JP3771324B2 - Tensioner structure of vehicle sliding door opening and closing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement in a tensioner structure of a sliding door opening / closing device.
[0002]
[Prior art]
As a technique for opening and closing a sliding door of a vehicle via an endless member (belt or chain), for example, Japanese Patent Laid-Open No. 4-62284, “Automatic Opening and Closing Device for Slide Door” is known. Endless member, and a driven pulley on the border divided into a tension side and the loose side, since there is a possibility that an endless member in the loose side deviates from the pulley, to place the tensioner in its position, necessary to absorb the slack There is. Therefore, in FIG. 2 of the above publication, two sets of tensioners composed of components 26 to 31 are arranged. This is because two sets of endless members are required for forward and reverse rotation.
[0003]
[Problems to be solved by the invention]
Each of the above tensioners needs to be provided with a support from the vehicle body side and attached to the tip thereof, and a member such as a support is required.
However, due to the recent demand for vehicle weight reduction, simplification of the support and rational tensioner placement technology are desired.
[0004]
[Means for Solving the Problems]
In order to meet the above-mentioned demand, claim 1 arranges a seesaw bracket with the center of oscillation aligned with the center of rotation of the drive pulley, and freely rotates two pulleys that absorb slack of endless members at both ends of the seesaw bracket. mounted for, and these two pulleys, when multiplied by the perforated belt as an endless-shaped member to a drive pulley with a nail, the axes of the two pulleys, perforated belt than the center of rotation of the drive pulley by There is arranged close to the Iteiru side with around the driving pulley, when the driving pulley is rotated to one rotational direction, seesaw bracket to extrude the endless member is of one pulley of the tension-side one The other pulley absorbs the slack of the endless member on the loose side .
In the perforated belt, when one of the drive pulleys is on the tension side and the other is on the loose side, and one pulley is pushed out on the tension side, the other pulley pushes the perforated belt by that amount, absorbs slack, and A certain amount of perforated belt can be reliably engaged with the drive pulley. Therefore, a very reasonable tensioner can be provided.
[0005]
According to a second aspect of the present invention, two pulleys are attached to the seesaw bracket via an elastic body.
If the pulley is always urged to the endless member by the elastic body, a preferable tension can always be applied to the endless member, and smooth power transmission can be achieved.
[0006]
The third aspect of the present invention is characterized in that the seesaw bracket is directly supported on a rotating shaft that supports the drive pulley.
Since the seesaw bracket is directly supported by the rotating shaft that supports the drive pulley, there is no need to take out the bracket or support from the vehicle body side.
[0007]
According to a fourth aspect of the present invention, the seesaw bracket is swingably attached to an equipment case that supports the rotating shaft.
Since the seesaw bracket is attached to the equipment case, the load on the rotating shaft does not increase. Therefore, it is not necessary to increase the diameter of the support shaft, which is a rotating shaft, and the apparatus can be made compact.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.
FIG. 1 is a conceptual diagram of a vehicle equipped with a sliding door opening / closing device according to the present invention. A one-box car type vehicle 1 includes a sliding door 2 and a sliding door opening / closing device 10, for example, operating a door knob 3. Then, the information reaches a controller (not shown) on the vehicle body side via the flexible conductor 4. The controller starts the sliding door opening / closing device 10 to open and close the sliding door 2.
[0009]
For this purpose, the sliding door opening and closing device 10 includes, for example, a drive motor 11, a speed reducer 12, a drive pulley 13, guide pulleys 14 and 14, and an endless member 15 (specifically, spanning these pulleys 13, 14, and 14). 1 includes a perforated belt (hereinafter simply referred to as “belt 15”), an attachment fitting 16, and a tensioner structure 20. The attachment fitting 16 is a fitting that connects the belt 15 and the slide door 2.
[0010]
2 is a plan view of the tensioner structure (first embodiment) according to the present invention, FIG. 3 is a front view of the tensioner structure, and the tensioner structure 20 is connected to a rotary shaft 21 that is an output shaft of the speed reducer 12 via a bearing 22. And a pulley 25, 25 attached to both ends of the seesaw bracket 23 via shafts 24, 24.
