JP2009299343A - Automatic opening and closing device for vehicle and assembling method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To increase the efficiency of the work for winding a cable body around a driving drum stored in a main body case. <P>SOLUTION: A tip part of a driving shaft 34 supported rotatably in the case 25 by a bearing 33 protrudes into a drum storage chamber 31a, and a male screw part 55 is formed in the tip part of the driving shaft 34. The male screw part 55 is provided with a first male screw part 56 and a second male screw part 57, and a nut for fixing is screw-fitted into the second male screw part 57 while a female screw part 59a of the driving drum 41 and the first male screw part 56 are mutually screw-fitted to fix the driving drum 41 on the driving shaft 34. When winding a closing side cable 24b around a guide groove 41a of the driving drum 41, a part of the driving drum 41 is held at the position where it axially protrudes from outer peripheral walls 50a, 50b of the drum storage chamber 31a by mutual meshing of the first male screw part 56 and the female screw part 59a. <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 on a vehicle body and an assembling method thereof.

  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-type one in which a cable is wound around a drive drum provided in this drive unit, this drive drum is rotated by an electric motor (drive source), and the sliding door is automatically opened and closed while being pulled by the cable. It has been known.

As such an opening / closing device, for example, as disclosed in Patent Document 1, a main body case disposed on a vehicle body is provided, and a driving drum is rotatably accommodated in a drum housing chamber provided in the main body case. Things are known. In this case, the electric motor is attached to the main body case, and a drive shaft that is rotationally driven by the electric motor is rotatably supported by the main body case. On the other hand, the driving drum is provided with a boss portion, and the driving drum is attached to the tip of the driving shaft at the boss portion and is fixed to the driving shaft by a fastening member such as a nut. The drum housing chamber has a substantially cylindrical outer peripheral wall that covers the outer peripheral surface of the driving drum. The outer peripheral wall faces the outer peripheral surface of the driving drum with a gap equal to or less than the diameter of the cable. Thus, the cable is prevented from being detached from the driving drum and the cable is protected.
Japanese Patent Laid-Open No. 2005-83169

  In the opening / closing device disclosed in Patent Document 1, when the driving drum is fixed to the driving shaft, the outer peripheral surface thereof is covered with the outer peripheral wall of the main body case, so that the cable cannot be wound. Therefore, the winding operation of the cable around the driving drum is performed according to the following procedure.

  First, the cable end of either the open side cable or the closed side cable is fixed to the end surface of the drive drum, the cable is wound around the drive drum a predetermined number of times, and the drive drum is accommodated in the drum storage chamber in that state. And temporarily mounted on the drive shaft. Next, fix the cable end of the other cable to the end surface of the drive drum, and then hold the drive drum slightly pulled out of the drum storage chamber by hand, and drive the other cable a predetermined number of times in that state. Wrap around the drum. That is, when the other cable is wound around the driving drum, the driving drum is pulled out by hand so that a portion around which the cable is wound protrudes from the outer peripheral wall. Then, after the cable is wound, the driving drum is returned to the drum housing chamber and fixed to the driving shaft by a fastening member such as a nut.

  However, in such a method, when the other cable is wound, a step of pulling out the driving drum once accommodated in the drum accommodating chamber from the accommodating chamber is required. At this time, if the driving drum is pulled too far from the drum housing chamber, the cable that has been previously wound may be detached from the drum, and the winding operation is complicated.

  In consideration of workability when the other cable is wound around the driving drum, it may be possible to form a shape in which only a corresponding portion of the outer peripheral wall of the drum housing chamber is cut out. When the vehicle is fixed at a different position (the opening amount of the slide door), the winding amount of the cable also changes. Therefore, considering the versatility of the parts, it is difficult to change the shape of the main body case side.

  An object of the present invention is to improve the workability of winding a rope body around a driving drum housed in a main body case.

