Abstract: In a webbing take-up device 10, a worm gear 34, which is connected to a motor 44, engages with a gear wheel 32, and when the worm gear 34 rotates, driving force is transmitted via the gear wheel 32 and a clutch 26, whereby a take-up shaft 20 is rotated in a take-up direction. Helix angles of teeth of the worm gear 34 and the gear wheel 32 are set so that thrust force generated at this time along the axial direction of the gear wheel 32 faces a leg plate 16 fixed side of a case 30. Accordingly, because the thrust force acts on the leg plate 16 fixed side of the case 30, i.e., on a frame 12, there is no need to provide the case 30 or a cover clutch 31 with high strength and rigidity.

Abstract: An operating load of an overload releasing mechanism is made to be high by a simple method. In a webbing retractor, spring claws engage with recesses of a rotor, and a gear wheel and the rotor are connected. When relative rotational force is applied between the rotor and the gear wheel, the spring claws elastically deform and engagement thereof with the recesses is released. Due thereto, connection of the rotor and the gear wheel is released, and the overload releasing mechanism is operated. Here, urging members urge the spring claws toward a side of engaging with the recesses. Due thereto, the operating load of the overload releasing mechanism can be made to be high by a simple method of merely adding the urging members.

Abstract: To obtain a webbing take-up device that can not only transmit to a take-up shaft only rotation from a motor by a clutch but is also simple and compact. A clutch of this webbing take-up device has a simply configuration where sliders 144 of a clutch body portion 114 are caused by frictional force to be retained in a case, whereby the sliders 144 and lock bars 154 are caused to relatively move and the lock bars 154 are caused by this relative movement to move to positions where they engage with or disengage from a ratchet 134. Consequently, the overall configuration of a clutch 100 can be made significantly compact (thinned) in comparison to a configuration that causes a pawl to move using an inertial disk that is large and has weight as in a conventional clutch. Thus, the overall configuration of a webbing take-up device 10 can be made compact.

Abstract: To obtain a webbing take-up device that can not only transmit to a take-up shaft only rotation from a motor by a clutch but is also simple and compact. A clutch of this webbing take-up device has a simply configuration where sliders 144 of a clutch body portion 114 are caused by frictional force to be retained in a case, whereby the sliders 144 and lock bars 154 are caused to relatively move and the lock bars 154 are caused by this relative movement to move to positions where they engage with or disengage from a ratchet 134. Consequently, the overall configuration of a clutch 100 can be made significantly compact (thinned) in comparison to a configuration that causes a pawl to move using an inertial disk that is large and has weight as in a conventional clutch. Thus, the overall configuration of a webbing take-up device 10 can be made compact.

Abstract: To obtain a webbing take-up device that can not only transmit to a take-up shaft only rotation from a motor by a clutch but is also simple and compact. A clutch of this webbing take-up device has a simply configuration where sliders 144 of a clutch body portion 114 are caused by frictional force to be retained in a case, whereby the sliders 144 and lock bars 154 are caused to relatively move and the lock bars 154 are caused by this relative movement to move to positions where they engage with or disengage from a ratchet 134. Consequently, the overall configuration of a clutch 100 can be made significantly compact (thinned) in comparison to a configuration that causes a pawl to move using an inertial disk that is large and has weight as in a conventional clutch. Thus, the overall configuration of a webbing take-up device 10 can be made compact.

Abstract: A motor-driven seatbelt apparatus which enables easy re-restraining of a webbing even when an occupant releases the webbing temporarily from a restrained state. A control device senses the vehicle velocity with a vehicle-velocity sensor. When the vehicle velocity is a predetermined value or lower, the control device drives a motor to rotate a winding shaft, so that the webbing is wound into a completely wound state. When the vehicle is traveling at a vehicle velocity exceeding the predetermined value, the storing and winding operation of the winding shaft by the control device or the motor is not performed. Therefore, the occupant who temporarily released the webbing and finished an action such as to take out a small article in the cabin can re-restrain the webbing immediately thereafter.

