WO2014087721A1 - ウェビング巻取装置 - Google Patents
ウェビング巻取装置 Download PDFInfo
- Publication number
- WO2014087721A1 WO2014087721A1 PCT/JP2013/076156 JP2013076156W WO2014087721A1 WO 2014087721 A1 WO2014087721 A1 WO 2014087721A1 JP 2013076156 W JP2013076156 W JP 2013076156W WO 2014087721 A1 WO2014087721 A1 WO 2014087721A1
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- WO
- WIPO (PCT)
- Prior art keywords
- cylinder
- axial direction
- piston
- webbing take
- bent portion
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H18/00—Winding webs
- B65H18/08—Web-winding mechanisms
- B65H18/14—Mechanisms in which power is applied to web roll, e.g. to effect continuous advancement of web
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R22/00—Safety belts or body harnesses in vehicles
- B60R22/34—Belt retractors, e.g. reels
- B60R22/46—Reels with means to tension the belt in an emergency by forced winding up
- B60R22/4628—Reels with means to tension the belt in an emergency by forced winding up characterised by fluid actuators, e.g. pyrotechnic gas generators
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R22/00—Safety belts or body harnesses in vehicles
- B60R22/34—Belt retractors, e.g. reels
- B60R22/46—Reels with means to tension the belt in an emergency by forced winding up
- B60R22/4628—Reels with means to tension the belt in an emergency by forced winding up characterised by fluid actuators, e.g. pyrotechnic gas generators
- B60R2022/4642—Reels with means to tension the belt in an emergency by forced winding up characterised by fluid actuators, e.g. pyrotechnic gas generators the gas directly propelling a flexible driving means, e.g. a plurality of successive masses, in a tubular chamber
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R22/00—Safety belts or body harnesses in vehicles
- B60R22/34—Belt retractors, e.g. reels
- B60R22/46—Reels with means to tension the belt in an emergency by forced winding up
- 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 webbing take-up device including a pretensioner device that forcibly winds a webbing around a spool.
- Some webbing take-up devices equipped with a pretensioner device are made of a deformable material such as a piston or a force transmission element.
- a cylinder such as a guide portion is bent halfway. Or, even if it is curved, the moving member can be deformed following the bent or curved portion of the cylinder (see DE 102006031359 as an example).
- the moving member is inserted from one end of the cylinder and disposed at a predetermined position in the cylinder.
- the moving member passes through the bent portion or the curved portion of the cylinder during the movement, the moving member is Deformed. Such deformation of the moving member becomes resistance to movement of the moving member.
- the object of the present invention is to obtain a webbing take-up device in which a moving member can be easily inserted into a cylinder in consideration of the above facts.
- a spool for taking up the webbing by rotating in the take-up direction, and a plurality of bent portions are set in the intermediate portion in the axial direction, and the axial direction is changed by the bent portions.
- a hollow cylindrical cylinder having flexibility, and being arranged side by side in the axial direction in the cylinder, and the length in the axial direction is inserted into the cylinder and then placed in the arrangement position.
- a plurality of moving members that are shorter than the length from the first bent portion to the last bent portion that pass through until reaching the last bent portion, and are provided at the base end portion of the cylinder, supplying gas to the cylinder, Gas generating means for rotating the spool in the winding direction by moving the plurality of moving members toward the tip of the cylinder by gas pressure.
- the plurality of moving members are arranged side by side in the axial direction of the cylinder within the cylinder.
- Gas generating means is provided at the base end of the cylinder, and gas is supplied into the cylinder when the gas generating means is activated.
- the moving member is moved to the tip side of the cylinder by the pressure of the gas.
- the spool is rotated in the winding direction, and the webbing is wound on the spool from the longitudinal base end side.
- a plurality of bent portions are set in the cylinder, and the axial direction of the cylinder is changed by the bent portions.
- the length of each moving member in the axial direction is shorter than the length from the first bent portion to the last bent portion that passes between the moving member and the arrangement position. For this reason, the moving member does not reach the at least one bent portion until it is inserted from the end of the cylinder and disposed at the arrangement position. For this reason, it is possible to reduce the resistance generated in the moving member after the moving member is inserted into the cylinder and to reach the arrangement position, and it becomes easy to insert the moving member into the cylinder.
