WO2013118780A1 - プリテンショナ機構 - Google Patents
プリテンショナ機構 Download PDFInfo
- Publication number
- WO2013118780A1 WO2013118780A1 PCT/JP2013/052757 JP2013052757W WO2013118780A1 WO 2013118780 A1 WO2013118780 A1 WO 2013118780A1 JP 2013052757 W JP2013052757 W JP 2013052757W WO 2013118780 A1 WO2013118780 A1 WO 2013118780A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- locking pin
- pretensioner mechanism
- movement
- locking
- moving member
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R22/00—Safety belts or body harnesses in vehicles
- B60R22/34—Belt retractors, e.g. reels
- B60R22/46—Reels with means to tension the belt in an emergency by forced winding up
- B60R22/4628—Reels with means to tension the belt in an emergency by forced winding up characterised by fluid actuators, e.g. pyrotechnic gas generators
- B60R22/4633—Linear actuators, e.g. comprising a piston moving along reel axis and rotating along its own axis
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R22/00—Safety belts or body harnesses in vehicles
- B60R22/34—Belt retractors, e.g. reels
- B60R22/46—Reels with means to tension the belt in an emergency by forced winding up
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R22/00—Safety belts or body harnesses in vehicles
- B60R22/34—Belt retractors, e.g. reels
- B60R22/46—Reels with means to tension the belt in an emergency by forced winding up
- B60R22/4604—Reels with means to tension the belt in an emergency by forced winding up characterised by arrangements in vehicle or relative to seat belt
Definitions
- the present invention relates to a pretensioner mechanism in which an occupant's restraining force due to webbing is increased by moving a moving member.
- the bent plate-like position fixing piece locks the movement of the piston, and the position fixing piece is broken and the piston is moved, so that the gear is moved.
- the member is rotated, and the restraining force of the occupant due to the webbing is increased.
- the object of the present invention is to obtain a pretensioner mechanism that can effectively stabilize the behavior of the locking portion due to the movement of the moving member in consideration of the above facts.
- the pretensioner mechanism includes a webbing that is capable of restraining a vehicle occupant, a moving member that increases a restraining force of the occupant by the webbing and is moved in a columnar shape, and the movement The movement of the member is locked, and a chamfered surface is provided between the tip surface and the side surface, and the movement of the moving member is permitted by being broken, and an auxiliary portion is provided to move the moving member. And a locking portion that assists the radial crushing.
- the columnar locking portion locks the movement of the moving member, the locking portion is broken, and the moving member is moved, so that the occupant of the webbing can move.
- the binding force is increased.
- a chamfered surface is provided between the front end surface and the side surface of the locking portion.
- an auxiliary portion is provided in the locking portion, and the locking portion is assisted in the radial collapse due to the movement of the moving member. For this reason, a latching
- the pretensioner mechanism according to the second aspect of the present invention is the pretensioner mechanism according to the first aspect of the present invention, wherein the auxiliary portion is provided at a tip side portion of the locking portion.
- the auxiliary portion is provided at the tip side portion of the locking portion. For this reason, a latching
- the pretensioner mechanism according to the third aspect of the present invention is the pretensioner mechanism according to the first aspect or the second aspect of the present invention, wherein the auxiliary portion extends in the axial direction of the locking portion.
- the auxiliary portion extends in the axial direction of the locking portion. For this reason, a latching
- the pretensioner mechanism includes a webbing that is capable of restraining a vehicle occupant, a movable member that is movable, and the movement of the movable member is locked and is moved by being broken.
- a locking portion that allows movement of the member, a rotating member that is rotated by moving the moving member and increases the restraining force of the occupant by the webbing, and between the locking portion and the rotating member
- a suppressing portion that suppresses contact of the locking portion that is provided and broken to the rotating member.
- the locking portion locks the movement of the moving member, the locking portion is broken, and the moving member is moved to rotate the rotating member. The restraining force of the occupant due to webbing is increased.
- a suppressing portion is provided between the locking portion and the rotating member, and the contact of the locking portion with the suppressing portion being broken to the rotating member is suppressed. For this reason, the behavior of the locking portion due to the movement of the moving member can be effectively stabilized.
- FIG. 1B is a cross-sectional view taken along the line BB of FIG. 1A showing a main part of the pretensioner mechanism according to the embodiment of the present invention. It is the side view seen from the vehicle front-back direction one side which shows the principal part in the action
- FIG. 2B is a cross-sectional view taken along line BB of FIG. 2A showing a main part in the first stage of operation of the pretensioner mechanism according to the exemplary embodiment of the present invention.
- FIG. 3B is a cross-sectional view taken along the line BB of FIG. 3A showing a main part in the second operation stage of the pretensioner mechanism according to the exemplary embodiment of the present invention. It is the side view seen from the vehicle front-back direction one side which shows the principal part in the action
- FIG. 4B is a sectional view taken along the line BB of FIG. 4A showing the main part in the third stage of operation of the pretensioner mechanism according to the exemplary embodiment of the present invention.
