JP2010076682A - Webbing rolling-up device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To stop movement of a movement member and to suppress increase of weight and size. <P>SOLUTION: In the webbing rolling-up device 10, a rack tooth 52A of a piston 50 is engaged with a pinion tooth 34A of a pinion 32 by moving the piston 50, and the pinion 32 is rotated in a rolling-up direction. Here, a deformation member 54 is attached to a space between the rack teeth 52A of a lower part of the rack 52. Thereby, when the rack tooth 52A of the lower part of the rack 52 is engaged with the pinion tooth 34A, movement energy of the piston 50 is absorbed by elastically deforming or plastically deforming a deformation member 54 by the pinion tooth 34A. Therefore, when the rack tooth 52B at the lowermost end of the rack 52 is engaged with the pinion tooth 34A, movement of the piston 50 can be stopped. Accordingly, movement of the piston 50 can be stopped by a relationship of the piston 50 and the pinion 32, and the increase of the weight and size can be suppressed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a webbing take-up device for taking up a webbing on a take-up shaft in the event of an emergency of a vehicle.

  In the webbing take-up device described in Patent Literature 1 below, the pinion gear body is rotated by moving the rack in the pretensioner mechanism. Accordingly, the winding drum is rotated integrally with the pinion gear body, and the webbing is wound around the winding drum.

However, in this webbing take-up device, the movement of the rack is stopped when the rack to be moved contacts the first contact portion of the housing body and the second contact portion and the end portion of the cover body. For this reason, it is necessary to increase the strength so that the contact load of the rack is absorbed by the housing body and the cover body.
JP 2003-335217 A

  In view of the above facts, the present invention has an object to obtain a webbing take-up device capable of stopping the movement of the moving member and suppressing an increase in weight and an increase in size.

  The webbing take-up device according to claim 1 is provided with a take-up shaft for taking up the webbing attached to the vehicle occupant in the take-up direction and a plurality of rotating teeth, and is rotated in a predetermined direction. Thus, a rotating member for rotating the winding shaft in the winding direction and a plurality of moving teeth are provided, and the moving teeth are meshed with the rotating teeth by moving to one side in the event of a vehicle emergency. A moving member that rotates the rotating member in a predetermined direction; and a deforming member that is provided on one side of the moving tooth on the other side of the moving member and is deformed by the rotating tooth that meshes with the moving tooth. Yes.

  The webbing take-up device according to claim 2 is provided with a take-up shaft for taking up the webbing attached to the vehicle occupant in the take-up direction and a plurality of rotating teeth, and is rotated in a predetermined direction. Thus, a rotating member for rotating the winding shaft in the winding direction and a plurality of moving teeth are provided, and the moving teeth are meshed with the rotating teeth by moving to one side in the event of a vehicle emergency. A rotating member that rotates the rotating member in a predetermined direction and has increased meshing resistance to the rotating tooth in the moving tooth on the other side compared to the moving tooth on one side.

  The webbing take-up device according to claim 3 is provided with a take-up shaft for taking up the webbing attached to the vehicle occupant in the take-up direction and a plurality of rotating teeth, and is rotated in a predetermined direction. Thus, a rotating member for rotating the winding shaft in the winding direction and a plurality of moving teeth are provided, and the moving teeth are meshed with the rotating teeth by moving to one side in the event of a vehicle emergency. A moving member that rotates the rotating member in a predetermined direction; and provided on the moving tooth at the other end of the moving member, the rotating tooth abuts to stop the movement of the moving member, and the moving tooth And a contact surface protruding toward the rotating member as compared with the different moving teeth.

  In the webbing retractor according to claim 1, when the vehicle is in an emergency, the moving member is moved to one side so that the moving tooth of the moving member is engaged with the rotating tooth of the rotating member, and the rotating member is in a predetermined direction. Is rotated to. As a result, the take-up shaft is rotated in the take-up direction, and the webbing attached to the vehicle occupant is taken up by the take-up shaft.

