WO2003043860A1 - Enrouleur de ceinture de securite - Google Patents

Enrouleur de ceinture de securite Download PDF

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Publication number
WO2003043860A1
WO2003043860A1 PCT/JP2001/010198 JP0110198W WO03043860A1 WO 2003043860 A1 WO2003043860 A1 WO 2003043860A1 JP 0110198 W JP0110198 W JP 0110198W WO 03043860 A1 WO03043860 A1 WO 03043860A1
Authority
WO
WIPO (PCT)
Prior art keywords
spool
load
shaft sensor
webbing
webbing take
Prior art date
Application number
PCT/JP2001/010198
Other languages
English (en)
Japanese (ja)
Inventor
Tomonori Nagata
Shinji Mori
Tetsushi Muromachi
Original Assignee
Kabushiki Kaisha Tokai-Rika-Denki-Seisakusho
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
Priority to JP2000153796A priority Critical patent/JP4278832B2/ja
Application filed by Kabushiki Kaisha Tokai-Rika-Denki-Seisakusho filed Critical Kabushiki Kaisha Tokai-Rika-Denki-Seisakusho
Priority to PCT/JP2001/010198 priority patent/WO2003043860A1/fr
Publication of WO2003043860A1 publication Critical patent/WO2003043860A1/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
    • 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
    • B60R2022/288—Safety belts or body harnesses in vehicles incorporating energy-absorbing devices with means to adjust or regulate the amount of energy to be absorbed
    • 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

