WO2020031609A1 - Dispositif d'enroulement de sangle - Google Patents

Dispositif d'enroulement de sangle Download PDF

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Publication number
WO2020031609A1
WO2020031609A1 PCT/JP2019/027582 JP2019027582W WO2020031609A1 WO 2020031609 A1 WO2020031609 A1 WO 2020031609A1 JP 2019027582 W JP2019027582 W JP 2019027582W WO 2020031609 A1 WO2020031609 A1 WO 2020031609A1
Authority
WO
WIPO (PCT)
Prior art keywords
clutch
ratchet
spool
spacer
engaged
Prior art date
Application number
PCT/JP2019/027582
Other languages
English (en)
Japanese (ja)
Inventor
貴雅 佐藤
裕也 永田
Original Assignee
株式会社東海理化電機製作所
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 株式会社東海理化電機製作所 filed Critical 株式会社東海理化電機製作所
Publication of WO2020031609A1 publication Critical patent/WO2020031609A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/28—Safety belts or body harnesses in vehicles incorporating energy-absorbing devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/34—Belt retractors, e.g. reels
    • B60R22/46—Reels with means to tension the belt in an emergency by forced winding up
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/48—Control systems, alarms, or interlock systems, for the correct application of the belt or harness

Definitions

  • the present invention relates to a webbing winding device.
  • Japanese Patent Application Laid-Open Nos. 2010-208639 and 2014-125183 disclose a webbing take-up device in which a webbing mounted on an occupant is taken up by a spool by transmitting a rotational force of a motor to the spool. ing.
  • the webbing take-up device includes a clutch that transmits the rotational force of the motor to the spool. When the clutch operates, the rotational force of the motor is transmitted to the spool.
  • an object of the present invention is to provide a webbing take-up device capable of suppressing the operation of one clutch from being hindered by the other clutch.
  • the webbing take-up device is configured to transmit a rotational force to the spool or to transmit a rotational force from the spool by operating the spool around which the webbing to be mounted on the occupant is taken up.
  • the webbing take-up device is the webbing take-up device according to the first aspect, wherein the spool is rotated in a take-up direction so that the webbing is taken up and the webbing is drawn out. Further comprising a force limiter mechanism that is rotated in the pull-out direction at a time and allows the spool to rotate in the pull-out direction with a force limiter load or more, and the first clutch is provided so as to be integrally rotatable with the spool and is operated. The second clutch is engaged with the first clutch via the spacer by being engaged with an engaged member provided on the outer side in the rotation radial direction so that the force limiter load can be switched.
  • the webbing take-up device is the webbing take-up device according to the second aspect, wherein the first clutch is displaced radially outward to be engaged with the engaged member. And a cover portion that covers the ratchet side of the clutch piece, and the spacer includes a first restricting portion that restricts movement of the ratchet toward the cover portion.
  • the webbing take-up device is the webbing take-up device according to the third aspect, wherein the spacer includes a second restricting portion that restricts movement of the ratchet to a side opposite to the cover portion. I have.
  • a webbing take-up device is the webbing take-up device according to any one of the first to fourth aspects, wherein the first clutch is configured such that the ratchet is engaged via the spacer.
  • An engaging portion the spacer includes an intervening portion interposed between the ratchet engaging portion and the ratchet, and in a state before the engaging member is engaged with the ratchet, the interposing portion A gap is formed between the ratchet engaging portion and the ratchet, and when the engaging member is engaged with the ratchet and the ratchet is rotated, the interposed portion is deformed, and the ratchet is engaged with the ratchet. The ratchet engaging portion comes into contact with the ratchet engaging portion.
  • the webbing mounted on the occupant is taken up on the spool.
  • the rotational force is transmitted to the spool, or the rotational force from the spool is transmitted.
  • the second clutch is operated, the rotational force is transmitted to the spool, or the rotational force is transmitted from the spool.
  • a spacer is provided between the first clutch and the second clutch.
  • the webbing take-up device includes a force limiter mechanism.