  Here, the deformation member is provided on one side of the moving tooth on the other side of the moving member, and the deforming member is deformed by the rotating tooth with which the moving tooth meshes. For this reason, the movement energy of a moving member can be absorbed and the movement of a moving member can be stopped. Thereby, the movement of the moving member can be stopped due to the relationship between the moving member and the rotating member. Therefore, it is not necessary to stop the movement of the moving member by another functional component, it is possible to eliminate the need to increase the strength of the other functional component, and it is possible to suppress an increase in weight and an increase in size.

  In the webbing take-up device according to claim 2, when the vehicle is in an emergency, the moving member is moved to one side so that the moving tooth of the moving member is engaged with the rotating tooth of the rotating member, and the rotating member is in a predetermined direction. Is rotated to. As a result, the take-up shaft is rotated in the take-up direction, and the webbing attached to the vehicle occupant is taken up by the take-up shaft.

  Here, in the moving member, the meshing resistance to the rotating tooth is increased in the moving tooth on the other side as compared with the moving tooth on the one side. For this reason, the movement energy of the moving member can be absorbed and the movement of the moving member can be stopped by meshing the moving tooth on the other side of the moving member with the rotating tooth. Thereby, the movement of the moving member can be stopped due to the relationship between the moving member and the rotating member. Therefore, it is not necessary to stop the movement of the moving member by another functional component, it is possible to eliminate the need to increase the strength of the other functional component, and it is possible to suppress an increase in weight and an increase in size.

  In the webbing take-up device according to claim 3, when the vehicle is in an emergency, the moving member is moved to one side so that the moving tooth of the moving member is engaged with the rotating tooth of the rotating member, and the rotating member is in a predetermined direction. Is rotated to. As a result, the take-up shaft is rotated in the take-up direction, and the webbing attached to the vehicle occupant is taken up by the take-up shaft.

  Here, a contact surface is provided on the moving tooth at the other end of the moving member, and the rotating tooth of the rotating member contacts the contacting surface, and the movement of the moving member is stopped. Thereby, the movement of the moving member can be stopped due to the relationship between the moving member and the rotating member. Therefore, it is not necessary to stop the movement of the moving member by another functional component, it is possible to eliminate the need to increase the strength of the other functional component, and it is possible to suppress an increase in weight and an increase in size.

  Further, the contact surface protrudes toward the rotating member as compared to a moving tooth different from the moving tooth (a moving tooth having no contact surface). For this reason, the movement of the moving member can be reliably stopped by the contact of the rotating teeth of the rotating member with the contact surface.

[First Embodiment]
FIG. 1 shows a side view of a webbing take-up device 10 according to a first embodiment of the present invention viewed from one side in the vehicle front-rear direction, and FIG. 2 shows the webbing take-up device 10. It is shown in a cross-sectional view seen from the inside in the vehicle width direction. In the drawings, the inner side in the vehicle width direction is indicated by an arrow IN, one side in the vehicle longitudinal direction is indicated by an arrow LO, and the upper side is indicated by an arrow UP.

  As shown in FIG. 2, the webbing take-up device 10 according to the present embodiment is provided with a frame 12 having a U-shaped cross section, and the frame 12 includes a back plate 12A on the inner side in the vehicle width direction and a vehicle. A leg plate 12B on one side in the front-rear direction and a leg plate 12C on the other side in the vehicle front-rear direction are provided. The frame 12 is fixed to the vehicle at the back plate 12A, whereby the webbing take-up device 10 is installed in the vehicle.

  A substantially circular ratchet hole 14 is formed through the leg plate 12 </ b> C of the frame 12, and a plurality of ratchet teeth 14 </ b> A (inner teeth) are formed on the entire outer periphery of the ratchet hole 14. The ratchet hole 14 (including the ratchet teeth 14A) constitutes the lock mechanism 24 described below.