- FIG. 5B is a cross-sectional view taken along the line BB of FIG. 5A showing the main part in the fourth stage of operation of the pretensioner mechanism relating to the exemplary embodiment of the present invention. It is the perspective view seen from the vehicle width direction inner side and the vehicle front-back direction one side which shows the gear case in the pretensioner mechanism which concerns on embodiment of this invention. It is the perspective view seen from the vehicle width direction inner side and the vehicle front-back direction one side which shows the principal part of the gear case in the pretensioner mechanism which concerns on embodiment of this invention.
- FIG. 8 shows an exploded perspective view of the webbing retractor 10 to which the pretensioner mechanism 36 according to the embodiment of the present invention is applied as seen from the vehicle width direction outer side and the vehicle front-rear direction one side.
- 9 is a side view of the webbing take-up device 10 as viewed from one side in the vehicle front-rear direction.
- the outer side in the vehicle width direction is indicated by an arrow OUT
- one side in the vehicle longitudinal direction is indicated by an arrow LO
- the upper side is indicated by an arrow UP.
- the webbing take-up device 10 is provided with a U-shaped plate-like frame 12 as a main body member.
- a back plate 12A, a leg plate 12B on one side in the vehicle front-rear direction, and a leg plate 12C on the other side in the vehicle front-rear direction are provided.
- the webbing take-up device 10 is fixed to a back plate 12A of the frame 12 in a rectangular cylindrical pillar (not shown) as a skeleton member of the vehicle, whereby the webbing take-up device 10 is installed in the vehicle. ing.
- a circular arrangement hole 14 and an arrangement hole 16 are formed so as to penetrate, respectively, and the arrangement hole 14 and the arrangement hole 16 are opposed to each other.
- a long rectangular first locking hole 18 is formed through the leg plate 12B on the upper side of the arrangement hole 14 and on the back plate 12A side, and the first locking hole 18 is arranged substantially horizontally.
- a long rectangular second locking hole 20 is formed through the leg plate 12B immediately below the first locking hole 18, and the second locking hole 20 is parallel to the first locking hole 18. Arranged and communicated with the first locking hole 18.
- the winding shaft 22 is rotatably supported between the leg plate 12B (arrangement hole 14) and the leg plate 12C (arrangement hole 16) of the frame 12.
- the take-up shaft 22 is provided with a substantially cylindrical spool 24 as a take-up member, and a long belt-like webbing 26 (belt) is wound on the spool 24 from the base end side.
- the webbing 26 extends upward from the frame 12, and the webbing 26 can be attached to an occupant seated on a vehicle seat (not shown). Further, when the spool 24 is rotated in the winding direction (the direction of arrow A in FIGS. 8 and 9), the webbing 26 is wound around the spool 24 and the webbing 26 is pulled out from the spool 24. The spool 24 is rotated in the drawing direction (the direction of arrow B in FIGS. 8 and 9).
- a torsion shaft 28 as an energy absorbing member constituting a force limiter mechanism is coaxially inserted in the spool 24, and one end 28 ⁇ / b> A on the leg plate 12 ⁇ / b> B side of the torsion shaft 28 is one end surface on the leg plate 12 ⁇ / b> B side of the spool 24. Protruding from.
- the other end 28B of the torsion shaft 28 on the leg plate 12C side is fixed to the other end of the spool 24 on the leg plate 12C side so as not to be relatively rotatable.
- the torsion shaft 28 is rotatable integrally with the spool 24.
- a substantially cylindrical lock gear 30 as a lock member is provided at one end of the spool 24, and a torsion shaft 28 is coaxially penetrated through the lock gear 30.
- a torsion shaft 28 is fixed to the lock gear 30 so as not to be relatively rotatable, and the lock gear 30 is rotatable integrally with the torsion shaft 28.
- ratchet teeth 30 ⁇ / b> A are formed on the entire outer periphery of the lock gear 30.
- a columnar clutch recess 32 constituting the clutch mechanism is formed on the surface of the lock gear 30 opposite to the spool 24, and the outer peripheral surface of the clutch recess 32 has a high friction coefficient.
- a mainspring spring (not shown) as an urging means is installed on the outer side of the leg plate 12C of the frame 12, and the mainspring spring is connected to the spool 24 so that an urging force is applied to the spool 24 in the winding direction. ing.
- a plate-like lock plate 34 as a restricting member is rotatably supported on the leg plate 12B of the frame 12 in the vicinity of the arrangement hole 14, and the lock plate 34 is formed with lock teeth 34A.
- the lock plate 34 is connected to a lock mechanism (not shown) as a restricting means (lock means), and the lock mechanism is activated when the webbing 26 is suddenly pulled out from the spool 24 or when the vehicle is suddenly decelerated.