  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, and includes a case disposed on either the vehicle body or the opening and closing body, and one end portion And a drive drum that is rotatably supported by the case and rotationally driven by a drive source, and a female screw portion that is screwed into the male screw portion of the drive shaft. And the female screw portion of the driving shaft and the male screw portion of the driving shaft are screwed to the male screw portion of the driving shaft under the state where the female screw portion and the male screw portion of the driving shaft are screwed to a specified position. A nut member for fixing the drive shaft, a strip wound around the drive drum on one end side, and the other end connected to either the vehicle body or the opening / closing body, and the drive shaft fixed to the drive shaft At least in the circumferential direction of the drum An outer peripheral wall provided on the case so as to correspond to a part and covering an outer peripheral surface of the driving drum, and when winding the cable body around the driving drum, a position in front of the predetermined position The drive drum is held at a position where a part of the drive drum protrudes in the axial direction from the outer peripheral wall by meshing with the external thread portion of the drive shaft and the internal thread portion of the drive drum screwed to each other. It is characterized by that.

  In the automatic opening / closing device for a vehicle according to the present invention, the external thread portion of the drive shaft has a first external thread portion that engages with the internal thread portion of the drive drum, and a second external thread portion that engages with the nut member. The second male screw portion is formed to have a smaller diameter than the first male screw portion.

  The automatic opening / closing device for a vehicle according to the present invention is characterized in that the first male screw portion and the second male screw portion have different pitches.

  The automatic opening / closing device for a vehicle according to the present invention is characterized in that the female thread portion of the driving drum has a plurality of threads.

  An assembly method for an automatic opening / closing device for a vehicle according to the present invention is an assembly method for an automatic opening / closing device for a vehicle that automatically opens and closes an opening / closing body provided on a vehicle body by pulling a pair of cable bodies. A pair of cords is prepared in which a male screw part is formed in the part and a drive shaft that is rotationally driven by a drive source protrudes into a drum housing chamber having an outer peripheral wall that covers the drive drum. Fixing one end of the strip to one end of a driving drum having a female screw portion screwed into the male screw portion of the driving drum, and winding the driving drum a predetermined number of times; The internal thread portion of the drive drum is screwed into the external thread portion of the drive shaft from the side around which the cable body is wound until a part of the other end side of the drum is protruded in the axial direction from the outer peripheral wall. Process and the pair of cords Fixing the other end of the body to the other end of the driving drum and winding the driving drum around the driving drum a predetermined number of times, and a female screw of the driving drum in a state in which the pair of strips are wound And a nut member is screwed into the male screw portion of the drive shaft, and a nut member is screwed into the male screw portion of the drive shaft. And a step of fixing the driving drum.

  According to the present invention, the drive shaft is provided with the external thread portion, the internal thread portion to be screwed to the external thread portion is provided in the drive drum, and when winding the strip body around the drive drum, the external thread portion and the internal thread portion Since the drive drum is held at a position where a part of the drive drum protrudes in the axial direction from the outer peripheral wall by the meshing of the drive drum, there is no need to hold the drive drum by hand. Winding work can be facilitated.

  According to the present invention, since the male screw portion of the drive shaft is constituted by the first male screw portion and the second male screw portion having a smaller diameter than the first male screw portion, the degree of freedom is increased in how to cut the thread of each male screw portion. be able to. Further, according to the present invention, since the pitch between the first male screw portion and the second male screw portion is made different, the nut member is prevented from loosening together with the driving drum, and the driving drum is detached from the driving shaft at the time of rotational driving. Is reliably prevented.

  According to the present invention, since the female thread portion is a plurality of thread threads, the load applied to each screw thread is reduced, the durability of the male thread portion and the female thread portion is improved, and the thickness dimension thereof can be reduced. .

  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, and FIG. 2 is a top view showing a structure for mounting the slide door shown in FIG.

  A slide door 13 as an opening / closing body is provided on the side of the vehicle body 12 of the one-box type vehicle 11 shown in FIG. The sliding door 13 is guided by a guide rail 14 fixed to the side of the vehicle body 12, and can be opened and closed between a fully closed position indicated by a solid line and a fully open position indicated by a two-dot chain line in FIG. When passengers get on and off and load and unload luggage, they are opened to a desired opening.