  Between the leg plate 12B and the leg plate 12C of the frame 12, a substantially cylindrical spool 18 as a winding member constituting the winding shaft 16 is rotatably disposed. A long belt-like webbing 20 (belt) is wound around the outer periphery of the spool 18 from the base end side, and the webbing 20 extends upward from the frame 12 and is seated on a vehicle seat (not shown). To be worn by the crew. Further, when the spool 18 is rotated in the winding direction (the direction of arrow A in FIG. 1 and the like), the webbing 20 is wound around the spool 18 and the webbing 20 is pulled out from the spool 18 so that the spool 18 is pulled out. It is rotated in the direction (arrow B direction in FIG. 1 and the like).

  A torsion shaft 22 as a rotating shaft (energy absorbing member) constituting a winding shaft 16 and a force limiter mechanism is coaxially inserted in the spool 18. One end 22A of the torsion shaft 22 on the leg plate 12B side protrudes from one end surface of the spool 18 on the leg plate 12B side and protrudes outside the leg plate 12B of the frame 12. A connecting portion 22C is provided in the vicinity of one end 22A of the torsion shaft 22, and the connecting portion 22C is connected (inserted) into one end of the spool 18 so as to be integrally rotatable. As a result, the torsion shaft 22 can rotate integrally with the spool 18.

  A lock mechanism 24 as a restricting means is provided on the leg plate 12C side of the spool 18, and the lock mechanism 24 is provided with a lock base 25 as a lock member.

  A substantially cylindrical sleeve portion 25A is provided on the spool 18 side portion of the lock base 25, and the sleeve portion 25A is rotatably mounted in the other end of the spool 18 on the leg plate 12C side. In the sleeve portion 25A, the other end 22B of the torsion shaft 22 on the leg plate 12C side is connected (inserted) so as to be integrally rotatable, and the lock base 25 is integrally rotatable with the torsion shaft 22 and the spool 18. Yes.

  A main body portion 25B is provided on a portion of the lock base 25 opposite to the spool 18 side, and a lock plate 26 as a regulating member is slidably held on the main body portion 25B. The main body 25B is disposed in the ratchet hole 14 of the leg plate 12C, and a lock tooth 26A is formed at one end of the lock plate 26.

  The lock mechanism 24 is provided with a sensor mechanism 28 as detection means, and the sensor mechanism 28 is disposed outside the leg plate 12 </ b> C of the frame 12. The sensor mechanism 28 can detect a vehicle emergency (particularly a vehicle collision). When the sensor mechanism 28 detects an emergency of the vehicle, as shown in FIG. 4, the sensor mechanism 28 slides the lock plate 26 with respect to the lock base 25, so that the lock teeth 26 </ b> A of the lock plate 26 are in the ratchet hole 14. It meshes with the outer ratchet teeth 14A. Thereby, the rotation of the lock base 25, the torsion shaft 22 and the spool 18 in the pull-out direction is restricted (locked) (the rotation of the lock base 25, the torsion shaft 22 and the spool 18 in the winding direction is permitted).

  As shown in FIGS. 1 and 2, a rack and pinion type pretensioner mechanism 30 as a winding means is provided outside the leg plate 12B of the frame 12.

  The pretensioner mechanism 30 is provided with a pinion 32 as a rotating member. A gear 34 is provided on a portion of the pinion 32 opposite to the leg plate 12B, and a plurality of pinion teeth 34A as rotating teeth are provided on the entire outer periphery of the gear 34.

  A substantially bottomed cylindrical clutch portion 36 is provided on the legion 12B side portion of the pinion 32, and one end 22A of the torsion shaft 22 is rotatably disposed in the clutch portion 36. A predetermined number (five in this embodiment) of concave portions 36A are formed on the inner peripheral surface of the clutch portion 36, and the predetermined number of concave portions 36A are arranged at equal intervals in the circumferential direction of the clutch portion 36. At the same time, the depth is gradually reduced as it goes in the drawing direction.

