JP2009299344A - Automatic opening and closing device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automatic opening and closing device for a vehicle having both quietness and miniaturization. <P>SOLUTION: In this automatic opening and closing device for a vehicle, a tensioner storage chamber 25b is provided in the case 25 of a driving unit, and a closing side tensioner mechanism 34b for applying the predetermined tensile force to a closing side cable 24b is stored in the tensioner storage chamber 25b. The tensioner mechanism 34b is provided with a guide shaft 41, and a pulley holder 42 is movably mounted along the axial direction of the guide shaft 41 and turnably around an axis of the guide shaft 41. A scope of moving α of the pulley holder 42 supporting a tensioner pulley 46 around which the cable 24b is wound turnably is regulated due to its abutting on the case 25 and a cover 36, and the pulley holder 42 is made to abut on the case 25 and the cover 36 while being urged by the cable 24b when a slide door is at its fully opened position and fully closed position. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an automatic opening / closing device for a vehicle that automatically opens and closes an opening / closing body provided in a vehicle body.

  Conventionally, in a wagon car or a one-box car, a sliding door that opens and closes in the vehicle front-rear direction is provided on the side of the vehicle body, so that passengers can easily get on and off and load and unload luggage. Such sliding doors are usually opened and closed manually. However, in recent years, an automatic opening and closing device is mounted on a vehicle, and the automatic opening and closing device automatically opens and closes the sliding door. There are many vehicles.

  As such an automatic opening and closing device, a cable (strip body) connected to the sliding door from the vehicle front-rear direction is guided to a drive unit disposed on the vehicle body via reversing pulleys disposed at both ends of the guide rail, A cable is wound around a drive drum (drive rotator) provided in the drive unit, and the drive drum is rotated by a drive source such as an electric motor so that the sliding door is automatically opened and closed while being pulled by the cable. The cable type is known.

In the cable type automatic opening / closing device, since the moving path length of the cable changes when the sliding door is guided by the curved portion of the guide rail and pulled inside the vehicle body, the change of the moving path length is absorbed. A tensioner mechanism is required. For example, Patent Document 1 includes a pair of movable pulleys that are mounted on a tension case so as to be movable in a direction that moves toward and away from each other, and a coil spring that biases these movable pulleys toward each other, and is used for driving. A tensioner mechanism is described in which a cable drawn from a drum is hung on a corresponding movable pulley. In this case, each movable pulley is formed in a drum shape with a pulley groove on its outer periphery, and the cable drawn from the driving drum is stretched over the pulley groove to prevent detachment from the movable pulley. It is like that.
JP 2000-8708 A

  However, in the automatic opening / closing apparatus disclosed in Patent Document 1, the cable stretched around the movable pulley is always drawn to the center of the pulley groove by its tension, so that the cable from the drive drum is rotated along with the rotation of the drive drum. When the pulling position gradually moves in the axial direction, the cable is largely inclined with respect to the pulley groove, and there is a possibility that a rubbing sound is generated between the cable and the movable pulley. Further, in order to prevent the cable from being detached from the movable pulley, it is necessary to increase the width of the pulley groove. For this reason, the axial dimension of the movable pulley is increased, which hinders the downsizing of the drive unit.

  Therefore, a pulley holder that rotatably supports the movable pulley is mounted so as to be movable along the axial direction of the guide shaft and rotatable about the axis of the guide shaft, and the pulley holder is installed in a direction in which tension is applied to the cable. An automatic opening / closing device having a tensioner mechanism provided with a spring member for biasing has been proposed. Since this pulley holder is rotated with the movement of the pulling position of the cable from the driving drum, the cable is not greatly inclined with respect to the pulley groove, and a rubbing noise is generated between the cable and the movable pulley. It is not necessary to increase the width of the pulley groove, and the drive unit can be reduced in size.

  In the proposed automatic opening and closing device, the rotation range of the pulley holder is set wider than the position corresponding to the fully open position and the fully closed position of the slide door, and when the slide door is in the fully open position and the fully closed position, A clearance is set between the case. For this reason, when a strong vibration is applied to the automatic opening / closing device in the fully open position and the fully closed position, the pulley holder and the case may collide to generate a hitting sound. In addition, since a clearance is provided between the pulley holder and the case, and the rotation range of the pulley holder is set wider than necessary, the thickness of the case in the axial direction of the drive drum is increased, and the automatic opening / closing device is downsized. It becomes an obstacle.

