WO2014163073A1 - Système de rétraction de ceinture de sécurité - Google Patents

Système de rétraction de ceinture de sécurité Download PDF

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Publication number
WO2014163073A1
WO2014163073A1 PCT/JP2014/059627 JP2014059627W WO2014163073A1 WO 2014163073 A1 WO2014163073 A1 WO 2014163073A1 JP 2014059627 W JP2014059627 W JP 2014059627W WO 2014163073 A1 WO2014163073 A1 WO 2014163073A1
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WO
WIPO (PCT)
Prior art keywords
winding drum
rotation
webbing
seat belt
relay
Prior art date
Application number
PCT/JP2014/059627
Other languages
English (en)
Japanese (ja)
Inventor
伊藤　慶
Original Assignee
芦森工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 芦森工業株式会社 filed Critical 芦森工業株式会社
Publication of WO2014163073A1 publication Critical patent/WO2014163073A1/fr

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Classifications

    • 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
    • B60R22/341—Belt retractors, e.g. reels comprising energy-absorbing means
    • B60R22/3413—Belt retractors, e.g. reels comprising energy-absorbing means operating between belt reel and retractor frame
    • 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
    • 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
    • B60R22/28—Safety belts or body harnesses in vehicles incorporating energy-absorbing devices
    • B60R2022/286—Safety belts or body harnesses in vehicles incorporating energy-absorbing devices using deformation of material
    • B60R2022/287—Safety belts or body harnesses in vehicles incorporating energy-absorbing devices using deformation of material of torsion rods or tubes
    • 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
    • B60R2022/468—Reels with means to tension the belt in an emergency by forced winding up characterised by clutching means between actuator and belt reel

Definitions

  • the present invention relates to a seat belt retractor that restrains an occupant by webbing at the time of vehicle emergency, and more particularly to a technique for adjusting the generation start timing of a webbing extraction load for absorbing impact energy to the occupant by the webbing.
  • Patent Documents 1 to 3 Conventionally, as a seat belt retractor of this type, there are those disclosed in Patent Documents 1 to 3.
  • Patent document 1 has a bobbin on which a webbing is wound, a locking device which is prevented from rotating in a vehicle emergency, and a resistance member which engages with both the locking device and the bobbin. And a second energy absorbing mechanism for absorbing impact energy.
  • this seat belt device after the predetermined amount of rotation of the bobbin, energy is absorbed by the second energy absorbing mechanism, the idle state of at least one of the resistance member, the locking device, and the bobbin is idle in the standby state. It is provided.
  • the free running region in which the take-up drum can rotate relative to the locking base until the plastic deformation due to the torsional deformation of the torsion bar is started is the take-up drum and the locking base or the second energy absorbing member And the technology provided between them.
  • the idle running period is realized, for example, by inserting a spline portion provided in the locking base into a spline groove portion provided in the plate body, and providing an idle rotation region between the spline portion and the spline groove portion. ing.
  • an intermediate rotating member provided between the winding drum and the rotation restricting member, one end is attached to the intermediate rotating member and the other end is attached to one of the winding drum and the rotation restricting member.
  • the second impact absorbing member is provided on the other of the winding drum and the rotation regulating member, and when the intermediate rotating member is rotated by a predetermined amount with respect to the other of the winding drum and the rotation regulating member, the winding drum and the rotation regulating member.
  • Patent Document 1 to Patent Document 3 have a problem that the degree of freedom of the generation start timing of the webbing extraction load is low.
  • an object of this invention is to improve the freedom degree of generation
  • the seat belt retractor includes a take-up drum on which webbing is wound, a rotatable state coaxially with a rotation shaft of the take-up drum, and the webbing
  • a rotation restricting member which is switched in a state in which the rotation in the pull-out direction is restricted, and one end of the rotation restricting member is attached to one of the winding drum and the rotation restricting member in a non-rotatable manner
  • a relay member used as a torsion bar, provided between the other of the winding drum and the rotation restricting member and the other end side of the relay member, the other of the winding drum and the rotation restricting member and the relay member Permits relative rotation between the other of the winding drum and the rotation regulating member and the relay member in a state before relative rotation of the winding drum and the winding member.
  • a restraining mechanism for non-rotatably restrained and the other with the relay member of the winding drum and the rotation restricting member after the other rotation restricting member and said
  • a second aspect is the seat belt retractor according to the first aspect, wherein the restraining mechanism takes up the winding according to relative rotation between the other of the winding drum and the rotation regulating member and the relay member.
  • the winding includes the movable portion movable along the rotational axis direction of the drum and a restricting portion that restricts the movement of the movable portion by a predetermined amount or more, and the restricting portion restricts the movement of the movable portion.
  • a relative rotation exceeding a predetermined amount between the other of the take-off drum and the rotation restricting member and the relay member is restricted.
  • the seat belt retractor includes a take-up drum on which webbing is wound, a rotatable state coaxially with a rotation axis of the take-up drum, and rotation in a pulling direction to the webbing.
  • a rotation restricting member which is switched in a restricted state, a relay member as an impact absorbing member, one end of which is non-rotatably attached to one of the winding drum and the rotation restricting member, the winding drum and the winding drum
  • the rotational shaft direction of the winding drum is provided between the other of the rotation regulating member and the other end side of the relay member, and in accordance with relative rotation between the other of the winding drum and the rotation regulating member and the relay member.
  • the winding drum and the rotation by including a movable portion movable along the length and a regulating portion regulating movement of the movable portion by a predetermined amount or more, wherein the regulating portion regulates the movement of the movable portion.
  • Regulating member And a restraining mechanism for restraining relative rotation between the other and the relay member by more than a predetermined amount, and any part of the portion from the winding drum to the rotation restricting member via the relay member is
  • an impact absorbing mechanism is incorporated which generates a webbing pullout load by the relay member.
  • a fourth aspect is the seat belt retractor according to the second or third aspect, wherein the restraining mechanism includes a shaft member and a ring member configured to be externally fitted to the shaft member, One of the shaft member and the ring member is provided on the relay member so as not to be relatively rotatable, and either the shaft member or the ring member is relative to either the winding drum or the rotation restricting member.
  • the shaft member and the ring member is movable along the rotation shaft direction of the winding drum as the movable portion, and the shaft member and the ring member are By relatively rotating, the shaft member and the ring member are configured to be able to move relative to each other along the rotational axis direction of the winding drum, and the restriction portion is formed by the shaft member and the ring member.
  • pairs rotation exceeds a predetermined amount, it is provided so as to restrict the relative movement along the rotation axis direction of the winding drum and said ring member and said shaft member.
  • a fifth aspect is the seat belt retractor according to the fourth aspect, wherein the shaft member includes an externally threaded portion, and the ring member includes an internally threaded portion capable of screwing the externally threaded portion.
  • a sixth aspect is the seat belt retractor according to the fourth or fifth aspect, wherein either the shaft member or the ring member is integrally formed with the relay member.
  • a seventh aspect is the seat belt retractor according to any one of the fourth to sixth aspects, wherein any one of the shaft member and the ring member is formed separately from the relay member. Is attached to the relay member.
  • An eighth aspect is the seat belt retractor according to any one of the fourth to seventh aspects, wherein the shaft member and the ring member are rotated relative to each other by the shaft member and the ring member.
  • the shaft member and the ring member move relative to each other along the rotational axis direction of the winding drum while plastic deformation of at least one of them occurs.
  • a ninth aspect is the seat belt retractor according to any one of the first to eighth aspects, wherein in a standby state, the winding drum and the rotation restricting member are connected to be relatively non-rotatable, When a force in the pulling-out direction of the webbing due to an impact is applied to the winding drum, a shock absorbing member is further provided which allows relative rotation between the winding drum and the rotation regulating member while generating a webbing pull-out load.
  • a tenth aspect is the seat belt retractor according to the ninth aspect, wherein generation of the webbing extraction load by the relay member is set to start while the webbing extraction load is generated by the impact absorbing member. It is a thing.
  • An eleventh aspect is the seat belt retractor according to the ninth or tenth aspect, wherein the impact absorbing member is pulled out while being deformed by relative rotation between the winding drum and the rotation restricting member. Including wire.
  • the other of the winding drum and the rotation restricting member and the relay member are relatively rotated by a predetermined amount, the other of the winding drum and the rotation restricting member and the relay member are relatively rotated.
  • the relay member as a torsion bar is torsionally deformed as it is restrained immovably. For this reason, the start timing of the webbing extraction load generating operation by the relay member as the torsion bar can be delayed, and the freedom of the timing of the webbing extraction load generation operation can be improved.
  • the restricting portion when the restricting portion restricts the movement of the movable portion, relative rotation exceeding a predetermined amount between the other of the winding drum and the rotation restricting member and the relay member is restricted.
  • the webbing pullout load is generated by the shock absorbing mechanism.
  • the restraining mechanism includes a movable portion movable along the rotation axis direction of the winding drum according to relative rotation between the other of the winding drum and the rotation regulating member and the relay member, and the movable portion And a restricting portion for restricting the movement of the movable portion by a predetermined amount or more, and the restricting portion restricts the movement of the movable portion, whereby predetermined amounts of the other of the winding drum and the rotation restricting member and the relay member are It is configured to regulate the relative rotation beyond. Therefore, the webbing pullout load can be generated after relative rotation of the other of the winding drum and the rotation restricting member and the relay member one or more times, and the freedom of the timing of the webbing pullout load generation operation is improved. It can be done.
  • the restricting portion restricts the movement of the movable portion, the relative rotation exceeding the predetermined amount between the other of the winding drum and the rotation restricting member and the relay member is restricted.
  • the webbing pullout load is generated by the shock absorbing mechanism.