- the lock plate 34 is rotated and the lock teeth 34 ⁇ / b> A are engaged (engaged) with the ratchet teeth 30 ⁇ / b> A of the lock gear 30.
- rotation of the lock gear 30 in the pull-out direction is restricted (locked), and rotation of the spool 24 in the pull-out direction is restricted (rotation in the winding direction of the spool 24 is allowed).
- a rack and pinion type pretensioner mechanism 36 is provided outside the leg plate 12B of the frame 12.
- the pretensioner mechanism 36 is provided with a resin-made substantially annular plate-like gear case 38 as a locking member, and the gear case 38 is fixed to the leg plate 12B.
- the outer peripheral portion of the gear case 38 covers the outer peripheral portion of the lock gear 30, and the clutch recess 32 of the lock gear 30 is disposed in the gear case 38 and one end 28 ⁇ / b> A of the torsion shaft 28 is penetrated.
- a predetermined number of cylindrical holding pins 40 (shear pins) as a holding portion are integrally formed on the outer peripheral portion of the gear case 38, and the holding pins 40 protrude from the gear case 38 to the side opposite to the lock gear 30. Yes.
- a substantially cylindrical locking pin 42 (shear pin) as a locking portion is integrally formed on the upper portion of the gear case 38. Is protruded from the gear case 38 to the side opposite to the leg plate 12B.
- a chamfered surface 42A (inclined surface) is formed between the peripheral surface (side surface) and the distal end surface at the distal end portion (protruding distal end portion) of the locking pin 42. The diameter is gradually reduced from the base end side (protruding base end side) toward the tip end side by the chamfered surface 42A.
- a columnar auxiliary hole 42B as an auxiliary portion is formed in the tip side portion of the locking pin 42, and the strength of the tip side portion of the locking pin 42 is reduced by the auxiliary hole 42B (locking pin).
- 42 indicates the axial range in which the auxiliary hole 42B of the locking pin 42 is formed).
- the auxiliary hole 42 ⁇ / b> B is disposed coaxially with the locking pin 42, extends (is elongated) in the axial direction (longitudinal direction) of the locking pin 42, and opens from the distal end surface of the locking pin 42. Has been.
- a substantially rectangular parallelepiped support portion 38A is formed at the upper portion of the gear case 38 at a portion closer to the leg plate 12B than the locking pin 42.
- the locking pin 42 is integrated with the lower portion of the support portion 38A at the upper portion and supported by the support portion 38A, and the lower portion of the locking pin 42 is not integrated with the gear case 38 ( Separated).
- the axial dimension X of the locking pin 42 is set to be smaller than the thickness dimension Y of the support portion 38A (it may be equal to or less than the thickness dimension Y of the support portion 38A). Further, the radius of curvature of the boundary portion between the locking pin 42 and the support portion 38A is reduced.
- a mortar-shaped (substantially trapezoidal cross-section) receiving part 38B is formed as a restraining part at a part below the locking pin 42.
- the upper side surface of the receiving part 38B is the gear case 38.
- the section along the circumferential direction is curved in a concave shape and is inclined in a direction toward the opposite side to the leg plate 12B as it goes downward.
- a substantially annular plate-shaped clutch plate 44 as a rotating member constituting the clutch mechanism is disposed on the opposite side of the gear case 38 from the lock gear 30.
- a predetermined number of semicircular mounting holes 46 are formed on the outer peripheral edge of the clutch plate 44, and the predetermined number of mounting holes 46 are arranged at equal intervals along the circumferential direction of the clutch plate 44.
- the holding hole 40 of the gear case 38 is fitted into the mounting hole 46, and thereby the clutch plate 44 is held by the gear case 38.
- a receiving portion 38 ⁇ / b> B of the gear case 38 is disposed between the clutch plate 44 and the locking pin 42 of the gear case 38, and the receiving portion 38 ⁇ / b> B is the locking pin 42 of the clutch plate 44.
- the entire thickness of the side portion is covered.
- a predetermined number (6 in the present embodiment) of L-shaped plate-like extending portions 48 are integrally formed on the inner periphery of the clutch plate 44, and the predetermined number of extending portions 48 are formed on the clutch plate 44. It arrange
- a columnar biting portion 48A is integrally formed at the tip of the extending portion 48. The biting portion 48A protrudes from the extending portion 48 toward the gear case 38, and the lock gear 30 is interposed via the inside of the gear case 38. Is inserted into the clutch recess 32.
- the biting portion 48 ⁇ / b> A is separated from the outer peripheral surface of the clutch recess 32, and the clutch plate 44 allows the lock gear 30 to rotate.
- a pinion 50 as a driving member is provided on the inner peripheral side of the clutch plate 44, and one end 28A of the torsion shaft 28 is coaxially penetrated through the pinion 50 so as to be relatively rotatable.
