JP2012076704A - Webbing winding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To widen a rotatable range of a passing-through part in a webbing winding device which winds up webbing fitted to an occupant of a vehicle.SOLUTION: In this webbing winding device 10, a base 76 is integrally provided with a ring 72 and a ring 74 in a protector 70. A webbing 30 extended from a spool 20 is made to pass through the base 76, and the protector 70 is rotated in response to the fluctuation of the wound-up amount of the webbing 30 around the spool 20. Further, the protector 70 protects the webbing 30 by separating it from a frame 12. The ring 72 and the ring 74 are provided over the whole circumference of the spool 20 freely to rotate in the circumferential direction of the spool 20. With this structure, even if the webbing 30 is wound up around the spool 20, since the rotation of the ring 72 and the ring 74 is not limited, a rotatable range of the ring 72 and the ring 74 and, in turn, the base 76 can be widened, and a range of choice of the extension angle of the webbing 30 from the spool 20 can be widened.

Description

  The present invention relates to a webbing take-up device that takes up a webbing to be mounted on a vehicle occupant.

  In the safety belt hoist described in Patent Document 1 below, an arm is tiltably supported on a U-shaped leg of a housing attached to a vehicle, and a belt guide is supported on the arm. The belt guide is provided with a guide slit, and a belt extending from the shaft member is inserted through the guide slit and extended from the housing. For this reason, if the belt is moved in the axial direction of the shaft member, the movement of the belt is restricted by the belt guide and is protected from the housing.

  In addition, the belt guide is brought into contact with and separated from the shaft member by tilting the arm in accordance with a change in the winding amount of the belt around the shaft member. For this reason, the friction between the belt inserted through the guide slit and the belt guide is reduced.

  Here, in this safety belt winder, as described above, the arm is tiltably supported by the U-shaped leg of the housing.

  Thereby, when the belt is wound around the shaft member, a space in which the arm can tilt is limited in the housing. For this reason, the range in which the arm can be tilted and therefore the range in which the belt guide can be rotated is narrow, and the extension angle of the belt from the housing must correspond to the narrow range in which the belt guide can be rotated. Thereby, the selection range of the attachment angle to the vehicle of a housing becomes narrow.

JP-A-8-253101

  In view of the above fact, an object of the present invention is to provide a webbing take-up device capable of widening the rotatable range of the passage portion.

  The webbing take-up device according to claim 1 is wound by rotating a webbing attached to a vehicle occupant in the take-up direction and rotating in the take-out direction by pulling out the webbing. A take-up shaft, a frame that supports both ends of the take-up shaft, and an entire circumference of the take-up shaft that are rotatable in the circumferential direction of the take-up shaft with respect to the take-up shaft and the frame. A rotating portion and a passage portion that is provided integrally with the rotating portion and through which the webbing extends from the winding shaft pass, and is rotated according to a variation in the winding amount of the webbing to the winding shaft. And a protective member for protecting the webbing away from the frame.

  The webbing take-up device according to a second aspect is the webbing device according to the first aspect, wherein the protection member has a support portion that is slidably supported on an outer peripheral portion of the frame.

  In the webbing take-up device according to claim 1, both ends of the take-up shaft are supported by the frame, and the webbing is taken up by the take-up shaft by rotating the webbing in the take-up direction. By being pulled out from the winding shaft, the winding shaft is rotated in the pulling-out direction.

  The protective member has a rotating part and a passing part. The rotating part is provided so as to be rotatable with respect to the winding shaft and the frame, and the passing part is provided integrally with the rotating part. The webbing extending from the take-up shaft is passed through the passage portion, and the protection member is rotated in accordance with the variation in the amount of winding of the webbing to the take-up shaft. Further, the protection member protects the webbing by separating the webbing from the frame.

  Here, the rotating part of the protection member is provided on the entire circumference of the winding shaft and is rotatable in the circumferential direction of the winding shaft. For this reason, even if the webbing is wound around the winding shaft, the rotation of the rotating portion is not limited. Therefore, the rotation range of the rotating portion and thus the passing portion can be expanded, and the webbing extension angle from the winding shaft can be increased. The selection range can be expanded.

  In the webbing take-up device according to the second aspect, the support portion of the protection member is slidably supported on the outer peripheral portion of the frame.

