JP2016135661A - Air belt device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air belt device capable of suppressing the variation of thickness along a longitudinal direction of a bag body.SOLUTION: In the folding state of the bag body 38 of an air belt device 20, the position of the end of the tip side in a longitudinal direction of the bag body 38 at the expansion part 52 of the bag body 38 is at the tip side in the longitudinal direction of the bag body 38 from the tip side in the longitudinal direction of the bag body 38 in an expansion part 54. Accordingly, the expansion part 52 and the expansion part 54 do not overlap in the thickness direction of the bag body 38 at the tip side in the longitudinal direction of the bag body 38 from the tip side in the longitudinal direction of the bag body 38 in the expansion part 54.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an air belt device including a bag body that is inflated by the pressure of a fluid.

  Some inflatable belt devices are provided with a bag between two webbings that are divided in the longitudinal direction. In a vehicle emergency, gas is supplied to the bag body, and the bag body is inflated on the vehicle front side of the occupant's body. (For example, see Patent Document 1 below).

  In this air belt device, the bag body before expansion is folded in the width direction of the webbing. The thickness of the folded bag is larger than the thickness of the webbing. For this reason, only the part of the bag body between the webbings divided into two is suddenly thickened.

JP 2013-28241 A

  In view of the above fact, an object of the present invention is to obtain an air belt device capable of suppressing a change in thickness along the longitudinal direction of a bag body.

  The air belt device according to claim 1 is extended to one side in the width direction and the other side in the width direction, and in the folded state, a pair of extension portions that are folded to the center side in the width direction are formed and supplied to the inside. The bag body is inflated by the pressure of the fluid and one end in the longitudinal direction of the expansion portion on one side in the width direction is shifted from one end in the longitudinal direction of the expansion portion on the other side in the width direction. It has.

  In the inflatable belt device according to the first aspect, one end in the longitudinal direction of the extension portion on one side in the width direction of the bag body is shifted to one side in the longitudinal direction from one end in the longitudinal direction of the extension portion on the other side in the width direction of the bag body. For this reason, both expansion parts do not overlap in the folded state of the bag body on one side in the longitudinal direction from one end in the longitudinal direction of the expansion part on the other side in the width direction of the bag body. Thereby, the change of the thickness along the longitudinal direction of the folded bag body can be suppressed.

  The inflatable belt device according to claim 2 is the inflatable belt device according to in claim 1, wherein the front end side in the longitudinal direction is inserted into the bag body from one longitudinal end of the bag body and along the one end in the width direction of the bag body. In the extended portion on one side in the width direction of the bag body, a cylindrical body that is folded together with the extended portion toward the center in the width direction of the bag body is connected to a longitudinal base end portion of the cylindrical body And a fluid generating means for generating the fluid by being actuated and supplying the fluid into the bag through the cylinder.

  In the air belt device according to claim 2, the cylindrical body inserted into the bag body along one end in the width direction of the bag body is folded to the center in the width direction of the bag body together with the extension portion on one side in the width direction of the bag body. Be turned. Here, on one side in the longitudinal direction from one end in the longitudinal direction of the extension part on the other side in the width direction of the bag body, both extension parts do not overlap in the folded state of the bag body, so the longitudinal direction of the folded bag body It is possible to suppress a change in thickness along the line.

  The air belt device according to claim 3 is extended to one side in the width direction and the other side in the width direction, and in the folded state, a pair of extension portions that are folded to the center side in the width direction are formed, and the longitudinal direction A belt-like extension extends from the end, and includes a bag body that is inflated by the pressure of the fluid supplied to the inside.

  In the inflatable belt device according to claim 3, a belt-like extension is extended from the longitudinal end of the bag, and when the bag is folded, the bag extends to the outside in the longitudinal direction of the folded portion of the expansion portion. Parts are arranged. For this reason, the change of the thickness along the longitudinal direction of the folded bag body can be suppressed.

  The air belt device according to claim 4 is the air belt device according to claim 3, further comprising winding means for winding and storing the folded bag body, and the bag in the folded state. The width of the body is constant in the longitudinal direction of the bag.