Definitions

  • the present invention relates to a webbing take-up device, and more particularly to a webbing take-up device capable of absorbing the webbing while allowing the webbing to be pulled out when the webbing is pulled out.
  • rotation of a spool (winding shaft) in a webbing pull-out direction is locked at the time of sudden deceleration of a vehicle, thereby preventing webbing from being pulled out.
  • the lock mechanism has a structure in which a lock means is arranged near the device frame on one end side of the spool, and when the vehicle is suddenly decelerated, the lock means is actuated to prevent rotation of the spool in the pulling-out direction. It is.
  • a predetermined amount of the webbing is pulled out to absorb energy.
  • this energy absorbing mechanism for example, there is a structure in which a spool and a torsion bar are arranged coaxially with the spool.
  • the I-bar is connected at one end to a spool and at the other end to a shaft sensor connected to a locking means so as not to rotate relative to each other.
  • the spool, shaft and sensor rotate together through the torsion bar.
  • the shaft and sensor are prevented from rotating in the webbing withdrawal direction during rapid deceleration of the vehicle, the spool is pulled by the webbing pulling force.
  • the present invention can change the force limit load at a predetermined timing with a simple structure, and more suitably absorbs the occupant's inertial energy.
  • the purpose is to obtain a webbing take-up device that can do this.
  • the webbing take-up device of the invention according to claim 1 is a cylindrical spool from which webbing is taken out and pulled out, and a shaft provided at one end of the spool so as to be coaxial with and relatively rotatable with the spool.
  • a sensor, and a lock means connected to the sensor for preventing rotation of the shaft in the webbing withdrawal direction when a predetermined acceleration is detected; and a coaxial with the spool in the spool.
  • One end is connected to the spool and the other end is connected to the shaft sensor.
  • the spool and the shaft sensor are rotated integrally, and the shaft
  • the spool In a state where the rotation of the sensor in the webbing withdrawal direction is prevented, the spool is moved in the webbing withdrawal direction with respect to the shaft sensor.
  • a webbing take-up device comprising: a bar member to be rotated with respect to the shaft; and a webbing take-up device comprising: a shaft member; In a state in which the rotation of the spool relative to the shaft sensor reaches a predetermined amount in a state where the rotation of the spool relative to the shaft sensor has stopped in a state where the rotation of the shaft sensor is prevented, a load application means is provided for applying a load against the relative rotation.
  • the webbing take-up device according to the invention according to claim 6 is the webbing take-up device according to claim 1, wherein the load applying means includes a portion provided on the shaft sensor and a portion provided on the spool. And cooperating with each other.
  • the spool and the shaft sensor are connected to each other via a bar member, preferably a torsion bar.
  • the webbing can be freely taken up and pulled out.
  • the locking means is activated, and the rotation of the shaft sensor in the webbing withdrawing direction is prevented.
  • the webbing pulling force acts as a rotational force in the webbing pull-out direction on the chamber via the spool.
  • the torsion bar is twisted, and the spool is rotated in the egress pulling direction with respect to the shaft sensor while the load acting on the webbing (occupant) is kept constant (while a constant force limit load is applied).
  • the webbing is withdrawn and the torsion bar absorbs energy.
  • the load applying means applies a load against the relative rotation only until the relative rotation of the spool reaches a predetermined amount. Therefore, in addition to the torsional load of the above-mentioned torsion bar, the load by the load applying means acts on the ebbing (occupant) as a force-limited load. That is, a force limiter load larger than the force limiter load obtained only by the torsional load of the torsion bar can be obtained, and a proper energy absorption can be achieved by holding down the evacuation withdrawal speed (spool rotation speed).
  • the relative rotation of the spool with respect to the shaft sensor reaches a predetermined amount
  • the application of the load by the load applying means is released. Therefore, only the torsional load of the torsion bar described above acts on the webbing (occupant) as a force limiter load.
  • the force-limited load is smaller than the force-limited load at the beginning of the sudden deceleration of the vehicle (before the relative rotation of the spool reaches the predetermined amount).
  • the force limiter load can be changed at a predetermined timing. That is, in the initial stage of vehicle rapid deceleration, a load is applied by the load applying means to increase the amount of energy absorbed per hour to suppress the amount of webbing withdrawn (the amount of movement of the occupant). Since the load on the occupant can be reduced by reducing the amount of energy absorbed per hit, the webbing take-up device according to claim 1 has desirable characteristics. In particular, in vehicles equipped with an airbag device, by reducing the force limiter load immediately before contact between the airbag and the occupant, the load acting on the occupant can be reduced, further reducing the possibility of occupant injury. be able to. Also, in vehicles without an airbag device, the force applied to the occupant should be reduced by reducing the force-limit load immediately before the occupant comes into contact with the vehicle interior, such as the steering wheel instrument panel (dashboard). And reduce the possibility of occupant injury.