- a gear 52 is provided in the axially intermediate portion of the pinion 50, and pinion teeth 52 ⁇ / b> A are formed on the entire outer periphery of the gear 52.
- a cylindrical support cylinder 54 is formed coaxially on the opposite side of the pinion 50 from the lock gear 30.
- a clutch portion 56 constituting a clutch mechanism is formed on the lock gear 30 side portion of the pinion 50, and the clutch portion 56 is inserted into the clutch recess 32 of the lock gear 30.
- a predetermined number (six in this embodiment) of convex portions 56A are formed on the outer peripheral surface of the clutch portion 56, and the predetermined number of convex portions 56A are equally spaced along the circumferential direction of the clutch portion 56.
- the protrusion heights are gradually increased as they extend in the pull-out direction.
- the clutch portion 56 is fitted (pressed) with a biting portion 48A of the clutch plate 44 in the winding direction side portion of each convex portion 56A, whereby the pinion 50 is held by the clutch plate 44.
- a metal plate-like cover plate 58 as an assembling member is provided on the outer side of the leg plate 12B of the frame 12, and the cover plate 58 is a fixing screw as two fixing means at the upper back plate 12A side portion.
- 60 is fixed (fastened) to the leg plate 12B, and fixed (fastened) to the leg plate 12B by one fixing screw 60 at the lower back plate 12A side portion and the portion opposite to the back plate 12A. It is fixed to.
- the cover plate 58 covers the gear case 38, the clutch plate 44 and the pinion 50 from the side opposite to the lock gear 30.
- the support cylinder 54 of the pinion 50 is penetrated through the cover plate 58, and the cover plate 58 supports the pinion 50 in a freely rotatable manner.
- a substantially C-shaped K ring 62 as a fixing member is fitted and fixed to the support cylinder 54 of the pinion 50 on the opposite side of the leg plate 12B from the cover plate 58.
- the K ring 62 is fixed to the cover plate 58.
- the pinion 50 is restricted from being detached from the cover plate 58 by being locked to the cover.
- a long rectangular third locking hole 64 is formed through the upper portion of the cover plate 58, and the third locking hole 64 is disposed substantially horizontally so that the first locking hole 18 of the leg plate 12B. And opposed to the second locking hole 20.
- a cylindrical cylinder 66 made of metal as a cylindrical member is provided, and the cylinder 66 is located above the leg plate 12B and the cover plate 58. It has been extended.
- the cylinder 66 is fitted in a cylinder holder 68 having a substantially U-shaped cross section on the upper side of the cover plate 58, and the cylinder holder 68 is engaged with the upper part of the leg plate 12B at both ends in the longitudinal direction. It is fixed to 12B.
- the cylinder holder 68 holds the cylinder 66 by restricting the movement of the cylinder 66 in the radial direction.
- a peripheral edge 66 ⁇ / b> A is integrally formed at the lower end of the cylinder 66, and the peripheral edge 66 ⁇ / b> A protrudes from the entire outer periphery of the cylinder 66.
- the peripheral edge 66A is fitted into the upper part of the first locking hole 18 of the leg plate 12B and the third locking hole 64 of the cover plate 58.
- a substantially rectangular plate-like piston stopper 70 serving as a stopper member is disposed directly under the cylinder 66, and the piston stopper 70 is brought into contact (surface contact) with the lower end (including the peripheral edge portion 66A) of the cylinder 66.
- the second locking hole 20 of the leg plate 12B and the lower portion of the third locking hole 64 of the cover plate 58 are fitted. Accordingly, the movement of the piston stopper 70 and the movement of the cylinder 66 in the axial direction are locked, and the piston stopper 70 and the cylinder 66 are fixed between the leg plate 12B and the cover plate 58.
- a rectangular insertion hole 72 is formed through the piston stopper 70, and the inside of the cylinder 66 is opened above the pinion 50 through the insertion hole 72.
- a substantially cylindrical gas generator 74 serving as a gas supply means is inserted into the upper end of the cylinder 66, and the gas generator 74 closes the upper end of the cylinder 66.
- a bottomed cylindrical cap 76 as a fixing means is fixed to the upper end of the cylinder 66, and the upper wall (bottom wall) of the cap 76 is locked to the upper surface of the gas generator 74. Is fixed to the upper end of the cylinder 66.
- the gas generator 74 is electrically connected to a vehicle control device (not shown), and is controlled in the event of a vehicle collision (a predetermined opportunity that is an emergency of the vehicle when a vehicle collision is detected).
- a vehicle control device not shown
- the gas generator 74 instantaneously generates high-pressure gas and supplies it to the upper end in the cylinder 66.
- a metal piston 88 as a moving member is provided in the cylinder 66.
- a columnar base 90 is provided at the upper end of the piston 88, and the base 90 is arranged coaxially with the cylinder 66.