  As shown in FIG. 2, the slide door 13 is provided with a roller assembly 15, and the roller assembly 15 is guided by the guide rail 14 so that the slide door 13 is movable in the front-rear direction of the vehicle 11. . In addition, 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 when the roller assembly 15 is guided to the curved portion 14a, the slide door 13 is flush with the side surface of the vehicle body 12. Thus, it is closed in a state of being drawn inside 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 with the drive unit 22 The door 13 is automatically opened, and the sliding door 13 is automatically closed by pulling the closing cable 24b with the drive unit 22. That.

  3 is a front view showing details of the drive unit shown in FIG. 2, and FIG. 4 is a cross-sectional view taken along the line AA in FIG.

  As shown in FIGS. 3 and 4, the drive unit 22 is provided with a resin case 25 disposed on the vehicle body 12, and the case 25 includes a substantially cylindrical reduction mechanism housing portion 26. An electric motor 27 as a drive source is attached to the outside of the unit 26. The electric motor 27 has a rotating shaft 27a that can rotate in both forward and reverse directions, such as a DC motor with a brush, and is fixed to the case 25 by a bolt (fastening member) 28 at a portion of the motor yoke 27b. . As shown in FIG. 4, a speed reduction mechanism accommodation chamber 26 a is provided inside the speed reduction mechanism accommodation portion 26, and the rotating shaft 27 a of the electric motor 27 projects into the speed reduction mechanism accommodation chamber 26 a.

  The case 25 is provided with a drum accommodating portion 31 as an accommodating portion for the driving rotator integrally with the speed reduction mechanism accommodating portion 26. The drum accommodating portion 31 is formed in a substantially cylindrical shape that opens to the opposite side to the speed reduction mechanism accommodating portion 26, and the inside thereof is a drum accommodating chamber 31a. As shown in FIG. 4, the drum accommodating chamber 31a and the speed reducing mechanism are provided. The storage chamber 26 a is partitioned by a partition wall 32. A support hole 32 a is formed in the partition wall 32, and a bearing 33 is mounted in the support hole 32 a, and the drive shaft 34 is rotatably supported by the case 25 by the bearing 33. One end of the drive shaft 34 projects into the speed reduction mechanism accommodation chamber 26a, and the other end projects into the drum accommodation chamber 31a.

  In order to decelerate the rotation of the rotation shaft 27a to a predetermined rotation number and transmit it to the drive shaft 34, a reduction mechanism 35 is accommodated in the reduction mechanism accommodation chamber 26a. The speed reduction mechanism 35 is a worm gear mechanism including a worm 35a and a worm wheel 35b as a rotating body. The worm 35a is formed integrally with the rotary shaft 27a on the outer peripheral surface of the rotary shaft 27a, and the worm wheel 35b is driven. The shaft 34 is supported so as to be relatively rotatable, and is rotatable within the case 25.

  As shown in FIG. 4, the speed reduction mechanism accommodating portion 26 of the case 25 is provided with a clutch accommodating chamber 26b integrally with the speed reducing mechanism accommodating chamber 26a. The clutch accommodating chamber 26b includes a worm wheel 35b and a drive shaft 34. In order to intermittently transmit power between the motor 27 and the electric motor 27 and the drive shaft 34, an electromagnetic clutch 37 serving as a power interrupting mechanism is accommodated. The electromagnetic clutch 37 is of a so-called friction type, and is energized via the connection wiring 37a to be connected to enable transmission of power between the worm wheel 35b and the drive shaft 34. Therefore, when the electric motor 27 is operated when the electromagnetic clutch 37 is energized, the rotation of the rotary shaft 27a is transmitted to the drive shaft 34 via the speed reduction mechanism 35 and the electromagnetic clutch 37, and the drive shaft 34 is warm wheel. Rotates with 35b. On the other hand, when the energization is stopped, the electromagnetic clutch 37 is cut off, and the power transmission path between the worm wheel 35b and the drive shaft 34 is cut off.