- a webbing take-up device is the webbing take-up device according to the first aspect of the present invention, wherein the length in the axial direction of each of the plurality of moving members is arranged after being inserted into the cylinder. Among the bent portions that pass until reaching the position, the distance is set shorter than the interval between the adjacent bent portions that are closest in the axial direction.
- the distance between the adjacent bent parts that are closest in the axial direction is set short. For this reason, the moving member does not straddle two or more bent portions after it is inserted into the cylinder until it reaches the arrangement position. For this reason, it is possible to reduce the resistance generated in the moving member after the moving member is inserted into the cylinder and to reach the arrangement position, and it becomes easy to insert the moving member into the cylinder.
- the webbing take-up device is the webbing take-up device according to the second aspect of the present invention, wherein the length of each of the plurality of moving members in the axial direction is at both ends of the cylinder in the axial direction. It is set shorter than the space
- the length of the moving member in the axial direction is shorter than the distance between the adjacent bent portions closest to each other in the axial direction of the cylinder between both ends in the axial direction of the cylinder. For this reason, the moving member does not straddle two or more bent portions after it is inserted into the cylinder until it reaches the arrangement position. And since the length of each moving member can be set equally, the order of the moving member inserted in a cylinder is not limited, For this reason, the workability
- a webbing take-up device includes a spool for taking up a webbing by rotating in the take-up direction, a hollow cylindrical cylinder in which a bending portion is set and an axial direction is changed by the bending portion.
- a plurality of moving members that are flexible, have a length in the axial direction shorter than the length in the axial direction of the bent portion, and are arranged side by side in the axial direction within the cylinder; and a base of the cylinder
- a gas generating means provided at an end, for supplying gas to the cylinder, moving the plurality of moving members toward the tip of the cylinder by the pressure of the gas, and rotating the spool in the winding direction; It has.
- the plurality of moving members are arranged in the cylinder in the axial direction.
- Gas generating means is provided at the base end of the cylinder.
- gas is supplied to the inside of the cylinder.
- the moving member is moved to the tip side of the cylinder by the pressure of the gas.
- the spool is rotated in the winding direction, and the webbing is wound on the spool from the longitudinal base end side.
- a bending part is set in the cylinder, and the axial direction of the cylinder is changed by the bending part. Since the length in the axial direction of each moving member is shorter than the length in the axial direction of the bent portion, the moving member is less deformed when passing through the bent portion. For this reason, it is possible to reduce the resistance generated in the moving member after the moving member is inserted into the cylinder and to reach the arrangement position, and it becomes easy to insert the moving member into the cylinder.
- the webbing take-up device is the webbing take-up device according to the fourth aspect of the present invention, wherein the moving member disposed in the bending portion of the cylinder has the length in the axial direction bent.
- the end surface is shortened toward the center of curvature of the portion, and the end surface is a slope with respect to the direction perpendicular to the axis of the moving member in a natural state.
- the length in the axial direction of the moving member arranged at the bending portion of the cylinder becomes shorter toward the center of curvature of the bending portion.
- the end surface of the moving member arranged at the bending portion of the cylinder is a slope with respect to the direction perpendicular to the axis of the moving member in a natural state. For this reason, the gap between the end surfaces of the moving members adjacent to each other in the bent portion of the cylinder can be eliminated, or such a gap can be reduced. Accordingly, when the moving member moves with the gas pressure, the moving member does not need to be deformed so as to close the gap between the adjacent moving members, or such deformation becomes small. For this reason, the response from the operation of the gas generating means to the movement of the moving member is improved, and the cylinder can be shortened by the amount that does not require the gap as described above.
- the webbing take-up device is the webbing take-up device according to the fourth aspect of the present invention, wherein the adjacent moving member in the bending portion of the cylinder is located outside the bending portion in the radius direction of curvature. They are spaced apart in the axial direction.
- the adjacent moving members in the bending portion of the cylinder are arranged apart in the axial direction outside the bending radius of the bending portion. For this reason, even if the moving member is deformed by reaching the bent portion, such deformation of the moving member is unlikely to affect the adjacent moving member.