- the piston 88 is provided with a disk-shaped flange 92 immediately below the base 90, and the flange 92 is disposed coaxially with the cylinder 66 and protrudes from the entire outer periphery of the base 90. Is substantially fitted to the inner peripheral surface of the.
- An annular X-shaped X-ring 94 as a sealing member is disposed on the outer periphery of the base 90, and the X-ring 94 is made of rubber or the like and has elasticity and sealing properties.
- the X ring 94 is elastically deformed and is in contact with the entire circumference of the outer peripheral surface of the base 90, the upper surface of the flange 92, and the inner peripheral surface of the cylinder 66. The gap is sealed.
- the piston 88 is provided with a substantially rectangular columnar rack 96 below the flange 92, and a plurality of rack teeth 96 ⁇ / b> A are formed along the axial direction on the opposite side of the back plate 12 ⁇ / b> A of the rack 96.
- the rack 96 protrudes from the lower end of the cylinder 66 and is inserted into the insertion hole 72 of the piston stopper 70, and the rack teeth 96 ⁇ / b> A are locked to the locking pins 42 of the gear case 38, thereby lowering the piston 88.
- the lower end of the rack 96 is disposed in the vicinity of the upper side of the gear 52 of the pinion 50.
- the bottom surface (side surface of the support portion 38A) of the auxiliary hole 42B of the locking pin 42 in the gear case 38 is on the side opposite to the leg plate 12B with respect to the end surface on the leg plate 12B side of the rack 96 (rack teeth 96A).
- the auxiliary holes 42B are arranged only in the portion between the rack teeth 96A of the locking pin 42.
- the auxiliary holes 42B may be arranged at the same position as the end surface of the rack 96 (rack teeth 96A) on the leg plate 12B side. .
- the mainspring spring applies a biasing force in the take-up direction to the spool 24, so that the webbing 26 Looseness is removed.
- the pretensioner mechanism 36 is operated by the control of the control device, so that the gas generator 74 instantaneously generates high-pressure gas and supplies it to the upper end in the cylinder 66. For this reason, while the state where the cylinder 66 and the piston 88 are sealed with the X ring 94 is maintained, the piston 88 (base 90 and flange 92) and the X ring 94 increase the pressure of the gas from the upper side (the other side).
- the locking pin 42 of the gear case 38 that locks the rack 96 (rack teeth 96A) of the piston 88 is broken at the proximal end by the rack teeth 96A, and the piston 88 and the X ring 94 are on the lower side (one side). Moved to. As a result, the rack 96 (rack teeth 96A) of the piston 88 is engaged with the gear 52 (pinion teeth 52A) of the pinion 50, and the pinion 50 is rotated in the winding direction.
- the engaging portion 48A of the clutch plate 44 is moved from the winding direction side portion of the convex portion 56A of the clutch portion 56 of the pinion 50 to the drawing direction side portion.
- the extending portion 48 of the clutch plate 44 is deformed and moved to the outer peripheral side of the clutch plate 44, and the biting portion 48 ⁇ / b> A is moved to the outer peripheral surface side of the clutch recess 32 of the lock gear 30.
- the pinion 50 and the clutch are engaged when the biting portion 48A is bitten (engaged) between the clutch portion 56 (the peripheral surface of the convex portion 56A) and the lock gear 30 (the outer peripheral surface of the clutch concave portion 32).
- the plate 44, the lock gear 30, the torsion shaft 28 and the spool 24 are integrally rotatable.
- the holding pin 40 of the gear case 38 fitted into the mounting hole 46 of the clutch plate 44 is broken by the peripheral edge of the mounting hole 46, and the holding of the clutch plate 44 to the gear case 38 is released, whereby the pinion 50, The clutch plate 44, the lock gear 30, the torsion shaft 28, and the spool 24 are integrally rotated in the winding direction.
- the webbing 26 is wound around the spool 24, and the restraining force of the occupant by the webbing 26 is increased.
- the gear case is moved from the rack 96 (rack teeth 96 ⁇ / b> A) of the piston 88 due to the vibration of the piston 88 due to the vibration of the vehicle when the vehicle is normal (running or the like).
- a load acts on the 38 locking pins 42.
- the axial dimension X of the locking pin 42 is made smaller than the wall thickness dimension Y of the support portion 38A of the gear case 38. For this reason, the moment acting on the locking pin 42 from the piston 88 (rack tooth 96A) can be reduced.
- the bottom surface of the auxiliary hole 42B of the locking pin 42 is disposed on the side opposite to the leg plate 12B with respect to the end surface of the leg 96B on the rack 96 (rack teeth 96A). For this reason, the strength of the proximal end side portion of the locking pin 42 can be increased.
- the radius of curvature of the boundary portion between the locking pin 42 and the support portion 38A is reduced, and even when the auxiliary hole 42B is formed in the locking pin 42, the piston 88 (rack teeth 96A) is normal during the vehicle.
