JP2014062360A - Opening/closing drive unit of opening/closing body, and window regulator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress looseness of a cable in a state that a movable body is positioned at a movement end, and to make movement of the movable body smooth when the movable body moves from one movement end to the other movement end.SOLUTION: When a drum is rotated in a forward direction in a state that a movable body is positioned at one movement end, a cable feeding amount of a first cable fed from the drum is made to decrease compared with a cable taking-up amount of a second cable taken-up on the drum. Therefore, the first cable can be prevented from being loosened at one movement end, and opening/closing operation of an opening/closing body can be made smooth when the movable body moves from one movement end to the other movement end.

Description

  The present invention relates to an opening / closing body opening / closing drive device for opening / closing an opening / closing body and a window regulator using the opening / closing body opening / closing drive device.

  For example, in order to open and close an opening / closing body such as a sliding door or window glass of an automobile, an apparatus for moving the opening / closing body in an opening / closing direction by an opening direction driving cable and a closing direction driving cable is known. In such a device, the open direction drive cable and the close direction drive cable are wound around the drum in opposite directions, and the opening / closing body is driven to open and close by the rotation of the drum in the forward direction or the reverse direction.

  Patent document 1 is mentioned as an example of the above apparatuses. The device described in Patent Document 1 is a cable winding drum device that opens and closes a sliding door as an opening / closing body that slides a guide rail having a straight portion and a curved portion, and a part of a spiral groove provided in the drum. By changing the diameter, the slack that occurs when the sliding door passes through the curved portion is absorbed.

JP 2008-68643 A

  By the way, in the window regulator that opens and closes the window glass of the vehicle using the apparatus as described above, the rising end of the carrier plate fixed to the window glass or the lowering of the carrier plate that restricts the movement of the carrier plate in the rising direction. When the carrier plate reaches the descending movement end that restricts the movement in the direction and stops moving in the ascending or descending direction, the drum further rotates and the cable sent out from the drum becomes slack. There is.

  Then, when the sent cable is loosened, when starting the movement of the carrier plate from the ascending movement end to the descending movement end or from the descending movement end toward the ascending movement end, backlash, judder, time lag, etc. occur, There is a possibility that the window glass cannot be moved up and down smoothly. In particular, at the ascending movement end, if the fed-out cable is slack, the window glass may fall by its own weight before the window glass is moved in the descending direction.

  Similarly, in a device that opens and closes an opening / closing body such as a power slide door, the same looseness may occur at the moving end where the opening and closing movement of the slide door is restricted, which may hinder smooth opening and closing of the slide door. is there.

  Therefore, the present invention suppresses the slack of the cable when the moving body is located at one moving end, and smoothly moves the opening / closing body when the opening / closing body moves from one moving end to the other moving end. The purpose is to do.

  In order to achieve the above object, an opening / closing body opening / closing drive device of the present invention includes a drive unit that opens and closes an opening / closing body, and a drum that has a spiral continuous groove on an outer peripheral surface thereof, and is rotated by the driving force of the drive unit. A moving body that is connected to the opening and closing body and moves in the moving direction of the opening and closing body, and a first cable and a second cable that are connected to the moving body, wound around the drum in opposite directions, and sent out. An opening / closing body opening / closing drive device for moving the moving body in the opening / closing body movement direction by winding and sending out the first cable and the second cable by rotation of the drum, and driving the opening / closing body to open / close. The moving body is movable between one moving end and the other moving end where movement of the moving body in the opening direction and the closing direction is restricted, and the drum is connected to the second cable. Winding up The moving body is moved from the other moving end to the one moving end by rotating the drum in the positive direction which is the direction in which the first cable is sent out, the first cable is wound up, and the second cable In the state where the movable body is moved from the one moving end to the other moving end by rotating the drum in the reverse direction which is the direction of feeding out, the moving body is located at the one moving end. When the drum is rotated in the positive direction, the cable feed amount of the first cable fed from the drum is reduced with respect to the cable winding amount of the second cable wound around the drum. It is characterized by becoming.

  (1) According to the opening / closing body opening / closing drive device of the present invention, when the moving body is positioned at one moving end, when the drum is rotated in the forward direction, the second cable is wound around the drum. Since the cable feed amount of the first cable fed from the drum is reduced with respect to the take-off amount, the first cable can be prevented from slackening at one moving end, and the moving body moves from one moving end to the other. The opening / closing operation of the opening / closing body when moving to the end can be made smooth.