  For this reason, a support part can be enlarged. Thereby, even if a load is applied to the protection member from the webbing, the deformation of the support portion can be suppressed, and the protection member can be prevented from coming off the frame.

1 is an exploded perspective view showing a webbing take-up device according to a first embodiment of the present invention. (A) And (B) shows the structure of the locking mechanism of the webbing take-up device according to the first embodiment of the present invention, and (A) is a plane showing the state where the lock plate is separated from the ratchet teeth. It is a figure and (B) is a top view which shows the state in which the lock plate was meshed | engaged with the ratchet tooth. 1 is a side view showing a webbing take-up device according to a first embodiment of the present invention. It is a disassembled perspective view which shows the flame | frame and protector of the webbing winding apparatus which concerns on the 2nd Embodiment of this invention. (A) And (B) is a figure which shows the flame | frame and protector of the webbing winding device which concerns on the 2nd Embodiment of this invention, (A) is a side view, (B) is sectional drawing ( It is a BB line sectional view of (A).

  [First Embodiment]

  FIG. 1 is an exploded perspective view showing the overall configuration of a webbing take-up device 10 according to a first embodiment of the present invention. In the drawings, one side in the vehicle front-rear direction is indicated by an arrow LO, one side in the vehicle width direction is indicated by an arrow WO, and the upper side of the vehicle is indicated by an arrow UP.

  As shown in FIG. 1, the webbing take-up device 10 includes a frame 12 made of iron. The frame 12 includes a substantially plate-like back plate 14 and plate-like leg plates 16 and leg plates 18 that integrally extend from both ends of the back plate 14 in the width direction. The back plate 14 is a bolt or the like. The webbing retractor 10 is attached to the vehicle body by being fixed to the vehicle body by a fastening means (not shown). A circular arrangement hole 16A and an arrangement hole 18A are formed through the leg plate 16 and the leg plate 18, respectively, and ratchet teeth 16B (inner teeth) are formed on the entire outer periphery of the arrangement hole 16A. Further, ratchet teeth 18B (inner teeth) are formed on the leg plate 18 at the vehicle upper side portion of the outer periphery of the arrangement hole 18A.

  On the surface of the leg plate 16 on the leg plate 18 side, a cylindrical boss 17A is provided on the radially outer side of the arrangement hole 16A, and the boss 17A protrudes toward the leg plate 18 side. Further, a columnar boss 17B is provided on the surface of the leg plate 16 on the side of the leg plate 18 so as to face the boss 17A via the arrangement hole 16A, and the boss 17B protrudes toward the leg plate 18 side. The boss 17A and the boss 17B are arranged concentrically with respect to the arrangement hole 16A.

  On the surface of the leg plate 18 on the leg plate 16 side, a cylindrical boss 19A is provided outside the arrangement hole 18A in the radial direction, and the boss 19A protrudes toward the leg plate 16 side. Further, a columnar boss 19B is provided on the surface of the leg plate 18 on the leg plate 16 side so as to face the boss 19A through the arrangement hole 18A, and the boss 19B protrudes toward the leg plate 18 side. The boss 19A and the boss 19B are arranged concentrically with respect to the arrangement hole 18A.

  Between the leg plate 16 and the leg plate 18, a long plate-like support bar 15 as a reinforcing member is stretched over the vehicle and on one side in the vehicle width direction, and the leg plate 16 and the leg plate 18 are separated from each other. The support bar 15 suppresses the frame 12 from being deformed in the direction, and the frame 12 is reinforced.

  Between the leg plate 16 and the leg plate 18, a protector 70 is disposed as a protective member made of resin.

  A disk-shaped ring 72 as a rotating portion is provided coaxially with the arrangement hole 16A on the leg plate 16 side portion of the protector 70, and the outer periphery of the ring 72 is arranged from the circumscribed circle 16C of the ratchet teeth 16B. It is arranged on the outer peripheral side of the hole 16A (the outer periphery of the ring 72 is larger than the circumscribed circle 16C). A circular hole 72A is formed through the center of the ring 72, and the circular hole 72A is disposed on the inner peripheral side of the arrangement hole 16A with respect to the inscribed circle 16D of the ratchet teeth 16B (the circular hole 72A is an inscribed circle). 16D). On the surface of the ring 72 on the leg plate 16 side, a sliding groove 73 having a rectangular cross section is provided between the circular hole 72A and the outer periphery of the ring 72. The sliding groove 73 extends in the circumferential direction of the ring 72. It is formed in an annular shape along. In the sliding groove 73, the boss 17A and the boss 17B of the leg plate 16 are slidably accommodated, and the ring 72 is rotatably supported with respect to the leg plate 16 (frame 12).