- the webbing take-up device is the webbing take-up device according to the sixth aspect of the present invention, wherein the moving members adjacent in the bending portion of the cylinder are integrally connected by a connecting portion. .
- the adjacent moving members in the bending portion of the cylinder are integrally connected by the connecting portion.
- a gap is formed.
- the plurality of moving members are integrally connected by the connecting portion, insertion into the cylinder is facilitated.
- the webbing take-up device according to the eighth aspect of the present invention is the webbing take-up device according to the seventh aspect of the present invention, wherein the connecting portion is broken when the moving member is disposed in the bent portion.
- the connecting portion is broken when the moving member is disposed in the bending portion. For this reason, the moving member is not easily affected by the connecting portion and other adjacent moving members, and is easily moved in the cylinder.
- the webbing take-up device according to the present invention is easy to insert the moving member into the cylinder.
- FIG. 5 is a side view corresponding to FIG. 4 showing a state in which the moving member has moved and the spool has been rotated in the winding direction. It is an enlarged plan view which shows the moving member of the webbing take-up device according to the second embodiment. It is an enlarged plan view which shows the moving member of the webbing take-up device according to the third embodiment.
- the webbing take-up device 10 includes a frame 12.
- the frame 12 includes a substantially flat back plate 14.
- Leg plates 16 and 18 extend from one end in the width direction of the back plate 14 toward one side in the thickness direction of the back plate 14.
- a spool 20 is provided between the leg plate 16 and the leg plate 18 of the frame 12.
- the spool 20 is supported directly on the leg plates 16 and 18 or indirectly via another member so as to be rotatable around an axis whose axial direction is the opposing direction of the leg plates 16 and 18.
- the longitudinal direction proximal end side of the long belt-like webbing 24 is locked to the spool 20, and when the spool 20 rotates in the winding direction around the central axis, the webbing 24 is moved from the longitudinal direction proximal end side to the spool 20. It is wound up.
- the spool 20 has a hollow shape and is open at both ends in the axial direction. Inside the spool 20, a torsion shaft (not shown) is provided as an energy absorbing part that constitutes a force limiter mechanism. Further, a lock base constituting a lock mechanism is provided on the leg plate 16 side of the spool 20, and the lock base is rotatably inserted into an opening end of the spool 20 on the leg plate 16 side. The torsion shaft is connected in a state in which relative rotation is restricted with respect to the lock base on the leg plate 16 side.
- the lock mechanism includes a sensor that operates when the vehicle suddenly decelerates or when the rotational acceleration of the lock base in the pull-out direction opposite to the winding direction described above exceeds a predetermined magnitude. When the sensor is activated, rotation of the lock base in the pull-out direction is restricted.
- the connecting member 32 is inserted into the opening end of the spool 20 on the leg plate 18 side.
- the connection member 32 is restricted from rotating relative to the spool 20.
- the end of the torsion shaft on the leg plate 18 side is connected to the connecting member 32 in a state where relative rotation with respect to the connecting member 32 is restricted.
- the lock base is restricted from rotating relative to the spool 20 via the torsion shaft, and when the lock mechanism sensor is actuated to restrict the lock base from rotating in the pull-out direction, the spool 20 is pulled out. Rotation in the direction is restricted.
- the webbing take-up device 10 includes a pretensioner device 42.
- the pretensioner device 42 includes a cylinder 44.
- the cylinder 44 includes a general portion 46A.
- the general portion 46A is formed in a tube having a circular cross section with the central axis direction along the thickness direction of the back plate 14, and is near the upper end portion of the leg plate 16 outside the leg plate 16 (on the side opposite to the leg plate 18 of the leg plate 16). It is provided along the leg plate 16.
- a gas generator 48 as a gas generating means is provided at the base end portion (the end portion on the back plate 14 side) of the leg plate 16.
- the gas generator 48 is electrically connected to a control means such as an ECU. When the vehicle suddenly decelerates, the gas generator 48 is operated to supply gas from the base end side of the general portion 46A to the inside of the cylinder 44.
- a bent part 50A is formed continuously from the general part 46A at the tip of the general part 46A.
- the bent portion 50A has an inner diameter dimension substantially equal to the inner diameter dimension of the general portion 46A, and has a tubular shape whose central axis is bent or curved.