  A predetermined number (five in the present embodiment) of cylindrical rollers 38 serving as clutch members are accommodated in the clutch portion 36 outside the one end 22A of the torsion shaft 22. Is disposed in the winding direction side portion of the recess 36A.

  A bottomed cylindrical cylinder 40 as an accommodating member is provided below the pinion 32, and the cylinder 40 is disposed along the vertical direction. The cylinder 40 is fixed to the leg plate 12 </ b> B of the frame 12, and the upper end of the cylinder 40 is opened below the pinion 32.

  A lower end (bottom) of the cylinder 40 is communicated with one end of a communication tube 42 having a substantially cylindrical shape. A gas generator 44 as a moving means is fixed to the other end of the communication tube 42, and the gas generator 44 closes the other end of the communication tube 42. The gas generator 44 is electrically connected to a vehicle control device 46, and a vehicle detection device 48 is electrically connected to the control device 46. The detection device 48 can detect the emergency state (collision) of the vehicle. When the detection device 48 detects the emergency state of the vehicle (when the vehicle collides), the pretensioner is controlled by the control device 46. By operating the mechanism 30, the gas generator 44 can instantaneously generate high-pressure gas and supply it to the lower end in the cylinder 40 via the communication cylinder 42.

  A piston 50 as a moving member is provided in the cylinder 40, and the piston 50 is movable in the vertical direction in the cylinder 40.

  The piston 50 is provided with a rectangular columnar rack 52 at a portion other than the lower end. The rack 52 protrudes from the cylinder 40, and the tip of the rack 52 is disposed near the lower side of the gear 34 of the pinion 32. A plurality of rack teeth 52 </ b> A as moving teeth are formed on the back plate 12 </ b> A side portion of the rack 52. The lowermost rack tooth 52A (hereinafter referred to as “rack tooth 52B”) is formed (extended) to the lower end of the rack 52, and no recess is formed below the rack tooth 52B.

  A deformable member 54 is mounted (filled) between the rack teeth 52A in the lower part of the rack 52, and the deformable member 54 is made into an elastic body and can be elastically deformed, or a plastic deformable body (energy such as a foamed resin material). Absorbing material) and plastically deformable.

  As shown in FIGS. 3 and 4, when the vehicle is in an emergency, the piston 50 receives the pressure of the high-pressure gas supplied from the gas generator 44 to the lower end of the cylinder 40 from the lower side (the other side), and the piston 50 Move to the upper side (one side). As a result, the rack 52 (rack teeth 52A) of the piston 50 is engaged with the gear 34 (pinion teeth 34A) of the pinion 32, and the pinion 32 is rotated in the winding direction (predetermined direction).

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

  In the webbing retractor 10 having the above configuration, in the emergency of the vehicle, in the lock mechanism 24, the sensor mechanism 28 slides the lock plate 26 with respect to the lock base 25, whereby the lock teeth 26A of the lock plate 26 are moved to the frame 12 ( The leg plate 12C) meshes with the ratchet teeth 14A on the outer periphery of the ratchet hole 14. As a result, the rotation of the lock base 25, the torsion shaft 22 and the spool 18 in the pull-out direction is restricted, so that the withdrawal of the webbing 20 from the spool 18 is restricted, and the occupant is restrained by the webbing 20.

  In an emergency of the vehicle, the pretensioner mechanism 30 is operated, so that the gas generator 44 instantaneously generates high-pressure gas and supplies it to the lower end in the cylinder 40 via the communication cylinder 42. For this reason, the piston 50 receives the pressure of the high-pressure gas from the lower side, and the piston 50 is moved upward. As a result, the rack 52 (rack teeth 52A) of the piston 50 is engaged with the gear 34 (pinion teeth 34A) of the pinion 32, and the pinion 32 is rotated in the winding direction.