  A disk-shaped ring 74 as a rotating portion is provided coaxially with the arrangement hole 18A at a portion on the leg plate 18 side of the protector 70, and the outer periphery of the ring 74 is arranged from a circumscribed circle 18C of the ratchet teeth 18B. It is arranged on the outer peripheral side of the hole 18A (the outer periphery of the ring 74 is larger than the circumscribed circle 18C). A circular hole 74A is formed through the center of the ring 74, and the circular hole 74A is arranged on the inner peripheral side of the arrangement hole 18A with respect to the inscribed circle 18D of the ratchet teeth 18B (the circular hole 74A is an inscribed circle). Smaller than 18D). On the surface of the ring 74 on the leg plate 18 side, a sliding groove 75 having a rectangular cross section is provided between the circular hole 74 </ b> A and the outer periphery of the ring 74, and the sliding groove 75 extends in the circumferential direction of the ring 74. It is formed in an annular shape along. In the sliding groove 75, the boss 19A and the boss 19B of the leg plate 18 are slidably accommodated, and the ring 74 is rotatably supported by the leg plate 18 (frame 12).

  Between the ring 72 and the ring 74, a substantially rectangular base 76 as a passing portion is spanned on the vehicle upper side of the ring 72 and the ring 74, and the base 76 is integrated with the ring 72 and the ring 74. Molded. The base 76 is curved along the outer peripheral portions of the ring 72 and the ring 74, and the curved outer peripheral surface of the base 76 is flush with the outer peripheral surfaces of the ring 72 and the ring 74. A rectangular slit 78 as a passage hole is provided through the central portion of the base portion, and a webbing 30 described later is inserted through the slit 78.

  Between the leg plate 16 and the leg plate 18, a spool 20 as a winding shaft manufactured by die casting or the like is arranged coaxially with respect to the arrangement hole 16A and the arrangement hole 18A, and is rotatable. For this reason, the ring 72 and the ring 74 of the protector 70 and the spool 20 are coaxially arranged, and the ring 72 and the ring 74 are rotatable in the circumferential direction of the spool 20. The spool 20 has a drum shape as a whole. A base end portion of a webbing 30 formed in a long band shape is connected and fixed to the spool 20, and the webbing 30 extends from the spool 20. When the spool 20 is rotated around one of its axes (in the direction of arrow A in FIG. 1, this direction is hereinafter referred to as “winding direction”), the webbing 30 is layered on the outer periphery of the spool 20 from the base end side. Rolled up. On the other hand, if the webbing 30 is pulled from the front end side, the webbing 30 is pulled out while the spool 20 rotates around its axis (in the direction of arrow B in FIG. 1 and this direction is hereinafter referred to as “drawing direction”). Is done.

  A ring 72 of the protector 70 is disposed between the webbing 30 wound around the spool 20 and the webbing 30 extended from the spool 20 and the leg plate 16, and from the webbing 30 wound around the spool 20 and the spool 20. A ring 74 of the protector 70 is disposed between the extended webbing 30 and the leg plate 18. Further, the webbing 30 extends straight from the spool 20, is inserted into the base 76 (slit 78) of the protector 70, and extends from the frame 12 (see FIG. 3).

  A substantially cylindrical support shaft 22 is integrally provided on the leg plate 16 side of the spool 20, and the support shaft 22 protrudes to the outside of the leg plate 16 of the frame 12. A substantially rectangular column-shaped support shaft 24 is integrally provided on the leg plate 18 side of the spool 20, and the support shaft 24 is disposed coaxially with the support shaft 22 and protrudes outside the leg plate 18 of the frame 12. ing.

  Ratchet teeth 23 (external teeth) are formed on the entire outer periphery of the end portion of the spool 20 on the leg plate 18 side, and the ratchet teeth 23 are arranged in the arrangement hole 18A. By moving the spool 20 to the upper side of the vehicle, the ratchet teeth 23 can mesh with the ratchet teeth 18B of the leg plate 18.