  An object of the present invention is to provide an automatic opening / closing device for a vehicle that has both quietness and downsizing.

  An automatic opening and closing device for a vehicle according to the present invention is an automatic opening and closing device for a vehicle that automatically opens and closes an opening and closing body provided on a vehicle body, the case being disposed on either the vehicle body or the opening and closing body, and the case A drive rotator that is housed in the drive and is rotationally driven by a drive source, and a rope body that is wound around the drive rotator on one end side and is connected to the other of the vehicle body and the opening / closing body. And a tensioner mechanism that is accommodated in the case and applies a predetermined tension to the striated body, the tensioner mechanism being supported by the case along the guide shaft and along the guide shaft. A pulley holder that is mounted so as to be movable and rotatable about the axis of the guide shaft, a movable pulley that is rotatably supported by the pulley holder, and over which the strip is stretched, and the guide And a spring member that urges the pulley holder in a direction in which tension is applied to the strip body, and when the open / close body is in a fully open position and a fully closed position, the pulley holder is attached by the strip body. It is characterized by contacting the case in a biased state.

  The automatic opening / closing device for a vehicle according to the present invention is characterized in that the strip body is moved along a spiral guide groove formed on an outer peripheral surface of the driving rotating body along with the opening / closing movement of the opening / closing body. And

  In the vehicle automatic opening / closing device of the present invention, when the opening / closing body is in the fully open position, the pulley holder abuts on the case at one axial end side of the pulley holder in a state where the pulley holder is biased by the strip body, Is in the fully closed position, the pulley holder is in contact with the case on the other axial end side of the pulley holder while being urged by the cable body.

  In the automatic opening and closing device for a vehicle according to the present invention, the pulley holder contacts the case at a position before the fully opened position and the fully closed position of the opening and closing body, and when the opening and closing body is further opened and closed, the pulley holder It is urged by the strip in a direction to contact the case.

  According to the present invention, the pulley holder is brought into contact with the case in a state of being biased by the cable body under the fully open position and the fully closed position of the opening and closing body. Even if strong vibration is applied to the automatic opening and closing device for the vehicle, the pulley holder is in contact with the case, so that the pulley holder and the case do not collide and no sound is generated. Can be realized. In addition, since the pulley holder abuts the case at a position before the fully open position and the fully closed position, the thickness of the case in the axial direction of the driving drum is larger than when a clearance is provided between the pulley holder and the case. The dimensions can be reduced, and the automatic opening / closing device for a vehicle can be reduced in size.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a side view showing a one-box type vehicle equipped with an automatic opening / closing device for a vehicle according to an embodiment of the present invention, and FIG. 2 shows a structure for mounting the slide door shown in FIG. It is a top view.

  As shown in FIG. 1, a slide door 13 as an opening / closing body is provided on a side portion of a vehicle body 12 of the vehicle 11. A guide rail 14 is fixed to the side of the vehicle body 12, while a roller assembly 15 is provided on the slide door 13. The roller assembly 15 is guided by the guide rail 14, so that the slide door 13 is mounted on the vehicle body. 1 can be opened and closed in the vehicle front-rear direction between a fully closed position indicated by a solid line and a fully open position indicated by a two-dot chain line in FIG. Further, as shown in FIG. 2, a curved portion 14a that is curved toward the vehicle interior side is provided on the vehicle front side of the guide rail 14, and the roller assembly 15 is guided by the curved portion 14a, whereby the slide door 13 is provided. Is closed in a state of being pulled inside the vehicle body 12 so as to be in the same plane as the side surface of the vehicle body 12.

  Although not shown, the roller assembly 15 is also provided in the upper and lower portions (upper portion and lower portion) of the front end portion of the slide door 13 in addition to the portion (center portion) shown in the drawing, and the opening of the vehicle body 12 corresponding to these is provided. Guide rails (not shown) corresponding to the upper and lower portions are also provided in the upper and lower parts, and the slide door 13 is supported by the vehicle body 12 at a total of three locations.