  When the pinion 32 is rotated in the winding direction, the roller 38 between the inner periphery of the clutch portion 36 of the pinion 32 and the outer periphery of the one end 22A of the torsion shaft 22 causes the clutch to rotate as the pinion 32 rotates in the winding direction. The recess 36A of the portion 36 is moved from the winding direction side position to the drawing direction side position. Therefore, the roller 38 is engaged (engaged) between the clutch portion 36 (recess 36A) and the torsion shaft 22 (the outer peripheral surface of the one end 22A), and the pinion 32 and the torsion shaft 22 can rotate integrally. (See FIG. 4). As a result, the torsion shaft 22 and the spool 18 are rotated in the winding direction integrally with the pinion 32, and the webbing 20 is wound around the spool 18, whereby the restraining force of the occupant by the webbing 20 is increased.

  Here, a deformable member 54 is mounted between the rack teeth 52 </ b> A in the lower part of the rack 52. Thereby, when the pretensioner mechanism 30 is operated and the rack teeth 52A in the lower part of the rack 52 mesh with the pinion teeth 34A of the gear 34, the deformation member 54 is elastically deformed or plastically deformed by the pinion teeth 34A. Thus, the movement energy of the piston 50 is absorbed. For this reason, the movement of the piston 50 can be stopped when the rack teeth 52B at the lowermost end of the rack 52 mesh with the pinion teeth 34A (see FIG. 3). Therefore, the movement of the piston 50 can be stopped by the relationship between the piston 50 (rack 52) and the pinion 32 (gear 34). Thereby, it is not necessary to stop the movement of the piston 50 by other functional parts (such as the frame 12), it is possible to eliminate the need to increase the strength of the other functional parts, and it is possible to suppress an increase in weight and an increase in size.

  In addition, the deformation member 54 is elastically deformed or plastically deformed by the pinion teeth 34A, and the moving energy of the piston 50 is gradually absorbed, so that the moving speed of the piston 50 can be gradually reduced. The movement can be stopped gradually. For this reason, the movement of piston 50 can be stopped gently and it can control that piston 50 (rack 52) and pinion 32 (gear 34) are damaged.

[Second Embodiment]
FIG. 5 shows a side view of a webbing retractor 60 according to the second embodiment of the present invention viewed from one side in the vehicle front-rear direction.

  The webbing retractor 60 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 FIG. 5, in the webbing take-up device 60 according to the present embodiment, the deformation member 54 is not provided on the piston 50 (rack 52) in the pretensioner mechanism 30.

  In the rack 52, in the lower rack teeth 52A, the installation interval (pitch) of the rack teeth 52A is gradually decreased toward the lower side, and the gap between the rack teeth 52A is gradually decreased toward the lower side. Yes. In FIG. 5, the installation interval L2 of the rack teeth 52A is made smaller than the installation interval L1 of the rack teeth 52A, and the installation interval L3 of the rack teeth 52A is made smaller than the installation interval L2 of the rack teeth 52A. As a result, in the rack 52, in the lower rack teeth 52A, the meshing resistance of the rack teeth 52A to the pinion teeth 34A of the pinion 32 (gear 34) is gradually increased toward the lower side.

  Here, as described above, in the rack teeth 52A on the lower side of the rack 52, the installation interval of the rack teeth 52A is gradually reduced toward the lower side, so that the rack teeth to the pinion teeth 34A of the pinion 32 (gear 34). The meshing resistance of 52A is gradually increased as it goes downward. Thus, when the pretensioner mechanism 30 is operated and the rack teeth 52A on the lower side of the rack 52 mesh with the pinion teeth 34A of the gear 34, the rack teeth 52A slide with respect to the pinion teeth 34A, and the piston 50 Is absorbed, and the sliding force of the rack teeth 52A with respect to the pinion teeth 34A gradually increases toward the lower side, and the amount of absorption of the movement energy of the piston 50 is gradually increased. For this reason, the moving speed of the piston 50 can be gradually lowered, the movement of the piston 50 can be gradually stopped, and when the rack tooth 52B at the lowest end of the rack 52 meshes with the pinion teeth 34A, the piston 50 Can be stopped (see FIG. 6).