  • the restraining mechanism includes a movable portion movable along the rotation axis direction of the winding drum according to relative rotation between the other of the winding drum and the rotation regulating member and the relay member, and the movable portion And a restricting portion for restricting the movement of the movable portion by a predetermined amount or more, and the restricting portion restricts the movement of the movable portion, whereby predetermined amounts of the other of the winding drum and the rotation restricting member and the relay member are It is configured to regulate the relative rotation beyond. Therefore, the webbing pullout load can be generated after relative rotation of the other of the winding drum and the rotation restricting member and the relay member one or more times, and the freedom of the timing of the webbing pullout load generation operation is improved. It can be done.
  • the restricting portion restricts the relative movement of at least one of the shaft member and the ring member, thereby rotating the relative rotation of the shaft member and the ring member.
  • the webbing pullout load can be generated.
  • any one of the shaft member and the ring member and the relay member can be easily manufactured.
  • the relay member and any one of the shaft member and the ring member can be formed of materials suitable for the respective purposes.
  • one of the shaft member and the ring member is formed of a relatively hard material suitable for the function as the restraining mechanism, and the relay member is relatively suitable for the function of the torsion bar. It can be formed of a soft material.
  • the shock absorbing member can generate various webbing pullout loads.
  • the webbing extraction load by the relay member can be added to the webbing extraction load by the impact absorbing member to increase the webbing extraction load in stages.
  • the webbing extraction load can be generated by the deformation of the wire.
  • FIG. 1 is a perspective view showing the entire configuration of the seat belt retractor 10
  • FIG. 2 is a perspective view of the seat belt retractor 10 disassembled in functional units
  • FIGS. 3 and 4 further show the seat belt retractor 10. It is the perspective view disassembled finely.
  • FIG. 3 mainly shows the winding drum 30 and the parts assembled on one end side thereof
  • FIG. 4 mainly shows the parts assembled on the other end side of the winding drum 30.
  • the seat belt retractor 10 is applied to a seat belt device provided in a seat of a vehicle or the like.
  • the seat belt retractor 10 is incorporated in a lower portion of a center pillar of a vehicle or the like, and in a normal state, accommodates the webbing 12 as a seat belt so as to be able to be pulled out and taken up.
  • the seat belt retractor 10 restricts the withdrawal of the webbing 12 in order to effectively restrain the occupant when the vehicle is accelerating (including decelerating etc.) and in an abnormal state.
  • the seat belt retractor 10 winds up the webbing 12 so as to remove slack, and then the webbing 12 so as to mitigate an impact applied to the occupant. It is configured to be fed out gradually.
  • the seat belt retractor 10 includes a housing 20, a winding drum 30, a pretensioner mechanism 40, a winding mechanism 100, and a lock mechanism 60.
  • a pulling load generation mechanism is provided between the winding drum 30 and the lock mechanism 60.
  • the pullout load generation mechanism includes a wire type pullout load generation mechanism 80 and a torsion bar pullout load generation mechanism 90.
  • the winding drum 30 is accommodated in the housing 20, and the pretensioner mechanism 40 is incorporated in one end side (right side in FIG. 1) of the winding drum 30, and the other end side (left side in FIG. ) And the lock mechanism 60 are incorporated.
  • the winding mechanism 100 is configured to bias the winding drum 30 in the winding direction of the webbing 12.
  • the winding drum 30 In the normal state, the winding drum 30 is urged in the winding direction of the webbing 12 by the urging force of the winding mechanism 100, and the webbing 12 is pulled out against the urging force of the winding mechanism 100.
  • the lock mechanism 60 rotates the winding drum 30 in the pulling-out direction of the webbing 12 when the vehicle is in a non-normal state such as when the vehicle is decelerating (including an emergency such as a collision of the vehicle or a sudden decelerating). Configured to regulate.
  • the pretensioner mechanism 40 is configured to rotate the take-up drum 30 in the take-up direction of the webbing 12 at the time of a vehicle emergency or the like.
  • the pullout load generating mechanism causes the webbing 12 to be delivered. It allows rotation of the take-up drum 30 and generates a draw-out load that is a resistance when the webbing 12 is drawn out, thereby providing a role of absorbing and suppressing the impact of an occupant moving forward of the vehicle by sudden deceleration. Excuse me.
  • the housing 20 is a member formed of a metal plate or the like, and a plurality of connecting plate portions 23 connecting the pair of side plate portions 21 and 22 opposed to each other and the edge portions of the side plate portions 21 and 22. , And 24 are provided.
  • the side plate portions 21 and 22 are formed with openings 21 h and 22 h for exposing the end portion of the winding drum 30 to the outside.
  • the connecting plate portion 23 has a portion 23a extending to a position between the other edges (the upper edge in FIG. 1) of the side plate portions 21 and 22, and the webbing 12 is externally attached to this portion 23a.
  • An opening 23ah is formed for drawing out.
  • a resin-made guide member 23b having a slit-like opening through which the webbing 12 can be inserted is attached to the opening 23ah. Further, in the portion 23a of the connection plate portion 23, a screw fixing piece 23c in which a screw hole for attaching the seat belt retractor 10 to a vehicle body or the like is formed is formed.
  • the pretensioner mechanism 40 is attached to the outer surface of one side plate portion 21, and the lock mechanism 60 is attached to the outer surface of the other side plate portion 22. Is attached.
  • the winding drum 30 is a member rotatably disposed in the housing 20 in a state in which the webbing 12 is wound.
  • the winding drum 30 is made of aluminum or the like, and radially protrudes at both ends of the cylindrical winding drum main body 31 and the axial direction of the winding drum main body 31.
  • the flanges 32, 34 are formed on the The webbing 12 is wound around the winding drum main body 31 between the flanges 32 and 34.
  • an axial hole 36 is formed in the winding drum 30 along the central axis thereof.
  • the axial hole portion 36 is not penetrating at one end side of the winding drum 30 and is open at the other end side of the winding drum 30.
  • the torsion bar 38 is inserted into the shaft hole portion 36.
  • One end 38a of the torsion bar 38 protrudes outward from the flange 34 at the other end of the winding drum 30, and is coupled to a ratchet gear 61 (described later) of the lock mechanism 60 so as to be relatively non-rotatable.
  • the other end 38 b of the torsion bar 38 is connected to the winding drum 30 via a restraining mechanism 92 which will be described in detail later inside the shaft hole 36.
  • FIG. 5 is a perspective view showing the pretensioner mechanism 40 disassembled from the seat belt retractor 10
  • FIG. 6 is an explanatory view showing the internal structure of the pretensioner mechanism 40.
  • the pretensioner mechanism 40 rotates the take-up drum 30 in the take-up direction of the webbing 12 in an emergency such as a collision of a vehicle.
  • Is a mechanism for removing As described above, in an emergency such as a collision of a vehicle, by removing the slack of the webbing 12, the occupant can be firmly restrained to the seat.
  • the pretensioner mechanism 40 includes a gas generating member 41, a pipe cylinder 42, a piston 43, a pinion gear 45, and a clutch mechanism 50.
  • the gas generating member 41 has a gas generating agent such as a pyrotechnic charge, and is configured to generate a gas by igniting the gas generating agent according to the output of an impact detection sensor or the like.
  • a gas generating agent such as a pyrotechnic charge
  • the pipe cylinder 42 is formed as an L-shaped cylindrical member in which a gas introduction portion 42 b is provided in a row at one end of a linear piston guide cylindrical portion 42 a.
  • the gas generating member 41 is attached to the gas introducing portion 42b. Therefore, the gas generated by the gas generating member 41 is introduced into the piston guide cylindrical portion 42a from the gas introducing portion 42b side (lower side in FIG. 6 and the like) of the pipe cylinder 42.
  • an opening 42ah is formed at a longitudinally middle portion of one side of the piston guide cylinder 42a. A portion of pinion gear teeth 45a of a pinion gear 45 described later is disposed in the opening 42ah.
  • the pipe cylinder 42 is held by the base plate 48a on the side plate portion 21 side and the cover plate 48b on the outer side, and is held between the base block 49 and the cover plate 48b. It is attached and fixed to the outer surface of the side plate part 21 using it.
  • a through-hole can be attached to the upper end portion of the piston guide cylindrical portion 42a, through which the pretensioner mechanism 40 can be attached to the housing 20, and the stopper pin PIN2 functioning as disengaging the piston 43 and disengaging and stopping the pipe cylinder 42 can be inserted.
  • 42c is formed.
  • the piston 43 is a member formed of steel or the like, and has an elongated shape as a whole. At one side portion of the piston 43, rack teeth 43a that mesh with pinion gear teeth 45a of the pinion gear 45 are formed. Further, one end surface (lower end surface in FIG. 6 and the like) of the piston 43 is formed in a circular end surface according to the cross-sectional shape of the piston guide cylindrical portion 42a. A seal plate 42s formed of an elastomer such as rubber is attached to the circular end face.
  • the piston 43 is inserted and disposed on the back side of the piston guide cylindrical portion 42a until the rack teeth 43a are not meshed with the pinion gear teeth 45a in the standby state before the operation of the pretensioner mechanism 40.
  • the pinion gear 45 is a cylindrical member formed of steel or the like, and on the outer peripheral portion thereof, pinion gear teeth 45a capable of meshing with the rack teeth 43a are formed. Further, a cylindrical support portion 45 b is formed so as to extend outward from the pinion gear teeth 45 a.
  • the support portion 45 b is rotatably fitted in a support hole 48 h formed in a cover plate 48 b attached to the outer surface side of the side plate portion 21.
  • a part of the pinion gear teeth 45a is disposed in the opening 42ah of the piston guide cylinder 42a through the opening 42ah. Then, when the piston 43 moves upward from the standby state, the rack teeth 43a mesh with the pinion gear teeth 45a, and the pinion gear 45 rotates.
  • the rotation of the pinion gear 45 is transmitted to the take-up drum 30 via the clutch mechanism 50 (see FIG. 3).
