JP6300636B2 - Webbing device - Google Patents

Description

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

  In the inflatable belt device described in Patent Literature 1 below, the inflatable portion is inflated by supplying gas into the inflatable portion of the inflatable belt. Moreover, the 1st layer and 2nd layer which the expandable part opposes are connected by the connection part.

  By the way, in this air belt device, the connecting position of the inflatable portion by the connecting portion between the first layer and the second layer is arranged symmetrically with respect to the center in the width direction of the inflatable portion, and the amount of expansion of the inflatable portion expands. It is made the same on both sides in the width direction of the possible portion.

  Here, in such an air belt device, it may be preferable that the inflatable portion can be displaced in the width direction by expansion.

JP 2007-210420 A

  In view of the above facts, an object of the present invention is to obtain a webbing device that can displace a bag body in the width direction of the webbing by expansion.

  The webbing device according to claim 1 is provided on a webbing that is mounted on a vehicle occupant, and is provided with a first layer and a second layer facing each other, and is inflated by supplying a fluid therein. A bag body, and a coupling portion that couples the first layer and the second layer at a position asymmetric with respect to the center of the bag body in the webbing width direction.

  A webbing device according to a second aspect is the webbing device according to the first aspect, wherein the coupling portion disposed on the chest of the occupant is shifted upward with respect to the webbing width direction center of the bag body. .

  A webbing device according to a third aspect is the webbing device according to the first or second aspect, wherein the coupling portion is connected to the webbing width direction end of the bag body.

  A webbing device according to a fourth aspect is the webbing device according to any one of the first to third aspects, wherein the coupling portion is opposed to an end in the width direction of the webbing.

  A webbing device according to a fifth aspect is the webbing device according to any one of the first to fourth aspects, wherein the webbing is displaced in the width direction when the bag body is expanded.

  A webbing device according to a sixth aspect is the webbing device according to any one of the first to fifth aspects, wherein the coupling portion is extended non-parallel to the width direction of the webbing.

  In the webbing device according to the first aspect, the bag is provided on the webbing to be mounted on the vehicle occupant, and the bag is inflated by supplying the fluid into the bag. Further, the bag is provided with the first layer and the second layer facing each other.

  Here, the coupling portion couples the first layer and the second layer of the bag body at a position asymmetric with respect to the center of the bag body in the webbing width direction. For this reason, the bag can be deformed in the width direction of the webbing by expansion, and the bag can be displaced in the width direction of the webbing by expansion.

  In the webbing device according to the second aspect, the coupling portion disposed on the chest of the occupant is displaced upward with respect to the center of the bag body in the webbing width direction. For this reason, the bag body arrange | positioned at a passenger | crew's chest can be changed below by expansion | swelling, the said bag body can be displaced below by expansion | swelling, and it acts on a passenger | crew's chest from a bag body. The load can be reduced.

  In the webbing device according to the third aspect, the coupling portion is connected to the webbing width direction end of the bag body. For this reason, the bag can be effectively deformed in the width direction of the webbing by expansion, and the bag can be effectively displaced in the width direction of the webbing by expansion.

  In the webbing device according to the fourth aspect, the coupling portion is opposed to the widthwise end of the webbing. For this reason, it can suppress that a bag body is bent along the width direction end of webbing because the pressure of the fluid supplied in a bag body becomes high in the fluid supply side of a joint part.

  In the webbing device according to the fifth aspect, the webbing is displaced in the width direction by inflating the bag. For this reason, the position of the passenger | crew to which the load from webbing acts can be adjusted.

  In the webbing device according to the sixth aspect, the coupling portion is extended non-parallel to the width direction of the webbing. For this reason, the bag can be effectively deformed in the width direction of the webbing by expansion, and the bag can be effectively displaced in the width direction of the webbing by expansion.

It is a front view which shows the time of bag expansion | deployment of the seatbelt apparatus which concerns on 1st Embodiment of this invention. It is an expanded top view showing the principal part of the air belt in the seatbelt device concerning a 1st embodiment of the present invention. It is a top view which shows the air belt in the seatbelt apparatus which concerns on 1st Embodiment of this invention. It is sectional drawing (4-4 sectional view taken on the line of FIG. 3) which shows the air belt in the seatbelt apparatus which concerns on 1st Embodiment of this invention. It is an expansion | deployment top view which shows the principal part of the air belt in the seatbelt apparatus which concerns on 2nd Embodiment of this invention.