  • the force limiter mechanism allows the spool to rotate in the pull-out direction when the load is equal to or greater than the force limiter load. Then, when the first clutch is operated and the first clutch is engaged with the engaged member, the force limiter load can be switched.
  • the engaging member is engaged with the ratchet, the rotational force in the spool winding direction is transmitted to the ratchet. Thereby, the torque of the ratchet is transmitted to the spool via the first clutch, and the spool is rotated in the winding direction.
  • the ratchet is engaged with the first clutch via the spacer. Thereby, the influence on the operation of the first clutch due to the interference of the ratchet with the first clutch is suppressed.
  • the force limiter load can be switched.
  • the rotational force in the spool winding direction is transmitted to the ratchet.
  • the rotational force of the ratchet is transmitted to the spool via the ratchet engaging portion of the first clutch, and the spool is rotated in the winding direction.
  • the cover portion of the first clutch covers the ratchet side of the clutch piece. Then, the movement of the ratchet toward the cover portion of the first clutch is restricted by the first restricting portion of the spacer. This suppresses the influence of the ratchet on the operation of the first clutch due to interference with the cover portion and the clutch piece of the first clutch.
  • the movement of the ratchet to the side opposite to the cover portion is restricted by the second restricting portion of the spacer. This can prevent the ratchet from coming off the spacer.
  • a gap is formed between the ratchet engagement portion and the ratchet by the intervening portion of the spacer.
  • generation of abnormal noise due to contact between the ratchet engaging portion and the ratchet is suppressed.
  • the engagement member is engaged with the ratchet and the ratchet is rotated, the interposed portion of the spacer is deformed, and the ratchet and the ratchet engagement portion come into contact. Thereby, the rotational force of the ratchet can be directly transmitted to the ratchet engaging portion. As a result, it is not necessary to give the spacer a strength corresponding to the rotational force of the ratchet, and the weight of the spacer can be reduced.
  • FIG. 5 is an exploded perspective view showing the spool assembly in an exploded manner.
  • FIG. 3 is an exploded perspective view showing a first clutch in an exploded manner.
  • FIG. 4 is an exploded perspective view showing the switching mechanism in an exploded manner. It is an expanded sectional view which expands and shows the end part of the axial direction one side of a spool. It is a top view showing a spacer. It is a side view which shows a spacer. It is a bottom view showing a spacer. It is a top view which shows the ratchet engaged with the ratchet engaging part of the guide part via the spacer.
  • a webbing take-up device according to an embodiment of the present invention will be described with reference to FIGS. 1 to 8B.
  • the webbing take-up device 10 of the present embodiment includes a frame 12, a spool 14, a webbing (not shown), a force limiter mechanism 16, a pretensioner mechanism 18, a first clutch 20, A switching mechanism 22, a pre-crash safety mechanism 24, and a winding attachment urging mechanism 26 are provided.
  • the terms “axial direction”, “radial direction”, and “circumferential direction” indicate the rotational axis direction, the rotational radial direction, and the rotational circumferential direction of the spool unless otherwise specified.
  • the frame 12 has a plate-shaped back plate 12A fixed to the vehicle body.
  • Leg pieces 12B and 12C extend substantially at right angles from both ends in the width direction of the back plate 12A.
  • a well-known lock mechanism and a pretensioner mechanism 18 are provided on the leg piece 12C side.
  • a switching mechanism 22, a pre-crash safety mechanism 24, and a winding attachment mechanism 26 are provided on the leg piece 12B side.
  • the spool 14 is formed in a cylindrical shape having a through hole 14A (see FIG. 2) penetrating in the axial direction, and is disposed between the leg piece 12B and the leg piece 12C of the frame 12.
  • the spool 14 is rotatably supported by the frame 12 via a main torsion shaft 28, a sub torsion shaft 30, and the like, which will be described later.
  • the webbing is mounted on the body of the occupant, and has a base end, which is one end in the longitudinal direction, locked to the spool 14.
  • the spool 14 is rotationally urged in one winding direction (the direction of arrow C in FIG. 1 and the like) by the urging force of a mainspring spring (not shown) constituting a part of the winding attachment urging mechanism 26. .
