JP2006057450A - Cable driving device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cable driving device without separating a cover even in manual operation. <P>SOLUTION: This cable driving device A is characterized in that a U groove for storing the outer end for fixing an end part of a conduit of a housing 1, is arranged so as to communicate with the inside of a drum storage part 3, and so as to open the same side as the opening side of the drum storage part 3; the outer end 10 is movably stored in the shaft direction in its U groove; a slipping-out preventive metallic plate retainer 7 of the outer end 10 of a cross-sectional U shape, is also put on the vicinity of a going in and out part so as to cover an opening of its U groove; and its tip part is bent and calked to the reverse surface side of the going in and out part. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a cable driving device used for a window regulator of an automobile. More specifically, the present invention relates to a cable drive device for circulatingly driving a loop of a cable by winding one of a pair of cables on a drum by rotating a drive shaft and feeding the other from the drum.

  A conventional drive device for a cable type window regulator includes a housing 101 made of a synthetic resin and a cover 102 made of a metal plate that covers the upper surface of the housing 101 like a drive device 100 shown in FIG. The housing 101 includes a bottomed cylindrical drum accommodating portion 104 that accommodates the drum 103 and a plate-like base portion 105 that extends outward from the opening side. The base portion 105 surrounds the drum accommodating portion 104. As described above, a plurality of bolt holes 106 are provided. The cover 102 has a claw hole 107 corresponding to the bolt hole 106. The housing 101 and the cover 102 are formed by inserting a stepped bolt 108 from the back side into the bolt hole 106 of the housing, passing the claw hole 107 of the cover 102 through the front end portion protruding to the front side, and further crimping the claw portion 109. Are combined.

  Since the conventional drive device 100 inserts the stepped bolt 108 from the back surface of the housing 101 to perform the caulking process of the claw portion 109, it is difficult to automate the assembly work. Also, manual assembly is extremely time-consuming.

  On the other hand, in the housing 101 of the driving device shown in FIG. 15, cylindrical conduit holding portions 112 and 113 for attaching ends of a pair of conduits (outer casings) 111 that guide the inner cable 110 locked to the drum 103. Is provided. The outer ends 114 fixed to the end portions of the conduits 111 are accommodated in the conduit holding portions so as to be movable in the axial direction, and the outer ends 114 are urged outward by the springs 115 so that the outer ends 114 are moved to the inner cords 110 during use. The resulting elongation is absorbed. Furthermore, one of the conduit holding portions 112 is configured to have a U-shaped cross section, so that the conduit 111, the inner cable 110, the outer end 114, and the spring 115 are assembled, and the tension is applied to the inner cable 110, or It can be assembled to the housing 101 with the slack removed. The cover 102 is provided with a pressing portion 117 for closing the upper opening of the U groove 116 of the conduit holding portion 112, and the outer end 114 is prevented from coming off by the pressing portion 117. The cover 102 is provided with an engaging tongue piece 118 that engages with a protrusion formed on the housing 101 and an attachment piece 119 that is caulked to the housing 101.

  The pressing portion 117 of the cover 102 is reinforced by the edge bending portion 120 or the like, but the strength is not sufficient. In particular, in the case of a manual cable drive device that manually rotates the handle lever to rotate the drum, an excessive force is applied to the inner cable 110 when the handle is accidentally rotated beyond the rising end of the window glass. The reaction force causes a force that the outer end 114 tries to open the cover 102 and the cover 102 is detached from the housing 101.

  Further, as shown in FIG. 16, some conventional cable driving devices are provided with an annular protrusion 121 that holds the end of a cable extension spring 115 on the end face of the conduit holding portion 112 of the housing 101. In this case, although the upper part of the U-groove 116 for assembling the outer end is open, the mold is pulled out in three directions. Therefore, the structure of the mold is complicated. Further, in the conventional cable drive device, the drum and the housing are in sliding contact with each other on a plane. Therefore, there is a problem that the resistance during rotation of the drum is large.