  In the air belt device according to claim 4, since the width dimension of the bag body is constant in the longitudinal direction of the bag body in the folded state of the bag body, the bag body wound around the winding means is the winding shaft. An increase in the direction can be suppressed.

  The air belt device according to claim 5 is the air belt device according to claim 3, wherein the belt member is thinner than the folded bag body and connected to the bag body, and the bag member of the belt member. Has a winding member on which the belt-like member is locked on the opposite side, and winding means for winding and storing the belt-like member and the bag body by rotating the winding member in the winding direction. It is equipped with.

  In the air belt device according to the fifth aspect, the bag is connected to the belt-like member, and the side of the belt-like member opposite to the bag is locked to the winding member of the winding means. For this reason, after a strip | belt-shaped member is wound up by the winding member, a bag body is wound up by the winding member. Here, since the belt-like member is thinner than the folded bag body, the winding thickness of the bag body and the belt-like member at the winding member in a state where the bag body is wound and stored by the winding member. Can be reduced.

  As described above, in the air belt device according to the present invention, it is possible to suppress a change in thickness along the longitudinal direction of the bag body.

1 is a front view of a seat belt device to which an air belt device according to an embodiment of the present invention is applied. It is a front view corresponding to Drawing 1 in the state of expansion of a bag. (A) is a plan view of the longitudinal direction proximal end side of the air belt device viewed in the thickness direction of the bag body, (B) is a development plan view of the bag body corresponding to (A), (C) is (A 3C is a cross-sectional view taken along line 3C-3C. (A) is the top view of the air belt device which looked at the longitudinal direction front end side of the bag body in the expansion part of the bag body in the thickness direction, and (B) is the development top view of the bag body corresponding to (A). (A) is sectional drawing along the 5A-5A line of FIG. 4 (A), (B) is sectional drawing along the 5B-5B line of FIG. 4 (A).

  Next, a seat belt device 10 to which an air belt device 20 according to an embodiment of the present invention is applied will be described with reference to FIGS. 1 and 2, the arrow UP indicates the vehicle upper side on which the seat belt device 10 is mounted, and the arrow OUT indicates the vehicle width direction outer side. 3 (A), 3 (B), 4 (A), and 4 (B), hatched portions indicate a layer portion 40, a guide portion 58, and an extension portion 60 of the bag body 38 to be described later. It does not show the cross section of the bag body 38.

<Configuration of the present embodiment>
As shown in FIG. 1, the seat belt apparatus 10 includes a retractor 12 as a winding means. The retractor 12 is disposed outside the vehicle seat 14 in the vehicle width direction and below the vehicle. The retractor 12 includes a retractor frame, and the retractor frame of the retractor 12 is fixed to the vehicle body. A spool 16 as a winding member is rotatably supported on the retractor frame of the retractor 12, and the spool 16 is biased by a biasing force of a biasing means such as a spiral spring in the winding direction around the central axis. Yes. Furthermore, the longitudinal direction proximal end side of the webbing 18 as a belt-like member is locked to the spool 16, and when the spool 16 is rotated in the winding direction, the webbing 18 is wound around the spool 16. Further, the retractor 12 includes a lock mechanism (not shown), and the lock mechanism is activated in the event of a vehicle emergency such as a vehicle collision. When the lock mechanism is activated, rotation of the spool 16 in the pulling direction opposite to the winding direction is prevented by the lock mechanism.

  The webbing 18 extends from the spool 16 to the upper side of the vehicle. As shown in FIGS. 3A and 3B, the cover 22 of the air belt device 20 is attached to the front end of the webbing 18 in the longitudinal direction (the end on the arrow L1 direction side in FIGS. 3A and 3B). A longitudinal base end portion of the cover belt 24 as a restraining means to be configured is fixed by sewing or the like. The cover belt 24 is formed in a long belt shape, and the elongation (elongation rate with respect to a constant tensile force) of the cover belt 24 is approximately the same as that of the webbing 18.