  • a mainspring spring constituting a part of the winding attachment urging mechanism 26.
  • the webbing is wound on the spool 14 from the base end side.
  • the spool 14 is rotated in the pulling-out direction (the direction opposite to the arrow C in FIG. 1 and the like) which is the other rotation direction.
  • the force limiter mechanism 16 includes a main torsion shaft 28, a sub-torsion shaft 30, and the like.
  • the main torsion shaft 28 is arranged coaxially with the spool 14.
  • a part of the main torsion shaft 28 is fixed to a lock gear (not shown) constituting a part of a lock mechanism so as to be integrally rotatable with the lock gear.
  • the other part of the main torsion shaft 28 is fixed to the spool 14 so as to be integrally rotatable while being arranged on the inner peripheral portion of the spool 14.
  • the portion of the main torsion shaft 28 between the portion fixed to the lock gear and the portion fixed to the spool 14 is torsionally deformed so that the kinetic energy of the occupant used for pulling the webbing is absorbed. It has become.
  • the sub-torsion shaft 30 is arranged coaxially with the main torsion shaft 28, and the base end side of the sub-torsion shaft 30 from the center in the longitudinal direction is inserted into the through hole 14A of the spool 14.
  • the base end of the sub-torsion shaft 30 is fixed to the spool 14 so as to be able to rotate integrally with the spool 14.
  • the distal end side of the sub-torsion shaft 30 from the longitudinal center portion protrudes from the spool 14 to the other axial side.
  • a spline-shaped engaging portion 30A is formed at the tip of the sub-torsion shaft 30. Then, the portion between the engagement portion 30A and the portion fixed to the spool 14 in the sub-torsion shaft 30 is torsionally deformed, so that the kinetic energy of the occupant used for pulling the webbing is absorbed. ing.
  • the first clutch 20 includes a sleeve 32, a clutch guide 34 as a guide, a clutch base 36, a clutch cover 38 as a cover, and a pair of clutch plates 40 as clutch pieces. , A screw 42 (see FIG. 2), and a pair of coil springs 44.
  • the sleeve 32 is arranged coaxially with the sub-torsion shaft 30 (see FIG. 2).
  • a through hole 32A penetrating in the axial direction is formed in the axial center of the sleeve 32, and the sub torsion shaft 30 is loosely inserted into the through hole 32A.
  • a spline-shaped engaged portion 32B is formed on an inner peripheral portion of the sleeve 32, and an engaging portion 30A (see FIG. 2) of the sub-torsion shaft 30 is engaged with the engaged portion 32B. Have been. Thereby, the sleeve 32 is engaged with the sub-torsion shaft 30 so as to be integrally rotatable.
  • the side of the sleeve 32 on the spool 14 side is a support portion 32C having a circular outer shape.
  • the opposite side of the sleeve 32 from the spool 14 is a fitting portion as a ratchet engaging portion having a hexagonal outer shape. 32D.
  • the clutch guide 34 is formed in an annular shape having a through hole 34A penetrating in the axial direction.
  • the support portion 32C described above is inserted into the through hole 34A, whereby the clutch guide 34 is supported by the sleeve 32 so as to be relatively rotatable.
  • a pair of coil spring housing portions 34B for housing the coil springs 44 are formed at two positions in the circumferential direction of the clutch guide 34.
  • a pair of clutch plate housing portions 34C for housing the pair of clutch plates 40 are formed adjacent to the respective coil spring housing portions 34B.
  • the clutch base 36 is formed integrally with the sleeve 32.
  • the clutch base 36 includes an annular portion 36A protruding radially outward from the sleeve 32. Further, the clutch base 36 includes a pair of locking portions 36B protruding radially outward from the annular portion 36A. These locking portions 36B are locked to a base end of an arm portion 40A of the clutch plate 40 described later.
  • the clutch cover 38 is disposed coaxially with the sleeve 32, is disposed on the opposite side of the clutch guide 34 from the spool 14, and is disposed to face the clutch guide 34.