  • the force limit load can be changed at a predetermined timing with a simple structure, and the inertia energy of the occupant is more appropriately absorbed. can do.
  • the webbing take-up device is the webbing take-up device according to claim 1, wherein the load applying means is provided on the shaft sensor, and a relative rotation direction of the spool with respect to the shaft sensor. And a pin member housed in the groove while being locked to the spool.
  • the webbing retractor according to claim 7 is the webbing retractor according to claim 2, wherein in the normal state, the pin member is housed in a deep portion in the groove, and the shaft of the spool is provided. '' When rotating relative to the sensor, The member is characterized in that the member relatively moves while deforming on the groove formed gradually shallower.
  • the pin member for example, the pin slotted together with the spool. It is rotated and moves in the groove provided in the shaft sensor. Since the groove is formed to be gradually shallower in the relative rotation direction of the spool, the pin / mouth is moved while being deformed, thereby applying a load against the relative rotation of the spool.
  • the load due to the deformation of the pin / sted ted acts on the webbing (occupant) as a force limiter load. That is, a force limiter load larger than the force limiter load obtained only by the torsional load of the torsion bar can be obtained, and the appropriate energy absorption can be achieved by holding down the webbing withdrawal speed (spool rotation speed).
  • the force limiter load is smaller than the force limiter load in the initial stage of the vehicle sudden deceleration (before the relative rotation of the spool reaches the predetermined amount).
  • the force limit load can be changed at a predetermined timing with a simple structure, and the inertia energy of the occupant is more appropriately absorbed. can do.
  • the webbing take-up device is the webbing take-up device according to claim 1, wherein the load applying means includes a protrusion provided on one of the shaft sensor and the spool; and the shaft. A shear portion provided on one of the sensor and the other of the spool and configured to shear with a predetermined load.
  • the webbing take-up device of the invention according to claim 8 is a webbing take-up device according to claim 3.
  • the protrusion is provided on the shaft sensor
  • the shear portion is provided on the spool
  • the shear portion engages with the protrusion when the spool rotates relative to the shaft sensor. Are provided so as to be sheared together.
  • the projection provided on the shaft sensor is connected to the spool. And is sheared by the rotation of the spool to apply a load against the relative rotation of the spool. Therefore, in addition to the torsional load of the torsion bar described above, the load due to the shearing of the shear portion acts on the webbing (occupant) as a force limiter load. That is, a force limiter load larger than the force limiter load obtained only by the torsional load of the torsion bar is obtained, and the webbing withdrawal speed (spool rotation speed) is kept low to achieve appropriate energy absorption.
  • the force-limited load is smaller than the force-limited load at the initial stage of the rapid deceleration of the vehicle (before the relative rotation of the spool reaches the predetermined amount).
  • the force-limited load can be changed at a predetermined timing by a simple structure, and the inertia energy of the occupant can be more suitably absorbed.
  • a webbing take-up device is the webbing take-up device according to the first aspect, wherein the load applying means is bridged between the shaft sensor and the spool and moved into the spool. It is characterized by being constituted by wires inserted and placed as possible.
  • the webbing take-up device is the webbing take-up device according to the fourth aspect, wherein one end of the wire is provided with a hole formed in the spool. The other end of the wire is locked to the shaft sensor.
  • the wire described in claim 4 includes a rod-shaped member that does not easily deform (for example, does not deform under its own weight or human power).
  • the wire is moved along with the rotation of the spool.
  • the spool is squeezed at the outlet (the outlet of the hole formed in the spool), and the spool rotates while being wound on the side of the spool.
  • the ironing load of the wire acts on the webbing (occupant) as a force limiter load.
  • a force limiter load larger than the force limit load obtained only by the torsional load of the torsion bar is obtained, and appropriate energy absorption is achieved by holding down the webbing withdrawal speed (spool rotation speed).
  • the spool rotates a predetermined amount with respect to the shaft sensor, all the wires wound between the shaft-sensor and the spool come out of the spool (whole amount is wound up), and a load is applied by ironing the wire. Is released. For this reason, only the torsional load of the torsion bar described above acts on the ebbing (occupant) as a force limiter load. In other words, the force-limited load is smaller than the force-limited load in the initial stage of the sudden deceleration of the vehicle (before the relative rotation of the spool reaches a predetermined value).
  • the force limit load can be changed at a predetermined timing by a simple structure, and the inertia energy of the occupant is more appropriately absorbed. can do.
  • the webbing retractor according to claim 5 is the webbing retractor according to claim 4, wherein the wire applies the load applied by the wire when the spool rotates relative to the shaft sensor.