  Further, as shown in FIG. 1, a through anchor 26 is provided on the vehicle upper side of the retractor 12. The through anchor 26 is attached to a center pillar which is an aspect of the side wall of the vehicle. The through anchor 26 is formed with a through anchor insertion hole. When the webbing 18 is wound around the spool 16, the cover 22 is inserted into the through anchor insertion hole of the through anchor 26 and folded back to the lower side of the vehicle. Yes. Further, the length of the webbing 18 is set so that the cover 22 passes through the through anchor insertion hole of the through anchor 26 when the webbing 18 is all pulled out from the spool 16. Further, an anchor plate 28 is provided on the outer side in the vehicle width direction of the seat 14 and on the lower side of the vehicle.

  The anchor plate 28 is fixed to the vehicle body or the seat frame of the seat 14, and the longitudinal end portion of the cover belt 24 of the cover 22 of the air belt device 20 is locked to the anchor plate 28. A tongue 30 is provided between the through anchor 26 and the anchor plate 28 of the cover 22. A tongue insertion hole is formed in the tongue 30, and the webbing 18 is inserted into the tongue insertion hole. For this reason, the tongue 30 can move along the air belt device 20.

  On the other hand, a buckle 32 is provided inside the seat 14 in the vehicle width direction. The buckle 32 is fixed to the vehicle body or the frame of the seat 14. When the tongue 30 is held by the buckle 32 in a state where the air belt device 20 is hooked on the body of the occupant 34, the air belt device for the body of the occupant 34. 20 will be attached.

  As shown in FIGS. 3A and 3C, the cover 22 of the air belt device 20 includes a cover stretch 36. The cover stretch 36 is formed in a strip shape whose longitudinal dimension is shorter than that of the cover belt 24, and the elongation of the cover stretch 36 is higher than that of the cover belt 24. The cover stretch 36 is opposed to the cover belt 24 in the thickness direction of both the cover stretch 36 and the cover belt 24 on the distal end side in the longitudinal direction from the longitudinal base end of the cover belt 24.

  Moreover, in the portion between the tongue 30 and the through anchor 26 in the air belt device 20, the cover stretch 36 is opposite to the body of the occupant 34 of the cover belt 24 with the air belt device 20 mounted on the body of the occupant 34. (Arrows in the direction of arrow T1 in FIGS. 3C, 5A, and 5B). Further, as shown in FIGS. 5 (A) and 5 (B), both ends in the width direction of the cover stretch 36 and both ends in the width direction of the cover belt 24 are joined together by stitching. It is formed in a cylindrical shape that is opened at least at the longitudinal end portion (the arrow L1 direction side in FIGS. 3B and 4B). The width of the cover 22 is substantially equal to the width of the webbing 18, and when the spool 16 is further rotated in the winding direction with the webbing 18 fully wound on the spool 16 of the retractor 12, the cover 22 is moved to the spool 16. It is wound up.

  Further, as shown in FIGS. 3A and 3B, the air belt device 20 includes a bag body 38. The bag body 38 is formed by bag weaving, and the longitudinal direction of the bag body 38 is along the longitudinal direction of the cover 22. As shown in FIGS. 3B and 4B, both end portions in the width direction of the bag body 38 are formed as a single layer portion 40. In the single layer portion 40, the bag body 38 has a one-layer structure (single woven). It is said that. The first layer 42 and the second layer 44 are formed on the bag body 38 on the center side in the width direction of the bag body 38 with respect to both the single-layer portions 40, and the bag body 38 has a two-layer structure (double weave). Has been. In the portion between the tongue 30 and the through anchor 26 in the air belt device 20, the first layer 42 of the bag body 38 is in a state where the air belt device 20 is attached to the body of the occupant 34 (shown in FIG. 1). Is disposed closer to the occupant 34 than the layer 44 (the direction of the arrow T2 in FIG. 3C and FIG. 5).