  An object of the present invention is to provide a cable drive device such as a window regulator suitable for automation of assembly work. Furthermore, a second object of the present invention is to provide a cable driving device in which the cover does not come off even when operated manually. Furthermore, this invention makes it the 3rd subject to provide the cable drive device which can be manufactured with a simple metal mold | die. Furthermore, the problem is to reduce the resistance of drum rotation.

  A cable drive device such as a window regulator according to the present invention has a bottomed cylindrical drum housing portion, a base portion extending outward from the peripheral edge of the opening of the drum housing portion, and a pair of cables extending in and out of the drum housing portion. A housing provided with a portion, a metal plate cover fixed to the base so as to cover the opening of the drum housing portion, a drive shaft rotatably supported by the housing and the cover, and rotation by the drive shaft A pair of cables that are driven and housed in the drum housing part, and that are respectively wound on the drum so that the ends of the drums are alternately wound and wound around the drum, and are led to the outside from the cable entry / exit part And locking pieces formed at a plurality of locations around the periphery of the cover in a caulking receiving portion provided near the periphery of the base portion. By attaching, it is characterized by securing the cover to the housing.

  In such a drive device, it is preferable that the caulking receiving portion is a concave groove formed on each of two sides of the base portion facing each other with the drum housing portion interposed therebetween. Further, the caulking receiving portion can be constituted by a slit formed in the vicinity of the periphery of the base portion. Further, the caulking receiving portion may be a peripheral portion having a predetermined thickness of the base portion, and a plurality of positioning protrusions provided on the base portion may be fitted with holes or notches formed in the cover. In these drive devices, it is preferable to increase the thickness of the base portion and form a thinned portion on the back side of the base portion.

  According to a second aspect of the cable drive device of the present invention, there is provided a bottomed cylindrical drum housing portion, a base portion extending outward from the periphery of the opening of the drum housing portion, and a pair of cables extending in a tangential direction of the drum housing portion. A housing provided with an access portion, a cover fixed to the base so as to cover the opening of the drum housing portion, a drive shaft rotatably held by the housing and the cover, and rotationally driven by the drive shaft; A drum housed in the drum housing section, and a pair of cables that are wound on the drum so that the ends of the drum are alternately wound and alternately wound, and are led to the outside from the cable entrance / exit section. A U-groove for accommodating an outer end with an end of the conduit fixed to at least one of the pair of cable entry / exit portions; The outer end is accommodated in the U groove so as to be movable in the axial direction, and further in the vicinity of the access portion. A retainer made of a metal plate for retaining the outer end with a U-shaped cross section is placed so as to cover the opening of the U groove, and its tip is bent and crimped to the back side of the entrance / exit It is characterized by.

  In the cable driving device, at least one of the pair of cable entrance / exit portions is provided with a U-groove so as to communicate with the inside of the drum housing portion and to open on the same side as the opening side of the drum housing portion. In the drive device in which the outer end fixed to the end portion of the conduit guiding the cable in the U groove is accommodated so as to be movable in the axial direction, and the outer end is always urged outward by a spring, Furthermore, it is preferable to form protrusions for holding the outer periphery of the spring on the left and right upper and lower ends of the U-shaped tip surface of the cable entry / exit portion having the U groove.

  According to a third aspect of the cable driving device of the present invention, a drum housing portion having a bottomed cylindrical shape, a base portion extending outward from a peripheral edge of an opening portion of the drum housing portion, and an end portion of the base portion are provided. A synthetic resin housing having a pair of cable access portions extending in the tangential direction, a cover fixed to the base portion so as to cover the opening of the drum housing portion, and the housing and the cover are rotatably held. A drive shaft, a drum that is rotationally driven by the drive shaft, and a drum that is housed in the drum housing portion, and an end portion of the drum is locked and wound on the drum so as to be alternately wound, and the cable enters and exits A pair of cables led to the outside from the section, and is in sliding contact with the other party on either the inner bottom surface of the drum housing section or the bottom surface of the drum Annular projection is provided on the drum housing portion coaxially, and the other is characterized by being flat. More preferably, the annular protrusion is provided on the inner bottom surface of the drum accommodating portion.