  On the outer side of the leg plate 18 of the frame 12, a mainspring spring (not shown) as an urging means is arranged, and the outer end in the spiral direction of the mainspring spring is connected to the leg plate 18 (frame 12). The spiral spring inner end of the mainspring spring is fixed to the support shaft 24 of the spool 20, and the mainspring spring biases the spool 20 in the winding direction.

  Here, when the webbing 30 is wound around the outer periphery of the spool 20 by the urging force of the mainspring spring without being mounted on the occupant, the webbing 30 wound around the outer periphery of the spool 20 is wound up to the maximum. The outer diameter of the ring 72 and the outer diameter of the ring 74 are made larger than the outer diameter.

  A lock mechanism 40 is provided outside the leg plate 16 of the frame 12. The lock mechanism 40 includes a sensor holder (not shown) fixed to the leg plate 16, and the support shaft 22 is rotatably supported by the sensor holder.

  A lock base 41 is integrally provided at the end of the spool 20 on the leg plate 16 side, and the lock base 41 is disposed in the arrangement hole 16A. The lock base 41 is provided with a storage chamber 42, and the storage chamber 42 is opened toward the radially outer side of the spool 20. A plate-like lock plate 46 as a lock member is movably provided in the storage chamber 42. Ratchet teeth 46A are formed at one end of the lock plate 46, and the ratchet teeth 46A can be engaged with the ratchet teeth 16B of the leg plate 16 by moving the lock plate 46 radially outward of the spool 20. ing.

  Here, when the vehicle suddenly decelerates and when the webbing 30 is suddenly pulled out from the spool 20 and the spool 20 is suddenly rotated in the pull-out direction (at a predetermined time), the lock mechanism 46 locks the lock plate 46. The base 41 is moved outward in the radial direction (state shown in FIG. 2B). For this reason, the ratchet teeth 46 </ b> A of the lock plate 46 are engaged with the ratchet teeth 16 </ b> B of the leg plate 16 of the frame 12. This restricts rotation of the spool 20 (lock base 41) in the pull-out direction (rotation of the lock plate 46 and the spool 20 in the winding direction is permitted).

  Further, at this time, the spool 20 is moved upward by the pulling output of the webbing 30 from the spool 20, whereby the ratchet teeth 23 of the spool 20 are moved to the leg plate 18 of the frame 12 (the vehicle on the outer periphery of the arrangement hole 18 </ b> A). It is meshed with the ratchet teeth 18B on the upper side). Thereby, the rotation of the spool 20 in the pull-out direction is reliably restricted.

  Next, the operation of the present embodiment will be described.

  In the webbing take-up device 10, when the webbing 30 wound on the spool 20 is pulled toward the tip side against the urging force of the mainspring spring, the webbing 30 is pulled out from the spool 20 and the spool 20 is pulled out. Rotated in the direction.

  The pulled-out webbing 30 is hung around the occupant's body, and for example, a tongue plate provided in the middle in the longitudinal direction of the webbing 30 is held by a buckle device provided on the side of the vehicle seat, The webbing 30 is attached to the occupant's body.

  When the vehicle suddenly decelerates and when the webbing 30 is suddenly pulled out from the spool 20 and the spool 20 is suddenly rotated in the pull-out direction, the lock mechanism 46 causes the lock plate 46 to move radially outward of the lock base 41. Moved. For this reason, the ratchet teeth 46 </ b> A of the lock plate 46 are engaged with the ratchet teeth 16 </ b> B of the leg plate 16 of the frame 12. This restricts rotation of the spool 20 (lock base 41) in the pull-out direction (rotation of the lock plate 46 and the spool 20 in the winding direction is permitted).

  Further, at this time, the spool 20 is moved upward by the pulling output from the spool 20 acting on the webbing 30 due to the inertia force of the occupant forward of the vehicle, etc., so that the ratchet teeth 23 of the spool 20 are moved to the frame. 12 ratchet teeth 18B of the leg plates 18 (the vehicle upper portion of the outer peripheral portion of the arrangement hole 18A). Thereby, the rotation of the spool 20 in the pull-out direction is reliably restricted.

  By the way, when the webbing 30 is moved to the leg plate 16 side or the leg plate 18 side of the frame 12, the webbing 30 is inserted into the base 76 (slit 78) of the protector 70. By being restricted, the webbing 30 is prevented from coming into contact with the leg plate 16 or the leg plate 18 in particular. For this reason, the webbing 30 can be protected from the frame 12 by the base 76.