  • a boss 45d is formed which protrudes in the axial direction.
  • the boss 45d is formed in a non-circular cross section (here, a spline having a plurality of ridges).
  • the boss 45d is disposed so as to protrude toward the winding drum through an opening formed in the base plate 48a.
  • the clutch mechanism 50 is in a state in which the take-up drum 30 is freely rotated relative to the pinion gear 45 in a normal state (a state in which the rotation transmission path between the two is disconnected), and in the operation of the pretensioner mechanism 40. Is configured to be switchable in a state of transmitting the winding drum 30 to the winding drum 30 (a state of establishing a rotation transmission path between the two).
  • the clutch mechanism 50 includes a pawl base 51 formed of steel or the like, a plurality of (here, three) clutch pawls 52 formed of steel or the like, and a pawl guide 53 formed of resin or the like. Have.
  • a fitting hole 51h into which the boss 45d is fitted is formed at the central portion of the pawl base 51, and the pawl base 51 is engaged with the pinion gear 45 by the boss 45d being fitted into the regular fitting hole 51h. It is mounted non-rotatably. That is, the pinion gear 45 and the pawl base 51 are in an integrally rotating relationship. Also, with the boss 45 d fitted in the fitting hole 51 h as described above, the bearing 54 is fitted in the boss 45 d. The shaft portion 32 b formed in the center of the other side surface of the winding drum 30 is inserted into the bearing 54.
  • Each clutch pawl 52 is supported by the pawl base 51 so as to be changeable between an accommodation posture and a locking posture.
  • the housing posture is a posture in which the entire clutch pawl 52 is housed in the outer peripheral edge of the pawl base 51
  • the locking posture is a posture in which the tip end of the clutch pawl 52 protrudes outward of the outer peripheral edge of the pawl base 51 is there.
  • the pawl guide 53 is an annular member, and is disposed at a position facing the pawl base 51 across the respective clutch pawls 52.
  • Positioning projections (not shown) are provided protruding on the outer side surface of the pawl guide 53.
  • the positioning projections are fitted into the positioning holes 48e of the base plate 48a, so that the pawl guide 53 is in a standby state. Is fixed to the base plate 48a in a non-rotatable state.
  • an attitude changing projection 53 a is provided to correspond to each clutch pawl 52.
  • each clutch pawl 52 abuts on the posture changing projection 53a, and the posture is changed from the accommodation posture to the locking posture. It has become.
  • each clutch pawl 52 when each clutch pawl 52 changes its attitude to the locking attitude, it engages with the winding drum 30. More specifically, an annular recess 32 h in which the clutch mechanism 50 can be disposed is formed on one side surface of the winding drum 30 (see FIG. 5). A clutch gear 32a is formed on the peripheral wall of the annular recess 32h, and the tip end of the clutch pawl 52 is engageable with the clutch gear 32a. Then, when the clutch pawl 52 changes its attitude to the locking position as described above, the tip end of the clutch pawl 52 engages with the clutch gear 32a, whereby the pawl base 51 rotates the winding drum 30. .
  • the engagement between the clutch pawl 52 and the clutch gear 32a is an engagement structure in only one direction for rotating the take-up drum 30 in the take-up direction of the webbing 12.
  • the pawl base 51 rotates with the pinion gear 45.
  • the posture changing projection 53a formed on the pawl guide 53 abuts on the clutch pawl 52, and the clutch pawl 52 is engaged.
  • the clutch pawl 52 engages with the clutch gear 32 a of the winding drum 30.
  • the force of the piston 43 to move upward is transmitted to the winding drum 30 via the pinion gear 45, the pawl base 51, the clutch pawl 52 and the clutch gear 32a, and the winding drum 30 takes up the webbing 12
  • the webbing 12 is wound around the winding drum 30 as it is rotationally driven in the direction.
  • the piston can move in the opposite direction. Therefore, when the webbing 12 is pulled in the pulling-out direction by the movement of the occupant due to the impact and the winding drum 30 is rotated in the pulling-out direction of the webbing 12, the pinion gear 45 is in the opposite direction to that when the pretensioner mechanism 40 operates.
  • the piston 43 is pushed back in the direction opposite to the operating direction through the clutch mechanism 50. Then, when the piston 43 is pushed back to a position where the mesh teeth 43 a of the piston 43 and the pinion gear teeth 45 a of the pinion gear 45 disengage, the pinion gear 45 is disengaged from the piston 43. You will be able to rotate freely. As described above, after actuation of the pretensioner mechanism 40, the rotation of the webbing 12 in the pullout direction is not suppressed as much as possible.
  • the configuration of the pretensioner mechanism is not limited to the above configuration. Depending on the gas pressure generated by the gas generating agent, the wire or the like may be pulled to rotate the winding drum, or the winding drum may be rotated by driving the motor or the like. In short, the pretensioner mechanism may have any configuration as long as the winding drum can be rotated at the timing when an emergency state such as a vehicle collision is detected.
  • the lock mechanism 60 allows rotation of the one end 38a of the torsion bar 38 in the normal state as shown mainly in FIGS. 2 to 4 and 7 to 9, and in the non-normal state in the direction in which the webbing 12 is pulled out. The rotation of one end 38 a of the torsion bar 38 is restricted.
  • the lock mechanism 60 is configured to restrict the rotation of the one end 38a of the torsion bar 38 at the time of the sudden withdrawal of the webbing 12 and the rapid acceleration or deceleration of the vehicle.
  • the lock mechanism 60 includes the ratchet gear 61, the lock pawl 64, the lock clutch 66, the lock cover 68, the webbing sensitive portion 70, and the acceleration sensitive portion 74 (see FIGS. 3 and 4). ). Then, according to the sensing operation of the webbing sensing unit 70 or the acceleration sensing unit 74, the lock side clutch 66 moves the lock pawl 64 to engage with the ratchet gear 61, thereby restricting the rotation of the ratchet gear 61 and the winding drum 30. Do.
  • a ratchet gear 61 is attached to one end 38 a of the torsion bar 38.
  • the ratchet gear 61 is disposed adjacent to the other side surface of the take-up drum 30, and rotates in conjunction with the take-up drum 30 in a normal state, and is stopped by the lock mechanism 60 in a vehicle emergency or the like. Be done. That is, the ratchet gear 61 can be switched between the state in which it can be rotated coaxially with the rotation axis of the winding drum 30 and the state in which the rotation of the webbing 12 in the pulling direction is restricted. It is a rotation restricting member.
  • the ratchet gear 61 is a member formed of steel or the like, and has a disc-like ratchet gear main body 61a, and a shaft 61c protruding from one main surface side of the ratchet gear main body 61a. Is equipped. On the outer peripheral portion of the ratchet gear main body portion 61a, there are formed ratchet gear teeth 61b which can be engaged with the lock pawl 64.
  • the ratchet gear main body 61a is (slightly) smaller than the opening 22h formed in the side plate portion 22, and is rotatably disposed in the opening 22h.
  • the shaft 61 c is fitted into a lock rotation member 71 described later.
  • a fitting hole 62a into which one end 38a of the torsion bar 38 can be fitted is formed in the center of the other main surface of the ratchet gear main body 61a (see FIG. 10).
  • a cylindrical portion 62 is provided in the center of the other main surface of the ratchet gear main portion 61a so that the inner peripheral portion of the cylindrical portion 62 corresponds to the one end 38a of the torsion bar 38 Are formed in the fitting hole 62a formed in the gear shape) (see FIG. 10).
  • the one end 38a of the torsion bar 38 is fitted into the fitting hole 62a, whereby the one end 38a of the torsion bar 38 and the ratchet gear 61 are attached to each other such that relative rotation is not possible.
  • FIGS. 2, 4, 7 and 8 are explanatory views showing the operation of the lock pawl 64.
  • the lock pawl 64 is a member formed of steel or the like.
  • the lock pawl 64 is formed in an elongated member (here, an elongated member), and an engagement tooth 64a engageable with the ratchet gear tooth 61b is formed on one end side thereof.
  • the lock pawl 64 is attached at an outer peripheral position of the winding drum 30 attached to the housing 20 with respect to the side plate portion 22 so as to be changeable in attitude between the engagement attitude and the non-engagement attitude via the pin member 64c. .
  • the engagement posture is a position where the engagement teeth 64a are engaged with the ratchet gear teeth 61b
  • the non-engagement posture is a position where the engagement teeth 64a are separated from the ratchet gear teeth 61b.
  • a connecting pin 64b is provided in a projecting manner on one surface of the lock pawl 64, and the connecting pin 64b passes through a recess 22ha formed by cutting out a part of the peripheral portion of the opening 22h. It protrudes to the outer surface side of the side plate portion 22.
  • a return spring (not shown) is attached to the lock pawl 64 as a biasing member for biasing the lock pawl 64 to the non-engagement position.
  • One end of the return spring is fixed to the housing 20 or the like, and the other end of the return spring is fixed to one end of the lock pawl 64, and the biasing force of the return spring urges the lock pawl 64 to the non-engagement position. ing.
  • the lock pawl 64 is maintained in the non-engagement posture by the biasing force of the return spring (see FIG. 7).
  • the lock pawl 64 is changed to the engagement attitude by the lock side clutch 66 described later, the engagement teeth 64a of the lock pawl 64 engage with the ratchet gear teeth 61b of the ratchet gear 61, and the ratchet gear 61
  • the rotation of the winding drum 30 is regulated (see FIG. 8).
  • the attitude of the lock pawl 64 is changed to the non-engagement attitude by the biasing force of the return spring, and the ratchet gear 61 and the winding drum 30 are webbing 12. Can be pulled out and taken up.
  • the lock side clutch 66 and the lock cover 68 are members formed of resin or the like.