[First Embodiment]
FIG. 1 is a front view of a seat belt device 10 according to a first embodiment to which a webbing device of the present invention is applied. In FIG. 1, the outer side in the vehicle width direction (right side of the vehicle) is indicated by an arrow OUT, and the upper side is indicated by an arrow UP.

  As shown in FIG. 1, a seat belt device 10 according to this embodiment is mounted on a vehicle seat 12, and the front, right, and upper sides of the seat 12 are directed to the front, right, and upper sides of the vehicle, respectively. ing. 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 long substantially belt-shaped air belt 16 as a webbing body, and the air belt 16 is provided with a long belt-shaped webbing 18 (belt) along the longitudinal direction.

  The webbing 18 is wound and stored in a winding device 20 as a storing means from the base end side in the longitudinal direction, and the winding device 20 is on the outer side in the vehicle width direction of the seat 12 and on the rear side of the vehicle. While being fixed to the vehicle body (or the seat 12), the webbing 18 is pulled out to the front side of the vehicle. The take-up device 20 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 20 or when the vehicle is suddenly decelerated). On the occasion of (1), the lock mechanism is operated to lock the withdrawal of the webbing 18 from the winding device 20.

  The front end portion of the webbing 18 from the winding device 20 is inserted into and supported by a shoulder anchor 22 as an upper support portion so as to be movable in the longitudinal direction, and the shoulder anchor 22 is outside the seat 12 in the vehicle width direction. It is fixed to the vehicle body (seat 12 may be sufficient) at the rear side of the upper part and the vehicle. The front end of the webbing 18 in the longitudinal direction is supported by an anchor 24 as an outer support portion, and the anchor 24 is fixed to the vehicle body (or the seat 12) on the outer side and the lower side of the rear portion of the seat 12 in the vehicle width direction.

  A portion of the webbing 18 between the shoulder anchor 22 and the anchor 24 is inserted into a tongue 26 as a mounting portion so as to be movable in the longitudinal direction. Further, a buckle 28 serving as an inner support portion is fixed to the vehicle body (or the seat 12) on the inner side and the lower side of the rear portion of the seat 12 in the vehicle width direction.

  The tongue 26 is detachable from the buckle 28, and the webbing 18 is pulled out from the winding device 20, and the tongue 26 is attached to and supported by the buckle 28, so that the occupant 14 seated on the seat 12 is supported. The webbing 18 is mounted from the front side. As a result, the webbing 18 is folded back at the portion where the tongue 26 is inserted, so that the portion between the shoulder anchor 22 and the tongue 26 of the webbing 18 is made the shoulder webbing 18A (shoulder belt), and the shoulder of the occupant 14 The wrap webbing 18B (lap belt) is used as a part between the tongue 26 and the anchor 24 of the webbing 18 and the lateral part of the occupant 14 is worn laterally. .

  As shown in FIGS. 1 to 4, the air belt 16 is provided with a long bag-shaped bag 30 as a bag body along the longitudinal direction. The bag 30 is formed from a shoulder webbing 18 </ b> A of the webbing 18 to a lap webbing. It arrange | positions in the range to 18B, and is penetrated by the tongue 26 with the webbing 18 so that a movement to a longitudinal direction is possible. The bag 30 has a symmetrical shape with respect to the center line in the width direction, and the center line in the width direction of the bag 30 is disposed along the center line in the width direction of the webbing 18. The width direction size of the bag 30 is larger than the width direction size of the webbing 18, and both side portions of the bag 30 in the width direction are extended outward in the width direction of the webbing 18.

  The central portion in the width direction of the bag 30 is disposed on one side in the thickness direction of the webbing 18, and the portion other than the periphery of the anchor 24 of the bag 30 is the one side portion in the width direction (upper side) in the thickness direction of the webbing 18. Folded to the other side, the other side in the width direction (lower side) is folded to the other side in the thickness direction of the webbing 18 on the side opposite to the webbing 18 on one side in the width direction of the bag 30. . When the webbing 18 is attached to the occupant 14, the bag 30 is folded together with the webbing 18 at the insertion portion to the tongue 26, and the center part in the width direction of the bag 30 is located at the position of the shoulder webbing 18A. The webbing 18 is disposed on the side opposite to the occupant 14 at the position of the lap webbing 18B.