  (2) According to the opening / closing body opening / closing drive device of the present invention, the first cable having a length within a predetermined range from the drum-side end portion of the first cable attached to the first cable attachment portion provided in the drum. However, the first cable feed amount, which is the amount by which the first cable is fed from the drum by the rotation of the drum, is less than the second cable winding amount, which is the amount by which the second cable is wound around the drum. Since the slack can be suppressed by a predetermined range length from the end of the first cable attached to the first cable attachment portion of the drum, the moving body is positioned at one moving end. Can be more reliably suppressed, and the opening / closing operation of the opening / closing body can be made smoother.

  (3) According to the opening / closing body opening / closing drive device of the present invention, the groove of the drum around which the first cable in the predetermined range is wound is more in the drum than the groove of the drum in which the portion other than the predetermined range of the first cable is wound. Since it forms so that it may be located inside radial direction, it can suppress more easily that a 1st cable loosens, and can open / close an opening / closing body more smoothly.

  (4) According to the opening / closing body opening / closing drive device of the present invention, the end portion of the first cable 7 including the end portion of the first cable is attached to the first cable attachment portion so as to be swingable with respect to the rotation direction of the drum. Because the routing route of the first cable that connects the end of the first cable attached to the moving body and the end attached to the drum can always be the shortest route, the abrupt first cable Thus, the opening / closing operation of the opening / closing body can be made smoother.

  (5) According to the opening / closing body opening / closing drive device of the present invention, since the slack of the descending cable can be prevented in a state where the moving body is located at the ascending direction moving end, the ascending direction moving end toward the descending direction moving end. When starting the movement of the moving body, the generation of backlash, judder and time lag can be suppressed, and the window glass can be moved up and down smoothly. In particular, when the descending cable is loose at the ascending movement end, the window glass is prevented from falling by its own weight before being pulled by the descending cable and moved in the descending direction. Can do.

The figure explaining the structure of the window regulator as an example of an opening-closing body opening / closing drive device. (A) is the top view which looked at the drum from the axial direction by the side where the 1st cable attachment part is formed, (B) is a partially abbreviated II sectional view of (A). The figure explaining the variation of the cable end of a 1st cable. The top view explaining the state which attaches the cable end formed in the edge part of a 1st cable to a 1st cable attachment part. FIG. 4 is a partially omitted cross-sectional view for explaining a state in which a cable end formed at the end of the first cable is attached to the first cable mounting portion. The top view which looked at the drum from the axial direction of the side by which the 2nd cable attaching part is formed. (A) The figure which shows the state which rotated the drum further in the normal | positive direction in the state which the moving body has reached the raising direction moving end, (B) rotated the drum further in the positive direction from the state of (A). The figure which shows a state.

  Hereinafter, embodiments of the opening / closing body opening / closing drive device 1 will be described with reference to the drawings. As shown in FIGS. 1 and 2, the opening / closing body opening / closing drive device 1 has a drive unit 3 that opens and closes the opening / closing body 5, and a groove 41 that continues spirally on the outer peripheral surface. The rotating drum 4 and the opening / closing body 5 are connected, the moving body 6 is moved in the moving direction of the opening / closing body 5, and the first cable 7 is connected to the moving body 6, wound around the drum 4 in the opposite directions, and sent out. And a second cable 8. The drum 4 is rotatably held in the housing 16, and the first cable 7 and the second cable 8 extending from the drum 4 are directed in different directions from cable extension portions 17 and 17 provided in the housing 16. It is growing. The cable extending portion 17 is provided with a biasing portion 18 that biases each cable in order to prevent the first cable 7 and the second cable 8 from loosening. The urging unit 18 is a spring, for example. The opening / closing body opening / closing drive device 1 opens and closes the opening / closing body 5 by moving the moving body 6 in the moving direction of the opening / closing body 5 by winding and sending out the first cable 7 and the second cable 8 by the rotation of the drum 4. To drive.

  Here, the opening / closing body opening / closing drive device 1 according to the present embodiment is used for a window regulator 2 that opens and closes a window glass as an opening / closing body 5 provided on a door of a vehicle and driven to open / close. . The opening / closing body opening / closing drive device 1 of the present invention is not limited to the one used for the window regulator 2, and may be configured to drive the opening / closing body 5 that can open and close the opening provided in the vehicle. What is necessary is just to drive the slide door as the opening-closing body 5, for example.