  • the lock cover 68 has a clutch accommodating portion 68a and an acceleration sensitive portion accommodating portion 68b.
  • the clutch housing portion 68a is formed in a case shape capable of rotatably housing the lock side clutch 66 within a predetermined range, and having a housing space opened to the side plate portion 22 side.
  • the acceleration sensitive portion accommodating portion 68b is formed in a case shape capable of accommodating the acceleration sensitive portion 74 and having a space communicating with the space in the clutch accommodating portion 68a.
  • the clutch cover 68a is disposed at a position corresponding to the outer surface of the flange 34 on the other side of the take-up drum 30, and the lock cover 68 is disposed below the acceleration sensor housing 68b. It is attached to the outer surface of the side plate portion 22.
  • the lock cover 68 may be attached by fitting a projection formed on the lock cover 68 into the side plate portion 22 or by pinning or screwing.
  • the lock-side clutch 66 includes a disk-shaped plate portion 66p, an inner peripheral wall portion 66a (see FIG. 9) and an outer peripheral wall portion 67 (see FIG. 4) formed on one main surface of the plate portion 66p. .
  • an insertion hole 66ah through which a shaft projection 71p described later can be inserted is formed, and the lock clutch 66 is fixed (here, small in the clutch housing portion 68a of the lock cover 68). It is rotatably accommodated within a fixed rotation range.
  • the inner peripheral wall portion 66a is formed at a position surrounding the insertion hole 66ah, and an inner tooth 66b is formed on the inner peripheral surface of the inner peripheral wall portion 66a to which a distal end engaging portion 73a of an inertia arm 73 described later can be engaged. (See Figure 9).
  • the outer peripheral wall portion 67 is formed so as to surround the inner peripheral wall portion 66a with an interval. In a part of the outer peripheral wall portion 67, a connection hole 67h into which the connection pin 64b of the lock pawl 64 can be fitted is formed.
  • the lock pawl 64 rotates in the forward and reverse directions in the fixed rotation range, thereby changing the attitude of the lock pawl 64 between the engagement attitude and the non-engagement attitude.
  • the lock side clutch 66 is set to the rotation posture corresponding to the non-engagement posture of the lock pawl 64 by the bias force. It is energized.
  • a lock arm support shaft portion 67b is provided on another part of the outer peripheral wall portion 67 to support a lock arm 78, which will be described later, so as to be changeable (see FIG. 4).
  • the lock arm 78 is an elongated member having an engagement portion 78a that can be engaged with the external teeth 71b of the lock rotation member 71 (see FIG. 4).
  • the base end portion of the lock arm 78 is pivotally supported by the lock arm support shaft portion 67b so as to be changeable between an engaged attitude and a non-engaged attitude.
  • the engagement posture of the lock arm 78 is a posture in which the engagement portion 78a is moved to the inner peripheral side to be engaged with the external teeth 71b of the lock rotation member 71 (see the position shown in FIG. 9).
  • the combined posture is a posture in which the engaging portion 78a is moved to the outer peripheral side and retracted from the external teeth 71b.
  • FIG. 9 is an explanatory view schematically showing the webbing sensitive unit 70.
  • the webbing sensitive portion 70 is a portion for regulating the rotation of the winding drum 30 when the webbing 12 is rapidly pulled out, and includes a lock rotation member 71 and a coil spring as a biasing member. 72 and an inertial arm 73.
  • the lock rotation member 71 is a member formed of a resin or the like, and is formed in a circular member in which a peripheral wall portion 71a is formed on one main surface of a disk portion.
  • the peripheral wall 71a is set to a diameter that can be disposed between the inner peripheral wall 66a and the outer peripheral wall 67, and the peripheral wall 71a is disposed between the inner peripheral wall 66a and the outer peripheral wall 67. In the installed state, it is made rotatable.
  • An outer tooth 71 b capable of engaging the engaging portion 78 a of the lock arm 78 is formed on the outer peripheral portion of the peripheral wall portion 71 a.
  • a fitting hole (not shown) into which the shaft portion 61c of the ratchet gear 61 can be fitted is formed. Then, the shaft portion 61c is fitted into the fitting hole. Further, a shaft projection 71p is provided in the center of the lock rotation member 71 opposite to the opening of the fitting hole. The fitting hole is formed to such a depth as to reach the inside of the shaft projection 71p. Therefore, as described later, the shaft portion 61c inserted into the fitting hole plays a role of reinforcing the shaft projection 71p. .
  • the inertia arm 73 is a member formed of resin or the like, and is formed in an arc shape along the inside of the outer peripheral edge portion of the lock rotation member 71. One end portion of the inertia arm 73 is formed at a tip end engaging portion 73a that can be engaged with the inner teeth 66b of the inner peripheral wall portion 66a.
  • the inertia arm 73 is rotatably supported via the support shaft portion 71c at a position deviated from the center of the lock rotation member 71, and the non-engagement portion 73a is moved to a position from the inner circumference.
  • the attitude can be changed between the stop attitude (see the solid line in FIG. 9) and the engagement attitude (see the dotted line in FIG.
  • a coil spring 72 as an urging member for urging the inertia arm 73 to the non-engagement posture is interposed in a compressed state between the other end of the inertia arm 73 and the stop piece 71f of the lock rotation member 71. .
  • the inertial arm 73 is biased toward the retracted position by the biasing force of the coil spring 72.
  • the acceleration sensing unit 74 is a portion for restricting the rotation of the winding drum 30 at the time of rapid acceleration of the vehicle, and includes a sphere 75, a relay transmission lever 76 and a lock arm 78. ing. It should be noted that the rapid acceleration of the vehicle includes the case where the acceleration is "minus", that is, includes the time of deceleration, and of course includes the case of rapid deceleration due to a collision of the vehicle.
  • the sphere 75 is a metal sphere or the like, and is supported by the sphere support portion 75b in a mounting manner.
  • the sphere support portion 75 b has a portion that supports only a portion smaller than the lower half of the sphere 75. Therefore, when a large inertial force acts on the sphere 75, the sphere 75 is displaced upward in an attempt to get out of the sphere support portion 75b.
  • the relay transmission lever 76 has a disc-like portion 76a that covers the upper portion of the sphere 75, and is supported above the sphere 75 so as to be changeable in position by a support column 75c that protrudes from the sphere support portion 75b. There is. Then, when the sphere 75 is contained in the sphere support portion 75 b, the relay transmission lever 76 is placed on the top of the sphere 75. From this state, when the sphere 75 is displaced upward in order to disengage from the sphere support 75b, the relay transmission lever 76 is also lifted upward.
  • the spheres 75, the sphere support portion 75b and the relay transmission lever 76 are accommodated in the acceleration sensitive portion accommodation portion 68b of the lock cover 68. Further, in this state, the side plate portion 22 side opening of the acceleration sensitive portion accommodation portion 68 b is closed by the lid portion 77.
  • the relay transmission lever 76 is disposed at a position where it can be in contact with the lock arm 78 through the upper portion between the acceleration sensitive portion housing portion 68 b and the lid portion 77. Then, when the relay transmission lever 76 is lifted upward, the engaging portion 78a of the lock arm 78 is lifted by the relay transmission lever 76, and the lock arm 78 is changed into the engagement posture. Since the rotation range of the lock clutch 66 is slight here, it is possible to maintain the state in which the relay transmission lever 76 lifts the lock arm 78 in the rotation range.
  • the ball 75 In the normal state, the ball 75 is accommodated at a predetermined position of the ball support 75b, and the lock arm 78 is also maintained in the non-engagement posture by its own weight. In this state, when the vehicle is rapidly accelerated (decelerated), the ball 75 deviates from the predetermined position of the ball support 75b and is displaced upward. Then, the relay transmission lever 76 is lifted upward, and the lock arm 78 is also changed to the engagement position. Then, the engaging portion 78 a of the lock arm 78 engages with the external teeth 71 b of the peripheral wall portion 71 a of the lock rotating member 71.
  • the rotational force of the lock rotation member 71 is transmitted to the lock side clutch 66 via the lock arm 78, and the lock side clutch 66 is rotated.
  • the lock side clutch 66 is rotated until the lock pawl 64 engages with the ratchet gear teeth 61b, the state in which the relay transmission lever 76 lifts the lock arm 78 may be maintained or released. Good.
  • the inertia arm 73 changes its posture to the engagement posture by the inertia force, and the tip engagement portion 73a engages with the internal teeth 66b to rotate the lock clutch 66. .
  • the lock pawl 64 is changed to the engagement attitude, and the engagement teeth 64 a of the lock pawl 64 engage with the ratchet gear teeth 61 b of the ratchet gear 61 to restrict the rotation of the ratchet gear 61 and the winding drum 30. .
  • the rotation of the one end portion 38 a of the torsion bar 38 is restricted, and the drawing of the webbing 12 is restricted.
  • the torsion bar 38 is used as an impact absorbing member that couples the winding drum 30 and the ratchet gear 61 as a rotation restricting member in a relatively non-rotatable manner under a load in the pull-out direction of the webbing 12 smaller than the predetermined load.
  • the predetermined load means a load range generated by the normal use condition of the seat belt retractor 10 (that is, a load generated by pulling the webbing 12 manually by hand and drawing the webbing 12 by deceleration assumed for normal traveling. ) And the load range produced by an emergency situation such as a collision of the vehicle.
  • the ball 75 deviates from the predetermined position of the ball support 75b and is displaced upward. Then, the relay transmission lever 76 is lifted upward, and the relay transmission lever 76 changes the attitude of the lock arm 78 to the engaged position. Thereby, the engaging portion 78a of the lock arm 78 engages with the external teeth 71b of the peripheral wall 71a of the lock rotation member 71, and the rotational force of the lock rotation member 71 is transmitted to the lock side clutch 66 via the lock arm 78. The lock clutch 66 rotates.