- the piston 88 rack teeth 96A
- the rack 96 (rack teeth 96A) is engaged with the gear 52 (pinion teeth 52A), and the pinion 50 is rotated in the winding direction, whereby the clutch portion of the pinion 50 is engaged.
- 56 (convex portion 56A) moves the engaging portion 48A of the clutch plate 44 toward the outer peripheral surface of the clutch recess 32 of the lock gear 30, and the clutch portion 56 (peripheral surface of the convex portion 56A) and the lock gear 30 (clutch concave portion 32). Between the outer peripheral surfaces of the two).
- the locking pin 42 is rotated downward about the base end side by the rack 96 (rack teeth 96A) and inserted (accommodated) into the upper side surface (recessed portion) of the receiving portion 38B of the gear case 38.
- the front end side portion of the locking pin 42 (the axial portion where the auxiliary hole 42B is formed) is disposed between the rack teeth 96A.
- the upward movement of the locking pin 42 (sliding movement with respect to the rack teeth 96A) due to the downward movement of the rack 96 (rack teeth 96A) is locked by the support portion 38A of the gear case 38.
- the holding pin 40 of the gear case 38 is broken by the periphery of the mounting hole 46 of the clutch plate 44, and the pinion 50, the clutch plate 44, and the lock gear 30 are integrally rotated in the winding direction.
- the rack 96 (rack teeth 96A) is moved in a state where the upward movement of the locking pin 42 due to the downward movement of the rack 96 (rack teeth 96A) is locked by the support portion 38A of the gear case 38.
- the distal end portion of the locking pin 42 is crushed and deformed (broken) in the radial direction at the upper portion.
- the pinion 50, the clutch plate 44, and the lock gear 30 are further rotated integrally in the winding direction.
- the rack 96 (rack teeth 96A) is moved in a state where the upward movement of the locking pin 42 due to the downward movement of the rack 96 (rack teeth 96A) is locked by the support portion 38A of the gear case 38. Due to the downward movement, the distal end portion of the locking pin 42 is also crushed and deformed (destroyed) in the radial direction in the lower portion and is cut (divided).
- the locking pin 42 is formed not only by the chamfered surface 42A but also by the auxiliary hole 42B of the rack 96 (rack teeth 96A).
- the locking pin 42 can be easily crushed and deformed in the radial direction by the downward movement of the rack 96 (rack tooth 96A), and can be cut, and the downward movement of the rack 96 (rack tooth 96A). It is possible to effectively stabilize the behavior of the locking pin 42, and to effectively inhibit the locking pin 42 from inhibiting the downward movement of the piston 88 (rack 96). Accordingly, the downward movement of the piston 88 can be effectively stabilized, and the operation performance of the pretensioner mechanism 36 can be effectively stabilized.
- the auxiliary hole 42B extends in the axial direction of the locking pin 42.
- the locking pin 42 can be more easily crushed and deformed in the radial direction by the downward movement of the rack 96 (rack tooth 96A), and can be cut, so that the rack 96 (rack tooth 96A) is moved downward.
- the behavior of the locking pin 42 due to the movement can be stabilized more effectively, and the locking pin 42 can be more effectively suppressed from inhibiting the downward movement of the piston 88 (rack 96).
- the locking pin 42 can be more easily crushed and deformed in the radial direction by the downward movement of the rack 96 (rack tooth 96A), and can be cut, so that the rack 96 (rack tooth 96A) is moved downward.
- the behavior of the locking pin 42 due to the movement can be stabilized more effectively, and the locking pin 42 can be more effectively suppressed from inhibiting the downward movement of the piston 88 (rack 96).
- a receiving portion 38B of the gear case 38 is provided between the locking pin 42 and the clutch plate 44, and the contact of the locking pin 42 with the receiving portion 38B broken to the clutch plate 44 is prevented (suppressed). .
- the behavior of the locking pin 42 due to the downward movement of the rack 96 (rack teeth 96A) can be effectively stabilized, and the locking pin 42 rotates the clutch plate 44 in the winding direction. Inhibiting can be effectively suppressed. Thereby, the rotation of the clutch plate 44 in the winding direction can be effectively stabilized, and the operation performance of the pretensioner mechanism 36 can be more effectively stabilized.
- the receiving portion 38B covers the entire thickness direction of the portion of the clutch plate 44 on the side of the locking pin 42 to further prevent (suppress) the contact of the broken locking pin 42 with the clutch plate 44. Therefore, the behavior of the locking pin 42 due to the downward movement of the rack 96 (rack teeth 96A) can be more effectively stabilized, and the locking pin 42 rotates in the winding direction of the clutch plate 44. Can be more effectively suppressed.
- the broken locking pin 42 is inserted into the upper side surface (recessed portion) of the receiving portion 38B to restrict the movement of the gear case 38 in the circumferential direction, thereby further preventing contact with the clutch plate 44 ( Suppressed). Therefore, the behavior of the locking pin 42 due to the downward movement of the rack 96 (rack teeth 96A) can be more effectively stabilized, and the locking pin 42 rotates in the winding direction of the clutch plate 44. Can be more effectively suppressed.