Abstract: A webbing take-up device (10, 100) is disclosed, wherein a motor (44) is provided directly below a take-up shaft (20) between a pair of leg plates (16, 18) with a rotary shaft (50) of the motor (44) disposed perpendicularly to the take-up shaft (20), and a clutch (26) is provided at one side of one leg plate (16). Further, a gear (76) of a motor gear portion (46) is removably connected to a worm gear (34) in a clutch gear portion (28), and a mounting stay (84) is detachably attached to a case (30) with screws (86), so that the motor (44) and the motor gear portion (46) can be detached independently of the case (30) while still being assembled together. Still further, a pretensioner mechanism (156) and a sensor mechanism (182) are provided at one end side of a spool (118), and an urging mechanism (136) is disposed at the other end side thereof.

Abstract: A motor retractor, comprising: a winding shaft which winds up a webbing for restraining a vehicle passenger; a motor which rotates the winding shaft in a webbing winding-up direction; and a control portion which, after release of the webbing wearing state of the passenger: drives the motor to cause the webbing to be wound up around the winding shaft; stops the motor when an overload on the motor is detected during the winding-up; redrives the motor after a predetermined time having elapsed after the motor is stopped due to detection of the overland, and adjusts, at the time of the redriving, a driving state of the motor according to the time of driving the motor that has elapsed before the overload detection, is provided.

Abstract: A clutch 100 of the present webbing retractor has a gear wheel 116 and spring claws 182, and has peripheral direction load receiving portions 120 at the gear wheel 116, and load from the spring claws 182 is applied along a peripheral direction via the peripheral direction load receiving portions 120. Therefore, compactness and weight reduction of the clutch 100 can be aimed for. Further, the clutch 100 has a ring 176, and the ring 176 integrally has a cover portion 178 holding respective clutch structural members at predetermined assembly positions, and the spring claws 182, and is held integrally with a rotor 124 by elastic forces of the spring claws 182. In this way, the respective clutch structural members can be temporarily held (sub-assembled) integrally.

Abstract: A webbing retractor for an elongated, strip-shaped webbing belt used for application to a body of a vehicle occupant riding in a vehicle. The webbing retractor has: a frame in which a pair of leg plates, which are disposed so as to face one another, are connected by a back plate so as to be integral; a spool which is disposed between the pair of leg plates, one end of the webbing belt being anchored to the spool; a driving mechanism which is disposed between the pair of leg plates and has an output shaft and which is for rotating the spool in at least a take-up direction; and a clutch disposed between the pair of leg plates, transmitting rotation of the output shaft to the spool. Because a motor and gears can be disposed between the leg plates of the frame, the webbing retractor can be made compact.

Abstract: In a webbing take-up device 10, a worm gear 34, which is connected to a motor 44, engages with a gear wheel 32, and when the worm gear 34 rotates, driving force is transmitted via the gear wheel 32 and a clutch 26, whereby a take-up shaft 20 is rotated in a take-up direction. Helix angles of teeth of the worm gear 34 and the gear wheel 32 are set so that thrust force generated at this time along the axial direction of the gear wheel 32 faces a leg plate 16 fixed side of a case 30. Accordingly, because the thrust force acts on the leg plate 16 fixed side of the case 30, i.e., on a frame 12, there is no need to provide the case 30 or a cover clutch 31 with high strength and rigidity.

Abstract: [Problem] To obtain a webbing take-up device that can not only transmit to a take-up shaft only rotation from a motor by a clutch but is also simple and compact. [Solution] A clutch of this webbing take-up device has a simply configuration where sliders 144 of a clutch body portion 114 are caused by frictional force to be retained in a case, whereby the sliders 144 and lock bars 154 are caused to relatively move and the lock bars 154 are caused by this relative movement to move to positions where they engage with or disengage from a ratchet 134. Consequently, the overall configuration of a clutch 100 can be made significantly compact (thinned) in comparison to a configuration that causes a pawl to move using an inertial disk that is large and has weight as in a conventional clutch. Thus, the overall configuration of a webbing take-up device 10 can be made compact.

Abstract: A webbing retractor 10 has a structure in which a housing 48, to which a motor 44 is attached, faces in an axial direction of a worm gear 34, and is assembled and fixed to an end face of a case 30 which is orthogonal to a direction of thickness of the case 30, in which a clutch 26 which is attached in a joined state to a side face of one leg plate 16 is accommodated, and at an opposite side from a back plate 14. Moreover, this is a structure in which a rotation shaft of the motor 44 is between the leg plate 16 and a leg plate 18 in a state of being orthogonal to a winding shaft 20, and the motor 44 is disposed directly below the winding shaft 20.