- the cylinder 44 is directed to the leg plate 18 side along the width direction of the back plate 14 at the bent portion 50A.
- a general portion 46B is continuously formed on the opposite side of the bent portion 50A from the general portion 46A.
- the general portion 46B has a tubular shape whose central axis is along the width direction of the leg plate 18, and the inner diameter dimension thereof is substantially equal to the inner diameter dimension of the general portion 46A.
- the general part 46B is provided on the side of the end of the leg plates 16 and 18 opposite to the back plate 14, and the bent part 50B is continuously formed on the side of the general part 46B opposite to the bent part 50A. Has been.
- the bent portion 50B has an inner diameter dimension substantially equal to the inner diameter dimension of the general portion 46A, and has a tubular shape whose central axis is bent or curved.
- the cylinder 44 is directed at the bent portion 50 ⁇ / b> B in the direction of the central axis in the thickness direction of the back plate 14.
- a general portion 46C is continuously formed on the opposite side of the bent portion 50B from the general portion 46B.
- the general part 46C is formed in a tubular shape whose central axis is along the extending direction of the leg plate 18 from the back plate 14, and the inner diameter dimension thereof is substantially equal to the inner diameter dimension of the general part 46A.
- the general portion 46C is provided along the leg plate 18 in the vicinity of the upper end portion of the leg plate 18 on the outside of the leg plate 18 (on the side opposite to the leg plate 16 of the leg plate 18), and on the opposite side of the bent portion 50B of the general portion 46C.
- the bent portion 50C is continuously formed.
- the bent part 50C has an inner diameter dimension substantially equal to the inner diameter dimension of the general part 46A, and has a bent or curved tubular central axis.
- the central axis direction of the cylinder 44 is directed to the substantially central side of the leg plate 18 (that is, the lower side of the leg plate 18 and the leading end side of the leg plate 18 extending from the back plate 14) at the bent portion 50C.
- a general portion 46D is continuously formed on the opposite side of the bent portion 50C from the general portion 46C.
- the general portion 46D is formed in a tubular shape whose central axis is below the leg plate 18 and toward the distal end side in the extending direction of the leg plate 18 from the back plate 14, and its inner diameter is substantially equal to the inner diameter of the general portion 46A. .
- the tip of the general portion 46D is open.
- a case 52 having an open upper end is provided below the tip of the general portion 46.
- pistons 58A to 58E are provided inside the cylinder 44 that is appropriately bent at the bending portions 50A to 50C.
- Each of the pistons 58A to 58E is formed in a cylindrical shape having an outer diameter dimension substantially equal to the inner diameter dimension of the cylinder 44 by a flexible synthetic resin material such as nylon (PA), polyvinyl chloride (PVC), or elastomer. ing.
- the piston 58A is provided on the most proximal side (that is, the gas generator 48 side) in the cylinder 44.
- the piston 58A has its distal end side approaching the bent portion 50A at the initial arrangement position, and the distal end side of the piston 58A is bent or curved following the bent portion 50A.
- the piston 58B is provided on the side of the tip of the piston 58A. All of the pistons 58B are arranged in the general portion 46B at the initial arrangement position.
- the piston 58C is provided on the side of the tip of the piston 58B.
- the intermediate portion of the piston 58C is located in the bent portion 50B at the initial arrangement position, and the intermediate portion of the piston 58C is bent or curved following the bent portion 50B.
- the piston 58D is provided on the side of the tip of the piston 58C. All of the pistons 58D are arranged in the general portion 46C at the initial arrangement position.
- the piston 58E is provided on the side of the tip of the piston 58D.
- the piston 58E is positioned at the initial position in the general portion 46D, but the proximal end is positioned in the bent portion 50C. For this reason, the base end side of the piston 58E is bent or curved following the bent portion 50C.
- each of the piston 58C and the piston 58D is set to be shorter than the interval from the bent portion 50A to the bent portion 50B. For this reason, even if each of the piston 58C and the piston 58D is inserted from the proximal end portion of the cylinder 44 and moved to the initial arrangement position, the piston 58C and the piston 58D straddle the bending portion 50A and the bending portion 50B. There is no.