  In the first aspect of the cable drive device of the present invention, the locking piece is provided around the cover that covers the housing, and the crimping receiving portion provided in the vicinity of the periphery of the housing is crimped, so that the assembly work can be automated. In the drive device in which the caulking receiving portion is the engaging groove, the locking piece that is caulked fits into the engaging groove, and lateral displacement is prevented. Therefore, the mounting strength of the cover is improved without impairing the advantage of easy assembly. In a drive device with a caulking receiving portion as a slit or a drive device with a positioning projection on the housing and a fitting hole in the cover, the assembly work is somewhat impaired, but the engagement of the locking piece and the slit or the positioning projection The fitting between the hole and the hole can prevent the lateral displacement, and the assembly strength is further improved.

  In the case where the thickness of the base portion is increased and the thinned portion is formed on the back side of the base portion, the caulking strength is further improved, the assembling work is facilitated, and the material and weight of the housing are reduced. Moreover, since the back side does not come into contact with the cover, there is little risk of rusting the cover even if water accumulates.

  In the second aspect of the drive device of the present invention, the retainer made of a metal plate is caulked near the cable entry / exit portion, so that the force applied to the outer end is directly pressed by the retainer. For this reason, the cover is not subjected to a force to pry open, and the cover is less likely to come off. In addition, since the retainer is covered and caulked from the upper part of the U-groove, it can be performed simultaneously or continuously with the caulking operation of the cover, and the workability is good.

  When providing projections for holding the outer periphery of the end of the spring on the tip surface of the cable entry / exit portion having the U-groove, if the projections are provided only on the left and right tops and bottom of the U-shaped tip, Is only required in the vertical direction. This simplifies the mold structure.

  In the 3rd aspect of the cable drive part apparatus of this invention, a drum accommodating part and a drum are slidably contacted via an annular protrusion. Therefore, there are few sliding surfaces and there is little sliding resistance. In the case where the annular protrusion is provided on the inner bottom surface of the drum housing portion, molding is easy and the flatness accuracy of the inner bottom surface may be low.

  Next, a preferred embodiment of the cable driving device of the present invention will be described with reference to the drawings. In the following embodiments, the case where the present invention is applied to a cable drive device for an automobile window regulator is shown. However, the present invention is not limited to this and is also applied to a cable drive device for other applications. can do.

  FIG. 1 is a partially assembled perspective view showing an embodiment of the drive device of the present invention, FIG. 2 is a front view of the drive device before assembly, and FIGS. 3 and 4 are a plan view and a bottom view of the housing of the drive device, respectively. 5 and 6 are a plan view and a rear view of the drive device after assembly, FIG. 7 is a sectional view taken along line VII-VII in FIG. 5, and FIG. 8 is an embodiment of the cable entry / exit portion and outer end according to the present invention. 9 is a schematic perspective view of the assembling apparatus according to the present invention, FIGS. 10a and 10b are process diagrams showing the operating state of the assembling apparatus of FIG. 9, and FIG. 11 is a diagram of other parts of the assembling apparatus. FIG. 12 is a perspective view showing another embodiment of the drive device of the present invention, and FIG. 13 is a perspective view showing still another embodiment of the drive device of the present invention.

  A cable driving device A in FIG. 1 includes a housing 1 and a cover 2 that covers the housing 1. The housing 1 is provided with a drum accommodating portion 3 which is a cylindrical recess, and a drum 4 for winding a cable is accommodated in the drum accommodating portion 3. In FIG. 1, the drive shaft 5 is inserted into the cover 2 from below. The drive shaft 5 is shown in its entirety in FIG.