  The bag 30 is formed into a bag shape by so-called bag weaving. The bag 30 has a long strip surface layer 32A as a first layer on the side opposite to the webbing 18 and a length as a second layer on the webbing 18 side. And a strip-like back layer 32B. A side coupling portion 34A and an end coupling portion 34B are respectively formed in the width direction both ends of the bag 30 and in the vicinity of the longitudinal direction proximal end portion (end portion on the webbing 18 longitudinal direction proximal end side), and the side coupling portion 34A is formed. The end coupling portion 34B is formed of a so-called single weave, and the surface layer 32A and the back layer 32B are coupled (integrated). As a result, the bag 30 is opened at the front end in the longitudinal direction (between the surface layer 32A and the back layer 32B) (the end on the front end side in the longitudinal direction of the webbing 18). Further, the back layer 32B and the base end portion in the longitudinal direction in the bag 30 in the vicinity of the distal end portion in the longitudinal direction are coupled to the webbing 18 by stitching.

  A predetermined number (four in this embodiment) of first coupling portions 36 as coupling portions are formed in the bag 30 at the position of the shoulder webbing 18 </ b> A. It arrange | positions at equal intervals in a longitudinal direction, and is arrange | positioned in the range facing the chest lower part vicinity from the shoulder part of the passenger | crew 14 in the bag 30. FIG. The first coupling portion 36 has a substantially long rectangular shape, and the first coupling portion 36 is arranged with the longitudinal direction parallel to the width direction of the bag 30, and both longitudinal end portions thereof are semicircular. ing. The first coupling portion 36 is formed of a so-called single weave, and couples the surface layer 32A and the back layer 32B (integrally), and between the first coupling portion 36 and the side coupling portion 34A of the bag 30. A gap is formed in the width direction of the bag 30. The first coupling portion 36 is disposed at a position shifted to one side (upper side) in the width direction of the bag 30, and the first coupling portion 36 is disposed asymmetrically with respect to the center line in the width direction of the bag 30. The inner side portion of the first connecting portion 36 in the width direction of the bag 30 is opposed to one side portion (upper portion) of the webbing 18 in the thickness direction of the webbing 18, and the inner side of the first connecting portion 36 in the width direction of the bag 30. The portion is connected to one side portion in the width direction of the webbing 18 (shoulder webbing 18A) by sewing.

  The bag 30 is formed with a predetermined number (two in this embodiment) of second coupling portions 38 as additional coupling portions at the position of the shoulder webbing 18A in the vicinity of the front end side in the longitudinal direction from the predetermined number of first coupling portions 36. The predetermined number of second coupling portions 38 are matched in position in the longitudinal direction of the bag 30. The second coupling portion 38 has a substantially rectangular shape, and the second coupling portion 38 has a longitudinal direction arranged in parallel to the width direction of the bag 30 and has both end portions in the longitudinal direction semicircular. . The second coupling portion 38 is formed by a so-called single weave, and couples the surface layer 32A and the back layer 32B (integrally), and between the second coupling portion 38 and the side coupling portion 34A of the bag 30. A gap is formed between the second coupling portion 38 in the width direction of the bag 30. The predetermined number of second coupling portions 38 are arranged symmetrically with respect to the center line in the width direction of the bag 30, and the inner portion of the second coupling portion 38 in the width direction of the bag 30 is disposed on the outer portion of the webbing 18 in the width direction. Are opposed in the thickness direction. Further, the second coupling portion 38 on one side (upper side) in the width direction of the bag 30 is opposed to the first coupling portion 36 in the longitudinal direction of the bag 30.

  The air belt 16 is provided with a cylindrical cover 40 as a covering member along the longitudinal direction, and the cover 40 has flexibility. The cover 40 covers (accommodates) portions of the bag 30 other than the periphery of the anchor 24, and the cover 40 is inserted into the tongue 26 together with the webbing 18 and the bag 30 so as to be movable in the longitudinal direction.

  The air belt 16 is provided with a cylindrical tube 42 as a supply member along the longitudinal direction, and the tube 42 has flexibility. The tube 42 is inserted into the bag 30 from the longitudinal tip (open end) of the bag 30, and the longitudinal tip (end of the webbing 18 longitudinal tip) extends from the longitudinal tip of the bag 30. The tube 42 is disposed in one side portion (upper portion) in the width direction of the bag 30 at a portion other than the periphery of the anchor 24. The longitudinal base end side (the webbing 18 longitudinal base end side) of the tube 42 extends to the vicinity of the second coupling portion 38 of the bag 30, and the longitudinal base end of the tube 42 is disposed at the position of the shoulder webbing 18A. Thus, the first coupling portion 36 of the bag 30 and the second coupling portion 38 on one side (upper side) in the width direction are opposed to each other in the longitudinal direction of the bag 30.