  Further, when the webbing 30 is wound around the spool 20 and when the webbing 30 is pulled out from the spool 20, the base 76 is rotated following the webbing 30 extended from the spool 20, so that the webbing 30. The protector 70 (the ring 72, the ring 74, and the base 76) is rotated relative to the frame 12 in accordance with the amount of winding on the spool 20.

  For this reason, the friction between the base 76 and the webbing 30 is reduced. Thereby, when the webbing 30 is wound around the spool 20, the webbing 30 can be favorably wound around the spool 20 by the mainspring spring. Further, when the webbing 30 is pulled out from the spool 20, the pulling resistance of the webbing 30 from the spool 20 can be reduced, so that the pulling feeling of the webbing 30 can be improved.

  Further, even when the direction of the webbing 30 extending from the spool 20 is changed by the vehicle on which the webbing take-up device 10 is installed, the base 76 is rotated following the webbing 30 extending from the spool 20. Thus, the protector 70 (ring 72, ring 74, and base 76) is rotated relative to the frame 12. Therefore, also in this case, when the webbing 30 is wound around the spool 20, the webbing 30 can be satisfactorily wound around the spool 20 by the mainspring spring, and when the webbing 30 is pulled out from the spool 20, the webbing The drawing resistance from the 30 spools 20 can be reduced. Thereby, the webbing take-up device 10 can be appropriately installed in different vehicles.

  Further, when the webbing 30 is wound around the spool 20 and when the webbing 30 is pulled out from the spool 20, the base 76 is rotated following the webbing 30 extended from the spool 20. For this reason, even if the width of the slit 78 with respect to the thickness direction of the webbing 30 is narrowed, the friction between the base 76 and the webbing 30 can be reduced. Thereby, when the webbing 30 is wound around the spool 20 and when the webbing 30 is pulled out from the spool 20, the webbing 30 can be prevented from being twisted.

  Here, the ring 72 of the protector 70 is disposed between the webbing 30 wound around the spool 20 and the webbing 30 extended from the spool 20 and the leg plate 16 of the frame 12, and is provided on the entire circumference of the spool 20. It has been. The ring 74 of the protector 70 is disposed between the webbing 30 wound around the spool 20 and the webbing 30 extended from the spool 20 and the leg plate 18 of the frame 12, and is provided on the entire circumference of the spool 20. ing. Further, the protector 70 (ring 72, ring 74 and base 76) is rotatable in the circumferential direction of the spool 20.

  For this reason, even if the webbing 30 is wound around the spool 20, the rotation of the ring 72 and the ring 74 of the protector 70 is not limited. Further, the rotation of the protector 70 is not limited to the back plate 14 or the support bar 15. Therefore, the rotatable range of the base 76 can be expanded, and the selection range of the extension angle of the webbing 30 from the spool 20 can be expanded.

  Further, the webbing 30 needs to be extended straight from the spool 20 and inserted into the base 76 (slit 78) of the protector 70 and extended from the frame 12, but as described above, the base 76 can be rotated. Since the range can be expanded, the selection range of the extending angle of the webbing 30 from the frame 12 can be expanded, and the selection range of the mounting angle of the frame 12 to the vehicle can be expanded.

  Further, the ring 72 and the ring 74 can protect the webbing 30 against the leg plate 16 and the leg plate 18 around the entire circumference of the spool 20. Thereby, the protection with respect to the flame | frame 12 of the webbing 30 by the protector 70 can be improved.

  Further, the ring 72 is annularly arranged around the periphery of the arrangement hole 16A of the leg plate 16 (ratchet teeth 16B), and the ring 74 is annular around the periphery of the arrangement hole 18A of the leg plate 18 (ratchet teeth 18B). Is arranged.

  For this reason, when the webbing 30 is wound around the spool 20 and when the webbing 30 is pulled out from the spool 20, the webbing 30 is brought into contact with the ring 72 and the ring 74, and the arrangement hole of the leg plate 16 of the frame 12 is arranged. The sliding contact with the peripheral edge of the 16A (ratchet teeth 16B) and the peripheral edge of the arrangement hole 18A of the leg plate 18 (ratchet teeth 18B) is suppressed. Thereby, the webbing 30 can be protected from the frame 12 by the ring 72 and the ring 74.