- the total length of the piston 58E is set shorter than the shorter one of the interval from the bent portion 50A to the bent portion 50B and the interval from the bent portion 50B to the bent portion 50C. For this reason, the piston 58E does not straddle the bending part 50A and the bending part 50B, nor straddle the bending part 50B and the bending part 50C.
- the piston 58A moves to the tip side of the cylinder 44.
- the piston 58A thus moved presses the piston 58B and moves the piston 58B toward the tip side of the cylinder 44.
- the pistons 58A to 58E are moved in this manner, the pistons 58A to 58E are sequentially removed from the tip of the cylinder 44 and dropped, and are accommodated in the case 52 described above.
- a plurality of rotating teeth 62 are provided on the side of the tip of the cylinder 44.
- the rotating teeth 62 are integrally formed with the connecting member 32 and extend radially from the rotation center side of the connecting member 32 to the outside.
- the piston 58A is operated as described above. Moves to the tip side of the cylinder 44, and the piston 58A presses the piston 58B toward the tip side of the cylinder 44.
- the pistons 58A to 58E move in this way, first, the rotating teeth 62 bite into the piston 58E.
- Rotating teeth 62 are rotated in the winding direction while the rotating teeth 62 sequentially bite from the piston 58E to the piston 58A in this way.
- the rotating teeth 62 are formed on the connecting member 32, and the connecting member 32 is restricted from rotating relative to the spool 20. For this reason, when the rotating tooth 62 rotates in the winding direction, the spool 20 rotates in the winding direction, whereby the webbing 24 is wound around the spool 20. This eliminates the slack (so-called “slack”) of the webbing 24 attached to the occupant's body, and the occupant's body is restrained by the webbing 24 with a stronger force than before.
- slack slack
- each of the pistons 58A to 58E is formed of a flexible synthetic resin material as described above. Therefore, the pistons 58A to 58E can be provided in the cylinder 44 bent or curved by the bent portions 50A to 50C, and the pistons 58A to 58E are moved in the cylinder 44 bent or curved in this way. be able to. Thereby, even if the cylinder 44 is set sufficiently long, it is possible to prevent or suppress the cylinder 44 from greatly protruding to the outside of the frame 12. For this reason, the whole webbing take-up device 10 can be made compact.
- the pistons 58A to 58E are inserted from the base end portion of the cylinder 44, and the total length of each of the piston 58C and the piston 58D is set to be shorter than the interval from the bent portion 50A to the bent portion 50B. . For this reason, even if each of the piston 58C and the piston 58D is inserted from the proximal end portion of the cylinder 44 and moved to the initial arrangement position, the piston 58C and the piston 58D straddle the bending portion 50A and the bending portion 50B. There is no.
- each of the piston 58C and the piston 58D receives from the inner peripheral portion of the cylinder 44 until each of the piston 58C and the piston 58D reaches the initial arrangement position. Therefore, each of the piston 58C and the piston 58D can be easily moved to the initial arrangement position, and the operation of inserting the piston 58C and the piston 58D into the cylinder 44 is facilitated.
- the total length of the piston 58E is set shorter than the shorter one of the interval from the bent portion 50A to the bent portion 50B and the interval from the bent portion 50B to the bent portion 50C. For this reason, the piston 58E does not straddle the bending part 50A and the bending part 50B, nor straddle the bending part 50B and the bending part 50C.
- the entire length of the pistons 58A to 58E may be set to the same length. By configuring in this way, the standards of the pistons 58A to 58E can be unified, and the cost can be reduced.
- the moving member is longer than the interval between the bent portion 50A and the bent portion 50B along the central axis of the cylinder 44 or the interval between the bent portion 50B and the bent portion 50C, and the bent portion 50A along the central axis of the cylinder 44. You may set shorter than the space
- each of the pistons 58A to 58E is not specifically mentioned, but the rigidity of each of the pistons 58A to 58E may be unified or different.
- the central portions of the general portions 46A to 46D in the cylinder 44 are linear, but the radius of curvature is sufficiently larger than that of the bent portions 50A to 50C, and the pistons 58A to 58E pass through the inside thereof.
- the general portions 46A to 46D may be curved as long as they do not receive large resistance.