  As for the bag body 38, the width direction one side part is folded rather than the width direction center side part in the width direction center side in folding position F1 (FIG. 3 (B) and FIG. 4 (B) one-dot chain line F1). . In contrast, in the bag body 38, the width direction other side portion is closer to the width direction center side at the folding position F2 (the dashed line F2 in FIGS. 3B and 4B) than the width direction center side portion. It is folded. The width dimension of the folded bag body 38 is substantially constant in the longitudinal direction, and the maximum thickness dimension of the folded bag body 38 is the webbing 18, the cover belt 24 of the cover 22, and the cover 22. Thicker than any of the cover stretches 36. The bag body 38 is housed in the cover 22 in this folded state (that is, between the cover belt 24 and the cover stretch 36 of the cover 22) (FIGS. 1, 3A, and 4A). And the state shown in FIG.

  On the other hand, as shown in FIG. 1, an inflator 46 as a fluid generating means is provided on the outer side in the vehicle width direction of the seat 14 and on the lower side of the vehicle, and the inflator 46 has a longitudinal direction of a tube 48 as a cylindrical body. The proximal end is connected. The distal end side of the tube 48 in the longitudinal direction is inserted into the cover 22 from the distal end in the longitudinal direction of the cover 22, and further inserted into the bag body 38 from the distal end in the longitudinal direction of the bag body 38. As shown in FIG. 4B, the distal end side in the longitudinal direction of the tube 48 is disposed in the bag body 38 along one end portion in the width direction in the bag body 38.

  The inflator 46 is electrically connected to an ECU as a control device, and the ECU is electrically connected to a collision detection sensor such as a load detection sensor or an acceleration sensor provided on the vehicle body. When the collision of the vehicle is detected by the collision detection sensor, the ECU activates the inflator 46. When the inflator 46 is operated by the ECU, the inflator 46 generates gas as a fluid. The gas generated in the inflator 46 passes through the tube 48 and is released into the bag body 38 from the distal end in the longitudinal direction of the tube 48. The bag body 38 is expanded by the pressure of the gas.

  On the other hand, as shown in FIGS. 3B and 4B, the bag body 38 is provided with expansion portions 52 and 54. These extended portions 52 and 54 are formed on the base end side in the longitudinal direction (the arrow L2 direction side in FIG. 4B) with respect to the front end portion 56 in the longitudinal direction of the bag body 38. The expansion part 52 extends to the width direction one side (the arrow W1 direction side in FIGS. 3B and 4B) of the bag body 38 from the longitudinal direction front end side portion 56 of the bag body 38, and the expansion part 54 extends to the other side in the width direction of the bag body 38 (the arrow W2 direction side in FIG. 3B and FIG. 4B) from the front end portion 56 in the longitudinal direction of the bag body 38.

  Further, as shown in FIG. 4B, the end of the extended portion 54 on the front end side in the longitudinal direction of the bag body 38 is more than the end of the extended portion 52 on the front end side in the longitudinal direction of the bag body 38. 3B, as shown in FIG. 3B, the end portion of the bag body 38 in the longitudinal direction in the expanded portion 54 is the length of the bag body 38 in the expanded portion 52. It is located on the longitudinal base end side of the bag body 38 with respect to the end portion on the base side in the direction (that is, the expansion portion 54 is formed to be shifted to the base end side in the longitudinal direction of the bag body 38 with respect to the expansion portion 52. ing). Moreover, the longitudinal direction proximal end portion of the bag body 38 with respect to the expansion portion 52 in the expansion portion 54 has a single-layer structure (single woven), and cannot expand even if gas is supplied into the bag body 38.

  The distal end side of the tube 48 inserted into the bag body 38 is the width of the bag body 38 along the end of the expansion portion 52 on one side in the width direction of the bag body 38 (the arrow W1 direction side in FIG. 4B). It is displaced in one direction. Therefore, in the folded state of the bag body 38, the tube 48 is folded together with the bag body 38 at the folding position F <b> 1 on one side in the width direction of the bag body 38.

