.

[Problems to be Solved by the Invention]

In the above-mentioned device, in order to prevent the slack of the cable, which is the winding transmission means, it is preferable to provide a tension roller on the vehicle body and press it into contact with the cable.

However, if such a tension roller is brought into pressure contact with the running portion of the cable having the connecting portion with the tip end portion of the bracket, the connecting portion does not contact the tension roller at least once when the slide door is opened and closed. In addition, since the head of the bolt for connection, the metal fitting for connection, etc. protrude from the outer peripheral surface of the cable, the tension roller is likely to be worn or damaged, and the durability deteriorates. At the same time, there is a problem in that the opening and closing operation of the slide door becomes unsmooth, and an abnormal noise is generated when the connecting portion comes into contact with and passes through the tension roller.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an automatic opening / closing device for a sliding door that solves the above problems of the conventional technology.

[Means for Solving the Problems]

In order to achieve the above object, according to the present invention, a movement locus of a tip end portion of a bracket on a slide door side fixed to a winding transmission means is partially curved like the shape of a guide rail for guiding the slide door. In view of this, by limiting the arrangement and range of movement of the tension roller in relation to the movement locus of the tip of the bracket, the connecting portion between the winding transmission means and the bracket is the portion facing the tension roller. It is characterized in that the tension roller does not contact the winding transmission means and the bracket only when passing through, and the tension roller is pressed against the winding transmission means to remove the slack, except for that. There is.

That is, the automatic opening / closing device for a sliding door of the present invention is a straight portion (2a) fixed to a side surface of the vehicle body (1) and parallel to the side surface of the vehicle body (1), and continuous to one end of the straight portion (2a). Then
And a bending portion (2b) that bends inward of the vehicle body (1)
An automatic opening / closing device (A) for a slide door (3) adapted to move along a guide rail (2) including a vehicle body (1) close to the inside of both ends of the guide rail (2).
Between the pair of (17) and (20) pulleys pivotally supported on the bracket, a part of the bracket (23) extending inward of the vehicle body (1) from the slide door (3) is fixed. The winding transmission means (22) is wound around with a required slack, and at least one (17) of the pulleys (17) (20) is connected to the vehicle body (1).
The motor (11) capable of rotating in the forward and reverse directions provided in the vehicle body (1) can be pressed against the inner surface of the winding transmission means (22) inside the running locus of the winding transmission means (22) in the vehicle body (1). The tension roller (28) moves the intermediate portion (T3) between the straight portion (T1) and the curved portion (T2) in the movement locus of the tip portion of the bracket (23) which is parallel to the movement locus of the slide door (3). ) Is mounted so that it can move in a direction intersecting with, and the vehicle body (1)
A biasing means (31) for biasing the tension roller (28) toward the inner surface of the winding transmission means (22) and a direction of the tension roller (28) facing the inner surface of the winding transmission means (22). A stopper (32) is provided to prevent movement at a position at an appropriate distance (D) inward from the intermediate portion (T3) of the movement locus of the tip portion of the bracket (23). .

[Action]

When the motor (11) is rotated in the forward and reverse directions, the pulley (17) is rotated and the winding transmission means (22) wound around the pulley (17) is rotated, whereby the bracket (2) is rotated.
The slide door (3) linked to the winding transmission means (22) via the (3) is opened and closed along the guide rail (2).

When the slide door (3) is opened and closed and the slide door (3) passes through the intermediate portion (2c) between the straight portion (2a) and the curved portion (2b) of the guide rail (2), the bracket (23 ) Also passes through the intermediate portion (T3) between the straight portion (T1) and the curved portion (T2) in the movement trajectory parallel to the guide rail (2), and at this time, the tension roller (28)
Is brought into contact with the stopper (32) and stopped at a position with an appropriate distance (D) inward from the tip of the bracket (23), and the tip of the bracket (23) and the winding transmission means ( 22) is never touched.