26 is a bearing, 27 is an end plate, and 28 is a bolt.
[0011]
The central drive pulley 13 includes claws 29 (... indicates a plurality, the same applies hereinafter), and drives the belt 15 .
[0012]
Next, the operation of the tensioner structure described above will be described.
4 (a) and 4 (b) are operation explanatory views of the tensioner structure according to the present invention.
In (a), when the drive pulley 13 rotates counterclockwise, the left side of the drive pulley 13 becomes the tension side and the right side becomes the loose side. On the tension side, as a result of being strongly pulled by the drive pulley 13, the belt 15 tries to be straight, and the left belt 15 moves from the position of the imaginary line to the position of the solid line, and the left pulley 25L (L for convenience) Or R.) is extruded as shown by arrow (1). The seesaw bracket 23 swings counterclockwise, and the right pulley 25R on the opposite side moves as shown by arrow (2). As a result, the right pulley 25R absorbs the slack of the belt 15.
[0013]
(B) is the reverse of (a), and when the drive pulley 13 rotates clockwise, the right side in the figure is the tension side and the left side in the figure is the loose side. Therefore, the right pulley 25R is extruded as shown by the arrow (3). The left pulley 25L moves as shown by arrow (4). As a result, the left pulley 25L absorbs the slack of the belt 15.
[0014]
Thus, since one pulley 25L or 25R always acts as a tensioner on the belt 15 that rotates to the left and right for forward and reverse rotation, smooth power transmission can be performed. Moreover, since the seesaw bracket 23 is provided on the rotating shaft 21 (see FIG. 3), there is no need to take out a dedicated support from the vehicle body as in the prior art.
[0015]
FIG. 5 is a plan view of a tensioner structure (second embodiment) according to the present invention, FIG. 6 is a front view thereof, and the tensioner structure 30 is a seesaw bracket 33 attached to a rotary shaft 21 that is an output shaft of the speed reducer 12. And pulleys 25, 25 attached to both ends of the seesaw bracket 33 via elastic bodies 34, 34 and levers 35, 35.
[0016]
The elastic body 34 is preferably a rubber or a torsion spring, and biases the pulleys 25 and 25 toward the belt 15 via the levers 35 and 35. Accordingly, it is possible to always generate a preferable tension on the belt 15.
[0017]
FIG. 7 is a front view of a tensioner structure (third embodiment) according to the present invention. The tensioner structure 40 has a drive pulley 13 attached to a rotating shaft 41 of the speed reducer 12, while the device case 12 a of the speed reducer 12 is attached. A seesaw bracket 43 attached via a bearing 42 and pulleys 25, 25 attached to both ends of the seesaw bracket 43 via elastic bodies 44, 44 and levers 45, 45.
In general, a large load is applied to the pulleys 25, 25 acting as tensioners. Therefore, if the seesaw bracket 43 is attached to the device case 12a instead of the rotating shaft 41, the force acting on the rotating shaft 41 is drastically reduced, and the diameter of the rotating shaft 41 can be suppressed to an economical one.
[0018]
The seesaw bracket 23 of the first embodiment may be attached to the device case 12a side of the speed reducer 12 instead of the rotating shaft 21. If it does so, both the length and diameter of the rotating shaft 21 can be made small.
Further, the belt 15 is preferably a perforated belt in which a flat hole is simply formed in the flat belt of this embodiment, but may be a timing belt, a V belt, a roller chain, a wire, or a rope. .
[0019]
【The invention's effect】
The present invention exhibits the following effects by the above configuration.