  As shown in FIGS. 3 and 4, the drum storage chamber 31 a stores a drive drum 41 as a drive rotator. The drive drum 41 is formed of a resin material in a cylindrical shape, and is fixed to the tip of the drive shaft 34 at the axis thereof so as to be rotatable inside the case 25. A spiral guide groove 41a is formed on the outer peripheral surface of the drive drum 41, and the open side cable 24a guided by the drive unit 22 is wound around the drive drum 41 along the guide groove 41a and its end portion In FIG. Similarly, the closed cable 24b guided by the drive unit 22 is wound around the drive drum 41 in the same direction as the open cable 24a along the guide groove 41a, and is fixed to the drive drum 41 at its end. . That is, each cable 24a, 24b is wound around the driving drum 41 at one end side and connected to the slide door 13 at the other end. When the electric motor 27 is operated, the rotation is transmitted to the drive shaft 34 via the speed reduction mechanism 35 and the electromagnetic clutch 37, and the driving drum 41 is driven by the electric motor 27 together with the drive shaft 34 to rotate. When the driving drum 41 rotates, one of the cables 24a and 24b is wound around the driving drum 41 according to the rotation direction, and the sliding door 13 is pulled and opened by the cables 24a and 24b.

  The case 25 is provided with a tensioner accommodating portion 42 adjacent to the drum accommodating portion 31 integrally with the drum accommodating portion 31 and the speed reduction mechanism accommodating portion 26. The tensioner accommodating portion 42 is formed in a bathtub shape that opens in the same direction as the drum accommodating portion 31, and the inside thereof is a tensioner accommodating chamber 42a as shown in FIG. The tensioner accommodating portion 42 is provided with a pair of cable entry / exit portions 43a and 43b for drawing the cables 24a and 24b into the tensioner accommodation chamber 42a. The open side cable 24a and the close side cable 24b are respectively connected to the corresponding cable entry / exit portions 43a and 43a. 43b is drawn into the tensioner storage chamber 42a and guided to the drum storage chamber 31a via the tensioner storage chamber 42a. As shown by a broken line in FIG. 3, a pair of tensioner mechanisms 44a and 44b as necessary devices are accommodated in the tensioner accommodating chamber 42a, and each cable 24a and 24b has a predetermined tension by the tensioner mechanisms 44a and 44b. Is granted. Thus, even if the roller assembly 15 is guided by the curved portion 14a of the guide rail 14 and the movement path length of the cables 24a and 24b changes between the slide door 13 and the driving drum 41, each cable The tensions 24a and 24b are kept constant. Further, a cover 45 is attached to the tensioner accommodating portion 42, and the tensioner accommodating chamber 42 a is closed by the cover 45 so that the tensioner mechanisms 44 a and 44 b are covered with the cover 45.

  The case 25 is provided with a substrate housing portion 46 integrally with the speed reduction mechanism housing portion 26, the drum housing portion 31, and the tensioner housing portion 42. The substrate housing portion 46 is formed in a box shape that is located on the back side of the tensioner housing portion 42 and opens in a direction shifted by 90 degrees with respect to the openings of the speed reduction mechanism housing chamber 26a and the clutch housing chamber 26b. A substrate housing chamber 46a is formed. In order to control the operation of the electric motor 27 and the electromagnetic clutch 37, a control board 47 as a required device is housed in the board housing chamber 46a. The control board 47 has a structure in which a control circuit including an electronic component 47b such as a CPU and a memory is mounted on a resin board body 47a, and connection terminals and the like (not shown) routed inside the case 25. To the electric motor 27. The board housing chamber 46 a is closed by a board cover 48, and a connection connector 49 connected to the control board 47 is provided on the board cover 48, and the control board 47 is connected to the vehicle 11 via the connection connector 49. It is connected to a power source such as a battery (not shown) to be mounted, an open / close switch disposed in the vehicle compartment, and the like.

  Next, the assembly structure of the drive drum 41 will be described in detail. FIG. 5 is a cross-sectional view of the driving drum under a normal fixing position, and FIG. 6 is a cross-sectional view of the driving drum under a winding position.