  • the clutch cover 38 is formed in an annular shape having a through hole 38A penetrating in the axial direction, and a plurality of fitting claws 38B protruding radially inward are formed on an inner peripheral portion thereof.
  • the clutch cover 38 includes a spring locking portion 38C to which one end of the coil spring 44 is locked.
  • the above-described clutch guide 34 is relatively rotatable with respect to the clutch cover 38 by the urging force of the coil spring 44 compressed between the spring locking portion 38C and the above-described clutch guide 34.
  • the clutch plate 40 is disposed between the clutch cover 38 and the clutch guide 34.
  • the clutch plate 40 has an arm portion 40A and an arc portion 40B formed at the tip of the arm portion 40A.
  • a rotation shaft 40C that projects toward the clutch cover 38 and extends along the axial direction of the sub-torsion shaft 30 is formed.
  • the clutch plate 40 is rotatably (tilted) supported by the clutch cover 38 by inserting the rotating shaft 40C into a hole 38D formed in the clutch cover 38. Further, flat teeth knurled teeth 40D are formed on the outer peripheral portion of the arc portion 40B (the tip portion of the clutch plate 40).
  • the screw 42 includes a screw portion 42A, a winding attachment urging mechanism engaging portion 42B disposed coaxially with the screw portion 42A, and the screw portion 42A and the winding attaching urging mechanism engaging portion 42B. And a pressing portion 42C having a larger diameter than that of the pressing portion 42C.
  • the screw 42A is fixed to the sub-torsion shaft 30 by being screwed to the tip of the sub-torsion shaft 30 (see FIG. 2).
  • the winding attachment urging mechanism 26 (see FIG. 1) is engaged with the winding attachment urging mechanism engaging portion 42B. Thereby, the urging force of the mainspring spring forming a part of the winding attachment urging mechanism 26 is transmitted to the spool 14 via the screw 42 and the sub-torsion shaft 30.
  • the clutch guide 34 has a hole 34D.
  • a trigger wire 46 (see FIG. 2) is inserted into the hole 34D.
  • the relative rotation of the clutch guide 34 with respect to the spool 14 and the clutch cover 38 is restricted (the clutch Guide 34 is constrained to the inoperative position).
  • the switching mechanism 22 includes a case 48 formed in a box shape, a base cartridge 52 attached to the case 48 and supplied with gas generated by the gas generator 50, And a piston 54 that operates by receiving the pressure of the gas generated by 50.
  • the switching mechanism 22 includes a pawl 56 whose arrangement is switched by being pressed by the piston 54, and a lock ring 58 as an engaged member whose rotation is regulated by the pawl 56.
  • the pawl 56 is formed in a substantially plate shape, and includes a shaft portion 56A, and an arm portion 56B and an engaging portion 56C formed to extend radially outward of the shaft portion 56A. .
  • the shaft 56A is rotatably supported by the case 48. Further, in a state where the engaging portion 56C is engaged with a notch portion 58B of the lock ring 58 described later, the arm portion 56B is arranged so as to be close to the piston 54.
  • the lock ring 58 is formed in a substantially annular shape and is rotatably supported by the case 48.
  • the lock ring 58 is disposed coaxially with the first clutch 20 on the outer peripheral side of the first clutch 20 (see FIG. 2).
  • flat teeth knurl teeth 58A are formed on the inner peripheral portion of the lock ring 58.
  • a cutout portion 58B having a substantially triangular cross section is formed on the outer peripheral portion of the lock ring 58, and the cutout portion 58B is opened radially outward of the lock ring 58.
  • the pre-crash safety mechanism 24 includes a box-shaped case 60, a motor 62 attached to the case 60, and a motor 62 disposed in the case 60 and reducing the rotation of the motor 62. And a second clutch 66 (see FIG. 5) for transmitting the rotation of the motor 62 decelerated by the speed reducer 64 to the spool 14.
