JP2015003569A - Webbing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a webbing device which inhibits the deterioration of the usability of a webbing during normal operation of a vehicle and enables a fluid to effectively pass through a tongue insertion portion of the webbing at predetermined occasions.SOLUTION: In a seat belt device 10, a spacer is fixed to a tongue 24 insertion portion of a webbing 18 and the spacer is soft. Thus, during the normal operation of a vehicle, flexibility of the webbing 18 is inhibited from being deteriorated by the spacer and deterioration in the usability of the webbing 18 is inhibited. Further, during an emergency of the vehicle, an impact is input from the tongue 24 to the spacer to harden the spacer. The action limits crush of the tongue 24 insertion portion of the webbing 18. Therefore, a gas generated by an inflator 30 effectively passes from a lap webbing 18A of the webbing 18 into a shoulder webbing 18B through the tongue 24 insertion portion.

Description

  The present invention relates to a webbing device in which webbing is mounted on a vehicle occupant.

  In the seat belt device described in Patent Document 1 below, the seat belt is inserted into the tongue plate, and the inflator supplies gas into one end side of the seat belt at the time of a rear-end collision of the vehicle.

  In addition, a wiring member is provided in the seat belt, and the wiring member suppresses the seat belt from being blocked by the load from the tongue plate, so that the gas supplied by the inflator is changed to the tongue plate of the seat belt. Further, it can pass from the one end side to the other end side.

  However, in this seat belt device, when the routing member has low rigidity, the routing member cannot effectively suppress the seat belt from being blocked by the load from the tongue plate during the rear-end collision of the vehicle. The gas cannot effectively pass through the tongue plate insertion portion of the seat belt. On the other hand, when the rigidity of the routing member is high, the flexibility of the seat belt is reduced by the routing member, and the usability of the seat belt is reduced when the vehicle is normal.

JP 2012-121410 A

  In view of the above facts, the present invention has an object to obtain a webbing device that can suppress a decrease in usability of webbing during normal operation of the vehicle, and that allows fluid to effectively pass through the tongue insertion portion of the webbing at a predetermined opportunity. is there.

  The webbing device according to claim 1, wherein a webbing that allows fluid to pass in a longitudinal direction, a tongue through which the webbing is inserted, and a portion of the webbing that is one side of the tongue by mounting the tongue. The other side part is provided on the webbing, a buckle to be attached to the waist and chest of the vehicle occupant, a supply means for supplying fluid to the one side part from the tongue of the webbing at a predetermined opportunity, and a softness And limiting means for limiting the crushing of the webbing by being hardened by a load from the tongue at a predetermined opportunity.

  The webbing device according to a second aspect is the webbing device according to the first aspect, wherein the restricting means is softened after being cured to allow the webbing to be crushed.

  A webbing device according to claim 3 is the webbing device according to claim 1 or 2, further comprising an increasing means for increasing a restraining force of the occupant by the webbing at a predetermined opportunity, wherein the increasing means is based on the webbing. After the occupant's restraining force is increased, the restricting means is softened to allow the webbing to be crushed.

  A webbing device according to a fourth aspect is the webbing device according to any one of the first to third aspects, wherein the restricting means is provided on both sides in the width direction of the webbing.

  In the webbing device according to claim 1, the webbing is inserted into the tongue, and when the tongue is attached to the buckle, the one side portion and the other side portion of the webbing tongue are respectively the waist and chest of the occupant of the vehicle It is attached to.

  Further, the fluid is allowed to pass in the longitudinal direction of the webbing, and the supply means supplies the fluid to the one side portion of the webbing tongue at a predetermined opportunity.

  Here, the webbing is provided with a limiting means, and the limiting means has flexibility. For this reason, it can suppress that the flexibility of webbing falls by a restriction | limiting means at the normal time of a vehicle, and can suppress the fall of the usability of webbing.

  Further, at a predetermined opportunity, the limiting means is hardened by the load from the tongue to limit the crushing of the webbing. For this reason, the fluid can effectively pass through the tongue insertion portion of the webbing.

  In the webbing device according to the second aspect, the limiting means is softened after being cured to allow the webbing to be crushed. For this reason, it can suppress that the fluid which passed from the one side part to the other side part from the tongue of the webbing flows back to the one side part from the tongue of the webbing because the webbing is crushed by the load from the tongue.