  An inflator 44 (see FIG. 1) as a supply means communicates with the distal end of the tube 42 in the longitudinal direction, and the inflator 44 serves as a fluid in the event of a vehicle emergency (a predetermined opportunity such as when a collision is detected). High pressure gas is instantaneously generated and supplied into the tube 42. For this reason, when the gas is supplied into the bag 30 through the tube 42, the bag 30 is inflated and deployed on one side in the thickness direction of the webbing 18 while the cover 40 is broken.

  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 20 and the tongue 26 is attached to the buckle 28, so that the webbing 18 is attached to the occupant 14 seated on the seat 12 from the front side. The shoulder webbing 18A of the webbing 18 is attached obliquely to the shoulder and chest of the occupant 14, and the lap webbing 18B of the webbing 18 is attached laterally to the waist of the occupant 14.

  In the event of an emergency (such as a collision) of the vehicle, the lock mechanism of the winding device 20 is actuated, and the withdrawal of the webbing 18 from the winding device 20 is locked. Therefore, the shoulder webbing 18A of the webbing 18 restrains the shoulder and chest of the occupant 14, and the lap webbing 18B of the webbing 18 restrains the waist of the occupant 14.

  Further, in the event of a vehicle emergency (such as when a collision is detected), the inflator 44 instantaneously generates a high-pressure gas, and the gas is supplied into the bag 30 via the tube 42. While being broken, the bag 30 is inflated and deployed on one side in the thickness direction of the webbing 18. Therefore, the kinetic energy of the occupant 14 is absorbed by the bag 30 (gas in the bag 30 is gradually discharged by the load from the occupant 14 to the bag 30), and the load applied to the occupant 14 from the webbing 18 is reduced. Is done.

  Here, a first coupling portion 36 is provided in a range of the bag 30 that faces the lower side of the chest from the shoulder of the occupant 14, and the first coupling portion 36 has a widthwise center line (webbing 18) of the bag 30. The surface layer 32A and the back layer 32B of the bag 30 are coupled to each other at a position shifted to one side (upper side) of the bag 30 in the width direction.

  For this reason, when the bag 30 is inflated and deployed, the inflation and deployment at the position of the shoulder webbing 18A of the bag 30 is suppressed on the one side in the width direction of the bag 30 by the first coupling portion 36. The position of the webbing 18A can be curved and deformed in a convex shape toward the other side (lower side) in the width direction of the bag 30 by inflating and deploying, and the position of the shoulder webbing 18A of the bag 30 in the other side in the width direction of the bag 30 can be expanded and deployed Can be displaced. Thereby, the load which acts on the chest (especially the center part of the horizontal direction of the lower part of a chest part) and the neck part of the passenger | crew 14 from the position of the shoulder webbing 18A of the bag 30 can be reduced effectively.

  Further, the first coupling portion 36 is coupled to the shoulder webbing 18A. For this reason, when the bag 30 is inflated and deployed, the shoulder webbing 18A is curved and deformed in a convex shape toward the other side (downside) in the width direction of the bag 30 from the inflation and deployment at the position of the shoulder webbing 18A of the bag 30. The shoulder webbing 18A can be displaced to the other side in the width direction of the bag 30. As a result, it is possible to effectively reduce the load applied from the shoulder webbing 18A to the chest of the occupant 14 (particularly the central portion in the left-right direction at the lower part of the chest) and the neck.

  Moreover, as described above, the first coupling portion 36 couples the surface layer 32A and the back layer 32B of the bag 30. Therefore, unlike the case where the first coupling portion 36 connects the surface layer 32A and the back layer 32B of the bag 30 via a tether, the position of the shoulder webbing 18A of the bag 30 when the bag 30 is inflated and deployed. Is effectively suppressed on one side in the width direction of the bag 30 by the first coupling portion 36, so that the position of the shoulder webbing 18A of the bag 30 is expanded and deployed on the other side in the width direction (lower side) of the bag 30. The shoulder webbing 18A of the bag 30 can be effectively curved and deformed in a convex shape, and the position of the shoulder webbing 18A of the bag 30 can be effectively displaced to the other side in the width direction of the bag 30 by expansion and deployment. As a result, the load applied to the shoulder webbing 18A of the bag 30 and the shoulder webbing 18A from the shoulder webbing 18A to the chest of the occupant 14 (particularly the central portion in the left-right direction below the chest) and the neck can be further effectively reduced.