  • the lock pawl 64 is changed to the engagement attitude, and the engagement teeth 64 a of the lock pawl 64 engage with the ratchet gear teeth 61 b of the ratchet gear 61, and the ratchet gear 61 and the winding drum 30. Regulate the rotation of Thereby, the rotation of the one end portion 38 a of the torsion bar 38 is restricted, and the drawing of the webbing 12 is restricted.
  • the rotation of the ratchet gear 61 can be restricted at least in an emergency state, and the operation of the pullout load generation mechanism described below can be started.
  • the lock mechanism 60 restricts (stops) the rotation of the one end 38a of the torsion bar 38 when the webbing 12 is suddenly pulled out and the vehicle is rapidly accelerated, one of these methods is used.
  • the rotation of one end 38a of the torsion bar 38 may be restricted by another mechanism. That is, the lock mechanism 60 may be configured to restrict the rotation of the one end portion 38 a of the torsion bar 38 at least in the emergency state where shock absorption should be performed while pulling out the webbing 12.
  • the winding mechanism 100 is configured to always bias the winding drum 30 in the winding direction.
  • the winding mechanism 100 is provided outside the lock mechanism 60, and includes a spiral spring 102, a stopper 104, and a spring cover 106.
  • the stopper 104 is fixed to the tip end of the shaft projection 71 p projecting to the outside of the lock mechanism 60 in a detent state, and is fixed to the innermost peripheral end of the spiral spring 102.
  • the spiral spring 102 is housed inside a spring cover 106 attached to the outer surface of the lock mechanism 60 in a state of being disposed outside the lock mechanism 60. Within the spring cover 106, the outer end of the spiral spring 102 is fixed in a fixed position within the spring cover 106.
  • the rotational biasing force in one direction of the spiral spring 102 always biases the winding drum 30 in the winding direction with respect to the winding drum 30 via the lock rotation member 71, the ratchet gear 61 and the torsion bar 38. It acts as a force.
  • FIG. 10 and 11 are exploded perspective views showing the pullout load generating mechanism portion in the seat belt retractor 10 and 11 are exploded perspective views showing the pullout load generating mechanism portion in the seat belt retractor 10, and FIG. 12 is a partial sectional view along the axial direction of the pullout load generation mechanism portion.
  • the seat belt retractor 10 includes a pullout load generating mechanism that generates a pullout load that acts as a resistance to the webbing 12 when the webbing 12 is pulled out after the lock mechanism 60 starts operating.
  • the pullout load generation mechanism can also be regarded as a mechanism that absorbs an impact applied to the occupant from the webbing 12 by the pullout load.
  • the pullout load generation mechanism includes a wire type pullout load generation mechanism 80 and a torsion bar pullout load generation mechanism 90.
  • the wire-type pullout load generation mechanism 80 is a mechanism that generates a pullout load of the webbing 12 by the pullout resistance of the wire 86.
  • the torsion bar type extraction load generation mechanism 90 is a mechanism that generates the extraction load of the webbing 12 by the torsional deformation of the torsion bar 38.
  • the wire-type pullout load generating mechanism 80 makes the take-up drum 30 and the ratchet gear 61 as a rotation restricting member relatively unrotatable. It is connected, and an impact which allows relative rotation between the winding drum 30 and the ratchet gear 61 while generating a drawing load on the webbing 12 when a force in the pulling-out direction of the webbing 12 is applied to the winding drum 30 by an impact.
  • the wire 86 is an impact absorbing member.
  • the wire-type pullout load generating mechanism 80 is configured to generate a pullout load of the webbing 12 by deforming and pulling out the wire 86 by relative rotation between the winding drum 30 and the ratchet gear 61.
  • a cylindrical portion 37 is provided so as to surround the opening of the shaft hole portion 36.
  • the cylindrical portion 62 of the ratchet gear 61 is non-rotatably coupled to the one end 38 a of the torsion bar 38 in a state where the cylindrical portion 62 is inserted into the main cylinder 37 so as to be relatively rotatable.
  • a recess 37a is formed in a part of the cylindrical portion 37 in the circumferential direction, and one end of the wire 86 is bent and fitted into the recess 37a from the outer peripheral side of the cylinder 37, thereby one end of the wire 86
  • the unit is mounted non-rotatably relative to the winding drum 30.
  • a disc-like portion 63 is formed on the outer peripheral portion of the surface of the ratchet gear 61 on the side facing the winding drum 30.
  • An outer peripheral wall portion 63 w is formed on an outer peripheral portion of the disk-shaped portion 63 on the surface on the winding drum 30 side so as to surround the cylindrical portion 62 at an interval.
  • a lead-out passage 63p is formed to allow the wire 86 to be drawn while applying resistance.
  • the lead-out passage 63p is formed on the inner peripheral side of the outer peripheral wall 63w by a gap between a plurality of projecting portions 63a, 63b, 63c, 63d, 63e protruding along the outer peripheral wall 63w. (See Figure 13). More specifically, the protruding portions 63a, 63c and 63e are formed on the inner peripheral side of the outer peripheral wall 63w at intervals along the circumferential direction.
  • a curved surface which is convex toward the outer peripheral side of the disc-like portion 63 is formed on the projecting portions 63 a, 63 c, 63 e. Further, at a position where the protruding portions 63b and 63d are on the inner peripheral side of the outer peripheral wall 63w and on the outer peripheral side of the protruding portions 63a, 63c and 63e, between the 63a, 63c and 63e along the circumferential direction of the outer peripheral wall 63w. It is provided to be located in Curved surfaces that are convex toward the inner peripheral side of the disc-like portion 63 are formed in the projecting portions 63 b and 63 d.
  • the outer peripheral side of the disc-like portion 63 becomes convex at two places (two places in contact with the protruding parts 63a, 63c), At one location (location contacting the projecting portion 63b), a lead-out path 63p that is convex toward the inner circumferential side is formed. Then, when the wire 86 passes through the main lead-out path 63p, it is bent and deformed at each portion which becomes convex in the lead-out path 63p, whereby the lead-out resistance is given to the wire 86 .
  • a gap in which the wire 86 can be disposed is formed between the projecting portions 63 b and 63 d and the outer peripheral wall 63 w. Furthermore, on the surface of the disc-like portion 63 on the winding drum 30 side and on the inner peripheral side of the outer peripheral wall 63 w, a plurality of guiding protrusions 63 f are provided to guide the wire 86 along an arc-shaped path. Is formed. Then, the wire 86 is guided so as to pass through the lead-out path 63p and to pass through the inner peripheral side of the outer peripheral wall 63w.
  • the shape of the lead-out path 63p is not limited to the above example, and any shape may be used as long as it can be drawn while giving resistance to the wire 86 by providing a bent portion or providing a narrow portion.
  • one end of the wire 86 is attached to the cylindrical portion 37 of the take-up drum 30 so as not to be relatively rotatable, and the longitudinal middle portion of the wire 86 and the other end side portion
  • the ratchet gear 61 is incorporated in a state where it can pass 63p.
  • the wire 86 passes through the lead-out passage 63p to give a lead-out resistance, thereby generating a lead-out load of the webbing 12 .
  • the wire 86 is a linear member formed of steel or the like, and one end thereof is bent and fitted and fixed to the cylindrical portion 37 of the winding drum 30. Further, the middle portion in the longitudinal direction of the wire 86 is disposed in the lead-out passage 63p in a state of being bent so as to be disposed along the lead-out passage 63p. A portion of the wire 86 between the one end portion and the longitudinal middle portion is bent in an annular shape, and is wound around the outer periphery of the cylindrical portion 37 about once.
  • the other end side portion of the wire 86 is curved in a spiral shape with respect to the longitudinal middle portion, and an arc-shaped path formed between the plurality of guide protrusions 63f, the outer peripheral wall 63w and the projecting portion 63b, 63d or through an arc-shaped path formed between the guide projections 63f, along the inner peripheral side of the outer peripheral wall 63w, so as to draw a circle of one or more times (here about one and a half times) , Will be arranged.
  • the tubular portion 37 of the take-up drum 30 is fitted into the tubular portion 62 of the ratchet gear 61, and by combining the take-up drum 30 and the ratchet gear 61, one end of the wire 86 rotates relative to the take-up drum 30.
  • the wire 86 is disposed between the one side surface of the winding drum 30 and the disc-like portion 63 of the ratchet gear 61 in a state in which the longitudinally middle portion is disposed in the lead-out path 63p Be done.
  • the intermediate member which can rotate within a fixed range may be attached to the winding drum side, and the end part of a wire may be attached to the said intermediate member.
  • the wire drawing start timing can be delayed.
  • a path may be formed on the winding drum side to apply a drawing resistance to the wire, and the wire may be connected to the ratchet gear side so as not to be relatively rotatable.
  • the intermediate member may be attached to the ratchet gear side.
  • one end of the wire 86 is non-rotatably attached to the winding drum 30, and the longitudinal middle portion and the other end of the wire 86 It is arranged in a spiral around.
  • the longitudinal middle portion of the wire 86 is disposed in a curved state so as to be corrugated along the lead-out path 63p.
  • the winding drum 30 When rapid acceleration (deceleration) occurs due to a collision or the like of the vehicle, the winding drum 30 is rotated in the winding direction of the webbing 12 by the pretensioner mechanism 40, and a ratchet in the pulling direction of the webbing 12 by the lock mechanism 60. The rotation of the gear 61 is restricted.
  • the cross-sectional shape of the wire 86 (the cross-sectional shape in a plane perpendicular to the longitudinal direction) is flat so that the wires 86 are in surface contact when wound so as to be easily wound multiple times around the cylindrical portion 37 It is preferable that it is a shape.
  • a thin strip may be used as the wire 86.