  In the webbing device according to the third aspect, the increase means increases the restraining force of the occupant by the webbing at a predetermined opportunity.

  Here, after the increasing means increases the restraining force of the occupant by the webbing, the limiting means is softened to allow the webbing to be crushed. For this reason, it can suppress that the fluid which passed from the one side part to the other side part from the tongue of the webbing flows back to the one side part from the tongue of the webbing because the webbing is crushed by the load from the tongue.

  In the webbing device according to the fourth aspect, the restricting means is provided on both sides in the width direction of the webbing. For this reason, when the limiting means is cured, the limiting means can effectively limit the crushing of the webbing, and the fluid can pass more effectively through the tongue insertion portion of the webbing.

It is a front view showing a seat belt device concerning an embodiment of the present invention. It is a width direction sectional view showing webbing in a seatbelt device concerning an embodiment of the present invention, (A) shows lap webbing and (B) shows shoulder webbing. (A)-(C) are width direction sectional drawings which show the tongue insertion part of the webbing in the seatbelt apparatus which concerns on embodiment of this invention, (A) shows the normal time of a vehicle, (B) FIG. 4C shows the time when the pretensioner is in operation, and FIG. It is width direction sectional drawing which shows the other example of the tongue insertion part of webbing in the seatbelt apparatus which concerns on embodiment of this invention.

  FIG. 1 is a front view of a seat belt device 10 according to an embodiment to which a webbing device of the present invention is applied.

  As shown in FIG. 1, a seat belt device 10 according to this embodiment is mounted on a vehicle seat 12. A seat cushion 12 </ b> A is provided at the lower part of the seat 12, and a seat back 12 </ b> B is provided at the rear portion of the seat 12, so that a vehicle occupant 14 can be seated on the seat 12.

  The seat belt device 10 includes a winding device 16 as a storing means, and the winding device 16 is located in the lower end of a vehicle body (for example, a center pillar (not shown)) at the rear side of the seat 12 in the vehicle width direction and on the vehicle lower side. ). In the winding device 16, a long belt-like webbing 18 (belt) is wound and stored from the base end side, and the webbing 18 is drawn from the winding device 16 to the upper side of the vehicle. The take-up device 16 is provided with a lock mechanism (not shown), and is used for predetermined times such as when the vehicle is in an emergency (when the webbing 18 is suddenly pulled out from the take-up device 16 or when the vehicle is suddenly decelerated). On the occasion of (1), the lock mechanism is activated to lock the withdrawal of the webbing 18 from the winding device 16.

  The front end portion of the webbing 18 from the winding device 16 is inserted into and supported by a shoulder anchor 20 serving as an upper support portion so as to be movable in the longitudinal direction. It is fixed to the vehicle body on the upper side of the vehicle (for example, the upper end of the center pillar). The front end of the webbing 18 is supported by an anchor 22 as a lower support portion, and the anchor 22 is fixed to the vehicle body on the vehicle width direction outside of the rear portion of the seat 12 and on the vehicle lower side.

  A substantially T-shaped tongue 24 is provided between the shoulder anchor 20 and the anchor 22 of the webbing 18. An elongated rectangular insertion hole 24A is formed through the tongue 24, and the webbing 18 is inserted into the insertion hole 24A so as to be movable in the longitudinal direction. A buckle 26 as an inner support portion is fixed to the vehicle body in the vehicle width direction at the rear of the seat 12 and on the vehicle lower side.

  The tongue 24 is detachable from the buckle 26, and the webbing 18 is pulled out from the winding device 16, and the tongue 24 is attached to and supported by the buckle 26, so that the occupant 14 seated on the seat 12 is supported. The webbing 18 is attached to the. As a result, the webbing 18 is folded back at the insertion part to the tongue 24, so that the part between the tongue 24 and the anchor 22 of the webbing 18 becomes the lap webbing 18 </ b> A (lap belt). While being worn from the front side, a portion between the shoulder anchor 20 and the tongue 24 of the webbing 18 is a shoulder webbing 18B (shoulder belt), and is worn on the shoulder and chest of the occupant 14 from the front side.

  The buckle 26 is fixed to the vehicle body via a pretensioner mechanism 32 as an increasing means. In the event of an emergency of the vehicle (a predetermined opportunity such as when a collision is detected), the pretensioner mechanism 32 is actuated to instantly The buckle 26 is suddenly moved to the rear side of the vehicle (or the lower side of the vehicle) with a high load due to the pressure of the high-pressure gas generated in the vehicle.