  A known brake spring 6 shown in FIG. 2 is interposed between the drive shaft 5 and the cover 2 (see FIG. 7). Reference numeral 7 in FIG. 1 denotes a retainer that caulks to one of the cable entry / exit portions 13 of the housing 1. Reference numeral 8 denotes a pair of cables wound around the drum 4, and these cables 8 are slidably guided to the driven part side by a conduit (outer casing) 9. That is, the cable (inner / inner cable) 8 and the conduit 9 constitute a so-called pull control cable. An outer end 10 for connecting the conduit 9 to the housing 1 is fixed to the end of the conduit 9, and a compression coil spring (hereinafter referred to as a compression spring) for compensating or absorbing the extension of the cable 8 around the outer end. 11) is provided.

  As shown in FIGS. 3 and 4, the housing 1 includes a bottomed cylindrical drum housing portion 3, a base portion 12 that is rectangular in plan view and extends outward from the periphery of the upper opening thereof, and a drum housing. It has a pair of cable entry / exit parts 13 and 14 which exhibit a substantially cylindrical shape extending in the tangential direction of the part 3. In this embodiment, the housing 1 is integrally formed of synthetic resin.

  As shown in FIGS. 3 and 7, a boss 16 that rotatably supports the end of the drive shaft 5 is provided at the center of the bottom 15 of the drum housing 3. Further, an annular protrusion 17 is formed on the inner bottom surface of the bottom portion 15 concentrically with the boss 16. The annular protrusion 17 improves the slipperiness between the drum 4 and the bottom portion 15. The annular protrusion 17 may be provided on the drum 4 side.

  As is apparent from FIG. 1, the base portion 12 is thick. Further, as shown by hatching in FIG. 4, a large number of lightening portions 18 are provided on the back side of the base portion 12. The reason why the base portion 12 is made thick and a large number of the thinned portions 18 is provided is to satisfy both weight reduction and material saving of the housing 1 and rigidity maintenance for crimping the cover 2. Note that these thinned portions 18 can be considered as remaining portions provided with a large number of reinforcing ribs 19.

  Four concave grooves 20 are formed as caulking receiving portions on the front and rear peripheral portions of the base portion 12 at positions that are symmetrical with respect to the front and rear left and right with respect to the drum housing portion 3. The concave groove 20 is formed not only on the side surface of the base portion 12 but also on the bottom surface (see FIG. 4). Further, the two concave grooves 20 on the rear side are also shallowly and continuously formed on the upper surface of the base portion 12.

  As shown in FIG. 4, the cable entry / exit portions 13, 14 are provided with thin cylindrical portions 13 a, 14 a provided integrally with the drum accommodating portion 3 on the back surface side of the base portion 12, and those thin cylindrical portions. And thick cylindrical portions 13b and 14b protruding from the side edges of the base portion 12. The thick cylindrical portion is a portion that accommodates the outer end 10. The upper surfaces of the cable entry / exit portions 13 and 14 are opened with a width larger than the diameter of the cable 8 so as to communicate with the internal cavity of the drum accommodating portion 3 so that the cable 4 can be assembled with the cable 8 wound around the drum 4. And the edge part of the upper part of the groove part formed by it is made into the taper surface so that the cable 8 may be inserted easily. Further, the cable entry / exit portion 13 on the left side in FIG. 1 is formed as a U groove having a U-shaped cross-sectional shape that opens upward in the width of the outer end 10 so that the outer end 10 can be inserted from above.

  In FIG. 1, a cover 2 is a three-dimensional press-molding of a metal plate, and includes a plate-like base plate 22, a bottomed cylindrical tubular portion 23 that rises from the center thereof, and front and rear edges of the base plate 22. The locking piece 24 extends forward and backward from the four locations and is bent downward. The position of the locking piece 24 corresponds to the position of the concave groove 20 of the housing 1, and the width thereof corresponds to the inner width of the concave groove 20. As a result, the locking piece 24 and the recessed groove 20 serve as positioning means for fitting the cover 2 to the housing 1. The lower end of the locking piece 24 is inclined somewhat outward so as to be easily covered with the housing 1. Attachment pieces 25 for attaching the driving device A to a mating member such as a door panel of an automobile extend from the center part of the front edge of the base plate 22 and the left and right parts of the rear edge.