  The drive unit 3 is for driving the opening / closing body 5 to open and close. For example, the drive unit is configured to open and close the open / close body by a motor, and includes a drive shaft 31 and a known motor (not shown) connected to the drive shaft 31 so as to rotationally drive the drive shaft 31. And a main body 32 having a reduction gear (not shown). The drive shaft 31 is formed in a spur gear shape in which teeth on the outer peripheral surface thereof are parallel to the axis of the drive shaft 31. As shown in FIG. 2, the drum 4 has a cylindrical shape and is rotated by the driving force of the driving unit 3. A lower end surface that forms a cylinder bottom portion is provided at the lower end in the axial direction of the outer peripheral surface of the drum 4, and an upper end surface that forms an upper surface portion of the cylinder is provided at the upper end of the outer peripheral surface of the drum 4. A through hole extending in the axial direction and having openings at the upper end surface and the lower end surface is formed at the center of the drum 4, and the drive shaft 31 of the drive unit 3 is inserted into the through hole. Inner teeth that mesh with teeth provided on the outer peripheral surface of the drive shaft 31 are formed on the inner peripheral wall of the drum 4 formed by the through holes, and the rotational force of the motor is transmitted to the drive shaft via the speed reducer. The drum 4 is rotated by the rotation of the drive shaft 31. Thus, the drum 4 rotates by the driving force of the driving unit 3 because the driving force of the motor of the main body 32 is transmitted to the drive shaft. The drive unit 3 is not limited to the above-described form, and any form may be used as long as the drum 4 can be rotated.

A spiral groove 41 around which the first cable and the second cable are wound is formed on the outer peripheral surface of the drum 4. For example, as shown in FIG. 2B, the drum 4 is provided on the outer peripheral surface of the drum 4 in a spiral shape with about 5 and a half turns.
The drum 4 is provided with a first cable attachment portion 43 to which an end portion on the drum side which is an end portion of the first cable 7 attached to the drum 4 is attached. The first cable attachment portion 43 is formed from the outer peripheral surface of the drum 4 to the inside of the radius of the drum 4, and the cable end insertion hole 9 communicating with the cable end accommodating portion 10 is formed on the upper end surface. It communicates with the groove 41. In the present embodiment, a first cable communication portion 42 is provided between the end portion on the upper end surface side of the groove 41 that spirally extends toward the upper end surface of the drum 4 and the first cable attachment portion. The cable attaching portion 43 and the groove 41 on the outer periphery of the drum 4 are communicated by the first cable communicating portion 42. The first cable communication portion 42 is formed on the outer peripheral surface of the drum 4 so that a space is formed on a surface substantially parallel to the groove extending in the vicinity of the first cable attachment portion from the first cable attachment portion toward the groove 41. It is formed to expand. A drum-side end portion of the first cable 7 is attached to the first cable attachment portion 43, and a first cable extending from the end portion of the first cable 7 is provided on the outer periphery of the drum 4 through the first cable communication portion 42. Rolled up into the groove. The first cable communication portion 42 has a groove in which a predetermined range length is wound from the drum-side end portion of the first cable 7, and the drum 4 in which a portion other than the predetermined range length of the first cable 7 is wound. It is located inside the drum 4 in the radial direction from the groove 41. Here, the “predetermined range length” is a length necessary to suppress the slack of the first cable, and at least a movement different from a smooth movement such as looseness caused by the slack due to the extension of the cable. It suffices if it is appropriately set so as to suppress the above.

  Further, as shown in FIG. 6, a second cable attachment portion 45 is formed on the lower end surface in the radial direction of the drum 4, and the drum side end which is an end portion on the side attached to the drum 4 of the second cable 8. The part is attached. The drum 4 is formed with a second cable communication portion 44 that spirally extends toward the lower end surface of the drum 4 and extends from an end portion on the lower end surface side of the groove 41 toward the second cable attachment portion 45. The outer peripheral surface groove 41 and the second cable communication portion 44 communicate with each other.

  FIG. 2B is a longitudinal section in the axial direction of the drum 4. In the drum 4, the groove 41 formed on the outer peripheral surface of the drum 4 extends from a portion extending from the first cable communication portion 42. The diameter α of the drum 4 in which the groove 41 of the part that goes around the outer peripheral surface is formed is larger than the diameter β of the drum 4 in which the groove 41 of the other part of the drum 4 is formed.

  The drum side end portion of the first cable 7 is attached to the first cable attachment portion 43. When the drum 4 rotates and the first cable 7 near the end is sent out, the drum side end of the first cable 7 is coaxial with the axial direction of the drum 4. Around the central axis of the first cable mounting portion 43 in the cable end accommodating portion 10. As the drum side end of the first cable 7 rotates, the end of the first cable 7 extending from the drum side end attached to the attachment portion 43 of the first cable 7 is centered on the end. Oscillates outward in the drum radius direction. In the present embodiment, as shown in FIG. 2A, a cable end 7a is formed at the drum side end of the first cable 7, and the cable end 7a has a spherical shape with a diameter larger than the diameter of the first cable 7. Is formed. The cable end 7a rotates around the central axis of the cable end 7a in the same axial direction as the axis of the drum 4 in the first cable housing portion 10, and the end portion of the cable 7 around the cable end 7a is the drum. Swings outward in the radius direction.