  The vehicle 11 is provided with a vehicle automatic opening / closing device 21 (hereinafter referred to as an opening / closing device 21) in order to automatically open and close the slide door 13. The opening / closing device 21 includes a drive unit 22 disposed inside the vehicle body 12 adjacent to a substantially central portion of the guide rail 14 in the longitudinal direction of the vehicle, and a reversing pulley 23a provided at an end of the guide rail 14 on the vehicle rear side. An open side cable 24a as a striated body connected to the roller assembly 15 (slide door 13) from the open side (vehicle rear side), and a reverse pulley 23b provided at the end of the guide rail 14 on the vehicle front side. Via a closing side (vehicle front side) and a closing side cable 24b as a cable body connected to the roller assembly 15 (sliding door 13), and sliding by pulling the opening side cable 24a by the drive unit 22 The door 13 is automatically opened, and the sliding door 13 is automatically closed by pulling the closing cable 24b by the drive unit 22. It has become the jar.

  3 is a front view of the drive unit shown in FIG. 2, and FIG. 4 is a front view of the drive unit shown in FIG. 3 with its cover removed.

  As shown in FIGS. 3 and 4, the drive unit 22 includes a resin case 25 fixed to the vehicle body 12, and a motor unit 26 is attached to the case 25. The motor unit 26 comprises an electric motor 27 as a drive source and a speed reducer 28 as a single unit. The rotation of the electric motor 27 is reduced to a predetermined rotational speed by the speed reducer 28 and the output shaft 29 is reduced. Is output from.

  As the electric motor 27, for example, a motor that can rotate in both forward and reverse directions such as a DC motor with a brush is used. Further, an electromagnetic clutch (not shown) is provided inside the speed reducer 28. When the sliding door 13 is manually opened and closed, the electromagnetic clutch provides a power transmission path between the electric motor 27 and the output shaft 29. It is designed to be blocked.

  As shown in FIG. 4, the case 25 is provided with a substantially cylindrical drum storage chamber 25a, and the drum storage chamber 25a stores a drive drum 31 as a drive rotator. The output shaft 29 of the motor unit 26 protrudes into the drum housing chamber 25a, and the driving drum 31 is fixed to the output shaft 29 at its axis, and rotates with the output shaft 29 inside the drum housing chamber 25a. It has become.

  A spiral guide groove 31a (see FIG. 6) is formed on the outer peripheral surface of the drive drum 31, and the closed cable 24b guided by the drive unit 22 is wound around the drive drum 31 along the guide groove 31a. The end portion of the drive drum 31 is fixed to one end side in the axial direction (upper side in FIG. 6). Similarly, the open side cable 24a guided by the drive unit 22 is wound around the drive drum 31 in the same direction as the closed side cable 24b along the guide groove 31a, and the axial direction of the drive drum 31 and the like at the end thereof. It is fixed to the end side. That is, each cable 24a, 24b is wound around the driving drum 31 at one end and connected to the slide door 13 at the other end.

  A substrate housing chamber (not shown) is provided on the back side of the drum housing chamber 25a of the case 25. The substrate housing chamber has a control board (not shown) for controlling the operation of the electric motor 27 and the electromagnetic clutch. (Shown) is housed. The control board has a structure in which electronic components such as a CPU and a memory are mounted on the board, and is arranged in a power source such as a battery (not shown) mounted in the vehicle 11 or a vehicle interior via the connection connectors 32 and 33. It is connected to an open / close switch.

  When the opening / closing switch is operated by a driver or the like, the electric motor 27 is controlled by the control board to operate in a predetermined direction. When the electric motor 27 is operated, the rotation is transmitted to the output shaft 29 via the speed reducer 28 and the electromagnetic clutch, and the driving drum 31 is driven by the electric motor 27 and rotates together with the output shaft 29. When the driving drum 31 rotates, one of the cables 24a and 24b is wound around the driving drum 31 according to the rotation direction, and the slide door 13 is pulled and opened by the cables 24a and 24b. Further, by switching the operation direction of the opening / closing switch, the electric motor 27, that is, the driving drum 31 can be rotated forward and backward to operate the sliding door 13 in both the opening and closing directions.