  Further, when the ratchet teeth 46A of the lock plate 46 and the ratchet teeth 23 of the spool 20 are engaged with the ratchet teeth 16B and 18B of the frame 12, respectively, and the rotation of the spool 20 in the pull-out direction is restricted, the ratchet teeth 46A The webbing 30 can be protected against the meshing of the ratchet teeth 16B and the ratchet teeth 23 with the ratchet teeth 18B.

  Further, even when the protector 70 is rotated relative to the frame 12 according to the winding amount of the webbing 30 onto the spool 20, the ring 72 and the ring 74 are rotated coaxially with respect to the spool 20. The region for protecting the webbing 30 of the ring 72 and the ring 74 does not change. For this reason, since the ring 72 and the ring 74 are still arrange | positioned in the perimeter of the spool 20, the protection with respect to the flame | frame 12 of the webbing 30 by the protector 70 can be improved effectively.

  Furthermore, when the webbing 30 is wound up to the outer periphery of the spool 20 by the spring force of the mainspring spring without being mounted on the occupant, the outer diameter of the webbing 30 wound on the outer periphery of the spool 20 is reduced. In comparison, since the outer diameter of the ring 72 and the outer diameter of the ring 74 are increased, the webbing 30 can be further protected from the frame 12 by the ring 72 and the ring 74.

  In the first embodiment, the frame 12 is provided with the boss 17A, the boss 17B, the boss 19A, and the boss 19B, and the protector 70 is provided with the sliding groove 73 and the sliding groove 75. Instead of this, the frame 12 may be provided with a sliding groove, and the protector 70 may be provided with a boss.

  [Second Embodiment]

  FIG. 4 is a perspective view of the frame 12 and the protector 70 of the webbing retractor 100 according to the second embodiment of the present invention. 5A shows a side view of the frame 12 and the protector 70 of the webbing take-up device 100, and FIG. 5B shows a cross-sectional view of the frame 12 and the protector 70. It is shown. In the drawings, one side in the vehicle front-rear direction is indicated by an arrow LO, one side in the vehicle width direction is indicated by an arrow WO, and the upper side of the vehicle is indicated by an arrow UP.

  The webbing take-up device 100 according to the present embodiment has substantially the same configuration as that of the first embodiment, but differs in the following points.

  As shown in FIGS. 4 and 5A and 5B, a sliding surface 102 is formed on the outer peripheral portion of the leg plate 16 of the frame 12 as a sliding portion at the vehicle upper side and the back plate 14 side. Has been. In addition, a sliding surface 104 is formed on the outer peripheral portion of the leg plate 16 as a sliding portion at a portion on the lower side of the vehicle and opposite to the back plate 14. The sliding surface 102 and the sliding surface 104 are arranged concentrically with the arrangement hole 16A.

  A sliding surface 106 is formed on the outer peripheral portion of the leg plate 18 of the frame 12 as a sliding portion on the vehicle upper side and the back plate 14 side. In addition, a sliding surface 108 is formed on the outer peripheral portion of the leg plate 18 as a sliding portion at a portion on the lower side of the vehicle and opposite to the back plate 14. The sliding surface 106 and the sliding surface 108 are arranged concentrically with the arrangement hole 18A.

  The base 76 of the protector 70 is disposed on the radially outer side of the ring 72 and the ring 74 from the outer peripheral surfaces of the ring 72 and the ring 74. An end portion of the base 76 on the leg plate 16 side protrudes to the outside of the ring 72 and serves as a load receiving portion 172 as a supporting portion and a sliding portion. The inner surface of the load receiving portion 172 in the radial direction of the ring 72 is slidable on the sliding surface 102 of the leg plate 16. An end portion of the base 76 on the leg plate 18 side protrudes to the outside of the ring 74 and serves as a load receiving portion 174 as a supporting portion and a sliding portion. The inner surface of the load receiving portion 174 in the radial direction of the ring 74 is slidable on the sliding surface 106 of the leg plate 18.

  On the outer periphery of the ring 72, a load receiving portion 173 having a substantially rectangular cross section as a supporting portion and a sliding portion is provided at a position facing the load receiving portion 172 through the circular hole 72A. The portion 173 is curved along the outer peripheral portion of the ring 72. The load receiving portion 173 protrudes toward the leg plate 16, and the inner surface of the load receiving portion 173 in the radial direction of the ring 72 is slidable on the sliding surface 104 of the leg plate 16.