  In FIG. 2, the drive shaft 5 has a head portion 26 formed with serrations for fixing the handle lever at the upper end, and a fan-like engagement in plan view that engages with the brake spring 6 and the drum 4 at the intermediate portion. Part 27. A shaft portion 28 is inserted below the center hole of the drum 4. As described above, the tip of the shaft portion 28 is rotatably supported by the boss 16 at the bottom of the housing 1 (see FIG. 7). The drive shaft 5 is usually manufactured by zinc die casting or the like.

  The brake spring 6 of FIG. 2 is formed by closely winding a spring steel wire in a spiral manner, and the upper and lower ends thereof are radially inward so as to engage with the engaging portion 27 of the drive shaft 5. The folded portion is a folded portion. As shown in FIG. 7, the brake spring 6 is interposed between the engaging portion 27 of the drive shaft 5 and the inner surface of the cylindrical portion 23 of the cover 2. Then, when the drive shaft 5 is rotated, the bent portion is pulled in to reduce the diameter of the coil portion, and the rotation is allowed, and the force of rotating the drum 4 from the outside via the cable 8 is reduced. In order to prevent the rotation by strongly contacting the inner surface of the cylindrical portion 23 of the cover 2.

  The drum 4 in FIG. 2 includes a spiral guide groove 29 for winding the cables in an aligned state on the outer peripheral surface, and a fan-shaped engagement protrusion in a plan view that engages with the engagement portion 27 of the drive shaft 5 on the upper end surface. This is a cylindrical synthetic resin part 30 integrally provided. As shown in FIG. 7, a central hole 31 through which the shaft portion of the drive shaft 5 passes is formed in the center portion of the drum 4, and a cable end (see FIG. 7) fixed to the end portion of the cable 8 in parallel to the center hole 31. 1 is formed with a locking hole 33 for locking. The locking hole 33 communicates with the guide groove 29 on the surface through guide slits 34 formed on the upper end surface and the lower end surface of the drum 4. The drum 4 is usually made of synthetic resin.

  The cable 8 is a flexible wire made of a single metal wire or a twisted metal wire, and transmits a force in the pulling direction. The conduit 9 is formed by spirally winding a metal wire into a tubular shape and providing a synthetic resin coating. This conduit 9 is a well-known one that supports a force in the compression direction, which is a reaction force of the pulling force of the cable 8, has flexibility, and guides the cable slidably along a curved path. The conduit 9 and the cable 8 constitute a so-called pull control cable, and therefore the cable 8 is an inner cable (inner cable) here. However, instead of the conduit 9, a rigid metal tube or synthetic resin tube may be employed, and the cable 8 may be guided by a plurality of pulleys. In this embodiment, the cable entry / exit portions 13 and 14 are also conduit attachment portions.

  In FIG. 1, an outer end 10 is a cylindrical body made of synthetic resin, and is a cylindrical small-diameter portion 10a that is slidably and rotatably accommodated in cable entry / exit portions 13 and 14 of the housing 1. And a large-diameter portion 10 b that holds the compression spring 11. A flange portion 10c that engages with the end portion of the compression spring 11 is provided at the end portion of the large diameter portion 10b. A hole 35 for inserting and fixing the conduit 9 is formed on the rear end side of the large diameter portion 10b. Further, a center hole through which the cable 8 is inserted is formed from the center of the bottom of the hole 35 to the opposite side. One end of the compression spring 11 is engaged with the flange portion 10 c of the outer end 10, and the other end is engaged with the end surfaces 13 d and 14 d of the cable entry / exit portions 13 and 14 of the housing 1.