- the lock mechanism is provided on the opposite side of the frame 12 from the rotation teeth 62, but the lock mechanism may be provided on the same side as the rotation teeth 62 in the frame 12.
- a convex portion 72 having a conical shape or a truncated cone shape protrudes from one of the proximal end portion and the distal end portion of the piston 58 (the distal end portion in FIG. 6).
- a recess 74 is formed on the other of the proximal end and the distal end of the piston 58 (the proximal end in FIG. 6), and the projection 72 of the piston 58 enters the recess 74 of the adjacent piston 58. be able to. If comprised in this way, when the rotation tooth
- the convex portion 72 and the concave portion 74 of the piston 58 are formed in a hemispherical shape, and the convex portion 72 of the piston 58 is adjacent to the piston. 58 can enter the recess 74. Even in this configuration, the same effect as in the second embodiment can be obtained.
- a substantially cylindrical piston 58 is disposed in the bending portion 50 of the cylinder 44.
- the length of the piston 58 arranged in the bent portion 50 in the central axis direction is set to be sufficiently shorter than the length of the bent portion 50 in the central axis direction, and a plurality of pistons 58 can be arranged in the bent portion 50.
- the piston 58 is less deformed in the bent portion 50 or the piston 58 is It does not deform in the bent part 50. For this reason, the piston 58 can be easily disposed in the cylinder 44 having the bent portion 50.
- a piston 102 as a moving member is disposed in the bending portion 50 of the cylinder 44 instead of the piston 58.
- the piston 102 is gradually shortened in the axial direction toward the center of curvature in the bent portion 50, and the end surface of the piston 102 is inclined with respect to the direction perpendicular to the axis of the piston 102 in a natural state.
- the center of curvature P of the bent portion 50 is located on the extended line of the end face of the piston 102.
- the piston 102 When the gas generated by the gas generator 48 (not shown in FIG. 9) is supplied to the cylinder 44, the piston 102 is deformed so as to fill the gap between the adjacent pistons 102 by the gas pressure. Then, the adjacent piston 102 is pressed.
- the piston 102 in the webbing take-up device 100, the piston 102 is gradually shortened in the axial direction toward the center of curvature in the bending portion 50, and the end surface of the piston 102 is in a natural state. It is inclined with respect to the direction perpendicular to the axis, and preferably, the center of curvature P of the bent portion 50 is located on the extended line of the end face of the piston 102.
- the clearance gap between the adjacent pistons 102 becomes small, or the clearance gap between the adjacent pistons 102 disappears. Therefore, the piston 102 has little or no deformation that fills the gap. This speeds up the response from when the gas generator 48 is activated until the piston 102 moves. Further, the length of the cylinder 44 in the direction of the central axis can be shortened by making the gap between adjacent pistons 102 small or not having such a gap.
- adjacent pistons 58 are connected by a connecting portion 112.
- the connecting portion 112 is formed with a sufficiently shorter outer diameter than the piston 58, and the connecting portion 112 is made of the same material as the piston 58.
- the plurality of pistons 58 and the connecting portion 112 are formed by a long member 114 having a circular cross section.
- the outer periphery of the long member 114 is cut at an appropriate position in the intermediate portion in the longitudinal direction (the portion in the range M between the two-dot chain lines L1 and L2 in FIG. 11).
- the cut portion becomes the connecting portion 112 whose outer diameter is shorter than the other portions, and both sides thereof become the pistons 58.
- a gap is formed between the adjacent pistons 58 by the length of the connecting portion 112 outside the radius of curvature of the bent portion 50 in the adjacent pistons 58. For this reason, when the piston 58 is disposed in the bending portion 50, even if the piston 58 is deformed, the adjacent piston 58 is hardly affected.
- the piston 58 is connected to the gas generator 48 (not shown in FIG. 10). It can move smoothly with the pressure of the generated gas.
- the plurality of pistons 58 are integrally connected by the connecting portion 112, the plurality of pistons 58 can be easily inserted into the cylinder 44 to reach the initial arrangement position. .
- the outer peripheral portion of the long member 114 is cut to form the connecting portion 112, and both sides of the connecting portion 112 are the pistons 58.
- the manufacturing method is not particularly limited, such as integrally molding the piston 58 and the connecting portion 112 with a mold, and various manufacturing methods can be applied.