  Thereby, also in this embodiment, the same operation and effect as in the first embodiment can be obtained.

  In the present embodiment, in the rack teeth 52A on the lower side of the rack 52, the installation interval of the rack teeth 52A is gradually decreased toward the lower side, and the meshing resistance of the rack teeth 52A to the pinion teeth 34A is lowered. The configuration gradually increases as it goes, but as in the webbing take-up device 70 shown in FIG. 7, the depth of the gap 72 between the rack teeth 52A in the rack teeth 52A on the lower side of the rack 52 gradually increases. The meshing resistance of the rack teeth 52A to the pinion teeth 34A may be gradually increased toward the lower side.

[Third Embodiment]
FIG. 8 is a side view of a webbing retractor 80 according to the third embodiment of the present invention viewed from one side in the vehicle front-rear direction.

  The webbing take-up device 80 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 FIG. 8, in the webbing take-up device 80 according to the present embodiment, the deformation member 54 is not provided on the piston 50 (rack 52) in the pretensioner mechanism 30.

  In the rack 52, the protruding front end surface 82 of the rack tooth 52B at the bottom end is a contact surface, and the rack tooth 52B is closer to the back plate 12A side (the gear 34 side) than the other rack teeth 52A. The protruding height is increased.

  Here, as shown in FIG. 9, when the pretensioner mechanism 30 is operated and the rack teeth 52B at the lowermost end of the rack 52 mesh with the pinion teeth 34A, the pinion teeth 34A on the pulling direction side of the pinion teeth 34A. Is brought into contact with the protruding tip surface 82 of the rack tooth 52B, whereby the movement of the piston 50 is stopped.

  Furthermore, as described above, the rack teeth 52B have a higher protruding height toward the back plate 12A than the other rack teeth 52A. For this reason, the movement of the piston 50 can be stopped reliably by the pinion teeth 34A coming into contact with the protruding front end surface 82 of the rack teeth 52B.

  Thereby, also in this embodiment, the same operation and effect as the first embodiment can be obtained except that the movement of the piston 50 can be gently stopped.

[Fourth Embodiment]
FIG. 10 shows a side view of a webbing take-up device 100 according to a fourth embodiment of the present invention viewed from one side in the vehicle front-rear direction, and FIG. 11 shows the webbing take-up device 100. It is shown in a cross-sectional view seen from the inside in the vehicle width direction.

  The webbing retractor 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 FIG. 11, in the webbing take-up device 100 according to the present embodiment, the lock mechanism 24 is provided on the leg plate 12B side of the spool 18, and the leg plate 12C of the frame 12 is provided on the outer periphery of the ratchet hole 14. The ratchet teeth 14A are not formed. The lock base 25 and the lock plate 26 are not provided on the other end side of the spool 18, and the other end of the spool 18 is disposed in the ratchet hole 14 of the leg plate 12C.

  The other end 22B of the torsion shaft 22 is connected (inserted) in the other end of the spool 18 so as to be integrally rotatable, and the spool 18 is rotatable integrally with the torsion shaft 22. Further, one end 22 </ b> A is not provided on the leg plate 12 </ b> B side portion of the torsion shaft 22.

  The lock mechanism 24 on the leg plate 12B side of the spool 18 is provided with a lock gear 102 as a lock member.

  A substantially cylindrical sleeve portion 104 is provided on the spool 18 side portion of the lock gear 102, and the sleeve portion 104 is rotatably mounted in one end of the spool 18. A connecting portion 22 </ b> C of the torsion shaft 22 is connected (inserted) in the sleeve portion 104 so as to be integrally rotatable, and the lock gear 102 is integrally rotatable with the torsion shaft 22 and the spool 18.