  The case 25 is provided with a tensioner accommodating chamber 25b adjacent to the drum accommodating chamber 25a, and the open side cable 24a and the closed side cable 24b led to the drive unit 22 are respectively cable entry / exit portions 25c provided in the case 25. Is drawn into the tensioner storage chamber 25b and guided to the drum storage chamber 25a via the tensioner storage chamber 25b.

  The tensioner housing chamber 25b accommodates an open-side tensioner mechanism 34a for applying a predetermined tension to the open-side cable 24a and a closed-side tensioner mechanism 34b for applying a predetermined tension to the closed-side cable 24b. Even if the moving path lengths of the cables 24a and 24b change between the slide door 13 and the driving drum 31 due to the roller assembly 15 being guided by the curved portion 14a of the guide rail 14, etc. The tensions of the cables 24a and 24b are kept constant by the tensioner mechanisms 34a and 34b, so that the cables 24a and 24b do not become slack.

  In addition, flexible outer tubes 35a and 35b are connected between the cable entry / exit portions 25c of the case 25 and the reversal pulleys 23a and 23b. The cable entry / exit portions 25c and the reversal pulleys 23a and 23b are connected to each other. The cables 24a and 24b are inserted into the corresponding outer tubes 35a and 35b so as to move along the outer tubes 35a and 35b. Further, the case 25 includes a resin cover 36, and the drum storage chamber 25a and the tensioner storage chamber 25b are closed by the cover 36 as shown in FIG.

  Next, the tensioner mechanisms 34a and 34b will be described in detail. The open side tensioner mechanism 34a and the closed side tensioner mechanism 34b are symmetrical and have the same basic structure. Only the closing-side tensioner mechanism 34b will be described.

  FIG. 5 is a perspective view showing details of the tensioner mechanism, and the tensioner mechanism 34b includes a guide shaft 41 having a circular cross section formed in a predetermined length by a steel material or the like. As shown in FIG. 4, the guide shaft 41 is supported at the both ends by mounting grooves 25d provided in the case 25 and mounted inside the case 25, so that the tensioner mechanism 34b is connected to the driving drum of the drum housing chamber 25a. It is assembled at a position away from 31.

  A plastic pulley holder 42 is attached to the guide shaft 41. The pulley holder 42 includes a cylindrical slide portion 42a that is a mounting portion to the guide shaft 41, and a main body portion 42b that is formed integrally with the slide portion 42a. The pulley holder 42 extends along the guide shaft 41 in the slide portion 42a. The guide shaft 41 is supported so as to be movable in the axial direction and rotatable about the axis of the guide shaft 41. A stopper 43 is rotatably mounted on one end side of the guide shaft 41 (on the cable entry / exit portion 25c side), and a pair of stopper rings 44 are fixed to both end sides of the guide shaft 41. The stopper 43 and the stopper ring 44 are fixed. Thus, the movement range of the pulley holder 42 in the axial direction is restricted.

  The main body portion 42b of the pulley holder 42 is provided so as to be shifted toward the drum 31 with respect to the slide portion 42a. The main body portion 42b includes a pair of side wall portions 42c. A tensioner pulley 46 as a movable pulley is rotatably supported. The tensioner pulley 46 is formed in a disk shape having a pulley groove having a substantially V-shaped cross section, and the cable 24b drawn from the cable entry / exit portion 25c into the tensioner housing chamber 25b of the case 25 is stretched over the tensioner pulley 46. The moving direction of the tensioner pulley 46 is changed by approximately 180 degrees and guided to the drum 31.

  On the guide shaft 41, that is, between the stopper 43 of the guide shaft 41 and the slide portion 42a of the pulley holder 42, a spring 47 as a spring member made of a coil spring is mounted in a slightly compressed state. The pulley holder 42 is urged by the spring force of the spring 47 in a direction away from the stopper 43, that is, in a direction away from the cable entry / exit portion 25 c and the drum 31. As a result, the tensioner pulley 46 moves together with the pulley holder 42 in the direction of increasing the path length of the cable 24b to a position where the spring force of the spring 47 and the tension of the cable 24b are balanced, and a predetermined tension is applied to the cable 24b. It has become so.

  FIGS. 6A to 6C are explanatory views showing the rotation of the pulley holder when the sliding door is opened, and FIGS. 7A and 7B are views of the pulley holder when the sliding door is closed. It is explanatory drawing which shows rotation operation | movement.