At this time, the connecting portion of the winding transmission means (22) with the bracket (23) is farthest from the line (L) connecting the central axes of the pulleys (17) and (20), and the winding transmission means ( 2
Since 2) is in the most tensioned state, slack does not occur in the winding transmission means (22) even if the tension roller (28) is not in pressure contact with the winding transmission means (22).

When the slide door (3) moves away from the middle portion (2c) of the guide rail (2) toward the straight portion (2a) or the curved portion (2b), the tip of the bracket (23) and the winding transmission means (22). )
The connecting portion with and gradually approaches the line (L) connecting the central axes of the pulleys (17) and (20), and a part of the winding transmission means (22) contacts the tension roller (28), The slack of the winding transmission means (22) is removed by the (28).

〔Example〕

An embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, (1) is a car body, (2) is a straight part (2a) fixed to the lower part of the side surface of the car body (1) and parallel to the side surface of the car body (1), and its front end part. A guide rail (3) composed of a curved portion (2b) curved inward of the vehicle body (1) and an intermediate portion (2c) between them is a guide rail (2) and a vehicle body (1). The vehicle body (1) is guided by another guide rail (not shown) provided in the upper part and the middle part, and slightly moves outward from the side surface of the vehicle body (1), and then the vehicle body (1).
Is a sliding door (hereinafter simply referred to as a door) that is opened rearward in parallel with the side surface and closed in the opposite direction.

A bracket (4) that extends substantially horizontally toward the vehicle body (1) is fixed to the lower front portion of the inner surface of the door (3), and the guide rail (2) is attached to the tip of the bracket (4). A vertical roller (5) and a horizontal roller (6) which are adapted to roll along are installed.

On the bottom surface of the vehicle body (1), a case (7) of a shallow box-shaped automatic opening / closing device (A) which is long in the front-rear direction and has an upper surface and a side surface facing the vehicle outer side is provided at a proper position on its upper edge. The attachment piece (7a) is fixed by bolting (not shown).

A drive device (8) is attached to the front upper surface of the bottom plate (7b) of the case (7).

The drive device (8) includes a case (9) and a cover plate (10) that closes the upper end of the case (9), and a forward and reverse rotatable motor (11) is provided in the case (9). A first gear (12) made of a spur gear is fixedly fitted to a rotary shaft (11a) protruding above the motor (11), and the first gear (12) includes a case (9) and a cover plate (10). ) Is meshed with a second gear (13a) composed of a large-diameter spur gear.

The third gear (13b), which is a small diameter spur gear fixed coaxially to the lower surface of the second gear (13a), is the case (9).
It meshes with a fourth gear (15) consisting of a large-diameter spur gear fixed to the upper part of an output shaft (14) which is pivotally supported on the front part of the and which faces in the vertical direction.

Thus, the first gear (12), the second gear (13a), the third gear (13b) and the fourth gear (15) form a reduction gear mechanism (16) including a spur gear train.

The lower part of the output shaft (14) protruding downward through the front bottom wall (9a) of the case (9) located slightly above the upper surface of the bottom plate (7b) of the case (7) has a spline on the outer periphery. A drive pulley (17) having toothed teeth (17a) is fitted by being stopped by a key (18).

(19) is a pedestal fixed on the bottom plate (7b) of the case (7), and the lower end of the output shaft (14) is supported by a shaft hole (19a) provided in the center of the upper surface of the pedestal and is erected from the front and rear parts. The front bottom wall (9a) of the case (9) is supported by the upper ends of the leg pieces (19b) (19c).

A driven pulley (20) is rotatably supported by a shaft (21) directed in the up-down direction on the upper surface of the rear portion of the bottom plate (7b) of the case (7), which is slightly laterally away from the drive device (8). There is. On the outer peripheral surface of the driven pulley (20), spline-shaped teeth (20a) similar to those in the drive pulley (17) are formed.

A toothed belt (winding transmission means) (22) having rack-shaped teeth (22a) on its inner surface is provided around the front drive pulley (17) and the rear driven pulley (20) with a required slack. It is carried around.