The first cable attachment portion 43 has a cable end insertion hole 9 and a cable end accommodating portion 10 in the present embodiment. A through hole penetrating the upper end surface and the lower end surface of the drum 4 is formed radially inward from the outer peripheral surface of the drum 4, and the through hole is connected to the first cable communication portion 42. A cable end accommodating portion 10 that accommodates the cable end 7 a is formed in the through hole, and a cable end locking portion 11 and a top surface portion 12 are formed in the cable end accommodating portion 10. The cable end locking portion 11 is capable of locking the inner wall of the through hole on the side connected to the first cable communication portion 42 and the cable end 7a, and the first cable 7 extending from the wire end 7a is connected to the first cable communication. It is formed so as to extend along the portion 42. Further, in order to prevent the cable end 7a accommodated in the cable end accommodating portion 10 from coming out from the upper side in the axial direction of the drum 4 (the front side in FIG. 2A), the cable end insertion hole 9 described later is excluded. A top surface portion 12 that closes a part of an opening formed on the upper end surface of the drum 4 is formed. In this embodiment, the top surface portion 12 is provided at two locations so as to face the radial direction of the drum 4, and the first cable 7 can pass between the top surface portions 12 when the cable end 7 a is attached. A slit is formed. A cable end insertion hole 9 is formed in the opening formed in the upper end surface of the drum 4 in the through hole so that the cable end 7a of the first cable 7 can be inserted.

  The cable end locking portion 11 is formed so that the cable end 7a can rotate with respect to the rotation direction of the drum 4, and restricts the movement of the cable end 7a in the winding direction of the first cable 7 around the drum. The cable end 7a is locked. In the present embodiment, when viewed from above in the axial direction of the drum 4, it is formed in an arc shape having a radius that is the same as or slightly larger than the radius of the spherical cable end 7a, and the first cable 7 of the cable end 7a is Since the extended surface is locked so as to come into contact with the cable end locking portion 11, the cable end 7 a can be rotated in the cable end accommodating portion 10.

  Note that the shape of the cable end 7a of the first cable 7 is not limited to a spherical shape, but is, for example, a disk shape as shown in FIG. 3 (A), or a cylindrical shape as shown in FIG. 3 (B). Or a semi-cylindrical shape as shown in FIG. The shape of the cable end 7 a of the first cable 7 is such that at least the axial direction side of the first cable 7 can contact the cable end locking portion 11 and can rotate with respect to the rotation direction of the drum 4. Good.

  The first cable communication portion 42 is arranged with a predetermined range of the first cable 7 extending from the cable end 7a in a state where the cable end 7a of the first cable 7 is locked to the cable end locking portion 11. It is a part to be wound, and is formed so as to be located on the inner side in the radial direction of the drum 4 so that the diameter outside the predetermined range is smaller than the diameter of the drum 4 of the groove 41 on the outer peripheral surface of the drum 4. In the present embodiment, the first cable is attached by extending from a groove 41 formed on the outer peripheral surface of the drum 4 and curvedly extending toward the first cable attaching portion 43 provided on the radially inner side of the drum 4. It communicates with the portion 43. Therefore, the groove constituting the first cable communication portion 42 is located on the radially inner side of the drum 4 with respect to the groove 41 formed on the outer peripheral surface of the drum 4. The position on the radially inner side of the first cable communication portion 42 and the length thereof are appropriately set within a range where it is necessary to remove the slack of the first cable 7. That is, it is only necessary that the cable 7 be provided radially inward so that the cable feed amount of the cable 7 is reduced so that the movable body 6 can smoothly move in a state where the movable body 6 is positioned at one moving end. The moving body 6 may be provided so that the cable feed amount of the cable 7 is reduced from the state where the moving body 6 is positioned near one moving end. As shown in FIG. 2 (A), the cable feed amount of the first cable 7 is reduced by forming the first cable communication portion 42 so as to gradually approach the groove 41 on the outer peripheral surface of the drum 4. The first cable 7 can be gradually decreased, and the first cable 7 can be prevented from being damaged at the connection portion between the groove 41 and the first cable communication portion 42. The first cable communication portion 42 is opened from the first cable communication portion 42 toward the outer peripheral surface of the drum 4. By opening the outer peripheral direction side of the drum 4 in this way, a predetermined range of the first cable 7 is sent out from the first cable communication portion 42 when the drum 4 rotates in the forward direction. That is, since the amount of the first cable 7 sent out at the first cable communication portion 42 is set to be smaller than the amount of the second cable 8 taken up at the time of this sending, the cable is connected by the difference. Since it will be wound up, the whole cable sent out from the drum 4 will decrease, and slack will be suppressed.