  • the second clutch 66 includes a ratchet 68 engaged with the sleeve 32 of the first clutch 20 via a spacer 72 described later so as to be integrally rotatable with the sleeve 32, and a radial direction of the ratchet 68. And a ratchet engaging piece 70 as an engaging member provided on the outside. In FIG. 5, hatching of the cross section of each member is omitted.
  • the ratchet 68 is formed in a disk shape arranged coaxially with the first clutch 20.
  • a plurality of ratchet teeth 68A with which the ratchet engaging pieces 70 engage are formed on the outer peripheral portion of the ratchet 68.
  • a fitting hole 68B having a hexagonal inner shape is formed in the center of the ratchet 68.
  • three connection grooves 68C in which a connection portion 72D of the spacer 72 described later is disposed are formed along the axial direction.
  • the three connection grooves 68C are arranged at regular intervals along the circumferential direction.
  • the ratchet engagement piece 70 rotates around the ratchet 68 in the winding direction of the spool 14 when the rotation of the motor 62 is transmitted through the speed reducer 64. It is configured to be displaced to the ratchet 68 side. The rotational force of the motor 62 is transmitted to the ratchet 68 by engaging the ratchet engaging piece 70 displaced to the ratchet 68 with the ratchet teeth 68A of the ratchet 68.
  • the rotational force transmitted to the ratchet 68 is transmitted to the spool 14 via the sleeve 32 and the sub-torsion shaft 30, so that the spool 14 is rotated in the winding direction, and the webbing is wound on the spool 14. It has become.
  • the spacer 72 is formed using a resin material.
  • the spacer 72 includes a first restricting portion 72A formed in a substantially disk shape.
  • a fitting hole 72B having a hexagonal inner shape and into which the fitting portion 32D of the sleeve 32 is inserted is formed at the center of the first restriction portion 72A.
  • the spacer 72 has six legs 72C protruding from the first restricting portion 72A toward the clutch base 36.
  • the six legs 72C are arranged at equal intervals along the circumferential direction.
  • the six legs 72C are arranged between the plurality of fitting claws 38B of the clutch cover 38, respectively.
  • the tips of the six legs 72C abut on the clutch base 36.
  • the spacer 72 has three connection portions 72D as interposition portions that protrude from the first restriction portion 72A in a direction opposite to the direction in which the leg portions 72C protrude. These three connection portions 72D are arranged at equal intervals along the circumferential direction.
  • the thickness of the three connection portions 72D in the radial direction is set to a thickness that allows elastic deformation in the radial direction when the rotational force of the motor 62 is transmitted to the ratchet 68.
  • the spacer 72 includes second restricting portions 72E that protrude radially outward from ends of the three connecting portions 72D opposite to the first restricting portion 72A.
  • the axial dimension T from the second restricting portion 72E to the first restricting portion 72A is set to be slightly larger than the thickness dimension (dimension in the axial direction) of the ratchet 68.
  • the end face of the second restriction part 72E on the side opposite to the first restriction part 72A is inclined radially inward toward the side opposite to the first restriction part 72A.
  • the spacer 72 includes three crushing ribs 72F that protrude from ends of the three connecting portions 72D opposite to the first limiting portion 72A toward the opposite side to the first limiting portion 72A.
  • the crushing rib 72F is formed in a conical shape that gradually narrows toward the opposite side to the first restricting portion 72A.
  • the fitting portion 32D of the sleeve 32 is inserted into a fitting hole 72B formed at the center of the first restriction portion 72A of the spacer 72.
  • the fitting portion 32D of the sleeve 32 is inserted into the fitting hole 68B formed at the center of the ratchet 68 together with the spacer 72.
  • the connecting portion 72D of the spacer 72 is deformed radially inward.
  • the portion of the spacer 72 including the second restriction portion 72E is reduced in diameter.
  • a gap 74 is formed between the fitting part 32 ⁇ / b> D of the sleeve 32 and the ratchet 68 by the connecting part 72 ⁇ / b> D of the spacer 72.
  • the webbing is pulled out from the spool 14 so that the webbing is attached to the body of the occupant of the vehicle.