  At least one of the winding device 16, the shoulder anchor 20, the anchor 22, and the buckle 26 (pretensioner mechanism 32) may be fixed to the seat 12. Further, the seat 12 is not limited to a seat for one person but may be for a plurality of persons. In the case of a seat 12 for a plurality of persons, one side in the vehicle width direction of the seating position of the occupant 14 on the seat 12 In addition, a winding device 16, a shoulder anchor 20 and an anchor 22 are provided, and a buckle 26 is provided on the other side in the vehicle width direction of the seating position of the occupant 14 in the seat 12.

  2A and 2B, the widthwise cross section of the webbing 18 is annular, and the shoulder webbing 18B shown in FIG. 2B is a lap webbing shown in FIG. The circumferential dimension of the cross section in the width direction is made larger than that of 18A (including the portion inserted into the tongue 24). The shoulder webbing 18B is fixed at both ends in the width direction by sewing 18C in a state where both side portions in the width direction are inserted into the shoulder webbing 18B, so that the shoulder webbing 18B is connected to the lap webbing 18A (including a portion inserted into the tongue 24). The width direction dimensions are substantially the same. A cylindrical tube 28 is inserted in the webbing 18 along the longitudinal direction, and the tube 28 is made of, for example, rubber so as to be elastically expandable.

  As shown in FIG. 1, an inflator 30 as supply means is connected to the vicinity of the anchor 22 of the lap webbing 18 </ b> A (near the tip of the webbing 18), and the inflator 30 communicates with the inside of the tube 28. In an emergency of the vehicle (a predetermined opportunity such as when a collision is detected), the inflator 30 instantaneously generates a high-pressure gas as a fluid and supplies it into the tube 28. For this reason, the gas is supplied into the tube 28 of the shoulder webbing 18B through the tube 28 of the lap webbing 18A (including the insertion portion to the tongue 24), and the tube 28 of the shoulder webbing 18B is expanded. The sewing 18C at both ends in the width direction of the shoulder webbing 18B is broken, and the shoulder webbing 18B is elastically expanded in the thickness direction and the width direction (see the two-dot chain line in FIG. 1).

As shown in FIG. 3 (A), the tongue 24 insertion portion (the portion between the lap webbing 18A and the shoulder webbing 18B) of the webbing 18 when the webbing 18 is mounted on the occupant 14 is provided at both ends in the width direction. In the tube 28, a cylindrical spacer 34 (impact absorbing member) as a restricting means is fixed, and the spacer 34 is made of, for example, D30 ^™ (registered trademark) of D30 ^™ lab, UK. The spacer 34 has flexibility (flexibility), and when an impact (abrupt high load) is input to the spacer 34, the spacer 34 is instantly changed in intermolecular bond (intermolecular binding). When the impact is applied to the spacer 34, the spacer 34 is restored to intermolecular bonds (released from intermolecular bonds) and softened again.

  Next, the operation of this embodiment will be described.

  In the seat belt device 10 having the above configuration, the webbing 18 is pulled out from the winding device 16 and the tongue 24 is attached to the buckle 26, whereby the webbing 18 is attached to the occupant 14 seated on the seat 12, and the webbing is performed. 18 lap webbings 18A are attached to the waist of the occupant 14 from the front side, and shoulder webbings 18B of the webbing 18 are attached to the shoulders and chest of the occupant 14 from the front side.

  In the event of an emergency (such as a collision) of the vehicle, the lock mechanism of the winding device 16 is activated, and the withdrawal of the webbing 18 from the winding device 16 is locked. For this reason, the lap webbing 18A of the webbing 18 restrains the waist of the occupant 14 from the front side, and the shoulder webbing 18B of the webbing 18 restrains the shoulder and chest of the occupant 14 from the front side.

  Further, in the event of a vehicle emergency (such as when a collision is detected), the pretensioner mechanism 32 is activated and the buckle 26 is suddenly moved to the rear side of the vehicle (or the lower side of the vehicle) by the pressure of the high pressure gas generated instantaneously. Moved with high load. For this reason, the webbing 18 (the lap webbing 18A and the shoulder webbing 18B) is pulled by the buckle 26 through the tongue 24 to the rear side of the vehicle (or the vehicle lower side), and the tension is increased. The restraining force of the occupant 14 is increased.