- a cutting tool such as a cutter is attached to the outer periphery of the long member 114, and at least one of the long member 114 and the cutting tool is rotated around the central axis of the long member 114 until the vicinity of the central axis of the long member 114. It is good also as a structure which forms the notch which does not reach
- the central axis portion side of the long member 114 is closer to the connecting portion 112 than the portion where the cut is formed, and both sides of the long member 114 along the longitudinal direction of the long member 114 are connected to the piston 58.
- the shape of the cut may be a streak shape, or may be a triangular shape with a narrower opening width toward the central axis, and the shape of the cut is not particularly limited. .
- the connecting portion 112 is pulled from the piston 58. It is broken by compression or the like. For this reason, when the piston 58 moves with the pressure of the gas generated by the gas generator 48 (not shown in FIG. 10), the piston 58 can move smoothly without being affected by the connecting portion 112.
Abstract
Description
20 スプール
24 ウェビング
44 シリンダ
48 ガスジェネレータ(ガス発生手段)
50 曲げ部
50A 曲げ部
50B 曲げ部
50C 曲げ部
58 ピストン(移動部材)
58A ピストン(移動部材)
58B ピストン(移動部材)
58C ピストン(移動部材)
58D ピストン(移動部材)
58E ピストン(移動部材)
70 ウェビング巻取装置
80 ウェビング巻取装置
90 ウェビング巻取装置
100 ウェビング巻取装置
102 ピストン(移動部材)
110 ウェビング巻取装置
120 ウェビング巻取装置
Claims (8)
- 巻取方向に回転することによってウェビングを巻取るスプールと、
軸線方向中間部に複数の曲げ部が設定され、前記曲げ部により前記軸線方向が変えられた中空筒形状のシリンダと、
可撓性を有し、前記シリンダ内での前記軸線方向に並んで配置されると共に、前記軸線方向の長さが、前記シリンダに挿入されてから配置位置に到達するまでの間に通過する最初の前記曲げ部から最後の前記曲げ部までの長さよりも短い複数の移動部材と、
前記シリンダの基端部に設けられ、前記シリンダにガスを供給し、前記ガスの圧力によって前記複数の移動部材を前記シリンダの先端側へ移動させて、前記スプールを前記巻取方向に回転させるガス発生手段と、
を備えるウェビング巻取装置。 - 前記複数の移動部材の各々の前記軸線方向の長さは、前記シリンダに挿入されてから配置位置に到達するまでの間に通過する前記曲げ部のうち、前記軸線方向に最も近く隣合う前記曲げ部の間隔よりも短く設定された請求項1に記載のウェビング巻取装置。
- 前記複数の移動部材の各々の前記軸線方向の長さは、前記シリンダの前記軸線方向両端の間において前記軸線方向に最も近く隣合う前記曲げ部の間隔よりも短く設定された請求項2に記載のウェビング巻取装置。
- 巻取方向に回転することによってウェビングを巻取るスプールと、
曲げ部が設定され、前記曲げ部により軸線方向が変えられた中空筒形状のシリンダと、
可撓性を有し、前記軸線方向の長さが、前記曲げ部の軸線方向長さよりも短く、前記シリンダ内で前記軸線方向に並んで配置される複数の移動部材と、
前記シリンダの基端部に設けられ、前記シリンダにガスを供給し、前記ガスの圧力によって前記複数の移動部材を前記シリンダの先端側へ移動させて、前記スプールを前記巻取方向に回転させるガス発生手段と、
を備えるウェビング巻取装置。 - 前記シリンダの前記曲げ部に配置される前記移動部材は、前記軸線方向の長さが前記曲げ部の曲率中心側へ向けて短くなると共に端面が自然状態で前記移動部材の軸直角方向に対する斜面とされた請求項4に記載のウェビング巻取装置。
- 前記シリンダの前記曲げ部内で隣合う前記移動部材は、前記曲げ部の曲率半径方向外側で前記軸線方向に離間して配置される請求項4に記載のウェビング巻取装置。
- 前記シリンダの前記曲げ部内で隣合う前記移動部材は、連結部によって一体的に連結された請求項6に記載のウェビング巻取装置。
- 前記連結部は、前記移動部材が前記曲げ部内に配置されることによって破断される請求項7に記載のウェビング巻取装置。
Priority Applications (4)
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JP2014550975A JPWO2014087721A1 (ja) | 2012-12-04 | 2013-09-26 | ウェビング巻取装置 |
DE112013005816.2T DE112013005816T5 (de) | 2012-12-04 | 2013-09-26 | Gurtbandaufnahmevorrichtung |