  In this embodiment, as shown in detail in FIG. 8, the end face 13d of one cable entry / exit part 13 is formed in a U-shape, and the compression springs 11 are held at three places on both the upper and lower ends of the end face. The protrusions 36 and 37 are integrally formed. The protrusions 36 on both sides of the upper end and the protrusions 37 on the lower end are arranged so as not to overlap each other in a plan view, so that the mold that contacts the end surface 13d is formed in the vertical direction, that is, a mold that forms the drum housing 3 and the like. Can be pulled out in the same direction as the mold. This simplifies the mold configuration. Also, when the outer end 10 is covered with the compression spring 11 and incorporated in the housing 1, the small diameter portion 10a can be straightly inserted from the upper side, so that the assembling work is simple, and particularly, the cable 8 is easily tensioned. It can be assembled in the housing 1.

  The cable entry / exit portion 14 on the right side of FIG. 3 has an almost circular shape with the end surface 14d having a thin notch at the upper end portion, and therefore, the small diameter portion 10a of the outer end 10 may be inserted through the hole on the end surface 14d side. . That is, if one of the outer ends 10 on both the left and right sides is inserted from the end surface 14d side of the cable entry / exit portion 14, and then the other outer end 10 is inserted from the opening on the upper surface of the cable entry / exit portion 13, it is suitable for the cable 8. Can be assembled with tension applied.

  As shown in FIG. 8, the retainer 7 is formed by bending an elongated rectangular metal plate into a U shape, and a protrusion 7 a that holds the small diameter portion 10 a of the outer end 10 is formed at the upper end.

  When assembling the components configured as described above, for example, the outer end 10 is first fixed to the tips of the conduits 9 of the two control cables. Next, the cable 8 which is the inner cable of the control cable is inserted into the outer end 10, and the cable end 32 is cast and fixed to the tip of the cable 8. Further, after the compression spring 11 is mounted around the outer end 10, the cable end 32 is inserted into the locking hole 33 of the drum 4 and the cable 8 is wound around the drum 4. In this state, the drum 4, the cable 8, the outer end 10, and the compression spring 11 are assembled to the housing 1 as shown in FIG. At this time, as described above, first, the outer end 10 is inserted into the right cable entry / exit part 14 from the end face 14d side, and the other outer end 10 is inserted into the U groove of the left cable entry / exit part 13 from above. Grease is applied in advance to the inner surface of the drum housing 3.

  Next, the drive shaft 5 is inserted into the center hole 31 of the drum 4 and the boss 16 of the housing 1, and the cover 2 in which the brake spring 6 is fitted to the inner surface of the cylindrical portion 23 is put on the housing 1. At that time, the locking pieces 24 of the cover 2 are fitted into the four concave grooves 20 of the base portion 12 of the housing 1. Then, the lower end portion of the locking piece 24 is bent to the back side of the housing 1 and crimped, and the cover 2 and the housing 1 are integrated. Further, the retainer 7 is put on the cable entry / exit portion 13 on the left side, and the lower end portion thereof is bent to the lower surface side of the cable entry / exit portion 13 and crimped.

  Thereby, as shown in FIG. 5 and FIG. 6 or FIG. 7, the housing 1 and the cover 2 are integrated, and the assembly work is completed. As described above, the assembly operation of the cable drive unit A does not require operations such as screwing and nut tightening as in the conventional drive unit, and the assembly is performed simply by caulking the locking piece 24 and the lower end of the retainer 7. Is completed. Therefore, automation of assembly work can be facilitated.

  In the assembled drive device A, the retainer 7 separated from the cover 2 directly presses the outer end 10. For this reason, even when the driving shaft 5 is rotated manually, the retainer 7 sufficiently opposes the force even if the outer end 10 is pulled out of the U-groove by the compressive force applied to the conduit 9. There is no possibility that the cover 2 will be detached from the housing 1. In addition, the engagement between the locking piece 24 of the cover 2 and the concave groove 20 of the housing 1 allows the positioning of the cover 2 and the housing 1 to be accurate and never deviates, so that the drive shaft 5 supported by both is smoothly rotated. It is.