According to a first aspect of the present invention, a seesaw bracket is arranged with the center of swing of the drive pulley aligned with the center of rotation, and two pulleys that absorb the slack of the endless member are attached to both ends of the seesaw bracket so as to freely rotate. and two pulleys, when multiplied by the perforated belt as an endless-shaped member to a drive pulley with a nail, with winding two pulleys, the perforated belt drive pulley to the rotation center of the drive pulley Iteiru When the drive pulley is rotated in one rotation direction, the seesaw bracket swings in one rotation direction so that the endless member on the tension side pushes one pulley when the drive pulley rotates in one rotation direction. The other pulley absorbs the slack of the endless member on the loose side .
In the perforated belt, when one of the drive pulleys is on the tension side and the other is on the loose side, and one pulley is pushed out on the tension side, the other pulley pushes the perforated belt by that amount, absorbs slack, and A certain amount of perforated belt can be reliably engaged with the drive pulley. Therefore, a very reasonable tensioner can be provided.
[0020]
According to a second aspect of the present invention, two pulleys are attached to the seesaw bracket via an elastic body.
If the pulley is always urged to the perforated belt by the elastic body, a preferable tension can always be applied to the perforated belt , and smooth power transmission can be achieved.
[0021]
The third aspect of the present invention is characterized in that the seesaw bracket is directly supported on a rotating shaft that supports the drive pulley.
Since the seesaw bracket is directly supported by the rotating shaft that supports the drive pulley, there is no need to take out the bracket or support from the vehicle body side.
[0022]
According to a fourth aspect of the present invention, the seesaw bracket is swingably attached to an equipment case that supports the rotating shaft.
Since the seesaw bracket is attached to the equipment case, the load on the rotating shaft does not increase. Therefore, it is not necessary to increase the diameter of the support shaft, which is a rotating shaft, and the apparatus can be made compact.
[Brief description of the drawings]
FIG. 1 is a conceptual diagram of a vehicle equipped with a sliding door opening and closing device according to the present invention. FIG. 2 is a plan view of a tensioner structure according to the present invention (first embodiment). FIG. 4 is a front view of the tensioner structure according to the present invention. FIG. 5 is a plan view of the tensioner structure according to the present invention (second embodiment). FIG. 6 is a tensioner structure according to the present invention. Front view of (second embodiment) [FIG. 7] Front view of tensioner structure according to the present invention (third embodiment) [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Vehicle, 2 ... Sliding door, 3 ... Door knob, 10 ... Sliding door opening / closing device, 11 ... Drive motor, 12 ... Reduction gear, 12a ... Equipment case, 13 ... Drive pulley, 15 ... Endless member ( perforated belt) , 20 ... tensioner structure, 21, 41 ... rotating shaft, 23, 33, 43 ... seesaw bracket, 24 ... shaft, 25 ... pulley, 29 ... claw, 34 , 44 ... elastic body.

Claims (4)

In a vehicle sliding door opening and closing device that opens and closes a sliding door with an endless member rotated by a driving pulley,
A seesaw bracket is placed with the center of swing of the driving pulley aligned with the center of rotation, and two pulleys that absorb the slack of the endless member are attached to both ends of the seesaw bracket so as to freely rotate .
And two pulleys of these, when multiplied by the perforated belt and the drive pulley with a claw as an endless-shaped member, the axes of the two pulleys, the perforated belt than the center of rotation of the drive pulley by arranged close to Iteiru side with around the driving pulley,
When the drive pulley rotates in one rotational direction, the endless member on the tension side pushes one pulley so that the seesaw bracket swings in the one rotational direction and the other pulley is loosely endless. tensioner structure of the sliding door opening and closing apparatus for a vehicle characterized that you absorb the slack of the Jo member.   2. The tensioner structure for a sliding door opening and closing device for a vehicle according to claim 1, wherein the two pulleys are attached to a seesaw bracket via an elastic body.   3. The tensioner structure for a sliding door opening and closing device for a vehicle according to claim 1, wherein the seesaw bracket is directly supported by a rotating shaft that supports a drive pulley.   The tensioner structure for a sliding door opening and closing device for a vehicle according to claim 1 or 2, wherein the seesaw bracket is swingably attached to an equipment case that supports a rotating shaft.

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