  In the opening / closing device 21, when the opening / closing operation of the slide door 13 is performed and the driving drum 31 rotates, the drawing positions of the cables 24 a, 24 b from the driving drum 31 are in the spiral guide groove 31 a of the driving drum 31. Will move in the axial direction. Therefore, in the tensioner mechanisms 34a and 34b provided in the opening / closing device 21, the slide portion 42a of the pulley holder 42 is mounted on the guide shaft 41 so as to be rotatable around the axis of the guide shaft 41 as described above. Within a predetermined range, which will be described later, the tensioner pulley 46 is rotated in accordance with the pulling position of the cables 24a and 24b from the driving drum 31 in accordance with the movement of the pulling position of the cables 24a and 24b from the driving drum 31. I am doing so. For example, as shown in FIG. 6A, when the slide door 13 is at a substantially intermediate position between the fully open position and the fully closed position, that is, the drawing position of the closed cable 24b from the drive drum 31 is the drive drum. When the pulley holder 42 is rotated so that the axial center line a1 of the tensioner pulley 46 of the tensioner mechanism 34b on the closed side passes through the pulling position of the cable 24b from the driving drum 31, The axial center line a1 is moved and substantially coincides with the drawing direction line a2 of the cable 24b from the driving drum 31 (a straight line connecting the axis of the guide shaft 41 and the drawing position of the cable 24b from the driving drum 31). Thus, the inclination angle of the pulley holder 42 is set.

  When the sliding door 13 is opened, the cable 24b is pulled out from the driving drum 31, and the drawing position of the cable 24b from the driving drum 31 is axially along the guide groove 31a of the driving drum 31. It moves to one end side (side where the cable end of the cable 24b is fixed), and accordingly, the axial center line a1 of the tensioner pulley 46 passes through the position where the cable 24b is drawn from the driving drum 31, that is, The pulley holder 42 is rotated to the open side (one axial end side) so that the axial center line a1 substantially coincides with the pulling direction line a2 of the cable 24b from the driving drum 31. As shown in FIG. 6 (b), the pulley holder 42 comes into contact with the inner surface of the cover 36 at the side wall portion 42c on one end side in the axial direction, as shown in FIG. The rotation of the pulley holder 42 to the open side is restricted under the restriction position on the open side that becomes the axial center line a11.

  When the opening operation of the slide door 13 is further performed from the restriction position on the opening side of the pulley holder 42, that is, the position just before the fully opening position of the sliding door 13, the driving drum is held in the state where the pulley holder 42 is held at the restriction position on the opening side. The drawing position of the cable 24b from the driving drum 31 is moved to the one axial end side along the guide groove 31a of the driving drum 31, and the drawing direction line a2 of the cable 24b from the driving drum 31 is the axial center line of the tensioner pulley 46. It will shift to one axial end side from a11. Thus, the cable 24b is inclined toward one end in the axial direction with respect to the tensioner pulley 46, and the pulley holder 42 is brought into contact with the cover 36 while being urged toward one end in the axial direction by the cable 24b. As shown in FIG. 6C, when the slide door 13 is fully opened, the deviation between the pull-out direction line a21 of the cable 24b from the driving drum 31 and the axial center line a11 of the tensioner pulley 46 becomes the maximum. The pulley holder 42 is strongly urged toward one end in the axial direction by the cable 24b.

  Similarly, when the sliding door 13 is closed, the cable 24b is wound around the driving drum 31, and the drawing position of the cable 24b from the driving drum 31 is in the guide groove 31a of the driving drum 31. The pulley holder 42 is closed (in the axial direction and the like) so that the axial center line a1 of the tensioner pulley 46 passes through the position where the cable 24b is pulled out from the driving drum 31. It is turned to the end side. As shown in FIG. 7A, the pulley holder 42 comes into contact with the inner surface of the case 25 at the side wall portion 42c on the other end side in the axial direction as shown in FIG. The rotation of the pulley holder 42 toward the closing side is restricted under the restriction position on the closing side that becomes the axial center line a12 of the pulley 46.