  Next, a method for automatically or semi-automatically assembling the cable drive device A will be described with reference to FIGS. FIG. 9 shows an assembling apparatus K for automatically caulking and assembling the above-mentioned cover locking pieces and retainers. The assembling apparatus K includes a positioning plate 41 for positioning and holding the housing, and a cover pressing jig 42 that moves up and down with respect to the positioning plate 41. The cover holding jig 42 is provided with a caulking machine 45 including four caulking levers 43 for caulking the locking pieces of the cover and an air cylinder 44 for driving so as to move up and down. Furthermore, a retainer pressing jig 46 that presses the retainer from above is provided at the left and right ends of the cover pressing jig 42.

  On the positioning plate 41, a housing positioning pin 47 protrudes, and a retainer caulking jig 48 is further provided. A sensor 49 for preventing the drive shaft from being forgotten is provided at the center.

  When assembling the above-described drive device A using such an assembly device K, first, a housing incorporating a drum, a cover incorporating a shaft and a brake spring, and a retainer are placed on the positioning plate 41, and a cover holding jig is placed. 42 is lowered to press the cover and retainer against the housing. Next, as shown in FIG. 10a, the rod 50 of the air cylinder 44 of the caulking machine 45 is extended to drive the caulking lever 43 toward the inside. The tip of the caulking lever 43 has a claw 51 bent inward, and the tip of the locking piece of the cover is pushed and bent inward as shown in FIG. 10b. At the same time, the caulking machine 45 rises somewhat and performs caulking processing.

When the cover pressing jig 42 is lowered, the retainer pressing jig 46 presses the retainer 7 against the housing 1 as shown in FIG. Next, the pressing lever 52 extends from the side of the upper surface side of the retainer pressing jig 46 to press the upper surface of the retainer pressing jig 46 (see FIG. 11b). Further, a pair of caulking claws 53 extend from the left and right inside the retainer caulking jig 48 (see FIG. 11c), and the lower end of the retainer 7 is pushed and bent toward the lower surface side of the housing 1 to complete the caulking process.

  When the above-described series of processing is completed, the claw 51 and the caulking claw 53 are returned to their original positions, and the drive device A in which the housing 1, the cover 2, and the retainer 7 are assembled together is taken out. As described above, the cable drive device A can be easily assembled by an automatic machine, and the work can be automated.

  In the above-described embodiment, the locking piece is caulked in the concave groove formed on the peripheral edge of the housing, but slits 61 are formed at three locations near the peripheral edge of the housing 1 as in the driving device B shown in FIG. As shown in FIG. 12b, the engaging piece 24 may be passed through the slit 61 and then crimped. In this case, the assembly work is somewhat complicated, but the locking piece 24 is prevented from bending outward, so that the cover 2 and the housing 1 can be more reliably integrated. Further, since the cover 2 can be positioned with respect to the housing 1 when the locking piece 24 and the slit 61 are fitted, there is no problem in holding the drive shaft 5.

  Further, in the driving device C shown in FIG. 13a, a plurality of, for example, three cylindrical positioning pins 63 project from the upper surface of the housing 1 and are engaged with the positioning pins 63 at corresponding positions of the cover 2. Is forming. Then, as shown in FIG. 13b, after the positioning pin 63 and the engagement hole 64 are fitted, the back surface side of the base portion 12 having a predetermined thickness in which the tip of the locking piece 24 protrudes to the periphery of the housing 1 It is caulking. Since this requires the positioning pin 63 to be fitted to a certain depth, the tip of the positioning pin 63 protrudes from the surface of the cover 2. Therefore, it is preferable that the attachment piece 25 of the cover 2 is a stepped state that is lifted somewhat upward from the other parts of the cover 2 so that the positioning pin 63 does not interfere with the attachment to the counterpart member. In this case, the cover 2 and the housing 1 can be positioned by fitting the positioning pin 63 and the engaging hole 64.