  A gear portion 106 is provided on a portion of the lock gear 102 opposite to the spool 18, and the gear portion 106 protrudes from one end surface of the spool 18 and protrudes outside the leg plate 12 </ b> B of the frame 12. A cylindrical clutch recess 106A is formed on the surface of the lock gear 102 opposite to the spool 18, and the outer peripheral surface of the clutch recess 106A has a high friction coefficient. Ratchet teeth 106B (external teeth) are formed on the entire outer periphery of the gear portion 106.

  As shown in FIG. 10, the lock mechanism 24 is provided with a lock body 108 having a U-shaped cross section as a restricting member on the lower side of the gear portion 106 of the lock gear 102 and on the back plate 12A side of the frame 12. The body 108 is rotatably spanned between the leg plate 12B and the leg plate 12C of the frame 12. A lock plate 110 is formed at one end of the leg plate 12B of the lock body 108, and a lock tooth 110A is formed at the lock gear 102 side portion of the lock plate 110.

  The sensor mechanism 28 (not shown in the present embodiment) of the lock mechanism 24 is mainly disposed on the side opposite to the leg plate 12B of the pretensioner mechanism 30. When the sensor mechanism 28 detects an emergency of the vehicle, the sensor mechanism 28 rotates the lock body 108 (including the lock plate 110) toward the lock gear 102 as shown in FIG. The lock teeth 110A mesh with the ratchet teeth 106B on the outer periphery of the gear portion 106 of the lock gear 102. Thereby, the rotation of the lock gear 102, the torsion shaft 22 and the spool 18 in the pull-out direction is restricted (locked) (the rotation of the lock gear 102, the torsion shaft 22 and the spool 18 in the winding direction is permitted).

  As shown in FIG. 11, in the pretensioner mechanism 30, the clutch portion 36 of the pinion 32 is formed in a columnar shape, and the clutch portion 36 is rotatably accommodated in the clutch recess 106A of the lock gear 102 (gear portion 106). Yes. A predetermined number (five in this embodiment) of convex portions 36B are formed on the outer peripheral surface of the clutch portion 36, and the predetermined number of convex portions 36B are arranged at equal intervals in the circumferential direction of the clutch portion 36. In addition, the protrusion height is gradually increased as it goes in the drawing direction.

  A predetermined number (five in this embodiment) of rollers 38 are accommodated in the clutch recess 106A outside the clutch portion 36, and the rollers 38 are on the winding direction side of the convex portion 36B of the clutch portion 36. Placed in position.

  Here, as shown in FIG. 12, when the pretensioner mechanism 30 is operated and the pinion 32 is rotated in the winding direction in the event of an emergency of the vehicle, the outer periphery of the clutch portion 36 of the pinion 32 and the clutch recess of the lock gear 102 The roller 38 between the outer periphery of 106A is moved from the winding direction side position of the convex part 36B of the clutch part 36 to the drawing direction side position by the rotation of the pinion 32 in the winding direction. Therefore, the roller 38 is engaged (engaged) between the clutch portion 36 (the convex portion 36B) and the lock gear 102 (the outer peripheral surface of the clutch concave portion 106A), and the pinion 32 and the lock gear 102 can rotate integrally. To be. Accordingly, the lock gear 102, the torsion shaft 22 and the spool 18 are rotated in the winding direction integrally with the pinion 32, and the webbing 20 is wound around the spool 18.

  Thereby, also in this embodiment, the same operation and effect as in the first embodiment can be obtained.

  In this embodiment, the lock mechanism 24 is provided on the side of the leg plate 12B of the spool 18 in the first embodiment. However, in the second embodiment or the third embodiment, the lock mechanism 24 is provided. Similarly, the lock mechanism 24 may be provided on the leg plate 12B side of the spool 18.