  A plurality of guiding portions 58 are formed in the bag body 38. These guide portions 58 are formed by forming the bag body 38 in a single layer structure (single woven) at a part between both folding positions F1 and F2 of the bag body 38, and these guide portions 58. Are intermittently formed in the longitudinal direction of the bag body 38. When the air belt device 20 is assembled, the tube 48 inserted from the front end in the longitudinal direction of the bag body 38 is guided by these guiding portions 58 so as to be displaced to one side in the width direction of the bag body 38 in the expansion portion 52.

  On the other hand, the bag body 38 is provided with an extension 60. The extension part 60 is formed on the longitudinal direction proximal end side (the arrow L2 direction side in FIG. 3B) of the bag body 38 relative to the expansion part 54 of the bag body 38. The width dimension of the extension portion 60 is substantially the same as the width dimension of the front end portion 56 in the longitudinal direction of the bag body 38, and the width direction center of the bag body 38 in the extension portion 60 and the front end in the longitudinal direction of the bag body 38. The center of the side portion 56 in the width direction of the bag body 38 substantially matches. The extension portion 60 is formed by forming the bag body 38 into a single layer structure (single woven), and the longitudinal base end portion of the bag body 38 in the extension portion 60 is joined to the cover belt 24 by sewing. The extension 60 is indirectly coupled to the webbing 18 via the cover belt 24.

<Operation and effect of the present embodiment>
In the seat belt device 10, the tongue 30 is gripped and pulled by the occupant 34 seated on the seat 14. As a result, the webbing 18 and the air belt device 20 are drawn around the body of the occupant 34 from the front side of the occupant 34 while being pulled out of the spool 16 of the retractor 12. When the tongue 30 is held by the buckle 32 in this state, the air belt device 20 is attached to the body of the occupant 34 as shown in FIG.

  In this state, when the vehicle collides, the lock mechanism provided in the retractor 12 is operated, and the spool 16 of the retractor 12 is restricted from rotating in the pull-out direction by the lock mechanism. As a result, the withdrawal of the webbing 18 from the spool 16 is restricted. The front end of the webbing 18 in the longitudinal direction is joined to the longitudinal base end of the cover belt 24 of the cover 22 of the air belt device 20 by stitching, and the elongation of the cover belt 24 is approximately the same as that of the webbing 18. Yes. For this reason, the passenger | crew's 34 body can be restrained with the cover belt 24, and it can restrict | limit effectively that the passenger | crew's 34 body is inertial-moved to the vehicle front side.

  Further, when a vehicle collision is detected by the collision detection sensor, the inflator 46 is operated by the ECU, whereby gas is generated in the inflator 46. The gas generated in the inflator 46 is supplied into the bag body 38 through the tube 48. Accordingly, when the internal pressure of the bag body 38 is increased, the stitched portion of the cover belt 24 and the cover stretch 36 of the cover 22 of the bag body 38 is broken, and the bag body 38 is further expanded.

  When the bag body 38 is inflated in this way, the expansion portions 52 and 54 of the bag body 38 are deployed on the front side of the vehicle of the chest of the body of the occupant 34. As shown in FIG. 2, the expanded portions 52 and 54 are disposed on the outer side in the width direction of the cover belt 24 of the cover 22 in the deployed bag body 38. For this reason, on the outer side in the width direction of the cover belt 24, the body of the occupant 34 can come into contact with the expanded and deployed expansion parts 52, 54, and thereby the load from the body of the occupant 34 trying to move inertially toward the vehicle front side. The area which receives can be expanded and the load which the body of the passenger | crew 34 receives from the vehicle front side can be disperse | distributed.

  By the way, the tube 48 is disposed along one end portion in the width direction of the bag body 38, and the tube 48 extends at the distal end side in the longitudinal direction of the bag body 38 in the expansion portion 52 of the bag body 38. Is displaced to one side in the width direction of the bag body 38 along one end portion in the width direction of the bag body 38 in FIG. Therefore, the tube 48 is folded together with the bag body 38 at the folding position F <b> 1 on one side in the width direction of the bag body 38 on the distal end side in the longitudinal direction of the bag body 38 in the extended portion 52. At the position where the tube 48 is folded, as shown in FIG. 5A, the one side portion in the width direction of the tube 48 and the other side portion in the width direction of the tube 48 are in the thickness direction of the bag body 38. Overlapping.