  As shown in FIGS. 3 and 5, the drum storage chamber 31a is partitioned and formed by a partition wall 32 and a pair of semi-cylindrical outer peripheral walls 50a and 50b that project from the partition wall 32 in the axial direction. Between the outer peripheral walls 50a and 50b are cable lead-out portions 51a and 51b. The open-side cable 24a is fixed to a locking portion 53a formed on an end surface of the driving drum 41 on the partition wall 32 side at a cable end 52a provided at the end thereof, and is driven along the guide groove 41a from the end surface side. While being wound around the drum 41, it is guided to the tensioner mechanism 44a via the cable lead portion 51a. Similarly, the closed cable 24b is fixed to a locking portion 53b formed on an end surface on the opening side of the driving drum 41 at a cable end 52b provided at the end thereof, along the guide groove 41a from the end surface side. While being wound around the driving drum 41, it is guided to the tensioner mechanism 44b via the cable lead portion 51b.

  The outer peripheral surface of the driving drum 41 is covered with outer peripheral walls 50a and 50b except for the positions where the cable lead portions 51a and 51b are formed, and the cables 24a and 24b are protected from contact with foreign matter. Further, the distance between the outer peripheral surface of the driving drum 41 and the inner surfaces of the outer peripheral walls 50a and 50b is equal to or less than the diameter of the cables 24a and 24b, and the cables 24a and 24b wound around the driving drum 41 have the outer peripheral wall 50a. , 50b is held inside the guide groove 41a and is prevented from being detached from the driving drum 41.

  In the present embodiment, the outer peripheral walls 50a and 50b are formed so as to cover the outer peripheral surface of the driving drum 41 in a range excluding the formation positions of the cable lead portions 51a and 51b. Instead, the size and shape of the outer peripheral walls 50a and 50b can be arbitrarily set as long as they are provided so as to correspond to at least a part of the driving drum 41 in the circumferential direction.

  As shown in FIG. 5, the drive shaft 34 is rotatably supported by the case 25 by a bearing 33 with its tip end (end on the drive drum 41 side) protruding into the drum housing chamber 31 a. A male screw portion 55 is formed in the portion of the drive shaft 34 protruding into the drum accommodating chamber 31a. The male screw portion 55 is provided adjacent to the first male screw portion 56 provided at a substantially central portion in the axial direction of the drum housing chamber 31a and the front end side (upper side in the drawing) of the first male screw portion 56. The second male screw portion 57 is formed with a smaller diameter than the first male screw portion 56, and the male screw portions 56, 57 are formed with different pitches. Thus, by forming the second male screw portion 57 to have a smaller diameter than the first male screw portion 56, the degree of freedom increases in how to cut the thread of each male screw portion 56, 57, and the pitch of each male screw portion 56, 57. Can be formed differently.

  The inner side in the radial direction of the driving drum 41 is thinner than the outer peripheral surface on which the guide groove 41a is formed, and a support portion 32b that supports the bearing 33 is provided on the end surface of the driving drum 41 on the partition wall 32 side. A recessed portion 58a is formed, and on the other hand, a recessed portion into which a tool or the like is inserted when an after-mentioned fixing nut 60 is screwed into the second male threaded portion 57 of the drive shaft 34 is formed on the opening end surface of the driving drum 41. 58b is formed. A mold nut 59 is embedded in the shaft center of the drive drum 41. The mold nut 59 has a female screw portion 59a that is screwed into the first male screw portion 56 of the drive shaft 34, and the female screw portion 59a has a first screw thread. The drive drum 41 is attached to the tip end of the drive shaft 34 by screwing the one male screw portion 56. The first male screw portion 56 and the female screw portion 59a are two-threaded screws, thereby reducing the load on each screw thread and improving the durability of the first male screw portion 56 and the female screw portion 59a. The thickness dimension can be reduced. In addition, although a single thread may be used as the 1st male thread part 56 and the female thread part 59a, in order to show the said effect, it is preferable that it is a multiple thread with a several thread.