  When attaching the cable end 7a formed at the end of the first cable 7 to the first cable attachment portion 43, first, as shown in FIG. 4 (A), FIG. 4 (B), and FIG. 5 (A). The cable end 7 a is inserted into the cable end insertion hole 9 from the upper end surface side of the drum 4, the first cable 7 is inserted into the slit formed between the top surface portions 12, 12, and the first cable 7 is wound in the winding direction. As shown in FIGS. 4C and 5B, the cable end 7 a is moved to the cable end accommodating portion 10. The cable end 7 a moved to the cable end accommodating portion 10 is restricted from moving in the winding direction of the first cable 7 by the cable end locking portion 11, and the cable end 7 a is connected to the shaft of the drum 4 by the top surface portion 12. It is locked while preventing it from slipping out from above the direction (front side in FIG. 4).

  Since the cable end (not shown) of the second cable 8 and the second cable mounting portion 45 have a conventionally known configuration, a detailed description thereof is omitted, but the cable end of the second cable 8 is a known cable. It is an end, and a disk-shaped thing like FIG. 3 (A) can be used, It is latched by the 2nd cable attachment part 45 so that it cannot rotate. A second cable attachment portion 45 is formed on the lower end surface side on the radially inner side of the drum 4. Of the grooves 41 formed on the outer peripheral surface of the drum 4, a second cable communication extending from the end on the lower end surface side of the groove 41 extending spirally toward the lower end surface of the drum 4 toward the second cable attachment portion 45. A portion 44 is formed, and the groove 41 on the outer peripheral surface of the drum 4 and the second cable attachment portion 45 communicate with each other. The second cable communication portion 44 is a portion where the second cable 8 extending from the cable end of the second cable 8 is disposed in a state where the cable end of the second cable 8 is locked to the second cable attachment portion 45. There is also a wall in the outer peripheral direction of the drum 4 to restrict the second cable 8 from swinging.

The first cable 7 is a cable that is fed out from the drum 4 when the moving body 6 is moved toward one moving end, and the second cable is the drum 4 that is moved when the moving body 6 is moved to one moving end. The cable is wound around. Therefore, in the present embodiment, when the moving body 6 is moved toward the moving end of the window glass that is one moving end, the lowering cable fed from the drum 4 becomes the first cable 7, and the drum 4 The ascending cable wound around the second cable 8 becomes the second cable 8. When one moving end is a moving end in the lowering direction of the window glass, the cable sent out from the drum 4 is a rising cable, so the rising cable becomes the first cable 7 and is wound around the drum 4. The descending cable becomes the second cable 8. The moving body 6 is connected to the opening / closing body 5 and is moved so as to move the opening / closing body 5 in the opening / closing movement direction when the first cable 7 and the second cable 8 are wound around the drum 4 and sent out. In this embodiment, it is connected to the window glass, and when it is lifted, it is pulled by the lifting cable that is the second cable 8, and when it is lowered, it is pulled by the lowering cable that is the first cable 7. The carrier plate moves the window glass in the vertical direction of the vehicle.

  The cable end 7 a of the first cable 7 is attached to the first cable attachment portion 43 of the drum 4, the cable end of the second cable 8 is attached to the second cable attachment portion 45, and the groove 41 formed on the outer peripheral surface of the drum 4. The first cable 7 and the second cable 8 are wound in opposite directions, and the first cable 7 is directed downward from the housing 16 of the drum 4 and the second cable 8 is directed upward from the housing 16 of the drum 4. Is extended.