  When the sliding door 13 is further closed from the closed position of the pulley holder 42, that is, the position before the fully closed position of the sliding door 13, the pulley holder 42 is held in the closed position for driving. The drawing position of the cable 24b from the drum 31 is moved to the other axial end side along the guide groove 31a of the driving drum 31, and the drawing direction line a2 of the cable 24b from the driving drum 31 is the axial direction of the tensioner pulley 46. It will shift | deviate to the axial direction other end side rather than the centerline a12. As a result, the cable 24b is inclined toward the other end in the axial direction with respect to the tensioner pulley 46, and the pulley holder 42 is brought into contact with the case 25 while being urged toward the other end in the axial direction by the cable 24b. As shown in FIG. 7B, under the fully closed position of the slide door 13, there is a deviation between the pulling direction line a22 of the cable 24b from the driving drum 31 and the axial center line a12 of the tensioner pulley 46. The pulley holder 42 is strongly biased toward the other end in the axial direction by the cable 24b.

  As described above, the pulley holder 42 of the tensioner mechanism 34b on the closed side is restricted from rotating on the open side by coming into contact with the cover 36 at one end in the axial direction, and to the case 25 at the other end in the axial direction. The rotation of the closed side is restricted by the contact, and the movable range α of the pulley holder 42 is such that the axial central axis a11 of the tensioner pulley 46 at the open-side restricted position and the axial central axis at the closed-side restricted position. It is regulated between a12. Within this movable range α, the pulley holder 42 is rotated so as to follow the pulling position as the cable 24b is pulled from the driving drum 31. As a result, even if the position where the cable 24b is pulled out from the driving drum 31 moves in the axial direction, the inclination of the cable 24b with respect to the tensioner pulley 46 is reduced, and a rubbing noise is generated between the tensioner pulley 46 and the cable 24b. Will be prevented. In addition, since the cable 24b is not greatly inclined with respect to the tensioner pulley 46, the axial dimension of the tensioner pulley 46 is reduced, and the size of the switchgear 21 is reduced.

  On the other hand, the movable range β of the drawing position of the cable 24b from the driving drum 31 is restricted between the drawing direction line a21 of the cable 24b from the driving drum 31 in the fully open position and the drawing direction line a22 in the fully closed position. The range is set wider than the movable range α of the pulley holder 42. Therefore, when the sliding door 13 is opened / closed to the fully open position and the fully closed position, the cable 24b is pulled out from the driving drum 31 in a state where the pulley holder 42 is held at each restricting position and the shaft is further rotated. As a result, the pulley holder 42 comes into contact with the case 25 (cover 36) while being urged by the cable 24b.

  6 and FIG. 7, the omitted open side cable 24a is wound around the guide groove 31a of the drum 31. The open side tensioner mechanism 34a is the same as the closed side tensioner mechanism 34b. Further, the case 25 is abutted against the cover 36 while being urged by the cable 24a under the fully open position of the slide door 13 and is urged by the cable 24a under the fully closed position of the slide door 13. It comes to contact | abut.

  As described above, since the pulley holder 42 is urged by the cables 24a, 24b under the fully open position and the fully closed position of the slide door 13, the case 25 (the cover 36) is brought into contact with it. Even when strong vibration is applied to the opening / closing device 21 under the fully closed position, the pulley holder 42 is in contact with the case 25, so that the pulley holder 42 and the case 25 collide with each other to generate a hitting sound. The silence of the automatic opening and closing device can be realized. In addition, since the pulley holder 42 is in contact with the case 25 at each restriction position, the thickness dimension of the case 25 in the axial direction of the driving drum 31 is larger than when a clearance is provided between the pulley holder 42 and the case 25. The opening / closing device 21 can be downsized.

  It goes without saying that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. For example, in the embodiment described above, the drive unit 22 is disposed inside the vehicle body 12 and the cables 24a and 24b are connected to the slide door 13. However, the present invention is not limited to this, and the drive unit 22 is connected to the slide door. It is good also as a structure arrange | positioned in 13 and fixing each cable 24a, 24b to the both ends of the guide rail 14 via the roller assembly 15 site | part of the slide door 13. FIG.

  In the embodiment, the electric motor 27 as a drive source is a DC motor with a brush. However, the present invention is not limited to this, and the drive drum 31 can be driven to rotate in both forward and reverse directions. For example, a brushless electric motor or the like may be used.