As shown in FIGS. 2 and 4, a part of the belt (22) extends from the door (2) toward the inside of the vehicle body (1), and the tip of the bracket (23) for belt connection is extended. It is fixed to a standing piece (23a) formed on the portion with a set screw (not shown) or the like.

The base (23b) of the bracket (23) is a roller (5).
It is fixed to the bracket (4) that supports (6) with bolts (24), and the intermediate portion (23) of the bracket (23) is fixed.
c) extends substantially horizontally from the base (23b) below the bracket (4) toward the inside of the vehicle body (1), and the case (7) has an opening (25) formed on the outer surface thereof. (7)
It is rushing in.

On the upper surface of the bottom plate (7b) of the case (7), the bases of a pair of front and rear arms (26) in the shape of horizontal plates are provided with a shaft (27) which is oriented in the vertical direction.
A tension roller (28) is pivotally supported on the upper surface of the tip end portion of each arm (26) by a shaft (29) oriented in the vertical direction.

The tip of a spring hooking piece (26a) extending laterally from the base of each arm (26) and a protruding piece (3 provided at an appropriate position on the bottom plate (7b).
0) and the respective ends of the tension coil spring (biasing means) (31) are locked.

Each arm (26) is biased in the clockwise direction in FIG. 2 by the tension coil spring (31), and the tension roller (28) at the front of the arm (26) is at the front of the outer running portion of the belt (22). Tension roller (2
8) is pressed against the inner surface of the rear part of the inner running part of the belt (22) to absorb the slack of the belt (22).

Reference numeral (32) is a stopper which is provided on the bottom plate (7b) of the case (7) so as to project, and which restricts the clockwise rotation of each arm (26) in FIG.

The counterclockwise rotation of each arm (26) in FIG.
The arm (26) is restricted by coming into contact with the projecting piece (30).

Thus, the front tension roller (28) causes the rising piece (23) of the bracket (23) which is parallel to the moving path of the slide door (3), that is, the central axis of the guide rail (2).
Straight part (T1) and curved part (T) in the movement trajectory (T) of a)
Mounted on the vehicle body (1) so as to be movable in a direction intersecting with the intermediate portion (T3) between the tension coil spring (3) and
1) is urged toward the inner surface of the belt (22), and the stopper (32) moves the belt (22) in the direction toward the inner surface of the bracket (23).
It is designed to be blocked at a position with an appropriate distance (D) inward from the middle portion (T3) of the movement trajectory (T) of a).

As a result, when the bracket (4) passes through the intermediate portion (2c) between the straight portion (2a) and the curved portion (2b) of the guide rail (2), the tension roller (28) at the front of the front tension roller (28). The rising piece (23a) of the bracket (23) does not come into contact with the rising piece (23a) of the bracket (23) at an appropriate interval, and the rising piece (23a) of the bracket (23) is separated from the front tension roller (28) in the front-rear direction. Press the inner surface of (22).

The rear tension roller (28) is always in pressure contact with the belt (22).

The guide roller (33) is rotatably supported by a shaft (34) at the center of one side of the bottom plate (7a) of the case (7) and is always in pressure contact with the outer surface of the intermediate portion of the inner running portion of the belt (22). Is.

As shown in FIG. 1, in the door (3), a door lock (35) and a known motor drive type that unlocks the door lock (35) prior to the operation of the automatic opening / closing device (A). When the lock release device (36) consisting of an actuator and the door (3) are closed to a predetermined half-latch position,
Latch plate for door lock (35) (not shown)
The door (3) is forcibly rotated by a driving means (not shown) such as a motor to strongly close the door (3) from the half-latch position to the full-latch position, which is a completely closed state, and the door (3). ) Is closed just before the half-latch position, the fixed side power supply connector (3
There is provided a movable side power supply connector (39) which comes into contact with the vehicle body (1) and supplies power to the unlock device (36) and the closure (37) in the door (3) from the vehicle body (1) side.

Next, the operation of this embodiment will be described.