- a chamfered surface 42A is formed between the distal end surface and the peripheral surface of the locking pin 42 of the gear case 38. Therefore, when the locking pin 42 is inserted between the rack teeth 96A of the piston 88 (rack 96) and the piston 88 and the gear case 38 are assembled, the movement of the rack teeth 96A is guided to the chamfered surface 42A. The Accordingly, the locking pin 42 can be easily inserted between the rack teeth 96A, the piston 88 and the gear case 38 can be easily assembled, and the pretensioner mechanism 36 can be easily assembled.
- FIG. 11 is a perspective view showing a first modification of the locking pin 42 in the pretensioner mechanism 36.
- auxiliary hole 42B not only the auxiliary hole 42B but also a predetermined number (four in the present embodiment) of additional holes 42C having a rectangular cross section as the auxiliary portion are formed in the tip side portion of the locking pin 42.
- the additional hole 42 ⁇ / b> C is disposed in parallel to the axial direction (longitudinal direction) and the radial direction of the locking pin 42, extends (is elongated) in the axial direction of the locking pin 42, and the locking pin 42.
- the front end surface, the peripheral surface, and the chamfered surface 42A are opened.
- the additional hole 42C communicates with the auxiliary hole 42B, and the bottom surface of the additional hole 42C is flush with the bottom surface of the auxiliary hole 42B.
- the predetermined number of additional holes 42 ⁇ / b> C are arranged at equal intervals in the circumferential direction of the locking pin 42.
- the additional hole 42C is communicated with the auxiliary hole 42B, but the additional hole 42C may not be communicated with the auxiliary hole 42B.
- FIG. 12 is a perspective view showing a second modification of the locking pin 42 in the pretensioner mechanism 36.
- the auxiliary hole 42B at the tip end portion of the locking pin 42 has a rectangular cross section, and the auxiliary hole 42B is disposed along the axial direction (longitudinal direction) of the locking pin 42, It extends in the axial direction of the stop pin 42 (is elongated).
- the auxiliary hole 42B is opened from the front end surface, peripheral surface, and chamfered surface 42A of the locking pin 42, and the auxiliary hole 42B penetrates the locking pin 42 in the radial direction.
- one auxiliary hole 42B is formed in the locking pin 42, but a plurality of auxiliary holes 42B may be formed in the locking pin 42.
- the plurality of auxiliary holes 42 ⁇ / b> B may be arranged at equal intervals in the circumferential direction of the locking pin 42.
- FIG. 13 is a perspective view showing a third modification of the locking pin 42 in the pretensioner mechanism 36.
- an auxiliary hole 42B having a semi-elliptical cross section is formed in the peripheral portion of the distal end portion of the locking pin 42, and the auxiliary hole 42B is parallel to the axial direction (longitudinal direction) of the locking pin 42. It arrange
- the auxiliary hole 42B is opened from the tip surface, the peripheral surface, and the chamfered surface 42A of the locking pin 42, and the auxiliary hole 42B does not penetrate the locking pin 42 in the radial direction.
- one auxiliary hole 42B is formed in the locking pin 42, but a plurality of auxiliary holes 42B may be formed in the locking pin 42.
- the plurality of auxiliary holes 42 ⁇ / b> B may be arranged at equal intervals in the circumferential direction of the locking pin 42.
- the auxiliary hole 42B is made to reach the distal end surface of the locking pin 42 and is released from the distal end surface of the locking pin 42.
- the auxiliary hole 42B is not allowed to reach the distal end surface of the locking pin 42. It is not necessary to release from the front end surface of the locking pin 42.
- FIG. 14 is a perspective view showing a fourth modification of the locking pin 42 in the pretensioner mechanism 36.
- auxiliary holes 42B having a semicircular cross section are formed on the peripheral surface of the front end side portion of the locking pin 42. It is arrange
- a cylindrical auxiliary hole 42B similar to the above embodiment may be added to the locking pin 42 on the same axis.
- the auxiliary pin 42B and the additional hole 42C are formed as auxiliary portions in the locking pin 42. You may provide the low intensity
- the piston 88 (moving member) is moved to increase the restraining force of the occupant by the webbing 26.
- the configuration may be such that the restraining force of the occupant by the webbing 26 is increased by moving a moving body (moving member) such as a ball.
- the present invention may be applied to a mechanism that operates by movement of a moving member such as a selectable force limiter switching mechanism, a lap pretensioner mechanism, or a buckle pretensioner mechanism in a seat belt device.