  Further, in the event of a vehicle emergency (such as when a collision is detected), the inflator 30 instantaneously generates a high-pressure gas, so that the gas passes through the tube 28 of the lap webbing 18A (including the portion inserted into the tongue 24). Is supplied into the tube 28 of the shoulder webbing 18B, and the tube 28 of the shoulder webbing 18B is expanded. For this reason, the sewing 18C at both ends in the width direction of the shoulder webbing 18B is broken, and the shoulder webbing 18B is elastically expanded in the thickness direction and the width direction, so that the shoulder and chest of the occupant 14 act from the shoulder webbing 18B. Load to be reduced.

  Here, the spacer 34 is fixed in the tongue 24 insertion portion of the webbing 18 when the webbing 18 is attached to the occupant 14, and the spacer 34 has flexibility. For this reason, it is possible to suppress the flexibility of the webbing 18 from being lowered by the spacer 34 at the normal time of the vehicle. Thereby, when the webbing 18 is mounted on the occupant 14, it is possible to suppress a decrease in the permeability of the portion where the spacer 34 of the webbing 18 is disposed to the shoulder anchor 20 and the tongue 24, and when the webbing 18 is mounted on the occupant 14. It can suppress that 14 contacts the spacer 34 arrangement | positioning part of the webbing 18, and can feel a sense of incongruity, and can suppress the fall of the usability of the webbing 18.

  Further, as shown in FIG. 3 (B), when the pretensioner mechanism 32 is operated in an emergency of the vehicle, an impact is applied from the tongue 24 to the spacer 34 in the webbing 18 due to the sudden and high load movement of the buckle 26. By being input and the spacer 34 being cured, the spacer 34 limits the collapse of the webbing 18 due to the load from the tongue 24 of the tongue 24 insertion portion. For this reason, the flow path of the gas in the tube 28 in the tongue 24 insertion part of the webbing 18 can be effectively secured, and the gas generated by the inflator 30 flows from the tube 28 of the wrap webbing 18A to the tongue 24 insertion part of the webbing 18. The tube 28 of the shoulder webbing 18B can be effectively passed through the tube 28 and the tube 28 of the shoulder webbing 18B can be effectively inflated, so that the shoulder and chest of the occupant 14 can be removed from the shoulder webbing 18B. The applied load can be effectively reduced.

  In addition, spacers 34 are fixed to both ends in the width direction of the tongue 24 insertion portion of the webbing 18. For this reason, when the pretensioner mechanism 32 is actuated, the pair of spacers 34 are hardened, and therefore, the pair of spacers 34 effectively restricts the collapse of the webbing 18 due to the load from the tongue 24 of the tongue 24 insertion portion. Is done. Thereby, the flow path of the gas in the tube 28 in the tongue 24 insertion part of the webbing 18 can be more effectively secured, and the gas generated by the inflator 30 is inserted into the tongue 24 of the webbing 18 from the tube 28 of the lap webbing 18A. The tube 28 of the shoulder webbing 18B can be more effectively passed through the tube 28 and the tube 28 of the shoulder webbing 18B can be inflated more effectively, so that the shoulder and chest of the occupant 14 are shouldered. The load applied from the webbing 18B can be more effectively reduced.

  In an emergency of the vehicle, the tension of the webbing 18 is increased before the tension of the webbing 18 is increased by the operation of the pretensioner mechanism 32 before the pretensioner mechanism 32 is activated and the spacer 34 is cured. The spacer 34 suppresses crushing due to the load from the tongue 24 of the 24 insertion portion. For this reason, even if the timing at which the spacer 34 is cured is late, a gas flow path in the tube 28 in the tongue 24 insertion portion of the webbing 18 can be appropriately secured, and the gas generated by the inflator 30 is transferred to the lap webbing 18A. The tube 28 of the shoulder webbing 18B can be appropriately passed from the inside of the tube 28 through the tube 28 of the tongue 24 insertion portion of the webbing 18, and the tube 28 of the shoulder webbing 18B can be appropriately inflated. The load which a shoulder part, a chest, etc. act from shoulder webbing 18B can be reduced appropriately.