  The opening / closing body opening / closing drive device 1 may further include a guide rail 13 that guides the moving body 6 in the opening / closing direction. In this embodiment, the guide rail 13 guides the moving body 6 in the up-down direction that is the opening / closing direction of the window glass. The moving body 6 is restricted from moving in the opening direction and the closing direction at one moving end and the other moving end. In the present embodiment, the guide rail 13 restricts the movement of the moving body 6 in the opening direction or the closing direction, respectively, so that the movement of the moving body 6 is regulated at one moving end and the other moving end (not shown). A stopper is provided, and the moving body 6 is formed to be movable from one moving end to the other moving end. Here, the one moving end and the other moving end are end portions where movement of the moving body 6 in the opening direction and the closing direction is restricted, and it is desired to suppress slack that causes backlash and time lag. When the moving body 6 is moved toward the moving end of the moving body 6, the end where the movement of the moving body 6 is restricted becomes one moving end, and when moving to one end of the moving body 6 The end serving as the base point of the other is the other end. Accordingly, when it is desired to suppress the slack of the cable at the moving end of the moving body 6 in the opening direction, the end where the movement of the moving body 6 moving in the opening direction is restricted becomes one moving end, and the movement in the closing direction is performed. When it is desired to suppress the slack of the cable at the end, the end where the movement of the moving body 6 moving in the closing direction is restricted becomes one moving end. In the present embodiment, the moving body 8 is moved in the closing direction of the opening / closing body 5, that is, the moving-up end that is restricted from moving in the rising direction that is the closing direction of the window glass is one moving end. The moving end in the descending direction as the base point is the other moving end. The first cable 7 extending downward from the housing 16 of the drum 4 is connected to the moving body 6 by changing the wiring direction by the direction changing member 14 provided at the lower end of the guide rail 13. The second cable 8 extended upward from the housing 16 of the drum 4 is connected to the moving body 6 by changing the wiring direction by the direction changing member 15 provided at the upper end of the guide rail 13. In addition, as long as the movement of the moving body 6 in the opening direction and the closing direction is restricted, the stopper may not be provided. For example, the movement of the moving body 6 may be restricted by the direction changing members 14 and 15. .

  With the above-described configuration, when the drum 4 winds up the second cable 8 and rotates in the positive direction, which is the direction in which the first cable 7 is sent out, by the drive of the drive unit 3, the second cable 8 is turned into the drum 4. The first cable 7 is sent out from the drum 4, the moving body 6 is pulled by the second cable 8, moves from the other moving end to one moving end, and the opening / closing body 5 is moved to the other end. To one end. That is, the moving body 6 moves from the lower end moving end of the guide rail 13 to the upper end moving end, and the window glass is moved from the lower end moving end to the upper end moving end. On the other hand, when the drum 4 rotates in the reverse direction, which is the direction in which the second cable 8 is sent out, the first cable 7 is wound around the drum 4, the second cable 8 is sent out from the drum 4, and the moving body 6 moves in one direction. The opening / closing body 5 is moved from one end toward the other end, and the opening / closing body 5 is moved from one end toward the other end. That is, the moving body 6 is moved from the moving direction moving end of the guide rail 13 to the moving direction in the descending direction, and the window glass is moved from the moving direction in the descending direction to the moving end in the moving direction.

  When the drum 4 is rotated in the forward direction and the moving body 6 is moved from the other moving end to one moving end, the moving body 6 is restricted from moving further at one moving end by a stopper (not shown) and moved. It will be in the state where the body 6 is located in one moving end. That is, the moving body 6 is further restricted from moving in the upward direction at the upward movement end, and the mobile body 6 is positioned at the upward movement end. At this time, even when the moving body 6 is restricted from moving at one moving end, and the moving body 6 stops moving, the drum 4 further includes the second end in order to hold the opening / closing body 5 in the closed position. The cable 8 is wound up and rotated in the forward direction in which the first cable 7 is sent out. That is, in a state where movement of the moving body 6 in the upward direction is restricted, the drum 4 is further rotated in the upward rotational direction in which the upward cable as the second cable 8 is wound and the downward cable as the first cable 7 is sent out. Let

  When the moving body 6 is located at one moving end and the drum 4 further rotates in the forward direction, the first cable 7 is sent out from the first cable connecting portion 42 as shown in FIG. Since the first cable connecting portion 42 is located radially inward of the drum 4 with respect to the groove 41 formed on the outer peripheral surface of the drum 4, the position where the first cable 7 is extended by the rotation of the drum 4 is the drum 4. From the outer peripheral position of the drum 4 to the inside in the radial direction of the drum 4. On the other hand, the second cable 8 is wound around the groove 41 formed on the outer peripheral surface of the drum 4 in the same manner as the previous part by this rotation. Therefore, the amount of winding of the second cable 8 does not change when the moving body 6 is moved toward one moving end, but the amount of feeding of the first cable 7 is reduced. The cable feed amount of the first cable 7 fed from the drum 4 is reduced with respect to the cable winding amount. That is, the cable feed amount of the descending cable, which is the first cable 7 sent out from the drum 4, is reduced with respect to the cable winding amount of the raising cable, which is the second cable 8 wound around the drum 4. Yes. Further, the cable end 7a rotates around the central axis of the cable end 7a in the same axial direction as the axis of the drum 4 in the cable end accommodating portion 10, and the end portion of the first cable 7 has a radius around the cable end 7a. Since it swings outward, the routing route of the first cable 7 connecting the end portion of the first cable attached to the moving body 6 and the end portion attached to the drum 4 is always the shortest route. Therefore, the movement of the opening / closing body 5 can be made smooth without causing a sudden change in the movement of the first cable 7. Further, as shown in FIG. 7B, the drum 4 further rotates from the state of FIG. 7A, and the first cable 7 extending from the drum 4 toward the cable extension 17 contacts the housing 16. When the drum 4 is rotated to such a position, the position where the drum 4 is advanced from the position where the first cable connecting portion 42 contacts the first cable 7 and the housing 16 (position below the paper surface in FIG. 7). However, since the end portion of the first cable 7 can swing around the cable end 7a, the cable feed amount of the first cable 7 fed from the drum 4 with respect to the cable winding amount of the second cable 8 is set. It can be reduced and slack can be suppressed.