1 is a side view of a webbing take-up device according to a first embodiment of the present invention viewed from one side in a vehicle front-rear direction. It is sectional drawing seen from the vehicle width direction inner side which shows the webbing winding device concerning a 1st embodiment of the present invention. It is the side view seen from the vehicle front-back direction 1 side which shows the emergency of the vehicle in the webbing winding device concerning a 1st embodiment of the present invention. It is sectional drawing seen from the vehicle width direction inner side which shows the emergency of the vehicle in the webbing winding device which concerns on the 1st Embodiment of this invention. It is the side view seen from the vehicle front-back direction one side which shows the webbing winding apparatus which concerns on the 2nd Embodiment of this invention. It is the side view seen from the vehicle front-back direction 1 side which shows the emergency of the vehicle in the webbing winding device concerning a 2nd embodiment of the present invention. It is the side view seen from the vehicle front-back direction one side which shows the webbing retractor which concerns on the modification of the 2nd Embodiment of this invention. It is the side view seen from the vehicle front-back direction one side which shows the webbing winding apparatus which concerns on the 3rd Embodiment of this invention. It is the side view seen from the vehicle front-back direction 1 side which shows the emergency of the vehicle in the webbing winding device concerning a 3rd embodiment of the present invention. It is the side view seen from the vehicle front-back direction one side which shows the webbing winding apparatus which concerns on the 4th Embodiment of this invention. It is sectional drawing seen from the vehicle width direction inner side which shows the webbing winding apparatus which concerns on the 4th Embodiment of this invention. It is the side view seen from the vehicle front-back direction 1 side which shows the emergency of the vehicle in the webbing winding device concerning a 4th embodiment of the present invention. It is sectional drawing seen from the vehicle width direction inner side which shows the emergency of the vehicle in the webbing winding apparatus which concerns on the 4th Embodiment of this invention.

Explanation of symbols

10 Webbing Winding Device 16 Winding Shaft 20 Webbing 32 Pinion 34A Pinion Teeth (Rotating Teeth)
50 Piston (moving member)
52A Rack teeth (moving teeth)
54 Deformation member 60 Webbing take-up device 70 Webbing take-up device 80 Webbing take-up device 82 Projecting tip surface (contact surface)
100 Webbing take-up device

Claims (3)

A winding shaft for winding a webbing attached to a vehicle occupant by rotating it in the winding direction;
A rotating member provided with a plurality of rotating teeth and rotating in the winding direction by rotating the winding shaft in a predetermined direction;
A moving member provided with a plurality of moving teeth and moving to one side in an emergency of the vehicle so that the moving teeth mesh with the rotating teeth and rotate the rotating member in a predetermined direction;
A deformable member provided on one side of the moving tooth on the other side of the moving member and deformed by the rotating tooth with which the moving tooth meshes;
A webbing take-up device comprising: A winding shaft for winding a webbing attached to a vehicle occupant by rotating it in the winding direction;
A rotating member provided with a plurality of rotating teeth and rotating in the winding direction by rotating the winding shaft in a predetermined direction;
A plurality of moving teeth are provided and moved to one side in the event of an emergency of the vehicle, so that the moving teeth mesh with the rotating teeth to rotate the rotating member in a predetermined direction, and compared with the moving teeth on one side. A moving member having increased meshing resistance to the rotating tooth in the moving tooth on the other side;
A webbing take-up device comprising: A winding shaft for winding a webbing attached to a vehicle occupant by rotating it in the winding direction;
A rotating member provided with a plurality of rotating teeth and rotating in the winding direction by rotating the winding shaft in a predetermined direction;
A moving member provided with a plurality of moving teeth and moving to one side in an emergency of the vehicle so that the moving teeth mesh with the rotating teeth and rotate the rotating member in a predetermined direction;
Provided on the moving tooth at the other end of the moving member, the rotating tooth abuts to stop the movement of the moving member, and to the rotating member side compared to the moving tooth different from the moving tooth A protruding contact surface;
A webbing take-up device comprising:

Images