When the door (3) is completely closed, the brackets (4) (23), the belt (22), etc. are in the state shown by the solid line in FIG. Bracket at this time (4) (2
The position of 3) is shown by a code (X1). At this time, each tension roller (28) is in pressure contact with the inner surface of the belt (22), and each arm (26) is in contact with the stopper (32) (depending on how the belt (22) is stretched, Arm (26)
May not contact the stopper (32)).

When the automatic door open switch (not shown) provided in the driver's seat or the like is closed from this state, power is first supplied to the lock release device (36) through the power supply connectors (38) (39), and the door lock (3
5) is unlocked.

Then, the door (3) is slightly opened by the restoring force of the door seal, the rotational biasing force of the latch in the door lock (35), and the like.

At this time, the fastening part of the belt (22) to the bracket (23) slightly moves backward, but at this time, the belt (22)
The minute movement of the local area of the belt can be absorbed by the slack of the belt (22).

When the motor (11) is rotated in a predetermined forward rotation direction after the lock release device (36) is actuated, the drive pulley (17) moves counterclockwise in FIG. 2 via the speed reduction mechanism (16). Is rotated.

By the counterclockwise rotation of the drive pulley (17), first, the belt (22) passes from the winding portion of the drive pulley (17) through the running portion of the vehicle body (1) toward the inside, and the driven pulley (17) is rotated halfway. Then, the belt (22) is pulled up by the drive pulley (17) until the portion of the bracket (23) up to the fastening portion to the upright piece (23a) is tensioned, and the above portion of the belt (22) is pulled. The slack is removed.

As the above portion of the belt (22) is gradually tensioned, each tension roller (28) gradually resists the urging force of the tension coil spring (31) in the counterclockwise direction in FIG. Pushed back to.

During this time, the bracket (23) and the entire door (3) are still stopped.

After tensioning the above part of the belt (22), the drive pulley (1
7) Rotational force via belt (22) to bracket (23)
The bracket (23) and the door (3) start to open rearward.

Between the start of the operation of the motor (11) and the actual start of the movement of the door (3), there is enough time to remove the slack in the belt (22), so that the operation of the unlocking device (36) is prevented. Even if the timing is slightly delayed, the timing error can be absorbed.

Therefore, the motor (11) can be operated simultaneously with or slightly earlier than the operation of the unlocking device (36).

If the motor (11) and the lock release device (36) are operated at the same time, the control becomes simple.

When the motor (11) is operated first and the slack of the belt (22) is being removed, the lock release device (36) is operated to unlock the door lock (35), and the door seal is restored. The force or the rotational biasing force of the latch of the door lock can be used as the initial moving force of the door (3) to continuously open the door (3) backward by the rotation of the belt (22).

After opening door (3) for a while, belt (22)
Moves away from the front tension roller (28) (the arm (26) is in contact with the stopper (32) at this time), and the bracket (4) is guided by the imaginary line (X2) in FIG. When passing through the middle part (2c) of the rail (2),
The upright piece (23a) of the bracket (32) passes through the intermediate portion (T3) of the movement locus (T), and at this time, the front tension roller (28) moves by the stopper (32) to the movement locus (T). ) Is stopped at a position spaced (D) from the middle portion (T3) of the bracket (23), the upright piece (23a) of the bracket (23) and the belt (22) are attached to the front tension roller (2).
8) will not be contacted.

At this time, the connecting portion between the belt (22) and the bracket (23) is farthest from the line (L) connecting the central axes of the pulleys (17) and (20), and the belt (22) is the most tense. Since the tension roller (28) is not in pressure contact with the belt (22), the belt (22) does not sag.

Then, as shown by the imaginary line (X3) in FIG. 2, the bracket (4) enters the straight part (2a) of the guide rail (2),
When gradually approaching the line (L), the belt (22) again contacts the front tension roller (28), and thereafter the bracket (4) (and the door (3) are shown in FIG. 2 by the imaginary line (X4). The tension roller (28) keeps contacting the belt (22) until it reaches the fully open position shown by, and removes the slack of the belt (22).