Thus, since the first cable connecting portion 42 of the drum 4 is located on the radially inner side of the drum 4 with respect to the groove 41 formed on the outer peripheral surface of the drum 4, the movable body 6 is located at one moving end. In the state, the cable feed amount of the first cable 7 is reduced and the slack is suppressed. That is, the moving body 6 is positioned at one moving end because the diameter of the drum 4 from which the first cable 7 is fed out from the drum 4 is smaller than the diameter of the drum 4 around which the second cable 8 is wound around the drum 4. When the drum 4 is rotated in the forward direction, the cable feed amount of the first cable 7 fed from the drum 4 is reduced with respect to the cable winding amount of the second cable 8 wound around the drum 4. The slack of the first cable 7 can be suppressed. Therefore, in addition to the present embodiment, the diameter of the drum 4 to which the first cable 7 is fed is smaller than the diameter of the drum 4 around which the second cable 8 is wound, so that the moving body 6 can be smoothly moved. If it can suppress, it will not be limited to this embodiment, The diameter of the drum 4 from which the 1st cable 7 is sent out by two drums which have different diameters of the drum 4 by which the 2nd cable 8 is wound up The cable feed amount of the first cable 7 may be reduced by making it smaller than the diameter.

Further, the predetermined length of the first cable 7 sent out from the drum 4 is smaller than the diameter of the drum 4 around which the second cable 8 is wound, so that the first cable 7 is provided on the drum 4. The first cable 7 having a length within a predetermined range from the drum side end of the first cable 7 attached to the first cable attachment portion 43 is an amount by which the first cable 7 is sent out from the drum 4 by the rotation of the drum 4. A certain first cable feeding amount is set to be smaller than a second cable winding amount, which is an amount by which the second cable 8 is wound around the drum 4. Therefore, since the slack can be suppressed by a predetermined range length from the end of the first cable 7 attached to the first cable attachment portion 43 of the drum 4, the moving body 6 is positioned at one moving end. The slack can be more reliably suppressed.

  Thus, after the movable body 6 reaches the moving end in the upward direction, the drum 4 continues to rotate and the second cable 8 is wound, whereby the opening / closing body 5 can be reliably held in the closed position. By reducing the cable feed amount of the first cable 7 rather than the cable winding amount of the second cable 8, it is possible to suppress the first cable 7 from being loosened and to prevent the first cable 7 from being loosened. The biasing part 18 for doing so can be made small.

  Further, due to the initial variation and aging, the length of the second cable 8 is extended, and the position of the first cable mounting portion 43 when the drum 4 reaches the moving end in the upward direction of the moving body 6 is the rotation of the drum 4. Even when the head is advanced in the positive direction, the slack generated in the first cable 7 can be reduced thereby, so that the biasing portion 18 for preventing the slack of the first cable 7 is made small. Can do.

  Then, as shown in FIG. 7, when opening the opening / closing body 5 from the state where the opening / closing body 5 is securely closed, the drum 4 is rotated in the reverse direction to wind the first cable 7 around the drum 4. Then, the second cable 8 is sent out from the drum 4 to move the moving body 6 from one moving end to the other moving end. At this time, since the first cable 7 is held in a state with little slack, the moving body 6 can be moved smoothly in response to the rotation of the drum 4. The generation of judder and time lag can be suppressed, and the window glass can be moved up and down smoothly. In particular, in this embodiment, when the lowering cable is loose at the ascending movement end, the window glass as the opening / closing body 5 is opened and closed before being pulled by the first cable 7 and moved in the lowering direction. It can suppress that the body 5 falls with dead weight.