  • the control device determines whether there is a high possibility that the vehicle will collide, based on signals from various sensors provided in the vehicle. Then, when the control device determines that there is a high possibility that the vehicle will collide, the control device rotates the motor 62. When the rotational force of the motor 62 is transmitted to the ratchet engaging piece 70 (see FIG. 5), the ratchet engaging piece 70 is displaced toward the ratchet 68 and engages with the ratchet teeth 68A of the ratchet 68.
  • the torque of the motor 62 is transmitted to the ratchet 68, and the torque transmitted to the ratchet 68 is transmitted to the spool 14 via the sleeve 32 and the sub-torsion shaft 30.
  • the spool 14 is rotated in the winding direction, and the webbing is wound on the spool 14.
  • the motor 62 is stopped, and the engagement between the ratchet engaging piece 70 and the ratchet teeth 68A of the ratchet 68 is released.
  • the occupant's body pulls the webbing with a larger force, and the turning force of the spool 14 in the pulling-out direction based on this pulling force causes the main torsion shaft 28 to twist. If the load (deformation resistance load) is exceeded, the force limiter mechanism 16 is operated, and the torsion (deformation) of the main torsion shaft 28 allows the spool 14 to rotate in the pull-out direction at a force greater than the force limiter load.
  • the spool 14 is rotated in the pulling-out direction by the torsion of the main torsion shaft 28, and the webbing is drawn from the spool 14, so that the load (burden) on the chest of the occupant due to the webbing is reduced. Further, the kinetic energy of the occupant used for pulling the webbing is absorbed by the twist of the main torsion shaft 28.
  • control device determines whether or not the occupant's physique is equal to or greater than a predetermined reference value based on a signal from the physique detection means, and based on a signal from the collision detection means. It is determined whether or not has collided.
  • the control device determines that the occupant's physique is equal to or larger than the predetermined reference value, the gas generator 50 of the switching mechanism 22 is not operated, and the engaging portion 56C of the pawl 56 It is engaged with the portion 58B. Therefore, the rotation of the lock ring 58 in the pull-out direction is locked (prevented), so that the rotation of the first clutch 20 in the pull-out direction is blocked.
  • the load (load) on the occupant's chest due to the webbing is reduced by rotating the spool 14 in the pulling-out direction and pulling out the webbing from the spool 14 due to the twist of the main torsion shaft 28 and the sub-torsion shaft 30.
  • the kinetic energy of the occupant used for pulling the webbing is absorbed by the torsion of the main torsion shaft 28 and the sub torsion shaft 30.
  • the control device determines that the occupant's physique is less than a predetermined reference value based on the signal from the physique detection means, and determines that the vehicle has collided based on the signal of the collision detection means.
  • the gas generator 50 is operated under the control of the control device.
  • the piston 54 presses the arm portion 56B of the pawl 56 by the movement of the piston 54.
  • the pawl 56 rotates about the shaft 56A, and the engagement between the engaging portion 56C of the pawl 56 and the notch 58B of the lock ring 58 is released.
  • the rotation of the lock ring 58 in the pulling-out direction is allowed, and the first clutch 20 and the sub-torsion shaft 30 are allowed to rotate in the pulling-out direction together with the spool 14. Therefore, the torsion of the sub-torsion shaft 30 does not occur, and the torsion (deformation) of the main torsion shaft 28 causes the rotation of the spool 14 in the pull-out direction at a force limiter load (the torsional load of the main torsion shaft 28) or more. Permissible.
  • the rotation of the sub-torsion shaft 30 in the pull-out direction is not allowed by the operation of the switching mechanism 22, so that the force limiter load is reduced by the torsion resistance of the main torsion shaft 28.
  • the load value of the force limiter load is set to a high load by summing the load and the torsional load of the sub-torsion shaft 30.
  • the rotation of the sub-torsion shaft 30 in the pulling-out direction is allowed by the operation of the switching mechanism 22, and the force limiter load is reduced.
  • the load value of the force limiter load is adjusted according to the physique of the occupant, and the load (burden) on the occupant's chest due to the webbing can be reduced to appropriately protect the occupant.