  • An applied load changing means for gradually reducing the load immediately before the entire amount of the spool comes out of the spool is provided.
  • the spool is attached to the shaft and the sensor. The load applied by the ironing of the wire during relative rotation is gradually reduced by the load changing means immediately before the wire completely comes out of the spool.
  • the load acting on the occupant can be reduced by reducing the force limit load immediately before the contact between the airbag and the occupant, thereby further increasing the possibility of occupant injury.
  • the application of the load by ironing the wire as described above is instantaneously performed, the airbag will be deployed before the force limiter load decreases due to an assembly error or the like. could be done.
  • the load applied by the ironing of the wire is gradually reduced by the load changing means immediately before the entire amount of the wire comes out of the spool. Even if the airbag is deployed due to an assembly error, etc., before all the load applied by the ironing is released, the force limiter load can be reduced and the load acting on the occupant can be reduced. It is possible to more reliably reduce the possibility of injury.
  • FIG. 1 is a cross-sectional view showing an entire configuration of a webbing take-up device according to a first embodiment of the present invention.
  • FIG. 2 is a cross-sectional view showing a configuration of a groove, a pin, and a slot provided in a shaft sensor of the webbing take-up device according to the first embodiment of the present invention.
  • FIG. 3 is a cross-sectional view in an energy absorbing state showing a configuration of a groove, a pin, and a slot provided in a shaft sensor of the webbing retractor according to the first embodiment of the present invention.
  • FIG. 4 is a diagram showing the relationship between the ebbing tension (force limiter load) and the amount of rotation in the ebbing pull-out direction in the webbing take-up device according to the first embodiment of the present invention.
  • FIG. 5 is a cross-sectional view showing an entire configuration of a webbing take-up device according to a second embodiment of the present invention.
  • FIG. 6 is a sectional view showing a configuration of a projection provided on a shaft sensor and a shearing portion provided on a spool of a webbing take-up device according to a second embodiment of the present invention.
  • FIG. 7 is a cross-sectional view illustrating an entire configuration of a webbing take-up device according to a third embodiment of the present invention.
  • FIG. 8 is a cross-sectional view of a webbing take-up device according to a third embodiment of the present invention in an energy absorbing state.
  • FIG. 9 is a cross-sectional view showing a modification of the webbing take-up device according to the third embodiment of the present invention.
  • Fig. 1 OA is a diagram showing the relationship between the webbing pulling force (force limiter load) and the amount of rotation in the webbing pull-out direction in a modified example of the webbing take-up device shown in Fig. 9, and Fig. 10B shows a comparative example.
  • FIG. 1 shows a configuration of a webbing take-up device 10 according to the first embodiment.
  • the webbing take-up device 10 includes a frame 12.
  • the frame 12 is substantially U-shaped and includes a pair of opposing leg pieces and a spine piece connecting the leg pieces, and is fixed to the vehicle body at the spine portion.
  • a cylindrical spool 14 whose axial direction is opposite to the leg piece is provided between the pair of leg pieces facing the frame 12.
  • This spool 14 has webbing 3 4 One end of the spool 14 is locked, and the webbing 34 can be taken up and pulled out of the spool 14 by the rotation of the spool 14.
  • a shaft sensor 16 is disposed at one end (left end in FIG. 1) of the spool 14.
  • the shaft sensor 16 is coaxially and rotatably supported by the spool 14 in one leg opening of the frame 12.
  • the shaft sensor 16 is connected to a lock plate 36 which constitutes a lock means.
  • an acceleration sensor not shown
  • the lock plate 36 is inserted into the frame 12.
  • the shaft sensor 16 is prevented from rotating.
  • the shaft sensor 16 is connected to one end of a torsion bar 20 arranged at the axial center of the spool 14.
  • the shaft sensor 16 is always connected to one end of the torsion bar 20. It is configured to rotate integrally with the part.
  • a sleeve 18 is arranged at the other end (the right end in FIG. 1) of the spool 14.
  • the sleeve 18 is connected integrally to the spool 14 by fitting spline-shaped teeth (not shown), and is coaxial with the spool 14 at the other leg opening of the frame 12 and It is rotatably supported.
  • the distal end of the sleeve 18 projects outward from the leg piece, and a spring is provided at the end of the projection (not shown).
  • the sleeve 18 is constantly urged to rotate in the direction of winding the webbing 34.
  • the sleeve 18 is connected to the other end of the torsion bar 20 so that the sleeve 18 is connected to the shaft sensor 16 via the torsion bar 20.
  • the spool 14, the sleeve 18, the torsion bar 20, and the shaft sensor 16 are configured to rotate integrally.
  • the shaft sensor 16 is provided with a groove 22 constituting a load applying means. As shown in FIG. 2, the groove 22 is formed so as to be gradually shallower in the direction of pulling out the webbing 34 of the spool 14 (the direction of rotation relative to the shaft sensor 16). In other words, the cross section of the substantially circular shaft sensor 16 shown in FIG. The radius gradually increases from a predetermined position (a position where a pin sterod 24 described later is accommodated) in the relative rotation direction.