If the door (3) and the bracket (4) open to the fully open position (X4) and the limit switch (not shown) operates, or if the automatic door open switch is opened while the door (3) is open, the motor The operation of (11) stops and the door (3) stops at that position.

After the door (3) is stopped, the tension roller (28) is rotated clockwise with the arm (26) by the urging force of the tension coil spring (31) and pushes the belt (22) to move the belt. Remove the slack in (22). At this time, the drive pulley (17), the reduction mechanism (16), and the rotation shaft (11a) of the motor (11) may be slightly driven.

When the automatic door open switch (not shown) provided in the driver's seat or the like is closed from the state where the door (3) is opened to the fully open position or an appropriate position on the way, the motor (11) is rotated in the reverse direction and the speed reduction mechanism ( The drive pulley (17) is rotated clockwise in FIG. 2 via 16).

The clockwise rotation of the drive pulley (17) causes the belt (2
In 2), after the slack that was bulged outwardly by the front tension roller (28) is first removed, the whole is swung, whereby the bracket (23) and the door (3) are moved as described above. It is moved forward, that is, in the closing direction, in an operation mode opposite to the above case.

When the door (3) is closed to a predetermined position, the movable side power supply connector (39) contacts the fixed side power supply connector (38),
When the power is supplied to the closure (37) in the door (3) and the door (3) is further closed to a predetermined half-latch position, the closure (37) is activated and the latch in the door lock (35) moves to the vehicle body ( By being forcibly rotated while being engaged with the striker (not shown) on the 1) side, the door (3) causes the closure (3) different from the driving force of the motor (11).
The driving force of 7) closes it to the fully closed position.

The speed at which the door (3) is closed by the operation of the closure (37) at this time, the speed at which the door (3) is closed by the drive of the motor (11) is more than the speed at which the door (3) is closed by the drive of the motor (11). When it is larger, the portion of the belt (22) between the drive pulley (17) and the bracket (23) is slackened to absorb the difference in speed.

When manually closing the door (3) from the state where the door (3) is stopped at the fully open position or at an appropriate position on the way from the fully closed position to the fully open position, first, the door (3) Only part of the belt (22) is moved.

That is, only the door (3) and a part of the belt (22) are moved until the slack of the belt (22) stretched outward by the rear tension roller (28) is removed. The drive pulley (17), the speed reduction mechanism (16) and the rotation shaft (11a) of the motor (11) are driven by the movement of the door (3) for the first time when the above portion in (22) is tensioned.

Therefore, in the initial stage of closing the door (3) manually, the door (3) can be moved from a stationary state with a light force, and when the inertia force of the door (3) is applied, the drive pulley (17 ), The deceleration mechanism (16) and the rotary shaft (11a) of the motor (11) are driven, and this serves as an appropriate check force for the movement of the door (3), and the operability when manually closing the door (3). Is improved.

When manually opening the door (3) from the state in which the door (3) is completely closed, first, the door lock (35) is unlocked by the door handle (not shown), and at the same time, the door (3) is unlocked. ) Is slightly pushed open due to the restoring force of the door seal, etc. Therefore, if the door (3) is opened backward as it is by using the inertia of the door (3) at that time, a large operation is required for the initial movement of the door (3). It can be opened easily without using force.

When opening the door (3), the bracket (2
If there is slack in the belt (22) between the upright piece (23a) and the drive pulley (17) in (3), after the slack is removed, the drive pulley (17) is immediately removed if there is no slack. )
The deceleration mechanism (16) and the like are driven by the movement of the door (3), but as described above, if the door (3) begins to open by utilizing the restoring force of the door seal when the door is unlocked, etc. (3) does not require so much operating force during the initial movement.

The present invention is not limited to the above embodiment,
For example, the following modifications may be performed.

(1) As the winding transmission means, the above toothed belt (22)
Besides, a wire, a chain, or the like can be used.