  Further, the first coupling portion 36 extends in the width direction of the bag 30, and the longitudinal middle portion of the first coupling portion 36 extends to the width direction one side end (upper end) of the shoulder webbing 18 </ b> A in the thickness direction of the webbing 18. Are opposed to each other. For this reason, when the bag 30 is inflated and deployed, the pressure of the gas supplied into the bag 30 via the inside of the tube 42 increases on the tube 42 side of the first coupling portion 36, so that the bag 30 is shouldered. It is possible to suppress bending along the one side end of the webbing 18A in the width direction. In addition, since the gas is guided in the width direction of the bag 30 by the first coupling portion 36, the expansion and deployment force in the width direction of the bag 30 can be increased. Thereby, the position of the shoulder webbing 18A of the bag 30 can be effectively inflated and deployed in the width direction, and the kinetic energy of the occupant 14 can be effectively absorbed by the position of the shoulder webbing 18A of the bag 30, so that the shoulder webbing 18A Therefore, the load acting on the occupant 14 can be effectively reduced.

  Further, the second coupling portion 38 extends in the width direction of the bag 30, and the longitudinal middle portion of the second coupling portion 38 is opposed to both ends in the width direction of the shoulder webbing 18 </ b> A in the thickness direction of the webbing 18. For this reason, when the bag 30 is inflated and deployed, the pressure of the gas supplied into the bag 30 through the inside of the tube 42 increases on the tube 42 side of the second coupling portion 38, so that the bag 30 is shouldered. It is possible to prevent the webbing 18A from being bent along both ends in the width direction. In addition, since the gas is guided in the width direction of the bag 30 by the second coupling portion 38, the expansion and deployment force in the width direction of the bag 30 can be increased. As a result, the position of the shoulder webbing 18A of the bag 30 can be more effectively inflated and deployed in the width direction, and the kinetic energy of the occupant 14 can be more effectively absorbed by the position of the shoulder webbing 18A of the bag 30. The load applied to the occupant 14 from the webbing 18A can be more effectively reduced.

  Further, as described above, the bag 30 and the webbing 18 are curved and deformed in the width direction by the expansion and deployment of the bag 30. For this reason, before the bag 30 is inflated and deployed and after the inflation and deployment (after the gas in the bag 30 is discharged), the bag 30 and the webbing 18 are not curved and deformed in the width direction. It is possible to suppress or prevent the influence of the bag 30 on the winding (storage) of the vehicle, and to suppress or prevent the influence of the bag 30 on the restraining performance of the occupant 14 by the webbing 18.

  Further, as described above, the bag 30 is curved and deformed in the width direction by the expansion and deployment. For this reason, it is not necessary to weave the bag 30 into a bag shape that is curved and deformed in the width direction. Moreover, even when the bag 30 is manufactured by stitching the surface layer 32A and the back layer 32B of the bag 30 cut from the belt-like base fabric that is not bent and deformed in the width direction, the surface layer 32A and the back layer of the bag 30 are manufactured from the base fabric. 32B can be easily cut off (there is no wasted part of the base fabric). Thereby, manufacture of the bag 30 can be made easy.

  Moreover, the 1st coupling | bond part 36 and the 2nd coupling | bond part 38 are formed by single weave, and couple | bond the surface layer 32A and the back layer 32B. For this reason, the 1st coupling | bond part 36 and the 2nd coupling | bond part 38 can be formed at the time of weaving of the bag 30, and the 1st coupling | bond part 36 and the 2nd coupling | bond part 38 can be provided in the bag 30 easily.

[Second Embodiment]
FIG. 5 is a developed plan view showing a main part of the air belt 16 in the seat belt device 50 according to the second embodiment to which the webbing device of the present invention is applied.

  The seat belt device 50 according to the present embodiment has substantially the same configuration as the first embodiment, but differs in the following points.