  In the first aspect of the cable drive device of the present invention, the housing can be easily assembled by simply covering the housing and caulking the locking piece to the caulking receiving portion of the housing. When the caulking receiving portion is an engaging groove, positioning is accurate because the locking piece fits into the engaging groove. In the driving device in which the caulking receiving portion is a slit, the assembly strength is further improved. A thickened base portion and a thinned portion formed on the back side of the base portion have high caulking strength, reduced housing material and weight, and the cover is less likely to rust.

  In the 2nd aspect of the drive device of this invention, the attachment intensity | strength of a cover is high. In an apparatus in which a protrusion for holding the outer periphery of the end of the spring is provided on the front end surface of the cable entry / exit portion having the U groove, the mold structure can be simplified because the mold can be pulled out only in the vertical direction.

  In the third aspect of the cable drive unit device of the present invention, there is little sliding resistance between the drum housing part and the drum.

It is a partial assembly perspective view which shows one Embodiment of the drive device of this invention. It is a front view before the assembly of the drive device. It is a top view of the housing of the drive device. It is a bottom view of the housing of the drive device. It is a top view after the assembly of the drive device. It is a rear view after the assembly of the drive device. It is the VII-VII sectional view taken on the line of FIG. It is a perspective view which shows one Embodiment of the cable exit / entrance part and outer end concerning this invention. It is a schematic perspective view of the assembly apparatus concerning this invention. 10a and 10b are process diagrams showing the operating state of the assembling apparatus of FIG. FIG. 11a, FIG. 11b and FIG. 11c are process diagrams showing the operating state of the other parts of the assembling apparatus. FIG. 12a is a perspective view showing another embodiment of the cable driving device of the present invention, and FIG. FIG. 13a is a perspective view showing still another embodiment of the cable driving device of the present invention, and FIG. It is a perspective view which shows an example of the conventional cable drive device. It is a perspective view which shows the other example of the conventional cable drive device. It is a principal part perspective view which shows the other example of the conventional cable drive device.

Explanation of symbols

A Cable drive device 1 Housing 2 Cover 3 Drum housing part 4 Drum 5 Drive shaft 6 Brake spring 7 Retainer 8 Cable 9 Conduit 10 Outer end 11 Compression spring 12 Base part 13 Cable entry / exit part 14 Cable entry / exit part 17 Annular protrusion 18 Thickening part 20 Concave groove 24 Locking piece 36 Protrusion 37 Protrusion B Cable drive device 61 Slit C Cable drive device 63 Positioning pin 64 Engagement hole

Claims (4)

A housing having a bottomed cylindrical drum accommodating portion and a pair of cylindrical cable outlets extending in a tangential direction of the drum accommodating portion;
A cover fixed to the base portion so as to cover the opening of the drum housing portion;
A drive shaft rotatably held by a housing and a cover;
A drum fixed to the drive shaft and housed in the drum housing portion;
Each end is locked to the drum, wound on the drum so as to be alternately wound, and provided with a pair of pull cables led to the outside from the cable entrance and exit and their conduits,
At least one of the pair of cable entry / exit portions is provided with a U-groove so as to communicate with the inside of the drum housing portion and open on the same side as the opening side of the drum housing portion. In addition, an outer end fixed to the end of the conduit is accommodated so as to be axially movable, and a retainer made of a metal plate for preventing the outer end having a U-shaped cross section is provided in the vicinity of the entrance / exit. A cable drive device such as a window regulator, which is covered so as to cover the opening of the U-groove, and whose tip is bent and crimped to the back side of the entrance / exit.   The outer end is always urged outward by a spring, and protrusions that hold the outer periphery of the spring are formed on the left and right upper and lower ends of the U-shaped tip surface of the cable entry / exit portion having the U groove. The cable drive device according to claim 1, wherein   2. The annular projection that is in sliding contact with the other party is provided on either the inner bottom surface of the drum housing portion or the bottom surface of the drum so as to be concentric with the drum housing portion, and the other is flattened. Cable drive devices such as window regulators.   The cable driving device according to claim 3, wherein the annular protrusion is provided on an inner bottom surface of the drum housing portion.

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