  When the first male screw portion 56 is completely screwed into the female screw portion 59a until the predetermined position where the female screw portion 59a of the mold nut 59 contacts the formed end surface 34a of the male screw portion 55 of the drive shaft 34, the driving drum 41 is accommodated in the drum. All are accommodated in the chamber 31a and positioned at a regular fixed position shown in FIG. Under the fixed position, the second male threaded portion 57 of the drive shaft 34 protrudes into the recess 58 b, and the fixing nut 60 is screwed into the second male threaded portion 57, so that the opening side of the mold nut 59 is open. The driving drum 41 is fixed to the distal end portion of the drive shaft 34 by the fixing nut 60 coming into contact with the end surface. That is, the looseness between the first male screw portion 56 and the female screw portion 59a is suppressed by the fixing nut 60, and the driving drum 41 is fixed at the regular fixing position. Here, since the pitches of the first male screw portion 56 and the second male screw portion 57 are different, the fixing nut 60 is prevented from loosening together with the mold nut 59, and the driving drum 41 is removed from the driving shaft 34 during rotation. It is reliably prevented from leaving.

  FIG. 6 shows a state before the fixing nut 60 is screwed to the second male screw portion 57, and the driving drum 41 is rotated once counterclockwise in FIG. 3 from the regular fixing position shown in FIG. The state where the screwing of the female thread part 59a of the mold nut 59 and the first male thread part 56 of the drive shaft 34 is loosened by one rotation is shown. The driving drum 41 is inserted into the drum accommodating chamber 31a with the open cable 24a wound around the guide groove 41a, and then the closed cable 24b is wound around the guide groove 41a. The winding operation of the closed cable 24b is performed at the winding position shown in FIG. A part of the opening side of the driving drum 41 under the winding position when winding the closed cable 24b is projected in the axial direction with respect to the outer peripheral walls 50a and 50b, and a position before the specified position. The first threaded portion 56 of the drive shaft 34 and the threaded portion 59a of the drive drum 41 are held at the winding position by meshing with each other.

  This winding position is a position where the closed cable 24b is wound once around the guide groove 41a protruding in the axial direction from each of the outer peripheral walls 50a, 50b, and the distance M between the regular fixing position and the winding position. Corresponding to the above, a lead (distance that advances in the axial direction when the screw is rotated once) L of the first male screw portion 56 and the female screw portion 59a is set. That is, the driving drum 41 is moved from the fixed position to the winding position by rotating the driving drum 41 once and loosening the screwing of the female threaded portion 59a and the first male threaded portion 56 to a position before the specified position. The closed cable 24b can be wound around the guide groove 41a.

  Next, a procedure for winding the cables 24a and 24b around the driving drum 41 in the opening / closing device 21 of the present invention will be described.

  First, the cable end 52a of the open side cable 24a is fixed to the engaging portion 53a of the drive drum 41, and the open side cable 24a is driven a predetermined number of times along the guide groove 41a from the end surface of the drive drum 41 on the partition wall 32 side. Wrap around the drum 41. Next, the drive drum 41 with the open side cable 24a wound is inserted into the drum housing chamber 31a from the axial direction, and the drive shaft 41 is positioned until the drive drum 41 is positioned at the winding position when the closed side cable 24b is wound. The first male screw portion 56 of 34 and the female screw portion 59a of the mold nut 59 are screwed together. At this time, the open side cable 24a wound around the driving drum 41 is drawn out of the drum housing chamber 31a from the cable drawing portion 51a. When the first male screw portion 56 and the female screw portion 59a are screwed to a position before the specified position, the drive drum 41 is engaged by the engagement of the first male screw portion 56 and the female screw portion 59a as shown in FIG. The winding position is held in front of the regular fixing position.