  As shown in FIG. 5, in the air belt 16 of the seatbelt device 50 according to the present embodiment, the longitudinal direction of the predetermined number of first coupling portions 36 in the bag 30 is arranged non-parallel to the width direction of the bag 30. The first coupling portion 36 on the longitudinal base end side (the webbing 18 longitudinal base end side) of the bag 30 is inclined in a direction toward the longitudinal base end side of the bag 30 toward the inner side in the width direction of the bag 30. The first coupling portion 36 at the longitudinal direction front end side (the webbing 18 longitudinal direction distal side) of the bag 30 is inclined in the direction toward the longitudinal direction distal end side of the bag 30 as it goes inward in the width direction of the bag 30. Further, the first coupling portion 36 on the outer side in the longitudinal direction of the bag 30 has a larger inclination angle with respect to the width direction of the bag 30 than the first coupling portion 36 on the inner side in the longitudinal direction of the bag 30.

  Here, also in this embodiment, the same operation and effect as the first embodiment can be obtained.

  Further, the longitudinal direction of the first coupling portion 36 of the bag 30 is arranged non-parallel to the width direction of the bag 30, and the first coupling portion 36 on the proximal end side in the longitudinal direction of the bag 30 is directed inward in the width direction of the bag 30. The first coupling portion 36 at the distal end side in the longitudinal direction of the bag 30 is directed toward the distal end side in the longitudinal direction of the bag 30 as it goes inward in the width direction of the bag 30. Inclined in the direction.

  For this reason, when the bag 30 is inflated and deployed, the position of the shoulder webbing 18A of the bag 30 can be further curved and deformed to the other side in the width direction (lower side) of the bag 30 by inflation and deployment. The position of the shoulder webbing 18A of the bag 30 can be displaced further to the other side in the width direction of the bag 30 by inflating and deploying. Thereby, the load applied to the chest of the occupant 14 (particularly the central portion in the left-right direction below the chest) and the neck from the position of the shoulder webbing 18A of the bag 30 can be reduced more effectively.

  Moreover, when the bag 30 is inflated and deployed, the shoulder webbing 18A can be further curved and deformed to the other side (lower side) in the width direction of the bag 30 by the inflation and deployment at the position of the shoulder webbing 18A of the bag 30. Thus, the shoulder webbing 18A can be displaced further to the other side in the width direction of the bag 30. As a result, the load applied from the shoulder webbing 18 </ b> A to the chest of the occupant 14 (particularly the central portion in the left-right direction below the chest) and the neck can be more effectively reduced.

  Further, the first coupling portion 36 on the outer side in the longitudinal direction of the bag 30 has a larger inclination angle with respect to the width direction of the bag 30 than the first coupling portion 36 on the inner side in the longitudinal direction of the bag 30.

  For this reason, when the bag 30 is inflated and deployed, the position of the shoulder webbing 18A of the bag 30 can be further curved and deformed to the other side (downside) in the width direction of the bag 30 by inflating and deploying. The position of the shoulder webbing 18A of the bag 30 can be further displaced to the other side in the width direction of the bag 30 by inflating and deploying. Thereby, the load applied to the chest of the occupant 14 (particularly the central portion in the left-right direction below the chest) and the neck from the position of the shoulder webbing 18A of the bag 30 can be further effectively reduced.

  Moreover, when the bag 30 is inflated and deployed, the shoulder webbing 18A is further curved and deformed to the other side (downside) in the width direction of the bag 30 from the inflation and deployment at the position of the shoulder webbing 18A of the bag 30. Therefore, the shoulder webbing 18A can be further displaced to the other side in the width direction of the bag 30. As a result, the load applied from the shoulder webbing 18 </ b> A to the chest of the occupant 14 (particularly the central portion in the left-right direction below the chest) and the neck can be further effectively reduced.

  In the first embodiment and the second embodiment, a gap is formed between the first coupling portion 36 of the bag 30 and the side coupling portion 34A. However, the first coupling portion 36 and the side coupling portion 34A of the bag 30 may be connected. In this case, when the bag 30 is inflated and deployed, the position of the shoulder webbing 18A of the bag 30 can be effectively curved and deformed to the other side (downside) in the width direction of the bag 30 by the inflation and deployment. The shoulder webbing 18A of the bag 30 can be effectively displaced to the other side in the width direction of the bag 30 by inflating and deploying, and the shoulder webbing 18A can be effectively displaced to the other side in the width direction of the bag 30. Can do. Moreover, when the bag 30 is inflated and deployed, the pressure of the gas supplied into the bag 30 through the inside of the tube 42 is effectively increased on the tube 42 side of the first coupling portion 36, so that the bag 30 Can be effectively prevented from being bent along one side end in the width direction of the shoulder webbing 18A, and the gas is effectively guided in the width direction of the bag 30 by the first coupling portion 36. The expansion and deployment force in the width direction of 30 can be effectively increased.