  A load receiving portion 175 having a substantially rectangular cross section as a support portion and a sliding portion is provided on the outer peripheral portion of the ring 74 at a position facing the load receiving portion 174 through the circular hole 74A. The portion 175 is curved along the outer peripheral portion of the ring 74. The load receiving portion 175 protrudes toward the leg plate 18, and the inner surface of the load receiving portion 175 in the radial direction of the ring 74 is slidable on the sliding surface 108 of the leg plate 18.

  For this reason, the load receiving portion 172 and the load receiving portion 173 of the protector 70 are slidably supported by the sliding surface 102 and the sliding surface 104 of the leg plate 16 of the frame 12, respectively. Load receiving portions 175 are slidably supported on the sliding surface 106 and the sliding surface 108 of the leg plate 18 of the frame 12, respectively. As a result, the protector 70 is rotatable relative to the frame 12, and the protector 70 is rotated relative to the frame 12 in accordance with the winding amount of the webbing 30 around the spool 20.

  Therefore, the present embodiment has the same operational effects as the first embodiment.

  Further, when the protector 70 is rotated relative to the spool 20 according to the winding amount of the webbing 30 on the spool 20, when the vehicle suddenly decelerates, or when the webbing 30 is suddenly pulled out from the spool 20, the spool When a load is applied from the webbing 30 to the protector 70 when the 20 is suddenly rotated in the pulling direction, the load is received by the load receiving portion 172, the load receiving portion 173, the load receiving portion 174, and the load of the protector 70. The sliding surface 102 and the sliding surface 104 of the leg plate 16 and the sliding surface 106 and the sliding surface 108 of the leg plate 18 are received via the receiving portion 175.

  Even in this case, the length of the load receiving portion 172 and the load receiving portion 173 in the circumferential direction of the ring 72 (the length of the load receiving portion 172 and the load receiving portion 173 in the sliding direction) and the load receiving portion 174 and the load receiving portion 175 The length in the circumferential direction of the ring 74 (the length in the sliding direction of the load receiving portion 174 and the load receiving portion 175) is increased, and the sliding surface 102, the sliding surface 104, the sliding surface 106, and the sliding surface 108 are increased. The surface pressure acting on the load receiving portion 172, the load receiving portion 173, the load receiving portion 174, and the load receiving portion 175 is reduced. Thereby, a deformation | transformation of the load receiving part 172, the load receiving part 173, the load receiving part 174, and the load receiving part 175 can be suppressed, and it can suppress that the protector 70 remove | deviates from the flame | frame 12.

  In the first embodiment and the second embodiment, the protector 70 is rotatably supported by the frame 12. Instead of this, the protector 70 may be rotatably supported by the spool 20. In this case, for example, the circular hole 72A of the ring 72 is rotatably supported on the outer peripheral portion of the lock base 41 of the spool 20, and the circular hole 74A of the ring 74 is supported on the inner side in the axial direction from the ratchet teeth 23 of the spool 20. Is done.

  Further, in the first embodiment and the second embodiment, the protector 70 is made of resin, but the material of the protector 70 is not limited to this. For example, the protector 70 may be made of a material having a lower strength than the frame 12.

10 Webbing take-up device 12 Frame 20 Spool (winding shaft)
30 Webbing 70 Protector (Protective member)
72 Ring (rotating part)
74 Ring (rotating part)
76 Base (Passing part)
172 Load receiving part (supporting part)
173 Load receiving part (supporting part)
174 Load receiving part (supporting part)
175 Load receiving part (supporting part)

Claims (2)

A winding shaft that is wound by rotating a webbing that is mounted on a vehicle occupant in the winding direction, and that is rotated in the pulling direction by pulling out the webbing;
A frame for supporting both ends of the winding shaft;
A rotating part provided on the entire circumference of the take-up shaft and made rotatable with respect to the take-up shaft and the frame in the circumferential direction of the take-up shaft, and provided integrally with the rotary part. A protective member having a passing portion through which the extended webbing passes, and being rotated according to a variation in a winding amount of the webbing to the winding shaft, and protecting the webbing away from the frame; ,
A webbing take-up device comprising:   The webbing take-up device according to claim 1, wherein the protection member has a support portion that is slidably supported on an outer peripheral portion of the frame.

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