  In the driving drum 41 under this winding position, one turn of the cable in the guide groove 41a protrudes in the axial direction from the outer peripheral walls 50a and 50b and is exposed to the outside. The cable end 52b is fixed to the locking portion 53b of the driving drum 41, and the cable 24b is wound around the guide groove 41a protruding from the outer peripheral walls 50a and 50b. As described above, when the operation of winding the closed cable 24b around the driving drum 41 is performed, the driving drum 41 is held at the winding position by the engagement of the first male screw portion 56 and the female screw portion 59a, and the guide groove 41a. Is protruded in the axial direction from the outer peripheral walls 50a, 50b, so that it is not necessary for the operator to hold the driving drum 41 in a state of being pulled out from the drum housing chamber 31a by hand, and the cable to the driving drum 41 The winding work of 24a, 24b becomes easy.

  When the closed cable 24b is wound around the drive drum 41, the female screw portion 59a and the first male screw portion 56 are further moved to a specified position where the female screw portion 59a contacts the formation end surface 34a of the male screw portion 55 of the drive shaft 34. The drive drum 41 is attached to the tip end portion of the drive shaft 34 and is brought into the regular fixed position shown in FIG. Under this regular fixing position, the fixing nut 60 is screwed into the second male threaded portion 57 of the drive shaft 34 protruding into the recess 58b, and the fixing nut 60 contacts the end surface of the mold nut 59 on the opening side. By contacting, the driving drum 41 is fixed to the tip end portion of the driving shaft 34.

  As described above, in the opening / closing device 21, the first male screw portion 56 is provided on the drive shaft 34, and the female screw portion 59 a that is screwed to the first male screw portion 56 is provided on the driving drum 41, and is closed on the driving drum 41. When the side cable 24b is wound, the driving drum 41 is held in a winding position in which a part of the driving drum 41 protrudes in the axial direction from the outer peripheral walls 50a, 50b by the meshing of the female screw portion 59a and the first male screw portion 56. Thus, it is not necessary to hold the driving drum 41 by hand, and the winding work of the cables 24a and 24b around the driving drum 41 can be facilitated.

  In this embodiment, the winding position of the driving drum 41 is a position where the closed cable 24b is wound around the guide groove 41a protruding in the axial direction from the outer peripheral walls 50a and 50b. Since the drum 41 is held by meshing between the first male screw portion 56 and the female screw portion 59a, the winding position depends on the number of windings of the cables 24a, 24b and the like, and the first male screw portion 56 and the female screw portion 59a. Can be set at an arbitrary position in the range where the meshes engage with each other.

  Further, by causing the lead L of the first male screw portion 56 and the female screw portion 59a to correspond to the distance M between the normal fixing position and the winding position, the drive drum 41 is rotated once to make the lead L normal from the winding position. Although it can be moved to the fixed position and the maintenance workability such as replacement of the cables 24a and 24b is improved, the lead L of the first male screw part 56 and the female screw part 59a is not necessarily wound around the normal fixed position. Of course, it is not necessary to correspond to the distance M between the positions.

  Furthermore, the outer diameters, pitches, and the like of the male screw portions 56 and 57 and the nuts 59 and 60 can be arbitrarily set. However, the second male screw portion 57 preferably has a smaller diameter than the first male screw portion 56, and the size thereof can withstand the tensile stress generated in the drive shaft 34 in an attempt to rotate the mold nut 59 during rotational driving. To do.

  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 present embodiment, the opening / closing body is a sliding door 13 that opens and closes in a sliding manner. However, the present invention is not limited to this, and a hinged lateral opening door for getting on and off or a back door provided at the rear end of the vehicle. Other opening / closing bodies may be used. Further, the open side cable 24 a may be wound around the opening side of the driving drum 41 and the closed side cable 24 b may be wound around the partition wall 32 side of the driving drum 41. Furthermore, the case 25 may be disposed on the slide door 13 and the other ends of the cables 24a and 24b wound around the drive drum 41 at one end may be connected to the vehicle body.

It is a side view showing a one-box type vehicle. 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 which shows the detail of the drive unit shown in FIG. It is sectional drawing which follows the AA line in FIG. It is sectional drawing of the drum for a drive in the regular fixed position. It is sectional drawing of the drum for a drive in the winding position.