(2) In the present invention, since only the front tension roller (28) in the embodiment is required, the rear tension roller may be omitted or another tension roller may be provided at another place as necessary. Rollers may be provided.

(3) The structure for supporting the tension roller (28) with respect to the case (7) is such that the slack of the belt (22) can be removed by pressing the tension roller (28) against the belt (22). It may have any structure.

For example, the shaft of the tension roller is slidably attached to a long hole that is orthogonal to the belt (22) provided in the case (7), and the shaft is attached to the belt by a compression coil spring. The structure may be a vibrating structure.

〔The invention's effect〕

According to the present invention, when the sliding door (3) is opened and closed, only when the connecting portion between the tip end portion of the bracket (23) and the winding transmission means (22) passes through the portion facing the tension roller (28). The tension roller (28) does not contact the bracket (23) and the winding transmission means (22), but otherwise, the tension roller (28) can be pressed against the winding transmission means (22) to remove the slack.

Therefore, since the tension roller (28) does not come into contact with the bracket (23), it is less likely to be worn or damaged, durability can be improved, and abnormal noise is not generated.

Further, the winding transmission means can smoothly rotate.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of an automobile equipped with an embodiment of the present invention, FIG. 2 is a partially cutaway plan view of the same, and FIG. 3 is a sectional view taken along line III-III of FIG. 4 is a sectional view taken along the line IV-IV in FIG. (A) Automatic opening / closing device (1) Vehicle body, (2) Guide rail (2a) Straight part, (2b) Curved part (2c) Intermediate part, (3) Sliding door (door) (4) Bracket, (5) Vertical Roller (6) Horizontal roller, (7) Case (7a) Mounting piece, (7b) Bottom plate (8) Drive device, (9) Case (9a) Front bottom wall, (10) Lid plate (11) Motor, ( 11a) rotating shaft (12) first gear, (13a) second gear (13b) third gear, (14) output shaft (15) fourth gear, (16) reduction mechanism (17) drive pulley, (17a) Tooth (18) key, (19) pedestal (19a) shaft hole, (19b) (19c) leg piece (20) driven pulley, (20a) tooth (21) shaft, (22) belt (winding transmission means) ( 22a) Teeth, (23) Bracket (23a) Standing piece, (23b) Base (23c) Intermediate part, (24) Bolt (25) opening, (26) Arm (26a) Spring hooking piece, (27) Shaft (28) ) Tension roller, (29) shaft (30) Projection piece (31) Tension coil spring (biasing means) (32) Stopper, (33) Guide roller (34) Shaft, (35) Door lock (36) Unlock device, (37) Closure (38) Fixed side power supply connector, (39) movable side power supply connector

Claims (1)

[Claims] 1. A guide rail provided with a straight portion fixed to a side surface of a vehicle body and parallel to the side surface of the vehicle body, and a curved portion continuous with one end of the straight portion and curved inward of the vehicle body. An automatic opening / closing device for a sliding door, which is adapted to move along the inside of both ends of a guide rail and is pivotally supported on a vehicle body.
Between the pair of pulleys, a winding transmission means, which is partially fixed to the tip of the bracket extending from the slide door toward the inside of the vehicle body, is wound around with a required slack, and at least the pulley One of them is linked to a forward / reverse rotatable motor provided on the vehicle body, and a tension roller that can be pressed against the inner surface of the winding transmission means is moved inward of the running trajectory of the winding transmission means in the vehicle body to move the slide door. The bracket is mounted so as to be movable in a direction intersecting an intermediate portion between a straight line portion and a curved portion in a movement locus of the tip end portion of the bracket that is parallel to the locus, and a tension roller is attached to the inner surface of the winding transmission means on the vehicle body. The urging means for urging toward the inner side and the movement of the tension roller in the direction toward the inner surface of the winding transmission means are prevented at a position spaced inwardly from the middle part of the movement locus of the tip portion of the bracket. You Automatic opening and closing device for sliding doors, characterized by comprising a stopper.