- a moving member such as a selectable force limiter switching mechanism, a lap pretensioner mechanism, or a buckle pretensioner mechanism in a seat belt device.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automotive Seat Belt Assembly (AREA)
- Mechanical Operated Clutches (AREA)
Abstract
Description
36 プリテンショナ機構
38B 受部(抑制部)
42 係止ピン(係止部)
42A 面取り面
42B 補助孔(補助部)
42C 追加孔(補助部)
44 クラッチプレート(回転部材)
88 ピストン(移動部材)
Claims (10)
- 車両の乗員を拘束可能にされたウェビングと、
移動されることで前記ウェビングによる乗員の拘束力が増加される移動部材と、
柱状にされて前記移動部材の移動を係止すると共に、先端面と側面との間に面取り面が設けられ、破断されることで前記移動部材の移動を許容すると共に、補助部が設けられて前記移動部材の移動による径方向への潰れを補助される係止部と、
を備えたプリテンショナ機構。 - 前記補助部を前記係止部の先端側部分に設けた請求項1記載のプリテンショナ機構。
- 前記補助部を前記係止部の軸方向に延在させた請求項1又は請求項2記載のプリテンショナ機構。
- 前記補助部を前記係止部の径方向又は周方向に延在させた請求項1~請求項3の何れか1項記載のプリテンショナ機構。
- 前記係止部の前記補助部が設けられる軸方向位置を前記移動部材と前記移動部材の移動方向において対向させた請求項1~請求項4の何れか1項記載のプリテンショナ機構。
- 前記補助部を前記係止部の周面に配置した請求項1~請求項5の何れか1項記載のプリテンショナ機構。
- 前記移動部材の移動により前記係止部が切断される請求項1~請求項6の何れか1項記載のプリテンショナ機構。
- 前記係止部の前記補助部を設けない基端側部分を前記移動部材と前記移動部材の移動方向において対向させた請求項1~請求項7の何れか1項記載のプリテンショナ機構。
- 車両の乗員を拘束可能にされたウェビングと、
移動可能にされた移動部材と、
前記移動部材の移動を係止し、破断されることで前記移動部材の移動を許容する係止部と、
前記移動部材が移動されることで回転されて前記ウェビングによる乗員の拘束力が増加される回転部材と、
前記係止部と前記回転部材との間に設けられ、破断された前記係止部の前記回転部材への接触を抑制する抑制部と、
を備えたプリテンショナ機構。 - 破断された前記係止部の移動を前記抑制部が制限する請求項9記載のプリテンショナ機構。
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CN201380001671.3A CN103608218B (zh) | 2012-02-10 | 2013-02-06 | 预紧机构 |
US14/232,333 US9358952B2 (en) | 2012-02-10 | 2013-02-06 | Pretensioner mechanism |
KR1020147002323A KR101711509B1 (ko) | 2012-02-10 | 2013-02-06 | 프리텐셔너 기구 |
EP13747097.7A EP2813401B1 (en) | 2012-02-10 | 2013-02-06 | Pretensioner mechanism |
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JP2012-027504 | 2012-02-10 | ||
JP2012027504A JP5734889B2 (ja) | 2012-02-10 | 2012-02-10 | プリテンショナ機構 |
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EP (1) | EP2813401B1 (ja) |
JP (1) | JP5734889B2 (ja) |
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DE112013003334B4 (de) * | 2012-07-02 | 2022-10-27 | Ashimori Industry Co., Ltd. | Sicherheitsgurt-Aufroller |
DE102013009393B4 (de) * | 2013-06-05 | 2019-03-07 | Trw Automotive Gmbh | Gurtstraffer |
KR101569473B1 (ko) * | 2014-04-29 | 2015-11-27 | 주식회사 우신세이프티시스템 | 파단 결합형 랙기어를 포함하는 프리텐셔너 |
DE102014006499B4 (de) * | 2014-05-06 | 2019-01-10 | Trw Automotive Gmbh | Gurtstraffer und Verfahren zur Montage eines Gurtstraffers |
JP6894233B2 (ja) * | 2016-12-28 | 2021-06-30 | Joyson Safety Systems Japan株式会社 | プリテンショナ、リトラクタ、シートベルト装置及びプリテンショナの製造方法 |
US10369962B2 (en) * | 2017-05-15 | 2019-08-06 | Ford Global Technologies, Llc | Restraint system |
CN114655157B (zh) * | 2020-12-23 | 2024-04-12 | 延锋汽车智能安全系统有限责任公司 | 安全带卷收器和用于安全带卷收器的止动装置 |
JP2023090294A (ja) * | 2021-12-17 | 2023-06-29 | 株式会社東海理化電機製作所 | ウェビング巻取装置 |
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JP2013163443A (ja) | 2013-08-22 |
CN103608218A (zh) | 2014-02-26 |
US9358952B2 (en) | 2016-06-07 |
EP2813401B1 (en) | 2017-09-06 |
KR101711509B1 (ko) | 2017-03-02 |
KR20140124745A (ko) | 2014-10-27 |
CN103608218B (zh) | 2017-04-05 |
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