  Moreover, in the said 1st Embodiment and 2nd Embodiment, the 1st coupling | bond part 36 was provided in the range opposed to the chest lower part vicinity from the shoulder part of the passenger | crew 14 in the bag 30. FIG. However, the first coupling portion 36 may be provided at any longitudinal position of the bag 30, for example, the first coupling portion 36 may be provided at the position of the lap webbing 18B of the bag 30.

  Furthermore, in the said 1st Embodiment and 2nd Embodiment, the 1st coupling | bond part 36 of the bag 30 was arrange | positioned in the position shifted | deviated to the width direction one side (upper side) of the bag 30. FIG. However, you may arrange | position the 1st coupling | bond part 36 of the bag 30 in the position shifted | deviated to the width direction other side (lower side) of the bag 30. FIG.

  Moreover, in the first embodiment and the second embodiment, the first coupling portion 36 of the bag 30 is arranged at a position shifted to one side in the width direction of the bag 30. However, the first coupling portion 36 of the bag 30 may be disposed asymmetrically with respect to the center line in the width direction of the bag 30. For example, the arrangement density of the first coupling portions 36 of the bag 30 may be made different between the one side in the width direction of the bag 30 and the other side in the width direction. One side in the direction may be different from the other side in the width direction, and the size (area) of the first coupling portion 36 of the bag 30 may be different between the one side in the width direction of the bag 30 and the other side in the width direction. .

  Moreover, in the said 1st Embodiment and 2nd Embodiment, the 1st coupling | bond part 36 and the 2nd coupling | bond part 38 of the bag 30 were formed by single woven, and couple | bonded the surface layer 32A and the back layer 32B of the bag 30. FIG. However, at least one of the first coupling portion 36 and the second coupling portion 38 of the bag 30 may be coupled in a state where the surface layer 32A and the back layer 32B of the bag 30 are overlapped by, for example, sewing or adhesion.

  Further, in the first embodiment and the second embodiment, the bag 30 (the center in the width direction) is arranged on one side in the thickness direction of the webbing 18, and the bag 30 is inflated and deployed on one side in the thickness direction of the webbing 18. Is done. However, the bag 30 (for example, the central portion in the width direction) may be disposed on the other side in the thickness direction of the webbing 18, and the bag 30 may be inflated and deployed on the other side in the thickness direction of the webbing 18. Further, the bag 30 may be disposed inside the webbing 18 (middle in the thickness direction), and the bag 30 may be inflated and deployed inside the webbing 18 (middle in the thickness direction). In addition, the bag 30 is disposed in the middle in the longitudinal direction of the webbing 18 (between the longitudinal base end portion and the longitudinal distal end portion of the webbing 18), and the bag 30 is disposed in the longitudinal middle of the webbing 18 (the longitudinal direction of the webbing 18). (Between the directional proximal end portion and the longitudinal distal end portion).

10 Seat belt device (webbing device)
14 Crew 18 Webbing 30 Bag (bag)
32A surface layer (first layer)
32B Back layer (second layer)
36 1st coupling | bond part (joint part)
50 Seat belt device (webbing device)

Claims (6)

A bag that is provided on a webbing that is mounted on a vehicle occupant, and that is provided with a first layer and a second layer facing each other and inflated by supplying fluid therein;
A coupling part for coupling the first layer and the second layer at a position asymmetric with respect to the center of the webbing width direction of the bag body to form an unexpanded portion of the bag body ;
Webbing device equipped with.   The webbing device according to claim 1, wherein the coupling part arranged on the chest of the occupant is arranged to be shifted upward with respect to the center of the bag body in the webbing width direction.   The webbing device according to claim 1 or 2, wherein the coupling portion is connected to an end of the bag body in the webbing width direction.   The webbing device according to any one of claims 1 to 3, wherein the coupling portion is opposed to an end in the width direction of the webbing.   The webbing device according to any one of claims 1 to 4, wherein the webbing is displaced in a width direction by the bag body being inflated.   The webbing device according to any one of claims 1 to 5, wherein the joint portion is extended non-parallel to the width direction of the webbing.

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