  • a pin slotted member 24 which similarly constitutes a load applying means is arranged.
  • the pin / mouth Ted 24 is housed in the groove 22 while being locked to the spool 14, and always rotates integrally with the spool 14.
  • the pin steering rod 24 is housed at a predetermined position, that is, at a deep portion 22 A where the depth of the groove in the groove 22 is substantially deepest.
  • the spool 14 and the shaft sensor 16 are connected by the torsion bar 120. Usually, these components rotate integrally and the webbing 34 is pulled out and taken up. Is free.
  • the lock plate 36 is inserted into the frame 12, and the shaft 'sensor 16 is moved in the direction of the webbing withdrawal. Rotation is blocked.
  • the webbing tensile force acts on the torsion bar 20 via the spool 14 as a rotational force in the webbing pull-out direction.
  • the torsion bar 20 is twisted, and the spool 14 is moved with respect to the shaft sensor 16 while maintaining a constant load acting on the webbing 34 (occupant) (while a constant force limit load is applied).
  • the webbing 34 is pulled out by being rotated in the webbing pull-out direction, and the energy is absorbed by the torsion bar 20.
  • the pin slot 24 is rotated together with the spool 14 and the shaft sensor 16 is rotated. It moves within the groove 22 provided in the (see FIG. 3 state). Since the groove 22 is formed to be gradually shallower in the relative rotation direction of the spool 14, the pin mouth ted 24 is moved while being deformed, thereby resisting the relative rotation of the spool 14. A load is applied.
  • the load due to the deformation of the pin slot 24 in addition to the torsional load of the above-mentioned torsion bar 20 is applied to the webbing 34 (occupant) as a force limiter load.
  • a force-limited load larger than the force-limited load obtained only by the torsional load of the torsion bar 20 is obtained.
  • the relationship between the webbing tensile force (corresponding to the force limiter load) and the rotation amount of the spool 14 at this time is shown in FIG. 4, and the force limiter load obtained only by the torsional load of the torsion bar 20 (FIG. 4). Since a larger force limiter load (F2 in Fig. 4) is obtained than F1) in Fig. 4, the ebbing 3-4 withdrawal speed (spool 14 rotation speed) is kept low to achieve appropriate energy absorption.
  • the force limiter load is smaller than the force limiter load in the initial stage of the vehicle rapid deceleration (before the relative rotation of the spool 14 with respect to the shaft ′ sensor 16 reaches the predetermined amount) (the load F 2 in FIG. 4 is the load). F1).
  • the force limiter load can be changed at a predetermined timing. That is, in the initial stage of the vehicle rapid deceleration, a load is applied by the pin / mouth 24 and the groove 22 (load applying means) to increase the amount of energy absorption per hour, and the withdrawal amount of the webbing 34 (for the occupant).
  • This embodiment has desirable characteristics because the load on the occupant can be reduced by suppressing the amount of movement) and reducing the amount of energy absorbed per time after the predetermined energy absorption.
  • the load acting on the occupant can be reduced by reducing the force limiter load immediately before the contact between the airbag and the occupant, thereby further reducing occupant injury.
  • reduce the load acting on the occupant by reducing the force-limited load immediately before the occupant comes into contact with the vehicle interior such as the steering wheel and instrument panel (dashboard). It is possible to reduce occupant injuries.
  • the depth of the groove 22 depends on the relative rotation of the spool 14 with respect to the shaft sensor 16. Although the depth is gradually reduced toward the direction, the present embodiment is not limited to this.
  • the rate of change of the depth of the groove 22 may be constant, or the rate of change of the depth of the groove 22 may be changed according to the rotational position of the spool 14 relative to the shaft ′ sensor 16. good.
  • the force-limited load can be changed at a predetermined evening by a simple structure, and the inertia energy of the occupant is further reduced. Can be absorbed.
  • FIG. 5 shows the configuration of a webbing take-up device 40 according to the second embodiment.
  • the webbing take-up device 40 has basically the same configuration as the webbing take-up device 10 according to the first embodiment, but the shaft sensor 16 has, as shown in detail in FIG. A projection 42 constituting a load applying means is formed. Further, the spool 14 is formed with a shear portion 44 which similarly constitutes a load applying means. The cutting portion 44 is formed of at least one, preferably a plurality of protrusions formed over the entire circumference of the spool 14, and is formed when the spool 14 rotates relative to the shaft sensor 16. 42 Engage with 2 and shear with the specified load.
  • the torsion bar 20 is twisted as in the first embodiment described above. While keeping the load acting on the webbing 34 (occupant) constant (while a constant force limiter load is being applied), the spool 14 is rotated in the webbing withdrawal direction with respect to the shaft sensor 16 so that the webbing is removed. 34 is drawn out, and energy absorption by the torsion pump 20 is achieved.
  • the torsion bar 20 is twisted and the spool 14 is connected to the shaft sensor 16.
  • the protrusion 42 provided on the shaft sensor 16 engages with the shearing portion 44 (projection) provided on the spool 14 and shears the shearing portion 44 (projection). A load against the relative rotation of the spool 14 is applied.