  • the generation period of the extraction load of the webbing 12 due to the extraction resistance of the wire 86 depends on the length of the wire 86. That is, if the length dimension of the wire 86 movable along the lead-out passage 63p is increased, the generation period of the lead-out load of the webbing 12 due to the lead-out resistance of the wire 86 can be extended.
  • the take-up drum 30 rotates about two turns less with respect to the ratchet gear 61, the draw-out load of the webbing 12 is generated by the draw-out resistance of the wire 86.
  • the length dimension of the wire 86 may be appropriately adjusted in accordance with the generation mode of the preferred withdrawal load.
  • the wire-type pullout load generating mechanism 80 may be omitted. Further, as an impact absorbing mechanism provided separately from the torsion bar type pulling out load generating mechanism 90, a configuration different from the wire type pulling out load generating mechanism 80 using the wire 86 may be adopted.
  • ⁇ Torsion bar type load generating mechanism> 15 is a perspective view showing the torsion bar 38 and the restraining mechanism 92
  • FIG. 16 is a cross-sectional view showing the torsion bar 38 and the restraining mechanism 92
  • FIG. 17 is an exploded cross-sectional view showing the restraining mechanism 92.
  • the torsion bar type pullout load generating mechanism 90 torsionally deforms the torsion bar 38 by relative rotation between the winding drum 30 and the ratchet gear 61, It is a mechanism that generates a pulling-out load of the webbing 12 by the force required for the torsional deformation.
  • the restraining mechanism 92 between the winding drum 30 and the torsion bar 38, the torsion deformation of the torsion bar 38 is started later than the start of the relative rotation between the winding drum 30 and the ratchet gear 61. I am trying to do it.
  • the torsion bar 38 as a relay member is a member formed of a metal material or the like which can be torsionally deformed, and has a rod-like shape which can be disposed in the axial hole portion 36 of the winding drum 30,
  • the outer diameter of the shaft hole 36 is smaller than the inner diameter of the shaft hole 36.
  • the length dimension of the torsion bar 38 is smaller than the length dimension of the shaft hole 36.
  • One end 38 a of the torsion bar 38 is attached to the ratchet gear 61 so as not to be relatively rotatable.
  • one end 38a of the torsion bar 38 is formed in a shape (here, spline shape) in which the cross section in the plane orthogonal to the axial direction exhibits a non-circular shape, and the other end 38b is a ratchet gear It is fitted in the above-mentioned fitting hole 62a formed in 61 in a non-rotatable manner.
  • a restraint mechanism 92 is attached to the other end 38 b of the torsion bar 38.
  • the other end 38b of the torsion bar 38 is formed with a fitting hole 38bh in which the cross section in the plane orthogonal to the axial direction exhibits a non-circular shape, and will be described next using this fitting hole 38bh
  • the restraint mechanism 92 is attached to the
  • the restraining mechanism 92 is provided between the winding drum 30 and the other end 38b of the torsion bar 38, and in a state before the winding drum 30 and the torsion bar 38 rotate relative to each other by a predetermined amount, It is configured to allow relative rotation with the bar 38 and to restrain the winding drum 30 and the torsion bar 38 so as not to be able to rotate relative to each other after the winding drum 30 and the torsion bar 38 rotate relative to each other by a predetermined amount. .
  • the restraining mechanism 92 includes the shaft member 94 and the ring member 96.
  • the shaft member 94 is provided at the other end 38 b of the torsion bar 38 so as not to be relatively rotatable.
  • the ring member 96 is configured to be able to be externally fitted to the shaft member 94, and is provided to the winding drum 30 so as not to be relatively rotatable. Further, the ring member 96 is movable along the rotational axis direction of the winding drum 30 as a movable portion. Then, when the shaft member 94 and the ring member 96 rotate relative to each other, the relative rotational movement is converted into a movement for moving the ring member 96 along the rotation axis direction, whereby the ring member 96 is moved in the rotation axis direction.
  • the shaft member 94 is formed in a round bar shape.
  • One end 94a of the shaft member 94 is formed in a non-circular shape in a cross section in a plane orthogonal to the axial direction, and can not be relatively rotated in the fitting hole 38bh at the other end of the torsion bar 38 It is fitted.
  • the middle portion in the longitudinal direction of the shaft member 94 is formed as a restricting portion 94 b whose outer diameter is larger than that of the both end portions.
  • the restriction portion 94 b causes the shaft member 94 and the ring member 96 to move relative to each other along the rotational axis direction of the winding drum 30. Play a role in regulating movement. Furthermore, the other end of the shaft member 94 is formed in the male screw portion 94c.
  • the ring member 96 is formed in a ring shape that can be externally fitted to the externally threaded portion 94 c of the shaft member 94.
  • the outer peripheral shape of the ring member 96 is formed in a non-circular shape (here, a spline shape having a plurality of protruding portions) in a cross-sectional shape in a plane perpendicular to the axial direction.
  • the outer peripheral shape of the ring member 96 can be fitted in the deep portion of the shaft hole portion 36 of the winding drum 30 so that the ring member 96 can not be relatively rotated and can be moved along its axial direction.
  • a fitting recess 36a is formed having a shape corresponding to (see FIG. 12). Then, the ring member 96 is fitted into the fitting recess 36 a on the back side of the shaft hole portion 36 of the winding drum 30 so as to be relatively non-rotatable and movable along the axial direction thereof.
  • the inner peripheral portion of the ring member 96 is formed in a female screw portion 96a which can be screwed with the male screw portion 94c. Therefore, when the male screw portion 94c of the shaft member 94 is screwed into the female screw portion 96a of the ring member 96, the shaft member 94 and the ring member 96 approach along the axial direction when the two are relatively rotated. It will move relative to the direction or away direction.
  • the ring member 96 on the winding drum 30 side rotates relative to the shaft member 94 on the torsion bar 38 side.
  • the ring member 96 is moved closer to the shaft member 94.
  • the shaft member may be provided on the winding drum side so as not to allow relative rotation, and the ring member may be provided on the torsion bar so as not to allow relative rotation. Further, the shaft member may be moved by relative rotation between the shaft member and the ring member, or both of the ring member and the shaft member may be moved. Further, the restricting portion for restricting the movement of at least one of the shaft member and the ring member in the direction of the rotation axis may be incorporated in at least one of the shaft member and the ring member, or may be incorporated in the other portion It is also good. For example, the movement may be restricted by moving the ring member in a direction away from the shaft member, and the ring member abutting on the bottom of the shaft hole of the winding drum. In this case, the restricting portion is the bottom of the axial hole portion of the winding drum (see the fourth modification described later).
  • the pitch P1 of the thread of the externally threaded portion 94c of the shaft member 94 is different from the pitch P2 of the threaded groove of the internally threaded portion 96a of the ring member 96 (see FIGS. 16 and 17).
  • the pitch P2 of the thread groove is set smaller than the pitch P1 of the thread. Therefore, when screwing the male screw portion 94c of the shaft member 94 and the screw groove of the female screw portion 96a of the ring member 96, it is necessary to plastically deform at least one of them.
  • the force required for plastic deformation is the force required to relatively rotate the externally threaded portion 94c of the shaft member 94 and the internally threaded portion 96a of the ring member 96, ie, relative rotation of the winding drum 30 with respect to the torsion bar 38. It will be the force required to This force acts as a force acting as a resistance when pulling out the webbing 12, that is, as a part of the pulling-out load of the webbing 12.
  • the pitch of the screw groove and the pitch of the thread are changed as described above.
  • a configuration may be adopted in which one of the height and width of the thread is made larger than one of the depth and width of the thread groove.
  • a gap is provided between the restricting portion 94 b of the shaft member 94 and the end of the ring member 96 on the shaft member 94 side.
  • the gap is equal to or greater than a distance corresponding to one pitch (for example, a distance of about three rotations) in which the ring member 96 moves along the rotation axis direction by one rotation of the ring member 96 with respect to the shaft member 94 preferable.
  • one end portion of the wire 86 is attached to the winding drum 30 so as not to be rotatable relative to the winding drum 30, and the longitudinal direction intermediate portion and the other end portion of the wire 86 are cylindrical portions 37 It is arranged in a spiral around the. Moreover, the longitudinal direction middle part of the wire 86 is arrange
  • a gap is provided between the restricting portion 94b of the shaft member 94 and the end of the ring member 96 on the shaft member 94 side. It is in the closed state (see FIG. 12). In this state, preferably, the ring member 96 is in contact with the bottom of the fitting recess 36 a of the axial hole 36.
  • the take-up drum 30 and the ratchet gear 61 can not rotate relative to each other because of the arrangement structure of the wire 86.
  • the longitudinal direction intermediate portion and the other end portion of the wire 86 are drawn out while being provided with a drawing resistance in the drawing-out path 63p, and the winding drum 30 rotates with respect to the ratchet gear 61, and the webbing 12 gradually Drawn out.
  • the lead-out load which is a resistance when the webbing 12 is pulled out, is generated by the pull-out resistance of the wire 86, and the impact energy is absorbed. That is, at an early stage, impact energy is absorbed by the extraction load generated by the extraction resistance of the wire 86.
  • the withdrawal load of the webbing 12 due to the withdrawal resistance of the wire 86 continues to occur until the intermediate portion and the other end of the wire 86 have completely passed through the withdrawal path 63p and are completely withdrawn.
  • the torsion bar 38 and the shaft member 94 can not be rotated relative to the ratchet gear 61, and the ring member 96 can not rotate relative to the winding drum 30. Therefore, when the winding drum 30 rotates with respect to the ratchet gear 61, the ring member 96 rotates relative to the shaft member 94. When the ring member 96 rotates relative to the shaft member 94, the ring member 96 moves close to the shaft member 94, and the ring member 96 abuts on the restriction portion 94 b of the shaft member 94.