  Furthermore, in the above-described embodiment, the axial dimension of the tensioner housing chamber 25b is reduced so that the pulley holder 42 contacts the case 25 under the respective restricting positions. A protrusion may be provided on the inner surface of the pulley holder 42 so that the pulley holder 42 abuts against the protrusion under each restriction position.

1 is a side view showing a one-box type vehicle on which an automatic opening / closing device for a vehicle according to an embodiment of the present invention is mounted. It is a top view which shows the attachment structure to the vehicle body of the slide door shown in FIG. It is a front view of the drive unit shown in FIG. It is a front view of the state which removed the cover of the drive unit shown in FIG. It is a perspective view which shows the detail of a tensioner mechanism. (A)-(c) is explanatory drawing which shows rotation operation | movement of a tensioner pulley at the time of opening operation of a slide door, respectively. (A), (b) is explanatory drawing which shows rotation operation | movement of the pulley holder at the time of closing operation | movement of a slide door, respectively.

Explanation of symbols

11 Vehicle 12 Car body 13 Sliding door (opening / closing body)
14 guide rail 14a curved portion 15 roller assembly 21 automatic opening / closing device for vehicle 22 drive unit 23a, 23b reversing pulley 24a open side cable (strand body)
24b Closed cable (strand)
25 Case 25a Drum storage chamber 25b Tensioner storage chamber 25c Cable entry / exit portion 25d Mounting groove 26 Motor unit 27 Electric motor (drive source)
28 Reduction gear 29 Output shaft 31 Driving drum (rotating body for driving)
31a Guide groove 32, 33 Connector 34a Open side tensioner mechanism 34b Closed side tensioner mechanism 35a, 35b Outer tube 36 Cover 41 Guide shaft 42 Pulley holder 42a Slide portion 42b Body portion 42c Side wall portion 43 Stopper 44 Stopper ring 45 Support shaft 46 Tensioner pulley (movable pulley)
47 Spring (spring member)
a1 Axis centerline of tensioner pulley a11 Axis centerline of tensioner pulley at open restriction position a12 Axis centerline of tensioner pulley at close restriction position a2 Pull-out direction line of cable from drum a21 Drum at fully open position Cable drawing direction line a22 from the cable Pulling direction line of the cable from the drum in the fully closed position α Pulley holder movable range β Cable drawing position movable range of the drum

Claims (4)

An automatic opening and closing device for a vehicle that automatically opens and closes an opening and closing body provided on a vehicle body,
A case disposed on either the vehicle body or the opening and closing body;
A drive rotator housed in the case and driven to rotate by a drive source;
A cable body wound around the driving rotating body on one end side and connected to the other of the vehicle body or the opening / closing body at the other end;
A tensioner mechanism that is housed in the case and applies a predetermined tension to the cable body;
The tensioner mechanism is
A guide shaft supported by the case;
A pulley holder mounted on the guide shaft so as to be movable along the guide shaft and rotatable about the axis of the guide shaft;
A movable pulley that is rotatably supported by the pulley holder, and on which the strip is stretched;
A spring member attached to the guide shaft and biasing the pulley holder in a direction to apply tension to the cable body;
The automatic opening / closing apparatus for vehicles, wherein when the opening / closing body is in a fully open position and a fully closed position, the pulley holder abuts on the case in a state of being biased by the cable body.   2. The automatic opening / closing device for a vehicle according to claim 1, wherein the strip body is moved along a spiral guide groove formed on an outer peripheral surface of the driving rotating body along with opening / closing movement of the opening / closing body. An automatic opening and closing device for a vehicle.   3. The automatic opening / closing apparatus for a vehicle according to claim 1, wherein when the opening / closing body is in a fully open position, the pulley holder abuts on the case at one axial end side of the pulley holder while being urged by the cable body. When the opening / closing body is in a fully closed position, the pulley holder abuts against the case on the other axial end side of the pulley holder while being urged by the cable body.   The automatic opening and closing device for a vehicle according to any one of claims 1 to 3, wherein the pulley holder abuts the case at a position before the fully opened position and a fully closed position of the opening and closing body, and the opening and closing body is further opened and closed. When the vehicle is moved, the pulley holder is urged by the cord body in a direction to contact the case.

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