  • the load caused by the shearing of the shear portion 44 acts on the webbing 34 (occupant) as a force limiter load. That is, a force-limited load greater than the force-limited load obtained only by the torsional load of the torsion bar 20 is obtained, and the webbing 34 (4) withdrawal speed (spool 14 rotation speed) is kept low to properly absorb energy. Is fulfilled. Further, when the spool 14 makes one rotation with respect to the shaft sensor 16, the shearing of the shearing portion 44 ends, and the application of the load by the shearing of the shearing portion 44 is released.
  • the force limiter load is smaller than the force limit load at the initial stage of the vehicle rapid deceleration (before the relative rotation of the spool 14 with respect to the shaft sensor 16 reaches a predetermined amount).
  • the shear portion 44 is composed of a plurality of protrusions formed over the entire circumference of the spool 14, but the present embodiment is not limited to this.
  • the plurality of protrusions need not be formed over the entire circumference of the spool 14.
  • the shapes of the plurality of projections may be different (for example, the width of the spool 14 in the circumferential direction may be different).
  • the plurality of protrusions may be formed on the spool 14 at regular intervals, or may not be regular intervals.
  • the force limiter load can be changed at a predetermined timing by a simple structure, and the inertia energy of the occupant is more appropriately absorbed. be able to.
  • FIG. 7 shows a configuration of a webbing take-up device 50 according to the third embodiment.
  • the webbing take-up device 50 has basically the same configuration as the webbing take-up device 10 according to the first embodiment, except that a hole 52 is formed in the spool 14. In addition, a hole 54 is formed in the shaft sensor 16 so as to face the hole 52. Further, a wire 56 as a load applying means is stretched between the shaft sensor 16 and the spool 14. The wire 56 is movably inserted into the hole 52 of the spool 14, and one end (the left end in FIG. 7) passes through the hole 54 of the shaft sensor 16, and then passes through the shaft sensor 1. It is locked by a push nut 58 provided on 6 and is integrally connected to the shaft sensor 16.
  • the torsion bar 20 is twisted as in the first embodiment described above. While keeping the load acting on the webbing 34 (occupant) constant (while a constant force limiter load is being applied), the spool 14 is rotated in the webbing withdrawal direction with respect to the shaft sensor 16 so that the webbing is removed. 34 is pulled out, and the energy is absorbed by the torsion bar 20.
  • the wire 56 is rotated at the outlets of the holes 52 and 54 with the rotation of the spool 14.
  • the spool 14 rotates while being wound on the side of the spool 14 (as shown in FIG. 8).
  • the ironing load of the wire 56 acts on the webbing 34 (occupant) as a force limiter load.
  • a force limiter load larger than the force limit load obtained only by the torsional load of the torsion bar 20 can be obtained, and the webbing 34 pull-out speed (spool 14 rotation speed) is kept low. And appropriate energy absorption is achieved.
  • the force limit load can be changed at a predetermined timing with a simple structure, and the occupant's inertia energy can be more appropriately absorbed. can do.
  • the application of the load due to the ironing of the wire 56 is performed immediately before the wire 56 completely comes out of the hole 52 of the spool 14. It is also possible to provide an applied load changing means for gradually reducing the load and control the applied load.
  • a plurality of contact pins (hanging pins) 60 as means for changing the applied load are provided near the outlet in the hole 52 of the spool 14, and wires 56 are attached to these contact pins 60.
  • a configuration in which the wires 56 are sequentially contacted (the wires 56 are sequentially wound on the contact pins 60) may be adopted.
  • the load acting on the occupant can be reduced by reducing the force limiter load immediately before the contact between the airbag and the occupant, further increasing the possibility of occupant injury.
  • FIG. 10 (B) when the release of the load by the ironing of the wire 56 is instantaneously performed as shown in FIG. 10 (B) (point A), there was an assembly error etc.
  • the airbag may deploy before the force limit load decreases.
  • the load applied by the ironing of the wire 56 is, as shown in FIG. Since it is gradually reduced just before the whole amount comes out of the hole 52 of 14, before the application of the load due to the ironing of the wire 56 is released (before point A)
  • the force limiting load is at least smaller than F2 in Fig. 10 (A), and the load acting on the occupant is reduced.
  • the possibility of occupant injury can be reduced more reliably.
  • the applied load changing means is not limited to the above-described configuration in which the contact pins 60 are provided, but may be configured to form the end portion of the wire 56 in a tapered shape (expanded in diameter), or by ironing. However, it is possible to adopt a configuration in which the material is changed so that the characteristics are different.
  • the contact pin 60 is connected to the spool 14 in order to gradually reduce the application of the load due to the ironing of the wire 56 immediately before the wire 56 completely comes out of the hole 52 of the spool 14.
  • the contact pins 60 may be provided in the entire area of the hole 52 of the spool 14.
  • the arrangement interval of the contact pins 60 may be constant or may not be constant. Effect of the Invention
  • the webbing take-up device according to the present invention can change the force limiter load at a predetermined timing with a simple structure, and can more appropriately absorb the occupant's inertia energy. It has an excellent effect of being able to.