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 26 Deceleration mechanism accommodation portion 26a Deceleration mechanism accommodation chamber 26b Clutch accommodation chamber 27 Electric motor (drive source)
27a Rotating shaft 27b Motor yoke 28 Bolt 31 Drum accommodating portion 31a Drum accommodating chamber 32 Partition 32a Support hole 32b Supporting portion 33 Bearing 34 Drive shaft 34a Forming end surface 35 Deceleration mechanism 35a Worm 35b Worm wheel (rotating body)
36 Clutch storage chamber 37 Electromagnetic clutch (power intermittent mechanism)
37a Connection wiring 41 Driving drum 41a Guide groove 42 Tensioner accommodating portion 42a Tensioner accommodating chambers 43a and 43b Cable entry / exit portions 44a and 44b Tensioner mechanism 45 Cover 46 Substrate accommodating portion 46a Substrate accommodating chamber 47 Control substrate 47a Substrate body 47b Electronic component 48 Board cover 49 Connector 50a, 50b Outer peripheral wall 51a, 51b Cable lead-out part 52a, 52b Cable end 53a, 53b Locking part 55 Male thread part 56 First male thread part 57 Second male thread part 58a, 58b Recessed part 59 Mold nut 59a Female thread part 60 Locking nut

Claims (5)

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 shaft provided with an external thread at one end, rotatably supported by the case, and driven to rotate by a drive source;
A driving drum provided with an internal thread portion screwed into an external thread portion of the drive shaft at the shaft center;
With the female screw portion of the drive drum and the male screw portion of the drive shaft screwed to a specified position, the drive drum is screwed to the male screw portion of the drive shaft, and the drive drum is fixed to the drive shaft. A nut member to be
A cable body wound around the driving drum on one end side and connected to the other side of the vehicle body or the opening / closing body at the other end;
An outer peripheral wall provided in the case corresponding to at least a part of the circumferential direction of the driving drum fixed to the driving shaft, and covering an outer peripheral surface of the driving drum;
When the strip is wound around the driving drum, the driving drum is engaged by engagement between the male screw portion of the driving shaft and the female screw portion of the driving drum that are screwed to a position before the predetermined position. An automatic opening / closing device for a vehicle, characterized in that the driving drum is held at a position where a part of the driving drum protrudes axially from the outer peripheral wall.   2. The automatic opening / closing device for a vehicle according to claim 1, wherein the external thread portion of the drive shaft includes a first external thread portion that engages with an internal thread portion of the drive drum, and a second external thread portion that engages with the nut member. And an automatic opening / closing device for a vehicle, wherein the second male screw portion is formed to have a smaller diameter than the first male screw portion.   The automatic opening / closing device for a vehicle according to claim 2, wherein the first male screw portion and the second male screw portion have different pitches.   The automatic opening and closing device for a vehicle according to any one of claims 1 to 3, wherein the female screw portion of the driving drum has a plurality of threads. An assembly method of an automatic opening / closing device for a vehicle that automatically opens and closes an opening / closing body provided on a vehicle body by pulling a pair of cable bodies,
A case is prepared in which a male screw portion is formed at one end and a drive shaft that is rotationally driven by a drive source projects in a drum housing chamber having an outer peripheral wall that covers the drive drum,
Fixing one end of the pair of ropes to one end of a driving drum having a female screw portion screwed to the male screw portion of the driving drum, and winding the driving drum a predetermined number of times; When,
Screw the female threaded portion of the driving drum into the male threaded portion of the drive shaft from the side around which the strip is wound until a part of the other end side of the drive drum protrudes axially from the outer peripheral wall. Combining steps;
Fixing the other end of the pair of ropes to the other end of the driving drum, and winding the driving drum a predetermined number of times;
Screwing the female screw portion of the driving drum and the male screw portion of the driving shaft in a state where the pair of strips are wound to a specified position, and storing the driving drum in the drum housing chamber;
A method of assembling the automatic opening / closing device for a vehicle, comprising: a step of screwing a nut member into a male screw portion of the drive shaft, and fixing the drive drum to the drive shaft.

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