  Here, the end portion of the bag body 38 at the distal end side in the longitudinal direction of the expansion portion 52 of the bag body 38 is closer to the distal end side in the longitudinal direction of the bag body 38 than the end portion of the expansion portion 54 at the distal end side in the longitudinal direction of the bag body 38. positioned. For this reason, in the folded state of the bag body 38, the expansion portion 52 and the expansion portion 54 are located closer to the front end side in the longitudinal direction of the bag body 38 than the end portion on the front end side in the longitudinal direction of the bag body 38 in the expansion portion 54. It is not opposed in the thickness direction. For this reason, even if the width direction one side part of the tube 48 and the width direction other side part of the tube 48 overlap in the thickness direction of the bag body 38 in such a position, the folded bag body including the tube 48 An increase in the thickness dimension of 38 can be suppressed. Thereby, the change of the thickness dimension of the bag body 38 along the longitudinal direction of the bag body 38 can be moderated, and the change of the thickness dimension along the longitudinal direction of the cover 22 can be moderated.

  On the other hand, the base end side in the longitudinal direction of the bag body 38 from the extended portion 54 is an extension portion 60, and the bag body 38 has a one-layer structure in the extension portion 60. For this reason, in the extension part 60 and the part in which the expansion part 52 and the expansion part 54 overlapped in the thickness direction of the bag body 38 in the bag body 38, a difference occurs in the thickness dimension of the bag body 38. Here, the end in the longitudinal direction proximal end side of the bag body 38 in the extended portion 54 of the bag body 38 is longer than the end in the longitudinal direction proximal end side of the bag body 38 in the expanded portion 52. Located on the end side.

  For this reason, in the folded state of the bag body 38, the expansion portion 54 and the expansion portion 52 are located on the longitudinal direction proximal end side of the bag body 38 with respect to the longitudinal direction proximal end side of the bag body 38 in the expansion portion 52. The body 38 is not opposed in the thickness direction. For this reason, the thickness dimension of the bag body 38 in this portion is larger than the thickness dimension of the bag body 38 in the portion where the expansion portion 52 and the expansion portion 54 overlap in the thickness direction of the bag body 38 in the bag body 38. Is smaller than the thickness of the bag body 38 at the extension 60. For this reason, the change of the thickness dimension of the bag body 38 along the longitudinal direction of the bag body 38 can be moderated. In addition, since the extension portion 60 extends to the base end side in the longitudinal direction of the bag body 38 from the expansion portion 54 of the bag body 38, the change in the thickness dimension of the cover 22 along the longitudinal direction of the cover 22 can be moderated. .

  As described above, in the present embodiment, since the change in the thickness dimension of the cover 22 along the longitudinal direction of the cover 22 can be moderated, when the occupant 34 wears the air belt device 20, the longitudinal direction of the cover 22 is increased. A sense of incongruity due to a change in the thickness dimension of the cover 22 along can be reduced. Moreover, when the cover 22 is wound around the spool 16 of the retractor 12, the change in the winding thickness of the cover 22 along the circumferential direction of the spool 16 can be moderated.

  The bag body 38 is accommodated in the cover 22 in a folded state. Here, the width dimension of the folded bag body 38 is substantially constant in the longitudinal direction. For this reason, the width dimension of the cover 22 can be made substantially constant in the longitudinal direction of the cover 22. Moreover, since the width dimension of the cover 22 is substantially equal to the width dimension of the webbing 18, the cover 22 can be wound around the spool 16 and stored without particularly increasing the axial dimension of the spool 16 of the retractor 12.

  Further, all the covers 22 pass through the through anchor insertion holes of the through anchor 26 in a state where the webbing 18 is all pulled out from the spool 16 of the retractor 12. That is, in the state where the webbing 18 is all pulled out from the spool 16, there is no cover 22 on the retractor 12 side than the through anchor insertion hole of the through anchor 26. For this reason, the winding thickness of the webbing 18 and the cover 22 in the spool 16 in a state where the spool 16 of the retractor 12 has wound the cover 22 to the maximum can be reduced.