Abstract

L'invention concerne un enrouleur de ceinture de sécurité dans lequel une charge de limiteur de force peut être modifiée à un moment prédéterminé à l'aide d'une construction simple, ce qui permet d'absorber l'énergie inertielle d'un passager. Dans cet enrouleur (10) de ceinture de sécurité, un capteur (16) de position d'axe est doté d'une rainure (22) destinée à recevoir une goupille fendue (24), ladite rainure coopérant également avec un enrouleur (14). Lors de l'étape d'absorption d'énergie, non seulement la charge de torsion exercée sur une barre de torsion (20) mais également la charge due à la déformation de la goupille fendue (24) est exercée afin de produire une charge élevée de limiteur de force. Lorsque l'enrouleur fait un tour par rapport au capteur d'axe (16), la charge exercée par suite de la déformation de la goupille fendue (24) s'annule afin de réduire la charge du limiteur de force.
PCT/JP2001/010198 2000-05-24 2001-11-22 Enrouleur de ceinture de securite WO2003043860A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2000153796A JP4278832B2 (ja) 2000-05-24 2000-05-24 ウエビング巻取装置
PCT/JP2001/010198 WO2003043860A1 (fr) 2000-05-24 2001-11-22 Enrouleur de ceinture de securite

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2000153796A JP4278832B2 (ja) 2000-05-24 2000-05-24 ウエビング巻取装置
PCT/JP2001/010198 WO2003043860A1 (fr) 2000-05-24 2001-11-22 Enrouleur de ceinture de securite

Publications (1)

Publication Number Publication Date
WO2003043860A1 true WO2003043860A1 (fr) 2003-05-30

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ID=27736286

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4559666B2 (ja) 2001-07-11 2010-10-13 株式会社東海理化電機製作所 ウエビング巻取装置
JP3984024B2 (ja) 2001-11-02 2007-09-26 株式会社東海理化電機製作所 ウエビング巻取装置
JP4602778B2 (ja) * 2005-01-26 2010-12-22 株式会社東海理化電機製作所 ウエビング巻取装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1035411A (ja) * 1996-07-18 1998-02-10 Nippon Seiko Kk シートベルト用リトラクター
JPH10100860A (ja) * 1996-09-26 1998-04-21 Suncall Corp 自動車用シートベルトの緩衝装置
JP2001180437A (ja) * 1999-12-27 2001-07-03 Takata Corp シートベルトリトラクタ
JP2001301569A (ja) * 2000-04-24 2001-10-31 Tokai Rika Co Ltd ウェビング巻取装置及び車両

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1035411A (ja) * 1996-07-18 1998-02-10 Nippon Seiko Kk シートベルト用リトラクター
JPH10100860A (ja) * 1996-09-26 1998-04-21 Suncall Corp 自動車用シートベルトの緩衝装置
JP2001180437A (ja) * 1999-12-27 2001-07-03 Takata Corp シートベルトリトラクタ
JP2001301569A (ja) * 2000-04-24 2001-10-31 Tokai Rika Co Ltd ウェビング巻取装置及び車両

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JP4278832B2 (ja) 2009-06-17

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