Abstract: A clutch 100 of the present webbing retractor has a gear wheel 116 and spring claws 182, and has peripheral direction load receiving portions 120 at the gear wheel 116, and load from the spring claws 182 is applied along a peripheral direction via the peripheral direction load receiving portions 120. Therefore, compactness and weight reduction of the clutch 100 can be aimed for. Further, the clutch 100 has a ring 176, and the ring 176 integrally has a cover portion 178 holding respective clutch structural members at predetermined assembly positions, and the spring claws 182, and is held integrally with a rotor 124 by elastic forces of the spring claws 182. In this way, the respective clutch structural members can be temporarily held (sub-assembled) integrally.

Abstract: A webbing take-up device (10, 100) is disclosed, wherein a motor (44) is provided directly below a take-up shaft (20) between a pair of leg plates (16, 18) with a rotary shaft (50) of the motor (44) disposed perpendicularly to the take-up shaft (20), and a clutch (26) is provided at one side of one leg plate (16). Further, a gear (76) of a motor gear portion (46) is removably connected to a worm gear (34) in a clutch gear portion (28), and a mounting stay (84) is detachably attached to a case (30) with screws (86), so that the motor (44) and the motor gear portion (46) can be detached independently of the case (30) while still being assembled together. Still further, a pretensioner mechanism (156) and a sensor mechanism (182) are provided at one end side of a spool (118), and an urging mechanism (136) is disposed at the other end side thereof.

Abstract: A webbing retractor which allows one-way transmission of rotation from a motor by using a clutch, as well as achieving improved operation of pulling-out and taking-up of the webbing in ordinary use. In the clutch 100 of the present webbing retractor, a clutch main body 114 is not supported by a spool 20, but by a case (a clutch case 101 and a clutch cover 102) with a spindle 133 provided at an accommodating portion 132 of a rotor 124 at one side in an axial direction the spindle 133 being rotatably supported in a round hole 135 of the clutch cover 102 via a rotation support portion 175 of a holder 170, and with the accommodating portion 132 at the other side in the axial direction being rotatably supported by the clutch case 101 via a busing 112.

Abstract: A motor-driven seatbelt apparatus which enables easy re-restraining of a webbing even when an occupant releases the webbing temporarily from a restrained state. A control device senses the vehicle velocity with a vehicle-velocity sensor. When the vehicle velocity is a predetermined value or lower, the control device drives a motor to rotate a winding shaft, so that the webbing is wound into a completely wound state. When the vehicle is traveling at a vehicle velocity exceeding the predetermined value, the storing and winding operation of the winding shaft by the control device or the motor is not performed. Therefore, the occupant who temporarily released the webbing and finished an action such as to take out a small article in the cabin can re-restrain the webbing immediately thereafter.

Abstract: A motor retractor, comprising: a winding shaft which winds up a webbing for restraining a vehicle passenger; a motor which rotates the winding shaft in a webbing winding-up direction; and a control portion which, after release of the webbing wearing state of the passenger: drives the motor to cause the webbing to be wound up around the winding shaft; stops the motor when an overload on the motor is detected during the winding-up; redrives the motor after a predetermined time having elapsed after the motor is stopped due to detection of the overland, and adjusts, at the time of the redriving, a driving state of the motor according to the time of driving the motor that has elapsed before the overload detection, is provided.

Abstract: A webbing retractor for an elongated, strip-shaped webbing belt used for application to a body of a vehicle occupant riding in a vehicle. The webbing retractor has: a frame in which a pair of leg plates, which are disposed so as to face one another, are connected by a back plate so as to be integral; a spool which is disposed between the pair of leg plates, one end of the webbing belt being anchored to the spool; a driving mechanism which is disposed between the pair of leg plates and has an output shaft and which is for rotating the spool in at least a take-up direction; and a clutch disposed between the pair of leg plates, transmitting rotation of the output shaft to the spool. Because a motor and gears can be disposed between the leg plates of the frame, the webbing retractor can be made compact.