  • the movement of the ring member 96 in the rotation axis direction with respect to the shaft member 94 is restricted, the relative rotation between the shaft member 94 and the ring member 96 is also restricted, and the winding drum 30 and the torsion bar 38 can not be relatively rotated. Restrained. Then, the torsion bar 38 is twisted between one end 38 a of the torsion bar 38 on the ratchet gear 61 side and the other end 38 b on the winding drum 30 side. The twisting of the torsion bar 38 generates an extraction load that serves as a resistance when the webbing 12 is extracted, and the impact energy is absorbed.
  • the generation start timing of the extraction load by the torsion bar 38 is preferably during the extraction load generation by the wire 86. That is, it is preferable that the restricting portion 94 b of the shaft member 94 abuts on the ring member 96 until the wire 86 is completely pulled out from the lead-out path 63 p, and the torsion bar 38 starts to be twisted. Also in the present embodiment, description will be made on the premise that the settings are made as described above. As a result, after the initial stage, the pull-out load generated by the torsional deformation of the torsion bar 38 and the pull-out load by the pull-out resistance of the wire 86 are combined to generate the pull-out load of the webbing 12 and the impact energy is absorbed. Ru.
  • the adjustment of the timing is the length of the wire 86 (for example, the length of the wire 86 is made sufficiently long), the size of the gap between the restricting portion 94 b of the shaft member 94 and the ring member 96 in the standby state, It can carry out by setting a pitch etc. appropriately.
  • the extraction load generation end timing by the wire 86 and the extraction start timing of the extraction load by the torsion bar 38 may be simultaneous.
  • FIG. 18 is a view showing an example of the extraction load generation characteristic.
  • the upper graph shows the extraction load generation characteristics of the entire extraction load generation mechanism
  • the middle graph shows the extraction load generation characteristics of the wire type extraction load generation mechanism 80
  • the lower graph shows the torsion bar type.
  • the drawing load generation characteristic by the drawing load generation mechanism 90 and the restraint mechanism 92 is shown.
  • the horizontal axis of each graph indicates the amount of withdrawal of the webbing 12, and the vertical axis indicates the withdrawal load.
  • the wire-type pullout load generating mechanism 80 generates a pullout load F1 of a certain degree from a relatively early stage after the start of pulling out the webbing 12.
  • the pull-out load F1 generated by the wire-type pull-out load generation mechanism 80 continues to be generated to some extent (see the middle graph in FIG. 18).
  • the extraction load F2 is also generated by the relative movement of the shaft member 94 and the ring member 96 of the restraint mechanism 92 while plastically deforming (lower stage in FIG. 18). See the graph of).
  • the extraction load (F1 + F2) in which the extraction load F2 by the restraint mechanism 92 is added to the extraction load F1 by the wire-type extraction load generation mechanism 80 at a relatively early stage after the extraction of the webbing 12 starts Works.
  • the stage at which the torsional deformation of the torsion bar 38 occurs is determined empirically and empirically so that impact energy can be effectively absorbed.
  • the restraining mechanism 92 is provided between the winding drum 30 and the other end 38 b of the torsion bar 38, and is in a state before they rotate relative to each other by a predetermined amount.
  • the relative rotation between the winding drum 30 and the torsion bar 38 is permitted, and after the relative rotation between the winding drum 30 and the torsion bar 38 by a predetermined amount, the relative rotation between the winding drum 30 and the torsion bar 38 is restricted. Therefore, after the winding drum 30 and the torsion bar 38 rotate relative to each other by a predetermined amount, the torsion bar 38 is torsionally deformed. Therefore, the start timing of the generation operation of the extraction load of the webbing 12 due to the torsional deformation of the torsion bar 38 can be delayed, and the freedom of the timing of the generation operation of the extraction load of the webbing 12 can be improved.
  • the locking device is configured such that one end of the torsion bar is non-rotatably connected to the bobbin and the other end of the torsion bar is non-rotatably connected to the locking device.
  • the impact energy absorbing operation by the torsion bar is performed. Therefore, there is a problem that the setting freedom of the timing of the webbing pullout load generation operation by the torsion bar is low.
  • the start timing of the generation operation of the extraction load of the webbing 12 due to the torsional deformation of the torsion bar 38 is delayed, and the extraction load generation operation of the webbing 12 is delayed. It is possible to improve the degree of freedom.
  • the restraining mechanism 92 does not necessarily have to include the shaft member 94 and the ring member 96.
  • the other end of the torsion bar is formed in a non-circular cross sectional shape such as a spline, and the recess in the back of the shaft hole of the winding drum rotates the other end of the torsion bar only within a predetermined rotation range. It may be configured to have a non-circular cross-sectional shape that allows for In this case, it is possible to delay the torsional deformation of the torsion bar between the winding drum and the torsion bar rotating once relative to each other. A similar structure may be applied to the joint of the torsion bar and the ratchet gear.
  • the restraining mechanism 92 is movable along the rotational axis of the winding drum 30 according to the relative rotation between the winding drum 30 and the torsion bar 38.
  • a restricting portion 94 b which restricts the movement of the ring member 96 by a predetermined amount or more.
  • the restricting portion 94 b restricts the movement of the ring member 96 to restrict relative rotation of the winding drum 30 and the torsion bar 38 beyond a predetermined amount.
  • the restraining mechanism 92 includes a shaft member 94 and a ring member 96 that can be externally fitted to the shaft member 94.
  • the shaft member 94 is provided so as not to be rotatable relative to the torsion bar 38, and the ring member 96 is
  • the winding drum 30 is provided so as to be relatively non-rotatable, and the ring member 96 is movable as a movable portion along the rotational axis direction of the winding drum 30. Further, when the shaft member 94 and the ring member 96 rotate relative to each other, the shaft member 94 and the ring member 96 are relatively movable along the rotation axis direction. When the relative rotation between the shaft member 94 and the ring member 96 exceeds a predetermined amount, the restricting portion 94 b restricts the relative movement of the shaft member 94 and the ring member 96 along the rotational axis.
  • the torsion bar 38 and the take-up drum 30 are relatively non-rotatably restrained by the restraining mechanism 92.
  • a withdrawal load can be generated, and the freedom of the timing of the withdrawal load of the webbing 12 can be further improved.
  • the restraint mechanism 92 includes the ring member 96 as a movable portion that can move along the rotational axis direction of the winding drum 30 according to the relative rotation of the winding drum 30 and the torsion bar 38; A relative rotation exceeding the predetermined amount between the winding drum 30 and the torsion bar 38 by including the restricting portion 94b which restricts the movement of the ring member 96 by a predetermined amount or more and restricting the movement of the ring member 96.
  • the restraint mechanism 92 restrains the torsion bar 38 and the take-up drum 30 so that relative rotation is not possible.
  • the drawing load of the webbing 12 by the bar 38 can be generated, and the freedom of the timing of the drawing load of the webbing 12 can be further improved.
  • the restraint mechanism is configured to intervene between relay members as various shock absorbing members such as wire shock absorbing members and the winding drum or rotation regulating member, and delay the shock absorbing operation by the shock absorbing member by one or more rotations. It can be adopted as And in this case, the above-mentioned restraint mechanism should just be provided in either part of a portion which reaches a rotation control member via a relay member from a winding drum.
  • the shaft member 94 of the restraint mechanism 92 includes an externally threaded portion 94c
  • the ring member 96 includes an internally threaded portion 96a capable of threading the externally threaded portion 94c. Therefore, the axial member 94c is engaged with the internally threaded portion 96a. The relative rotation of the ring 94 and the ring member 96 can more reliably move them in the direction of the rotation axis.
  • the shaft member 94 formed separately from the torsion bar 38 is attached to the torsion bar 38. Therefore, the torsion bar 38 and the shaft member 94 can be formed of materials suitable for the respective purposes.
  • the shaft member 94 is formed of a relatively hard material suitable for the function of suppressing relative rotation between the winding drum 30 and the torsion bar 38 as the restraining mechanism 92, and the torsion bar 38 has an appropriate torsional deformation.
  • the shaft member 94 and the ring member 96 relatively move along the rotational axis direction while the shaft member 94 and the ring member 96 relatively rotate, at least one of them is plastically deformed, the shaft member The relative load between the ring 94 and the ring member 96 can also generate a pull-out load of the webbing 12.
  • the winding drum 30 and the torsion bar 38 are connected so as not to rotate relative to each other in the standby state, and when the winding drum 30 is subjected to a force in the pulling direction of the webbing 12 due to an impact, it is pulled out. Since a wire type pulling out load generating mechanism 80 as an impact absorbing member is provided which allows relative rotation between the winding drum 30 and the ratchet gear 61 while generating loading, more various webbing pulling out loads are generated. Can.
  • the wire-type pullout load generating mechanism 80 is not necessarily required. Even in this case, for example, at a relatively early stage after the start of pulling out the webbing 12, a pullout load is generated due to relative movement between the shaft member 94 and the ring member 96 of the restraint mechanism 92. After a certain period of time has elapsed from the start of the extraction of the webbing 12, by generating the extraction load due to the torsional deformation of the torsion bar 38, it is possible to produce the extraction load characteristic in which the extraction load increases stepwise.
  • the torsion bar 38 since generation of the extraction load of the webbing 12 by the torsion bar 38 is started during generation of the extraction load of the webbing 12 by the wire-type extraction load generation mechanism 80, extraction by the wire-type extraction load generation mechanism 80 is started.
  • the pullout load by the torsion bar 38 can be added to the load to increase the pullout load of the webbing 12 in stages.
  • the wire-type pullout load generating mechanism 80 includes the wire 86 drawn out while being deformed by relative rotation between the winding drum 30 and the ratchet gear 61, the pullout load of the webbing 12 is generated by the deformation of the wire 86. be able to. In particular, by setting the wire 86 long, a stable extraction load can be generated over a relatively long period of time.