  Further, when opening the opening / closing body 5, the cable winding amount in a predetermined range of the first cable 7 wound around the first cable communication portion 42 is smaller than the cable feeding amount of the second cable 8, thereby Although the two cables 8 may be loosened, as described above, as shown in FIG. 2B, the groove 41 formed on the outer peripheral surface of the drum 4 extends from the portion extending from the first cable communication portion 42 of the drum 4. Since the diameter α of the drum 4 in which the groove 41 of the part that goes around the outer peripheral surface is formed is larger than the diameter β of the drum 4 in which the groove 41 of the other part of the drum 4 is formed, The cable winding amount of the first cable 7 wound around the groove 41 in the portion that goes around the outer peripheral surface of the drum 4 from the portion extending from the first cable communication portion 42 is larger than the cable feeding amount of the second cable 8. Therefore, it is possible to absorb the slack generated on the second cable 8 side.

  In addition, since the terminal part of the 1st cable including the drum side edge part of the 1st cable 7 is attached to the 1st cable attaching part 43 so that it can rock | fluctuate with respect to the rotation direction of the drum 4, it is attached to the moving body 6. Since the routing route of the first cable 7 connecting the end portion of the first cable to be attached and the end portion attached to the drum 4 can always be the shortest route, a sudden change in the movement of the first cable 7 Therefore, the opening / closing operation of the opening / closing body can be made smoother.

  The opening / closing body opening / closing drive device 1 and the window regulator 2 of the present invention are not limited to the above-described embodiments, and can be appropriately changed without departing from the gist of the present invention. For example, in the present embodiment, in the window regulator 2, the slack removal in the state where the moving body 6 is located at the moving end in the upward direction is described. The present invention can also be applied to the case where the slack at the moving end of both the ascending direction moving end and the descending direction moving end of the moving body 6 is suppressed.

  The opening / closing body opening / closing drive device 1 according to the present invention can be suitably used as, for example, a window regulator 2 for raising and lowering a window glass of a vehicle.

DESCRIPTION OF SYMBOLS 1 Opening / closing body opening / closing drive device 2 Window regulator 3 Drive part 4 Drum 5 Opening / closing body 6 Moving body 7 First cable 8 Second cable 41 Groove 43 First cable attachment part

Claims (5)

A drive unit that opens and closes the opening / closing body, a drum that has a spiral continuous groove on the outer peripheral surface, is rotated by the driving force of the drive unit, and is connected to the opening / closing body and moves in the moving direction of the opening / closing body. A movable body, and a first cable and a second cable that are connected to the movable body, wound around the drum in opposite directions, and fed out; and by rotating the drum, the first cable and the second cable are An opening / closing body opening / closing drive device for moving the moving body in the opening / closing body moving direction by winding and sending, and opening / closing the opening / closing body,
The moving body is
The movable body is movable between one moving end and the other moving end that are restricted from moving in the opening direction and the closing direction,
The drum is
The second cable is wound up, and the drum is rotated in the forward direction, which is the direction in which the first cable is sent out, so that the movable body is moved from the other moving end to the one moving end, and the first cable The moving body is moved from the one moving end to the other moving end by rotating the drum in the reverse direction, which is the direction in which the second cable is sent out, and the moving body moves to the one When the drum is rotated in the forward direction in the state positioned at the end, the cable feeding of the first cable fed from the drum is performed with respect to the cable winding amount of the second cable wound around the drum. An opening / closing body opening / closing drive device characterized in that the amount is reduced. The first cable in a predetermined range length from the drum side end of the first cable attached to the first cable attachment provided in the drum,
The first cable feed amount, which is the amount by which the first cable is fed from the drum by the rotation of the drum, is less than the second cable take-up amount, which is the amount by which the second cable is wound around the drum. The opening / closing body opening / closing drive device according to claim 1, wherein The groove of the drum around which the first cable in the predetermined range is wound is positioned on the inner side in the radial direction of the drum from the groove of the drum where the portion other than the predetermined range of the first cable is wound up. 3. The opening / closing body opening / closing drive device according to claim 2, wherein the opening / closing body opening / closing drive device is formed. The end portion of the first cable 7 including the drum-side end portion of the first cable attached to the first cable attachment portion provided on the drum is swingable with respect to the rotation direction of the drum. The opening / closing body opening / closing drive device according to claim 2, wherein the opening / closing body opening / closing drive device is attached to the portion. 5. A window regulator that uses the opening / closing body opening / closing drive device according to claim 1 to open / close a window glass of a vehicle in a vertical direction of the vehicle, wherein the drum is configured such that the movable body is the window glass. In a state where the movable body is positioned at the upward movement end that is restricted from moving in the upward direction, which is the closing direction, the ascending cable for moving the movable body in the upward direction is wound, and the movable body is lowered in the open direction. When the drum is rotated in the ascending rotation direction for sending out the descending cable that moves in the direction, the cable feeding of the descending cable that is sent out from the drum with respect to the cable winding amount of the ascending cable wound around the drum A window regulator characterized in that the amount is reduced.

Images