  Further, the longitudinal base end portion of the webbing 18 is locked to the spool 16 of the retractor 12. Since the webbing 18 is not a two-layer structure or a cylindrical shape but a band-shaped one-layer structure, the thickness dimension can be reduced (can be reduced). For this reason, the winding thickness of the webbing 18 and the cover 22 in the spool 16 in a state where the spool 16 of the retractor 12 has wound the cover 22 to the maximum can be reduced.

  In the present embodiment, the extension portion 60 of the bag body 38 is sewn to the cover belt 24 of the cover 22 and fixed to the cover belt 24. However, the extension 60 may be fixed to the cover stretch 36 of the cover 22 or may be fixed to the webbing 18.

  Further, in the present embodiment, with the bag body 38 inflated and deployed, the bag body 38 is pressed against the occupant 34 side between the through anchor 26 and the tongue 30 of the bag body 38 to hold the bag body 38. There is no configuration to do. However, for example, a belt-like bag body holding member having a longitudinal base end side fixed to the cover belt 24 of the webbing 18 or the cover 22 and a longitudinal front end side fixed to the cover belt 24 is provided, and the bag body 38 is expanded and deployed. In this state, the bag body holding member may be configured to hold the bag body 38 by pressing the bag body 38 toward the passenger 34 by tension. In such a configuration, the extension portion 60 of the bag body 38 may be fixed to the bag body holding member instead of the cover 22.

  Further, in the present embodiment, the belt-shaped member is the webbing 18, and the extension portion 60 of the bag body 38 is indirectly coupled to the webbing 18 via the cover belt 24 of the cover 22. However, the belt-like member is not limited to the webbing 18. For example, any one of the cover belt 24 and the cover stretch 36 of the cover 22 may be used as a belt-like member, and either the cover belt 24 or the cover stretch 36 may be locked to the spool 16 of the retractor 12 as described above. As long as the bag body holding member is provided, the bag body holding member may be a belt-like member and the bag body holding member may be locked to the spool 16.

12 Retractor (winding means)
14 Sheet 16 Spool (winding means)
18 Webbing (band-shaped member)
20 air belt device 38 bag 46 inflator (fluid generating means)
48 Tube (Cylinder)
52 Extension part 54 Extension part 60 Extension part

Claims (5)

  A pair of expansion portions are formed which are expanded to one side in the width direction and the other side in the width direction and folded to the center side in the width direction in the folded state, and are expanded by the pressure of the fluid supplied to the inside, An inflatable belt device comprising: a bag body formed such that one end in the longitudinal direction of the extension portion on one side in the width direction is shifted to one side in the longitudinal direction from one end in the longitudinal direction of the extension portion on the other side in the width direction. The longitudinal tip side is inserted into the bag body from one longitudinal end of the bag body, and is disposed along one width direction end of the bag body. A cylinder that is folded together with the portion to the center in the width direction of the bag,
Fluid generating means for supplying the fluid into the bag body through the cylinder, wherein the fluid is generated by connecting and actuating the longitudinal base end of the cylinder;
An air belt device according to claim 1.   A pair of extended portions are formed which are expanded to one side in the width direction and the other side in the width direction and folded to the center side in the width direction in the folded state, and a belt-like extension portion extends from the end in the longitudinal direction. An air belt device comprising a bag body that is inflated by the pressure of a fluid supplied to the inside.   A winding unit that winds and stores the folded bag body, and the width of the bag body is constant in the longitudinal direction of the bag body in the folded state of the bag body. The air belt device according to the description. It is thinner than the folded bag body, and a strip-shaped member connected to the bag body,
The belt-shaped member has a winding member on which the belt-shaped member is locked on the side opposite to the bag body, and the belt-shaped member and the bag body are wound by rotating the winding member in the winding direction. Winding means for taking and storing; and
An air belt device according to claim 3.

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