  • the ratchet 68 is engaged with the sleeve 32 of the first clutch 20 via the spacer 72.
  • the clearance between the ratchet 68 and the clutch cover 38 of the first clutch 20 is ensured by the leg 72C of the spacer 72, and the movement of the ratchet 68 toward the clutch cover 38 is restricted by the first restriction of the spacer 72.
  • Portion 72A Accordingly, it is possible to suppress the influence on the operation of the first clutch 20 due to the interference of the ratchet 68 with the clutch cover 38 and the clutch plate 40 (the rotation shaft 40C).
  • the movement of the ratchet 68 to the side opposite to the clutch cover 38 is restricted by the second restricting portion 72E of the spacer 72. Accordingly, it is possible to prevent the ratchet 68 from coming off the spacer 72, that is, to prevent the spacer 72 from coming off from the ratchet 68.
  • the fitting portion 32D of the sleeve 32 is connected by the connecting portion 72D of the spacer 72.
  • a gap 74 is formed between the armature and the ratchet 68.
  • the connecting portion 72D of the spacer 72 has a diameter. Deforms inward in the direction. Thereby, the ratchet 68 comes into contact with the fitting portion 32 ⁇ / b> D of the sleeve 32. Thereby, the rotational force of the ratchet 68 can be transmitted directly to the sleeve 32. As a result, it is not necessary to give the spacer 72 a strength corresponding to the rotational force of the ratchet 68, and the weight of the spacer 72 can be reduced.
  • the present invention is not limited to this. That is, the contact of the ratchet 68 with a portion of the first clutch 20 that may hinder the operation of the first clutch 20 may be suppressed by the spacer 72.
  • the first clutch 20 to which the rotational force of the spool 14 is transmitted by operating the switching mechanism 22 and the rotational force to the spool 14 by operating the pre-crash safety mechanism 24 is not limited to this.
  • a spacer may be provided between one clutch in which the rotational force is transmitted to the spool 14 when activated, and another clutch in which the rotational force of the spool 14 is transmitted when activated.

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

Abstract

L'invention concerne un dispositif d'enroulement de sangle comprenant : une bobine sur laquelle est enroulée une sangle ; un premier embrayage pour amener une force de rotation à être transmise à la bobine ou amener une force de rotation à être transmise à partir de la bobine, par l'actionnement du premier embrayage ; un second embrayage pour amener une force de rotation à être transmise à la bobine ou amener une force de rotation à être transmise à partir de la bobine, par l'actionnement du second embrayage, le second embrayage étant disposé de manière adjacente au premier embrayage ; et un élément d'espacement pour supprimer l'effet d'interférence de l'un parmi le premier embrayage et le second embrayage lors de l'actionnement de l'autre parmi le premier embrayage et le second embrayage, l'élément d'espacement étant disposé entre le premier embrayage et le second embrayage.
PCT/JP2019/027582 2018-08-08 2019-07-11 Dispositif d'enroulement de sangle WO2020031609A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018-149132 2018-08-08
JP2018149132A JP7201158B2 (ja) 2018-08-08 2018-08-08 ウェビング巻取装置

Publications (1)

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WO2020031609A1 true WO2020031609A1 (fr) 2020-02-13

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PCT/JP2019/027582 WO2020031609A1 (fr) 2018-08-08 2019-07-11 Dispositif d'enroulement de sangle

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WO (1) WO2020031609A1 (fr)

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JPS6099742A (ja) * 1983-11-01 1985-06-03 Nippon Soken Inc シ−トベルト引締め装置
JP2005170123A (ja) * 2003-12-09 2005-06-30 Mitsubishi Motors Corp シートベルト装置
JP2011230558A (ja) * 2010-04-23 2011-11-17 Takata Corp シートベルトリトラクタ及びシートベルト装置
JP2016164057A (ja) * 2015-03-06 2016-09-08 株式会社東海理化電機製作所 ウェビング巻取装置
JP2017043159A (ja) * 2015-08-25 2017-03-02 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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