  • the shaft member 94 and the torsion bar 38 are separately formed.
  • the shaft member portion 194 corresponding to the shaft member 94 and the torsion bar portion 138 corresponding to the torsion bar 38 appropriately press and cut the rod-like member May be integrally formed.
  • the shaft member portion 194 and the torsion bar portion 138 can be easily manufactured.
  • the ring member may be integrally formed on the torsion bar.
  • the male screw portion 94c is formed on the shaft member 94 and the female screw portion 96a is formed on the ring member 96.
  • such a configuration is not necessarily required.
  • ring member 296 corresponding to ring member 96, instead of forming female screw portion 96a, a portion of male screw portion 94c around its inner periphery.
  • the screw groove may be provided with a protrusion 296c movable along the extending direction of the groove. In this case, when the ring member 296 and the shaft member 94 are relatively rotated, the protrusion 296c moves along the thread groove of the male screw portion 94c.
  • the ring member 296 and the shaft member 94 move relative to each other along the axial direction, and the ring member 296 abuts against the restricting portion 94 b, and the relative movement of the ring member 296 and the shaft member 94 in the axial direction is restricted. Be done. As a result, relative rotation between the ring member 296 and the shaft member 94 becomes impossible, and the take-up drum 30 and the torsion bar 38 are restrained from relative rotation. Then, the torsional deformation of the torsion bar 38 is started.
  • one member is formed with a helical protrusion or a recessed groove
  • the other member is formed with a guide portion capable of inserting the protrusion or a guide protrusion engageable with the recessed groove, and the relative rotation between one member and the other member causes the guide portion or the guide protrusion to be spirally formed.
  • the restraint mechanism 92 may be interposed between the torsion bar 338 corresponding to the torsion bar 38 and the ratchet gear 361 corresponding to the ratchet gear 61.
  • one end (the left end in FIG. 22) of the torsion bar 338 is connected to the back of the shaft member 94 of the winding drum 30 so as not to be relatively rotatable. Further, at the other end (right end in FIG. 22) of the torsion bar 338, a restraining mechanism 92 is provided.
  • the restraint mechanism 92 one having the same configuration as that described in the above embodiment is used.
  • the shaft member 94 of the restraining mechanism 92 is connected to the other end of the torsion bar 338 so as not to be relatively rotatable. Further, the inner peripheral portion of the cylindrical portion 362 at the central portion on the take-up drum 30 side of the ratchet gear 361 is formed in a concave shape in which the ring member 296 can not be relatively rotated and movably fitted along the rotational axis direction. There is. Then, the ring member 96 is fitted in the cylindrical portion 362 such that relative rotation is impossible and movement is possible along the rotation axis direction.
  • the shaft member 94 and the ring member 96 rotate relative to each other as in the above embodiment, and the shaft member 94 and the ring member 96 Moves along the rotational axis direction. Then, when the ring member 96 abuts on the restricting portion 94 b of the ring member 96, relative rotation between the shaft member 94 and the ring member 96 is restricted, and torsional deformation of the torsion bar 38 starts.
  • the ring member 96 which is a member provided on the winding drum 30 or the ratchet gear 361 side of the shaft member 94 and the ring member 96 of the restraining mechanism 92 is arranged along the rotational axis direction.
  • one end of the torsion bar 438 corresponding to the torsion bar 38 is relatively unrotatable in the back of the shaft hole 36 of the winding drum 30 and in the rotational axis direction It is movably connected along.
  • a shaft member 494 corresponding to the shaft member 94 is integrally formed.
  • the shaft member 494 is formed with an externally threaded portion 494 c.
  • the torsion bar 438 and the shaft member 494 may be separately formed and later coupled.
  • a ring member 496 corresponding to the ring member 96 is integrally formed at the central portion of the ratchet gear 461 corresponding to the ratchet gear 61 on the side of the winding drum 30, instead of the cylindrical portion 62.
  • the inner peripheral portion of the ring member 496 is formed with a female screw portion 496a into which the male screw portion 494c can be screwed.
  • the member for restricting the movement of the shaft member or the ring member does not have to be in direct contact with the shaft member or the ring member to restrict their movement, but by abutting on the member moving with them, the shaft member or the ring The movement of the member may be restricted.
  • the shaft member 494 and the ring member 496 may be provided in the opposite positional relationship.
  • the shaft member and the ring member are moved in the direction away from each other by relative rotation.
  • the torsion bars may be brought into contact with the ratchet gear side to restrict their relative rotation.
  • the shaft member 494 and the ring member 496 rotate relative to each other, the shaft member 494 and the torsion bar 438 integrally formed on the shaft member 494 move in the direction approaching the ring member 496 along the rotation axis direction. May be In this case, when the shaft member 494 abuts on the ratchet gear 461 provided with the ring member 496, the further movement of the shaft member 494 and the torsion bar 438 is restricted, and the relative rotation between the torsion bar 438 and the ratchet gear 461 Is regulated.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automotive Seat Belt Assembly (AREA)

Abstract

L'invention a pour objectif d'améliorer le degré de liberté dans le début de la génération d'une charge d'extraction de sangle. Un système de rétraction de ceinture de sécurité comprend : un tambour d'enroulement ; un élément de régulation de rotation (un engrenage à cliquet, par exemple), passant d'un état permettant la rotation à un état de régulation de rotation et inversement ; un élément de relais (une barre de torsion, par exemple) dont une extrémité est fixée au tambour d'enroulement ou à l'élément de régulation de rotation de façon à être incapable d'effectuer une rotation relative ; et un mécanisme de limitation. Le mécanisme de limitation, ménagé entre l'autre extrémité de l'élément de relais et l'autre élément parmi le tambour d'enroulement et l'élément de régulation de rotation, permet une rotation relative entre l'élément de relais et l'autre élément parmi le tambour d'enroulement et l'élément de régulation de rotation tandis que l'élément de relais et l'autre élément parmi le tambour d'enroulement et l'élément de régulation de rotation doivent encore tourner de manière relative sur une distance prédéterminée, et bloque l'élément de relais et l'autre élément parmi le tambour d'enroulement et l'élément de régulation de rotation, de façon à éviter la rotation relative après que l'élément de relais et l'autre élément parmi le tambour d'enroulement et l'élément de régulation de rotation ont tourné de manière relative sur la distance prédéterminée.
PCT/JP2014/059627 2013-04-02 2014-04-01 Système de rétraction de ceinture de sécurité WO2014163073A1 (fr)

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WO2016171226A1 (fr) * 2015-04-24 2016-10-27 株式会社東海理化電機製作所 Dispositif enrouleur de ceinture
WO2016171057A1 (fr) * 2015-04-24 2016-10-27 株式会社東海理化電機製作所 Dispositif enrouleur de ceinture de sécurité
JP2016203844A (ja) * 2015-04-24 2016-12-08 株式会社東海理化電機製作所 ウェビング巻取装置
JP2016203845A (ja) * 2015-04-24 2016-12-08 株式会社東海理化電機製作所 ウェビング巻取装置
WO2022023667A1 (fr) * 2020-07-29 2022-02-03 Lisi Automotive Composant mécanique présentant un couple de rotation résistant contrôlé

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JP6795458B2 (ja) * 2017-06-02 2020-12-02 株式会社東海理化電機製作所 ウェビング巻取装置
JP7168283B2 (ja) * 2018-09-27 2022-11-09 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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JP2010089528A (ja) * 2008-10-03 2010-04-22 Autoliv Development Ab シートベルト装置
JP2011016516A (ja) * 2009-06-11 2011-01-27 Tokai Rika Co Ltd ウエビング巻取装置
JP2011105281A (ja) * 2009-11-20 2011-06-02 Autoliv Development Ab シートベルト用リトラクタ
JP2012180040A (ja) * 2011-03-02 2012-09-20 Ashimori Industry Co Ltd シートベルト用リトラクタ
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JPH11157416A (ja) * 1997-11-28 1999-06-15 Tokai Rika Co Ltd 回転量制限装置及びウエビング巻取装置
JP2010089528A (ja) * 2008-10-03 2010-04-22 Autoliv Development Ab シートベルト装置
JP2011016516A (ja) * 2009-06-11 2011-01-27 Tokai Rika Co Ltd ウエビング巻取装置
JP2011105281A (ja) * 2009-11-20 2011-06-02 Autoliv Development Ab シートベルト用リトラクタ
JP2012180040A (ja) * 2011-03-02 2012-09-20 Ashimori Industry Co Ltd シートベルト用リトラクタ
JP2013049401A (ja) * 2011-08-31 2013-03-14 Tokai Rika Co Ltd ウェビング巻取装置

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Publication number Priority date Publication date Assignee Title
WO2016171226A1 (fr) * 2015-04-24 2016-10-27 株式会社東海理化電機製作所 Dispositif enrouleur de ceinture
WO2016171057A1 (fr) * 2015-04-24 2016-10-27 株式会社東海理化電機製作所 Dispositif enrouleur de ceinture de sécurité
JP2016203844A (ja) * 2015-04-24 2016-12-08 株式会社東海理化電機製作所 ウェビング巻取装置
JP2016203847A (ja) * 2015-04-24 2016-12-08 株式会社東海理化電機製作所 ウェビング巻取装置
JP2016203845A (ja) * 2015-04-24 2016-12-08 株式会社東海理化電機製作所 ウェビング巻取装置
US10202098B2 (en) 2015-04-24 2019-02-12 Kabushiki Kaisha Tokai-Rika-Denki-Seisakusho Webbing take-up device
WO2022023667A1 (fr) * 2020-07-29 2022-02-03 Lisi Automotive Composant mécanique présentant un couple de rotation résistant contrôlé
FR3113012A1 (fr) * 2020-07-29 2022-02-04 Lisi Automotive Composant mécanique présentant un couple de rotation résistant contrôlé

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