US14/649,075 US20150298926A1 (en) | 2012-12-04 | 2013-09-26 | Webbing take up device |
CN201380062823.0A CN104853964A (zh) | 2012-12-04 | 2013-09-26 | 安全带卷取装置 |
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JP2012265439 | 2012-12-04 | ||
JP2012-265439 | 2012-12-04 |
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WO2014087721A1 true WO2014087721A1 (ja) | 2014-06-12 |
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PCT/JP2013/076156 WO2014087721A1 (ja) | 2012-12-04 | 2013-09-26 | ウェビング巻取装置 |
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US (1) | US20150298926A1 (ja) |
JP (1) | JPWO2014087721A1 (ja) |
CN (1) | CN104853964A (ja) |
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WO2016021422A1 (ja) * | 2014-08-07 | 2016-02-11 | タカタ株式会社 | プリテンショナ、リトラクタ及びシートベルト装置 |
WO2016047338A1 (ja) * | 2014-09-22 | 2016-03-31 | タカタ株式会社 | プリテンショナ、リトラクタ及びシートベルト装置 |
WO2017069047A1 (ja) * | 2015-10-21 | 2017-04-27 | タカタ株式会社 | シートベルトリトラクタ及びシートベルト装置 |
JP2017100684A (ja) * | 2015-12-04 | 2017-06-08 | 株式会社東海理化電機製作所 | ウェビング巻取装置 |
JP2017100683A (ja) * | 2015-12-04 | 2017-06-08 | 株式会社東海理化電機製作所 | ウェビング巻取装置 |
CN111201164A (zh) * | 2017-10-16 | 2020-05-26 | 株式会社东海理化电机制作所 | 安全带卷取装置 |
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DE102013018722B4 (de) * | 2013-11-08 | 2017-07-13 | Trw Automotive Gmbh | Gurtstraffer für ein Sicherheitsgurtsystem |
WO2019026426A1 (ja) * | 2017-08-03 | 2019-02-07 | 株式会社東海理化電機製作所 | ウェビング巻取装置 |
CN111196243A (zh) * | 2018-11-16 | 2020-05-26 | 延锋汽车智能安全系统有限责任公司 | 活塞、安全带卷收器和预紧式安全带 |
JP7206567B2 (ja) * | 2019-11-01 | 2023-01-18 | 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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- 2013-09-26 WO PCT/JP2013/076156 patent/WO2014087721A1/ja active Application Filing
- 2013-09-26 DE DE112013005816.2T patent/DE112013005816T5/de not_active Withdrawn
- 2013-09-26 US US14/649,075 patent/US20150298926A1/en not_active Abandoned
- 2013-09-26 CN CN201380062823.0A patent/CN104853964A/zh active Pending
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WO2016021422A1 (ja) * | 2014-08-07 | 2016-02-11 | タカタ株式会社 | プリテンショナ、リトラクタ及びシートベルト装置 |
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JP2017100684A (ja) * | 2015-12-04 | 2017-06-08 | 株式会社東海理化電機製作所 | ウェビング巻取装置 |
JP2017100683A (ja) * | 2015-12-04 | 2017-06-08 | 株式会社東海理化電機製作所 | ウェビング巻取装置 |
CN111201164A (zh) * | 2017-10-16 | 2020-05-26 | 株式会社东海理化电机制作所 | 安全带卷取装置 |
CN111201164B (zh) * | 2017-10-16 | 2022-05-03 | 株式会社东海理化电机制作所 | 安全带卷取装置 |
Also Published As
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DE112013005816T5 (de) | 2015-09-24 |
US20150298926A1 (en) | 2015-10-22 |
CN104853964A (zh) | 2015-08-19 |
JPWO2014087721A1 (ja) | 2017-01-05 |
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