  Further, when the operation of the pretensioner mechanism 32 is finished in an emergency of the vehicle, the input of the impact from the tongue 24 to the spacer 34 in the webbing 18 is finished by the end of the movement of the buckle 26, and the spacer By softening 34 again, the tongue 24 insertion portion (including the spacer 34) of the webbing 18 is allowed to be crushed by the load from the tongue 24. For this reason, as shown in FIG. 3C, since the tension of the webbing 18 is increased by the operation of the pretensioner mechanism 32, the tongue 24 insertion portion of the webbing 18 is crushed by the load from the tongue 24. The gas passed from the tube 28 of the wrap webbing 18A into the tube 28 of the shoulder webbing 18B is prevented from flowing back into the tube 28 of the wrap webbing 18A through the tube 28 of the tongue 24 insertion portion of the webbing 18. it can. Thereby, the state where the tube 28 of the shoulder webbing 18B is effectively inflated can be maintained, and the state where the load applied to the shoulder portion and the chest portion of the occupant 14 from the shoulder webbing 18B can be effectively reduced. .

  In this embodiment, when the vehicle is in an emergency, the pretensioner mechanism 32 is operated, so that an impact is input from the tongue 24 to the spacer 34 in the webbing 18 and the spacer 34 is cured. However, even if the moving force (inertial force or the like) of the occupant 14 is applied to the webbing 18 in an emergency of the vehicle, even if the impact is input from the tongue 24 to the spacer 34 in the webbing 18 and the spacer 34 is cured. Good.

  In this embodiment, the spacer 34 is provided in the tube 28 in the webbing 18. However, for example, as shown in FIG. 4, a spacer 34 may be provided outside the tube 28 in the webbing 18. Further, in addition to the configuration in which the spacer 34 is provided in the webbing 18 or in place of the configuration in which the spacer 34 is provided in the webbing 18, at least one material of the webbing 18 and the tube 28 may be used as the material of the spacer 34. In addition, when the material of the webbing 18 is used as the material of the spacer 34, the portion of the tube 28 that is used as the material of the spacer 34 in the webbing 18 may be omitted.

  Further, in the present embodiment, the pretensioner mechanism 32 is provided on the buckle 26. However, together with or instead of this, the pretensioner mechanism 32 may be provided in at least one of the winding device 16, the shoulder anchor 20 and the anchor 22.

  When the pretensioner mechanism 32 is provided in the winding device 16, the pretensioner mechanism 32 is actuated, and the webbing 18 is rapidly wound with a high load on the winding device 16 by the pressure of the high-pressure gas generated instantaneously.

  When the pretensioner mechanism 32 is provided on the shoulder anchor 20, the pretensioner mechanism 32 is actuated, and the shoulder anchor 20 is rapidly raised to the rear side of the vehicle (or the upper side of the vehicle) by the pressure of the high-pressure gas generated instantaneously. Move with load.

  When the pretensioner mechanism 32 is provided on the anchor 22, the pretensioner mechanism 32 is actuated and the anchor 22 is suddenly heavily loaded on the rear side of the vehicle (or on the lower side of the vehicle) by the pressure of the high pressure gas generated instantaneously. Move with.

10 Seat belt device (webbing device)
18 Webbing 24 Tongue 26 Buckle 30 Inflator (supply means)
32 Pretensioner mechanism (increase means)
34 Spacer (Limiting means)

Claims (4)

A webbing that allows fluid to pass longitudinally;
A tongue into which the webbing is inserted;
A buckle attached to the waist and chest of a vehicle occupant by attaching the tongue to the tongue of the webbing on one side and the other side of the tongue,
Supply means for supplying fluid to one side of the tongue of the webbing at a predetermined opportunity;
Limiting means that is provided on the webbing, has a softness, is hardened by a load from the tongue on a predetermined occasion, and restricts crushing of the webbing;
Webbing device equipped with.   The webbing apparatus according to claim 1, wherein the limiting unit is softened after being cured to allow the webbing to be crushed.   An increasing means for increasing the restraining force of the occupant by the webbing at a predetermined opportunity, and after the increasing means increases the restraining force of the occupant by the webbing, the restricting means is softened to allow the webbing to be crushed. The webbing device according to claim 1 or 2.   The webbing device according to any one of claims 1 to 3, wherein the restricting means is provided on both sides in the width direction of the webbing.

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